Long glass fibre reinforced nylon material and preparing method thereof

Abstract

The present invention belongs to high polymer material and forming and processing field thereof, and provides a long glass fibre reinforced nylon material and preparing method thereof, wherein the constituents comprise: 29-67wt% of nylons, 30-60wt% of long glass fibre, 2-10wt% of compatilizer and 0.3-1.0wt% of antioxidants. The preparing method comprises the following steps: first mixing the nylons, compatilizer and antioxidants; adding the mixture into a double-screw extruder, wherein the processing temperature is 235-300 DEG C; extruding resin fondants into a dipping mould connected to the double-screw extruder; enabling the long glass fibre to pass through the dipping mould, wherein the dipping temperature of the dipping mould is 260-300 DEG C, dipping the long glass fibre completely in by the fondants, cooling, dragging and granulating the long glass fibre to obtain the long glass fibre reinforced nylon materials. The method of the present invention can strengthen the dipping effect of glass fibre in nylon fondant, eliminate or decrease harmful substances, reduce environmental pollution, and improve the dipping effect and mechanical property of materials effectively.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding and processing, and relates to a long glass fiber reinforced nylon material and a preparation method thereof. Background technique [0002] In the manufacturing process of short fiber reinforced thermoplastics, when the fiber is mixed with the resin in the extruder, the fiber will be damaged due to the shearing between the screw and the barrel. The original 6mm fiber is in the pellets. The length becomes 0.2-1mm (generally below 0.7mm). Because the properties of reinforced plastics are related to fiber length, short fibers make it difficult to use for structural purposes. Long glass fiber reinforced polypropylene has longer glass fiber length and better fiber length distribution, which can improve the mechanical properties of the product, especially the impact strength is significantly improved, and the rigidity is increased, which is beneficial to the application in structural ...

AI Technical Summary

Problems solved by technology

Although a good impregnation effect can be achieved in this way, the use of solvents will cause greater pollution to the environment, and the hazards to production workers are also more prominent. In addition, the online reaction in the pultrusion process makes the control relatively complicated.

However, there is no report on the development and research of direct melt impregnation of low-viscosity nylon 6 to prepare long glass fiber reinforced nylon 6 materials.