In the process of using hot-melt adhesives, due to changes in various situations, various problems will be encountered. To solve

these problems, you must have a comprehensive understanding and comprehensive analysis of various factors. Such as temperature,

humidity, thickness, speed, surface, pressure, mechanical force and other factors. Next, Qingdao Sainuo polyethylene wax

manufacturer will discuss with you two points of analysis and solutions to common problems of edge banding hot melt adhesive.

1. Loosen after bonding

1) Unqualified melamine edge releases substances causing degumming

2) Unqualified PVC edge coating (medium) is incompatible with hot melt adhesive

3) Oily veneer edge banding with incompatible hot melt adhesive

2. “Glue thread” is produced during glue application

The setting temperature of the glue machine is too low

Hot melt adhesive has deteriorated before use

Inappropriate glue application procedures and methods (too much glue applied)

The temperature difference between outdoor and indoor (construction site) is large, and the convection of air easily changes the

ambient temperature (especially in winter)

3. There are stains on the edges or too much adhesive

1) Excess glue

2) Mechanical failure in the trimming procedure

3) The position of the glue is not appropriate

4) Hot melt adhesive machine set temperature is too high

4. Insufficient or uneven glue application

1) There is blocking glue during pre-melting process or at the glue outlet, which may cause uneven glue application

2) The machine’s operating load capacity is not enough to completely melt the adhesive

3) The temperature setting of the hot melt adhesive machine is too low

5. Excessive smoke or odor

1) The set temperature is too high

2) Incorrect mechanical current device

3) The thermostat of the glue machine is faulty

4) Heater malfunction

5) Hot melt adhesive machine is not clean and mixed with other impurities or dust is not clean and mixed with other impurities or

dust

6. Hot melt adhesive discolors seriously

1) Contaminated, forming oxidation

2) Material deteriorates after being heated or high temperature

3) The hot melt adhesive machine works for a long time without edge banding

Today introduced the first six of the common problems and solutions of edge hot-melt adhesives. The next article introduces the

remaining parts.

Qingdao Sainuo Chemical Co.,Ltd.  We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA, EBS, Zinc / Calcium

Stearate…… Our products have passed the REACH, ROHS,PAHS, FDA testing.

Sainuo rest assured wax, welcome your inquiry

Website：https://www.sanowax.com

E-mail：sales@qdsainuo.com

               sales1@qdsainuo.com

Adress：Room 2702,Block B, Suning Building, Jingkou Road, Licang District, Qingdao, China