US 12,441,091 B2
Friction transmission belt and manufacturing method thereof
Hiroki Takechi, Hyogo (JP); and Kouhei Hamamoto, Hyogo (JP)
Assigned to Mitsuboshi Belting Ltd., Kobe (JP)
Appl. No. 16/961,156
Filed by Mitsuboshi Belting Ltd., Kobe (JP)
PCT Filed Dec. 27, 2018, PCT No. PCT/JP2018/048133
§ 371(c)(1), (2) Date Jul. 9, 2020,
PCT Pub. No. WO2019/138906, PCT Pub. Date Jul. 18, 2019.
Claims priority of application No. 2018-002080 (JP), filed on Jan. 10, 2018; and application No. 2018-235506 (JP), filed on Dec. 17, 2018.
Prior Publication US 2020/0362941 A1, Nov. 19, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 25/10 (2006.01); B29D 29/10 (2006.01); B32B 3/30 (2006.01); F16G 5/08 (2006.01)
CPC B32B 25/10 (2013.01) [B29D 29/103 (2013.01); B32B 3/30 (2013.01); F16G 5/08 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/062 (2013.01); B32B 2433/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A frictional power-transmission belt having a frictional power-transmission surface covered with a composite fiber layer, wherein
the composite fiber layer comprises a fiber member and an isocyanate compound, wherein the composite fiber layer does not contain either a resorcin-formaldehyde resin or an epoxy resin,
the fiber member is a multilayer knitted fabric comprising a cellulose-based fiber and a synthetic fiber,
the isocyanate compound is a thermally-reactive isocyanate compound,
the isocyanate compound has a proportion of 5 to 20 mass % in the composite fiber layer, and
a ratio of the cellulose-based fiber to the synthetic fiber is 80/20 to 50/50 in the fiber member.