JPS5827114B2 - Method for manufacturing patterned heat transfer foil - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an extremely unique foil in which an appropriate pattern, that is, a pattern with blurred border lines or a pattern with clear border lines, appears within the foil that forms one character or figure. The present invention provides a method for producing a thermal transfer foil capable of thermally transferring.

Conventionally, a thermal transfer foil coating containing a mixture of thermoplastic resin, pigments, and other additives is applied onto a base sheet, and the surface of the thermal transfer foil coating is pressed onto the surface of the desired article with a heated metal plate of a desired shape to form the article. There are so-called thermal transfer foils that can thermally transfer a desired shape of foil onto a surface.

This conventional heat transfer foil includes glossy type, semi-gloss type,
There are matte types, but all of them are patternless and single-colored.

In recent years, thermal transfer foils have been used in a wide range of applications, including the binding of books, notebooks, notebooks, etc., marking on business cards, postcards, and other cards, and decoration of the surfaces of plastic articles.

However, as mentioned above, the types of conventional heat transfer foils are limited to those with no pattern and a single color, and their decorative effects are limited. is difficult to say.

If thermal transfer foil could be used to thermally transfer not only single-colored foils, but also foils with multicolored patterns, the decorativeness of the transferred articles would be further improved, and this would further contribute to increasing the added value of the articles. I think it's possible.

The present invention has been made in view of the current state of thermal transfer foils as described above, and as a result of extensive research, we have completed a method for manufacturing thermal transfer foils that can thermally transfer foils with various patterns.

The present invention provides a method for manufacturing a thermal transfer foil in which a coating surface of a thermal transfer foil made of a mixture of a thermoplastic resin, a pigment, and other additives is applied onto a base sheet and dried to form a film. After coating f'1 (B), which uses a synthetic resin as a vehicle that can dissolve or swell in the solvent of coating f'1 (A), is applied in a pattern, a coating material is further applied over the entire surface, or, ■ After applying a patterned film consisting of a coated rice q whose vehicle is a synthetic resin that does not dissolve or swell in the solvent of the paint (4) but can adhere to the film made of the paint (A), the entire surface is coated with a coat 11. By applying (A), a very unique thermal transfer foil with a pattern is provided.

That is, the present invention adopts a double layer structure in forming a thermal transfer foil layer on a base sheet, and in applying it, the first layer is applied in a pattern, and the second layer is applied over the entire surface. It is something.

In addition, the paint used to form the patterned first layer is used as coating material) and Coating $1 (C), and the coating used to form the second layer applied to the entire surface is used as coating material, which is dissolved or dissolved in the solvent of Coating 11 (A). The first invention is to use a paint prepared using a swellable synthetic resin as a vehicle as a paint (in the paint), and a synthetic resin that does not dissolve or swell in the solvent of the coating (HA) but can adhere to the paint (8). The second invention is to use a paint prepared using as a vehicle as a paint (C).

Both the first and second inventions aim to form a patterned foil, but the difference is that the first invention produces a blurred pattern and the second invention produces a sharp pattern. It is something.

First, in the first invention, the patterned first layer made of paint (B) on the base sheet is made of paint f'4 (A) at the time when paint (A) is applied to the entire surface of the first layer. By infiltrating into the second layer, the pattern formed by Paint QB) appears in the film formed by Paint (4), with its boundary lines blurred.

By the way, coating f'1 (A), which is the second layer, can be applied either when the first layer is undried or when it is dry, but especially when it is applied when it is dry, The penetration of the patterned first layer into the second layer made of paint (4), which is prohibited in (B), increases over time when the second layer is in a wet state. ) The extent to which the border lines of the pattern bleed changes depending on the length of the wet period from application to drying.

In other words, if this wetting time is too short, the border line of the pattern made of paint will not bleed sufficiently.
A desirable blurred pattern cannot be obtained.

In addition, when applying the second layer of paint (A) while the patterned first layer consisting of paint*g) is not dry,
I. On the other hand, if the wetting time is not long, the border line of the pattern created by paint (B) will bleed severely, and a desirable shading pattern will not be obtained.

As a result of various experiments, the present inventor has found that when applying the second layer when the first layer is dry, the wetting time of the second layer is 10 to 100.
It has been found that it is preferable to set the drying time to 10 seconds, and when applying the second layer while the first layer is not dry, it is preferable to dry it immediately after coating 1t(A).

Next, the second invention is to apply a second layer film made of paint particles to the entire surface of the patterned first layer film that is removed from the paint q, and to bond and integrate the first and second layer films. The second consisting of prisoners
The coating is applied to the layer film to create a pattern with sharp boundaries.

Therefore, in order to achieve the objective of the second invention, the synthetic resin that is the vehicle for paint (Q) must not be soluble in the solvent of paint N, but it must not dissolve in the solvent of paint (RQ). It must be able to adhere to the paint N film.

As explained in detail above, in the present invention, the paint (
The combination of 4) with paint (B) and paint q is important;
The combination must be determined with the most important consideration being the solubility or swelling property of the paint (4) in the solvent and the vehicle of paint (B) and paint 0.

In other words, the type of solvent in the paint, coating It(B), and coating 24.
(The types of vehicles in C1 are paint (4) and paint (B).
and paint (which forms the basis of the combination with Q).

Examples of this combination are shown in the table below.

The patterned first layer coated with paint (B) or coat t-+q on the base sheet may be regular or irregular, but the coat f'1 (A) applied thereon may be regular or irregular. It is preferable that it be in the second layer.

