CPC B29C 45/372 (2013.01) [B60R 13/02 (2013.01); B29L 2011/00 (2013.01); B29L 2031/3005 (2013.01)] | 20 Claims |
1. A resin member comprising:
a resin substrate; and
a micro-embossed pattern formed on a surface of the resin substrate and having a plurality of recesses and a plurality of protrusions, wherein
a plane passing through three optional lowest points that are deepest points included in the micro-embossed pattern per unit area is used as a reference plane, and a shortest distance from the reference plane to an optional point on the micro-embossed pattern is regarded as a height of the micro-embossed pattern,
the plurality of protrusions includes:
a plurality of first protrusions having a height of from 15 μm to 35 μm; and
a plurality of second protrusions having a height of from ¼ to ¾ of the height of the first protrusions,
a distance between peaks of two adjacent ones of the plurality of protrusions ranges from 100 μm to 500 μm,
in a cross sectional view perpendicular to the reference plane, the micro-embossed pattern extends a predetermined distance in a direction parallel to the reference plane and is divided into minute regions each having a predetermined length between a first pair of points on the reference plane projected thereon from a corresponding second pair of points located on the micro-embossed pattern,
in the cross-sectional view perpendicular to the reference plane, the number of the minute regions having an angle of inclination formed between a straight line passing through the second pair of points and the reference plane of from −10° to 10° ranges from 78% to 95% of the number of all of the minute regions included in the micro- embossed pattern extending the predetermined distance, and
the number of the minute regions having an angle of inclination of from −1° to 1° ranges from 25% to 40% of the number of all of the minute regions.
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