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A multi -functional vertical polytetrafluoroethylene board and its layer pressure composite preparation process

A polytetrafluoroethylene sheet, polytetrafluoroethylene technology, which is applied in the directions of lamination, lamination device, lamination auxiliary operation, etc., can solve the problem of poor creep resistance, low bearing capacity, and knotting of polytetrafluoroethylene sealing materials. problems such as low strength, to achieve the effects of good sealing, low preparation cost and simple preparation process

Active Publication Date: 2022-08-09
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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  • A multi -functional vertical polytetrafluoroethylene board and its layer pressure composite preparation process
  • A multi -functional vertical polytetrafluoroethylene board and its layer pressure composite preparation process
  • A multi -functional vertical polytetrafluoroethylene board and its layer pressure composite preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A multifunctional expanded polytetrafluoroethylene sheet, the polytetrafluoroethylene sheet is made by mixing polytetrafluoroethylene, polyvinylidene fluoride (PVDF), glass fiber, titanium dioxide and solvent oil evenly, pre-pressing and extruding rods after molding , after being pressed into a film by twin-screw, heated and volatilized to remove the solvent oil, and the polytetrafluoroethylene microporous film is obtained by horizontal and vertical stretching, and then the polytetrafluoroethylene microporous film is made into a stretched film by a lamination and composite process. Multifunctional PTFE sheet with high tensile strength.

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

[0038] (1) Mixing of raw materials: mechanically mix polytetrafluoroethylene, polyvinylidene fluoride (PVDF), glass ...

Embodiment 2

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

Embodiment 3

[0061] The same parts of this embodiment as in Embodiment 1 will not be repeated, except that the molar ratio of the total hydrogen atoms and fluorine atoms in polytetrafluoroethylene and polyvinylidene fluoride is changed to 1:5.

[0062] The test results of the properties of the modified PTFE sheets prepared in Examples 1, 2, and 3 are compared as shown in Table 1 below:

[0063] Comparison of parameters of PTFE sheets in Table 1 Examples 1, 2, and 3

[0064]

[0065] It can be seen from the experimental results that the ratio of hydrogen atoms in the raw material of the PTFE sheet in Example 2 is increased compared to the PTFE sheet in Example 1, and the fibers are protected from more PVDF wrapping to avoid being pulled during the preparation process. Or peel off with PTFE, so the tensile strength, elongation at break, and impact strength of the PTFE sheet prepared in Example 2 are higher than those in Example 1, and the steady-state creep rate decreases; Compared with ...

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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 lamination composite preparation process thereof. The polytetrafluoroethylene plate is made by mixing polytetrafluoroethylene, polytetrafluoroethylene modified material, fiber material, titanium dioxide and organic solvent evenly, pre-pressing and forming, extruding the bar, and pressing it into a film by twin-screw, then heating and volatilizing. The organic solvent is removed, and the polytetrafluoroethylene microporous film is obtained by horizontal and longitudinal stretching, and the polytetrafluoroethylene microporous film is made into a multifunctional polytetrafluoroethylene plate with high tensile strength through a lamination and composite process. The invention has low preparation cost, simple preparation process, good sealing, chemical stability, thermal stability and electrical insulation, as well as good creep resistance, tensile strength and antibacterial properties.

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 the characteristics of excellent chemical stability, high and low temperature resistance, electrical insulation, high lubrication and non-adhesion. It is the lowest friction coefficient among solid materials and the smallest surface tension among solid materials. adheres 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 the hydrogen, the adjacent CF 2 The units cannot be completely oriented in trans, but form a helical twisted chain, with fluorine atoms covering almost the entire surface of the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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