RESIN COMPOSITION FOR FOAM MOLDING, AND FOAM MOLDED BODY CONTAINING THE SAME AND METHOD FOR PRODUCING THE SAME

• Main Authors: OKANO MASAKI, FUJII NOZOMI, KUBO MASAHIRO, KOORI YOHEI
• Format: Patent
• Language: English; Japanese
• Published: 15.02.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a resin composition for foam molding excellent in mold transferability at the time of foam molding, and to provide a molded body excellent in appearance and foam uniformity inside of the molded body and a method for producing the same.SOLUTION: A resin composition for foam molding contains 0.5-20 mass% of an olefinic polymer (a) having a melting endothermic amount (ΔH-D) of 0-80 J/g and distribution of a molecular weight (Mw/Mn) of less than 3.0, and 80-99.5 mass% of (b) a polypropylene resin (total content of olefinic polymer (A) and polypropylene resin (B) is 100 mass%); and has a melt flow rate of 1-100 g/10 min.SELECTED DRAWING: None 【課題】発泡成形時の金型転写性に優れる発泡成形用樹脂組成物、並びに外観に優れるとともに、成形体内部の発泡均一性に優れた成形体及びその製造方法を提供する。【解決手段】（ａ）融解吸熱量（ΔＨ−Ｄ）が０〜８０Ｊ／ｇであり、分子量分布（Ｍｗ／Ｍｎ）が３．０未満であるオレフィン系重合体（Ａ）０．５〜２０質量％、及び（ｂ）ポリプロピレン系樹脂（Ｂ）８０〜９９．５質量％を含み（ただし、オレフィン系重合体（Ａ）及びポリプロピレン系樹脂（Ｂ）の合計含有量を１００質量％とする）、かつ、メルトフローレートが１〜１００ｇ／１０ｍｉｎである、発泡成形用樹脂組成物。【選択図】なし