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Method for producing particleboard with moisture-proof composite urea-formaldehyde resin

A technology of urea-formaldehyde resin and urea-formaldehyde resin glue, which is applied in the field of particleboard production using moisture-proof composite urea-formaldehyde resin, which can solve the problems of poor boiling water resistance and aging resistance, and achieve improved aging resistance, good film-forming properties, and good freeze-thaw resistance. Effect

Active Publication Date: 2018-10-09
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

Melamine modified urea-formaldehyde resin is obtained by modifying urea-formaldehyde resin on the basis of urea-formaldehyde resin. Urea-formaldehyde resin has the advantages of cheap and easy-to-obtain raw materials and no strict limit on curing temperature. However, urea-formaldehyde resin has poor boiling water resistance and aging resistance. There are hydrophilic free methylol groups in the resin, which are easy to combine with water

Method used

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  • Method for producing particleboard with moisture-proof composite urea-formaldehyde resin

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Effect test

Embodiment 1

[0060] The method for producing particleboard by adopting a moisture-proof composite urea-formaldehyde resin, the preparation process comprises the following steps:

[0061] 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;

[0062] 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;

[0063] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0064] 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 sur...

Embodiment 2

[0085] The method for producing particleboard by adopting a moisture-proof composite urea-formaldehyde resin, the preparation process comprises the following steps:

[0086] 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;

[0087] 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;

[0088] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0089] 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 sur...

Embodiment 3

[0110] The method for producing particleboard by adopting a moisture-proof composite urea-formaldehyde resin, the preparation process comprises the following steps:

[0111] 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;

[0112] 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;

[0113] 3) Separate the dried shavings to separate the veneer; separate metal and sand;

[0114] 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 sur...

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Abstract

The invention discloses a method for producing particle board by adopting moisture-proof composite urea resin. The method comprises the steps of material preparation, drying, debarking, sand removing, sorting, grinding, glue blending, hot pressing molding and the like. The key points of the production method disclosed by the invention are that melamine modified urea resin is adopted as a main material of an adhesive and is added with oxidized starch to form a viscous compound, polyvinyl alcohol is taken as a toughening agent, magnesium oxide is taken as an antiaging agent, hexamine and triglycidyl isocyanurate are taken as a curing agent, isobutyl triethoxy silane is taken as a bridging agent, phenolated lignin is taken as a formaldehyde catcher and a moisture-proof agent is also added to prepare the moisture-proof composite urea resin; the composite urea resin has the advantages of being low in formaldehyde residual volume, good in water resistance and good in moisture resistance; therefore, the produced particle board is low in formaldehyde residual volume, hard to expand after absorbing water and hard to arch and deform, and a wear-resistant layer is hard to damage. The particle board produced by the method disclosed by the invention is low in formaldehyde residual volume, also stable in quality, hard to damage, good in water resistance and good in moisture resistance.

Description

technical field [0001] The invention belongs to the field of artificial board manufacture, in particular to a method for producing particle boards by using moisture-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 texture is lifelike, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08B27N3/10B27N1/02B27N3/00B32B37/06B32B37/10B32B37/12C09J161/32C09J103/10C09J11/04C09J11/06C09J11/08
CPCB27D1/08B27N1/0227B27N3/002B27N3/10B32B37/06B32B37/10B32B37/12B32B2037/1269C08L2205/035C09J11/04C09J11/06C09J11/08C09J161/32C08L3/10C08L29/04C08L71/02C08L97/005C08L91/06C08K13/02C08K2003/222C08K5/3492C08K5/34924C08K5/5425
Inventor 陈正照
Owner 广西横县新威林板业有限公司
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