Is it difficult to apply hot melt adhesive particles in winter? The Winter Story of a Printing Factory

Hot melt adhesive granulesIs it difficult to apply glue in winter? The Winter Story of a Printing Factory

The book printing factory in the east of the city has a headache every winter: the glue binding line often has spine scratches and local empty glue, resulting in a high rework rate. The boss once thought that the machine was old and replacing the glue tank heating tube was useless.

Root cause in temperature chain

The technician found that the problem was not with the particles themselves, but with several broken links in the “temperature chain”: the workshop was not insulated, the cardboard boxes were still cold when they were moved in from the outside, and the heat was instantly absorbed by the substrate when the adhesive was applied. Insufficient penetration resulted in false solidification; In addition, the temperature control of the glue tank is too low, and the fluidity cannot keep up with the high-speed line.

After three adjustments, it stabilized

• Adjust the temperature of the glue tank by 5 ℃ according to the Sunlife hot melt adhesive process card, and add insulation cotton.
• The cardboard box should be warmed up for half an hour before entering the workshop to avoid the cold substrate grabbing heat.
• Switching to the same brand of low-temperature fast solidification particles, the opening time is more suitable for winter.

Boss’s Summary

It’s difficult to apply glue in winter, probably due to the craftsmanship and environment, not the glue itself. Identify manufacturers with stable parameters and willing to provide process support. Sunlife hot melt adhesive from Guangzhou Sunlife Trading comes with process cards for each batch, which can be directly adjusted in winter, resulting in a significant reduction in rework rate.

Frequently Asked Questions (FAQ)

Q: Do we have to set the glue temperature very high in winter?
Answer: Moderate increase is sufficient, the key is the substrate temperature recovery and adhesive tank insulation.

Q: Is it troublesome to replace the low-temperature quick fix adhesive?
Answer: Just add new particles to clear the groove, Sunlife particles transition smoothly.

Q: What if a small factory doesn’t have the conditions for insulation?
Answer: At least letting the paper and glue temperature return according to the process card can solve most of the problems.

In winter, the production line is unstable. Please find Guangzhou Sunlife Trading to obtain Sunlife’s hot melt adhesive overwintering process plan.