Coating composition for a fibrous nonwoven sheet of polyolefin

A coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties, said composition consisting essentially of

• (a) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20.degree.-50.degree. C and which, in the form of an aqueous dispersion, does not coagulate in the presence of component (c), said binder resin being present in an amount of from about 40-80% by weight, based upon the weight of the composition when dried;
• (b) from about 15-40% by weight, based on the amount of binder resin, of a water-insoluble wax which is dispersible in water at a concentration of 10% by weight based on the total amount of wax and water, said wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, said nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10;
• (c) from about 5-15% by weight, based on the amount of binder resin, of an antistat having the formula M.sub.n R.sub.3-n PO.sub.4 where M is selected from the group consisting of lithium, sodium, potassium and ammonium ions, R represents an alkyl group containing from 3 to 5 carbon atoms, and n is selected from the integers 1 and 2;
• (d) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said surfactant being present in an amount of from about 15-100% by weight based on the amount of wax;
• and
• (e) water;
• solids being present in said composition in an amount of from about 10-40% by weight.