The essence of PVC is a vacuum blister film

PVC heat shrinkable film can be divided into soft PVC and hard 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 floors, ceilings and leather surfaces, 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. Rigid PVC does not contain softeners, so it has good flexibility, easy forming, not brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value. Below are referred to as PVC. The essence of PVC is a kind of vacuum blister film, which is used for the surface packaging of various panels, so it is also called decorative film and adhesive film, which is used in building materials, packaging, medicine and many other industries. Among them, the building materials industry accounts for the largest proportion at 60%, followed by the packaging industry, and there are several other small-scale applications. Common shrink films in daily life include POF, PE, and PVC; among them, its functions are classified into non-toxic, environmentally friendly, high transparency, large shrinkage, good sealing performance, high gloss, toughness, tearing, uniform heat shrinkage, etc.; Plastic packaging is a professional manufacturer specializing in the production of various shrink films, providing customers with quality products. POF heat shrinkable film is a general multi-layer co-extruded polyolefin heat shrinkable film. It uses linear low-density polyethylene (LLDPE) as the middle layer, co-polypropylene (PP) as the inner and outer layers, through three plastic extruders, and mold forming, film bubble inflation and other special treatments. Mainly used for regular and irregular shaped product packaging. Because of its non-toxicity, environmental protection, high transparency, large shrinkage, good sealing performance, high gloss, toughness, tearing, uniform heat shrinkage, it is traditional for high-speed automatic packaging A substitute for PVC heat shrinkable film, it is widely used in automotive supplies, plastic products, stationery, and books. PVC heat shrinkable film can be used for insulation packaging of electrical appliances and electronic components (such as the outer packaging of dry batteries); packaging of general items and packaging in contact with food. Using it as a packaging material can not only simplify the packaging process and reduce the packaging volume, but also because the shrinking transparent film tightly wraps the packaged item, it can clearly show the color and shape of the item, so pvc heat shrinkable film is widely used in commodity packaging on. Heat-shrinkable film entered the Chinese market from the beginning, and related production equipment was also introduced into the country during the same period. Now there are several domestic plastic machinery manufacturers that can manufacture double-bubble heat shrinkable film production equipment. For domestic heat shrinkable film manufacturers, most of their equipment is outsourced, and some high-end heat shrinkable film products (such as POF, PVDC, etc.) are produced. The equipment needs to be imported. However, after years of introduction, digestion and absorption, individual domestic heat shrinkable film manufacturers can also manufacture high-performance POF heat shrinkable film production equipment. Heat shrinkable films are divided into crosslinked heat shrinkable films and non-crosslinked heat shrinkable films. Cross-linked heat shrinkable film is a high value-added product. The network structure brought about by ionizing radiation treatment significantly increases the toughness of the film, so that it is not prone to delamination, unsealing, insufficient shrinkage, and insufficient shrinkage like ordinary heat shrinkable films. Quality problems such as surface damage. However, due to the complicated process of the cross-linked heat shrinkable film and the large investment in equipment, only a few countries including the United States, China and Japan can produce this product. Previous: Heat shrinkable film can be used for the transportation of a variety of products Next: Application of pvc heat shrinkable film in daily life