KR100796786B1 - Relief hot stamping and the manufacture method - Google Patents

Abstract

A relief transfer sheet and a manufacturing method thereof are provided to reduce the manufacturing process of a transfer sheet by making the transfer sheet by using printing inks having different glass transition temperatures. A relief transfer sheet includes a substrate film layer(10), a release agent layer(20), a relief pattern printing layer(30), a general pattern printing layer(40) and an adhesive layer(50). The release agent layer is printed on the surface of the substrate film layer. The relief pattern printing layer is printed on the surface of the release layer with a printing ink whose glass transition temperature is low(about -40 deg.C). The general pattern printing layer is printed on the surface of the relief pattern printing layer with a printing ink whose glass transition temperature is high(about 50 deg.C).

Description

Relief transfer paper and its manufacturing method {RELIEF HOT STAMPING AND THE MANUFACTURE METHOD}

1 and 2 are a structure and a manufacturing process of the relief transfer paper of the instant example according to the present invention.

3 is a schematic diagram illustrating a work process in which the relief transfer paper according to the present invention shows a process of transferring and forming a three-dimensional pattern on a to-be-transferred body.

4 and 5 is a structure and manufacturing process of the relief transfer paper of another embodiment according to the present invention.

<Description of the symbols for the main parts of the drawings>

1,100: relief transfer paper 10: base film layer

20: release agent layer 30: relief pattern partial printed layer

40: general pattern printed layer 50: adhesive layer

110: aluminum deposition layer

The present invention relates to a relief transfer paper using a glass transition temperature (Tg) difference of a thermal transfer ink, and a method of manufacturing the same.

In general, the transfer paper is simply printed with various patterns on the film, and provides a decoration to the transfer target in a relatively simple manner by thermal transfer to the surface of the transfer target. It is well-known that it is used for the purpose.

And this transfer paper has been developed from the conventional simple flat pattern to provide a three-dimensional decorative pattern. However, the development of the technology known so far to provide a three-dimensional texture transfer pattern is clearly bounded. Therefore, in order to solve such a problem, development efforts to provide a transfer paper having a three-dimensional and various pattern texture while reducing the manufacturing process of the transfer paper are still in the industry.

Background Art A transfer paper having a three-dimensional pattern texture, which is known in the art, is mainly used as a method of partially dissolving a portion of the transfer paper having a metal deposition layer, a part of which is intended to display a three-dimensional pattern, using a deposition transfer paper on a transfer object.

To explain this in more detail, in the case of the conventional partially dissolved transfer paper, the layer structure of the transfer paper is (1) base film → (2) primary release using a release agent layer coated with (2) acrylic resin as the main component → (3) water-soluble acrylic resin Pattern printing layer → (4) Metal deposition layer using aluminum powder etc. → (5) Protective layer for partially preventing dissolution of lower printing surface → (6) Secondary pattern printing layer mainly based on acrylic resin → (7) It consists of the order of the adhesive bond layer which has the acrylic resin as a main component. Therefore, the partially dissolved transfer paper of the above-described configuration is subjected to the first heat-bonding to the transfer object using an adhesive layer, and then subjected to high heat of about 200 ° C. or higher, and the pattern of the primary pattern printing layer that is not protected by the protective layer. The pattern of the primary printed layer is transferred while being partially dissolved in the object to be transferred to provide a three-dimensional transfer pattern.

However, in the case of the conventional transfer paper having the above-described structure, in spite of providing a three-dimensional pattern texture according to the partial dissolution, there are various problems as follows, the product is very competitive.

First, since there is no difference in glass transition temperature of the printing ink, there is a structural limitation that a metal deposition layer and a protective layer must be provided for partial melting.

Next, since the transfer pattern for partial dissolution based on the metal deposition layer is printed separately in 1st and 2nd order, all manufacturing processes of the transfer paper cannot be uniformly made in one line, and the work process is inevitably separated. There is pain and discomfort. For example, the metal deposition layer is made in a separate line.

