Why does Heat Shrinkable Tube appear white bubbles?

The wide application of Heat Shrinkable Tube in various industries has made the development of the Special Material Braided Sleeve industry increasingly prosperous. More and more people use Heat Shrinkable Tube in life. It can be seen that Heat Shrinkable Tube are favored by many consumers. As a Heat Shrinkable Tube factory, we should To improve the quality of Heat Shrinkable Tube, what are the causes of white bubbles in Heat Shrinkable Tube?

There are many reasons for the poor appearance of Heat Shrinkable Tube. There are many common reasons for the appearance that customers often return or rework. The appearance reasons will inevitably bring losses to the manufacturers. In terms of the quality of Special Material Braided Sleeve, we can consider wear resistance, elasticity, Judge whether it is a good product based on five aspects including fatigue resistance, tear strength and tensile strength, hardness and elongation stress. Which Heat Shrinkable Tube in life trouble the manufacturer and boss because of their appearance.
White bubbles appear in the product, but the inside is empty or white foam after dissection. The main reason is that there is air in the Special Material Braided Sleeve material. The pressure is released too quickly during the high-temperature and high-pressure vulcanization process, causing the air in the product to expand, or the vulcanization time is too long or too short, the molding temperature is too high, the number of exhausts is too many, The second reason is the lack of material. Some workers in the Heat Shrinkable Tube factory place the materials unevenly before pressing, and some Some are more and some are less, resulting in a shortage of materials in the processed products.
During the vulcanization process, the vulcanization temperature is too high and the machine tool pressure is too low, which can also lead to product defects. When the molding temperature is too high during processing, the vulcanization of the Heat Shrinkable Tube rubber will be accelerated. The flow performance of the Heat Shrinkable Tube rubber in the mold will be reduced, which will lead to the Heat Shrinkable Tube being too small in size and thick in thickness, resulting in defects.