Home > News > Content
Film Faced Plywood Drying Requirements
Oct 24, 2017

Film Faced Plywood Drying requirements
In the film Faced Plywood production process, the need for multi-channel process to ensure the quality of Film Faced Plywood. Where the drying process is essential, it will directly affect the production quality of Film Faced Plywood, determine the life of Film Faced Plywood, it should be in accordance with the standard processing, and strict requirements. Let's take a look at the drying of Film Faced Plywood.
In general, the moisture content is very high, if the direct glue, because too much water will extend the hot pressing time, easy to produce bubbles, will also affect the glue, so to produce Film Faced Plywood The film is very large, easy to deformation and cracking; and wet Film Faced Plywood easy to produce edge cracking, the middle moldy phenomenon, so the peeling of the Film Faced Plywood must be dry in time. The optimum final moisture content of the veneer should be determined according to the required properties of the rubber, tree and Film Faced Plywood.
If the drying efficiency of the dryer and the rate of veneer production, the veneer of the high moisture content will be beneficial, but from the quality of bonding, the water content is high, the quality of the glue decreased; but the moisture content is too low, wood activity decreased, Can reduce the chemical composition of the gluing reaction, and the decrease of the fiber strength on the surface of the veneer affects the bonding strength. Therefore, it is very important to determine the proper final moisture content.
Film Faced Plywood has high stability, good moisture resistance, rich wood texture closer to nature, at the same time affordable by everyone's favorite. The basic sheet of Film Faced Plywood is a particleboard that, when produced in Film Faced Plywood, is bonded using a professional adhesive and is bonded and cured by pressure. How should we control when using adhesives?
By pressing, the gap between the veneers can be reduced, and the filled adhesive can be sufficiently wetted between the veneers to promote the curing of the veneer. The adhesive has the fluidity, can withstand the corresponding load under the conditions of curing, it can carry out to ensure the smooth progress of curing, Film Faced Plywood to ensure high quality. In a high temperature environment, its volatile process can help the process advance. So that a variety of different chemical agents can react quickly, so the adhesive is qualified or not necessary for curing.
Film Faced Plywood is our common sheet, in use will inevitably be a problem. In general, the quality of Film Faced Plywood, one with Film Faced Plywood manufacturers used in the veneer, adhesives and other raw materials related to the second and the production process is not strictly related to the production process requirements. That Film Faced Plywood the most common cracks, is not the same with the two?
Film Faced Plywood and other man-made sheet showing cracking, the most common is the central cracks, cracks at the corner, and cracks in contact with the wall in three ways. Film Faced Plywood The main reason for the existence of cracks is that the wood raw material brittle, tensile, bending strength is low, the ultimate stress is small; or the material hardness is high, the impact strength is poor, in the damage, prone to overall cracking; There may be information high wetting rate, the board will be damp moisture swelling, resulting in cracks crack, which is likely to lead to deformation of the wall.
Therefore, in order to ensure that Film Faced Plywood does not appear cracking problem, in addition to guarantee the quality of raw materials such as veneer, adhesive, etc., in the Film Faced Plywood construction process, but also strict control of the production process.
Film Faced Plywood In terms of physical properties, including water content, density, thermal conductivity and bonding strength, the International Organization for Standardization has proposed from three aspects: the adjacent texture in the structure should be at right angles to each other, In the central layer to maintain the symmetry of the tree species and thickness; in terms of water content in accordance with China's national standards, generally maintained at between 12% -14% (Ⅰ, Ⅱ class average moisture content of not more than 13%; Ⅲ, Ⅳ Film Faced Plywood moisture content can not exceed 15%); in terms of quality, we Film Faced Plywood manufacturers to ensure that the finished rectangular rectangular and obvious edges and corners, in the plate thickness and the number of layers must meet the requirements.