JP2568077B2 - Method for producing anti-fog laminated glass - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing an anti-fog laminated glass, and in particular,
The present invention relates to a method for producing an anti-fog laminated glass when a thin metal wire is used as an electric heating material.

[Prior Art] Conventionally, various types of anti-fog laminated glass have been provided as an anti-fog laminated glass that is used by enclosing an electric heating material in the joint surface of laminated glass and mounting it on the opening surface of automobiles and buildings. Has been done.

That is, as the electric heating material used in this case, a type in which a linear silver paste is printed and sintered on a mating surface of a glass plate, a type in which a transparent conductive film is stretched, and the like are used. There is a type using an ultrafine metal wire having a diameter of 10 to 40 μm.

Among them, from the viewpoint of fostering a higher-grade feeling, a type using a metal thin wire as an electric heating material has been attracting attention, and the demand thereof is gradually increasing.

FIGS. 4 (a) to 4 (e) show a thin metal wire for a laminated interlayer, which is interposed on a joint surface between an outer glass sheet and an inner glass sheet (not shown) in an anti-fog laminated glass of a type using a thin metal wire as an electric heating material. The process of arranging the power supply body and the power supply body is shown.

That is, according to the step (a), first, the laminated interlayer film 10
A plurality of thin metal wires 103 on one surface at a predetermined interval
Are arranged. In this case, since the bonding intermediate film 101 is formed by using a thermoplastic material such as polyvinyl butyral, the metal thin wires 103 can be easily heated and arranged to be bonded and held on the bonding intermediate film 101. In this way, the laminated interlayer 101 in which the thin metal wires 103 are arranged is
By the step (b), the side edge portions 105 located on both sides thereof are folded back, and the thin metal wire 103 is cut through the cut line 106.
The side edge portions 105 except for are separated. After a while
As shown in the process diagram of (c), a part of the metal thin wire 103 adhered and held is peeled off from the laminated intermediate film 101, and the thin metal wire 103 intersects on the laminated intermediate film 101 at the peeled portion. Lower power supply body 102 made of copper foil, etc.
Are heat-bonded. After that, the side edge portion 105 is returned to its original position as shown in the step (d), and the thin metal wire 1 of the portion corresponding to the lower power feeding body 102 is matched.
On top of 03, there is an upper side power feeding body 104 made of copper foil or flat braided copper wire.
Are arranged and fixed in a sandwich by an adhesive means such as soldering. After arranging the upper power feeding body 104 in this way, as shown in the step (e),
All the end portions 107 of the fine metal wires 103 protruding outside the 104 are cut off, and the side edge portions 105 defined by the cut lines 106 are also removed.

In this way, after finishing the disposition of the thin metal wires and the power supply body to the laminated interlayer, the laminated interlayer is interposed on the joint surface between the outer glass and the inner glass, and pressure-bonding is performed to perform anti-fogging combination. Glass was being manufactured.

[Problems to be Solved by the Invention] In the above-mentioned conventional method, since the metal thin wires and the upper and lower power feeding bodies are arranged on the laminated interlayer through the above steps, the steps of (b) are performed. When the side edge portion 105 of the intermediate film 101 is cut off, there is a risk that the thin metal wire 103 adhered and held to the side edge portion 105 may also be cut at the same time. Also, from a working point of view, the thin metal wire 10 from the laminated interlayer 101 is used.
Since it is necessary to peel off, solder the upper power supply body 104, and cope with the curved surface of the metal thin wire 103 on the glass plate curved surface, the number of steps of the whole work is large.
Moreover, when the applied voltage is high, it is necessary to use a relatively thick conductor having a large electric capacity, such as a flat braided copper wire, as the upper power supply body 104, and as a result, the overall thickness of the position where the power supply body is disposed increases. When attempting to press-bond the outer glass plate and the inner glass plate, excessive bending stress may be concentrated on this portion, which may lead to damage of the glass plates.

[Object of the Invention] In view of the problems of the conventional method, an object of the present invention is to provide a method for producing an anti-fog laminated glass capable of minimizing the number of overall working steps and improving the product yield. To provide.

[Means for Solving Problems] In order to achieve such an object, the present invention is configured as follows.

That is, in the method of the present invention, a pair of front side power feeding bodies is previously arranged by sintering a conductive paste at both side edges of the joint surface of either one of the outer glass sheet and the inner glass sheet to be joined. Along with the joint surface between the outer glass and the inner glass, a back side power feeding body is attached at a position corresponding to the front side power feeding body, and a plurality of thin metal wires are provided between these back side power feeding bodies. The structure is characterized in that after the interposing interlayer fixed film is interposed, the whole is pressure-bonded to integrally bond.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the structure of an anti-fog laminated glass obtained by the method of the present invention, which is a joint surface on either side of the outer glass 5 and the inner glass 6, for example, the outer glass 5 as shown. A pair of front side power feeding bodies 4 are formed by printing a conductive paste such as a silver paste in a predetermined width in advance on the left and right side edge portions of the joining surface on the side of and then sintering the paste. In addition, the laminated interlayer film 1 formed using thermoplastic polyvinyl butyral or the like,
A pair of back side power feeders are provided on a surface facing the front side power feeder 4 and at a position corresponding to and matching the front side power feeder 4.
2 and 2 also have a thin metal wire 3 between these back-side power feeding bodies 2 and 2.
Are previously arranged by means such as heat bonding.

