Patent US4931355A successfully refreshed from Google Patents.
US4931355A
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Nonwoven fibrous hydraulically entangled non-elastic coform material and method of formation thereof
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1988-03-18
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Granted: 1990-06-05
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Expires: 2008-03-18
Abstract
Abstract Nonwoven fibrous non-elastic webs, reinforced nonwoven fibrous non-elastic webs and methods of forming the same are disclosed. The nonwoven fibrous non-elastic webs are a hydraulically entangled coform or admixture of non-elastic meltblown fibers and fibrous material, with or without particulate material. The fibrous material (e.g., non-elastic fibrous material) can be at least one of pulp fibers, staple fibers, meltblown fibers and continuous filaments. The use of meltblown fibers facilitates the hydraulic entangling, resulting in a high degree of entanglement and enabling the more effective use of shorter fibrous material. The hydraulic entangling technique provides a nonwoven fibrous material having increased web strength and allows for better control of other product attributes, such as absorbency, wet strength, printability and abrasion resistance. The coform can be hydraulically entangled with a reinforcing material, e.g., a melt-spun nonwoven, a scrim, screen, net, etc.
Inventors
- 👤 Fred R. Radwanski
- 👤 Lloyd E. Trimble
- 👤 Leon E. Chambers, Jr.
- 👤 Linda A. Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:30
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/02; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/492; D04H1/04; D04H1/26; D04H1/42; D04H1/4282; D04H1/4291; D04H1/495; D04H1/54; D04H1/56; D04H3/00; D04H3/08; D04H3/10; D04H3/11; D04H5/03; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/619; Y10T442/68; Y10T442/681
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
34 words
A nonwoven fibrous non-elastic web comprising a substantially homogeneous admixture of non-elastic meltblown fibers and at least one type of secondary fibers wherein said non-elastic meltblown fibers are hydraulically entangled with said secondary fibers.
Claim 2
Dependent Claim
34 words
A nonwoven fibrous non-elastic web comprising a substantially homogeneous admixture of non-elastic meltblown fibers and at least one type of secondary fibers wherein said non-elastic meltblown fibers are hydraulically entangled with said secondary fibers.
Claim 3
Dependent Claim
28 words
The nonwoven fibrous non-elastic web according to claim 1, wherein said secondary fibers are selected from the group including pulp fibers, staple fibers, meltblown fibers and continuous filaments.
Claim 4
Dependent Claim
42 words
The nonwoven fibrous non-elastic web according to claim 1, wherein said admixture comprises a coform web of non-elastic meltblown fibers and at least one type of secondary fibers selected from the group including pulp fibers, staple fibers, meltblown fibers and continuous filaments.
Claim 5
Dependent Claim
21 words
The nonwoven fibrous non-elastic web according to claim 2, wherein said admixture consists essentially of non-elastic meltblown fibers and pulp fibers.
Claim 6
Dependent Claim
32 words
The nonwoven fibrous non-elastic web according to claim 2, wherein said non-elastic meltblown fibers are made from a thermoformable material selected from the group, including polypropylene, polyethylene, polybutylene terephthalate and polyethylene terephthalate.
Claim 7
Dependent Claim
21 words
The nonwoven fibrous non-elastic web according to claim 2, wherein said admixture consists essentially of non-elastic meltblown fibers and staple fibers.
Claim 8
Dependent Claim
17 words
The nonwoven fibrous non-elastic web according to claim 6, wherein said staple fibers are natural staple fibers.
Claim 9
Dependent Claim
17 words
The nonwoven fibrous non-elastic web according to claim 6, wherein said staple fibers are synthetic staple fibers.
Claim 10
Dependent Claim
18 words
The nonwoven fibrous non-elastic web according to claim 2, wherein said admixtures consists essentially of non-elastic meltblown fibers.
Claim 11
Dependent Claim
22 words
The nonwoven fibrous non-elastic web according to claim 9, wherein said admixture consists essentially of non-elastic meltblown microfibers and non-elastic meltblown macrofibers.
