Bonding and curing process of expanded polytetrafluoroethylene membrane

A polytetrafluoroethylene diaphragm and curing technology, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, lamination devices, etc., can solve the lack of expanded polytetrafluoroethylene diaphragm bonding method and the impact on product quality , Bonding difficulties and other problems

Active Publication Date: 2016-07-13
SHANGHAI KANGNING MEDICAL DEVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The bonding between e-PTFE is extremely difficult, and the binder with complex chemical composition may affect the product quality
[0005] 2. Since the membrane is stretched under heating conditions to produce a microporous structure, it will

Method used

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  • Bonding and curing process of expanded polytetrafluoroethylene membrane
  • Bonding and curing process of expanded polytetrafluoroethylene membrane
  • Bonding and curing process of expanded polytetrafluoroethylene membrane

Examples

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Embodiment 1

[0028] A kind of bonding of the expanded polytetrafluoroethylene diaphragm of the present invention, curing technology, carry out according to the following steps:

[0029] (1) Select FEP emulsion as the binder, and brush the FEP emulsion between several laminated e-PTFE porous membranes; figure 1 As shown, there is a layer of FEP bonding layer 2 (emulsion, moisture, emulsifier) ​​between every two layers of e-PTFE porous membrane 1 (raw meal); bond several layers of e-PTFE porous membrane to a certain thickness sheet, to obtain the e-PTFE diaphragm composite 3.

[0030] (2) Place the e-PTFE diaphragm composite in the middle of two frame-type fixtures, and fix the e-PTFE diaphragm composite and the two frame-type fixtures together with screws around them. Such as figure 2 As shown, the size of the e-PTFE diaphragm composite 3 is 20cm*11cm. Such as image 3 As shown, the size of the plate and frame fixing fixture 4 is 15cm*9cm; the material of the plate and frame fixing fi...

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PUM

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Abstract

The invention discloses a bonding and curing process of an expanded polytetrafluoroethylene membrane, comprising: using FEP (fluorinated ethylene propylene) emulsion as a binder, brushing the FEP emulsion among a plurality of stacked e-PTFE (expanded polytetrafluoroethylene) porous membrane, and bonding the plurality of porous membranes into a sheet of certain thickness to obtain a membrane composite; fixing the membrane composite between two plate-frame fixing clamps; placing the membrane composite along with the clamps in an oven, and heating at 65-250 DEG C in a segmental gradient manner; curing at high temperature and then cooling.By using the FEP emulsion as the binder, the problem of bonding difficulty is solved; by using segmental gradient heating, the problem of removing an emulsifier in the binder is effectively solved; by designing the plate-frame fixing clamps, fixing the membrane composite between the two plate-frame fixing clamps and carrying out segmental gradient heating and high-temperature curing, the problem that the e-PTFE porous membranes experience micropore loss after being heated is solved effectively.

Description

technical field [0001] The invention belongs to the technical field of medical beauty products manufacturing, and relates to a bonding and aging process of expanded polytetrafluoroethylene diaphragms. Background technique [0002] Expanded polytetrafluoroethylene (e-PTFE) is a new type of medical polymer material. Due to its unique microporous structure, general plastic molding processing methods are not suitable for processing this product. In the industry, high-temperature stretching and shaping methods are generally used to produce microporous structures, but the products obtained by such processing methods are generally membrane materials below 1mm, and the thickness requirements of the plastic implant products required are generally around 4-12mm. Based on the above characteristics, it is necessary to use a special process to laminate and bond several diaphragms into a sheet with a certain thickness. [0003] The following difficulties exist in the bonding technology o...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B38/18B32B27/30
CPCB32B27/304B32B37/12B32B38/18
Inventor 陆锐进李锦蓓朱庆马陆军
Owner SHANGHAI KANGNING MEDICAL DEVICE
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