JPH10193511A - Manufacture of resin coated metal strip and cooling roll for laminate roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool the surface temperature of a laminate roll to a uniform temperature and to enable improvement of the homogeneity in crystallization of a resin layer, corrosion resistance and weldability of resin by a method wherein a crown of the central part in the width direction of a cooling roll is brought into contact with the central part in the width direction of the laminate roll and a resin film is thermally contact-bonded to a metal strip, while the laminate roll is cooled. SOLUTION: A crown 2 is formed in the central part in the width direction of a cooling roll 1. This crown is brought into contact with the central part in the width direction of a laminate roll so as to cool the central part in the width direction of the laminate roll of which the temperature becomes high. Thereby the surface temperature of this roll is made uniform and crystallization of a film contact-bonded thermally onto a metal strip is made homogeneous. On the occasion of preheating the metal strip, in other words, it is preheated to a target temperature thereof by utilizing the fall of the temperature of the opposite end parts in the width direction due to the transfer of the metal strip from the preheating to the laminate roll, and the central part in the width direction of the laminate roll of which the temperature becomes high due to the contact with a high-temperature part of the central part in the width direction of the metal strip is cooled by the contact thereof with the crown part of the cooling roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a resin-coated metal strip and a cooling roll for a laminating roll.

[0002]

2. Description of the Related Art In the production of a resin-coated metal strip (plate), a metal strip is preheated and laminated by a laminating roll (pressure roll).
At the same time, the resin film is guided to the front and back surfaces or one surface of the metal band of the laminating roll, and thermocompression-bonded (laminated) by the laminating roll. Therefore, when a resin film is thermocompression-bonded with a laminating roll as described above, a temperature control device is provided near the laminating roll to make the surface temperature uniform so that the crystallinity of the coated resin film is uniformly adjusted, and the corrosion resistance, etc. The improvement of
No. 92487.

[0003]

The temperature is controlled by contacting a cooling roll having a columnar width-wise straight shape with the laminating roll. However, in the case of the laminating roll, the metal band contact passing position (plate path) at the center in the width direction where the metal band is in contact with the metal band at both ends in the roll width direction (outside the plate path) is large. There is a temperature difference. This temperature difference causes heat transfer in the width direction, and a temperature difference occurs in the width direction in a portion (plate path) where the metal strip is in contact. Therefore, the center of the laminating roll in the width direction has a high temperature, and the both ends have a low temperature, so that the crystallinity of the resin film that is thermocompression-bonded to the metal band becomes non-uniform in the metal band width direction, and the corrosion resistance and the like become non-uniform. There is a problem that the quality of the resin-coated metal strip (plate) is deteriorated.
In addition, it is difficult to surely solve such a problem with the temperature control device as described above. The method of the present invention has been made in order to advantageously solve such problems, and ensures that the surface temperature in the laminating roll width direction is cooled to a uniform temperature suitable for resin film thermocompression by a cooling roll having a specified shape. It is another object of the present invention to provide a method of manufacturing a resin-coated metal strip (plate) and a cooling roll of a laminating roll.

[0004]

The feature of the method of the present invention is that a crown formed at the center of the cooling roll in the width direction abuts against the center of the laminating roll in the width direction to cool the center of the laminating roll in the width direction. A method for producing a resin-coated metal strip, wherein the resin film is thermocompression-bonded to the metal strip. And a cooling roll for a laminating roll, characterized in that a crown is formed at the center in the roll width direction.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the crown formed at the center in the width direction of the cooling roll of the present invention is, for example, a crown 2 formed at the center in the width direction of the cooling roll 1 as shown in FIGS. 2a, 2b and 2c. Then, the crown 2 is brought into contact with the center of the laminating roll in the width direction, and the center of the laminating roll in the width direction, which is heated to a high temperature as described above, is cooled.
The surface temperature in the laminating roll width direction can be made uniform, and the crystallinity (crystal orientation) of the thermocompression-bonded resin film to the metal strip can be made uniform. In other words, when preheating the metal strip, the temperature of the both ends in the width direction is reduced by the movement of the metal strip from the preheating to the laminating roll. The central part in the width direction of the laminating roll, which has become higher in temperature, is cooled by the crown contact of the cooling roll. Thus, the central part in the metal band width direction during the resin film thermocompression bonding can be cooled to the target temperature, and the crystallinity (biaxial orientation) of the resin film to be thermocompression bonded can be made uniform.

