Three reasons for low bonding strength of plywood

Gluing strength refers to the degree of firmness of bonding between individual veneers in plywood. Adhesive strength is one of the important indicators for measuring the quality of plywood.
The reasons for low bonding strength or delamination of the adhesive layer can also be analyzed from three aspects: raw materials, process, and equipment:
1. Defective raw materials
There are quality issues with purchased boards, such as poor rotary cutting quality or deep burrs and grooves; The moisture content of the veneer is not appropriate; Poor quality, deterioration, or low concentration of adhesive.
2. Non compliant operation process
The glue application process is not up to standard, with too little glue application or uneven glue application; The aging time of the coated veneer is too long or too short; Inappropriate hot pressing parameter settings, such as insufficient hot pressing pressure, low hot pressing temperature, or short hot pressing time.
3. Equipment malfunction
If the pressure cannot increase or the temperature is not transmitted properly.
The solution also starts from these three aspects, controlling the quality of raw materials, strictly controlling the quality of processes, and regularly repairing and maintaining equipment.