Device for polytetrafluoroethylene film hardening and thermal recombining

A technology of polytetrafluoroethylene and curing device, which is applied in the direction of lamination device, chemical instrument and method, application, etc., and can solve the problems of polytetrafluoroethylene film melting, lack of high-temperature adhesive, and difficulty in processing composite filter materials , to achieve the effect of improving uniformity, avoiding environmental pollution, and overcoming high temperature aging

Inactive Publication Date: 2007-05-16
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This curing device is convenient and flexible to use, but it also has certain defects: the polytetrafluoroethylene film is clamped by chains on both sides during the curing process, and due to the action of heat, it is easy to form a suspension in the middle of the film, which eventually causes unevenness of the film , that is, when the two sides have been completely cured, the middle has not yet been cured
The support materials for high-temperature dust removal bags are mostly needle-punched felt made of short fibers such as glass fiber, polyimide, polytetrafluoroethylene, aramid fiber, and polyphenylene sulfide. The temperature below 250°C cannot make the support material Partially melted, and the PTFE film cannot be partially melted, and at the same time, there is a lack of high-temperature adhesives, so the processing of composite filter materials for high-temperature dust bags has become the biggest difficulty

Method used

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  • Device for polytetrafluoroethylene film hardening and thermal recombining
  • Device for polytetrafluoroethylene film hardening and thermal recombining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Refer to Fig. 1, Fig. 3 and Fig. 4 for the device used for curing polytetrafluoroethylene film. The device for curing polytetrafluoroethylene film has a hot roller 1, the wall thickness of the hot roller 1 is 5 mm, the outer diameter is 300 mm, and the material is nickel-based alloy steel. It is heated by 12 electric heating tubes 2 placed inside the heat roller 1. The electric heating tubes are equally packed on the same circumference inside the heating roller 1, and one end of the electric heating tubes is connected with the conductive plate 4 by a wire 3, and all the electric heating tubes 2 are connected in parallel, one end is connected to the positive pole of the power supply, and the other end Connect the negative pole of the power supply. The heat roller 1 rotates synchronously with the conductive disk 4, and the two conductive disks 4 are respectively installed on the rotating shafts 10 on both sides. The conductive disk is provided with a friction conductive ...

Embodiment 2

[0026] Refer to Fig. 1, Fig. 3 and Fig. 4 for the device used for curing polytetrafluoroethylene film. The device for curing polytetrafluoroethylene film has a hot roller 1, the wall thickness of the hot roller 1 is 15 mm, the outer diameter is 450 mm, and the material is nickel-based alloy steel. It is heated by 20 electric heating tubes 2 placed inside the heat roller 1. The electric heating tubes 2 are equally packed on the same circumference inside the heat roller 1, and one end of the electric heating tubes is connected to the conductive disk 4 by a wire 3, all the electric heating tubes 2 are connected in parallel, one end is connected to the positive pole of the power supply, and the other is Connect one end to the negative pole of the power supply. The heat roller 1 rotates synchronously with the conductive disk 4, and the two conductive disks 4 are respectively installed on the rotating shafts 10 on both sides. The conductive disk is provided with a friction conducti...

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Abstract

The invention relates to a device used to solidify and thermally compose politef film, wherein it uses contact solidification method; it has heating roller to heat via internal several electric heating tubes; the surface temperature of roller can be adjusted until 450Deg. C; the politef film or polyurethane- politef can be drawn together to compose the politef above the heating roller. The invention can solidify film uniformly, with low energy consumption. And it arranges one high-temperature resistant rubber roller above the roller; when roller rotates, it will rotate the high-temperature resistant rubber roller, to thermally compose the politef film and support material at certain temperature and pressure. The invention can avoid the aging problem of adhesive to reduce the cost.

Description

technical field [0001] The invention relates to a curing and thermal compounding device, in particular to a polytetrafluoroethylene film curing and thermal compounding device. Background technique [0002] The biaxially stretched polytetrafluoroethylene microporous membrane has a wide temperature range (-200 ° C ~ 260 ° C), a small friction coefficient, and excellent chemical resistance. Therefore, it is widely used as a filter medium in the fields of chemical industry, energy, environmental protection, and electronics. , its microporous morphological structure and strong hydrophobicity make it widely used as the main material of waterproof and moisture-permeable functional fabrics and medical protective clothing, so it has been widely used in many fields. [0003] Curing is a key link in the processing of PTFE microporous membranes, which directly affects the dimensional stability and performance of the membranes. Patent No. 99244710.0 describes a non-contact curing device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/14B29C65/02B29C65/30B32B37/00B29K27/18B29L7/00B29L9/00
Inventor 郭玉海张华鹏陈建勇冯新星
Owner ZHEJIANG SCI-TECH UNIV
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