프로필렌계 중합체 조성물, 무연신 필름 및 적층체

• Main Authors: SHIMIZU HIROKI, MURAKAMI TOMOYA, KIMURA TOKUTARO
• Format: Patent
• Language: Korean
• Published: 13.06.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

[과제] 종래의 무연신 필름에 비해 강성이 우수한 무연신 필름을 형성 가능한 프로필렌계 중합체 조성물을 제공한다. [해결 수단] 특정한 프로필렌계 중합체(A)와, 융점이 120∼170℃이고, 135℃, 테트랄린 용매 중에서 측정되는 극한 점도[η]가 1.5dl/g 초과 5.0dl/g 이하인 프로필렌계 중합체(B)를 함유하며, 상기 프로필렌계 중합체(A) 및 상기 프로필렌계 중합체(B)의 합계 100질량부에 대해서, 상기 프로필렌계 중합체(A)의 함유량이 2∼30질량부이고, 상기 프로필렌계 중합체(B)의 함유량이 70∼98질량부인 것을 특징으로 하는 프로필렌계 중합체 조성물. [Problem] To provide a propylene-based polymer composition capable of forming a non-stretched film having superior rigidity as compared to conventional non-stretched films. [Solution] This propylene-based polymer composition is characterized by containing a specific propylene-based polymer (A) and a propylene-based polymer (B) having a melting point of 120-170°C and a limiting viscosity [η] more than 1.5 dl/g but not more than 5.0 dl/g as measured in a tetralin solvent at 135°C, wherein, with respect to the total of 100 parts by mass of the propylene-based polymer (A) and the propylene-based polymer (B), the contained amount of the propylene-based polymer (A) is 2-30 parts by mass and the contained amount of the propylene-based polymer (B) is 70-98 parts by mass.