Seal material for analyzer, and flow cell, detector, and analyzer using the same

Patent metadata

Field	Value
Publication number	US-12098998-B2
Application number	US-201917280414-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Sep 28, 2018
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

Provided is a seal material having high rigidity without deformation or breakage, excellent corrosion resistance to fluid, and low solubility when used under high sealing force, and to provide a flow cell, a detector, and an analyzer in which there is no fluid leakage, contamination of the seal material components is prevented, and the replacement frequency is low. Provided are a seal material for an analyzer, including a resin and at least one layer of fiber sheet embedded in the resin, wherein the at least one layer of fiber sheet is embedded between and in substantially parallel to two seal surfaces: a first seal surface, which is one resin surface of the seal material; and a second seal surface, which is the other resin surface substantially parallel to the former one, and a flow cell, a detector, and an analyzer using the seal material.

First claim

The invention claimed is:

1. A seal material for an analyzer, comprising
a resin and at least one layer of fiber sheet embedded in the resin,
wherein the at least one layer of fiber sheet is embedded between and in substantially parallel to two seal surfaces: a first seal surface, which is one resin surface of the seal material; and a second seal surface, which is the other resin surface substantially parallel to the first seal surface,
wherein a thickness of the seal material is from 0.05 mm to 2 mm,
wherein the fiber sheet consists only of fiber,
wherein a thickness of the fiber sheet is from 20 μm to 500 μm, and
wherein a ratio of a total surface area of fibers constituting the fiber sheet to a volume of the resin is from 50 cm 2 /cm 3 to 500 cm 2 /cm 3 .

2. The seal material for an analyzer according to claim 1 , wherein the fiber sheet is a non-woven fabric.

3. The seal material for an analyzer according to claim 1 , wherein the resin has a glass transition temperature of 40° C. or higher.

4. The seal material for an analyzer according to claim 1 , wherein the resin comprises a thermoplastic resin.

5. The seal material for an analyzer according to claim 4 , wherein the thermoplastic resin comprises a fluororesin.

6. The seal material for an analyzer according to claim 5 , wherein the fluororesin comprises tetrafluoroethylene or a perfluoroalkyl vinyl ether copolymer.

7. The seal material for an analyzer according to claim 1 , wherein the fiber sheet substantially parallel to the seal surfaces comprises a metal fiber.

8. A flow cell comprising at least one of the seal material for an analyzer according to claim 1 .

9. A detector comprising the flow cell of claim 8 .

10. An analyzer comprising at least one of the seal material for an analyzer according to claim 1 .

11. The analyzer according to claim 10 , wherein the analyzer is a liquid chromatograph or a supercritical fluid chromatograph.

12. The seal material for an analyzer according to claim 1 , wherein a ratio of a length Lf of the fiber sheet to a length Ls of the seal material (Lf/Ls) is from 0.1 to 0.9.

13. The seal material for an analyzer according to claim 1 , wherein the fiber sheet substantially parallel to the seal surfaces comprises at least one kind of an inorganic fiber or an organic fiber.

14. The seal material for an analyzer according to claim 7 , wherein the metal fiber comprises stainless steel fiber, nickel fiber, copper fiber, aluminum fiber, silver fiber, gold fiber, or titanium fiber.

15. The seal material for an analyzer according to claim 7 , wherein the metal fiber is sintered.

Assignees

• Tomoegawa Co Ltd
• Shimadzu Corp

Inventors

• Tsuchida Minoru
• Oyaizu Akiyasu
• Nagai Yusuke
• Okumura Katsuya

Classifications

• G01N2030/027

  Liquid chromatography · CPC title

• G01N30/74

  Optical detectors {(measurement of intensity, velocity, spectral content, polarisation, or phase of infrared, visible or ultraviolet light G01J)} · CPC title

• G01N21/0317

  High pressure cuvettes; (G01N21/0332 - G01N21/15 take precedence) · CPC title

• F16J15/0806

  characterised by material or surface treatment · CPC title

• B29K2105/0854

  in the form of a non-woven mat · CPC title