PACKAGING PAPER AND PACKAGING MATERIAL

• Main Authors: NAKAJIMA HAJIME, TANAKA MOTOHARU
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2023
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

To provide packaging paper which is environment-friendly and has good heat seal strength.SOLUTION: Packaging paper has a paper base material containing pulp as a main component, and a heat seal layer stacked on one surface or both surfaces of the paper base material, wherein the main component of the heat seal layer is a polylactic acid, a coating amount of the heat seal layer is 5.0 g/m2 or more and 10.0 g/m2 or less, Young's modulus measured according to JIS-K7127(1999) of the heat seal layer is 0.30 N/mm2 or more and 240.0 N/mm2 or less, and the heat seal layer does not contain a water-soluble polymer. Bekk smoothness on the surface of the stacked surface of the heat seal layer on the paper base material is preferably 5 seconds or more and 80 seconds or less. Moisture vapor permeability is preferably 2,500 g/m2 24 hr or more and 5,000 g/m2 24hr or less. Peeling strength at 130°C of the heat seal layer is preferably 1.50 N/15 mm or more.SELECTED DRAWING: None 【課題】環境に優しく、良好なヒートシール強度を有する包装紙を提供する。【解決手段】本発明の一態様に係る包装紙は、パルプを主成分とする紙基材と、上記紙基材の片面又は両面に積層されるヒートシール層とを備えており、上記ヒートシール層の主成分がポリ乳酸であり、上記ヒートシール層の塗工量が５．０ｇ／ｍ２以上１０．０ｇ／ｍ２以下であり、上記ヒートシール層のＪＩＳ－Ｋ７１２７（１９９９）に準拠して測定されるヤング率が０．３０Ｎ／ｍｍ２以上２４０．０Ｎ／ｍｍ２以下であり、上記ヒートシール層が水溶性高分子を含有しない。上記紙基材におけるヒートシール層積層面の表面のベック平滑度が５秒以上８０秒以下であることが好ましい。透湿度が２５００ｇ／ｍ２・２４ｈｒ以上５０００ｇ／ｍ２・２４ｈｒ以下であることが好ましい。上記ヒートシール層の１３０℃における剥離強度が１．５０Ｎ／１５ｍｍ以上であることが好ましい。【選択図】なし