Reinforcing-and-toughening nylon material and preparing method and application thereof

Abstract

The invention discloses a reinforcing-and-toughening nylon material and a preparing method and application thereof. The reinforcing-and-toughening nylon material is prepared from, by weight, 45-80 parts of nylon resin, 15-35 parts of glass fibers, 5-20 parts of a toughening agent and 0.1-2 parts of a lubricating agent. The toughening agent is a compound of an ethylene-octene copolymer and a maleic anhydride grafted ethylene-octene copolymer; the weight ratio of M-POE to POE is 1:1 to 1:4. According to the reinforcing-and-toughening nylon material and the preparing method and application thereof, as an M-POE / POE compounded system is adopted, and the weight ratio of the M-POE to the POE is accurately adjusted and controlled, the unexpected effect is achieved, wherein the toughness, the strength, the mobility and the injection molding surface quality of the reinforcing-and-toughening nylon material are better than that of a product in which an M-POE toughening agent is independently used; when the dosage of the toughening agent is lower than 10%, the notch impact strength is 15 KJ / m<2>; the dosage of the toughening agent is increased to be 15%, the notch impact strength can be 36 KJ / m<2>, the melt index value can be 27 g / 10 min, the mobility of the material is good, and a forged piece is excellent is appearance, smooth in surface and free of floating fibers; when the content of the glass fibers is only 15%, the tensile strength of the materials can be 120 MPa, and the bending strength can be 140 MPa.

Description

technical field [0001] The invention relates to a nylon material, in particular to a reinforced and toughened nylon material, and a preparation method and application of the nylon material; it belongs to the field of polymer composite materials. Background technique [0002] Nylon is one of the important engineering plastics. It is a general term for polymers containing amide groups in the repeating unit of the macromolecular main chain. The amide bonds are polar, can form hydrogen bonds, have strong intermolecular forces, arrange molecular chains neatly, and have high crystallinity, which makes nylon have high mechanical strength and elastic modulus. At the same time, nylon also has the advantages of excellent electrical properties, wear resistance, vibration and sound absorption, oil resistance, weak acid and alkali resistance, and easy molding and processing. It is widely used in automobiles, machinery manufacturing, bearings, electric tools, low-voltage electrical applia...

AI Technical Summary

Problems solved by technology

However, the M-POE toughening agent is an elastomer, which has a high viscosity and poor fluidity, resulting in a decrease in processing fluidity

Although M-POE significantly improves the toughness of the material, it will lead to poor mechanical properties of the material and poor appearance of the part. For example, there are floating fibers on the surface of the part, so it cannot be used in some fields that require high strength and appearance.

[0004] Chinese patent CN101983988A discloses a polyamide 6 composite material and its preparation method, which uses low-viscosity spinning grade polyamide 6 as a flow modifier to improve the processing fluidity and appearance of M-POE toughened polyamide materials, However, due to the addition of spinning grade polyamide 6 in this solution, the molecular weight of the resin in the whole system is reduced, which reduces the mechanical strength of the material to a certain extent.

[0006] It has not been reported to improve the toughness and mechanical strength of nylon materials while improving the fluidity and appearance of materials through the deployment of composite components.

Images