As we all know, polyethylene has a wide range of applications, which can be used for the production of plastic film by up-blowing or casting. It can be used for injection molding or blow molding to produce hard plastic products, and can be used for wire and cable. In this article, we highlight the main film applications for polyethylene.
The composite film is generally composed of a composite substrate (BOPA, BOPP, BOPET)-adhesive-PE (heat seal). The composite substrate provides stiffness, strength, optical properties, printability, barrier properties, and the like, depending on the particular requirements. The PE heat seal structure mainly provides heat sealing performance, plus additional toughness and stiffness. Composite membranes are used in a wide range of applications, such as most frozen or non-frozen food packaging, non-food packaging such as laundry detergents and cosmetics.
2. Heat shrinkable film
As the name suggests, the heat shrinkable film refers to a film that shrinks automatically when exposed to heat, and is mainly used for beverage packaging, such as mineral water, carbonated drinks, and the like. The main performance requirements of the film are: lateral shrinkage and shrinkage speed, tensile strength, puncture resistance, and drop resistance. Sometimes it is necessary to add HDPE to increase stiffness and tightness. The addition of LLDPE or metallocene is for strength and heat sealing.
Stretch-wrapped film, also known as “wrap film”, is made by linear polyethylene LLDPE resin and tackifier special additives in a certain proportion of formula. Wound stretch film is a very popular packaging form in the world. High, high elasticity, can be wrapped for any geometric shape, and can avoid the damage caused by the strapping. It has good anti-loose, rainproof, dustproof, anti-theft effects, etc. It is widely used in the collection and packaging of articles. And tray packaging for containers (cans), chemicals, ceramics, glass, hardware machinery and equipment, steel, paper, textiles, furniture, food industry (beverage packaging), electronic product boxes and other industries.