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Method for producing eucalyptus wood plywood by adopting insect-proof and mildew-proof composite urea formaldehyde resin

A urea-formaldehyde resin and plywood technology, which is used in the joining of wooden veneers, the manufacture of veneers, and aldehyde/ketone condensation polymer adhesives, etc. Serious problems, to achieve the effect of improving aging resistance, reducing the amount of added, and white color

Active Publication Date: 2016-12-07
广西横县正林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned technical defects, the purpose of the present invention is to provide a method for producing eucalyptus plywood using insect-proof and mildew-proof composite urea-formaldehyde resin, so as to solve the current situation that eucalyptus plywood is deformed due to air humidity, and even has mildew and rot. , resulting in severe musty smell in the room, and after long-term moisture absorption, the board will be warped and deformed due to the difference in expansion force

Method used

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  • Method for producing eucalyptus wood plywood by adopting insect-proof and mildew-proof composite urea formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The method for producing full eucalyptus plywood by adopting the anti-insect and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0068] (1) Rotary slices of wood: Use a rotary cutter to cut eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out unqualified boards with insect eyes, decay, and excessive defects;

[0069] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0070] (3) Gluing: Glue the eucalyptus veneer with a gluing machine, arrange 9 layers of glued eucalyptus veneer criss-cross and layered according to the wood texture structure, and glue them together to obtain a eucalyptus slab; The glue is insect-proof and mildew-proof compound urea-formaldehyde resin, and the amount of glue on one side is 200g / m 2 ;

[0071] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit ...

Embodiment 2

[0092] The method for producing full eucalyptus plywood by adopting the anti-insect and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0093] (1) Rotary slices of wood: Use a rotary cutter to cut eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out unqualified boards with insect eyes, decay, and excessive defects;

[0094] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0095] (3) Gluing: Glue the eucalyptus veneers with a gluing machine, and arrange 11 layers of glued eucalyptus veneers in criss-cross layers according to the wood texture structure, and glue them together to obtain eucalyptus slabs; The glue is insect-proof and mildew-proof compound urea-formaldehyde resin, and the amount of glue on one side is 220g / m 2 ;

[0096] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a u...

Embodiment 3

[0117] The method for producing full eucalyptus plywood by adopting the anti-insect and mildew-proof composite urea-formaldehyde resin comprises the following steps:

[0118] (1) Rotary slices of wood: Use a rotary cutter to cut eucalyptus into 1.5 mm thick slices to obtain eucalyptus veneers, and pick out unqualified boards with insect eyes, decay, and excessive defects;

[0119] (2) Veneer drying: Dry the eucalyptus veneer with a hot air stove, and control the moisture content of the veneer to be less than or equal to 10%;

[0120] (3) Gluing: Glue the eucalyptus veneers with a gluing machine and arrange 13 layers of glued eucalyptus veneers criss-cross and layered according to the wood texture structure, and glue them together to get eucalyptus slabs; The glue is insect-proof and mildew-proof compound urea-formaldehyde resin, and the amount of glue on one side is 230g / m 2 ;

[0121] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a uni...

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Abstract

The invention discloses a method for producing eucalyptus wood plywood by adopting insect-proof and mildew-proof composite urea formaldehyde resin. The method comprises the following steps of: wood slab rotating, veneer drying, gluing, tertiary cold-pressing, standing and maintaining, tertiary hot-pressing, radiating and maintaining, and slab fixed-thickness sanding. The key point of the production method is that insect-proof and mildew-proof composite urea formaldehyde resin, which is prepared by taking melamine modified urea formaldehyde resin as an adhesive main ingredient, adding oxidized starch as a viscous complexing agent, taking polyvinyl alcohol as a flexibilizer, taking hydrogenated rosin as an antioxidant, taking polyisocyanate as a curing agent, taking triethoxyisobutylsilane as a bridging agent, taking phenolation lignin as a formaldehyde catching agent and adding an insect-proof and mildew-proof agent, is adopted. Solid wood composite floor produced by adopting the insect-proof and mildew-proof composite urea formaldehyde resin has the advantages of low formaldehyde residual amount and good insect-proof and mildew-proof effect, has relatively strong inhibiting effect on breeding of aspergillus, trichoderma and blue mould, and has instantaneous kill-down capacity and long-acting prevention effect on powder post beetles of wood slab.

Description

technical field [0001] The invention belongs to the field of artificial board manufacture, in particular to a method for producing whole eucalyptus plywood by using an insect-proof and mildew-proof composite urea-formaldehyde resin. Background technique [0002] Plywood is an important type of wood-based panel. The plywood currently on the market is a three-layer or multi-layer board-like material that is cut into veneers by wood segments or sliced ​​into thin wood by wood squares, and then glued with adhesives. It is usually made of odd-numbered veneers, and the fiber directions of adjacent veneers are glued perpendicular to each other; plywood is widely used in architectural decoration, furniture manufacturing, wooden door manufacturing, Floor manufacturing, marine and vehicle interior finishing. [0003] The production of plywood is mostly made of fast-growing eucalyptus wood sheets pressed together by adhesives. Eucalyptus wood has a dense structure and hard material, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27L5/02B27G11/00C09J161/30C09J103/10C09J11/04C09J11/06C09J11/08
CPCB27D1/04B27G11/00B27L5/02C08L2201/08C08L2205/035C09J11/04C09J11/06C09J11/08C09J161/30C08L3/10C08L29/04C08L93/04C08L71/02C08L97/005C08K13/02C08K5/5419C08K3/04
Inventor 陈姗姗
Owner 广西横县正林木业有限公司
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