Hot stamping (heat transfer) EVA, PES, PA, TPU hot melt adhesive powder grinding processing

Heat transfer (heat transfer) is a popular printing technology, often used in textiles, clothing, shoes and hats and other products. The principle is to transfer the print pattern to the substrate through hot melt adhesive powder and fix it at high temperatures. Hot melt adhesive powder is one of the important raw materials in this technology and is usually made of EVA, PES, PA and TPU. This paper will focus on the identification of these hot melt adhesive powders and their crushing processing methods.

First, EVA hot melt adhesive powder

EVA hot melt adhesive powder is usually a transparent particle with good viscosity and elasticity, which can be firmly combined with fabrics and other materials. When heat transfer printing, EVA hot melt adhesive powder needs to be melted at a temperature of 170°C-200°C. Its main characteristics are strong viscosity, fast curing, high transparency, good softness and so on.

The grinding processing of EVA hot melt rubber powder mainly adopts mechanical crushing method, such as impact crusher, shear crusher, etc., which can be broken into particles that meet the required size.

Second, PES hot melt adhesive powder

PES hot melt adhesive powder is a material with high viscosity and high elasticity, usually white or transparent particles, and its melting point is usually between 170°C and 200°C. PES hot melt adhesive powder has good heat resistance, solvent resistance and corrosion resistance, and can be firmly combined with various fabrics.

The crushing method of PES hot melt adhesive powder is similar to that of EVA hot melt adhesive powder, mainly using mechanical crushing method, such as shear crusher, impact crusher and so on. When crushing, it is necessary to pay attention to control the temperature to avoid the material from being broken due to high temperature melting.

Third, PA hot melt adhesive powder

PA hot melt adhesive powder is a material with polyamide as the main component, and its particles are usually white or yellow. PA hot melt rubber powder melting point between 190°C-220°C, with high viscosity, high elasticity and good wear resistance, can be widely used in textiles, leather and other industries.

The grinding method of PA hot melt adhesive powder is similar to that of EVA and PES hot melt adhesive powder, mainly using mechanical crushing method. When crushing, attention should be paid to controlling the temperature to prevent the material from being broken due to high temperature melting.

Fourth, TPU hot melt adhesive powder

TPU hot melt adhesive powder is a material with polyurethane as the main component, and its particles are usually white or yellow. TPU hot melt adhesive powder has a melting point between 160°C and 200°C, has good elasticity and flexibility, and can be closely combined with textiles and other materials.

The grinding processing method of TPU hot melt adhesive powder is similar to the previous several hot melt adhesive powder, mainly using mechanical crushing method, such as shear crusher, impact crusher and so on. Compared with other materials, the crushing difficulty of TPU hot melt adhesive powder is greater, and high-quality crushing equipment needs to be selected to ensure the crushing effect and product quality.