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AssigneeNippon Paper Industries Co., Ltd.
InventorsKeiko HASHIGUCHI, Hirofumi KONDO, Hiroaki NOGUCHI, Yuji ABE, Satoshi ISHIKAWA, Yukio SHINI
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Clupak paper is manufactured using a gap-former paper-making machine equipped with a Clupak system, in such a way that its longitudinal tensile energy absorption index and lateral tensile energy absorption index as specified in JIS P8113 become 2.5 J/g or more and 1.0 J/g or more, respectively. The paper has excellent strength characteristics in both the longitudinal and lateral directions, especially in the longitudinal direction so that when the Clupak paper can be processed into a sack, the sack rarely breaks.
Clupak paper whose longitudinal tensile index and lateral tensile index as specified in JIS P8113:
Clupak paper whose longitudinal tensile energy absorption index and lateral tensile energy absorption index as specified in JIS P8113:
Clupak paper whose longitudinal tensile stiffness index and lateral tensile stiffness index as specified in ISO/DIS 1924-3 are 4.0 kN·m/g or more and 2.8 kN·m/g or more, respectively.
Dependencies are inferred from the claim text.