BIODEGRADABLE LAMINATE FOR PAPER CYLINDER, CYLINDRICAL MOLDING, AND METHOD FOR MANUFACTURING CYLINDRICAL MOLDING

• Main Authors: OKADA YASUNORI, MURASHIMA KENSUKE, SUGIYAMA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2023
• 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 a biodegradable laminate for a paper cylinder having a paper layer composed of a single layer or two layers of paper which has high adhesive strength in spiral winding workability, and has so excellent water resistance as to keep sufficient strength even after use over long time, and a cylindrical molding and a method for manufacturing the same.SOLUTION: A biodegradable laminate for a paper cylinder has a paper layer (A) composed of a single layer or two layers of paper, and a first thermoplastic resin (B1) layer and a second thermoplastic resin (B2) layer each containing a biodegradable resin as a main component on both surfaces of the paper layer, wherein a basis weight of the paper layer (A) is 100 g/m2 or more and 200 g/m2 or less.SELECTED DRAWING: Figure 1 【課題】単層または２層の紙から成る紙層を有する紙筒用生分解性積層体であって、スパイラル巻加工した際の接着強度が高く、また長時間に亘って使用した後でも十分な強度を保てる優れた耐水性を有する紙筒用生分解性積層体、筒状成形体およびその製造方法を提供すること。【解決手段】単層または２層の紙から成る紙層（Ａ）と、その両面にそれぞれ生分解性樹脂を主成分とする第１の熱可塑性樹脂（Ｂ１）層および第２の熱可塑性樹脂（Ｂ２）層を有する紙筒用生分解性積層体であって、前記紙層（Ａ）の坪量が１００ｇ／ｍ２以上２００ｇ／ｍ２以下である、紙筒用生分解性積層体。【選択図】図１