Patent EP0076366A2 successfully refreshed from Google Patents.
EP0076366A2
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EP
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Multilayer tubular body with uncentered barrier layer
Assignee: Ball Corp
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Filing: 1982-07-21
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Granted: —
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Expires: 2002-07-21
Abstract
Abstract A multilayered structure is described that is useful in making containers, the structure having at least one low gas permeable layer specifically located in the multilayered structure so that there is substantial reduction in the formation of unwanted inclusions formed during coextrusion processes. In particular, the structure is a tubular body which comprises a plurality of layers of different polymeric materials united or bonded together, said structure having at least one uncentered layer of low gas permeability, said layer having an average thickness in the range of about 1 to 20 percent of the total thickness of the body. The structure may be readily made by forming a series of melted thermoplastic streams, enveloping the series of melted streams to successively form separate and defined layers one upon the other, and introducing a layer of low gas permeable material into the series proximate the exterior portion of the structure. The low gas permeable material may be polyvinylidene chloride copolymer, poly(vinyl alcohol-coethylene) or acrylonitrile-containing polymers.
Inventors
- 👤 Jeffrey Noel Dugal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/336; B29C48/3363; B29C49/00; B29C49/22; B32; B32B; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/082; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/70; B32B2307/724
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
61 words
A rigid coextruded thermoplastic body comprising a plurality of layers of different polymeric materials bonded together, said body having at least one uncentered layer of low gas permeability situated proximate the surface of said body, said uncentered layer having an average thickness in the range of from about 1 percent to about 20 percent of the total thickness of the body.
Claim 2
Dependent Claim
61 words
A rigid coextruded thermoplastic body comprising a plurality of layers of different polymeric materials bonded together, said body having at least one uncentered layer of low gas permeability situated proximate the surface of said body, said uncentered layer having an average thickness in the range of from about 1 percent to about 20 percent of the total thickness of the body.
Claim 3
Dependent Claim
30 words
The thermoplastic body of Claim 1 wherein the polymeric materials are in the form of a tube and the at least one uncentered layer is proximate the exterior surface thereof.
Claim 4
Dependent Claim
31 words
The thermoplastic body of Claim 1 wherein the at least one uncentered layer of low permeability is selected from the group consisting of polyvinylidene chloride copolymers, poly(vinyl alcohol-co-ethylene) and acrylonitrile-containing polymers.
Claim 5
Dependent Claim
23 words
The thermoplastic body of Claim 1 wherein layers of polymeric material are polymers selected from the group consisting of polyolefins, polystyrenes and polyesters.
Claim 6
Dependent Claim
55 words
A nonflexible tubular article comprising a plurality of polymeric layers, one of said polymeric layers having barrier properties and being situated proximate the exterior surface of said tubular article, said one of said layers having an average thickness of from about 1 percent to about 20 percent of the total thickness of the tubular article.
Claim 7
Dependent Claim
55 words
A nonflexible tubular article comprising a plurality of polymeric layers, one of said polymeric layers having barrier properties and being situated proximate the exterior surface of said tubular article, said one of said layers having an average thickness of from about 1 percent to about 20 percent of the total thickness of the tubular article.
Claim 8
Dependent Claim
64 words
A nonflexible tubular article comprising a plurality of polymeric layers, one of said polymeric layers having barrier properties, said article being formed by simultaneously coextruding and bonding the polymeric layers together as a series of melted streams with the barrier layer being located proximate the exterior surface and having a thickness of from about 1 percent to about 20 percent of the total thickness.
Claim 9
Dependent Claim
64 words
A nonflexible tubular article comprising a plurality of polymeric layers, one of said polymeric layers having barrier properties, said article being formed by simultaneously coextruding and bonding the polymeric layers together as a series of melted streams with the barrier layer being located proximate the exterior surface and having a thickness of from about 1 percent to about 20 percent of the total thickness.
Claim 10
Dependent Claim
16 words
The tubular article as in Claim 5.or 6 Therein the barrier layer is polyvinylidene chloride copolymer.
Claim 11
Dependent Claim
18 words
8 . The tubular article as in Claim 5 or 6 wherein the barrier layer is poly(vinyl alcohol-co-ethylene).
Claim 12
Dependent Claim
16 words
The tubular article as in Claim 5 or 6 wherein the barrier layer is acrylonitrile-containing polymers.
Claim 13
Dependent Claim
33 words
The tubular article as in Claim 5 or 6 wherein the layer having the barrier properties has an average thickness of from about 2 percent to about 12 percent of the total thickness.
Claim 14
Dependent Claim
31 words
The tubular article as in claim 5 or 6 wherein the-layer having barrier properties has an average thickness of from about 3 percent to about 10 percent of the total thickness.
Claim 15
Dependent Claim
26 words
The tubular article as in Claim 5 or 6 wherein the layer having barrier properties is within the outer about one-third total thickness of the article.
Claim 16
Dependent Claim
26 words
The tubular article as in Claim 5 or 6 wherein the layer having barrier properties is within the outer about one-quarter total thickness of the article.
