US5478616A
Expired / Lapsed
US
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Heat-sealable films and film laminates with an antistatic coating
Assignee: Hoechst AG
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Filing: 1993-06-08
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Granted: 1995-12-26
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Expires: 2013-06-08
Abstract
Abstract A weldable and/or heat-sealable, single- or multilayer film having at least one weldable and/or heat-sealable layer, the weldable and/or heat-sealable film being provided on at least one side on one outer surface with an antistatic coating, wherein the antistatic coating has a thickness of from about 0.005 to about 0.08 mu m and comprises at least about 60% by weight of a soluble, intrinsically electroconductive polymer which comprises structural units of the formula <IMAGE> in which R1 is a C1- to C12- or a C6- to C30-alkoxy group, and which has a degree of polymerization of less than about 100, where the polymer or oligomer is in oxidized form and has an appropriate number of anions to compensate for the positive charge. These films are heat-sealable, in spite of their antistatic coating.
Inventors
- 👤 Karl-Heinz Kochem
- 👤 Michael Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/36; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J7/056; C09; C09D; C09D165/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; H01G; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/54; H01G11/56; H05; H05F; H05F1/00; H05F1/02; B32B2307/00; B32B2307/30; B32B2307/31; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2553/00; C08J2465/00; Y; Y02; Y02E; Y02E60/00; Y02E60/13; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31533
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
97 words
Film having an outer weldable or heat-sealable layer, wherein the weldable or heat-sealable layer has on an outer surface an antistatic coating having a thickness of about 0.005 μm to about 0.08 μm which comprises at least about 60% by weight of a soluble, intrinsically electroconductive polymer which comprises repeating units of the formula ##STR8## in which R 1 is a (C 1 to C 30 )-alkoxy group, and which has a degree of polymerization of less than about 100, and wherein the polymer is in oxidized form and contains anions to compensate for the positive charge.
Claim 2
Dependent Claim
97 words
Film having an outer weldable or heat-sealable layer, wherein the weldable or heat-sealable layer has on an outer surface an antistatic coating having a thickness of about 0.005 μm to about 0.08 μm which comprises at least about 60% by weight of a soluble, intrinsically electroconductive polymer which comprises repeating units of the formula ##STR8## in which R 1 is a (C 1 to C 30 )-alkoxy group, and which has a degree of polymerization of less than about 100, and wherein the polymer is in oxidized form and contains anions to compensate for the positive charge.
Claim 3
Dependent Claim
22 words
Film as claimed in claim 1, wherein the antistatic coating has a thickness of from about 0.01 μm to about 0.05 μm.
Claim 4
Dependent Claim
29 words
Film as claimed in claim 1, wherein the antistatic coating comprises at least 75% by weight of the intrinsically electroconductive polymer which comprises structural units of the formula ##STR9##
Claim 5
Dependent Claim
24 words
Film as claimed in claim 1, wherein R 1 is a (C 1 -C 4 )- or a (C 12 -C 16 )-alkoxy group.
Claim 6
Dependent Claim
21 words
Film as claimed in claim 1, wherein the degree of polymerization of the intrinsically electroconductive polymer is less than about 50.
Claim 7
Dependent Claim
25 words
Film as claimed in claim 1, wherein the surface resistance of the antistatic coating is between about 10 5 ohm and about 10 11 ohm.
Claim 8
Dependent Claim
19 words
Film as claimed in claim 1, wherein the antistatic coating contains up to about 40% by weight of additives.
Claim 9
Dependent Claim
29 words
Film as claimed in claim 7, wherein the additives are selected from one or more of binders, wetting agents, flow-control agents, lubricants, adhesion promoters, and mixtures of said substances.
Claim 10
Dependent Claim
20 words
Film as claimed in claim 1, which has an overall thickness of from about 1 μm to about 400 μm.
Claim 11
Dependent Claim
19 words
Film as claimed in claim 9, which has an overall thickness of from about 12 to about 200 μm.
Claim 12
Dependent Claim
18 words
Film as claimed in claim 1, having a seal seam strength of at least about 10 N/15 mm.
Claim 13
Dependent Claim
45 words
An antistatically coated film, which comprises a base film on which is applied a heat-sealable layer, wherein an antistatic coating is applied on the heat-sealable layer, and wherein a seal seam strength after sealing of the heat-sealable layer is at least about 10 N/15 mm.
Claim 14
Dependent Claim
45 words
An antistatically coated film, which comprises a base film on which is applied a heat-sealable layer, wherein an antistatic coating is applied on the heat-sealable layer, and wherein a seal seam strength after sealing of the heat-sealable layer is at least about 10 N/15 mm.
Claim 15
Dependent Claim
15 words
A heat-sealable antistatic bag or screening bag comprising a film as claimed in claim 1.
Claim 16
Dependent Claim
12 words
A blister pack cover comprising a film as claimed in claim 1.
Claim 17
Dependent Claim
12 words
An antistatic adhesive tape comprising a film as claimed in claim 1.
Claim 18
Dependent Claim
21 words
A laminate comprising a non-heat sealable base layer, and the film of claim 1 adhered to said non-heat sealable base layer.
Claim 19
Dependent Claim
16 words
A laminate of claim 16, wherein said non-heat sealable base layer has an antistatic covering thereon.
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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) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |