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High temperature resistant hot melt adhesive for books and magazines is mainly based on polyamide resin, so high temperature resistant hot melt adhesive is also known as polyamide hot melt adhesive. Polyamide resin is a linear thermoplastic resin with a large number of repeated amide groups on the molecular main chain. Compared with other thermoplastic resins, a significant feature of it is that the melting and solidification of the resin occur within a narrow temperature range during heating and cooling. What are the main components of high-temperature resistant hot glue for books and periodicals?
This feature enables polyamide hot melt adhesive to quickly solidify after heating, melting, and coating during the construction process. It also gives it good adhesive properties at temperatures close to the softening point.
Due to the presence of hydrogen on the amide group of polyamide resin, it can form strong hydrogen bonds with the electron donating carbonyl group of another amide group, thereby increasing the melting point of the resin and thus having good flexibility. The oil resistance and adhesion performance increase with the increase of resin molecular weight. Compared with ethylene vinyl acetate copolymer hot melt adhesive, polyamide hot melt adhesive has a higher softening point and therefore has better heat resistance.
The molecular weight of polyamide resin used as a hot melt adhesive matrix for high-temperature resistant books and periodicals is usually in the range of 1000-9000. The polyamide resin used as a hot melt adhesive matrix is mainly composed of dimers of unsaturated fatty acids (such as linoleic acid, soybean oleic acid, elemonic acid, etc.) and diamines (such as ethylenediamine, propylene diamine, hexamethylene diamine). Amine formation. Obtained through condensation.
When synthesizing polyamide resin, different diamines are used to obtain resins with different molecular weights and softening points. The method of mixing ethylenediamine and hexamethylenediamine is commonly used.
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 […]
When rushing to print images and text, problems such as glue cracking, falling pages, or unstable adhesion may not necessarily be just a problem with the glue. It can be checked item by item from the aspects of equipment temperature, glue amount, paper status, production rhythm, etc., and confirmed by sampling based on actual equipment and materials.
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EVA hot melt adhesive is cheap and widely used in the industrial industry – but which commercial products are commonly made with hot melt adhesive? The following are the six most common applications in the manufacturing industry: 1） Quick assembly, recyclable cardboard box The transportation packaging industry is a major user of EVA hot melt […]
