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People have always been confused about the softening point and temperature resistance of hot melt adhesive. Some customers even asked what the melting point of hot melt adhesive is? Now Sunlife hot melt adhesive will answer from a professional perspective, with a detailed understanding of the differences in melting point, softening point, and temperature resistance.
Melting point: The melting point of a substance, which is the temperature at which a solid or liquid of a pure substance reaches equilibrium under a certain pressure. Due to the fact that hot melt adhesive is a mixed substance, it is incorrect to define hot melt adhesive based on its melting point. The melting point that most customers refer to is actually the softening point of hot melt adhesive.
Softening point: Softening point, the temperature at which a substance softens. Mainly refers to the temperature at which amorphous polymers begin to soften. It is not only related to the structure of the polymer, but also to its molecular weight. There are many measurement methods. Different measurement methods often result in inconsistent results. The softening point of hot melt adhesive is usually tested using the global method, with a softening point between 69-82 ℃.
Temperature resistance: It is an important technical indicator of hot melt adhesive. It refers to the temperature at which the adhesive properties of hot melt adhesive begin to change after it is firmly bonded. Ordinary EVA hot melt adhesive is suitable for ambient temperatures ranging from 0 to 35 ℃. Special models of hot melt adhesive can withstand high temperatures of 80 ℃, 120 ℃, 140 ℃, and 170 ℃. The low temperature resistance is generally -10 ℃, and some hot melt adhesives can reach -20~-30 ℃. Ordinary hot melt adhesive can meet the normal climate range.
Bookbinding is a problem that every reader needs to face, and hot melt adhesive is a widely used binding method nowadays. This method has more advantages and disadvantages compared to traditional staples and glue binding. Next, let’s explore in detail. Advantages Hot melt adhesive is a very strong glue, so bound books are very sturdy. […]
The packaging industry is rapidly changing with fluctuations in demand from various industries. However, nearly 80 years after the invention of the first adhesive product designed to address temperature and humidity challenges, a fact still exists – all types of industries rely on hot melt adhesives. At the time of its invention, this multifunctional adhesive […]
Conclusion: Conventionalhot melt adhesiveParticles are not classified as dangerous goods Conventional EVA and APAO based hot melt adhesive particles are not classified as dangerous goods. It is a solid particle at room temperature, free of organic solvents, with a flash point generally above 250 ℃. It is neither flammable nor explosive, and is not listed […]
The occurrence of wire drawing, back cracking, page dropping, or edge glue overflow in book and magazine binding lines may not necessarily be due to “insufficient glue”. The paper coating, glue temperature, glue amount, milling back quality, and finished product cooling time will all jointly affect the results. This article provides a feasible troubleshooting sequence […]
