| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a resin-coated pipe to which a bar code is efficiently given without needing auxiliary material for attaching the bar code. <P>SOLUTION: The resin-coated pipe is such that a resin-coated layer 3 is formed on the outer peripheral side surface of a pipe material 1 having an appropriate length, and the outer surface of the coated layer 3 is irradiated with laser light to form a bar code 4 in a longitudinal direction of the pipe material 1, so that any auxiliary materials for attaching many kinds of bar codes for respective resin-coated pipes are not required and the bar codes are efficiently given without bonding or wrapping bar code-printed adhesive seals or films. <P>COPYRIGHT: (C)2010,JPO&INPIT |
