JP2005081660A - Decoration structure of resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin molding which can give a rough, strong metallic texture. <P>SOLUTION: The decoration structure of the resin molding gives the metallic texture to the surface of the molding. A transparent ink layer 10 containing a metallic pigment and a specular layer 11 are formed in turn on the back of the transparent or translucent molding. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a decorative structure of a resin molded product having a metallic texture.

  Conventionally, in in-mold molding foil or backside printing after single-sided in-mold molding, a strong metallic texture is sometimes required. And the metallic texture was given to the resin molding by gravure foil using the ink containing a metallic pigment, silk foil, and silk printing.

  In addition, as a resin molded product having a metallic texture, there was a decorated compact container having at least a reflective layer, a light transmitting / refracting layer, and a pattern layer on the surface of the molded product, and having a glossy and deep metallic texture. (For example, patent document 1).

Japanese Patent Publication No. 2002-67082

  However, the conventional resin molded product using gravure foil, silk foil, and silk printing has a problem in that it has a limited brightness and cannot produce a satisfactory product.

  Further, the resin molded product described in Patent Document 1 also has a problem that although the depth is increased, the metallic texture cannot be made rough and strong.

  Then, an object of this invention is to provide the resin molded product which can give a rough and strong metallic texture.

  In order to solve the above problems, a typical resin molded product decorative structure according to the present invention is a resin molded product decorative structure that gives a metallic texture to the surface of the molded product, and is transparent or translucent. A transparent ink layer containing a metallic pigment and a mirror surface layer are sequentially formed on the back surface of the product.

  According to the present invention, a resin molded product having a rough and strong metallic texture can be obtained.

[First Embodiment]
Embodiment of the decoration structure of the resin molded product which concerns on this invention is described using figures. FIG. 1 shows an example of a decorated resin molded product according to this embodiment. As a resin molded product having a metallic texture, there is a panel P of an electronic device display window such as a cosmetic case and a mobile phone. The panel P is a transparent acrylic plate 1a, and a frame 1b is printed around it, leaving a transparent display window 1c for displaying a liquid crystal screen at the center.

  2 and 3 are sectional views of the resin molded product. As shown in FIG. 2 (a), the panel P has a printed layer 13, a transparent ink layer 10, a mirror surface layer 11, and a backing layer 12 in this order on the portion that becomes the frame 1b on the back surface of the transparent or translucent substrate 2. It has a decorative structure that has been printed with a metallic texture. The portion that becomes the display window 1 c is formed of only the base material 2. The base material 2 is formed into a predetermined shape with a transparent acrylic resin.

  The printed layer 13 is formed with a portion where a pattern or the like is printed and a portion where the printing is not performed. The portion where printing is not performed is formed so as to be a display window (see FIG. 1), and the transparent ink layer 10 and the mirror surface layer 11 can be seen.

  The transparent ink layer 10 is formed by printing a transparent or translucent ink containing a metallic pigment such as pearl or aluminum. The metallic pigment contained in the transparent ink layer 10 shines like a glitter and expresses a rough metallic luster. The ink may be colored transparent or colored translucent ink, and Norifane HTR using a transparent pigment with high definition can be used.

  The mirror surface layer 11 is a mirror ink layer formed by printing a mirror surface ink mixed with metal uniformly and smoothly, and is like a mirror having metallic metallic luster. The mirror layer 11 may be an HS layer or a vapor deposition layer formed by vapor deposition of metal.

  The backing layer 12 is formed by backing printing ink such as Noriphan HTR white, and prevents the mirror layer 11 from being oxidized. Further, the backing layer 12 clearly expresses the metallic luster of the transparent ink layer 10 and the mirror surface layer 11 so that the back side of the mirror surface layer 11 is not transparent.

  In this embodiment, the transparent ink layer 10 has a decorative structure in which the mirror surface layer 11 is overlapped. However, as the decorative structure in which a colored transparent ink layer is provided between the transparent ink layer 10 and the mirror surface layer 11. Also good. By providing such a colored transparent ink layer 16 (see FIG. 3), it is possible to add color to the metallic texture and to give variations to the design.

