JP2007216417A - Manufacturing method of molded body with pattern and molded body with pattern obtained thereby - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method of a molded body with a pattern, in which no formation of a coloring layer and a covering layer in the order named is necessary, in addition, no peeling off of a portion consisting of a pattern develops and which is kept beautifully over a long period of time, and the molded body with the pattern obtained thereby. <P>SOLUTION: The thin film 6 including at least the coloring layer and a bonding layer of a transfer sheet is transferred through the bonding layer on the top surface of a lid body 4 and, after the removal of the base sheet of the transfer sheet from the thin film 6, the layers except the bonding layer among the thin film 6 transferred to the top surface of the lid body 4 are partially removed through the irradiation of laser beam, resulting in emerging a colored pattern by the partial exposure of the bonding layer 10 through the removal marks of the layers except the bonding layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a process for producing a molded article with a pattern having a colored pattern on the surface and a molded article with a pattern using the same.

  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. For this reason, various techniques for decorating cosmetic containers have been proposed. For example, a technique for integrating a decorative film on a lid of a compact container without using an adhesive is disclosed (see Patent Document 1).

  In addition, recently, in order to give a more complicated pattern, a part of the decorative film is removed by laser irradiation, and the ground part of the container is exposed from the removed part to form a character or a design pattern. Has been done. However, the above method has a problem that the color of characters and designs is limited to the color of the background of the container, so that the impression is weak as a whole.

Therefore, as a method of giving a more impressive pattern, after forming a colored layer on the surface of the molded body and further forming a coating layer thereon, a through-hole is formed in the coating layer by laser irradiation. A method for exposing a colored layer from a portion has been proposed (see Patent Document 2).
JP 2001-292828 A JP 2002-127691 A

  However, when the coating layer is superimposed on the colored layer, the adhesion between the coating layer and the colored layer may be insufficient, and the edge of the coating layer or the opening edge of the through-hole portion may be used over time. There is a problem that the coating layer is easily peeled off or cracked from the portion. In addition, when the pattern is made fine, such damage is likely to occur, so that there is a problem that a very delicate pattern cannot be made. In addition, the colored layer and the coating layer must be formed in order, and there is a problem that it takes time.

  The present invention has been made in view of such circumstances, and it is not necessary to sequentially form a colored layer and a coating layer, and further, the portion constituting the pattern is not peeled off, and the pattern can be kept beautiful over a long period of time. The object of the present invention is to provide a method for producing a patterned molded body that can be slid and to provide a patterned molded body obtained thereby.

  In order to achieve the above object, according to the present invention, a colored layer and an adhesive layer are laminated on a base sheet in this order, directly or via another layer, and the adhesive layer has the color of the colored layer. And a step of preparing a transfer sheet colored in a different color tone, and transferring a laminated portion of the transfer sheet including at least a colored layer and an adhesive layer to the surface of the molded body via the adhesive layer, and the base sheet And removing the layer other than the adhesive layer from the laminated portion transferred to the surface of the molded body by laser irradiation, and partially exposing the adhesive layer from the removal trace. The first gist is a process for producing a molded article with a pattern comprising a step of causing a color pattern to appear.

  In addition, the present invention has, in particular, a second gist of a method for producing a patterned molded article in which the colored layer includes a metal vapor deposition layer and has a metallic luster, and the adhesive layer includes an adhesive. A method for producing a patterned molded body formed using a composition containing 0.1 to 50 parts by weight (hereinafter abbreviated as “part”) of a colorant with respect to 100 parts by weight of the composition is a third gist, and A fourth gist is a method for producing a patterned molded body in which laser irradiation is performed by any one of a YAG laser, a YVO4 laser, and a semiconductor laser.

  And this invention makes the molded object with a pattern obtained by the manufacturing method which is any one of the said 1st-4th summary as a 5th summary.

