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As a common packaging material, cardboard boxes play an important role in logistics and transportation. The reason why cardboard boxes can carry and protect items is largely attributed to the bonding effect of packaging hot melt adhesive. This article will explore the bonding effect of packaging hot melt adhesive from the following aspects: the basic principles of hot melt adhesive, the characteristics of hot melt adhesive, the applications of hot melt adhesive, and how to improve the bonding effect of hot melt adhesive.
1. Basic Principles of Hot Melt Adhesive
Hot melt adhesive is a type of adhesive that converts solid adhesive into a liquid state by heating, and then applies it to the surface of the bonded material through coating or spraying, and then forms a solid adhesive layer during the cooling process. The basic principle of hot melt adhesive is to use its viscosity in liquid state to quickly flow and fill the pores and depressions on the surface of the adhesive material when in contact with it, forming a strong adhesive layer.
2. Characteristics of Hot Melt Adhesive
III. Application of Hot Melt Adhesive
Fourth, how to improve the bonding effect of hot melt adhesive
First answer: Having more fine powder does not necessarily mean poor quality, but it is worth asking a question Hot melt adhesive granulesA small amount of fine powder at the bottom of the bag is a normal phenomenon. Particles rub against each other during granulation, cutting, conveying, bagging, and long-distance transportation, inevitably producing powder. The […]
Direct answer: A new sample must be made changeHot melt adhesive granulesSuppliers, even if they claim that the parameters are exactly the same and can be directly replaced, must still make new samples on their own equipment and actual substrates. The reason is that two adhesives with the same nominal softening point of 85 ℃ […]
Misconception 1: Increasing the amount of glue applied can make it stick Many operators find that the BOPP film surface cannot stick, and their first reaction is to add glue. In fact, increasing the adhesive amount from 40g/m ² to 80g/m ² does not increase the bonding strength by less than 20%, but instead causes […]
The flowability of hot melt adhesive particles has an impact on the quality of glue and adhesive. Hot melt adhesive has poor fluidity and can also cause stretching problems or mismatch with mechanical efficiency. 1. Sol temperature; Hot melt adhesive is very sensitive to temperature, and changes in temperature can alter the structure of the […]
