When customizing food packaging bags, there are many types of papers to choose from, and there are four types that are often used: kraft paper, coated paper, white cardboard, and offset paper. Different types of paper have different toughness, smoothness and aesthetics. When customizing paper bags, food packaging manufacturers will choose according to the purpose of paper bags and the characteristics of different papers.
Kraft paper: Made of softwood sulphate, it is strong, usually yellowish brown, in addition to light brown, cream or white. The thickness is between 80g and 120g. Kraft paper has a high tensile force, such as single light, double light, stripes, no grain, and the like. It is mainly used for making packaging paper bags, envelope bags, portfolio bags, medical record bags, etc. for environmentally friendly portable paper bags, food take-away paper bags, chestnuts and other dried fruits for supermarkets.
White cardboard: A single or multiple layer combination made from bleached chemical pulp and fully sized. The white cardboard has a smooth surface and a firm texture. At present, the imported white cardboard has a large market share in the domestic market. White cardboard is mainly used to make high-end exquisite handbags, bags, gift boxes, business cards, etc.
Coated paper: The main raw materials are copper plate base paper and paint. The pigments, adhesives and auxiliary materials are made into coatings, coated on the surface of the paperboard by special equipment, dried and calendered, the surface is smooth and clean, the printing performance is good, the thickness is 70~250 grams, and it is mostly used for cigarette cases. Labels, cartons, etc.
Offset paper: The paper is white and smooth, but the whiteness, tightness and smoothness are lower than the coated paper. It is suitable for printing monochromatic or multi-color book covers, texts, inserts, pictorials, maps, posters, color labels and In recent years, it has also been used to make dried fruit packaging bags such as chestnuts that are not required.