The heat sealing tape is heated by special equipment (hot air seam sealing machine or high frequency heat sealing machine), stitched at the knitting bone pinholes of waterproof and airproof series products such as raincoats, tents, and air balloons to achieve sealing (water leakage prevention , Anti-leakage) effect of a tape.
It is well known that pinholes will appear in the production of garments, and of course the waterproof series is no exception. How to ensure that these needles do not leak water, this seemingly simple problem has also puzzled us for thousands of years, because ordinary tape does not have a strong force when it encounters water.
In the 20th century, only a few countries in the world used it, and the materials were very expensive. It appeared only in countries with more developed military industries, such as the United States and the Soviet Union, and it was only used in aerospace technology. It is technically confidential to other countries.