US3949127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apertured nonwoven webs
Assignee: Kimberly Clark Corp
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Filing: 1973-05-14
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Granted: 1976-04-06
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Expires: 1993-05-14
Abstract
Abstract Webs having a desirable combination of strength and fabric-like characteristics can be prepared by ultrasonically induced fusion of a web of unbonded, molecularly oriented thermoplastic fibers at intermittent regions and in a manner such that the intensity of fusion in the individual intermittent regions diminishes from the center of the regions to their edges. On subsequently stretching, those areas of the regions which are most intensively fused break apart to form the perforations in the web.
Inventors
- 👤 Kurt W. Ostermeier
- 👤 Michael C. Josephs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/74; B29C66/00; B29C66/01; B29C66/347; B29C66/3474; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B32B3/00; B32B3/26; B32B3/266; D; D04; D04H; D04H3/00; D04H3/08; D04H3/14; B29C2793/00; B29C2793/0045; B29C66/71; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854; B32B38/00; B32B38/0012; B32B2038/0028; B32B2262/00; B32B2262/02; B32B2262/0253; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24777; Y10T428/24793; Y10T428/24802; Y10T428/24826; Y10T428/24942
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A strong, stretchable web having desirable fabric-like attributes comprising randomly arranged, molecularly oriented thermoplastic fibers, said web having intermittent perforations through the thickness thereof with the fibers located in the web areas immediately surrounding and defining the perforations being autogenously attached to one another by surface fusion to provide web strength and with the fibers in the regions of the web between the perforations being substantially unbonded to one another, said perforations having propagated outwardly from a central, intensely fused portion of a bond region containing progressively diminishing bond intensity in the direction of the edges thereof.
Claim 2
Dependent Claim
97 words
A strong, stretchable web having desirable fabric-like attributes comprising randomly arranged, molecularly oriented thermoplastic fibers, said web having intermittent perforations through the thickness thereof with the fibers located in the web areas immediately surrounding and defining the perforations being autogenously attached to one another by surface fusion to provide web strength and with the fibers in the regions of the web between the perforations being substantially unbonded to one another, said perforations having propagated outwardly from a central, intensely fused portion of a bond region containing progressively diminishing bond intensity in the direction of the edges thereof.
Claim 3
Dependent Claim
10 words
The web of claim 1 wherein the fibers are polypropylene.
Claim 4
Dependent Claim
17 words
The web of claim 2 wherein the web contains substantially continuous and randomly deposited molecularly oriented filaments.
Claim 5
Dependent Claim
47 words
The web of claim 3 having a basis weight of about 0.5-3 oz./yd. 2 , wherein the filaments thereof have a denier of about 0.5-10, and wherein the perforations thereof are disposed in a density of about 50-3200/in. 2 and occupy a surface area of about 5-50%.
Claim 6
Dependent Claim
47 words
The web of claim 3 having a basis weight of about 1.5-2.5 oz./yd. 2 , wherein the filaments thereof have a denier of about 1-5, and wherein the perforations thereof are disposed in a density of about 50-500/in. 2 and occupy a surface area of about 10-25%.
Claim 7
Dependent Claim
19 words
The strong, stretchable web of claim 1 wherein the web contains substantially continuous and randomly deposited molecularly oriented filaments.
Claim 8
Dependent Claim
47 words
The web of claim 6 having a basis weight of about 1.5-2.5 oz./yd. 2 , wherein the filaments thereof have a denier of about 1-5, and wherein the perforations thereof are disposed in a density of about 50-500/in. 2 and occupy a surface area of about 10-25%.
Claim 9
Dependent Claim
10 words
The web of claim 7 wherein the filaments are polypropylene.
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |