Single side surface layer compressed wood and preparation method thereof

Abstract

The invention discloses single side surface layer compressed wood and a preparation method for the single side surface layer compressed wood. The single side surface layer compressed wood comprises areserved processing layer, a compact layer, a transition layer and a wood original density layer in sequence, and the reserved processing layer, the compact layer, the transition layer and the wood original density layer are connected naturally by own wood fiber of the wood. The preparation method for the single side surface layer compressed wood comprises the steps that the wood is paved on a padplate after being dried, the temperature of an upper pressing plate and a lower pressing plate is set, and then the pad plate and the wood are put on the lower pressing plate; after paving is finished, the upper pressing plate is made to make contact with the upper surface of the wood to perform preheating; the pressure is set as 6-12 MPa, the wood is compressed, and then pressure maintaining isperformed; the temperature is raised to make the lower pressing plate and the upper pressing plate be of the same temperature; and the pressure is reduced to 1-3 MPa and pressure maintaining is performed, and unloading is performed and the single side surface layer compressed wood is obtained. According to the single side surface layer compressed wood and the preparation method for the single sidesurface layer compressed wood, the processing process has no chemical pollution, the production cost is low, operations are relatively simple and convenient, the single side surface layer compressedwood and the preparation method for the single side surface layer compressed wood have the advantages of high efficiency, environmental protection and the like, tile bending deformation of the singleside surface layer compressed wood is effectively solved, and the surface hardness, flatness, production efficiency and qualified rate of the wood can be further improved.

Description

technical field [0001] The invention belongs to the technical field of wood product production technology, and more particularly relates to a single-sided surface layer compressed wood and a preparation method thereof. Background technique [0002] At present, my country's wood industry is undergoing an important transition from natural forest timber to fast-growing plantation timber. It is a long-term strategy to improve the quality and optimization of fast-growing plantation resources with abundant reserves. It is to solve people's demand for solid wood. The only way to deal with the growing contradiction and the relative shortage of domestic high-quality wood. [0003] One-sided surface compression of wood is an ideal method for improving the function of wood, because for many solid wood products, such as solid wood floors, table tops, chair surfaces, etc., only the mechanical strength of the wood surface in contact with the human body has high requirements. Solid wood-li...

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Problems solved by technology

In the above-mentioned patents and documents, when using the single hot end temperature difference method to produce single-sided surface compressed wood, due to the existence of certain moisture inside the wood, the moisture transfers from the hot end to the cold end during asymmetric heating to form a moisture content gradient, and the single-sided surface compression The structure of the wood itself is asymmetrical, and the compressed wood will inevitably have the problem of tile bending deformation, which will affect the wood yield, and in severe cases, the wood will be scrapped. At the same time, the existence of moisture also makes the internal density distribution of the compressed wood difficult to control, so the use effect is not ideal.

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