Claim 17
Dependent Claim
77 words
A nonflexible multilayered tubular body capable of being biaxially oriented into a container possessing excellent low gas permeability, said tubular body being formed by simultaneously coextruding and bonding polymeric streams together to form a series of layers, one layer consisting essentially of polyvinylidene chloride copolymer and situated proximate the exterior surface of said article, said one layer having an average thickness of from about 1 percent to about 20 percent of the total thickness of said article.
Claim 18
Dependent Claim
77 words
A nonflexible multilayered tubular body capable of being biaxially oriented into a container possessing excellent low gas permeability, said tubular body being formed by simultaneously coextruding and bonding polymeric streams together to form a series of layers, one layer consisting essentially of polyvinylidene chloride copolymer and situated proximate the exterior surface of said article, said one layer having an average thickness of from about 1 percent to about 20 percent of the total thickness of said article.
Claim 19
Dependent Claim
29 words
The tubular article of Claim 14 wherein the polyvinylidene chloride copolymer layer has an average thickness of from about 2 percent to about 12 percent of the total thickness.
Claim 20
Dependent Claim
30 words
16 . The tubular article in Claim 14 wherein the polyvinylidene chloride layer has an average thickness of from about 3 percent to about 10 percent of the total thickness.
Claim 21
Independent Claim
64 words
A method of substantially reducing gaseous inclusions in coextruding a solid tubular body having a barrier layer therein ; which comprises, forming a series of melted streams of resinous materials, enveloping the series of melted streams to successively form separate and defined layers one upon the other, and introducing the barrier layer into said series proximate the exterior portion of said solid tubular body.
Claim 22
Independent Claim
64 words
A method of substantially reducing gaseous inclusions in coextruding a solid tubular body having a barrier layer therein ; which comprises, forming a series of melted streams of resinous materials, enveloping the series of melted streams to successively form separate and defined layers one upon the other, and introducing the barrier layer into said series proximate the exterior portion of said solid tubular body.
Claim 23
Dependent Claim
25 words
A method as in Claim 17 wherein said barrier layer is selected from the group consisting of polyvinylidene chloride copolymers, poly(vinyl alcohol-co-ethylene) and acrylonitrile-containing polymers.
Claim 24
Dependent Claim
25 words
A method as recited in Claim 17 wherein the series of melted streams includes polymers selected from the group consisting of polyolefins, polystyrenes and polyesters.
Claim 25
Dependent Claim
21 words
A method as recited in Claim 17 wherein said barrier layer is introduced within the outer about one-third series of layers.
Claim 26
Dependent Claim
21 words
A method as recited in Claim 17 wherein the barrier layer is introduced within the outer about one-quarter series of layers.
Claim 27
Dependent Claim
34 words
A method as in Claim 17 wherein the barrier layer is introduced to form an average thickness of between about 1 percent and about 20 percent of the total thickness of the tubular article.
Claim 28
Independent Claim
31 words
A method as in Claim17- wherein the barrier layer is introduced to form an average thickness of between about 2 and 12 percent of the total thickness of the tubular article.
Claim 29
Dependent Claim
32 words
A method as in Claim 17 wherein the barrier layer is introduced to form an average thickness of between about 3 and 10 percent of the total thickness of the tubular article.
Claim 30
Dependent Claim
65 words
. A multilayered tubular body having one barrier layer therein, said body being substantially free of inclusions and formed by the process of providing a series of melted streams of polymeric materials, enveloping said series of melted streams to successively form separate and defined layers one upon the other, and introducing the barrier layer into said series proximate the exterior portion of said tubular body.
Claim 31
Dependent Claim
65 words
. A multilayered tubular body having one barrier layer therein, said body being substantially free of inclusions and formed by the process of providing a series of melted streams of polymeric materials, enveloping said series of melted streams to successively form separate and defined layers one upon the other, and introducing the barrier layer into said series proximate the exterior portion of said tubular body.
Claim 32
Dependent Claim
26 words
The tubular body of Claim 25 wherein the barrier layer is selected from the group consisting of polyvinylidene chloride copolymer, poly(vinyl alcohol-co-ethylene) and acrylonitrile containing polymers.
Claim 33
Dependent Claim
27 words
2 7. The tubular body of Claim 25 wherein the series of melted streams includes polymeric materials selected from the group consisting of polyolefins, polystyrenes and polyesters.
Claim 34
Dependent Claim
20 words
The tubular body of Claim 25 wherein the barrier layer is introduced within the outer about one-third series of layers.
Claim 35
Dependent Claim
20 words
The tubular body of Claim 25 wherein the barrier layer is introduced within the outer about one-quarter series of layers.
Claim 36
Dependent Claim
34 words
The tubular body of Claim 25 wherein the barrier layer is introduced to form an average thickness of between about 1 percent to about 20 percent of the total thickness of the tubular article.
Claim 37
Dependent Claim
14 words
The tubular body of Claim 25 wherein the barrier layer is polyvinylidene chloride copolymer.
References Cited (Backward Citations)
No citation records indexed.
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