White resin film with excellent printability
AssigneeOji Yuka Goseishi Co., Ltd.
InventorsMasayuki Inoue, Mitsuo Nakajima
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Abstract
A white resin film having microvoids is disclosed, which is obtained by stretching a thermoplastic resin film comprising (a) from 40 to 65% by weight of a polypropylene resin, (b) from 1 to 20% by weight of ground calcium carbonate having a particle size of from 1 to 6 .mu.m and a specific surface area of from 10,000 to 34,800 cm.sup.2 /g, and (c) from 30 to 50% by weight of precipitated calcium carbonate having a particle size of not smaller than 0.5 .mu.m and a specific surface area of from 35,000 to 50,000 cm.sup.2 /g so as to have a void volume of from 20 to 70%. The film exhibits satisfactory printability in terms of whiteness and ink drying properties.
Claims12
A white resin film having microvoids which is obtained by stretching a thermoplastic resin film comprising (a) from 40 to 65% by weight of a polypropylene resin, (b) from 1 to 20% by weight of ground calcium carbonate having a particle size of from 1 to 6 .mu.m, and (c) from 30 to 50% by weight of precipitated calcium carbonate having a particle size of not smaller than 0.5 .mu.m, wherein the total amount of said ground calcium carbonate (b) and said precipitated calcium carbonate (c) is not more than 60% by weight.
Dependencies are inferred from the claim text.