Shrink film is a thermoplastic film that is stretch oriented during production and shrinks during use. The heat shrinkability of the film was applied as early as 1936. Initially, rubber films were used to shrink the packaging of perishable foods.
Nowadays, heat shrink technology has been developed to almost all kinds of goods packed with plastic shrink film. In addition, shrink packaging is also used to make shrink labels and shrink caps so that containers that are not easily printed or have a complex shape can be labeled. Recently, new and updated application areas have been developed.
Production techniques and characteristics Shrink film production usually uses extrusion blow molding or extrusion casting methods to produce thick films, then longitudinal and transverse stretching at a high elastic temperature above the softening temperature and below the melting temperature, or only In one of these orientations, the orientation is stretched and not stretched in the other direction. The former is called a biaxial stretch shrink film, and the latter is called a unidirectional shrink film. In use, a reliable shrinkage force wraps the packaged product at or near the stretching temperature.
Shrink wrap has the following advantages:
1) beautiful appearance, close to the goods, it is also called body packaging, suitable for a variety of different shapes of the product packaging;
2) Good protection, if you combine the shrink-wrapped inner package with the transport package hanging on the outer package, you can have better protection;
3) Good cleaning, especially suitable for precision instruments, high-precision electronic components packaging;
4) Good economy;
5) Good burglary resistance. A variety of foods can be packed together with a large shrink film to avoid loss.
6) The stability is good, and the goods will not fall in the packaging film;
7) Transparency is good, customers can directly see the content of the product.
Market Development and Typical Applications The materials used for heat shrinkable films are mainly thermoplastic films. Initially, PVC shrink film was the main product. With the continuous development of market demand, PVC shrink film gradually decreased, and various kinds of PE, PP, PET, PVDC, POF and other multi-layer co-extrusion heat shrinkable films developed rapidly and became mainstream in the market. At present, the domestic shrink film manufacturers only China Packaging Federation Plastic Packaging Committee has nearly 20, production is close to 80,000 tons. According to experts' forecasts, the domestic heat shrinkable film market will grow at a rate of more than 20% in the next five years.
The food industry is the largest market for shrink packaging. Heat-shrinkable films are widely used in packaging of various fast foods, lactic acid foods, beverages, snack foods, beer cans, various kinds of alcoholic beverages, agricultural and sideline products, dry foods, and local specialties.
Applications in the non-food sector are also increasing, such as labels and caps, closures, fibers and clothing, aerosol products, sporting goods, electrical products, cosmetics, pharmaceuticals, grease, detergents, stationery, toys, office supplies, kitchen supplies , daily necessities, sundries, construction materials, etc.
At present, the application of heat shrinkable film in the domestic market mainly shows the following features:
1) Widely used in fast food, ceramic products, tea sets, machinery parts and other fields;
2) The use of heat-shrinkable membranes and vapor-phase rust-prevention techniques in military machinery and hardware tools as alternatives to rust-preventing oils to enhance rust-prevention capabilities is of great significance;
3) Heat shrink film is also a protective god of construction and transportation materials. It is not only suitable for multi-product packaging and packaging with trays, convenient for transportation, but also easy to sell, easy to implement mechanization, saving labor and material resources, and can partially replace cartons and wooden boxes;
4) It can be used in various PET bottled beer and beverage labels, which can reduce the process of label removal and facilitate recycling;
5) It is used for bottled beer instead of tying rope packaging to prevent bottled beer from blasting and hurting people.
Heat Shrink Film Selection Customers will usually consider the specific selection mode from the cost. Heat-shrinkable packaging and laminating films can usually achieve the same packaging effect. How do you decide which packaging film to use? In general, the main differences lie in the requirements for packaging patterns, the frequency of packaging required, the shelf life requirements, and the physical properties of the packaging itself such as liquids, powders, granules, solids, squares, and the like.
The following guidelines will help you choose the right packaging material:
The scale of the food factory;
The service object is industrial system or retail industry;
Adjustment requirements;
Shelf life requirements
Abuse prevention requirements;
The shape of the product;
Is it used for preservation, freezing, or other environmental requirements?
Packaging production company and customer culture consistency. The general retail industry is required to be oriented toward the needs of consumers, and more emphasis is placed on the appeal of printing effects to consumers and the convenience of packaging. Different for industrial packaging, more emphasis on the uniqueness of the product and whether it is convenient for mass processing.
In general, the choice of heat shrinkable packaging should consider the packaging's attractiveness to consumers and good sealing safety.
With regard to the heat shrinkable film market and heat shrinkable film applications, there are many corresponding technologies. Looking at the domestic and international market development, low-temperature heat shrinking technology, low-cost technology, multi-purpose adaptability, on-line packaging technology, and high reliability technology have become The trend of heat shrink packaging research. It is the constant promotion of various new technologies and the application of heat shrink packaging has become more and more widespread.
Nowadays, heat shrink technology has been developed to almost all kinds of goods packed with plastic shrink film. In addition, shrink packaging is also used to make shrink labels and shrink caps so that containers that are not easily printed or have a complex shape can be labeled. Recently, new and updated application areas have been developed.
Production techniques and characteristics Shrink film production usually uses extrusion blow molding or extrusion casting methods to produce thick films, then longitudinal and transverse stretching at a high elastic temperature above the softening temperature and below the melting temperature, or only In one of these orientations, the orientation is stretched and not stretched in the other direction. The former is called a biaxial stretch shrink film, and the latter is called a unidirectional shrink film. In use, a reliable shrinkage force wraps the packaged product at or near the stretching temperature.
Shrink wrap has the following advantages:
1) beautiful appearance, close to the goods, it is also called body packaging, suitable for a variety of different shapes of the product packaging;
2) Good protection, if you combine the shrink-wrapped inner package with the transport package hanging on the outer package, you can have better protection;
3) Good cleaning, especially suitable for precision instruments, high-precision electronic components packaging;
4) Good economy;
5) Good burglary resistance. A variety of foods can be packed together with a large shrink film to avoid loss.
6) The stability is good, and the goods will not fall in the packaging film;
7) Transparency is good, customers can directly see the content of the product.
Market Development and Typical Applications The materials used for heat shrinkable films are mainly thermoplastic films. Initially, PVC shrink film was the main product. With the continuous development of market demand, PVC shrink film gradually decreased, and various kinds of PE, PP, PET, PVDC, POF and other multi-layer co-extrusion heat shrinkable films developed rapidly and became mainstream in the market. At present, the domestic shrink film manufacturers only China Packaging Federation Plastic Packaging Committee has nearly 20, production is close to 80,000 tons. According to experts' forecasts, the domestic heat shrinkable film market will grow at a rate of more than 20% in the next five years.
The food industry is the largest market for shrink packaging. Heat-shrinkable films are widely used in packaging of various fast foods, lactic acid foods, beverages, snack foods, beer cans, various kinds of alcoholic beverages, agricultural and sideline products, dry foods, and local specialties.
Applications in the non-food sector are also increasing, such as labels and caps, closures, fibers and clothing, aerosol products, sporting goods, electrical products, cosmetics, pharmaceuticals, grease, detergents, stationery, toys, office supplies, kitchen supplies , daily necessities, sundries, construction materials, etc.
At present, the application of heat shrinkable film in the domestic market mainly shows the following features:
1) Widely used in fast food, ceramic products, tea sets, machinery parts and other fields;
2) The use of heat-shrinkable membranes and vapor-phase rust-prevention techniques in military machinery and hardware tools as alternatives to rust-preventing oils to enhance rust-prevention capabilities is of great significance;
3) Heat shrink film is also a protective god of construction and transportation materials. It is not only suitable for multi-product packaging and packaging with trays, convenient for transportation, but also easy to sell, easy to implement mechanization, saving labor and material resources, and can partially replace cartons and wooden boxes;
4) It can be used in various PET bottled beer and beverage labels, which can reduce the process of label removal and facilitate recycling;
5) It is used for bottled beer instead of tying rope packaging to prevent bottled beer from blasting and hurting people.
Heat Shrink Film Selection Customers will usually consider the specific selection mode from the cost. Heat-shrinkable packaging and laminating films can usually achieve the same packaging effect. How do you decide which packaging film to use? In general, the main differences lie in the requirements for packaging patterns, the frequency of packaging required, the shelf life requirements, and the physical properties of the packaging itself such as liquids, powders, granules, solids, squares, and the like.
The following guidelines will help you choose the right packaging material:
The scale of the food factory;
The service object is industrial system or retail industry;
Adjustment requirements;
Shelf life requirements
Abuse prevention requirements;
The shape of the product;
Is it used for preservation, freezing, or other environmental requirements?
Packaging production company and customer culture consistency. The general retail industry is required to be oriented toward the needs of consumers, and more emphasis is placed on the appeal of printing effects to consumers and the convenience of packaging. Different for industrial packaging, more emphasis on the uniqueness of the product and whether it is convenient for mass processing.
In general, the choice of heat shrinkable packaging should consider the packaging's attractiveness to consumers and good sealing safety.
With regard to the heat shrinkable film market and heat shrinkable film applications, there are many corresponding technologies. Looking at the domestic and international market development, low-temperature heat shrinking technology, low-cost technology, multi-purpose adaptability, on-line packaging technology, and high reliability technology have become The trend of heat shrink packaging research. It is the constant promotion of various new technologies and the application of heat shrink packaging has become more and more widespread.