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Method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin

A technology of compounding urea-formaldehyde resin and plywood, which is applied in the joining of wooden veneers, other plywood/plywood appliances, chemical instruments and methods, etc., can solve the problem of low corrosion resistance, perishability and insect resistance of all eucalyptus plywood To achieve the effect of reducing free formaldehyde content, white color, and good film formation

Active Publication Date: 2017-01-11
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

[0005] At present, there is no literature report on the production of eucalyptus plywood with anticorrosive compound urea-formaldehyde resin as glue
The whole eucalyptus plywood is a wooden material, which is easily attacked by bacteria, insects, marine borers and other organisms, and is easy to rot. subject to some restrictions

Method used

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  • Method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0065] (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;

[0066] (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%;

[0067] (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 anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 200g / m 2 ;

[0068] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.8 MPa and at room temperature, each...

Embodiment 2

[0089] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0090] (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;

[0091] (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%;

[0092] (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 anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 220g / m 2 ;

[0093] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.85 MPa and at room temperature,...

Embodiment 3

[0114] Adopt anticorrosion composite urea-formaldehyde resin to produce the method for full eucalyptus plywood, comprise the steps:

[0115] (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;

[0116] (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%;

[0117] (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 anti-corrosion compound urea-formaldehyde resin, and the amount of glue on one side is 230g / m 2 ;

[0118] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.9 MPa and at room temperature, ea...

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Abstract

The invention discloses a method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin. The method comprises the following steps: rotatably cutting wood boards; drying each board; gluing; performing cold pressing for three times; stewing and conditioning; performing hot pressing for three times; cooling and conditioning; determining the thickness of a board blank and sanding the board blank. 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, hydrogenated rosin is taken as an antioxidant, polyisocyanate is taken as a curing agent, isobutyl triethoxy silane is taken as a bridging agent, phenolated lignin is taken as a formaldehyde catcher and a preservative is also added to prepare the anticorrosive composite urea resin. The total-eucalyptus plywood produced by adopting the anticorrosive composite urea resin has the advantages of low formaldehyde residual volume and good corrosion resistance, is relatively good in resistance to wood-destroying fungi, mould and white ants, and is prolonged in service life.

Description

technical field [0001] The invention belongs to the field of wood-based panel manufacturing, in particular to a method for producing whole eucalyptus plywood by adopting an anti-corrosion compound 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, and the lam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B27D5/00B32B37/06B32B37/10C09J161/32C09J103/10C09J11/08C09J11/06C09J11/04
CPCB27D1/04B27D1/08B27D5/00B32B37/06B32B37/10C08L2205/035C09J11/04C09J11/06C09J11/08C09J161/32C08L3/10C08L29/04C08L93/04C08L97/005C08K13/02C08K3/04C08K2003/387C08K5/098
Inventor 陈姗姗
Owner 广西横县正林木业有限公司
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