Structurally, the carton will vary according to the packaging requirements of different products. Similarly, taking medicine packaging as an example, the requirements for the packaging structure of tablets and bottled medicines are also very different. Bottled liquid medicine requires high-strength, extrusion-resistant cardboard to form a strong structure to form a protective layer, and its structure is generally combined inside and outside. The inner layer usually adopts a fixed medicine bottle device, and the size of the outer packaging has a great relationship with the specification of the bottle. Some packaging cartons are disposable, such as household tissue boxes, which do not need to be particularly strong, but need to use paper products that meet the requirements of food hygiene packaging, which is also very economical in terms of cost.
       In terms of materials and craftsmanship, the cigarette case is a representative. High-grade white cards are used for hard case cigarette packs, and the structure and size are fixed. In terms of printing technology, many manufacturers choose more reliable anti-counterfeiting printing, cold foil technology, etc. Therefore, theatrical printing materials and printing technology with bright colors and difficult copy-proof technology are more sought after by tobacco manufacturers. There are also cartons with more complex structures and various materials, such as colorful gift packaging, high-end tea packaging, and even the once-popular Mid-Autumn gift cake packaging box. Some packaging is designed to protect the product more safely, highlighting the preciousness and luxury of the product, and some are completely packaged for the packaging and do not meet the practical function of the packaging to be introduced below.
       The use of carton materials, cardboard is the main force. Generally speaking, paper with a basis weight of more than 200gsm or a thickness of more than 0.3mm is called cardboard. The raw material of cardboard is basically the same as that of paper. Because of its high strength and easy folding, it has become the main production paper for packaging cartons. There are many types of cardboard, and the thickness is generally between 0.3-1.1 mm.
       Corrugated cardboard: Two parallel flat papers are used as the outer layer paper and the inner layer paper, and the corrugated corrugated paper processed by the corrugating roller is sandwiched in the middle. Each sheet is bonded with corrugated paper coated with cold front adhesive. Corrugated cardboard is mainly used to make outer packaging boxes to protect commodities in circulation. There are also thinner corrugated cardboards that can be used as the inner village of commodity cardboard packaging to reinforce and protect commodities. There are many types of corrugated paper, including single-sided, double-sided, double-layer and multi-layer.