[0006] The crown height H of such a cooling roll is 0.2 to 5 mm and the width D is 10 to 800 mm. The central part in the width direction of a generally used metal band is reliably cooled to a target temperature. Can be. In addition, a preheating temperature of 80 to 250 ° C. at the time of thermocompression bonding of a resin film generally used for a resin-coated metal strip, and a temperature of 150 to 3 at the time of thermocompression bonding of a metal strip.
At 50 ° C, the surface temperature of the laminate roll is 50 to 200 ° C,
The resin film is thermocompression-bonded to the metal strip and cooled with a laminating roll at the same time. After the progress of melting of the resin layer is suppressed and the crystallinity is adjusted to be uniform, it is immersed and passed through the cooling water. The temperature is 5-18
Since the center of the laminating roll in the width direction becomes higher as the passing speed becomes higher at 0 ° C., the surface temperature of the cooling roll crown is controlled to the lower side.

Depending on the passing speed of the cooling roll, the kind of the resin film, etc., one or a plurality of the cooling rolls are disposed in contact with the laminating roll to cool the central part in the laminating roll width direction and to make the entire width in the metal band width direction uniform. The thermocompression bonding of the resin film is performed while controlling the temperature.

Next, an example of the method of the present invention will be described with reference to the drawings. In FIG. 1, the metal strip 3 is pre-heated by a pre-heating device 4 and introduced between the laminating rolls 5 and 5a. When the resin films 6 and 6a are thermocompression-bonded to the metal band 3 by the rolls 5 and 5a, the cooling rolls are formed on the laminating rolls 5 and 5a at the center in the width direction at the center in the width direction of the present invention shown in FIG. When the crown 2 is brought into contact with and moved between the laminating rolls 5 and 5a from the exit side of the preheating device 4, the metal band 3 whose both ends in the width direction are cooled to a lower temperature than the central portion and whose central portion is heated to a higher temperature. While cooling the laminating rolls 5 and 5a whose central portions in the width direction have been heated to a high temperature, the resin films 6 and 6a are thermocompression-bonded to the metal band 3 at the same time as the central portions of the metal band 3 in the width direction are cooled. By cooling the temperature unit, a resin film 6,6a with thermocompression bonding to the metal strip 3, in which in the width direction uniformly cooled uniformly adjust the crystallinity of the coating resin layer. In the figure, reference numeral 7 denotes a cooling device (water cooling device) for cooling the resin-coated metal strip 3a after the thermocompression bonding of the resin film.

[0009]

Next, examples of the method of the present invention will be described together with comparative examples.

[Table 1]

[0010]

[Table 2] (continuation of Table 1)

Note 1: Steel strip is used for the metal strip. Note 2: The distance between the preheating output side and the RR is the distance between the preheating device and the laminating roll. Note 3: PET (polyethylene terephthalate) film is used for the resin film. Note 4: Cooling roll types a, b, and c are a,
These are cooling rolls of b and c shapes. Note 5: The resin crystallinity is determined by thermocompression bonding of a resin film to a metal strip and the biaxial orientation of the resin layer of the resin-coated metal strip after cooling. The ends are the ends in the width direction of the resin-coated metal strip (both ends). 30 mm, center part is a part in both ends in the width direction end. The value at the center is a relative value when the end is 1, and indicates the deviation of the crystallinity in the width direction.

[0012]

According to the present invention, a resin-coated metal strip (plate) is provided.
The crystallinity of the resin layer can be made uniform (particularly in the width direction), and the corrosion resistance, resin adhesion, etc. can be improved, so that the quality of the resin-coated metal strip (plate) can be improved. And other excellent effects.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the method of the present invention.

FIG. 2 is a side view showing the cooling roll of the present invention.

[Explanation of symbols]

 1 Cooling roll 2 Crown

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Koichi Nishizawa 5-3 Tokai-cho, Tokai City, Aichi Prefecture Inside Nippon Steel Corporation Nagoya Works (72) Inventor Masaaki Mori 5-3 Tokai-cho, Tokai City, Aichi Prefecture Nippon Steel Corporation Nagoya Works

Claims (2)

[Claims] 1. A resin film is thermocompression-bonded to a metal strip while cooling a central portion of a laminating roll in the width direction by contacting a crown formed in a central portion of the cooling roll in a latitudinal direction. A method for producing a resin-coated metal strip. 2. A cooling roll for a laminating roll, wherein a crown is formed at the center in the roll width direction.