Most Comprehensive Introduction POF shrink film | shrink wrap factory
POF is the abbreviation of polyolefin shrink film. POF is called multilayer co-extruded polyolefin heat shrinkable film. It uses linear low density polyethylene as the middle layer (LLDPE) and copolymerized polypropylene (pp) as the inner and outer layers. It is plasticized and extruded by five extruders, and then processed by special processes such as die forming and film bubble inflation. This product adopts the special technology of advanced two-way stretching three-layer and five-layer melt co-extrusion. Produce a soft shrink film with high transparency, high shrinkage rate, high toughness, high heat sealing performance, antistatic, excellent cold resistance, safe and reliable.
Product description
POF is a POF heat shrinkable film, mainly used for packaging regular and irregular shaped products, due to its non-toxic environmental protection, high transparency, high shrinkage rate, good heat sealing performance, high gloss, toughness, tear resistance, Uniform heat shrinkage and suitable for automatic high-speed packaging. It is a replacement product of traditional PVC heat shrinkable film. It is widely used in automotive supplies, plastic products, stationery, books, electronics, circuit boards, MP3, VCD, handicrafts, photo frames and other wood products. , Toys, pesticides, daily necessities, food, cosmetics, canned beverages, dairy products, medicine, cassettes and video tapes and other products.
Features
High transparency and good gloss, which can clearly display the appearance of the product, improve sensory awareness, and reflect high-grade.
The shrinkage rate is large, up to 75%, and the flexibility is good. It can pack any shape of goods, and the shrinkage force of the three-layer co-extrusion film treated by special technology is controllable, which meets the shrinkage force requirements of different commodity packaging. Require.
Good sealing performance and high strength, suitable for manual, semi-automatic and high-speed automatic packaging.
It has good cold resistance and can maintain flexibility at -50°C without brittle cracks. It is suitable for storage and transportation of packaged objects in cold environments.
Environmentally friendly and non-toxic, in line with US FDA and USDA standards, and can be packaged for food.
Main raw material
The main raw materials of the five-layer co-extruded heat-shrinkable packaging film include LLDPE (linear low-density polyethylene), TPP (terpolymerized polypropylene), PPC (binary copolymerized polypropylene) and necessary functional additives such as slip agent, Antiblocking agent, antistatic agent, etc. These raw materials are environmentally friendly and non-toxic materials, no toxic gas and odor will be produced during the processing and product application process, and the hygienic performance of the product meets the standards of the US FDA and USDA, and can be used for packaging food.
Production Process
The five-layer co-extruded heat-shrinkable packaging film is made of linear low-density polyethylene (LLDPE) and copolymerized polypropylene (TPP, PPC) as the main raw materials, adding necessary additives, and processed by co-extrusion blow molding process. Different from the traditional blow molding process, due to the poor tensile properties of the PP melt state, the traditional blow molding process cannot be used, but the double-bubble process, also known as the Pulandi process in the world, is the process of extruding raw materials through different extrusion processes. Extruded by melt extrusion, through a specially designed co-extrusion die, the first film is formed and then quenched, and then heated and stretched for the second time to obtain the product.
Main performance
Product specification
Five-layer co-extruded heat-shrinkable film can be produced in various specifications according to the purpose, and the general thickness range is 12 μ m～30 μ m. Common thickness is 12 μ m、15 μ m、19 μ m、25 μ M, the width specification depends on the volume of the package.
Cold resistance
Five-layer co-extruded heat-shrinkable packaging film shall remain soft and free from embrittlement at - 50 ℃, and is suitable for the storage and transportation of packaged goods in cold environment.
Hygienic performance
The raw materials used for the five-layer co-extrusion heat-shrinkable packaging film are all environment-friendly and non-toxic materials. The processing and use process are sanitary and non-toxic, and comply with the national FDA and USDA standards, which can be used for food packaging.
Application field
It is widely used in the outer packaging and collective packaging of products in various industries such as food, cosmetics, gifts, medicines, stationery, toys, audio-visual products, electronics, wood products, plastic hardware, daily necessities, etc. This product is suitable for semi-automatic or fully automatic shrink packaging machines.
Application prospects
POF heat-shrinkable packaging film has a wide range of uses, a broad market, and has the advantages of environmental protection and non-toxicity. Therefore, it has been widely valued by developed countries in the world, and has basically replaced PVC heat-shrinkable packaging film as the mainstream product in heat-shrinkable packaging materials. The production of this series of products in my country began in the mid-1990s. There are more than ten production lines in China, all of which are imported equipment, with a total production capacity of about 20,000 tons. Due to the gap between my country's packaging technology and international developed countries, the domestic application of three-layer co-extruded heat shrinkable packaging film is still in the initial stage, and the scope of application is still relatively narrow, limited to beverages, audio-visual products, convenience foods and a small amount of daily chemical products. In a few fields, the annual demand is about 250,000 to 30,000 tons. PVC heat shrinkable film also occupies a considerable heat shrinkable packaging market, with great development potential. With my country's accession to the WTO and its integration with the international market, the gradual increase in packaging requirements for a large number of export commodities, and the rapid development of domestic supermarkets, the application of three-layer co-extruded heat shrinkable packaging films will increase rapidly. It is foreseeable that three-layer The market prospect of co-extrusion series heat shrinkable film is very broad.
Zhejiang Zhongcheng Packing Material Co., Ltd is a professional shrink film manufacturer and supplier, committed to the production of high-quality overall packaging such as POF shrink film, heat shrinkable film,high speed packaging film,high performance film, pvc shrink film, polyolefin shrink film,hot slip shrink film,low slip shrink film etc.