Method for producing low-formaldehyde medium-density fiberboard

A production method and medium-density technology, which is applied in the field of wood resource utilization, can solve the problems of high formaldehyde residue, large expansion coefficient, and low environmental protection coefficient, and achieve low formaldehyde residue, reduced shrinkage rate, and reduced free formaldehyde content. Effect

Active Publication Date: 2016-01-06
霸州市郭仕智能家居科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing medium density fiberboards have problems such as poor moisture resistance, large expansion coefficient after absorbing water, poor nail holding power, large amount of glue, high residual formaldehyde, and low environmental protection factor to a certain extent.

Method used

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  • Method for producing low-formaldehyde medium-density fiberboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0022] A kind of production method of low-aldehyde medium density fiberboard, concrete steps are as follows:

[0023] (1) Chipping of raw materials: Send the residues of wood processing including slats and waste veneers to the conveyor chain, and then enter the drum chipper to cut into pieces to obtain wood chips;

[0024] (2) Impurity removal and screening: Use a magnet device to remove metal objects mixed in the wood chips, screen the wood chips through a screening machine, remove debris, and separate the oversized wood chips to obtain uniform wood chips, and wash the wood chips with water washing equipment. Remove mud, sand and other impurities contained in wood chips;

[0025] (3) Cooking: Put the wood chips obtained in step (2) into a vertical cooking vat for cooking. In the vertical cooking vat, the wood chips are cooked and softened under saturated steam at a temperature of 130 ° C. The cooking time is 6 minutes;

[0026] (4) wax application heat grinding: liquid wax i...

Embodiment 2

[0033] A kind of production method of low-aldehyde medium density fiberboard, concrete steps are as follows:

[0034] (1) Chipping of raw materials: Send the residues of wood processing including slats and waste veneers to the conveyor chain, and then enter the drum chipper to cut into pieces to obtain wood chips;

[0035] (2) Impurity removal and screening: Use a magnet device to remove metal objects mixed in the wood chips, screen the wood chips through a screening machine, remove debris, and separate the oversized wood chips to obtain uniform wood chips, and wash the wood chips with water washing equipment. Remove mud, sand and other impurities contained in wood chips;

[0036] (3) Cooking: Put the wood chips obtained in step (2) into a vertical cooking vat for cooking. In the vertical cooking vat, the wood chips are cooked and softened under saturated steam at a temperature of 135 ° C. The cooking time is 5 minutes;

[0037] (4) wax application heat grinding: liquid wax i...

Embodiment 3

[0044] A production method of low-aldehyde medium density fiberboard, the steps are as follows:

[0045] (1) Chipping of raw materials: Send the residues of wood processing including slats and waste veneers to the conveyor chain, and then enter the drum chipper to cut into pieces to obtain wood chips;

[0046] (2) Impurity removal and screening: Use a magnet device to remove metal objects mixed in the wood chips, screen the wood chips through a screening machine, remove debris, and separate the oversized wood chips to obtain uniform wood chips, and wash the wood chips with water washing equipment. Remove mud, sand and other impurities contained in wood chips;

[0047] (3) Cooking: Put the wood chips obtained in step (2) into a vertical cooking vat for cooking. In the vertical cooking vat, the wood chips are cooked and softened under saturated steam at a temperature of 140 ° C. The cooking time is 4 minutes;

[0048] (4) wax application heat grinding: liquid wax is applied on ...

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Abstract

The invention relates to a method for producing a low-formaldehyde medium-density fiberboard and belongs to the technical field of wood resource utilization. The method for producing the low-formaldehyde medium-density fiberboard comprises the technological steps of raw material slicing, impurity-removal and screening, boiling, waxing and hot grinding, gluing and drying, mat formation and hot pressing, and finished product obtaining. According to the method, residues, such as battens and waste veneer, generated during wood processing are used for producing the low-formaldehyde medium-density fiberboard, waste materials are recycled, and full utilization of wood resources is effectively achieved; the formaldehyde residual volume of low-formaldehyde urea formaldehyde resin adhesive used for producing the medium-density fiberboard is low, in this way, harm to the health of human bodies is reduced, and the bonding force is high; in addition, the fiberboard has good damp-proof performance and good water-proof performance, the internal structure of the board is uniform, the density is proper, the dimensional stability is high, the quality is stable, and the service life is long.

Description

technical field [0001] The invention relates to a method for making a low-aldehyde medium-density fiberboard, which belongs to the technical field of wood resource utilization. Background technique [0002] Density board, also known as fiberboard, is a man-made board made of wood fiber or other plant fiber and applied with urea-formaldehyde resin or other suitable adhesives. According to its density, it can be divided into high-density board, medium-density board and low-density board. [0003] MDF is soft, impact-resistant, and easy to reprocess. It is a good material for making furniture abroad. However, because the national standard for high-density boards is several times lower than the international standard, the use quality of MDF in my country There is still room for improvement. Medium density fiberboard is a kind of density board. It is made of wood fiber or other plant fiber, after crushing, fiber separation, drying, adding aldehyde resin or other suitable adhesiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N1/02B27N3/14B27N3/12B27N3/18
Inventor 邓军
Owner 霸州市郭仕智能家居科技有限公司
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