The usage environment of EVA hot melt adhesive

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:

• Enterprises with better conditions are advised to install constant temperature equipment and humidity measuring instruments in workshops that use wireless adhesive equipment to ensure normal temperature and humidity.
  • . Efforts should also be made in other aspects to create conditions for scientific and standardized management and production. In the absence of these conditions, the following principle can be temporarily followed: when the temperature is high in summer, the temperature of the hot melt adhesive should be lowered by about 10 ℃, so that the opening and curing time of the adhesive can basically meet reasonable requirements. Books that have undergone wireless bonding processing should be stored in a warehouse or workshop at a temperature of 1-45 ℃. And it is strictly prohibited to store them on walls, heating systems (in winter), windows, and outdoors for a long time. Avoid moisture or overheating that can cause deformation of the paper, alter the adhesive, and result in irreparable losses.