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What’s Easy Pealable Film?
Sep 03, 2018

The easy pealable film packaging is an important member of the easy-open packaging family. It consists of a bowl-shaped container of relatively large thickness and hardness, and a layer of soft, easily tearable lid.


  The earliest appearance of the easy-to-tear film was the instant noodle bowl packaging, and then the packaging of tofu, yoghurt, jelly, pudding, etc. also appeared to be easy to tear the cover film.


  Easy to tear film has several requirements: First: higher barrier properties. Because tofu, yoghurt, jelly, pudding, etc. are some foods that are very easy to spoil and deteriorate, and most of these foods are kept at room temperature. Some shelf life requirements are relatively long, usually from 3 months to half a year, so The barrier properties of the easy-to-tear film material are very important. Generally, the tear film is a relatively high composite structure.


  Second, moderate heat sealability. The easy-to-tear film should be firmly sealed during production, storage, transportation, sales and carrying, and it is not easy to be damaged, but it should be easily torn when it is activated. Because foods such as jelly, yoghurt, and biscuits are mainly consumed by children. It must be sealed firmly and easily torn. This is a difficult point for tearing the film.


  Third, the sealing should have good anti-pollution and low-temperature heat sealing. Because the easy-to-tear film is in the process of packaging, the seal is often contaminated by fillers such as powder and liquid. At the same time, with the advancement of technology, the packaging speed is constantly increasing.


  Fourth, the film should have good shrinkage. Because the easy-to-tear film is a combination of the film and the cup body, the packaged content will shrink after a certain volume after cooling. If the film shrinks correspondingly, the package will be full, smooth, smooth and good.


  Fifth, in the packaging of foods such as yogurt, the film also has a special requirement, which is easy to perforate, to facilitate the customary use.


In addition, in many cases, it is required that the tear-off film is not completely torn apart, and only half is torn. This requires that the tear-open cover film can be erected rather than bounced back to cover. The plastic cover film has a strong rebound force. In order not to rebound, aluminum-plastic composite cover film is required in many occasions.


   The earliest easy-to-tear film is a composite structure of aluminum foil and hot melt adhesive. Because the materials used in the production of aluminum foil are high quality aluminum with a purity of more than 99%. This high-purity, high-quality aluminum consumes a lot of energy in the production process and is expensive. Therefore, the surface material of the current easy-to-tear film is mostly nylon, polyester or paper; the intermediate barrier layer is vacuum-aluminized, and the silicon is coated with silicon oxide or aluminum oxide. But this film has a drawback, that is, it is opaque.


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