Unitized cover and transfer layer and process for making the same
The present invention is directed to an unitized cover and transfer layer for hygiene applications that have the appearance, strength, and drape of a nonwoven and the surface characteristics of a film. The lightweight apertured film surface the present invention is comprised of a series of void spaces that act to collect liquids and channel such liquid into an associated underlying absorbent layer, while reducing potential release of particulates inherent to the absorbent layer. Further, the unitized cover and transfer layer of the present invention exhibits significantly reduced frictional noise and discomfort induced by prolonged contact.
1 . A lightweight unitized cover and transfer layer construct for use in an absorbent article, wherein said construct comprises a layer of polyolefinic apertured film having a basis weight equal to or less than 20 gsm and a fibrous or filamentary web layer in a range between 7-30 grams per square meter.
2 . A lightweight unitized cover and transfer layer construct as in claim 1 , wherein said polyolefinic film is selected from the group consisting of isotactic polypropylene, linear low-density polyethylene, low-density polyethylene, high-density polyethylene, medium low-density polyethylene, very low-density polyethylene amorphous polypropylene, polyethylene copolymers, polypropylene copolymers, polybutylene, ethylene/vinyl acetate copolymer, ethylene/ethyl acrylate copolymer, ethylene/methyl acrylate copolymer, polystyrene, plastomers, and the combination thereof.
3 . A sanitary napkin comprising a lightweight unitized cover and transfer layer construct, wherein said construct comprises a layer of polyolefinic apertured film having a basis weight equal to or less than 20 gsm and a fibrous or filamentary web layer in a range between 7-30 grams per square meter, an absorbent core, and a liquid impermeable backsheet.
4 . A diaper comprising a lightweight unitized cover and transfer layer construct, wherein said construct comprises a layer of polyolefinic apertured film having a basis weight equal to or less than 20 gsm and a fibrous or filamentary web layer in a range between 7-30 grams per square meter, an absorbent core, and a liquid impermeable backsheet.