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:
Jan. 14, 2025
Filed:
Jan. 26, 2023
Nitto Boseki Co., Ltd., Fukushima, JP;
Yosuke Nukui, Fukushima, JP;
Masaru Urushizaki, Fukushima, JP;
Nitto Boseki Co., Ltd., Fukushima, JP;
Abstract
A glass fiber including a plurality of flat-cross-section glass filaments each having a cross-section in flat shape, the cross-section having a major axis in the range of 15.0 to 25.0 μm, a minor axis in the range of 8.0 to 12.0 μm, and an irregular shape ratio R, being the ratio of the major axis to the minor axis (major axis/minor axis), in the range of 1.5 to 3.0. The flat-cross-section glass fiber has a packing rate P, being the ratio of the cross-sectional area of each flat-cross-section glass filament to the area of a rectangle circumscribing the cross-section of the flat-cross-section glass filament, in the range of 80.1 to 89.9%, and the irregular shape ratio R and the packing rate P satisfy the following formula (1): 337.6≤P/R≤421.2 . . . (1).