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More and more books are using EVA hot melt adhesive for binding process. Almost all of them are used in large, medium, and small processing plants across the country. There will still be an upward trend in the future. This is because using this adhesive results in fast book publishing speed, short cycle time, aesthetically pleasing books, and eliminates several processes. But often because printing factories are eager to get started and strive for more processing, they overlook the scientific nature of the environment and conditions for using hot melt adhesive, resulting in many problems during the processing. The following points are provided for users’ reference:
Effects of Temperature and Humidity in Production Workshops
EVA hot melt adhesive is a type of thermoplastic adhesive. The opening time after application is affected by indoor temperature and humidity. Generally, the indoor (i.e. workshop) temperature should be kept constant. The optimal temperature is between 15-26 ℃, and the humidity should be maintained at around 50%. However, it is understood that very few units nationwide that use hot melt adhesive can meet this requirement. Therefore, when hot melt adhesive is used in many areas, there are too many bubbles in summer, making it difficult to cure and cool down. In winter, the adhesive solidifies, the cooling time is shortened, the bonding is not firm or sticky, and the book breaks after pasting. In other regions, due to high humidity, the book behind the cover is not properly shaped and cannot be cut, etc. These phenomena are directly related to the temperature and humidity in the workshop. So the requirement is:
Packaging and sealingHot melt adhesive granulesWhat brand is good? Many people’s first reaction when choosing sealed box hot melt adhesive granules is to “pick big brands”. But sealing the box is a mass production activity, and a true “good brand” must meet three things: sticking firmly, continuous supply, and providing process support. Just looking at […]
Direct answer:Hot melt adhesive particles belong to thermoplastic materials and can theoretically be melted repeatedly, but in most cases, “recycling and reuse” on the production site is not cost-effective or safe.There is only one situation that can be recycled – clean residue that has never been used on the machine and has not been contaminated; […]
Direct answer: The consumption of adhesive particles is relatively high, and 90% of the problem lies in four areas – excessive setting of adhesive amount, waste caused by improper temperature, equipment leakage, and mismatched selection of adhesive particles. After item by item investigation, most factories can reduce unit adhesive consumption by 15% -30% without sacrificing […]
Direct answer: FormalHot melt adhesive pelletsThe free sample sending process of manufacturers is usually “proposing requirements → explaining working conditions parameters → confirming sample model and quantity → sending for free (usually SF Express collect or free shipping for the first time) → customer testing on the machine → feedback results before adjustment”. The entire […]
