JP5914997B2 - Decorative body manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a decorative body, and more particularly, to a method for manufacturing a decorative body having a special visual effect using a microlens.

  2. Description of the Related Art Conventionally, there has been known a decoration material that exhibits a special visual effect by using a microlens sheet in which microlenses that are fine convex lenses are regularly arranged on the surface of a transparent synthetic resin plate. The microlens sheet is an expensive sheet because it is a sheet manufactured by forming fine irregularities on the surface of a thermoplastic resin sheet using a precise mold. The decorative sheet described in Patent Document 1 is provided with a plurality of convex lens-shaped protrusions in a continuous pattern on the surface of a transparent sheet and a pattern having the same continuous pattern as the surface on the back surface of the sheet. It is a decorative sheet printed by being displaced with respect to a pattern.

Attempts have also been made to form microlenses by printing rather than molding. The dot-drawn pattern decorative body described in Patent Document 2 is a regular arrangement of a large number of independent convex condensing elements having transparency on a surface of a transparent substrate by a printing ink having transparency at a constant fine pitch. A large number of colored pixels are printed on the back surface of the transparent substrate in the same shape as the convex condensing elements on the front surface or in the same arrangement state or in different shapes and the same arrangement state. The positional relationship is shifted with respect to the convex condensing element on the surface so that the size changes greatly, and the colored pixels appear as an enlarged image with a stereoscopic effect when viewed from the surface, and the viewpoint is moved. And an enlarged image of a point drawing pattern characterized in that the enlarged image exhibits a sense of fluctuation.
This decorative object is a three-dimensional dot drawing pattern that uses the phenomenon that the amplitude increases or decreases when the crossing angle is shifted by overlapping regular patterns like halftone dots, and the dots appear to fluctuate. It is a decorative body that has appeared.

  The three-dimensional pattern decorative body described in Patent Document 3 is provided with a plurality of layers or a single layer in a predetermined pattern continuously with a dot-like pattern colored in a desired color on the surface of a transparent or opaque decorative body, A transparent dot-shaped convex lens having a substantially hemispherical cross section is continuously attached to the surface of the decorative body and each pattern in the same pattern as the above pattern, and a moire pattern appears on each pattern and each convex lens pattern. The pattern and the convex lens are arranged so as to gradually become dense toward the dense area set on the surface of the decorative body, and are arranged in a rough area set in a portion far from the dense area. It is a three-dimensional pattern decorative body arranged in a gradation that gradually becomes rough toward. This decorative body can three-dimensionally display a gradation moire pattern having a dense area and a rough area.

Japanese Patent No. 2761861 Japanese Patent No. 3338860 JP 2005-193501 A

The decorative sheet described in Patent Document 1 has a problem that it is inevitably expensive because a lens sheet using a mold is used.
Since both the pointed pattern decorative body described in Patent Document 2 and the three-dimensional pattern decorative body described in Patent Document 3 form a lens by printing means, an expensive mold is not required. There are advantages. However, although the details will be described later, when the inventor forms the microlens by the printing means, a problem phenomenon peculiar to printing occurs unless various conditions are appropriately set. It was found that it is not easy to control appropriately.

  This invention is made | formed in view of the said situation, and it aims at providing the manufacturing method of the decorative body which can be manufactured, controlling the shape of a microlens suitably using a printing means.

The present invention provides a second pitch different from the first pitch by using a visual expression pattern formed in a dot pattern at a first pitch on a substrate and a varnish having liquid repellency on the visual expression pattern. The liquid-repellent pattern formed so that the cut-out dot shapes are arranged, the microlens formed on the cut-out dot shape by applying a transparent varnish on the liquid-repellent pattern, the base material, and the visual expression pattern A reflective layer formed between the liquid repellent pattern and the liquid repellent pattern is formed by printing so that the diameter of the microlens is 50 μm or more and 450 μm or less. the lyophobic pattern as the transparent varnish with 6.0μm less coating thickness than 2.5μm along with applied by printing, the diameter of the punching dot shapes is less than 300μm or 200μm to Is formed, the punching dot shape increasing the diameter of the case of setting a small varnish coating thickness is to increase the viscosity of the varnish and the ambient temperature at the time of the varnish coating for forming the micro lenses to be lower, the punching reducing the diameter of the dot shape, when setting a large varnish coating thickness is in the elevated temperature of the atmosphere during the varnish coating for forming the microlens and said to Rukoto to lower the viscosity of the varnish.

