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What are the factors that affect the stiffness of the paper board? Test method for stiffness of paper board

Number of visits: Date:2016-09-12 14:34:58

Importance of paper board stiffness
Stiffness is one of the basic performance indicators for case board and white board.
The stiffness of the paper is a very important index, which directly affects the size of the creases (another factor is the die cutting pressure), which affects the forming of finished products. The stiffness is small, the finished product is easy to collapse, and the stiffness is large.
Packaging paper on the stiffness requirements, different quantitative paper stiffness is different, generally with the thickness of the square is proportional to the relationship, the thicker the board the higher the stiffness.
Factors affecting bending stiffness
There are many factors affecting stiffness. The thickness and elastic modulus of the board are the most important factors that affect the stiffness of the board or paper. When the thickness is constant, the stiffness increases with the tightness. When the weight is constant, with the increase of tightness, the slight increase will decrease slightly, but the general trend is a net increase.
Test method for stiffness of paper board
Stiffness measurement method has fixed, there is no fixed angle test sample of the bending strength, the sample free bending measurement of its strength changes. Some test methods two. The measurement of the stiffness of Clark and Glyle.

TypeInfo: Dynamics

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