Method for manufacturing novel lining plate

Abstract

The invention discloses a method for manufacturing a novel lining plate, comprising the following steps: (1) manufacturing surface blank felt; (2) manufacturing fabric felt; (3) spreading thermoplastic resin powder on the surface of the fabric felt and the blank felt to carry out the first presoaking; (4) carrying out fixed network, needling in advance and winding on the soaked blank felt and fabric felt; (5) carrying out unwinding and secondary dredge powdering in accordance with the sequence of blank felt, fabric felt and blank felt; (6) needling and reinforcing; (7) carrying out the seconddry method presoaking on the above formed continuous needling felt; and (8) utilizing an oven to plasticize and fuse the continuous needling felt at high temperature to produce finished products by rolling, cooling shape and cutting edge. The manufacturing method significantly improves the denseness and uniformity of fabric materials distributed in matrix, meets the mechanical property of matrix material constituents, thereby obtaining a structural board with high rigidity, high intensity, light weight and wide width, and accelerating the process of industrialization, which uses lining platesof fridge containers produced in China to substitute aluminium plates, stainless steel plates and coil products.

Description

technical field [0001] The invention relates to a method for manufacturing structural boards, especially a method for manufacturing new-type inner lining boards using chopped strand mats, woven mats, needle-punched mats, etc. impregnated by a secondary electrostatic dry method. Lining boards, refrigerated warehouse wall guards, railcars, trailers, container car interior panels, engine bottom guards, compartment trims, and instrument panel skeletons for cars, commercial vehicles, trucks, and buses. Background technique [0002] In the process of producing glass fiber, the raw material of glass fiber drawn from the bushing plate and the thermoplastic resin fiber (polypropylene, polyester) extruded from the extruder pass through a device at the same time. , so that it is evenly mixed and arranged in the previously integrated hybrid roving, and then made into a continuous glass fiber needle felt to directly produce container lining board materials. The technology of impregnating ...

AI Technical Summary

Problems solved by technology

[0004] The technical difficulties in making light-weight wide-width structural panels are mainly due to the difficulty in impregnating the reinforcing materials and resin matrix in the multi-layered chopped strand mat, woven felt, and needle felt in high-temperature melting, and the high-temperature resin has a high viscosity in a molten state. Poor fluidity, narrow bonding path between molten resin fluid and glass fiber surface of rough felt, woven felt and needle felt, long distance, high resistance, slow penetration rate of molten fluid, resulting in insufficient surface area of ​​internal fibers impregnated by molten resin , Therefore, there are more voids left after the fiber surface is impregnated. The specific performance is that the impregnation area on the surface of a single glass fiber bundle or a local fiber aggregate is not thorough enough. The process defects in this high-temperature melting impregnation process cause the internal part of the plate The layer or local structure is broken, resulting in a change in the compactness of the overall structure of the plate, which makes the rigidity and strength of the plate relatively low, thus greatly reducing the mechanical properties of the plate

Especially in the traditional process, high-temperature molten resin fluid is used to directly impregnate multi-layer chopped strand mats, glass fiber woven mats, and needle-punched mats. It is even more difficult to achieve the effect of high-temperature molten resin impregnation thoroughly.

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