SPUNBOND NONWOVEN FABRIC AND SANITARY MATERIAL USING THE SAME

• Main Authors: KATSUTA HIROSHI, HARA SHOHEI, MAEKAWA SHIGETOSHI, KAJIWARA KENTARO, TSUCHIYA SHOHEI
• Format: Patent
• Language: English; Japanese
• Published: 29.03.2024
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; BRAIDING; COTTON-WOOL; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; KNITTING; LACE-MAKING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; MEDICAL OR VETERINARY SCIENCE; NON-WOVEN FABRICS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TEXTILES; TREATMENT OR PROTECTION OF EYES OR EARS; TRIMMINGS; WADDING

To provide a spunbond nonwoven fabric having excellent flexibility and mechanical property.SOLUTION: A spunbond nonwoven fabric is composed of fibers made of polypropylene-based resin. A melt mass flow rate of the spunbond nonwoven fabric falls within a range of 20 g/10 minutes to 200 g/10 minutes. The fibers satisfy following (A) and (B) in peak separation analysis of discharge curve in gel permeation chromatography: (A) having at least one peak at which a weight average molecular weight Mw derived from the polypropylene-based resin is 60000 or more and 95000 or less; (B) having at least one peak at which a weight average molecular weight Mw derived from the polypropylene-based resin is 750000 or more and 1500000.SELECTED DRAWING: None 【課題】 優れた柔軟性および力学特性を有するスパンボンド不織布を提供すること。【解決手段】 ポリプロピレン系樹脂からなる繊維によって構成されたスパンボンド不織布であって、該スパンボンド不織布のメルトマスフローレートが２０ｇ／１０分以上２００ｇ／１０分以下の範囲にあり、前記繊維が、ゲルパーミエーションクロマトグラフィーにおける排出曲線のピーク分離解析において、以下の（Ａ）かつ（Ｂ）を満たす、スパンボンド不織布。（Ａ）前記ポリプロピレン系樹脂に由来する、重量平均分子量Ｍｗが６００００以上９５０００以下であるピークを少なくとも１つ有する（Ｂ）前記ポリプロピレン系樹脂に由来する、重量平均分子量Ｍｗが７５００００以上１５０００００以下であるピークを少なくとも１つ有する【選択図】 なし