PVC mainly consists of polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness, and ductility. The top layer of this surface film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is a back-coated adhesive. PVC and PE belong to olefins. PVC is polyvinyl chloride and is the strongest of the three major olefins. PE is polyethylene, which is divided into low-density polyethylene, high-density polyethylene, and linear low-density polyethylene.
Two types of pipes that are often used in large-scale waterworks construction are PVC and PE pipes, while PPR pipes are mainly used in home decoration. With the development of the economy in recent years, the demand for PVC hose pipes and PE pipes has significantly increased. Do you know when to use PVC hose pipe or PE pipe? What are the differences between PVC flexible hose pipe and PE pipes?
PE is polyethylene, which is divided into high-density, low-density, and linear PE. The most commonly used in daily life are various plastic films and plastic sheets. PVC is polyvinyl chloride, which is a plastic product made up of 43% oil and 57% salt.
Differences between PVC flexible hose pipes and PE pipes:
Material properties: The average molar mass of PE pipes is between 10,000 and one million, and they are in a particle form with good flexibility, lighter than water, strong corrosion resistance, and non-toxic. The average molar mass of PVC hose pipes is between 150,000 and 120,000, and they are in a powder form with high mechanical strength, low heat resistance, strong acid and alkali resistance, and good chemical stability, with decomposition at 140℃;
Heat resistance: The heat resistance of PVC hose pipe is greater than that of PE pipes. Cold resistance: PVC hose pipe;
The softening point of PE pipes is 122~135℃, the ignition point is 340℃, and the resistance is high, making it an excellent insulation material, with stable chemical resistance and guaranteed quality control. PVC hose pipes have poor cold tolerance, are prone to brittle fractures at low temperatures, require additives during production, and are difficult to control;
The tensile strength of PE pipes is 25 to 40, and the thermal deformation is 60 to 85℃; the tensile strength of PVC hose pipes is 15 to 25, and the thermal deformation is 75 to 80℃.
In terms of shoes, PVC leather is mostly used for lining or non-weight-bearing parts, or for making children's shoes; PU leather can be used for shoe surfaces or weight-bearing parts. In terms of bags, PVC leather is more commonly used because the items in the bags do not emit heat like feet in shoes and do not need to bear personal weight.
The difference between PU and PVC is relatively easy to see. From the edge, the bottom cloth of PU is much thicker than that of PVC hose pipes, and the hand feels different, with PU feeling softer; PVC feels harder. You can also burn them with fire. The odor of PU is much lighter than that of PVC.
