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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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