What kind of wooden door will not be deformed?
Wood is a natural growth material. Due to the difference in the internal structure of the annual rings, it is impossible to make absolutely no deformation. There are usually two ways to reduce the deformation of the wood: one is to use the advanced drying degreasing equipment to dry and degrease the wood, so that when the wet wood becomes a dry usable material, the internal stress is less in the wood; One is long material short-term finger joint (ie, longitudinal integration, unloading internal stress to reduce deformation), and wide material is glued with narrow material (ie, lateral integration, using annual rings to shorten the root material to reduce deformation). This is the reason why vertical and horizontal (two-dimensional) laminated materials largely replace large-size solid wood materials in daily life.
- Wood is a "sponge body" and "wet up and down" is another attribute. The asymmetry of the wood structure determines that the wet and shrinkage rates of the wood are different. A large number of scientific experiments have shown that the vast majority of wood, the chordwise (circumferential direction) wet ups and downs are doubled in the radial direction (diameter direction), is the longitudinal (tree growth direction) twenty times relationship, and the tensile strength On the contrary, the longitudinal tensile strength of wood is twenty times the relationship between the string and the radial direction. This is the reason why the cross-stacked and viscous wood boards such as plywood have been reduced by a dozen times due to the lateral wet-up and shrinkage rate, and the tensile strength has increased by a factor of ten to replace the solid wood board.
—— Obviously, vertical and horizontal (two-dimensional) laminated materials can solve the deformation problem by replacing large-scale materials, but it still cannot solve the problem of excessive lateral expansion and shrinkage. If the two-layer transverse veneer is glued on the basis of the vertical and horizontal (two-dimensional) glulam (see Figure 1), the deformation problem is solved, and the lateral wet-up and shrinkage problem is solved, because the lateral tensile strength is improved. More than ten times, it also solves the problem of lateral cracking and reduces lateral deformability. We call such a laminated material a vertical and horizontal three-dimensional laminated material.
—— Among the indoor wooden decorative materials, the materials expressed in solid wood form have always been the most luxurious and vital. Card shield solid wood composite products, such as door covers, window covers, wooden doors, etc., are based on vertical and horizontal three-dimensional laminated materials (or two-dimensional vertical and horizontal laminated materials), using the bending pressure (flat pressure) hot pressing process, bonding It is made of precious veneer. On the one hand, it has the characteristics of solid wood and is luxurious and productive. On the other hand, it is less deformed than solid wood products, characterized by low cracking and wet shrinkage, low price and low price. The basic characteristics of the card shield solid wood composite series products.
—— Card Shield solid wood composite series products are creatively using vertical and horizontal 3D laminated materials (or 2D vertical and horizontal laminated materials) as the substrate. What is the effect of using them? In the past seven years, large batches of repeat customers are a good proof.
——We want to affirm that the vertical and horizontal three-dimensional laminated materials can greatly reduce the deformation, cracking and wet ups and downs of the wood, but it is impossible to completely solve the problems of deformation, cracking and wet ups and downs; we are not deformed. It means that the degree of deformation does not exceed the allowable range of national or corporate standards; we do not crack, referring to the absence of structural cracking, rather than cracking and cracking of the epidermis.
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