CN103342853A - Novel magnetoconductive double-wall heat-shrinkable tube and preparation method thereof - Google Patents
Novel magnetoconductive double-wall heat-shrinkable tube and preparation method thereof Download PDFInfo
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- CN103342853A CN103342853A CN2013102704391A CN201310270439A CN103342853A CN 103342853 A CN103342853 A CN 103342853A CN 2013102704391 A CN2013102704391 A CN 2013102704391A CN 201310270439 A CN201310270439 A CN 201310270439A CN 103342853 A CN103342853 A CN 103342853A
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Abstract
The invention provides a novel magnetoconductive double-wall heat-shrinkable tube which comprises a high-magnetism outer wall layer and an inner wall layer, wherein the high-magnetism outer wall layer material comprises the following components in parts by mass: 50-70 parts of ethylene-vinyl acetate copolymer, 20-40 parts of magnetic powder and 1-20 parts of assistant; the assistant is composed of a flame retardant, a coupling agent and an antioxidant; and the inner wall layer material comprises the following components in parts by mass: 70 parts of ethylene-vinyl acetate copolymer, 20 parts of modified rosin, 7 parts of paraffin and 3 parts of antioxidant. The novel magnetoconductive double-wall heat-shrinkable tube provided by the invention has the advantages of simple preparation process, favorable magnetic conductivity, favorable heat shrinkage and aging resistance.
Description
Technical field
The present invention relates to heat-shrinkable tube, in particular to a kind of magnetic conduction double-wall heat-shrinkable tube and preparation method thereof.
Background technology
All kinds of electromagnetic components can produce magnetic field when work, therefore peripheral plant and instrument is affected, in order to reduce the magnetic field that electromagnetic component produces when working, traditional method is that electromagnetic component is carried out magnetic shielding, directly is coated with exotic materials in the electromagnetic component appearance usually and makes the magnetic conduction coating.But this method not only wastes time and energy, and coating easily comes off, and the magnetic conduction effect is relatively poor; Simultaneously add one deck coating at electromagnetic component, increased production cost.
Summary of the invention
The invention solves deficiency of the prior art, effective and novel magnetic conduction double wall heat draw of being easy to produce of a kind of magnetic conduction and preparation method thereof is provided
Technical scheme of the present invention is: a kind of novel magnetic conduction double wall heat draw, it comprises outer wall layer and the inner wall layer with high magnetic, described high magnetic outer wall layer wall material is by massfraction, its wall material component comprises: 50～70 parts of ethylene vinyl acetates, 20～40 parts of magnetics and 1～20 part of auxiliary agent, and described auxiliary agent is fire retardant, coupling agent and antioxidant; Described inner wall layer wall material is by massfraction, and its wall material component comprises: be made up of 70 parts of ethylene vinyl acetates, 20 parts of modified rosins, 7 parts of paraffin and 3 parts of oxidation inhibitor.
Preferably, described high magnetic outer wall layer wall material is by massfraction, and its wall material component comprises: 60 parts of ethylene vinyl acetates, 30 parts of magnetics and 10 parts of auxiliary agents, and described auxiliary agent is fire retardant, coupling agent and antioxidant; Described inner wall layer wall material is by massfraction, and its wall material component comprises: be made up of 70 parts of ethylene vinyl acetates, 20 parts of modified rosins, 7 parts of paraffin and 3 parts of oxidation inhibitor.
Preferably, described magnetic is a kind of or its mixture in Fe-Si-Al magnetic, ferronickel magnetic or the ferromagnetic oxide powder.
Preferably, described fire retardant is a kind of or its mixture in magnesium hydroxide, aluminium hydroxide and the zinc borate.
Preferably, described coupling agent is silane coupling agent.
More preferably, described coupling agent is vinyltrimethoxy silane.
Preferably, described antioxidant is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
Preferably, prepare a kind of method of the novel magnetic conduction double wall heat draw, may further comprise the steps:
(1) outer wall layer wall material prepares: take by weighing according to each set of dispense ratio in the prescription and get the raw materials ready, described component materials is added in the stirrer, stirring the back adds in the twin-screw mixer machine, under 140～180 ℃ temperature condition, through fully stirring with mixing, rotating speed is transferred to 130r/min, melting temperature is 115～130 ℃, after treating that each component fully merges, obtain outer wall layer wall material through the tablets press granulation, standby;
(2) inner wall layer wall material preparation: according to taking by weighing each component in the prescription, again each component materials is mixed; With the material melting mixing in twin screw extruder that mixes, temperature control below 160 ℃, is obtained inner wall layer wall material;
(3) extrusion moulding: the wall material of preparation in step (1) and the step (2) is added in the forcing machine, extrusion moulding, the outer wall layer material is extruded by different forcing machines with the inner wall layer material herein, cools off then, dries up, and makes magnetic conduction double wall heat draw work in-process;
(4) irradiation: the magnetic conduction double wall heat draw work in-process with preparation in the step (3), be placed on the pay off rack, introduce radiation chamber through tension bracket, the magnetic conduction double-wall heat-shrinkable tube work in-process of making are circulated shine and cooling;
(5) expand: after the good magnetic conduction double wall heat draw of irradiation in the step (4) is heated, expands typing, cooling, make the finished product magnetic conduction double wall heat draw.
The defective that solves prior art of the present invention has following beneficial effect:
1. the present invention's good inner wall layer that adopts high magnetic outer wall and cohesiveness mode of being combined, not only can satisfy the demand of twin wall emitter lateral magnetic conduction, and the cross-linked polyolefin material of selecting for use, have better insulating corrosion, wear-resisting advantage, make the magnetic conduction double-wall heat-shrinkable tube have comprehensive performance like this.
2. inner wall layer of the present invention comes down to one deck EVA hot melt adhesive, its good fluidity, and the value range of melt temperature is wideer, and is easy to use, and has the advantages of good caking property energy.
3. the present invention has directly added magnetic in high magnetic internal wall layer wall material formula, makes heat-shrinkable tube itself have the character of magnetic conduction, and the magnetic conduction effect is splendid.
4. the high magnetic internal wall layer of the present invention wall material employing vinyltrimethoxy silane is coupling agent, has strengthened the intensity of magnetic conduction heat-shrinkable tube, has improved the wearing quality of heat-shrinkable tube, provides cost savings.
5. the present invention has added oxidation inhibitor four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, has increased the ageing resistance of this magnetic conduction double-wall heat-shrinkable tube, has prolonged the work-ing life of heat-shrinkable tube.
6. preparation method of the present invention is the general method for preparing heat-shrinkable tube in the industry, and apparatus for preparation and condition are all easy to control, and production efficiency is higher.
Embodiment
In order to make those skilled in the art person understand the present invention better, and above-mentioned advantage of the present invention can be become apparent more, the present invention is further detailed explanation below in conjunction with specific embodiment.
Embodiment 1
(1) outer wall layer wall material prepares: take by weighing according to each set of dispense ratio in the prescription and get the raw materials ready, described component materials is added in the stirrer, stirring the back adds in the twin-screw mixer machine, under 140～180 ℃ temperature condition, through fully stirring with mixing, rotating speed is transferred to 130r/min, melting temperature is 115～130 ℃, after treating that each component fully merges, obtain outer wall layer wall material through the tablets press granulation, standby;
(2) inner wall layer wall material preparation: according to taking by weighing each component in the prescription, again each component materials is mixed; With the material melting mixing in twin screw extruder that mixes, temperature control below 160 ℃, is obtained inner wall layer wall material;
(3) extrusion moulding: the wall material of preparation in step (1) and the step (2) is added in the forcing machine, extrusion moulding, the outer wall layer material is extruded by different forcing machines with the inner wall layer material herein, cools off then, dries up, and makes magnetic conduction double wall heat draw work in-process;
(4) irradiation: the magnetic conduction double wall heat draw work in-process with preparation in the step (3), be placed on the pay off rack, introduce radiation chamber through tension bracket, the magnetic conduction double-wall heat-shrinkable tube work in-process of making are circulated shine and cooling;
(5) expand: after the good magnetic conduction double wall heat draw of irradiation in the step (4) is heated, expands typing, cooling, make the finished product magnetic conduction double wall heat draw.
Embodiment 2-4
Take by weighing material according to each corresponding in the table 1 component, all the other steps are with embodiment 1.
The high magnetic internal wall layer of table 1 wall material formula list position (%)
High magnetic outer wall layer wall material is by 100 parts of calculating in the embodiment of the invention, inner wall layer wall material is by 100 parts of calculating, outer wall layer is because added magnetic, have high magnetic diffusivity, and be that the heat shrinkable pipe material that elastomerics is made has good heat-shrinkable with the ethylene vinyl acetate, inner wall layer is that adhesiveproperties is good, and the adaptive temperature scope is wide, the hot melt adhesive of easy handling meets the material of two layer walls together, just is prepared into a kind of novel magnetic conduction double wall heat draw.But also can in the outer wall layer material preparation, add pigment as required, make the magnetic conduction double-wall heat-shrinkable tube of multicolour.
What irradiation process adopted in the embodiment of the invention is irradiation device for electronic accelerator, and the rumbatron model is the DD type, and rated output reaches 2.0Mev, and irradiation dose is 12Mrad; Twin-screw mixer machine, forcing machine, twin screw extruder etc. all are types commonly used in the industry.
The above; be the specific embodiment of the present invention only, protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (8)
1. novel magnetic conduction double wall heat draw, it comprises outer wall layer and the inner wall layer with high magnetic, it is characterized in that, described high magnetic outer wall layer wall material is by massfraction, its wall material component comprises: 50～70 parts of ethylene vinyl acetates, 20～40 parts of magnetics and 1～20 part of auxiliary agent, and described auxiliary agent is fire retardant, coupling agent and antioxidant;
Described inner wall layer wall material is by massfraction, and its wall material component comprises: be made up of 70 parts of ethylene vinyl acetates, 20 parts of modified rosins, 7 parts of paraffin and 3 parts of oxidation inhibitor.
2. a kind of novel magnetic conduction double wall heat draw according to claim 1, it is characterized in that, described high magnetic outer wall layer wall material is by massfraction, its wall material component comprises: 60 parts of ethylene vinyl acetates, 30 parts of magnetics and 10 parts of auxiliary agents, and described auxiliary agent is fire retardant, coupling agent and antioxidant;
Described inner wall layer wall material is by massfraction, and its wall material component comprises: be made up of 70 parts of ethylene vinyl acetates, 20 parts of modified rosins, 7 parts of paraffin and 3 parts of oxidation inhibitor.
3. a kind of novel magnetic conduction double wall heat draw according to claim 2 is characterized in that, described magnetic is a kind of or its mixture in Fe-Si-Al magnetic, ferronickel magnetic or the ferromagnetic oxide powder.
4. a kind of novel magnetic conduction double wall heat draw according to claim 2 is characterized in that, described fire retardant is a kind of or its mixture in magnesium hydroxide, aluminium hydroxide and the zinc borate.
5. a kind of novel magnetic conduction double wall heat draw according to claim 2 is characterized in that described coupling agent is silane coupling agent.
6. a kind of novel magnetic conduction double wall heat draw according to claim 5 is characterized in that described coupling agent is vinyltrimethoxy silane.
7. a kind of novel magnetic conduction double wall heat draw according to claim 2 is characterized in that, described antioxidant is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
8. prepare the method for the described a kind of novel magnetic conduction double wall heat draw of claim 1-7, it is characterized in that, may further comprise the steps:
(1) outer wall layer wall material prepares: take by weighing according to each set of dispense ratio in the prescription and get the raw materials ready, described component materials is added in the stirrer, stirring the back adds in the twin-screw mixer machine, under 140～180 ℃ temperature condition, through fully stirring with mixing, rotating speed is transferred to 130r/min, melting temperature is 115～130 ℃, after treating that each component fully merges, obtain outer wall layer wall material through the tablets press granulation, standby;
(2) inner wall layer wall material preparation: according to taking by weighing each component in the prescription, again each component materials is mixed; With the material melting mixing in twin screw extruder that mixes, temperature control below 160 ℃, is obtained inner wall layer wall material;
(3) extrusion moulding: the wall material of preparation in step (1) and the step (2) is added in the forcing machine, extrusion moulding, the outer wall layer material is extruded by different forcing machines with the inner wall layer material herein, cools off then, dries up, and makes magnetic conduction double wall heat draw work in-process;
(4) irradiation: the magnetic conduction double wall heat draw work in-process with preparation in the step (3), be placed on the pay off rack, introduce radiation chamber through tension bracket, the magnetic conduction double-wall heat-shrinkable tube work in-process of making are circulated shine and cooling;
(5) expand: after the good magnetic conduction double wall heat draw of irradiation in the step (4) is heated, expands typing, cooling, make the finished product magnetic conduction double wall heat draw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013102704391A CN103342853A (en) | 2013-07-01 | 2013-07-01 | Novel magnetoconductive double-wall heat-shrinkable tube and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102704391A CN103342853A (en) | 2013-07-01 | 2013-07-01 | Novel magnetoconductive double-wall heat-shrinkable tube and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104260423A (en) * | 2014-10-13 | 2015-01-07 | 东莞三联热缩材料有限公司 | Outdoor anti-aging dual-wall heat-shrinkable tube and preparation method thereof |
| CN114196102A (en) * | 2021-12-28 | 2022-03-18 | 上海长园电子材料有限公司 | Heat-shrinkable double-wall pipe with electromagnetic shielding property and sealing property and preparation method thereof |
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| CN1759156A (en) * | 2003-02-14 | 2006-04-12 | 国家淀粉及化学投资控股公司 | Hot melt adhesive composition |
| WO2008066220A1 (en) * | 2006-11-29 | 2008-06-05 | Ls Cable, Ltd. | Composition for production of low-temperature heat-shrinkable tube and low-temperature heat-shrinkable tube made using the same |
| CN101696298A (en) * | 2009-10-28 | 2010-04-21 | 江苏达胜热缩材料有限公司 | High-voltage halogen-free flame-retardant double-wall heat shrinkage tube and preparation method thereof |
| WO2010151774A1 (en) * | 2009-06-25 | 2010-12-29 | Nomaco Inc. | Self-adjusting insulation, including insulation particulary suited for pipe or duct |
| CN101965122A (en) * | 2009-07-25 | 2011-02-02 | 深圳市沃尔核材股份有限公司 | Magnetic multi-wall heat shrinkable tube and manufacturing method thereof |
-
2013
- 2013-07-01 CN CN2013102704391A patent/CN103342853A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759156A (en) * | 2003-02-14 | 2006-04-12 | 国家淀粉及化学投资控股公司 | Hot melt adhesive composition |
| WO2008066220A1 (en) * | 2006-11-29 | 2008-06-05 | Ls Cable, Ltd. | Composition for production of low-temperature heat-shrinkable tube and low-temperature heat-shrinkable tube made using the same |
| WO2010151774A1 (en) * | 2009-06-25 | 2010-12-29 | Nomaco Inc. | Self-adjusting insulation, including insulation particulary suited for pipe or duct |
| CN101965122A (en) * | 2009-07-25 | 2011-02-02 | 深圳市沃尔核材股份有限公司 | Magnetic multi-wall heat shrinkable tube and manufacturing method thereof |
| CN101696298A (en) * | 2009-10-28 | 2010-04-21 | 江苏达胜热缩材料有限公司 | High-voltage halogen-free flame-retardant double-wall heat shrinkage tube and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104260423A (en) * | 2014-10-13 | 2015-01-07 | 东莞三联热缩材料有限公司 | Outdoor anti-aging dual-wall heat-shrinkable tube and preparation method thereof |
| CN114196102A (en) * | 2021-12-28 | 2022-03-18 | 上海长园电子材料有限公司 | Heat-shrinkable double-wall pipe with electromagnetic shielding property and sealing property and preparation method thereof |
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Application publication date: 20131009 |