The use and material characteristics of PVC1

PVC is a vinyl polymer material, and its material is an amorphous material. In practical use, PVC materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance agents and other additives. It has non-flammability, high strength, weather resistance and excellent geometric stability. PVC is very resistant to oxidizing agents, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid and is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons. In addition, the term person vs computer in the game is abbreviated as PVC, and PVC human figures are often abbreviated as PVC. PVC can be divided into hard PVC and soft PVC. Among them, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for the surface of floors, ceilings and leather, but because soft PVC contains softeners (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use is limited. Hard PVC does not contain softeners, so it has good flexibility, easy to form, not easy to be brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value. Hereinafter referred to as PVC. Soft PVC is mostly used to make vacuum plastic film for surface packaging of various panels, so it is also called decorative film and adhesive film, which is used in many industries such as building materials, packaging, and medicine. Among them, the building materials industry accounts for the largest proportion, accounting for 60%, followed by the packaging industry, and several other small-scale application industries. Features: excellent mechanical properties, excellent electrical properties, strong acid and alkali resistance, good chemical stability, but low softening point. Suitable for making thin plates, wire and cable insulation layers, seals, etc. Forming characteristics: 1. Amorphous material, low moisture absorption, poor fluidity. In order to improve fluidity and prevent bubbles, the plastic can be pre-dried. The casting system of the mold should be thick and short, the gate section should be large, and there should be no dead corners. The mold must be cooled and the surface is chrome-plated; 2. Due to its corrosive and fluid characteristics, it is best to use special equipment and molds. 2. All products must be added with different types and quantities of auxiliaries as required; 3. It is very easy to decompose, and it is easier to decompose when it is in contact with steel and copper at a temperature of 200 degrees. When decomposed, corrosion, irritating gas, and forming temperature range are escaped; 3. When using a screw type injection machine nozzle, the aperture should be large to prevent dead corners from stagnant. PVC (Polyvinyl Chloride) is a flame retardant, chemically stable material that only produces low tensile cracking force. At the same time, its material properties also include high strength, high stiffness and high hardness, the working temperature range is from minus 15 degrees to 60 degrees, and it can be bonded and welded. The main characteristics of PVC: strong corrosion resistance: the most suitable for anti-corrosion equipment in the chemical industry. Easy processing: cutting, welding and bending are all very simple. High strength, high stiffness and high hardness; good electrical insulation; good chemical stability; self-extinguishing; low water absorption; easy to bond and paint. Inexpensive. PVC application fields: acid test manufacturing tower, seawater concentration tank, photo processing equipment, electroplating tank, battery box, electric meter board, audio base cover, radio bottom plate, various electrical insulation boards, cement tank lining, machine windshield , Exhaust duct engineering, stationery, building materials, etc.