Sansho Kogyo Transitions to More Heat-Resistant, Durable Rubber on December 5, 2016 in Products Tokyo-based rubber manufacturer Sansho Kogyo Co. Ltd. is moving toward more frequent use of hydrogenated nitrile butadiene rubber (HNBR) and…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading