JPS6121827B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of laminating a film to a glass plate.

Laminating a film on a glass plate is done to prevent scattering when the glass is broken and to prevent dew condensation on the glass.In recent years, by using specially processed films that have selective visible light transparency, For example, film laminated glass plates can be used to increase the cooling effect by blocking heat rays and ultraviolet rays, and to prevent deterioration of the contents inside the window, so the types of film laminated glass plates have diversified and are increasingly being used industrially. I'm getting used to it.

The conventional method of laminating a film on a glass plate is to stack the film on a glass plate that is left still and press the film with a pressure roller or the like to apply it to at least one of the overlapping surfaces of the glass plate and the film. A batch method was used in which the two parts were joined together using an adhesive or a pressure-sensitive adhesive.

On the other hand, when bonding and laminating materials that are bendable, such as woven or knitted fabrics, non-woven fabrics, paper, film, leather, etc., or materials that do not break even if bent to some extent, such as plywood, iron plates, etc., a pair of rotating pressing rollers is used. A continuous method is used in which they are fed and bonded one on top of the other in between.

The former batch method is a method in which the glass plates are less likely to be damaged, but it has the major disadvantage that it is difficult to obtain uniformity of bonding between batches, and the productivity is low. The latter method essentially provides high productivity and eliminates batch-to-batch differences;
When used to laminate a film on a glass plate, even if a rubber-coated pressure roller is used, the glass plate is extremely susceptible to damage, and once damaged, the surface of the pressure roller will be damaged, making it difficult to repair or repair the glass plate.
It requires a lot of cost and effort to replace, and especially when the glass plate is transparent instead of having no difference between batches,
This method has a major drawback in that even slight non-parallelism in film feeding can cause conspicuous asymmetry in the continuous undulation of the bond.

The present invention provides a method for laminating a film on a glass plate using a pair of rotating pressure rollers, which does not damage the glass plate or cause uneven bonding, and provides a stable and beautiful finish. This is what we provide.

In the present invention, a pair of pressure rollers coated with rubber have a hardness of 60°H or more (according to the Shore A hardness tester for rubber).
90°H or less, and when supplying the film between the pressing rollers by polymerizing it with the glass plate, make sure to give a contact angle of 100° or more with the roller surface, and the average pressure of the pressing roller against the glass surface. is maintained between 10Kg/cm ² or less and 0.01Kg/cm ² or more.

That is, by using a pair of pressure rollers that are rubber-coated rollers with hardness within the above-mentioned range, and by maintaining the pressure of the pressure rollers within the above-mentioned range at an average pressure related to the contact area between the glass surface and the pressure rollers, the glass plate can be pressed. A bond is created that will not cause damage, and since the film is brought into contact with the pressure roller at an angle of 100° or more when the film is fed between the pressure rollers, there is no possibility of unparallelism in the film feeding. , an excellent effect was achieved in that no undulation asymmetry appeared in the bond.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a side view showing an example of the implementation of the present invention, and FIG. 2 is a partially enlarged side view. In the figure 1,
Reference numeral 1' designates a pair of pressure rollers rotated in the direction of the arrow, each of which is coated with rubber 1a and 1'a. 2 is a glass plate, 3 is a film, 4 is an adhesive applied to the film, and 5 is a table of a laminating machine. The pair of pressure rollers 1 and 1' have approximately the same surface hardness of 60°H or more and 90°H or less on the Shore A hardness tester for rubber, and the outer diameters are also made equal so that the same surface speed can be easily obtained. . If there is a slight difference in the surface hardness of the pressure rollers 1 and 1',
It is preferable to supply the glass plate and film 3 so that the glass plate 2 has the lower surface hardness. The film 3 is brought into contact with the pressure roller at a contact angle θ of 100° or more, and then the pair of pressure rollers 1,
It is supplied so as to reach the nip point of 1'. In the illustrated example, the adhesive 4 is applied to the film 3 side, but it may be applied to the glass plate 2 side or both, or an adhesive may be used instead of the adhesive. It will be done. The pressure with which the pressure rollers 1 and 1' press the glass plate 2 and the film 3 that are supplied between them to overlap is the force that pushes the two rollers together, for example, as shown in the figure, the pressure roller 1 is 'As shown above,
The sum of the weight of the pressure roller 1 and the spring force or additional load that presses the pressure roller 1 downward is the area of the pressure roller 1' that contacts the glass plate 2, that is, the area L shown in the second diagram, the glass plate 2, and the film 3. The average pressure divided by the product of the polymerization width is 10Kg/ ^cm2 or less, 0.01Kg/cm2 ^or more, preferably 1.0Kg/ ^cm2 or less, 0.05Kg/cm2 ^{or more} , particularly preferably 0.5 or less, 0.1Kg/cm2 ^or more. As is,
Adjust and set the spring force or additional load.

