JP2009028986A - Method for producing decorative shaped article, and decorative shaped article obtained thereby - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an excellent decorative shaped article capable of simply forming a beautiful watermark pattern with a cubic effect at a low cost, and to provide a decorative shaped article obtained thereby. <P>SOLUTION: The surface of a transparent layer 6 composing a cover body 4 of a compact vessel is irradiated with a CO<SB>2</SB>laser, so as to form a recessed pattern P', thereafter, a thin film layer 7 is formed on the surface thereof, and, the thin film layer 7 is irradiated with a YAG laser, and this layer is partially subjected to removal working, so as to form a watermark pattern P. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a decorative molded body having a special watermark pattern on at least a part of a molding surface, and a decorative molded body obtained thereby.

  A compact container, a lipstick container, and the like that contain cosmetics are required not only to have functionality but also to have a good design and a design that reflects the product image. As a technique that meets such requirements, for example, a technique is disclosed in which a decorative film is integrated with a lid of a compact container without using an adhesive (see Patent Document 1).

In addition, a technique is disclosed in which a thin film layer provided on the front and back surfaces of the lid is irradiated with a laser, and a watermark pattern of a pattern composed of fine lines and dots is formed on the thin film layer (Patent Literature). 2 and 3).
JP 2001-292828 A JP 2006-34623 A JP 2006-334122 A

  However, as in the above-mentioned Patent Document 1, there is a problem in that a decorative film is deteriorated in appearance, worn or damaged over time, and looks bad. In addition, as in Patent Document 2 described above, a fine watermark pattern formed with a laser is beautiful and excellent in durability, but the pattern has no three-dimensional effect or shadow, and the pattern tends to be monotonous. There is.

  On the other hand, the thing of the said patent document 3 is combining the fine watermark pattern and uneven | corrugated pattern which are formed with a laser, there exists a three-dimensional effect, and it is very interesting. However, it is necessary to give a fine uneven shape to the watermark pattern formation part in advance in in-mold transfer molding, etc., and each time the pattern design changes, a different uneven shape transfer sheet is used. Therefore, there is a problem that the process is complicated and the manufacturing cost is increased. In addition, there is a problem that it is impossible to provide a product designed according to the customer's needs in a short time or to cope with a sudden specification change.

  The present invention has been made in view of such circumstances, and can be obtained at a low cost and easily by a method for producing an excellent decorative molded body capable of forming a beautiful three-dimensional watermark pattern. The purpose is to provide a decorative molded body.

In order to achieve the above object, the present invention comprises a step of preparing a molded body having a transparent layer made of a transparent member, and a surface of the transparent layer is partially irradiated with a CO ₂ laser on one side of the transparent layer. A step of forming a concave pattern by removing, a step of laminating and forming a non-transparent thin film layer on the concave pattern forming surface of the transparent layer, and irradiating a part of the surface of the non-transparent thin film layer with a YAG laser And removing the non-transparent thin film layer to expose at least part of the concave pattern formed on the transparent layer to form a watermark pattern. The manufacturing method is the first gist.

In addition, the present invention particularly forms a linear or dotted melt removal trace having a width of 25 to 100 μm on the surface of the transparent layer by irradiation with the CO ₂ laser, thereby forming a concave pattern. The manufacturing method of the decorative molded body made in the second gist, a colored layer is provided directly or via a gap on the surface of the transparent layer opposite to the non-transparent thin film layer forming surface, from the watermark pattern, A method for producing a decorative molded body in which the color of the colored layer can be seen through is a third gist.

And this invention is a decoration molded body obtained by the manufacturing method of the decoration molded body which is the said 1st summary, Comprising: It laminates | stacks and forms in the transparent layer which consists of a transparent member, and at least one part of the said transparent layer one side. A part of the non-transparent thin film layer is removed by irradiation with a YAG laser so that the transparent layer under the part is exposed, and at least one of the exposed portions of the transparent layer is exposed. A fourth aspect is a decorative molded body in which a concave pattern formed by partially removing the surface of the transparent layer by irradiation with a CO ₂ laser is formed in the part, and the part is a watermark pattern.

In addition, the present invention particularly forms a linear or dotted melt removal trace having a width of 25 to 100 μm on the surface of the transparent layer by the irradiation of the CO ₂ laser, thereby forming a concave pattern. The decorative molded body is a fifth gist, and a colored layer is provided directly or through a gap on the surface of the transparent layer opposite to the surface on which the non-transparent thin film layer is formed. A decorative molded body in which the color of the colored layer can be seen through is defined as a sixth aspect.

In the present invention, a transparent layer is first irradiated with a CO ₂ laser to give a concave pattern, and after forming a non-transparent thin film layer on the concave pattern forming surface, a part thereof is irradiated with a YAG laser. The concave pattern below is exposed. Accordingly, there is no need to form a three-dimensional pattern (concave pattern) using a mold as in the conventional case, and removal processing by CO ₂ laser irradiation, non-transparent thin film layer formation, and YAG are performed on a single shaped molding surface. A three-dimensional watermark pattern can be formed easily and in a short time by simply performing removal processing by laser irradiation sequentially. For this reason, it is possible to provide a product designed according to the needs of the customer in a short time or to cope with a sudden specification change. In addition, the watermark pattern obtained in the present invention has a very clear boundary with the non-transparent portion, and can give a clear impression.

It is also possible to first form a non-transparent thin film layer on one side of the transparent layer, partially remove it by YAG laser irradiation, and form a concave pattern by irradiating the removed portion with CO ₂ laser. However, a part of the melted resin may remain at the removal edge in the case of the melt removal trace due to the CO ₂ laser irradiation, and the boundary edge between the melt removal trace and the non-removal part is smaller than that in the YAG laser irradiation. In order to obtain a clear boundary line because it does not become a sharp line, the removal process by CO ₂ laser irradiation, the formation of a non-transparent thin film layer, and the removal process by YAG laser irradiation are performed in this order as in the present invention. It is important to do. In addition, there is an advantage that a more complicated watermark pattern can be formed by leaving a part of the non-transparent thin film layer on the concave pattern during the removal processing by the YAG laser irradiation.

And among the decorative molded bodies of the present invention, in particular, by irradiation with the CO ₂ laser, a linear or dotted melt removal trace having a width of 25 to 100 μm is formed on the surface of the transparent layer, thereby forming a concave pattern. What is formed can give a fine pattern that could not be realized by conventional shaping using a mold or a film with a concavo-convex pattern. Obtainable.

  Among the decorative molded bodies of the present invention, in particular, a colored layer is provided directly or via a gap on the surface of the transparent layer opposite to the surface on which the non-transparent thin film layer is formed. Therefore, what the color of the colored layer can be seen through becomes more interesting because the watermark is also colored.

  Next, the best mode for carrying out the present invention will be described. However, the present invention is not limited to the following embodiments.

  FIG. 1 is a perspective view of a compact container that is the best mode for carrying out the present invention, and FIG. 2 is a sectional view taken along line XX ′. In these drawings, reference numeral 1 denotes a main body portion, and a cosmetic material such as a foundation is accommodated and held in a concave portion 2 provided on the left side toward the inside thereof. Further, a puff for applying cosmetics to the skin is accommodated and held in the recess 3 provided on the right side.

  Reference numeral 4 denotes a lid that covers the upper opening of the main body 1, and is pivotably attached to the rear end of the main body 1 by a hinge connection (not shown) with the main body 1. As shown by the chain line in FIG. 1, it opens upward. A mirror 5 is attached to the inner surface of the lid 4.

  The lid 4 includes a transparent layer 6 made of a transparent acrylic resin molded body and a non-transparent thin film layer 7 (hereinafter simply referred to as “thin film layer”) made of a half mirror-like metallic luster layer formed on the surface thereof. A part of the thin film layer 7 is removed by a special method described below to expose the transparent layer 6, and a shading watermark pattern P is given. A part of the watermark pattern P is shown in FIG. FIG. 3B is an enlarged view thereof.

  The watermark pattern P can be obtained, for example, as follows. That is, first, a mold for shaping the transparent layer 6 serving as the base of the lid body 4 is prepared, and a transparent acrylic resin material, which is a material for forming the transparent layer 6, is injection-molded, whereby FIG. As shown in FIG. 3, the transparent layer 6 having a predetermined shape can be obtained.

Next, as shown in FIG. 4A, the surface of the transparent layer 6 is partially removed by irradiating the transparent layer 6 in the region of the thin film layer 6 where the watermark pattern P is to be formed with a CO ₂ laser. Thus, the concave pattern P ′ is formed. In this example, on the surface of the thin film layer 6, a fine geometric pattern (see FIG. 3) composed of a linear melt-removal trace is formed on the strip-shaped portion (see FIG. 1) arranged in a cross shape, thereby forming a concave pattern. P 'is formed.

Then, as shown in FIG. 5 (a), after forming the thin film layer 7 made of a half mirror-like metallic luster layer by aluminum vapor deposition on the entire surface including the concave pattern P 'formation portion of the transparent layer 6, As shown in FIG. 5 (b), a YAG laser is irradiated on the concave pattern P ′ forming surface, and a linear melt removal trace formed by a CO ₂ laser is formed on the thin film layer 7 covering the concave pattern P ′. Remove the matching part. Thereby, the concave pattern P ′ formed in the transparent layer 6 under the thin film layer 7 is exposed, and the watermark pattern P can be formed.

  According to this configuration, the watermark pattern P arranged in a cross shape on the lid 4 is configured by a fine geometric pattern line (indicated by Q in FIG. 3B) and surrounded by the line. Since the fine partition portion (indicated by R in FIG. 3B) remains without removing the thin film layer 7 made of the metallic luster layer, a very delicate and beautiful watermark pattern P can be obtained.

  Moreover, since the watermark pattern P is three-dimensional, it can be obtained without using a mold by combining two types of laser irradiation, so that the manufacturing effort and cost can be greatly reduced. Can do. Since the watermark pattern P with a completely different impression can be given by appropriately combining the laser irradiation setting conditions, the color of the thin film layer 7, etc., a wide variety of products can be delivered in a short period of time. Has the advantage of being able to. The watermark pattern P is formed with a clear line at the boundary with the non-transparent portion, and can give a very clear impression.

  In the above example, the transparent member constituting the transparent layer 6 of the lid 4 may be any transparent member as long as it is conventionally used for molded products such as containers. Other examples include polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) resin, polycarbonate (PC), and the like. These must be transparent in order to show the shadow of the watermark P, but they need not be colorless, and even if they are slightly colored, there is no problem as long as the opposite side can be seen through.

Further, since the impression of the melt removal trace caused by the CO ₂ laser irradiation is somewhat different depending on the type of the resin member constituting the transparent layer 6, it is possible to select the type of resin member corresponding to the concave pattern P ′ to be applied. desirable. For example, if a resin such as polymethyl methacrylate (PMMA), PC, or polyethylene terephthalate (PET) is used, the notch of the recess in the melt removal trace becomes a relatively sharp edge. When the concave pattern P ′ is applied, it is preferable to use these resins. When a resin such as ABS or polypropylene (PP) is used, a relatively gentle line is formed because the recess of the melt removal trace is gently cut and the corner around the recess is slightly raised. Therefore, when a concave pattern P ′ having a gentle impression design is applied, it is preferable to use these resins.

  Note that the design of the watermark pattern P obtained by removing the thin film layer 7 laminated on the concave pattern P ′ by YAG laser irradiation follows the design of the concave pattern P ′ as in the above example. It may be a thing, or it may be made to give a different impression by shifting the part to expose intentionally.

  On the other hand, as the thin film layer 7 formed on the surface of the transparent layer 6, in the above example, a half-mirror-like metallic luster layer formed by aluminum deposition is used, but the material is not particularly limited. Any thin film layer 7 conventionally used for decorating a molded body may be used. However, in contrast to the transparent layer 6, it must be non-transparent, and various materials such as a hologram sheet, a metal foil, a metal vapor deposition layer, and a paint coating film are used in addition to a colored film (sheet). And the formation method employ | adopts an appropriate method according to the materials, such as vapor deposition, sputtering, plating, a hot stamp, coating. “Non-transparent” means that when the removed portion and the non-removed portion of the thin film layer 9 are compared, it is not transparent so that it can be recognized that there is a difference in appearance. ""

  The color of the thin film layer 7 is preferably a color having a metallic luster, as described above, because the impression is strong in comparison with the watermark pattern P.

Further, in the above example, as shown in FIG. 3 (b), during the removal process of the thin-film layer 7 by YAG laser, the underlying performs removing processing by tracing a line Q of the molten removing traces by CO ₂ laser The fine partition portion R surrounded by the line Q is left without removing the thin film layer 7. For example, as shown in FIG. 6, in a certain region where the watermark pattern P is to be formed, By removing the thin film layer 7 completely, the concave pattern P ′ composed of the melt removal mark by the CO ₂ laser may be exposed as it is.

The width of the concave shape when forming the concave pattern P ′ by irradiation with the CO ₂ laser is not particularly limited, but can be realized by normal molding using a mold or molding using a transfer sheet. A pattern that is difficult to form by concave processing with a width of 25 to 100 μm and a depth of 25 to 500 μm is preferable because it is within the range showing the superiority of the present invention. In particular, it is designed to form a fine concave pattern by continuously or intermittently forming a linear or dotted (or a combination thereof) melt removal trace having a width of 25 to 100 μm. It is particularly suitable for the top and processing efficiency. Note that the removal width by the YAG laser irradiation performed next is appropriately set together with the concave pattern P ′ by the CO ₂ laser irradiation.

  In the above example, the color or the like of the contents stored in the container below the watermark pattern P can be seen directly. For example, as shown in FIG. A colored layer 10 may be provided on the back side of the transparent layer P so that the color of the colored layer 10 can be seen through the watermark pattern P. In this way, since many different colors can be combined as colors that can be seen from the watermark pattern P, variations in impressions can be enriched.

  The material of the colored layer 10 is not particularly limited, and in addition to the colored layer transferred from the colored transfer sheet, a metal foil, a hologram foil, etc., a coating layer by coating, a vapor deposition layer, a colored layer by in-mold molding And so on. The color is not limited to a single color and may be a color pattern composed of two or more colors.

  As a compact container, in a type in which a partition plate 11 is provided between the lid 4 and the main body 1, for example, as shown in FIG. 8, the colored layer 10 is formed on the upper surface of the partition plate 11. It does not matter even if it is formed. In that case, the colored layer 10 may be coated with a colored paint, or may be transferred by a colored transfer sheet or the like. Of course, the partition plate 11 itself may be made of a colored resin to form the colored layer 10.

  Furthermore, the colored layer 10 is not formed integrally with the partition plate 11, but, for example, as shown in FIG. 9, a colored sheet (material is not particularly limited) 10 ′, the partition plate 11 and the lid 4 You may just put between. In this case, the colored sheet 10 ′ functions as the colored layer 10.

  In these examples, the present invention is applied to a compact container. However, the molded body to which the present invention is applied is not limited to the container, and various resin molded bodies, or other members are combined with the resin molded body. The molded body is not particularly limited. For example, it can be widely applied to mobile phones, stationery, home appliances, various cases, and the like.

It is a perspective view of one Example of this invention. It is XX 'sectional drawing of FIG. (A) is explanatory drawing of the watermark pattern in the said Example, (b) is the enlarged view. (A), (b) is explanatory drawing of the formation method of the watermark pattern in the said Example. (A), (b) is explanatory drawing of the formation method of the watermark pattern in the said Example. It is explanatory drawing of the formation method of the watermark pattern in the said Example. It is explanatory drawing of the other Example of this invention. It is explanatory drawing of other Example of this invention. It is explanatory drawing of the other Example of this invention.

Explanation of symbols

4 Lid 6 Transparent layer 7 Thin film layer P Watermark pattern

Claims (6)

A step of preparing a molded body having a transparent layer made of a transparent member, a step of irradiating a CO ₂ laser to one side of the transparent layer, and partially removing the transparent layer surface to form a concave pattern; A step of laminating and forming a non-transparent thin film layer on the concave pattern forming surface of the transparent layer, and irradiating a part of the surface of the non-transparent thin film layer with a YAG laser to remove the non-transparent thin film layer And a step of forming a watermark pattern by exposing at least a part of the concave pattern formed in the transparent layer underneath, a method for producing a decorative molded body. The decorative molded body according to claim 1, wherein a linear or dotted melt removal trace having a width of 25 to 100 µm is formed on the surface of the transparent layer by irradiation with the CO ₂ laser, thereby forming a concave pattern. Manufacturing method.   A colored layer is provided directly or via a gap on the surface of the transparent layer opposite to the surface on which the non-transparent thin film layer is formed, so that the color of the colored layer can be seen through the watermark pattern. The manufacturing method of the decorative molded object of 2 description. A decorative molded body obtained by the manufacturing method according to claim 1, comprising a transparent layer made of a transparent member, and a non-transparent thin film layer laminated on at least a part of one side of the transparent layer, and the non-transparent A part of the thin film layer is removed by irradiation with the YAG laser, and the transparent layer below it is exposed. At least a part of the exposed portion of the transparent layer is exposed to the surface of the transparent layer by irradiation with the CO ₂ laser. A decorative molded body characterized in that a concave pattern formed by partial removal processing is formed, and that part is a watermark pattern. The decorative molded body according to claim 4, wherein a linear or dotted melt removal trace having a width of 25 to 100 µm is formed on the surface of the transparent layer by irradiation with the CO ₂ laser, thereby forming a concave pattern.   A colored layer is provided directly or via a gap on the surface of the transparent layer opposite to the non-transparent thin film layer forming surface, so that the color of the colored layer can be seen through the watermark pattern. The decorative molded body according to claim 4 or 5.

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