  That is, according to the present invention, the adhesive layer of the transfer sheet, which has conventionally only had the function of adhering the colored layer, is colored with a color different from the colored layer thereon, and the layer above the adhesive layer. Is partially removed by laser irradiation, the adhesive layer is partially exposed from the removal trace, and a color pattern appears. Therefore, as in the prior art, a colored layer is first formed by painting, transferring, or the like, and further a coating layer is formed thereon by painting, vapor deposition, transferring, etc., and then the coating layer is partially removed to lower the lower layer. There is an advantage that the two-step process of forming the color pattern by partially exposing the colored layer is unnecessary and the efficiency is high. And since the adhesive layer itself of the transfer sheet is colored, it has excellent adhesion to the colored layer on it (equivalent to a conventional coating layer), and the colored layer does not peel or crack over time. , It has the advantage of being kept in good condition for a long time and maintaining a beautiful appearance. And since the durability of the said colored layer is high, it has the advantage that the color pattern of a delicate design can be made. Moreover, since it is not necessary to form an extra colored layer to be exposed, the thickness of the color pattern portion can be made extremely thin, and the overall weight can be reduced.

  In the present invention, in particular, when the colored layer includes a metal vapor deposition layer and has a metallic luster, the metallic luster of the colored layer and the color of the adhesive layer partially exposed However, it is an impressive contrast with shading, and a particularly interesting color pattern can be obtained.

  Further, in the present invention, in particular, when the adhesive layer is formed using a composition containing 0.1 to 50 parts of a colorant with respect to 100 parts of the adhesive composition, the adhesiveness is improved. An adhesive layer having a clear color tone can be obtained without impairing the thickness.

  Further, in the present invention, in particular, when the laser irradiation is performed by any one of a YAG laser, a YVO4 laser, or a semiconductor laser, partial removal of the peeling layer and the colored layer transferred to the surface of the molded body is achieved. It is suitable because it can be finished efficiently and beautifully.

  And the molded object with a pattern obtained by the manufacturing method of this invention maintains the state in which the pattern provided on the surface was favorable over a long period of time, and becomes a product with high added value. And there is an advantage that there is almost no height difference in the pattern part and the touch is good.

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

  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. The lid 4 that covers the upper opening of the main body 1 is hinged to the main body 1 and opens upward as indicated by the chain line in FIG. Reference numeral 5 denotes a mirror attached to the inner surface of the lid 4.

  The lid 4 is made of a colorless and transparent acrylic resin molded body, and the entire upper surface thereof is covered with a thin film 6 having an aurora-like metallic luster. And the surface part is removed partially, The removal part exhibits a reddish transparent color, and it has become the fine color pattern P imitating a vine. In FIG. 2, the cross section of the thin film 6 is schematic and is different from the actual thickness (the same applies to the following drawings).

  The lid 4 provided with the color pattern P can be obtained, for example, as follows. That is, first, as shown in FIG. 3A, a transfer sheet in which a release layer 8, a colored layer 9, and an adhesive layer 10 are laminated in this order on a base sheet 7 is prepared.

  In the transfer sheet, the base sheet 7 is for holding the transferred portion (the release layer 8, the colored layer 9 and the adhesive layer 10) in a stable state. It may be the same as that used for the so-called “transfer foil” and the same hereinafter, and is not particularly limited.

  The release layer 8 is a layer for cleanly peeling the base sheet 7 from the transferred portion after transfer, and the material and thickness thereof may be the same as those conventionally used for transfer sheets. There is no particular limitation. However, a colorless and transparent one is usually used so that the color of the colored layer 9 to be transferred can be seen as it is.

  Furthermore, the colored layer 9 is composed of two layers, a polarizing layer 9a made of a transparent resin composition containing a polarizing pigment and an aluminum vapor deposition layer 9b. The polarizing layer 9a gives aurora-like polarized light to the metallic luster of the aluminum vapor-deposited layer 9b below the polarizing layer 9a, and any of those conventionally used for making an aurora-like transfer foil can be used. There is no problem. Further, the thicknesses of these layers 9a and 9b are not particularly limited.

  The adhesive layer 10 may be formed using any adhesive composition conventionally used for an adhesive layer of a transfer sheet, and its thickness can be arbitrarily set. By containing a colorant, the adhesive layer 10 must have a color tone different from the color of the colored layer 9. By the way, in this example, a colored adhesive composition containing 2 parts of a red colorant with respect to 100 parts of an adhesive composition containing an acrylic resin as a main component is used, and the whole was reddish. A transparent adhesive layer 10 is formed.

  On the other hand, the resin molded body in which the shape of the lid 4 is shaped is molded using an injection molding machine or the like. Then, the adhesive layer 10 of the transfer sheet is brought into close contact with the upper surface of the lid 4, and a predetermined temperature and a predetermined pressure are applied using a transfer machine such as a roll transfer machine or an up-down transfer machine, Adhering to the entire top surface of the lid 4. After cooling, the base sheet 7 is peeled off from the release layer 8 so that the release layer 8, the colored layer 9, and the adhesive layer 10 are laminated on the entire top surface of the lid 4 as shown in FIG. The portion (thin film 6) can be transferred. The outermost peeling layer 8 is transparent, and the aurora-like metallic luster color of the colored layer 9 made of the polarizing layer 9a and the aluminum vapor-deposited layer 9b is the color of the entire upper surface of the lid 4 as it is. I can see it.

  Next, laser irradiation is performed on a predetermined partial region (color pattern formation scheduled portion) of the upper surface of the lid body 4, and the peeling layer 8 and the colored layer 9 in the portion are removed, and the lowermost layer is formed. An adhesive layer 10 is exposed (see FIG. 4). As a result, the portion 20 of the adhesive layer 10 exposed by the laser irradiation exhibits a reddish transparent color, and a color pattern P having a metallic gloss color as a ground color appears. In this way, the lid 4 on which the color pattern P is formed can be obtained.

  According to this method, as before, a colored layer is first formed by painting, transferring, etc., and then a coating layer is formed thereon by painting, vapor deposition, transfer, etc., and then the coating layer is partially removed. Thus, the two-stage process of forming the color pattern by partially exposing the lower colored layer is unnecessary, and the color pattern P can be obtained very efficiently. And since it is not necessary to form an additional colored layer on the lower side, the thickness of the color pattern portion can be made extremely thin, and the overall weight can be reduced. Further, since the adhesive layer 10 itself of the transfer sheet is colored, it has excellent adhesion to the colored layer 9 thereon, and the colored layer 9 does not peel or crack over time, and is good for a long time. It has the advantage that it is kept in a state and a beautiful appearance is maintained. And since the durability of the said colored layer 9 is high, it has the advantage that the color pattern of a delicate design can be made.

  By the way, in the above example, the leaf portion of the vine with the color pattern P, for example, as shown in FIG. 5, a thin vein line Q (for example, the width of the line Q is 0.01 to 0.1 mm) is inserted. Thus, even if the color pattern P is produced by irradiating the laser with leaving the line Q so that the leaf part becomes the exposed part 20 of the adhesive layer 10, the line Q may be peeled off even after long-term use. The beautiful color pattern P is maintained well.

  The configuration of the thin film 6 transferred to the upper surface of the lid 4 is not limited to the above example, and includes a colored layer 9 and an adhesive layer 10 that is colored in a color different from that of the colored layer 9. If there is no particular limitation, when the base sheet 7 is removed, the release layer 8 does not remain in the transferred thin film 6 when the release layer 8 is removed together with the base sheet 7.

  Further, the colored layer 9 is not limited to the example in which the polarizing layer 9a and the aluminum vapor-deposited layer 9b are combined as in the above example. For example, as shown in FIG. Alternatively, it may be transferred from a transfer sheet on which only the aluminum vapor deposition layer 9b is formed via the release layer 8. In this case, the configuration of the color pattern P is as shown in FIG. Of course, instead of the aluminum vapor-deposited layer 9b, a stainless steel vapor-deposited layer or a metal vapor-deposited layer combined with a hologram forming layer or a pearl tone imparting layer may be used.

