JP2010051979A - Method for producing decorative molded body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an excellent decorative molded product where, when a thin film layer formed on the surface of a molded body is partially removed by laser irradiation, masking for protecting the part other than the removal part is easily performed at a low cost without requiring skill, and further, its specifications is flexibly changed. <P>SOLUTION: When a molded body 3 with a thin film layer 4 formed on the surface via an adhesive layer 5 is subjected to laser irradiation A, thus the thin film layer 4 at the irradiated part is removed, and the adhesive layer 5 as the face below the same is exposed to form a surface pattern, a masking sheet material is subjected to laser irradiation B applying irradiation position data for the laser irradiation A, and, a masking sheet 10 in which a notched part Q with a shape same as that of the removal schedule part of the thin film layer 4 by the laser irradiation A (the above surface pattern)is formed, is used to perform masking. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention removes the thin film layer at the irradiated portion by irradiating a molded body having a thin film layer formed on at least a part of the surface directly or via another layer, thereby removing the thin film layer at the irradiated portion. It is related with the manufacturing method of the decorative molded body which exposed the surface and formed a surface pattern.

A compact container or a lipstick container containing cosmetics is required not only to have a good appearance but also to have a design reflecting the product image, as well as to have functionality and durability.
As a technology that meets such demands, for example, a container in which at least a part of the surface is formed of a transparent resin molded body, a thin film layer is formed on the surface via a colored adhesive layer, and a thin film on the surface A technique is disclosed in which a part of the layer is removed by laser irradiation to expose a colored adhesive layer to form a color pattern on the surface (see Patent Document 1). According to this technique, it is possible to provide a container provided with a surface pattern that efficiently maintains a beautiful appearance.
JP 2007-216417 A

  However, as shown in FIG. 8, a part of the thin film layer 4 is removed by laser irradiation with respect to the molded body 3 having the thin film layer 4 formed on the surface, and the adhesive layer 5 under the surface is exposed to expose the surface. When the pattern P is formed, particularly when the surface of the molded body 3 is curved or has an uneven surface, the irradiated laser beam is reflected on the molded body 3 and the thin film layer 4 is scheduled to be removed. The thin film layer 4 may be removed up to a portion X other than (the portion that becomes the surface pattern P), which is a problem.

  Therefore, when performing laser irradiation, portions other than the portion to be removed are masked with a light-shielding tape or the like to protect the thin film layer 4, but this operation is performed while confirming the protection site. It is wasteful because trial and error are repeated. Further, masking work tends to require advanced techniques, and requires time, labor, and skill. Furthermore, in recent years, the design of containers has become more complex and sophisticated, so the design of the area where the thin film layer 4 is scheduled to be removed by laser irradiation has become more complex and sophisticated. Masking is difficult even for a skilled person. Further, every time the container design is changed, that is, the design of the portion where the thin film layer 4 is to be removed is changed, the shape of the tape or the like must be changed accordingly.

  The present invention has been made in view of such circumstances, and when partially removing the thin film layer formed on the surface of the molded body by laser irradiation, masking for protecting other than the removed portion can be performed at low cost. An object of the present invention is to provide a method for producing an excellent decorative molded product which can be easily performed without requiring skill, and whose specifications can be flexibly changed.

  In order to achieve the above object, the present invention provides a thin film of an irradiated portion by performing laser irradiation A on a molded body in which a thin film layer is formed on at least a part of the surface directly or via another layer. A method for producing a decorative molded body in which a surface pattern is formed by removing a layer and exposing a lower surface thereof, and a thin film layer is formed on at least a part of the surface directly or via another layer A step of preparing the molded body, a step of preparing irradiation position data for the laser irradiation A, a laser irradiation B with the irradiation position data being applied to the masking sheet material, and a thin film formed by the laser irradiation A By forming a notch portion having the same shape as the layer removal scheduled portion, the masking sheet is formed on the thin film layer forming surface of the molded body, and the thin film layer removal plan by laser irradiation A is formed. The portion exposed from the notch portion of the masking sheet, while protecting the other parts, the preparation of the so and a step of performing laser irradiation A decorative molded body with the first aspect.

  Moreover, this invention is a manufacturing method of the 1st summary, The manufacturing method of the decoration molded object which used what was equipped with the adhesion layer and the peeling sheet which coat | covers this adhesion layer as a masking sheet material on the back surface. Is the second gist.

Further, in the manufacturing method according to the first or second aspect of the present invention, any one of a YAG laser, a YVO4 laser, and a semiconductor laser is used as the laser irradiation A, and a CO ₂ laser is used as the laser irradiation B. The manufacturing method of the decorated molded body is the third gist.

  In the present invention, by performing laser irradiation A on a molded body having a thin film layer formed directly on the surface or via another layer, the thin film layer in the irradiated portion is removed and the lower surface is exposed. In the manufacturing method of the decorative molded body in which the surface pattern is formed, by performing the laser irradiation B with the aid of the irradiation position data on the masking sheet material, the same shape as the thin film layer removal scheduled portion by the laser irradiation A is performed. A masking sheet in which a notch was formed was prepared, and this was overlaid on the molded body, and the portion to be removed by the laser irradiation A was exposed from the notch in the masking sheet, and the other parts were protected. In this state, laser irradiation A is performed. According to this manufacturing method, it is possible to easily and accurately mask the portions other than the laser irradiation scheduled portion, which conventionally requires skill and has been performed by trial and error. Therefore, it is possible to obtain a decorative molded body with a beautiful surface pattern easily and at low cost without masking a large number of products through trial and error as before and without requiring skill.

  Moreover, even if the design of the portion to be removed of the thin film layer by laser irradiation is changed, the specification of the masking sheet can be easily changed by using the irradiation position data of the laser irradiation after the change. And since the notch part of this masking sheet can be produced in one step of laser irradiation, by using this masking sheet for masking work, a wide variety according to needs in a short period of time, Products with a beautiful surface pattern can be delivered.

  In the present invention, in particular, as a masking sheet material, a so-called sealing material provided with a pressure-sensitive adhesive layer on the back surface and a release sheet covering the pressure-sensitive adhesive layer is used. By simply peeling off the sheet and exposing the adhesive layer, it can be easily adhered to the molded body via this adhesive layer. Therefore, it is easy to fix the masking sheet to the molded body, the masking operation of the molded body can be further accelerated and facilitated, and the efficiency of the laser irradiation operation on the molded body can be further improved.

In the present invention, in particular, when the laser irradiation A is performed by any one of a YAG laser, a YVO4 laser, and a semiconductor laser, partial removal of the thin film layer on the surface of the molded body is efficiently performed. Moreover, it can be finished beautifully and is suitable. In addition, a laser using a CO ₂ laser as the laser irradiation B is suitable because it can form a notch portion of the masking sheet efficiently because continuous oscillation with a large output is possible.

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

  As an example of a decorative molded body obtained by the method for producing a decorative molded body of the present invention, a compact container shown in FIG. In the figure, reference numeral 1 denotes a main body, and 2 denotes a lid. On the surface of the lid 2, the thin film layer 4 at the irradiated portion is removed by laser irradiation A, and the colored adhesive layer 5 below is exposed. Thus, a surface pattern P is formed. And, the rear end portion of the lid body 2 has a hinge portion protruding downward (not shown), and this hinge portion engages with the rear end portion of the main body portion 1, The lid 2 opens upward.

  More specifically, as shown in FIG. 2 which is a partial cross-sectional view of the lid 2, the thin film layer 4 made of aluminum vapor deposition having metallic luster is formed on the surface of the molded body 3 made of acrylic resin. It is formed by laminating via a transparent adhesive layer 5 colored. And the said thin film layer 4 is partially removed, the lower surface (adhesion layer 5) is exposed from the removal part, and it exhibits the reddish transparent color, and the surface pattern P imitating a vine is formed. . In FIG. 2, the cross section of the thin film layer 4 is schematic and is different from the actual thickness (the same applies to the following drawings).

  The lid 2 can be obtained, for example, as follows by the production method of the present invention.

  First, as shown in FIG. 3A, a transfer sheet in which a thin film layer 4 and an adhesive layer 5 are laminated in this order on a base sheet 6 is prepared.

  In the transfer sheet, the base sheet 6 is for holding the transferred portions (the thin film layer 4 and the adhesive layer 5) in a stable state, and the material and thickness of the transfer sheet are conventionally known as transfer sheets (so-called “transfer foils”). And the same as those used in the following). And the thickness of the said thin film layer 4 may be the same as what was conventionally used for the decoration of a decoration molded object.

  Moreover, the said adhesive layer 5 is shape | molded using the adhesive composition conventionally used for the adhesive layer of a transfer sheet, The thickness can also be set arbitrarily. In this example, a reddish and transparent adhesive layer 5 mainly composed of an acrylic resin is formed.

  On the other hand, the molded body 3 in which the shape of the lid 2 is shaped is molded using an injection molding machine or the like. Then, the adhesive layer 5 of the transfer sheet is brought into intimate contact with the upper surface of the formed body 3, 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, and the adhesive layer 5 is attached. Then, the entire upper surface of the molded body 3 is adhered. After cooling, by peeling the base sheet 6 from the thin film layer 4, the thin film layer 4 can be formed on the entire upper surface of the molded body 3 via the adhesive layer 5 as shown in FIG. At this time, the metallic luster color of the aluminum vapor deposition layer of the thin film layer 4 is visible as it is on the entire upper surface of the molded body 3.

  Next, in the molded body 3, YAG laser irradiation (laser irradiation A) is performed to partially remove the thin film layer 4 and expose the adhesive layer 5 which is the lower surface to form a surface pattern P. I do. However, prior to that, the masking sheet 10 used for the YAG laser irradiation is prepared.

  That is, first, irradiation position data of a portion to be removed of the thin film layer 4 (a portion on which a surface pattern P (in this example, a weed pattern shown on the surface of the lid portion 2 in FIG. 1) is to be formed) used during the YAG laser irradiation. Prepare.

Then, as a masking sheet material, a sheet 9 made of polyethylene terephthalate (PET) having a thickness of 200 μm provided with an adhesive layer 7 made of an acrylic adhesive on the back surface and a release sheet 8 made of a release material covering the adhesive layer 7 (FIG. 5). Reference) is prepared, and CO ₂ laser irradiation (laser irradiation B) is performed with reference to the irradiation position data used at the time of YAG laser irradiation. As a result, as shown in FIG. 4, a masking sheet 10 can be obtained in which a notch portion Q is formed in the same shape as the portion to be removed by the YAG laser irradiation, that is, the same shape as the surface pattern P. . A partial cross-sectional view of the masking sheet 10 is shown in FIG. The “same shape” is intended to include not only the completely same shape but also a shape that takes into account the thickness of the masking sheet 10 and the depth of irregularities on the surface of the molded body forming the surface pattern P.

  Then, after peeling off the release sheet 8 on the back surface of the masking sheet 10 in which the notch portion Q is formed to expose the adhesive layer 7, the YAG laser is formed on the molded body 3 as shown in FIG. The portion to be removed by the thin film layer 4 is overlapped so as to be exposed from the notch portion Q of the masking sheet 10, and YAG laser irradiation is performed. At this time, the masking sheet 10 can be easily and accurately bonded and fixed to the molded body 3 by the adhesive layer 7.

  In this state, the YAG laser irradiation is performed according to the prepared irradiation position data, thereby removing the portion to be removed of the thin film layer 4. At this time, conventionally, the laser beam is reflected on the irradiation surface, and the thin film layer 4 at the portion X (other than the portion where the thin film layer is scheduled to be removed) may be removed (see FIG. 8). Since the masking sheet 10 can easily protect portions other than the portion where the thin film layer 4 is scheduled to be removed, only the thin film layer 4 at the irradiated portion is accurately removed, and the adhesive layer 5 as the lower surface is exposed. A surface pattern P (in this example, the above-mentioned vine pattern) can be formed. In this way, the lid 2 that is a decorative molded body in which the beautiful surface pattern P as designed is formed on the molded body 3 can be obtained.

