PAPER SHEET MATERIAL MANUFACTURING METHOD AND STORAGE BAG FORMED OF PAPER SHEET MATERIAL

• Main Author: NAMBA MUTSUO
• Format: Patent
• Language: English; Japanese
• Published: 12.05.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; 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; 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; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SPRAYING OR ATOMISING IN GENERAL; STORING; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

To provide a paper sheet material manufacturing method that enables an aqueous heat seal layer to be stably formed with respect to a paper substrate of equal to or less than 35 g/m2.SOLUTION: The present invention is a paper sheet material manufacturing method of using a flexographic press to form a plurality of heat seal layers formed of an aqueous heat seal material by a printing unit of the flexographic press with respect to at least one surface of a paper substrate of equal to or less than 35 g/m2. While a paper substrate 1A is wound around a center drum 20 of the flexographic press and conveyed, printing units 21 to 28 stack four or more heat seal layers. At the time of stack formation of the heat seal layer, after one heat seal layer is formed, vacuum printing process is performed on a downstream side of the heat seal layer.SELECTED DRAWING: Figure 2 【課題】３５ｇ／ｍ2以下の紙製の基材に対して、水系のヒートシール層を安定して形成することを可能にする紙製シート材の製造方法を提供する。【解決手段】本発明は、フレキソ印刷機を用いて、３５ｇ／ｍ2以下の紙製の基材の少なくとも一方の面に対して、フレキソ印刷機の印刷ユニットで水系のヒートシール材によるヒートシール層を複数層形成する紙製シート材の製造方法である。フレキソ印刷機のセンタードラム２０に紙製の基材１Ａを巻回して搬送する間に、印刷ユニット２１～２８で４層以上のヒートシール層を積層すると共に、ヒートシール層の積層形成時において、１層のヒートシール層を形成した後、その下流側で空印刷工程を行なうことを特徴とする。【選択図】 図２