Paper feed roller
AssigneeSumitomo Rubber Industries, Ltd.
InventorsToshihiro Tamura, Akihiro Mine, Hirokazu Nishimori, Hideyuki Okuyama
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Abstract
The paper feed roller according to the present invention is made of a thermoplastic elastomer composition containing an ester thermoplastic elastomer urethane or an ether thermoplastic elastomer urethane (E) having microrubber hardness (type A) of not less than 60 and not more than 80 and a plasticizer (P) in a mass ratio E/P of 70/30 to 50/50.
Claims7
A paper feed roller comprising a roller body made of a thermoplastic elastomer composition containing an ester thermoplastic elastomer urethane containing a polyurethane structure and a polyester structure in the molecules or an ether thermoplastic elastomer urethane containing a polyurethane structure and a polyether structure in the molecules (E) having microrubber hardness (type A) of not less than 60 and not more than 80 and a plasticizer (P) in a mass ratio E/P of 70/30 to 50/50, wherein
- the thermoplastic elastomer urethane is an addition polymer of a diisocyanate, a macropolyol and a chain extender, and the compounding ratio of the components constituting the addition polymer satisfies the following formula (I):
- 20≦(x+z)/(x+y+z)×100<30 (1)
- wherein x, y and z represent the loadings of the diisocyanate, the macropolyol and the chain extender, respectively, and
- the roller body has a microrubber hardness (type A) of less than 60.
Dependencies are inferred from the claim text.