DIE MOLDING PAPER MATERIAL AND MANUFACTURING METHOD FOR DIE MOLDING PAPER MATERIAL

• Main Authors: KOKETSU TAKAYUKI, WATANABE YASUHIRO, KAKIMI SHUNSUKE
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2024
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; IMPREGNATING OR COATING OF PAPER; PACKAGES; PACKAGING ELEMENTS; PACKING; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; STORING; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

To provide a die molding paper material that is superior in processability when a paper molded body having practically sufficient strength is obtained, and a manufacturing method thereof.SOLUTION: A die molding paper material includes at least a first surface layer, a middle layer and a second surface layer in this order. Freeness of pulp of the first surface layer is lower than freeness of pulp of the middle layer. Freeness of pulp of the second surface layer is higher than the freeness of the pulp of the middle layer. The die molding paper material has an aspect ratio of tensile strength of less than 2.SELECTED DRAWING: None 【課題】本発明は実用上充分な強度を備える紙成形体を得る際の加工性に優れる金型成形用紙基材およびその製造方法を提供する。【解決手段】本発明の金型成形用紙基材は、少なくとも第１表面層、中層および第２表面層をこの順に有する。第１表面層のパルプのフリーネスは中層のパルプのフリーネスより低い。かつ、第２表面層のパルプのフリーネスは、中層のパルプのフリーネスより高い。そして、本発明の金型成形用紙基材においては引張強度の縦横比が２未満である。【選択図】なし