  Further, for example, as shown in FIG. 7 (a), transfer is performed from a transfer sheet in which a colored layer 9 consisting only of a resin colored layer, an ink layer, etc. is formed on a base sheet 7 via a release layer 8. It may be what was done. In this case, the configuration of the color pattern P is as shown in FIG. However, when the metal vapor deposition layer is used as the colored layer 9 or a part of the colored layer 9, the color of the adhesive layer exposed by removing this layer and the metallic luster color become clear and the impression is strong. Since a color pattern is obtained, it is suitable.

  The adhesive layer 10 for adhering the colored layer 9 and the like to the upper surface of the lid 4 contains a colorant and is colored in a color tone different from the color of the colored layer 9 and the like, as described above. Must be a thing.

  The colorant can be appropriately selected from various pigments and dyes in consideration of dispersibility, solubility, and the like for the base adhesive composition. In particular, a colorant suitable for olefin applications is used for the olefin adhesive composition, and a colorant suitable for vinyl chloride / vinyl acetate is used for the vinyl chloride / vinyl acetate adhesive composition. Is preferred.

  However, the content ratio is not limited to the above example, and is preferably set to 0.1 to 50 parts with respect to 100 parts of the adhesive composition. That is, when the amount of the colorant is less than 0.1 part, the color tone of the obtained adhesive layer 10 is weak, and even if the adhesive layer 10 is partially exposed, it is difficult to obtain a clear color pattern P. If the amount is more than 50 parts, the adhesive strength of the adhesive layer 10 to the molded body (the lid body 4 in the above example) may be reduced, which is not preferable.

  In order to form the thin film 6, as a method of transferring a predetermined laminated portion from the transfer sheet, in the above example, the transfer is performed on the lid body 4 formed by injection molding. However, instead of this, in-mold molding may be performed in which transfer is performed simultaneously with the molding of the lid body 4. That is, according to this method, when the lid 4 is injection-molded, first, a transfer sheet is supplied into the mold, and at the same time as the molding, a predetermined laminated portion is transferred from the transfer sheet to the surface of the lid 4. At the same time as the mold is opened, the base sheet 7 is removed from the release layer 8 to remove the lid 4. Thereby, the lid body 4 having a predetermined laminated portion transferred to the upper surface can be obtained.

  In the above example, the laser irradiation can be performed using various laser devices such as a carbon dioxide laser, a ruby laser, a YAG laser, a YVO4 laser, and a semiconductor laser. However, in terms of controllability and finish, a YAG laser can be used. It is preferable to use any one of YVO4 laser and semiconductor laser.

  In addition, although said example applies this invention to the cover body 4 of a compact container, if the object which gives the color pattern P is not only the cover body 4 but molded objects, such as a bottle and resin, It doesn't matter what it is.

  And the color of a molded object does not need to be colorless and transparent like said example, A colored transparent and colored opaque thing may be used. For example, by combining the white opaque material with the reddish transparent adhesive layer 10 as in the above example, the color tone of the exposed portion of the adhesive layer 10 can be made to appear opaque pink, which is colorless and transparent. Rather than showing the color of the adhesive layer 10 as it is in combination with the molded body, there may be a case where the color tone spreads and is interesting.

  Next, examples of the present invention will be described together with comparative examples.

[Example 1]
A transfer sheet in which the following layers were laminated in this order was prepared.
Base sheet Polyester resin sheet thickness 38μm
Colored layer Acrylic resin coating thickness 2μm
Colored layer Polarizing sheet made of acrylic resin containing polarizing pigment Thickness 0.5 μm
Vapor deposition layer Aluminum vapor deposition layer Adhesion layer Adhesion layer containing 2 parts of red colorant for 100 parts of olefin resin Thickness 2 μm

  After performing in-mold molding using the transfer sheet, the adhesive layer is partially exposed by laser irradiation to reveal the color pattern P, and the lid similar to the lid 4 of the compact container shown in FIG. Got.

