CA2500013C - Composite article having thermoplastic elastomer region on thermoplastic substrate - Google Patents
Composite article having thermoplastic elastomer region on thermoplastic substrate Download PDFInfo
- Publication number
- CA2500013C CA2500013C CA 2500013 CA2500013A CA2500013C CA 2500013 C CA2500013 C CA 2500013C CA 2500013 CA2500013 CA 2500013 CA 2500013 A CA2500013 A CA 2500013A CA 2500013 C CA2500013 C CA 2500013C
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- Canada
- Prior art keywords
- thermoplastic
- chain link
- styrene
- modular chain
- polycarbonate
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- Expired - Lifetime
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- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 43
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 43
- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 35
- 239000000758 substrate Substances 0.000 title abstract description 20
- 239000002131 composite material Substances 0.000 title description 4
- 239000000956 alloy Substances 0.000 claims abstract description 64
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 64
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 40
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 39
- 239000004417 polycarbonate Substances 0.000 claims abstract description 36
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 35
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 33
- 229920000728 polyester Polymers 0.000 claims abstract description 28
- 229920006465 Styrenic thermoplastic elastomer Polymers 0.000 claims abstract description 19
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 16
- -1 polyethylene terephthalate Polymers 0.000 claims description 15
- 229920000402 bisphenol A polycarbonate polymer Polymers 0.000 claims description 9
- 229920001577 copolymer Polymers 0.000 claims description 9
- 229920005996 polystyrene-poly(ethylene-butylene)-polystyrene Polymers 0.000 claims description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 8
- 239000007795 chemical reaction product Substances 0.000 claims description 8
- 229920006132 styrene block copolymer Polymers 0.000 claims description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 4
- 229940106691 bisphenol a Drugs 0.000 claims description 4
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical group C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 4
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 claims description 4
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical group C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 16
- 238000001746 injection moulding Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000007779 soft material Substances 0.000 description 3
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006778 PC/PBT Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
- B65G17/08—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface being formed by the traction element
- B65G17/086—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface being formed by the traction element specially adapted to follow a curved path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/30—Details; Auxiliary devices
- B65G17/38—Chains or like traction elements; Connections between traction elements and load-carriers
- B65G17/40—Chains acting as load-carriers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/744—Non-slip, anti-slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2369/00—Polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2375/00—Polyureas; Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2433/00—Closed loop articles
- B32B2433/02—Conveyor belts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31507—Of polycarbonate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31573—Next to addition polymer of ethylenically unsaturated monomer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
- Y10T428/31797—Next to addition polymer from unsaturated monomers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
Abstract
A method and materials are disclosed wherein a layer of a softer thermoplastic material comprising (i) a thermoplastic polyurethane or (ii) a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane can be attached to a substrate comprising a harder thermoplastic alloy including a polyester and a polycarbonate. In one form, the method and materials are used to form a modular chain link for use in constructing a modular conveyor chain. The modular chain link includes a main body comprising the thermoplastic alloy including a polyester and a polycarbonate, and a softer layer of the thermoplastic material comprising (i) a thermoplastic polyurethane or (ii) a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane disposed on at least a portion of the main body.
Description
COMPOSITE ARTICLE HAVING THERMOPLASTIC ELASTOMER
REGION ON THERMOPLASTIC SUBSTRATE
Background Of The Invention [0003] It is often desirable to manufacture a single component which has the hardness and frictional properties of a thermoplastic etastotneric material in one region and the hardness and frictional properties of another thermoplastic material in other regions. For example, the thermoplastic elastomeric material may provide functions such as a built in gasket, or soft grip for "non-slip" handling, or skid free standing plane, or a high friction top to a modular belt or conveyor chain. The harder thermoplastic material can provide structure or mechanical strength to the component. In one example application, a thermoplastic elastomer, such a styrenic block copolymer, is laminated to a hard resin. The laminate is advantageous since it has a good feel, shock absorption (cushionability) and damage-resistance because of the flexibility and elasticity of the layer of the thermoplastic elastomer and has shape-retaining and reinforcing ability because of the hard resin.
[0004] While composites of a thermoplastic elastomer and a hard resin often have advantageous properties, it may be difficult to create an acceptable bond between the thermoplastic elastomer=and the hard resin. Often mechanical coupling methods must be employed in which the thermoplastic elastomer and the hard resin are formed to have engaging means capable of being coupled together.. However, the formation of engaging means typically require molds with complicated structures for forming the engaging means.
Alternatively, the thermoplastic elastomer and the hard resin are often bonded together with some other bonding means, such as adhesives. The use of adhesives is also undesirable because it requires complicated steps to prepare the two layers followed by bonding. As a result, poorly-bonded composites are often produced, and organic solvents in adhesives often are detrimental in the working environment.
[0005] What is needed therefore is a method and materials wherein a thermoplastic elastomeric material can be readily molded to another harder thermoplastic material such that an acceptable bond forms between the thermoplastic elastomer and the harder thermoplastic material.
Summary Of The Invention [0006] The present invention provides a formulation to attach a thermoplastic material comprising a thermoplastic urethane to a thermoplastic alloy of a polyester and a polycarbonate. In one form, the thermoplastic material includes a styrenic thermoplastic elastomer and the thermoplastic urethane. Molded components can be manufactured using an alloy blend of a polyester and a polycarbonate. Components can then be manufactured which include a significant bond between the thermoplastic alloy of a polyester and a polycarbonate and the thermoplastic material. The materials can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
[0007] One advantage of the invention is to attach a relatively soft thermoplastic material, such as a thermoplastic elastomer, to a significantly harder thermoplastic material. This is advantageous in that a single component can be manufactured which has properties of the soft material in one region or part feature and the properties of the harder material in other regions or part features. The soft material may provide function such as a built in gasket, or soft grip for "non-slip" handling, or skid free standing plane, or a high friction top to a modular belt or conveyor chain, etc. The hard material can provide structure or mechanical strength to name a few features.
REGION ON THERMOPLASTIC SUBSTRATE
Background Of The Invention [0003] It is often desirable to manufacture a single component which has the hardness and frictional properties of a thermoplastic etastotneric material in one region and the hardness and frictional properties of another thermoplastic material in other regions. For example, the thermoplastic elastomeric material may provide functions such as a built in gasket, or soft grip for "non-slip" handling, or skid free standing plane, or a high friction top to a modular belt or conveyor chain. The harder thermoplastic material can provide structure or mechanical strength to the component. In one example application, a thermoplastic elastomer, such a styrenic block copolymer, is laminated to a hard resin. The laminate is advantageous since it has a good feel, shock absorption (cushionability) and damage-resistance because of the flexibility and elasticity of the layer of the thermoplastic elastomer and has shape-retaining and reinforcing ability because of the hard resin.
[0004] While composites of a thermoplastic elastomer and a hard resin often have advantageous properties, it may be difficult to create an acceptable bond between the thermoplastic elastomer=and the hard resin. Often mechanical coupling methods must be employed in which the thermoplastic elastomer and the hard resin are formed to have engaging means capable of being coupled together.. However, the formation of engaging means typically require molds with complicated structures for forming the engaging means.
Alternatively, the thermoplastic elastomer and the hard resin are often bonded together with some other bonding means, such as adhesives. The use of adhesives is also undesirable because it requires complicated steps to prepare the two layers followed by bonding. As a result, poorly-bonded composites are often produced, and organic solvents in adhesives often are detrimental in the working environment.
[0005] What is needed therefore is a method and materials wherein a thermoplastic elastomeric material can be readily molded to another harder thermoplastic material such that an acceptable bond forms between the thermoplastic elastomer and the harder thermoplastic material.
Summary Of The Invention [0006] The present invention provides a formulation to attach a thermoplastic material comprising a thermoplastic urethane to a thermoplastic alloy of a polyester and a polycarbonate. In one form, the thermoplastic material includes a styrenic thermoplastic elastomer and the thermoplastic urethane. Molded components can be manufactured using an alloy blend of a polyester and a polycarbonate. Components can then be manufactured which include a significant bond between the thermoplastic alloy of a polyester and a polycarbonate and the thermoplastic material. The materials can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
[0007] One advantage of the invention is to attach a relatively soft thermoplastic material, such as a thermoplastic elastomer, to a significantly harder thermoplastic material. This is advantageous in that a single component can be manufactured which has properties of the soft material in one region or part feature and the properties of the harder material in other regions or part features. The soft material may provide function such as a built in gasket, or soft grip for "non-slip" handling, or skid free standing plane, or a high friction top to a modular belt or conveyor chain, etc. The hard material can provide structure or mechanical strength to name a few features.
According to one aspect of the present invention, there is provided a molded article comprising: a substrate comprising a thermoplastic alloy comprising a polyester and a polycarbonate; and a layer of a thermoplastic material disposed on at least a portion of the substrate, the thermoplastic material consisting essentially of a styrenic thermoplastic elastomer and a thermoplastic polyurethane.
According to another aspect of the present invention, there is provided a method of manufacturing an article, the method comprising:
providing a substrate comprising a thermoplastic alloy comprising a polyester and a polycarbonate; and overmolding a layer of a thermoplastic material consisting essentially of a styrenic thermoplastic elastomer and a thermoplastic polyurethane.
According to yet another aspect of the present invention, there is provided a modular chain link for use in constructing a modular conveyor chain, the modular chain link comprising: a main body comprising a thermoplastic alloy comprising a polyester and a polycarbonate; a layer of a thermoplastic material disposed on at least a portion of the main body, the thermoplastic material comprising a thermoplastic polyurethane; and a plurality of spaced link ends projecting from opposite sides of the main body, the plurality of spaced link ends being adapted to couple with adjacent links for joining the modular chain link together with the adjacent links.
2a [0008] These and still other advantages of the present invention will be apparent from the description which follows. In the detailed description below, preferred embodiments of the invention will be described. These embodiments do not represent the full scope of the invention. Rather the invention may be employed in other embodiments.
Reference should therefore be made to the claims herein for interpreting the breadth of the invention.
Description of the Drawings [0009] Figure 1 is an exploded perspective view of a portion of a modular conveyor chain including a modular chain link formed using the present invention.
Detailed Description Of The Invention [0010] The present invention provides a method for attaching a softer thermoplastic material to a harder thermoplastic material. In one embodiment, a thermoplastic material comprising a thermoplastic polyurethane can be attached to a thermoplastic alloy of a polyester and a polycarbonate. In another embodiment, a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane can be attached to a thermoplastic alloy of a polyester and a polycarbonate. The materials can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
For example, one material can be injection molded (by insert molding or 2-shot), extruded (or co-extruded) or thermally processed in some manner which allows the second material to bond thermally or chemically.
[0011] In one form, the invention provides a molded article including a substrate comprising a thermoplastic alloy including a polyester and a polycarbonate, and a layer of a thermoplastic material disposed on at least a portion of the substrate. The thermoplastic material may comprise a thermoplastic polyurethane, or a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane. Optionally, the thermoplastic material may consist essentially of the thermoplastic polyurethane.
Optionally, the thermoplastic elastomer alloy may consist essentially of the styrenic thermoplastic elastomer and the thermoplastic polyurethane.
[0012) The styrenic thermoplastic elastomer is preferably a styrenic block copolymer.
Non-limiting examples of styrenic block copolymers include styrene-butadiene-styrene (SBS) copolymers, styrene-isoprene-styrene (SIS) copolymers, styrene-ethylene/butylene-styrene (SEBS) copolymers, and styrene-ethylenelpropylene-styrene (SEPS) copolymers.
In one example form of the invention, the styrenic block copolymer is selected from st ne-yre etbLylene/butylene-styrene copolymers.
[0013] The polyurethane has no limitation in respect of its formulation other than the requirement that it be thermoplastic in nature. Such thermoplastic polyurethane compositions are generally referred to as TPU materials, and any TPU materials that are compatible with the styrenic thermoplastic elastomer can be used in the thermoplastic elastomer alloy of the present invention. For particular teachings on various TPU materials and their preparation, see U.S. Patent Nos. 2,929,800; 2,948,691; 3,493,634; 3,620,905; 3,642,964;
3,963,679;
According to another aspect of the present invention, there is provided a method of manufacturing an article, the method comprising:
providing a substrate comprising a thermoplastic alloy comprising a polyester and a polycarbonate; and overmolding a layer of a thermoplastic material consisting essentially of a styrenic thermoplastic elastomer and a thermoplastic polyurethane.
According to yet another aspect of the present invention, there is provided a modular chain link for use in constructing a modular conveyor chain, the modular chain link comprising: a main body comprising a thermoplastic alloy comprising a polyester and a polycarbonate; a layer of a thermoplastic material disposed on at least a portion of the main body, the thermoplastic material comprising a thermoplastic polyurethane; and a plurality of spaced link ends projecting from opposite sides of the main body, the plurality of spaced link ends being adapted to couple with adjacent links for joining the modular chain link together with the adjacent links.
2a [0008] These and still other advantages of the present invention will be apparent from the description which follows. In the detailed description below, preferred embodiments of the invention will be described. These embodiments do not represent the full scope of the invention. Rather the invention may be employed in other embodiments.
Reference should therefore be made to the claims herein for interpreting the breadth of the invention.
Description of the Drawings [0009] Figure 1 is an exploded perspective view of a portion of a modular conveyor chain including a modular chain link formed using the present invention.
Detailed Description Of The Invention [0010] The present invention provides a method for attaching a softer thermoplastic material to a harder thermoplastic material. In one embodiment, a thermoplastic material comprising a thermoplastic polyurethane can be attached to a thermoplastic alloy of a polyester and a polycarbonate. In another embodiment, a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane can be attached to a thermoplastic alloy of a polyester and a polycarbonate. The materials can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
For example, one material can be injection molded (by insert molding or 2-shot), extruded (or co-extruded) or thermally processed in some manner which allows the second material to bond thermally or chemically.
[0011] In one form, the invention provides a molded article including a substrate comprising a thermoplastic alloy including a polyester and a polycarbonate, and a layer of a thermoplastic material disposed on at least a portion of the substrate. The thermoplastic material may comprise a thermoplastic polyurethane, or a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane. Optionally, the thermoplastic material may consist essentially of the thermoplastic polyurethane.
Optionally, the thermoplastic elastomer alloy may consist essentially of the styrenic thermoplastic elastomer and the thermoplastic polyurethane.
[0012) The styrenic thermoplastic elastomer is preferably a styrenic block copolymer.
Non-limiting examples of styrenic block copolymers include styrene-butadiene-styrene (SBS) copolymers, styrene-isoprene-styrene (SIS) copolymers, styrene-ethylene/butylene-styrene (SEBS) copolymers, and styrene-ethylenelpropylene-styrene (SEPS) copolymers.
In one example form of the invention, the styrenic block copolymer is selected from st ne-yre etbLylene/butylene-styrene copolymers.
