Industrial wood adhesive common problems and solutions

Industrial woodworking adhesive will encounter many problems in the process of using it. Next, I will tell you the reasons and solutions for the problems：

Problem: Glue penetrates too fast or opens too long
Analysis: The amount of cloth glue is too small, the absorption capacity of the substrate is too strong, or it is affected by environmental factors
Measures: Increase the amount of cloth glue and shorten the opening time.

Problem: Low initial strength
Analysis: The pressing time is too short, the hot pressing temperature is too low or the opening time is too long
Measures: Extend the pressing time, increase the hot pressing temperature, and shorten the opening time.

Problem: Bond strength is not ideal
Analysis: The opening time is too long, the pressure is not enough, and the substrate is difficult to stick
Action: Shorten open time, increase pressure, use new adhesive.

Problem: Glue
Analysis: The amount of cloth glue is too large and the glue is not suitable
Measures: reduce the amount of cloth glue, choose a new adhesive.

Problem: Discoloration
Analysis: The low pH of the glue causes the glue to react with the chemicals in the wood
Action: Use D2 system glue.

assemble
Problem: Penetration is too fast, opening time is too long
Analysis: The amount of cloth glue is too small, the absorption capacity of the substrate is too strong, or it is affected by environmental factors
Measures: Increase the amount of cloth glue and shorten the opening time.

Problem: No bond strength
Analysis: The pressing time is too short, the opening time is too long, the wood processing accuracy is too poor, the pressure is not enough, and the wood moisture content is inconsistent
Measures: Extend the pressing time, improve the wood processing accuracy, increase the pressure, control the wood storage and adjustment, and the moisture content between the two adjacent substrates cannot exceed 2%.

Problem: Unsatisfactory bond strength, smooth film
Analysis: The opening time is too long, and the wood processing accuracy is too poor
Measures: Extend the pressing time and improve the wood processing accuracy.

Waterproof bonding
Problem: Glue penetrates too fast or opens too long
Analysis: The amount of cloth glue is too small, the absorption capacity of the substrate is too strong, or it is affected by environmental factors
Measures: Increase the amount of cloth glue and shorten the opening time.

Problem: Glue thickens
Analysis: After combining with the curing agent, the glue exceeds its active period
Measures: Use the newly prepared adhesive and try to use it up within its active period, and pay attention to stirring.

Problem: Not water resistant
Analysis: Incorrect proportion of curing agent, incorrect direction of annual rings, inconsistent wood moisture content
Measures: strictly follow the proportion of glue, ensure the correct classification of wood, control the storage conditions of wood, and the moisture content between two adjacent substrates cannot exceed 1%.

cold pressing
Problem: Glue is absorbed by the board and the opening time is too long
Analysis: The amount of cloth glue is too small, the absorption capacity of the substrate is too strong, or it is affected by environmental factors
Measures: Increase the amount of cloth glue, shorten the opening time, and improve the processing environment.

Problem: Low bond strength
Analysis: The amount of cloth glue is too small, the pressing time is too short, and the opening time is too long
Measures: increase the amount of cloth glue, prolong the pressing time, and shorten the opening time.

Problem: Surface quality is not ideal
Anatomy: Substrate Surface Swelling
Measures: Reduce the amount of cloth glue.

Problem: Poor wood breakage rate
Analysis: Glue is not suitable, substrate surface is too smooth (for hardwood)
Measures: Choose the appropriate glue, and the surface of the substrate can be planed, but not sanded.

hot pressing
Problem: Glue is absorbed by the board
Analysis: The hot pressing temperature is too high, the amount of glue is too small, the absorption capacity of the substrate is too strong, or it is affected by environmental factors
Measures: reduce the temperature of the infrared lamp, increase the amount of cloth glue, shorten the opening time, and improve the processing environment.

Problem: Low bond strength
Analysis: The amount of cloth glue is too small, the pressing time is too short, the hot pressing temperature is too low, and the opening time is too long
Measures: increase the amount of cloth glue, prolong the pressing time, increase the hot pressing temperature, and shorten the opening time.

Problem: Surface quality is not ideal
Anatomy: Substrate Surface Swelling
Measures: Reduce the amount of cloth glue.

post forming
Problem: Low bond strength
Anatomy: Beyond its opening hours
Actions: Shorten the opening time, increase the temperature of the heating lamp or air heater.

Problem: Low initial strength, cracking
Analysis: The elasticity of the thin plate is too large, and the temperature of the heating lamp is not high
Measures: Increase the temperature of the heating lamp and reduce the feeding speed.

Problem: Cracks after the cloth glue is pressed
Analysis: The amount of cloth glue is not enough
Action: Adjust the equipment, increase the pressure of the pump, increase the temperature.

Problem: The sheet does not fit tightly to the cardboard
Analysis: Too much glue
Action: Reduce pump pressure.

Problem: Low initial strength (products bonded with water glue)
Analysis: Too much residual moisture at the glue line, unreasonable use
Measures: increase the temperature of the heating lamp, reduce the amount of glue, and check the spraying equipment.

Problem: Low initial strength (products bonded with water glue)
Measures: reduce the temperature of the heating lamp and increase the amount of cloth glue.

WinLong are industrial woodworking adhesives manufacturers, if you want to know more, please contact the adhesive experts at internetwoodglue.com.