Bando Chemical Industries, Inc.

Shinji Takahashi

Takayuki Okubo

Hideaki Kawahara

Hisashi Matsuda

Hiroyuki Tachibana

Hiroyuki Shiriike

Takehiro Hayashi

Tomoyuki Yamada

Tadahiko Noguchi

Yasuhiro Takano

Kenichiro Furuta

Masahide Naya

Kentarou Sanematsu

A friction drive belt (B) includes a belt body () that is wrapped around pulleys in contact therewith to transmit power. At least a pulley contact portion () of the belt main body () is made of a rubber composition containing 30-80 parts by mass of at least one layered silicate selected from a smectite group and a vermiculite group, per 100 parts by mass of raw rubber containing an ethylene-&#x3b1;-olefin elastomer.

Friction drive belt

A friction transmission belt has a rubber layer forming a pulley contacting portion. The rubber layer is made of a rubber composition containing a crosslinked rubber component and crosslinked polyolefin particles. Examples of the crosslinked polyolefin particles can contain ultrahigh molecular weight polyolefin particles having an average molecular weight of 500,000 or more.

Friction transmission belt and manufacturing method therefor

In a friction transmission belt including a rubber layer forming a pulley contact surface, the rubber layer includes a rubber composition containing hydrophilic inorganic filler and a sliding-resistant material. The sliding-resistant material protrudes from the pulley contact surface, and is at least one of hydrophobic resin particles and hydrophobic resin fibers having an official regain of 0.4% or below, and in the rubber composition, a content of the hydrophilic inorganic filler with respect to 100 parts by mass of the rubber component is 35 parts by mass or more.

Friction transmission belt

In a friction transmission belt including a rubber layer forming a pulley contact surface, the rubber layer includes a rubber composition containing polyolefin particles and an inorganic filler. In the rubber composition, a total content of the polyolefin particles and the inorganic filler with respect to 100 parts by mass of a rubber component is 85 parts by mass or more.

A friction transmission belt includes short fibers arranged so as to protrude from a surface of a pulley contact-side part made of a rubber composition. The short fibers consist of aramid short fibers and non-aramid synthetic short fibers having a standard moisture regain of equal to or less than 4%.

A belt body () of a friction transmission belt (B) includes a pulley contacting portion () made of a rubber composition. The rubber composition forming the pulley contacting portion () includes an ethylene-&#x3b1;-olefin elastomer as a rubber component, and in the rubber composition, 10-50 parts by mass of calcium carbonate relative to 100 parts by mass of the rubber component, and carbon black whose DBP oil absorption amount measured according to the method A specified in Japanese Industrial Standards (JIS) K 6217-4 is 300 cm/100 g or more are mixed.

A friction drive belt (B) includes a pulley contacting portion () which is made of a rubber composition of an ethylene-&#x3b1;-olefin elastomer as raw rubber in which carbon black having an iodine adsorption number of 40 mg/g or lower, and 3-10 parts by mass of short aramid fiber () relative to 100 parts by mass of the raw rubber are blended.

Friction drive belt and belt transmission system using the same

A method for fabricating a drive belt includes: a cylindrical rubber formation step of forming a cylindrical rubber by roundly joining an uncrosslinked rubber sheet (); and a mold covering step of covering a cylindrical mold with the cylindrical rubber formed in the cylindrical rubber formation step. A mark hot-transfer sheet () is adhered by hot pressing to the juncture of the cylindrical rubber to cover the juncture on the inside of the cylindrical rubber.

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Kobe, Japan

Shinji Takahashi