Differences and uses of PU, PE, EVA, PVC and Nylon hoses

1. PVC can be divided into soft PVC and hard PVC. Soft PVC is easy to become brittle and not easy to preserve. Hard PVC does not contain softener, so it is flexible, easy to form, not fragile, non-toxic and pollution-free, and has a long storage time. 2. PU pipe has excellent high pressure resistance, vibration resistance, corrosion resistance, wear resistance, weather resistance, zigzag resistance and portability; 3. PE pipe is not as mechanical as steel pipe. Pay special attention to the safety distance of thermal heating during construction, and cannot be exposed to the air and sunlight, and is sensitive to chemicals, so as to prevent the leakage of sewage pipe from causing damage; 4. EVA is vinyl acetate copolymer; 5. Nylon is conductive and flame retardant. PU is a new organic polymer material, known as the "fifth largest plastic", and widely used in many fields of the national economy because of its excellent performance. The product application fields include light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation, etc. PE medium and high pressure polyethylene: more than half of it is used for film products, followed by pipes, injection molding products, wire wrapping, etc; Medium and low pressure polyethylene: mainly injection molding products and hollow products. Ultra-high pressure polyethylene: due to its excellent comprehensive properties, it can be used as engineering plastics. PVC can be used for PVC profiles, PVC pipes and PVC films; Polyamide is mainly used for synthetic fibers. Its most prominent advantage is that its abrasion resistance is 10 times higher than that of cotton and 20 times higher than that of wool. Adding some polyamide fibers into the blended fabric can greatly improve its abrasion resistance; When stretching to 3-6%, the elastic recovery rate can reach 100%; It can withstand thousands of times of bending without breaking.

How to distinguish PU hose from PVC hose?

PU pipes are soft and hard. So burn it. It's PVC hose that emits black smoke. It is PU hose that can be lit without black smoke and drips. The PVC hose will not continue to burn after leaving the fire. PU hose is very soft, while PVC hose is relatively hard. Check whether the surface is smooth and flat, and whether there are blisters, bulges, sponges, trachoma, etc; 2、 Bend by hand to see if there are cracks; 3、 Check whether the steel wire reinforcement layer is arranged regularly; 4、 Check the cross section, whether the inner hole and steel wire layer are round and straight, and whether the thickness of the inner and outer rubber layers is uniform; 5、 Cut the inner and outer glue with a nail or knife to see if they are firm; 6、 Use your nose to smell whether the smell of internal and external glue is pungent. 1. The pitch is flexible. 2. It has good scalability, without blocking and rigidity. 3. Light weight, good caliber consistency. 4. Good flexibility, repeated bending and flexibility. 5. Good corrosion resistance and high temperature resistance. 6. It is resistant to rat bite and abrasion, and prevents internal wires from being worn. 7. Strong bending resistance, tensile property and lateral pressure resistance. 8. Soft and smooth, easy to thread, install and locate.