Cooling substrates with hydrophilic containment layer and method of making

摘要

Wiping products, such as facial tissues, contain an interior temperature change composition and an exterior hydrophilic lotion composition that can provide a cooling sensation when contacted with the skin of a user. The temperature change composition, for instance, can contain one or more phase change agents that undergo a phase change at slightly elevated temperatures. The phase change agents, in one embodiment, can have a relatively high heat of fusion. When undergoing a phase change, the phase change agents absorb heat and thereby provide a cooling feeling to the skin of a user. The hydrophilic lotion composition may contain a carrier and a thermo-reversible gelling agent. The hydrophilic lotion composition maintains the temperature change composition within the tissue and helps to prevent skin irritation.

主权项

1. A method of making a dry substrate having a cooling sensation comprising:
providing a first web comprised of fibers, the first web having a first side and a second side; providing a second web comprised of fibers, the second web having a first side and a second side, the first web and the second web each having a basis weight of from about 5 to about 60 grams per square meter; applying a temperature change composition on the first side of the first web and the first side of the second web, wherein the temperature change composition comprises a phase change agent that undergoes a phase change at a temperature from about 20° C. to about 35° C., the phase change agent having a heat of fusion of at least about 100 J/g and being present on the dry substrate such that the substrate has a heat absorption factor of at least about 500 J/m2; applying a hydrophilic lotion composition on the second side of the first web and the second side of the second web, wherein the hydrophilic lotion comprises a carrier present in an amount between about 1% by the weight of the hydrophilic lotion composition and about 99.9% by the weight of the hydrophilic lotion composition and a thermo-reversible gelling agent present in an amount between about 0.1% by the weight of the hydrophilic lotion composition and about 50% by the weight of the hydrophilic lotion composition; winding the first web and second web together to form a combined web so that the first side of the first web is facing the first side of the second web and the temperature change composition is between the first web and the second web; calendering the combined web; and crimping the first web to the second web.