High glazing and high liquidity glass fiber-reinforced nylon 6 composite material and preparation method thereof

Abstract

The invention discloses a glass-fiber reinforced nylon 6 composite material with high gloss and high fluidity and a preparation method of the glass-fiber reinforced nylon 6 composite material. The glass-fiber reinforced nylon 6 composite material comprises the following components by weight: nylon 6 resin 40 to 88 percent, compatilizer 1 to 20 percent, glass fiber 10 to 50 percent, master batches with high gloss 0.5 to 5 percent, the other additives 0.5 to 4 percent. The master batches with high gloss are made into granulates with organic fatty acid ester, ethylene copolymer and nylon copolymer by being extruded by twin screw. The specific steps of the method are as follow: all the materials except the glass fiber are weighed to be mixed in a mixer for 3 to 5 minutes, and then the mixed material is put into a twin screw extruder with the glass fiber being added from a first exhaust port. The temperatures from a material feeding port to an extrusion die head respectively are: 160 to 180 DEG C, 190 to 220 DEG C, 210 to 240 DEG C, 220 to 250 DEG C and 210 to 240 DEG C, the engine speed is 20 to 50 Hz. Then the material is made into sample with a plastic injection modeling machine. The composite material has the advantages of fine gloss on the surface, good performance and easy process.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a high-gloss, high-flow glass fiber reinforced nylon 6 composite material and a preparation method thereof. Background technique [0002] Glass fiber reinforced nylon has good properties such as high strength, high heat resistance, high fatigue resistance, and low molding shrinkage, so it is widely used in automobiles, machinery, home appliances, aviation and military components and other fields. Traditional application fields usually only have high requirements on the above-mentioned physical and mechanical properties of materials, but do not have high requirements on other characteristics of parts, such as surface gloss. Therefore, in such traditional application fields, when people prepare glass fiber reinforced nylon composite materials, the problem of surface luster caused by the material is usually not considered much. However, with the further expans...

AI Technical Summary

Problems solved by technology

They either propose many special requirements to the raw materials for preparing these glass fiber reinforced composite materials, such as the microfine glass fibers of special fineness mentioned in USP.0035984, JP.6021947, USP.6191207; as mentioned in USP.5804313 Special surface coating treatment; such as the rare earth mineral components mentioned in USP.4528304, etc., which will obviously lead to a substantial increase in product costs; or they are at the expense of the excellent mechanical and thermal properties of certain glass fiber reinforced materials, For example, the use of elastomers proposed in USP.4912150 and USP.5731375, although the corresponding good apparent quality of the parts can be obtained from them, the mechanical properties and thermal properties of the materials will inevitably be greatly lost.

[0015] In addition, the above-mentioned patent technologies did not mention how to improve the molding flow performance of the material while solving the problem of glass fiber exposure