Claim 12
Dependent Claim
18 words
The nonwoven fibrous non-elastic web according to claim 1, wherein said material has at least one patterned surface.
Claim 13
Dependent Claim
17 words
The nonwoven fibrous non-elastic web according to claim 1, wherein said admixture further comprises a particulate material.
Claim 14
Dependent Claim
17 words
The nonwoven fibrous non-elastic web according to claim 12, wherein said particulate material is a superabsorbent material.
Claim 15
Dependent Claim
21 words
The nonwoven fibrous non-elastic web according to claim 2, wherein said admixture consists essentially of non-elastic meltblown fibers and continuous filaments.
Claim 16
Dependent Claim
17 words
The nonwoven fibrous non-elastic web according to claim 14, wherein said continuous filaments are spunbound continuous filaments.
Claim 17
Dependent Claim
45 words
A nonwoven fibrous reinforced non-elastic web comprising: a substantially homogeneous coform web of: non-elastic meltblown fibers, and at least one type of secondary fibers, and a reinforcing material, wherein said non-elastic meltblown fibers, said secondary fibers and said reinforcing material are joined by hydraulic entangling.
Claim 18
Dependent Claim
45 words
A nonwoven fibrous reinforced non-elastic web comprising: a substantially homogeneous coform web of: non-elastic meltblown fibers, and at least one type of secondary fibers, and a reinforcing material, wherein said non-elastic meltblown fibers, said secondary fibers and said reinforcing material are joined by hydraulic entangling.
Claim 19
Dependent Claim
27 words
The nonwoven fibrous reinforced non-elastic web according to claim 16, wherein said coform web includes fibers selected from pulp fibers, staple fibers, meltblown fibers and continuous filaments.
Claim 20
Dependent Claim
18 words
The nonwoven fibrous reinforced non-elastic web according to claim 16, wherein said reinforcing material is a spunbond material.
Claim 21
Dependent Claim
48 words
A process for forming a nonwoven non-elastic web comprising: providing a substantially homogeneous admixture comprising: non-elastic meltblown fibers, and at least one type of secondary fibers; and directing a plurality of high-pressure liquid streams toward a surface of said admixture said non-elastic meltblown fibers and said secondary fibers.
Claim 22
Dependent Claim
48 words
A process for forming a nonwoven non-elastic web comprising: providing a substantially homogeneous admixture comprising: non-elastic meltblown fibers, and at least one type of secondary fibers; and directing a plurality of high-pressure liquid streams toward a surface of said admixture said non-elastic meltblown fibers and said secondary fibers.
Claim 23
Dependent Claim
15 words
The process according to claim 19 wherein said material has at least one patterned surface.
Claim 24
Dependent Claim
25 words
The process according to claim 19, wherein said plurality of high-pressure liquid streams are directed to said surface of said admixture a plurality of times.
Claim 25
Dependent Claim
21 words
The process according to claim 19, wherein said plurality of high-pressure liquid streams are directed toward each surface of said admixture.
Claim 26
Dependent Claim
65 words
A process for forming a nonwoven fibrous reinforced non-elastic web comprising: providing a composite comprising: a substantially homogeneous admixture of non-elastic meltblown fibers and at least one type of secondary fibers, and a reinforcing material; and directing a plurality of high-pressure liquid streams toward at least one surface of said composite to entangle said non-elastic meltblown fibers with said secondary fibers and said reinforcing material.
Claim 27
Dependent Claim
65 words
A process for forming a nonwoven fibrous reinforced non-elastic web comprising: providing a composite comprising: a substantially homogeneous admixture of non-elastic meltblown fibers and at least one type of secondary fibers, and a reinforcing material; and directing a plurality of high-pressure liquid streams toward at least one surface of said composite to entangle said non-elastic meltblown fibers with said secondary fibers and said reinforcing material.
Claim 28
Dependent Claim
21 words
The process according to claim 23 wherein said plurality of high-pressure liquid streams are directed toward each surface of said composite.
Claim 29
Dependent Claim
9 words
The product formed by the process of claim 19.
Claim 30
Dependent Claim
9 words
The product formed by the process of claim 23.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |