Connector member for dissimilar materials

• US 4,327,726 A
• Filed: 08/15/1979
• Issued: 05/04/1982
• Est. Priority Date: 08/15/1979
• Status: Expired due to Term

• Current Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Original Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Inventors: Kwong, Peter C., Laurin, Dean G.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Swisher, Nancy A. B.
• Application Number:
  US06/067,068
• Time in Patent Office: 993 Days
• Field of Search: 128/272, 285/DIG. 20, 285/21, 285/423, 525/92, 150/8
• US Class Current: 604/262
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: B29C 45/00 Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection blow-moulding B29C49/06
• CPC Class Codes: B29C 65/00 Joining or sealing of preformed parts , e.g. welding of plastics materials; Apparatus therefor general aspects of processes or apparatus for joining preformed parts B29C66/00; using porous material formed by internal pressure generated therein for joining preformed parts B29C44/1228, B29C44/326
• CPC Class Codes: B29C 65/0672 Spin welding
• CPC Class Codes: B29C 65/08 using ultrasonic vibrations non-plastics element to plastics elements B29C65/645
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/5057 positioned between the surfaces to be joined B29C65/5035 takes precedence
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/1226 comprising at least one bevelled joint-segment
• CPC Class Codes: B29C 66/1312 Single flange to flange joints, the parts to be joined being rigid the parts to be joined being flexible B29C66/133
• CPC Class Codes: B29C 66/522 Joining tubular articles B29C66/53241 takes precedence
• CPC Class Codes: B29C 66/5344 said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends B29C66/5346 takes precedence
• CPC Class Codes: B29C 66/612 Making circumferential joints
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/73 characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29K 2007/00 Use of natural rubber as moulding material
• CPC Class Codes: B29K 2009/00 Use of rubber derived from conjugated dienes, as moulding material
• CPC Class Codes: B29K 2023/00 Use of polyalkenes or derivatives thereof as moulding material
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/12 : PP, i.e. polypropylene
• CPC Class Codes: B29K 2023/16 : EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
• CPC Class Codes: B29K 2025/00 : Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
• CPC Class Codes: B29K 2027/06 : PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2031/04 : Polymers of vinyl acetate, e.g. PVAc, i.e. polyvinyl acetate
• CPC Class Codes: B29K 2055/02 : ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2067/006 : PBT, i.e. polybutylene terephthalate
• CPC Class Codes: B29K 2071/02 : Polyalkylene oxides, e.g. PEO, i.e. polyethylene oxide, or derivatives thereof
• CPC Class Codes: B29K 2096/04 : Block polymers
• CPC Class Codes: B29K 2105/0085 : Copolymers
• CPC Class Codes: B29K 2995/0046 : Elastic
• CPC Class Codes: B29L 2031/7148 : Blood bags, medical bags
• CPC Class Codes: C08L 23/02 : not modified by chemical after-treatment
• CPC Class Codes: C08L 2666/24 : Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/00 : Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 67/02 : Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: Y10S 285/919 : Resinous
• CPC Class Codes: Y10S 383/904 : Filling tube

Abstract

A plastic composition which may be molded into a connector which is capable of simultaneously sealing to both polyvinyl chloride plastics and polyolefin plastics. The plastic composition comprises from 50 to 75 percent by weight of an essentially polyolefin material which is sealingly compatible with the polyolefin plastic to which the composition is intended to be sealed, and from 25 to 50 percent by weight of a flexible block copolymer of covalently bonded polybutylene terephthalate units and poly(1,4-butylene) oxide units.

Claims

1. In a flexible, collapsible container comprising a container body which is made of a material selected from the group consisting of essentially polyolefin materials and polyvinyl chloride plastics, said container defining connected tubing which is made of a material selected from the group consisting of essentially polyolefin materials and polyvinyl chloride plastics, the tube material being of the other category of material from the material of the container body, and an apertured connector sealed to said container body and to said tubing to permit a fluid flow path to pass between the bore of said tubing and said container in aseptic manner, said connector being made of a plastic composition which comprises (a) from 50 to 75 percent by weight of an essentially polyolefin material which is sealingly compatible with the polyolefin material from which one of the container and tube is made, and (b) from 25 to 50 percent by weight of a flexible block copolymer of covalently bonded polyethylene terephthalate units and poly(1,4-butylene)oxide units.

2. The flexible, collapsible container of claim 1 in which said block copolymer of ingredient (b) is a thermoplastic material having a melt flow rate of no less than 15 grams per 10 minutes at 220°

C. in accordance with ASTM D1238.

3. The flexible, collapsible container of claim 1 in which 60 to 70 percent of the essentially polyolefin material is present, and 30 to 40 percent of the block copolymer of ingredient (b) is present.

4. The flexible, collapsible container of claim 1 in which said block copolymer of ingredient (b) contains from 50 to 70 percent by weight of said poly(1,4-butylene oxide) blocks.

5. In a flexible, collapsible container comprising a container body which is made of a material selected from the group consisting of essentially polyolefin materials and polyvinyl chloride plastics, said container defining connected tubing which is made of a material selected from the group consisting of essentially polyolefin materials and polyvinyl chloride plastics, the tube material being of the other category of material from the material of the container body, and an apertured connector sealed to said container body and to said tubing to permit a fluid flow path to pass between the bore of said tubing and said container in aseptic manner, said connector being made of a plastic composition which comprises (a) from 50 to 75 percent by weight of an essentially polyolefin material which is sealingly compatible with the polyolefin material from which one of the container and tube is made, said essentially polyolefin material including from 40 to 85 percent by weight of a block copolymer having thermoplastic rubber characteristics consisting essentially of a central, rubbery olefin polymer block and terminal blocks of polystyrene, and (b) from 25 to 50 percent by weight of a flexible block copolymer of covalently bonded polyethylene-terephthalate units and poly(1,4-butylene)oxide units.

6. The flexible, collapsible container of claim 5 in which the rubbery olefin polymer of ingredient (a) is poly(ethylene-propylene).

7. The flexible, collapsible container of claim 5 in which said essentially polyolefin material of said connector also contains a polyolefin consisting essentially of propylene units.

8. The flexible, collapsible container of claim 5 in which said essentially polyolefin material of said connector also contains poly(ethylene-vinyl acetate) containing no more than 35 percent by weight of vinyl acetate units.

9. The flexible, collapsible container of claim 5 in which said block copolymer of ingredient (b) is a thermoplastic material having melt flow rate of no less than 15 grams per 10 minutes at 220°

C. in accordance with ASTM D1238.

10. The flexible, collapsible container of claim 9 in which 60 to 70 percent of the essentially polyolefin material is present, and 30 to 40 percent of the block copolymer of ingredient (b) is present.

11. The flexible, collapsible container of claim 10 in which said block copolymer of ingredient (b) contains from 50 to 70 percent by weight of said poly(1,4-butylene oxide) blocks.

12. The flexible, collapsible container of claim 11 in which the rubbery olefin polymr of ingredient (a) is poly(ethylene-propylene).

13. The flexible, collapsible container of claim 5 in which the central block comprises 50 to 85 percent by weight of the block copolymer having thermoplastic, rubbery characteristics.

14. The flexible, collapsible container of claim 13 in which said container body is made of an essentially polyolefin material which contains a block copolymer having thermoplastic rubbery characteristics having a central block of poly(ethylene-butylene) and terminal blocks of polystyrene.