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Method for producing particle board through anti-insect and anti-mold composite urea formaldehyde resin

The technology of urea-formaldehyde resin and urea-formaldehyde resin glue is applied in the field of particleboard production by using the compound urea-formaldehyde resin for insect and mildew prevention, which can solve the problems that the urea-formaldehyde resin adhesive has no insect-proof and mildew-proof effect, and the adhesive has no insect-proof and mildew-proof effect. Reduce free formaldehyde content, white color, good freeze-thaw resistance

Active Publication Date: 2017-02-01
广西横县新威林板业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The adhesive prepared by the above-mentioned patent has no insect-proof and mildew-proof effect, and its urea-formaldehyde resin glue only adds the latex modified by the silane coupling agent to the late reaction of the synthesis of urea-formaldehyde resin to achieve the purpose of introducing Si-O bonds, so that The final synthesized urea-formaldehyde resin adhesive can form Si-O-Si bonds in the process of drying and forming a film, which improves the surface sizing and increases the mechanical strength of the latex film, but it does not improve the urea-formaldehyde resin adhesive. Anti-insect and anti-mildew effect

Method used

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  • Method for producing particle board through anti-insect and anti-mold composite urea formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The method for producing particleboard by adopting an insect-proof and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0062] 1) After simple screening, the waste materials that cannot be used in the process of making multi-layer eucalyptus boards after rotary cutting eucalyptus boards are sent to the planer by the conveyor for shavings, and then sent by the conveyor to the wet shavings silo for transitional storage; The moisture content of wood shavings should be kept below 20% by weight;

[0063] 2) The wet shavings are sent to the drum dryer by the conveyor for drying, so that the moisture content of the shavings is below 10% by weight;

[0064] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0065] 4) After the dried shavings are screened and sorted, the dry shavings of the surface core layer with a length of less than 2 cm are sent to the dry shaving material transition warehouse of the surface core...

Embodiment 2

[0084] The method for producing particleboard by adopting an insect-proof and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0085] 1) After simple screening, the waste materials that cannot be used in the process of making multi-layer eucalyptus boards after rotary cutting eucalyptus boards are sent to the planer by the conveyor for shavings, and then sent by the conveyor to the wet shavings silo for transitional storage; The moisture content of wood shavings should be kept below 20% by weight;

[0086] 2) The wet shavings are sent to the drum dryer by the conveyor for drying, so that the moisture content of the shavings is below 10% by weight;

[0087] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0088] 4) After the dried shavings are screened and sorted, the dry shavings of the surface core layer with a length of less than 2 cm are sent to the dry shaving material transition warehouse of the surface core...

Embodiment 3

[0107] The method for producing particleboard by adopting an insect-proof and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0108] 1) After simple screening, the waste materials that cannot be used in the process of making multi-layer eucalyptus boards after rotary cutting eucalyptus boards are sent to the planer by the conveyor for shavings, and then sent by the conveyor to the wet shavings silo for transitional storage; The moisture content of wood shavings should be kept below 20% by weight;

[0109] 2) The wet shavings are sent to the drum dryer by the conveyor for drying, so that the moisture content of the shavings is below 10% by weight;

[0110] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0111] 4) After the dried shavings are screened and sorted, the dry shavings of the surface core layer with a length of less than 2 cm are sent to the dry shaving material transition warehouse of the surface core...

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Abstract

The invention discloses a method for producing a particle board through anti-insect and anti-mold composite urea formaldehyde resin. The method comprises the procedures like material preparation, drying, veneer removing and grit removing, mixing glue, and hot press molding. The key of the production method is that melamine modified urea formaldehyde resin is adopted as a main material of an adhesive; oxidized starch is added as a viscous complexing agent; polyvinyl alcohol is adopted as a flexibilizer; hydrogenated rosin is adopted as an antioxidant; polyisocyanate is adopted as a curing agent; and triethoxyisobutylsilane is adopted as a bridging agent. According to the method, the anti-insect and anti-mold composite urea formaldehyde resin is prepared through adopting phenolated lignin as a formaldehyde capture agent and adding an anti-insect and anti-mold agent, and the particle board produced through the anti-insect and anti-mold composite urea formaldehyde resin has the advantages that the residual amount of formaldehyde is low and the anti-insect and anti-mold effect is good, has a quite high inhibiting effect on breeding of aspergillus, trichoderma and penicillia, and has instantaneous killing force and a long-term prevention effect on board powder-post beetles.

Description

technical field [0001] The invention belongs to the field of artificial board manufacturing, in particular to a method for producing particle boards by using an insect-proof and mildew-proof composite urea-formaldehyde resin. Background technique [0002] Particleboard is an important board type in wood-based panels. Compared with other board types, its production investment is relatively small, energy consumption is small, cost is low, and the requirements for raw material quality are not high. Three leftovers, fast-growing materials, recycling waste Both wood and some non-wood materials can be used as raw materials for particle boards, so China has unique advantages in developing the particle board industry in China where wood resources are scarce. The interior of the particleboard is granular with a cross-staggered structure, the performance of each part is basically the same, and the lateral load-bearing capacity is good; the surface of the particleboard is smooth, the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N1/02B27N3/14B27L11/02C09J161/30C09J103/10C09J11/08C09J11/06C09J11/04C09J11/00
CPCB27L11/02B27N1/0209B27N3/02B27N3/14C08K2201/014C08L2205/035C09J11/00C09J11/04C09J11/06C09J11/08C09J161/30C08L3/10C08L29/04C08L93/04C08K13/02C08K3/04C08K5/5419
Inventor 陈正照
Owner 广西横县新威林板业有限公司
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