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The curing speed of EVA hot melt adhesive refers to the time from the beginning of adhesive bonding to the moment when the bonding strength reaches 80%. The curing time required for general use ranges from 1 second to 10 seconds, and the curing speed required for automatic sealing is generally within 4 seconds. There are many factors that affect the curing speed of hot melt adhesive.
Firstly, the type of EVA has little effect on the curing speed, but the trend is that EVA hot melt adhesives with low melt index and EVA content correspond to faster curing speed.
The second is the role of thickening agents. Choosing a viscosity enhancer with a high softening point and increasing its dosage can help improve the curing speed. The use of tackifiers has a significant impact on the curing speed.
Finally, wax has an impact on the curing speed. Wax usually plays a role in viscosity regulation and partial plasticization in EVA hot melt adhesive systems. Wax has the greatest impact on curing speed.
The general rule is that the higher the softening point of wax, the faster the curing speed. The more wax is used, the faster it solidifies. However, wax has a significant adverse effect on adhesive strength, so the adjustment of curing speed is limited to relying solely on wax.
What creates high-performance book and magazine edge glue? When dealing with difficult paper, medium to medium curing adhesives can provide better adhesive penetration between pages and on the cover. When the paper quality is easier to adhere, fast curing products are usually used in high-speed magazine production lines. The viscosity of the adhesive you choose […]
Direct answer: EVA hot melt adhesive granules are used for book and magazine packaging, and the glue pot is generally set at 160-180 ℃; The packaging and sealing scenarios are mostly between 150-170 ℃; The recommended construction temperature provided by the rubber particle manufacturer shall prevail, and the fluctuation should not exceed 10 ℃. The […]
The root cause of UV ink printing surface not sticking to hot melt adhesive isThe surface energy of the cured UV ink layer is extremely low (usually below 34 dynes), and the adhesive cannot wet and spreadIt can only stop on the surface to form a “false adhesion”, and when subjected to a slight force, […]
In book binding with copperplate paper as the inner page, due to the thin film covering the surface of copperplate paper, there is a high demand for the adhesive used. It is difficult for people to bind books and periodicals with white glue in order to make them more firmly attached to copperplate paper. After […]
