Method for producing full-eucalyptus plywood with flame-retardant composite urea-formaldehyde resin

A technology of urea-formaldehyde resin and flame-retardant compounding, which is applied in the jointing of wooden veneers, chemical instruments and methods, aldehyde/ketone condensation polymer adhesives, etc., to achieve good freeze-thaw resistance, white color, and reduce free formaldehyde The effect of content

Inactive Publication Date: 2017-01-25
南宁市创锦胶合板有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Flame-retardant plywood is a product designed for public places, ...

Method used

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  • Method for producing full-eucalyptus plywood with flame-retardant composite urea-formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The method for producing full eucalyptus plywood by adopting flame-retardant 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 a flame-retardant composite 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 pressure of 0.8 MPa and at r...

Embodiment 2

[0093] The method for producing full eucalyptus plywood by adopting flame-retardant composite urea-formaldehyde resin comprises the following steps:

[0094] (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;

[0095] (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%;

[0096] (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 a flame-retardant composite urea-formaldehyde resin, and the amount of glue on one side is 220g / m 2 ;

[0097] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.85 MPa and...

Embodiment 3

[0118] The method for producing full eucalyptus plywood by adopting flame-retardant composite urea-formaldehyde resin comprises the following steps:

[0119] (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;

[0120] (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%;

[0121] (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 a flame-retardant composite urea-formaldehyde resin, and the amount of glue on one side is 230g / m 2 ;

[0122] (4) Three times of cold pressing: the eucalyptus slab is cold pressed three times at a unit pressure of 0.9 MPa and at...

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Abstract

The invention relates to a method for producing full-eucalyptus plywood with flame-retardant composite urea-formaldehyde resin, comprising the steps of wood board peeling->veneer drying -> gluing -> three times of cold pressing -> standing for curing->three times of hot pressing ->heat dissipation for curing->slab calibrating and sanding. The method is characterized in that the melamine modified urea-formaldehyde resin is used as the main ingredient in the adhesive; the oxidized starch as adhesive compound, the polyving akohol as toughening agent, the hydrogenated rosin as antioxidant, the polyisocyanate as curing agent, i-butyltriethoxanesilane as bridging agent, phenolic lignin as formaldehyde scavenger and flame retardant agent are added together to produce the flame-retardant composite urea-formaldehyde resin. The flame-retardant composite urea-formaldehyde resin has such advantages as littleformaldehyde residue, perfect flame resistance and lowering combustion temperature by internal endothermic reaction so that the full-eucalyptus parquet contains little formaldehyde residue and has good flame-retardant effectin case of fire disasters.

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 flame-retardant 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, and the laminated...

Claims

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Application Information

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IPC IPC(8): B27D1/08B32B37/06B32B37/10B32B37/12C09J161/32C09J103/10C09J11/04C09J11/06C09J11/08
CPCB27D1/08B32B37/06B32B37/10B32B37/12B32B2037/1269C08L2201/02C08L2205/035C09J11/04C09J11/06C09J11/08C09J161/32C08L3/10C08L29/04C08L93/04C08L71/02C08K13/02C08K2003/026C08K5/03C08K3/2279
Inventor 王飞虎胡海强张一甫
Owner 南宁市创锦胶合板有限责任公司
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