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Many graphic and text store owners are afraid of changinghot melt adhesive pellets——Afraid of blocking rubber hoses, afraid of temperature switching problems, and afraid of wasting glue. In fact, as long as you follow the steps, it can be done in 15 minutes without stopping the machine for too long. The following is the standard glue changing process using Sunlife hot melt adhesive granules as an example.
Q: Can different brands of granules be mixed?
A: Not recommended. Mixing hot melt adhesive particles with different formulas may result in compatibility issues such as delamination and decreased adhesion. If a transition is necessary, rinse the hose thoroughly using steps 3-4.
Q: Does the first bound book always not stick firmly after changing the glue?
A: This is a normal phenomenon during the transition period of mixing old and new rubber residues in the hose. Squeezing 50-100g of mixed adhesive waste before starting formal binding can solve the problem.
Q: How often is it appropriate to change the glue?
A: It is recommended to clean the glue pot once a week and replace it with new glue every 1-2 weeks. If the glue is not replaced for a long time, repeated heating of the glue solution will cause severe aging, yellowing, and brittleness.
Direct answer: The back adhesive layer of wireless adhesive packaging for books and periodicals is usually controlled at 0.6-1.0mm, and the side adhesive is 0.2-0.4mm; the thickness of the adhesive dots/lines for corrugated cardboard box sealing is generally 0.3-0.8mm; the thinnest layer for color box pasting is 0.15-0.3mm.The thickness is not necessarily better, sufficient, uniform, […]
Hot melt adhesive particles are a type of thermoplastic adhesive. At room temperature, it is a solid state, but due to the influence of temperature increase, it will flow softly and reach a liquid state at high temperatures. After being applied to the surface of the material, the hot melt adhesive will lose heat and […]
What is the reason why EVA hot melt adhesive does not stick? Some time ago, a customer asked us why we couldn’t stick books firmly when bonding. Through this small case, we will answer the question: What is the reason why hot melt adhesive does not stick? When bonding books, if EVA hot melt adhesive […]
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 […]
