The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2017
Filed:
Nov. 10, 2011
Ikuo Akai, Ichihara, JP;
Tomohiro Abe, Ichihara, JP;
Takayuki Kuroki, Singapore, SG;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
The polyolefin composite film is excellent in low-temperature heat sealability, heat-sealing strength and transparency, and at least has surface layer [i]//intermediate layer [iii]//core layer[i], wherein the surface layer[i]includes a propylene resin composition including 0-50 wt % of a specific propyleneα-olefin random copolymer (A) and/or a specific 1-buteneα-olefin copolymer (E), and 50-100 wt % of a propylene polymer (B) having a melting point of 120-170° C. ((A), (E) and (B) in the surface layer totals 100 wt %); the core layer [ii]includes a propylene resin composition including 70-100 wt % of a crystalline polypropylene (C) having a melting point of 150-170° C., and 0-30 wt % of the copolymer (A) ((C) and (A) in the core layer totals 100 wt %); and the intermediate layer[iii]includes a propylene resin composition including 50-95 wt % of the crystalline polypropylene (C) and 50-5 % of the polymer (B), the copolymer (A), andor the copolymer (E) ((C), (B), (A) and (E) in the intermediate layer totals 100 wt %).