JP2006305898A - Method for producing resin molding and resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a resin molding which can maintain a sharp uneven pattern although a protective layer is formed on its surface when a decorative layer with the uneven pattern is formed on the surface of the molding by using a decorating transfer film having an uneven pattern layer and the resin molding produced by using the method. <P>SOLUTION: An ultraviolet curable resin layer 3 and an ink layer 4 are formed in turn on one side of a flexible film substrate 1, and the decorating transfer film 5 with the uneven pattern layer 2 formed for applying the uneven pattern to the ultraviolet curable resin layer is formed on the opposite side of the flexible film substrate. The transfer film is arranged in a cavity 6. Next, a resin is packed in the cavity, and in-mold molding is carried out. After that, the uneven pattern layer and the flexible film substrate are peeled off to produce the resin molding 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  When forming a decorative layer with a concavo-convex pattern on the surface of a resin molded product using a decorative transfer film having a concavo-convex pattern layer, the present invention provides a sharp concavo-convex pattern while providing a protective layer on the surface. The present invention relates to a method for producing a resin molded product capable of maintaining the above and a resin molded product produced using the method.

  The thing disclosed by patent document 1 is known as a transfer film for decorating which can form a decorative layer with a concavo-convex pattern on the surface of a resin molded product that is highly decorative and mass-produced such as a compact container. Yes.

In Patent Document 1, in a transfer sheet in which a release layer, an ink layer, and an adhesive layer are sequentially provided on one side of a base sheet, insert molding in which an uneven pattern layer having a thickness of 5 μm or more is provided on the other side of the base sheet. Transfer sheet. According to this, a resin molded product having a decorative layer (ink layer) with various uneven patterns using a single mold by using a transfer sheet provided with various uneven pattern layers. Can be manufactured.
Japanese Utility Model Publication No. 63-43118

  By the way, it is conceivable to provide a protective layer of an ultraviolet curable resin on the ink layer with a concavo-convex pattern applied to the resin molded product as in the above background art in order to prevent the ink layer from peeling off. In the case of providing a protective layer of an ultraviolet curable resin, it is usual to separately provide a coating with an ultraviolet curable resin on the ink layer with a concavo-convex pattern applied as in the background art. The coating of the ultraviolet curable resin is formed by first applying a liquid ultraviolet curable resin with a predetermined thickness and then irradiating the ultraviolet ray to cure it. In this case, liquid UV-curing trees accumulate in the corners such as peaks and valleys of the concavo-convex pattern, and these corners are rounded, resulting in a sharp concavo-convex pattern. It was not possible to form a decorative layer with an uneven pattern. In particular, due to the relationship with the pattern due to the ink layer, when it is desired to express a particularly sharp concavo-convex feeling, this cannot be achieved, which is inconvenient.

  The present invention was devised in view of the above-described conventional problems, and when a decorative layer with a concavo-convex pattern is formed on the surface of a resin molded article using a decorative transfer film having a concavo-convex pattern layer, It aims at providing the manufacturing method of the resin molded product which can maintain a sharp uneven | corrugated pattern, providing a protective layer on the surface, and the resin molded product manufactured using this.

  In the method for producing a resin molded product according to the present invention, an ultraviolet curable resin layer and an ink layer are sequentially formed on one side of a flexible film substrate, and on the opposite side of the flexible film substrate. , Creating a decorative transfer film having a concavo-convex pattern layer for applying a concavo-convex pattern to the ultraviolet curable resin layer, disposing the decorative transfer film in the cavity, and then placing the resin into the cavity The resin molded product is manufactured by performing in-mold molding by filling the substrate and then peeling the concavo-convex pattern layer and the flexible film substrate.

  In addition, the resin molded product according to the present invention includes the ink layer and the concavo-convex pattern layer that protects the ink layer on the surface of the resin molded product using the method for producing a resin molded product according to claim 1. And the ultraviolet curable resin layer provided with a concavo-convex pattern is formed.

  In the method for producing a resin molded product according to the present invention, when a decorative layer with a concavo-convex pattern is formed on the surface of a resin molded product using a decorative transfer film having a concavo-convex pattern layer, It is possible to maintain a sharp concavo-convex pattern while providing a protective layer.

