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AssigneesBLANCO GmbH + Co KG, Schock & Co. GmbH
InventorsStefan Harke, Stefanie Grathwohl, Rudolf Paternoster, Thomas Wilhelm, Klaus Hock, Werner Fenzl
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To improve the resistance to scratching of plastic molded articles comprising a polymer matrix filled with inorganic fillers, the filler content being 50 to 90% by weight in relation to the filled matrix, it is suggested that the filler comprise two filler fractions (a) and (b), wherein the filler fraction (a) has a particle size distribution with 98% by weight of the particles having a particle size .ltoreq.150 .mu.m and is distributed essentially uniformly in the polymer matrix, and wherein the filler fraction (b) comprises particles having a particle size of approximately 300 .mu.m to approximately 3000 .mu.m, wherein the proportion of the filler fraction (b) is approximately 1 to 35% by weight of the total filler content, and wherein the proportion of the filler fraction (b) in an outer surface layer of the molded article is enriched to at least 30% by weight in relation to the total mass of the filled matrix.
Plastic molded article comprising a polymer matrix filled with inorganic fillers and having a visible outer surface, wherein the filler content is 50 to 90% by weight in relation to the filled matrix, wherein the filler material comprises two filler fractions (a) and (b), wherein the filler fraction (a) has a particle size distribution with 98% by weight of the particles having a particle size less than or equal to 150 .mu.m and is distributed essentially uniformly in the polymer matrix, and wherein fraction (b) comprises particles having a particle size of approximately 300 to 3000 .mu.m, further comprising the proportion of the filler fraction (b) is approximately 1 to 35% by weight of the total filler content, and the proportion of the filler fraction (b) in an outer surface layer of the molded article having a thickness of about 3 millimeters or less as measured from said outer surface is enriched to at least 30% by weight in relation to the total mass of the filled matrix.
Plastic molded article comprising a polymer matrix filled with inorganic fillers and having a visible outer surface, wherein the filler content is 50 to 90% by weight in relation to the filled matrix, wherein the filler material comprises two filler fractions (a) and (b), wherein the filler fraction (a) has a particle size distribution with 98% by weight of the particles having a particle size less than or equal to 150 .mu.m and is distributed essentially uniformly in the polymer matrix, and wherein fraction (b) comprises particles having a particle size of approximately 300 to 3000 .mu.m, further comprising the proportion of the filler fraction (b) is approximately 1 to 35% by weight of the total filler content, and the proportion of the filler fraction (b) in an outer surface region of the molded article disposed beneath and proximate said outer surface is enriched to at least 30% by weight in relation to the total mass of the filled matrix.
Dependencies are inferred from the claim text.