Carton is the most widely used packaging products, according to the different materials, there are a variety of specifications. Single-layer cardboard boxes, three-layers, five-layers, seven-layers . Each layer is divided into inside of the paper, corrugated paper, core paper, out of paper. The surface of the paper is divided into tea paperboard, kraft paper. Core is a corrugated paper. Each paper has different colors and different touch feelings.

Different shapes of corrugated cardboard is not the same function. Even with the same quality of paper tissues, due to differences in the shape of corrugated, cardboard performance is also different. Current international common form is divided into four kinds of corrugated . They are A-type, C-type , B-and E-type . A-type made of corrugated board has a good buffer capacity, rich degree of flexibility. C-type Den strength and impact resistance than the A-type good. B-type  arranged density, smooth surface, made of corrugated cardboard, bearing pressure is high, suitable for printing. As the E-type leng thin dense, so it has a high strength. 

     Shanghai Hemei Packaging Material Co., Ltd. specializes in producing cartons, cardboard and other packaging materials, we have professional and technical personnel, will be the best design for you the best service, welcome your order!