EP0072223A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
High temperature heat seal film
Assignee: EIDP Inc
•
Filing: 1982-08-06
•
Granted: —
•
Expires: 2002-08-06
Abstract
Abstract For use as a heat sealable, high temperature, insulative wrapping, a laminar structure of a polyimide inner layer and two fluoropolymer outer layers wherein the outer layers are pigmented for a combination of color, increased heat aged bond retention, and reduced heat seal energy requirements.
Inventors
- 👤 Morton Katz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:11
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/052; H01B3/44; H01B3/443; H01B3/445; C08J2379/00; C08J2379/04; C08J2379/08; C08J2427/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
In a laminar structure comprising an inner layer of a polyimide and two outer layers of a fluoropolymer, the improvement which comprises including from 1 to 20 percent, by weight, of an inorganic pigment in each of the outer layers.
Claim 2
Dependent Claim
40 words
In a laminar structure comprising an inner layer of a polyimide and two outer layers of a fluoropolymer, the improvement which comprises including from 1 to 20 percent, by weight, of an inorganic pigment in each of the outer layers.
Claim 3
Dependent Claim
19 words
The laminar structure of Claim 1 wherein the fluoropolymer is a copolymer of hexafluoropropylene and tetrafluoroethylene. or Claim 2
Claim 4
Dependent Claim
27 words
The laminar structure of Claim 1/ wherein there is alpha-chloromethylphenyltrialkoxy silane at each interface between the polyimide layer and the copolymer layers. any one of to 3
Claim 5
Dependent Claim
8 words
The laminar structure of/Claimsl/wherein the pigment is carbon.
Claim 6
Dependent Claim
11 words
The laminar structure of Claim 2 wherein the pigment is carbon.
Claim 7
Dependent Claim
17 words
The laminar structure of any one of Claims 1 to 3 wherein the pigment is titanium dioxide.
Claim 8
Dependent Claim
17 words
The laminar structure of Claim 2 wherein the pigment is titanium dioxide. any one of to 7
Claim 9
Dependent Claim
44 words
The laminar structure of/Claimsl/wherein the copolymer is between about 5 percent and about 50 percent by weight, based on the total copolymer weight, of hexafluoropropylene and between about 50 percent and about 95 percent by weight, based on the total copolymer weight, of tetrafluoroethylene.
Claim 10
Dependent Claim
47 words
The laminar structure of Claim 3 wherein the copolymer is between about 5 percent and about 50 percent by weight, based on the total copolymer weight, of hexafluoropropylene and between about 50 percent and about 95 percent by weight, based on the total copolymer weight, of tetrafluoroethylene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.