The hottest heat shrinkable packaging technology a

2022-10-12
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Heat shrinkable packaging technology and new application of heat shrinkable packaging

the heat shrinkability of film was applied as early as 1936. At first, rubber film was mainly used to shrink and package perishable food. Nowadays, heat shrinkable technology has been developed to almost use plastic shrinkable film to package all kinds of goods. 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, more and more new application fields have been developed

the heat shrinkability of film was applied as early as 1936. At first, rubber film was mainly used to shrink and package perishable food. Nowadays, heat shrinkable technology has been developed to almost use plastic shrinkable film to package all kinds of goods. 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, more and more new application fields have been developed

production technology and characteristics shrink film is called impact energy production. Usually, thick film is produced by extrusion blow molding or extrusion casting, and then stretched longitudinally and transversely at a high elastic temperature above the softening temperature and below the melting temperature, or stretched and oriented only in one direction, while not stretched in the other direction. The former is called biaxial stretch shrink film, and the latter is called unidirectional shrink film. When in use, when it is greater than or close to the tensile temperature, the packed goods can be wrapped by reliable shrinkage force

shrink packaging has the following advantages:

1) it is beautiful in appearance and close to goods, so it is also called body fitted packaging, which is suitable for various shapes of commodity packaging

2) good protection. If the inner packaging of shrink packaging is combined with the transportation packaging suspended on the outer packaging, it can have better protection

3) good cleanliness, especially suitable for the packaging of precision instruments and sophisticated electronic components

4) good economy

5) it has good theft resistance. A variety of foods can be packed together with a large shrink film to avoid loss

6) good stability, and the goods will not stagger in the packaging film

7) good transparency, customers can directly see the product content

market development and typical applications the materials used for heat shrinkable films are mainly various thermoplastic films. At first, PVC shrinkable films were mainly used. With the continuous development of market demand, PVC shrinkable films gradually decreased, while various PE, PP, pet, PVDC, POF and other multi-layer coextrusion heat shrinkable films developed rapidly and became the mainstream of the market. At present, the plastic packaging Committee of China Packaging Federation alone has nearly 20 domestic shrink film manufacturers, with an output of nearly 80000 tons. Experts predict that the domestic heat shrinkable film market will grow by more than 20% in the next five years. The food industry is the largest market for heat shrinkable packaging. Heat shrinkable films are widely used in the packaging of all kinds of fast food, lactic acid food, beverages, snacks, beer cans, all kinds of alcohol, agricultural and sideline products, dry food, China's export products are mainly small and medium-sized products with low technical content and low added value, such as medical consumables, massage appliances, conventional equipment, etc

it is also increasingly used in non food fields, such as labels and bottle caps, seals, fibers and clothing, aerosol products, sporting goods, electrical products, cosmetics, pharmaceuticals, oils, 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) in military machinery and hardware tools, it is of great significance to apply the method of combining heat shrinkable film and vapor phase rust prevention technology to replace rust prevention oil and enhance the rust prevention ability

3) heat shrinkable film is also the protector of construction and transportation materials. It is not only suitable for the packaging of multiple products and the packaging with pallets, but also convenient for transportation and sales. It is easy to realize. It can be well mechanized, save labor and material tension, and can partially replace the packaging of cartons and wooden boxes

4) used for labels of various PET bottled beer and beverages, which can reduce the process of removing labels and facilitate recycling

5) it is used for bottled beer instead of strapping to prevent bottled beer from exploding and injuring people

selection of heat shrinkable film

customers usually first consider the specific selection mode from the cost. Heat shrinkable packaging and laminating film can usually achieve the same packaging effect, so how to decide which kind of packaging film to choose? In general, the main differences lie in the requirements for packaging patterns, the frequency of packaging, the requirements for shelf life, and the physical characteristics of the packaging itself, such as liquid, powder, granular, solid, square and so on

the following guidelines help readers choose suitable packaging materials:

the size of the food factory

whether the service object is industrial system or retail industry

adjustment requirements

shelf life requirements

anti abuse requirements

product shape

whether it is used for preservation, freezing or other environmental requirements

consistency between packaging production company and customer culture

general retail industry requires that according to the needs of consumers, more attention should be paid to the attractiveness of printing effect to consumers and the convenience of packaging

industrial packaging is different. It pays more attention to the uniqueness of products and whether it is convenient for mass processing. In general, the choice of heat shrinkable packaging should consider the attractiveness of packaging to consumers and good sealing safety. There are many corresponding technologies about the market and application of heat shrinkable film. Looking at the development of domestic and foreign markets, low-temperature heat shrinkable technology, low-cost technology, multi-purpose adaptability, packaging technology and high reliability technology have become the general trend of heat shrinkable packaging research. With the continuous promotion of various new technologies, the application field of heat shrinkable packaging is becoming wider and wider

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