The material and function of the cardboard box
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Regarding the material used in the carton, cardboard is the main force.
Generally, paper with a base 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.
Due to 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 0.3~1.1mm.
Corrugated cardboard: It is mainly composed of two parallel flat sheets the outer paper and the inner paper, with the corrugated core paper processed by the corrugating roller in the middle. Each paper sheet is bonded with corrugated paper coated with adhesive on the corrugated peak.
Corrugated board is mainly used to make outer packaging boxes to protect commodities in circulation, and there is also a finer corrugated paper 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.
White cardboard is made of chemical pulp and pulp, including ordinary white cardboard liner white cardboard, kraft liner white cardboard, etc. There is also white cardboard made of chemical pulp, also known as a high-grade whiteboard.
Yellow cardboard refers to low-grade cardboard made from pulp produced by the lime method with straw as the main raw material.
Kraft paperboard: It is made of kraft pulp. The one with kraft pulp on one side is called a single-sided kraft board, and the one with kraft paper on both sides is called a double-sided kraft board. The main function of corrugated cardboard surface paper is called kraft box board, and its strength is much higher than that of ordinary surface paper board. In addition, it can also be combined with water-resistant resin to make water-resistant kraft cardboard, which is mostly used in beverage collection boxes.
Composite processed paperboard: refers to the paperboard that is composited with other materials such as composite aluminum foil, polyethylene, greaseproof paper, wax, etc. It makes up for the shortcomings of ordinary cardboard and has many new functions such as oil-proof, waterproof, and fresh-keeping.