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Method for preparing ultrathin superstrong polytetrafluoroethylene raw material belt

A technology of polytetrafluoroethylene and raw material tape, which is applied to flat products, other household appliances, household appliances, etc., can solve the problems of low performance, mechanical properties and electrical properties of polytetrafluoroethylene raw material tape, and achieve excellent The effect of withstand breakdown voltage performance, high tensile strength and good economic benefits

Inactive Publication Date: 2013-01-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The performance of the PTFE tape currently used in my country is relatively low, and its mechanical and electrical properties are far below the level of similar foreign products. The polytetrafluoroethylene raw material belt for the bag has been imported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use polytetrafluoroethylene dispersion resin with a medium compression ratio, pass the dispersion resin through a 40-60 mesh sieve, heat-preserve the dispersion resin with a particle size of 40-60 mesh at 19°C for 30 hours, then put it into an open bottle, and add extrusion aid 120# solvent oil for rubber industry, then close the open bottle, stir at a speed of 30r / min for 1h under airtight conditions, and mix evenly. The amount of extrusion aid added is 15% of the total weight of the dispersed resin. Under the condition of aging for 48h, the aging material was obtained.

[0021] The matured material is pressed into a billet under the condition of 0.8MPa, and then made into a strip material with an extruder, the extrusion speed is 100mm / min, and the diameter of the strip material is 8mm.

[0022] Using a double-roller calender, heat the surface of the rollers of the two-roller calender to 60°C, then put the strip material into the calender and press it into a film; then...

Embodiment 2

[0025] Use polytetrafluoroethylene dispersion resin with medium compression ratio, pass the dispersed resin through a 40-60 mesh sieve, keep the dispersed resin with a particle size of 40-60 mesh at 15°C for 28 hours, then put it into an open bottle, and add extrusion aid 120# solvent oil for rubber industry, then seal the open bottle, stir at 25r / min speed for 2h to mix evenly under airtight conditions, the addition of extrusion aid is 20% of the total weight of the dispersed resin, and put the sealed open bottle at a temperature of 26°C Under the condition of aging for 40h, the aging material was obtained.

[0026] The matured material was pressed into a billet under the condition of 0.4MPa, and then made into a strip-shaped material with an extruder, the extrusion speed was 120mm / min, and the diameter of the strip-shaped material was 9mm.

[0027] Using a double-roller calender, heat the surface of the rollers of the two-roller calender to 75°C, then put the strip material ...

Embodiment 3

[0030] Use polytetrafluoroethylene dispersion resin with medium compression ratio, pass the dispersed resin through a 40-60 mesh sieve, heat-preserve the dispersed resin with a particle size of 40-60 mesh at 12°C for 26 hours, then put it into an open bottle, and add extrusion aid 120# solvent oil for rubber industry, then close the open bottle, stir at 20r / min speed for 3h to mix evenly under airtight conditions, the addition of extrusion aid is 25% of the total weight of the dispersed resin, and put the sealed open bottle at a temperature of 27°C Under the condition of aging for 36h, the aging material was obtained.

[0031] The matured material is pressed into a billet under the condition of 0.5 MPa, and then made into a strip material with an extruder, the extrusion speed is 140 mm / min, and the diameter of the strip material is 10 mm.

[0032] Using a double-roller calender, heat the surface of the rollers of the two-roller calender to 70°C, then put the strip material int...

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PUM

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Abstract

The invention relates to a method for preparing an ultrathin superstrong polytetrafluoroethylene raw material belt, comprising the following steps: (1) employing medium compression ratio polytetrafluoroethylene dispersion resin, adding extrusion aid and evenly mixing the mixture to obtain paste-like mixture, then curing the mixture for at least 24h to obtain a cured material; (2) pressing the cured material into a blank under 0.3-0.8 MPa and then preparing the blank into strip material by an extrusion machine; (3) heating a roller of a two-bowl calendar, pressing the strip material into thin film and then placing the thin film into extracting agent for extracting extrusion aid, taking out and drying the thin film to obtain the ultrathin superstrong polytetrafluoroethylene raw material belt with a thickness ranging from 0.045mm to 0.2mm. With the method of the invention, the high-performance polytetrafluoroethylene raw material belt with autohension, excellent breakdown voltage resistance property and high tensile strength can be obtained; proven by experiments, the product can meet requirements of the aviation industry.

Description

technical field [0001] The invention relates to a raw material tape and a preparation method thereof, in particular to a preparation method of an ultra-thin high-strength polytetrafluoroethylene raw material tape. Background technique [0002] The performance of the PTFE tape currently used in my country is relatively low, and its mechanical and electrical properties are far below the level of similar foreign products. The polytetrafluoroethylene raw material belt for the bag has been imported. [0003] In foreign countries, the processing and product performance of PTFE raw material belts have developed from the past single performance to diversification, making PTFE unsintered film products form ultra-thin, ultra-wide, high dielectric, porous, etc. Diversified series, in addition to the seal to prevent leakage, can also be widely used in the fields of electrical insulation coating, gas-liquid phase separation filtration, chemical (poison) equipment and other fields; use my ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B29C47/92B29C43/24B29C43/58B29C48/92
CPCB29C48/92B29C2948/92647B29C2948/92704B29C2948/92923
Inventor 贺晔红杨丽华杨坚窦立军杨树林冯祯伟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION