CN104231384A - Preparation method of polyethylene film with high heat conduction - Google Patents
Preparation method of polyethylene film with high heat conduction Download PDFInfo
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- CN104231384A CN104231384A CN201410420895.4A CN201410420895A CN104231384A CN 104231384 A CN104231384 A CN 104231384A CN 201410420895 A CN201410420895 A CN 201410420895A CN 104231384 A CN104231384 A CN 104231384A
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- polyethylene
- heat conduction
- high heat
- preparation
- polyethylene film
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a preparation method of a polyethylene film with high heat conduction. The preparation method is characterized by comprising the following steps: a, sufficiently dissolving polyethylene in an organic solvent at 130-190 DEG C, and introducing nitrogen gas for 1-10 minutes to prepare a polyethylene solution; b, pouring the polyethylene solution prepared in the step a into a cooling liquid of minus 10-25 DEG C to form polyethylene gel, and removing a solvent in vacuum for 1-20 minutes; c, pouring the polyethylene gel prepared in the step b into a screw extruder, and longitudinally drawing by virtue of a roller after carrying out tape-casting, extruding and film forming at 10-60 DEG C, wherein the drawing temperature is 30-90 DEG C and the drawing degree is 60-8000%; and finally, drying by virtue of hot air to obtain the polyethylene film with high heat conduction. According to the polyethylene-fiber-modified EVA (ethylene vinyl acetate) packaging film disclosed by the invention, the heat conduction of a high polymer material is improved by virtue of a mode of replacing the conventional heat conduction filler adding by changing a processing process.
Description
Technical field
The present invention relates to a kind of preparation method of film, particularly relate to a kind of preparation method of high heat conduction polyethylene film.
Background technology
Under most cases, macromolecule membrane is mostly isolator, is again not transcalent material simultaneously.In order to improve the thermal conductivity of polymeric membrane, usual way adds to heat heat conductive filler man-hour, and this method promotes the limited extent of thermal conductivity, can damage mechanical property and the ageing-resistant performance of macromolecular material simultaneously.Along with the fast development of integrated technology and package technique aspect, the occupation of land space of electronic component and logical circuit is also more and more less, so traditional macromolecule heat conduction material more and more cannot meet people for the application in industrial production.Therefore, the important subject that heat-conducting polymer material becomes industrial circle and even various circles of society how is promoted.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of high heat conduction polyethylene film, replaced the mode of traditional interpolation heat conductive filler by the change of complete processing, to improve the thermal conductivity of macromolecular material.
Technical scheme of the present invention is: a kind of preparation method of high heat conduction polyethylene film, specifically comprises the steps:
A. at 130-190 DEG C, polyethylene is fully dissolved in organic solvent, then passes into nitrogen 1-10min;
B. the polyethylene solution that step a obtains is poured in the cooling fluid of-10-25 DEG C and form polyethylene gel, and solvent removed by vacuum 1-20min;
C. pour in screw extrusion press by step b gained polyethylene gel, at 10-60 DEG C, carry out longitudinal stretching after curtain coating film extrusion through roller, draft temperature is 30-90 DEG C, and level of stretch is 60-8000%, obtains high heat conduction polyethylene film finally by warm air drying.
In described step a, molecular weight of polyethylene is 100-600 ten thousand, and molecular weight distribution width is 1-1.2.
In described step a, organic solvent is toluene, trieline, naphthane, perhydronaphthalene, sherwood oil, tetrahydrofuran (THF), dimethylbenzene, ethyl acetate, vinyl acetic monomer, one or more the mixing in methylene dichloride.
In described step a, in polyethylene solution, mass ratio shared by polyethylene is 0.1-30%.
In described step b, cooling fluid is water, acetone, ethanol, glycerine, methyl alcohol, cyclopentanone, Virahol, methylene dichloride, one or more the mixing in trichloromethane.
In described step b, polyethylene gel is after solvent removed by vacuum, the solvent containing 10-75% mass ratio.
In described step c polyethylene gel stretched after, the solvent containing 5-50% mass ratio.
In described step c, warm air drying treatment temp is 50-120 DEG C.
The high heat conduction polyethylene film thickness that described step c obtains is 30-200 μm.
Beneficial effect: the preparation method of disclosed a kind of high heat conduction polyethylene film, replaces the mode of traditional interpolation heat conductive filler, to improve the thermal conductivity of macromolecular material by the change of complete processing.And experiment to show at macromolecule membrane, adding man-hour by improving the orientation of macromolecular chain and crystallization degree, can increase substantially thermal conductivity.High heat conduction polyethylene film thermal conductivity provided by the invention can reach 3-50 W/mk, and the polyethylene film of routine only has about 0.3 W/mk.
