The high stiffness can also be said to be thickness, because the stiffness of the customized paper cup raw material roll products generally increases with the increase of thickness. The influence of thickness on stiffness is mainly that when the tightness is constant, the stiffness increases with the cube of the thickness; when the basis weight of the customized paper cup raw material roll is constant, the stiffness increases with the square of the thickness.
Stiffness index is an important index to measure the coated paper, and improving the stiffness is a technical key to paper production. The main factors affecting the roll stiffness of the customized paper cup raw material roll products are the selection and ratio of fiber raw materials, the thickness of cardboard, the control of moisture and the use of chemical additives.
The thickness of the paper cup raw material roll products can be increased in the following ways. First, the bulk of the paper sheet can be increased by reducing the beating degree of the paper. Secondly, fiber raw materials with high bulk can also be used to increase the thickness of the customized paper cup raw material roll products. The third way is to increase the thickness by reducing the pressure on the press and calender. Finally, reducing the tension of the drying wire in the front section of the drying section, and reducing the use of fillers or not, can also increase the paper thickness of the customized paper cup raw material roll products.
