An inventive rubber composition contains a rubber component including EPDM, a peroxide crosslinking agent, a white filler, and not less than 0.1 part by mass of a quaternary ammonium salt based on 100 parts by mass of the rubber component. An inventive molded rubber product (1) is made from the rubber composition. Thus, the novel rubber composition containing the rubber component including the EPDM, the peroxide crosslinking agent and the white filler can be imparted with any desired color (e.g., a light color such as white or a non-black color) and can form a molded rubber product excellent in strain resistance properties and the like without inhibition of the crosslinking of the EPDM. The molded rubber product is produced by using the rubber composition.

A retarding roller (a roller) is formed of a synthetic rubber (an industrial rubber material) such as ethylene propylene diene M-class rubber (EPDM) or polyurethane, or alternatively, silicone. The roller core of the retarding roller is cylindrical. M arc-shaped long holes (where M is an integer greater than or equal to 4) are formed in each of N layers (where N is an integer greater than or equal to 2) from a first layer (an outermost layer) to an Nth layer (an innermost layer) which are circular and concentric to a center axial line. In each layer, long holes are formed such that spokes in adjacent layers (an ith layer and an i+1th layer, where i is an integer from 1 to N−1) do not overlap in the circumferential direction.

Disclosed is a paper-sheet-feeding/conveying roller having a shaft, and a bi-layer roller material which is formed of an inner layer provided on the shaft and an outer layer. The inner layer provided on the shaft is a foamed elastic layer. The outer layer provided on the foamed elastic layer is a non-foamed elastic layer. The foamed elastic layer is formed of a foamed elastic body of silicone-modified EPDM.

A medium transport device includes a roller transporting a medium, such as recording paper; a first layer covering a surface of the roller facing the medium; a second layer laminated on the first layer; and convex portions provided between the first layer and the second layer, and the convex portions are formed from inorganic particles. The first layer binds the convex portions to the roller, and the second layer covers the convex portions for protection.

A drum cover (20a-c) for a drive drum (12) of a corrugated cardboard machine has a textile carrier layer (21), which has a first coating (22) on a first side and a second coating (23) on a second side. The second coating (23) has a glass transition temperature in the range of 20 C. to 60 C.

A conveyance rollers pair includes a first roller and a second roller. The first roller has a uniform outer diameter and rotates around an axis. The second roller conveys a medium held between the first roller and the second roller while rotating around an axis. The second roller includes a shaft part, a plurality of columnar elastic members and a plurality of tube members. The shaft part extends in an axial direction and is supported rotatably around the axis. The elastic members are fixed to an outer circumferential surface of the shaft part at intervals in the axial direction. Each of the tube member has heat-shrinking property and water-repellency, adheres closely to an outer circumferential surface of the elastic member, and has both end portions which are protruded outward from both axial ends of the elastic member and have a diameter smaller than an outer diameter of the elastic member.

Disclosed is a paper-sheet-feeding/conveying roller having a shaft, and a bi-layer roller material which is formed of an inner layer provided on the shaft and an outer layer. The inner layer provided on the shaft is a foamed elastic layer. The outer layer provided on the foamed elastic layer is a non-foamed elastic layer. The foamed elastic layer is formed of a foamed elastic body of silicone-modified EPDM.

A medium transport device includes a roller transporting a medium, such as recording paper; a first layer covering a surface of the roller facing the medium; a second layer laminated on the first layer; and convex portions provided between the first layer and the second layer, and the convex portions are formed from inorganic particles. The first layer binds the convex portions to the roller, and the second layer covers the convex portions for protection.

A retarding roller (a roller) is formed of a synthetic rubber (an industrial rubber material) such as ethylene propylene diene M-class rubber (EPDM) or polyurethane, or alternatively, silicone. The roller core of the retarding roller is cylindrical. M arc-shaped long holes (where M is an integer greater than or equal to 4) are formed in each of N layers (where N is an integer greater than or equal to 2) from a first layer (an outermost layer) to an Nth layer (an innermost layer) which are circular and concentric to a center axial line. In each layer, long holes are formed such that spokes in adjacent layers (an ith layer and an i+1th layer, where i is an integer from 1 to N1) do not overlap in the circumferential direction.

This invention provides a nip roller that has heat resistance and abrasion resistance, wherein a surface of a substantially cylindrical core is provided with a layer of a rubber, the rubber has a change in hardness in a heat aging test at 150 C. for 72 hours according to JIS K6257:2010 which is less than or equal to 15 degrees in type A durometer hardness according to JIS K6253:2012, and a surface of the layer of the rubber is provided with a layer of an amorphous carbon coat.