  Moreover, as shown in FIG.2 (b), it is good also as a decorating structure in which the backing layer 12, the mirror surface layer 11, the transparent ink layer 10, and the printing layer 13 were formed in order on the surface of the base material 2. FIG. Further, a UV hard clear layer (not shown) may be formed on the entire uppermost portion to improve the surface hardness of the panel P, and when the print layer 13 is not peeled off or the print layer 13 is omitted. This prevents the transparent ink layer 10 from being peeled off.

  Hereinafter, the manufacturing method of panel P with a decoration concerning this embodiment is explained. As shown in FIGS. 4 to 8, the injection mold includes a fixed mold 3 and a movable mold 4, and a continuous film 7 is provided on the movable mold 4 side between the fixed mold 3 and the movable mold 4. Pass continuously.

  The fixed mold 3 is formed with a sprue forming portion 3a for injecting transparent resin, a cavity 3b, and an introduction path 3c for connecting them. The movable mold 4 has a cavity 4b. The sprue forming part 3 a is connected to the cavity 3 b through the introduction path 3 c, and the cavities 3 b and 4 b are formed in the passage region of the continuous film 7.

  Here, as shown in FIGS. 4 and 5, a winding device 5 is attached to the movable mold 4. The winding device 5 has a feeding roll 5a and a winding roll 5b, and a continuous film 7 is wound between them.

  Each of the continuous films 7 is wound around and held by the feed roll 5a, and the preparation is completed by passing the tip between the fixed mold 3 and the movable mold 4 and winding it around the take-up roll 5b.

  Here, as shown in FIG. 6, the continuous film 7 is formed on a PET base film 8 in that order, a release layer 9 made of a material having no adhesiveness, a backing layer 12, a mirror layer 11, a transparent ink layer 10, and printing. Layer 13 and adhesive layer 14 are laminated. When forming a panel P having a decorative structure in which a colored transparent ink layer 16 (see FIG. 3) is provided between the transparent ink layer 10 and the mirror surface layer 11, the transparent ink layer 10 of the continuous film 7 and A colored transparent ink layer is laminated between the mirror surface layers 11.

  The backing layer 12, the mirror surface layer 11, the transparent ink layer 10, the printing layer 13, and the adhesive layer 14 are formed with a printed portion and a non-printed portion, and the transparent acrylic resin layer is formed on the back surface from the non-printed portion. As a result, the transparent display window (see FIG. 1) is formed. The backing layer 12, the mirror surface layer 11, the transparent ink layer 10, the printing layer 13, and the adhesive layer 14 are formed with a plurality of independent printing patterns at predetermined intervals.

  The continuous film 7 is arranged on the movable mold side so that the adhesive layer 14 faces the cavity 3b. The continuous film 7 is wide and can cover the entire cavities 3b and 4b.

  Then, the winding device 5 is operated to intermittently feed the continuous film 7 between the fixed mold 3 and the movable mold 4. This intermittent feeding operation is controlled so that the printing pattern of the continuous film 7 always coincides with the cavities 3 b and 4 b of the fixed mold 3 and the movable mold 4.

  Next, the resin injection process will be described. As shown in FIGS. 4 and 5, the winding device 5 is operated to intermittently feed the continuous film 7 between the fixed mold 3 and the movable mold 4. Then, the printing pattern of the continuous film 7 is stopped at the positions of the cavities 3b and 4b on the downstream side in the moving direction of the continuous film 7, and the fixed mold 3 and the movable mold 4 are combined and closed as shown in FIG. .

  After the fixed mold 3 and the movable mold 4 are combined, a transparent resin is injected into the sprue forming portion 3a. The injected transparent resin is filled in the cavities 3b and 4b while urging the continuous film 7 toward the movable mold 4 side. At this time, printing with a metallic texture applied to the mirror surface layer 11 and the transparent ink layer 10 of the continuous film 7 or a pattern printed on the printing layer 13 is transferred to the injected resin surface.

  As shown in FIG. 8, after the resin is cured, the fixed mold 3 and the movable mold 4 are opened. Then, the molded product 21 in which the resin remaining on the fixed mold side is cured is sucked and taken out by a vacuum type take-out machine (not shown). At this time, the cured resin is adhered to the adhesive layer 14 of the continuous film 7, and the molded product 21 and the continuous film 7 are separated by the release layer 9 of the continuous film 7 together with the removal of the molded product 21. 7 backing layer 12, mirror surface layer 11, transparent ink layer 10, printing layer 13, and adhesive layer 14 are peeled from continuous film 7. Thereafter, the sprue formed on the sprue forming portion 3a is cut off from the molded product 21 to form the resin molded product P.

  In the present embodiment, the continuous film 7 passes through the movable mold 4 side, but may pass through the fixed mold 3 side. Moreover, you may use the continuous film 7 for the metal mold | die in which the several cavity was formed.

  As described above, the transparent ink layer 10 containing the metallic pigment and the mirror surface layer 11 were sequentially formed on the back surface of the transparent or translucent molded article 21. As a result, as shown in FIG. 3, the metallic pigment contained in the transparent ink layer 10 glitters like a glitter, expresses a rough metallic luster, the mirror surface layer 11 expresses a metallic metallic luster, and the mirror surface layer 11 The light reflected by the lens collides with the metallic pigment and is diffusely reflected. For this reason, the reflection of light by the metallic pigment of the transparent ink layer 10 and the mirror surface layer 11 affects each other, the roughness of the metallic texture increases, and the brightness and metallic texture become very strong.

  Moreover, by using the continuous film 7 having a metallic texture and forming the panel P by an in-mold method, the panel P having a metallic texture can be easily formed simply by performing injection molding. The manufacturing process can be omitted and the manufacturing cost can be reduced.

It is a perspective view of the resin molded product of this embodiment. It is sectional drawing of a resin molded product. It is sectional drawing of a resin molded product. It is explanatory drawing of the step which makes a continuous film pass continuously between a fixed metal mold | die and a movable metal mold | die. It is a top view in the state where the continuous film was continuously passed between the fixed mold and the movable mold. It is sectional drawing of another continuous film. It is sectional drawing of a fixed mold and a movable mold in the state where a mold was closed. It is sectional drawing of a fixed mold and a movable mold in the state where a mold was opened.

Explanation of symbols

A ... Light intensity printing P ... Panel 1a ... Plate body 1b ... Frame 1c ... Display window 2 ... Base material 3 ... Fixed mold 3a ... Sprue forming part 3b ... Cavity 3c ... Introduction path 4 ... Movable mold 4b ... Cavity 5 ... Winding device 5a ... Sending roll 5b ... Winding roll 7 ... Continuous film 8 ... Base film 9 ... Release layer
10 ... Transparent ink layer
11 Mirror surface layer
12 ... backing layer
13… Printing layer
14… Adhesive layer
15… Hard clear layer
16 ... ink layer
21… Molded product

Claims (3)

A decorative structure of a resin molded product that gives a metallic texture to the surface of the molded product,
A decorative structure of a resin molded product, wherein a transparent ink layer containing a metallic pigment and a mirror surface layer are sequentially formed on the back surface of the transparent or translucent molded product. A decorative structure of a resin-formed product that gives a metallic texture to the surface of the molded product,
A decorative structure of a resin molded product, wherein a mirror surface layer and a transparent ink layer containing a metallic pigment are sequentially formed on the surface of the molded product. A decorative structure for a resin molded product according to claim 1 or 2,
The decorative structure of a resin molded product, wherein the decorative structure is formed by an in-mold method using a continuous film in which at least a transparent ink layer containing a metallic pigment and a mirror surface layer are formed on a base sheet.

Images