[0013] The polyurethane has no limitation in respect of its formulation other than the requirement that it be thermoplastic in nature. Such thermoplastic polyurethane compositions are generally referred to as TPU materials, and any TPU materials that are compatible with the styrenic thermoplastic elastomer can be used in the thermoplastic elastomer alloy of the present invention. For particular teachings on various TPU materials and their preparation, see U.S. Patent Nos. 2,929,800; 2,948,691; 3,493,634; 3,620,905; 3,642,964;
3,963,679;
4,131,604; 4,169,196; Re 31,671; 4,245,081; 4,371,684; 4,379,904; 4,447,590;
4,523,005;
4,621,113; and 4,631,329.
[0014] Thermoplastic elastomer alloys including a styrenic thermoplastic elastomer and a thermoplastic polyurethane are commercially available. One preferred thermoplastic elastomer alloy for use in the present invention is an SEES/Urethane TPE/TPU
alloy sold under the designation VersaflexTM OM 1245X-I by GLS Corporation, McHenry, Illinois, USA. When attached to the thermoplastic alloy substrate, the thermoplastic elastomer alloy has a hardness in the range of 40-70 Shore A as measured using the procedures of ASTM
D2240. The hardness selected for the thermoplastic elastomer alloy is typically lower than that of the thermoplastic alloy substrate.
(0015] The polyester used in the thermoplastic alloy comprising the substrate is typically the reaction product of a polyhydric alcohol and a polycarboxylic acid. For example, the polyester may be the reaction product of an allcanediol and terephthalic acid.
Preferably, the polyester is selected from polyethylene terephthalate and polybutylene terephthalate, and most preferably, the polyester is polybutylene terephthalate.
[0016] The polycarbonate used in the thermoplastic alloy comprising the substrate is typically is a bisphenol-A polycarbonate. Most preferably, the polycarbonate is the reaction product of bisphenol-A and diphenyl carbonate.
[0017] Thermoplastic alloys including a polyester and a polycarbonate are commercially available. Several preferred thermoplastic alloys for use in the substrate of the present invention are sold under the designation XenoyTM by General Electric Plastics, Pittsfield, Massachusetts, USA. One preferred thermoplastic alloy for use in the substrate of the present invention is sold under the designation XenoyTM 1200 and comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). Typically, the bisphenol-A
polycarbonate is the reaction product of bisphenol-A and a carbonate diester such as diphenyl carbonate.
[0018] The thermoplastic material comprising a thermoplastic polyurethane, or the thermoplastic material comprising a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane may be attached to the thermoplastic alloy substrate using conventional methods. The materials"can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
Examples of co-extrusion methods and equipment can be found in U.S. Patent Nos.
4,405,547, 4,054,403 and 3,649,143. In an injection molding process, an article having thermoplastic elastomer alloy and the thermoplastic material laminated layers is constructed by first injection molding the hard thermoplastic alloy into a suitable mold, and then forming an outer surface portion by injecting the soft thermoplastic material onto a portion of the hard thermoplastic alloy.
Another method comprises constructing each of the layers separately, and one surface of the soft thermoplastic material portion is then fastened by cementing (e.g., by an adhesive) to the complementing surface of the hard thermoplastic alloy. In the version of the invention using a thermoplastic material comprising a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane, there may be a significant advantage to having either the styrenic thermoplastic elastomer phase or the thermoplastic polyurethane phase of the thermoplastic elastomer alloy as large as possible in order to increase the bond strength with the substrate.
[0019] With respect to the substrate, polycarbonates may not be a very good material for making certain components. For instance, polycarbonates are not very good materials for making conveyor chain or modular belting. Polycarbonate is an amorphous material which does not have very good mechanical properties, especially fatigue resistance, which is required for a conveyor chain application. Polybutylene terephthalate;
however, is highly crystalline and is well known to be a good chain material. Thus, there may be a significant advantage to having either the polyester phase or the polycarbonate phase in the thermoplastic alloy as large as possible. In the thermoplastic alloy of a polyester and a polycarbonate, it is recognized that increasing the amount of polycarbonate may significantly reduce the mechanical properties of the material. However, adjusting the block length of the polycarbonate in the thermoplastic alloy of the polyester and the polycarbonate may allow a larger region for the polycarbonate phase in the thermoplastic alloy to attach to the thermoplastic material. Likewise, larger polycarbonate regions or phases in the thermoplastic alloy of a polyester and a polycarbonate may allow for better places to attach to the thermoplastic urethane or the thermoplastic urethane of the thermoplastic elastomer alloy.
[0020] In one application, one or more of the modular chain links of a modular conveyor chain can be formed using the present invention. A portion of a modular conveyor chain is shown in Figure 1. A modular chain link 13 formed using the present invention is shown intermeshed with a conventional adjacent chain link 15. A connector pin 17 pivotally connects the chain link 13 with the adjacent chain link 15.
[0021] The chain link 13 includes a link body 16 and a layer 99 disposed on the top of the link body 16. The link body 16 is formed from any of the thermoplastic alloy substrate materials described above such as the materials including a polyester and a polycarbonate. A
preferred thermoplastic alloy for use in the link body 16 is sold under the designation XenoyTM 1200 and comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). Typically, the bisphenol-A polycarbonate is the reaction product of bisphenol-A and a carbonate diester such as diphenyl carbonate. The top layer 99 is formed from any of the thermoplastic materials described above such as the materials including a thermoplastic polyurethane or a styrenic thermoplastic elastomer and a thermoplastic polyurethane. One preferred thermoplastic material for use in the top layer 99 is an SEBS/Urethane TPE/TPU alloy sold under the designation VersaflexTM OM 1245X-1 by GLS Corporation, McHenry, Illinois, USA. The link body 16 and the top layer 99 may be attached using the conventional methods (i.e., injection molding, extrusion, cementing) described above. When attached to the link body 16, the top layer 99 has a hardness in the range of 40-70 Shore A as measured using the procedures of ASTM D2240. The hardness selected for the top layer 99 is typically lower than that of the link body 16.
[0022] The link body 16 includes a series of link ends 25 extending from opposite sides of the link body 16. The link ends 25 are transversely spaced from each other to define therebetween a series of spaces 27. The series of link ends 25 include openings 33 that are axially aligned with respect to each other. The openings 33 in the link ends 25 can be cylindrical or elongated in the direction of travel of the modular conveyor belt.
[0023] The adjacent chain link 15 is preferably the same general shape as the chain link 13. The adjacent chain link 15 also includes a series of link ends 65 that are axially spaced from each other to define a series of spaces 67. The series of spaces 67 are adapted to receive the series of link ends 25 located on one side of the chain link 13. The link ends 65 extend into the spaces 27 between the link ends 25 of the chain link 13. The link ends 65 in the adjacent link 15 also include openings 69 that are axially aligned with respect to each other as well as the openings 33 in chain link 13 when the adjacent link 15 is assembled to the chain link 13. The openings 69 may be cylindrical or elongated in the travel direction of the modular conveyor chain.
Example [0024] Experiments were conducted with bonding a thermoplastic elastomer alloy (SEBS/Urethane TPE/TPU) sold under the designation VersaflexTM OM 1245X-1 by GLS
Corporation, McHenry, Illinois, USA and a thermoplastic alloy sold under the designation XenoyTM 1200, which comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). The results were very positive in that they showed good adhesion between these two materials. Thus, it is possible to chemically bond a SEBS/Urethane based TPE/TPU alloy to a polycarbonate/PBT substrate. It is known that PC/PBT alloys have some unique properties which have a wide variety of applications.
Alloying PC-and PBT bring chemical resistance, thermal stability, and mechanical properties from the crystalline PBT component along with the toughness of the PC
component.
Bonding a soft material to this alloy has market value not only for conveyor chains, but also for a wide variety of other products such as power tool housings, automotive components, household appliances, and the like.
[0025] Therefore, the present invention provides a method and materials wherein a softer thermoplastic material can be readily molded to another harder thermoplastic material such that an acceptable bond forms between the softer thermoplastic material and the harder thermoplastic material. In particular, the invention provides 'a method and materials wherein a layer of a thermoplastic material comprising a thermoplastic polyurethane or a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane can be attached to a substrate comprising a thermoplastic alloy including a polyester and a polycarbonate.
[0026] While there has been shown and described what are at present considered the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention defined by the appended claims.
4,523,005;
4,621,113; and 4,631,329.
[0014] Thermoplastic elastomer alloys including a styrenic thermoplastic elastomer and a thermoplastic polyurethane are commercially available. One preferred thermoplastic elastomer alloy for use in the present invention is an SEES/Urethane TPE/TPU
alloy sold under the designation VersaflexTM OM 1245X-I by GLS Corporation, McHenry, Illinois, USA. When attached to the thermoplastic alloy substrate, the thermoplastic elastomer alloy has a hardness in the range of 40-70 Shore A as measured using the procedures of ASTM
D2240. The hardness selected for the thermoplastic elastomer alloy is typically lower than that of the thermoplastic alloy substrate.
(0015] The polyester used in the thermoplastic alloy comprising the substrate is typically the reaction product of a polyhydric alcohol and a polycarboxylic acid. For example, the polyester may be the reaction product of an allcanediol and terephthalic acid.
Preferably, the polyester is selected from polyethylene terephthalate and polybutylene terephthalate, and most preferably, the polyester is polybutylene terephthalate.
[0016] The polycarbonate used in the thermoplastic alloy comprising the substrate is typically is a bisphenol-A polycarbonate. Most preferably, the polycarbonate is the reaction product of bisphenol-A and diphenyl carbonate.
[0017] Thermoplastic alloys including a polyester and a polycarbonate are commercially available. Several preferred thermoplastic alloys for use in the substrate of the present invention are sold under the designation XenoyTM by General Electric Plastics, Pittsfield, Massachusetts, USA. One preferred thermoplastic alloy for use in the substrate of the present invention is sold under the designation XenoyTM 1200 and comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). Typically, the bisphenol-A
polycarbonate is the reaction product of bisphenol-A and a carbonate diester such as diphenyl carbonate.
[0018] The thermoplastic material comprising a thermoplastic polyurethane, or the thermoplastic material comprising a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane may be attached to the thermoplastic alloy substrate using conventional methods. The materials"can be attached by a process such as injection molding, extrusion, or another process known in the art for processing thermoplastics including multi-barrel injection molding and co-extrusion.
Examples of co-extrusion methods and equipment can be found in U.S. Patent Nos.
4,405,547, 4,054,403 and 3,649,143. In an injection molding process, an article having thermoplastic elastomer alloy and the thermoplastic material laminated layers is constructed by first injection molding the hard thermoplastic alloy into a suitable mold, and then forming an outer surface portion by injecting the soft thermoplastic material onto a portion of the hard thermoplastic alloy.
Another method comprises constructing each of the layers separately, and one surface of the soft thermoplastic material portion is then fastened by cementing (e.g., by an adhesive) to the complementing surface of the hard thermoplastic alloy. In the version of the invention using a thermoplastic material comprising a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and the thermoplastic polyurethane, there may be a significant advantage to having either the styrenic thermoplastic elastomer phase or the thermoplastic polyurethane phase of the thermoplastic elastomer alloy as large as possible in order to increase the bond strength with the substrate.
[0019] With respect to the substrate, polycarbonates may not be a very good material for making certain components. For instance, polycarbonates are not very good materials for making conveyor chain or modular belting. Polycarbonate is an amorphous material which does not have very good mechanical properties, especially fatigue resistance, which is required for a conveyor chain application. Polybutylene terephthalate;
however, is highly crystalline and is well known to be a good chain material. Thus, there may be a significant advantage to having either the polyester phase or the polycarbonate phase in the thermoplastic alloy as large as possible. In the thermoplastic alloy of a polyester and a polycarbonate, it is recognized that increasing the amount of polycarbonate may significantly reduce the mechanical properties of the material. However, adjusting the block length of the polycarbonate in the thermoplastic alloy of the polyester and the polycarbonate may allow a larger region for the polycarbonate phase in the thermoplastic alloy to attach to the thermoplastic material. Likewise, larger polycarbonate regions or phases in the thermoplastic alloy of a polyester and a polycarbonate may allow for better places to attach to the thermoplastic urethane or the thermoplastic urethane of the thermoplastic elastomer alloy.
[0020] In one application, one or more of the modular chain links of a modular conveyor chain can be formed using the present invention. A portion of a modular conveyor chain is shown in Figure 1. A modular chain link 13 formed using the present invention is shown intermeshed with a conventional adjacent chain link 15. A connector pin 17 pivotally connects the chain link 13 with the adjacent chain link 15.
[0021] The chain link 13 includes a link body 16 and a layer 99 disposed on the top of the link body 16. The link body 16 is formed from any of the thermoplastic alloy substrate materials described above such as the materials including a polyester and a polycarbonate. A
preferred thermoplastic alloy for use in the link body 16 is sold under the designation XenoyTM 1200 and comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). Typically, the bisphenol-A polycarbonate is the reaction product of bisphenol-A and a carbonate diester such as diphenyl carbonate. The top layer 99 is formed from any of the thermoplastic materials described above such as the materials including a thermoplastic polyurethane or a styrenic thermoplastic elastomer and a thermoplastic polyurethane. One preferred thermoplastic material for use in the top layer 99 is an SEBS/Urethane TPE/TPU alloy sold under the designation VersaflexTM OM 1245X-1 by GLS Corporation, McHenry, Illinois, USA. The link body 16 and the top layer 99 may be attached using the conventional methods (i.e., injection molding, extrusion, cementing) described above. When attached to the link body 16, the top layer 99 has a hardness in the range of 40-70 Shore A as measured using the procedures of ASTM D2240. The hardness selected for the top layer 99 is typically lower than that of the link body 16.
[0022] The link body 16 includes a series of link ends 25 extending from opposite sides of the link body 16. The link ends 25 are transversely spaced from each other to define therebetween a series of spaces 27. The series of link ends 25 include openings 33 that are axially aligned with respect to each other. The openings 33 in the link ends 25 can be cylindrical or elongated in the direction of travel of the modular conveyor belt.
[0023] The adjacent chain link 15 is preferably the same general shape as the chain link 13. The adjacent chain link 15 also includes a series of link ends 65 that are axially spaced from each other to define a series of spaces 67. The series of spaces 67 are adapted to receive the series of link ends 25 located on one side of the chain link 13. The link ends 65 extend into the spaces 27 between the link ends 25 of the chain link 13. The link ends 65 in the adjacent link 15 also include openings 69 that are axially aligned with respect to each other as well as the openings 33 in chain link 13 when the adjacent link 15 is assembled to the chain link 13. The openings 69 may be cylindrical or elongated in the travel direction of the modular conveyor chain.
Example [0024] Experiments were conducted with bonding a thermoplastic elastomer alloy (SEBS/Urethane TPE/TPU) sold under the designation VersaflexTM OM 1245X-1 by GLS
Corporation, McHenry, Illinois, USA and a thermoplastic alloy sold under the designation XenoyTM 1200, which comprises an alloy of polybutylene terephthalate (PBT) and a bisphenol-A polycarbonate (PC). The results were very positive in that they showed good adhesion between these two materials. Thus, it is possible to chemically bond a SEBS/Urethane based TPE/TPU alloy to a polycarbonate/PBT substrate. It is known that PC/PBT alloys have some unique properties which have a wide variety of applications.
Alloying PC-and PBT bring chemical resistance, thermal stability, and mechanical properties from the crystalline PBT component along with the toughness of the PC
component.
Bonding a soft material to this alloy has market value not only for conveyor chains, but also for a wide variety of other products such as power tool housings, automotive components, household appliances, and the like.
[0025] Therefore, the present invention provides a method and materials wherein a softer thermoplastic material can be readily molded to another harder thermoplastic material such that an acceptable bond forms between the softer thermoplastic material and the harder thermoplastic material. In particular, the invention provides 'a method and materials wherein a layer of a thermoplastic material comprising a thermoplastic polyurethane or a thermoplastic elastomer alloy including a styrenic thermoplastic elastomer and a thermoplastic polyurethane can be attached to a substrate comprising a thermoplastic alloy including a polyester and a polycarbonate.
[0026] While there has been shown and described what are at present considered the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention defined by the appended claims.
Claims (19)
1. A modular chain link for use in constructing a modular conveyor chain, the modular chain link comprising:
a main body comprising a thermoplastic alloy comprising a polyester and a polycarbonate;
a layer of a thermoplastic material disposed on at least a portion of the main body, the thermoplastic material comprising a thermoplastic polyurethane;
and a plurality of spaced link ends projecting from opposite sides of the main body, the plurality of spaced link ends being adapted to couple with adjacent links for joining the modular chain link together with the adjacent links.
a main body comprising a thermoplastic alloy comprising a polyester and a polycarbonate;
a layer of a thermoplastic material disposed on at least a portion of the main body, the thermoplastic material comprising a thermoplastic polyurethane;
and a plurality of spaced link ends projecting from opposite sides of the main body, the plurality of spaced link ends being adapted to couple with adjacent links for joining the modular chain link together with the adjacent links.
2. The modular chain link of claim 1, wherein:
the thermoplastic material is a thermoplastic elastomer alloy comprising a styrenic thermoplastic elastomer and the thermoplastic polyurethane.
the thermoplastic material is a thermoplastic elastomer alloy comprising a styrenic thermoplastic elastomer and the thermoplastic polyurethane.
3. The modular chain link of claim 2, wherein:
the styrenic thermoplastic elastomer is a styrenic block copolymer.
the styrenic thermoplastic elastomer is a styrenic block copolymer.
4. The modular chain link of claim 2, wherein:
the styrenic block copolymer is selected from the group consisting of styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-ethylene/butylene-styrene copolymers, and styrene-ethylene/propylene-styrene copolymers.
the styrenic block copolymer is selected from the group consisting of styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-ethylene/butylene-styrene copolymers, and styrene-ethylene/propylene-styrene copolymers.
5. The modular chain link of claim 2, wherein:
the styrenic block copolymer is selected from the group consisting of styrene-ethylene/butylene-styrene copolymers.
the styrenic block copolymer is selected from the group consisting of styrene-ethylene/butylene-styrene copolymers.
6. The modular chain link of claim 2, wherein:
the thermoplastic elastomer alloy consists essentially of the styrenic thermoplastic elastomer and the thermoplastic polyurethane.
the thermoplastic elastomer alloy consists essentially of the styrenic thermoplastic elastomer and the thermoplastic polyurethane.
7. The modular chain link of claim 2, wherein:
the thermoplastic elastomer alloy consists essentially of (i) a styrenic block copolymer selected from the group consisting of styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-ethylene/butylene-styrene copolymers, and styrene-ethylene/propylene-styrene copolymers, and (ii) the thermoplastic polyurethane.
the thermoplastic elastomer alloy consists essentially of (i) a styrenic block copolymer selected from the group consisting of styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-ethylene/butylene-styrene copolymers, and styrene-ethylene/propylene-styrene copolymers, and (ii) the thermoplastic polyurethane.
8. The modular chain link of claim 2, wherein:
the thermoplastic elastomer alloy consists essentially of (i) a styrene-ethylene/butylene-styrene copolymer, and (ii) the thermoplastic polyurethane.
the thermoplastic elastomer alloy consists essentially of (i) a styrene-ethylene/butylene-styrene copolymer, and (ii) the thermoplastic polyurethane.
9. The modular chain link of claim 1, wherein:
the polyester is the reaction product of a polyhydric alcohol and a polycarboxylic acid.
the polyester is the reaction product of a polyhydric alcohol and a polycarboxylic acid.
10. The modular chain link of claim 1, wherein:
the polyester is the reaction product of an alkanediol and terephthalic acid.
the polyester is the reaction product of an alkanediol and terephthalic acid.
11. The modular chain link of claim 1, wherein:
the polyester is selected from the group consisting of polyethylene terephthalate and polybutylene terephthalate.
the polyester is selected from the group consisting of polyethylene terephthalate and polybutylene terephthalate.
12. The modular chain link of claim 1, wherein:
the polyester is polybutylene terephthalate.
the polyester is polybutylene terephthalate.
13. The modular chain link of claim 1, wherein:
the polycarbonate is bisphenol-A polycarbonate.
the polycarbonate is bisphenol-A polycarbonate.
