Composite board as well as preparation method and application thereof

Abstract

The invention discloses a composite board as well as a preparation method and application thereof. The composite board comprises a first non-woven fabric layer, a first glass fiber felt layer, a first foam plate layer, a second non-woven fabric layer, a second foam plate layer, a second glass fiber felt layer and a knitting material layer, wherein the first glass fiber felt layer is arranged on the upper surface of the first non-woven fabric layer, the first foam plate layer is arranged on the upper surface of the first glass fiber felt layer, the second non-woven fabric layer is arranged on the upper surface of the first foam plate layer, the second foam plate layer is arranged on the upper surface of the second non-woven fabric layer, the second glass fiber felt layer is arranged on the upper surface of the second foam plate layer, and the knitting material layer is arranged on the upper surface of the second glass fiber felt layer. The composite board provided by the invention has the advantages of high intensity, high temperature resistance and sound absorption and sound insulation.

Description

technical field [0001] The invention belongs to the technical field of material processing, in particular, the invention relates to a composite plate and its preparation method and application. Background technique [0002] Car roofs are mainly divided into two forming processes, namely wet forming process and dry forming process; wet forming process is further divided into wet one-step forming process and wet two-step forming process. The above forming processes are described below Make an introduction: [0003] (1) Dry molding process, also known as hot material cold molding process, the raw materials are mainly divided into two parts, namely PU composite board and composite knitted fabric. The main process is: PU composite board is heated (oven It is recommended to set the temperature at 240-280°C, and the surface temperature of the raw material after heating and baking is (190±10)°C), and mold the PU composite board after the composite knitted fabric is tensioned and he...

AI Technical Summary

Problems solved by technology

However, the glue of the wet two-step molding process is polyurethane thermosetting glue, which needs to absorb the humidity in the air for bonding. IPTV risk: There is boundary thinning in the ceiling (facilitating assembly and airbag blasting), and the boundary of the dry and wet process ceilings is compressed beyond the limit due to foam boards, resulting in internal structure damage and a decrease in ceiling strength, resulting in the risk of after-sales ceilings coming off the rubber strips

[0006] Therefore, the existing car roof molding process needs further research

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