JPH068335A - Manufacture of film-laminated metal sheet having no bubble contamination - Google Patents

Abstract

PURPOSE:To provide a manufacturing engineering not causing bubble contamination at the time of laminating a film on the metal sheet continuously at a high speed of 100m/min. or above. CONSTITUTION:A film is pressed by a roll and thermocompression-bonded on a coil-shaped metal sheet by means of a laminate roll on which rubber is lined smoothly on a metal roller, having each dimension and the properties of diameter of roll (D), 400mm or less, thickness of lining (T), 40mm or lower, DXT=6000 or below, hardness of rubber, 60 deg. or higher, maximum surface pressure in nip width, 15kgf/cm<2> or more, at a line speed of 100m/min. or higher. As a film to be laminated on the metal sheet, any films are available in the case of a film having self-adhesiveness or in the case of a film being laminated via an adhesive. Moreover, this method is particularly effective when a film is laminated on both the surfaces of a metal sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The method of the present invention relates to a film laminating technique, and relates to a method for producing a laminated metal plate in which a film is laminated on a coiled metal plate at high speed.

More specifically, the present invention relates to a method for producing a film-laminated metal strip with little bubble entrainment in continuously performing film lamination on a metal plate with a coil at a high speed of 100 m / min or more.

[0003]

2. Description of the Related Art A so-called laminated metal material, in which a film is laminated on a metal, is widely used for building materials, home electric appliances and the like, and has a long history.

Such laminated metal materials include a method of laminating a film on a metal via an adhesive, a method of thermally adhering to a metal by utilizing self-adhesiveness of the film, and a method of laminating.

There are methods of obtaining a laminated metal plate, such as a method of laminating to a cut plate and a method of continuously laminating a coiled metal plate. When a laminated metal plate is continuously produced from a coiled metal plate, Mostly line speed 3
At present, it is performed at 0 m / min to 70 m / min.

The line speed is 30 m / min to 70 m / min.
The reason for doing so is that air bubbles are generated due to the entrainment of air as the speed increases, which is a quality problem.

Secondly, since the laminated metal plate is a relatively high-grade product, the quality control of the product is strict, and it is possible to check the defects during running.

However, in recent years, the development of laminated steel sheets for containers has been studied, and there is a tendency toward higher speed in terms of productivity.

However, although technically interested in speeding up, the current situation is that speeding up has not progressed easily in terms of quality.

[0010]

The method of the present invention has been made in view of the above situation, and is a laminated metal excellent in quality and productivity at a high speed of 100 m / min or more, with no entrapment of air. It is intended to provide a method for manufacturing a plate.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a technique for laminating a film on a metal strip. When laminating a film on a metal strip with a laminating roll in which rubber is smoothly lined on the metal roll, the laminating roll is used. Roll diameter (D) of 400 mmφ or less, rubber lining thickness (T) of 40 mm or less, and D × T = 6000 or less, and the hardness of the lined rubber is 60 ° or more, and 100 m /
It is a method for producing a film-laminated metal strip without bubble entrapment, which is characterized in that it is pressure-bonded continuously at a high speed of not less than a minute and laminated.

[0012]

The present invention will be described in detail below.

The method of the present invention includes a method of adhering a film to a metal plate via an adhesive, a method of adhering a self-adhesive film to a metal plate, etc., in which a coiled metal plate is continuously pressure-bonded. It is about the manufacturing method of a metal plate.

The method of the present invention is intended for continuously laminating a film on a coiled metal plate, and the line speed (laminating speed) is 100 / min or more.

First, the pressure bonding roll will be described.

The pressure roll applied to the method of the present invention is
At least the surface in contact with the film is a metal roll with rubber lining.

Whether an adhesive is used in the method of the present invention,
Even if a self-adhesive film is used, heat is often used for adhesion in any case, and the heat resistance of the pressure-bonding roll is important.

From this point of view, the lining rubber is preferably silicon rubber or fluorine rubber.

Lamination roll diameter (D) is 400 mmφ
It is the following. The roll diameter is related to the rubber lining thickness and line speed described later.

When the line speed is slow, for example, when the line speed is about 30 m / min, it is possible to perform lamination without bubbles due to air entrapment even at 450 mmφ or 500 mmφ, but at a speed of 100 m / min or more, the roll diameter is 4 mm.
It is necessary to be less than 00 mmφ.

The reason for this is also related to the lining thickness of the rubber lining, but if the roll diameter is large, the crush width of rubber, which is called the nip width or nip length, becomes large, and the pressure applied to the laminating roll is the same. However, the pressure per unit area becomes small.

It is considered that when the pressure per unit area is low, the pushing out of the air between the metal plate and the film is weakened, and the air is easily entrained.

Next, in the method of the present invention, the rubber lining thickness (T) is set to 40 mm or less.

The lining thickness of 40 mm or less has a relationship with the roll diameter (D), but if it exceeds 40 mm, the nip width becomes large, and therefore the pressure per unit area becomes low, so that the metal plate and the film are not in contact with each other. The pushing of the air between them becomes weak, and the air is easily caught.

In the method of the present invention, the relationship between the laminating roll diameter (D) and the rubber lining thickness (T) is important,
D × T = 6000 or less.

When the value of D × T exceeds 6000, the pushing out of the air becomes weak and the air is easily entrained.

The relationship between the diameter of the laminating roll and the thickness of the lining is to keep the nip width within a fixed range, and this effectively acts to prevent the entrapment of air.

Further, the relationship between the diameter of the laminating roll and the thickness of the rubber lining in the method of the present invention shown in FIG. 1 is shown. The value of D × T should be reduced as the line speed increases to prevent air entrapment. Is effective against.

FIG. 1 shows that it is necessary to reduce the thickness of the rubber lining as the diameter of the laminating roll increases. In the present invention, the lower side surrounded by the line speed of 100 mpm is the applicable range.

The hardness of the lining rubber is 60 ° or more.

When the hardness of the lining rubber is 60 ° or less,
Since the nip width of the lining rubber becomes large and the pressure per unit area becomes small, the effect of preventing entrapment of air becomes small.

In particular, since the rubber hardness decreases due to the influence of heat,
It is necessary to secure at least 60 °, and in this sense, the rubber hardness is 65 ° or more, more preferably 70 ° or more.

Incidentally, 60 ° referred to here means JIS K.
According to 6301, it means a value measured by a spring type hardness tester C type.

In the method of the present invention, the laminating pressure is 15 Kgf / cm ² or more as the maximum surface pressure in the nip width.

15 kgf as the maximum surface pressure in the nip width
If it is / cm ² or more, it is effective in preventing air entrapment, and if it is 15 Kgf / cm ² or less, the effect is small. The maximum surface pressure in the nip width is preferably ²⁰ Kgf / cm ² or more.

Furthermore, the maximum surface pressure in the nip width needs to be increased as the line speed increases.

The maximum surface pressure in the nip width can be measured with a pressure measuring film (for example, Fuji Film prescale).

The surface pressure is ideally measured if the pressure during actual operation can be measured, but in the present invention, it is limited to the pressure in a static state.

In the method of the present invention, the line speed is 100 m.
Although the line speed is limited to at least 1 minute, the line speed can be increased by the laminating roll diameter, the rubber lining thickness, and the relationship between the laminating roll diameter and the rubber lining thickness (D × T = 600.
0), the hardness of the lining rubber, the maximum surface pressure in the nip width as the laminating pressure, and other conditions are satisfied before they are achieved.

Further, it is needless to say that these individual conditions need to be set to optimum conditions comprehensively in relation to the laminating speed, and by doing so, production of a film laminated metal strip free from bubble entrapment. Is possible.

The method of the present invention is applied to both the case where the film is laminated only on one side of the film laminated metal plate to be obtained and the case where the film is laminated on both sides.

When the film is laminated on only one side of the film-laminated metal sheet to be obtained, a metal roll, a metal heating roll, a rubber lining roll, etc. can be applied to the roll contacting the opposite side, and this roll is particularly limited. Not something to do.

The method of the present invention is particularly effective for laminating both sides of the film laminated metal sheet to be obtained.

In the method of the present invention, a thermocompression bonding method is applied. A method of laminating a film on a metal plate via an adhesive, and a method of laminating a self-adhesive film on a metal plate. Regardless of which method is adopted, it is effective to supply the film to the heated metal plate and laminate it with a laminating roll.

As a method for heating the metal plate, any method such as an electric heating method, a high frequency induction heating method, a method of heating the metal plate through a hot stove, or a combination of these methods may be used.

Hereinafter, the effects of the method of the present invention will be specifically shown in Examples.

[0047]

【Example】

[0048]

[Example 1] 18 mm silicon rubber having a rubber hardness of 65 °
It is a laminated roll with a diameter of 300 mm and a TFS (Tin Free S) with a plate thickness of 0.20 mm.
(Chromium-chromate steel sheet) is heated by the electric heating method to reach a plate temperature of 200 ° C., the maximum surface pressure in the nip width is 18 Kgf / cm ² , and the line speed is 150 m /
For 25 minutes, a 25 μm co-polyester resin film was continuously laminated on one side so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate has a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0053]

[Example 2] 12 mm of silicone rubber having a rubber hardness of 68 °
It is a laminated roll with a diameter of 250 mm and a TFS (Tin Free S) with a thickness of 0.20 mm.
steel (chromium-chromate steel sheet) is heated by an electric heating method to reach a plate temperature of 225 ° C., the maximum surface pressure in the nip width is 35 Kgf / cm ² , and the line speed is 200 m /
For 30 minutes, a 30 μm co-polyester resin film was continuously laminated on one side so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate has a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0058]

[Embodiment 3] Silicon rubber having a rubber hardness of 80 ° is 10 mm.
It is a laminated roll with a diameter of 220 mm and a TFS (Tin Free S) with a plate thickness of 0.20 mm.
(Tel chrome-chromate steel sheet) is heated by an electric heating method to reach a plate temperature of 225 ° C., the maximum surface pressure in the nip width is 43 Kgf / cm ² , and the line speed is 250 m /
For 30 minutes, a 30 μm co-polyester resin film was continuously laminated on one side so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate has a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0063]

[Embodiment 4] Silicon rubber having a rubber hardness of 70 ° is 10 mm.
With a laminated roll having a roll diameter of 220 mm, an aluminum plate having a plate thickness of 0.28 mm was heated by an electric heating method to reach a plate temperature of 225 ° C., at a maximum surface pressure in the nip width of 32 Kgf / cm ² , Line speed 250
A 30 μm co-polyester resin film was continuously laminated on one side at a rate of m / min so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate has a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0068]

[Embodiment 5] Using a laminate roll having a roll diameter of 200 mm and lining 7 mm of silicone rubber having a rubber hardness of 70 °, a TFS steel plate having a plate thickness of 0.20 mm is heated by an electric heating method to reach a plate temperature of 225 ° C. When the maximum surface pressure in the nip width was 42 Kgf / cm ² , the line speed was 2
A 30 μm co-polyester resin film was continuously laminated on both sides simultaneously at 00 m / min.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0072]

Example 6 Silicone rubber having a rubber hardness of 70 ° is 35 mm
With a lined roll with a roll diameter of 150 mm, a TFS steel plate with a plate thickness of 0.20 mm was heated by an electric heating method, and when the plate temperature reached 225 ° C., the maximum surface pressure in the nip width was 30 Kgf / cm ² , and the line A 30 μm co-polyester resin film was continuously single-sided laminated at a speed of 200 m / min so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate has a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, there was no bubble entrapment and a good laminate material was obtained.

[0077]

[Comparative Example 1] Silicon rubber having a rubber hardness of 68 ° is 30 mm
With a lined roll having a roll diameter of 450 mm, a TFS steel plate having a plate thickness of 0.20 mm was heated by an electric heating method to reach a plate temperature of 225 ° C., and when the maximum surface pressure in the nip width was 10 Kgf / cm ² , the line A 30 μm co-polyester resin film was continuously single-sided laminated at a speed of 150 m / min so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate had a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of entrapped air bubbles in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, bubble entrapment occurred and a good laminate could not be obtained.

[0082]

[Comparative Example 2] Silicone rubber having a rubber hardness of 65 ° is 25 mm
With a lined roll with a roll diameter of 300 mm, a TFS steel plate with a plate thickness of 0.20 mm was heated by an electric heating method to reach a plate temperature of 225 ° C., at the maximum surface pressure in the nip width of 13 Kgf / cm ² , the line A 30 μm co-polyester resin film was continuously single-sided laminated at a speed of 150 m / min so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate had a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the laminated metal plate thus obtained was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, bubble entrainment occurred and a good laminate material could not be obtained.

[0087]

[Comparative Example 3] 45 mm silicon rubber having a rubber hardness of 70 °
Using a lined laminating roll with a diameter of 200 mm, a TFS steel plate with a plate thickness of 0.20 mm was heated by an electric heating method to reach a plate temperature of 225 ° C., at the maximum surface pressure in the nip width of 13 Kgf / cm ² , the line A 30 μm co-polyester resin film was continuously single-sided laminated at a speed of 200 m / min so that the film surface was on the laminating roll side.

The roll on the opposite side of the steel plate had a roll diameter of 3
A 00 mm heatable metal roll was used.

The state of air bubbles entrained in the thus obtained laminated metal plate was observed with a microscope.

The results are shown in Table 1.

As can be seen from Table 1, bubble entrainment occurred and a good laminate material could not be obtained.

[0092]

[Table 1]

[0093]

[Table 2]

[0094]

As described above, by applying the method of the present invention, air bubbles are generated in the laminating material due to the entrainment of air that occurs when a film is continuously laminated at a high speed of 100 m / min or more. Is suppressed, and a good laminated metal plate can be obtained.

As a result, the productivity is remarkably improved,
The economic merit is great.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a laminating roll diameter and a rubber lining thickness in the present invention.

Claims (2)

[Claims] 1. When laminating a film on a metal strip with a smooth laminating roll having a rubber lining on a metallic roll, the laminating roll has a roll diameter (D) of 400 m.
mφ or less, rubber lining thickness (T) is 40 mm or less,
And D × T = 6000 or less, the hardness of the lined rubber is 60 ° or more, and continuous pressure bonding is performed at a high speed of 100 m / min or more to laminate the film. . 2. The laminating pressure for laminating the film on the metal strip is 15 kg as the maximum surface pressure in the nip width.
^{2. The} method for producing a film-laminated metal strip having no bubble entrapment according to claim 1, wherein the layers are laminated by pressure-bonding continuously with a pressure-bonding force of f / cm ² or more.