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:
Sep. 01, 2015
Filed:
Mar. 06, 2012
Teruo Monno, Tsuchiura, JP;
Tetsuya Asano, Tsuchiura, JP;
Masami Sugata, Tsuchiura, JP;
Takanori Nakatsuka, Tsuchiura, JP;
Teruo Monno, Tsuchiura, JP;
Tetsuya Asano, Tsuchiura, JP;
Masami Sugata, Tsuchiura, JP;
Takanori Nakatsuka, Tsuchiura, JP;
Toray Industries, Inc., , JP;
Abstract
A biaxially stretched polypropylene film includes protrusions on both surfaces, in which the biaxially stretched polypropylene film has a thickness t1 of 1 μm to 3 μm, has a tensile strength in the machine direction of 120 MPa to 250 MPa, has a tensile strength in the transverse direction of 250 MPa to 400 MPa, has a minimum protrusion height Pof 100 nm or greater and a maximum protrusion height Pof 1,600 nm or smaller for either surface, and satisfies all of Formulae (1) to (3) when one of the surfaces is surface A and the other is surface B: 0.5≦Pa/Pa≦1.0 (1), 0.5≦Pb/Pb≦1.0 (2), and 600≦Pa+Pb≦1,200 (3).