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Fire retardant cemented veneer and its production process

A veneer, flame-retardant technology, applied in the field of glued veneer, can solve the problems of easy-to-corrode wood base material, unsuitable flame retardant treatment of decorative veneer, etc., to prevent the spread and spread of flames, and improve the service life.

Inactive Publication Date: 2006-11-08
ZHEJIANG SHENGHUA YUNFENG GREENEO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the fire-resistant adhesive contains phosphoric acid, it is easy to corrode the wooden substrate in a humid environment, so it is not suitable for flame-retardant treatment of decorative veneers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mixing urea-formaldehyde resin, polyvinyl acetate emulsion, flour, and titanium dioxide in a weight ratio of 3.8:1.6:1.0:0.06 to form a bonding base;

[0031] Mix and grind urea-formaldehyde resin, ammonium polyphosphate, dipentaerythritol, and melamine in a ratio of 38:35:12:15 (weight ratio) to form a flame retardant;

[0032] Stir the adhesive base material and flame retardant at a ratio of 1:1.5 to form a viscous fireproof adhesive.

[0033] Then apply the fireproof adhesive evenly on the plywood substrate after drying, sanding, smoothing and cleaning, and the sizing amount is 600g / m 2 , and then covered with a natural veneer veneer layer, hot-pressed at 105° C. and 0.8 MPa for 10 minutes to obtain a fireproof veneer plywood.

[0034] The GB 15442.4 standard was used for testing, and the results are as follows:

[0035] Mass loss 2.1g, carbonization volume 1.0cm 3 , corresponding to the first-class fire protection standard.

Embodiment 2

[0037] Mix urea-formaldehyde resin, polyvinyl acetate emulsion, flour, and titanium dioxide in a ratio of 3.8:1.6:1.0:0.06 to form a bonding base; mix urea-formaldehyde resin, ammonium polyphosphate, dipentaerythritol, and polyamide in a ratio of 40:38:10: 12 (weight ratio) mixing and grinding to form a flame retardant; stirring and blending the bonding base material and the flame retardant at a ratio of 1:1.5 to form a viscous fireproof adhesive. Then apply the fireproof adhesive evenly on the plywood substrate after drying, sanding, smoothing and cleaning, and the sizing amount is 500g / m 2 , and then covered with a natural veneer veneer layer, hot-pressed at 105° C. and 0.8 MPa for 10 minutes to obtain a fireproof veneer plywood.

[0038] The GB 15442.4 standard was used for testing, and the results are as follows:

[0039] Mass loss 3.6g, carbonization volume 1.8cm 3 , corresponding to the first-class standard of fire protection

Embodiment 3

[0041] Mix urea-formaldehyde resin, polyvinyl acetate emulsion, flour, and titanium dioxide in a ratio of 3.8:1.6:1.0:0.06 to form a bonding base; mix urea-formaldehyde resin, ammonium polyphosphate, dipentaerythritol, and melamine in a ratio of 38:35:12:15 (weight ratio) mixing and grinding to form a flame retardant; stirring and blending the bonding base material and the flame retardant at a ratio of 1:1.5 to form a viscous fireproof adhesive. Then apply the fireproof adhesive evenly on the plywood substrate after drying, sanding, smoothing and cleaning, and the sizing amount is 600g / m 2 , and then covered with a natural veneer veneer, hot-pressed at 110°C and 1.5MPa for 5 minutes to obtain a fireproof veneer plywood.

[0042] The GB 15442.4 standard was used for testing, and the results are as follows:

[0043] Mass loss 2.2g, carbonization volume 1.0cm 3 , corresponding to the first-class fire protection standard.

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Abstract

The present invention discloses a kind of fire retardant veneer and its production process. The fire retardant veneer contains no phosphoric acid and has less corrosion of wooden base material in damp environment and long service life. At the same time, in case of fire, the acid source, the carbon source and the gas source inside the fire retardant system form compact carbon layer in the veneer surface to block heat source transfer and isolate oxygen so as to avoid the frame propagation effectively. The fire retardant veneer in fire produces no toxic and corrosive gas and is environment friendly.

Description

technical field [0001] The invention relates to a glued veneer, in particular to an adhesive for a flame-retardant glued veneer. Background technique [0002] Wood-based panels are boards made of wood raw materials or other plant fibers and adhesives, which are processed through certain production processes. [0003] The wood-based panel industry is an important part of forestry to efficiently utilize wood and save wood resources. In the current situation where the available forest resources in the world are seriously insufficient and the resource structure is unbalanced, accelerating the development of the wood-based panel industry and replacing large-diameter wood products with wood-based panel products will play an inestimable role in realizing the sustainable development strategy. [0004] As one of the wood-based panels, decorative veneer veneer plywood, referred to as veneer plywood, is a board made of natural wood decorative veneer processed into artificial veneer an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B32B21/13
Inventor 杨云霞袁双龙陈国荣顾水祥
Owner ZHEJIANG SHENGHUA YUNFENG GREENEO
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