JPS6339436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot stamping film, a method for producing the same, and an apparatus suitable for carrying out the method.

It is often desirable to apply decorative patterns to hot stamping films. Generally this is accomplished by making a transfer corresponding to the pattern. However, when using this method, the range of patterns that can be obtained is limited.

It is also already known to obtain a decorative effect by roughening the surface of the carrier film adjacent to the lacquer coating, for example by brushing or other methods. According to this method, when a hot stamping film is attached to a suitable object and the carrier film is peeled off, the surface of the hot stamping film has a matte finish. However, with this method it is practically impossible to obtain special decorative effects in addition to a matte finish, or even if it is possible, it is very difficult.

Furthermore, it is already known, especially in connection with the production of hot stamping films with a wood grain pattern, to provide the surface with areas of different gloss, for example by printing a matte lacquer in a pattern corresponding to the wood grain pattern. There is. The lacquer, which usually produces a matte finish, remains on the carrier film when the carrier film is peeled from the lacquer coating layer that remains on the object to be decorated during transfer. This method has the disadvantage that printing is quite difficult unless provision is made in some way for precise registration of multiple prints (print registration), and the method requires a large amount of money to successfully perform. costs. Furthermore, the surface of the stamping film is no longer flat after the carrier film, which has a lacquer that creates a matte finish, is removed.

In order to overcome the above-mentioned difficulties in printing, proposals have also been made in the past to use special swelling agents to create matte finishes and to solve registration problems. However, this method has the disadvantage that the matte finished parts are not as resistant to mechanical stress. In particular, polishing the matte finish will at least partially destroy the decorative effect.

It has now been found that new hot-stamping films which have a unique decorative effect and which are particularly resistant to mechanical stress during use can be produced without significant outlay.

The hot stamping film described above was achieved by designing the hot stamping film so that the lacquer coating layer is transparent and a three-dimensional pattern is provided on the surface of the lacquer coating layer that is not on the carrier film side.

Accordingly, the present invention provides a hot stamping film comprising a carrier film, a transparent lacquer coating layer having a three-dimensional pattern on the side other than the carrier film, and an adhesive layer, which are layered in this order. . The carrier film may have a release layer on the surface facing the transparent lacquer coating layer, and the adhesive layer may have an adhesion promoting layer on the surface facing the three-dimensional pattern of the transparent lacquer coating layer. It may have.

Further, the present invention provides a roller having a transparent lacquer coating layer provided on the carrier film or on a release layer provided in advance on one side of the carrier film, and having a reverse pattern on the side of the transparent lacquer coating layer that is not on the carrier film side. The above-mentioned hot stamping of the present invention comprises forming a three-dimensional pattern by forming a three-dimensional pattern, and then providing an adhesive layer, or an adhesion promoting layer and an adhesive layer in this order, on the surface of the transparent lacquer coating layer on which the three-dimensional pattern is provided. A method for manufacturing a film is provided.

Furthermore, the present invention provides that the second printing roller is replaced by a calendar roller having an uneven surface for producing a three-dimensional pattern, or an additional calendar roller equipped with a pressure bonding device and having an uneven surface for producing a three-dimensional pattern is used as the second printing roller. The present invention provides an apparatus for use in producing the hot stamping film of the present invention by the above-described production method, comprising a multicolor printing press located immediately after one printing roller.

The present invention will be explained in detail below.

In the hot stamping film of the present invention, one side of the transparent lacquer coating adjacent to the carrier film and exposed during use prior to transfer is smooth, so that mechanical pressure is not a characteristic of the film. does not have a significant impact on
Instead, the other side of the transparent lacquer coating layer, which is not exposed and therefore not subjected to mechanical pressure, is coated with one side of the transparent lacquer coating layer that is exposed during the above-mentioned use due to the reflection or refraction of different lights. There is also a three-dimensional pattern that is deep enough to appear as if a pattern has been engraved on the surface. The three-dimensional pattern created on the inner surface of the transparent lacquer coating layer by the calender roller having an uneven surface may be any pattern. For example, it is also possible to provide a pattern known as a spin pattern using a thin metal plate or the like. This pattern consists of concentric grooves with sharp corners that are tightly adjacent to each other, giving the impression that the entire surface has been worked point by point with a rotating brush. Of course, other types of patterns can also be provided. For example, the three-dimensional pattern on the protected side of the transparent lacquer coating may be a wood grain. In this case, the brightness appears to be different due to the different reflection of light, so under certain conditions it is not necessary to use inks of different colors.

Particularly interesting visual effects are obtained when a metal layer of substantially constant thickness is applied to the textured side of the transparent lacquer coating. Preferably, this metal layer is vacuum deposited. The reflection effect at different angles is particularly pronounced when a metal layer is present.

In the production of the hot stamping film of the present invention, the three-dimensional pattern is formed between the surface of the transparent lacquer coating layer and the adhesive layer, or if the adhesive layer has an adhesion promoting layer, the three-dimensional pattern of the transparent lacquer coating layer is formed. It is possible to provide a pigmented layer between the bearing surface and the adhesion promoting layer. Such a method is suitable, for example, for producing hot stamping films with a wood grain pattern.

It has been found that the thickness of the transparent lacquer coating layer provided with the three-dimensional pattern should be between 1.5 and 3 microns. The depth of the three-dimensional pattern is approximately 1μ. If a metal layer is present, its depth is approximately 500 Å. If a pigment adhesive layer is provided instead of the metal layer, its thickness is preferably between 2 and 4 microns.

The three-dimensional pattern can be provided very easily if the transparent lacquer coating layer is formed by a lacquer that is thermoplastic at least during the three-dimensional pattern. Preferably, the lacquer forming the transparent lacquer coating layer is curable.

Various known methods are utilized to apply the various layers to the carrier film in the manufacture of the hot stamping films of the present invention. As described above, in the manufacturing method of the present invention, a desired three-dimensional pattern is formed on the surface of the transparent lacquer coating layer provided on the carrier film, which is not on the carrier film side, by using a roller having a reverse pattern in the step of forming unevenness. is provided. This step is carried out before the adhesive layer is applied and also before any pigmented or adhesion promoting layers are applied. The texturing step is easily incorporated into conventional hot stamping film manufacturing methods and does not add to the time required to manufacture the film.

According to the present invention, when producing a hot stamping film having a metal layer, the metal layer is first provided on the surface of the transparent lacquer coating layer, which is not a carrier film and has not yet been provided with a three-dimensional pattern, by a conventional method. Is possible. A three-dimensional pattern is then provided on the surface of the transparent lacquer coating layer that has this metal layer in the step of forming irregularities. Of course, such a method is only possible if the metal layer has sufficient elasticity. If this is not the case, this metal layer is preferably deposited on the already textured surface of the transparent lacquer coating.

In order to ensure that the three-dimensional pattern of the transparent lacquer coating does not disappear during the transfer of the hot stamping film onto a suitable object, the patterning roller is at least
It is preferred to use a lacquer which is heated at a temperature of 150°C, preferably at least 170°C, but below the decomposition temperature of the film.

The three-dimensional pattern can be very easily applied to a carrier film provided with a transparent lacquer coating, or a carrier film provided with a transparent lacquer coating and a metal layer, by calendering using rollers with a correspondingly textured surface. It will be done.

If a transparent lacquer covering layer and a pigmented layer are provided, the pigmented layer is preferably applied by known screen printing techniques.

It is contemplated that various types of equipment can be used to produce the hot stamping films of the present invention by the method described above. especially,
Special equipment can also be used to carry out the texturing process. However, from the point of view of manufacturing technology and considering the required time and equipment, it is possible that the second printing roller could be replaced by a calender roller with an uneven surface for creating the three-dimensional pattern, or alternatively, the second printing roller could be replaced by a calender roller with a textured surface for creating the three-dimensional pattern, or the second printing roller could be replaced by a calender roller with a pressure device to create the three-dimensional pattern. It is particularly preferred to use a multicolor printing press in which a calender roller with a textured surface for production is installed immediately after the first printing roller.

Next, the hot stamping film of the present invention will be explained with reference to FIGS. 1 and 2.

