JPS6344558B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a transfer foil, and particularly to a transfer foil for golf balls. Conventional methods for painting golf balls include direct printing using tacho printing, or using a solid printing foil with a solid ink layer formed on the entire surface of the foil and pressing it with a heated stamp from the back side. A method of transferring an arbitrary pattern, and a thermal transfer printing method of printing using a transfer foil with a transfer ink layer of an arbitrary pattern formed on an arbitrary film, as disclosed in Japanese Patent Application Laid-Open No. 53-63137. It has been known. However, when applying multicolor patterns to golf balls, the tacho printing method requires curing the ink for each color, which is extremely inefficient, and the method using solid printing foil requires special stamping equipment for multicolors. Moreover, since most of the ink printed on the solid printing foil is discarded without being used, it has disadvantages such as high cost. Furthermore, Tokukai Akira
The transfer foil disclosed in Japanese Patent No. 53-63137 also has the following drawbacks. That is, when screen printing is used to form arbitrary patterns on a film, the ink dries slowly, which tends to cause problems such as blocking, and the printing method itself is inefficient, making transfer foil expensive. Furthermore, when the gravure printing method is used, the outline of the ink layer is not sharp and a so-called "swimming" phenomenon is observed, making it unsatisfactory as a transfer foil. Furthermore, many of these conventional transfer foils require release varnish to be applied on the film to improve transferability.
After printing an arbitrary pattern on this, the structure is such that adhesive varnish is applied or either release varnish or adhesive varnish is used, so in transfer foils with such a structure, the release varnish is the top coat and the ink layer. This has disadvantages such as inhibiting adhesion with the mold, causing burrs on the release varnish and adhesive varnish, and yellowing of the adhesive varnish, making selection of materials extremely difficult and increasing man-hours and materials. Therefore, it has the disadvantage of high cost. Moreover, when such a transfer foil is used for transfer, the transfer performance is extremely poor when the paint applied to the surface of the golf ball, which is the object to be transferred, has progressed to hardening. It is difficult to select the material and shape of the silicone pad to apply pressure from the back side, and in order to ensure that the ink layer is sufficiently fixed to the golf ball, high temperature,
If pressed for a long time, the golf ball's outer skin may become distorted. As a result of intensive research to improve the drawbacks of the conventional method described above, the inventors of the present invention have developed a method that can transfer elaborate designs in multiple colors in a single hot stamping process, and has given due consideration to the physical properties so that it can withstand harsh usage conditions. This led to the successful development of a transfer foil, which led to the completion of the present invention. The golf ball transfer foil of the present invention has an ink layer formed on a polypropylene film without using a release varnish or adhesive, and has particularly good release and transfer properties, and has sufficient necessary physical properties. It is characterized by using an ink composition provided in the above. That is, the present invention uses an ink containing nitrified cotton or alkyd resin as the main resin, a pigment or dye as a coloring agent, and polyethylene powder, a plasticizer, and a surfactant as additives dissolved or dispersed in an organic solvent. This is a transfer foil for golf balls, on which a desired ink layer is formed. The film that is the carrier for the ink layer used in the present invention does not just support the ink layer;
Characteristics that allow the ink layer to be completely transferred even to a unique site such as the dimple portion of a golf ball, and characteristics that allow the ink layer formed by the special ink composition described below to be completely released during transfer. must be equipped. According to the results of tests conducted on polyethylene film, polypropylene film, polyester film, polyamide film, vinyl chloride film, and cellophane film as films that meet the above conditions, polypropylene film showed the best results. This result is very interesting in view of the fact that polyester films and cellophane films are actually commonly used in this field. The ink used in the present invention contains nitrified cotton and alkyd resin as the main resin components, and when the ink layer is transferred by heat and pressure, the main resin components soften and provide tackiness to the golf ball, which is the object to be transferred. It has the ability to adhere to surfaces. The pigment used as a coloring agent, that is, a coloring agent, is required to have light resistance since the golf ball, which is the object to be transferred, is used outdoors, so a high grade pigment is used. For example, dyes can also be used. The polyethylene powder as an