stretch film Knowledge

Knowledge of the stretch film

Application of stretch film packaging technology stretch film is a kind of thermoplastic plastic film that is 

stretched and oriented in the process of production, while being heated and contracted in the process of use. The heat shrinkability of stretch film has been used since 1936, and it was originally mainly used to shrink the packaging of perishable foods. Nowadays, thermal shrinkage technology has developed to the point where plastic stretch film can be used to package almost anything

Application of stretch film packaging technology

Stretch film is a kind of thermoplastic film that is stretched and oriented in the production process, while it is heat-shrinkable in the use process. The heat shrinkability of stretch film has been used since 1936, and it was originally mainly used to shrink the packaging of perishable foods. Nowadays, thermo - shrinkage technology has developed to the point where you can almost use plastic shrink - stretch film to package all kinds of goods. In addition, shrink packaging is used to make shrink labels and shrink bottle caps so that containers that are difficult to print or have complex shapes can be labeled. Recently, new application fields have been developed.

The advantages of stretch film packaging

The appearance is beautiful, close to the goods, so it is also called paste packaging, suitable for different shapes of goods packaging;

Good protection. If the inner package of shrink package is combined with the transport package hanging on the outer package, it can have better protection.

Good cleaning quality, especially suitable for precision instruments, high precision electronic components packaging;Good economy;Good anti - theft, a variety of food can be packaged together with a large shrink film to avoid loss;

Good stability, the goods in the packaging film will not tilt;

Good transparency, customers can see the content of goods directly.

Technology and characteristics of thermal shrinkage film production

Stretch film production usually adopt extrusion blow molding or extrusion LiuYanFa produce thick film, and then above the softening temperature, melt temperature, a high elastic state under longitudinal and transverse stretching temperature, stretching or only in one of the directions orientation, and the other one direction not stretching, the former is called biaxial tensile shrinkage film, while the latter is called a one-way

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