Preparing method for glass fiber enhanced AS composite materials

Abstract

The invention discloses a preparing method for glass fiber enhanced AS composite materials. The preparing method comprises the following steps that A, AS resin, an additive and a processing agent arethrown into a high-speed mixing machine according to the formula, and pre-mixed materials are prepared; the draw ratio of screws of a double-screw extruder is 48:1, the groove depth ratio is 1.51 or 1.55, 12 areas are divided, the pre-mixed materials are mainly fed in a first-area discharging barrel, long glass fiber is fed in the fifth area, the sixth area and the seventh area, and the rotation speed of a main machine is 550-850 r / min; and C, extrusion and pelleting are conducted, and the glass fiber enhanced AS composite materials are obtained. The screw first-area temperature is 20-50 DEG C, the second-area temperature is 110-130 DEG C, the temperature from the third area to the eleventh area is 210-240 DEG C, and the temperature of a machine head is 220-240 DEG C. The preparing methodfor the glass fiber enhanced AS composite materials overcomes the defects that during AS glass fiber modified composite material high glass fiber filling, qualified products are hard to prepare and the strip breakage rate is high in the production process, wherein the defects exist all the time; and the glass fiber enhanced AS composite materials with high mechanical performance can be prepared, and production stability is good.

Description

Technical field [0001] The invention relates to the field of polymer technology, in particular to a method for preparing a glass fiber reinforced AS composite material. Background technique [0002] The scientific name of AS resin is acrylonitrile-styrene copolymer. A polymer compound made by copolymerization of acrylonitrile and styrene. There is thermoplasticity. Not easy to change color. Not affected by dilute acid, dilute alkali, dilute alcohol and gasoline. But it is soluble in acetone, ethyl acetate, ethylene dichloride, etc. Can be used as engineering plastics. Has excellent heat resistance and solvent resistance. Used to make oil-resistant mechanical parts, instrument shells, instrument panels, battery boxes, tractor fuel tanks, battery shells, packaging containers, daily necessities, etc. Plastic-based composite materials have become a popular material to replace steel because of their high specific strength, low density, and designability. In particular, the rap...

AI Technical Summary

Problems solved by technology

However, blindly increasing the speed of the main engine, although the glass fiber can be fully sheared, it is easy to aggravate the uneven mixing of low-melt index AS and glass fiber, and excessive shearing of the glass fiber will also lead to a decline in mechanical properties

The cost of using chopped fibers is high, and the mechanical properties are not enough, so they are not competitive