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High and low temperature resistant zone sealing strip PTFE resin composite material and preparation method thereof

A technology of resin composite material and low temperature zone, which is applied in the field of composite materials, can solve problems such as deformation, and achieve the effects of improving wear resistance and heat resistance, excellent thermal stability, and high hardness

Inactive Publication Date: 2018-02-02
NANJING COMPTECH COMPOSITES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air scroll compressor is a compressor that compresses air to obtain high-pressure gas. Although the ambient temperature of the sealing strip in the low-temperature area is lower than that in the high-temperature area, the sealing strip in the low-temperature area still rubs quickly during the working process of the air scroll compressor. It will lead to rapid temperature rise. In order to prevent the deformation of the sealing strip, it needs to be made of high temperature resistant material

Method used

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  • High and low temperature resistant zone sealing strip PTFE resin composite material and preparation method thereof
  • High and low temperature resistant zone sealing strip PTFE resin composite material and preparation method thereof

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Embodiment 1-3

[0023] The preparation method of the high-temperature-resistant and low-temperature zone sealing strip for the air scroll compressor comprises the steps of:

[0024] (1) Add nano-silica and solid glass microspheres to ethanol solution respectively, after ultrasonic dispersion is uniform, add silane coupling agent, ultrasonically stir, filter to obtain precipitate, wash and dry;

[0025] (2) Add POB powder into dimethylformamide and stir evenly;

[0026] (3) Use acetone to infiltrate the product obtained in step (1) (2) with polytetrafluoroethylene powder, stir thoroughly through a high-shear dispersing emulsifier to make it evenly mixed, and dry it at 120°C for 2-6h. Moisture and solvent are removed; the content of each component is shown in Table 1;

[0027] (4) Molding after cooling, holding pressure for 2 minutes, holding pressure 15-30MPa, sintering temperature 360-400°C, sintering for 3~6h, naturally cooling to room temperature with the furnace, mechanical processing aft...

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Abstract

The invention discloses a high and low temperature resistant zone sealing strip PTFE resin composite material. The composite material comprises, by mass, 17-23% of POB, 3-8% of solid glass beads, 3-5%of nano-silica, 1-2% of a silane coupling agent, 1-3% of dimethyl formamide, and the balance of PTFE. The invention also discloses a preparation method of the composite material. The POB (poly-p-oxybenzoyl) is an insoluble and infusible aromatic high crystallinity polymer, has a decomposition temperature reaching 530 DEG C, can be used at 300 DEG C for a long term, and has the advantages of highhardness, excellent heat stability, excellent ageing corrosion resistance, excellent compressive creep resistance, and good complementation with PTFE in performances. The solid glass beads and the nano-silica effectively improve the wear resistance and the heat resistance of the material, and a high and low temperature resistant zone sealing strip made from the material can be used at -250-90 DEGC for a long term without deformation.

Description

technical field [0001] The invention relates to a PTFE resin composite material for a high-temperature-resistant low-temperature zone sealing strip for an air scroll compressor on a new energy vehicle and a preparation method thereof, and belongs to the field of composite materials. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear. In order to overcome the defects of pure PTFE, surface modification, filling modification or blending modification are usually used to improve its comprehensive performance. Among them, filling modification is widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L67/00C08K9/06C08K3/36C08K7/20
CPCC08L27/18C08L2201/08C08L67/00C08K9/06C08K3/36C08K7/20
Inventor 杨文光杨烨靳予孙佳青孙克原陈佩民陈朝曦焦小东陈银夏炎
Owner NANJING COMPTECH COMPOSITES CORP
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