Light fiber-reinforced thermoplastic plate used for high-performance passenger vehicle bottom protection plate and preparation technology thereof

The invention relates to the field of composite materials for automobile exterior trimming parts, in particular to a light fiber-reinforced thermoplastic plate used for a high-performance passenger vehicle bottom protection plate and a preparation technology thereof. The plate comprises a surface material layer, a netty hot melt adhesive film, an anti-impact inflaming retarding layer, a sound absorbing layer, an anti-impact inflaming retarding layer, a netty hot melt adhesive film and a surface material layer from top to bottom in sequence. According to the technology, after thermoplastic resin fibers and reinforced fibers in different proportions are subjected to opening by an opener, cross lapping is carried out, mixed powder of polyolefin rubber powder and inflaming retarding filler in different proportions is added by a powder distributor, 140-degree infrared roasting is carried out, and finally, a fiber-reinforced thermoplastic felt and the like are obtained after the needling of different needle punching technologies. The light fiber-reinforced thermoplastic plate has excellent anti-impact, sound-absorbing and inflaming retarding performances, and effectively solves various problems which are encountered when the existing common bottom protection plates in the market are used; the preparation technology is simple, convenient, feasible, flexible and varied, the performances of products are designed according to the practical application needs, and the production efficiency is optimized.