In the present invention, the method for producing an anti-fog laminated glass having the above structure is performed through the following steps.

That is, as shown in FIG. 2, at both side edges of the joint surface of either the outer glass sheet 5 or the inner sheet glass 6 to be joined through the laminated interlayer film 1, as shown in FIG. By printing the paste with an appropriate width and sintering the glass plate at the time of heating when bending the glass plate, a pair of front power supply members 4, 4 are arranged in advance.

On the other hand, it is a surface of the laminated intermediate film 1 which is interposed between the outer glass sheet 5 and the inner glass sheet 6 and which faces the front side power feeding bodies 4, 4 and corresponds to these front side power feeding bodies 4, 4. As shown in Fig. 3 (a), the back side power supply unit
2 and 2 are attached by means such as heat adhesion. As shown in FIG. 3B, the wire diameter formed by using an appropriate wire material such as tungsten or molybdenum is about 10 to 40 μm between the back side power supply bodies 2 and 2 thus attached. A plurality of the thin metal wires 3 are arranged at appropriate intervals and are heat-bonded to the laminated interlayer 1 to be attached and held.

In this way, the laminated intermediate film 1 in which the back side power feeding bodies 2 and 2 and the thin metal wires 3 are adhered and held is disposed so that the back side power feeding bodies 2 and 2 face-to-face contact with the front side power feeding bodies 4 and 4. After that,
The outer plate glass 5 and the inner plate glass 6 are laminated. in this case,
When the edge of the laminated interlayer film 1 protrudes from the joint end surface between the outer glass sheet 5 and the inner glass sheet 6, it is cut off.
After the necessary adjustment work is performed, pre-compression bonding and pressure bonding processes are performed to integrally bond them to form an anti-fog laminated glass.

Since the method of the present invention is carried out through such steps, as in the conventional method shown in FIG. 4, the work of separating the side edge portion 105 of the laminated interlayer 101, the work of soldering the upper power supply member 104, or Fine metal wire 1 attached to the laminated interlayer film 1
It is possible to eliminate the process of peeling off 03,
Also, when separating the side edge portion 105 from the laminated interlayer 101,
There is no risk of accidentally cutting the thin metal wire 103.

Further, even when it is necessary to increase the voltage applied to the power feeding body, the print width of the front side power feeding body 4 can be widened and its electric capacity can be increased, so that it is possible to respond immediately. Since the thickness of the portion where the power supply body is disposed does not increase, bending stress does not concentrate when the outer glass plate 5 and the inner glass plate 6 are pressure-bonded to each other, and the glass plate is not damaged or combined with the glass plate. It is possible to prevent the phenomenon of peeling from the intermediate film.

[Effects of the Invention] As described above, according to the method of the present invention, even when it is necessary to increase the electric capacity of the power feeding body, it is possible to deal with it by simply increasing the plane width. It does not unnecessarily increase the overall thickness of the position where the power feeding body is arranged, and therefore, when joining the glass plates, it is possible to avoid the concentration of bending stress at this portion, and it is possible to prevent the stress from joining at the time of crimping and joining. It is possible to effectively prevent the breakage of the glass plate and the peeling phenomenon that occurs between the glass plate and the laminated intermediate film on the joint surface, and to manufacture the anti-fog laminated glass with good yield, and reduce the number of working steps. Therefore, it is possible to greatly contribute to the cost reduction of the product.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of an essential part showing an example of the structure of an anti-fog laminated glass obtained according to the present invention, and FIG. 2 is a plan view showing the arrangement of front side power feeding members on a glass plate, and FIG. (I)~
(B) is a front view showing a step of disposing the back side power supply body and the metal thin wire on the laminated interlayer, and FIG. 4 is a step of disposing the power supply body and the metal fine wire on the laminated interlayer by the conventional method. FIG. 1 ... Laminated intermediate film, 2 ... Back side power supply body, 3 ... Metal thin wire, 4 ... Front side power supply body, 5 ... Outer plate glass, 6 ... Inner plate glass

Claims (1)

(57) [Claims] 1. A pair of front-side power feeding bodies are arranged in advance by sintering a conductive paste at both side edges of a joint surface of either an outer glass sheet or an inner glass sheet to be joined, On the joint surface of the outer glass and the inner glass, a back side power feeder is attached at a position corresponding to the front side power source body, and a plurality of thin metal wires are arranged and fixed between the back side power sources. A method for producing an anti-fog laminated glass, characterized in that the laminated interlayer film is interposed, and then the whole is bonded by pressure bonding.