Production method of vermiculite flame retardant medium density fiberboard

A production method and fiberboard technology, applied in the field of wood-based panel manufacturing, can solve problems affecting the physical and mechanical properties of slabs, achieve the effects of delaying fire time, saving costs, and solving environmental problems

Inactive Publication Date: 2011-11-30
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent No. ZL200720042049.9 once disclosed a practical technology of "cotton stalk flame-retardant medium density fiberboard". The main raw materials of the composite board are three-layer structure made of foamed vermiculite, adhesive, and cotton stalk fiber according to a certain formula. Flame-retardant medium-density fiberboard (surface foamed vermiculite, core layer of cotton stalk fiber), the flame-retardant medium-density fiberboard made according to this formula, its main disadvantage is that the foamed vermiculite is not glued but directly paved, vermiculite The addition of stone will affect the physical and mechanical properties of the slab

Method used

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  • Production method of vermiculite flame retardant medium density fiberboard
  • Production method of vermiculite flame retardant medium density fiberboard

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Experimental program
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Effect test

Embodiment 1

[0018] 1. Select raw materials, vermiculite, wood fiber, and urea-formaldehyde resin as adhesives, among which the vermiculite is crushed and sieved through 60 mesh, the moisture content of wood fiber is less than 8%, and the preset density of the slab is 0.75g / cm 3 ;

[0019] Second, the surface layer, the bottom layer,

[0020] 1) The amount of vermiculite added is 30% of the dry fiber weight; the sizing amount of urea-formaldehyde resin to vermiculite is 6% of the dry fiber weight, and the curing agent NH is added to the urea-formaldehyde resin 4 Cl, curing agent NH 4 Cl amount is 1% of urea-formaldehyde resin weight;

[0021] 2) Combine urea-formaldehyde resin with curing agent NH 4 Cl mixed and stirred, mixed and stirred evenly, mixed with vermiculite and stirred evenly;

[0022] 3) Mix urea-formaldehyde resin, curing agent NH 4 The mixed material of Cl and vermiculite is divided into two parts, which are respectively used as surface layer and bottom layer material; ...

Embodiment 2

[0028] 1. Select raw materials, vermiculite, wood fiber, and urea-formaldehyde resin as adhesives, among which the vermiculite is crushed and sieved through 60 mesh, the moisture content of wood fiber is less than 8%, and the preset density of the slab is 0.85g / cm 3

[0029] Second, the surface layer, the bottom layer,

[0030] 1) The amount of vermiculite added is 70% of the dry fiber weight; the sizing amount of urea-formaldehyde resin to vermiculite is 9% of the dry fiber weight, and the curing agent NH is added to the urea-formaldehyde resin 4 Cl, curing agent NH 4 Cl amount is 1% of urea-formaldehyde resin weight;

[0031] 2) Combine urea-formaldehyde resin with curing agent NH 4 Cl mixed and stirred, mixed and stirred evenly, mixed with vermiculite and stirred evenly;

[0032] 3) Mix urea-formaldehyde resin, curing agent NH 4 The mixed material of Cl and vermiculite is divided into two parts, which are respectively used as surface layer and bottom layer material;

...

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Abstract

The present invention is a production method of vermiculite flame retardant medium density fiberboard, which includes selection of raw materials, preparation of surface layer, bottom layer and core layer, paving, pre-pressing, hot pressing, cooling, stacking, edge cutting, physical mechanics and combustion performance tests, etc. process steps. Advantages: due to the separate sizing of the surface layer, bottom layer and core layer materials, the amount of vermiculite added is based on the percentage of absolute dry fiber weight, the mechanical properties of the medium density fiberboard made by the present invention are better than the existing flame retardant and wood fiber Mechanical properties of medium density fiberboard made with mixed sizing. The results of the combustion performance test show that due to the addition of vermiculite accounting for 30-70% of the dry fiber weight in wood fibers, the heat release rate, total heat release, total smoke release, smoke yield and Mass loss rate, delayed ignition time. Tests have proved that with the increase of the amount of vermiculite added, the flame retardant performance of the product will increase. This product solves the problems of flammability and environmental protection, has low cost, and has both practical significance and promotion value.

Description

technical field [0001] The invention relates to a production method of a vermiculite flame-retardant medium-density fiberboard using inorganic vermiculite as a flame retardant, and belongs to the technical field of wood-based panel production. Background technique [0002] Medium-density fiberboard is a high-grade wood-based panel, which is widely used in furniture manufacturing, interior decoration, vehicle and ship manufacturing, and audio and musical instrument manufacturing. At present, the most commonly used inorganic flame retardants for flame-retardant wood-based panels are compounds containing P, N, B, Al and halogens, etc., which can be roughly divided into phosphorus-nitrogen series based on ammonium phosphate, and boron series mainly based on borides. , Halogen-containing halogen compounds and metal oxides or hydroxides containing Mg, Al, etc. The flame retardant treatment of medium density fiberboard is generally divided into two types: finished board treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/06
Inventor 黄润州石晶李慧媛卫佩行周定国
Owner NANJING FORESTRY UNIV
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