Patent US4882894A successfully refreshed from Google Patents.
US4882894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agent for imparting antistatic characteristics to a thermoplastic polymer and a thermoplastic polymer composition containing the agent
Assignee: Cryovac LLC
•
Filing: 1986-10-14
•
Granted: 1989-11-28
•
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 17:46
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.
References Cited (Backward Citations)
US2214405A
Cited
US3022543A
Cited
US3164481A
Cited
US4048428A
Cited
US3821182A
Cited
US3223545A
Cited
US3220985A
Cited
US3441552A
Cited
US3741253A
Cited
US4061869A
Cited
US4268583A
Cited
US4194039A
Cited
US4188443A
Cited
US4274900A
Cited
US4229241A
Cited
EP0016617A1
Cited
US4347332A
Cited
US4391952A
Cited
US4536532A
Cited
US4494651A
Cited
US4526952A
Cited
US4576669A
Cited
US4579516A
Cited
US4605684A
Cited
EP0224979A1
Cited
US4802325A
Cited
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 |