[Examples 2 to 5]
In the adhesive layer, the content ratio of the red colorant relative to 100 parts of the olefin resin was changed as shown in Table 1 below. Other than that was carried out similarly to the said Example 1, and obtained four types of lid bodies.

[Comparative example]
A lid (no pattern) similar to the lid 4 of the compact container shown in FIG. 1 is prepared, and 2 μm of an olefin resin paint containing 2 parts of a red colorant with respect to 100 parts of the olefin resin paint is formed on the entire upper surface. A colored layer was obtained by coating with a thickness of. In addition, except that the adhesive layer is a colorless and transparent adhesive layer that does not contain a red colorant, using a transfer sheet having the same configuration as the transfer sheet used in Example 1, using a transfer machine The laminated part below the peeling layer was transferred. And the colored layer was exposed partially by laser irradiation, and the color pattern P was made to appear, and the cover body similar to the cover body 4 of the compact container shown in FIG. 1 was obtained.

  The appearance and durability of these Example products and Comparative Example products were evaluated by the following methods, and the results are also shown in Table 1 below.

〔appearance〕
10 monitors were visually observed and the appearance was beautiful, ◎… very beautiful. Evaluation was made based on a four-step evaluation of ◯: beautiful, Δ: normal, ×: not beautiful, and an average evaluation was obtained.

〔durability〕
The nonwoven fabric was lightly applied to the surface of the lid, and in this state, a rubbing operation for reciprocating the nonwoven fabric in the surface direction was given 2000 times. And 10 monitors visually observe the change of the color pattern part, ◎… No change, ○… Slight change but not interested, △… Slight but noticeable change, ×… Big An evaluation was made in four stages, ie, there was a change, and an average evaluation was obtained.

  From the above results, it can be seen that the example products are generally good in either evaluation. Moreover, it turns out that a comparative example product is inferior to an Example product in these evaluations.

It is a perspective view of one Example of this invention. It is XX 'sectional drawing of FIG. (A), (b) is both explanatory drawing of the manufacturing method of the said Example. It is explanatory drawing of the manufacturing method of the said Example. It is explanatory drawing of the color pattern of the said Example. (A) is explanatory drawing of the other transfer sheet which can be used for this invention, (b) is explanatory drawing of the color pattern part obtained by it. (A) is explanatory drawing of the other transfer sheet which can be used for this invention, (b) is explanatory drawing of the color pattern part obtained by it.

Explanation of symbols

4 Lid 6 Thin film 10 Adhesive layer P Color pattern

Claims (5)

  A transfer sheet is prepared in which a colored layer and an adhesive layer are laminated directly or via other layers in this order on the base sheet, and the adhesive layer is colored in a color tone different from the color of the colored layer. And a step of transferring a laminated portion including at least a colored layer and an adhesive layer of the transfer sheet to the surface of the molded body through the adhesive layer, and removing the base sheet from the laminated portion, A step in which a layer other than the adhesive layer is partially removed by laser irradiation in the laminated portion transferred to the surface of the molded body, and a color pattern is exposed by exposing the adhesive layer from the removal trace. A process for producing a molded article with a pattern.   The process for producing a shaped article with a pattern according to claim 1, wherein the colored layer includes a metal vapor-deposited layer and has a metallic luster.   The process for producing a patterned molded article according to claim 1 or 2, wherein the adhesive layer is formed using a composition containing 0.1 to 50 parts by weight of a colorant with respect to 100 parts by weight of the adhesive composition.   The method for producing a patterned molded body according to any one of claims 1 to 3, wherein the laser irradiation is performed using any one of a YAG laser, a YVO4 laser, and a semiconductor laser.   A molded article with a pattern obtained by the production method according to any one of claims 1 to 4.

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