Anti-microbial carpet underlay and method of making
AssigneeL&P Property Management Company
InventorsStephen D. Gilder, Martin J. Lovato, William A. Griggs
Life of this patent
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Abstract
A method for making antimicrobial rebonded carpet pad includes mixing zinc pyrithione with a polyol to form an antimicrobial polyol mixture concentrate, blending the antimicrobial polyol mixture concentrate with a binder stream, mixing the binder with foam particles and curing the binder. The percentage of zinc pyrithione mixed with the polyol and the addition ratio of the antimicrobial polyol mixture concentrate with the binder stream are selected to provide an overall concentration of zinc pyrithione in the binder of at least about 7500 ppm. The particles and binder are cured into a block and sliced to form carpet pad.
Claims17
A carpet underlay for use beneath carpeting comprising a pad comprising:
- foam particles bound together with a binder comprising an effective amount of an anti-microbial compound;
- and
- a 0.45 to 0.5 mil monolayer blown film laminated to the pad;
- wherein the anti-microbial compound of the binder comprises zinc pyrithione;
- and
- wherein the film comprises an effective amount of an anti-microbial compound.
A carpet underlay consisting of:
- a rebonded pad;
- and
- a film laminated to the pad, wherein:
- the pad consists of foam particles bound together with a binder comprising an effective amount of zinc pyrithione anti-microbial compound;
- and
- the pad has a thickness between about ⅜ inch and ⅝ inch;
- wherein:
- the film has an effective amount of zinc pyrithione anti-microbial compound;
- the pad has between about 750 ppm and about 1100 ppm zinc pyrithione;
- the film has between about 500 ppm and about 850 ppm zinc pyrithione;
- and
- the total concentration of zinc pyrithione in the carpet underlay is between about 1600 ppm and about 1950 ppm.
A carpet underlay having a first side and a second side comprising:
- a foam pad having a first side and a second side, and
- a laminating film comprising an effective amount of an anti-microbial compound, the laminating film having a first side and a second side, the laminating film second side laminated to the foam pad first side,
- wherein the laminating film first side forms the carpet underlay first side and the foam pad second side forms the carpet underlay second side, and wherein the antimicrobial compound comprises zinc pyrithione;
- and
- wherein the laminating film comprises at least about 500 ppm of zinc pyrithione;
- and
- wherein the foam pad comprises foam particles bound together with a binder comprising an effective amount of an anti-microbial compound, wherein the anti-microbial compound comprises zinc pyrithione.
Dependencies are inferred from the claim text.