Patent US4469754A successfully refreshed from Google Patents.
US4469754A
Expired / Lapsed
US
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Heat seal composition
Assignee: EIDP Inc
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Filing: 1982-05-14
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Granted: 1984-09-04
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Expires: 2002-05-14
Abstract
Abstract Heat seal compositions and articles including the compositions are disclosed. The compositions exhibit a broad temperature range for making heat seals of variable strengths and are useful as the sole heat seal composition in making flexible packages requiring both permanent and peelable seals.
Inventors
- 👤 George L. Hoh
- 👤 Donald A. Vassallo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:16
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/025; C08L23/0876; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0869; C09J123/0876; B; B29; B29C; B29C66/00; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91221; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
203 words
A flexible packaging material comprising a substantially homogeneous blend of polymeric materials comprising: (a) 20 to 80 percent, by weight, of a terpolymer having, as monomeric components, (i) 65 to 95 percent, by weight, ethylene, (ii) 4 to 30 percent, by weight, vinyl alkanoate or an ester selected from the group consisting of alkyl acrylate, and alkyl methacrylate alkanoic wherein the alkanoic acid moiety of the alkanoate and the alkyl group have one to four carbon atoms, and (iii) 0.5 to 20 percent, by weight, ethylenically unsaturated monocarboxylic acid selected from the group consisting of acrylic acid and methacrylic acid; and (b) 20 to 80 percent, by weight, of an ionomer having, as monomeric components, (i) 75 to 99 percent, by weight, ethylene, (ii) 1 to 25 percent, by weight, ethylenically unsaturated monocarboxylic acid selected from the group consisting of acrylic acid and methacrylic acid wherein the sum of the weight percentages of comonomers ii and iii in the terpolymer is at least eight percentage points higher than the weight percentage of comonomer ii in the ionomer and wherein 5 to 40 percent of the carboxylic acid in the blend is neutralized by zinc or magnesium ions coated onto a substrate packaging material.
Claim 2
Dependent Claim
203 words
A flexible packaging material comprising a substantially homogeneous blend of polymeric materials comprising: (a) 20 to 80 percent, by weight, of a terpolymer having, as monomeric components, (i) 65 to 95 percent, by weight, ethylene, (ii) 4 to 30 percent, by weight, vinyl alkanoate or an ester selected from the group consisting of alkyl acrylate, and alkyl methacrylate alkanoic wherein the alkanoic acid moiety of the alkanoate and the alkyl group have one to four carbon atoms, and (iii) 0.5 to 20 percent, by weight, ethylenically unsaturated monocarboxylic acid selected from the group consisting of acrylic acid and methacrylic acid; and (b) 20 to 80 percent, by weight, of an ionomer having, as monomeric components, (i) 75 to 99 percent, by weight, ethylene, (ii) 1 to 25 percent, by weight, ethylenically unsaturated monocarboxylic acid selected from the group consisting of acrylic acid and methacrylic acid wherein the sum of the weight percentages of comonomers ii and iii in the terpolymer is at least eight percentage points higher than the weight percentage of comonomer ii in the ionomer and wherein 5 to 40 percent of the carboxylic acid in the blend is neutralized by zinc or magnesium ions coated onto a substrate packaging material.
Claim 3
Dependent Claim
26 words
The flexible packaging material of claim 1 wherein the monomer, ii), of the terpolymer in the blend is a vinyl alkanoate and the alkanoate is acetate.
Claim 4
Dependent Claim
27 words
The flexible packaging material of claim 1 wherein the monomer, ii), of the terpolymer in the blend is an alkyl acrylate and the alkyl group is isobutyl.
Claim 5
Dependent Claim
19 words
The flexible packaging material of claim 1 wherein the carboxylic acid in the blend is neutralized by zinc ions.
Claim 6
Dependent Claim
19 words
The flexible packaging material of claim 1 wherein the carboxylic acid in the blend is neutralized by magnesium ions.
Claim 7
Dependent Claim
22 words
The packaging material of claim 1 wherein the substrate material is selected from the group consisting of polyethylene, polypropylene, polyesters, and polyamides.
Claim 8
Dependent Claim
12 words
The packaging material of claim 6 wherein the substrate material is polyethylene.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |