WO1998055297A1 - Plastic masking cover - Google Patents
Plastic masking cover Download PDFInfo
- Publication number
- WO1998055297A1 WO1998055297A1 PCT/US1998/011721 US9811721W WO9855297A1 WO 1998055297 A1 WO1998055297 A1 WO 1998055297A1 US 9811721 W US9811721 W US 9811721W WO 9855297 A1 WO9855297 A1 WO 9855297A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- density polyethylene
- film
- outer layer
- layer
- combination
- Prior art date
Links
Classifications
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/14—Printing or colouring
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
- B32B2323/043—HDPE, i.e. high density polyethylene
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
- B32B2323/046—LDPE, i.e. low density polyethylene
-
- 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
- B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
- B32B2329/04—Polyvinylalcohol
-
- 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
- B32B2331/00—Polyvinylesters
- B32B2331/04—Polymers of vinyl acetate, e.g. PVA
-
- 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
- B32B2398/00—Unspecified macromolecular compounds
- B32B2398/20—Thermoplastics
Definitions
- the invention relates to protective masking material used in painting, re ⁇
- a paper including coated paper
- this paper is taped to the surface to be protected with an adhesive tape.
- Paper has several disadvantages. First, it has to be coated to make it at least
- Simple commodity plastic covering e.g. polyethylene film (PE) overcomes many of the disadvantages of paper. It is not susceptible to water and is sufficiently
- the substrate In order for a coating to bond initially to a surface such as PE the substrate needs to have a surface energy at least 10 dynes/cm. greater than the surface
- corona discharge is sometimes used. This involves the formation
- corona discharge is flame plasma treatment in which plasma is produced by burning a hydrocarbon fuel
- Ozone treatment either on its own or in combination with corona treatment, also is used to achieve surface oxidation and an increase in surface energy.
- An object of the present invention is to provide an improved masking film
- a masking film in accordance with the present invention comprises at least two and preferably three co-extruded layers, including an inner layer that has enhanced
- binding properties an outer layer which has desirable paint adhesion characteristics and resists paint peeling; and desirably a middle layer which contributes appropriate strength and tear characteristics to the product.
- the film also resists ultraviolet degradation.
- the inner layer of the present invention is a higher density polyethylene
- High density polyethylene (HDPE) at a thickness of about 0.2 to 1.0 mils (about 5 to 25 microns) in a three layer film provides cling and stiffness to the product and resists paint penetration to the covered surface.
- HDPE also has a higher
- melting point (which is desirable when paint is cured by baking) and is less abrasive than other polyethylenes on a car surface.
- the outer layer is formed from a treated polymer having a high surface
- Polymers that have been found to work well include polyvinyl alcohol; polyvinyl acetate; ethylene vinyl alcohol copolymers (of ethylene co-monomer ratios of between 27
- EVA is especially preferred.
- Polyacrylates and polyesters also work but are quite expensive. Even the less expensive materials are more expensive than conventional low density polyethylene. Accordingly, it is preferred that they be used as
- the surface energy of the EVA or other selected polymer is enhanced by applying a surface treatment to the polymer. Specifically, corona discharge on the surface has been used to
- Corona-treated polyoleflns also will work as an outside layer but they are not as satisfactory as EVA and
- HDPE is preferred over lower density polyethylenes.
- a difference in surface energy alone does not appear to explain the superiority of the other polymers.
- the film can be formed with just the outer and inner layers.
- the outer and inner surface layers desirably are co-extruded with a central core layer of a more cost effective material that provides the desired combination of tensile strength, elasticity, and tear strength.
- the use of an inexpensive core layer for strength makes it possible to make the more expensive outer and inner layers thinner.
- the core layer is a thermoplastic
- polymer compatible with the outer and inner layers such as polyethylene or polypropylene, preferably low density polyethylene or a combination of low density polyethylene and linear low density polyethylene.
- cross-directional tear This can be achieved by using the selected polymers in combination
- FIG. 1 is a perspective view of a roll or "log" of masking film.
- FIG. 2 is a cross-sectional view of the masking film.
- plastic masking film 10 comprises an outer layer 12, an inner layer 14 and desirably a core or middle layer 16.
- the inner layer is designed to be applied to the surface 18 of an automobile body or other product being painted.
- Inner layer 14 comprises a higher density polyethylene having good cling properties.
