Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same
First Claim
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1. A paper or paperboard substrate, comprisinga plurality of cellulose fibers;
- from 0.1 to 5 wt % of a plurality of expandable microspheres;
wherein the substrate has a Sheffield smoothness of less than 250 SU as measured by TAPPI test method T 538 om-1;
a basis weight of 20 to 70 lbs/3000 square foot; and
a scanning 2nd cyan print mottle of not more than 6, and further comprising at least one ionic compound, wherein the ionic compound is adsorbed onto an outside surface of the expandable microspheres to form particles comprising said expandable microspheres having the ionic compound layered thereon.
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Abstract
This invention relates to composition containing expandable microspheres and at least one ionic compound and having a zeta potential that is greater than or equal to zero mV at a pH of about 9.0 or less at an ionic strength of from 10−6 M to 0.1M, as well as methods of making and using the composition.
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27 Claims
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1. A paper or paperboard substrate, comprising
a plurality of cellulose fibers; -
from 0.1 to 5 wt % of a plurality of expandable microspheres;
wherein the substrate has a Sheffield smoothness of less than 250 SU as measured by TAPPI test method T 538 om-1;a basis weight of 20 to 70 lbs/3000 square foot; and a scanning 2nd cyan print mottle of not more than 6, and further comprising at least one ionic compound, wherein the ionic compound is adsorbed onto an outside surface of the expandable microspheres to form particles comprising said expandable microspheres having the ionic compound layered thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification