JPH068336A - Manufacture of film-laminated metal sheet having no bubble contamination - Google Patents

Abstract

PURPOSE:To provide a manufacturing engineering not causing bubbles 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 multistage type laminate roll with one or more back up rolls having a diameter of 1.5 times or more as long as the diameter of the laminate roll on which rubber is lined smoothly on a metallic 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. Besides, this method is particularly effective as the speed is higher and 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 entrainment of bubbles in continuously laminating a film 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. However, when a laminated metal plate is continuously produced from a coiled metal plate, most of them are manufactured. Line speed is 30m
Currently, the operation is performed at a speed of 70 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.

Further, since the deviation due to the bending vibration of the roll is more likely to occur at higher speeds and the pressure transmission in the width direction is not uniform, the uniformity of the quality in the width direction including the bubble entrainment problem is improved. There was a problem.

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. The current situation is that the speedup has not progressed quite easily.

[0010]

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

[0011]

SUMMARY OF THE INVENTION The present invention relates to a technique for laminating a film on a metal plate at a high speed. When laminating a film on a metal strip with a smooth film crimping roll having a rubber lining on a laminating metal roll. , The roll diameter (D) of the laminating roll is 400 mmφ or less, the rubber lining thickness (T) is 40 mm or less, and D × T =
A multi-stage laminating roll having a hardness of 6000 or less, a hardness of the lining rubber of 60 ° or more, and one or more backup rolls having a diameter 1.5 times or more the laminating roll diameter (D), and continuously at a high speed of 100 m / min or more. It is a method for producing a film-laminated metal strip without bubble entrapment, which is characterized in that it is pressure-bonded 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 roll of the film 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 applied with a smooth pressure roll in which a metal roll is lined with rubber.

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.

The pressure bonding roll diameter (D) is 400 mmφ or less. The pressure bonding roll diameter is related to the rubber lining thickness and line speed, which will be described later.

The pressure-bonding roll diameter is 450 mmφ or 500 mmφ when the line speed is low, for example, at about 30 m / min.
Lamination is possible without generating bubbles due to air entrapment, but at a speed of 100 m / min or more, the roll diameter needs to be 400 mmφ or less.

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

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.

Further, the smaller the pressure-bonding roll diameter, the more effective it is, but the smaller the roll diameter, the greater the roll deflection in the plate width direction, and the laminating pressure becomes uneven.

A backup roll, which will be described later, compensates for this point, but it is desirable to secure a pressure roll diameter (D) of 100 mmφ or more.

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 pressure roll diameter (D), but if it exceeds 40 mm, the nip width becomes large and the pressure per unit area becomes low, so that the metal plate and the film are reduced. The air is weakly pushed out during the period, and the air is easily trapped.

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

When the value of D × T exceeds 6000, the push-out of air becomes weak and the air is apt to be trapped.

The relationship between the diameter of the pressure-bonding 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.

Furthermore, although 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 the inclusion of bubbles. Is effective against.

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

The term 60 ° referred to here is 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.

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

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 stationary state.

Next, the backup roll will be described.

In the method of the present invention, a multi-stage roll having at least one backup roll having a diameter 1.5 times or more the roll diameter (D) of the laminating roll is applied.

As described above, the higher the line speed, the more easily the air bubbles are entrained, and as described above, it is advantageous that the pressure bonding roll diameter (D) is small in order to completely prevent entrainment of air bubbles. On the contrary, the smaller the diameter of the pressure-bonding roll, the greater the deflection of the pressure-bonding roll.

Therefore, if the films are laminated only with the small-diameter pressure rolls, the uniformity in the width direction becomes a problem.

The backup roll is intended to prevent displacement due to bending vibration of the pressure-bonding roll and to uniformly transmit pressure to the pressure-bonding roll.

In the method of the present invention, at least one backup roll having a diameter 1.5 times or more the diameter (D) of the pressure roll is applied.

When the diameter of the pressure-bonding roll is 1.5 or less, it is difficult to prevent the bending in the width direction although it is a rubber-lined pressure-bonding roll.

In particular, when applying a small-diameter pressure-bonding roll, the backup roll is important.

Although the number of backup rolls is one or more, it goes without saying that the optimum number depends on the pressure roll diameter, the laminating pressure, etc.

In the method of the present invention, the line speed is 100 m.
Although the line speed is limited to more than 1 minute, the line speed can be increased by the pressure bonding roll diameter, the rubber lining thickness, the relationship between the pressure bonding roll diameter and the rubber lining thickness (D × T = 6000), the hardness of the lining rubber, and the laminating pressure. It can be achieved only after the conditions such as the maximum surface pressure in the nip width and the presence of a backup roll are satisfied. The higher the speed, the more effective the multi-stage laminating roll having the backup roll.

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 as a result, the film laminating without bubble entrapment over the entire area. High-speed production of metal strips 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 sheet 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 plate to be obtained, a metal roll, a metal heating roll, a rubber lining roll, etc. can be applied to the roll contacting the other side, and this roll is not particularly limited. However, a metal roll is preferable in order to effectively apply the laminating pressure.

As for the backup roll, when the film is laminated on one side of a metal plate, the laminating roll side is applied, but when the opposite side is a metal roll, the backup roll may or may not be present. However, when laminating the film on both sides of the metal plate, it is essential to apply backup rolls on both sides.

Further, when the pressure roll diameter (D) is small, it is better to drive the backup roll, and in this case, needless to say, it is necessary to synchronize with the line speed.

As the backup roll, an alloy cast steel roll used for ordinary metal rolling, an ordinary iron roll, etc. are applied, but the surface smoothness of the rubber-lined laminate roll is ensured because it is difficult to corrode. In that sense, it is preferable to use chromium plating.

In the method of the present invention, a thermocompression bonding method is applied. A method of laminating a film on a metal plate with an adhesive or 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 air 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.

[0060]

【Example】

[0061]

[Example 1] 18 mm silicon rubber having a rubber hardness of 65 °
Lined roll diameter 300mm, length 1000mm
When the TFS (Tin Free Steel chrome / chromate steel plate) with a plate thickness of 0.20 mm and a plate width of 830 mm is heated by the electric heating method with the pressure roll of 200 mm, the maximum surface pressure in the nip width is reached when the plate temperature reaches 200 ° C. 18 Kgf / c
One-sided laminating of a 25 μm co-polyester resin film was continuously performed at m ² at a line speed of 150 m / min so that the film surface was on the pressure roll side.

On the pressure roll side, the roll diameter is 600 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome was used.

The roll on the opposite side of the steel sheet has a roll diameter of 4
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, there was no bubble entrapment and a good laminate material was obtained.

[0067]

[Example 2] 12 mm of silicone rubber having a rubber hardness of 68 °
Lined roll diameter 250 mm, length 1000 mm
With a pressure roll of 0.20 mm, a TFS (Tin Free Steel chrome / chromate steel plate) with a plate thickness of 0.20 mm and a plate width of 830 mm is heated by the electric heating method to reach a plate temperature of 225 ° C., and the maximum surface pressure in the nip width is reached. 35 Kgf / c
One-sided lamination of a 30 μm co-polyester resin film was continuously performed at m ² at a line speed of 200 m / min so that the film surface was on the pressure roll side.

On the pressure roll side, the roll diameter is 650 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome was used.

The roll on the opposite side of the steel plate has a roll diameter of 4
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.

[0072]

[Embodiment 3] Silicon rubber having a rubber hardness of 80 ° is 10 mm.
Lined roll diameter 220mm, length 1000mm
With a pressure roll of 0.20 mm, a TFS (Tin Free Steel chrome / chromate steel plate) with a plate thickness of 0.20 mm and a plate width of 830 mm is heated by the electric heating method to reach a plate temperature of 225 ° C., and the maximum surface pressure in the nip width is reached. 43 Kgf / c
One-sided lamination of a 30 μm co-polyester resin film at m ² at a line speed of 250 m / min with the film side facing the pressure roll.

On the pressure roll side, the roll diameter is 650 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome was used.

The roll on the opposite side of the steel plate has a roll diameter of 4
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.

[0078]

[Embodiment 4] Silicon rubber having a rubber hardness of 70 ° is 10 mm.
Lined roll diameter 220mm, length 1000mm
With the pressure bonding roll of No. 2, an aluminum plate having a plate thickness of 0.28 mm and a plate width of 900 mm is heated by an electric heating method to obtain a plate temperature of 225.
When the temperature reaches ℃, the maximum surface pressure in the nip width is 32 Kgf
/ Cm ² , line speed 250 m / min, 30 μm
The polyester resin film was continuously laminated on one side so that the film surface was on the pressure roll side.

The roll on the opposite side of the steel plate has a roll diameter of 4
A 00 mm heatable metal roll was used.

On the pressure roll side, the roll diameter is 650 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome 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.

[0084]

[Embodiment 5] A pressure-sensitive roll having a roll diameter of 200 mm and a length of 1000 mm lined with silicon rubber having a rubber hardness of 70 ° and having a thickness of 7 mm was used on both sides, and a plate thickness of 0.20 mm and a plate width of 8
30 mm TFS steel plate (Tin Free Steel)
(Chromium / chromate steel plate) is heated by an electric heating method to reach a plate temperature of 225 ° C., the maximum surface pressure in the nip width is 42 Kgf / cm ² , and the line speed is 200 m / min.
A 0 μm co-polyester resin film was continuously laminated on both sides simultaneously.

The roll diameter is 7 on both sides of the pressure roll.
A backup roll obtained by plating an iron roll having a length of 00 mm and a length of 1000 mm with chrome 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.

[0089]

Example 6 Silicone rubber having a rubber hardness of 70 ° is 30 mm
TF with a lined roll diameter of 150 mm and a length of 1000 and a plate thickness of 0.20 mm and a plate width of 830 mm
The maximum surface pressure in the nip width is 30 Kgf / c at the time when the S steel plate (Tin Free Steel chrome / chromate steel plate) is heated by the electric heating method and the plate temperature reaches 225 ° C.
One-sided lamination of a 30 μm co-polyester resin film was continuously performed at m ² at a line speed of 200 m / min so that the film surface was on the laminating roll side.

