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. 23, 2025
Filed:
Feb. 14, 2024
Nitto Boseki Co., Ltd., Fukushima, JP;
Takanobu Hosokawa, Koriyama, JP;
Ryo Nishikubo, Koriyama, JP;
Yoichi Hiraishi, Koriyama, JP;
Tadashi Kurita, Koriyama, JP;
Nitto Boseki Co., Ltd., Fukushima, JP;
Abstract
Provided is a glass composition for glass fiber that enables molten glass with a low 1000 poise temperature, a wide working temperature range, and suppressed phase separation to be obtained, and that enables, when glass fiber is produced using the molten glass, glass fiber with a low coefficient of linear thermal expansion without deteriorating spinnability even if mass production is performed over a long period of time. The glass composition for glass fiber of the present invention includes 42.00 to 63.00% by mass of SiO, 19.00 to 27.30% by mass of AlO, more than 3.00% by mass and 13.00% by mass or less of ZnO, 6.50 to 19.00% by mass of PO, 0.00 to 7.00% by mass of MgO, and 1.00% by mass or less in total of LiO, NaO, and KO, with respect to the total amount.