Saccharide fatty acid ester inorganic particle combinations
The present disclosure describes methods of treating cellulosic materials with compositions that allow greater retention of inorganic particles on cellulosic substrates. The methods as disclosed provide combining saccharide fatty acid esters (SFAE) with such inorganic particles and applying such combinations on cellulosic materials to eliminate or reduce the use of retention aids or binders for filler in the paper making process. Compositions comprising such combinations of SFAE and inorganic particles are also disclosed.
1. An aqueous composition, comprising:
water;
one or more saccharide fatty acid esters (SFAE); and
inorganic particles,
wherein said one or more SFAE is present in said aqueous composition at a sufficient concentration to cause the inorganic particles to adhere to a cellulose based substrate,
wherein said substrate containing said SFAE-adhered inorganic particles exhibits greater water resistance and/or grease resistance compared to said substrate containing only said inorganic particles alone or only said one or more SFAE alone, and
wherein said aqueous composition does not include casein.
2. The aqueous composition of claim 1 , wherein the SFAE comprises all unsaturated fatty acids, all saturated fatty acids or a mixture of saturated and unsaturated fatty acids, and optionally, further comprises one or more binders selected from polyvinyl hydroxide (PvOH) or starch.
3. The aqueous composition of claim 1 , wherein said one or more SFAE is a mixture of two or more different SFAEs, and wherein said two or more different SFAEs comprise all saturated fatty acids.
4. The aqueous composition of claim 1 , wherein said inorganic particles are selected from the group consisting of clay, ground calcium carbonate, precipitated calcium carbonate, talc, titanium dioxide and combinations thereof, and wherein said inorganic particles comprise at least 1% of the composition on a dry basis (db).
5. The aqueous composition of claim 4 , wherein said inorganic particles are calcium carbonate particles, and wherein said substrate containing said SFAE-adhered inorganic particles exhibits water resistance.
6. The aqueous composition of claim 4 , wherein said inorganic particles are clay particles, and wherein said substrate containing said SFAE-adhered inorganic particles exhibits grease resistance.
7. The aqueous composition of claim 1 , wherein said one or more SFAE contains at least one saccharide and at least one aliphatic group comprising 8 to 30 carbons.
8. The aqueous composition of claim 1 , wherein said cellulose based substrate is selected from the group consisting of paper, paperboard, paper pulp, a food storage carton, a food storage bag, a shipping bag, a coffee or tea container, a tea bag, bacon board, diapers, weed-block/barrier fabric or film, mulching film, plant pots, packing beads, bubble wrap, oil absorbent material, laminates, envelops, gift cards, credit cards, gloves, raincoats, OGR paper, a shopping bag, a compost bag, release paper, eating utensil, a hot or cold beverage container, cup, paper towels, plate, a carbonated liquid storage bottle, insulating material, a non-carbonated liquid storage bottle, wrapping food film, a garbage disposal container, a food handling implement, a cup lid, a screw on cup lid of moldable paper, paper straws, a fabric fibre, a water storage and conveying implement, medical use paperboard, release paper, an alcoholic or non-alcoholic drink storage and conveying implement, casing, an electronic good outer screen, an internal or external piece of furniture, a curtain, upholstery, film, box, sheet, tray, pipe, water conduit, pharmaceutical product packaging, clothing, medical device, contraceptive, camping equipment, molded cellulosic fiber material and combinations thereof.
9. A method of treating a cellulosic substrate with said aqueous composition according to claim 1 , the method comprising:
a) mixing at least one saccharide fatty acid ester (SFAE) with inorganic particles, water, and optionally one or more binders to form said aqueous composition;
b) applying said aqueous composition to at least one surface of said cellulosic substrate; and
c) curing for a sufficient time to allow said composition to adhere to the at least one surface to obtain at least one treated surface of said cellulosic substrate.
10. The method of claim 9 , wherein said at least one treated cellulosic surface is hydrophobic.
11. The method of claim 9 , wherein said at least one treated cellulosic surface is lipophobic.
12. The method of claim 9 , wherein said at least one SFAE comprises all saturated fatty acids or a mixture of saturated and unsaturated fatty acids.
