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Manufacturing method of low density fiberboard

A fiberboard, low-density technology, used in the preparation of low-density fiberboard, fiberboard, low-density fiberboard field, can solve the problems of sound absorption, sound insulation, low production capacity of hollow particleboard, unsatisfactory development of hollow particleboard, etc.

Active Publication Date: 2013-06-05
HUNAN SENHUA WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now some companies have introduced European production lines to produce hollow particleboards with light weight, but the production capacity of hollow particleboards is low, the strength is poor, and the sound absorption and sound insulation effects are not good, so the development of hollow particleboards is still quite unsatisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 Preparation of low-density fiberboard of the present invention

[0020] It is implemented on the existing production line of medium and high density boards. The difference is that the adhesive is added according to the following dosage when sizing the fiber: 414 kg of adhesive is added per 195.5 kg of fiber (the solid content of the adhesive is 50%); under the following conditions Hot pressing: hot pressing temperature 180°C, closing time of the hot pressing machine is 27 seconds, hot pressing time is 16 minutes, hot pressing pressure is 15 kg / cm2; Light machine sanding, that is. After testing, the density of the fiberboard prepared in this example is 346.375 kilograms per cubic meter (the moisture content of the board is 10%), calculated according to the output rate of 85% after processing.

Embodiment 2

[0021] Embodiment 2 Preparation of low-density fiberboard of the present invention

[0022] It is implemented on the existing medium and high-density board production line, the difference is that the adhesive is added according to the following amount when sizing the fibers: 360 kg of adhesive is added per 120 kg of fiber (the solid content of the adhesive is 50%); Hot pressing under the following conditions: hot pressing temperature 185°C, closing time of the hot pressing machine is 28 seconds, hot pressing time is 18 minutes, hot pressing pressure is 16 kg / cm2; Sand with a sander and that's it. After testing, the density of the fiberboard prepared in this example is 255 kilograms per cubic meter (the moisture content of the board is 10%), and the yield rate after processing is 85%.

Embodiment 3

[0023] Embodiment 3 Preparation of low-density fiberboard of the present invention

[0024] It is implemented on the existing production line of medium and high density boards. The difference is that the adhesive is added according to the following dosage when sizing the fiber: 595 kg of adhesive is added per 230 kg of fiber (the solid content of the adhesive is 50%); under the following conditions Hot pressing: hot pressing temperature 175°C, closing time of the hot pressing machine is 20 seconds, hot pressing time is 15 minutes, hot pressing pressure is 14 kg / cm2; Light machine sanding, that is. After testing, the density of the fiberboard prepared in this example is 448.375 kilograms per cubic meter (the moisture content of the board is 10%), calculated according to the yield rate of 85% after processing.

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PUM

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Abstract

The invention discloses a low density fiberboard and a preparation method thereof. The density of the low density fiberboard of the invention is 250-450 kilograms per cubic meter. The preparation method comprises the following steps: wood chipping, fiber grinding, fiber sizing, fiber paving, preloading, hot processing, trimming and sanding; wherein, the fiber and the adhesive is added in a mass ratio of 1:1.6-3 when the fiber is carried out a sizing; the heating is carried out under the following conditions: the hot-pressing temperature is 175-185 DEC C, the closing time of the hot-pressing is 20 to 28 seconds, the hot-pressing time is 15 to 18 minutes, the hot-pressing pressure is 14 to 16 kilogram / square centimeters. The invention, by adopting the current middle and high density production line, produces and obtains the low density fiberboard with a density of 250 to 450 kilograms per cubic meter. The low density fiberboard has the advantages of a good sound-absorbing and deafening performance and can be used as the gate core of the wooden gate and core material of the diaphragm walls.

Description

technical field [0001] The invention relates to a fiberboard, in particular to a low-density fiberboard, and also relates to a preparation method of the low-density fiberboard, which belongs to the field of wood processing. Background technique [0002] The current density of fiberboard (also known as wood-based panel) is above 0.6 (that is, 600 kilograms per cubic meter). It is also used in some products with strength requirements. With the expansion of the scope of use of fiberboard, the disadvantages of high-density fiberboard in some industries have fully emerged. For example, the core board used for doors will cause the door to be too heavy; As for the partition board, one is that it is too heavy, investors have increased the basic investment and other problems, and the other is that there are defects such as no sound insulation. [0003] In order to understand the above problems, many companies have also begun to study the production technology of low-density fiberbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/04B27N1/02B27N3/08
Inventor 丁万君吴子良陈万利
Owner HUNAN SENHUA WOOD