Nylon material and its preparation method and application

Abstract

The invention relates to a nylon material. The nylon material is prepared from, by weight, 50-80% of nylon 6 copolymer, 10-30% of glass fiber, 3-20% of flexibilizer, 0.1-1% of heat stabilizer, 0.1-1% of processing agents, 0.1-1% of nucleating agent and 0.5-3% of plastic coloring agent, wherein the nylon 6 copolymer is a nylon 6 and long-chain nylon copolymer; the long-chain nylon is formed by condensation polymerization of hexamethylenediamine and dicarboxylic acid; the molecular formula of the dicarboxylic acid is HOOC-(CH2)R-COOH, wherein R=7-12. The nylon material adopts the reasonably-set component ratio, the nylon 6 and long-chain nylon copolymer is adopted as a resin matrix, by means of glass fiber reinforcement, the obtained nylon material has the good injection molding surface, no weld mark is formed on the surface, buckling deformation is low, the rigidity and toughness are balanced well, and the nylon material is quite suitable for automobile component manufacturing.

Description

Technical field [0001] The present invention relates to a polymer material, in particular to a nylon material and its preparation method and application. Background technique [0002] Glass fiber reinforced nylon materials are widely used in automobile interior and exterior parts due to their excellent comprehensive properties such as good rigidity, heat resistance and dimensional stability. [0003] The car door and window frame surrounds the decorative strip, which is used to protect the car door and window frame from being damaged by external forces such as vibration, scratching, collision, etc., to ensure the safety of the car door and window. Therefore, the nylon material used for the car door and window frame to surround the decorative strip needs to have a good balance of rigidity and toughness, that is, the material needs higher impact strength, bending strength, tensile strength and other mechanical properties. However, the traditional glass fiber reinforced nylon 6 and n...

AI Technical Summary

Problems solved by technology

However, the traditional polyolefin elastomer toughened glass fiber reinforced nylon 6 and nylon 66 materials are prone to weld lines during multi-gate injection molding, which affects the appearance of the parts.

[0005] Moreover, general polyolefin elastomer toughened glass fiber reinforced PA6 and PA66 materials are prone to warping and deformation during injection molding, especially when injecting long and thin-walled parts such as automotive door and window frame surround trim strips.

The warping deformation will obviously seriously affect the later assembly of the parts.

Although the addition of mineral fillers such as mica, talc, wollastonite and glass fiber can improve the warpage of glass fiber reinforced PA6 and PA66, but the impact strength of the material is greatly reduced

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