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hot melt adhesive pelletsHeating in the glue pot for a long time will cause the resin and thickening agent to slowly decompose, forming black carbides that deposit on the bottom of the pot and the wall of the rubber tube. Carbides not only affect the purity of the adhesive solution (causing a decrease in adhesion and darkening of the adhesive color), but also block the rubber hose and scratch the coating roller, which must be cleaned regularly.
Q: How often is it appropriate to clean the glue pot?
A: Mild use (graphic store): Hot melt cleaning once every 2 weeks. Heavy use (three shifts in the book and magazine factory): once a week. Deep mechanical cleaning is conducted once every quarter.
Q: Does the mixture of carbides in the adhesive have a significant impact on the quality of binding?
A: Very big. Carbonized particles can cause local weakness and uneven adhesion in the adhesive layer, which is one of the hidden reasons for page loss in books and periodicals.
Q: Is it okay to scrape the glue pot with an iron shovel?
A: No way. The iron shovel will scratch the PTFE coating of the glue pot, accelerating the adhesion of carbides. Please use a silicone spatula or wooden spatula.
High temperature resistant hot melt adhesive for books and magazines is mainly based on polyamide resin, so high temperature resistant hot melt adhesive is also known as polyamide hot melt adhesive. Polyamide resin is a linear thermoplastic resin with a large number of repeated amide groups on the molecular main chain. Compared with other thermoplastic […]
Why is it harder to bond aluminum foil coated paper than regular paper? Aluminum foil coated paper has a layer of metal film on its surface, which is dense, smooth, and has low surface energy,Hot melt adhesive granulesIt is difficult to wet after coating, and the initial adhesion is much lower than that of copperplate […]
What should I do if the hot melt adhesive particles are not firmly attached to the coated paper? Direct answer: The root cause of the poor adhesion of laminated paper is mostly due toLow membrane surface energy, glue not eating paper fibers, poor coordination between opening time and compressionThese three points. The surface of laminated […]
Direct answer: To “spread evenly without falling apart”, rely on flexible rubber particles The key to choosing a wireless adhesive book that can be spread out without losing pages is to choose a flexible type that has good extensibility and does not become brittle at low temperaturesHot melt adhesive granulesAdd sufficient milling depth and adhesive […]