According to this structure, the thin film layer 4 formed on the surface of the molded body 3 is removed, and irradiation position data of YAG laser irradiation (laser irradiation A) performed to produce the surface pattern P is obtained as CO ₂ for the masking sheet material. By using the laser irradiation (laser irradiation B), the masking sheet 10 in which the notch Q is formed in the same shape as the surface pattern P can be easily produced. Therefore, the masking operation at the time of the YAG laser irradiation can be easily performed by simply overlapping the notch portion Q of the masking sheet 10 with the portion to be removed of the thin film layer 4 and, as in the conventional technique, I don't need it. In addition, since it is not necessary to perform the masking operation through trial and error, the operation is not wasted and the cost of the product can be reduced. Furthermore, since the masking sheet 10 is provided with the adhesive layer 7 and the release sheet 8 covering the adhesive layer on the back surface, the masking sheet 10 is exposed by peeling the release sheet 8 to expose the adhesive layer 7. Can be adhered and fixed to the surface of the molded body 3 easily and accurately, and the masking operation can be performed more efficiently.

Moreover, since the masking sheet 10 forms the notch portion Q by CO ₂ laser irradiation using the irradiation position data of YAG laser irradiation on the molded body 3, the surface pattern P formed on the surface of the molded body 3 Even if the shape is complicated or the shape is changed, the notch Q can be easily formed in the same shape as the surface pattern P after the complexity and change.

  Moreover, since the masking sheet 10 is made of PET and has flexibility, even when the surface of the molded body 3 is curved, the masking sheet 10 is curved along the curved surface. It can be stacked on the surface without any gaps. Therefore, when this is used for masking, it is possible to accurately protect the portion other than the portion where the thin film layer 4 is scheduled to be removed by the YAG laser irradiation. There is no risk of manufacturing.

  And according to this manufacturing method, since the thin film layer 4 of the part X which is not planned is not removed by YAG laser irradiation, the obtained product becomes beautiful as designed.

  In the above example, the thin film layer 4 is formed on the entire upper surface of the molded body 3 with the adhesive layer 5 interposed therebetween. However, the thin film layer 4 is formed only on a part of the molded body 3 and is limited. A surface pattern P may be added to the range. In this case, the cost and time required for forming the thin film layer 4 and the surface pattern P can be reduced.

  In the above example, the thin film layer 4 formed on the surface of the molded body 3 is an aluminum vapor deposition layer formed by transfer using a transfer sheet. However, the material is conventionally added to the molded body. Anything can be used as long as it is used for decoration. For example, various materials such as a colored film (sheet), a hologram sheet, a metal foil, and a paint coating film are used in addition to the metal vapor deposition layer. And the formation method employ | adopts an appropriate method according to the materials, such as vapor deposition, sputtering, plating, a hot stamp, coating.

  And the member which comprises the molded object 3 should just be a member conventionally used for molded articles, such as a container, For example, in addition to an acrylic resin, polystyrene (PS), acrylonitrile-butadiene-styrene (ABS resin), polycarbonate (PC), polymethyl methacrylate (PMMA) and the like.

  Moreover, although the sheet | seat 9 which consists of PET was used as a sheet | seat part among the members which comprise a masking sheet material, the removal of the thin film layer 4 by the laser beam reflected by the laser irradiation A should just be prevented, and other than PET Fine paper, synthetic paper, polyvinyl chloride and the like can be used. Among these, PET and synthetic paper are preferably used because they are flexible and can easily form the notch Q by laser irradiation B. The sheet portion only needs to be able to prevent the thin film layer 4 from being removed by the laser beam reflected by the laser irradiation A. In this case, the sheet portion may be slightly transparent.

  And among the members which comprise the said masking sheet material, although the adhesion layer 7 which consists of acrylic adhesives was used as an adhesion layer, if the sheet | seat 9 can be adhere | attached and fixed to the molded object 3 surface, It can be appropriately selected depending on the material of the sheet 9 and the molded body 3. Moreover, although the release sheet 8 which consists of release materials was used as a release sheet among the members which comprise the said masking sheet material, it protects until the adhesion layer 7 is adhere | attached and fixed to the molded object 3 surface, and an adhesion layer Any material can be used as long as it can be easily peeled off from the adhesive layer 7, and can be appropriately selected depending on the material of the adhesive layer 7.

  Further, in the above example, the masking sheet material is provided with the adhesive layer 7 on the back surface of the sheet 9 and the release sheet 8 covering the masking layer material. Therefore, it is not always necessary to provide the adhesive layer 7 and the release sheet 8. In this case, the production cost of the masking sheet 10 can be reduced, and consequently the product cost can be reduced. However, if the masking sheet 10 is provided with the adhesive layer 7, it can be easily and accurately fixed to the molded body 3, so that the efficiency and effect of masking are improved, and a beautiful product as designed is efficiently manufactured. can do.