When the glass plate 2 and the film 3 are laminated by the pressing rollers 1 and 1' while satisfying the above-mentioned conditions, stable and uniform bonding can be performed without damaging the glass plates.

On the other hand, if the surface hardness of the pressure roller is low, the pressure of the pressure roller as described above to create a strong bonding force between the glass plate and the film will cause significant deformation and flattening of the pressure roller.
increases, and when the pressure roller rotates to recover from the deformation, a kick-up effect appears, making it impossible to obtain a uniform bond.On the other hand, if the surface hardness is high, glass plates, films, adhesives, etc. It becomes impossible to absorb minute variations in thickness, and the glass plate is more likely to break.If the pressure of the pressure roller is lowered to avoid breakage of the glass plate, a strong and uniform bond cannot be obtained. If the pressure of the pressure roller becomes high, the glass plate will be easily damaged, and the adhesive will be squeezed out, causing problems such as waves of adhesive etc. occurring in the bond.If the pressure is low, the bonding force will becomes weaker. Furthermore, if the contact angle for feeding the film along the surface of the pressure roller is less than 100°, minute changes in the thickness of the glass plate, film, adhesive, etc., and slight unbalanced changes in tension will affect the film feeding. Nonparallelism occurs, and ripples are likely to occur in the joint. Since the more transparent the glass plate, film, etc., the more noticeable the ripples in bonding are, the contact angle condition is particularly important in obtaining a film-bonded glass plate with high visible light transmittance.

In the present invention, a transparent glass plate is used, and the film is a thin metal film of gold, silver, copper, palladium, etc. on an organic polymer film of polyester, nylon, polyvinyl chloride, cellulose resin, etc.
Heat rays can be blocked by using visible light transparent thin films of metal oxides such as In ₂ O ₃ , SnO ₂ , Ca ₂ SnO ₄ , TiO, TiO _{2 ,} etc., either singly or laminated in combination. A film-bonded glass plate with excellent properties and visible light transmittance can be obtained. In this case, in particular, a film bonded with a metal thin film sandwiched between titanium oxide thin films and laminated on an organic polymer film can be obtained. By using a material having this property, it is possible to obtain a product that has even better properties as described above and also has excellent durability. When using a laminated structure film of metal or metal oxide thin films as described above, it is preferable to polymerize the surface of the organic polymer film to a glass plate. It is preferable to coat with a protective film of resin, silicone resin, or the like.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of the implementation of the present invention, and FIG. 2 is a partially enlarged side view. 1, 1'...Press roller, 1a, 1'a...Rubber coating, 2...Glass plate, 3...Film, 4...
Adhesive, 5...Table, θ...Contact angle.

Claims (1)

[Claims] 1. A method in which a glass plate and a film are supplied in a superposed manner between a pair of rotating pressure rollers, and the two are integrally joined by an adhesive or a pressure-sensitive adhesive interposed between the two. , the hardness of the rubber coating on the pair of pressure rollers (according to Shore A hardness tester for rubber)
When feeding the film between the pressure rollers, provide a contact angle θ of 100° or more with the roller surface, and keep the average pressure of the pressure roller against the glass surface at 10Kg/ ^cm2 or less
A method for laminating a glass plate film, characterized in that the temperature is maintained between 0.01Kg/cm ² or more. 2. Claim 1, in which the glass plate is transparent, and the film is a laminate structure having visible light transmittance, in which at least one metal thin film and/or metal oxide thin film is provided on an organic polymer film. A method of laminating a film on a glass plate as described. 3. The film has a laminate structure with visible light transparency, in which a titanium oxide thin film, a metal thin film, and a titanium oxide thin film are stacked in that order on an organic polymer film, and if necessary, a protective thin film of a coating resin layer is further provided thereon. A method for laminating a film on a glass plate according to claim 2, which is a glass plate.