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Method of producing full-eucalyptus wood plywood by adopting high-temperature resistance composite urea-formaldehyde resin

A composite urea-formaldehyde resin, high temperature resistant technology, used in the joining of wooden veneers, non-polymer adhesive additives, aldehyde/ketone condensation polymer adhesives, etc., can solve problems such as cracking and achieve heat resistance. Good, good heat resistance, low formaldehyde content

Inactive Publication Date: 2016-12-21
南宁市创锦胶合板有限责任公司
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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 whole eucalyptus plywood by using high-temperature-resistant composite urea-formaldehyde resin, so as to solve the problem of deformation of whole eucalyptus plywood in case of high temperature, high-strength ultraviolet radiation or long-term ultraviolet radiation. The problem

Method used

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  • Method of producing full-eucalyptus wood plywood by adopting high-temperature resistance composite urea-formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The method for producing full eucalyptus plywood by adopting high-temperature-resistant composite urea-formaldehyde resin comprises the following 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 a high temperature resistant composite 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 pressu...

Embodiment 2

[0089] The method for producing full eucalyptus plywood by adopting high-temperature-resistant composite urea-formaldehyde resin comprises the following 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 a high temperature resistant composite 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 pr...

Embodiment 3

[0114] The method for producing full eucalyptus plywood by adopting high-temperature-resistant composite urea-formaldehyde resin comprises the following 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 a high temperature resistant composite 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 pres...

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Abstract

The invention discloses a method of producing full-eucalyptus wood plywood by adopting high-temperature resistance composite urea-formaldehyde resin. The method comprises the following steps: rotary cutting a wood board into a sheet; drying a veneer; gumming; cold pressing for three times; standing, and curing; hot pressing for three times; carrying out heat dissipation and curing; and defining the thickness of a board blank and sanding. The production method has the key points that melamine modified urea-formaldehyde resin is adopted as a major ingredient of an adhesive, and oxidized starch is added as a viscous complex additive; polyvinyl alcohol is taken as a toughening agent; hydrogenated rosin is taken as an antioxidant; polyisocyanate is taken as a curing agent; isobutyltriethoxysilane is taken as a bridging agent; and phenolized lignin is taken as a formaldehyde scavenger, and then a high-temperature resistance filler is added to prepare the high-temperature resistance composite urea-formaldehyde resin. By using the high-temperature resistance composite urea-formaldehyde resin prepared by the method to be used for producing the full-eucalyptus wood plywood, the full-eucalyptus wood plywood is excellent in heat resistance and does not have obvious cracking phenomenon under high temperature, high-strength ultraviolet irradiation or long-time ultraviolet irradiation, thus the economic loss is reduced.

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 using high-temperature-resistant 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B27M3/04C09J161/24C09J103/10C09J129/04C09J171/02C09J11/04C09J11/06
CPCB27D1/04B27D1/08B27M3/04C08L2205/035C09J11/04C09J11/06C09J161/24C08L3/10C08L29/04C08L71/02C08K13/02C08K2003/222C08K5/17C08K5/5425C08K5/29
Inventor 王飞虎唐贤明胡海强
Owner 南宁市创锦胶合板有限责任公司
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