| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite rib the side walls of which hardly buckle to enable improvement in rigidity, a resin molded article having the composite rib, and a masking material.SOLUTION: In a masking material mounted at a masking object point where an article should not be surface-treated to protect the masking object point from surface treatment, a composite rib 20 provided at a thin-walled flat part is configured of: a rib body 20A, consisting of a top face 21 and both side walls 22 suspended integrally from both edges of the top face 21, and a plurality of recess-grooved longitudinal ribs 23 longitudinally arranged in parallel on both the side walls 22 of the rib body 20A.SELECTED DRAWING: Figure 3 |
