US3793133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy absorbing continuous filament web laminate
Assignee: Kimberly Clark Corp
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Filing: 1972-02-22
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Granted: 1974-02-19
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Expires: 1992-02-22
Abstract
Abstract Improved laminates comprising a low strength, fluid permeable web and a web of continuous filaments of a thermoplastic polymer are disclosed. The continuous filment web contains easily releasable intermittent autogenous bonds. Ply attachment in the laminate is achieved with a polymeric material which encapsulates the filaments to form disruptable adhesive bonds and extends into the permeable web at intermittent discrete areas. The disclosed laminates are attractive in appearance, absorb and retain fluid, and, in particular, possess unexpected superiority with respect to energy absorption, strength, and tear resistance.
Inventors
- 👤 J Beaudoin
- 👤 R Brock
- 👤 H Minshell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H5/00; D04H5/04; B32B5/02; B32B5/022; B32B2262/00; B32B2262/02; B32B2262/0223; B32B2262/0238; B32B2262/0253; B32B2307/00; B32B2307/50; B32B2307/56; B32B2307/582; B32B2307/5825; B32B2307/70; B32B2307/726; B32B2437/00; B32B2601/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/27; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/298; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
21 words
The laminate of claim 1 wherein the autogenous bonds have an unfused bond area coefficient of at least about 55 percent.
Claim 2
Dependent Claim
21 words
The laminate of claim 1 wherein the autogenous bonds have an unfused bond area coefficient of at least about 65 percent.
Claim 3
Dependent Claim
16 words
The laminate of claim 1 wherein the low strength, fluid permeable web is a cellulosic web.
Claim 4
Dependent Claim
20 words
The laminate of claim 4 comprising outer plies of cellulosic webs and an inner ply of the continuous filament web.
Claim 5
Dependent Claim
17 words
The laminate of claim 1 wherein the polymeRic material is a plasticized vinyl chloride polymer or copolymer.
Claim 6
Dependent Claim
17 words
The laminate of claim 5 wherein the polymeric material is a plasticized vinyl chloride polymer or copolymer.
Claim 7
Dependent Claim
21 words
The laminate of claim 7 wherein the autogenous bonds have an unfused bond area coefficient of at least about 65 percent.
Claim 8
Dependent Claim
11 words
The laminate of claim 1 wherein the thermoplastic polymer is polypropylene.
Claim 9
Dependent Claim
11 words
The laminate of claim 8 wherein the thermoplastic polymer is polypropylene.
Claim 10
Dependent Claim
30 words
The laminate of claim 4 wherein the continuous filament web as a basis weight of about 0.3-1.5 oz./yd.2 and the filaments thereof are polypropylene with a denier of about 0.5-10.
Claim 11
Dependent Claim
28 words
The laminate of claim 11 wherein the continuous filament web has a strip tensile toughness index in both the machine and cross directions of less than about 130.
Claim 12
Dependent Claim
28 words
The laminate of claim 12 wherein the continuous filament web has a basis weight of about 0.3-0.8 oz./yd.2 and the filaments thereof have a denier of about 0.8-3.
Claim 13
Dependent Claim
41 words
The laminate of claim 13 wherein the continuous filament web has a strip tensile toughness index in both the machine and cross directions of less than about 75 and the filaments thereof have a tenacity of greater than about 4 grams/denier.
Claim 14
Dependent Claim
20 words
The laminate of claim 14 comprising outer plies of cellulosic webs and an inner ply of the continuous filament web.
Claim 15
Dependent Claim
17 words
The laminate of claim 15 wherein the polymeric material is a plasticized vinyl chloride polymer or copolymer.
Claim 16
Dependent Claim
14 words
The laminate of claim 16 wherein the polymeric material is gelled but not fused.
Claim 17
Dependent Claim
126 words
An improved laminate comprising (1) a low strength, fluid permeable web and (2) a nonwoven web of substantially continuous and randomly deposited, molecularly oriented filaments of a thermoplastic polymer, said nonwoven web containing intermittent autogenous bonds of low intensity such that under strain the bonds disappear due to filament release without substantial filament fracture; ply attachment in said laminate being achieved with a polymeric material which encapsulates said filaments at intermittent, discrete areas with autogenous bonds disposed therebetween and extends into said low strength, fluid permeable web at said areas, said polymeric material having a cohesive strength greater than the autogenous bond strength but slightly less than the filament tenacity such that disruption of the polymeric material is effected under strain prior to excessive filament failure.
Claim 18
Dependent Claim
23 words
The laminate of claim 18 wherein the polymeric material is a plasticized vinyl chloride polymer or copolymer, and the thermoplastic polymer is polypropylene.
Claim 19
Dependent Claim
40 words
The laminate of claim 19 wherein the low strength, fluid permeable web is a cellulosic web and wherein the continuous filment web has a basis weight of about 0.3-1.5 oz./yd.2 and the filaments thereof have a denier of about 0.8-3.
Claim 20
Dependent Claim
20 words
The laminate of claim 20 comprising outer plies of cellulosic webs and an inner ply of the continuous filament web.
Claim 21
Dependent Claim
21 words
The laminate of claim 21 wherein the autogenous bonds have an unfused bond area coefficient of at least about 65 percent.
Claim 22
Dependent Claim
20 words
The laminate of claim 21 wherein the continuous filament web has a grab toughness index of less than about 800.
Claim 23
Dependent Claim
20 words
The laminate of claim 23 wherein the continuous filament web has a grab toughness index of less than about 600.
Claim 24
Dependent Claim
18 words
The laminate of claim 24 wherein the continuous filament web has a basis weight of about 0.3-0.8 oz./yd.2.
Claim 25
Dependent Claim
148 words
An improved laminate comprising (1) a low strength, fluid permeable cellulosic web and (2) a nonwoven web having a basis weight of about 0.3-1.5 oz./yd.2 of substantially continuous and randomly deposited, molecularly oriented 0.8-3 denier filaments of polypropylene, said nonwoven web containing autogenous bonds occupying about 10-25 percent of the web area and intermittently distributed in a density of about 100-500/in.2; ply attachment in said laminate being achieved with a disruptable polymeric material present in an amount of about 0.15-0.75 oz./yd.2 which encapsulates said filaments at intermittent discrete areas with a portion of said intermittent bonds disposed therebetween and extends into said cellulosic web at said areas occupying less than about 25 percent of the web surface area, said continuous filament web having a grab toughness index of less than about 800 and said laminate having a basis weight normalized grab energy absorption of at least about 11.
Claim 26
Dependent Claim
20 words
The laminate of claim 26 comprising outer plies of cellulosic webs and an inner ply of the continuous filament web.
Claim 27
Dependent Claim
18 words
The laminate of claim 27 wherein the polymeric material is a gelled, plasticized vinyl chloride polymer or copolymer.
Claim 28
Dependent Claim
18 words
The laminate of claim 28 wherein the polymeric material is present in an amount of about 0.3-0.6 oz./yd.2.
Claim 29
Dependent Claim
36 words
The laminate of claim 29 wherein said continuous filament web has a grab toughness index of less than about 600 and said laminate has a basis weight normalized grab energy absorption of at least about 30.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |