Glass fiber group and manufacturing method thereof, and glass fiber reinforced resin-based composite material and manufacturing method thereof

Abstract

The invention discloses a glass fiber group and a manufacturing method thereof, and a glass fiber reinforced resin-based composite material and a manufacturing method thereof. The manufacturing method of the glass fiber group is characterized by comprising the following steps: producing glass fibers by using a centrifugal method, and carrying out a wet-process molding or dry-process molding process on the glass fibers to obtain the glass fiber group with a predetermined shape. According to the invention, since the glass fibers are manufactured by adopting a centrifugal method, glass residues and powdery glass can be obviously reduced through a wet molding process, and the non-fibrosis phenomenon in the composite material is reduced, so that the added glass material can achieve the effect of enhancing the resin performance. The retention length of the glass fibers in the glass fiber reinforced resin-based composite material is larger, the content of the glass fibers is stable and controllable, and the glass fibers are uniformly dispersed. The mechanical strength and the performance of the glass fiber reinforced resin-based composite material are improved, and the glass fiber reinforced resin-based composite material is more stable.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a glass fiber group and a manufacturing method thereof, a glass fiber reinforced resin-based composite material and a manufacturing method thereof. Background technique [0002] Plastics are widely used in various applications due to their light weight, but their low modulus of elasticity make them unsuitable as structural materials. Therefore, plastic can be used as a lightweight and high-strength material by making a composite material with a high modulus of elasticity, such as glass fiber. It is known that glass fibers are widely used to form reinforcing materials for composite materials, and there are other fibers such as carbon fibers and high-strength resin fibers such as Kevlar. [0003] These composite materials containing glass fiber and thermoplastic resin are widely used in many fields such as mechanical parts, electrical parts, aircraft parts, ship part...

AI Technical Summary

Problems solved by technology

[0012] However, in the method described in the above-mentioned patent documents, there are four problems that affect the reinforcing effect of short glass fibers (glass wool) and the quality of composite materials.

[0013] First, the silane coupling agent is indispensable for maintaining the interface adhesion between the inorganic glass fiber and the organic thermoplastic resin, but in the production process of centrifugal glass wool, if the surface is treated by spraying, It will be very uneven and there will be many spots on the fiberglass surface with little or no adhesion

Parts where the silane coupling agent is not bonded sufficiently have insufficient interfacial adhesion with the thermoplastic resin, and the reinforcement effect cannot be fully exerted

[0014] Second, short glass fibers (glass wool) are bundled into a mat in the production process, which is very bulky in this state, and it is difficult to stably put a predetermined amount into the mixing extruder

Therefore, there is a deviation in the feeding amount of the mixing extruder and the problem of lack of stability

[0015] Third, it is temporarily stored in the screw feeder hopper before being put into the mixing extruder, but when it is stirred with a stirring blade during storage, the length of the fiber is shortened due to shearing, resulting in an aspect ratio of less than 10 that lacks the reinforcing effect fiber

Non-fibrillated matter (glass slag) does not contribute to reinforcement. The reason for this is that in addition to undissolved raw materials and air bubbles in the molten glass, production process factors such as flow rate and temperature fluctuation of the molten glass flowing into the spinner are unstable. Difficult to remove unfiberized matter (glass slag)

Images