The tensile strength and elongation of paper

Tensile strength is the maximum tensile force that an operator can withstand before a unit width of paper or cardboard breaks under the conditions specified in the standard test method. When paper is stretched under tension, it will elongate in the direction of the force. When the pulling force increases to the point where the spline is broken, the elongation reaches its limit. The ratio of the elongated length to the original length at this time is called the elongation rate, which is expressed as a percentage. For web-fed printing, the tensile strength and elongation of the paper are important indicators. Because the paper roll is driven by the rotary printing press, the paper will be subjected to great tension. If the tensile strength is too small, it will cause paper breakage. If the elongation is too large, it will change the size of the paper and increase the registration error. Therefore, using paper with high tensile strength and low elongation can effectively prevent and reduce the occurrence of paper breakage during printing and minimize registration errors.