ROLL MEMBER, COATING DEVICE, SEPARATOR PRODUCTION DEVICE, AND SECONDARY BATTERY PRODUCTION DEVICE

摘要

A roll member having an outer circumferential surface in which a plurality of grooves are formed, wherein the plurality of grooves are arranged at an angle relative to a direction parallel to a central axis of the roll member. A coating device for coating a film member with a coating liquid, the coating device comprising the roll member. A separator production device for producing a separator in which a heat-resistant layer is laminated over a substrate. The separator production device comprising the coating device. A secondary battery production device for producing a secondary battery comprising a positive electrode plate, a negative electrode plate, and a pair of separators that sandwich the positive electrode plate or the negative electrode plate therebetween. The secondary battery production device comprising the separator production device.

主权项

1. A roll member having an outer circumferential surface in which a plurality of grooves are formed, wherein
the plurality of grooves are arranged at an angle relative to a direction parallel to a central axis of the roll member; in the outer circumferential surface of the roll member, there are provided a processing region where the plurality of grooves are formed and a non-processing region where the plurality of grooves are not formed; the processing region has a first processing region provided in one end portion in a width direction of the processing region parallel to the central axis, a second processing region provided in the other end portion in the width direction of the processing region, and a third processing region that is a processing region other than the first and second processing regions; grooves in the third processing region are even in depth; grooves in the first processing region are smaller in depth than the grooves in the third processing region; the depth of the grooves in the first processing region gradually decreases as the distance from the one end portion in the width direction of the processing region decreases; grooves in the second processing region are smaller in depth than the grooves in the third processing region; the depth of the grooves in the second processing region gradually decreases as the distance from the other end portion in the width direction of the processing region decreases; and a first length that is the length of the first processing region in the direction parallel to the central axis is different from a second length that is the length of the second processing region in the direction parallel to the central axis.