Elastic laminate including nonwoven layer formed from highly-oriented-component fibers and disposable garment employing the same
First Claim
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1. An elastic laminate elastically extensible in at least one direction, comprising:
- (a) an elastomeric layer having a first surface and a second surface opposing the first surface;
wherein the elastomeric layer is in a form selected from the group consisting of a scrim, an apertures formed film, an elastomeric woven or nonwoven, discrete strands and strings;
wherein the elastomeric woven or nonwoven and discrete strand and strings comprise a polystyrene thermoplastic elastomer selected from the group consisting of a styrene-butadiene-styrene thermoplastic elastomer, a styrene-isoprene-styrene thermoplastic elastomer, a styrene-ethylene/butylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene thermoplastic elastomer, a hydrogenated styrene butadiene rubber, and a mixture thereof; and
(b) a first nonwoven layer joined to the first surface of the elastomeric layer, the first nonwoven layer being formed from component fibers having a primary fiber direction;
wherein the first nonwoven layer has a Fiber Orientation Ratio within about ±
20 degrees from a primary fiber direction of at least about 65%;
wherein the elastic laminate exhibits elasticity without mechanical stretching of the first nonwoven layer during manufacture.
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Abstract
The present invention is directed to an elastic laminate which is elastically extensible in at least one direction. The elastic laminate includes an elastomeric material having a first surface and a second surface opposing the first surface; and a first nonwoven layer joined to the first surface of the elastomeric material. The first nonwoven layer is formed from component fibers having a primary fiber direction. The first nonwoven layer has a Fiber Orientation Ratio within about ±20 degrees from a primary fiber direction of at least about 65%. The present invention is also directed to a disposable garment employing such an elastic laminate.
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Citations
19 Claims
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1. An elastic laminate elastically extensible in at least one direction, comprising:
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(a) an elastomeric layer having a first surface and a second surface opposing the first surface;
wherein the elastomeric layer is in a form selected from the group consisting of a scrim, an apertures formed film, an elastomeric woven or nonwoven, discrete strands and strings;
wherein the elastomeric woven or nonwoven and discrete strand and strings comprise a polystyrene thermoplastic elastomer selected from the group consisting of a styrene-butadiene-styrene thermoplastic elastomer, a styrene-isoprene-styrene thermoplastic elastomer, a styrene-ethylene/butylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene thermoplastic elastomer, a hydrogenated styrene butadiene rubber, and a mixture thereof; and
(b) a first nonwoven layer joined to the first surface of the elastomeric layer, the first nonwoven layer being formed from component fibers having a primary fiber direction;
wherein the first nonwoven layer has a Fiber Orientation Ratio within about ±
20 degrees from a primary fiber direction of at least about 65%;
wherein the elastic laminate exhibits elasticity without mechanical stretching of the first nonwoven layer during manufacture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A disposable garment having a front region, a back region and a crotch region between the front region and the back region, comprising:
- a chassis provided in the front, back and crotch regions and having edge lines in the front and back regions, the chassis comprising a liquid pervious topsheet, a liquid impervious backsheet associated with the topsheet, and an absorbent core disposed between the topsheet and the backsheet; and
at east one pair of extensible side panels extending laterally outward from the chassis in the font or back region, wherein at least one of the side panels including an elastic laminate elastically extensible at least in the lateral direction, the elastic laminate including;(a) an elastomeric layer having a first surface and a second surface opposing the first surface;
wherein the elastomeric layer is in a form selected from the group consisting of a scrim, an apertures formed film, an elastomeric woven or nonwoven, discrete strands and strings;
wherein the elastomeric woven or nonwoven and discrete strand and strings comprise a polystyrene thermoplastic elastomer selected from the group consisting of a styrene-butadiene-styrene thermoplastic elastomer, a styrene-isoprene-styrene thermoplastic elastomer, a styrene-ethylene-butylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene thermoplastic elastomer, a hydrogenated styrene butadiene rubber, and a mixture thereof; and
(b) a first nonwoven layer joined to the first surface of the elastomeric layer, the first nonwoven layer being formed from component fibers having a primary fiber direction;
wherein the first nonwoven layer has a Fiber Orientation Ratio within about ±
20 degrees from a primary fiber direction of at least about 65%;
wherein the elastic laminate exhibits elasticity without mechanical stretching of the first nonwoven layer during manufacture. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
- a chassis provided in the front, back and crotch regions and having edge lines in the front and back regions, the chassis comprising a liquid pervious topsheet, a liquid impervious backsheet associated with the topsheet, and an absorbent core disposed between the topsheet and the backsheet; and
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11. A disposable garment having a longitudinal center line, longitudinal edges, end edges, a front region, a back region and a crotch region between the front region and the back region, comprising:
- a chassis provided in the front, back and crotch regions and having edge lines in the front and back regions, the chassis comprising a liquid pervious topsheet, a liquid impervious backsheet associated with the topsheet, and an absorbent core disposed between the topsheet and the backsheet; and
a waistband disposed along at least one of the end edges of the disposable garment, wherein the waistband includes an elastic laminate including(a) an elastomeric layer having a first surface and a second surface opposing the first surface;
wherein the elastomeric layer is in a form selected from the group consisting of a scrim, an apertures formed film, an elastomeric woven or nonwoven, discrete strands and strings;
wherein the elastomeric woven or nonwoven and discrete strands and strings comprise a polystyrene thermoplastic elastomer selected from the group consisting of a styrene-butadiene-styrene thermoplastic elastomer, a styrene-isoprene-styrene thermoplastic elastomer, a styrene-ethylene/butylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene-styrene thermoplastic elastomer, a styrene-ethylene/propylene thermoplastic elastomer, a hydrogenated styrene butadiene rubber, and a mixture thereof; and
(b) a first nonwoven layer joined to the first surface of the elastomeric layer, the first nonwoven layer being formed from component fibers having a primary fiber direction;
wherein the first nonwoven layer has a Fiber Orientation Ratio within about ±
20 degrees from a primary fiber direction of at least about 65%;
wherein the elastic laminate exhibits elasticity without mechanical stretching of the first nonwoven layer during manufacture.
- a chassis provided in the front, back and crotch regions and having edge lines in the front and back regions, the chassis comprising a liquid pervious topsheet, a liquid impervious backsheet associated with the topsheet, and an absorbent core disposed between the topsheet and the backsheet; and
Specification