Production technique for formaldehyde-free damp-proof high-density fiberboard
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A high-density fiberboard and production process technology, applied in the pretreatment of molding materials, manufacturing tools, wood processing utensils, etc., can solve the problem of formaldehyde air pollution of fiberboard, improve physical and mechanical properties and water resistance, and excellent chemical stability. , good mixing effect
Inactive Publication Date: 2017-04-26
LANZHOU KETIAN ENVIRONMENTAL PROTECTION ENERGY SAVING TECH CO LTD
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[0005] The purpose of the present invention is to solve the problem of formaldehyde air pollution o...
Method used
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Embodiment 1
[0028] A production process of 12mm formaldehyde-free moisture-proof high-density fiberboard, the steps are as follows:
[0029] 1. Peeling and chipping: The fresh logs of eucalyptus, pine, and miscellaneous wood are peeled by a peeling machine in a weight ratio of 2:1:7; the peeled wood is grown to 15-50mm and a width of 15-30mm, wood chips with a thickness of 3-6mm;
[0030] 2. Washing and cooking: The wood chips are washed with water to remove mixed sand, metal, mud and other impurities to ensure the cleanliness of the wood chips; the washed wood chips are steamed with saturated steam for 3 minutes, and the cooking temperature is about 170°C. Pressure 0.85MPa;
[0031] 3. Thermal grinding: The steamed wood chips are defibrated through a thermal mill, and molten paraffin is added to the mill at the same time, wherein the thermal grinding temperature is 170°C, the pressure is 0.82MPa, and the amount of paraffin wax applied is 0.6% of the dry weight of the fiber ;
[0032] ...
Embodiment 2
[0043] A production process of 7.7mm formaldehyde-free moisture-proof high-fiber board, the steps are as follows:
[0044] 1. Peeling and chipping: The fresh logs of eucalyptus, pine, and miscellaneous wood are peeled by a peeling machine in a weight ratio of 2:1:7; the peeled wood is grown to 15-50mm and a width of 15-30mm, wood chips with a thickness of 3-6mm;
[0045] 2. Washing and cooking: The wood chips are washed with water to remove mixed sand, metal, mud and other impurities to ensure the cleanliness of the wood chips; the washed wood chips are steamed with saturated steam for 3.5 minutes, and the cooking temperature is 170°C. Pressure 0.82MPa;
[0046] 3. Thermal grinding: The steamed wood chips are defibrated through a thermal grinding machine, and molten paraffin is added to the grinding machine at the same time, wherein the thermal grinding temperature is 170°C, the pressure is 0.80MPa, and the amount of paraffin wax applied is 0.5% of the dry weight of the fiber...
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Abstract
The invention discloses a production technique for a formaldehyde-free damp-proof high-density fiberboard. The production technique for the formaldehyde-free damp-proof high-density fiberboard comprises the steps of log debarking and slicing, washing and boiling, hot grinding, gluing, drying and molding, application of a releasing agent, hot pressing, cooling and curing, sanding and sawing, quality testing and grading, and packaging. The gluing process refers to that fibers obtained through hot grinding are mixed with waterborne polyurethane adhesives, water and catalysts through a fiber spraying pipe. The formaldehyde-free damp-proof high-density fiberboard obtained through the technique does not release formaldehyde or phenol substances, the internal bonding strength of the board is high, the dimension of the board is stable, and the damp resistance and water resistance of the board are good; compared with other boards, the formaldehyde-free board produced through aromatic waterborne polyurethane is high in cost performance, and the cost is not increased greatly; and the problem of formaldehyde pollution of indoor environments can be effectively solved, extensive application of the fiberboard in damp environment is broadened, and a novel technical solution to eliminating of formaldehyde release and broadening of using environments is provided for artificial board products.
Description
technical field [0001] The invention belongs to the technical field of wood processing, and relates to a production technology of fiberboard classified from wood-based panels, in particular to a production technology of formaldehyde-free moisture-proof high-density fiberboard. Background technique [0002] At present, wood-based panels are widely used in interior decoration and decoration materials. Most wood-based panels are produced using formaldehyde-containing three-aldehyde adhesives, that is, formaldehyde + urea, phenol, melamine or a combination thereof, and the reaction is reversible. During the long-term use of the board, it will continuously release formaldehyde and phenol toxic substances, which can last up to 15 years. Formaldehyde is a highly irritating poisonous gas, which not only pollutes the environment but also has strong irritation to human eyes, mouth, nose, throat and other organs, causing abnormal function of the lung and liver immune system. It is one ...
Claims
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