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The glue roller on the book binding line is used for coatinghot melt adhesive pelletsThe core components. Once the roller surface is worn, the adhesive layer will experience uneven thickness, breakage, overflow, and other problems, directly affecting the bonding strength and appearance quality of the spine.
Typical manifestations of rubber roller wear include thick and thin adhesive layers on one side of the spine, missing glue in some paragraphs, and local bulging after the cover is attached to the book core. The causes of wear include long-term high-temperature operation leading to aging of the roller surface coating, scratches from hard objects, and adhesion and erosion of carbides in the adhesive solution.
Sunlife hot melt adhesive has a low amount of carbide production, which can effectively slow down the wear rate of the coating roller.
Q: Is there a relationship between the wear of the glue roller and the quality of the adhesive particles?
A: It’s related. Colloidal particles with a high amount of carbides will erode the roller surface like sandpaper. Choosing adhesive particles with good thermal stability can significantly extend the lifespan of the roller surface.
Q: How long can the roller surface be used after grinding?
A: Grinding once can extend the service life by 2-3 months, but the coating on the roller surface will gradually become thinner. It is recommended to grind it twice at most and replace it with a new one.
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