Multilayer tube, assembly and method

• US 4,707,389 A
• Filed: 09/30/1983
• Issued: 11/17/1987
• Est. Priority Date: 09/30/1983
• Status: Expired due to Term

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Inventors: Ward, James R.
• Primary Examiner(s): Buffalow, Edith
• Application Number:
  US06/537,758
• Time in Patent Office: 1,509 Days
• Field of Search: 428/35, 428/36, 428/518, 428/520, 428/522, 383/904, 383/906
• US Class Current: 428/36.6
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 39/08 Tubes; Storage means specially adapted therefor
• CPC Class Codes: B32B 1/00 Layered products having a non-planar shape
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10S 383/904 Filling tube
• CPC Class Codes: Y10S 383/906 Dispensing feature
• CPC Class Codes: Y10T 428/1379 Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
• CPC Class Codes: Y10T 428/3192 Next to vinyl or vinylidene chloride polymer
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

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 another embodiment, a port and membrane tube assembly (18) is provided that includes the above-described 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.

Claims

1. A multilayered tube securable to a container constructed from ethylene-vinyl acetate the multilayered tube comprising an outer layer comprising ethylene-vinyl acetate for bonding the multilayered tube to the ethylene-vinyl acetate container, an inner layer comprising polyvinyl chloride for bonding to polyvinyl chloride material and a bonding layer between said outer and inner layers for bonding and preventing delamination of said inner and outer layers.

2. 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.

3. The multilayered tube of claim 1 wherein said bonding layer is relatively thin compared to said inner and outer layers.

4. The multilayered tube of claim 1 formed by coextruding the materials which form said outer, bonding and inner layers.

5. The multilayered tube of claim 1 wherein said layers are coaxial and cylindrical.

6. 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.

7. The multilayered tube of claim 1 wherein said ethylene-vinyl acetate of said outer layer contains about 28% vinyl acetate by weight.

8. The multilayered tube of claim 1 wherein the bonding layer is chosen from the group consisting of ethylene-vinyl acetate and low density polyethylene, and ethylene copolymer containing vinyl acetate and an acrylic based material.