EP0170385A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Nylon-based composition of matter, plastics films comprising a layer of same, and packages made from such plastics films
Assignee: Primerica Inc
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Filing: 1985-06-19
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Granted: —
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Expires: 2005-06-19
Abstract
Abstract The nylon-based composition is a blend or copolymer of nylon 6 and another nylon, e.g. nylon 66 or nylon 12, the latter being 2.5 to 10 mole percent of the overall composition. The blend can be 40 to 70 weight percet nylon 6 and 60 to 25 weight percent of a nylon copolymer which consists of 80 to 90% nylon 6 and 20 to 10% of the other nylon. A packaging film, (10) can have a first layer (18) of the said composition, a second layer )12) of a heat-sealable polymer such as low density polyethylene, a third, gas barrier layer (16) e.g. of ethylene vinyl alcohol copolymer and a fourth layer (14) between the second and third layers, the latter layer for instance being an ethylenic polymer or copolymer. The packaging film can be used for packaging moist products such as meat.
Inventors
- 👤 Samuel W. Tse
- 👤 Deane E. Galloway
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:16
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L77/00; C08L77/02; B32B2270/00; B32B2307/00; B32B2307/30; B32B2307/31; B32B2553/00
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
103 words
A composition of matter comprising nylon 6 in combination with another nylon, characterised in that the composition is either a blend of: (a) 40% to 75% by weight nylon 6; and (b) 60% to 25% by weight of a nylon copolymer which consists of 80% to 90% moieties of a first, nylon 6 polymer and 20% to 10% moieties of a second nylon polymer the overall composition of the blend comprising 2.5% to 10% moieties of the said second nylon polymer, or is a copolymer of nylon 6 and another nylon polymer, the latter being present in an amount of 2.5 to 10%.
Claim 2
Dependent Claim
103 words
A composition of matter comprising nylon 6 in combination with another nylon, characterised in that the composition is either a blend of: (a) 40% to 75% by weight nylon 6; and (b) 60% to 25% by weight of a nylon copolymer which consists of 80% to 90% moieties of a first, nylon 6 polymer and 20% to 10% moieties of a second nylon polymer the overall composition of the blend comprising 2.5% to 10% moieties of the said second nylon polymer, or is a copolymer of nylon 6 and another nylon polymer, the latter being present in an amount of 2.5 to 10%.
Claim 3
Dependent Claim
20 words
A composition according to claim 1, wherein the overall composition comprises 5% to 7.5% moieties of the second nylon polymer.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 or claim 2, wherein the second nylon polymer is nylon 66 or nylon 12.
Claim 5
Dependent Claim
14 words
A plastics film formed from the composition according to claim 1, 2 or 3.
Claim 6
Dependent Claim
39 words
A multiple layer film characterised by having a heat sealable layer on one surface thereof and a nylon layer on the opposite surface thereof, the said nylon layer being a blend composition according to claim 1, 2- or 3.
Claim 7
Dependent Claim
21 words
A film according to claim 5, characterised by including a functionally adhesive polymer layer between the heat sealable and nylon layers.
Claim 8
Dependent Claim
130 words
A multiple layer heat sealable film comprising (a) a first, heat sealable layer on one surface of the film; (b) a second, nylon layer on the other surface of the film; (c) a layer of ethylene vinyl alcohol copolymer between the first and second layers; and (d) a fourth, adhesive layer between the first and third layers, the said second layer comprising a blend of nylon polymer and nylon copolymer, in which blend 40% to 75% by weight being nylon 6 and 60% to 25% by weight being a nylon copolymer, the copolymer being 80% to 90% moieties of a first, nylon 6 polymer and 20% to 10% moieties of a second nylon polymer, the overall composition of said blend comprising 2.5% to 10% moieties of said second-polymer of nylon.
