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Bromobutyl rubber-based self-resealing septum and closure assembly

a technology of bromobutyl rubber and septum, applied in the field of septum, can solve problems such as less than ideal

Inactive Publication Date: 2013-09-19
FISHER SCI CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a septum for a self-resealing closure assembly for containers, which can store non-aqueous liquids such as organic solvents, liquid organic compounds, water-reactive or oxygen-reactive compounds, or combinations thereof. The septum is designed to provide re-sealing properties to the containers after being punctured by a hollow member to preserve the separation of the non-aqueous liquid from the ambient environment outside of the container. The assembly includes a retaining mechanism and a cap of inelastic material. The technical effect is that it provides a reliable and efficient mechanism for resealing containers after puncture, ensuring the safety and integrity of the stored non-aqueous liquids.

Problems solved by technology

Often times the match is less than ideal, resulting in a premature breakdown of the contiguous closed hole, which permits contact between the vessel's contents and the ambient air.

Method used

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  • Bromobutyl rubber-based self-resealing septum and closure assembly
  • Bromobutyl rubber-based self-resealing septum and closure assembly
  • Bromobutyl rubber-based self-resealing septum and closure assembly

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examples

[0050]Comparative testing: Various septa, as detailed in Table 1 below, were tested for comparison to a septum comprising a resilient material derived from bromobutyl rubber. Each septum is coated on a single side with a fluoropolymer. The septum is placed in a retainer mechanism, which is subsequently affixed to a bottle containing tetrahydrofuran (THF). The septum is pierced with an 18 gauge needle and bottle assembly is inverted several times to simulate normal laboratory usage. The physical integrity of the pierced septa is visually evaluated.

TABLE 1Comparative testing of septa with tetrahydrofuran (THF).DiamDepthInversion testMakeSupplier(mm)(mm)Descriptionwith THFCommentBlack vitonGW43.13Single side PTFEok1face 70 ± 5° slave offRed VitonGW43.13Single side PTFEtacky surface1face 65 ± 5° slave offFKMGW43.0830.05 mm PFAtacky surface2FKMGW43.1530.25 mm PFAtacky surface2BromobutylGW42.830.25 mm PFAtacky surface2BromobutylGW42.930.05 mm PFAtacky surface2SiliconGW43.230.25 mm PFAok2S...

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Abstract

A self-resealing septum useful in a closure assembly for a container for storing non-aqueous liquids is provided. The septum having a laminate structure including a first layer of a resilient material derived from bromobutyl rubber and a second layer of a non-elastic polymer. The self-resealing closure assembly includes the septum and a retaining mechanism that is useful for a container assembly that contains a non-aqueous liquid comprising an organic solvent, a liquid organic compound, a water-reactive or oxygen-reactive compound, or a combination thereof.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to septa, and more particularly to a penetrable and self-resealing septum and closure assembly, which can be used for storing non-aqueous liquids in the chemical, medical, and biochemical industries.BACKGROUND OF THE INVENTION[0002]Septa are piercable, mechanical barriers typically positioned between a vessel and its contents (usually a liquid) and the vessel's ambient environment. In such a configuration, a septum prevents contamination of the vessel contents and / or contamination of the environment by the vessel contents. The ability of the septum to maintain this separation is important for non-aqueous solvents and chemical reagents, especially hygroscopic or reactive reagents that require isolation from ambient laboratory conditions. For example, non-aqueous solvents such as dimethylsulfoxide and acetone can readily absorb atmospheric moisture upon exposure, and reactive reagents such as organolithium reagents can readi...

Claims

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Application Information

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IPC IPC(8): B65D51/00B65B7/28
CPCB32B25/08B32B25/18B32B27/322B32B2250/02B32B2250/03B32B2250/24B01L2300/044B32B2435/02B32B2439/40B32B2439/60B01L3/50825B01L2200/141B32B2435/00B65D41/0471B65D41/3447B65D51/002
Inventor GLASER, JOHN T.JASKO, MARK
Owner FISHER SCI CO LLC
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