additive was added to prevent blocking of the ink layer and improve the abrasion resistance, and the plasticizer was used because the main resin is relatively hard and was transferred to the golf ball, which is the object to be transferred. Since the ink layer tends to crack due to strong impact when hitting a ball, it is added to prevent cracks. Furthermore, a surfactant is added as a dispersant for uniformly dispersing insoluble substances such as pigments and polyethylene powder in an organic solvent. Because the transfer foil for golf balls of the present invention has the above-described structure, it not only has superior transfer performance to the transferred object including dimpled portions, but also has superior transfer performance to the transferred ink, compared to conventional transfer foils. Lightfastness of the layer,
Since it also has excellent physical properties such as abrasion resistance and crack resistance, it is truly suitable as a transfer foil for golf balls that are exposed to strong light and impact. The present invention will be explained in more detail below with reference to Examples. Example 1 [Creation of transfer foil] A transfer foil was created by printing a pattern on a 20μ biaxially stretched polypropylene film by gravure printing using the following ink compositions (1) to (6). did. (1) Ink (1) Nitrified cotton 20 parts by weight, alkyd resin 5 parts by weight,
10 parts by weight of carbon black (pigment), a trace amount of less than 1 part by weight of polyethylene powder, a trace amount of less than 1 part by weight of plasticizer (phthalic acid type), a trace amount of less than 1 part by weight of surfactant (nonionic type), a trace amount of less than 1 part by weight of a mixed solvent (acetic acid) Ethyl/methyl alcohol/toluene = 6/
3/1) 65 parts by weight (2) Ink (2) 18 parts by weight of nitrified cotton, 5 parts by weight of alkyd resin,
Polyazo pigment (CINo Pigment Red 144)
12 parts by weight, a trace amount of less than 1 part by weight of polyethylene powder, a trace amount of less than 1 part by weight of a plasticizer (phthalic acid type), a trace amount of less than 1 part by weight of a surfactant (nonionic type), a trace amount of less than 1 part by weight of a mixed solvent (ethyl acetate/methyl alcohol/ Toluene = 6/3/1) 65 parts by weight (3) Ink (3) 20 parts by weight of nitrified cotton, 5 parts by weight of alkyd resin,
10 parts by weight of dye (CINo Disperse BIue 19),
A trace amount of less than 1 part by weight of polyethylene powder, a trace amount of less than 1 part by weight of a plasticizer (phthalic acid type), a trace amount of less than 1 part by weight of a surfactant (nonionic type), a mixed solvent (ethyl acetate/methanol/toluene = 6/
3/1) 65 parts by weight (4) Ink (4) 18 parts by weight of nitrified cotton, 5 parts by weight of alkyd resin,
CINo Disperse Red 60...12 parts by weight, trace amounts of polyethylene powder (1 part by weight or less), plasticizers (phthalic acid) in trace amounts of 1 part by weight or less, surfactants (nonionic) in trace amounts of 1 part by weight or less, mixed solvent (acetic acid) Ethyl/methanol/toluene = 6/3/
1) 65 parts by weight (5) Ink (5) 25 parts by weight of nitrified cotton, 10 parts by weight of carbon black, a trace amount of less than 1 part by weight of polyethylene powder, a trace amount of less than 1 part by weight of plasticizer (phthalic acid), surfactant (Nonionic) Trace amount of 1 part by weight or less, mixed solvent (ethyl acetate/methanol/toluene =
6/3/1) 65 parts by weight (6) Ink (6) 15 parts by weight of nitrified cotton, 10 parts by weight of polyamide resin,
10 parts by weight of carbon black, a trace amount of less than 1 part by weight of polyethylene powder, 1 part of plasticizer (phthalic acid)
A trace amount of less than 1 part by weight of a surfactant, 65 parts by weight of a mixed solvent (ethyl acetate/methanol/toluene = 6/3/1) Example 2 White color on a golf ball whose outer skin is mainly made of balata A urethane paint (two-component heat-dried golf ball urethane paint) was applied, dried and cured at 36°C for 20 hours, and then silicone rubber heated to 180°C (with a thickness of 3 mm and a surface radius of curvature of 40 mm) was applied. Transfer foil prepared using ink (1) was transferred by pressing for 1 second using a cylindrical concave surface. Next, a transparent urethane paint (a two-component heat-dried urethane paint for golf balls) was applied and dried and cured at 36°C for 48 hours to obtain a decorated golf ball. The following tests were conducted on the decorated golf balls. First, in order to confirm the transferability of the transfer foil, it was determined by visual observation whether the printed pattern, ie, the ink layer, was completely transferred to the golf ball. Furthermore, it was determined by visual observation whether the pattern transferred to the golf ball was beautifully transferred. Finally, to examine the physical properties of the design, we conducted impact tests and abrasion tests. In the impact test, the golf ball was held at 45m/
The impact resistance was determined by repeatedly colliding with a steel plate at a speed of 50 seconds, and then determining the degree of damage such as peeling of the pattern by visual observation.
In the abrasion test, the surface of the golf ball after the impact test was strongly sprayed with water and sand for 5 minutes, and the degree of damage such as peeling and abrasion of the pattern was then determined by visual observation. , wear resistance. The results are shown in Table 1. Example 3 The same procedure as Example 2 was carried out except that a transfer foil prepared using ink (2) was used. The results are shown in Table 1. Example 4 A test was carried out in the same manner as in Example 2, except that a golf ball whose outer shell was mainly made of ionomer resin was used. The results are shown in Table 1. Example 5 The same procedure as Example 4 was carried out except that a transfer foil prepared using ink (2) was used. The results are shown in Table 1. Example 6 White urethane paint applied to golf balls (two-component reaction heating drying type urethane paint for golf balls)
Example 4 was carried out in the same manner as in Example 4, except that the drying and curing time was 48 hours and the transfer foil pressure bonding time was 0.3 seconds.
The results are shown in Table 1. Example 7 The same procedure as Example 6 was carried out except that a transfer foil prepared using ink (2) was used. The results are shown in Table 1. Example 8 The same procedure as Example 2 was carried out except that a transfer foil prepared using ink (3) was used. The results are shown in Table 1. Example 9 The same procedure as Example 2 was carried out except that a transfer foil prepared using ink (4) was used. The results are shown in Table 1. Comparative Example 1 The same procedure as Example 2 was carried out except that a transfer foil prepared using ink (5) was used. The results are shown in Table 1. Comparative Example 2 The same procedure as in Example 2 was carried out except that a transfer foil prepared using ink (6) was used. The results are shown in Table 1. Comparative Example 3 The same procedure as in Example 4 was carried out, except that a conventional transfer foil for golf balls (produced by silk screen printing using an ink containing no nitrified cotton in the vehicle) was used. The results are shown in Table 1. Comparative Example 4 White urethane paint applied to golf balls (two-component reaction heat drying type urethane paint for golf balls)
Comparative Example 3 was carried out in the same manner as in Comparative Example 3, except that the drying and curing time was 48 hours and the pressure bonding time of the transfer foil was 1.0 seconds.
The results are shown in Table 1. Comparative Example 5 The same procedure as in Example 2 was carried out, except that a conventional transfer foil for golf balls (made by gravure printing with an ink containing no nitrified cotton in the vehicle) was used. The results are shown in Table 1. Comparative Example 6 The same procedure as in Example 4 was carried out, except that a conventional transfer foil for golf balls (produced by gravure printing with an ink containing no nitrified cotton in the vehicle) was used. The results are shown in Table 1.

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Claims (1)

[Claims] 1. A desired pattern can be applied onto a polypropylene film using an ink consisting of nitrified cotton/alkyd resin as the main resin, a pigment or dye as a coloring agent, and polyethylene powder, a plasticizer, and a surfactant as additives dissolved or dispersed in an organic solvent. A golf ball transfer foil comprising an ink layer.