High-strength polyurethane plate as well as processing technology and application thereof

Abstract

The invention discloses a high-strength polyurethane plate as well as a processing technology and application thereof. The high-strength polyurethane plate comprises a reinforcing core layer, an uppersurface layer and a lower surface layer are attached to the upper surface and the lower surface of the reinforcing core layer respectively, and the reinforcing core layer is formed by foaming a polyurethane foaming material mixed with glass fiber short fibers. The high-strength polyurethane plate is simple in structure, high in strength, convenient to form, good in forming effect, capable of enabling the surface to be more attached, simple in machining process and capable of greatly reducing the production cost.

Description

Technical field: [0001] The invention relates to the field of materials, in particular to a high-strength polyurethane plate and its processing technology and application. Background technique: [0002] In the prior art, the polyurethane sheet needs a certain thickness to ensure its strength and toughness. Based on this defect, especially the polyurethane sheet within 2mm is very brittle and has poor toughness, which lacks application value in many scenarios. [0003] For example, car sun visors, in order to achieve better toughness and strength, usually adopt the hot pressing method to produce car sun visors, that is to say, the raw material of traditional car sun visors is PU lightweight foam. Apply polyurethane glue through the equipment, then put glass fiber felt on both sides of the foam board, then put hot cloth, finally put the front fabric on the front, put the back fabric on the back, and then put it on a high-temperature press, after 150°C High-temperature 20Mpa p...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, the polyurethane sheet needs a certain thickness to ensure its strength and toughness. Based on this defect, especially the polyurethane sheet within 2mm is very brittle and has poor toughness, which lacks application value in many scenarios

[0003] For example, car sun visors, in order to achieve better toughness and strength, usually adopt the hot pressing method to produce car sun visors, that is to say, the raw material of traditional car sun visors is PU lightweight foam. Apply polyurethane glue through the equipment, then put glass fiber felt on both sides of the foam board, then put hot cloth, finally put the front fabric on the front, put the back fabric on the back, and then put it on a high-temperature press, after 150°C High-temperature 20Mpa pressure extrusion for about 120 minutes to form, and finally cut and trimmed to make finished products, but this production method is cumbersome, requires a lot of raw materials, and the amount is also large, and the process is cumbersome, requiring high-temperature pressing and molding, and the cost is high. Moreover, about 6 people are needed to complete the production process, which results in high labor costs and low production efficiency.

Moreover, when the fabric is compounded, it is easy to produce wrinkles or even glue seepage, especially when forming some concave-convex surfaces, it is not easy to fit. In addition, the PU light foam is easy to delaminate for this structure of the board, resulting in a low pass rate , can only reach about 90%, and it is easy to deform after molding and curing