Invention Grant
- Patent Title: Glass cloth, prepreg, and glass fiber-reinforced resin molded product
-
Application No.: US17599133Application Date: 2020-08-20
-
Publication No.: US11746447B2Publication Date: 2023-09-05
- Inventor: Hirotaka Ikejiri , Masahiro Awano , Kimihiro Takatsu
- Applicant: NITTO BOSEKI CO., LTD.
- Applicant Address: JP Fukushima
- Assignee: Nitto Boseki Co., Ltd.
- Current Assignee: Nitto Boseki Co., Ltd.
- Current Assignee Address: JP Fukushima
- Agency: Carrier Shende & Associates, P.C.
- Agent Joseph P. Carrier; Fulchand P. Shende
- Priority: JP 19154708 2019.08.27
- International Application: PCT/JP2020/031449 2020.08.20
- International Announcement: WO2021/039582A 2021.03.04
- Date entered country: 2021-09-28
- Main IPC: D03D15/267
- IPC: D03D15/267 ; C08J5/24 ; D03D15/46 ; D03D15/37 ; D03D15/41

Abstract:
A glass cloth including warp yarns and weft yarns that are glass yarns each formed by bundling 30 to 44 glass filaments each having a circle-equivalent diameter of 3.0 to 4.4 μm, wherein the weaving density of the warp yarns and the weft yarns is 85 to 125 yarns/25 mm, at least either of the warp yarn and the weft yarn is a flat glass yarn formed of flat glass filaments, the weaving density thereof is less than 100 yarns/25 mm, the major axis DL of the flat glass filament is 3.3 to 6.0 μm, the minor axis DS is 2.0 to 3.9 μm, the number of twists T of each of the flat glass yarns is 0.70 twists/25 mm or less, and the number of the flat glass filaments F constituting each of the flat glass yarns, T, DL, and DS satisfy the following expression:
89.0
≤
F
×
(
DL
×
(
1
-
T
1
/
2
)
+
DS
×
T
1
/
2
)
/
(
DL
/
DS
)
≤
129.0
.
89.0
≤
F
×
(
DL
×
(
1
-
T
1
/
2
)
+
DS
×
T
1
/
2
)
/
(
DL
/
DS
)
≤
129.0
.
Public/Granted literature
- US20220089824A1 GLASS CLOTH, PREPREG, AND GLASS FIBER-REINFORCED RESIN MOLDED PRODUCT Public/Granted day:2022-03-24
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