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The common quality problems of wireless binding hot melt adhesive mainly include page dropping, uneven back, broken book core, bubbles, and perforation at both ends of the book. They often appear on single or multiple banks, mainly due to the following reasons:
1、 Analysis of Page Dropping Reasons
2、 Analysis of the reasons for incomplete books
Hot melt adhesive technology features Fast solidification speed, solidifying within a few seconds, with the characteristics of heating, melting, cooling, and pasting, convenient for continuous and automatic high-speed operation, improving production efficiency and reducing costs; Hot melt adhesive particles have a 100% solid content, are solvent-free, environmentally friendly, non-toxic, energy-saving, and have no secondary pollution […]
What is the softening point The softening point ishot melt adhesive pelletsThe temperature at which a solid state transitions to a soft plastic state is typically measured using the globe method. It directly affects the heat resistance, curing speed, operating temperature window, and storage requirements of the adhesive particles. When selecting, looking at the softening […]
Under standardized storage, the shelf life of EVA hot melt adhesive granules is usually 12-24 months; Polyolefin and other systems can last longer. But ‘shelf life’ does not mean ‘just leave it at will’, the environment determines the actual usable time. Key factors affecting shelf life Reference for shelf life of different systems system Reference […]
First, correct the conclusion: Hot melt adhesive particles do not have better viscosity at higher temperatures. Heating for a long time above the recommended temperature of 10 ℃ will cause the colloid to oxidize and degrade, resulting in a decrease in adhesive strength instead of an increase. It can also cause a series of problems […]
