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Book and magazine adhesive packaginghot melt adhesive pelletsThere are two major camps based on curing speed: cold glue type (opening time 12-20 seconds, slow curing) and fast curing type (opening time 4-8 seconds, fast curing). Which one to choose does not depend on ‘which one is better’, but on how thick your book is and how fast the machine is.
| indicator | Cold glue type | Quick fix type |
|---|---|---|
| Opening hours | 12-20 seconds | 4-8 seconds |
| fully cured | 60-90 seconds | 15-30 seconds |
| Suitable for thick books | >20mm thick book | <15mm薄本 |
| Suitable for machine speed | <400本/小时 | >500 books per hour |
| Penetration depth | deep | shallow |
| Price | slightly higher | benchmark |
Thick textbook (>30mm): Cold glue type is the only option, and the glue solution needs enough time to penetrate multiple layers of paper seams. Sunlife hot melt adhesive SL-168 cold glue type has an opening time of 15 seconds, allowing for the most thorough penetration of thick book spine. Thin manual（<10mm）：快固型效率翻倍，开放时间6秒即可完成全流程。
Q: What type of book is suitable for medium thickness (15-20mm)?
A: It depends on the machine speed. Slow speed（<400本/小时）选冷胶型更稳；高速选快固型但需确认铣背深度足够。
Q: Can fast fix models be made into thick materials?
A: Not recommended. Insufficient opening time leads to the infiltration of adhesive into deep paper seams, significantly increasing the risk of thick pages falling off.
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Hot melt adhesive is mainly made of EVA as the base material, with additives such as tackifying resin, wax, and antioxidant added. It is processed through batching, melt mixing, extrusion, cooling, granulation, screening, and packaging. Sunlife hot melt adhesive is manufactured by Foshan Jucai Base.
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