Q:What is the difference between laminated lumber (LVL) and plywood (plywood)?

LVL is also called "forward" plywood. Generally, the wood fibers of each floor are in the opposite direction. In this case, the consequent forces are relatively large. For structural problems, there are a few layers that will be horizontal, such as the two floor.

Q:Building engineering wood plywood can turn over several times?

Turnover four or five times, no more problems, pay attention to brushing, release oil protection, sporadic damaged replacement.

Q:How much is it per square metre to be decorated with plywood?

The principle of symmetry principle: single center plane plate on both sides of the water, both species veneer thickness, layer, manufacturing method, fiber direction and single board rate should correspond with each other, which is symmetrical on both sides of the center plane of each layer corresponding to the principle of plywood in different direction stress phase etc.. Therefore, when the change of veneer moisture content, its stable structure, no deformation, cracking and other defects; on the contrary, if the symmetry center plane of corresponding layer there are some differences, will make the center plane on both sides of single board stress is not equal, the deformation and cracking of plywood. Principle of odd number layer: because the structure of plywood is adjacent layer, the fiber direction of single board is perpendicular to each other, and must accord with symmetry principle, so its total number of layers must be odd number. Such as: three laminates, five laminates, seven laminates and so on. When the odd ply plywood is bent, the maximum horizontal shear stress acts on the central veneer to make it have greater strength. Even when the plywood is bent, the maximum horizontal shear stress acts on the adhesive layer, not on the veneer. It can destroy the adhesive layer and reduce the strength of plywood.

Q:Please master, simple and easy to tell me what is: plywood, composite board, the kind of wood powder pressed into what the board? What are their characteristics, please?

The composite board is bonded with several boards, including plywood + MDF, plywood + decorative panel, MDF + melamine board, MDF + MDF and so on

Q:What material is good for siding?

Wood grain artificial board: it is a kind of new decorative material on the surface of particleboard, fiberboard, plywood and so on. It is made of sand, light, greasy, oil, printed wood and so on. Its surface has precious wood texture and color, rich in layers, fresh, and wear-resistant, temperature, pollution, weather resistance, and waterproof, adhesion and other characteristics.

Q:What are the common quality defects of plywood?

The reason of the core plate lamination and off seam is that the reserved gap is too large or too small when using the zero slice core, the dislocation or overlap of the core plate when the plate is loaded, and the edge of the blank is not uniform.

Q:Desulfurization absorption tower anticorrosive lining glue, specifications have stipulated, rubber board need sampling?

There shall be no leakage glue brushing brush, and each layer of mortar and its adjacent layers in the brush should be arranged in a crisscross pattern, and manufacturers should consider each layer of glue between color should have greater contrast, so it is easy to check out the leak brush. The year of the mucilage must be moderate, the viscosity of the mucilage is too large, and the appearance of the drying of the film is easy to appear. The surface of the adhesive film has dried and the inner solvent has not been volatilized, and the rubber plate will blister when it is vulcanized. In brushing the next mortar, we must ensure that the last glue has basically dried. In addition, the need to pay attention to the coefficient of thermal conductivity of rubber plate and steel shell is not the same, but the need to ensure that both the dry mortar and reach the rubber lining, so the glue coating time sheet in advance, and the steel shell glue coating should be slightly lag.

Q:What is the production process of bamboo plywood?

The four roller coating machine soluble phenolic resin on bamboo roller coating glue water, the quantity is 300, 350g/ square meters (double). Adhesive can be added 1%--3% flour, soy flour and other fillers. The filling agent causes the bamboo sheet to form a gum film on the surface after gluing, which is difficult to produce flowing glue when hot pressing, and the brittleness of the adhesive layer can be improved after curing.

Q:What is copper paper or rubber paper?

Coated paper is an advanced printing paper made of base paper coated with white paint. Mainly used for printing books cover and illustrations, senior color pictures, a variety of exquisite product advertising, packaging, trademarks, sample. Coated paper is also called coated printing paper. It is called "powder paper" in areas such as Hongkong. It is an advanced printing paper made of base paper coated with white paint. Mainly used for printing books cover and illustrations, senior color pictures, a variety of exquisite product advertising, packaging, trademarks, sample.

Q:The difference between laminates and plywood

A laminate made of two or more layers of resin impregnated fabric or fabric that is laminated and pressed together. Laminates are one of the laminates.