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Preparation method of polytetrafluoroethylene glass fiber wear-resistance plate

A technology of polytetrafluoroethylene glass fiber cloth and polytetrafluoroethylene, which is applied in chemical instruments and methods, glass/slag layered products, lamination, etc., can solve problems such as friction and compression properties that are difficult to meet

Inactive Publication Date: 2012-10-03
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many domestic manufacturers of PTFE fiberglass laminates, but these products are mainly used in the electronics industry. Their superior electrical properties can meet the requirements of dielectric constant and dielectric loss in the electronics industry, but their mechanical properties, especially Friction and compression properties are difficult to meet the requirements of the aerospace field

Method used

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  • Preparation method of polytetrafluoroethylene glass fiber wear-resistance plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The glass fiber cloth with a thickness of 0.2mm and plain weave method is dewaxed at 380°C at a speed of 5 m / min, and then enters the double-sided impregnation tank containing PTFE emulsion through the unwinding device , the glass fiber cloth is driven into a vertical oven and dried and baked in three stages. The temperature of each stage is: 70°C, 170°C, and 240°C to remove water, surfactants and small organic molecules in the emulsion, according to the solid content The requirement of 50% can be impregnated 4 times, and the impregnation speed is 0.3 m / min; then enter the sintering equipment for sintering, the temperature is 400 ° C, after trimming, winding to obtain PTFE glass fiber cloth, and then according to the 4mm plate The thickness is required to be distributed, laminated, and enter the flat vulcanizing machine. First, the temperature is raised to 400°C at 3-5°C / min under the pressure of 1.5MPa; then the temperature is kept at 11MPa and 400°C for 2.5h; Cool at ...

Embodiment 2

[0025] The glass fiber cloth with a thickness of 0.2mm and plain weave method is dewaxed at 370°C at a speed of 4 m / min, and then enters the double-sided impregnation tank containing polytetrafluoroethylene emulsion through the unwinding device , the glass fiber cloth is driven into a vertical oven and dried and baked in three stages. The temperature of each stage is: 60°C, 160°C, and 250°C to remove water, surfactants and small organic molecules in the emulsion. According to the solid content The requirement of 52% can be impregnated 4 times, and the impregnation speed is 0.25 m / min; then enter the sintering equipment for sintering, the temperature is 390 ° C, after trimming, winding to obtain PTFE glass fiber cloth, and then according to the 3mm plate The thickness is required to be distributed, laminated, and enter the flat vulcanizing machine. First, the temperature is raised to 390°C at a pressure of 1.5MPa at 3-5°C / min; then at 14MPa and 400°C for 2 hours; °C / min to cool...

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Abstract

The invention relates to a preparation method of a polytetrafluoroethylene glass fiber wear-resistance plate. The method approximately comprises the following steps that glass fiber cloth is subjected to dewaxing and is then subjected to polytetrafluoroethylene emulsion soaking, drying, baking and sintering to be prepared into polytetrafluoroethylene glass fiber varnished cloth, the varnished cloth is adopted and is subjected to cloth matching and folding, and then, the varnished cloth enters a press vulcanizer to be treated by the work procedures including hot pressing, heat insulation pressure preservation, cooling and the like, and the polytetrafluoroethylene glass fiber wear-resistance plate is obtained. The plate has the advantages that the abrasion rate is small, the friction factors are high, the compression intensity is high, and the environment stability is good.

Description

technical field [0001] The invention relates to a preparation method of a polytetrafluoroethylene glass fiber wear-resistant plate. Background technique [0002] At present, the wear-resistant plates on the market are generally metal alloys, ultra-high molecular weight polyethylene, polytetrafluoroethylene, etc. Metal alloys such as high-hardness chromium carbide wear-resistant plates are used in power plants, steel plants, cement plants and other fields Pulverizers, coal hopper linings, dampers and other components, ultra-high molecular weight polyethylene and PTFE wear-resistant plates are used in deflectors, hydrofoils and slide cars in the fields of papermaking, textiles, chemicals, mining and other machinery and other components, but the comprehensive properties of the above wear-resistant plates such as friction coefficient, wear rate, hardness, and weather resistance cannot meet the application requirements of special fields, especially in the aerospace field. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/04B32B27/04B32B27/06B32B27/30B32B37/10B32B37/06C08L27/18C08K7/14B29C70/40B29C70/54B29C35/02
Inventor 彭为亚刘华新戚伟忠
Owner SHANGHAI PLASTICS RES INST CO LTD