Preparation method of waterproof flame-retardant laminated veneer lumber

A laminated veneer lumber, flame-retardant technology, applied in the direction of veneer presses, wood treatment, manufacturing tools, etc., can solve the problems of poor water resistance, non-fire resistance, easy to be carbonized mechanical properties, etc., to improve waterproof ability , Inhibit combustion, and enhance hydrophobicity

Inactive Publication Date: 2020-09-01
徐非
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a waterproof and flame-retardant laminated veneer lumber in view of the defects of poor water resistance of current laminated veneer lumber, non-resistance, easy carbonization and poor mechanical properties when burning in fire. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Log planks are preferably: pine

[0032] Preparation of halogenated reaction solution:

[0033] Shredded coconut and rice husk are put into the pulverizer in the mass ratio of 10:1, pulverized and mixed into the mixture, and the mixture and the sodium hydroxide solution with a mass fraction of 6% are put into the beaker at a mass ratio of 1:10, and the beaker Put it into a water bath with a water bath temperature of 80°C, and stir with a stirrer at a speed of 300r / min for 60min at a constant temperature to prepare a mixed slurry;

[0034] The above-mentioned mixed slurry and sodium persulfate powder are dropped into the reactor at a mass ratio of 30:1, stirred with a stirring device at a speed of 300r / min for 30min, and suction filtered after stirring to obtain the filter residue, followed by cleaning the filter residue with propylene glycol and distilled water for 3 times, The filter residue and the hydrochloric acid solution with a mass fraction of 3% are put into a ...

Embodiment 2

[0042] Log planks are preferably: Poplar

[0043] Preparation of halogenated reaction solution:

[0044] Shredded coconut and rice husk are put into the pulverizer according to the mass ratio of 10:1, pulverized and mixed and put into the mixture, and the mixture and the sodium hydroxide solution with a mass fraction of 8% are put into the beaker according to the mass ratio of 1:10, and the beaker Put it into a water bath with a water bath temperature of 90°C, and stir with a stirrer at a speed of 350r / min for 70min at a constant temperature to prepare a mixed slurry;

[0045] The above-mentioned mixed slurry and sodium persulfate powder are dropped into the reaction kettle at a mass ratio of 30:1, stirred with a stirring device at a speed of 350r / min for 35min, and suction filtered after stirring to obtain a filter residue, followed by cleaning the filter residue with propylene glycol and distilled water 4 times, The filter residue and the hydrochloric acid solution with a m...

Embodiment 3

[0053] Log planks are preferably: oak

[0054] Preparation of halogenated reaction solution:

[0055] Shredded coconut and rice husk are put into the pulverizer in the mass ratio of 10:1, pulverized and mixed into the mixture, and the mixture and the sodium hydroxide solution with a mass fraction of 10% are put into the beaker at a mass ratio of 1:10, and the beaker Put it into a water bath with a water bath temperature of 100°C, and stir with a stirrer at a speed of 400r / min for 80min at a constant temperature to prepare a mixed slurry;

[0056] The above-mentioned mixed slurry and sodium persulfate powder are dropped into the reaction kettle at a mass ratio of 30:1, stirred with a stirring device at a speed of 400r / min for 40min, and suction filtered after stirring to obtain a filter residue, followed by cleaning the filter residue with propylene glycol and distilled water for 5 times, The filter residue and the hydrochloric acid solution with a mass fraction of 5% are drop...

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PUM

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Abstract

The invention discloses a preparation method of a waterproof flame-retardant laminated veneer lumber, and belongs to the technical field of plate preparation. According to the preparation method of the invention, coconut shreds and rice husks are mixed and then subjected to hot alkali liquor and acid liquor soaking and high-temperature and high-pressure treatment, so that fiber components in the coconut shreds and the rice husks are separated, and meanwhile, some fibers are decomposed to a certain extent, so that the length of a fiber chain is shortened, the overall specific surface area of the fibers is increased, the mechanical property of the lumber is enhanced; the plant fibers are subjected to oxidation treatment, hydroxyl groups on the surfaces of the fibers are oxidized to generatecarboxyl groups, aluminum ion components are complexed and adsorbed, and the mechanical property of the laminated veneer lumber is improved. According to the preparation method, the plant fibers are subjected to oxidation treatment, so that the hydroxyl groups in the fibers generate the carboxyl groups; aluminum ions are complexed and adsorbed; then the aluminum ions generate aluminum oxide; aluminum oxide particles are dispersed among the fiber components; the surface of the laminated veneer lumber is covered with the fiber components, the laminated veneer lumber is protected, and therefore,part of air is isolated when the laminated veneer lumber burns in fire, and the laminated veneer lumber is prevented from being burnt.

Description

technical field [0001] The invention discloses a preparation method of a waterproof and flame-retardant laminated veneer lumber, belonging to the technical field of plate preparation. Background technique [0002] Laminated veneer lumber is a material formed by laminating thick veneers along the direction of the grain, hot pressing and gluing, and then sawing. The research on laminated veneer lumber as a new type of board began in the early 1970s. At that time, the demand for wood in North America increased rapidly, and the price of high-quality wood was high. However, due to the rapid development of the petroleum industry, the price of its by-product synthetic resin continued to fall. It has promoted the rapid development of the production of laminated veneer lumber by using small-diameter logs. People pay more and more attention to the utilization of fast-growing forests; while artificial fast-growing forest materials such as poplar and Chinese fir have the disadvantages ...

Claims

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Application Information

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IPC IPC(8): B27K5/00B27K5/06B27D3/00B27G11/00B27D5/00
CPCB27D3/00B27D5/006B27G11/00B27K5/0085B27K5/06
Inventor 徐非
Owner 徐非
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