Multilayered structure and colostomy bag made therefrom

• US 5,582,820 A
• Filed: 01/05/1994
• Issued: 12/10/1996
• Est. Priority Date: 03/18/1988
• Status: Expired due to Fees

• Current Assignee: Kuraray Company Limited
• Original Assignee: Kuraray Company Limited
• Inventors: Yamamoto, Yoshio, Kawasaki, Akihiko, Moritani, Tohei
• Primary Examiner(s): Webman, Edward J.
• Application Number:
  US08/177,727
• Time in Patent Office: 1,070 Days
• Field of Search: 424/76.5, 424/76.6, 604/333, 428/34.3, 428/36.6, 428/36.7
• US Class Current: 424/76.6
• CPC Class Codes: A61F 5/441 having venting or deodorant means, e.g. filters ; having antiseptic means, e.g. bacterial barriers
• CPC Class Codes: A61L 28/0011 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 9/01 Deodorant compositions compositions released by contact with a liquid A61L9/05
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 2329/04 Polyvinylalcohol
• CPC Class Codes: B32B 2535/00 Medical equipment, e.g. bandage, prostheses or catheter
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: C08L 23/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: Y10T 428/1307 Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
• 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 428/1383 Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]

Abstract

A multilayered structure comprising at least 2 layers of a gas barrier resin layer and a protective layer, at least 1 layer thereof containing a deodorant, and a colostomy bag having excellent odor barrier properties (skatole and ammonia barrier properties) made of the film of the multilayered structure.

Claims

1. A multilayered structure consisting essentially of at least one gas barrier layer of an ethylene-vinyl alcohol copolymer having an ethylene content of 20 to 50 mol % and an oxygen transmission rate measured at 20°

C., 65% RH of not more than 10 cc. 20μ

/m² ·

day·

atm.;

at least one protective layer to protect said gas barrier layer, and from 0.1% to 50% by weight of a deodorant incorporated in either or both of said layers, the weight % of said deodorant being based upon the weight of the layer in which said deodorant is incorporated, said multilayered structure providing an effective barrier against skatole and ammonia odors.

2. A multilayered structure as defined in claim 1 additionally containing an adhesive layer between said layers.

3. A multilayered structure as defined in claim 2 wherein said deodorant is incorporated in one or more of said gas barrier, protective and/or adhesive layers.

4. A multilayered structure as defined in claim 1 wherein the gas barrier layer comprises an ethylene vinyl alcohol copolymer blended with an ethylene copolymer resin containing 2 to 25 mol % of a member selected from the group consisting of vinyl acetate, acrylic acid esters, methacrylic acid esters, and mixtures thereof.

5. A multilayered structure as defined in claim 4, wherein said gas barrier layer comprises 60 to 95 parts by weight of said ethylene vinyl alcohol copolymer and 40 to 5 parts by weight of said ethylene copolymer.

6. A multilayered structure according to claim 1 wherein said deodorant is contained in said protective layer.

7. A multilayered structure according to claim 1 wherein said deodorant is a composition comprising a member selected from the group consisting of a zinc compound, an aluminum compound, a silicon compound, an iron (II) compound, and mixtures thereof.

8. A multilayered structure according to claim 1 wherein said protective layer is a thermoplastic resin layer.

9. A multilayered structure according to claim 8 wherein said thermoplastic resin layer exhibits a Young'"'"'s modulus (20°

C.) of not more than 2.5 kg/mm².