US6645635B2
Expired / Lapsed
US
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Laminated rubber stopper for a medicament vial
Assignee: Daikyo Seiko Ltd
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Filing: 2002-01-17
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Granted: 2003-11-11
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Expires: 2022-01-17
Abstract
Abstract The present invention aims at providing an improved thermoplastic film-laminated rubber stopper for a medicament vial, having more sufficient and excellent sealing property as well as barrier effect of permeation, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film, in particular, tetrafluoroethylene resin film, having a flexural modulus in a range of at most 600 MPa and a coefficient of kinetic friction in a range of at most 0.4.
Inventors
- 👤 Tomoyasu Muraki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:54
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/002; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/23; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A laminated rubber stopper for a medicament vial, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film having a flexural modulus of at most 600 MPa, and a coefficient of kinetic friction of at most 0.4, wherein the thermoplastic film is a tetrafluoroethylene resin film or a modified tetrafluoroethylene resin film.
Claim 2
Dependent Claim
70 words
A laminated rubber stopper for a medicament vial, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film having a flexural modulus of at most 600 MPa, and a coefficient of kinetic friction of at most 0.4, wherein the thermoplastic film is a tetrafluoroethylene resin film or a modified tetrafluoroethylene resin film.
Claim 3
Dependent Claim
26 words
The laminated rubber stopper for a medicament vial, as claimed in claim 1 , wherein the thermoplastic film has a thickness of 1 to 300 μm.
Claim 4
Dependent Claim
27 words
The laminated rubber stopper for a medicament vial, as claimed in claim 2 , wherein the thermoplastic film is prepared by a casting method or skiving method.
Claim 5
Dependent Claim
27 words
The laminated rubber stopper for a medicament vial, as claimed in claim 1 , wherein the thermoplastic film is prepared by a casting method or skiving method.
Claim 6
Dependent Claim
61 words
The laminated rubber stopper for a medicament vial, as claimed in claim 1 , wherein the modified tetrafluoroethylene resin film consists of a fluoro resin having improved creep resistance and further improved flexural property, weldability, drawing and stretching property, which is obtained by sintering fine grains having a mean grain diameter of several ten microns, to give a dense worked film.
Claim 7
Dependent Claim
53 words
The laminated rubber stopper for a medicament vial, as claimed in claim 1 , wherein the tetrafluoroethylene resin film is prepared by a casting method or skiving method using, as a raw material, a suspension containing tetrafluoroethylene resin powder having a maximum grain diameter of 0.01 to 1.0 μm, dispersing agent and solvent.
Claim 8
Dependent Claim
78 words
A laminated rubber stopper for a medicament vial, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film having a flexural modulus of at most 600 MPa, a coefficient of kinetic friction of at most 0.4, and a thickness of 0.001 mm to 0.3 mm, wherein the thermoplastic film is a tetrafluoroethylene resin film or a modified tetrafluoroethylene resin film.
Claim 9
Dependent Claim
78 words
A laminated rubber stopper for a medicament vial, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film having a flexural modulus of at most 600 MPa, a coefficient of kinetic friction of at most 0.4, and a thickness of 0.001 mm to 0.3 mm, wherein the thermoplastic film is a tetrafluoroethylene resin film or a modified tetrafluoroethylene resin film.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2006-11-10 | 2007-05-12 | 2007-11-11 | $2000.00 | Window Closed / Lapsed |
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