Glass container classification Glass bottles are divide […]
Glass container classification
Glass bottles are divided into two types: fine bottles and jars. The vial is mainly used for packaging wine, beverages and seasonings. The caps are mostly crown caps, screw caps and twisted screw caps. The jar is mainly used for packaging baby food, all kinds of canned foods, solid beverages, etc. Most of the bottle caps are screw-open caps, pressure-sealing caps, bite caps, side caps, and roll caps. According to the weight-to-volume ratio of empty bottles, glass bottles can be divided into ordinary bottles and lightweight bottles. In order to prevent breakage, glass bottles (especially lightweight bottles) usually require chemical strengthening or plastic strengthening during the manufacturing process.
The cap material mainly includes tin plate, chrome plate, aluminum plate, plastic, and the like. Caps made of sheet metal are usually coated with exterior coatings and printed trademarks, and the inner surface is sealed with a corresponding internal coating. At present, most of the cap liners are made of polyvinyl chloride plastic mats, which gradually replace the early cork, cardboard, aluminum foil, rubber ring and so on. Plastic liners are typically made from polyvinyl chloride resins, plasticizers, stabilizers, and lubricants, blowing agents, pigments, and the like. The inner wall coating of the PVC liner is used to firmly bond the liner to the inner surface of the lid without falling off. The formulation is mainly composed of vinyl resin and acrylic resin.