Use of EVA film
DATE：2019/8/3 8:53:47 / READ： / SOURCE：This station
Use of EVA film
EVA has excellent properties such as flexibility, adhesion, toughness (especially impact resistance), heat sealability, cold resistance, optical properties (gloss, transparency, etc.), and stress crack resistance. With its characteristics, it is widely used in heavy packaging, flexible packaging, liquid packaging, body packaging, stretch packaging and container bags.
(1) Heavy-duty bags Because of its toughness, heat-sealing properties, and cold resistance, EVA is used as a heavy packaging material in foreign countries. EVA for heavy packaging has a VA content of 5% (mass fraction) and its performance is similar to that of LDPE, so there is competition between them. The toughness, heat sealing and cold resistance of EVA are better than LDPE. The domestic EVA resin is expensive and therefore not used in heavy packaging.
(2) Flexible packaging Soft packaging is also called flexible packaging. It is a packaging material for EVA film combined with other films (such as polypropylene, polyester, nylon, etc.), cellophane, and aluminum foil, and is mainly used for food packaging. It is carried out by dry compounding and extrusion compounding coextrusion compounding. Since the VA content of such a resin is generally 10% (mass fraction) or less, the toughness, heat sealability, and durability of environmental stress cracking of EVA are fully utilized. Due to the rapid development of food packaging, the requirements for the performance of packaging materials are higher, especially for packaging materials with excellent toughness and heat sealing properties.
(3) Liquid packaging It also utilizes the characteristics of EVA's toughness, heat sealability and environmental stress cracking resistance. It is used for liquid packaging of edible oil, vinegar, wine, medicine, detergent, etc., and uses EVA composite film. The form of the package is in the form of an inner bag that is repackaged in a box or kraft paper. EVA for such applications generally has a VA content of less than 10% (mass fraction).
(4) Skin packaging The EVA is flexible, optical, and adhesive, and can be used for body packaging. The high-pressure corona discharge treatment of the EVA diaphragm improves the adhesion of the treated surface to the cardboard. Excellent adhesion even if the adhesive is not applied to the cardboard. Mainly used for packaging Japanese sundries, but also popular packaging machinery parts, tools, electrical parts and so on. EVA used in this aspect has a VA content of more than 10% (mass fraction).
EVA has excellent properties such as flexibility, adhesion, toughness (especially impact resistance), heat sealability, cold resistance, optical properties (gloss, transparency, etc.), and stress crack resistance. With its characteristics, it is widely used in heavy packaging, flexible packaging, liquid packaging, body packaging, stretch packaging and container bags.
(1) Heavy-duty bags Because of its toughness, heat-sealing properties, and cold resistance, EVA is used as a heavy packaging material in foreign countries. EVA for heavy packaging has a VA content of 5% (mass fraction) and its performance is similar to that of LDPE, so there is competition between them. The toughness, heat sealing and cold resistance of EVA are better than LDPE. The domestic EVA resin is expensive and therefore not used in heavy packaging.
(2) Flexible packaging Soft packaging is also called flexible packaging. It is a packaging material for EVA film combined with other films (such as polypropylene, polyester, nylon, etc.), cellophane, and aluminum foil, and is mainly used for food packaging. It is carried out by dry compounding and extrusion compounding coextrusion compounding. Since the VA content of such a resin is generally 10% (mass fraction) or less, the toughness, heat sealability, and durability of environmental stress cracking of EVA are fully utilized. Due to the rapid development of food packaging, the requirements for the performance of packaging materials are higher, especially for packaging materials with excellent toughness and heat sealing properties.
(3) Liquid packaging It also utilizes the characteristics of EVA's toughness, heat sealability and environmental stress cracking resistance. It is used for liquid packaging of edible oil, vinegar, wine, medicine, detergent, etc., and uses EVA composite film. The form of the package is in the form of an inner bag that is repackaged in a box or kraft paper. EVA for such applications generally has a VA content of less than 10% (mass fraction).
(4) Skin packaging The EVA is flexible, optical, and adhesive, and can be used for body packaging. The high-pressure corona discharge treatment of the EVA diaphragm improves the adhesion of the treated surface to the cardboard. Excellent adhesion even if the adhesive is not applied to the cardboard. Mainly used for packaging Japanese sundries, but also popular packaging machinery parts, tools, electrical parts and so on. EVA used in this aspect has a VA content of more than 10% (mass fraction).
Author：admin