In addition, since the printing ink uses all acrylic resins having no difference in glass transition temperature, the layer structure of the transfer paper for the partial dissolution of the transfer pattern is inevitably increased naturally, which requires a lot of manufacturing process and time for the transfer paper. do.

In addition, since the transfer pattern partially melted by high heat is uniformly recessed vertically with respect to the transferred object, there is no difference in height of the recessed portion, thus providing only a touch of the uneven shape, and the difference in the recessed height of the recessed portion. It is very difficult to express the resulting three-dimensional texture.

In addition, since the first and second printed layers are separated and formed based on the metal deposition layer, it is technically very difficult and difficult to precisely match the pattern of the first printed layer when the second printed layer is formed. It is impossible to realistically display the three-dimensional effect of the transfer pattern by focusing on the product, so there is a limit to upgrading the product.

Therefore, conventionally, the partial melting transfer paper has a problem that the manufacturing cost of the transfer paper is naturally increased due to the above problems, and there is a significant technical limitation in providing various and precise three-dimensional transfer patterns by uniform vertical depression. In addition, since the production of the transfer paper is difficult due to the separation of the work process by metal deposition, there is a structural, technical, and economical limitation that the competitiveness of the product is inevitably degraded naturally.

The present invention significantly improves all the problems of the conventional transfer paper as described above, and an object of the present invention is to produce a transfer paper using a printing ink having a different glass transition temperature as a result of a long study of the present inventors. The present invention provides a relief transfer paper and a method of manufacturing the same, which can substantially reduce the realistic three-dimensional impression in a single process line.

In the present invention described above, the first and second pattern printing is performed through printing inks having different glass transition temperatures, and only the embossed patterned printing layer having a low glass transition temperature is melted on the to-be-transferred body to precisely pattern the pint. Since it is possible to match, it becomes possible to form the transfer pattern of a more precise and detailed part, and to provide a three-dimensional effect accordingly.

In addition, according to the object of the present invention, because the relief and general printing is made continuously by using a printing ink having a different glass transition temperature, it is very easy to work because there is no need to match the first and second patterned pints one by one. It's easy.

In addition, according to the present invention, since the height of the relief pattern can be differentially formed according to the printing thickness of the relief pattern partial printing layer, various expressions of more realistic three-dimensional patterns can be expressed as compared with the conventional simple uneven shape. Serves a purpose.

Therefore, in view of the object of the present invention as a whole, it is possible to improve the productivity of the product through a significant shortening of the work process, and to significantly lower the manufacturing cost, according to the three-dimensional formation of the relief pattern according to the concentration difference of the printing ink As well as providing a realistic texture of the transfer pattern, it is possible to accurately represent the required portion in the image of the transfer pattern in three dimensions, thereby solving the problems of the conventional transfer paper at a glance can have a superior quality competitiveness of the product.

The object of the present invention is a base film layer, a release agent layer printed on the surface of the base film layer, and a relief pattern portion printed on the surface of the release agent layer by printing ink having a low glass transition temperature (about -40 ° C). On the surface of the printing layer and the relief pattern partial printing layer, sequentially on the surface of the general pattern printing layer and the general pattern printing layer printed with a printing ink having a glass transition temperature higher (about 50 ° C.) than the relief pattern printing ink. It is sufficiently achieved by a relief transfer paper made of an adhesive layer to be printed.

The ink of the relief pattern printing layer having a low glass transition temperature is NC (Nitrocellulose) or Laroflex MP-45 (trade name) manufactured by BASF, Germany, which improves the dispersibility of the pigment with respect to 80% by weight of polyamide-based resin as a main component. Of various additives in a proportion of 20% by weight, and the ink of the general patterned printing layer having a higher glass transition temperature than the ink of the embossed patterned printing layer is the main component of toluene, diluent or the like with respect to 80% by weight of the acrylic resin. It is preferable to mix | blend the additive of at the ratio of 20 weight%.

The relief pattern is preferably configured such that the three-dimensional pattern transferred to the to-be-transferred body is actually differentially expressed by varying the printing density of the ink.

The relief transfer paper may further be provided with an aluminum deposition layer for providing contrast between the general pattern printing layer and the adhesive layer.

In addition, an object of the present invention, forming a base film layer; A release agent layer forming step for forming a release agent layer on a surface of the base film layer; Forming a relief pattern partial printing layer on the surface of the release agent layer by using a printing ink having a low glass transition temperature (about -40 ° C); Forming a general pattern printing layer on the relief pattern printing layer using a printing ink having a relatively high glass transition temperature (about 50 ° C.) compared to the relief pattern partial printing ink; It is sufficiently achieved by the method of manufacturing the relief transfer paper comprising the step of forming an adhesive layer on the surface of the general pattern printing layer.

In the above manufacturing method, a step of forming a metal layer, more specifically, an aluminum deposition layer, may be further provided between the general pattern printing layer and the adhesive layer to provide contrast of the printed pattern, if necessary.

The relief transfer paper of the present invention made as described above is primarily thermally bonded to a transfer body made of polystyrene resin molding or a plate, and then passed through a heater while the relief print portion having a low glass transition temperature is melted by heat while being transferred. It is possible to be transferred in three dimensions to the transfer pattern can be expressed realistically.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 illustrate the layer structure of the relief transfer paper according to the first embodiment of the present invention and a manufacturing step for manufacturing the same.

First, referring to FIG. 1, the relief transfer paper 1 according to the present invention includes a base film layer 10, a release agent layer 20 printed on the surface of the base film layer, and a glass transition on the surface of the release agent layer. The glass transition temperature of the embossed portion printed layer 30 printed through the printing ink having a low temperature (about -40 ° C) and the embossed portion printed layer is relatively higher than that of the embossed portion printed ink (about 50 ° C.) has a layer structure consisting of a general pattern printing layer 40 printed with a printing ink and an adhesive layer 50 printed on the surface of the general pattern printing layer.

The relief transfer paper 1 is manufactured through the manufacturing process as shown in FIG. 2, which describes the relief transfer paper 1, which includes forming a base film layer 10 (S10); A release agent layer forming step (S20) for forming a release agent layer 20 on the surface of the base film layer; Forming a relief pattern partial printing layer 30 on the surface of the release agent layer by using a printing ink having a low glass transition temperature (about −40 ° C.) (S30); Forming a general pattern printing layer 40 by using a printing ink having a relatively high glass transition temperature (about 50 ° C.) with respect to the pattern printing part of the relief pattern on the remaining portions other than the relief pattern printing layer (S40) and ; It is manufactured through a manufacturing process comprising the step (S50) of forming an adhesive layer 50 on the surface of the general pattern printing layer.

The base film layer 10, which is separated on the basis of the release agent layer 20 when thermally bonded to the transfer member, is generally excellent in electrical properties, and has excellent elasticity, impact resistance, tensile strength, or the like. Fully matte polyester based PET films and OPP based films are mainly used.

The release agent layer 20 facilitates separation of the base film layer 10, increases glossiness and clarity on the relief pattern partial printing layer 30 and the general pattern printing layer 40, and prepares for external impact such as scratches. It is to perform the function of protecting each of the printed layers 30, 40, which is generally a ketone solvent, an acetate solvent, or an aromatic solvent based on the acrylic resin as a main component It is made of and applied.

The embossed partial printed layer 30 formed on the release agent layer 20 is printed to provide a three-dimensional and realistic relief pattern for the object to be transferred, which is polyamide having a low glass transition temperature. The resin is used as the main raw material, and is partially printed by adding and mixing various additives such as NC (Nitrocellulose) which improves dispersibility of the pigment and Laroflex MP-45 (trade name) manufactured by BASF, Germany. As for the mixing ratio of the various additives with respect to the polyamide resin which is the said main component, it is preferable to mix and use various additives, such as NC and Laroflex MP-45, at 20 weight% with respect to 80 weight% of the polyamide resin which is a main component. At this time, the various additives are preferably used evenly mixed in the range of 20% by weight. In addition, the relief pattern partial printed layer 30 may have a three-dimensional pattern texture as it is, or may be different, by making the print density and coating thickness the same.

For example, when printed with the same coating thickness, it is recessed in the transfer body to the same depth when reacting with heat to provide a three-dimensional transfer pattern, and in other cases, the difference in the degree of reaction to heat according to the thickness difference of the print density. Since it is possible to provide a more diverse and realistic three-dimensional impression.

To explain this in more detail, the darker part (thickness) of the print density reacts more strongly to heat, and the deeper the depth of depression of the transferred object, and the blurry part (thin part) is weaker to respond to heat. The depth of depression for the body becomes shallow. Therefore, as compared with being recessed at the same height, the depth of depression for the to-be-transferred body is formed to be differential, and the color is also printed in accordance with the pattern, thereby making it possible to express more realistic three-dimensional patterns.

The degree of application of the print density for forming the relief pattern partial printing layer 30 can be made to any extent through the depth adjustment of the copper plate during the engraving process of the copper plate for forming the relief pattern. Therefore, according to the present invention, it becomes possible to provide a three-dimensional pattern texture by utilizing the yin and yang of various objects as it is in accordance with the relief pattern copper plate working conditions. In addition, since only the relief pattern partial printing layer 30 is recessed in the transfer member in response to heat, fine and fine pieces of print can be expressed in three dimensions.

Next, the general pattern printing layer using the ink containing the acrylic resin (acrylic resin) having a relatively high glass transition temperature compared to the ink for printing the relief pattern in the remaining parts except the embossed portion printed layer 30. 40 is formed. The acrylic resin ink forming the general pattern printing layer 40 is an ink generally used in forming the pattern printing layer of the transfer paper. Inks based on such acrylic resins are also commonly used in combination with the additives according to other working conditions, such as toluene or diluent, relative to 80% by weight of acrylic resins as the main component. At this time, the various additives are preferably used evenly mixed in the range of 20% by weight.

According to the present invention, the printing ink of the embossed partial printed layer 30 containing the polyamide resin as the main component and the printing ink of the general pattern printed layer 40 containing the acrylic resin as the main component have different glass transition temperatures. That is, the glass transition temperature of the polyamide resin for forming the relief pattern partial printing layer 30 is lower than that of the acrylic resin series printing ink for forming the general pattern printing layer 40. For example, the glass transition temperature of a polyamide resin is known as about -40 degreeC, and the acrylic resin is known as about 50 degreeC, and the glass transition temperature between both resins has a considerable difference. Therefore, when heat is applied to the relief transfer paper under a glass transition temperature at which the acrylic resin reacts, the polyamide resin-based printing ink constituting the relief print portion 30 first reacts directly with heat to transfer the object. It is to be recessed in, and by this depression, a three-dimensional transfer pattern can be provided, and the normal pattern printing layer 40 of the acrylic resin series is not reacted with heat so that it is not recessed.

On the other hand, the ink for forming the relief pattern partial printed layer 30 and the general pattern printed layer 40 will be able to use alternative ink having a different glass transition temperature.

For reference, the glass transition temperature (Tg (° C.)) refers to a temperature at which a polymer material loses its hard properties at a specific temperature and starts showing flexible properties such as rubber when it is heated.

Finally, the adhesive layer 50 for thermal adhesion is coated on the surface of the general pattern printing layer 40. It is common that the adhesive layer 50 also uses an acrylic resin, and when heat is applied, the adhesive layer 50 melts in a liquid state and adheres to a transfer object.

According to the present invention, the patterned printing layer 30, 40 is divided into the relief pattern partial printing layer 30 and the general pattern printing layer 40, but described as described, which is due to different printing inks printing the relief pattern The layer 30 is a portion that reacts with heat to be expressed in a three-dimensional pattern texture on the to-be-transferred body, and the general pattern printing layer 40 may be understood as a portion that is not.

The relief transfer paper 1 manufactured by such a manufacturing method does not have a metal deposition layer in which a work is performed in a separate process line as compared with the conventional transfer paper, and the transfer pattern is printed before and after this based on the metal deposition layer. However, since the relief pattern partial printing layer 30 and the general pattern printing layer 40 are continuously made in one working line to provide a three-dimensional transfer pattern for the release agent layer 20, the transfer pattern pint is performed as in the prior art. There is no need to match.

Therefore, according to the relief transfer paper 1 of the present invention, it is possible to significantly shorten the manufacturing process and working time according to the transfer paper production, thereby improving the productivity and quality of the transfer paper, as well as significantly lower the manufacturing cost of the product. There are a number of benefits, including:

Then, the relief pattern of the relief transfer paper 1 according to the present invention is heat-bonded to the transfer object 2 through the method as schematically shown in Figure 3, and the transfer pattern is expressed in three dimensions, Let's take a look at this.

The relief transfer paper 1 according to the present invention is bonded to the decoration of the transfer member 2, which is an extruded product such as polystyrene resin molding or sheet material. This relief transfer paper 1 is primarily thermally bonded to the transfer member 2 being transported along a line in a state of being primarily wound onto a roll. In this process, the relief transfer paper 1 passes through the heating roller 3 and the adhesive layer 50 is adhered to the transfer object 2. In this process, the base film layer 10 is separated from the release agent layer 20. The process of first bonding the above-mentioned relief transfer paper 1 to the to-be-transferred body 2 is a technique well known in the art.

When the adhesion of the relief transfer paper 1 is completed by the indirect heat, the three-dimensional transfer pattern is formed by the relief pattern partial printing layer 30 while passing through the heater 4 installed in the continuous process line.

The heating temperature of the heater 4 is, for the purpose of the present invention, the ink containing the polyamide resin of the relief pattern partial printing layer 30 as the main component, the acrylic resin constituting the general pattern printing layer 40 as the main component Since the acrylic resin has a lower glass transition temperature than the ink, the acrylic resin may be set to react at a temperature lower than that of the heat.

For example, when the acrylic resin reacts between 180 and 200 ° C., the relief pattern partial printed layer 30 may be melted in response to heat in consideration of the glass transition temperature difference, which is lower than 80 ° C. to 100 ° C ..

Therefore, the relief pattern partial printing layer 30 of the relief transfer paper 1 passing through the heater 4 reacts by direct heat of the heater 4 while the relief pattern partial printing layer 30 melts down and is avoided. At the same time, the surface of the transfer member 2 is recessed to match the density of the corresponding ink.

Therefore, as the transfer member 2 passing through the heater 4, the relief pattern in the form of reliefs as shown in FIG. 3 is enlarged on the surface thereof by the relief pattern partial printing layer 30, In addition, since the three-dimensional transfer pattern is recessed differentially according to the ink coating density of the relief pattern partial printing layer 30, the transfer pattern having the same feeling as the actual object can be displayed.

4 and 5 illustrate a layer structure and a manufacturing process showing another embodiment of the relief transfer paper 100 according to the present invention, the layer structure of the relief transfer paper 1 shown in FIGS. 1 and 2, and Compared to the manufacturing process, the metal layer for providing contrast to the printed pattern between the general pattern printing layer 40 and the adhesive layer 50, more specifically, the aluminum deposition layer 110 and the step of forming the same ( S110 is the same except that it is further provided.

Therefore, the relief pattern and the general pattern can be more brightly expressed by the aluminum deposition layer 110.

According to the present invention, due to the structural feature of the relief transfer paper 1, it is possible to express the pattern to be transferred realistically and three-dimensionally, so as to escape from the simple uneven pattern and cause an illusion as much as the actual object. It is possible to manufacture the relief transfer paper. Therefore, when natural objects are adopted as the transfer pattern, it will be possible to express the three-dimensional transfer pattern without compromising the natural thing.

 According to the present invention as described above, it is possible to provide the relief transfer paper having a three-dimensional texture or feel by the relief pattern by forming the relief pattern partial printing layer and the general pattern printing layer using the ink having a glass transition temperature difference. Compared to this, it is possible to significantly shorten the manufacturing process and working time of transfer paper, thereby increasing the work efficiency, improving the productivity of the product, and significantly lowering the manufacturing cost of the product, thereby increasing the quality competitiveness of the product. This will provide an advantage.

In addition, since the degree of depression of the pattern transferred to the to-be-transferred body is generated differentially according to the difference in the ink concentration of the embossed partial printing layer, the expression of the three-dimensional transfer pattern that is more true than the conventional one-dimensional depth pattern is generated. It provides the advantages that become possible.

In addition, the embossed partial printed layer and the general pattern printed layer is not formed to separate the upper and lower portions thereof based on the metal deposition layer as in the prior art, and is continuously formed on the release agent layer, so that the front and rear printed pattern pints are conventionally performed as in the prior art. This eliminates the need for matching, providing the advantage that pattern printing is as simple and easy as it is, and that it is possible to print patterns of fine details.

Further, according to the present invention, as only the relief pattern printed layer printed by the ink having a low glass transition temperature is melted with respect to the transferred object, the three-dimensional pattern is provided, and thus the selection range of the transfer pattern is significantly expanded. In the conventional transfer paper structure, it provides an advantage that it is possible to express in three dimensions to the minute details that cannot be expressed.

Although the present invention has been described with reference to the accompanying drawings, it is not necessarily limited thereto, and many modifications and changes may be made without departing from the scope of the claims.

Claims (8)

A base film layer, a release agent layer printed on a surface of the base film layer, a relief pattern printed layer and a relief pattern printed on a surface of the release agent layer with a printing ink having a low glass transition temperature (about −40 ° C.) It is composed of a general pattern printing layer printed on the surface of the printing layer with a printing ink having a glass transition temperature higher than the embossed pattern printing ink (about 50 ℃) and an adhesive layer sequentially printed on the surface of the general pattern printing layer. Relief transfer paper characterized by. According to claim 1, wherein the ink of the low-pattern relief printed layer is a composition composed of 20% by weight of additives such as NC, Laroflex MP-45, etc. with respect to 80% by weight of polyamide-based resin as a main component The ink of the general pattern printing layer having a glass transition temperature higher than that of the ink of the relief pattern partial printing layer is composed of an additive such as toluene or a diluent in a ratio of 20% by weight to 80% by weight of the acrylic resin as a main component. Relief transfer paper characterized by. The relief transfer paper according to claim 1, wherein the relief pattern partial printing layer is configured such that a three-dimensional pattern is differentially expressed upon transfer to a to-be-transferred body by varying the print density of the ink. The relief transfer paper according to claim 1, further comprising an aluminum deposition layer provided between the general pattern printing layer and the adhesive layer to provide contrast to the printed pattern. Forming a base film layer; A release agent layer forming step for forming a release agent layer on a surface of the base film layer; Forming a relief pattern partial printing layer on the surface of the release agent layer by using a printing ink having a low glass transition temperature (about -40 ° C); Forming a general pattern printing layer using a printing ink having a relatively high glass transition temperature (about 50 ° C.) with respect to the relief pattern partial printing layer; And Forming an adhesive layer on a surface of the general pattern printing layer; Relief transfer paper manufacturing method characterized in that it comprises a. According to claim 5, wherein the ink of the low relief glass pattern printed portion of the printing layer is composed of 20% by weight of additives such as NC, Laroflex MP-45 and the like relative to 80% by weight of the polyamide-based resin of the main component The ink of the general pattern printing layer having a higher glass transition temperature than the ink of the partial pattern printing layer is composed of an additive such as toluene or a diluent in a ratio of 20% by weight to 80% by weight of the acrylic resin as a main component. Relief transfer paper manufacturing method characterized in that. The relief pattern of claim 5, wherein the relief pattern printed layer is formed such that the transfer pattern is differentially expressed upon transfer to a transfer object by varying the concentration of printing ink. Transfer paper manufacturing method. The method of claim 5, wherein the step of forming an aluminum deposition layer for providing a contrast to the printed pattern between the step of forming the general pattern printing layer and the adhesive layer is further provided. Relief transfer paper manufacturing method.

Images