Sandwiched composite material for top skirt plates and floors of passenger cars

Abstract

The invention provides a sandwiched composite material for top skirt plates and floors of passenger cars. The sandwiched composite material comprises an upper aluminum plate, glass fiber reinforced thermoplastic and a lower aluminum plate which are arranged sequentially from top to bottom. The glass fiber reinforced thermoplastic is bonded with the upper aluminum plate and the lower aluminum plate by polyethylene film through hot melting, so that the symmetrically-structured high-strength sandwiched composite material for skirt plates and the floors of passenger cars is formed. When used for top skirt plates, the sandwiched composite material is 2.5-5 mm in thickness and 1200-2000 g/m<2> in surface density; when used for floors, the sandwiched composite material is 6-15 mm in thickness and 5000-8000 g/m<2> in surface density. The sandwiched composite material for top skirt plates and the floors of passenger cars has the advantages that the VOCs (volatile organic compounds) content conforms to national standards specified for environment-friendly composite materials; the sandwiched composite material is low in surface density and has remarkable lightweight advantage.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a sandwich composite material used for roof skirts and floors of passenger cars, specifically a sandwich composite material with low odor, high strength, low surface density, and volatile organic compound content in line with national standards. Environmentally friendly composite materials are also used for passenger car roof skirts and floors. Background technique [0002] The roof skirt and floor of passenger cars have undergone multiple material changes, and the requirements for passenger cars are also tending to be lightweight. In order to meet the lightweight of passenger cars, various lightweight top skirts and floors have emerged one after another. In the prior art, polyvinyl chloride (PVC) or aluminum honeycomb sandwich structure is used to make passenger car floors. The above two structures meet the requirements of light weight, but the performan...

AI Technical Summary

Problems solved by technology

In the prior art, polyvinyl chloride (PVC) or aluminum honeycomb sandwich structure is used to make passenger car floors. The above two structures meet the requirements of light weight, but the performance of polyvinyl chloride (PVC) material decreases at low temperatures, and it is brittle. There is a major problem in the installation process of the aluminum honeycomb sandwich structure, and special treatment needs to be carried out on the screw installation part to ensure sufficient nailing force. The installation process is more complicated, which increases the labor intensity and working hours of the assembly workers. Difficult to implement high-volume applications

[0003] Chinese patent CN 205632685 U discloses a passenger car floor, which is an integrated structure, including an upper carbon fiber fabric epoxy resin-based composite material layer, a polyurethane foam layer and a lower carbon fiber fabric epoxy resin layer arranged sequentially from top to bottom The base composite material layer is light in unit area, which is conducive to the weight reduction of the whole vehicle and realizes the characteristics of light weight. However, the core material is a polyurethane foam layer, which needs to be bonded with the epoxy resin-based composite material layer through an adhesive , this process will produce volatile substances that are harmful to the body, which is not conducive to the health of workers and the protection of the environment, and the recovery of polyurethane foam requires special equipment and solvents for treatment, it is difficult to achieve 100% recovery, resulting in waste of resources

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