Patent US2169742A successfully refreshed from Google Patents.
US4882894A
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Agent for imparting antistatic characteristics to a thermoplastic polymer and a thermoplastic polymer composition containing the agent
Assignee: Cryovac LLC
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Filing: 1986-10-14
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Granted: 1989-11-28
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Expires: 2006-10-14
Abstract
Abstract Disclosed is a thermoplastic polymeric composition having antistatic characteristics and a method to make same. The composition comprises a thermoplastic polymer in admixture with an antistatic agent. In one embodiment the polymer is nylon 12 and the agent is N-butyl benzenesulfonamide. Also disclosed is the antistatic polymeric composition in a film, which is useful for packaging static sensitive devices such as electronic circuit boards, or for packaging devices that must be protected from static electricity such as devices in a medical operating room where explosive oxygen and/or ether are present.
Inventors
- 👤 Marvin R. Havens
- 👤 Joseph R. Lovin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/16; B32B27/18; B32B27/32; B32B27/34; C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08L; C08L77/00; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/21; B32B2307/50; B32B2307/514; B32B2323/00; B32B2323/04; B32B2377/00; B32B2553/00; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
A method for protecting wrapped static sensitive devices from electrostatic charges comprising: a. providing a wrap comprising an antistatic film having one or more layers, wherein at least one layer comprises a composition of a thermoplastic polymer in admixture with an antistatic agent wherein said polymer comprises nylon and said antistatic agent comprises aromatic sulfonamide that is substantially non-hygroscopic and substantially non-migratable; and b. enclosing said wrap about a selected device.
Claim 2
Independent Claim
71 words
A method for protecting wrapped static sensitive devices from electrostatic charges comprising: a. providing a wrap comprising an antistatic film having one or more layers, wherein at least one layer comprises a composition of a thermoplastic polymer in admixture with an antistatic agent wherein said polymer comprises nylon and said antistatic agent comprises aromatic sulfonamide that is substantially non-hygroscopic and substantially non-migratable; and b. enclosing said wrap about a selected device.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said film comprises a monolayer film.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein said film comprises a film having at least two layers.
Claim 5
Dependent Claim
25 words
The method of claim 1, wherein the antistatic agent is present in the admixture in an amount from about 10% to about 80% by weight.
Claim 6
Dependent Claim
21 words
The method of claim 1, wherein the aromatic sulfonamide is benzenesulfonamide, N-butyl benzenesulfonamide, o-toluenesulfonamide, p-toluenesulfonamide, N-ethyl-o-toluene sulfonamide, N-ethyl-p-toluenesulfonamide, or mixtures thereof.
Claim 7
Dependent Claim
48 words
The method of claim 1, wherein said film comprises a film having at least two layers wherein one layer of said at least two layers comprises a nylon polymer in admixture with an aromatic sulfonamide, and the other layer of said at least two layers comprises a polyethylene.
Claim 8
Dependent Claim
19 words
The method of claim 6, wherein the polyethylene is LDPE, MDPE, HDPE, LLDPE, VLDPE, EVA or a mixture thereof.
Claim 9
Dependent Claim
21 words
The method of claim 1, wherein said film comprises at least the multilayer structure: nylon+aromatic sulfonamide/polyethylene/polyethylene/nylon+aromatic sulfonamide, in air cushion form.
Claim 10
Dependent Claim
19 words
The method of claim 1, wherein said film has been irradiated at a dosage up to about 12 MR.
Claim 11
Dependent Claim
10 words
The method of claim 1, wherein said film is oriented.
Claim 12
Dependent Claim
24 words
A multiply film having anti-static characteristics comprising at least the multilayer structure: nylon+aromatic sulfonamide/polyethylene, wherein said aromatic sulfonamide is substantially non-hygroscopic and substantially non-migratable.
Claim 13
Dependent Claim
24 words
A multiply film having anti-static characteristics comprising at least the multilayer structure: nylon+aromatic sulfonamide/polyethylene, wherein said aromatic sulfonamide is substantially non-hygroscopic and substantially non-migratable.
Claim 14
Dependent Claim
19 words
The multiply film of claim 11, comprising at least the multilayer structure: nylon+aromatic sulfonamide/polyethylene/polyethylene/nylon+aromatic sulfonamide, in air cushion form.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |