Surface material requirements for PVC self-adhesive labels

PVC is a polymer material that uses one chlorine atom to replace one hydrogen atom in polyethylene. PVC is a kind of plastic. It is a material made of polyvinyl chloride resin as the main raw material, adding appropriate anti-aging agents, modifiers, etc., through mixing, calendering, vacuum forming and other technologies.

The transparency of PVC is better than that of polyethylene and polypropylene, but worse than that of polystyrene. It is divided into soft and hard polyvinyl chloride according to the dosage of additives. Soft products are flexible and flexible, and feel sticky. The hardness of hard products is higher than that of low density. Polyethylene, and lower than polypropylene, will show a white appearance at the inflection.

PVC products are resistant to chemical stability and have strong resistance to oxidants, reducing agents and strong acids, but concentrated sulfuric acid, concentrated nitric acid, etc. can be corroded by corrosive acids, and are not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons.

PVC has the advantages of flame retardant, self-extinguishing, wear resistance, noise reduction, high strength, good electrical insulation, low cost, wide data, and good air tightness.

The disadvantage of PVC is poor thermal stability, and the effect of light, heat and oxygen is easy to age. 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, it is harmless to humans and livestock, but the practice is very small. Most of the plasticizers and stabilizers used in PVC products on the market are toxic. Except for products with non-toxic formula, they cannot be used for food.

The advantages of PVC in self-adhesive label printing are non-flammable, high strength, climate change and good stability. It has strong resistance to oxidizing agents, 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, it is Suitable for long-term outdoor use. However, the thermal stability and light resistance of PVC are poor, and it can start to decompose and release hydrogen chloride (HCl) gas at above 140 ° C, which is not conducive to environmental protection (alkaline stabilizers and HCl are often added in practical production to suppress its catalytic cracking reaction. ). Moreover, some toxic auxiliary materials such as plasticizers and anti-aging agents are added in the production process to enhance its heat resistance, tolerance, ductility, etc., so its products are usually not stored in 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 is widely used in self-adhesive label printing, suitable for labels with high functional requirements such as water resistance, oil and chemical resistance, and because of its flexibility and other properties, it is commonly used in toilet products, cosmetics, electrical products and jewelry, jewelry. , wall clock, electronic industry, 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.

The PVC self-adhesive label is made of high-quality surface material, plus water glue and oil glue, which will not overflow glue. It adopts imported die-cutting and slitting, and the finished product is die-cutting smoothly. The label is waterproof, oil-proof, tear-proof and heat-resistant. The fabric has transparent, bright milky white, matt milky white, water-resistant, oil-resistant and chemical-resistant product labels with more important properties. It is used for toilet supplies, cosmetics, electrical products, and is especially suitable for information labels of new products.