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Hot melt adhesive is a non-toxic, odorless, and environmentally friendly plastic adhesive that changes with temperature. Hot melt adhesive can produce multiple colors. The prices of hot melt adhesive in the market are also uneven. So how to distinguish the quality of hot melt adhesive?
1. The color requirements for book hot melt adhesive also vary
If there is no color requirement for the adhesive book, it is recommended to use light yellow particle hot melt adhesive. Generally speaking, yellow hot melt adhesive has better adhesion than other colors of hot melt adhesive.
2. Working hours of hot melt adhesive
Fast operation is a characteristic of EVA hot melt adhesive, and the running time of EVA hot melt adhesive is generally around 15 seconds.
The production mode is widely applied to assembly lines, and the running time of hot melt adhesive will become shorter and shorter, such as cardboard packaging, pearl cotton bonding, etc. The running time of hot melt adhesive is about 5 seconds
III. Temperature Resistance of Hot Melt Adhesive
EVA hot melt adhesive is temperature sensitive. When the temperature is heated to a certain degree, the hot melt adhesive begins to soften. When the temperature is below a certain level, the hot melt adhesive will become brittle. Therefore, when choosing hot melt adhesive, it is necessary to consider the temperature changes in the product environment.
Fourth, Surface Treatment of Hot Melt Adhesive
The surface treatment of hot melt adhesive is not as strict as other adhesives, but the dust on the surface of the adhesive should also be cleaned in a timely manner, so that EVA hot melt adhesive can have a better bonding effect.
Fifth, the viscosity of book hot melt adhesive is divided into early viscosity and late viscosity
Hot melt adhesive can only be stable when its early viscosity is consistent with its later viscosity. Hot melt adhesive should ensure its antioxidant, halogen resistant, acid-base, and plasticizing properties during the production process. The viscosity of hot melt adhesive depends on the material to be connected. Therefore, different hot melt adhesives should be selected according to the products made of different materials.
Sixth, the principle and advantages of hot melt adhesive bonding
Why does hot glue stick to objects? That’s because hot melt is a polymer, taking our common hot melt adhesive as an example. Eva Hot melt adhesive is a polymer of vinyl acetate.
When applied to the back of a book, hot melt adhesive will penetrate and complete the bonding process during use, which is the principle of thermosetting.
7. Advantages of Hot Melt Adhesive for Books
How to use book hot melt adhesive correctly? Books are our spiritual pillar! The books we read every day have become a necessity in our daily life system. It establishes ideas, regulates behavior, comforts the spirit, and expresses emotions. In terms of book design, the overall design of the book is crucial. The choice of […]
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 […]
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: 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. […]
The aging of hot melt adhesive is mainly manifested in two aspects: appearance and performance. Visually, the color of hot melt adhesive may become dull, and even yellow or brown tones may appear. The texture may become hard and brittle, losing its original flexibility, and the surface may have cracks or fissures. In terms of […]
