Let me tell you about the Chinese name of PVC: polyvinyl chloride, product name: PVC plastic, polyvinyl chloride plastic, English name and translation: polyvinyl chloride, yellowish translucent, shiny, PVC is an amorphous polymer, no Significant melting point, plasticity when heated to 120～150℃.
PVC is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. PVC is a kind of plastic. It is made of polyvinyl chloride resin as the main raw material, adding appropriate anti-aging agents, modifiers, etc., through mixing, calendering, and vacuum blister technology.
The transparency of PVC is better than polyethylene and polypropylene, and worse than polystyrene. It is divided into soft and hard polyvinyl chloride according to the amount of additives. Soft products are flexible and tough, and feel sticky. The hardness of hard products is higher than that of low density. Polyethylene, which is lower than polypropylene, will show a whitening appearance at the inflection.
PVC products are resistant to chemical stability and have strong resistance to oxidants, reducing agents and strong acids. However, concentrated sulfuric acid and concentrated nitric acid can be corroded by corrosive acids, and are not suitable for occasions where they are in contact with aromatic hydrocarbons and chlorinated hydrocarbons.
PVC has the advantages of flame-retardant, self-extinguishing, wear-resistant, sound-absorbing, high strength, good electrical insulation, low cost, wide data, and good air tightness.
The shortcomings of PVC are poor thermal stability, and the effects of light, heat, and oxygen are simply aging. The long-term application temperature of most PVC plastic products should not exceed 55°C, while the long-term application temperature of PVC in special formulations can reach 90°C. Usually people think that PVC is toxic. In fact, PVC resin itself is non-toxic. If non-toxic plasticizers, stabilizers and other auxiliary materials are used, they are harmless to humans and livestock, but the practice is very small. Most of the plasticizers and stabilizers in the PVC products used on the market are toxic, so except for injection All products with non-toxic formula can not be used to contain food.
The advantages of PVC in self-adhesive label printing are non-flammability, high strength, good climate change and good stability. It has strong resistance to oxidants, reducing agents and strong acids. On the other hand, due to its excellent flexibility, shortening and light transmission, excellent processing and marking functions, strong chemical resistance, and strong durability, Suitable for long-term outdoor use. However, PVC has poor thermal stability and light resistance. It can begin to differentiate and release hydrogen chloride (HCl) gas at a temperature above 140°C, which is not conducive to environmental protection (in practice, alkaline stabilizers and HCl are often used in production to suppress its catalytic cracking response. ). In addition, some toxic auxiliary materials such as plasticizers and anti-aging agents are added in the production process to enhance its heat resistance, resistance, ductility, etc., so its products usually do not store food and medicine. In addition, the degradability of PVC label materials is poor, which has a negative impact on environmental protection.
PVC labels are usually used for sticker printing. PVC has excellent inking function and can be made into various colors. PVC has a wide range of uses in self-adhesive label printing. It is suitable for labels with high functional requirements such as water resistance, oil and chemical products. Because of its flexibility and other properties, it is commonly used in toilet products, cosmetics, electrical products, and jewelry and jewelry. , Wall clocks, electronics, metal industry and other fields have a wide range of application prospects. In addition, PVC shortened film adhesive labels are suitable for special labels for battery labels.
PVC self-adhesive labels are made of high-quality surface materials, glued with water glue and oil glue, and will not overflow glue. Imported die-cutting and slitting are adopted. The finished product is die-cut smoothly, and the paper is smooth and does not jam, the color is stable, and the font printing is clear. The label is waterproof, oil-proof, unbreakable, and high temperature resistant. The fabrics are transparent, bright milky white, matt milky white, resistant to water, oil and chemical products and other important product labels. They are used for toilet articles, cosmetics, and electrical products, and are especially suitable for information labels for high-end new products.