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The surface of velvet (corduroy, velvet, short hair velvet, etc.) is covered with fine fluff,hot melt adhesive pelletsAfter coating, it is easy to penetrate into the gaps of the fluff instead of sticking to the base fabric, resulting in low initial adhesion and easy detachment upon light pulling. In addition, velvet fabrics are mostly made of polyester or blended fabrics, with low surface energy. The general EVA rubber particles have insufficient wettability, and the bonding effect is often not ideal.
The key lies in two points: ① Good fluidity of the adhesive solution, which can penetrate through the fluff layer and infiltrate the base fabric; ② The adhesion to polyester/blended fabric should be high. It is recommended to use low viscosity modified EVA or PO based hot melt adhesive particles, with a coating temperature of 170-180 ° C and an opening time of 3-5 seconds, allowing time for the adhesive to penetrate the fluff layer and reach the base fabric. Sunlife hot melt adhesive has a special model for velvet, which has been tested by multiple gift packaging factories and has a peel strength of over 3.5N/cm. It can be repeatedly bent without shedding velvet.
Why can’t EVA hot melt adhesive stick? Hot melt adhesive is a widely used adhesive in industrial production processes, but there may be inevitable non stick situations during application. So what are the reasons that affect the viscosity of hot melt adhesive? It is mainly divided into the following three categories: 1 EVA hot melt […]
What is wireless adhesive binding? Wireless adhesive binding refers to a binding method that uses adhesive to fix the pages of printed materials on the spine of a book. Unlike traditional wired binding, wireless adhesive binding does not use wire or thread, but instead uses glue to bond the book core. The book core processed […]
For most terminal packaging operations, adhesive carbonization is usually the main cause of most downtime events. Once EVA hot melt adhesive carbonization occurs, it will be difficult to clean thoroughly without taking extreme measures. Even after flushing, charcoal may still stick to narrow corners and continue to cause issues that affect normal operating time and […]
The common problem is that the film cover cannot stick to the book cover After the surface of the hardcover book cover (waist cover/outer cover) is coated with film, the surface energy of the film layer is extremely low,hot melt adhesive pelletsDifficult to wet and penetrate, resulting in weak adhesion between the protective cover and […]
