The packaging of children’s food should put the safety and purity of the product in the first place. Traditional children’s food packaging is glass and metal, which has good barrier properties and can prevent contamination of foreign impurities. Vacuum packaging in the container can store food for a long time.
Ready-to-eat children’s food
This is a dry product, add water when eating, it does not need to be frozen, so the main packaging requirement is that there should be no water infiltration during the product distribution process. The first flexible packaging bag appeared in the United Kingdom in the 1960s, followed by spiral wound composite tin cans, used to package dry grains, such as: ionic resin/AL foil/LDPE/paper to make composite can packaging. Heat seal layer/aluminum foil/PET/paper can also be used. Children’s dehydrated fruits, vegetables, and meat packaging were generally used in the United Kingdom in the 1980s in composite cans. The inner layer is paper/LDPE/aluminum foil/ionic resin, the center layer is cardboard, which provides rigidity; the outer layer is Paper label. The top and bottom are aluminum foil, and the PE cover can be opened and closed again. This tin can can be produced on the same filling line as the metal can, with a shelf life of two years.
Liquid and semi-solid food for children
Fruit juice is the first non-ready-to-eat children’s food to use plastic packaging. This is a juice with a relatively high acid content. The plastic bottle of ketchup sauce has expanded the scope of application. A successful packaging example with a long pot life, generally 15 Shelf life of months. For ketchup sauce, the 113g thermoformed container of PP/recycled PP/adhesive resin/EVOH/adhesive resin/PP structure has replaced about 1/4 of the glass container. For standard button covers used on glass containers, it can also be used on composite tank containers. The juice products are filled in cans, and the plastic containers are sterilized in the process, and the cooling liquid is used to create a vacuum, and the tank space is flushed with water vapor. The use of PP/adhesive resin/PVDC adhesive resin/PP structure also has a shelf life of ten months. In Europe, tetrahedral aseptic packaging cartons are more common.
Dry toy food
Dry toy food needs to have grease-resistant packaging and good cleanliness. Boxes are the most widely used form of toy food packaging. Paper bags or paper bags coated with PE or PP on the inner layer and coated with printed protective varnish are widely used Vanu food packaging. For semi-moisture foods with moisture content below 35%, metal tin cans are traditionally packaged. In order to save weight and cost, spiral wound tins with a soft structure can also be used: paper/LDPE/aluminum foil/ionic resin. The printing surface uses top coat varnish or conforms to a layer of OPP film. Ionic resin or acid copolymer as the sealing layer can have strong sealing and fat resistance. Another kind of structure is: paper / adhesive resin / metalized OPP / heat seal layer.
Adhesive resin is used to bond paper and metallized OPP. LDPE or an acid copolymer can be used, which can be selected according to the requirements of adhesion. Here, the metalized OPP has good barrier properties, crack resistance, and pinhole resistance.