JPS6345315Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a decorative sheet, particularly a transfer paper for producing a decorative sheet having a glittering pattern.

Conventionally, when applying bright colors such as so-called metallic or pearl tones to flooring, wallpaper, or other decorative sheets made of synthetic resin sheets by transfer printing, a backing paper 11 is used as shown in FIG.
On top of the upper release layer 13, a bright ink layer 15, a colored ink layer 17, and a foaming suppressant colored ink layer 1.
Transfer paper with 9 printed on it has been used. However, with such conventional transfer paper, it is difficult to obtain the desired glitter effect, and it is necessary to either settle for a relatively weakened state, or compensate for the amount by using ink with an extremely high concentration of glitter pigment. We have responded.

This reduction in glitter effect (reduction in brightness) is particularly noticeable when manufacturing decorative sheets that involve heating or foaming processes after transfer printing, such as cushion floor materials made of vinyl chloride resin. The following can be mentioned. In other words, the solvent contained in the synthetic resin sheet that accompanies heating, and when the foaming process is involved, the foam decomposition gas and by-products not only disturb the photovolatile pattern layer, but also
It acts on metallic or pearl pigments, causing a decrease in the brightness of the pigment itself. Furthermore, since this bright ink layer is adjacent to normal colored inks and inks with anti-foaming effects, these inks fuse with the bright ink when heated, which not only causes a decrease in brightness, but also deteriorates the design. It also causes confusion and blurring.

In order to compensate for the decrease in the glitter effect, as mentioned earlier, it is necessary to increase the amount of glitter pigment used, but since glitter pigment is very expensive, it is necessary to use a large amount of glitter pigment. It is not desirable to do so because it imposes a large cost burden. Furthermore, these bright pigments have poor adhesion due to their nature, and depending on the application, there is a risk of causing peeling between ink layers. Furthermore, because this conventional transfer paper is printed with bright ink and regular ink directly layered on top of each other, the pattern obtained by transferring this onto a synthetic resin sheet lacks depth and three-dimensionality. The design was also unsatisfactory.

The present invention has been made in order to eliminate the drawbacks of the prior art as described above, and an object thereof is to provide a transfer paper that can prevent a decrease in brightness and provide a decorative sheet that is excellent in strength and design. With the goal.

The present invention will be explained in more detail below.

FIG. 2 is a sectional view showing an embodiment of the present invention,
A release layer 13 is formed on a backing paper 11. On the release layer 13, a glitter ink layer 15, a transparent or translucent second barrier coat layer 21, and a normal colored ink layer 17, Colored ink layers consisting of a combination of colored ink layers 19 containing a foaming suppressant are sequentially formed. Further, FIG. 3 is a sectional view showing another embodiment, in which a first barrier coat layer 23 is further provided on the mold release layer 13, and the bright ink layer is the first barrier coat layer 23.
and a second barrier coat layer sandwiched in a sandwich pattern.

In order to effectively develop a bright pattern, the bright ink layer needs to be on the surface side of the colored ink layer after transfer printing on the transfer material. Therefore, the transfer paper of the present invention is one in which a glitter ink layer is printed on the back layer of a release paper, and a colored ink layer is provided thereon via a barrier coat layer.

The barrier coat layer is provided between the bright ink and other colored inks, or between the bright ink and the release layer, and is formed by heating, ultraviolet irradiation, or other appropriate means to form a tough film. Strongly binds each ink layer. After being transferred to, for example, a synthetic resin sheet, a synthetic resin foam sheet, etc., this layer maintains its shape even when heated for processing these sheets.
In addition, any material may be used as long as it does not allow or does not easily allow volatile components, foaming gas, foam decomposition byproducts, etc. contained in the synthetic resin sheet, synthetic resin foam sheet, etc., to pass therethrough. This barrier coat layer is formed by applying a liquid composition before curing onto the layer printed with bright ink using a conventional coating device or by a method such as gravure printing or screen printing, and then applying it by appropriate means. hardened. The thickness of the barrier coat layer after curing may be appropriately determined depending on the desired decorative sheet.

The material for the barrier coat layer may be any material that can be quickly cured by air drying, heating, ultraviolet irradiation, etc., and can form a strong film. Specific examples of these materials include acrylic urethane resins formed from isocyanate-containing bodies and active hydrogen (-OH, -COOH, _-NH2, etc.) containing bodies that react with isocyanate-containing substances at appropriate temperatures to form molecular crosslinked structures. , polyester urethane resins, polyether urethane resins, epoxy urethane resins, mixtures or copolymer resins of these, or unsaturated polyesters and polyesters containing ultraviolet sensitizers. −
Ultraviolet curing paints (UV paints) consisting of monomers, oligomers, and prepolymers such as acrylates, epoxy acrylates, and polyether-acrylates, and electron beam curing that forms dry coatings by electron beam irradiation with similar chemical components. Mold paints (EB paints), various alkyd resin paints, unsaturated polyester resin paints, which cause molecular crosslinking reactions when heated and, if necessary, in the presence of catalysts.
Reaction-curing resins such as epoxy resin paints are preferred.

The purpose of the present invention can be achieved by providing this barrier coat layer only on the bright ink layer as shown in FIG. 2, but it can also be provided below the bright ink layer as shown in FIG. This is preferable because the glitter ink layer can be fixed more firmly and the glitter ink layer can be more firmly fixed, and it is less susceptible to the effects of glittering substances during heating, so that the glitter effect can be produced more easily.

The transfer paper of the present invention having the above structure is
For example, transfer printing is performed on a synthetic resin sheet using heat and pressure, leaving a release paper behind. In addition to the above-mentioned synthetic resin sheet, examples of the transfer material to be transferred include a foamable synthetic resin sheet, metal, wood, paper, and the like.
After the transfer, a transparent or semitransparent synthetic resin layer may be provided on the printed layer depending on the purpose. As an example, Figure 4 shows an example of a decorative sheet obtained by transfer printing on a foamable synthetic resin layer using the transfer paper of the present invention, providing a transparent synthetic resin layer thereon, and then heating and foaming it. (using the transfer paper shown in Fig. 2) and Fig. 5 (using the transfer paper shown in Fig. 3). For comparison, FIG. 6 shows a decorative sheet similarly obtained using conventional transfer paper. In the figure, 2
5 is a backing paper, 27 is a foam layer, and 29 is a transparent synthetic resin layer (surface layer).

As can be seen from these figures, in the present invention, a transparent or semi-transparent and strong barrier coat layer is provided between the colored ink and the bright ink, and this allows the bright ink and the bright ink to be separated during heating after transfer printing. It can prevent a decrease in brightness due to fusion with normal colored ink or dispersion of bright ink, and can also prevent the image from becoming unclear. In other words, after transfer printing on a foamable synthetic resin sheet, when this sheet is heated to the decomposition temperature of the foaming agent and foamed, the colored ink and bright ink are printed directly over each other as shown in Figure 1. Since these ink layers are also heated at the same time, they may fuse together or the bright ink may disperse, causing a decrease in brightness and even blurring of the image. In contrast, in the present invention, the barrier coat layer provided between each ink layer not only prevents the inks from fusing together, but also prevents the bright ink from dispersing by firmly fixing the bright ink. This makes it possible to prevent pattern distortion and reduction in brightness due to fusion of inks. If the bright ink layer is sandwiched between two barrier coat layers in a sandwich pattern, the bright ink can be more firmly fixed.

Furthermore, this barrier coat layer prevents the permeation and volatilization of volatile substances and decomposition products generated when synthetic resin sheets or foamable synthetic resin sheets are heated, prevents these gases from having an adverse effect on the bright ink, and reduces brightness. It also serves to prevent deterioration. As described above, by providing a barrier coat layer between the bright ink layer and the colored ink layer, it is possible to eliminate various causes that cause the brightness of the bright ink to decrease, and to make the bright ink exhibit its original brightness effect. can. Therefore, it is now possible to use the minimum necessary amount of glitter ink and save on expensive glitter pigments.

Moreover, this barrier coat layer has excellent adhesion to bright inks and ordinary colored inks, and provides strong interlayer strength. Therefore, it is possible to prevent the ink layer from peeling, which tends to occur when bright ink and colored ink are directly bonded, and this makes it possible to prevent the ink layer from peeling off, which tends to occur when bright ink and colored ink are directly bonded. It is also fully usable.

Furthermore, since there is only the thickness of the barrier coat layer between the pattern made with normal colored ink and the pattern made with glitter ink, it is possible to obtain a glitter pattern with a deep and three-dimensional effect as a whole, which is also good for design. preferable. As described above, the transfer paper of the present invention has extremely high utility value.

The main point of the present invention is to provide a barrier coat layer, and any conventionally known release paper, colored ink, bright ink, etc. can be used. For example, bright inks include materials that have light reflectivity, such as metal pigments such as iron powder, copper powder, silver powder, aluminum powder, and metal fibers, natural pearlescent pigments collected from fish and shellfish, mica, and titanium oxide. In addition to pearlescent pigments obtained by coating metal oxides such as, pearlescent pigments obtained from heavy metal salt crystals, potassium titanate whiskers,
Examples include those in which glass powder, glass fiber, metal-deposited film, etc. are dispersed in a normal vehicle.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional transfer paper. 2 and 3 are cross-sectional views showing an embodiment of the transfer paper of the present invention. FIGS. 4 and 5 are cross-sectional views showing decorative sheets manufactured using the transfer paper of the present invention. FIG. 6 is a sectional view showing a decorative sheet manufactured using conventional transfer paper. DESCRIPTION OF SYMBOLS 1... Backing paper, 13... Release layer, 15... Bright ink layer, 17... Colored ink layer, 19... Colored ink layer containing foaming inhibitor, 21... First barrier coat layer, 23... ...Second barrier coat layer, 27...
...Foam layer.

Claims (1)

[Scope of utility model registration request] A release layer is formed on a backing paper, and on the release layer, a glitter ink layer and a transparent or translucent second barrier coat layer are applied, with or without a transparent or translucent first barrier coat layer. A transfer paper characterized in that a barrier coat layer and a colored ink layer are sequentially formed.