Prospects of POF heat shrinkable film

Heat shrinkable film is a kind of thermoplastic film that is stretched and oriented during the production process, and shrinks by heat during use. The heat shrinkage of the film has been applied as early as 1936. At first, rubber film was mainly used to shrink packaging perishable food. Nowadays, heat shrink technology has been developed to almost use plastic shrink film to package various commodities. In addition, shrink packaging is also used to make shrink labels and shrink bottle caps, so that containers that are not easy to print or have complex shapes can be labeled. Recently, newer application areas have been developed continuously. Production technology and characteristics: The production of heat shrinkable film usually adopts extrusion blow molding or extrusion casting method to produce thick film, and then longitudinal and transverse stretch at a high elastic temperature above the softening temperature and below the melting temperature. Or it is only stretched in one direction and not stretched in the other direction. The former is called biaxially stretched shrink film, while the latter is called unidirectional shrink film. When in use, when the temperature is higher than the stretching temperature or close to the stretching temperature, the packaged goods can be wrapped with reliable contraction force. Shrink packaging has the following advantages: (1) Beautiful appearance, close to the product, so it is also called skin packaging, suitable for various shapes of product packaging; (2) Good protection, if the inner packaging of the shrink packaging is hung on the outer packaging The transportation and packaging of the above can be combined to have better protection; (3) Good cleanliness, especially suitable for packaging of precision instruments and high-precision electronic components; (4) Good economy; (5) Good anti-theft , A variety of foods can be packed together in a large shrink film to avoid loss; (6) Good stability, the product will not sway in the packaging film; (7) Good transparency, customers can directly see the content of the product. Market development and typical applications The materials used for heat shrinkable films are mainly various thermoplastic films. At first, PVC shrink film was mainly used. With the continuous development of market demand, PVC shrink film gradually decreased, and various PE, PP, POF and other multilayer co-extruded heat shrink films developed rapidly and became the mainstream of the market. The market is expanding further. Experts predict that the domestic heat shrinkable film market will grow at a rate of more than 20%. The food industry is the largest market for shrink packaging. Heat shrinkable film is widely used in the packaging of various fast foods, lactic acid foods, beverages, snacks, beer cans, various alcohols, agricultural and sideline products, dry foods, and souvenirs. Applications in non-food fields are also increasing, such as labels and bottle caps, seals, fibers and clothing, aerosol products, sporting goods, electrical products, cosmetics, pharmaceuticals, grease, detergents, stationery, toys, office supplies, kitchen supplies , Daily necessities, sundries, building materials, etc. At present, the application of heat shrinkable film in the domestic market mainly shows the following characteristics: (1) It has been widely used in fast food, ceramic products, tea sets, mechanical parts and other fields; (2) Heat shrinkable in military machinery and hardware tools The combination of film and vapor phase anti-rust technology replaces the method of anti-rust oil and enhances the anti-rust ability, which is of great significance; (3) Heat shrinkable film is also the protector of construction and transportation materials. It is not only suitable for packaging of multiple products and packaging with pallets, it is convenient for transportation and sales, easy to realize mechanization, saving labor and material resources, and can partially replace carton and wooden box packaging; (4) Used for various PET bottled beer , Beverage label, can reduce the process of removing the label, easy to recycle; (5) Used for bottled beer instead of strapping packaging to prevent bottled beer from exploding and hurting people. Customers who choose heat shrinkable film usually first consider the specific selection mode from the cost. Shrink packaging and laminated film can usually achieve the same packaging effect. So how to decide which packaging film to choose? Generally speaking, the main difference lies in the requirements for packaging patterns, the frequency of packaging, the requirements for shelf life, and the physical properties of the packaging itself such as liquid, powder, granular, solid, square, and so on. The following criteria will help customers to choose suitable packaging materials: the scale of the food factory; whether the target is an industrial system or the retail industry; adjustment requirements; shelf life requirements; anti-abuse requirements; product shape; whether it is used for preservation, freezing or other No other environmental requirements; the consistency of the packaging production company and customer culture. Previous: Comparison of the performance of various materials of heat shrinkable film Next: Polyethylene PE molding method and testing standards