  Moreover, in the resin molded product concerning this invention, it becomes possible to maintain a sharp uneven | corrugated pattern, although a protective layer is provided in the surface in which the decorative layer with an uneven | corrugated pattern was formed.

  Hereinafter, a preferred embodiment of a method for producing a resin molded product according to the present invention and a resin molded product produced using the same will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1, 3 and 4, the method for producing a resin molded product according to the present embodiment basically includes an ultraviolet curable resin layer 3 sequentially on one side of the flexible film substrate 1, In addition to forming the ink layer 4 and the like, a decorative transfer film 5 is formed on the opposite side of the flexible film substrate 1 by forming the uneven pattern layer 2 for applying an uneven pattern to the ultraviolet curable resin layer 3. Then, this decorative transfer film 5 is disposed in the cavity 6, and then the resin is filled in the cavity 6 to perform in-mold molding, and then the concavo-convex pattern layer 2 and the flexible film substrate 1 are formed. The resin molded product 7 is manufactured by peeling.

  Specifically, first, a decorative transfer film 5 is prepared. The flexible film substrate 1 is formed using a synthetic resin such as polyethylene terephthalate as a raw material, and the uneven pattern layer 2 is formed on one surface thereof by direct printing. As a printing method, silk printing capable of obtaining a thick printing surface or printing using an inkjet printer is employed. In particular, in the case of an inkjet printer, printing with an ultraviolet curable resin is performed to form the concavo-convex pattern layer 2. In particular, according to printing by silk printing or ink jet printer, the concavo-convex pattern layer 2 forming various different concavo-convex patterns is sequentially printed in small amounts successively in the length direction of the flexible film substrate 1. be able to. Further, particularly in the present embodiment, as shown in FIG. 1, the peaks of the concavo-convex portions 2 a and 2 b forming the concavo-convex pattern layer 2 (the concave portion 2 a is actually the surface of the flexible film substrate 1). The corner portions 2c and 2d of the valley are not rounded and formed sharply.

  A release layer 8 is first formed on the flexible film substrate 1 on the other surface of the decorative transfer film 5 and the surface facing the resin molded body 12 to be described later in the cavity 6. A sheet-like ultraviolet curable resin layer 3 is formed, an ink layer 4 on which various designs are drawn is further formed, and finally an adhesive layer 9 is formed thereon. Even on the other surface of the decorative transfer film 5, various kinds of ink layers 4 of various designs are sequentially printed little by little in the length direction of the flexible film substrate 1 by various printing methods. be able to. As described above, the decorative transfer film 5 is formed. In this embodiment, the decorative transfer film 5 is prepared by being wound in a roll form for mass production.

  Here, the ink layer 4 includes ink A and ink B having different colors. In the present embodiment, the ink A is placed at the position of the concave portion 2a of the concavo-convex pattern layer 2, and the ink B is placed at the position of the convex portion 2b. The ink pattern and the concavo-convex pattern are synchronized with each other. The relationship between the ink pattern and the concavo-convex pattern does not necessarily have to be synchronized as in the present embodiment, and may be formed separately from each other. In this embodiment, the ink A and the ink B are printed to the same thickness, and each layer on the other surface of the decorative transfer film 5 other than the ink layer 4, that is, a release layer 8. Since the ultraviolet curable resin layer 3 and the adhesive layer 9 have a certain thickness, these layers 8, 3, 4 and 9 are laminated in parallel with each other without any unevenness. .

  Next, the decorative transfer film 5 is disposed in the cavity 6. The mold equipment for forming the cavity 6 is composed of a movable mold 10 and a fixed mold 11, and these molds are clamped by bringing the fixed mold 11 into contact with and separating from the movable mold 10. A cavity 6 is formed between the molds 10 and 11. Therefore, the movable mold 10 forms one surface 6 a of the cavity 6, and the fixed mold 11 forms the other surface 6 b of the cavity 6. In the decorative transfer film 5, the concave / convex pattern layer 2 on one surface faces one surface 6 a of the cavity 6, and each layer on the other surface of the decorative transfer film 5, that is, the release layer 8, an ultraviolet curable resin. The layer 3, the ink layer 4, and the adhesive layer 9 are disposed so as to face the inner space of the cavity 6. Resin is injected into the cavity 6 from a port 11 a formed in the fixed mold 11.

  A feeding mechanism 10a and a winding mechanism 10b are respectively provided at both ends of the movable mold 10, and the decorative transfer film 5 is wound around the feeding mechanism 10a and the winding mechanism 10b. The roll-shaped decorative transfer film 5 is carried on the movable mold 10 and is continuously fed out toward the cavity 6 sequentially by the feeding mechanism 10a and the winding mechanism 10b.

  Next, the fixed mold 11 in a released state is clamped with respect to the movable mold 10, and the resin is filled into the cavity 6 from the port 11a of the fixed mold 11, thereby performing in-mold molding and resin. The molded body 12 is molded. The resin may be transparent or colored and opaque depending on the texture of the intended resin molded product 7. When the resin is filled in the cavity 6, the resin spreads along the decorative transfer film 5 to the movable mold 10, and a plate-shaped resin molded body that is molded in the mold facility by a single resin filling operation. The adhesive layer 9, the ink layer 4, and the ultraviolet curable resin layer 3 of the decorative transfer film 5 are transferred to the surface of the 12 movable mold 10 side.

  At this time, when the resin is filled in the cavity 6, not only the convex portion 2 b but also the concave portion 2 a of the concavo-convex pattern layer 2 of the decorative transfer film 5 closely adheres to one surface 6 a of the cavity 6. As a result, each layer on the opposite side of the decorative transfer film 5, that is, the release layer 8, the ultraviolet curable resin layer 3, the ink layer 4, and the adhesive layer 9 has the same shape as the convex portion 2 b at a position corresponding to the convex portion 2 b. It protrudes and faces the resin molded body 12 (see FIG. 4). At that time, reflecting the fact that the corners 2c and 2d of the concavo-convex portions 2a and 2b are formed sharply, the corners of the corresponding layers 8, 3, 4, and 9 corresponding to this also have a sharp shape. Protruding.

  In this way, the surface of the resin molded product 7 is such that, when viewed from the outside, the position of the convex portion 2b of the concave / convex pattern layer 2 becomes a concave portion, and the position of the concave portion 2a of the concave / convex pattern layer 2 becomes a convex portion. The surface of the molded body 12, the adhesive layer 9, the ink layer 4, and the ultraviolet curable resin layer 3 transferred thereon are molded, and the surface of the resin molded product 7 is formed as a striped uneven pattern as a whole. At that time, the ink A is decorated at the position of the convex part on the surface of the resin molded product 7 and the ink B is decorated at the position of the concave part, resulting in a striped color pattern synchronized with the concave-convex pattern. A decorative layer with a concavo-convex pattern is formed.

  Thereafter, when the molding operation is completed, the fixed mold 11 is released from the movable mold 10. Under the present circumstances, the uneven | corrugated pattern layer 2 and the flexible film base material 1 of the transfer film 5 for decoration are peeled from the resin molding 12 through the peeling layer 8. FIG. Thereafter, the surface of the resin molded body 12 is irradiated with ultraviolet rays to cure the ultraviolet curable resin layer 3. As a result, as shown in FIGS. 2, 5, and 6, the surface of the decorative layer with the concavo-convex pattern formed on the surface of the resin molded body 12 is covered and protected by the transparent ultraviolet curable resin layer 3. Will be. Here, in the ultraviolet curable resin layer 3 formed on the outermost side of the decorative layer, the corner portions 3a and 3b of the peaks and valleys thereof are included in the corner portions of the concavo-convex pattern layer 2 as described above. Reflects the shape as it is and is sharply formed. The resin molded product 7 manufactured in this way is mass-produced by injection molding with the same mold equipment while sequentially sending the decorative transfer film 5 to the cavity 6.

  As described above, in the method of manufacturing the resin molded product 7 according to the present embodiment, the ultraviolet curable resin layer 3 and the ink layer 4 are sequentially formed on one side surface of the flexible film substrate 1. At the same time, a decorative transfer film 5 in which a concavo-convex pattern layer 2 for applying a concavo-convex pattern to the ultraviolet curable resin layer 3 is formed on the opposite side surface of the flexible film substrate 1 is created. 5 is disposed in the cavity 6, and then the resin is filled in the cavity 6 to perform in-mold molding. Thereafter, the concavo-convex pattern layer 2 and the flexible film substrate 1 are peeled off to form a resin molded product 7. Since it was manufactured, when forming a decorative layer with a concavo-convex pattern on the surface of the resin molded product 7 using the decorative transfer film 5 having the concavo-convex pattern layer 2, UV curable properties that protect the surface While providing the resin layer 3, the shear layer It is possible to maintain an uneven pattern.

  Therefore, in the resin molded product 7 according to the present embodiment, the sharp concavo-convex pattern is maintained while the ultraviolet curable resin layer 3 for protecting the surface on which the decorative layer with the concavo-convex pattern is formed is provided. It becomes possible to do.

  In FIG. 7, FIG. 8, the sectional side view of the surface part of the modification of the transfer film 5 for decoration and the resin molded product 7 manufactured using the transfer film 5 for decoration of the said modification is shown. . The description of the same configuration as that in the above embodiment is omitted. In this modification, when the ink layer 4 is printed, the ink layer 4 composed of the ink A and the ink B is not printed at a time, but the ink B is first cured with the ultraviolet ray of the decorative transfer film 5. The ink A is printed over the entire surface of the conductive resin layer 3 and then over the entire surface. Therefore, in the state where the decorative transfer film 5 is formed, the layer of the ink A and the adhesive layer 9 are raised in a convex shape by the thickness of the ink B. Here, the ultraviolet curable resin layer 3 forming the surface of the resin molded product 7 is formed in a flat layer having no irregularities as in the above-described embodiment, and the resin molded product 7 finally obtained is apparently The color and the unevenness are exactly the same as in the above embodiment. Although the point of difference is not apparent, the adhesive layer 9 is only present in the above embodiment below the portion where the ink B is decorated, but the ink A layer is also present in this modification. It is that you are doing.

It is a sectional side view which shows the transfer film for decoration applied to suitable one Embodiment of the manufacturing method of the resin molded product concerning this invention. It is a sectional side view which shows the surface part of the resin molded product manufactured using the transfer film for decoration of FIG. It is a sectional side view which shows the state which has arrange | positioned the transfer film for decoration to the metal mold | die equipment applied to suitable one Embodiment of the manufacturing method of the resin molded product concerning this invention. It is side sectional drawing which shows the state which filled the resin with the metal mold | die equipment applied to suitable one Embodiment of the manufacturing method of the resin molded product concerning this invention. It is a perspective view which shows an example of the resin molded product manufactured by the manufacturing method of the resin molded product concerning this invention. FIG. 6 is a side sectional view of FIG. 5. It is a sectional side view which shows the modification of the transfer film for decoration. It is a sectional side view which shows the surface part of the resin molded product manufactured using the transfer film for decoration of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible film base material 2 Uneven pattern layer 3 Ultraviolet curable resin layer 4 Ink layer 5 Transfer film for decoration 6 Cavity 7 Resin molded product

Claims (2)

  An ultraviolet curable resin layer and an ink layer are sequentially formed on one side of the flexible film substrate, and an uneven pattern is given to the ultraviolet curable resin layer on the opposite side of the flexible film substrate. To create a decorative transfer film having a concavo-convex pattern layer, arrange the decorative transfer film in a cavity, then fill the cavity with resin and perform in-mold molding, A method for producing a resin molded product, characterized in that a resin molded product is produced by peeling the concavo-convex pattern layer and the flexible film substrate.   The ultraviolet curable product having a concavo-convex pattern provided on the surface of the resin molded product by the method for producing a resin molded product according to claim 1, wherein the ink layer and the concavo-convex pattern layer are provided to protect the ink layer. A resin molded product in which a resin layer is formed.

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