13. The method of claim 9 , wherein said at least one SFAE is a mixture of two or more different SFAEs.
14. The method of claim 9 , wherein said inorganic particles are selected from the group consisting of clay, ground calcium carbonate, precipitated calcium carbonate, talc, titanium dioxide and combinations thereof, wherein the inorganic particles are present in the mixture at a concentration of at least about 1% on a dry basis (db).
15. The method of claim 14 , wherein the composition further comprises polyvinyl alcohol or starch.
16. The method of claim 14 , wherein the calcium carbonate is precipitated calcium carbonate.
17. The method of claim 9 , wherein the inorganic particles comprise calcium carbonate, and wherein the calcium carbonate comprises greater than or equal to about 50% of the mixture on a dry basis (db).
18. The method of claim 9 , wherein the cellulosic substrate is selected from the group consisting of paper, paperboard, paper pulp, a food storage carton, a food storage bag, a shipping bag, a coffee or tea container, a tea bag, bacon board, diapers, weed-block/barrier fabric or film, mulching film, plant pots, packing beads, bubble wrap, oil absorbent material, laminates, envelops, gift cards, credit cards, gloves, raincoats, OGR paper, a shopping bag, a compost bag, release paper, eating utensil, a hot or cold beverage container, cup, paper towels, plate, a carbonated liquid storage bottle, insulating material, a non-carbonated liquid storage bottle, wrapping food film, a garbage disposal container, a food handling implement, a cup lid, a screw on cup lid of moldable paper, paper straws, a fabric fibre, a water storage and conveying implement, medical use paperboard, release paper, an alcoholic or non-alcoholic drink storage and conveying implement, casing, an electronic good outer screen, an internal or external piece of furniture, a curtain, upholstery, film, box, sheet, tray, pipe, water conduit, pharmaceutical product packaging, clothing, medical device, contraceptive, camping equipment, molded cellulosic fiber material and combinations thereof.
19. The composition of claim 1 , wherein at least one of said one or more SFAE has an HLB value greater than 7.
20. The composition of claim 1 , wherein at least one of said one or more SFAE has an HLB value of equal to or greater than 9.
21. An article of manufacture, comprising:
a cellulose based substrate; and
a coating on a surface of the cellulose based substrate, the coating containing one or more saccharide fatty acid esters (SFAE), inorganic particles, and optionally, one or more binders,
wherein the cellulose based substrate consists essentially of cellulose,
wherein the inorganic particles are adhered to the surface of the cellulose substrate by the one or more SFAE,
wherein the inorganic particles are present in the coating at a concentration of at least 1% on a dry basis (db),
wherein the coating provides the substrate with increased water resistance and/or grease resistance compared to if the substrate was coated with only the one or more SFAE alone or the inorganic particles alone, and
wherein the coating does not include casein.
22. The article of manufacture of claim 21 , wherein the cellulose based substrate is selected from the group consisting of paper, paperboard, paper pulp, a food storage carton, a food storage bag, a shipping bag, a coffee or tea container, a tea bag, bacon board, diapers, weed-block/barrier fabric or film, mulching film, plant pots, packing beads, bubble wrap, oil absorbent material, laminates, envelops, gift cards, credit cards, gloves, raincoats, OGR paper, a shopping bag, a compost bag, release paper, eating utensil, a hot or cold beverage container, cup, paper towels, plate, a carbonated liquid storage bottle, insulating material, a non-carbonated liquid storage bottle, wrapping food film, a garbage disposal container, a food handling implement, a cup lid, a screw on cup lid of moldable paper, paper straws, a fabric fibre, a water storage and conveying implement, medical use paperboard, release paper, an alcoholic or non-alcoholic drink storage and conveying implement, casing, an electronic good outer screen, an internal or external piece of furniture, a curtain, upholstery, film, box, sheet, tray, pipe, water conduit, pharmaceutical product packaging, clothing, medical device, contraceptive, camping equipment, molded cellulosic fiber material and combinations thereof.