Hot melt adhesives are more and more widely used in furniture edge sealing, but there are many difficulties encountered in the use. The following is a specific analysis of the common problems of hot melt adhesives for edge sealing by bonding aids:

1. Edge-sealing shedding: check whether the operation is correct, operate according to the machine operation requirements and the correct parameters of hot melt glue; check whether the edge-sealing machine is normal; whether the back coating of the edge-sealing belt is normal, if it is wood-skin edge-sealing, check whether it is a polyester tree species, or whether the wettability of the back non-woven fabric is qualified; whether the type of thermosol is suitable; whether the quality of thermosol is problematic.

Edge Band

2. Insufficient edge-sealing strength: whether the type of hot-melt adhesive used is appropriate; whether the plate is too loose or unqualified, whether the stacking time of the plate is too long, resulting in too much dust on the port; whether the edge-sealing is contaminated; whether the back coating of the edge-sealing is even; whether the hot-melt adhesive temperature fails, the pressure of the edge-sealing machine is insufficient, and the operating pressure of the manual edge-sealing machine depends on manual control, which is particularly prone to the above problems. The operating environment temperature is too low.

Thirdly, thick glue thread: incorrect type, such as fast glue used on slow machine, not bonded, hot melt glue has begun to solidify, resulting in not tight pressing; inadequate plate processing accuracy, poor sawing, not straight cut; deformation of edge band, not horizontal or arc-shaped; wear of pressure wheel of edge-sealing machine, uneven pressure up and down, there will be thick glue line on one side; insufficient pressure of edge-sealing machine, not able to press. Tight, require 3-5kg/cm2 pressure; too much glue, glue overflow.

4. Wire drawing contaminated sheets: poor quality of hot melt adhesive; improper selection of models, such as slow glue used in high-speed machines, hot melt adhesive opening time is too long, slow drying of glue; hot melt adhesive temperature is too high, or the speed of edge sealing machine is too fast; glue amount is too large; glue roller quality is not good, can not be uniformly glued or rationally adjusted.

Edge Band

Fifth, after several days, the spray paint falls off: the edge does not reach high bonding strength, check whether the operation is reasonable, or whether the quality of hot melt adhesives is qualified; the spray paint falls off to check whether the back of the wood skin is too greasy or the wettability of the non-woven fabric (paper); the spray paint falls off to check whether the wood skin is too small, whether the solvent of the paint penetrates into the glue to destroy the film; Hot melt gum quality can not meet the requirements, low-temperature gum is not suitable for this kind of process; improper edge sealing treatment, too thick gum, resulting in poor sealing, solvent easy to penetrate into the film damage strength.