JP3046633B2 - Transfer foil - Google Patents

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 ionomer resin as an outer skin.

[0002]

2. Description of the Related Art Conventional transfer foils for golf balls include:
As shown in JP-B-63-44558, NC (nitrocellulose) /
There has been a method of providing desired characters using an alkyd-based ink. However, in this method, there is not much difference between the peel strength of the NC / alkyd-based ink from the polypropylene film and the adhesive strength of the NC / alkyd-based ink to a golf ball, and disadvantages such as partial chipping during transfer are caused. Had. Further, there is also a basic problem that the adhesion of the NC / alkyd-based ink itself to the ionomer resin is not so strong, and there is a problem that a surface treatment such as sandblasting is required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the drawbacks of the prior art as described above, and does not cause a part of characters or the like to be chipped at the time of transfer. The present invention provides a golf ball transfer foil that does not require a surface treatment.

[0004]

Means for Solving the Problems The present invention has solved the above problems, and has the following features:
100 weight base agent composed of cellulose derivative and polyamide
The amount unit, a chlorinated polyolefin resin of 0.5 to 2.0-fold
A transfer foil for a golf ball, wherein characters, pictures, and the like are printed with ink added in an amount .

In the polypropylene film of the present invention, the biaxially stretched film (OPP film) has a higher tensile strength than the non-stretched film (CPP), so that it is easy to handle, has good workability, and has high register accuracy. Good.

The thickness is generally 20 to 60 μm, but the thickness of 20 μm is good from the viewpoint of transferability to the surface of a golf ball (hereinafter, dimple).

In order to further reduce the peeling force, it is possible to use an untreated film which is not subjected to a corona discharge treatment. However, there is a problem that the peeling force is excessively reduced and the ink easily falls off.

As a binder for the ink, a resin mainly composed of a cellulose derivative and a polyamide was excellent in terms of peel strength from a polypropylene film and adhesion to an ionomer resin.

The cellulose derivative has a role of improving the releasability from the polypropylene film, and acetylcellulose, ethylcellulose and nitrocellulose are often used, but are not particularly limited to these resins.

[0010] Polyamides improve the adhesion to ionomer resins, but excessive blending impairs the releasability from polypropylene films.

Experiments have shown that a suitable formulation ranged from nitrocellulose / polyamide = 50/50 to 70/30.

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

This problem was remarkably improved by adding 0.5 to 2.0 parts by weight of chlorinated polyolefin to 100 parts by weight of the main agent (cellulose derivative + polyamide).

As described above, the main component 1 comprising a cellulose derivative and a polyamide is formed on the surface of a polypropylene film.
00 parts by weight, 0.5 to chlorinated polyolefin resin
By printing characters or figures such as Te 2.0 parts by weight of the added ink, it has become possible to obtain a transfer foil for a golf ball having excellent transferability.

[0015]

With the conventional method, it is difficult to adjust the balance between the peeling force from the polypropylene film and the adhesive force to the ionomer resin, and therefore, good transferability cannot be obtained.

In the present invention, it is possible to obtain a good transfer property by an appropriate mixing ratio of the cellulose derivative, the polyamide and the chlorinated polyolefin resin.

That is, by using polypropylene for the base film, an excessive peeling force can be obtained,
Further, the transferability to the concave portions (dimples) on the golf ball surface was improved.

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

When the amount of the cellulose derivative is small (when the amount of the polyamide is large), the peel strength from the polypropylene film is too heavy and the film is not peeled off. The strength is reduced and transfer is not performed well, or even if transfer is performed, the adhesion becomes extremely weak.

Further, chlorinated polyolefin is used as a base material (cellulose derivative + polyamide) in an amount of 0.1 part by weight based on 100 parts by weight .
By adding 5 to 2.0 parts by weight, adhesion to the surface of the ionomer resin that has not been subjected to surface treatment such as sandblasting has also become possible.

[0021]

EXAMPLE An ink using a resin having the following composition as a binder, nitrocellulose 60 parts by weight , polyamide 40 parts by weight , and chlorinated polypropylene 1 part by weight was prepared on the surface of a polypropylene film having a thickness of 20 μm. And a mark were printed to obtain a transfer foil.

When this transfer foil was transferred under a transfer condition of 130 ° C. for 1 second, a peeling strength was low, and a golf ball transferred to the details of the dimple was obtained.

[0023]

(Effects) The present invention is configured as described above. (1) Since the peel strength is low and the adhesive strength is high, transferability is excellent. (2) Adhesion to ionomer resin surface not subjected to surface treatment such as sandblasting is also possible. (3) If a biaxially stretched film (0PP film) polypropylene is used, it is easy to handle and has good workability because of high tensile strength. (4) Use of a 20μ polypropylene film provides excellent transferability of concave portions (dimples) on the golf ball surface. This has the effect.

Claims (2)

(57) [Claims] 1. A cellulose film is coated on the surface of a polypropylene film.
DerivativesWhenPolyamide100 parts by weight of a main ingredient consisting of
Chlorinated polyolefin resin, 0.5 to 2.0weightDepartment
Characterized by printing letters and pictures with added ink
Transfer foil. 2. The transfer foil according to claim 1, wherein an untreated film not subjected to corona discharge treatment is used as the polypropylene film.