EP0136848A2
Expired / Lapsed
EP
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Multilayer tube, assembly and method
Assignee: Clintec Nutrition Co
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Filing: 1984-09-06
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Granted: —
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Expires: 2004-09-06
Abstract
Abstract A multilayered tube (10) is provided that includes an outer layer (12) comprising ethylene-vinyl acetate for bonding to an ethylene-vinyl acetate material and an inner layer (14) comprising polyvinyl chloride for bonding to polyvinyl chloride material. A bonding layer (16) is provided between the outer and inner layers for bonding and preventing delamination of the outer and inner layers. In one embodiment, a port and membrane tube assembly (18) is provided that includes the multilayered tube and a polyvinyl chloride membrane tube bonded to the inner layer of the multilayered tube. The multilayered tube or the port and membrane tube assembly can be bonded to an ethylene-vinyl acetate container which can be used to store various types of solutions useful in medical treatment.
Inventors
- 👤 James R. Ward
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
B; B32; B32B; B32B1/00; B32B1/08; A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; A61M; A61M39/00; A61M39/08; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B32B7/00; B32B7/04; B32B7/12; A61M25/00; A61M25/0009; A61M25/0043; A61M25/0045; Y; Y10; Y10S; Y10S383/00; Y10S383/904; Y10S383/906; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A multilayered tube (10, 20) comprising an outer layer (12) comprising ethylene-vinyl acetate for bonding to ethylene-vinyl acetate material, an inner layer (14) comprising polyvinyl chloride for bonding to polyvinyl chloride material and a bonding layer (16) between said outer and inner layers for bonding and preventing delamination of said.inner and outer layers.
Claim 2
Dependent Claim
53 words
A multilayered tube (10, 20) comprising an outer layer (12) comprising ethylene-vinyl acetate for bonding to ethylene-vinyl acetate material, an inner layer (14) comprising polyvinyl chloride for bonding to polyvinyl chloride material and a bonding layer (16) between said outer and inner layers for bonding and preventing delamination of said.inner and outer layers.
Claim 3
Dependent Claim
33 words
The multilayered tube of Claim 1 wherein said outer and inner layers are bonded together by material comprising a coextrudable resin that is an adhesive for the ethylene-vinyl acetate and the polyvinyl chloride.
Claim 4
Dependent Claim
20 words
The multilayered tube of Claim 1 wherein said bonding layer is relatively thin compared to said inner and outer layers.
Claim 5
Dependent Claim
19 words
The multilayered tube of Claim 1 formed by coextruding the materials which form said outer, bonding and inner layers.
Claim 6
Dependent Claim
13 words
The multilayered tube of Claim 1 wherein said layers are coaxial and cylindrical.
Claim 7
Dependent Claim
33 words
The multilayered tube of Claim 1 wherein said ethylene-vinyl acetate of said outer layer contains from about 10% to about 32% vinyl acetate by weight and preferably about 28% vinyl acetate by weight.
Claim 8
Dependent Claim
34 words
A port and membrane tube assembly comprising a port tube (20) according to any preceding claim wherein the inner layer (14) is bonded to the membrane tube (22) and the latter comprises polyvinyl chloride.
Claim 9
Dependent Claim
19 words
The assembly of Claim 7 wherein said membrane tube is solvent bonded to said inner layer preferably with cyclohexanone.
Claim 10
Dependent Claim
59 words
A ported container (26) comprising a flexible ethylene-vinyl acetate bag (28), and at least one multilayered port tube (30, 32) attached to and communicating with the interior of said ethylene-vinyl acetate bag, said multilayered port tube being constructed according to any one of Claims 1 to 6, the outer layer (12) of the port tube being bonded.to the bag.
Claim 11
Dependent Claim
18 words
The ported container of Claim 9 wherein the port tube is bonded to the bag by R.F. energy.
Claim 12
Dependent Claim
22 words
The ported container of Claim 10 wherein the port tube forms part of an assembly constructed according to Claim 7 or 8.
Claim 13
Independent Claim
91 words
A method of making a port and membrane tube assembly comprising providing a multilayered port tube (20) having an outer layer (12) comprising ethylene-vinyl acetate for bonding to ethylene-vinyl acetate material, an inner layer (14) comprising polyvinyl chloride for bonding to polyvinyl chloride material and a bonding layer (16) between said outer and inner layers for bonding and preventing delamination of said outer and inner layers; providing a polyvinyl chloride membrane tube (22); and bonding the polyvinyl chloride membrane tube (22) to the inner layer (14) of said multilayered port tube.
Claim 14
Independent Claim
91 words
A method of making a port and membrane tube assembly comprising providing a multilayered port tube (20) having an outer layer (12) comprising ethylene-vinyl acetate for bonding to ethylene-vinyl acetate material, an inner layer (14) comprising polyvinyl chloride for bonding to polyvinyl chloride material and a bonding layer (16) between said outer and inner layers for bonding and preventing delamination of said outer and inner layers; providing a polyvinyl chloride membrane tube (22); and bonding the polyvinyl chloride membrane tube (22) to the inner layer (14) of said multilayered port tube.
References Cited (Backward Citations)
No citation records indexed.
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