On the pressure roll side, the roll diameter is 800 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome was used.

The roll on the opposite side of the steel plate has a roll diameter of 4
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.

[0095]

Example 7 Silicone rubber having a rubber hardness of 80 ° is 10 mm
TF with a lined roll diameter of 150 mm and a length of 1000 and a plate thickness of 0.20 mm and a plate width of 830 mm
The maximum surface pressure in the nip width is 40 Kgf / c when the S steel plate (Tin Free Steel chrome / chromate steel plate) is heated by the electric heating method and the plate temperature reaches 225 ° C.
One-side laminating was performed for 30 μm co-polyester resin film at m ² at a line speed of 300 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 4
A 00 mm heatable metal roll was used.

On the pressure roll side, the roll diameter is 800 m.
A backup roll obtained by plating an iron roll of m and a length of 1000 mm with chrome was used.

The roll on the opposite side of the steel plate has a roll diameter of 4
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, there was no bubble entrapment and a good laminate material was obtained.

[0102]

[Comparative Example 1] Silicon rubber having a rubber hardness of 68 ° is 30 mm
Lined roll diameter 450mm, length 1000mm
TPS steel plate (Tin Free Steel chrome, 0.20 mm thick and 830 mm wide)
Chromate steel plate) is heated by the electric heating method and the plate temperature is 225
When the temperature reaches ℃, the maximum surface pressure in the nip width is 10 Kgf
/ Cm ² , line speed 150 m / min, 30 μm
The polyester resin film was continuously laminated on one side so that the film surface was on the pressure roll side.

The roll on the opposite side of the steel plate had a roll diameter of 4
A heatable metal roll of 00 mm was used, and a backup roll was not applied to the pressure roll.

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 entrainment occurred and a good laminate material could not be obtained.

[0107]

[Comparative Example 2] Silicone rubber having a rubber hardness of 65 ° is 25 mm
With a lined roll with a diameter of 300 mm, a TFS steel plate (Tin Free St) with a thickness of 0.20 mm
(Eel chrome / chromate steel sheet) is heated by the electric heating method, and when the plate temperature reaches 225 ° C, the maximum surface pressure in the nip width is 13 Kgf / cm ² , the line speed is 150 m / min, and the 30 μm co-polyester resin film is used. Was continuously laminated on one side so that the film surface was on the pressure roll side.

The roll on the opposite side of the steel plate had a roll diameter of 4
A heatable metal roll of 00 mm was used, and a backup roll was not applied to the pressure roll.

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.

[0112]

[Comparative Example 3] 45 mm silicon rubber having a rubber hardness of 70 °
A running pressure roll with a diameter of 200 mm and a TFS steel plate with a thickness of 0.20 mm (Tin Free St
(Eel chrome / chromate steel sheet) is heated by an electric heating method and when the plate temperature reaches 225 ° C, the maximum surface pressure in the nip width is 13 Kgf / cm ² , the line speed is 200 m / min, and the 30 μm co-polyester resin film is used. Was continuously laminated on one side so that the film surface was on the pressure roll side.

The roll on the opposite side of the steel plate has a roll diameter of 4
A heatable metal roll of 00 mm was used, and a backup roll was not applied to the pressure roll.

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 entrapment occurred and a good laminate material could not be obtained.

[0117]

[Comparative Example 4] Silicon rubber having a rubber hardness of 80 ° is 10 mm.
Pressure of lined roll diameter 150mm, length 1000
TF with a roll thickness of 0.20 mm and a plate width of 830 mm
S Steel Plate (Tin Free Steel Chrome / Black
(Mate steel plate) is heated by an electric heating method to a plate temperature of 225 ° C.
The maximum surface pressure in the nip width is 40 Kgf / c
m² At a line speed of 300 m / min and 30 μm
Laminate roll of ester resin film with film surface
One-sided lamination was carried out continuously so that it was on the side.

The roll on the opposite side of the steel plate had a roll diameter of 4 mm.
A heatable metal roll of 00 mm was used, and a backup roll was not applied to the pressure roll.

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, the inclusion of bubbles was partially generated, which was somewhat defective.

[0122]

[Table 1]

[0123]

[Table 2]

[0124]

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.

By this, 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. A laminating roll having a roll diameter (D) of 400 when laminating a film on a metal strip with a smooth film pressure-bonding roll having a rubber lining on a metal roll.
mmφ or less, rubber lining thickness (T) is 40 mm or less, D × T = 6000 or less, hardness of lined rubber is 60 ° or more, and laminating roll diameter (D)
A multi-layer laminating roll having one or more backup rolls having a diameter 1.5 times or more than that of the above, which is characterized in that it is continuously pressure-bonded at a high speed of 100 m / min or more to laminate the film laminated metal strip without bubble entrapment. Production method. 2. The laminating pressure when laminating a film on a metal strip is 15 kgf 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 / cm ² or more.