The use of polythene film has grown steadily over time. According to data compiled by SPI, only 8,690 million pounds of plastic were used to manufacture film in 1990; by 1994, that number had increased nearly 20 percent, to 10,375 million pounds. A brief discussion of some of the benefits of using plastic film, all of which have contributed to its recent growth in packaging applications, follows.
Maybe the biggest and most looked benefit of plastic film is its ability to substantially reduce the amount of material needed to make a product or package. How does it do that? Plastic film has a high strength to weight ratio, which means that manufacturers can use less material when creating a new product or package. For example, in rigid packaging, a 500ml soft drink container can be made with only 30 grams of plastic whereas the same size container would require 200 grams of glass. That means that a lot less packaging is needed to make a bottle, for exemple, when a produce uses plastic instead of glass.
Plastic film has an even higher strength to weight ratio than rigid plastic that said, manufacturers need even less material to make a package. For example, a plastic film bag used to deliver concentrated fabric softener is 85% lower in weight and volume than a comparable plastic bottle, but it delivers the same quantity of softener. The benefits from material minimization that plastic film gives are one of the reasons it is a popular choice for packaging. In addition, if a package requires less material on the front end, it also creates less waste on the back end, which also makes plastic film desirable to manufacturers.
Another benefit of plastic film is that it can fulfill all of the necessary functions of a package, including containing and protecting a product as well as providing convenience and information to the consumer.
Another benefit of plastic film is that it is versatile. It can be used alone, in conjunction with other types of plastic or even used in conjunction with other materials, such as paper and aluminum. This versatility allows manufacturers to create packages that can perform very specific functions. Following are some examples of such packages.
Low Density Polythene Film - (LDPE)
This polythene grade is known for being a general-purpose product. The majority of Polybags stock products such as the Lay Flat tubing are made using LDPE polymers. Polybags can manufacture any film or bag shape using this type of polythene, tailor made for your requirement.
Shrink Polythene Film
Shrink polythene can best be described as heat reactive polythene which when shrunk forms a tight protective barrier around a given object. For example a pallet cover gives protection against the elements, whilst securely holding it�s contents during transportation. Shrink polythene is used in both manual and automated applications, with either a heat shrink gun or a shrink tunnel, both of which Polybags Ltd can also supply.
Linear Low Density Polythene Film - (LLDPE)
Similar to Low Density, Linear Low Density polythene offers greater range in its performance characteristics, particularly its superior strength properties. Polybags has over 40 years experience manufacturing this type of polythene.