JPH059246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for integrally forming a window in which a molding is integrally joined to the peripheral edge of plastic glass.

[Prior art]

As shown in FIG. 9, a window in which a resin molding 4 is integrally bonded to the peripheral edge of a plastic glass 3 is known.

Conventionally, such an integrally molded window is manufactured by applying a hard coat treatment to the surface of the plastic glass 3 using a silicone-based agent or the like to protect the surface, then applying an adhesive to the peripheral edge of the plastic glass 3, and then attaching the plastic glass 3 to the surface of the plastic glass 3. 3 is placed in a mold and molding resin is injected onto the peripheral edge portion (see FIG. 6, described later), and the molding 4 is integrally joined to the peripheral edge of the plastic glass 3 (see FIG. 7, described later).
(see figure). That is, it is integrally molded by insert injection molding.

[Problem to be solved]

However, as mentioned above, when an adhesive is applied to a plastic glass surface that has been hard coated, the adhesive is repelled by the water repellency of the hard coat treatment agent, making it difficult to apply it uniformly to the plastic glass surface. be. Therefore, in the window obtained by integrating the molding with the plastic glass as described above, there is variation in the adhesive strength between the molding and the plastic glass, and there is a risk that the bonded portion may peel off during use.

In addition, in order to solve this problem, a method has been proposed in which plasma treatment is performed after the hard coat treatment to improve the coating properties of the adhesive (Japanese Patent Application Laid-open Nos. 1983-121734 and 1982-121735). (see official bulletin). However, such a method requires high costs for plasma processing equipment and the like, which results in high costs for window products.

In view of these conventional problems, the present invention aims to provide a method for integrally molding a window with improved adhesive applicability and excellent adhesive strength.

[Means for solving problems]

In the present invention, the surface of plastic glass is hard-coated, then an adhesive is applied to the peripheral edge thereof, the plastic glass is then placed in a mold, and a molding resin is injected into the peripheral edge part. In the method of integrally molding a window in which a molding is integrally bonded to the peripheral edge of the plastic glass, an uneven surface is formed on the peripheral edge of the plastic glass in a plastic glass mold during the production of the plastic glass, and then an uneven surface is formed on the peripheral edge of the plastic glass. The method of integrally molding a window is characterized in that the surface is hard-coated and then an adhesive is applied.

In the present invention, when forming an uneven surface on the peripheral edge of plastic glass, an uneven surface such as a grain pattern is previously formed on the peripheral edge of the cavity in a mold for molding the plastic glass. This is done by injecting the plastic glass raw material into the mold and solidifying it. This transfers the uneven surface of the mold to the plastic glass.

The above-mentioned uneven surface may be arbitrary, such as irregularly shaped grain patterns, regular shaped unevenness, straight or curved grooves.
The depth of the uneven surface is preferably 5 to 50 μm. This is because if it is shallower than 5 μm, the wettability between the adhesive and the plastic glass is poor, and if it exceeds 50 μm, it is too deep and tends to cause the problem of poor coating on the convex portions.

Further, the above-mentioned peripheral portion is a portion to which an adhesive is applied, but both portions may be completely the same or may be slightly different. In other words, one of them may protrude slightly.

Further, the above-mentioned hard coat treatment is performed prior to applying the adhesive as in the conventional case. Examples of the hard coat treatment agent include polysiloxane-based silicone hard coat agents such as trimethoxysilane. In addition, UV (ultraviolet rays) can be used for radical polymerization systems such as thiolene type and acrylic type such as polyester and polyacrylate, or cationic polymerization systems such as epoxy resins.
There is a hardened hard coat.

In addition, such hard coating treatment involves dipping the plastic glass in the above-mentioned treatment agent,
This is done by roll coating. As a result, a hard coat treatment layer is formed on the surface.
However, this hard coat treatment layer has a thickness of 5 to 10 μm.
It is preferable that If it is less than 5μm, the surface protection of the plastic glass will not be sufficient, and if it is less than 10μm,
If it exceeds this, the uneven surface becomes shallow and the wettability of the adhesive may deteriorate.

Furthermore, examples of plastic glass include injection molded products of polycarbonate, acrylic, ABS resin, and the like. As the adhesive, there are nylon-based adhesives, urethane-based adhesives, and the like. In addition, resin moldings include polyvinyl chloride, urethane,
It is made of polyolefin, etc., and is integrally formed on the periphery of plastic glass by injection molding.

Next, as a method for forming the above-mentioned uneven surface, there is a method of sandblasting the peripheral edge of plastic glass that has been formed at one end.

This sandblasting method is a method of forming the uneven surface by hitting hard particles such as stainless steel, SiC (silicon carbide), carborundum, or the like against the peripheral edge with a high-speed air flow. The hard particles used are fine particles with a diameter of 0.1 to 1.0 mm. Also, the particle impact velocity on the plastic glass surface is 30 to 100 m/sec.

[Action and effect]

In the present invention, an uneven surface is formed on the peripheral edge of the plastic glass, and then a hard coat treatment is performed, and then an adhesive is applied. Therefore, the wettability of the adhesive to the peripheral edge is improved, and the adhesive can be uniformly applied to the peripheral edge of the plastic glass.

Therefore, according to the present invention, it is possible to provide a method for integrally molding a window with improved adhesive applicability and excellent adhesive strength. Also, manufacturing costs are low.

Furthermore, when the uneven surface is formed using a mold in the production of plastic glass, the uneven surface can be provided at the same time as the plastic glass is formed, and the process can be shortened.

In addition, when forming an uneven surface by sandblasting, the shape of the plastic glass,
The uneven surface can be provided on any part regardless of the area and shape of the peripheral portion forming the uneven surface.

