The material used for cartons is cardboard (or micro-corrugated cardboard). Generally, paperboard has poor water resistance, moisture resistance and barrier properties, and its strength and formability are also limited. Therefore, cartons are mainly used for the packaging of solid contents with low airtightness requirements. At present, box-making materials have developed from a single material to a paper-based composite material. Cartons are made of cardboard, plastic and aluminum foil, which greatly improves the barrier and sealing process of cartons, and the application range of cartons continues to expand.
Product packaging has many requirements for cartons, and many factors will affect the choice of cartons, such as the characteristics of the contents, shape, storage and transportation requirements, protection requirements, production technology status, sales goals, display effects, etc. Generally speaking, the following points should be paid attention to when choosing a carton:
1. Granular and powdery contents require a certain degree of airtightness, so usually adhesive-sealed folding cartons or cardboard/plastic composite cartons can be used for heat sealing.
2. If the ordinary blocky content is easy to put in or take out from the end of the box, you can generally choose the plug-in type, that is, the carton of the plug-in type to be sealed and opened; if it is inconvenient to put in or take out from the end of the box, you should use the disc to fold carton. 3. For liquid materials with high barrier and sealing requirements, cardboard/plastic or cardboard/plastic/aluminum foil composite folding cartons are usually used, or cartons with liner bags are used and heat-sealed. 4. Folding cartons are the first choice for mass production of general product packaging. Fixed cartons can be used for small batch production of products with special requirements, such as gifts, light products with large volume or surface area, and can enhance their display and decoration.