Claim 9
Dependent Claim
130 words
A multiple layer heat sealable film comprising (a) a first, heat sealable layer on one surface of the film; (b) a second, nylon layer on the other surface of the film; (c) a layer of ethylene vinyl alcohol copolymer between the first and second layers; and (d) a fourth, adhesive layer between the first and third layers, the said second layer comprising a blend of nylon polymer and nylon copolymer, in which blend 40% to 75% by weight being nylon 6 and 60% to 25% by weight being a nylon copolymer, the copolymer being 80% to 90% moieties of a first, nylon 6 polymer and 20% to 10% moieties of a second nylon polymer, the overall composition of said blend comprising 2.5% to 10% moieties of said second-polymer of nylon.
Claim 10
Dependent Claim
18 words
A film according to claim 7, characterised by the second nylon polymer comprising nylon 66 or nylon 12.
Claim 11
Dependent Claim
26 words
A film according to claim 7 or claim 8, characterised further by including a layer of polyethylene or polypropylene between the said second and third layers.
Claim 12
Dependent Claim
32 words
A film according to claim 7, 8 or 9, characterised further by including a layer of a polymer or copolymer of a polypropylene or polyethylene between the said first and fourth layers.
Claim 13
Dependent Claim
38 words
A film according to any of claims 7 to 10, characterised in that the said second nylon polymer comprises nylon 66 and is present as 5.0% to 5.5% of the overall blend composition of the said second layer.
Claim 14
Dependent Claim
38 words
A film according to any of claims 7 to 10, characterised in that the said second nylon polymer comprises nylon 66 and is present as 7.25% to 7.75% of the overall blend composition of the said second layer.
Claim 15
Dependent Claim
27 words
A film according to any of claims 7 to 12, characterised in that the said fourth layer is an adhesive based on an ethylene polymer or copolymer.
Claim 16
Dependent Claim
67 words
A film according to claim 9 or any claim dependent on claim 9, characterised in that the said first layer comprises Surlyn; the second layer is a blend of equal parts by weight of nylon 6 and a copolymer of nylon 6, 66, said copolymer comprising 85 mole percent nylon 6 and 15 mole percent nylon 66, and the fifth layer comprises a low density polyethylene adhesive.
Claim 17
Dependent Claim
33 words
A film according to claim 10 or any claim dependent on claim 10, characterised in that the composition of the sixth layer is chosen from low density polyethylene and ethylene vinyl acetate copolymer.
Claim 18
Dependent Claim
59 words
A film according to claim 15, characterised in that the composition of the second layer is a blend of about 65% by weight nylon 6 and 35% by weight of a copolymer of nylon, said copolymer being about 85 mole percent nylon 6 and 15 mole percent nylon 66, and wherein the composition of the first layer comprises Surlyn.
Claim 19
Dependent Claim
175 words
A package, including a containing packaging film and a moist product therein, the package being suitable for use in a moist environment, and being susceptible of being closed by heat sealing, characterised in that the packaging film has a first, heat sealable surface layer on that surface of the film disposed toward the interior of the package and a second, nylon surface layer on the surface of the film disposed toward the exterior of the package, the film further having a third layer of ethylene vinyl alcohol copolymer between the first and second layers, and a fourth layer of ethylene polymer or copolymer between the first and third layers, and wherein the said second layer comprises a blend of 40 % to 75 % by weight nylon 6, and 60% to 25% by weight of a nylon copolymer wherein the copolymer is 80% to 90% moieties of nylon 6 and 20% to 10% moieties of a second nylon polymer; the overall composition of the blend comprising 2.5% to 10% moieties of the second nylon polymer.
