A kind of formaldehyde-free, flame-retardant, water-resistant glued wood laminate and production method thereof

Abstract

The invention provides a formaldehyde-free flame-retardant and waterproof glued wood laminated board and a production method thereof. No free formaldehyde is released. Poplar boards are used as the uppermost layer and the lowermost layer of the laminated board. The middle layer of the laminated board is formed by overlapping a plurality of eucalyptus boards up and down. The wood grains of every two adjacent eucalyptus boards up and down in the middle layer are arranged vertically and horizontally. The wood grains of the eucalyptus board at the bottom of the middle layer and the wood grains of the poplar board of the lowermost layer are arranged vertically and horizontally. The wood grains of the eucalyptus board at the top of the middle layer and the wood grains of the poplar board of the uppermost layer are arranged vertically and horizontally. The upper board face and the lower board face of each eucalyptus board are provided with glue grooves arranged in the direction of the grains. The production method of the laminated board comprises the following steps that small eucalyptus boards are placed on a rolling mill along the grains for rolling pressing treatment so that the glue grooves can be formed; the small eucalyptus boards are spliced into the eucalyptus boards of the two types of longitudinal rift grains and transverse rift grains; polyvinyl alcohol glue is prepared; hot-melt resin mortar is prepared; the board faces are glued; aging is conducted; assembling is conducted; hot pressing is conducted; board sawing is conducted; and edge banding is conducted.

Description

technical field [0001] The invention relates to a formaldehyde-free, flame-retardant, water-resistant glued wooden laminated board and a production method thereof. Background technique [0002] Woodworking plywood is widely used in the construction industry, especially in house decoration and furniture manufacturing. Traditional woodworking plywood basically uses urea-formaldehyde resin, phenolic resin and melamine-formaldehyde resin as adhesives, which are hot-pressed into boards. "Trialdehyde" resin has been used for hundreds of years. They have mature technology, low cost, and can meet the requirements of bonding strength, so they have been used for hundreds of years. However, one of their fatal weaknesses is that they are synthesized with formaldehyde. When formaldehyde is synthesized with urea, phenol, and melamine, it is impossible to synthesize all formaldehyde into polymers with the best technology. Some formaldehyde does not participate in the reaction. It is custo...

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Problems solved by technology

[0005] The Chinese patent application number 201320541466.3 discloses a bamboo-based poplar-eucalyptus composite substrate and a bamboo-based poplar-eucalyptus composite bridge board. Although poplar and eucalyptus are used as raw materials, phenolic resin is still used as glue. As mentioned above, there is a hazard of releasing formaldehyde

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