Separator, machine element, motion guide device and industrial machine

A motion guide device, comprising:

• a first member being at machine element comprising a separator and a plurality of spheres, wherein the separator is configured to retain the plurality of spheres under a condition that the plurality of sphere, are apart from each other, the separator comprising a resin composition containing a fluororesin and an elastomer component, the fluororesin containing vinylidenefluoride as a main component, wherein the elastomer component is dispersed in the fluororesin;
• and
• a second member being another machine element configured to move relatively to the first member,
• the plurality of spheres being arranged on one of the first member or the second member and being in contact with both of the first member and the second member, and rolling of the plurality of sphere enabling the relative movement, and
• the second member being combined with the first member under a condition that the second member is in contact with the plurality of spheres.