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A book and magazine printing factory in Zhejiang Province uses both back adhesive (high flowability EVA) and side adhesive (fast curing EVA) on the adhesive assembly linehot melt adhesive pelletsTwo glue pots, two sets of temperature controls, changing glue and cleaning are time-consuming and laborious. The factory director asked: Can we simplify the operation with only one type of adhesive particle?
Use the same type of flowable EVA hot melt adhesive particles to make back and side adhesives respectively, and compare them with the original two specialized adhesive particles:
| test item | Specialized backing adhesive+side adhesive | Single adhesive particle universal |
|---|---|---|
| Adhesive permeability | Excellent, the glue penetrates deep into the crevices of the spine of the book | Medium, slightly shallow penetration |
| Initial adhesion force of side adhesive | High, adhesive will stick when applied | Medium, need to extend the compression by 0.5 seconds |
| Flip open the stall ratio | Good | Slightly poor, the side adhesive is slightly hard |
| Page drop rate (per thousand copies) | ＜0.3% | 1.2% |
A universal adhesive particle is feasible but not recommended for products with high quality requirements – the rate of page drop at the side adhesive has increased by 4 times, and the flatness of the spine opening has also decreased. Suggestion: Maintain the dual gel solution for quality sensitive products such as large quantities of textbooks and picture books; Small batches of simple varieties (such as booklets, internal materials) can be simplified using a universal model. Sunlife hot melt adhesive comes in special models for back/side adhesives and universal models. Guangzhou Sunlife Trading can recommend the optimal solution based on production and quality requirements.
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