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ORGANIC SOLVENT-BASED CONCENTRATED INK COMPOSITION FOR GRAVURE PRINTING AND GRAVURE PRINTING METHOD
ORGANIC SOLVENT-BASED CONCENTRATED INK COMPOSITION FOR GRAVURE PRINTING AND GRAVURE PRINTING METHOD
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机译:用于凹版印刷的基于有机溶剂的浓缩油墨组合物和凹版印刷方法
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摘要
The present invention provides an organic solvent-based concentrated ink composition for gravure printing which shows good print density, printability, and laminatability even in gravure printing using a shallow cylinder. The organic solvent-based concentrated ink composition for gravure printing mainly includes a pigment; binder resin; and an organic solvent. The pigment includes at least one of an organic pigment and an inorganic pigment. The binder resin includes polyurethane resin. A solution obtainable by dissolving 30 parts by mass of the polyurethane resin in 70 parts by mass of the organic solvent has a viscosity of 100 to 500 mPa·s/25° C. The concentrated ink composition has a viscosity of 10 to 1000 mPa·s/25° C. and has a viscosity in gravure printing of 12 to 23 s/25° C. in terms of the efflux time from a Zahn cup #3. The concentrated ink composition satisfies one of the following conditions 1 to 3:;Condition 1: the pigment being an organic pigment; the amount of the organic pigment being 5 to 20% by mass and the amount of the polyurethane resin being 3 to 20% by mass each in the organic solvent-based concentrated ink composition for gravure printing; and the amount of the polyurethane resin being 60 to 200 parts by mass for 100 parts by mass of the organic pigment;;Condition 2: the pigment being an inorganic pigment; the amount of the inorganic pigment being 5 to 70% by mass and the amount of the polyurethane resin being 3 to 20% by mass each in the organic solvent-based concentrated ink composition for gravure printing; and the amount of the polyurethane resin being 5 to 60 parts by mass for 100 parts by mass of the inorganic pigment; and;Condition 3: the pigment including both an organic pigment and an inorganic pigment; the amount of the organic pigment being 5 to 20% by mass in the organic solvent-based concentrated ink composition for gravure printing; the ratio by mass ((mass of inorganic pigment)/(mass of organic pigment)) of the organic pigment to the inorganic pigment satisfying 0(mass of inorganic pigment)/(mass of organic pigment)7.0; the amount of the polyurethane resin being 3 to 20% by mass; and the amount of the polyurethane resin being 20 to 200 parts by mass for 100 parts by mass of the whole pigments.
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机译:本发明提供了一种用于凹版印刷的有机溶剂基浓缩油墨组合物,即使在使用浅圆筒的凹版印刷中,该组合物也显示出良好的印刷密度,印刷性和可层压性。凹版印刷用有机溶剂基浓缩油墨组合物主要包括颜料;和粘结剂树脂;和有机溶剂。颜料包括有机颜料和无机颜料中的至少一种。粘合剂树脂包括聚氨酯树脂。通过将30质量份聚氨酯树脂溶解在70质量份有机溶剂中而获得的溶液的粘度为100〜500mPa·s / 25℃。浓缩油墨组合物的粘度为10〜1000mPa·。 s / 25℃,并且在凹版印刷中具有从Zahn杯#3流出的时间为12至23s / 25℃的粘度。浓缩油墨组合物满足以下条件1至3之一:条件1:颜料是有机颜料;和在凹版印刷用有机溶剂系浓缩油墨组合物中,有机颜料的含量为5〜20质量%,聚氨酯树脂的含量为3〜20质量%。相对于100质量份有机颜料,聚氨酯树脂的含量为60〜200质量份;条件2:颜料为无机颜料。在凹版印刷用有机溶剂类浓缩油墨组合物中,无机颜料的含量为5〜70质量%,聚氨酯树脂的含量为3〜20质量%。相对于100质量份无机颜料,聚氨酯树脂的含量为5〜60质量份。条件3:包括有机颜料和无机颜料的颜料;在用于凹版印刷的有机溶剂基浓缩油墨组合物中,有机颜料的量为5质量%至20质量%;有机颜料与无机颜料的质量比((无机颜料的质量)/(有机颜料的质量))满足0 <(无机颜料的质量)/(有机颜料的质量)<7.0。聚氨酯树脂的含量为3〜20质量%。相对于全部颜料100质量份,聚氨酯树脂的量为20〜200质量份。
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