The results of three formaldehyde free wood-based panels have passed the new product appraisal in Beijing, China
Recently, the achievements of three aldehyde free boards using isocyanate adhesive, named “key technology of isocyanate (PMDI) formaldehyde free wood / bamboo plywood manufacturing”, “isocyanate plywood” and “isocyanate bamboo laminated timber”, have passed the new product appraisal in Beijing.
The expert group organized by China Forestry Society and China Forestry Products Industry Association concluded that in view of the environmental protection of indoor furniture and decoration materials and the market demand for formaldehyde free plywood products, “key technology for manufacturing PMDI formaldehyde free wood / bamboo plywood” takes wood veneer or bamboo strip as the main raw material, through the physical sealing treatment technology of wood / bamboo veneer surface, isocyanate spray sizing technology The integrated innovation of isocyanate multi compound anti-seepage technology and sizing process has developed isocyanate aldehyde free wood / bamboo plywood, realized the aldehyde free bonding of wood or bamboo veneer materials, solved the problem of environmental pollution caused by free formaldehyde and free phenol of existing phenolic resin and urea formaldehyde resin, and prepared isocyanate bamboo laminated timber and isocyanate plywood.
Tested by the National Center for quality supervision and inspection of wood-based panels and wood and bamboo products, the static bending strength of isocyanate bamboo laminated timber is 88.6 MPa and the average elastic modulus is 17.8 × 103 MPa, min 16.7 × 103 MPa, 3 authorized invention patents; Isocyanate plywood has a static bending strength of 32.8 MPa, an elastic modulus of 5170 MPa, and a total volatile organic compound TVOC content of 87 micrograms per cubic meter. The product meets the enf grade specified in GB / t39600-2021 standard; 3 authorized invention patents; Both products have been mass produced and applied, and the user feedback is good.
The evaluation expert committee agreed that the achievements of “key technologies for manufacturing isocyanate (PMDI) aldehyde free wood / bamboo plywood” have reached the international advanced level, in which the veneer surface sealing technology and isocyanate micro nano biological powder compounding technology have reached the international leading level; “Isocyanate plywood” and “isocyanate bamboo laminated timber” products have reached the international leading level.
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