JP3103455U - Three-dimensional molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional molded body which is printed by UV offset printing and has excellent appearance quality.
According to the present invention, a resin sheet with a UV cured layer formed by forming a printing surface (UV cured layer) 24 by UV offset printing on at least one surface of a thermoplastic resin sheet is formed into a predetermined shape. The three-dimensional molded body 10 having the curved portions 12, 14, 16 bulging on the printing surface side or the opposite side is provided. Cracks are not substantially visible in the curved portions 12, 14, and 16. This three-dimensional molded body 10 is suitable as a dummy container or the like arranged in a vending machine.
[Selection diagram] Fig. 1

Description

  The present invention relates to a three-dimensional molded body in which at least one surface (a front surface and / or a back surface) of a thermoplastic resin is printed with UV ink. In particular, it is suitable as a component of a product sample for sales promotion (for example, a dummy container arranged in a vending machine) and various in-mold resin molded products (for example, plastic members for interior and / or exterior of automobiles). A three-dimensional molded body.

  In general, offset printing has features that the reproducibility of a pattern is better than that of gravure printing and silk screen printing, and that it is suitable for mass production. On the other hand, when a general oil-based ink is used for printing on the surface of a chemical material material (typically, a resin material such as a polyester resin or a polypropylene resin), the drying time is usually reduced because the chemical material material does not absorb the ink. It tends to be long. This is not preferable from the viewpoint of mass productivity. In particular, in offset printing using inks of multiple colors (for example, four colors) or more, the drying time of the ink has a large effect on mass productivity, and the original features of offset printing may not be fully utilized.

  The oil-based ink as described above is dried by the volatilization and removal of the organic solvent from the ink (that is, the ink is cured). On the other hand, there is known an ink (ultraviolet curable ink composition, so-called UV ink) which is cured (dried) by irradiation with UV (ultraviolet light). By using UV ink instead of oil-based ink, the time required for curing the ink can be significantly reduced. Therefore, UV offset printing using such a UV ink is suitable for mass-producing products (for example, multicolor printing) on chemical product materials.

  By the way, as a three-dimensional molded body in which printing is performed on the surface of a thermoplastic resin, a resin sheet with a printing layer, which is printed on the surface of a sheet made of a thermoplastic resin (on which a printed layer is formed), is heated to a desired three-dimensional shape. Some are deformed (thermoformed). When the previously printed thermoplastic resin sheet (printed layer-attached resin sheet) is deformed into a desired three-dimensional shape, the printed layer is deformed together with the sheet. For example, when a part of the resin sheet with a printing layer is expanded (projected or concavely deformed) to the printing surface side or the opposite side, the resin sheet with a printing layer is stretched at that portion. At this time, the printing surface formed by conventional offset printing of oil-based ink can follow stretching to some extent. However, the printing surface (printing layer) by the UV offset printing cannot follow the stretching of the resin sheet, and cracks occur on the printing surface. Such cracks are not preferable because they deteriorate the appearance quality of the three-dimensional molded body.

  Therefore, an object of the present invention is to provide a three-dimensional molded body that has been printed by UV offset printing and has excellent appearance quality.

  According to the present invention, a resin sheet with a UV cured layer formed by forming a cured layer of the UV ink on at least one surface (front or back surface) of a thermoplastic resin sheet by UV offset printing using a UV ink is formed into a predetermined shape. A molded three-dimensional molded body is provided. The three-dimensional molded body has a curved portion bulging on the surface side (that is, the printing surface side) or on the opposite side. That is, the hardened layer may be formed on the outer surface (front surface) of the curved portion, may be formed on the inner surface (rear surface), or may be formed on both surfaces. Then, substantially no crack is visually recognized in the curved portion. Here, "the crack is not visually recognized" means that in a normal use state of the three-dimensional molded body, no crack is visually observed by the naked eye. The three-dimensional molded body having such a configuration has good appearance quality. That is, the cured layer (printed surface) located at the curved portion may have a smooth appearance without cracks. Further, since it has a cured layer (UV offset printing layer) formed by UV offset printing, it is excellent in mass productivity. In addition, the reproducibility (for example, accuracy) of the pattern is high due to the presence of the UV offset printing layer. Such a three-dimensional molded body is suitable as a dummy container or the like constituting a sample for sales promotion of a product (for example, a beverage). The cured layer may be formed on the side (front side) directly visible in a normal use state of the three-dimensional molded body, or may be formed on the side (back side) visible through a thermoplastic resin sheet. And may be formed on both surfaces.

