Carton is the most widely used packaging product. There […]
Carton is the most widely used packaging product. There are corrugated boxes, single-layer cardboard boxes, etc. according to different materials. There are various specifications and models. There are three layers and five layers commonly used in cartons. The seven layers are used less. The layers are divided into inner paper, corrugated paper, core paper, facial tissue, and paper, kraft paper, corrugated paper for core paper, and various paper. The color and feel are different. The paper (color, feel) produced by different manufacturers is different.
The raw material of the carton is cardboard, the raw material of the cardboard is the base paper, and the base paper is divided into five kinds of papers of K, A, B, C and 3 papers. The best is K paper, the worst is 3 paper. The same K paper is also the thickest, 3 paper is the thinnest. K, A, B, C paper can be used for paper and paper, 3 paper is used for pit paper or paper, the paper material is usually better than or equal to the paper, such as paper is A paper, the usual combination It is A=A, A=B, A=C, etc., but not A=K.
There is also a kind of paper called W paper, also called white paper, the thickness is close to A paper, generally used for facial tissue. Ordinary items are generally packaged in outer boxes. Some small items and items with higher value are first packaged in inner boxes, inner boxes on the outside, and outer boxes in outermost boxes.