Polyurethane plate as well as processing technology and application thereof

Abstract

The invention discloses a polyurethane plate and a processing technology and application thereof. The polyurethane plate comprises a reinforced core layer, an upper surface layer and a lower surface layer are respectively attached to the upper surface and the lower surface of the reinforced core layer, and the reinforced core layer is formed by foaming a polyurethane foaming material stacked on glass fiber gridding cloth. The polyurethane plate is simple in structure, high in strength, convenient to form and good in forming effect, the surface is more attached, the production efficiency can beimproved, and the production cost can be greatly reduced.

Description

Technical field: [0001] The invention relates to the field of materials, in particular to a polyurethane board and its processing technology and application. Background technique: [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 use hot pressing 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...

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 use hot pressing 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 120min to shape, and finally cut and trim 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 and even glue seepage, especially when forming some concave-convex surfaces, it is not easy to fit. In addition, the PU lightweight 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