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a medium density fiberboard

A fiberboard, medium density technology, applied in the field of flame retardant medium density fiberboard and its preparation, can solve the problems of flame retardant performance and environmental protection performance to be improved, fiberboard is easy to absorb moisture, etc. Effect

Active Publication Date: 2017-10-03
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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  • a medium density fiberboard

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preparation example Construction

[0055] Preparation method 1 of modified MUF adhesive:

[0056] A. 100 parts of formaldehyde aqueous solution, 0.1 part and 0.3 part of amino-terminated hyperbranched polymer PAMAM whose mass concentration is 36.5wt% are 100 parts by weight, and 0.3 part of amino-terminated hyperbranched polymer PAMAM is put into the reactor, and the stirring is started; The active substance is sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide or ammonia water;

[0057] B. Add 1 part of hexachlorocyclotriphosphazene, heat up to 50°C, and when the temperature rises to 75°C by itself, add 35 parts of melamine, continue to heat up to 90°C, and react to obtain a preliminary polycondensate;

[0058] C. Add 40 parts of melamine to the above-mentioned preliminary polycondensate, and add 0.6 part of p-toluenesulfonamide to obtain the second polycondensate;

[0059] D. Add 20 parts of urea when the temperature of the second polycondensation product is lowered to 70°C, continue ...

Embodiment 1

[0071] 12 parts of the modified MUF adhesive prepared by the modified MUF adhesive preparation method 1, 0.12 parts of ammonium chloride, 1.2 parts of paraffin emulsion (concentration 40%), Mg / Al-LDHs prepared by the flame retardant formula 1 (0.01 part of silane coupling 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 ( The three-stage curve of hot pressing pressure is 4.0MPa, 2.5MPa, 1.0MPa respectively, the hot pressing time is 60s / mm, and the temperature is 180°C). After cooling, the flame-retardant medium density fiberboard can be obtained, and the measured oxygen index is 34.2%.

Embodiment 2

[0073] 14 parts of modified MUF adhesive prepared by preparation method 2 of modified MUF adhesive, 0.14 part of ammonium chloride, 1.2 parts of paraffin emulsion (concentration 40%), Mg / Al-LDHs15 prepared by flame retardant formula 2 parts (modified by 0.01 part of silane coupling agent) are evenly sprayed on the surface of poplar fiber with a spray gun and a sieve in sequence. Pressure three-stage curve, respectively 4.0MPa, 2.5MPa, 1.0MPa, hot pressing time 60s / mm, temperature 190 ℃), cooling to obtain a flame-retardant medium density fiberboard, the measured oxygen index is 34.8%.

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Abstract

The invention relates to a medium-density fiberboard. The medium-density fiberboard is prepared from, by mass, 100 parts of wood fibers, 8-15 parts of magnalium nanometer layered double hydroxide, 0.01-0.02 part of a coupling agent, 12-15 parts of a modified MUF adhesive and 1-2 parts of a waterproof agent. A preparation method comprises the steps that 1, magnalium layered double hydroxide is firstly dried and finely ground to be 20-50 micrometers, then the coupling agent with the mass percent concentration of 20%-30% is subjected to hydrolysis for 25-35 min at the room temperature, and after the coupling agent reacts for 0.5-1.5 h in an aqueous solution of 80-90 DEG C with the finely-ground magnalium layered double hydroxide added, suction filtration, washing, drying and grinding are carried out; and 2, the modified MUF adhesive and modified Mg / Al-LDHs are added to the wood fibers, 5-10 parts of a formaldehyde catching agent and 1-3 parts of a curing agent are added in the use process of the modified MUF adhesive, and the medium-density fiberboard is obtained through laying, pre-pressing forming, hot pressing and cooling. The medium-density fiberboard is environment friendly, non-toxic and free of obvious moisture absorption, and the oxygen index reaches up to 34%.

Description

technical field [0001] The invention relates to a medium-density fiberboard, in particular to a flame-retardant 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 technical purpose of the present invention is to provide a medium density fiberboard with flame-retardant properties. [0005] Technical purpose of the present invention is achieved through the following technical solutions: [0006] A medium-density fiberboard, comprising the following substances and parts by mass: 100 parts of wood fiber, 8-15 parts o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/04B27N1/02C09J161/28C08G12/32
CPCB27N1/0209B27N3/04C08G12/32C09J161/28
Inventor 姜彬徐应林黄泽民莫锦鑫钱晓晓李柠施罗斌盛时雄王平
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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