25-07-2013 дата публикации
Номер: US20130188003A1
Принадлежит:
Laser marking additives of at least one the core particle selected from the group consisting of copper oxide, chromium oxide, ceramic yellow, cobalt oxide, tungsten oxide, vanadium oxide, titanium oxide, ceramic red, molybdenum oxide, zinc sulfide and any combination thereof, and a coating covering at least part of the core particle comprising at least one oxide of a metal selected from the group consisting of Si, Ti, Ce, Zr, Zn, Al, Ba, Sr, La, Mg, Ca, V, Ta and mixtures thereof. This powder is used with 1064 nm wavelength laser (semiconductor lasers, fiber lasers) to change color in a plastic or polymer substrate to give contrast in laser marking plastics. 2. The laser marking additive of wherein the core particle is selected from the group consisting of copper oxide claim 1 , zinc sulfide and any combination thereof.3. The laser marking additive of wherein the core particle is selected from the group consisting of copper oxide claim 1 , zinc sulfide claim 1 , ceramic yellow claim 1 , cobalt oxide claim 1 , ceramic red and any combination thereof.4. The laser marking additive of wherein the coating comprises at least one oxide of a metal selected from the group consisting of Ti claim 1 , Zn and mixtures thereof.5. The laser marking additive of wherein the coating comprises at least one oxide of Ti.6. A method for producing a laser markable plastic or polymer comprising incorporating into the plastic or polymer at least one laser marking additive comprising:at least one core particle, andat least one coating covering a part of the core particle,wherein the core particle is selected from the group consisting of copper oxide, chromium oxide, ceramic yellow, cobalt oxide, tungsten oxide, vanadium oxide, titanium oxide, ceramic red, molybdenum oxide, zinc sulfide and any combination thereof, andwherein the coating comprises at least one oxide of a metal selected from the group consisting of Si, Ti, Ce, Zr, Zn, Al, Ba, Sr, La, Mg, Ca, V, Ta and mixtures thereof,whereby ...
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