Novel polyamide material for replacing metal material, and preparation method thereof

Abstract

The invention relates to the field of high-performance engineering plastics, and especially relates to a novel polyamide material for replacing a metal material, and a preparation method thereof. Theformula (100 wt%) of the novel polyamide material for replacing the metal material comprises polyamide, glass fibers, glass microbeads, a toughening agent, an anti-wear agent, a weather-resistant additive and other additives. The preparation method comprises the following steps: weighing raw materials in proportion; treating the surfaces of the glass fibers and the glass microbeads with a couplingagent; stirring the treated glass microbeads, the toughening agent, the anti-wear agent and other additives in a high-speed mixer for 1-5 min, and discharging the obtained material; and adding the material into a twin-screw extruder having a rotating rate of 200-800 r / min and a temperature of 250-300 DEG C, and adding a specific proportion of the treated glass fibers to a side feeder of the extruder in order to obtain the finished product. The preparation method has the advantages of simplicity and convenience.

Description

technical field [0001] The invention relates to the field of high-performance engineering plastics, in particular to a novel polyamide material replacing metal materials and a preparation method thereof. Background technique [0002] Polyamide (PA) is a general term for polymers containing amide groups (-CO-NH-) in the repeating unit of the macromolecular main chain. Polyamides can be prepared by ring-opening polymerization of lactams, or by polycondensation of diamines and dibasic acids. It was the DuPont company of the United States that first developed the resin for fiber, and it was industrialized in 1939. In the 1950s, the development and production of injection molding products began to replace metals to meet the requirements of lightweight and cost-reducing downstream industrial products. PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low friction coefficie...

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Problems solved by technology

[0003] Chinese patent CN105131592A discloses a production method of high glass fiber content reinforced PA66 composite. This method describes the method of solving the appearance and improving the mechanical properties, but does not elaborate on the use of the material

[0004] Chinese patent CN104231611A discloses a method for glass fiber reinforced nylon. This method requires professional transformation of equipment, and the specific implementation is extremely difficult, and it is not easy to realize industrialized mass production.

But now many fields have higher and higher requirements for weight reduction, and this method cannot achieve this goal

[0006] Chinese patent CN105419319A introduces an anti-UV glass fiber reinforced nylon material and its preparation method, and compares the UV resistance of glass fiber reinforced nylon, which does not involve the actual application of the product

[0007] Chinese patents CN105419315A and CN105295370A respectively introduced high glass fiber content reinforced nylon 6 material and nylon 66 material and their preparation methods. This method compares several methods for improving the surface properties of parts and does not involve product application

[0012] In view of the above status quo, there are certain problems in the characteristics of polyamide materials, and the stability needs to be improved, and the specific implementation is extremely difficult

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