Fiberboard manufacturing method

A manufacturing method and fiberboard technology, which are applied in the field of fiberboard manufacturing, can solve the problems of poor wear resistance, irreparable sheet materials, and high formaldehyde content, and achieve the effects of improving flatness, avoiding non-waterproof and high flatness.

Inactive Publication Date: 2016-06-22
广西南宁绿园北林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But moisture-proof cannot solve the fundamental problem, once the board is blistered, it cannot be repaired
This kind of board also has some disadva...

Method used

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  • Fiberboard manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]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 the waterproof adhesive for the fiberboard layer. Then mix 1 part of fiberboard layer waterproof glue for every 5 parts of fiber glue to make it thin. Among them, viscose is reacted by urea and formaldehyde in a weight ratio of 4:6, heated up at 90 and kept for one hour, then added 20% formic acid, reacted for 1 hour, and then added 30% NaOH to make the pH value reach 5.0, React for one hour to obtain the intermediate, then add 15% urea in an amount of 10 parts by weight of urea per 100 parts by weight of the intermediate, react for 20 minutes, and stop the reaction to form...

Embodiment 2

[0040] Adjust the pH value in Example 1 to about 1.5 or 2.5, and basically satisfactory results can still be obtained after testing.

Embodiment 3

[0042] 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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Abstract

The invention discloses a fiberboard/particle board manufacturing method. Before pressing the synthetic fiberboard/particle board, the separated wood fibers or fiber bundles are treated with waterproof glue, and the waterproof glue treatment is firstly mixed with waterproof glue and fiber glue to form Sprayable thin glue, and then spray it on the filamentous fiber with a nozzle at room temperature, stir the fiber to make it uniform; then press the above-mentioned treated fiber into fiberboard/particle board; the waterproof glue is acidified extraction A mixture of alkali lignin and urea-formaldehyde resin adhesive. Due to the use of special waterproof glue to waterproof the fiberboard/particle board layer, the fiberboard/particle board layer has waterproof properties, and its formaldehyde content has been tested to be lower than the value required by the national standard. This kind of waterproof fiberboard/particle board has high flatness, which can greatly improve the flatness of the surface of the solid wood composite board, reaching the same level as the reinforced composite board, while retaining various advantages of the solid wood reinforced board.

Description

【Technical field】 [0001] The invention relates to a method for manufacturing a fiberboard, in particular to a method for manufacturing a fiberboard used for floors and furniture boards. 【Background technique】 [0002] Existing boards such as boards for flooring and furniture manufacturing mainly include wood composite boards and reinforced composite boards. [0003] The solid wood composite board is made of cross-laminated tree boards, which overcomes the disadvantage of unidirectional isotropy of the solid wood floor, has a small dry shrinkage and wet expansion rate, has good dimensional stability, and retains the natural wood grain and comfortable comfort of the solid wood floor. Foot feeling. Because natural wood has texture and structural defects, such as knots, insect damage, cracks, etc., these defects will cause the surface of the board to be uneven, affecting the appearance and even affecting the use. The cost of dealing with these defects is extremely high, and it...

Claims

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Application Information

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IPC IPC(8): B27N1/02
Inventor 肖文飞孙润仓袁同琦王飞虎邱金城
Owner 广西南宁绿园北林木业有限公司
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