Patent US4376799A successfully refreshed from Google Patents.
US4376799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quiet film and container
Assignee: Dow Chemical Co
•
Filing: 1980-09-16
•
Granted: 1983-03-15
•
Expires: 2000-09-16
Abstract
Abstract A substantially rustle-free thermoplastic film and container made therefrom. The film may be a multilayer structure, a skin of which is formed of a chlorinated polyethylene resin blend. The composition of said structure is such that quietness is imparted without detracting from the extrudability and other physical characteristics necessary for practical applications. A vapor barrier may be included as a core layer. A particular application for the present invention is an ostomy bag.
Inventors
- 👤 Martin H. Tusim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A61; A61F; A61F5/00; A61F5/44; A61L; A61L28/00; A61L28/0073; A61L28/008; B32B27/30; B32B27/304; B32B27/32; B32B27/322; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/128; C08J5/18; C08L; C08L23/00; C08L23/26; C08L23/28; B32B2307/00; B32B2307/50; B32B2307/558; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7246; B32B2323/00; B32B2323/04; B32B2327/00; B32B2327/06; B32B2439/00; B32B2439/80; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A substantially rustle-free thermoplastic product having a film body comprising a multilayer structure, said structure having at least two skin layers and a core layer, a skin layer of said structure comprising a resin blend, a major component of said blend being a chlorinated polyethylene resin, said film when measured against a background noise generating a frequency reading of about 600 Hertz having a noise level generating a frequency reading of less than 4000 Hertz, the composition of the chlorinated polyethylene comprising between about 25 and 50 weight percent chlorine and the balance being substantially an olefinic polymer or copolymer, said polymer or copolymer being low or medium density polyethylene or an ethylene copolymer which comprises ethylene in at least one monoethylenically unsaturated comonomer or a blend of one or more of such polymers or copolymers; the blend of the layer comprising between about 40 and 95 weight percent of the chlorinated polyethylene resin, said core layer being of a different resin than either of said skin layers.
Claim 2
Dependent Claim
168 words
A substantially rustle-free thermoplastic product having a film body comprising a multilayer structure, said structure having at least two skin layers and a core layer, a skin layer of said structure comprising a resin blend, a major component of said blend being a chlorinated polyethylene resin, said film when measured against a background noise generating a frequency reading of about 600 Hertz having a noise level generating a frequency reading of less than 4000 Hertz, the composition of the chlorinated polyethylene comprising between about 25 and 50 weight percent chlorine and the balance being substantially an olefinic polymer or copolymer, said polymer or copolymer being low or medium density polyethylene or an ethylene copolymer which comprises ethylene in at least one monoethylenically unsaturated comonomer or a blend of one or more of such polymers or copolymers; the blend of the layer comprising between about 40 and 95 weight percent of the chlorinated polyethylene resin, said core layer being of a different resin than either of said skin layers.
Claim 3
Dependent Claim
21 words
The product of claim 1 wherein the composition of the chlorinated polyethylene comprises between about 30 and 42 weight percent chlorine.
Claim 4
Dependent Claim
17 words
The product of claim 1 wherein intermediate layers are located between the skin layers and core layer.
Claim 5
Dependent Claim
9 words
The product of claim 1 comprising a medical pouch.
Claim 6
Dependent Claim
9 words
The product of claim 1 comprising a wrapping film.
Claim 7
Dependent Claim
28 words
The product of claim 1 wherein said monoethylenically unsaturated comonomer comprises another lower olefin or a carboxylic acid or an alkyl ester of a monoethylenically unsaturated carboxylic acid.
Claim 8
Dependent Claim
17 words
The product of claim 1 wherein said core layer comprises a water vapor and gas barrier resin.
Claim 9
Dependent Claim
15 words
The product of claim 7 wherein said barrier resin comprises a vinylidene/vinyl chloride copolymer resin.
Claim 10
Dependent Claim
25 words
The product of claim 1 wherein each of the skin layers is comprised of said blend and is about 1 mil or greater in thickness.
Claim 11
Dependent Claim
30 words
The product of claim 1 wherein the skin layers are comprised of said blend and comprise more than 80 percent of the total thickness of the material comprising said product.
Claim 12
Dependent Claim
23 words
The product of claims 9 or 10 wherein the total film gauge thickness thereof ranges from about 2 mils to about 5 mils.
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) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |