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Polytetrafluoroethylene alloy and preparation method thereof

A polytetrafluoroethylene and alloy technology, applied in the field of polymer alloy and its preparation, can solve the problems of not meeting the requirements of use, large damage of friction materials, increase of friction coefficient, etc., and achieve good fluidity in forming and processing, and increase in hardness and rigidity , The effect of reducing the coefficient of linear expansion

Inactive Publication Date: 2010-09-15
浙江超维新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of these ingredients tends to increase the coefficient of friction and cause greater damage to the material being rubbed. Therefore, this type of improved material is not ideal and cannot meet the requirements of high-tech fields such as biology, aerospace, energy and lasers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Proportion: 97wt% polytetrafluoroethylene, 3wt% main chain polyester liquid crystal polymer, the particle size of the main chain polyester liquid crystal polymer is 60 mesh.

[0022] 2. Preparation method:

[0023] (1) Mixing: Add the above materials into the mixer and mix evenly;

[0024] (2) molding: molding the mixed material through step (1);

[0025] (3) Sintering: sintering the molded material in step (2) at 400°C;

[0026] (4) Cooling: cooling the material after sintering in step (3) to room temperature.

Embodiment 2

[0028] 1. Proportion: 60wt% polytetrafluoroethylene, 40wt% main chain polyester liquid crystal polymer, the particle size of the main chain polyester liquid crystal polymer is 60 mesh.

[0029] 2. Preparation method:

[0030] (1) Mixing: Add the above materials into the mixer and mix evenly;

[0031] (2) molding: molding the mixed material through step (1);

[0032] (3) Sintering: sintering the molded material in step (2) at 400°C;

[0033] (4) Cooling: cooling the material after sintering in step (3) to room temperature.

Embodiment 3

[0035] 1. Proportion: 85 wt% polytetrafluoroethylene, 15 wt% main chain polyester liquid crystal polymer, the particle size of the main chain polyester liquid crystal polymer is 80 mesh.

[0036] 2. Preparation method:

[0037] (1) Mixing: Add the above materials into the mixer and mix evenly;

[0038] (2) molding: molding the mixed material through step (1);

[0039] (3) Sintering: sintering the molded material in step (2) at 340°C;

[0040] (4) Cooling: cooling the material after sintering in step (3) to room temperature.

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Abstract

The invention relates to a polymer alloy, which mainly comprises the following components in percentage by weight: 60 to 97 percent of polytetrafluoroethylene, 3 to 40 percent of main chain polyester liquid crystal polymer and the balance of auxiliary material. The auxiliary material is one or two of carbon fiber and glass fiber, wherein the carbon fiber is 0 to 15 weight percent of the auxiliary material; the glass fiber is 0 to 15 weight percent of the auxiliary material; and the auxiliary material comprises 0 to 5 weight percent of graphite. The wear-resistant polytetrafluoroethylene alloy has the advantages of high wear resistance, high hardness, low creep property, low friction coefficient and abrasion coefficient and the like.

Description

technical field [0001] The invention relates to a polymer alloy and a preparation method thereof, in particular to a wear-resistant polytetrafluoroethylene alloy and a preparation method thereof. Background technique [0002] Polytetrafluoroethylene (PTFE for short) is a thermosetting engineering plastic with excellent self-lubrication, corrosion resistance, dielectric properties and heat resistance, known as the "King of Plastics". The coefficient of friction of PTFE is the lowest among polymer materials; soaked in "aqua regia", its performance remains unchanged, and its corrosion resistance is the crown of plastics, so its application range is very wide, and it is often used as high-grade sealing material. However, PTFE also has disadvantages such as high creep, low hardness, serious wear, large thermal expansion coefficient, poor thermal conductivity, and large product size changes, which limit its application in production, life, scientific research and other fields. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L67/00C08K7/14C08K7/06C08K3/04
Inventor 赵安赤王建虎王建琴
Owner 浙江超维新材料有限公司
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