The ultrasonic cord shearing machine for fireproof webbing adopts plc console, which can automatically feed materials, track and scan with electronic eyes more accurately, count by computer, have high precision, high speed, and adjust the length simply, quickly and efficiently. This equipment is widely used in packaging, gifts, clothing and other industries, and its unparalleled cutting effect is favored by our customers. Climbing ropes are divided into main ropes and auxiliary ropes. The main rope is 60-100 meters long and about 10 mm in diameter, and the weight per meter is required to be 0. 08 kg or so, and the tensile strength is not less than 1,800 kg. In the past, jute was mostly made, but recently nylon fiber has been used as raw material. There is also a main rope with a diameter of 8-9 mm and a weight of 0 per meter. 06 kg, the tensile strength is not less than 1,600 kg, used to climb steep rock walls. The waist elastic band has good low-temperature flexibility and excellent stretch resilience, which can be kept consistent for a long time. Breathable elastic band, also called elastic thread and rubber thread, can be used as the bottom line of clothing accessories, especially suitable for underwear, pants, baby clothes, sweaters, sportswear, rhymes, wedding dresses, T- shirts, hats, busts, masks and other clothing products.
First, spandex
Polyurethane fiber, scientific name, melts and burns near the fire. When burning, the flame is blue. When leaving the fire, it continues to melt and burn, emitting a special pungent smell. The ash after burning is soft and fluffy black ash.
Second, nylon and polyester
Polyamide nanofiber, the scientific name of nylon, is quickly curled and melted into white to form a gel when it is near the flame, and it is melted, dripped and foamed in the flame. There is no flame when it is burned, so it is difficult to continue burning without this flame, emitting different celery flavors, and it is not easy to be ground by light brown melt after cooling.
Polyester fiber, the scientific name of polyester, is easy to ignite, and the near flame is melting and shrinking. When burning, it melts black smoke, yellow flame and fragrance, and the burnt ash is dark brown lumps, which can be broken by fingers.
(3). Acrylic acid and polypropylene (PP)
Polyacrylonitrile fiber melts, contracts and softens when it is close to the fire. After the fire, it emits black smoke, and the flame is white. After the flame, it burns rapidly, emitting a sour taste of burning meat. The burning ash is irregular black lumps, which are easily twisted by hand.
Polypropylene fiber, the scientific name of which is polypropylene fiber, melts near the flame and is flammable. It burns slowly away from the fire source and emits black smoke. The upper end of the flame is yellow and the lower end is blue, giving off the smell of oil. After burning, the ashes are hard round yellow-brown particles, which are fragile when twisted by hand.
Post time: May-30-2023