The hot stamping film shown in FIG. 1 has six layers:

1: Carrier film (19-23μ thick polyester film) 2: Known release layer approximately 0.1μ thick 3: Thermoplastic or cold-crosslinkable transparent lacquer coating approximately 1.5-2μ thick 4: Vapor deposition, e.g. electron beam evaporation 5. A known adhesion promoting layer approximately 0.3μ thick; 6. A known heat sealing layer or adhesive layer approximately 1.5μ to 2μ thick. As is clear from FIG. 1, a three-dimensional pattern 8 is provided on the surface 7 of the transparent lacquer coating layer 3 facing the metal layer 4. In the drawing, this three-dimensional pattern 8 is schematically depicted. As will be explained further below, this three-dimensional pattern 8 is created by corresponding calendering of the carrier film 1 provided with a transparent lacquer coating 3. After the three-dimensional pattern 8 is provided on the surface 7 of the transparent lacquer coating layer 3, the metal layer 4
is provided.

The hot stamping film shown in FIG. 2 has a pigmented layer in place of the metal layer 4 of the hot stamping film of FIG. This allows different visual effects to be obtained. Due to the presence of the pigmented layer, there is no need for an adhesion promoting layer to aid in the adhesion of the heat sealing layer. For details,
The hot stamping film of FIG. 2 has the following layers.

11: Carrier film (19-23μ thick polyester film) 12: Known release layer approximately 0.1μ thick 13: Thermoplastic or cold-crosslinkable transparent lacquer coating layer approximately 1.5-2μ thick 14: Approximately 2.5-3μ thick Pigment colored layer 15: 1.5 to 2 μm thick known heat-sealing layer, ie adhesive layer. Also in the hot stamping film of FIG. is provided. In this figure, this three-dimensional pattern 18 is depicted very schematically. This three-dimensional pattern 18 is produced by a corresponding polishing of the carrier film 11, which is provided with a transparent lacquer coating 13.

Next, each example describes the lacquer used in the production of the hot stamping film of the present invention. All parts and percentages are by weight.

Example 1 A lacquer made from the components shown below is a room-temperature crosslinkable lacquer used for the transparent lacquer coating layer 3 of the hot stamping film shown in FIG. 1 or the transparent lacquer coating layer 3 of the hot stamping film shown in FIG. be.

Approximately 60% xylene-butyl acetate mixed solution of acrylic resin having hydroxyl groups with OH content of approximately 8%
41.4 parts Approximately 60% ethyl acetate solution of an adduct of toluylene diisocyanate and hexamethylene diisocyanate with an NCO content of approximately 10% 12.4 parts 34E to DIN (German Industrial Standard) soluble in esters such as ethyl acetate and butyl acetate 53179 15E type nitrified cotton 2.8 parts 20% xylene dispersion of polyethylene wax
4.2 parts Pigment such as pyrogenic silica or similar substance with matting effect 1.3 parts Methyl ethyl ketone 13.8 parts Ethyl acetate 10.3 parts Butyl acetate 13.8 parts 100.0 parts Solid content: 37.1% The above lacquer is transparent by No. 40 cross line screen It is considered as a lacquer coating layer. The dry weight must be at least 2.0 g/ ^m2 . It takes approximately 10 days for this lacquer to fully harden at room temperature, so further processing must be done within 10 days.

Example 2 The lacquer having the components shown below is a thermoplastic lacquer used in the transparent lacquer coating layer 3 of FIG. 1 or the transparent lacquer coating layer 13 of FIG. 2.

Hard poly(methyl methacrylate) 13.8 parts Nitrified cotton of type 34E to 15E according to DIN (German Industrial Standard) 53179, soluble in esters such as ethyl acetate, butyl acetate, etc. 8.6 parts 20% xylene dispersion of polyethylene wax
5.8 parts Pigments such as pyrogenic silica or similar substances that have a matting effect 1.5 parts Ethyl acetate 30.9 parts Toluene 25.1 parts 98% Butyl acetate 14.3 parts 100.0 parts Solid content: 25.1% A clear lacquer coating is formed and dried in air. The dry weight must be at least 1.8 g/m ² .

Example 3 The lacquer of this example is a pigment-dispersed lacquer that forms a pigmented layer in the hot stamping film of FIG. 2, which is provided in place of the metal layer of the hot stamping film of FIG. The ingredients of this lacquer are as follows.

Approximately 40% of rigid poly(methyl methacrylate)
% methyl ethyl ketone solution 18.3 parts Nitrified cotton, type 34E to 15E according to DIN (German Industrial Standard) 53179, soluble in esters such as ethyl acetate, butyl acetate, etc. 7.0 parts Styrene-free unsaturated polyester resin 5.5 parts Ketone with a melting point of 150°C or higher Resin 2.6 parts Pigment 10.0 parts Dispersing agent 0.5 parts Pigneous silica 0.7 parts Methyl ethyl ketone 20.5 parts Toluene 15.7 parts 98% Butyl acetate 19.2 parts 100.0 parts Solid content: 33.6% The above lacquer is made into a pigment colored layer by line screen, Dry in air. The dry weight must be at least 3 g/m ² .

Figure 3 shows surface 7 of the transparent lacquer coating layer 3 in Figure 1.
or to create a three-dimensional pattern 8 on the surface 17 of the transparent lacquer coating layer 13 in FIG.
It shows the essential features of the equipment used to make the. The thermoplastic lacquer is first applied as a transparent lacquer coating layer 3 or 13.

In particular, the apparatus shown in FIG. 3 has a container 21 for a liquid thermoplastic lacquer 22 as described in Examples 2 or 3, and a screen roller 23 operating in conjunction with a rubber pressure device 24. Immersed in thermoplastic lacquer 22. The lacquer film 25, which is adhered to the rotating screen roller 23, is limited to the desired layer thickness determined by the blades 26.

First the carrier film 1, 11 passes between the screen roller 23 and the rubber pressure device 24. Usually, the carrier film 1, 11 is already provided with a release layer 2, 12.

A transparent lacquer coating layer 3, 13 is applied onto the carrier film 1, 11 while the carrier film 1, 11 passes through the gap between the screen roller 23 and the pressure device 24. The film 27 with the transparent lacquer coating layer provided on the carrier film in this manner is dried at a temperature of 80°C to 120°C in the dryer 32.
It is in the range of ℃ and passes through this range. In this dryer 32, the transparent lacquer coating layer is thoroughly dried, ie solidified. Then film 2
7 passes through another pair of rollers. This pair of rollers consists of a roller 28 having an uneven surface and a rubber pressure device 29. The transparent lacquer coating layer 3, 13 is formed by the protrusion 30 provided on the roller 28.
A desired three-dimensional pattern 8, 18 is engraved on the surfaces 7, 17. For example, the textured roller is a heatable calender roller inserted into a multicolor printing press. Generally the rollers 28 are at least
Heated to 150°C, preferably at least approximately 170°C. This temperature is preferred to prevent the three-dimensional pattern 8, 18 from flattening due to renewed softening of the transparent lacquer coating 3, 13 during the actual transfer of the hot stamping film to the object. If softening of the transparent lacquer coating layer 3, 13 does occur, the appearance of the hot stamping film changes when it is applied to the object, since the transfer is carried out at high temperatures.

After passing through the pair of rollers 28, 29, the three-dimensional patterned carrier film and transparent lacquer coating layer combination 31 is further manufactured in the usual manner in the production of hot stamping films.

If the hot stamping film shown in FIG. 1 is to be manufactured, a metal layer 4 is then applied to the composite body 31 by vapor deposition, ie electron beam evaporation. and then an adhesion promoting layer 5 and an adhesive layer,
That is, a heat-sealing layer 6 is provided on the metal layer in a known manner. However, when the hot stamping film of FIG. 2 is manufactured, the pigmented layer 14 is applied to the composite 31 by a printing method similar to that for providing the transparent lacquer coatings 3, 13 described in the description of FIG. established in In this case, after the pigment colored layer 14 is sufficiently cured or dried, an adhesive layer, that is, a heat sealing layer 15 is provided.

