Laminates of elastomeric and non-elastomeric polyolefin blend materials

US8314040B2 · kind B2 · utility

Assignee

• Kimberly-Clark Worldwide, Inc. · US

Inventors

• C. Allen Smith · Cumming, US
• Kenneth B. Close · New London, US
• Richard C. Beck · Solgohachia, US
• Jay Sheldon Shultz · Roswell, US
• David J. Baer · Auburn, US
• Susan Elaine Shawver · Roswell, US
• Paul Windsor Estey · Cumming, US
• Deepak R. Parikh · Lake Jackson, US
• Kenneth Stewart · Lake Jackson, US

Key dates

• Filing date: Nov 12, 2003
• Grant date: Nov 20, 2012
• Expiry date: Mar 22, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/697
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A nonwoven web made from a polymeric fiber blend comprising at least one elastomeric polyolefin and at least one nonelastomeric polyolefin useful as the elastic base sheet for a nonwoven laminate is disclosed. Preferably, the polymeric blend will comprise a nonelastomeric resin in the range of from about 10 to about 90 percent by weight, and an elastomeric resin of from about 90 to about 10 percent by weight. The elastomeric polyolefin will have a density of less than about 0.885 g/cm3 and the nonelastomeric polyolefin will have a density of at least about 0.890 g/cm3. In one particular embodiment, the polymeric blend may comprise about 50 percent to about 90 percent by weight of a narrow molecular weight distribution polyethylene and about 50 percent to about 10 percent by weight of a nonelastomeric polyolefin such as a linear low density polyethylene.