Ultrasonic Backpack Welding
Ultrasonic Backpack Welding The materials of the climbing bags are mainly divided into four types: polyester, nylon, Cordura and canvas. Polyester (polyester fiber): It has good strength, strong heat resistance and good elasticity. It is a good fabric. However, the dyeing property should be poor. If you have high requirements for color, it may be difficult to choose this type. Nylon (nylon, polyamide fiber): light in weight, not easy to [...]