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Oriented strand board (OSB)

A technology of oriented strand board and substrate layer, which is applied in the field of oriented strand board for furniture manufacturing and flooring, which can solve the problems of poor thickness stability, uneven surface, and inability to apply oriented strand board manufacturing, and achieve the effect of improving flatness

Inactive Publication Date: 2016-10-05
广西南宁绿园北林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But the existing oriented strand board has an obvious shortcoming, that is, the thickness stability is poor, mainly because the size of the shavings is not equal, the direction and angle of the shavings in the paving process cannot be guaranteed to be completely horizontal and uniform, and a certain density will be formed. Gradient, which has some influence on thickness stability, causing surface unevenness
[0008] In addition, there are certain requirements for the size of the shavings in the prior art, so that the remaining waste from the processing of plywood or rotary cut board cannot be used in the manufacture of oriented strand board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Adjust the alkali lignin with sulfuric acid to a pH value of 2.0 to form an insoluble precipitate, plate and frame press filter, dry, and finally pulverize into a powder with a mesh number of 90-250 mesh to obtain the alkali lignin extracted by acidification; Mix and stir the alkali lignin extracted by acidification and urea-formaldehyde resin adhesive with a weight ratio of 5:100, and finally prepare a fine-grain layer waterproof adhesive. Then mix 1 part of fine particle layer waterproof glue for every 5 parts of fine particle layer to make it thin.

[0039]Among them, the composition, ratio and glue-making process of the urea-formaldehyde resin adhesive are as follows: formaldehyde 1800Kg plus urea 700Kg, polyvinyl alcohol 15Kg, melamine 25Kg, adjust alkali with 30% alkaline water, pH value 8.5, heat up, keep at 90 ° C ± 50 Minutes later, cool down to 88°C, turn off the cooling water, start to adjust 20% formaldehyde water, divide into three times, the time is 40 min...

Embodiment 2

[0045] The pH value in Example 1 is adjusted to 1.5 or 2.5, and basically satisfactory results can still be obtained after testing.

Embodiment 3

[0047] The ratio of acidified extracted alkali lignin and urea-formaldehyde resin adhesive in Example 1 is adjusted to 4:100 or 6:100, and basically satisfactory results can be obtained through testing.

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PUM

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Abstract

The invention discloses an oriented strand board (OSB). The OSB comprises an OSB substrate layer, a finishing coat and a fine-grain layer, wherein the fine-grain layer is located between the OSB substrate layer and the finishing coat, a basic unit for forming the fine-grain layer is OSB fines with the grain size of 20 to 200 meshes, and the OSB substrate layer is prepared from laminated wood wastes or rotary-cut plate wastes through laminating. The fine-grain layer is additionally arranged, so that the smoothness of the surface of the OSB is improved greatly; and waterproof treatment on the fine-grain layer can be very easily achieved under the condition that the formaldehyde release volume does not exceed standard.

Description

【Technical field】 [0001] This invention relates to oriented strand boards, especially oriented strand boards for flooring, furniture manufacture and the like. 【Background technique】 [0002] OSB (Oriented Strandboard) board, also known as oriented strand board, is also called OSB board in China. It is a synthetic wood. The source of "OSB"---the scientific name of "OSB board" is Oriented Strand Board (0SB), which is a new type of board that came from Europe and developed rapidly internationally in the 1970s and 1980s. The application of "OSB board" (also known as "EGGER board") in furniture has been unprecedentedly developed. Many large furniture companies have begun to use "OSB" to make furniture. The reason why it is popular among consumers is that it is formaldehyde-free. It is strong and durable, and it is lighter in weight and better in flatness than furniture made of medium-density fine particle boards. [0003] OSB board is made of small-diameter wood, thinning wood...

Claims

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Application Information

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IPC IPC(8): B32B21/08B32B21/02B32B33/00B32B37/06B32B27/42B32B27/04B32B27/18E04F15/02E04F15/04E04F15/18C09J161/24C09J197/00C08G12/38
Inventor 肖文飞孙润仓袁同琦王飞虎倪能强
Owner 广西南宁绿园北林木业有限公司