- High density polyethylene (HDPE) having a thickness of about 0.2 to 1.0 mils
- Outer layer 12 provides paint adherence to hold the paint on coatings during spray, curing, and drying without permitting the paint to flake.
- the outer layer preferably is EVA having a thickness of about 0.2 to 0.3 mils (about 5 - 8 microns) in a three layer
- the EVA is treated with a corona discharge treatment in order to enhance the surface energy or surface tension of the outer layer.
- the outer layer as constructed has a surface energy as high as 50 dynes/cm or higher at the time of manufacture, and the surface energy
- the core layer of the structure comprises polyethylene or other polyolefin to give strength to the film.
- a desired core is a combination of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), including some post-consumer recycle material, having a thickness of about 0.2 to 2.0 mils (about 5 to 50 microns).
- LDPE low density polyethylene
- LLDPE linear low density polyethylene
- the tearability of the film from conventional masking paper dispensers also enhances the tearability of the film.
- a filler material such as calcium carbonate, also enhances the tearability of the film.
- the plastic film is extruded to a total thickness of about 0.5 to 3.0
- mils (about 12 to 75 microns) with a thickness of about 1.5 mils (about 50 microns) being desirable.
- the co-extruded film of the present invention provides a combination of
- the film is impervious to the constituents of paints and coatings. It has good handleability, which is provided by a combination of
- the film resists paint flaking while the inner layer enhances the cling of the film to the product being painted.
- the film can simply be laid against the side of the product and it will remain in place for trimming and use.
- the film is thin, easy to handle, and can easily be applied and removed.
- the film of the present invention has sufficient UV resistance that the film resists adverse effects such as "bloom" on the metallic surface in contact with the film when exposed to ultraviolet radiation.
- Another feature of the present invention is the incorporation of a color 24 or printing 26 on at least one side of the material in order to indicate which side of the material is the sticky side and which side is the paint adhesion side. This minimizes the
- Another feature of the present invention is that the film is packaged in logs or rolls that are compatible with the form in which masking paper is presently dispensed.
- Masking paper used in auto body shops typically is packaged in long logs or rolls and mounted on roll dispensers. The paper is torn off the rolls in sheets of any desired length. Many plastic masking materials presently on the market are sold in sheet form of separate
- the present invention permits the plastic masking material to mount on existing paper dispensers and be dispensed in the same manner as the masking paper that body shop operators are already familiar with.
- the masking film of the present invention desirably is formed in rolls 28 that are 18 inches wide and approximately 400 feet in length.
- the film can be folded over once or more on the rolls as shown in FIG. 1 to form folded sheets 20 and 22 in order to
- the outer layer 12 is on the extensior surface of the folded material.
- the rolls can be 36 inches wide (or other widths) and the film can be folded over more than one time to form multiple folded layers.
- the unfolded film width can be as much as eight to twelve feet or any width
- a more narrow width is used for film having a "critical edge", which is an edge that is designed to be adjacent a surface being painted.
- critical edge is an edge that is designed to be adjacent a surface being painted.
- the material, particularly the central core, is fabricated so that the film has good strength in one direction but tears more easily in a transverse direction so the film can more easily be torn off the
Abstract
A plastic masking film comprising at least two layers, an outer layer (12) having sufficent surface energy to ensure the adherence of paint, and an inner layer (14) providing cling to a surface. The outer layer (12) comprises a corona-treated thermoplastic material having a surface energy greater than 50 dynes/cm at the time of manufacture and which remains at a minimum of 35 dynes/cm in use. The thermoplastic material of the outer layer (12) comprises one or a combination of members selected from the group consisting of ethylene/vinyl acetate copolymer, polyvinyl alcohol, polyvinyl acetate, ethylene/vinyl alcohol copolymer, and high density polyethylene. Desirably, the film also includes a central core (16) formed of one or a combination of polyolefins, preferably low-density polyethylene or linear low density polyethylene, compatible with the inner and outer layers. A mineral or other particulate filler can be incorporated in the outer layer (12) to improve the adhesion of paint or coating to the plastic surface.
Description
PLASTIC MASKING COVER CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of co-pending provisional U.S. patent application, serial
no. 60/048,791, filed June 6, 1997. BACKGROUND OF THE INVENTION
The invention relates to protective masking material used in painting, re¬
painting, touching-up or detailing metal and other material surfaces in the automotive, aircraft, marine and other industries. The traditional way to protect a surface from stray and unnecessary paint or other coating materials has been to cover the surface required to
be protected with a paper (including coated paper), generally dispensed from a roll. At the edges this paper is taped to the surface to be protected with an adhesive tape.
