JPH04296588A - Transfer foil - Google Patents

Abstract

PURPOSE:To provide a transfer foil for a golf ball which is for the purpose of printing a required character, a pattern, etc., on the golf ball, wherein the golf ball having ionomer resin on an outer skin, does not generate breaking off in a portion of the character or the like in transferring or does not need surface treatment such as sand blasting or the like. CONSTITUTION:A transfer foil is obtained wherein a character and a pattern are printed on a surface of a polypropylene film with ink in which 0.2-2.0 parts polyolefine chloride resin is added to resin having cellulose derivative and polyamide as main components.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf ball, and more particularly to a transfer foil for a golf ball having an outer skin coated with an ionomer resin.

0002

[Prior Art] Conventional transfer foils for golf balls include:
As shown in Japanese Patent Publication No. 63-44558, NC (nitrocellulose)/
There was a method of creating desired characters using alkyd ink. However, with this method, there is not much difference in the peel strength of the NC/alkyd-based ink from the polypropylene film and the adhesion strength of the NC/alkyd-based ink to the golf ball, and there are drawbacks such as part of the characters being chipped during transfer. had. Furthermore, there is a fundamental problem in that the adhesion of the NC/alkyd ink itself to the ionomer resin is not very strong, and there is a problem in that surface treatment such as sandblasting is required.

0003

[Problems to be Solved by the Invention] The present invention is intended to solve the drawbacks of the prior art as described above. The present invention provides a transfer foil for golf balls that does not require surface treatment.

0004

[Means for Solving the Problems] The present invention solves the above-mentioned problems by coating the surface of a polypropylene film with a resin mainly composed of cellulose derivatives and polyamides, and a chlorinated polyolefin resin. 5~2. This is a transfer foil for golf balls, characterized in that characters, patterns, etc. are printed using 0 parts of added ink.

[0005] The polypropylene film used in the present invention is a biaxially stretched film (OPP film) which has higher tensile strength than an unstretched film (CPP), so it is easy to handle and has good workability, and also has good registration accuracy. In good condition.

The thickness is generally 20 to 60 μm, but a thickness of 20 μm is good in terms of transferability to the surface of a golf ball (hereinafter referred to as dimples).

In order to further reduce the peeling force, it is also possible to use an untreated film that has not been subjected to corona discharge treatment. However, it has the disadvantage that the peeling force decreases excessively and the ink easily falls off, so it is necessary to use them appropriately.

As the binder for the ink, resins mainly composed of cellulose derivatives and polyamides have been found to be excellent in terms of peel strength from polypropylene films and adhesion to ionomer resins.

[0009] The cellulose derivative has the role of improving the peelability from the polypropylene film, and acetyl cellulose, ethyl cellulose, and nitrocellulose are often used, but the resin is not limited to these resins.

Although polyamide improves adhesion to ionomer resins, excessive blending impairs releasability from polypropylene films.

Experiments have shown that a suitable blend is in the range of nitrocellulose/polyamide from 50/50 to 70/30.

However, this alone does not provide sufficient adhesion to the ionomer resin. In particular, adhesion is insufficient when surface treatment such as sandblasting is not performed.

[0013] This problem occurs when chlorinated polyolefin is used as the main agent (
0.5 to 2 for cellulose derivative + polyamide)
．． Adhesion was significantly improved by adding 0 parts by weight.

As described above, by printing letters, patterns, etc. on the surface of non-polyamide using ink made by adding 0.5 to 2.0 parts by weight of chlorinated polyolefin resin to resin mainly composed of cellulose derivatives and polyamide. It became possible to obtain a transfer foil for golf balls with excellent transferability.

[0015]

[Function] In the conventional method, it was difficult to adjust the balance between the peeling force from the polypropylene film and the adhesion force to the ionomer resin, and therefore good transferability could not be obtained.

[0016] In the present invention, it is possible to obtain good transferability by appropriately blending the cellulose derivative, polyamide, and chlorinated polyolefin resin.

[0017] That is, by using polypropylene for the base film, excessive peeling force can be obtained,
Furthermore, the transferability to the dimples on the surface of the golf ball was improved.

As a binder for the ink, the cellulose derivative serves to reduce the peel strength from the polypropylene film, and the polyamide serves to improve the adhesion to the ionomer resin, and the blend is in the range of nitrocellulose/polyamide = 50/50 to 70/30. is appropriate.

If the amount of cellulose derivative is small (if the amount of polyamide is large), the peel strength from the polypropylene film will be too high and it will not be peeled off properly, and if the amount of polyamide is small (if the amount of cellulose derivative is large), the peel strength will be light but the adhesion to the ionomer resin will be poor. The strength decreases and the transfer is not successful, or even if the transfer is successful, the adhesion is extremely weak.

Furthermore, by adding 0.5 to 2.0 parts by weight of chlorinated polyolefin to the base material (cellulose derivative + polyamide), it is possible to adhere to the ionomer resin surface that has not been subjected to surface treatment such as sandblasting. Ta.

[0021]

[Example] Ink and nitrocellulose with the following composition of resin as a binder were applied to the surface of a 20μ thick polyamide film.
60 parts polyamide
40 parts chlorinated polypropylene
One copy was made, and the product name and mark of the golf ball were printed on it, and it was used as a transfer foil.

[0022] When this transfer foil was transferred under transfer conditions of 130°C and 1 second, a golf ball with light peel strength and in which even the details of the dimples were transferred was obtained.

[0023]

[Effects] The present invention has the above structure, and (1) has excellent transferability due to its light peel strength and high adhesive strength. (2) It is also possible to adhere to ionomer resin surfaces that have not been subjected to surface treatments such as sandblasting. (3) Biaxially stretched film (0PP film) If polypropylene is used, it has high tensile strength, so it is easy to handle and has good workability. (4) The use of a 20μ polypropylene film provides excellent transferability of dimples on the surface of a golf ball. It has this effect.

Claims (2)

[Claims] Claim 1: On the surface of a polypropylene film, 0.0% of a chlorinated polyolefin resin is applied to a resin mainly composed of cellulose derivatives and polyamides. 5~2. A transfer foil characterized in that characters, patterns, etc. are printed using ink containing 0 parts. 2. The transfer foil according to claim 1, wherein the polypropylene film is an untreated film that does not undergo corona discharge.