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US 2025/0082518 A1Published application
Liquid barrier and air-permeable backsheet
OwnerNaizhao Fang, Tianlei Zhang +1inventors
InventorsNaizhao Fang, Tianlei Zhang, Yongji Jin
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Abstract
Backsheets having a combination of desirable liquid barrier properties and air permeability are provided. The backsheets include outermost spunbond layers and two or more fine-fiber containing nonwoven layers.
Claims20
A backsheet, comprising:
- at least a first nonwoven fabric comprising—
- (i) a first outermost spunbond layer including a first plurality of continuous spunbond fibers;
- (ii) a second outermost spunbond layer including a second plurality of continuous spunbond fibers;
- (iii) a first fine-fiber containing layer including a first plurality of fine fibers;
- wherein the first fine-fiber containing layer is located proximately or adjacent to the first outermost spunbond layer;
- and
- (iv) a second fine-fiber containing layer including a second plurality of fine fibers;
- wherein the second fine-fiber containing layer is located proximately or adjacent to the second outermost spunbond layer and adjacent to the first fine-fiber containing layer;
- wherein a total amount of fine fibers comprising the first plurality of fine fibers and the second plurality of fine fibers account for about 15 to about 40% by weight of the first nonwoven fabric.
6 more elements
A method of making a backsheet, comprising:
- (i) forming at least a first nonwoven fabric comprising—
- (a) providing or forming a first outermost spunbond layer including a first plurality of continuous spunbond fibers;
- (b) providing or forming a second outermost spunbond layer including a second plurality of continuous spunbond fibers;
- (c) providing or forming a first fine-fiber containing layer including a first plurality of fine fibers;
- (d) providing or forming a second fine-fiber containing layer including a second plurality of fine fibers;
- (e) positioning the first fine-fiber containing layer proximately or adjacent to the first outermost spunbond layer, and positioning the second fine-fiber containing layer is proximately or adjacent to the second outermost spunbond layer and adjacent to the first fine-fiber containing layer to form a first intermediate material;
- and
- (f) consolidating the first intermediate material to form a backsheet.
5 more elements
Dependencies are inferred from the claim text.