US4020215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion of polyolefin onto paper at decreased temperatures
Assignee: Fort James Corp
•
Filing: 1975-05-30
•
Granted: 1977-04-26
•
Expires: 1995-05-30
Abstract
Abstract By coating a paper substrate first with a polyalkyleneimine and then with a polymer containing groups which react chemically with the imino groups of the polyalkyleneimine, a polyolefin can be extruded onto the substrate with good adhesion at temperatures lower than the temperature that would be required to obtain the same degree of adhesion if the polymer containing the reactive groups were not present.
Inventors
- 👤 Lubomir Michaylov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/30; B32B27/308; B32B27/32; B32B7/00; B32B7/04; B32B7/10; B32B2255/00; B32B2255/12; B32B2255/26; B32B2309/00; B32B2309/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536; Y10T428/31721; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
52 words
A laminate comprising successively a. a paper substrate coated with a polyalkyleneimine, b. a layer of a polymer containing functional groups which react chemically with the imino groups of the polyalkyleneimine, the functional groups constituting from about 1 to 25 mole percent of the polymer, and c. a layer of a polyolefin.
Claim 2
Dependent Claim
52 words
A laminate comprising successively a. a paper substrate coated with a polyalkyleneimine, b. a layer of a polymer containing functional groups which react chemically with the imino groups of the polyalkyleneimine, the functional groups constituting from about 1 to 25 mole percent of the polymer, and c. a layer of a polyolefin.
Claim 3
Dependent Claim
12 words
The laminate of claim 1 wherein the functional groups are carboxyl groups.
Claim 4
Dependent Claim
26 words
The laminate of claim 2 wherein the polymer containing carboxyl groups is a copolymer of an alpha olefin and an alpha, beta ethylenically unsaturated carboxylic acid.
Claim 5
Dependent Claim
19 words
The laminate of claim 3 wherein the copolymer is a copolymer of ethylene and acrylic acid or methacrylic acid.
Claim 6
Dependent Claim
21 words
The laminate of claim 4 wherein the polyalkyleneimine is selected from the group consisting of polyethyleneimine, poly-propyleneimine, polybuteneimine, polyisobutyleneimine, and poly-N-methylethyleneimine.
Claim 7
Dependent Claim
22 words
The laminate of claim 4 wherein the copolymer has distributed therein a metal ion having an ionized valence of 1 to 3.
Claim 8
Dependent Claim
10 words
The laminate of claim 6 wherein the polyalkyleneimine is polyethyleneimine.
Claim 9
Dependent Claim
10 words
The laminate of claim 7 wherein the polyolefin is polyethylene.
Claim 10
Dependent Claim
12 words
The laminate of claim 8 wherein the paper substrate is electrically conductive.
Claim 11
Dependent Claim
13 words
The laminate of claim 9 wherein the laminate is an electrostatic recording element.
Claim 12
Dependent Claim
13 words
The laminate of claim 10 wherein the laminate is an electrographic recording element.
Claim 13
Dependent Claim
65 words
In a method of extruding a layer of polyolefin onto a paper substrate coated with a polyalkyleneimine, the improvement of interposing between the coated substrate and the polyolefin layer a layer of a polymer containing 1-25 mole percent functional groups which react chemically with the imino groups of the polyalkyleneimine and extruding the polyolefin layer at a temperature of from about 500° to 580° F.
Claim 14
Dependent Claim
65 words
In a method of extruding a layer of polyolefin onto a paper substrate coated with a polyalkyleneimine, the improvement of interposing between the coated substrate and the polyolefin layer a layer of a polymer containing 1-25 mole percent functional groups which react chemically with the imino groups of the polyalkyleneimine and extruding the polyolefin layer at a temperature of from about 500° to 580° F.
Claim 15
Dependent Claim
16 words
The improvement of claim 12 wherein the polymer containing functional groups is coextruded with the polyolefin.
Claim 16
Dependent Claim
19 words
The improvement of claim 13 wherein the extrusion temperature of the polyolefin is from about 500° to 550° F.
References Cited (Backward Citations)
US3077428A
Cited
US3076720A
Cited
US3198692A
Cited
US3230135A
Cited
US3510342A
Cited
US3622439A
Cited
US3836620A
Cited
US3993850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |