Medical rubber closure and method for manufacturing the same
US-2016075485-A1 · Mar 17, 2016 · US
Medical rubber parts
US9724476B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9724476-B2 |
| Application number | US-201414469656-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2014 |
| Priority date | Sep 25, 2013 |
| Publication date | Aug 8, 2017 |
| Grant date | Aug 8, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention provides, medical rubber parts that do not physically and chemically affect the quality of preparations. The present invention relates to a medical rubber part obtained by press-molding an unvulcanized rubber mainly containing a rubber for forming a liquid-contacting portion and an unvulcanized rubber mainly containing a butyl-based rubber for forming a non-liquid-contacting portion, wherein a color difference dE between the liquid-contacting portion and the non-liquid-contacting portion is 6.0 or more in NBS units.
First claim
Opening claim text (preview).
The invention claimed is: 1. A medical rubber part, obtained by: stacking an unvulcanized rubber sheet mainly containing a rubber for forming a liquid-contacting portion and an unvulcanized rubber sheet mainly containing a butyl-based rubber for forming a non-liquid-contacting portion, and press-molding the stacked rubber sheets to form a molded sheet, thereby obtaining said medical rubber part, wherein a color difference dE between the liquid-contacting portion and the non-liquid-contacting portion is 6.0 or more in NBS units, and wherein a density difference between the liquid-contacting portion and the non-liquid-contacting portion is 0.02 or less. 2. The medical rubber part according to claim 1 , wherein the color difference dE is 12.0 or more in NBS units. 3. The medical rubber part according to claim 1 , wherein in the unvulcanized rubber for forming a liquid-contacting portion or a non-liquid-contacting portion, an amount of color pigments other than titanium oxide is 0 to 3.0 parts by mass and an amount of titanium oxide is 0 to 5.0 parts by mass, each per 100 parts by mass of a rubber component of the unvulcanized rubber. 4. A vial rubber stopper, comprising the medical rubber part according to claim 1 . 5. A pre-filled syringe gasket, comprising the medical rubber part according to claim 1 . 6. A nozzle cap, comprising the medical rubber part according to claim 1 .
Assignees
Inventors
Classifications
Making multilayered articles · CPC title
Injection needles, syringes · CPC title
Methods of manufacture, assembly or production · CPC title
Layered products · CPC title
- A61M5/31513Primary
Piston constructions to improve sealing or sliding · CPC title
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Frequently asked questions
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- What does patent US9724476B2 cover?
- The present invention provides, medical rubber parts that do not physically and chemically affect the quality of preparations. The present invention relates to a medical rubber part obtained by press-molding an unvulcanized rubber mainly containing a rubber for forming a liquid-contacting portion and an unvulcanized rubber mainly containing a butyl-based rubber for forming a non-liquid-contacti…
- Who is the assignee on this patent?
- Sumitomo Rubber Ind
- What technology area does this patent fall under?
- Primary CPC classification A61M5/31513. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Aug 08 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).