Claim 20
Dependent Claim
175 words
A package, including a containing packaging film and a moist product therein, the package being suitable for use in a moist environment, and being susceptible of being closed by heat sealing, characterised in that the packaging film has a first, heat sealable surface layer on that surface of the film disposed toward the interior of the package and a second, nylon surface layer on the surface of the film disposed toward the exterior of the package, the film further having a third layer of ethylene vinyl alcohol copolymer between the first and second layers, and a fourth layer of ethylene polymer or copolymer between the first and third layers, and wherein the said second layer comprises a blend of 40 % to 75 % by weight nylon 6, and 60% to 25% by weight of a nylon copolymer wherein the copolymer is 80% to 90% moieties of nylon 6 and 20% to 10% moieties of a second nylon polymer; the overall composition of the blend comprising 2.5% to 10% moieties of the second nylon polymer.
Claim 21
Dependent Claim
23 words
A package according to claim 17 further characterised by a fifth layer comprising polyethylene or polypropylene disposed between the second and third layers.
Claim 22
Dependent Claim
28 words
A package according to claim 17 or claim 18, characterised in that the overall composition of the second layer comprises 5% to 7.5% of said second nylon polymer.
Claim 23
Dependent Claim
25 words
A package according to claim 17, 18 or 19, characterised in that the said second nylon polymer is chosen from nylon 66 and nylon 12.
Claim 24
Dependent Claim
26 words
A package according to claim 17, characterised by including a layer of a polymer or copolymer of polypropylene or polyethylene between the first and fourth layers.
Claim 25
Dependent Claim
22 words
A package according to claim 21, characterised in that the overall composition of the second layer comprises 5.0% to 5.5% nylon 66.
Claim 26
Dependent Claim
22 words
A package according to claim 21 characterised in that the overall composition of the second layer comprises 7.25% to 7.75% nylon 66.
Claim 27
Dependent Claim
30 words
A package according to any of claims 21 to 23, characterised in that the composition of the sixth layer is chosen from low density polyethylene and ethylene vinyl acetate copolymer.
Claim 28
Dependent Claim
56 words
A package according to any of claims 17 to 24, characterised in that the first layer comprises Surlyn, and the second layer comprises a blend of about 65% by weight nylon 6 and 35% by weight of a copolymer of nylon, the copolymer being about 85 mole percent nylon 6 and 15 mole percent nylon 66.
Claim 29
Dependent Claim
64 words
A package according to claim 18 or any claim dependent thereon, characterised in that the first layer comprises Surlyn; the second layer is a blend of equal parts by weight of nylon 6 and a copolymer of nylon 6,66, the said copolymer comprising 85 mole percent nylon 6 and 15 mole percent nylon 66, and the fifth layer comprises a low density polyethylene adhesive.
Claim 30
Dependent Claim
70 words
A film comprising a first, heat sealable layer on one surface thereof and a second, nylon layer on the other surface thereof, and wherein the composition of the nylon layer is 90 to 97.5 mole percent nylon 6 and 10 to 2.5 mole percent of a second polymer of nylon, for example 92.5 to 95 mole percent nylon 6 and 7.5 to 5 mole percent of the second nylon polymer.
Claim 31
Dependent Claim
70 words
A film comprising a first, heat sealable layer on one surface thereof and a second, nylon layer on the other surface thereof, and wherein the composition of the nylon layer is 90 to 97.5 mole percent nylon 6 and 10 to 2.5 mole percent of a second polymer of nylon, for example 92.5 to 95 mole percent nylon 6 and 7.5 to 5 mole percent of the second nylon polymer.
Claim 32
Dependent Claim
19 words
A film according to claim 27 wherein the second nylon polymer is chosen from nylon 66 and nylon 12.
Claim 33
Dependent Claim
39 words
A film according to claim 27 or claim 28, further characterised by a third polymeric layer comprising ethylene vinyl alcohol copolymer between the first and second layers and by a fourth adhesive layer between the first and third layers.
Claim 34
Dependent Claim
108 words
A film according to claim 27, characterised in that the composition of the first layer is Surlyn, the composition of the second, nylon layer is 92.25 to 92.75 mole percent nylon 6 and 7.75 to 7.25 mole percent of the second nylon polymer, and the film further comprising a third layer of ethylene vinyl alcohol copolymer, a fourth, adhesive layer between the first and third layers, the adhesive fourth layer being based on a polymer chosen from ethylene vinyl acetate copolymer and low density polyethylene; and a fifth layer between the second and third layers, the fifth layer being based on a polymer chosen from polyethylene and polypropylene.
Claim 35
Dependent Claim
31 words
A film according to claim 30, characterised in that the adhesive fourth layer is based on ethylene vinyl acetate copolymer and the fifth layer is based on a low density polyethylene.
Claim 36
Dependent Claim
99 words
A film according to claim 27, characterised in that the composition of the first layer is Surlyn, the composition of the second, nylon layer is 94.5 to 95 mole percent nylon 6 and 5 to 5.5 mole percent of the second nylon polymer, the film further comprising a fourth adhesive layer between said first and third layers, the said adhesive fourth layer being based on a polymer chosen from ethylene vinyl acetate copolymer and low density polyethylene; and a sixth layer between the first and fourth layers, the sixth layer being a polymer or copolymer of polypropylene or polyethylene.
Claim 37
Dependent Claim
31 words
A film according to claim 32, characterised in that the adhesive fourth layer is based on ethylene vinyl acetate copolymer and the sixth layer is based on an ethylene vinyl acetate.
Claim 38
Dependent Claim
131 words
A package, including a containing packaging film and a moist product therein, the package being suitable for use in a moist environment, and being susceptible of being closed by heat sealing, characterised in that the packaging film has a first, heat sealable surface layer on the surface of the film disposed toward the interior of the package, a second surface layer of nylon on the surface of the film disposed toward the exterior of the package, a third layer of ethylene vinyl alcohol copolymer between said first and second layers, and a fourth layer of an adhesive comprising an ethylene polymer or copolymer between the first and third layers; the second layer comprising 90 to 97.5 mole percent nylon 6 and 10 to 2.5 mole percent of a second nylon polymer.
Claim 39
Dependent Claim
131 words
A package, including a containing packaging film and a moist product therein, the package being suitable for use in a moist environment, and being susceptible of being closed by heat sealing, characterised in that the packaging film has a first, heat sealable surface layer on the surface of the film disposed toward the interior of the package, a second surface layer of nylon on the surface of the film disposed toward the exterior of the package, a third layer of ethylene vinyl alcohol copolymer between said first and second layers, and a fourth layer of an adhesive comprising an ethylene polymer or copolymer between the first and third layers; the second layer comprising 90 to 97.5 mole percent nylon 6 and 10 to 2.5 mole percent of a second nylon polymer.
Claim 40
Dependent Claim
70 words
A package according to claim 34 characterised in that the composition of the first layer is Surlyn, the composition of the second layer is 92.25 to 92.75 mole percent nylon 6 and 7.75 to 7.25 mole percent nylon 66, and the composition of the fourth layer is based on ethylene vinyl acetate, the film further including a fifth layer based on low density polyethylene between said second and third layers.
Claim 41
Dependent Claim
72 words
A package according to claim 34, characterised in that the composition of the first layer is Surlyn, the composition of said second layer is 94.5 to 95 mole percent nylon 6 and 5 to 5.5 mole percent nylon 66, and the composition of the fourth layer is based on ethylene vinyl acetate, the film further including a sixth layer between the first and fourth layers which is based on ethylene vinyl acetate.
Claim 42
Dependent Claim
40 words
A composition of matter comprising nylon 6 in combination with another nylon, characterised in that the composition is a copolymer of nylon 6 and the other nylon, the latter being present in an amount of 2.5 to 10 mole percent.
Claim 43
Dependent Claim
40 words
A composition of matter comprising nylon 6 in combination with another nylon, characterised in that the composition is a copolymer of nylon 6 and the other nylon, the latter being present in an amount of 2.5 to 10 mole percent.
References Cited (Backward Citations)
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