Thermoplastic packaging film of low I10 /I2

Claim 2

A heat-shrinkable packaging film of improved abuse resistance comprising at least one layer of a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 melt flow ratio of about 7.2 when said alpha-olefin is octene or (b) a low I 10 /I 2 melt flow ratio of about 9.9 and a comonomer of hexene.

Claim 3

The film of claim 1, wherein said copolymer of ethylene and an alpha-olefin of low I 10 /I 2 ratio is in blend with another polymer compatible therewith.

Claim 4

The film of claim 2, wherein said layer of ethylene/alpha-olefin copolymer having a low I 10 /I 2 ratio further includes up to 50% by weight, based on the layer composition, of a polymer which is compatible with said ethylene/alpha-olefin copolymer and is selected from ethylene/alkyl-acrylate copolymer, high density polyethylene (HDPE), linear medium density polyethylene (LMDPE), linear high density polyethylene (LHDPE), low density polyethylene (LDPE), medium density polyethyle (MDPE), ethylene/vinyl acetate (EVA), acid-modified EVA, polypropylene, ethylene/propylene copolymers, copolymers of an alpha-olefin having the formula RHC═CH 2 wherein R is H or C 1 to C 8 alkyl and an alpha, beta-ethylenically unsaturated carboxylic acid, and mixtures thereof.

Claim 5

The film of claim 1, wherein said film is a multilayer film including a barrier layer.

Claim 6

The film of claim 1, wherein said film is a multi-layer film and at least one layer of copolymer of ethylene/alpha-olefin of low I 10 /I 2 ratio is an interior layer of the multi-layer film.

Claim 7

The film of claim 1, wherein said at least one layer of ethylene/alpha-olefin copolymer of low I 10 /I 2 ratio has been irradiated at a dosage up to about 20 MR.

Claim 8

A bag formed from the film of claim 1, said bag having end seal(s), side seal(s), or a combination thereof.

Claim 9

The bag of claim 7, wherein the film of the bag is a multi-layer film including a barrier layer.

Claim 10

The bag of claim 8, wherein at least one layer of copolymer of ethylene/alpha-olefin of low I 10 /I 2 ratio is an interior layer of the multi-layer film.

Claim 11

The bag of claim 7, wherein the film of the bag is a heat-shrinkable film.

Claim 12

A thermoplastic, heat-shrinkable packaging film of improved abuse resistance comprising (I) a layer of a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 ratio of about 7.2 when said alpha-olefin is octene or (b) a low I 10 /I 2 ratio of about 9.9 and a comonomer of hexene, and (II) a layer of barrier material.

Claim 13

A thermoplastic, heat-shrinkable packaging film of improved abuse resistance comprising (I) a layer of a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 ratio of about 7.2 when said alpha-olefin is octene or (b) a low I 10 /I 2 ratio of about 9.9 and a comonomer of hexene, and (II) a layer of barrier material.

Claim 14

A heat-shrinkable packaging film of improved abuse resistance comprising a layer of a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 melt flow ratio of about 7.2 and a comonomer of octene or (b) a low I 10 /I 2 melt flow ratio of about 9.9 when said alpha-olefin is hexene, said ethylene/alpha-olefin copolymer having a comparatively lower I 10 /I 2 ratio than the corresponding ethylene/alpha-olefin copolymer with the same comonomer and essentially the same density but a comparatively higher I 10 /I 2 ratio, said packaging film exhibiting better abuse resistance than the corresponding film made of the ethylene/alpha-olefin copolymer having the higher I 10 /I 2 ratio, wherein said lower I 10 /I 2 ratio and said higher I 10 /I 2 ratio differ by an amount above about 0.5.

Claim 15

A heat-shrinkable packaging film of improved abuse resistance comprising a layer of a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 melt flow ratio of about 7.2 and a comonomer of octene or (b) a low I 10 /I 2 melt flow ratio of about 9.9 when said alpha-olefin is hexene, said ethylene/alpha-olefin copolymer having a comparatively lower I 10 /I 2 ratio than the corresponding ethylene/alpha-olefin copolymer with the same comonomer and essentially the same density but a comparatively higher I 10 /I 2 ratio, said packaging film exhibiting better abuse resistance than the corresponding film made of the ethylene/alpha-olefin copolymer having the higher I 10 /I 2 ratio, wherein said lower I 10 /I 2 ratio and said higher I 10 /I 2 ratio differ by an amount above about 0.5.

Claim 16

A thermoplastic, mult-layer, heat-shrinkable packaging film having excellent abuse resistance, comprising in direct surface-to-surface contact at least the 4-layer structure: an outside polymer layer, a barrier layer, and interior layer, a heat sealing layer, wherein said interior layer comprises a linear copolymer of ethylene and an a alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 melt flow ratio of about 7.2 when said alpha-olefin is octene or (b) a low I 10 /I 2 melt flow ratio of about 9.9 and a comonomer of hexene.

Claim 17

A thermoplastic, mult-layer, heat-shrinkable packaging film having excellent abuse resistance, comprising in direct surface-to-surface contact at least the 4-layer structure: an outside polymer layer, a barrier layer, and interior layer, a heat sealing layer, wherein said interior layer comprises a linear copolymer of ethylene and an a alpha-olefin with a density of about 0.935 g/cc or less selected from ethylene/alpha-olefin copolymer having (a) a low I 10 /I 2 melt flow ratio of about 7.2 when said alpha-olefin is octene or (b) a low I 10 /I 2 melt flow ratio of about 9.9 and a comonomer of hexene.

Claim 18

The film of claim 13, wherein said interior layer further includes up to 50% by weight, based on the layer composition, of a polymer which is compatible with said ethylene/alpha-olefin copolymer and is selected from ethylene/alkyl-acrylate copolymer, high density polyethylene (HDPE), linear medium density polyethylene (LMDPE), linear high density polyethylene (LHDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), ethylene/vinyl acetate (EVA), acid-modified EVA, polypropylene, ethylene/propylene copolymers, copolymers of an alpha-olefin having the formula RHC═CH 2 wherein R is H or C 1 to C 8 alkyl and an alpha, beta-ethylenically unsaturated carboxylic acid, and mixtures thereof.

Claim 19

The film of claim 13, wherein said interior layer of ethylene/alpha-olefin having a low I 10 /I 2 ratio has been irradiated at a dosage up to about 20 MR.