In the last article, we learned about the first half of the analysis and solutions of common problems of edge-sealing hot-melt

adhesives. This article Qingdao Sainuo polyethylene wax manufacturer will take you to understand the remaining contents.

1. The edge banding is easy to fall off during the trimming process

1) The glue is too thin

2) The material is too cold or humid (especially if it is just glued)

3) If the glue line is clearly visible and shows the pattern of the glue roller, the temperature of the glue roller may be too low

4) Conveyor belt speed is too slow

5) The temperature of the surrounding environment or the material temperature is too low (working below 15°)

6) Insufficient pressure

2. The initial position and position of the edge banding are not ideal

1) The roller pressure roller needs to master the skills to make adjustments and extend the position to increase the roller pressure.

2) The 5cm position at the beginning or end of the glue roller glued to the panel often appears to be unsatisfactory, because the glue

roller is prone to insufficient pressure at the head and tail positions, and when it is in a high-speed production state, the glue roller

and the panel are prone to jump.

3. The effect of bonding the two sides is good on one side and bad on the other

1) Poor contact between panel (substrate) and pressure roller

2) Uneven application of glue can cause glue to ooze, which can hinder the edge-sealing process

4. Intermittent poor adhesion

1) The liquid state temperature of the hot melt adhesive is too low

2) When the speed of the edge banding machine is too fast and the amount of glue applied is too high, the hot melt cylinder fails to

melt the hot melt adhesive in time, resulting in uneven coating

3) The temperature of the fuser is unstable

5. The edge banding will soon detach after bonding

1) The temperature of hot melt adhesive, edge banding, substrate, cargo or pressure roller is too high

2) The temperature (room temperature) of the construction environment is too high

3) Too much glue

4) The humidity of the edge banding or the substrate is too high

5) The base material and the edge sealing itself contain resin (oily) components, so the viscosity is reduced, which most often occurs

in the process of using wood veneer/solid wood edge sealing

6. There are flower marks on the edge sealing surface

1) The edge material is too thin and the surface wear resistance is weak

2) The edge of the panel is rough

3) The adhesive film lacks elasticity

7.  There is a nib shape or bulge on the surface of the edge banding

Because the hot melt adhesive has been contaminated by dust particles or wood fragments, etc., the unevenness will appear after the

pressure, so you need to ensure that the hot melt is clean

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