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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:
Answer directly The adhesive inner pages of promotional brochures should be specially bound for book binding and have good toughnessHot melt adhesive granulesFocus on liquidity, opening time, and resistance to cold brittleness. Here are four common misconceptions: stepping on them can easily cause pages to fall off and book spine to crack. Misconception 1: The […]
How to solve the troubleshooting of packaging hot melt adhesive? Hot melt adhesive is some of the most advanced adhesives used today, but even with daily maintenance, adhesive problems can still occur. This guide aims to help manufacturers overcome some of the most common adhesive challenges faced in packaging applications. There may be various reasons […]
First of all, the conclusion is that the powder on gold and silver cardboards is mostly due to “surface coating not being treated properly” or “glue temperature not being pressed down” Gold and silver cardstock is coated with a layer of gold and silver foil or PET aluminum plated film on the surface of the […]
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 (1) The milling groove is too shallow […]
