List of Temperature Differences for Double Pot Adhesive with Back Adhesive and Side Adhesive: Quick Search for Corresponding Parameters for 4 Book and Publication Specifications

Why do the back glue pot and side glue pot have different temperatures?

The functions of the back glue (spine glue) and side glue (cover and book core side adhesive) on the book binding line are different: the back glue needs to penetrate deeply and have high adhesive strength; The side glue needs to cure quickly and the glue line should be thin and narrow. Two different needs correspond to differenthot melt adhesive pelletsModel and operating temperature.

• 1. Thin manual（<10mm）Back glue at 165-170 ° C/side glue at 160-165 ° C, with a temperature difference of 5 ° C. Thin books have narrow spines, so the back glue temperature should not be too high to avoid glue leakage.
• 2. Standard textbooks (10-25mm)Back glue at 170-180 ° C/side glue at 165-170 ° C, with a temperature difference of 10 ° C. The most common specification is for each pot to perform its own duties.
• 3. Thick dictionary (>25mm)Back adhesive 175-185 ° C/side adhesive 165-170 ° C, temperature difference of 15 ° C. Thicker adhesive requires higher back adhesive temperature to ensure deep penetration.
• 4. Copperplate paper books and periodicalsBack glue 175-185 ° C/side glue 170-175 ° C, temperature difference of 10 ° C. Copperplate paper has poor wetting properties, and both pots need to be raised by 5 ° C.

Sunlife hot melt adhesive particles have the best bonding performance for the back and side adhesive types within the recommended temperature range, please do not deviate arbitrarily.

Frequently Asked Questions (FAQ)

Q: Can we use the same glue for two pots?

A: Sure, but not recommended. Universal hot melt adhesive particles serve as both backing and side adhesives, but their performance is not as good as specialized types. It is recommended to use separate pots for mass production.

Q: What happens if the temperature of the side adhesive is set too high?

A: Overheating of the side glue can cause excessive fluidity of the glue, widening of the glue line, and overflow of glue onto the cover. The temperature of the side adhesive generally does not exceed 170 ° C.