RUBBER COMPOSITION FOR PAPER FEED MEMBER, AND PAPER FEED ROLLER

• Main Authors: HAMAKUBO SHINJI, FUJII RYOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 30.11.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKING; PERFORMING OPERATIONS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a rubber composition for a paper feed member that contains an ethylene-α-olefin-based resin excellent in ozone resistance and can sufficiently enhance an initial friction coefficient of a roller body or the like of a paper feed roller to a degree such as to cause no paper feed failure even after repeated paper feeding and can suppress degradation of abrasion resistance of the roller body or the like, and to provide a paper feed roller in which the roller body is made of the rubber composition for the paper feed member.SOLUTION: A rubber composition for a paper feed member contains rubber including ethylene-α-olefin-based copolymer rubber, a cross-linking component, and tackifier. The cross-linking component contains at least a sulfur-based cross-linking agent. The tackifier is an alkylphenol-based resin of 2 pts.mass or more and 15 pts.mass or less per 100 pts.mass of the total rubber amount. A roller body 2 of a paper feed roller 1 is made of the rubber composition for the paper feed member.SELECTED DRAWING: Figure 1 【課題】耐オゾン性に優れたエチレン－αオレフィン系樹脂を含み、しかも紙送りローラのローラ本体等の初期の摩擦係数を、給紙を繰り返した際に給紙不良を生じない範囲まで十分に高めることができるうえ、当該ローラ本体等の耐摩耗性の低下を抑制することもできる給紙部材用ゴム組成物と、当該給紙部材用ゴム組成物を用いてローラ本体を形成した紙送りローラを提供する。【解決手段】給紙部材用ゴム組成物は、エチレン－αオレフィン系共重合ゴムを含むゴム、架橋成分、および粘着付与剤を含み、かつ架橋成分は少なくとも硫黄系架橋剤を含んでいるとともに、粘着付与剤は、ゴムの総量１００質量部あたり２質量部以上、１５質量部以下のアルキルフェノール系樹脂である。紙送りローラ１は、上記給紙部材用ゴム組成物を用いてローラ本体２を形成した。【選択図】図１