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Preventive measures for EVA hot melt adhesive in binding

2022-09-23    Views: 1

EVA hot melt adhesive is different from regular cold melt adhesive. According to its characteristics, the following points must be mastered and noted during use:

EVA hot melt adhesive

1、 Understand and master the models and technical performance (including technical parameters) of each EVA hot melt adhesive. Different types of hot melt adhesives have different opening and curing times. Especially, it is necessary to strictly distinguish the use of summer glue and winter glue. When the temperature is different, the opening and curing time will also change.

When using EVA hot melt adhesive, do not heat it directly with an open flame. Be sure to heat with isolation oil (the boiling point of water should reach 100 ℃) or use a sealed electric heating plate. Before using solid EVA hot melt adhesive, it must be preheated with a preheating device and then released into the working glue box of the adhesive. The preheating time is generally around 2 hours. When using glue, do not directly mix solid glue blocks (i.e. glue that has not been preheated) into the glue box to prevent  Poor fluidity of glue or applying partially melted glue on the back of the book, resulting in uneven application of glue. The amount of glue in the preheated glue pot should be controlled properly. If too much is used, the glue will melt one by one, causing deterioration and aging, reducing viscosity, and affecting adhesion. The entire bonding process must be completed within the opening time of the hot melt adhesive. If the machine is stopped due to a malfunction, the books in the bookshelf must be removed in a timely manner, and the book core must not stay above the glue wheel. When repairing wireless adhesive binding equipment for a long time, the pre coating glue and working glue pot should be turned off to prevent glue aging. The temperature of the molten colloid should be strictly controlled within the range of use.
  • Regularly clean the pre coated glue pot and working glue box, keep the glue pot clean, prevent impurities from accumulating in the glue, affect the temperature control accuracy, and even cause the temperature controller to malfunction, resulting in glue burning.. Under normal production and operation conditions, preheated glue pots should be cleaned every 3 months. The work glue box (used for gluing) should be cleaned every half month. A cleaning system for glue pots should be established to facilitate implementation.
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