Multifunctional laminated veneer composite board and manufacturing method thereof

Abstract

The invention discloses a multifunctional laminated veneer composite board and a manufacturing method thereof, and belongs to the field of building materials. The manufacturing method comprises the following steps of: 1, mixing and dissolving 35 to 79 parts by mass of amidinourea phosphate, 5 to 40 parts by mass of ammonium dihydrogen phosphate, 1 to 10 parts by mass of diammonium hydrogen phosphate and 22 to 35 parts by mass of boric acid to prepare a multifunctional wood protectant treatment solution at the concentration of 6 to 20 percent; 2, performing veneer treatment, namely impregnating an air-dried wood veneer in the treatment solution for 0.5 to 120 hours; 3, performing veneer drying, namely drying the veneer under the condition of room temperature or atmospheric temperature to 170 DEG C until the moisture content of the veneer is 8 to 12 percent; 4, performing gluing; 5, performing assembly; and 6, performing hot-pressing to obtain the multifunctional laminated veneer composite board. The multifunctional laminated veneer composite board and the manufacturing method thereof have the beneficial effects that: the method is simple and easy to operate; production requirements can be met only by adding a veneer impregnation treatment procedure in an ordinary plywood production line; the updating and the upgrading of the conventional technical products of a man-made board enterprise are facilitated; and the products have high added value, and the multifunctional laminated veneer composite board and the manufacturing method thereof are really meaningful for ensuring the fire safety of wood materials.

Description

technical field [0001] The invention relates to a building board, in particular to a multifunctional veneer laminated composite board and a preparation method thereof. Background technique [0002] Laminated veneer composite panels have outstanding advantages such as reasonable structure, convenient processing, crack resistance, shrinkage resistance, twist resistance, and high strength. They can not only use low-quality wood to manufacture board products with excellent performance, but also overcome some shortcomings of solid wood. It can be higher than the physical and mechanical properties of solid wood to a certain extent. For occasions with high quality and high strength requirements, it is widely used, and sometimes it is also used in engineering materials. However, the flammability of wood materials has always been its very prominent shortcoming, which has brought great fire hazards to its application places. At present, relevant national departments have passed manda...

AI Technical Summary

Problems solved by technology

[0004] (1) The flame retardants used in flame-retardant plywood products on the market are mostly inorganic phosphates (such as monoammonium phosphate, diammonium phosphate), boric acid, borax, sulfate, and ammonium polyphosphate with a low degree of polymerization. It has high hygroscopicity, which makes the flame retardant products more hygroscopic and has a great impact on the secondary processing performance, especially the mechanical properties drop significantly under long-term use conditions, which limits its wide application

[0005] (2) In order to obtain a higher flame retardant efficiency for the board, the amount of flame retardant is relatively high, and the effect is single. In order to achieve multiple effects, it is necessary to add more process steps (usually after multiple wood treatments) kind of medicine

However, in applications where anti-corrosion and insect-proof requirements are high, due to the low content of anti-corrosion active ingredients of flame retardants, a high amount of addition is required, resulting in a greater impact of the treatment liquid on the curing of the adhesive