Conjugate fiber nonwoven fabric

• US 5,545,464 A
• Filed: 03/22/1995
• Issued: 08/13/1996
• Est. Priority Date: 03/22/1995
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Corporation
• Inventors: Stokes, Ty J.
• Primary Examiner(s): CANNON, JAMES
• Application Number:
  US08/408,458
• Time in Patent Office: 510 Days
• Field of Search: 2/2, 2/114, 2/901, 428/198, 428/221, 428/311.1, 428/373, 428/296, 128/849
• US Class Current: 428/198
• CPC Class Codes: D04H 1/5412 sheath-core
• CPC Class Codes: D04H 1/5416 sea-island
• CPC Class Codes: Y10S 2/901 Antibacterial, antitoxin, or clean room
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 428/249921 Web or sheet containing structurally defined element or component
• CPC Class Codes: Y10T 428/2929 Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
• CPC Class Codes: Y10T 442/637 Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
• CPC Class Codes: Y10T 442/64 Islands-in-sea multicomponent strand or fiber material
• CPC Class Codes: Y10T 442/641 Sheath-core multicomponent strand or fiber material

Abstract

The present invention provides a pattern bonded nonwoven fabric containing conjugate fibers. The conjugate fibers contain a higher melting component polymer and a lower melting component polymer, wherein the higher melting component polymer envelopes the lower melting component polymer and forms the peripheral surface along the length of the fibers. The present invention also provides articles produced from the conjugate fiber fabric.

Claims

1. A pattern bonded nonwoven fabric comprising conjugate fibers, said conjugate fibers comprising a higher melting point component polymer and a lower melting point component polymer, wherein said higher melting component polymer envelops said lower melting component polymer and forms the peripheral surface along the length of said fibers.

2. The nonwoven fabric of claim 1 wherein said conjugate fibers have a conjugate fiber configuration selected from sheath/core and island-in-sea configurations.

3. The nonwoven fabric of claim 2 wherein said conjugate fibers have a sheath/core configuration.

4. The nonwoven fabric of claim 1 wherein said higher melting polymer is selected from olefin polymers, polyamides, polyesters and blends thereof;

and said lower melting polymer is selected from olefin polymers.

5. The nonwoven fabric of claim 2 wherein said conjugate fibers are spunbond fibers.

6. A bonded nonwoven fabric comprising conjugate fibers, said conjugate fibers comprising a higher melting point component polymer, which is selected from olefin polymers, polyamides, polyesters and blends thereof;

and a lower melting point component polymer, which is selected from olefin polymers, wherein said higher melting component polymer envelops said lower melting component polymer and forms the peripheral surface along the length of said fibers, and said nonwoven fabric is pattern bonded.

7. The nonwoven fabric of claim 6 wherein said conjugate fibers have a conjugate fiber configuration selected from sheath/core and island-in-sea configurations.

8. The nonwoven fabric of claim 7 wherein said conjugate fibers have a sheath/core configuration.

9. The nonwoven fabric of claim 6 wherein said conjugate fibers are spunbond fibers.

10. The nonwoven fabric of claim 6 wherein said olefin polymers are selected from polyethylene, polypropylene, polybutylene, and blends and copolymers thereof.

11. The nonwoven fabric of claim 6 wherein said higher melting polymer and lower melting polymer are selected from olefin polymers.

12. The nonwoven fabric of claim 11 wherein said higher melting polymer is polypropylene and lower melting polymer is polyethylene.

13. The nonwoven fabric of claim 11 wherein said conjugate fibers comprise up to about 85% of said lower melting polymer based on the total weight of said fibers.

14. A disposable article comprising a pattern bonded nonwoven fabric comprising conjugate fibers, said conjugate fibers comprising a higher melting point component polymer, which is selected from olefin polymers, polyamides, polyesters and blends thereof;

and a lower melting point component polymer, which is selected from olefin polymers, wherein said higher melting component polymer envelopes said lower melting component polymer and forms the peripheral surface along the length of said fibers.

15. The disposable article of claim 14 wherein said conjugate fibers have a sheath/core configuration and are spunbond fibers.

16. The disposable article of claim 14 wherein said olefin polymers are selected from polyethylene, polypropylene, polybutylene, and blends and copolymers thereof.

17. The disposable article of claim 14 wherein said higher melting polymer and lower melting polymer are selected from olefin polymers.

18. The disposable article of claim 14 wherein said higher melting polymer is polypropylene and lower melting polymer is polyethylene.

19. The disposable article of claim 14 is a surgical drape, a liner, or a disposable garment.

20. The disposable article of claim 19 is a disposable garment selected from examining gowns, surgical gowns and protective garments.