Easy-open film is mainly used for the packaging of snacks and other casual foods, and is a functional packaging material that has been developed in response to the need for ease of use. According to people's traditional concept, the requirement for packaging is to be as strong as possible, and it is considered that the stronger the packaging is, the better the protection effect of the goods, and thus it is more desirable. However, with the development of society, especially in recent years, due to the arrival of the aging society, objectively appeared to facilitate the opening of the strong demand, the previous one-sided emphasis on packaging on the protection of goods, at the expense of the concept of openness has been a great impact, at the same time, a new thinking: the requirements of the packaging, especially the packaging of convenience foods and other commodities, not only to be able to protect the contents of its packaging, but also to facilitate the opening of the function, so the packaging, and so on. With the function of easy to open, so the development and application of easy-to-open functional packaging film - easy to open film came into being.



1.Classification of easy-open film

Has been industrialised easy-open sealing film has easy to peel and easy to tear two categories.

(1) Easy-open film easy to peel type



Easy to peel type easy open film is easy to open the film in the application of more varieties, used for plastic cups, bowls and other packaging containers, the use of cover material. The basic principle of the production of easy-to-peel easy-open film is through a specific formula, so that the film heat sealing after the peeling strength of the moderate decline, in order to achieve both effective protection of the packaged goods, but also with the convenience of opening the original intention; easy-to-peel easy-open film generally use a multi-layer composite structure, at least two layers of the main layer and heat sealing layer. The role of the main layer is to give the film higher mechanical properties, such as high rigidity, high tensile strength and tear strength, while the main layer of easy-to-peel easy-open film has a high melting point, so that the main layer and the heat-sealable film have a high melting point.
At the same time, through the main layer of the easy-to-peel easy-to-open seal film has a high melting point, so that the main layer and the heat sealing layer has a large melting temperature difference, thus improving the film's heat sealing processing performance. The heat sealing layer, also known as the adhesive layer, its function is mainly to give the film sealing reliability and the film's easy to peel, it is obvious that the easy-to-peel easy-to-open sealing film heat sealing layer material selection, for easy-to-open sealing film performance is crucial. In order to obtain high-quality easy-to-peel easy-open sealing film, the heat sealing layer of the material is often used in special adhesives or special formulations; product requirements are not high, the heat sealing layer of the material can also be used in specific grades of general-purpose resin formulations. www.susumino.com薄膜生产线



(2) Easy-tear easy-open film



Easy-tear easy-open film is used to manufacture easy-to-tear plastic packaging bags. Tearable E-open films are rarely used today and are not well documented in the literature. The ideal tear-open film requires not only a low tear strength, but also a relatively good linear split when the film is torn, i.e., when the film bag is opened, the split expands in the desired direction in a straight line to prevent irregular breakage of the bag, which can lead to loss of contents. In the preparation of tear-prone easy-open films, in addition to a specific formulation (or a specific grade of resin), appropriate processing (moderate stretching) is often required to produce a specific orientation of the macromolecules in the film. Tearable film can be either a single-layer structure or a multilayer composite film made by laminating a single tearable film with a biaxially oriented film.



2. Application of easy-open films

Easy-open film is mainly used for after-dinner snacks, jelly and other leisure foods at the beginning, with the arrival of the age of aging and the improvement of people's living standards, the application surface is rapidly expanding, as yoghurt, jelly, jam, milk, pudding, cold beverages, cup noodles, lactone tofu, waves of food, bottled medicines and other plastic containers with easy-open film for the cover material; and the container material is mainly polypropylene (PP), high-density polyethylene (HDPE), polyethylene (HDPE), polymer, polymer, polymer, polymer, polymer and polymer. HDPE), polyvinyl chloride (PVC), high impact strength polystyrene (HIPS), polystyrene (PS), copolyester (PETG), amorphous polyester (APET).




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