Selective layering of superabsorbents in meltblown substrates

Patent 4724114 Issued on February 9, 1988. Estimated Expiration Date:

October 2, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Nonwoven fabric and method of producing same
Patent #: 4100324
Issued on: 07/11/1978
Inventor: Anderson , et al.

Pillowed web of blown microfibers
Patent #: 4103058
Issued on: 07/25/1978
Inventor: Humlicek

Powdered grafted cellulose
Patent #: 4105033
Issued on: 08/08/1978
Inventor: Chatterjee , et al.

Absorbent material
Patent #: 4297410
Issued on: 10/27/1981
Inventor: Tsuchiya , et al.

Absorbent product to absorb fluids
Patent #: 4338371
Issued on: 07/06/1982
Inventor: Dawn , et al.

Sheet product containing sorbent particulate material
Patent #: 4429001
Issued on: 01/31/1984
Inventor: Kolpin , et al.

Reduced-stress vapor-sorptive garments
Patent #: 4433024
Issued on: 02/21/1984
Inventor: Eian

Superthin absorbent product Patent #: 4500315
Issued on: 02/19/1985
Inventor: Pieniak , et al.

Inventors

Assignee

Kimberly-Clark Corporation

Application

No. 06/914708 filed on 10/02/1986

US Classes:

264/510, Producing multilayer work or article264/113, Plural layers formed by uniting randomly associated particles264/119, With reshaping or surface embossing of formed article264/518Continuous or indefinite length

Examiners

Primary: Silbaugh, Jan H.
Assistant: Fertig, Mary Lynn

Attorney, Agent or Firm

International Classes

A61F 13/15 (20060101)
D04H 1/56 (20060101)

Abstract

The invention generally provides for formation of meltblown material containing wood fiber on to a continuous foraminous belt. During formation a polymer and wood fiber first layer is applied to a moving belt from at least one bank of meltblown forming apparatus. This first layer does not contain superabsorbent. The belt carrying the first layer passes beneath at least one further source of meltblown fiber into which superabsorbent is added along with the wood fibers. This provides at least one additional layer integrally connected to the first-formed layer and having superabsorbent properties. The first layer acts to aid in trapping of any superabsorbent which is not immediately entangled in the meltblown and wood fibers and prevents it passing through the forming belt.