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Teflon cloth with PTFE films compounded and preparation method and application of Teflon cloth

A technology of Teflon cloth and glass fiber cloth, which is applied in the field of Teflon cloth with composite PTFE membrane and its preparation, can solve the problems that Teflon cloth cannot meet the requirements of harsh working conditions, and achieve high tensile strength, High peel strength and good folding resistance

Active Publication Date: 2020-07-10
上海井辰复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first object of the present invention is to provide the preparation method of the Teflon cloth of composite PTFE membrane, to solve the technical problem that the Teflon cloth in the prior art cannot meet the severe working condition requirement

Method used

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  • Teflon cloth with PTFE films compounded and preparation method and application of Teflon cloth
  • Teflon cloth with PTFE films compounded and preparation method and application of Teflon cloth
  • Teflon cloth with PTFE films compounded and preparation method and application of Teflon cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present embodiment provides the preparation method of the Teflon cloth of composite PTFE membrane, comprises the steps:

[0048] (1) Soak a 0.8mm thick glass fiber cloth in a silicone oil emulsion with a mass fraction of 3% for 3 minutes, take it out and place it in an oven at 100-120°C for 8-10 minutes to dry;

[0049] (2) After dip-coating the PTFE suspoemulsion with a specific gravity of 1.20 on both sides of the glass fiber cloth treated in step (1), dry it in an oven at 360°C; then repeat the above-mentioned dip-coating operation 3 times;

[0050] (3) Take the stress-relieved PTFE membrane, and compound the stress-relieved PTFE membrane on both sides of the glass fiber cloth treated in step (2); apply a pressure of 10kg on the surface and heat-preserve and sinter at a temperature of 355°C for 3h ;

[0051] (4) After the sintering is completed, slowly lower the temperature to contact the internal stress of the PTFE membrane; wherein, the cooling conditions incl...

Embodiment 2～ Embodiment 24

[0053] Examples 2 to 24 refer to the preparation method of Example 1, and the specific parameters of each step are shown in Table 1 and Table 2 below.

[0054] The specific parameters of different embodiments of table 1

[0055]

[0056]

[0057] The specific parameters of different embodiments of table 2

[0058]

experiment example 1

[0065] In order to illustrate the impact of different conditions adopted by the present invention on product performance, the following comparative experiments were carried out.

[0066] Take glass fiber cloth woven with 6μm yarn, take five pieces of 20cm×20cm small samples A, B, C, D, and E, and soak them in five pieces with mass fractions of 3%, 5%, 10%, 15%, and 20%. Put it in the silicone oil emulsion for 3 minutes, take it out and place it in an oven at 100-120°C for 8-10 minutes to dry it, take it out and weigh it, the specific data are shown in Table 3 below.

[0067] Table 3 The weighing quality after different silicone oil emulsion treatment

[0068] Numbering before processing After silicone oil emulsion treatment A 34g 34.12g B 34g 34.2g C 34g 34.4g D 34g 34.6g E 34g 34.8g

[0069] Cut the above-mentioned silicone oil emulsion-treated small samples A, B, C, D, and E into four small samples of 10cm×10cm, and mark them a...

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Abstract

The invention relates to the technical field of modified Teflon cloth, in particular to a Teflon cloth with PTFE films compounded and a preparation method and application of the Teflon cloth. The preparation method of the Teflon cloth with the PTFE films compounded comprises the following steps that (a), a substrate of fiberglass cloth is dried after wetting treatment in a silicone oil emulsion; (b), after the treatment in step (a), a PTFE suspended emulsion is dip-coated on the two sides of the fiberglass cloth and dried; and (c), after the treatment in the step (b), the PTFE films are compounded on the two sides of the fiberglass cloth, sintered at 345-400 DEG C for 3-48h and cooled. The prepared Teflon cloth with the PTFE films compounded is high in tensile strength, good in folding resistance, good in high temperature resistance, can resist the corrosion of different concentrations of acid, alkali and an organic solvent, and can be suitable for the harsh working conditions of a flue gas pipeline, desulfurization and dust removal, industrial air exhaust and the like, and has a long service life.

Description

technical field [0001] The invention relates to the technical field of modified Teflon cloth, in particular to a Teflon cloth with a composite PTFE membrane and a preparation method and application thereof. Background technique [0002] Teflon cloth, the scientific name is polytetrafluoroethylene coated glass fiber cloth. The Teflon cloth on the existing market is all made of alkali-free or medium-alkali glass fiber cloth dipped in PTFE (also known as polytetrafluoroethylene or Teflon) suspension emulsion, and then sintered in a high temperature environment. In actual production, due to the product characteristics of PTFE suspoemulsion, only multi-layer sintering can be used, the latter layer is coated with the previous layer for sintering, and the body is adhered to each other in a molten state in a high temperature environment to form a layer on the surface of the glass fiber cloth. PTFE membrane, get Teflon cloth. [0003] Teflon cloth has certain Teflon characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/00B32B27/32B32B27/12B32B17/02B32B17/10B32B27/04B32B33/00B29K27/18
CPCB29D7/00B32B27/322B32B27/12B32B5/02B32B17/10B32B33/00B32B2262/101B32B2260/046B32B2260/021B32B2307/54B32B2307/306B32B2307/714B32B2307/50B32B2250/40B32B2250/03B29K2027/18
Inventor 王明震
Owner 上海井辰复合材料有限公司
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