Further, as a method for applying the coating, a general method such as a gravure coating method is usually used.

Next, the second layer of paint N is applied over the entire surface, but it does not necessarily have to be a single color over the entire surface.
Depending on the application method, it may be in the form of, for example, multicolored stripes.

Note that the base sheet used in the present invention may be one that has good thermal conductivity and peelability of the thermal transfer film when suppressed by a heated metal plate in a thermal transfer operation, and is generally used for ordinary thermal transfer foils. Use plastic film.

Furthermore, prior to the formation of the thermal transfer film on the base sheet, the base sheet may be subjected to treatments such as applying a matting agent, embossing, rubbing, etc. to give the base sheet irregularities, if necessary. It is.

Furthermore, it goes without saying that when preparing Coating NA), Coating QB) and Coating q, desired additives can be added as long as they do not impair the properties of the thermal transfer foil.

Hereinafter, the present invention will be explained in more detail by citing specific examples.

Example 1 paint prisoner titanium oxide Neogen 30 Polyacrylic acid ester polymer barium stearate ethyl cellulose D, O, P.

xylene 100 parts by weight 1 〃〃〃 3 0 // // // // 4 〃〃〃 2 ／／／ノ 〃 0, 5 Horn // // 2 0 0 /I // // Paint B) Polyacrylic acid ester polymer Coloring dye* D. 0,P.

Xylene 5 Parts by weight 0, 2 // // // // 00 1 + - BASF Zapon LK apon apon E ast The above thermal transfer foil layer MA) (B) was prepared, and a gravure roll with a large dot-shaped pattern engraved ( 140 mesh) to a polyester film (15μ) with a dry thickness of 3μ.
Print paint B) (coloring dye, paint colored with green, red, black, etc.) so that
The solvent was volatilized at 30°C for 2 minutes.

Next, apply Coating $1 (A) evenly over the entire surface with a roll coater to a dry thickness of 15 μm, and leave it for 20 seconds.
Simultaneously with the start of partial dissolution or swelling, the solvent was heated at 130° C. for 3 minutes to volatilize the solvent to obtain a thermal transfer foil.

Next, the obtained thermal transfer foil was superimposed on the black book cover surface, and stamping was performed at 120° C. for 0.2 seconds using an automatic foil stamping machine to obtain foil on the book cover surface.

The foil thus obtained was smooth and had a rainbow-like, graceful appearance with a multicolored pattern appearing within the foil.

Example 2 Paint (4) Titanium oxide ioo parts by weight Neogen 3 0 l tt // //
Polyacrylic acid ester heavy 2 5 tt //
tt polymer calcium tearate 5〃〃〃D. 0.
P.

xylene 1 〃〃〃 3 Q Q // // // // Paint B) D. 0,P.

Xylene polyacrylic acid ester 2.5 weight polymer coloring dye (red) Q, 5 u t
Tuo, 5 /l Horn Hornl Q Q // // // // The heat transfer foil paints (A) and (B) with the above formulations were prepared, and a gravure film was prepared with a cloud-shaped pattern engraved on a base sheet (polyester film 15μ). Using a roll (180 mesh), print the paint (B) to a dry thickness of 1 to 2μ, then immediately apply the paint (4) evenly over the entire surface using a reverse roll coater to a dry thickness of 13μ. Apply about 5
After a few seconds, the solvent was volatilized at 130° C. for 3 minutes to obtain a thermal transfer foil.

Next, the obtained thermal transfer foil is superimposed on the black book cover surface, and stamping (thermal transfer operation) is performed at 140°C for 0.2 seconds using an automatic foil stamping machine, giving the book cover a soft pastel appearance. Foil provided.

Example 3 Paint (4) titanium oxide Neogen 30 Polyacrylic acid ester polymer barium stearate ethyl cellulose D. O. P.

Xylene 100 Parts by weight l 〃〃〃 3 Q // // // // 4 〃〃〃 2 // // /1 0, 5〃〃〃 2 Q Q // // // // Paint Nitrocellulose 5 Parts by weight Red pigment
2.5 Ethyl acetate
95 〃〃〃Thermal transfer foil layer I with the above formulation
f (AXB) was prepared, and using a gravure roll (12o mesh) with a pattern of Chiaki the deer engraved on the base sheet (polyester film 15μ), a coating RQ was printed to a dry thickness of 5μ, and the film was heated at 130℃2. The solvent was allowed to evaporate for a minute.

Next, using a reverse roll coater, paint (4) was applied uniformly over the entire surface to a dry thickness of 15 μm, and the solvent was volatilized at 140° C. for 3 minutes to obtain a thermal transfer foil.

Next, the heat transfer foil obtained above was superimposed on the brown notebook cover surface, and this was stamped at 120'C using an automatic foil stamping machine.
By performing a tamping operation (thermal transfer operation) for 0.2 seconds, a very unique foil with a smooth pique pattern could be applied to the notebook cover.

Claims (1)

[Claims] 1. In a method for manufacturing a thermal transfer foil, in which a thermal transfer foil layer 1t (A) made of a mixture of a thermoplastic resin, a pigment, and other additives is coated on a base sheet and dried to form a film, a coating MA ) A patterned coating characterized by applying coating f'1 (B), which uses a synthetic resin as a vehicle that can be dissolved or swelled in a solvent, in a pattern, and then coating the entire surface with coating (4). Method of manufacturing thermal transfer foil.