Paper has several disadvantages. First, it has to be coated to make it at least
partially impervious to the typical materials used in coating and painting. Second, it is stiff and difficult to maneuver around corners and into position. Further, it is susceptible to humidity and water and thus has problems during wet sanding and accidental exposure to water spraying in repair and body shops. Finally, because paper does not cling to metal or other surfaces, it is difficult to apply. Two hands are necessary to apply it, so one hand is not free for taping.
Simple commodity plastic covering, e.g. polyethylene film (PE), overcomes many of the disadvantages of paper. It is not susceptible to water and is sufficiently
flexible to be maneuverable, but it does not have sufficient cling and suffers from a major
problem because adhesion of paint is poor. Paint that is sprayed on to the polyethylene
surface does not adhere and flakes off after drying, causing problems in the area where the painting is taking place, such as an automotive body shop.
The problem with adhesion to polyethylene is due to the low surface energy
(or surface tension) of unmodified and untreated polyethylenes; typically the surface energy of PE is 29-31 dynes/cm. In order for a coating to bond initially to a surface such as PE the substrate needs to have a surface energy at least 10 dynes/cm. greater than the surface
tension of the liquid. The surface energy of PE is too low for most solvents.
Several methods have been used to overcome the problem of paint flaking. One is to use special plastic materials with higher paint adhesion characteristics.
Unfortunately, only a limited number of plastics are satisfactory, and most are quite expensive. Another method is to add a mineral or filler additive to the plastic to roughen the surface. The effect of additives is limited, however, and they can have an adverse effect on film strength in high concentrations. Some additives, such as slip additives, also can migrate to the film surface over time. In addition to the foregoing, there are several physical and chemical
treatments that can be used to increase the surface energy of a film. For improving the adhesion of printing inks, corona discharge is sometimes used. This involves the formation
of a cold plasma by electrical discharge in atmospheric conditions. Another technique uses
radio frequency or microwave energy under vacuum. An alternative to corona discharge is flame plasma treatment in which plasma is produced by burning a hydrocarbon fuel,
which produces ions, free electrons, carbon atoms and oxygenated carbon and hydrocarbon
molecules. Ozone treatment, either on its own or in combination with corona treatment, also is used to achieve surface oxidation and an increase in surface energy.
An object of the present invention is to provide an improved masking film
that has good paint adhesion characteristics, clings well to the product being painted, and has desirable strength and cost advantages.
SUMMARY OF THE INVENTION
A masking film in accordance with the present invention comprises at least two and preferably three co-extruded layers, including an inner layer that has enhanced
"cling" properties; an outer layer which has desirable paint adhesion characteristics and resists paint peeling; and desirably a middle layer which contributes appropriate strength and tear characteristics to the product. The film also resists ultraviolet degradation.
The inner layer of the present invention is a higher density polyethylene
having good cling properties. High density polyethylene (HDPE) at a thickness of about 0.2 to 1.0 mils (about 5 to 25 microns) in a three layer film provides cling and stiffness to the product and resists paint penetration to the covered surface. HDPE also has a higher
melting point (which is desirable when paint is cured by baking) and is less abrasive than other polyethylenes on a car surface.
The outer layer is formed from a treated polymer having a high surface
energy. Polymers that have been found to work well include polyvinyl alcohol; polyvinyl acetate; ethylene vinyl alcohol copolymers (of ethylene co-monomer ratios of between 27
and 48 percent); and ethylene vinyl acetate or "EVA" (with a vinyl content of between 7
and 28 percent). EVA is especially preferred. Polyacrylates and polyesters also work but
are quite expensive. Even the less expensive materials are more expensive than conventional low density polyethylene. Accordingly, it is preferred that they be used as
a thin layer of about 0.2 to 0.3 mils (about 3 to 25 microns) in a three layer co-extruded
structure. This is sufficient to achieve the required surface effect but is cost effective. The surface energy of the EVA or other selected polymer is enhanced by applying a surface treatment to the polymer. Specifically, corona discharge on the surface has been used to
provide a surface energy of at least 50 dynes/cm. at the time of treatment. Corona-treated polyoleflns also will work as an outside layer but they are not as satisfactory as EVA and
the other polymers. HDPE is preferred over lower density polyethylenes. A difference in surface energy alone does not appear to explain the superiority of the other polymers.
The film can be formed with just the outer and inner layers. However, the outer and inner surface layers desirably are co-extruded with a central core layer of a more cost effective material that provides the desired combination of tensile strength, elasticity, and tear strength. The use of an inexpensive core layer for strength makes it possible to make the more expensive outer and inner layers thinner. The core layer is a thermoplastic
polymer compatible with the outer and inner layers, such as polyethylene or polypropylene, preferably low density polyethylene or a combination of low density polyethylene and linear low density polyethylene. In order to provide a product that can be dispensed
satisfactorily in roll form on a typical masking paper dispenser, a combination of good tensile strength and machine direction tear is necessarily combined with a relatively weak
cross-directional tear. This can be achieved by using the selected polymers in combination
with the processing conditions necessary to provide these characteristics. It has been found
that by using at least 70 percent of a fractional melt index low density polyethylene in the center layer, good strength and tear properties can be produced.
While the individual characteristics of the surface layers is a major factor
in the cling and paint adhesion characteristics of the product, the process of co-extrusion and the combination of materials extruded also influence the characteristics of the final
product. For instance, co-extruding a soft material on a hard material seems to enhance
static energy and cling properties. The use of separate extruders for the separate materials also appears to enhance the cling properties of the product.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a roll or "log" of masking film.
FIG. 2 is a cross-sectional view of the masking film. DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
Referring to the drawings, plastic masking film 10 comprises an outer layer 12, an inner layer 14 and desirably a core or middle layer 16. The inner layer is designed to be applied to the surface 18 of an automobile body or other product being painted. Film
10 is formed in a conventional manner by co-extrusion.
Inner layer 14 comprises a higher density polyethylene having good cling properties. High density polyethylene (HDPE) having a thickness of about 0.2 to 1.0 mils
(about 5 to 25 microns) with a three layer film is satisfactory to provide the necessary surface characteristics and stiffness to the product, while maintaining cost effectiveness by
the use of a thin layer.
Outer layer 12 provides paint adherence to hold the paint on coatings during spray, curing, and drying without permitting the paint to flake. The outer layer preferably is EVA having a thickness of about 0.2 to 0.3 mils (about 5 - 8 microns) in a three layer
film. The EVA is treated with a corona discharge treatment in order to enhance the surface energy or surface tension of the outer layer. The outer layer as constructed has a surface energy as high as 50 dynes/cm or higher at the time of manufacture, and the surface energy
remains at a minimum of 35 dynes per centimeter until use.
The core layer of the structure comprises polyethylene or other polyolefin to give strength to the film.
A desired core is a combination of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), including some post-consumer recycle material, having a thickness of about 0.2 to 2.0 mils (about 5 to 50 microns). The LDPE enhances
the tearability of the film from conventional masking paper dispensers. The use of a filler material, such as calcium carbonate, also enhances the tearability of the film. Overall, the plastic film is extruded to a total thickness of about 0.5 to 3.0
mils, (about 12 to 75 microns) with a thickness of about 1.5 mils (about 50 microns) being desirable.
The co-extruded film of the present invention provides a combination of
qualities necessary for good masking material. The film is impervious to the constituents of paints and coatings. It has good handleability, which is provided by a combination of
polymers which give it the necessary strength, elasticity and tear characteristics. The outer
layer resists paint flaking while the inner layer enhances the cling of the film to the product
being painted. Thus, the film can simply be laid against the side of the product and it will remain in place for trimming and use. The film is thin, easy to handle, and can easily be applied and removed.
Furthermore, the film of the present invention has sufficient UV resistance that the film resists adverse effects such as "bloom" on the metallic surface in contact with the film when exposed to ultraviolet radiation.
Another feature of the present invention is the incorporation of a color 24 or printing 26 on at least one side of the material in order to indicate which side of the material is the sticky side and which side is the paint adhesion side. This minimizes the
risk of misapplication of the film with the wrong side against the surface to be painted.
Another feature of the present invention is that the film is packaged in logs or rolls that are compatible with the form in which masking paper is presently dispensed.
Masking paper used in auto body shops typically is packaged in long logs or rolls and mounted on roll dispensers. The paper is torn off the rolls in sheets of any desired length. Many plastic masking materials presently on the market are sold in sheet form of separate
sheets. The present invention permits the plastic masking material to mount on existing paper dispensers and be dispensed in the same manner as the masking paper that body shop operators are already familiar with.
The masking film of the present invention desirably is formed in rolls 28 that are 18 inches wide and approximately 400 feet in length. The film can be folded over once or more on the rolls as shown in FIG. 1 to form folded sheets 20 and 22 in order to
provide a wider sheet of material. Preferably, the outer layer 12 is on the extensior surface
of the folded material. Alternatively, the rolls can be 36 inches wide (or other widths) and the film can be folded over more than one time to form multiple folded layers. For a full
body cover, the unfolded film width can be as much as eight to twelve feet or any width
desired. A more narrow width is used for film having a "critical edge", which is an edge that is designed to be adjacent a surface being painted. The cling characteristics of the
sheeting are such that the film clings to the surface of the painted product but does not
adhere to itself in a roll with such tenacity that the film cannot be separated. The material, particularly the central core, is fabricated so that the film has good strength in one direction but tears more easily in a transverse direction so the film can more easily be torn off the
roll.
It should be understood that the foregoing is merely illustrative of the preferred practice of the present invention and that various modifications in the details of
the embodiments disclosed herein may be made without departing from the spirit and scope of the present invention.
Claims
1. A plastic masking film comprising at least two layers, an outer layer having
sufficient surface energy to ensure the adherence of paint and an inner layer providing cling
to a surface.
2. A film according to claim 1 in which the outer layer comprises a corona- treated thermoplastic material having a surface with a surface energy greater than 50 dynes/cm. at the time of manufacture and which remains at a minimum of 35 dynes/cm.
until use.
3. A film according to claim 2 in which the thermoplastic material of the outer layer comprises one or a combination of members selected from the group consisting of ethylene vinyl acetate, polyvinyl alcohol, polyvinyl acetate, ethylene vinyl alcohol, and high density polyethylene.
4. A film according to claim 1 in which the inner layer comprises high density
polyethylene.
5. A film according to claim 1 and further comprising a central core layer
formed of one or a combination of polyoleflns compatible with the inner and outer layers.
6. A film according to claim 2 in which a mineral or other particulate filler is incorporated in the outer layer to improve the adhesion of paint or coatings to the plastic
surface.
7. A film according to claim 1 in which at least one of the layers is colored or marked to visually distinguish between the inner and outer layers.
8. A film according to claim 5 wherein the core layer comprises one or a combination of members selected from the group consisting of low density polyethylene and linear low density polyethylene.
9. A plastic masking film comprising at least three co-extruded thermoplastic
layers, an inner layer adapted to contact a product being painted, an outer layer on an opposite exterior surface of the film, and a central core layer between the inner and outer layers, the inner layer comprising high density polyethylene in a thickness of about 0.2 to
1.0 mils (about 5 to 25 microns), the central core layer comprising one or a combination of members formed from the group consisting of low density polyethylene and linear low density polyethylene, the thickness of the inner layer being about 0.2 to 2.0 mils (about 5
to 50 microns), the outer layer comprising a corona-treated material selected from the group consisting of one or a combination of members selected from the group consisting of
ethylene vinyl acetate, polyvinyl alcohol, polyvinyl acetate, ethylene vinyl alcohol, and high
density polyethylene the outer layer being about 0.2 to 0.3 (about 5 to 8 microns) mils thick.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4879197P | 1997-06-06 | 1997-06-06 | |
US60/048,791 | 1997-06-06 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09508028 A-371-Of-International | 2000-10-30 | ||
US10/784,857 Continuation US20040166298A1 (en) | 1997-06-06 | 2004-02-23 | Plastic masking cover |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998055297A1 true WO1998055297A1 (en) | 1998-12-10 |
Family
ID=21956466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/011721 WO1998055297A1 (en) | 1997-06-06 | 1998-06-05 | Plastic masking cover |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1998055297A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1122061A1 (en) * | 2000-02-07 | 2001-08-08 | Atofina | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
EP1122060A1 (en) * | 2000-02-07 | 2001-08-08 | Atofina | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
US20060144499A1 (en) * | 2004-12-01 | 2006-07-06 | Brogan John J | Method and apparatus for producing gloves and boots with a liquid inner coating |
US20070084556A1 (en) * | 2005-10-14 | 2007-04-19 | Langseder Neal E | Method of applying a label to a squeeze tube |
CN103213363A (en) * | 2013-03-19 | 2013-07-24 | 朱义珍 | Agricultural film |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4676376A (en) * | 1985-10-04 | 1987-06-30 | Petoskey Plastics, Inc. | Temporary protective seat cover |
US5113921A (en) * | 1987-11-02 | 1992-05-19 | Minnesota Mining And Manufacturing Company | Sheet material for masking apparatus |
US5194324A (en) * | 1991-12-16 | 1993-03-16 | Mobil Oil Corporation | High gloss label face stock |
US5741389A (en) * | 1996-01-11 | 1998-04-21 | Yoshino Kasei Company Limited | Masking film roll for use in painting, method for producing it, and tubular film from which it is produced |
-
1998
- 1998-06-05 WO PCT/US1998/011721 patent/WO1998055297A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4676376A (en) * | 1985-10-04 | 1987-06-30 | Petoskey Plastics, Inc. | Temporary protective seat cover |
US5113921A (en) * | 1987-11-02 | 1992-05-19 | Minnesota Mining And Manufacturing Company | Sheet material for masking apparatus |
US5194324A (en) * | 1991-12-16 | 1993-03-16 | Mobil Oil Corporation | High gloss label face stock |
US5741389A (en) * | 1996-01-11 | 1998-04-21 | Yoshino Kasei Company Limited | Masking film roll for use in painting, method for producing it, and tubular film from which it is produced |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1122061A1 (en) * | 2000-02-07 | 2001-08-08 | Atofina | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
EP1122060A1 (en) * | 2000-02-07 | 2001-08-08 | Atofina | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
AU756134B2 (en) * | 2000-02-07 | 2003-01-02 | Atofina | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
US7169453B2 (en) | 2000-02-07 | 2007-01-30 | Arkema France | Multilayer structure and tank consisting of this structure, which has a barrier layer in direct contact with the fluid contained |
US20060144499A1 (en) * | 2004-12-01 | 2006-07-06 | Brogan John J | Method and apparatus for producing gloves and boots with a liquid inner coating |
US20070084556A1 (en) * | 2005-10-14 | 2007-04-19 | Langseder Neal E | Method of applying a label to a squeeze tube |
US10351289B2 (en) | 2005-10-14 | 2019-07-16 | Ccl Label, Inc. | Method of producing a squeeze tube with maximally labeled surface area |
CN103213363A (en) * | 2013-03-19 | 2013-07-24 | 朱义珍 | Agricultural film |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4298647A (en) | Cross-tearable decorative sheet material | |
EP2195255B1 (en) | Films. packaging and methods for making them | |
US4380564A (en) | Cross-tearable decorative sheet material | |
EP1503893B1 (en) | Improved adhesive tape for masking | |
EP0578750B1 (en) | Stable pressure sensitive shrink label technique | |
EP0249444B1 (en) | A corrosion, sound, and vibration-proofing method for metal structures | |
AU2010276103B2 (en) | Wrapping an object with a film using a tape for cutting the film | |
US20040166298A1 (en) | Plastic masking cover | |
CA2002297A1 (en) | Masking member | |
US5374482A (en) | Masking tape | |
WO1998055297A1 (en) | Plastic masking cover | |
JP2514899B2 (en) | A masking film roll body for painting, characterized by using a film whose inner surface is treated with corona discharge | |
JP2673667B2 (en) | Masking film roll for painting and method for producing the same | |
JPH0342066A (en) | Masking film for coating | |
WO2011052730A1 (en) | Film for protecting coating film | |
MX2007002129A (en) | Embossed masking sheet with pressure sensitive adhesive regions. | |
US20130130005A1 (en) | Vapor dispersible plastic film with paint adherence & cling | |
JPH08269414A (en) | Surface-protective film | |
KR20090058645A (en) | Covering color tape for painting | |
JP2642565B2 (en) | Masking sheet for painting | |
AU623720B2 (en) | A method of corrosion, sound, and vibration proofing of a metal structure | |
JPH0725962U (en) | Masking film for painting | |
JPH07232421A (en) | Production of laminated film or sheet | |
JP2003047894A (en) | Aging sheet with coating material adsorption auxiliary paper | |
JPH07284704A (en) | Masking film for coating |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA MX US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09508028 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |