Current Position：View Information
laminated veneer
Keywords: laminated veneer
At present, the current standards for laminated veneer in China include GB/T 20241 -- 2006 and GB/T 36408 -- 2018. GB/T 20241-2006 for structural and non-structural veneer laminated materials are stipulated, for non-structural veneer laminated materials, the main indicators are the impregnation stripping performance and formaldehyde release; The structural veneer laminated materials contain the mechanical properties and durability indexes. The structural laminated veneer materials are divided into 10 grades according to the elastic modulus and 7 grades according to the horizontal shear strength. The corresponding strength and elastic modulus indexes are given according to different grades. At the same time, the standard stipulates that the water resistance, weather resistance and mechanical properties of laminated veneer for structural use should be excellent, and the adhesive should be phenolic resin adhesive or adhesives with better properties, whose adhesive properties can be evaluated by dipping and peeling test. GB/T 36408 -- 2018 divides veneer laminated materials for structural use into five grades according to their mechanical properties, and gives the strength and elastic modulus indexes according to the grades. In addition, since laminated veneer for structural use can also be used as beam and column components, the standard also specifies the tensile strength, compressive strength, shear strength and compressive strength of grain along with grain along. The impregnation peel performance of laminated veneer for structural use needs to be tested by two cycles of boiling water impregnation peel test, and the control requirements of peel rate are higher than GB/T 20241 -- 2006.
|
