Wooden functionally graded laminate for high dimensional stability structure and preparation method thereof

Abstract

The invention discloses a woodiness function gradient laminate for a high size-stability structure and a manufacturing method of the woodiness function gradient laminate for the high size-stability structure. The woodiness function gradient laminate is characterized in that fast-growing woodiness recombination units serve as core layers, high-strength woodiness recombination units or bamboo recombination units serve as outer layers, inorganic solutions soaked by the units on the adjacent layers are in contact and are hot-pressed to produce gel, and the woodiness function gradient laminate is formed. The woodiness function gradient laminate has the advantages that use materials are structural woods or low-quality man-made forest small-diameter grade woods or branch woods or leftover materials or bamboo woods, the product structure is reasonable and designable, the material use rate is high, the product cost is low, the mechanical strength is high, the size stability is high, the service life is long, the product is anticorrosion and capable of preventing insects, and has the functionality such as inflaming retarding, and the woodiness function gradient laminate can be used as building wall materials, a floorboard or a roof board; the surfaces of the materials are covered with a whole chemical woodiness single plate to serve as the surface layer and the secondary surface layer, the attractive appearance decoration effect can be achieved, and the woodiness function gradient laminate can be completely used for replacing traditional woodiness laminate materials such as a plywood and laminated veneer lumber and can be used as furniture and home decoration materials.

Description

technical field [0001] The invention relates to the field of wood structures, in particular to a wood functional gradient laminate for high dimensional stability structures and a preparation method thereof. Background technique [0002] At present, the timber supply of my country's forest resources is insufficient, especially high-quality timber, and about half of the timber raw materials used in the timber industry need to be imported every year. With the advancement of urbanization and the improvement of people's living standards, there are a large number of gaps in structural materials in the field of domestic building structures and decoration of people's home furniture. In the current situation of my country's timber resources, there are a large number of fast-growing timber and bamboo resources, but they have the disadvantages of low strength, many defects, poor dimensional stability, thin hollow wall, and low utilization rate. These raw materials are mostly used as ra...

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Problems solved by technology

[0010] The present invention provides a wood functionally graded laminated board with high dimensional stability structure and its preparation method, which solves the following technical problems: (1) For the above-mentioned traditional wooden laminated board, non-renewable polymer woodworking adhesives are used to consume limited mineral resources; resources, and poor environmental protection performance, etc., the present invention overcomes this deficiency by using an inorganic solution to contact hot-pressing reaction to generate a gel, so that the recombined units are bonded to each other; The manufactured wooden laminates have poor mechanical properties and durability and short service life; the products do not have anti-corrosion, insect-proof and flame-retardant functions, or need to add corresponding chemical anti-corrosion and insect-proof agents, flame retardants and other modifiers; high-quality wood Laminates are usually made of high-quality tree species wood, or plywood is made after chemical modification of tree species wood with poor general quality and material. Generally, the finished product is relatively high. The gel replaces the original adhesive, and the inorganic gel is dispersed in the interior and interface of the recombined unit, which significantly improves the physical and mechanical properties, durability, functionality and cost controllability of the product, and solves the problem of the original adhesive and other wood (3) Aiming at the low utilization rate of traditional wooden laminated board materials, and the preparation of cut fibers from raw materials of traditional corresponding products, resulting in poor quality of finished products and low service life, the product of the present invention, its core layer and outer layer The unit is formed by twisting wood and bamboo raw materials through twisting equipment, which can effectively use small-diameter fast-growing wood and leftover materials. The twisting processing method of the unit follows the arrangement of wood fibers, effectively ensuring the quality and use of the product. (4) Aiming at problems such as uneven thickness, poor surface flatness, depressions or pits on the board surface, and poor appearance quality of traditional bamboo laminated board products, the product of the present invention adds a whole piece of wooden veneer to both sides of the board. As the outer layer, it improves its appearance and decorative effect

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