Requirements: high strength, low moisture content, low air permeability, no corrosion, and certain water resistance
Paper used for food packaging also requires hygiene, sterility, and no contaminating impurities.
Packaging paper includes kraft paper, chicken skin paper, paper bag paper, parchment paper, cellophane, tar paper, moisture-proof paper, gunpowder wrapping paper, neutral wrapping paper, translucent paper, rust-proof paper, greaseproof paper, food wrapping paper, paraffin paper, Tea bag paper, red electric light gun paper, vacuum aluminized paper, etc.
Paper used for packaging various commodities. Generally, it has high physical strength and certain water resistance. According to the characteristics of the product, the wrapping paper has corresponding special properties. Among the wrapping paper, the most used is the paper bag paper for packaging bulk powder and granular industrial and agricultural raw materials, such as cement, chemical fertilizer, etc., which are generally made of more than 3 to 4 layers of paper. Therefore, it is also called multi-layer paper bag paper to distinguish it from other bag paper for packaging light and fine goods. This type of wrapping paper mainly requires high strength, heavy load resistance, impact resistance, and proper air permeability. Food packaging paper has the most varieties and specifications. It is divided into two categories: inner packaging and outer packaging. The inner wrapping paper that is in direct contact with food is mainly required to be clean, free of germs, and has the characteristics of moisture-proof, oil-proof, stick-proof and mildew-proof.
The outer packaging paper is mainly used to beautify and protect the goods. In addition to a certain physical strength, it also needs to be clean and beautiful, and is suitable for printing multi-color commodity patterns and texts. The wrapping paper for liquid beverages such as milk and vegetable juice must also have excellent impermeability. In order to meet the needs of long-term preservation and preservation, special beverage soft packaging paper (see food packaging containers) has been developed in recent years, which is composite of paper and metal film, paper and plastic and metal film. In order to meet the anti-rust needs of metal instruments and tools, anti-rust paper was developed. The vast majority of cardboard is also used for commodity packaging, mainly used in the manufacture of cartons, cartons and packaging liners.
A generic term for a class of paper used for packaging purposes. It can be divided into ordinary wrapping paper, special wrapping paper, trademark paper, oil-proof wrapping paper and moisture-proof wrapping paper. Usually has high strength and toughness. Various types of wrapping paper have different properties and uses. For example, special fruit wrappers are thin and soft. Photosensitive protective paper is opaque. Oil-proof wrapping paper (vegetable parchment, etc.) has anti-grease permeation properties. Moisture-proof wrapping paper (asphalt paper, oil paper, aluminum foil paper, etc.) is moisture-proof. The trademark paper is used for packaging after printing. Ordinary wrapping paper is mostly used for general commodity packaging, and the quality requirements are not strict.
