Bonded object, and method for manufacturing bonded object

Patent metadata

Field	Value
Publication number	US-12565601-B2
Application number	US-202218283265-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Mar 31, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

An embodiment of the present invention relates to a bonded object or a method for manufacturing a bonded object, the bonded object having bases bonded therein while placing an adhesive layer in between, the adhesive layer being obtained from a fluororubber composition that contains at least one fluororubber selected from fluoroelastomer (FKM) and perfluoroelastomer (FFKM), and has a Mooney viscosity (ML 1+10) at 121° C., measured in accordance with ASTM D1646, of 80 to 115.

First claim

The invention claimed is:

1 . A method for manufacturing a bonded object, the method comprising:
preparing a structure having bases and an adhesive arranged between the bases; and joining the structure in the presence of liquid or gaseous carbon dioxide, the adhesive being obtained from a fluororubber composition having a Mooney viscosity ML 1+10 at 121° C., measured in accordance with ASTM D1646, of 80 to 115.

2 . The method for manufacturing the bonded object according to claim 1 , further comprising:
placing the structure in a pressure vessel; and introducing carbon dioxide into the pressure vessel.

3 . The method for manufacturing the bonded object according to claim 2 ,
wherein the step of introducing carbon dioxide into the pressure vessel is introducing liquid or gaseous carbon dioxide so as to adjust a pressure in the pressure vessel at 3 MPa or higher.

4 . The method for manufacturing the bonded object according to claim 1 , wherein the fluororubber composition comprises at least one fluororubber selected from fluoroelastomer and perfluoroelastomer.

5 . The method for manufacturing the bonded object according to claim 1 ,
wherein the fluororubber composition comprises: a fluororubber (A1) having a Mooney viscosity ML 1+10 at 121° C., measured in accordance with ASTM D1646, of 40 to 150; and a fluororubber (A2) having a Mooney viscosity ML 1+10 at 121° C., measured in accordance with ASTM D1646, of 10 or larger and smaller than 40.

6 . The method for manufacturing the bonded object according to claim 1 , wherein the fluororubber composition comprises a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene-based polymer.

7 . The method for manufacturing the bonded object according to claim 1 , wherein the adhesive is the fluororubber composition in a liquid or paste form; a dried product of the fluororubber composition in a liquid or paste form; or a fiber, nonwoven fabric, or film obtained from the fluororubber composition.

8 . The method for manufacturing the bonded object according to claim 1 ,
wherein the adhesive is a fluororubber fiber or fluororubber nonwoven fabric obtained by a method comprising: spinning the fluororubber composition; and crosslinking a fiber obtained in the step A.

9 . The method for manufacturing the bonded object according to claim 1 , wherein at least one of the bases is a nonwoven fabric, a woven fabric, a porous membrane, or a fiber.

10 . The method for manufacturing the bonded object according to claim 1 ,
wherein the base is a base selected from a nonwoven fabric, a woven fabric, and a porous membrane, and the adhesive is a fiber or nonwoven fabric obtained from the fluororubber composition.

Assignees

• Valqua Ltd
• Aist

Inventors

• Watanabe Naoki
• Setoguchi Yoshihiro
• AIZAWA Takafumi

Classifications

• C09J2427/008

  in the pretreated surface to be joined · CPC title

• C09J2400/266

  in the pretreated surface to be joined · CPC title

• C09J127/20

  Homopolymers or copolymers of hexafluoropropene · CPC title

• C09J127/18

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C09J127/14

  Homopolymers or copolymers of vinyl fluoride · CPC title