| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition having no influence on the color tone of a resin, obtaining clear dark down to black marks by the irradiation of laser rays, having high mechanical reading accuracy and useful for marking of a bar code, a Karura code, etc., by compounding titanium dioxide as an active component. SOLUTION: The objective composition is obtained by compounding titanium dioxide in an amount of 0.05-70wt.%, preferably 0.1-50wt.%, further preferably 0.1-20wt.% as an active component in a thermoplastic resin such as a polyolefin resin of polyethylene, polypropylene, etc. |
