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

Plywood PLYWOOD, usually refers to the adjacent layer of wood fiber in the way of crossing, in order to tension is even.

Q:What is the difference between solid wood composite board and plywood?

) material difference: multi-layer solid wood flooring to take into account the different "anisotropy", so that the production process can fully balance the "internal stress", in addition, we need to consider for the thermal conductivity of ground bearing capacity for geothermal; and general plywood or plywood over this.

Q:What's the difference between plywood and plywood?

Plywood is one of the commonly used furniture materials. It is a kind of artificial board. Plywood, also known as plywood, the line is commonly known as fine core board. Made of three or more layers of a single sheet of a millimeter thick veneer or glued. Handmade furniture is the most commonly used materials.

Q:The difference between a large board and a plywood

The vertical direction of the core plate (the difference between the core and the material) is poor, but the lateral flexural strength is higher. Both nail grip and water repellency are availableBetter than MDF and chipboard. The surface is generally rough and needs finishing (paint or decorative panels etc.). Simply speaking,A large piece of carpentry that must be nailed at home usually requires a large core board.But the large board itself uses a lot of glue, and a lot of glue or paint will be used in the finish, and the core boardPollutants are in open volatile state, so, home improvement must strictly control the use of large core board.

Q:Is the plywood good?

Symmetry principle: single center plane plate on both sides of the water regardless of 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 the corresponding layer plywood the principle of equivalent stress in different directions. 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:What is the difference between a plywood door and a solid wood door?

Plywood door material:Plywood door, ordinary plywood door is made of wood, porous plate, high density board for both sides of the door core, door trim panel with the flat part of the viscosity pressure in the box on the groove part with paste veneer or cardboard, processed; the door light quality, the price is low, but because of the limitation of technology, surface color difference large, round the door can only stick wood, cardboard or wooden nails on the edge.A simple plywood door is smooth, clean and sanitary requirements, but the quality as the glue and plywood, usually damp unglued, light easy to crack, should not be used if it is outside the door; door splint do effect, can be directly used three plywood veneer, but now the three plywood quality is not very good, so now more red beech or red walnut instead of one, these two panels are cheap, not much expensive than three plywood, veneer and smoothness than plywood better, paint construction is also easy.The frame around the plywood door generally adopts wood edge lines, one is beautiful, and the door is not easy to deform; there are a lot of decoration company in the budget for this door may be too; the name "plywood door" not good, listening to customers might find this kind of door of low grade, so we will give the door has a good name: "craft door"; the door making method simple, less material, so its price is the cheapest in several door; but a door is the largest sales.

Q:What kind of glue does bamboo plywood use in general?

The four roller coating machine soluble phenolic resin on bamboo roller gelatinize for water, 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:Excuse me: is there a rubber board in the building material market that can replace glass instead of glass?

PC endurance board (also known as polycarbonate solid plate, PC bulletproof glass, PC solid plate) is made of high-performance engineering plastic - Polycarbonate (PC) resin.

Q:What is the thickness requirement of the insulation board in the distribution room?

Electrical properties and thickness requirements of insulating rubber sheets:1, 500V below the distribution room, choose 5mm insulation board, power frequency withstand voltage test 3500V1 minutes, not breakdown; in power frequency voltage test 10000V, 20S shall not breakdown.2, 10KV below the distribution room, choose 8mm insulation board, power frequency withstand voltage test 10000V1 minutes, not breakdown; in power frequency compression test 18000V, 20S breakdown.3, 35KV below the distribution room, choose 10--12mm insulation board, power frequency withstand voltage test 15000V1 minutes, not breakdown; in power frequency compression test 26000V, 20S breakdown.

Q:The difference between wood cored plywood

Woodworking boards are made of plywood, but plywood is not necessarily a wood board. Plywood is the use of wood glue will be laminated or more pieces of wood together. The board is the number of pieces of wood glued together, then both sides of paste wood leather.