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. 10, 2024
Filed:
Dec. 27, 2021
Agc Inc., Tokyo, JP;
Wataru Kasai, Tokyo, JP;
Yuya Horiguchi, Tokyo, JP;
Seigo Kotera, Tokyo, JP;
Tomoya Hosoda, Tokyo, JP;
AGC Inc., Tokyo, JP;
Abstract
As an exemplary configuration, a long film is configured by thermomeltable polymers including a first unit based on tetrafluoroethylene and a second unit based on perfluoro (alkyl vinyl ether), including spherulites of the thermomeltable polymers, wherein radius of each spherulite is 10 μm or less. As another exemplary configuration, a long film is configured by tetrafluoroethylene polymers having a melt flow rate within a range of 5 to 40 g/10 min. The long film is heated at 180° C. for 30 minutes so as to measure the thermal expansion rate, and when letting thermal expansion rate in a first direction, which extends at a 45-degree angle to a melt flow direction be A, and thermal expansion rate in a second direction orthogonal to the first direction be B, A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.