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Mg/Al-LDHs (Layered Double Hydroxides) medium density fiberboard and preparation method thereof

A layered bimetallic, hydroxide technology, applied in the pretreatment of molding materials, household appliances, manufacturing tools, etc., can solve the problems of flame retardant performance and environmental protection performance to be improved, fiberboard is easy to absorb moisture, etc., and achieves low cost, Excellent flame retardant effect

Active Publication Date: 2016-07-06
DEHUA TB NEW DECORATION MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN1872514 (2006-12-06) discloses a medium-density fiberboard made of royal bamboo grass, but the fiberboard is easy to absorb moisture, and its flame-retardant performance and environmental protection performance need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 12 parts of urea-formaldehyde resin (solid content 52%, free aldehyde content 0.15%), 0.12 parts of ammonium chloride, 1.2 parts of paraffin emulsion (concentration 40%), Mg / Al-LDHs (silane dual 0.01 part of joint agent modified) 12 parts, sprayed evenly on the surface of poplar fiber with spray gun and sieve in turn, after spraying, the fiber was paved, pre-pressed (pre-pressed pressure 3MPa), hot-pressed (hot-pressed pressure Three-stage curves, respectively 4.0MPa, 2.5MPa, 1.0MPa, hot pressing time 60s / mm, temperature 180°C), cooling to obtain a flame-retardant medium density fiberboard, the measured oxygen index is 34.2%.

Embodiment 2

[0046] 14 parts of urea-formaldehyde resin (solid content 52%, free aldehyde content 0.15%), 0.14 parts of ammonium chloride, 1.2 parts of paraffin emulsion (concentration 40%), 15 parts of Mg / Al-LDHs (silane Modification of 0.01 part of coupling agent) in sequence with spray gun and sieve and other tools to evenly spray on the surface of poplar fiber. Formula curves, respectively 4.0MPa, 2.5MPa, 1.0MPa, hot-pressing time 60s / mm, temperature 190°C), cooling to obtain a flame-retardant MDF board, the measured oxygen index is 34.8%.

Embodiment 3

[0048]14 parts of urea-formaldehyde resin (solid content 50%, free aldehyde content 0.18%), 0.14 parts of ammonium chloride, 1.2 parts of paraffin emulsion (concentration 40%), 15 parts of Mg / Al-LDHs (silane Modification of 0.02 parts of coupling agent) is evenly sprayed on the surface of poplar fiber with spray gun and sieve in turn, after spraying, the fiber is paved, pre-pressed (pre-pressed pressure 4MPa), hot-pressed (hot-pressed pressure three stages Formula curves, respectively 4.0MPa, 2.5MPa, 1.0MPa, hot-pressing time 60s / mm, temperature 180 ℃), cooling to get a flame-retardant medium density fiberboard, the measured oxygen index is 34.2%.

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Abstract

The invention relates to a medium density fiberboard, in particular to a Mg / Al-LDHs (Layered Double Hydroxides) medium density fiberboard and a preparation method thereof. The Mg / Al-LDHs medium density fiberboard comprises the following substances in parts by mass: 100 parts of wood fiber, 8-15 parts of Mg / Al-LDHs, 0.01-0.02 part of a coupling agent, 12-15 parts of an adhesive, 0.15-0.2 parts of a curing agent and 1-2 parts of a waterproof agent. The preparation method comprises the following steps: (1) first drying the Mg / Al-LDHs and grinding the Mg / Al-LDHs to 20-50 mu m, then hydrolyzing the coupling agent with a mass percent concentration of 20-30% at room temperature for 25-35 min, next adding the hydrolyzed coupling agent into an 80-90 DEG C aqueous solution of the ground Mg / Al-LDHs, and after a reaction for 0.5-1.5 h, performing suction filtration, washing, drying and grinding; and (2) adding the urea-formaldehyde resin adhesive, in which the curing agent is added, and the modified Mg / Al-LDHs into the wood fiber, and performing paving, pre-pressing forming, hot pressing and cooling to obtain the Mg / Al-LDHs medium density fiberboard. The Mg / Al-LDHs medium density fiberboard provided by the invention is environment-friendly and non-toxic and has no obvious hygroscopicity, and the oxygen index of the Mg / Al-LDHs medium density fiberboard is up to 34%.

Description

technical field [0001] The invention relates to a medium-density fiberboard, in particular to a magnesium-aluminum nano-layered double metal hydroxide medium-density fiberboard and a preparation method thereof. Background technique [0002] The flammability of fiberboard will hinder the growing market demand, and the flame retardant treatment of MDF has become an increasingly urgent task. [0003] CN1872514 (2006-12-06) discloses a medium-density fiberboard of royal bamboo grass, but the fiberboard is easy to absorb moisture, and its flame-retardant performance and environmental protection performance need to be improved. Contents of the invention [0004] The first technical purpose of the present invention is to provide a magnesium-aluminum nano-layered double metal hydroxide medium density fiberboard with flame-retardant properties. [0005] The second technical purpose of the present invention is to provide a method for preparing magnesium-aluminum nano-layered double...

Claims

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Application Information

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IPC IPC(8): B27N3/04B27N3/08B27N1/00
CPCB27N1/00B27N3/04B27N3/08
Inventor 姜彬王文杰姚思远黄瑞斌范丽娜蔡云杰孙伟胜
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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