Thermoplastic article with thermal active agent
AssigneeKimberly-Clark Worldwide, Inc.
InventorsPeiguang Zhou, David Gerard Iwanski, Gary Alan Turchan, Andrew Mark Long
Life of this patent
Estimating the term…
Abstract
An extruded water-soluble article includes a water-soluble polymer having an extrusion temperature of 90 to 150 C., a plasticizer, and one or more active agents in a total amount of 0.1% to 50% by weight of the article. Combining the active agent(s) with a plasticizer prior to melt-blending with the water-soluble polymer prevents phase separation of the active agent and the polymer. Articles include films, fibers, rods, bars and the like. Such articles may be placed in an absorbent article such as a bandage, a medical drape, a wipe, a sheet, a diaper, a pant, or a pad.
Claims20
An extruded water-soluble article comprising:
- a water-soluble, polymer having an extrusion temperature of 90 to 150° C.;
- a plasticizer;
- and
- one or more thermal active agents in a total amount of 0.1% to 50% by weight of the article, wherein
- the one or more thermal active agents are completely dissolvable/dispersible in the plasticizer;
- wherein the combination of the one or more thermal active agents and the plasticizer is a homogeneous mixture/solution;
- and
- wherein a homogeneous blend, comprising the polymer and the homogeneous mixture/solution, has an extrusion temperature of 50 to 125° C.
A personal absorbent article comprising:
- an absorbent member sandwiched between a water-impermeable backsheet and a water-permeable liner, wherein the liner has a body-facing surface and an opposite outward-facing surface;
- and
- a film attached to either the outward-facing surface of the liner or a surface of the absorbent member that is adjacent the liner, wherein the film comprises:
- a water-soluble, polymer having an extrusion temperature of 90 to 150° C.;
- a plasticizer;
- and one or more thermal active agents in a total amount of 0.1% to 50% by weight of the article, wherein the one or more thermal active ingredients are dissolvable/dispersible in the plasticizer;
- wherein the combination of the one or more thermal active agents and the plasticizer is a homogeneous mixture/solution;
- and wherein a homogeneous blend comprising the polymer and the homogeneous mixture/solution has an extrusion temperature of 50 to 125° C.
A method of making an extruded article comprising the following steps:
- a) prepare a mixture/solution comprising a thermoplastic plasticizer and one or more thermal active agents;
- b) form a homogenous blend having an extrusion and a processing temperature of 90 to 125° C., the homogeneous blend comprising the mixture/solution and an amorphous, water-soluble polyvinyl alcohol, wherein the homogeneous blend comprises 0.1% to 40% by weight of the one or more thermal active agents;
- and
- c) extrude the homogeneous blend to form a film.
Dependencies are inferred from the claim text.