CN101965122B - Magnetic multi-wall heat shrinkable tube and manufacturing method thereof - Google Patents
Magnetic multi-wall heat shrinkable tube and manufacturing method thereof Download PDFInfo
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- CN101965122B CN101965122B CN200910160978.3A CN200910160978A CN101965122B CN 101965122 B CN101965122 B CN 101965122B CN 200910160978 A CN200910160978 A CN 200910160978A CN 101965122 B CN101965122 B CN 101965122B
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Abstract
The invention discloses a magnetic multi-wall heat shrinkable tube and a manufacturing method thereof to overcome the defects of time and energy waste, low production efficiency and high manufacturing cost when an electromagnetic component is subjected to magnetic shielding. The invention discloses a material component formula of the magnetic multi-wall heat shrinkable tube and the manufacturing method thereof, which are characterized in that: magnetic powder is added into the material formula of the heat shrinkable tube to ensure that the heat shrinkable tube has permeability. By using the magnetic multi-wall heat shrinkable tube provided by the invention, an outermost wall layer is made from the non-magnetic or low magnetic material, and at least one inner wall layer is made from the high magnetic material, so that the magnetic multi-wall heat shrinkable tube has the advantages of high magnetic shielding performance on the electromagnetic component, simple operation and low manufacturing cost, and meanwhile also can ensure that the outer wall layer meets the strict apparent requirement.
Description
Technical field
The present invention relates to a kind of heat-shrinkable tube, relate in particular to a kind of magnetic multi-wall heat-shrinkable tube and preparation method thereof.
Background technology
As everyone knows, all kinds of electromagnetic elements can produce magnetic field in the time of work, periphery instrument and equipment is affected, these class components and parts are modal inductance, the elements such as transformer, produce in order to reduce electromagnetic element when work the impact that cause in magnetic field, current method is that electromagnetic element is carried out to magnetic screen, be that directly the outer surface at electromagnetic element is coated with the magnetic conduction coating that last layer glue is made, or cover a magnetic conduction cup, with glue, components and parts and the sealing of magnetic conduction cup are fixed up again, because glue curing needs the regular hour, such operation is not only wasted time and energy, and production efficiency is low, manufacturing cost is also high.
Summary of the invention
Waste time and energy in the time that electromagnetism unit device is carried out to magnetic screen in order to solve at present, production efficiency is low, the shortcoming that manufacturing cost is high, the invention discloses a kind of material compositing formula of magnetic multi-wall heat-shrinkable tube and disclose its manufacture method, it is characterized in that adding magnetic to make heat-shrinkable tube there is magnetic conductivity in the material prescription of heat-shrinkable tube, the magnetic multi-wall heat-shrinkable tube that adopts the present invention to propose, outermost parietal layer is that non-magnetic or low magnetic material make and have an inner wall layer at least is to be made up of high magnetic material, both there is thus the magnetic shield performance good to electromagnetic element, and simple to operate, the advantage of low cost of manufacture, can also guarantee that outer wall layer meets strict apparent requirement simultaneously.
The technical solution adopted for the present invention to solve the technical problems: in the time producing magnetic multi-wall heat-shrinkable tube, the apparent requirement of considering outermost parietal layer is generally higher, and add magnetic can cause apparent mass to reduce, therefore outermost parietal layer adopts non magnetic or low magnetic material, in order to ensure good Magnetic Shielding Effectiveness, therefore having an inner wall layer at least is to be made up of high magnetic material;
The material composition of non magnetic parietal layer is the material of producing common heat-shrink tube, is prior art owing to producing common heat-shrinkable T bush, no longer describes in detail herein;
The material composition of magnetic parietal layer comprises must material and can selection material, must comprise thermoplastic resin and magnetic by material, can comprise filler, coupling agent, processing aid, antioxidant, colouring agent by selection material, and material composition is controlled as follows by weight:
100 parts of thermoplastic resins, comprise one or more in ethylene-vinyl acetate copolymer (EVA), ethylene ethyl acrylate copolymer (EEA), low density polyethylene (LDPE) (LDPE), LLDPE (LLDPE);
Magnetic part 10-900 part, magnetic comprises one or more in Fe-Si-Al magnetic, MnZn magnetic or nickel zinc magnetic, produces the desirable low value of low magnetic parietal layer, the desirable high value of high magnetic parietal layer, more than the granularity of magnetic can be chosen 50 orders, the preferably magnetic of 1000 order to 3000 order granularities;
Filler is below 500 parts, and filler comprises one or more in calcium carbonate, aluminium hydroxide, magnesium hydroxide;
Coupling agent can be chosen below 50 parts;
Processing aid ratio can be chosen below 100 parts, and processing aid comprises one or more in dolomol, hard acid zinc;
Antioxidant content can be chosen below 50 parts;
Colorant content can be chosen below 100 parts.
A kind of preparation method of magnetic multi-wall heat-shrinkable tube, comprise and make material, extrusion molding, crosslinked, expansion fixating shape step, wherein make material step and comprise the material of producing the material of non magnetic parietal layer and producing magnetic parietal layer, the flow process of making material comprises batch mixing, extrudes pelletizing; Extrusion molding step is to utilize many extruders and carry out extrusion by independent extruder head, by high magnetic wall layer material for the production of inwall, by non magnetic or low magnetic wall layer material for the production of outer wall; Be cross-linked, expand fixating shape step identical with production common plastics thermal contraction casing tube method.
The invention has the beneficial effects as follows: magnetic multi-wall heat-shrinkable tube is simple to operate to the magnetic screen of electromagnetic element, and production cost is low, and the outer wall of magnetic multi-wall heat-shrinkable tube is non magnetic parietal layer or low magnetic parietal layer, it is apparent can reach very high request.
Embodiment:
A kind of material prescription and preparation method of magnetic multi-wall heat-shrinkable tube are as follows:
The firstth, make the step of material, comprise and produce non magnetic parietal layer and magnetic parietal layer bi-material, non magnetic parietal layer is made material and is no longer described in detail herein, magnetic wall layer material make material step be first batching, material prescription can be controlled as follows: 100 parts of thermoplastic resins comprise one or more in ethylene-vinyl acetate copolymer (EVA), ethylene ethyl acrylate copolymer (EEA), low density polyethylene (LDPE) (LDPE), LLDPE (LLDPE); Magnetic part 10-900 part, produces the desirable low value of low magnetic parietal layer, produces the desirable high value of high magnetic parietal layer, more than the granularity of magnetic can be chosen 50 orders, and the preferably magnetic of 1000 order to 3000 order granularities; Optionally add following material: filler is below 500 parts; Coupling agent can be chosen below 50 parts; Processing aid ratio can be chosen below 100 parts, and processing aid comprises one or more of dolomol, hard acid zinc; Antioxidant content can be chosen below 50 parts; Colorant content can be chosen below 100 parts; Then above-mentioned material is carried out to batch mixing, extrude pelletizing complete make material step produce magnetic wall layer material;
The secondth, extrusion molding step, with reference to the existing method of extruding multi-walled pipes, utilize many extruders and be equipped with extruder head separately and carry out multi-walled pipes extrusion, by high magnetic wall layer material for the production of inwall, and by non magnetic or low magnetic wall layer material for the production of outer wall;
The 3rd is crosslinking Treatment step, utilizes electron accelerator or radiative material to carry out crosslinking with radiation process for producing to the magnetic conduction sleeve pipe of producing in second step and goes out the magnetically-conductive plastic sleeve pipe through crosslinking Treatment;
The 4th is expansion fixating shape step, and first the crosslinked magnetic conduction sleeve pipe that the 3rd step produced heats and expand sizing by dilatation mold and produce magnetically-conductive plastic heat-shrinkable sleeve.
Claims (7)
1. a magnetic multi-wall heat-shrinkable tube, is characterized in that: it has more than two parietal layer and outermost parietal layer is low magnetic parietal layer and to have an inner wall layer at least be high magnetic parietal layer;
In the material of described low magnetic parietal layer, contain indispensability material and alternative material, described indispensability material comprises thermoplastic olefin material and magnetic, and described thermoplastic olefin material content is 100 parts by weight, and described particle content is 10 parts;
In the material of described high magnetic parietal layer, contain indispensability material and alternative material, described indispensability material comprises thermoplastic olefin material and magnetic, and described thermoplastic olefin material content is 100 parts by weight, and described particle content is 900 parts;
Alternative material in described low magnetic parietal layer and high magnetic parietal layer comprises filler, coupling agent, processing aid, antioxidant, colouring agent.
2. a kind of magnetic multi-wall heat-shrinkable tube according to claim 1, is characterized in that: described magnetic comprises one or more in Fe-Si-Al magnetic, MnZn magnetic or nickel zinc magnetic, and granularity is more than 50 orders.
3. a kind of magnetic multi-wall heat-shrinkable tube according to claim 1, is characterized in that: the granularity of described magnetic is 1000 order to 3000 orders.
4. a kind of magnetic multi-wall heat-shrinkable tube according to claim 1, is characterized in that: described thermoplastic olefin material comprises one or more in ethylene-vinyl acetate copolymer (EVA), ethylene ethyl acrylate copolymer (EEA), low density polyethylene (LDPE) (LDPE), LLDPE (LLDPE).
5. a kind of magnetic multi-wall heat-shrinkable tube according to claim 1, is characterized in that: described filler comprises one or more in calcium carbonate, aluminium hydroxide, magnesium hydroxide; Described processing aid comprises one or more in dolomol, hard acid zinc.
6. a kind of magnetic multi-wall heat-shrinkable tube according to claim 5, is characterized in that: described filer content is below 500 parts by weight; Coupling agent content is below 50 parts; Processing aid content is below 100 parts, and antioxidant content is below 50 parts; Colorant content is below 100 parts.
7. a preparation method for magnetic multi-wall heat-shrinkable tube, it comprises following production stage:
The firstth, make the step of material, comprise the material of making of low magnetic parietal layer and high magnetic parietal layer bi-material, make material step and comprise batching, batch mixing, extrude pelletizing flow process, the material prescription wherein limiting by claim 1 is produced low magnetic wall layer material and high magnetic wall layer material;
The secondth, extrusion molding step, utilize many extruders and pass through independent extruder head extrusion, utilize low magnetic wall layer material to produce outer wall by an extruder, and to have an extruder at least be to utilize high magnetic wall layer material to produce inwall, complete thus the production of magnetic multi-wall pipe;
The 3rd is crosslinking Treatment step, utilizes electron accelerator or radiative material to carry out crosslinking with radiation process for producing to the magnetic multi-wall pipe of producing in second step and goes out the magnetic multi-wall pipe through crosslinking Treatment;
The 4th is expansion fixating shape step, and the crosslinked magnetic multi-wall pipe that the 3rd step produced heats, expands sizing, produces thus magnetic multi-wall heat-shrinkable tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160978.3A CN101965122B (en) | 2009-07-25 | 2009-07-25 | Magnetic multi-wall heat shrinkable tube and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160978.3A CN101965122B (en) | 2009-07-25 | 2009-07-25 | Magnetic multi-wall heat shrinkable tube and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN101965122A CN101965122A (en) | 2011-02-02 |
| CN101965122B true CN101965122B (en) | 2014-07-09 |
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| CN200910160978.3A Active CN101965122B (en) | 2009-07-25 | 2009-07-25 | Magnetic multi-wall heat shrinkable tube and manufacturing method thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020802A (en) * | 2010-12-03 | 2011-04-20 | 东莞三联热缩材料有限公司 | Magnetic double-wall heat shrinkage casing |
| CN102020798A (en) * | 2010-12-03 | 2011-04-20 | 东莞三联热缩材料有限公司 | Magnetic single-wall heat shrinkage sleeve |
| CN103342853A (en) * | 2013-07-01 | 2013-10-09 | 江苏达胜热缩材料有限公司 | Novel magnetoconductive double-wall heat-shrinkable tube and preparation method thereof |
| CN103369940A (en) * | 2013-07-01 | 2013-10-23 | 江苏达胜热缩材料有限公司 | Magnetic conduction multi-wall heat-shrinkable tube and production method thereof |
| CN105733205A (en) * | 2016-03-21 | 2016-07-06 | 南通鼎尚电子材料有限公司 | Magnetic PET thermal-shrinkable sleeve |
| CN106084431A (en) * | 2016-06-07 | 2016-11-09 | 深圳市博赛新材有限公司 | A kind of superhard heat-shrinkable T bush material, superhard heat-shrinkable T bush and preparation method thereof |
| CN106317591A (en) * | 2016-08-18 | 2017-01-11 | 苏州泰斯拓伟机电设备有限公司 | Magnetic conductive heat shrink tube and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4699743A (en) * | 1983-01-15 | 1987-10-13 | Fujikura Ltd | Method of recovering a heat shrinkable magnetic shielding article over an electrical component |
| CN1327908A (en) * | 2001-07-05 | 2001-12-26 | 卢沛女 | Method for manufacturing thermally shrinking dual-layer sleeved tube |
| CN1629216A (en) * | 2003-12-16 | 2005-06-22 | 深圳市沃尔热缩材料有限公司 | Halogen-free flame-retardant thermal-shrinkage sleeve materials and sleeve prepared thereby |
| CN1812215A (en) * | 2005-01-25 | 2006-08-02 | 上海翥星电子科技发展有限公司 | Organic material shielded line bunch pipe |
-
2009
- 2009-07-25 CN CN200910160978.3A patent/CN101965122B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4699743A (en) * | 1983-01-15 | 1987-10-13 | Fujikura Ltd | Method of recovering a heat shrinkable magnetic shielding article over an electrical component |
| CN1327908A (en) * | 2001-07-05 | 2001-12-26 | 卢沛女 | Method for manufacturing thermally shrinking dual-layer sleeved tube |
| CN1629216A (en) * | 2003-12-16 | 2005-06-22 | 深圳市沃尔热缩材料有限公司 | Halogen-free flame-retardant thermal-shrinkage sleeve materials and sleeve prepared thereby |
| CN1812215A (en) * | 2005-01-25 | 2006-08-02 | 上海翥星电子科技发展有限公司 | Organic material shielded line bunch pipe |
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| CN101965122A (en) | 2011-02-02 |
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