〔Example〕

First Example Regarding the method of integrally molding a window according to this example,
With reference to FIGS. 1 to 9, the steps from molding plastic glass to integrally molding the window will be explained.

First, the method of forming plastic glass will be described. As shown in FIG. 5, the plastic glass is a right triangular plastic glass 3 with a textured pattern 25 as an uneven surface all over its peripheral edge 31. Such plastic glass 3
is manufactured using a mold 1 shown in FIG.

The mold 1 consists of a lower mold 11 and an upper mold 12. The lower mold 11 has a cavity 13 in the shape of a right triangle for molding plastic glass.
Inside the cavity, there are marks shown in Figs. 2 and 3 on its periphery.
As shown in the figure, a grain pattern 21 is formed.
Similarly, as shown in FIG. 4, the upper die 12 is
It has a cavity 14, and a grain pattern 21 is formed on the periphery of the cavity 14, similarly to the cavity 13.

Therefore, when molding the plastic glass 3, the guide rod 121 of the upper mold 12 is inserted into the guide hole 111 of the lower mold 11, and the cavities 13, 14 are molded.
A molded part is formed, into which the molten plastic glass raw material is poured, cooled and solidified.
This is shown in FIG. 5 above. A plastic glass 3 having a grain pattern 25 on the peripheral edge 31 is obtained.

Next, on the entire surface of the plastic glass 3,
Hard coat treatment is performed using a conventional method. The hard-coated plastic glass 3 is inserted into a mold consisting of a lower mold 45 and an upper mold 46, as shown in FIG. Then, resin 41 is placed inside the mold.
is injected, cooled and solidified to obtain an integrally molded window product in which the resin molding 4 is integrally fixed to the peripheral edge of the plastic glass 3, as shown in FIGS. 7 and 8.

In the mold shown in FIG. 6, the lower mold 45 and the upper mold 46 are made so that when they are combined, the cross-sectional shape of the resin molding 4 is formed by the cavities 451 and 461 thereof. Note that the molding resin does not flow into the recesses 452 and 462 of the upper and lower molds.

Furthermore, in the integrally molded window shown in FIGS. 7 and 9 above, as shown in FIG. 8, the state of the joint between the plastic glass 3 and the molding 4 is as follows.
A grain pattern 25 is formed on the surface of the plastic glass 3, a hard coat treatment layer 51 is formed on the surface of the plastic glass 3, an adhesive 52 is formed thereon, and a molding 4 is integrally provided on the adhesive 52.

As described above, according to the method of this example, it is possible to obtain a window in which the plastic glass 3 and the molding 4 are integrally and firmly bonded via the grain pattern 25, the hard coat treatment layer 51, and the adhesive 52. .

Second Embodiment In the first embodiment described above, the plastic glass 3 made of polycarbonate material was molded with a grain pattern 25 formed on the peripheral edge (width of approximately 1 cm from the peripheral edge). The grain pattern 25 has a depth of about 20 μm. Next, a polysiloxane hard coat treatment layer 5 is applied to the entire surface of the plastic glass 3, including the peripheral edge 31.
1 was formed to a thickness of about 8 μm. Then peripheral part 3
1 was coated with urethane adhesive to a thickness of about 10 μm. Then, using a mold consisting of a lower mold 45 and an upper mold 46 shown in FIG. 9th
Figure) was obtained.

In the above, the adhesive was able to be applied with good wettability onto the textured pattern at the periphery and was able to be applied uniformly. Moreover, in the window, the plastic glass 3 and the molding 4 were firmly joined.

Third Example In the first example, the grain pattern was formed on the peripheral edge of the plastic glass by sandblasting.

That is, SiC particles with a particle size of 0.3 mm were used, and these were made to collide with pressurized air at a flow rate of 80 m/sec against the peripheral edge 31 of the plastic glass 3.

As a result, an embossed pattern with a depth of about 30 μm was formed on the peripheral edge. After that, the window was integrally molded in the same manner as in the first embodiment.

[Brief explanation of drawings]

1 to 9 show the manufacturing method of the window in the first embodiment, FIG. 1 is a perspective view of a mold for molding plastic glass, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. Figure 3 is an enlarged cross-sectional view of part B in Figure 4, Figure 4 is a cross-sectional view of the above-mentioned mold, Figure 5 is a front view of plastic glass with a grain pattern on the periphery, and Figure 6 is window molding. FIG. 7 is a cross-sectional view showing the bonded state of the plastic glass and molding, FIG. 8 is an enlarged view of portion C in FIG. 7, and FIG. 9 is a front view of the window. 1... Molding mold for plastic glass molding, 2
1... Grain pattern of mold, 25... Grain pattern of plastic glass, 3... Plastic glass,
31...Periphery, 4...Mall, 45, 46...
Window mold, 51...Hard coat treatment layer.

Claims (1)

[Scope of Claims] 1 Hard coat treatment is performed on the surface of plastic glass, and then an adhesive is applied to the peripheral edge of the plastic glass, and then the plastic glass is placed in a mold, and molding resin is injected into the peripheral edge. do,
In the method of integrally molding a window in which a molding is integrally bonded to the peripheral edge of the plastic glass, an uneven surface is formed on the peripheral edge of the plastic glass in a plastic glass mold during the production of the plastic glass, and then an uneven surface is formed on the peripheral edge of the plastic glass. An integrated window molding method that involves applying a hard coat to the surface and then applying an adhesive. 2. Perform a hard coat treatment on the surface of the plastic glass, then apply an adhesive to the periphery, then place the plastic glass in a mold, inject molding resin into the periphery,
In the method of integrally molding a window in which a molding is integrally bonded to the periphery of the plastic glass, an uneven surface is formed on the periphery of the plastic glass by sandblasting, then a hard coat treatment is applied to the surface, and then bonding is performed. A method for integrally molding a window, which is characterized by applying an agent.