Soft material single-board materials and wooden products with surface hardness improve

A veneer and soft material technology, applied in the field of wood processing, can solve problems such as stress concentration, damage, and affecting the compression rate of the surface layer, and achieve the effects of improving surface hardness and wear resistance, increasing application range, and increasing application value

Active Publication Date: 2006-10-25
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] First, it is difficult to control the compressibility of the surface layer stably, which leads to the instability of the surface properties of the final product
Compression rate is the most important factor affecting surface properties. Wood is an inhomogeneous material. Although the surface of the board is deformed in an instant under the action of external force, the weak part inside the surface will also deform at the same time. This deformation not only affects the surface. The compressibility of the layer, and after the product is formed, due to the existence of residual deformation, as long as the conditions are appropriate during the application process, the residual deformation will be released, affecting the stability and performance of the final product;
[0010] Second, due to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Low-molecular-weight phenolic resin: The molar ratio of formaldehyde to phenol is 1.5, so that formaldehyde and phenol are condensed in an aqueous solution of pH 9.42, and the water dilution at the end of the condensation is 1900% (20°C). Water dilution calculation formula: water dilution (%) = added water (ml) / resin amount (ml) × 100% (the same below).

[0044] The resin aqueous solution has a concentration of 5%, and the sapwood veneer is impregnated with the resin aqueous solution to make the resin dry matter in the veneer 5%. Formula for calculating dry matter mass: dry matter mass (%) = (dry weight after soaking-dry weight before soaking) / dry weight before soaking × 100% (the same below). Hot-pressing compression process conditions: temperature 140°C, time 10min, compression rate of veneer material 60%-65% (compression rate is controlled by thickness gauge, the following test is the same). The test result shows that the average surface hardness is 18.0N / mm 2 , The ma...

Embodiment 2

[0046] Low-molecular-weight phenolic resin: The molar ratio of formaldehyde to phenol is 1.5, so that formaldehyde and phenol are condensed in a pH 10.68 aqueous solution, and the water dilution at the end of the condensation is 600%.

[0047] The concentration of the resin aqueous solution is 15%, and the dry resin content in the veneer after the treatment is 13%. Hot-press compression process conditions: temperature 140℃, time 10min, compression rate of veneer material 45%-50%. The test result shows that the average surface hardness is 13.5N / mm 2 , The maximum value is 18.7N / mm 2 , The minimum value is 7.2N / mm 2 , Deformation recovery rate is 19%.

Embodiment 3

[0049] Low-molecular-weight phenolic resin: The molar ratio of formaldehyde to phenol is 1.5, so that formaldehyde and phenol are condensed in a pH 9.86 aqueous solution, and the water dilution at the end of the condensation is 600%.

[0050] The concentration of the resin aqueous solution is 15%, and the dry resin mass in the veneer after the treatment is 14%. Hot-press compression process conditions: temperature 140℃, time 10min, compression rate of veneer material 60%-65%. The test result shows that the average surface hardness is 16.6N / mm 2 , The maximum value is 26.2N / mm 2 , The minimum value is 7.0N / mm 2 , Deformation recovery rate is 7%.

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PUM

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Abstract

The invention provides a soft veneer material and wood products with improved surface hardness. The soft wood veneer material of the present invention is made by thermally compressing the veneer obtained by rotary cutting the soft wood log, and the thermal compression rate of the veneer is more than 45%, which can be used as the surface material. The wood product with improved surface hardness provided by the present invention is covered with the surface material made of the above-mentioned veneer material. On the premise of meeting the requirements of surface hardness and wear resistance, the product cost is greatly reduced, which is conducive to the realization of industrial production. And the value-added and comprehensive utilization of soft wood, especially fast-growing plantations. The present invention also provides a manufacturing method of the above-mentioned veneer material and wood products.

Description

Technical field [0001] The present invention relates to the field of wood processing, and in particular provides a wood product obtained by processing soft wood, including veneer material and wood products made of the veneer material with significantly improved surface hardness. The present invention also provides related Processing Technology. Background technique [0002] For cost and economic durability considerations, non-wood surface decoration materials have occupied a larger market in home decoration, such as melamine impregnated paper, due to its high hardness and good wear resistance, and at the same time heat resistance. Chemical corrosion, durability, etc., are widely used on furniture and other surfaces; currently the more popular laminate flooring, the surface is also made of wear-resistant impregnated paper; and some furniture accessories also use wood grain paper as the surface covering material . But in fact, decorative paper such as impregnated paper is difficult...

Claims

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Application Information

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IPC IPC(8): B27K7/00B27J5/00B27D1/02
Inventor 吴玉章吕建雄张久荣孙振鸢
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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