US 12,270,456 B2
Raw edge V-belt
Ikuhito Doi, Kobe (JP); Shogo Kobayashi, Kobe (JP); and Noriaki Naoda, Kobe (JP)
Assigned to BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed by BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed on Dec. 6, 2021, as Appl. No. 17/543,499.
Application 17/543,499 is a continuation of application No. PCT/JP2020/018371, filed on May 1, 2020.
Claims priority of application No. 2019-107200 (JP), filed on Jun. 7, 2019.
Prior Publication US 2022/0090647 A1, Mar. 24, 2022
Int. Cl. F16G 5/04 (2006.01); C08L 15/02 (2006.01); F16G 5/08 (2006.01); F16G 5/20 (2006.01)
CPC F16G 5/04 (2013.01) [C08L 15/02 (2013.01); C08L 2205/03 (2013.01); C08L 2205/06 (2013.01); C08L 2205/16 (2013.01); F16G 5/08 (2013.01); F16G 5/20 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A raw edge V-belt, comprising:
a compression rubber layer formed on an inner side of the belt and made of a rubber composition, wherein
the rubber composition contains a rubber component, fine cellulose fibers, para-aramid short fibers, and carbon black,
a content of the para-aramid short fibers in the rubber composition is 27 parts by mass or more and 40 parts by mass or less per 100 parts by mass of the rubber component, and a volume fraction of the para-aramid short fibers in the rubber composition is 12.5 vol % or more, and
a sum of the content of the carbon black and the content of the para-aramid short fibers in the rubber composition is 68 parts by mass or more and 77 parts by mass or less per 100 parts by mass of the rubber component.