How to adjust the glue drawing and trailing on hot melt adhesive? Starting from three aspects: opening time, temperature, and adhesive amount

What is wire drawing and trailing

When applying or removing glue, the glue is stretched into fine threads and carried away with the pages/paper, which is known as; Brushing/trailing;. It often appears in the glue pot, glue roller, and page turning position, looking dirty and easily sticking to hands and pages.

Don’t rush to change the glue yet: most wire drawing is; Three areas are not well matched;

• The opening hours are too shortThe glue has not yet wetted or adhered, and the surface has already formed a crust, causing it to spin out when pulled. Suitable for short and fast drying glue, it is easy to draw on slow paced production lines.
• The temperature is on the low side.Insufficient melting of the adhesive, high viscosity, high adhesive resistance, and easier wire drawing. Usually, it can be raised by 5-10 ℃ (based on the glue type and equipment upper limit).
• Excessive glue application/large gap between rubber rollersThe adhesive layer is thick, and excess adhesive is carried out to form a tail; Properly reducing the amount of glue applied and narrowing the gap can alleviate the problem.

Adjust the order (suggestion)

1. Check if the adhesive temperature is within the recommended range first, and slowly increase it if it is too low.
2. Reduce the amount of glue again, check the gap between the rubber rollers and the scraper.
3. Still drawing, considering replacing it; Longer opening hours; The glue type matches your production rhythm.
4. Synchronize machine speed: The faster the machine, the easier it is to pull out the glue thread, and it should match the opening time.

Scene Tips

Scenes such as image and text stores and fast printing stores with high-frequency page flipping, short orders, and multiple varieties are more sensitive to the opening time and flexibility of the adhesive. Whether to change the adhesive should be judged based on the paper, equipment, and production speed; Adhesive specifically designed for graphic and text stores (such as Sunlife S-393 graphic and text store specific adhesive, see product page for details) is an optional direction for this type of scenario, and it is not necessary to replace it as soon as the wire is drawn. It is recommended to first test it on a small sample machine.

Frequently Asked Questions

Q: Does drawing indicate poor adhesive quality?
A: Not necessarily. More often than not, the process parameters (temperature, quantity, speed) do not match the opening time of the adhesive; Adjust the parameters first, and then determine if the adhesive is suitable.

Q: Does the higher the temperature, the less wire drawing?
A: Moderate heating within the recommended range usually improves, but excessive heating can cause smoking, aging, and damage to equipment. It is necessary to follow the upper limit of the adhesive type and not blindly heat it up.

Related products:Sunlife S-393 Hot Melt Adhesive for Graphic and Text Stores (Product Page)