JP-7856394-B2 - Composite, method for manufacturing the same, and display device.

Inventors

• 松村 勝弘
• 武田 整

Assignees

• ＭＣＣアドバンスドモールディングス株式会社

Dates

Publication Date

20260511

Application Date

20210909

Claims (6)

1. A composite of glass and resin components, wherein a resin molded body, which serves as a bonding portion for fixing to the housing, is placed only on one side of the glass substrate, The resin molded body has a main body that is bonded to the part of the housing to be bonded, and this main body is bonded to the glass substrate via a base portion made of a thermoplastic elastomer layer. The area of the base portion overlapping one side of the glass substrate is larger than the area of the main body portion overlapping the base portion. The composite is characterized in that the glass substrate has a partially laminated printed layer and adhesive layer on its surface, and the resin molded body is disposed on the surface of the adhesive layer.
2. The composite according to claim 1, wherein the thermoplastic elastomer layer is a polyester-based thermoplastic elastomer.
3. The composite according to claim 1 or 2, wherein the resin molded article is mainly composed of at least one of ABS resin, polycarbonate resin, or polybutylene terephthalate resin.
4. A display device using the composite structure described in any one of claims 1 to 3 as a display panel.
5. In a method for producing the composite described in claim 1, A step of injection molding the first resin molded body, which is the main body of the resin molded body, using a primary side molding die, The process involves transferring the first resin molded body to the secondary molding region and inserting a glass substrate into the region such that the colored portion, which has a partially laminated printed layer and adhesive layer on its surface, faces the first resin molded body . A step of closing the secondary molding die and injection molding a second resin molded body, which is the base portion of the resin molded body, between the glass substrate and the first resin molded body such that the area of the joint portion with the colored portion of the glass substrate is larger than the area of the joint portion with the first resin molded body, The process involves opening the secondary molding die and removing the composite of the glass substrate and the resin member, A method for producing a composite, characterized by having the above characteristics.
6. The method for producing the composite according to claim 5, wherein the primary molding resin is a resin material mainly composed of at least one of ABS resin, polycarbonate resin, or polybutylene terephthalate resin, and the secondary molding resin is a polyester thermoplastic elastomer.

Description

This invention relates to a composite material of glass and resin components used in display panels for devices that display information and images, such as car navigation systems. Display panels for devices that display various information and images are made of either synthetic resin or glass. However, in high-end devices, glass panels are often used because their glossy texture creates a sense of luxury. The display panel is attached to the front frame of the housing that contains the electronic device. In the case of glass panels, the back side is often attached to the front frame using adhesive tape or similar. The method of attaching the display panel to the casing using adhesive tape was cumbersome, requiring the preparation of the necessary adhesive tape and adjustments to accurately position it. Furthermore, if the display panel was damaged or broken and needed replacing, replacement was difficult if it was fixed with adhesive tape. Therefore, instead of the aforementioned adhesive fixing method, an alternative method has been considered in which connecting parts, such as ribs made of resin material, are integrally attached to the back side of the glass display panel by outsert molding, and these connecting parts are then connected to a connecting part provided on the front frame of the housing to attach the display panel to the housing (see, for example, Patent Document 1). Japanese Patent Publication No. 2013-159114 This figure shows the front and back surfaces of a display panel, which is one embodiment of the composite of the present invention, divided into sections.Figure 1 is an enlarged cross-sectional perspective view of the portion of the display panel where the resin molded body is provided.Figures (A) and (B) are diagrams illustrating the molding process of the display panel in Figure 1, and are schematic cross-sectional end views of the primary side molding die. Figure (B) shows the cross-sectional end view at the position where the hole portion of the first resin molded body is provided.(A) and (B) are diagrams illustrating the molding process of the display panel in Figure 1, and are schematic cross-section views of the secondary molding die.This is an enlarged section view of the display panel removed from the secondary molding die.This is an enlarged section view of a gated display panel. The composite of the present invention will be described below based on examples. The embodiments shown below are illustrative examples for embodying the technical concept of the present invention, and the present invention is not limited to the following forms. Figure 1 shows an example of how the composite device of the present invention is applied to the display panel of a car navigation system. The illustrated display panel 1 is constructed by integrally arranging multiple resin molded bodies 3, which serve as bonding parts, on the back side of a horizontally elongated rectangular glass substrate 2. The display panel 1 is integrally attached to the front of the housing (not shown) of a car navigation system housing electronic equipment by bonding a resin molded body 3, which is a bonding portion provided on the back side of the glass substrate 2, to a bonding portion provided on the front frame of the housing. This constitutes the display surface of the car navigation system. The glass substrate 2 is formed by providing black colored areas 22 in a band-like manner along the four peripheral edges on the back side of a transparent, horizontally elongated rectangular glass plate 21, resulting in an overall thickness of approximately 0.35 mm. The colored portion 22 is formed by laminating an adhesive layer 22b onto a printed layer 22a provided on the back side of the glass plate 21. In detail, the colored portion 22 is formed by applying an ink made of acrylic urethane resin containing a silane coupling agent and a black coloring agent in a frame-like manner along the peripheral edge of the back side of the glass plate 21 to form a printed layer 22a. After the printed layer 22a dries, a two-component curing polyurethane ink is applied to its surface and dried to form an adhesive layer 22b on top of the printed layer 22a. As shown in Figure 1, the resin molded body 3 is integrally attached to the top edge and left and right side edges of the glass substrate 2, on the surface of the colored portion 22 formed on the back side of the glass substrate 2. More specifically, as shown in Figure 2, the resin molded body 3 is formed by integrally fixing a main body portion 31, which has a substantially cylindrical portion that connects to the part of the housing to be joined, to the surface of the glass substrate 2 via a base portion 32 positioned at the joint with the glass substrate 2. The main body portion 31 is formed using a resin material with high rigidity (tensile strength, bending strength) mainly composed of polycarbonate resin, and the base portion 32 is formed using a polyester thermoplastic elast