Claims
- 1. A flexible plastic formulation for fabricating a platelet container and which is suitable for contact with platelets without contaminating said platelets, the formulation further being capable of being extruded, blow-molded, and radiation sterilized, which comprises:a) from about 78 to about 82 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 14 to about 18 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 4 to about 6 percent by weight of an ultra-low density polyethylene material, d) the formulation being free of stabilizers and plasticizers.
- 2. A flexible, collapsible container for platelets capable of being radiation-sterilized made from a plastic formulation suitable for contact with platelets without contaminating said platelets, the formulation comprising:a) from about 78 to about 82 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the ethylene-vinyl acetate copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 14 to about 18 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 4 to about 6 percent by weight of an ultra-low density polyethylene material, d) the formulation being free of stabilizers and plasticizers.
- 3. A method of housing platelets, the method comprising the step of enclosing the platelets in a container made of a flexible plastic formulation that is in contact with the blood and which is capable of being extruded, blow molded, and radiation sterilized which consists of:a) from about 78 to about 82 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the ethylene-vinyl acetate copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 14 to about 18 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 4 to about 6 percent by weight of an ultra-low density polyethylene material; d) the formulation being free of stabilizers and plasticizers.
- 4. A flexible, collapsible container containing platelets, the container being capable of being radiation-sterilized and being made from a plastic formulation that is in contact with the blood and which consists of:a) from about 78 to about 82 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the ethylene-vinyl acetate copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 14 to about 18 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 4 to about 6 percent by weight of an ultra-low density polyethylene material; d) the formulation being free of stabilizers and plasticizers.
- 5. A multi-layered laminate film for use in storing platelets including at least one layer made from a plastic formulation which comprises:a) from about 78 to about 82 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the ethylene-vinyl acetate copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 14 to about 18 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 4 to about 6 percent by weight of an ultra-low density polyethylene material; d) the formulation being free of stabilizers and plasticizers.
- 6. A container for platelets constructed from a multi-layer plastic laminate which includes at least one layer made from a plastic formulation consisting of:a) from about 60 to about 94 percent by weight of a copolymer consisting essentially of ethylene and vinyl acetate units wherein the ethylene-vinyl acetate copolymer includes from about 25 to about 30 percent by weight vinyl acetate units; b) from about 5 to about 25 percent by weight of a block copolymer, the block copolymer consisting essentially of a central block copolymer molecule including ethylene and butylene units in about a 1:1 ratio, and terminal blocks of polystyrene wherein the block copolymer molecule includes from about 50 to about 85 percent by weight of the central block copolymer molecule; and c) from about 1 to about 8 percent by weight of an ultra-low density polyethylene material.
Parent Case Info
This application is a continuation of U.S. Ser. No. 08/824,585, filed Mar. 26, 1997, abandoned, which is a continuation of U.S. Ser. No. 08/343,303, filed Nov. 22, 1994, abandoned.
US Referenced Citations (8)
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Jan 1978 |
DE |
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Entry |
Article entitled: “Ethylene/vinyl acetate copolymer containers,” Baxter Travenol Laboratories, Inc., May 30, 1978, addition to 1527685 Headings C3V and C3W. |
Continuations (2)
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Number |
Date |
Country |
Parent |
08/824585 |
Mar 1997 |
US |
Child |
09/991826 |
|
US |
Parent |
08/343303 |
Nov 1994 |
US |
Child |
08/824585 |
|
US |