Manufacturing method of fluorine plastic sleeve

Abstract

The invention discloses a manufacturing method of a fluorine plastic sleeve. The method comprises the following steps: mixing 100 parts of polytetrafluoroethylene dispersion resins, 3 to 15 parts of polyamide-imide resins and 20 to 25 parts of assistant oil by weight; aging the mixed material; taking out the aged material, prefabricating and forming; forming the prefabricated and formed material in a pushing and squeezing manner; volatilizing the sleeve material, formed in a pushing and squeezing manner, to remove the assistant oil; and sintering the sleeve material to obtain the fluorine plastic sleeve. According to the fluorine plastic sleeve produced by utilizing the manufacturing method, the low friction coefficient and the self-lubricating characteristic of fluorine plastic are maintained to a maximum extent; and the defects of the fluorine plastic which is easy to creep and poor in abrasion resistance is overcome. Therefore, the fluorine plastic sleeve has the best balance characteristic of self lubrication and abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and in particular to a method for manufacturing a fluoroplastic sleeve. Background technique [0002] Fluoroplastics have excellent material properties, such as high and low temperature resistance, corrosion resistance, good electrical insulation, non-adhesive properties, etc., and were first used in high-tech military fields such as aviation and aerospace. As its use becomes more and more extensive, it is also widely used in various parts of the car. Because fluoroplastics have excellent resistance to special environmental conditions, low friction, and self-lubricating properties, a polytetrafluoroethylene (PTFE) sleeve has been used in the cable liner of the automotive gear shift system to make gear shifting easier. Flexible and comfortable, it has gradually replaced the traditional lining pipes of high-density polyethylene (HDPE), polypropylene (PP), polyoxymethylene (POM), polybuty...

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Problems solved by technology

[0006] The patent number is CN200810042889.4 "Abrasion Resistant Fluoroplastic Sleeve". At present, its technology has been promoted in the lining pipe of the automobile gear shifting system, but due to the added wear resistance modifier polyoxymethylene (POM) ),) (polyimide) PI, (polyphenylene sulfide) PPS and other materials are not ideal in temperature resistance, wear resistance, and their composite properties with PTFE materials, which must be matched when the automobile shift system is assembled Lubricant (silicon ester paste) use

[0007] With the development of the cable liner of the automobile shifting system, some defects in the existing wear-resistant fluoroplastic bushing technology have also emerged. The general wear-resistant fluoroplastic In the environment, when the lubricant (silicon ester paste) in the automobile shifting system is lost or the working environment is not added or lacks the lubricant (silicon ester paste), the flexibility, comfort and life of the automobile shifting system will also decrease. drop with it

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