Plywood is used as a kind of artificial wood
Because of its excellent performance and practicality
It has been widely used in the field of housing construction
And high quality plywood
The structure and the number of layers have certain requirements
In the process of plate processing, in order to improve the anisotropy of natural wood as much as possible, so that plywood wood uniformity, shape stability, in the structure, plywood needs to comply with two principles: one is symmetrical, the other is the adjacent layer of veneer fibers perpendicular to each other.
The principle of symmetry is to require that the veneer on both sides of the central plane of the plywood, whether it is the nature of the wood, the thickness of the veneer, the number of layers, the direction of the fiber, the water content, etc., should be symmetrical with each other. In the same piece of plywood, you can use the same tree species and thickness of the veneer, you can also use different tree species and thickness of the veneer, but symmetrical veneer, tree species and thickness must be the same.
Natural wood is characterized by easy cracking along the grain direction, while plywood is interlaced with vertical laminated wood, so there is no need to worry about possible cracking when nails or screws are screwed. Due to the balanced structural characteristics of plywood, the forces of adjacent boards can cancel each other, thereby reducing the warping deformation of wood due to anisotropy and wet expansion and dry contraction.
Plywood is usually made
Odd number of layers such as 3, 5, and 7
So here's the question
In the case of a fixed thickness
Is the more layers of plywood the better?
The more layers of plywood, it means the better the improvement of wood anisotropy, but the more layers also means the use of more glue, the need for more environmentally friendly glue to meet the requirements.
Fuqing LVL, together with 1 research institute and 3 universities, has developed a resin adhesive with formaldehyde release ≤0.025mg/m³ after 65 factory tests and 18 technical improvements, promoting product upgrading with green environmental protection.
In addition, the more layers, the smaller the thickness of the veneer, which puts higher requirements on the type of wood and the production process, so the quality and price of plywood with more layers will be correspondingly higher.
Fuqing LVL regards quality as the lifeline of the enterprise, selects natural raw materials, intelligent production, full-time personnel, and does a good job of quality supervision of the whole process. The plywood produced by Fuqing LVL has won the favor of customers at home and abroad with its high quality and cost-effective, and the sales volume of the same category is the first in Japan.
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