Generally, it is produced by a table tennis bat blister sealing machine, and it is formed by single-sided or double-sided blister processing. The table tennis racket suction sealing machine adopts modern high-tech biotechnology and the latest scientific formula, and is developed by using the latest bio-ice rapid excitation molding technology. The principle is that when the substance in the pad comes into contact with an object with higher phase change than it (such as human body), it will gradually change from solid to liquid, which is an endothermic process. In this process, the temperature remains constant until it is completely converted into liquid, and the process of endothermic can last for several hours. The heat absorbed per kilogram of material is about 190000J, while the heat absorbed by 1 kilogram of water is about 4200J, the former is 45 times of the latter, so the heat absorption capacity of the table tennis racket sealing machine is huge.
That's blister processing. Generally, there are single-sided blister processing and double-sided blister processing.