JPS6044143B2 - Method for manufacturing a laminate made of aluminum foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminate made by laminating aluminum foil, and includes laminating a vinyl chloride sheet 2 on the lower surface of an annealed soft aluminum foil 1 and a clear layer 3 on the upper surface. A method for manufacturing a laminate in which aluminum foil is laminated, which comprises forming a film 4, laminating the vinyl chloride sheet 2 on the lower surface of the laminating film 4 on a heated steel plate 5, and rapidly cooling immediately after lamination. It is.

The purpose of the present invention is to produce a laminate in which the aluminum foil does not wrinkle when a lamination film is laminated on a steel plate, and the aluminum foil does not crack when subjected to bending. It is an object of the present invention to provide a method for manufacturing a laminate plate made of aluminum foils that can be manufactured by laminating aluminum foils.

The present invention will be explained in detail below with reference to Examples.

FIG. 1 shows a schematic diagram of an apparatus used in the manufacturing method of the present invention. A primer 6 is applied to the surface of the steel plate 5 supplied in the direction of the arrow in FIG.
A laminating film 4 is layered and bonded onto the heated steel plate 5. Here, the laminating film 4 is made by laminating a vinyl chloride sheet 2 on the lower surface of the aluminum foil 1 via an adhesive 8, and laminating a transparent acrylic film on the upper surface of the aluminum foil 1 via an adhesive 9 to form a clear layer 3. was formed. Note that a transparent acrylic coating film may be directly formed on the upper surface side of the aluminum foil 1. The laminating film 4 superimposed on the heated steel plate 5 is laminated with the lower surface of the vinyl chloride sheet 2 onto the primer layer 6 by the pressure roller 11, and immediately thereafter transferred to the quenching device A.
It is then rapidly cooled down. The reason for rapid cooling after lamination is as follows. In other words, during lamination, the temperature of the steel plate 5 is 180°C to 220°C, but on the other hand, the laminating film 4 is at room temperature. When the aluminum foil 1 is heated, the thermal expansion coefficient between the steel plate 5 and the aluminum foil 1 changes. Because of the difference in temperature, if the aluminum foil 1 is laminated at a high temperature and then cooled after a while, wrinkles will appear on the surface of the aluminum foil 1.However, if the aluminum foil 1 is rapidly cooled immediately after lamination, the aluminum foil 1 will be heated by the heated steel plate 5. The steel plate 5 is cooled without being heated, and the aluminum foil 1 and the steel plate 5 are laminated in a cooled state (that is, at room temperature), and no wrinkles occur on the surface of the aluminum foil 1. The obtained laminate B is processed by bending, pressing, etc. to make it into a product, which is used, for example, as a reflector of a solar water heater or an interior equipment member such as a curtain rail.Next, the Hori invention, one example, and comparative example 1 and 2 are shown.

〔Example〕

The surface is galvanized 10 and chemical conversion treatment 1 is applied on top of it.
Apply a primer to the material treated with step 1 and heat it in the open to reach a temperature of 180°C to 220°C.
10μ thick on top of μ annealed aluminum foil
A laminating film was laminated with an acrylic coat of 100 μm, and a hard vinyl chloride sheet with a thickness of 100 μm was laminated on the lower surface of the aluminum foil, and immediately thereafter, the laminated film was rapidly cooled to obtain a laminate according to the present invention.

[Comparative Example 1] Comparative Example 1 was obtained by laminating a 100 μm thick annealed aluminum foil on a steel plate via a 50 μm thick hot melt type adhesive sheet.

[Comparative Example 2] Coating a primer on a copper plate and heating it to 180 C ~ 2
On top of 20C, laminated a lamination film consisting of a 10μ thick acrylic coat layered on the top surface of a 100μ thick hard aluminum foil, and a 100μ thick hard vinyl chloride sheet layered on the bottom surface of the aluminum foil. Immediately thereafter, it was cooled to obtain Comparative Example 2.

○Here, when the workability of the examples of the present invention, Comparative Example 1, and Comparative Example 2 was tested, the results were as shown in Table 1 below.

As is clear from Table 1 above, the products obtained by the method of the present invention were found to be excellent in processability.

As described above, in the present invention, a vinyl chloride sheet is laminated on the lower surface of an annealed soft aluminum foil and a clear layer is laminated on the upper surface to form a laminating film, and the lower surface of the laminated film is chlorinated on a heated steel plate. Since the vinyl sheets are laminated and rapidly cooled immediately after lamination, the steel plate is rapidly cooled just before the aluminum foil is heated by the steel plate during lamination, and the aluminum foil is not heated. As a result, both the aluminum foil and the steel plate are heated. Compared to laminating aluminum foil at high temperature and then cooling it, wrinkles do not occur due to the difference in thermal expansion coefficient between the two, and the surface of the aluminum foil can maintain a smooth surface, making it suitable for use as a reflector for solar water heaters, etc. There is no problem when using the aluminum foil, and since the aluminum foil is annealed and a vinyl chloride sheet is laminated on the bottom surface as a backing layer, the workability of the laminate is improved and it does not bend or press. , the aluminum foil does not crack even when subjected to impact, and the surface of the aluminum foil can be kept smooth at any time.
This makes it ideal for use as a reflector, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an apparatus used in the present invention, and FIG. 2 is a sectional view of an embodiment of the present invention, in which 1 is an aluminum foil, 2
3 is a vinyl chloride sheet, 3 is a clear layer, 4 is a lamination film, and 5 is a steel plate.

Claims (1)

[Claims] 1. Laminate a vinyl chloride sheet on the bottom surface of annealed soft aluminum foil and a clear layer on the top surface to form a lamination film. Laminate the vinyl chloride sheet on the bottom surface of the lamination film on a heated steel plate, and immediately after lamination. A method for producing a laminate made of aluminum foil, which is characterized by rapid cooling.