In the present invention, it is more preferable that the liquid-repellent pattern is formed so that a dot gap of the extracted dot shape is 30 μm or more and 50 μm or less .

  In the present invention, the diameter of the punched dot shape and the coating thickness may be set so that the ratio between the diameter and the height of the microlens is 5 or more and 45 or less.

  According to the method for manufacturing a decorative body of the present invention, it is possible to manufacture the decorative body while suitably controlling the shape of the microlens using the printing means.

It is sectional drawing which shows an example of the decorative body manufactured by the manufacturing method of the decorative body which concerns on this invention. It is sectional drawing which shows the other example of the decoration body manufactured by the manufacturing method. It is an enlarged plan view for demonstrating the mechanism in which the visual effect produces in the same ornament. FIG. 4 is an enlarged plan view for explaining a mechanism in which a visual effect is generated, in which an enlargement magnification is lowered as compared with FIG. 3. It is an enlarged plan view for demonstrating the other example of the visual expression pattern in the same ornament. It is a figure which shows the state in which the defective lens generate | occur | produced in the decorative body.

Hereinafter, the decorative body according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view showing an example of a decorative body manufactured by the method for manufacturing a decorative body of the present invention. A decorative body 20 shown in FIG. 1 includes a visual expression pattern 3 formed on a substrate 1, a liquid repellent pattern 4 formed on the visual expression pattern 3 using a varnish having liquid repellency, and a liquid repellency. A microlens 5 is formed on the pattern 4 by applying a transparent varnish, and a reflective layer 2 is provided between the substrate 1 and the visual expression pattern 3.

  As the substrate 1, a substrate of any material such as paper, a synthetic resin film, a synthetic resin plate can be used, but from the viewpoint that a fine microlens can be accurately formed even with a large area substrate, Desirable are paper, synthetic resin film, and paper bonded to the offset printing method and gravure rotary printing method. Printing by a screen printing method may be applied using a plate material such as a synthetic resin plate as a base material.

  As the reflective layer 2, a metal foil, a metal vapor deposition layer, an ink layer containing a bright pigment such as a metal powder pigment or a pearl pigment, or the like is used. You may use the vapor deposition paper and vapor deposition film which vapor-deposited aluminum on paper and a film as a base material with a reflecting layer. Due to the presence of the reflective layer 2, the incident external light is reflected by the reflective layer and emitted, so that the amount of reflected light increases and the enlarged pattern appears strongly.

  As the visual expression pattern 3, an arbitrary figure such as a circle, a rectangle, a triangle, a heart shape, or a character can be refined and used. The visual expression pattern 3 is printed using a transparent colored ink or an opaque colored ink which is arranged in a dot pattern and is usually used according to the printing method.

  The liquid repellent pattern 4 is formed using a liquid repellent ink so as to have a plurality of punched dot shapes 4 a having a predetermined diameter. As the liquid-repellent ink, inks obtained by adding a small amount of silicone oil or silicone resin to normally used inks or varnishes, or inks using silicone resins or fluorine-based resins as binders can be used. Usually, the liquid repellent pattern 4 is generally colorless and transparent, but may be appropriately colored in order to obtain a design effect. The shape of the liquid repellent pattern 4 is arbitrarily set such as a polka dot negative arranged in a regular triangle shape as shown in FIG. 3, a polka dot negative arranged in a square shape, a grid pattern, or a honeycomb shape. Can do.

  When a transparent varnish is applied to the surface of the liquid repellent pattern 4 and repelled along the liquid repellent pattern 4, the transparent varnish gathers at the portion of the liquid repellent pattern 4 where the cut-off dot shape 4 a is raised and rises to a convex shape. Form. The transparent varnish is preferably a resin composition with good transparency that does not contain a filler such as a matting agent and has a high solid content. For example, an ultraviolet curable transparent gloss varnish with a solid content of 100% can be preferably used.

  FIG. 2 is a cross-sectional view showing another example of the decorative body 21. In this example, a transparent layer 6 is provided between the reflective layer 2 and the visual expression pattern layer 3. The transparent layer 6 functions to lengthen the optical paths of incident light and reflected light to enhance the stereoscopic effect of the enlarged pattern and improve the visual effect. As the transparent layer 6, a transparent resin coating film or a transparent film can be used.

  When the transparent layer 6 is colored using a transparent pigment or dye, various metallic luster can be expressed. For example, when the reflective layer 2 is made of an aluminum foil and the transparent layer 6 is made tan, gold can be expressed. Similarly, when the transparent layer 6 is gray, a stainless steel texture can be provided.

  FIG. 3 is an enlarged plan view showing a mechanism in which a visual effect due to an enlarged pattern occurs in the decorative body according to the present invention. In this example, the visual expression pattern 3 is a circular dot and is arranged in a regular triangle shape with a constant visual expression pattern pitch (first pitch) 7. A liquid repellent pattern 4 formed from above using liquid repellent ink is provided. The liquid repellent pattern 4 is a set of circular dot negative patterns arranged at regular microlens pitches (second pitches) 8 in a regular triangle shape, that is, an extracted dot shape 4a. The microlens 5 is formed by the applied transparent varnish being bounced and gathered into the extracted dot shape 4a. The diameter of the microlens 5 is suitably about 0.05 mm to 0.45 mm.

  If the visual expression pattern pitch 7 and the microlens pitch 8 are set to different values, the positional relationship between the dots of the visual expression pattern 3 and the microlens 5 gradually shifts and tries to match again at a position shifted by one pitch. In the part where both coincide, the central part of the visual expression pattern 3 is enlarged by the microlens 5, and in the part where they do not coincide, the intermediate part of the two adjacent visual expression patterns is enlarged by the microlens 5. In this way, the portion of the visual expression pattern to be enlarged gradually shifts and moves back to the original position at a position shifted by one pitch. As a result of repeated coincidence and inconsistency of the pitch, a visual effect that is recognized as if the visual expression pattern has been enlarged occurs when viewed with the naked eye. The visual expression picture pitch 7 and the microlens pitch 8 are preferably set to be different from each other in a range of about 0.05 mm to 1.0 mm.

  FIG. 4 is an enlarged plane explanatory view showing a mechanism of occurrence of an enlarged pattern, in which the enlargement magnification is lowered as compared with FIG. As can be seen from the figure, a region 9 in which the central portion of the visual expression pattern is enlarged and a region 10 in which the middle portion of the visual expression pattern is enlarged appear at regular intervals. This appears as an enlarged pattern and is recognized by the naked eye.

  FIG. 5 is an enlarged plan view illustrating another example of a decorative body. In this example, a rectangular visual expression pattern 3a is formed, and the visual expression patterns 3a are arranged at the same visual expression pattern pitch 7 as in FIG. The specifications of the microlens 5 are the same as in FIG. 3, and the microlens pitch 8 is also the same. If it does in this way, the expansion pattern of the square shape which is the shape of the visual expression pattern 3a will appear as an expansion pattern. As the visual expression pattern, a pattern having an arbitrary shape can be used other than the above-described circle and rectangle, and the enlarged pattern that appears is a figure obtained by enlarging the original visual expression pattern.

  The above is an outline of the decorative body manufactured by the manufacturing method of the present invention. When such a decorative body is manufactured using printing, the diameter of the cut-off dot shape 4a of the liquid repellent pattern 4 and the microlens 5 are described. The inventor has found that there is a high possibility of various problems if the coating thickness of the transparent varnish that forms the film is not set appropriately.

  That is, if the diameter of the punched dot shape 4a and the microlens pitch are too small for the coating thickness of the transparent varnish that forms the microlens 5, adjacent microlenses are combined as shown in FIG. BL1 occurs. Since the visual expression pattern 3 below the defective lens BL1 is not enlarged as intended, the visual effect may be attenuated without contributing to the visual effect of the decorative body.

  In addition, if the height (thickness) is too small with respect to the diameter of the microlens, the curvature of the upper surface of the microlens is too small, so that the visual expression pattern is not sufficiently expanded by the microlens, and the mechanism is different from the above. Visual effects are diminished or lost.

  As described above, it has been found that in order to suitably manufacture the decorative bodies 10, 11 and the like using printing, it is not always easy to set conditions, and various parameters need to be optimized. The inventor has studied to clarify suitable conditions for each parameter described above, and will be described below.

First, the conditions for study are shown.
As a base material having a reflective layer, VM-PET bonding paper (trade name Brillian Silver S, manufactured by Keio Paper Co., Ltd., basis weight 310 g / m ² , size 650 mm × 950 mm) was used. On this base material, a transparent yellow ink (trade name FDOL-MP, manufactured by Toyo Ink Manufacturing Co., Ltd.) is solidly printed on the lower layer, and then black ink (trade name FD Carton ACE, manufactured by Toyo Ink Manufacturing Co., Ltd.) The dots were printed at a pitch to form a visual expression pattern.

Next, using a transparent varnish, a liquid-repellent pattern was formed with a predetermined dot diameter (diameter of the dot shape, set value of the diameter of the microlens) and dot gap (difference between the microlens pitch and the lens diameter). .
Furthermore, a transparent varnish for forming a microlens was applied at a predetermined coating thickness and cured by UV irradiation to form a microlens.

The set values of the dot diameter and dot gap for each group and the varnish coating thickness are as follows. In addition, the pitch of the visual expression pattern in each group is also shown.
Group 1
Extracted dot diameter 60μm, dot gap 20μm (microlens pitch 80μm)
Varnish coating thickness 3.7μm
Visual expression pattern pitch 90μm
Group 2
Dot diameter 80μm, dot gap 30μm (micro lens pitch 110μm)
Varnish coating thickness (number of samples in parentheses) 4.5 μm (1), 3.7 μm (1)
Visual expression pattern pitch 120μm
Group 3
Dot diameter 140μm, dot gap 30μm (microlens pitch 170μm)
Varnish coating thickness (number of samples in parentheses) 4.5 μm (1), 3.7 μm (1)
Visual expression pattern pitch 160μm
Group 4
Dot diameter 300μm, dot gap 30μm (micro lens pitch 330μm)
Varnish coating thickness (number of samples in parentheses) 6.2 μm (1), 5.7 μm (1), 4.5 μm (1), 3.7 μm (1), 2.5 μm (1), 2.0 μm (1)
Visual expression pattern pitch 310μm
Group 5
Extracted dot diameter 500 μm, dot gap 40 μm (microlens pitch 540 μm)
Varnish coating thickness (number of samples in parentheses) 4.5 μm (1), 3.7 μm (1)
Visual expression pattern pitch 510μm
Group 6
Dot diameter 550μm, dot gap 50μm (micro lens pitch 600μm)
Varnish coating thickness 3.7μm
Visual expression pattern pitch 540μm

The following evaluation was performed on each sample of each group.
Lens diameter (μm) In each sample, the diameters of 10 randomly selected microlenses were measured and taken as the average value.
Lens height (μm) Five cross-sectional samples (width 30 mm) in the thickness direction were prepared for each sample, and each cross-sectional sample was measured to obtain the maximum height of the microlens. The average value of the maximum values of each sample was defined as the lens height.
Visual evaluation Comprehensive evaluation of the visual effect of the visual expression pattern and the appearance of the decorative body for a 30 mm × 30 mm region randomly set in each sample, ○: Can be used as a product without problems, Δ: Slightly inferior in quality but can be used as a product, x: evaluated in three stages, not usable as a product.
The results are shown in Table 1.

As shown in Table 1, in Group 1, a number of defective lenses in which adjacent microlenses were combined were confirmed. As a result, the appearance defect was remarkable and the product was not usable. Similar defective lenses were also observed in each sample of Group 2 and a sample of Group 3 with a varnish coating thickness of 4.5 μm, but the frequency was not as remarkable as in Group 1, and all of them were usable as products.
On the other hand, in Group 6, since the curvature of the surface of the microlens was too small, the visual effect was hardly confirmed, and it was a level that cannot be used as a product. Further, in the sample having a varnish coating thickness of 3.7 μm in Group 5, the visual effect was slightly difficult to see due to the small curvature of the microlens surface, but it was at a level that can be used as a product.
Further, in Group 4, which was studied by setting the varnish coating thickness in multiple stages, a lot of defective lenses were generated in the sample having a varnish coating thickness of 6.2 μm, and the product was not usable. Moreover, the visual effect was hardly confirmed with the sample of varnish coating thickness 2.0micrometer, and it became the level which cannot be used as a product.
In other samples, a defective lens was not generated due to the combination of the microlenses, and a decorative body with sufficient visual effect could be obtained.
Group 6 was a group set to improve the curvature of the microlens by enlarging the dot gap with respect to group 5 and then increasing the varnish grain, but small residual varnish grains were found in the dot gap. Occurred. In Group 6, many varnish remaining grains were generated, and the surface appearance was matte. It has been found that the dot gap is preferably 40 μm or less, and when it is excessively widened, varnish particles unrelated to the visual effect are likely to be generated.

From the above examination results, if the dot diameter of the liquid-repellent pattern is in the range of 80 μm to 500 μm, the coating thickness of the varnish for forming the microlens is generally in the range of 2.5 μm to 6.0 μm. The diameter of the microlens was in the range of 50 μm to 450 μm, and it was confirmed that the decorative body can be suitably manufactured by printing.
Further, it was suggested that when the punched dot diameter is in the range of 200 μm, the decorative body can be manufactured almost favorably even if the varnish coating thickness is not strictly controlled within the above range.

Furthermore, within the above range, when setting the extraction dot diameter to be large and the varnish coating thickness to be small, increase the viscosity of the varnish by lowering the ambient temperature at the time of varnish coating to form the microlens, When setting the diameter of the cut dots to be small and the varnish coating thickness to be large, decoration can be more suitably achieved by lowering the viscosity of the varnish by increasing the ambient temperature during varnish coating to form microlenses. It was thought that the body could be manufactured.
Furthermore, as a guideline, it is preferable to set the above-mentioned various parameters by a preliminary test or the like so that the ratio of the formed microlens diameter to the lens height (lens diameter / lens height) is 5 or more and 45 or less. It was suggested that decorative bodies could be manufactured.

  Although the present invention has been described above, the technical scope of the present invention is not limited to the above-described embodiment, and various modifications and deletions may be made to each component without departing from the spirit of the present invention. Is possible.

DESCRIPTION OF SYMBOLS 1 Base material 2 Reflective layer 3, 3a Visual expression pattern 4 Liquid-repellent pattern 4a Dot shape 5 Micro lens 7 Visual expression pattern pitch (1st pitch)
8 Micro lens pitch (second pitch)
10, 11 Decorative body

Claims (3)

A visual expression pattern formed in a dot pattern at a first pitch on a substrate, and a dot shape extracted at a second pitch different from the first pitch using a liquid-repellent varnish on the visual expression pattern Between the liquid repellent pattern formed so as to be arranged, a microlens formed on the extracted dot shape by applying a transparent varnish on the liquid repellent pattern, and the substrate and the visual expression pattern A method for producing a decorative body having a formed reflective layer,
The liquid repellent pattern is formed by printing so that the diameter of the microlens is 50 μm or more and 450 μm or less,
On the liquid repellent pattern, the transparent varnish is applied by printing with a coating thickness of 2.5 μm or more and 6.0 μm or less,
The liquid repellent pattern is formed so that the diameter of the punched dot shape is 200 μm or more and less than 300 μm ,
In the case where the diameter of the blank dot shape is large and the varnish coating thickness is set small, the viscosity of the varnish is increased by lowering the ambient temperature during varnish coating to form the microlens. the diameter small and to set a large varnish coating thickness, production of ornamental body, wherein to Rukoto to lower the viscosity of the varnish in the elevated temperature of the atmosphere during the varnish coating for forming the micro lenses Method.   The method for producing a decorative body according to claim 1, wherein the liquid repellent pattern is formed so that a dot gap of the extracted dot shape is 30 µm or more and 50 µm or less. 3. The decorative body according to claim 1, wherein the diameter of the punched dot shape and the coating thickness are set so that a ratio between a diameter and a height of the microlens is 5 or more and 45 or less. Production method.

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