The importance of paperboard stiffness
Stiffness is a basic performance indicator for cardboard and whiteboard.
Paper stiffness is an important indicator that directly affects the stiffness of the crease (another factor is the die-cutting pressure), which affects the finished product. The stiffness is small, the finished product is easy to crush and warp; the stiffness is large, and the finished product is difficult to form.
Packaging paper has requirements for stiffness. Different degrees of paper have different stiffness. Generally, the square of the thickness is proportional. The thicker the cardboard, the higher the stiffness.
Factors affecting the stiffness of the bend
There are many factors that affect stiffness. The thickness and modulus of elasticity of the board are the most basic factors affecting the stiffness of the board or paper. When the thickness is constant, the stiffness increases as the tightness increases. When the weight is constant, the increase in tightness increases slightly after a slight increase, but the overall trend is a net increase.
Paperboard stiffness test method
The measurement method of the stiffness is fixed, and the bending strength of the test sample is not fixed, and the sample is freely bent to measure the strength change. Some test methods have both. The stiffness of the paper is commonly used in the Clark and Grayer methods.
The importance of paperboard stiffness
Stiffness is a basic performance indicator for cardboard and whiteboard.
Paper stiffness is an important indicator that directly affects the stiffness of the crease (another factor is the die-cutting pressure), which affects the finished product. The stiffness is small, the finished product is easy to crush and warp; the stiffness is large, and the finished product is difficult to form.
Packaging paper has requirements for stiffness. Different degrees of paper have different stiffness. Generally, the square of the thickness is proportional. The thicker the cardboard, the higher the stiffness.
Factors affecting the stiffness of the bend
There are many factors that affect stiffness. The thickness and modulus of elasticity of the board are the most basic factors affecting the stiffness of the board or paper. When the thickness is constant, the stiffness increases as the tightness increases. When the weight is constant, the increase in tightness increases slightly after a slight increase, but the overall trend is a net increase.
Paperboard stiffness test method
The measurement method of the stiffness is fixed, and the bending strength of the test sample is not fixed, and the sample is freely bent to measure the strength change. Some test methods have both. The stiffness of the paper is commonly used in the Clark and Grayer methods.
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