Three commonly used methods for making plywood

The production methods of plywood are generally divided into three types: wet heat method, dry cooling method, and dry heat method. Dry and wet refer to whether the veneer used for gluing is dry or wet. Cold and hot refer to using hot press bonding or cold press bonding.

The disadvantages of wet heat production are: due to the high moisture content of the veneer, the hot pressing time is long, the productivity is low, and the plywood needs to be dried after hot pressing. Due to being produced by the wet heat method, the board has high internal stress, is prone to warping and deformation, and has low bonding strength.

The disadvantage of dry cooling production is that due to the long pressurization time, the production cycle of plywood is long. More suitable for production in small businesses.

Dry heat production: It is the process of using rotary cut veneers to be dried and coated with glue within the moisture content range of 8-12%, and then pressed into boards in a hot press. The production characteristics of this method are: due to the high temperature bonding, the time is short, the output is large, and the bonding strength is high, and the product quality is good. The board surface is smooth and flat, and not easily deformed. Suitable for the production of various types of adhesives.

Due to this method overcoming the drawbacks of wet heat and dry cooling methods. Production is more flexible, and can be produced by large, medium, and small enterprises. The products produced are more suitable for the needs of the market. Therefore, dry heat production is commonly used in the production of plywood by various domestic and foreign enterprises.