US5241031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic articles having improved unload power and a process for their production
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1992-02-19
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Granted: 1993-08-31
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Expires: 2012-02-19
Abstract
Abstract Disclosed is a process for improving the unload power of a precursor elastic film comprising orienting the film to a draw ratio in the range of about 2:1 to about 20:1 followed by annealing. Further disclosed is an elastic film oriented to a draw ratio in the range of about 2:1 to about 20:1 and comprising a copolymer of ethylene polymerized with at least one comonomer selected from the group consisting of C 3 to C 20 alpha-olefins and C 3 to C 20 polyenes, wherein the copolymer has a density in the range of about 0.855 g/cm 3 to about 0.9 g/cm 3 , a melt index in the range of about 0.5 to about 50, with a composition distribution index at least about 45 percent.
Inventors
- 👤 Aspy K. Mehta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:57
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08F; C08F210/00; C08F210/16; C08F210/18; C08J2323/00; C08J2323/02; C08J2323/16; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
150 words
A process for improving the unload power of a precursor elastic film comprising orienting and annealing the film wherein the orientation is to a draw ratio in the range of about 2:1 to about 20:1 and the annealing is at a temperature between the softening point and melting point of the elastic film and the precursor film comprises a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C 3 to C 20 alpha-olefins and C 3 to C 20 polyenes, the plastomer has a density in the range of about 0.855 g/cm 3 to about 0.9 g/cm 3 , a melt index in the range of about 0.2 to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30 and a Composition Distribution Breadth Index (CDBI) of at least about 45 percent.
Claim 2
Dependent Claim
150 words
A process for improving the unload power of a precursor elastic film comprising orienting and annealing the film wherein the orientation is to a draw ratio in the range of about 2:1 to about 20:1 and the annealing is at a temperature between the softening point and melting point of the elastic film and the precursor film comprises a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C 3 to C 20 alpha-olefins and C 3 to C 20 polyenes, the plastomer has a density in the range of about 0.855 g/cm 3 to about 0.9 g/cm 3 , a melt index in the range of about 0.2 to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30 and a Composition Distribution Breadth Index (CDBI) of at least about 45 percent.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the precursor film is produced by slit-die extrusion.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the precursor film is produced by blown film extrusion.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the alpha-olefin is selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-octene and 1-dodecene.
Claim 6
Dependent Claim
62 words
The process of claim 1 wherein the plastomer has a density in the range of about 0.860 g/cm 3 to about 0.890 g/cm 3 , a melt index in the range of about 0.5 to about 50, a molecular weight distribution in the range of about 1.8 to about 10, and a Composition Distribution Breadth Index (CDBI) at least about 60 percent.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein the polyene is a diene selected from the group consisting of straight chain dienes, branched chain dienes and cyclic hydrocarbon dienes.
Claim 8
Dependent Claim
47 words
The process of claim 6 wherein the diene is selected from the group consisting of 1,3-butadiene, 1,4-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene, 3,7-dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, mixed isomers of dihydro myrcene and dihydroocimene, 1,3-cyclopentadiene, 1,4-cylcohexadiene, 1,5-cyclooctadiene and 1,5-cyclododecadiene, tetrahydroindene, methyl tetrahydroindene, dicyclopentadiene, bicyclo-(2,2,1)-hepta-2-5-diene, 5-methylene-2-norbornene (MNB), 5-propenyl-2-norbornene, 5-isopropylidene-2-norbornene, 5-(4-cyclopentenyl)-2-norbornene, 5-cyclohexylidene-2-norbornene, 5-vinyl-2-norbornene and norbornene.
Claim 9
Dependent Claim
30 words
The process of claim 1 wherein the plastomer comprises in the range of about 65 mole percent to about 93 mole percent ethylene (based on the total moles of monomer).
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein the plastomer comprises in the range of about 73 mole percent to about 88 mole percent ethylene (based on the total moles of monomer).
Claim 11
Dependent Claim
17 words
The process of claim 4 wherein the plastomer has an ethylene crystallinity less than about 20 percent.
Claim 12
Dependent Claim
99 words
An elastic film having been orientated to a draw ratio in the range of about 2:1 to about 20:1 said film comprising a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C 3 to C 20 alpha-olefins and C 3 to C 20 polyenes, said plastomer having a density in the range of about 0.855 g/cm 3 to about 0.9 g/cm 3 , a melt index in the range of about 0.5 to about 50, and a composition distribution breadth index of at least about 45 percent.
Claim 13
Dependent Claim
99 words
An elastic film having been orientated to a draw ratio in the range of about 2:1 to about 20:1 said film comprising a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C 3 to C 20 alpha-olefins and C 3 to C 20 polyenes, said plastomer having a density in the range of about 0.855 g/cm 3 to about 0.9 g/cm 3 , a melt index in the range of about 0.5 to about 50, and a composition distribution breadth index of at least about 45 percent.
Claim 14
Dependent Claim
63 words
The elastic film of claim 11 wherein the plastomer has a density in the range of about 0.860 g/cm 3 to about 0.890 g/cm 3 , a melt index in the range of about 0.5 to about 50, a molecular weight distribution in the range of about 1.8 to about 10, and a Composition Distribution Breadth Index (CDBI) at least about 60 percent.
Claim 15
Dependent Claim
28 words
The elastic film of claim 11 wherein the polyene is a diene selected from the group consisting of straight chain dienes, branched chain dienes and cyclic hydrocarbon dienes.
Claim 16
Dependent Claim
48 words
The elastic film of claim 13 wherein the diene is selected from the group consisting of 1,3-butadiene, 1,4-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene, 3,7-dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, mixed isomers of dihydro myrcene and dihydroocimene, 1,3-cyclopentadiene, 1,4-cylcohexadiene, 1,5-cyclooctadiene and 1,5-cyclododecadiene, tetrahydroindene, methyl tetrahydroindene, dicyclopentadiene, bicyclo-(2,2,1)-hepta-2-5-diene, 5-methylene-2-norbornene (MNB), 5-propenyl-2-norbornene, 5-isopropylidene-2-norbornene, 5-(4-cyclopentenyl)-2-norbornene, 5-cyclohexylidene-2-norbornene, 5-vinyl-2-norbornene and norbornene.
Claim 17
Dependent Claim
23 words
The elastic film of claim 11 wherein the alpha-olefin is selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-octene and 1-dodecene.
Claim 18
Dependent Claim
31 words
The elastic film of claim 11 wherein the plastomer comprises in the range of about 65 mole percent to about 93 mole percent ethylene (based on the total moles of monomer).
Claim 19
Dependent Claim
31 words
The elastic film of claim 11 wherein the plastomer comprises in the range of about 73 mole percent to about 88 mole percent ethylene (based on the total moles of monomer).
Claim 20
Dependent Claim
18 words
The elastic film of claim 11 wherein the plastomer has an ethylene crystallinity less than about 20 percent.
Claim 21
Dependent Claim
121 words
An elastic film having improved unload power, comprising the product of orienting and annealing a precursor elastic film to a draw ratio in the range of about 2:1 to about 20:1 and the precursor film comprises a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C3 to C20 alpha-olefins and C3 to C20 polyenes, the plastomer has a density in the range of about 0.855 g/cm3 to about 0.9 g/cm3, a melt index in the range of about 0.2 to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30, and a Composition Distribution Breadth Index (CDBI) of at least about 45 percent.
Claim 22
Dependent Claim
121 words
An elastic film having improved unload power, comprising the product of orienting and annealing a precursor elastic film to a draw ratio in the range of about 2:1 to about 20:1 and the precursor film comprises a plastomer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C3 to C20 alpha-olefins and C3 to C20 polyenes, the plastomer has a density in the range of about 0.855 g/cm3 to about 0.9 g/cm3, a melt index in the range of about 0.2 to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30, and a Composition Distribution Breadth Index (CDBI) of at least about 45 percent.
Claim 23
Dependent Claim
62 words
The process of claim 19 wherein the plastomer has a density in the range of about 0.860 g/cm 3 to about 0.890 g/cm 3 , a melt index in the range of about 0.5 to about 50, a molecular weight distribution in the range of about 1.8 to about 10, and a Composition Distribution Breadth Index (CDBI) at least about 60 percent.
Claim 24
Dependent Claim
27 words
The process of claim 19 wherein the polyene is a diene selected from the group consisting of straight chain dienes, branched chain dienes and cyclic hydrocarbon dienes.
Claim 25
Dependent Claim
48 words
The elastic film of claim 21 wherein the diene is selected from the group consisting of 1,3-butadiene, 1,4-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene, 3,7-dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, mixed isomers of dihydro myrcene and dihydroocimene, 1,3-cyclopentadiene, 1,4-cylcohexadiene, 1,5-cyclooctadiene and 1,5-cyclododecadiene, tetrahydroindene, methyl tetrahydroindene, dicyclopentadiene, bicyclo-(2,2,1)-hepta-2-5-diene, 5-methylene-2-norbornene (MNB), 5-propenyl-2-norbornene, 5-isopropylidene-2-norbornene, 5-(4-cyclopentenyl)-2-norbornene, 5-cyclohexylidene-2-norbornene, 5-vinyl-2-norbornene and norbornene.
Claim 26
Dependent Claim
23 words
The elastic film of claim 19 wherein the alpha-olefin is selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-octene and 1-dodecene
Claim 27
Dependent Claim
31 words
The elastic film of claim 19 wherein the plastomer comprises in the range of about 65 mole percent to about 93 mole percent ethylene (based on the total moles of monomer).
Claim 28
Dependent Claim
31 words
The elastic film of claim 19 wherein the plastomer comprises in the range of about 73 mole percent to about 88 mole percent ethylene (based on the total moles of monomer).
Claim 29
Dependent Claim
18 words
The elastic film of claim 19 wherein the plastomer has an ethylene crystallinity less than about 20 percent.
References Cited (Backward Citations)
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