CA2526873A1 - Film layers made from ethylene polymer blends - Google Patents

Film layers made from ethylene polymer blends Download PDF

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Publication number
CA2526873A1
CA2526873A1 CA002526873A CA2526873A CA2526873A1 CA 2526873 A1 CA2526873 A1 CA 2526873A1 CA 002526873 A CA002526873 A CA 002526873A CA 2526873 A CA2526873 A CA 2526873A CA 2526873 A1 CA2526873 A1 CA 2526873A1
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CA
Canada
Prior art keywords
composition
ethylene
alpha
percent
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002526873A
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French (fr)
Other versions
CA2526873C (en
Inventor
Jeffrey J. Wooster
Thomas T. Oswald
Staci A. Dekunder
Jesus Nieto
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Dow Global Technologies LLC
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Individual
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Publication of CA2526873A1 publication Critical patent/CA2526873A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Abstract

Film layers made from formulated ethylene polymer compositions are disclosed.
Film layers made from such formulated compositions have surprisingly good heat seal properties, and an especially good reduction in heat seal initiation temperature. The ethylene polymer compositions have at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one homogeneously or heterogeneously branched ethylene polymer which has a lower melt index than the first mentioned component. The first homogeneously branched ethylene/alpha-olefin interpolymer has a melt index higher than that of the formulated composition.

Claims (23)

1. A film layer made from a polymer composition, wherein the composition comprises (A) from 10 percent (by weight of the total composition) to 95 percent (by weight of the total composition) of at least one homogeneously branched ethylene/alpha-olefin interpolymer having:
(i) a density from 0.86 grams/cubic centimeter (g/cm3) to 0.92 g/cm3, (ii) a molecular weight distribution (Mw /Mn) from 1.8 to 2.8, (iii)a melt index (I2) from 0.2 grams/10 minutes (g/10min) to 200 g/10 min, (iv) substantially no high density fraction; and (B) from 5 percent (by weight of the total composition) to 90 percent (by weight of the total composition) of at least one heterogeneously branched ethylene polymer having a density from 0.88 g/cm3 to 0.945 g/cm3;
wherein the polymer composition has a melt index lower than the melt index of component (A).
2. A film layer made from a polymer composition, wherein the composition comprises (C) from 10 percent (by weight of the total composition) to 95 percent (by weight of the total composition) of at least one homogeneously branched ethylene/alpha-olefin interpolymer having:
(i) a density from 0.86 grams/cubic centimeter (g/cm3) to 0.92 g/cm3, (ii) a molecular weight distribution (Mw /Mn) from 1.8 to 2.8, (iii)a melt index (I2) from 0.2 grams/10 minutes (g/10min) to 200 g/10 mm, (iv) substantially no high density fraction; and (D) from 5 percent (by weight of the total composition) to 90 percent (by weight of the total composition) of at least one homogeneously branched ethylene polymer having a density higher than component (A) and wherein the density is from 0.88 g/cm3 to 0.945 g/cm3;
wherein the polymer composition has a melt index lower than the melt index of the component (A).
3. The film layer of claim 1 or 2 having a heat seal initiation temperature of no greater than 105 °C.
4. The film layer of claim 1 or 2, wherein the composition has a melt index from 0.5 grams/10 minutes to 30 grams/10 minutes.
5. A film layer made from a polymer composition, wherein the composition has an ATREF-DV characterized by having at least 1 low temperature peak between 30°C and 90°C, wherein the lowest temperature peak has an Mv which is at least 6 percent lower than the average Mv of the composition.
6. The film layer of claim 1 or 2 wherein the homogeneously branched ethylene/alpha olefin polymer of component (A) is an interpolymer of ethylene with at least one C3-C20 alpha-olefin.
7. The film layer of claim 1 wherein the heterogeneously branched ethylene polymer is a copolymer of ethylene and a C3-C20 alpha-olefin.
8. The film layer of claim 1 wherein the heterogeneously branched ethylene polymer is a copolymer of ethylene and 1-octene.
9. The film layer of claim 5 wherein the polymer composition includes a homogeneously branched ethylene/alpha-olefin copolymer which is a copolymer of ethylene and 1-octene.
10. In a composition comprising at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one heterogeneously branched ethylene/alpha-olefin interpolymer, the improvement comprising the composition having an ATREF-DV
characterized by having at least 1 low temperature peak between 30°C
and 90°C, wherein the lowest temperature peak has an Mv lower than the average Mv of the composition.
11. A film layer made from a polymer composition, wherein the composition comprises (A) from 10 percent (by weight of the total composition) to 95 percent (by weight of the total composition) of at least one ethylene/alpha-olefin interpolymer having:
(i) a density from 0.86 grams/cubic centimeter (g/cm3) to 0.92 g/cm3, (ii) a molecular weight distribution (Mw/Mn) from 1.8 to 2.8, (iii)a melt index (I2) from 0.2 grams/10 minutes (g/10 min) to 200 g/10 min, (iv) substantially no high density fraction; and (B) from 5 percent (by weight of the total composition) to 90 percent (by weight of the total composition) of at least one ethylene polymer having a density from 0.88 g/cm3 to 0.945 g/cm3, wherein the composition has a melt index lower than the melt index of (A).
12. In a composition comprising at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one other ethylene polymer, the improvement comprising the composition having an ATREF-DV characterized by having at least low temperature peak between 30C and 90C, wherein the low temperature peak has an My lower than the average My of the composition.
13. The film layer of claim 1 wherein (B) has a density higher than the density of the composition.
14. The improvement of claim 10 wherein the homogeneously branched substantially linear ethylene/alpha-olefin interpolymer is an interpolymer of ethylene with at least one C3-C20 alpha-olefin.
15. The improvement of claim 10 wherein the homogeneously branched substantially linear ethylene/alpha-olefin interpolymer is a copolymer of ethylene and a C3-C20 alpha-olefin.
16. The improvement of claim 10 wherein the homogeneously branched substantially linear ethylene/alpha-olefin interpolymer is a copolymer of ethylene and 1-octene.
17. The improvement of claim 10 wherein the heterogeneously branched ethylene polymer is a copolymer of ethylene and a C3-C20 alpha-olefin.
18. The improvement of claim 10 wherein the heterogeneously branched ethylene polymer is a copolymer of ethylene and 1-octene.
19. The film of claims 1, 2 or 4, or the composition of claims 10 or 12, wherein the composition comprises more than 40 percent (by weight of the total composition) of Component (A)
20. A film layer made from a polymer composition, wherein the composition comprises (A) from 10 percent (by weight of the total composition) to 95 percent (by weight of the total composition) of at least one homogeneously branched ethylene/alpha olefin interpolymer having:
(i) a density from 0.86 grams/cubic centimeter (g/cm3) to 0.92 g/cm3, (ii) a molecular weight distribution (Mw /Mn) from 1.8 to 2.8, (iii) a melt index (I2) from 0.2 grams/10 minutes (g/10min) to 200 g/10 min, (iv) substantially no high density fraction; and (B) from 5 percent (by weight of the total composition) to 90 percent (by weight of the total composition) of at least one homogeneously branched ethylene polymer having a density from 0.88 g/cm3 to 0.945 g/cm3; and a molecular weight distribution (Mw /Mn) from 1.8 to 2.8, wherein the polymer composition as a whole has a melt index lower than the melt index of component (A).
21. A film layer made from a polymer composition, wherein the composition has a CRYSTAF-LS characterized by having a lowest temperature peak between 30°C and 90°C, wherein the lowest temperature peak has an Mw which is at least 6 percent lower than the average Mw of the composition.
22. In a composition comprising at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one heterogeneously branched ethylene/alpha-olefin interpolymer, the improvement comprising the composition having a CRYSTAF-LS
characterized by having at least 1 low temperature peak between 30°C
and 90°C, wherein the lowest temperature peak has an Mw lower than the average Mw of the composition.
23. In a composition comprising at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one other ethylene polymer, the improvement comprising the composition having a CRYSTAF-LS characterized by having at least 1 low temperature peak between 30°C and 90°C, wherein the low temperature peak has an Mw lower than the average Mw of the composition.
CA2526873A 2003-06-10 2004-06-02 Film layers made from ethylene polymer blends Active CA2526873C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47724403P 2003-06-10 2003-06-10
US60/477,244 2003-06-10
PCT/US2004/017447 WO2004111123A1 (en) 2003-06-10 2004-06-02 Film layers made from ethylene polymer blends

Publications (2)

Publication Number Publication Date
CA2526873A1 true CA2526873A1 (en) 2004-12-23
CA2526873C CA2526873C (en) 2012-05-22

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Country Status (13)

Country Link
US (1) US7659343B2 (en)
EP (1) EP1636311B1 (en)
JP (1) JP4928944B2 (en)
KR (1) KR101125333B1 (en)
CN (1) CN1806004B (en)
AR (1) AR044655A1 (en)
AU (1) AU2004247669B2 (en)
BR (1) BRPI0411408A (en)
CA (1) CA2526873C (en)
ES (1) ES2606780T3 (en)
MX (1) MXPA05013347A (en)
MY (1) MY142043A (en)
WO (1) WO2004111123A1 (en)

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US8978346B2 (en) 2010-04-16 2015-03-17 Liqui-Box Corporation Multi-layer, ethylene polymer-based films with high-density polyethylene based stiffening layer
US9283736B2 (en) 2010-04-16 2016-03-15 Liqui-Box Corporation Multi-layer, ethylene polymer-based films with novel polypropylene blend-based stiffening layer
US9533477B2 (en) 2010-04-16 2017-01-03 Liqui-Box Corporation Multi-layer, ethylene polymer-based films with polypropylene-based stiffening layer
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AR044655A1 (en) 2005-09-21
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CN1806004B (en) 2010-06-16
JP4928944B2 (en) 2012-05-09

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