Embodiment
Below in conjunction with specific embodiment, clear, complete description is carried out to technical scheme of the present invention.
The preparation method of disclosed a kind of high heat conduction polyethylene film, specifically comprises the steps:
A. at 130-190 DEG C, polyethylene is fully dissolved in organic solvent, then passes into nitrogen 1-10min and obtain polyethylene solution;
B. the polyethylene solution that step a obtains is poured in the cooling fluid of-10-25 DEG C and form polyethylene gel, and solvent removed by vacuum 1-20min;
C. pour in screw extrusion press by step b gained polyethylene gel, at 10-60 DEG C, carry out longitudinal stretching after curtain coating film extrusion through roller, draft temperature is 30-90 DEG C, and level of stretch is 60-8000%, obtains high heat conduction polyethylene film finally by warm air drying.
Wherein, in described step a, molecular weight of polyethylene is 100-600 ten thousand, and molecular weight distribution width is 1-1.2; In described step a, organic solvent is toluene, trieline, naphthane, perhydronaphthalene, sherwood oil, tetrahydrofuran (THF), dimethylbenzene, ethyl acetate, vinyl acetic monomer, one or more the mixing in methylene dichloride; In described step a, in polyethylene solution, mass ratio shared by polyethylene is 0.1-30%; In described step b, cooling fluid is water, acetone, ethanol, glycerine, methyl alcohol, cyclopentanone, Virahol, methylene dichloride, one or more the mixing in trichloromethane; In described step b, polyethylene gel is after solvent removed by vacuum, the solvent containing 10-75% mass ratio; In described step c polyethylene gel stretched after, the solvent containing 5-50% mass ratio; In described step c, warm air drying treatment temp is 50-120 DEG C; The high heat conduction polyethylene film thickness that described step c obtains is 30-200 μm.
Be described with specific embodiment below.
embodiment 1
A preparation method for high heat conduction polyethylene film, specifically comprises the steps:
A. at 140 DEG C, 0.5kg polyethylene (molecular weight 1050000, molecular weight distribution 1.05) is fully dissolved in 100kg perhydronaphthalene, and passes into nitrogen 1-10min and obtain polyethylene solution;
B. the polyethylene solution that step a obtains is poured in the 300kg ethanol of-10 DEG C and form polyethylene gel, solvent removed by vacuum 20min;
C. the polyethylene gel that step b is obtained is poured in screw extrusion press, longitudinal stretching is carried out through roller after curtain coating film extrusion at 50 DEG C, draft temperature is 50-60 DEG C, level of stretch is 6000%, finally at 80 DEG C, warm air drying obtains thickness is 100 μm high heat conduction polyethylene films, and its thermal conductivity is 5W/mk.
embodiment 2
A preparation method for high heat conduction polyethylene film, specifically comprises the steps:
A., at 140 DEG C, 3kg polyethylene (molecular weight 2000000, molecular weight distribution 1.05) is fully dissolved in 50kg dimethylbenzene, passes into nitrogen 1-10min and obtain polyethylene solution;
B. the polyethylene solution that step a obtains is poured in the 100kg water of-10 DEG C and form polyethylene gel, solvent removed by vacuum 20min;
C. the polyethylene gel that step b is obtained is poured in screw extrusion press, longitudinal stretching is carried out through roller after curtain coating film extrusion at 60 DEG C, draft temperature is 50-60 DEG C, level of stretch is 7000%, finally at 90 DEG C, warm air drying obtains thickness is 120 μm high heat conduction polyethylene films, and its thermal conductivity is 15W/mk.
embodiment 3
A preparation method for high heat conduction polyethylene film, specifically comprises the steps:
A., at 140 DEG C, 0.8kg polyethylene (molecular weight 5000000, molecular weight distribution 1.02) is fully dissolved in 100kg perhydronaphthalene, passes into nitrogen 1-10min and obtain polyethylene solution;
B. the polyethylene solution that step a obtains is poured in the 300kg ethanol of-5 DEG C and form polyethylene gel, solvent removed by vacuum 20min;
C. the polyethylene gel that step b is obtained is poured in screw extrusion press, longitudinal stretching is carried out through roller after curtain coating film extrusion at 50 DEG C, draft temperature is 50-60 DEG C, level of stretch is 8000%, finally at 90 DEG C, warm air drying obtains thickness is 100 μm high heat conduction polyethylene films, and its thermal conductivity is 35W/mk.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope all belonging to the invention.
