US 11,702,773 B2
Glass roving cloth and glass-fiber-reinforced resin sheet
Yosuke Nukui, Fukushima (JP); Junya Sakata, Gunma (JP); and Hideaki Monma, Fukushima (JP)
Assigned to Nitto Boseki Co., Ltd., Fukushima (JP)
Appl. No. 17/600,712
Filed by NITTO BOSEKI CO., LTD., Fukushima (JP)
PCT Filed Mar. 17, 2020, PCT No. PCT/JP2020/011827
§ 371(c)(1), (2) Date Oct. 1, 2021,
PCT Pub. No. WO2021/002066, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 2019-123341 (JP), filed on Jul. 2, 2019.
Prior Publication US 2022/0170186 A1, Jun. 2, 2022
Int. Cl. D03D 15/267 (2021.01); D03D 15/50 (2021.01); D02G 3/18 (2006.01); D02G 3/22 (2006.01); D03D 13/00 (2006.01); D03D 25/00 (2006.01)
CPC D03D 15/267 (2021.01) [D02G 3/18 (2013.01); D02G 3/22 (2013.01); D03D 13/008 (2013.01); D03D 15/50 (2021.01); D10B 2101/06 (2013.01)] 6 Claims
 
1. A glass roving cloth comprising:
a warp yarn; and
a weft yarn,
the warp yarns being glass rovings each comprising glass filaments, each having a filament diameter Dt in a range of 9.5 to 30.0 μm, bundled in a number bundled Ft in a range of 400 to 8000,
the weft yarns being glass rovings each comprising glass filaments, each having a filament diameter Dy in a range of 9.5 to 30.0 μm, bundled in a number bundled Fy in a range of 400 to 8000, wherein
a weaving density of the warp yarns Wt and a weaving density of the weft yarns Wy are each in a range of 2.0 to 14.0 yarns/25 mm,
a warp yarn average yarn width Bt and a weft yarn average yarn width By are each in a range of 500 to 8000 μm,
a warp yarn widening rate Et (100×Bt/(Dt×Ft)) and a weft yarn widening rate Ey (100×By/(Dy×Fy)) are each in the range of 3.0 to 30.0%,
a glass occupancy in a warp yarn direction Mt (100×Bt/(25000 (μm)/Wt)) is in a range of 90.0 to 106.0%, and
a glass occupancy in a weft yarn direction My (100×By/(25000 (μm)/Wy)) is in a range of 75.0 to 99.0%.