Patent US2346696A successfully refreshed from Google Patents.
US4713068A
Expired / Lapsed
US
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Breathable clothlike barrier having controlled structure defensive composite
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1986-10-31
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Granted: 1987-12-15
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Expires: 2006-10-31
Abstract
Abstract A breathable clothlike barrier which includes a defensive composite having at least two layers: A. a first layer which is a clothlike porous substrate having a first side and a second side, in which: the first layer has a nominal basis weight of at least about 10 g/m 2 ; the fibers comprising the first layer have an average fiber diameter in the range of from about 0.01 to about 10 microns; and each of substantially all of the pores at the surface of the first side of the first layer has a cross-sectional area of from about 6×10 -16 m 2 to about 2×10 -9 m 2 ; and B. a second layer joined to the first side of the first layer, which second layer is a continuous film of a poly(vinyl alcohol), in which: the film is not microporous in that it is substantially free of voids which connect the two surfaces of the film; and the film has an average thickness of (a) from about 3 to about 25 microns when the basis weight of the first layer is at least about 20 g/m 2 or (b) from about 8 to about 25 microns when the basis weight of the first layer is from about 10 to less than about 20 g/m 2 ; in which the first layer side of the second layer is intimately comingled with at least some of the fibers at the surface of the first side of the first layer, and the defensive composite has a water vapor transmission rate at 37 degrees C. and about 50 percent relative humidity of from about 100 to about 5,000 g/m 2 /24 hours and is impermeable to 0.9 percent by weight saline solution at about 21 degrees C. for a period of at least about one hour at a hydrostatic head of at least about 11.4 cm.
Inventors
- 👤 Kenneth Y. Wang
- 👤 Richard S. Yeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51456; A61F13/51458; A61F13/51462; A61F13/51401; A61F13/51405; A61F13/51474; A61F13/51478; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61F2013/51409; A61F2013/51411; A61F2013/51441; A61F2013/51443; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/27; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/676
Claims Analysis
Total Claims: 70
Claim 1
Independent Claim
312 words
A breathable clothlike barrier which comprises a defensive composite comprising at least two layers: A. a first layer which is a clothlike porous substrate having a first side and a second side, in which: said first layer has a nominal basis weight of at least about 10 g/m 2 ; the fibers comprising said first layer have an average fiber diameter in the range of from about 0.01 to about 10 microns; and each of substantially all of the pores at the surface of said first side of said first layer has a cross-sectional area of from about 6×10 -16 m 2 to about 2×10 -9 m 2 ; and B. a second layer joined to said first side of said first layer, which second layer comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of (a) from about 3 to about 25 microns when the basis weight of said first layer is at least about 20 g/m 2 or (b) from about 8 to about 25 microns when the basis weight of said first layer is from about 10 to less than about 20 g/m 2 ; wherein the first layer side of said second layer is intimately comingled with at least some of the fibers at the surface of said first side of said first layer, and said defensive composite has a water vapor transmission rate at 37 degrees C. and about 50 percent relative humidity of from about 100 to about 5,000 g/m 2 /24 hours and is impermeable to 0.9 percent by weight saline solution at about 21 degrees C. for a period of at least about one hour at a hydrostatic head of at least about 11.4 cm.
Claim 2
Dependent Claim
312 words
A breathable clothlike barrier which comprises a defensive composite comprising at least two layers: A. a first layer which is a clothlike porous substrate having a first side and a second side, in which: said first layer has a nominal basis weight of at least about 10 g/m 2 ; the fibers comprising said first layer have an average fiber diameter in the range of from about 0.01 to about 10 microns; and each of substantially all of the pores at the surface of said first side of said first layer has a cross-sectional area of from about 6×10 -16 m 2 to about 2×10 -9 m 2 ; and B. a second layer joined to said first side of said first layer, which second layer comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of (a) from about 3 to about 25 microns when the basis weight of said first layer is at least about 20 g/m 2 or (b) from about 8 to about 25 microns when the basis weight of said first layer is from about 10 to less than about 20 g/m 2 ; wherein the first layer side of said second layer is intimately comingled with at least some of the fibers at the surface of said first side of said first layer, and said defensive composite has a water vapor transmission rate at 37 degrees C. and about 50 percent relative humidity of from about 100 to about 5,000 g/m 2 /24 hours and is impermeable to 0.9 percent by weight saline solution at about 21 degrees C. for a period of at least about one hour at a hydrostatic head of at least about 11.4 cm.
Claim 3
Dependent Claim
25 words
The breathable clothlike barrier of claim 1, in which said film is substantially insoluble in water having a temperature less than about 50 degrees C.
Claim 4
Dependent Claim
16 words
The breathable clothlike barrier of claim 1, in which said first layer is a fibrous substrate.
Claim 5
Dependent Claim
16 words
The breathable clothlike barrier of claim 3, in which said fibrous substrate is a nonwoven web.
Claim 6
Dependent Claim
16 words
The breathable clothlike barrier of claim 4, in which said nonwoven web is a meltblown web.
Claim 7
Dependent Claim
17 words
The breathable clothlike barrier of claim 5, in which said meltblown web is composed of polyolefin fibers.
Claim 8
Dependent Claim
13 words
The breathable clothlike barrier of claim 6, in which said polyolefin is polypropylene.
Claim 9
Dependent Claim
29 words
The breathable clothlike barrier of claim 5, in which said meltblown web is composed of fibers having diameters in the range of from about 0.01 to about 5 microns.
Claim 10
Dependent Claim
36 words
The breathable clothlike barrier of claim 5, in which each of substantially all of the pores of said meltblown web has a cross-sectional area of from about 6×10 -16 to about 7×10 -10 m 2 .
Claim 11
Dependent Claim
36 words
The breathable clothlike barrier of claim 5, in which each of substantially all of the pores of said meltblown web has a cross-sectional area of from about 6×10 -16 to about 1.8×10 -10 m 2 .
Claim 12
Dependent Claim
24 words
The breathable clothlike barrier of claim 5, in which the basis weight of said meltblown web is at least about 20 g/m 2 .
Claim 13
Dependent Claim
24 words
The breathable clothlike barrier of claim 5, in which the basis weight of said meltblown web is at least about 25 g/m 2 .
Claim 14
Dependent Claim
22 words
The breathable clothlike barrier of claim 1, in which said breathable clothlike barrier includes a third layer which is a porous substrate.
Claim 15
Dependent Claim
16 words
The breathable clothlike barrier of claim 13, in which said porous substrate is a fibrous substrate.
Claim 16
Dependent Claim
16 words
The breathable clothlike barrier of claim 14, in which said fibrous substrate is a nonwoven web.
Claim 17
Dependent Claim
22 words
The breathable clothlike barrier of claim 15, in which said third layer is joined to said second side of said first layer.
Claim 18
Dependent Claim
18 words
The breathable clothlike barrier of claim 15, in which said third layer is joined to said second layer.
Claim 19
Dependent Claim
16 words
The breathable clothlike barrier of claim 15, in which said nonwoven web is a meltblown web.
Claim 20
Dependent Claim
22 words
The breathable clothlike barrier of claim 18, in which said third layer is joined to said second side of said first layer.
Claim 21
Dependent Claim
18 words
The breathable clothlike barrier of claim 18, in which said third layer is joined to said second layer.
Claim 22
Dependent Claim
16 words
The breathable clothlike barrier of claim 15, in which said nonwoven web is a spunbonded web.
Claim 23
Dependent Claim
22 words
The breathable clothlike barrier of claim 21, in which said third layer is joined to said second side of said first layer.
Claim 24
Dependent Claim
18 words
The breathable clothlike barrier of claim 21, in which said third layer is joined to said second layer.
Claim 25
Dependent Claim
64 words
The breathable clothlike barrier of claim 1, in which said breathable clothlike barrier includes a third layer which comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of from about 3 to about 250 microns.
Claim 26
Dependent Claim
25 words
The breathable clothlike barrier of claim 24, in which said film is substantially insoluble in water having a temperature less than about 50 degrees C.
Claim 27
Dependent Claim
22 words
The breathable clothlike barrier of claim 24, in which said third layer is joined to said second side of said first layer.
Claim 28
Dependent Claim
18 words
The breathable clothlike barrier of claim 24, in which said third layer is joined to said second layer.
Claim 29
Dependent Claim
22 words
The breathable clothlike barrier of claim 13, in which said breathable clothlike barrier includes a fourth layer which is a porous substrate.
Claim 30
Dependent Claim
16 words
The breathable clothlike barrier of claim 28, in which said fourth layer is a nonwoven web.
Claim 31
Dependent Claim
22 words
The breathable clothlike barrier of claim 14, in which said breathable clothlike barrier includes a fourth layer which is a porous substrate.
Claim 32
Dependent Claim
16 words
The breathable clothlike barrier of claim 30, in which said fourth layer is a nonwoven web.
Claim 33
Dependent Claim
22 words
The breathable clothlike barrier of claim 15, in which said breathable clothlike barrier includes a fourth layer which is a porous substrate.
Claim 34
Dependent Claim
16 words
The breathable clothlike barrier of claim 32, in which said fourth layer is a nonwoven web.
Claim 35
Dependent Claim
22 words
The breathable clothlike barrier of claim 24, in which said breathable clothlike barrier includes a fourth layer which is a porous substrate.
Claim 36
Dependent Claim
16 words
The breathable clothlike barrier of claim 34, in which said fourth layer is a nonwoven web.
Claim 37
Dependent Claim
22 words
The breathable clothlike barrier of claim 35, in which said fourth layer is joined to said first side of said first layer.
