​Types of materials for packaging cartons

Cartons are the most common type of packaging in paper product packaging and printing. The materials used include corrugated paper, cardboard, gray bottom board, white card and special art paper. Some also use cardboard or multi-layer lightweight embossed wood boards combined with special paper. Get a stronger support structure. There are also many products suitable for carton packaging, such as common medicines, food, cosmetics, tobacco, home appliances, small hardware, glassware, ceramics, electronic products, etc.

In terms of structural design, cartons need to change according to the packaging requirements of different products. For example, in the same pharmaceutical packaging, tablets and bottled potions have very different packaging structure requirements. Bottled potions require high-strength, extrusion-resistant cardboard combined with a solid structure to form a protective layer. The structure generally combines the inside and outside, and the inner layer is usually also used. When fixing medicine bottles, the size of the outer packaging has a great relationship with the specifications of the bottles. Some packaging cartons are disposable after one use, such as household tissue boxes. They do not need to be extremely strong, but they need to be made of paper products that meet food hygienic packaging requirements, and are also very economical in terms of cost.

Tobacco boxes are very particular about materials and processes. Hard-box cigarette packs use high-grade white card and have fixed structural forms and specifications. In terms of printing technology, many manufacturers choose more reliable anti-counterfeiting printing and cold foil processes. etc. Therefore, printing drama materials and printing processes with bright colors and difficult copy-proof technology are even more popular among tobacco manufacturers. There are also cartons that use more complex structures and a variety of materials, such as various gift packaging, high-end tea packaging, and even the once-popular Mid-Autumn Festival gift cake packaging boxes. In order to protect the product more safely and highlight its preciousness and luxury, some packaging Some are packaged solely for the sake of packaging and do not meet the practical functions of packaging as described below.

In terms of materials used in cartons, cardboard is the main force. Generally, paper with a basis weight of more than 200gsm or a thickness of more than 0.3mm is called cardboard. The raw materials for making cardboard are basically the same as paper. Due to its high strength and easy folding characteristics, it has become the main paper used in the production of packaging cartons. There are many types of cardboard, and the thickness is generally between 0.3~1.1mm.

Corrugated cardboard: It is mainly composed of two parallel flat sheets as the outer paper and the inner paper, with a corrugated corrugated core paper processed by corrugating rollers sandwiched between them. Each paper page is bonded to the corrugated paper coated with adhesive on the corrugated peaks. Corrugated board is mainly used to make outer packaging boxes to protect goods during circulation. Finer corrugated paper can also be used as the inner village of commodity cardboard packaging to reinforce and protect goods. There are many types of corrugated paper, including single-sided, double-sided, double-layer and multi-layer.

White cardboard is made of chemical pulp and high-grade paper pulp, including ordinary white cardboard liner white cardboard, kraft pulp liner white cardboard, etc. There is also a kind of white cardboard made entirely from chemical pulp, also known as high-grade whiteboard paper.

Yellow cardboard refers to low-grade cardboard made from straw as the main raw material and pulp produced by the lime method. It is mainly used as a box core pasted in the carton for fixation.

Kraft cardboard: made from sulfate pulp. The one with kraft pulp on one side is called single-sided kraft board, and the one with kraft pulp on both sides is called double-sided kraft board. The main function of corrugated board paper is called kraft box board, and its strength is much higher than that of ordinary paper board. In addition, it can also be combined with water-resistant resin to make water-resistant kraft paperboard, which is mostly used for beverage packaging boxes.

Composite processed cardboard: refers to cardboard made of composite aluminum foil, polyethylene, oil-proof paper, wax and other materials. It makes up for the shortcomings of ordinary cardboard and has many new functions such as oil-proof, waterproof, and fresh-keeping.