新闻中心
Direct answer:Firstly, determine which layer the fracture occurred in – whether the adhesive layer separates from the book block, the adhesive layer breaks on its own, or the cover separates from the adhesive layer. The three cracking methods correspond to three different treatment methods.The separation between the adhesive layer and the book block is often due to insufficient milling depth or low adhesive temperature; The brittle fracture of the adhesive layer itself is often due to poor low-temperature resistance of the adhesive particles or too thin adhesive layer; Cover detachment is common when the laminated cover has not been brushed. The after-sales experience of Guangzhou Sunlife Trading is that 90% of the cracked spine can be solved by changing the correct adhesive particles and adjusting the process, without the need to urgently replace the equipment.
| Splitting method expression | Common Causes | solution |
|---|---|---|
| The entire piece of tape fell off with the cover | Shallow milling back and dusty book back | Deepen the milling back by 1-1.5mm, clean the powder and then apply adhesive |
| Brittle fracture and slag falling off in the middle of the adhesive layer | Poor toughness or aging of rubber particles | Replace the book and magazine adhesive particles with good folding resistance, and control the adhesive layer to be about 1mm |
| Cover and adhesive layer peeling off | The coated surface is too smooth | Cover stitching can be roughened or reinforced with side glue |
Q: Is it a coincidence that there are so many cracks in winter?
No. Low temperature can make ordinary rubber particles brittle. Northern winter publications recommend choosing a low-temperature resistant formula, and Sunlife hot melt adhesive has corresponding models for sample testing.
Q: Are spine cracking and page dropping the same thing?
No. Dropping is a single page detachment, which is often related to the amount of glue applied and the paper; Cracking is the overall failure of the adhesive layer, and the focus is on checking the toughness of the adhesive particles and the milling process.
Summary: The cracking of the spine of the book is first caused by layering, and then starting from milling back, glue temperature, and glue particle toughness, selecting the right hot melt glue particles that are suitable for books and periodicals is the fundamental solution.
EVA polymer hot melt adhesive is solvent-free, anhydrous, and 100% solid meltable. Main ingredients: resin, adhesive, viscosity modifier, antioxidant, etc. Fischer Tropsch wax in productionEVA hot melt adhesiveAs a viscosity modifier, it mainly reduces the viscosity of polymers and increases fluidity. EVA hot melt adhesiveTypes of viscosity modifiers: Commonly used viscosity modifiers include paraffin wax, […]
In the packaging assembly line operation, many enterprises encounter serious problems of overheating adhesive wire drawing: after spraying, the adhesive wire keeps winding around the equipment and sticking products, which not only affects the cleanliness of the packaging appearance, but also requires frequent shutdowns to clean the adhesive wire, seriously slowing down the efficiency of […]
How to solve the problem of EVA hot melt adhesive becoming brittle in winter and cracking in summer? Summer is coming soon, and many new factory owners may not have encountered this problem before. There are also some who have encountered similar problems, but they were solved by our factory arranging technical personnel to help […]
Hot melt adhesive is not unfamiliar to cardboard packaging, as it is not only efficient but also cost-effective. Some packaging adhesives, equipment options, and packaging techniques were used when applying hot melt adhesive;. This article helps you understand the technology of hot melt adhesive suitable for your cardboard packaging. Conventional slotted cardboard box (RSC) Use […]
