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US4528235A
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US
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Polymer films containing platelet particles
Assignee: Honeywell International Inc
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Filing: 1982-08-05
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Granted: 1985-07-09
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Expires: 2002-08-05
Abstract
Abstract Thin polymer films containing small sized platelet type filler. The polymer has a melt index of from 0.01 to 10 grams per 10 minutes at 190 DEG C. to 250 DEG C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams. The preferred polymer is polycaprolactam or high density polyethylene. There is from 10 to 50 percent of a platelet filler having an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of about 25 micrometers, and an average thickness of less than 0.5 micrometers. The preferred filler is talc. The film is from 10 to 100 micrometers thick and can be a single ply or a laminate.
Inventors
- 👤 William Sacks
- 👤 John P. Sibilia
- 👤 Abraham M. Kotliar
- 👤 Harold D. Oltmann
- 👤 Shu P. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/32; B32B27/322; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K3/00; C08K3/34; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2323/00; B32B2323/04; B32B2323/043; B32B2439/00; B32B2439/70; B32B2439/80; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
104 words
A film having at least one layer comprising: high density polyethylene having a melt index of from 0.01 to 1.0 g/10 minutes at 190° C. as measured on ASTM Test No. D-1238 using a load of 2160 grams; and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the film, the film being from 10 to 100 micrometers in thickness.
Claim 2
Dependent Claim
104 words
A film having at least one layer comprising: high density polyethylene having a melt index of from 0.01 to 1.0 g/10 minutes at 190° C. as measured on ASTM Test No. D-1238 using a load of 2160 grams; and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the film, the film being from 10 to 100 micrometers in thickness.
Claim 3
Dependent Claim
19 words
The film as recited in claim 1 wherein the film has a thickness of from 10 to 50 micrometers.
Claim 4
Dependent Claim
23 words
The film as recited in claim 1 wherein the high density polyethylene has a melt index of from 0.05 to 0.8 g/10 minutes.
Claim 5
Dependent Claim
15 words
A film laminate comprising at least one layer of the film recited in claim 1.
Claim 6
Dependent Claim
12 words
The film as recited in claims 1, wherein the filler is talc.
Claim 7
Dependent Claim
20 words
The film as recited in claims 1, wherein the film contains from 25 to 50 weight percent of the talc.
Claim 8
Dependent Claim
20 words
The film as recited in claims 1, wherein the film contains from 30 to 50 weight percent of the filler.
Claim 9
Dependent Claim
21 words
The film as recited in claims 1, wherein the maximum equivalent diameter of the talc is from 5 to 25 micrometers.
Claim 10
Dependent Claim
20 words
The film as recited in claims 1, wherein the average diameter of the talc is from 1 to 5 micrometers.
Claim 11
Dependent Claim
22 words
The film as recited in claims 1, wherein the platelet orientation factor O p of the filler is from 0.9 to 1.0.
Claim 12
Dependent Claim
17 words
The film as recited in claims 1, having a break elongation of greater than about 50 percent.
Claim 13
Dependent Claim
17 words
The film as recited in claim 11 having a break elongation of from 100 to 500 percent.
Claim 14
Dependent Claim
212 words
A film laminate having at least two layers comprising: at least one layer comprising high density polyethylene having a melt index of from 0.01 to 1.0 g/10 minutes on ASTM Test No. D-1238 using a load of 2160 grams at 190° C., and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one layer of the film; and at least one additional layer comprising a polymer having a melt index of from 0.01 to 10 g/10 minutes at 190° C. to 250° C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the film, the thickness of the film laminate being from 10 to 100 micrometers.
Claim 15
Dependent Claim
212 words
A film laminate having at least two layers comprising: at least one layer comprising high density polyethylene having a melt index of from 0.01 to 1.0 g/10 minutes on ASTM Test No. D-1238 using a load of 2160 grams at 190° C., and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one layer of the film; and at least one additional layer comprising a polymer having a melt index of from 0.01 to 10 g/10 minutes at 190° C. to 250° C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the film, the thickness of the film laminate being from 10 to 100 micrometers.
Claim 16
Dependent Claim
24 words
The film laminate as recited in claim 13 wherein the high density polyethylene has a melt index of from 0.05 to 0.8 g/10 minutes.
Claim 17
Dependent Claim
18 words
The film laminate as recited in claim 13 wherein the thermoplastic in the additional layer is a polyamide.
Claim 18
Dependent Claim
13 words
The film laminate as recited in claim 15 wherein the polyamide is polycaprolactam.
Claim 19
Dependent Claim
218 words
A film laminate having at least two layers comprising: at least one layer comprising a polyamide having a melt index of from 0.1 to 10 g/10 minutes measured on ASTM Test No. D-1238 using a load of 1000 grams at 235° C., and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one layer of the film and at least one additional layer comprising a polymer having a melt index of from 0.01 to 10 g/10 minutes at 190° C. to 250° C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams, and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one additional layer of the film, the film laminate having a thickness of from 10 to 100 micrometers.
Claim 20
Dependent Claim
218 words
A film laminate having at least two layers comprising: at least one layer comprising a polyamide having a melt index of from 0.1 to 10 g/10 minutes measured on ASTM Test No. D-1238 using a load of 1000 grams at 235° C., and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one layer of the film and at least one additional layer comprising a polymer having a melt index of from 0.01 to 10 g/10 minutes at 190° C. to 250° C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams, and from 10 to 50 weight percent of a platelet filler wherein the filler has an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of 25 micrometers, and a thickness of less than 0.5 micrometers, the filler being homogeneously distributed through the film and substantially parallel to the plane of the one additional layer of the film, the film laminate having a thickness of from 10 to 100 micrometers.
Claim 21
Dependent Claim
13 words
The film laminated as recited in claim 17 wherein the polyamide is polycaprolactam.
Claim 22
Dependent Claim
24 words
The film as recited in claims 13 or 17 wherein the platelet orientation factor O p of the filler is from 0.9 to 1.0.
Claim 23
Dependent Claim
23 words
The film laminate as recited in claims 13 or 17 wherein the filler in the one layer and the additional layer is talc.
Claim 24
Dependent Claim
26 words
The film laminate as recited in claims 20 wherein the one layer and the additional layer contains from 25 to 50 weight percent of the talc.
Claim 25
Dependent Claim
22 words
The film laminate as recited in claims 20 wherein the film laminate contains from 30 to 50 weight percent of the filler.
Claim 26
Dependent Claim
21 words
The film laminate as recited in claims 20 wherein the average diameter of the talc is from 1 to 5 micrometers.
Claim 27
Dependent Claim
21 words
The film as recited in claims 20 wherein the maximum equivalent diameter of the talc is from 5 to 25 micrometers.
Claim 28
Dependent Claim
19 words
The film as recited in claims 13 or 17 having a break elongation of greater than about 50 percent.
Claim 29
Dependent Claim
17 words
The film as recited in claim 25 having a break elongation of from 100 to 500 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |