Structural Characteristics and Application of Concave Composite Cardboard (2)

Introduction of concave and convex composite board

The concave-convex composite structure is a new structure used by Jinan Jinshangyi Industrial Co., Ltd. in recent years for research and development of various metal and non-metal composite plates. It is sufficient to overcome the defects of corrugated and honeycomb structures, and to concentrate the basis of the advantages of the two. It uses the advanced high-tech processing forms in the world today to design and develop new structures that are superior to bionics and are called by some experts. Three generations of composite structures. The commentary at the International Invention Fair in Nuremberg, Germany, “is on this technical level and will always be in the leading position in the world for several years”.

First, first and second generation composite structure: characteristics of corrugated and honeycomb composite structure

Corrugated paper has been used for paper lamination for more than 100 years. Its strength is much better than that of flat-sheet paper compounding. It can save a lot of wood and has been widely used for product packaging, transportation and storage. It has become a must in every walk of life and people's daily life. Less packaging plates have generated hundreds of billions of dollars in output value worldwide. However, the unidirectionality of the strength distribution of the sheet, the easy-to-fold direction of the sheet, and the conceivable defect of the variable type are not suitable for the high-strength and multi-directional demands of the modern society. The honeycomb structure developed since the 1970s has high strength, light weight, and saving raw materials, and it has strong advantages. It began to be used by the United States for military purposes such as high-altitude reconnaissance aircraft, and was listed in the United States as a hi-tech technology and externally imposed a technical blockade. Later, it was used in the civilian packaging industry. However, its structure was too imitation of honeycomb and its process was complex, equipment investment was large, and processing quality was difficult to control. It is difficult to produce cardboard with a thickness of 5 mm or less, and it has become impossible to reach 1.5 mm or less. Moreover, the cost of the composite board is high and the price is expensive, so it is difficult to promote it on a large scale. Corrugated, honeycomb structures are difficult to use for sheet metal.

Second, the principle and characteristics of convex composite structure

Jinan Jinshangyi Industrial Co., Ltd. focuses on the characteristics of two kinds of composite structures: corrugated and honeycomb, and avoids weaknesses and advantages. After more than two years of experiments and research, Jinan Jinshangyi finally took the lead in the development of a third-generation composite structure with independent intellectual property rights. "Structure", and first of all succeeded in the most widely used composite board field! The concave-convex composite structure is the full use of the extensibility of the sheet, and physical, chemical and other processing methods are adopted to process one, one row of bumps as supporting points on the surface of the sheet. . Each row of bumps is staggered. In these numerous support points up and down composite two plates, that is, convex composite plate.

Its structural features:

(A) The unevenness of the strength distribution of the composite composite structure cardboard is uniform, and compared with the unidirectional distribution of the corrugated medium, the advantage is that the stacking, horizontal and vertical placement of the box and the box can be performed. The same strength as the.

(B), small deformation, due to uneven distribution of uneven composite structure cardboard strength, no flaws horizontal, vertical, oblique, uniform strength, so which direction deformation is smaller than the deformation of corrugated board.

(C), the surface roughness is high, due to uneven distribution of the strength of the concave and convex composite structure of the cardboard, showing multiple directions, so that there is no strip of corrugated cardboard often appear.

(D), flat pressure emphasizes high, due to the convex composite structure of cardboard fulcrum more, even, so its flat compressive strength is much higher than the corrugated, its core single layer, corrugated can not be compared, two layers (ie a One core). Convex composite structure paperboard flat compressive strength more than twice as much as corrugated.

(5) The transverse folding strength is high. Because the strength distribution of the concave-convex composite structure cardboard is sufficient for multiple directions, its transverse folding strength is more than 2.5 times that of the corrugated.

(6) The number of layers is flexible, and the concave-convex composite cardboard can be set according to different packaging needs. For example, the production of thinner cardboard packaging products such as wine boxes can be two-layer molding (ie, “one core”). It saves 150g to 200g per square for the packaging of traditional wine boxes, producing thicker products such as cartons. Corrugated board is usually five layers, and the cardboard with concave-convex composite structure can be compounded in four layers (ie, two layers of core paper and two layers of paper inside) to avoid unnecessary waste.

(seven), the base paper light roller after extrusion, the length of 100%, while the corrugated should be reduced: A tile 60-65%, B tile is 65-70%, in theory, the concave and convex composite cardboard than corrugated core Paper base paper saves 30-42%. After experiments, it has been shown that the core paper composite cost of concave-convex composite structure paperboard is more than 25% lower than that of corrugated medium paper, which is more objective.

(8) The production equipment of the convex-convex composite cardboard is much less than that of the honeycomb cardboard equipment. Due to the fact that the cardboard structure of the concave-convex composite structure is basically the same as that of the corrugated medium, it is realized on the roller. Therefore, the concave-convex composite structure cardboard production line can be refitted with rollers, and there is no need to eliminate the entire production line. This is easy for carton board manufacturers to accept.

(author/Huang Shanxiang)

Information Sources <Paper Packaging Industry>