A kind of composite plate, preparation method and application thereof

Abstract

The invention discloses a composite board. The composite board sequentially includes a surface layer, a sandwich layer, a middle sandwich layer, a bottom sandwich layer and a bottom layer from top to bottom, and all layers are connected in a hot pressing manner. A method for preparing the composite board comprises the following steps: paving the bottom layer on a die; paving the bottom sandwich layer on the upper surface of the bottom layer; paving the middle sandwich layer on the upper surface of the bottom sandwich layer; paving the sandwich layer on the upper surface of the middle sandwich layer; paving the surface layer on the upper surface of the sandwich layer, covering the die, and performing hot pressing and pressure maintaining; depressurizing and exhausting or firstly cooling to ambient temperature and releasing pressure in a segmentation manner to prepare the composite board. The density, strength, elasticity modulus, surface quality and various property indexes of the composite board can meet a composite container baseboard with industry standards of the international container, and the composite board can be used as the container baseboard, has strong design, and can reasonably select thickness and density of the surface layer and the core material according to actual demands, thereby realizing the best economic effect.

Description

technical field [0001] The invention relates to the technical field of manufacturing container bottom plates, in particular to a composite plate, a preparation method and an application thereof. Background technique [0002] The container floor is the main load-bearing structure of the container. The container floor manufacturing industry requires the floor to have high mechanical properties, precise processing dimensions, and good impact resistance. For a long time, the container floor mainly uses high-density hard broad-leaved wood grown in tropical rain forests as the main raw material. After being cut into veneers by large-diameter logs, multi-layer veneers are formed into embryos and hot-pressed into plywood. Since the growth cycle of high-density broad-leaved tree species is very long, it generally takes 50 years or even longer, and the demand for container floor is increasing day by day. In order to protect the world's ecological environment and reduce the consumptio...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN93115652.0 discloses a production method of bamboo container flooring. In this method, the bamboo is cut into strips of equal width and thickness, and the strips are arranged in parallel to form sheets, which are dipped in a mixed solution of preservative and phenolic resin and stacked. The bamboo container floor produced can pass the test requirements of international containers, but the utilization rate of bamboo is low, the manufacturing is complicated, and the processing efficiency is low, which leads to the high cost of bamboo container floor, limited production capacity, and cannot be used on a large scale. marketization

[0004] Chinese patent ZL200820121351.8 discloses a container with high impact resistance. This patent uses powder-coated polyester powder instead of paint to coat the surface of the container, which improves the weather resistance, corrosion resistance and toughness of the container. Although the surface of the container processed by this method has a certain impact resistance effect, the polyester powder will fall off and be damaged during use, and it is still easy to cause damage to the bottom plate

This method expands the selection of container materials, but does not improve the impact of the container floor

Images