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EP0220640A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Lightweight nonwoven tisue and method of manufacture

Assignee: Kimberly Clark Corp
•
Filing: 1986-10-20
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Granted: —
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Expires: 2006-10-20
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Abstract

Abstract Tissue (58) comprising a matrix of nonwoven fibers (60) having a basis weight generally in the range of about 25 to 50 gsm. The matrix is a meltblown web having incorporated therein staple fibers (62), for instance hardwood fibers. The combination provides highly-improved tissue properties as well as strength and absorbency required for many tissue applications. The tissues may be formed by a conventional meltblowing process involving extrusion of a thermoplastic polymer as a filament in air streams which draw and attenuate the filaments to fine fibers, having an average diameter of up to about 10 microns. The staple fibers may be added to the air stream, and the turbulence produced where the air streams meet results in a uniform integration of the staple fibers into the meltblown web. The matrix may contain from about 30 to about 80 weight percent polymer and have a subjective softness rating of at least about 10.

Inventors

  • 👤 William D. Lloyd
  • 👤 Maung Hla Win
  • 👤 Dennis E. Malueg

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 05:44
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24595; Y10T428/24603; Y10T428/27

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 40 words
An improved nonwoven tissue comprising a matrix of fibers having a total basis weight ranging from about 20 to about 50 g/m² and comprising thermoplastic microfibers and cellulosic fibers, said microfibers comprising from about 30 to about 80 weight percent.
Claim 2
Dependent Claim 40 words
An improved nonwoven tissue comprising a matrix of fibers having a total basis weight ranging from about 20 to about 50 g/m² and comprising thermoplastic microfibers and cellulosic fibers, said microfibers comprising from about 30 to about 80 weight percent.
Claim 3
Dependent Claim 17 words
The tissue of claim 1 wherein said microfibers comprise from about 40 to about 60 weight percent.
Claim 4
Dependent Claim 24 words
The tissue of claim 1 wherein said tissue comprises a total basis weight of from about 25 to about 30 grams per square meter.
Claim 5
Dependent Claim 19 words
The tissue of claim 1 wherein said cellulosic fibers have a coarseness coefficient below about 20 milligrams per meter.
Claim 6
Dependent Claim 20 words
The tissue of claim 4 wherein said cellulosic fibers have a coarseness coefficient below about 15 milligrams per square meter.
Claim 7
Dependent Claim 20 words
The tissue of claim 1 wherein said tissue is embossed from about 15% to about 35% of its surface area.
Claim 8
Dependent Claim 28 words
The tissue of claim 1 wherein said tissue is embossed with a fabric line pattern having a frequency of from about 15 to about 150 lines per inch.
Claim 9
Dependent Claim 12 words
The tissue of claim 1 wherein said tissue consists of one ply.
Claim 10
Dependent Claim 12 words
The tissue of claim 1 wherein said cellulosic fibers comprise hardwood fibers.
Claim 11
Dependent Claim 17 words
The tissue of claim 1 wherein said tissue has a Softness Test Rating of at least 8.
Claim 12
Dependent Claim 17 words
The tissue of claim 12 wherein said tissue has a Softness Test Rating of at least 9.5.
Claim 13
Dependent Claim 15 words
The tissue of claim 1 having an Invariant Tensile Energy Absorption of at about 15.
Claim 14
Dependent Claim 16 words
The tissue of claim 10 having an Invariant Tensile Energy Absorption of at least about 20.
Claim 15
Dependent Claim 16 words
The tissue of Claim 11 having an Invariant Tensile Energy Absorption of at least about 30.
Claim 16
Dependent Claim 19 words
The tissue of claim 1 wherein said thermoplastic microfibers are selected from a group consisting of polyethylene and polypropylene.
Claim 17
Dependent Claim 33 words
The tissue of claim 1 wherein said tissue is embossed over about 20% to about 30% of its surface with embossed points frequency of about 250 to about 5,000 points per square inch.
Claim 18
Dependent Claim 17 words
The tissue of claim 1 wherein said tissue comprises from about 0.15% to 1% by weight surfactant.

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