JPS5933627B2 - Method of forming wear-resistant film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for improving the durability of the painted surface when coating the running surface of a medium such as a passbook in a passbook processing device used at a counter of a financial institution, etc. with acrylic urethane resin, etc. Regarding the method of forming an abrasion film, various devices have recently been developed and put into practical use as terminals for computer banking systems. Among them, passbook processing devices that can print passbooks and record journals during transactions such as deposits are widely used. ing.

This device inserts and ejects passbooks etc. through the insertion slot, so when painting the running surface, a wear-resistant paint is used to prevent wear on the painted surface on which the passbook runs. There is. For example, as shown in FIG.
The passbook 2 is inserted into the machine, and the passbook 2 is driven by the rotation of the pressure roller 3 and the feed roller 4. By the way, the conventional paint for the wear-resistant painted surface A of the travel path of this passbook 2 is as follows:
There are various types of epoxy resins, but acrylic urethane resin paints are excellent for wear resistance.

Acrylic urethane resin is a copolymer of polyacrylic acid ester and isocyanate. Acrylic urethane resin paint is a paint that has acrylic urethane resin as its main component and dries and hardens with a hardening agent, and has high hardness and excellent adhesion, weather resistance, chemical resistance, etc. However, even this paint could not withstand long-term use, especially at the fold line 5 of the passbook 2. Therefore, the abrasion-resistant painted surface A is worn out in a short period of time due to the protrusion of the crease 5, damaging its appearance.
Further, there is a problem that the surface of the passbook 2 may be damaged due to the roughness of the worn surface. Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a method for forming an abrasion-resistant film that can reduce wear on painted surfaces and prevent damage to bankbooks, etc. 4-6% by weight of glass fiber in acrylic urethane resin paint.
This is achieved by adding and stirring, and then applying the supernatant liquid as a paint.

An embodiment of the method for forming a wear-resistant film according to the present invention will be described below with reference to FIGS. 2 and 3.

Figure 2a is a cross-sectional view of the paint when it is stirred, b is a cross-sectional view of the paint in its supernatant liquid, and Figures 3a and b are graphs of the life characteristics of the travel path and passbook with respect to the amount of glass fiber mixed in. This is a graph when the paint extracted in the manner shown in FIG. 2b is used. In the figure, reference numeral 6 denotes a container, which is provided with a valve 7 for discharging the precipitated paint at the bottom thereof, and a valve 9 for collecting the paint from the supernatant liquid 8 on the right side.

10 is a wear-resistant paint, acrylic urethane resin 11
Glass fiber 12 is added to the mixture and stirred.

The method for forming this wear-resistant film is as shown in FIG. The glass fiber 12 is left to stand for about 30 minutes, at which time the glass fiber 12 begins to lie laterally to some extent as shown in FIG. 2b.

Thereafter, the valve 9 shown in FIG. Meanwhile, valve 7 is opened to drain the precipitate. This paint 10 is applied to the travel path from the passbook insertion slot 1 to form a coated surface of a wear-resistant film. Here, glass fiber 1
The reason why the amount of 2 added was set at 4 to 6% by weight (5% by weight in the example) is shown in Figure 3. To explain this with reference to FIG. 3 and b, FIG.
2, and the vertical axis shows the number of times the passbook 2 was run. FIG. 3b shows the degree of damage to the bankbook 2 during a 600,000-cycle test due to changes in the amount of glass fiber 12 added.

In the figure, the horizontal axis indicates the amount of glass fiber 12 added,
The vertical axis indicates the degree of damage to the bankbook surface. The data when the glass fiber 12 is 0% is the wear life according to the conventional method.

In other words, it wears out after about 70,000 cycles. In the case of the above embodiment, when the glass fiber 12 is 5%, it is possible to run approximately 600,000 times.

Therefore, the number of times the passbook 2 runs can be increased approximately 8 times compared to conventional acrylic urethane resin paint, and the running surface A
can maintain its beauty for a long time.

If a larger amount of glass fiber 12 is added, for example in excess of 6% by weight, the life will be extended and the number of runs will increase, but even if painted with supernatant liquid 10, the tips of the glass fibers 12 will protrude from the coating surface and will not run. The surface of Passbook 2 is damaged and cannot be adopted.

The same holds true even if the standing time after stirring is extended. Furthermore, if a small amount of glass fiber 12 is added, for example, less than 4% by weight, sufficient wear resistance cannot be obtained. The same holds true even if the standing time after stirring is shortened. In this way, a coating film that is wear-resistant and does not damage the surface of the passbook 2 can be formed by adding 4 to 6% by weight of the glass fiber 12.

On the other hand, the glass fiber 12 added to the paint generally has a length of 100 microns or less (see, for example, Japanese Patent Publication No. 50-25485).

In short, any material containing fibers having a length shorter than the thickness of the wear-resistant film formed on the painted surface may be used. for example,
This wear-resistant film has a thickness of 50μ.

At this time, if a stirred liquid of the acrylic urethane resin paint 11 and the glass fiber 12 is used (that is, a supernatant liquid is not used), long fibers of about 100 μm will be contained in the stirred liquid. In other words, there is a high probability that a glass fiber longer than the thickness of the wear-resistant film will protrude from the surface of the coating, making it impractical. Therefore, in this embodiment, a supernatant liquid 10 of a mixed liquid of paint and glass fiber is used. That is, long glass fibers are allowed to settle. As a result, the supernatant liquid contains most of the glass fibers having a diameter of 50 μm or less, which is shorter than the thickness of the coating surface to be formed. By applying this supernatant liquid as a paint, it is possible to reduce the probability that the glass fibers protrude from the coating surface, and it is possible to form a wear-resistant film through normal painting operations. According to the method for forming a wear-resistant film according to the present invention, by adding glass fiber to the acrylic urethane resin paint, the wear resistance of the medium running surface is improved, and the surface of the medium such as a bankbook is prevented from being damaged. It has the advantage that it does not occur.

[Brief explanation of the drawing]

FIG. 1a is a plan view showing the abrasion-resistant painted surface of the media running path of a conventional media feeding mechanism, b is a side view thereof, and FIG. 2a is an example of the method for forming an abrasion-resistant film of the present invention. Fig. 3 is a cross-sectional view of the abrasion-resistant paint immediately after stirring, and b is a cross-sectional view after it has been left for 30 minutes. , is a graph when the paint extracted in the manner shown in FIG. 2b is used.

Claims (1)

[Claims] 1. A method for forming an abrasion-resistant film in which a paint made of acrylic urethane resin is applied to the surface of an object to be painted, wherein the acrylic urethane resin paint contains glass containing fibers shorter than the thickness of the abrasion-resistant film to be formed. A method for forming an abrasion-resistant film, which comprises adding 4 to 6% by weight of fibers and stirring, and then applying the supernatant liquid as a paint to the surface of an object to be coated.