① Food packaging carton has many complex structural elements. In the composition of paper, there are both longer and shorter fibers from different sources (mainly plant fibers, synthetic fibers and mineral fibers are less), fillers, sizing materials and pigments. Plant fiber is the basis of the structure of most kinds of paper. Due to different types of fiber raw materials and processing methods, their structures and properties are also different.

② The anisotropy of the distribution of structural elements in three mutually perpendicular directions is manifested in the different arrangement directions of fibers, the different distribution of fibers of different sizes, and the different distribution of rubber, pigment, filler and air contained. The anisotropy of this structure mainly depends on the paper making method and equipment used. It also has different effects on the main properties of paper web in various aspects. The tendency of fiber flocculation also affects the properties of paper in all directions.

Cartons for food packaging

③ The characteristics of the structure's porous colloid determine some properties of the paper, such as absorbability, permeability, moisture absorption, deformation when moisture changes, and irreversible changes in properties due to drying.

④ There is a binding force between the structural elements of the paper that determines the mechanical strength and other properties of the paper. Cartons for food packaging

⑤ Most paper structures have two sides, that is, the two sides of the web are different in nature. This is not only determined by the anisotropy of the distribution of structural elements that has been pointed out above, but also by the different states of the two sides of the paper. The difference between the two sides of the paper is usually caused by the fact that one side of the paper is in contact with the screen and the other side is in contact with the blanket, leaving an impression on the paper surface accordingly. The side of the contact screen is generally not smooth and porous.

The composition of the structural elements of food packaging carton is complex and multi-directional, and the distribution is anisotropic. Therefore, even if the paper is fixed in quantity (the deviation is not more than ± 2%), the property of the paper fluctuates in a large range: thickness ± 5%, breaking length ± 20%.

At present, there is a certain amount of 4-layer BE corrugated board in the industry, so the adoption of 4-layer BE corrugated board makes the industry compete fiercely, so many manufacturers expect not to be eliminated here. How can 4-layer BE corrugated board manufacturers be unique in the industry? Henson will talk to you next!

If the manufacturer does not even have the usual level of independent research and development, it is difficult to maintain its main business and cannot follow the needs of the industry, then such 4-layer BE corrugated board cannot meet the needs of the industry.

The 4-layer BE corrugated board manufacturer can win a good reputation because he has always come to see friends and what the industry should want since he formed in the industry, leading the manufacturer to increase its sales, meet the needs of the industry, and let the industry continue to grow and improve.

The reason why commodity manufacturers can be regarded as commodities is that they have guaranteed the specific aspects of quality. If they want to keep their 4-layer BE corrugated board commodities from being reduced and show their sharp points in the industry, they should continue to be unique, so that they can be recognized and liked by the bosses.