Loading patent…
AssigneeDaicel Chemical Industries, Ltd.
InventorsMasami Kita, Hiroshi Sagane, Takashi Matsumoto, Kazuhiko Saeki
Estimating the term…
A resin composition capable of laser marking according to the present invention includes a polyolefin resin in combination with a laser-sensitive component such as a carbon black or metallic compound white pigment and a dispersing aid such as a higher fatty acid compound. The polyolefin resin includes, for example, a polypropylene. The resin composition may further include about 0.5 to 30 parts by weight of an elastomer relative to 100 parts by weight of the polyolefin resin. By irradiating an surface of a molded article obtained from the resin composition with a laser, a mark having a sharp and uniform contrast can be formed on the surface of the molded article.
A resin composition for white marking, which is capable of laser marking and is capable of printing in white with a laser, comprising a polyolefin resin in combination with a carbon black having a mean particle size of 10 to 100 nm and a dispersing aid selected from higher fatty acids and higher fatty acid amides, wherein said carbon black and dispersing aid are present, respectively, in an amount of 0.03 to 4% by weight and in an amount of 0.005 to 6% by weight, relative to the weight of the overall resin composition.
A resin composition for black marking, which is capable of laser marking and is capable of printing in black with a laser, comprising a polyolefin resin in combination with a carbon black having a mean particle size of 10 to 100 nm, a metallic compound white pigment, and a dispersing aid selected from higher fatty acids and higher fatty acid amides, wherein said carbon black, metallic compound white pigment, and dispersing aid are present, respectively, in an amount of 0.03 to 4% by weight, in an amount of 0.2 to 50% by weight, and in an amounts of 0.005 to 6% by weight, relative to the weight of the overall resin composition.
Dependencies are inferred from the claim text.