14. The modular chain link of claim 1, wherein:
the polycarbonate is the reaction product of bisphenol-A and diphenyl carbonate.
the polycarbonate is the reaction product of bisphenol-A and diphenyl carbonate.
15. The modular chain link of claim 1, wherein:
the thermoplastic alloy comprises polybutylene terephthalate and a bisphenol-A polycarbonate.
the thermoplastic alloy comprises polybutylene terephthalate and a bisphenol-A polycarbonate.
16. The modular chain link of claim 1, wherein:
the thermoplastic alloy consists essentially of the polyester and the polycarbonate.
the thermoplastic alloy consists essentially of the polyester and the polycarbonate.
17. The modular chain link of claim 1, wherein:
the thermoplastic alloy consists essentially of polybutylene terephthalate and a bisphenol-A polycarbonate.
the thermoplastic alloy consists essentially of polybutylene terephthalate and a bisphenol-A polycarbonate.
18. The modular chain link of claim 1, wherein:
the layer of the thermoplastic material has a hardness in the range of 40-70 Shore A.
the layer of the thermoplastic material has a hardness in the range of 40-70 Shore A.
19. The modular chain link of claim 1, wherein:
the body has a higher hardness than the layer.
the body has a higher hardness than the layer.
Applications Claiming Priority (5)
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|---|---|---|---|
| US41431202P | 2002-09-27 | 2002-09-27 | |
| US60/414,312 | 2002-09-27 | ||
| US10/628,932 US7132167B2 (en) | 2002-09-27 | 2003-07-29 | Composite article having thermoplastic elastomer region on thermoplastic substrate |
| US10/628,932 | 2003-07-29 | ||
| PCT/US2003/030343 WO2004028801A1 (en) | 2002-09-27 | 2003-09-25 | Composite article having thermoplastic elastomer region on thermoplastic substrate |
Publications (2)
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| CA2500013A1 CA2500013A1 (en) | 2004-04-08 |
| CA2500013C true CA2500013C (en) | 2012-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2500013 Expired - Lifetime CA2500013C (en) | 2002-09-27 | 2003-09-25 | Composite article having thermoplastic elastomer region on thermoplastic substrate |
Country Status (9)
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| US (1) | US7132167B2 (en) |
| EP (1) | EP1549492B1 (en) |
| JP (1) | JP4431499B2 (en) |
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| AU (1) | AU2003272700B2 (en) |
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| CA (1) | CA2500013C (en) |
| MX (1) | MXPA05003224A (en) |
| WO (1) | WO2004028801A1 (en) |
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| US7985365B2 (en) * | 2003-09-18 | 2011-07-26 | Cooperative Research Centre For Advanced Composite Structures Limited | Functional surface shaping techniques for polymer composite components |
| US7987526B2 (en) * | 2007-04-13 | 2011-08-02 | Fox Head, Inc. | Protective gear for the body and methods of making the same |
| US8409698B2 (en) * | 2007-11-30 | 2013-04-02 | Day International, Inc. | Image transfer product including a thin printing surface layer |
| CN106457789A (en) | 2014-04-29 | 2017-02-22 | 纳幕尔杜邦公司 | Photovoltaic cells with improved multilayer backsheet |
| WO2019192958A1 (en) * | 2018-04-03 | 2019-10-10 | Dsm Ip Assets B.V. | Modular conveyor belt |
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-
2003
- 2003-07-29 US US10/628,932 patent/US7132167B2/en not_active Expired - Lifetime
- 2003-09-25 CA CA 2500013 patent/CA2500013C/en not_active Expired - Lifetime
- 2003-09-25 JP JP2004539941A patent/JP4431499B2/en not_active Expired - Lifetime
- 2003-09-25 AU AU2003272700A patent/AU2003272700B2/en not_active Expired
- 2003-09-25 BR BR0314684A patent/BR0314684B8/en active IP Right Grant
- 2003-09-25 MX MXPA05003224A patent/MXPA05003224A/en active IP Right Grant
- 2003-09-25 KR KR1020057005311A patent/KR101057855B1/en active IP Right Grant
- 2003-09-25 EP EP03754900.3A patent/EP1549492B1/en not_active Expired - Lifetime
- 2003-09-25 WO PCT/US2003/030343 patent/WO2004028801A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| BR0314684B1 (en) | 2015-03-10 |
| BR0314684A (en) | 2005-08-02 |
| KR101057855B1 (en) | 2011-08-19 |
| WO2004028801A1 (en) | 2004-04-08 |
| JP2006517154A (en) | 2006-07-20 |
| MXPA05003224A (en) | 2005-06-08 |
| US7132167B2 (en) | 2006-11-07 |
| AU2003272700B2 (en) | 2008-10-30 |
| US20050074620A1 (en) | 2005-04-07 |
| JP4431499B2 (en) | 2010-03-17 |
| CA2500013A1 (en) | 2004-04-08 |
| EP1549492B1 (en) | 2013-07-17 |
| BR0314684B8 (en) | 2015-04-14 |
| AU2003272700A1 (en) | 2004-04-19 |
| KR20050057596A (en) | 2005-06-16 |
| EP1549492A1 (en) | 2005-07-06 |
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