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US 5,674,944 AGranted
Batch inclusion packages
AssigneeThe Dow Chemical Company
InventorsDaniel James Falla, Debbie-Lee Walker
Life of this patent
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Abstract
Batch inclusion packages made from films and film structures are disclosed. The films and film structures have at least one layer of at least one substantially linear ethylene/.alpha.-olefin polymer. The batch inclusion packages are useful in wrapping or containing various materials, such as carbon black, titanium dioxide, and rubber compounding ingredients.
Claims3
A batch inclusion package comprising
- (A) an ingredient to be packaged by
- (B) a protective film comprising at least one layer of at least one substantially linear ethylene/.alpha.-olefin polymer,
- wherein the ingredient (A) is discreet from the protective film (B) but wherein the ingredient (A) and the protective film (B) are incorporated into a final article, and wherein the substantially linear ethylene/.alpha.-olefin polymer is characterized as having:
- a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63,
- b) a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation:
- M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2,)-4.63, and
- c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylene/.alpha.-olefin polymer having about the same I.sub.2 and M.sub.w /M.sub.n, and
- wherein the protective film layer (B) comprises a blend of the substantially linear ethylene/.alpha.-olefin polymer and a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.
5 more elements
A batch inclusion package comprising
- (A) an ingredient to be packaged by
- (B) a protective film comprising at least one layer of at least one substantially linear ethylene/.alpha.-olefin polymer,
- wherein the ingredient (A) is discreet from the protective film (B), but wherein the ingredient (A) and the protective film (B) are incorporated into a final article, and wherein the substantially linear ethylene/.alpha.-olefin polymer is characterized as having:
- a) a melt flow ratio, I.sub.10 /I.sub.2,.gtoreq.5.63,
- b) a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation:
- M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, and
- c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylene/.alpha.-olefin polymer having about the same I.sub.2 and M.sub.w /M.sub.n, and
- wherein the protective film layer (B) comprises a layer of the substantially linear ethylene/.alpha.-olefin polymer and at least one layer of a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.
5 more elements
A batch inclusion package comprising:
- (A) an ingredient to be packaged by
- (B) a protective film comprising at least one layer of at least one substantially linear ethylene/.alpha.-olefin polymer,
- wherein the ingredient (A) is discreet from the protective film (B) but wherein the ingredient (A) and the protective film (B) are incorporated into a final article and wherein the substantially linear ethylene/.alpha.-olefin polymer is characterized as having:
- a) a melt flow ratio, I.sub.10 /I.sub.2,>5.63, and
- b) a molecular weight distribution, M.sub.w /M.sub.n, from about 1.5 to about 2.5, and
- wherein the protective film layer (B) comprises a blend of the substantially linear ethylene/.alpha.-olefin polymer and a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.
3 more elements
Dependencies are inferred from the claim text.