EP-4737116-A1 - LAMINATE AND PRODUCTION METHOD THEREFOR

Abstract

A laminate structure includes: a first member formed from a silicone rubber; a second member formed from a polycarbonate; and a bonding layer formed from a silane coupling agent containing a glycidyl group, the bonding layer bonding the first member to the second member.

Inventors

• YOSHITOMI, Takumi
• FUTASHIMA, RYO
• YOSHIDA, Shizuki

Assignees

• NOK Corporation

Dates

Publication Date

20260506

Application Date

20240620

Claims (5)

1. A laminate structure comprising: a first member formed from a silicone rubber; a second member formed from a polycarbonate; and a bonding layer formed from a silane coupling agent containing a glycidyl group, the bonding layer bonding the first member to the second member.
2. A method for manufacturing a laminate structure, the method comprising: an application step of applying a bonding material composed of a silane coupling agent containing a glycidyl group to: a first surface of a first member formed from a silicone rubber; and a second surface of a second member formed from a polycarbonate; and a bonding step of bonding the first surface of the first member to the second surface of the second member using the bonding material.
3. The method for manufacturing the laminate structure according to claim 2, the method further comprising a preparation step of preparing the silane coupling agent containing the glycidyl group before performing the application step.
4. The method for manufacturing the laminate structure according to claim 3, wherein the preparation step includes preparing the bonding material by mixing the silane coupling agent containing the glycidyl group with a solvent at a concentration within a range from 1 wt % to 10 wt %.
5. The method for manufacturing the laminate structure according to claim 3 or claim 4, the method further comprising a surface treatment step performed between the preparation step and the application step, wherein the first surface and the second surface are activated by being irradiated with light.

Description

TECHNICAL FIELD This invention relates to a technique for bonding members together. BACKGROUND ART A technique is known for bonding together members made of different materials using a silane coupling agent. For example, Patent Document 1 discloses bonding a sheet formed from a silicone rubber to a sheet formed from a resin material or a metal material using a single type of silane coupling agent. Related Art Document Patent Document Patent Document 1: Japanese Patent Application Laid-Open Publication No. 2014-62224. SUMMARY OF THE INVENTION Problems to be solved by the invention In bonding a sheet formed from a silicone rubber to a sheet formed from a resin material, it is important to improve a durability of the bond by use of a simplified process. In view of the above-described circumstances, an aspect of this disclosure is to improve a durability of a bond between a first member and a second member while using a simplified process to manufacture a laminate structure. Means for solving the problems A laminate structure, according to an aspect of this invention, includes: a first member formed from a silicone rubber; a second member formed from a polycarbonate; and a bonding layer formed from a silane coupling agent containing a glycidyl group, the bonding layer bonding the first member to the second member. A method for manufacturing a laminate structure, according to an aspect of this invention, includes: an application step of applying a bonding material composed of a silane coupling agent containing a glycidyl group to: a first surface of a first member formed from a silicone rubber; and a second surface of a second member formed from a polycarbonate; and a bonding step of bonding the first surface of the first member to the second surface of the second member using the bonding material. Effect of the Invention According to this invention, durability of the bond between the first member and the second member is improved while a process for manufacturing a laminate structure is simplified. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a laminate structure according to an embodiment.FIG. 2 is a diagram showing a process of manufacturing the laminate structure.FIG. 3 is a table showing results of evaluation of peeling between a first member and a second member. MODES FOR CARRYING OUT THE INVENTION A: Laminate structure FIG. 1 is a cross-sectional view of a laminate structure 100 according to an aspect of this disclosure. In this embodiment, the laminate structure 100 is a well plate for use in culturing a variety of cells (specifically, spheroids), and includes a first member 10, a second member 20, and a bonding layer 30. The first member 10 is a thin plate-shaped molded structure formed from a silicone rubber. The first member 10 is primarily composed of a silicone rubber. An example of the silicone rubber is polydimethylsiloxane (PDMS). The first member 10 has a first surface 11. Fine recesses (not shown) are provided in the first surface 11. In one example, each of the fine recesses is generally hemispherical in shape and has a diameter of about 1mm. The second member 20 is a thin plate-shaped molded structure formed from a polycarbonate (PC). The first member 10 is primarily composed of a polycarbonate. Thus, the first member 10 and the second member 20 are formed from different types of resin materials. The external dimensions of the first member 10 are substantially the same as those of the second member 20. The second member 20 has a second surface 21. The first surface 11 of the first member 10 faces the second surface 21 of the second member 20. Circular holes (openings) 22 arranged in a matrix pattern are provided in the second member 20. A diameter each of the circular holes 22 is sufficiently larger than that each of the recesses provided in the first surface 11. Cells for culture are housed in a space within respective ones of each of the circular holes 22. The first surface 11 of the first member 10 serves as the bottom surface. The bonding layer 30 is interposed between the first member 10 and the second member 20. The bonding layer 30 is formed from a bonding material and bonds the first surface 11 to the second surface 21. The bonding material used to form the bonding layer 30 is a silane coupling agent containing a glycidyl group as a functional group. For example, 3-Glycidoxypropyltrimethoxysilane can be used as the bonding material for the bonding layer 30. Alternatively, other silane coupling agents, such as 3-Glycidyloxypropylmethyldiethoxysilane or 3-Glycidoxypropylmethyldimethoxysilane, can be used as the bonding material 30. In the above configuration, the silicone rubber (particularly polydimethylsiloxane) used as the material for the first member 10 is highly permeable to oxygen. Since oxygen readily permeates through the first member 10, cells cultured within the laminate structure 100 are able to respire similarly to a living organism. On the other ha