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Multifunctional expanded polytetrafluoroethylene plate and laminating-compounding preparation process thereof

A technology of polytetrafluoroethylene board and polytetrafluoroethylene, which is applied in the direction of lamination, lamination device, lamination auxiliary operation, etc., can solve the problem of poor creep resistance of polytetrafluoroethylene sealing materials, low tie strength, and the use of Short service life and other problems, achieve excellent sterilization and deodorization performance, low production cost, and increase the effect of smoothness

Active Publication Date: 2020-05-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polytetrafluoroethylene sealing material made by the above-mentioned patent has poor creep resistance, low load-carrying capacity, low tie strength and short service life.

Method used

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  • Multifunctional expanded polytetrafluoroethylene plate and laminating-compounding preparation process thereof
  • Multifunctional expanded polytetrafluoroethylene plate and laminating-compounding preparation process thereof
  • Multifunctional expanded polytetrafluoroethylene plate and laminating-compounding preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A multi-functional expanded polytetrafluoroethylene board, the polytetrafluoroethylene board is made by mixing polytetrafluoroethylene, polyvinylidene fluoride (PVDF), glass fiber, titanium dioxide and solvent oil evenly, and extruding the bar after pre-pressing , after twin-screw pressing to form a film, heat to volatilize to remove the solvent oil, and stretch the polytetrafluoroethylene microporous film vertically and horizontally, and then make the polytetrafluoroethylene microporous film through a lamination process. Multifunctional polytetrafluoroethylene board with high tensile strength.

[0037] The present invention also includes a lamination and composite preparation process for preparing the above-mentioned multifunctional expanded polytetrafluoroethylene board, including the following preparation steps:

[0038] (1) Raw material mixing: mechanically mix polytetrafluoroethylene, polyvinylidene fluoride (PVDF), glass fiber, titanium dioxide and solvent oil in ...

Embodiment 2

[0059] The same parts of this example as in Example 1 will not be repeated, and the difference is that the molar ratio of the total hydrogen atoms and fluorine atoms in polytetrafluoroethylene and polyvinylidene fluoride is changed to 1:3.

Embodiment 3

[0061] The same part of this example as Example 1 will not be repeated, the difference is: the molar ratio of the total hydrogen atoms and fluorine atoms in polytetrafluoroethylene and polyvinylidene fluoride is changed to 1:5.

[0062] The test result contrast of the modified PTFE plate performance of embodiment 1,2,3 preparation is as shown in table 1 below:

[0063] The comparison of each parameter of PTFE sheet material in the embodiment 1,2,3 of table 1

[0064]

[0065] From the experimental results, it can be known that the proportion of hydrogen atoms in the raw material of the PTFE sheet in Example 2 is increased compared with the PTFE sheet in Example 1, and the fibers are protected from being broken during the preparation process under the wrapping protection of more PVDF. Or produce peeling with PTFE, therefore embodiment 2 compares the tensile strength of the PTFE plate prepared in embodiment 1, elongation at break, impact strength is higher, and steady-state c...

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Abstract

The invention relates to the technical field of polytetrafluoroethylene microporous plates, in particular to a multifunctional expanded polytetrafluoroethylene plate and a laminating-compounding preparation process thereof. The polytetrafluoroethylene plate is prepared by the following steps: uniformly mixing polytetrafluoroethylene, a polytetrafluoroethylene modifier, a fiber material, titanium dioxide and an organic solvent; carrying out pre-compression molding, extruding a bar, carrying out double-screw compression molding to form a film, heating to volatilize the organic solvent, carryingout transverse and longitudinal stretching to obtain a polytetrafluoroethylene microporous film, and carrying out a laminating-compounding process on the polytetrafluoroethylene microporous film to prepare the multifunctional polytetrafluoroethylene plate with high tensile strength. The preparation method is low in preparation cost and simple in preparation process, has a good sealing performance,chemical stability, thermal stability and electrical insulating property, and also has good creep resistance, binding strength and antibacterial property.

Description

technical field [0001] The invention relates to the technical field of polytetrafluoroethylene microporous plates, in particular to a multifunctional expanded polytetrafluoroethylene plate and a lamination composite preparation process thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) material has excellent chemical stability, high and low temperature resistance, electrical insulation, high lubrication and non-adhesion, etc. It is the lowest friction coefficient among solid materials, and it is also the smallest surface tension among solid materials. adhere to any substance. The molecular formula of polytetrafluoroethylene is (C 2 f 4 ) The CF2 units in the n molecule are arranged in a zigzag shape. Since the radius of the fluorine atom is slightly larger than that of hydrogen, the adjacent CF 2 The units cannot be completely trans-crossed, but form a helical twisted chain. The fluorine atoms almost cover the surface of the entire polymer chain, and th...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/06B32B38/16B32B38/00B32B37/10B32B27/20B32B27/18B29C48/00B29C48/06B29C55/02
CPCB32B27/322B32B27/08B32B38/164B32B38/0012B32B38/0036B32B37/10B32B38/00B32B38/0008B32B27/20B32B27/18B29C48/0011B29C48/06B29C48/0018B29C55/02B32B2038/168B32B2038/0028B32B2262/101B32B2262/106B32B2307/548B32B2307/7145B32B2307/714B32B2307/308B32B2307/206
Inventor 刁立鹏杨东江张晓东陈学刚徐丽娜
Owner QINGDAO UNIV
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