Claims (9)
1. a preparation method for high heat conduction polyethylene film, is characterized in that: the method comprises the steps:
A. at 130-190 DEG C, polyethylene is fully dissolved in organic solvent, then passes into nitrogen 1-10min and obtain polyethylene solution;
B. the polyethylene solution that step a obtains is poured in the cooling fluid of-10-25 DEG C and form polyethylene gel, and solvent removed by vacuum 1-20min;
C. pour in screw extrusion press by step b gained polyethylene gel, at 10-60 DEG C, carry out longitudinal stretching after curtain coating film extrusion through roller, draft temperature is 30-90 DEG C, and level of stretch is 60-8000%, obtains high heat conduction polyethylene film finally by warm air drying.
2. the preparation method of high heat conduction polyethylene film according to claim 1, it is characterized in that: in described step a, molecular weight of polyethylene is 100-600 ten thousand, molecular weight distribution width is 1-1.2.
3. the preparation method of high heat conduction polyethylene film according to claim 1, it is characterized in that: in described step a, organic solvent is toluene, trieline, naphthane, perhydronaphthalene, sherwood oil, tetrahydrofuran (THF), dimethylbenzene, ethyl acetate, vinyl acetic monomer, one or more the mixing in methylene dichloride.
4. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: in described step a, in polyethylene solution, mass ratio shared by polyethylene is 0.1-30%.
5. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: in described step b, cooling fluid is water, acetone, ethanol, glycerine, methyl alcohol, cyclopentanone, Virahol, methylene dichloride, one or more the mixing in trichloromethane.
6. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: in described step b, polyethylene gel is after solvent removed by vacuum, the solvent containing 10-75% mass ratio.
7. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: in described step c polyethylene gel stretched after, the solvent containing 5-50% mass ratio.
8. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: in described step c, warm air drying treatment temp is 50-120 DEG C.
9. the preparation method of high heat conduction polyethylene film according to claim 1, is characterized in that: the high heat conduction polyethylene film thickness that described step c obtains is 30-200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410420895.4A CN104231384A (en) | 2014-08-26 | 2014-08-26 | Preparation method of polyethylene film with high heat conduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410420895.4A CN104231384A (en) | 2014-08-26 | 2014-08-26 | Preparation method of polyethylene film with high heat conduction |
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| CN104231384A true CN104231384A (en) | 2014-12-24 |
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| CN201410420895.4A Pending CN104231384A (en) | 2014-08-26 | 2014-08-26 | Preparation method of polyethylene film with high heat conduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120152495A (en) * | 2025-03-28 | 2025-06-13 | 九江市柔烁光电科技有限公司 | A flexible perovskite solar cell module for alleviating hot spot effect and its preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157768A (en) * | 2007-11-23 | 2008-04-09 | 袁志庆 | Super-hydrophobic high-density polyethylene film and preparation method thereof |
| CN101608344A (en) * | 2008-06-19 | 2009-12-23 | 胡盼盼 | A kind of novel method for continuously dissolving spinning by ultra-high molecular weight polythene |
| CN102939409A (en) * | 2010-04-30 | 2013-02-20 | 霍尼韦尔国际公司 | High-strength ultra-high molecular weight polyethylene fiber products and processes |
-
2014
- 2014-08-26 CN CN201410420895.4A patent/CN104231384A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157768A (en) * | 2007-11-23 | 2008-04-09 | 袁志庆 | Super-hydrophobic high-density polyethylene film and preparation method thereof |
| CN101608344A (en) * | 2008-06-19 | 2009-12-23 | 胡盼盼 | A kind of novel method for continuously dissolving spinning by ultra-high molecular weight polythene |
| CN102939409A (en) * | 2010-04-30 | 2013-02-20 | 霍尼韦尔国际公司 | High-strength ultra-high molecular weight polyethylene fiber products and processes |
Non-Patent Citations (4)
| Title |
|---|
| C. L. CHOY 等: "Elastic Modulus and Thermal Conductivity of Ultradrawn Polyethylene", 《JOURNAL OF POLYMER SCIENCE: PART B: POLYMER PHYSICS》 * |
| 代少俊 主编: "《高性能纤维复合材料》", 28 February 2013, 华东理工大学出版社 * |
| 朱清仁 等: "预热处理对超高分子量聚乙烯层积状片晶凝胶膜结构的影响", 《高分子学报》 * |
| 蔡忠龙 等: "超拉伸聚乙烯的弹性模量和导热性能", 《高分子学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120152495A (en) * | 2025-03-28 | 2025-06-13 | 九江市柔烁光电科技有限公司 | A flexible perovskite solar cell module for alleviating hot spot effect and its preparation method and application |
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Application publication date: 20141224 |