When transferring the hot stamping film of the present invention to a suitable object, the adhesive layer of the hot stamping film, that is, the heat sealing layer 6, 15 is used.
Place it facing the object and apply pressure while heating it. As a result, the portion formed from layers 3 to 6 (FIG. 1) or layers 13 to 15 (FIG. 2) of the hot stamping film adheres to the surface of the object. Due to the presence of the release layer 2, 12, the carrier film 1, 11 is separated. This separation of the carrier films 1 and 11 is easily carried out because the release layers 2 and 12, which are, for example, wax layers, are melted by heating.

The metal layer is a combined body 3 with a three-dimensional pattern already provided.
1, the metal layer may first be provided on a film (27 in FIG. 3) having a transparent lacquer coating layer, and then the roughened surface may be provided by rollers 28 and 29. With this manufacturing method, hot stamping films with different appearances can be produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a hot stamping film of the present invention having a metal layer. FIG. 2 is a schematic cross-sectional view of a hot stamping film of the present invention having a pigmented layer. Note that in FIGS. 1 and 2, the thickness of each layer is not shown in a constant ratio. FIG. 3 is a schematic diagram of a transparent lacquer coating layer and an apparatus for forming a three-dimensional pattern on the transparent lacquer coating layer. 1, 11...Carrier film, 2, 12...
...Release layer, 3,13...Transparent lacquer coating layer, 4
... Metal layer, 14 ... Pigment colored layer, 5 ... Adhesion promoting layer, 6, 15 ... Adhesive layer, 7, 17 ... Surface of transparent lacquer coating layer not on the carrier film side, 8, 18 ... Three-dimensional pattern, 21... Container, 22
... thermoplastic lacquer, 23... screen roller, 24, 29... rubber pressure device, 25... lacquer film, 26... blade, 27... film consisting of carrier film and transparent lacquer coating layer, 28 ...a roller with an uneven surface,
30...Protrusion, 31...A combination of a carrier film and a transparent lacquer coating layer having a three-dimensional pattern on the surface other than the carrier film, 32...
…Dryer.

Claims (1)

[Scope of Claims] 1. A carrier film, which is so deep that it appears that the pattern is engraved on the other surface that is exposed during use due to different reflections or refractions of light on the surface other than the carrier film side. A hot stamping film comprising a transparent lacquer coating layer provided with a three-dimensional pattern and an adhesive layer in this order. 2. The carrier film has a release layer on the surface facing the transparent lacquer coating layer, and the adhesive layer has an adhesion promoting layer on the surface opposite to the surface provided with the three-dimensional pattern of the transparent lacquer coating layer. A hot stamping film according to claim 1, characterized in that it has the following. 3. The hot stamping film according to claim 1 or 2, wherein the transparent lacquer coating layer has a metal layer having a substantially constant thickness on the surface having the three-dimensional pattern. 4. The hot stamping film according to claim 3, wherein the metal layer is vapor-deposited. 5. The hot stamping film according to claim 3, wherein the metal layer has a thickness of approximately 500 Å. 6 The thickness of the transparent lacquer coating layer is 1.5 to 3μ.
A hot stamping film according to claim 1, characterized in that: 7. The hot stamping film according to claim 1, wherein the transparent lacquer coating layer is formed of a thermoplastic lacquer at least during the formation of the three-dimensional pattern. 8. The hot stamping film according to claim 1, wherein the transparent lacquer coating layer is formed of a curable lacquer. 9 Carrier film, provided with a three-dimensional pattern on the surface other than the carrier film side so deep that it appears that the pattern is engraved on the other surface exposed during use due to different reflections or refractions of light. A hot stamping film comprising a transparent lacquer coating layer, a pigmented layer and an adhesive layer in this order. 10. The hot stamping film according to claim 9, wherein the carrier film has a release layer on the surface facing the transparent lacquer coating layer. 11. The hot stamping film according to claim 9, wherein the pigment colored layer has a thickness of 2 to 4 μm. 12 The thickness of the transparent lacquer coating layer is 1.5 to 1.5
Claim 9 characterized in that the diameter is 3μ.
Hot stamping film as described in section. 13. The hot stamping film according to claim 9, wherein the transparent lacquer coating layer is formed of a lacquer that is thermoplastic at least during the formation of the three-dimensional pattern. 14. The hot stamping film according to claim 9, wherein the transparent lacquer coating layer is formed of a curable lacquer.