  In a preferred aspect of the present invention, the thickness of the curved portion (that is, the thickness of the three-dimensional molded body in the curved portion) is at least 0.05 mm. In a more preferred aspect, the thickness of the curved portion is 0.05 to 1.5 mm. In a further preferred embodiment, the thickness of the cured layer is 0.1 to 1.0 mm. A three-dimensional molded body having such a curved portion may have a higher quality appearance.

  The three-dimensional molded body disclosed herein may have, for example, a shape having a curved portion that forms a divided cylindrical surface obtained by dividing a substantially cylindrical surface in a vertical direction. The divided cylindrical surface can have a substantially arc-shaped cross-sectional shape with a radius of 20 to 60 mm and a central angle of 120 to 180 °. In a preferred aspect, the divided cylindrical surface has a substantially arc-shaped cross-sectional shape having a radius of 20 to 40 mm and a central angle of 150 to 180 °. A three-dimensional molded body having such a shape and having a cured layer having a thickness of 0.1 to 1.0 mm is preferable. The three-dimensional molded body provided with the curved portion having the above shape is suitable as a three-dimensional molded body constituting a product sample for sales promotion (for example, a dummy container constituting a sample product for selling a beverage). In particular, it is suitable as a dummy container arranged in a vending machine (that is, a vending machine sample or the like). A cured layer formed by UV offset printing has excellent performance of expressing a pattern with a high density. Therefore, according to the three-dimensional molded body having such a cured layer, the pattern can be clearly expressed even when illumination is applied from the back side of the printed layer.

  In a preferred aspect of the present invention, the curved portion constitutes a divided cylindrical surface obtained by dividing a substantially cylindrical surface in a vertical direction, and the divided cylindrical surface has a radius of 25 to 40 mm and a substantially arc shape having a central angle of 150 to 180 °. Having a large diameter portion having a cross-sectional shape of. Further, the curved portion constitutes a divided cylindrical surface obtained by dividing a substantially cylindrical surface in a vertical direction, and the divided cylindrical surface has a radius of 12 to 20 mm and a small diameter having a substantially arc-shaped cross-sectional shape having a central angle of 150 to 180 °. Having a part. Further, the curved portion forms a divided conical surface obtained by dividing a substantially conical surface in a vertical direction, the divided conical surface has a substantially arc-shaped cross-sectional shape having a central angle of 150 to 180 °, and the large diameter portion And a tapered portion connecting one end of the small diameter portion to one end of the small diameter portion. The large diameter portion, the tapered portion, and the small diameter portion are formed coaxially. The axial length of the tapered portion is 15 to 50 mm. A three-dimensional molded body having a curved portion having such a shape is suitable, for example, as a dummy container arranged in a vending machine.

A typical example of the three-dimensional molded body disclosed herein is obtained by thermoforming a resin sheet with a UV cured layer into a predetermined shape. For example, it may be a three-dimensional molded body formed into a predetermined shape by vacuum molding, pressure molding, or die molding (press molding). Alternatively, a three-dimensional molded body formed by another method may be used.
The three-dimensional molded body provided by the present invention is a three-dimensional molded body obtained by forming a plurality of curved portions at intervals (for example, an interval of about 2 to 10 cm) on one resin sheet with a UV cured layer. obtain. For example, it may be a three-dimensional molded body in which three or more dummy containers forming a sample product for selling beverages are formed at intervals in the lateral direction of the container. It may be a three-dimensional molded body from which a portion corresponding to each dummy container is cut out.

  Examples of the thermoplastic resin sheet (that is, the sheet before forming the UV cured layer) that can be used in the present invention include polycarbonate resin, polyester resin (polyethylene terephthalate resin, polyethylene naphthalate resin, etc.), and polyolefin resin (polyethylene resin, propylene resin, etc.). And those mainly composed of a thermoplastic resin material such as an acrylic resin. Among these, a preferable example is a thermoplastic resin sheet made of polyethylene terephthalate (PET) resin. Another preferable example is a thermoplastic resin sheet made of polycarbonate (PC) resin. According to such a thermoplastic resin sheet, a three-dimensional molded body having at least one property out of appearance quality (print quality), weather resistance, heat resistance, dimensional stability, and the like can be formed. From the viewpoint of environmental protection and the like, a thermoplastic resin sheet mainly composed of a biodegradable thermoplastic resin (a so-called biodegradable resin, for example, polylactic acid resin) can be preferably used. The thickness of the thermoplastic resin sheet can be, for example, 0.05 mm or more (typically 0.05 to 2 mm, preferably 0.1 to 1.0 mm).

  The cured layer (printing layer) provided in the three-dimensional molded body of the present invention may be formed using at least one color of UV ink, but is not limited thereto. For example, four or more colors of UV ink It can be formed using In a three-dimensional molded body on which such multicolor printing has been performed, the effect of employing UV offset printing is particularly well exhibited. The three-dimensional molded body of the present invention may have a silk printing layer (for example, a layer formed by silk printing using a UV ink) above and / or below the cured layer. The three-dimensional molded body having such a configuration can be a three-dimensional molded body having further excellent appearance quality. Further, the three-dimensional molded body of the present invention may have a primer layer below the cured layer. By providing the primer layer, the adhesion between the UV ink and the thermoplastic resin sheet (substrate) can be improved. Therefore, the three-dimensional molded body having such a configuration can have better appearance quality.

  In a preferred embodiment of the present invention, the cured layer comprises 40 to 60% by mass of an urethane acrylate resin, 5 to 20% by mass of an acrylic photoreactive diluent, and 10 to 40% by mass based on the whole ink. And a UV curable layer obtained by UV curing one or more UV inks containing a colorant. The cured layer formed from such a UV ink is less likely to crack at the curved portion even when molded thereafter. Therefore, it is suitable as a hardened layer constituting the three-dimensional molded body of the present invention. In a preferred aspect, the curved portion constitutes a divided cylindrical surface obtained by dividing a substantially cylindrical surface in a vertical direction, and the divided cylindrical surface has a substantially arc-shaped cross-sectional shape having a radius of 20 to 40 mm and a central angle of 150 to 180 °. . Such a three-dimensional molded body is suitable as a dummy container (particularly, a dummy container arranged in a vending machine) constituting a sample product for selling beverages.

  Hereinafter, preferred embodiments of the present invention will be described in detail. It should be noted that technical matters other than those specifically mentioned in the present specification and necessary for implementing the present invention can be grasped as design matters of those skilled in the art based on the conventional technology. The present invention can be implemented based on the technical contents disclosed in the present specification and the common technical knowledge in the relevant field.

  FIG. 1 shows an example of a three-dimensional molded product comprising the three-dimensional molded body according to the present invention. The three-dimensional molded product shown in FIG. 1 is a three-dimensional molded product used as a dummy container 10 arranged in a vending machine. For example, as shown in FIG. 5, it is arranged in a product sample display section 32 provided on the front panel of the vending machine 30 for beverages in containers. For this reason, the dummy container 10 is manufactured so as to have an appearance (shape and pattern) imitating the front half of a product (contained beverage) actually sold by the vending machine 30. The dummy container 10 shown in FIG. 1 is an example in which a 350 ml beverage bottle having a detachable cap at a drinking spout is formed into a shape that simulates a front half of a vertically divided (axial) half. As shown in the drawing, the dummy container 10 has a shape in which a large diameter portion 12, a tapered portion 16, and a small diameter portion 14 are connected in this order. The large diameter portion 12 is a portion corresponding to a portion for accommodating a beverage in an actual product, and is formed of a divided cylindrical surface having a substantially arc-shaped cross section having a radius of about 35 mm and a central angle of about 180 °. At the lower end of the large diameter portion 12, a semicircular bottom surface 13 is formed continuously. The small diameter portion 14 is a portion corresponding to a portion constituting a drinking spout in an actual product, and is composed of a divided cylindrical surface having a substantially arc-shaped cross section having a radius of about 15 mm and a central angle of about 180 °. A semicircular top surface 15 is continuously formed at the upper end of the small diameter portion 14. The tapered portion provided between the large-diameter portion 12 and the small-diameter portion 14 has a substantially arc-shaped cross-sectional shape having a central angle of 120 to 180 °. In an actual product, a part of the small-diameter portion 14 and a portion corresponding to the top surface 15 constitute a detachable cap. However, the dummy container 10 includes a portion corresponding to the cap from the bottom surface 13. The whole up to the top surface 15 is integrally formed.

  FIG. 2 shows a cross section (cross section) of the dummy container 10 cut at the large diameter portion 12. Note that “r” in FIG. 2 indicates a radius in the cross-sectional shape of the large diameter portion 12, and “θ” indicates a central angle in the cross-sectional shape. As shown in the figure, the large-diameter portion 12 has a UV-curable-layer-attached thermoplastic resin sheet 20 having a UV-curable layer (printing layer) 24 on the back surface of a thermoplastic resin sheet 22, on the front side (the side opposite to the cured layer) It is formed into a curved shape that bulges into the shape. The UV cured layer 24 is formed by UV offset printing using six colors of UV ink, and is formed from the outer peripheral edge of the bottom surface 13 through the large diameter portion 12, the tapered portion 16, and the small diameter portion 14 to the top surface. 15 is provided on almost the entire surface. In addition, in the dummy container 10 according to the present embodiment, no crack is visually recognized in any of the large-diameter portion 12, the small-diameter portion 14, and the tapered portion 16 when viewed from the surface side.

This dummy container 10 is produced, for example, as follows.
That is, a transparent thermoplastic resin sheet (for example, a PET sheet) having a thickness of about 0.4 mm is prepared. Further, 40 to 60% by mass of the urethane acrylate resin, 5 to 20% by mass of an acrylic photoreactive diluent (photocurable monomer and / or oligomer), and 10 to 40% by mass with respect to the whole composition. UV inks (ultraviolet curable ink compositions) containing the above coloring agents are prepared for the number of colors to be used for printing (here, six colors). Then, UV offset printing is performed on one surface of the thermoplastic resin sheet (in the present embodiment, the side that becomes the back surface of the finally obtained dummy container) using the UV ink. Typically, the UV ink of each color is sequentially attached to a thermoplastic resin sheet, and the attached UV ink is irradiated with ultraviolet rays (UV) to be cured. This UV irradiation may be performed every time the UV inks of two or three colors are applied, or may be performed collectively after the UV inks of all colors are applied. Thereby, as shown in FIG. 3, a resin sheet 20 with a UV cured layer in which the cured layer 24 of the UV ink is formed on one surface (back surface) of the thermoplastic resin sheet 22 is obtained. At this stage, the UV cured layer-attached resin sheet 20 has a flat or almost flat shape. In addition, the resin sheet 20 with a UV cured layer may be configured to have a primer layer (not shown) below the cured layer 24. This primer layer can be formed by attaching (for example, applying) a known primer or the like to the thermoplastic resin sheet 22 before performing UV offset printing. Further, the resin sheet 20 with a UV cured layer may be configured to have a silk print layer (not shown) above and / or below the cured layer 24. For example, a configuration in which a silk print layer is provided on the cured layer in a range corresponding to the entire back surface of the dummy container shown in FIG. The formation of the primer layer and / or the silk print can be performed using a UV-curable, solvent-based, water-dispersed, or other known material.

  Next, the resin sheet 20 with a UV cured layer shown in FIG. 3 is thermoformed. Thereby, as shown in FIG. 4, a plurality of curved portions (projections) corresponding to the plurality of dummy containers 10 are formed on one sheet 20 at intervals. This curved portion may have a thickness of, for example, about 0.2 to 0.3 mm. FIG. 4 shows a cross section of the thermoformed sheet 20 cut at a position corresponding to the large-diameter portion 12 of each dummy container 10 (for example, a position along the line II-II shown in FIG. 1). An interval 26 of about 50 mm is provided between the large diameter portions 12. This thermoforming may be performed by any method such as vacuum forming, pressure forming, die forming (press forming), and the like. For example, when the resin sheet 22 is made of PET, press molding can be performed at a heating temperature of about 300 to 400 ° C. FIG. 4 shows the large-diameter portions 12 corresponding to the four dummy containers 10. However, the large-diameter portions 12 corresponding to the four or more dummy containers 10 are arranged in the horizontal direction of the sheet 20 (the left and right sides in FIG. 4). (Direction) with an interval 26 therebetween. Further, curved portions (convex portions) corresponding to the plurality of dummy containers 10 can also be formed in the vertical direction of the sheet 20 (the direction of the paper surface of FIG. 4) with an interval 26 therebetween. After that, the curved portion corresponding to each dummy container 10 is separated from its surroundings (flat portion), and the dummy container 10 having the shape shown in FIG. 1 can be obtained. Alternatively, without separating the dummy containers 10 individually, a three-dimensional molded product in which two or more dummy containers 10 are connected vertically and / or horizontally may be arranged in a vending machine and used as a product sample.

Although specific examples of the present invention have been described in detail above, these are merely examples, and do not limit the scope of the utility model registration claims. The technology described in the utility model registration claims includes various modifications and changes of the specific examples illustrated above.
In addition, the three-dimensional molded article of the present invention is not limited to a case where the entire product takes the form of an independent product (three-dimensional molded product) having the above-mentioned curved portion, but also a part of another product (such as an in-mold resin molded product). It may be configured. The claims of the present invention may include a three-dimensional molded body used in such a form.
Further, the technical elements described in the present specification or the drawings exhibit technical utility singly or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

FIG. 2 is a perspective view schematically illustrating the three-dimensional molded body according to the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. 1. It is sectional drawing which shows the resin sheet with a UV hardening layer before thermoforming typically. It is sectional drawing which shows the resin sheet with a UV cured layer thermoformed typically. It is an explanatory view showing typically a vending machine in which the three-dimensional molded object concerning the present invention was arranged.

Explanation of reference numerals

10: Dummy container (solid molded body)
12: Large diameter part (curved part)
14: Small diameter part (curved part)
16: tapered part (curved part)
20: UV cured layer-attached resin sheet 22: Thermoplastic resin sheet 24: UV cured layer 30: Vending machine 32: Product sample arrangement part r: Radius θ: Central angle

Claims (24)

A three-dimensional molded body in which a resin sheet with a UV cured layer formed by forming a cured layer of the UV ink on the front surface and / or the back surface of a thermoplastic resin sheet by UV offset printing using a UV ink is formed into a predetermined shape,
The three-dimensional molded body has a curved portion swelling on the front surface side or the back surface side, and substantially no crack is visually recognized in the curved portion.   The three-dimensional molded body according to claim 1, which constitutes a product sample for sales promotion.   The three-dimensional molded body according to claim 1, wherein the thickness of the curved portion is at least 0.05 mm.   The three-dimensional molded body according to claim 3, wherein the thickness of the curved portion is 0.05 to 1.5 mm.   The three-dimensional molded body according to claim 4, wherein the thickness of the curved portion is 0.1 to 1.0 mm.   The said curved part comprises the division | segmentation cylindrical surface which divided | segmented the substantially cylindrical surface in the longitudinal direction, The divided cylindrical surface has a radius of 20-60 mm, and has a substantially arc-shaped cross-sectional shape with a central angle of 120-180 degrees. 3. The three-dimensional molded body according to 1.   The three-dimensional molded body according to claim 6, wherein the divided cylindrical surface has a substantially arc-shaped cross-sectional shape having a radius of 20 to 40 mm and a central angle of 150 to 180 °.   The three-dimensional molded body according to claim 7, wherein the thickness of the curved portion is 0.1 to 1.0 mm.   The three-dimensional molded body according to claim 8, which constitutes a product sample for sales promotion.   The three-dimensional molded product according to claim 9, which is a dummy container arranged in a vending machine. The bending portion,
A large-diameter portion having a substantially cylindrical cross-section formed by dividing a substantially cylindrical surface in the vertical direction, the divided cylindrical surface having a radius of 25 to 40 mm and a central angle of 150 to 180 °.
Forming a divided cylindrical surface obtained by dividing the substantially cylindrical surface in the vertical direction, the divided cylindrical surface having a radius of 12 to 20 mm, and a small-diameter portion having a substantially arc-shaped cross-sectional shape having a central angle of 150 to 180 °;
A substantially conical surface is formed into a divided conical surface obtained by dividing the substantially conical surface in the longitudinal direction, and the divided conical surface has a substantially arc-shaped cross-sectional shape having a central angle of 150 to 180 °. And a tapered part connecting one end,
The three-dimensional molded body according to claim 10, wherein the large-diameter portion, the tapered portion, and the small-diameter portion are formed coaxially, and the tapered portion has an axial length of 15 to 50 mm.   The three-dimensional molded body according to claim 7, wherein the three-dimensional molded body is a molded body obtained by vacuum molding the resin sheet with a UV cured layer into a predetermined shape.   The three-dimensional molded body according to claim 7, which is a molded body obtained by pressure-forming the resin sheet with a UV cured layer into a predetermined shape.   The three-dimensional molded body according to claim 7, which is a molded body obtained by molding the resin sheet with the UV cured layer into a predetermined shape.   The three-dimensional molded body according to claim 7, wherein the molded body is a molded body obtained by molding a plurality of the curved portions at intervals on the one resin sheet with a UV cured layer.   The three-dimensional molded body according to claim 6, wherein the thermoplastic resin sheet is made of a polyethylene terephthalate resin or a polycarbonate resin.   The three-dimensional molded body according to claim 1, wherein the thermoplastic resin sheet is made of a biodegradable resin.   The three-dimensional molded body according to claim 1, wherein the cured layer is formed using four or more colors of UV ink.   The three-dimensional molded body according to claim 1, having a silk print layer above and / or below the cured layer.   The three-dimensional molded body according to claim 1, further comprising a primer layer below the cured layer.   The cured layer contains at least one of 40 to 60% by mass of a urethane acrylate resin, 5 to 20% by mass of an acrylic photoreactive diluent, and 10 to 40% by mass of a colorant based on the whole ink. The three-dimensional molded body according to claim 1, which is a UV cured layer obtained by subjecting the UV ink to UV curing.   The said curved part comprises the division | segmentation cylindrical surface which divided | segmented the substantially cylindrical surface in the longitudinal direction, The divided cylindrical surface has a radius of 20-40 mm, and has a substantially arc-shaped cross-sectional shape of 150-180 degree central angle, Claims. The three-dimensional molded body according to 21.   The three-dimensional molded product according to claim 22, which constitutes a product sample for sales promotion.   24. The three-dimensional molded body according to claim 23, which is a dummy container arranged in a vending machine.

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