Claim 38
Dependent Claim
18 words
The breathable clothlike barrier of claim 36, in which said fourth layer is joined to said third layer.
Claim 39
Dependent Claim
64 words
The breathable clothlike barrier of claim 13, in which said breathable clothlike barrier includes a fourth layer which comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of from about 3 to about 250 microns.
Claim 40
Dependent Claim
25 words
The breathable clothlike barrier of claim 38, in which said film is substantially insoluble in water having a temperature less than about 50 degrees C.
Claim 41
Dependent Claim
64 words
The breathable clothlike barrier of claim 14, in which said breathable clothlike barrier includes a fourth layer which comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of from about 3 to about 250 microns.
Claim 42
Dependent Claim
25 words
The breathable clothlike barrier of claim 40, in which said film is substantially insoluble in water having a temperature less than about 50 degrees C.
Claim 43
Dependent Claim
64 words
The breathable clothlike barrier of claim 15, in which said breathable clothlike barrier includes a fourth layer which comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of from about 3 to about 250 microns.
Claim 44
Dependent Claim
26 words
The breathable clothlike barrier of claim 42, in which said film is substantially insoluble in water having a temperature of less than about 50 degrees C.
Claim 45
Dependent Claim
64 words
The breathable clothlike barrier of claim 24, in which said breathable clothlike barrier includes a fourth layer which comprises a continuous film of a poly(vinyl alcohol), in which: said film is not microporous in that it is substantially free of voids which connect the two surfaces of said film; and said film has an average thickness of from about 3 to about 250 microns.
Claim 46
Dependent Claim
26 words
The breathable clothlike barrier of claim 44, in which said film is substantially insoluble in water having a temperature of less than about 50 degrees C.
Claim 47
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 1.
Claim 48
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 13.
Claim 49
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 15.
Claim 50
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 24.
Claim 51
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 42.
Claim 52
Dependent Claim
19 words
A disposable absorbent article having an outer cover or baffle which is the breathable clothlike barrier of claim 44.
Claim 53
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 1.
Claim 54
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 13.
Claim 55
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 15.
Claim 56
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 24.
Claim 57
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 42.
Claim 58
Dependent Claim
16 words
A disposable diaper having an outer cover which is the breathable clothlike barrier of claim 44.
Claim 59
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 1.
Claim 60
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 13.
Claim 61
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 15.
Claim 62
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 24.
Claim 63
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 42.
Claim 64
Dependent Claim
16 words
A disposable sanitary napkin having a baffle which is the breathable clothlike barrier of claim 44.
Claim 65
Dependent Claim
17 words
A disposable continent pad having an outer cover which is the breathable clothlike barrier of claim 1.
Claim 66
Dependent Claim
17 words
A disposable incontinent pad having an outer cover which is the breathable clothlike barrier of claim 13.
Claim 67
Dependent Claim
17 words
A disposable incontinent pad having an outer cover which is the breathable clothlike barrier of claim 15.
Claim 68
Dependent Claim
17 words
A disposable incontinent pad having an outer cover which is the breathable clothlike barrier of claim 24.
Claim 69
Dependent Claim
17 words
A disposable incontinent pad having an outer cover which is the breathable clothlike barrier of claim 42.
Claim 70
Dependent Claim
17 words
A disposable incontinent pad having an outer cover which is the breathable clothlike barrier of claim 44.
References Cited (Backward Citations)
US3016599A
Cited
US3253715A
Cited
US3156242A
Cited
US3203419A
Cited
US3426754A
Cited
US3518041A
Cited
US3597307A
Cited
US3590585A
Cited
US3612054A
Cited
US4006052A
Cited
US3849241A
Cited
US3869310A
Cited
US3692618A
Cited
US3704198A
Cited
US3755527A
Cited
US3640829A
Cited
US3932682A
Cited
US3679538A
Cited
US3870593A
Cited
US3843761A
Cited
US3891487A
Cited
US4100324A
Cited
US4289832A
Cited
US4247498A
Cited
US4197148A
Cited
US4178271A
Cited
US4519909A
Cited
US4197371A
Cited
US4226906A
Cited
US4308303A
Cited
US4257997A
Cited
US4347844A
Cited
US4452845A
Cited
US4304812A
Cited
US4384023A
Cited
JPS57142323A
Cited
US4472328A
Cited
US4560611A
Cited
GB2103537A
Cited
US4454191A
Cited
US4430278A
Cited
GB2115702A
Cited
US4595001A
Cited
EP0105629A2
Cited
US4539256A
Cited
US4415617A
Cited
EP0141592A2
Cited
US4603077A
Cited
US4608111A
Cited
DE3417909A1
Cited
US4578069A
Cited
EP0184392A2
Cited
US4613544A
Cited
US4591523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |