Overview of Plastic Packaging Containers and Boxes
DATE：2019/12/17 8:51:33 / READ： / SOURCE：This station
Section 1 Overview of Plastic Packaging Containers and Boxes
Plastic packaging containers refer to containers of bottles, cans, and barrels. The production process can be extrusion blow, injection blow, and extrusion pull blow and injection stretch blow. Large containers can also be produced by rotary molding. The plastic packaging box can be a turnover box, a corrugated box, and a container, which are used to transport the packaging or the turnover transportation of products between the factory and the workshop. The forming process is mainly
Injection (turnover box) and calendering method (corrugated carton
For plastics used in the production of various containers, LDPE accounts for 6.6% of the total resin output, HDPE accounts for 41.1% of the resin output (including 16.9% for injection molded containers and 24.2% for hollow molded containers), and PP containers account for 17.7% of PP resin Among them, hollow molded containers accounted for 4.8%, and injection molded containers accounted for 12.9%). At present, hollow molded containers have been developed into composite bottles and composite multi-layer containers containing highly barrier resin. In addition to the above-mentioned general extrusion blow, injection blow, extrusion blow, and injection stretch blow molding methods for containers, a process of heating and pressing co-extruded composite sheets into a variety of containers in a mold has been developed. This process is simple and convenient The produced container has good mechanical strength, barrier properties and high production efficiency.
In the development of new packaging materials, mainly: First, develop convenient packaging containers, for example, develop composite film cans, and second, develop packaging containers that have sufficient and reliable protection for the contents and extend the pot life, especially Multi-layered packaging containers with high barrier materials; Third, develop beautiful and luxurious packaging containers that are easy to carry for exhibitions;
Fourth, develop packaging containers that are easy to handle and easy to recycle. In particular, the material containing aluminum foil in the multilayer composite container is a big problem to solve the problem of layered recycling. In the development of high-barrier containers, containers produced mainly from blends or co-extruded composites of three types of high-barrier materials, such as EVAL, PVDC, and PAN, have also recently been developed and produced.
Amorphous nylon (Selar PA) and PET.
In the development of heat-resistant packaging containers, the plastic packaging container can not only meet the requirements of retort sterilization at 120 ° C for 30 minutes, but also can be used for heating and sterilization in electronic wave furnaces and resistance furnaces. Microwave oven uses 500 ～ 600w power, such as heating foods without oil, can be heated to 100C in 3 ～ 10min, such as heating cooking oil, etc., it can reach 80 ～ 90C after 2min, 130 ～ 140 ℃ after 3min, and after 5min It can reach a high temperature of 165 ～ 180 ℃, and the fat content of this kind of packaging
The sterilization of food needs to be resistant to deformation, breakage and migration of the contents under high temperature. Composite containers using crystalline PET, poly 4-methyl-1-pentene, polysulfone, benzoin carboxylic acid, bisphenol A, phthalate copolymers, and unsaturated polyesters as precursors have been put on the market.
Water-absorptive containers and packaging are another new trend in container development. During the preservation of fresh animal foods such as sashimi and shredded pork, the water contained in the food will leach out, thereby promoting food degradation. In order to prevent the composition of foods from being damaged while absorbing moisture in the foods, a packaging container has been developed. This is mainly caused by the introduction of hydrophobic groups into water-soluble polymer materials. After irradiation, cross-linking, etc., water-absorbing polymers that are insoluble in water and can absorb a large amount of water are mainly starch polymers (starch-propylene graft polymerization Polymers, starch acrylic grafts, etc.), cellulose polymers (cellulose acrylic grafts, crosslinked methyl cellulose, etc.), polyvinyl alcohol polymers (crosslinked polyvinyl alcohol, acrylic groups, etc.) Saponified vinyl acid, etc.), acrylic polymer (crosslinked polyacrylate, etc.). In addition, recently opened
Plastic packaging containers refer to containers of bottles, cans, and barrels. The production process can be extrusion blow, injection blow, and extrusion pull blow and injection stretch blow. Large containers can also be produced by rotary molding. The plastic packaging box can be a turnover box, a corrugated box, and a container, which are used to transport the packaging or the turnover transportation of products between the factory and the workshop. The forming process is mainly
Injection (turnover box) and calendering method (corrugated carton
For plastics used in the production of various containers, LDPE accounts for 6.6% of the total resin output, HDPE accounts for 41.1% of the resin output (including 16.9% for injection molded containers and 24.2% for hollow molded containers), and PP containers account for 17.7% of PP resin Among them, hollow molded containers accounted for 4.8%, and injection molded containers accounted for 12.9%). At present, hollow molded containers have been developed into composite bottles and composite multi-layer containers containing highly barrier resin. In addition to the above-mentioned general extrusion blow, injection blow, extrusion blow, and injection stretch blow molding methods for containers, a process of heating and pressing co-extruded composite sheets into a variety of containers in a mold has been developed. This process is simple and convenient The produced container has good mechanical strength, barrier properties and high production efficiency.
In the development of new packaging materials, mainly: First, develop convenient packaging containers, for example, develop composite film cans, and second, develop packaging containers that have sufficient and reliable protection for the contents and extend the pot life, especially Multi-layered packaging containers with high barrier materials; Third, develop beautiful and luxurious packaging containers that are easy to carry for exhibitions;
Fourth, develop packaging containers that are easy to handle and easy to recycle. In particular, the material containing aluminum foil in the multilayer composite container is a big problem to solve the problem of layered recycling. In the development of high-barrier containers, containers produced mainly from blends or co-extruded composites of three types of high-barrier materials, such as EVAL, PVDC, and PAN, have also recently been developed and produced.
Amorphous nylon (Selar PA) and PET.
In the development of heat-resistant packaging containers, the plastic packaging container can not only meet the requirements of retort sterilization at 120 ° C for 30 minutes, but also can be used for heating and sterilization in electronic wave furnaces and resistance furnaces. Microwave oven uses 500 ～ 600w power, such as heating foods without oil, can be heated to 100C in 3 ～ 10min, such as heating cooking oil, etc., it can reach 80 ～ 90C after 2min, 130 ～ 140 ℃ after 3min, and after 5min It can reach a high temperature of 165 ～ 180 ℃, and the fat content of this kind of packaging
The sterilization of food needs to be resistant to deformation, breakage and migration of the contents under high temperature. Composite containers using crystalline PET, poly 4-methyl-1-pentene, polysulfone, benzoin carboxylic acid, bisphenol A, phthalate copolymers, and unsaturated polyesters as precursors have been put on the market.
Water-absorptive containers and packaging are another new trend in container development. During the preservation of fresh animal foods such as sashimi and shredded pork, the water contained in the food will leach out, thereby promoting food degradation. In order to prevent the composition of foods from being damaged while absorbing moisture in the foods, a packaging container has been developed. This is mainly caused by the introduction of hydrophobic groups into water-soluble polymer materials. After irradiation, cross-linking, etc., water-absorbing polymers that are insoluble in water and can absorb a large amount of water are mainly starch polymers (starch-propylene graft polymerization Polymers, starch acrylic grafts, etc.), cellulose polymers (cellulose acrylic grafts, crosslinked methyl cellulose, etc.), polyvinyl alcohol polymers (crosslinked polyvinyl alcohol, acrylic groups, etc.) Saponified vinyl acid, etc.), acrylic polymer (crosslinked polyacrylate, etc.). In addition, recently opened
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