  Further, in the above example, only the thin film layer 4 at the irradiated portion is removed by YAG laser irradiation, and the surface pattern P is formed by exposing the reddish transparent adhesive layer 5 which is the lower surface. However, the color of the adhesive layer is not limited to red, and can be appropriately selected according to the required design. Further, it is not always necessary to color the adhesive layer 5, and the surface pattern P may be formed through the exposed transparent adhesive layer 5 so as to show the surface of the molded body 3 itself below. Good.

  Further, as shown in a partial cross-sectional view in FIG. 7, not only the thin film layer 4 but also the adhesive layer 5 is removed at the same time so that the surface of the molded body 3 itself is exposed to form a surface pattern P. Also good. Of course, even when the thin film layer 4 is directly formed on the molded body 3 and the adhesive layer 5 is not provided, the thin film layer 4 at the irradiated portion is removed, and the surface of the molded body 3 itself is exposed to form the surface pattern P. be able to.

  In the above example, the masking sheet 10 is overlaid on the surface of the molded body 3 so as to cover the entire surface. However, when the size of the surface pattern P is small or only a part of the surface of the molded body 3 is uneven. In the case where is formed, the masking sheet 10 does not necessarily have to be overlaid on the entire surface, and may be overlaid so as to cover only necessary portions. Also in this case, the masking operation can be speeded up.

The laser irradiation A for removing the thin film layer 4 on the surface of the molded body 3 uses a YAG laser in the above example, but the type of laser is YVO4 laser, semiconductor laser, ruby laser depending on the material. It can be carried out using various laser devices such as a CO ₂ laser. Among these, use of a YAG laser, a YVO4 laser, or a semiconductor laser is preferable in terms of controllability and finish when the thin film layer 4 formed on the surface of the molded body 3 is removed.

On the other hand, the laser irradiation B performed for forming the notch Q in the masking sheet material and manufacturing the masking sheet 10 uses a CO ₂ laser in the above example, but is appropriately selected according to the material. And various laser devices such as a YAG laser, a YVO4 laser, a semiconductor laser, and a ruby laser can be used. However, the masking sheet 10 is used for masking when the laser irradiation A is performed, and it is necessary that the masking sheet 10 is not removed by the laser irradiation A. Therefore, naturally, the laser irradiation B is of a different type from the laser irradiation A. Of these, use of a CO ₂ laser is preferable in terms of controllability and finish when the notch Q is formed in the masking sheet material.

  In addition, although FIG. 1 applies this invention to a compact container, the molded object to which this invention is applied is not restricted to a container, It combines various resin molded objects, or other members in the resin molded object. It can be applied to a molded body or the like. For example, it can be widely applied to mobile phones, stationery, home appliances, various cases, and the like.

It is explanatory drawing of one Example of this invention. It is a longitudinal cross-sectional view in the said Example. (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 manufacturing method of the said Example. It is explanatory drawing of the manufacturing method of the said Example. It is explanatory drawing of the other Example of this invention. It is explanatory drawing of a prior art.

Explanation of symbols

3 Molded body 4 Thin film layer 5 Adhesive layer 10 Masking sheet P Surface pattern Q Notch

Claims (3)

  By performing laser irradiation A on the molded body in which the thin film layer is formed directly on at least a part of the surface or through another layer, the thin film layer at the irradiated portion is removed and the lower surface is exposed. A method for producing a decorative molded body in which a surface pattern is formed by preparing a molded body in which a thin film layer is formed on at least a part of the surface directly or via another layer, and the laser irradiation A step of preparing irradiation position data for A, and laser irradiation B is performed on the masking sheet material with the aid of the irradiation position data, and a cutout portion having the same shape as the thin film layer removal planned portion by laser irradiation A is formed. Forming a masking sheet by forming, overlaying the masking sheet on the thin film layer forming surface of the molded body, and removing the thin film layer to be removed by laser irradiation A in the notch of the masking sheet Exposed from while protecting the other parts, preparation of the decorative molded body, characterized in that a step of performing laser irradiation A.   The method for producing a decorative molded body according to claim 1, wherein a material having an adhesive layer on the back surface and a release sheet covering the adhesive layer is used as the masking sheet material. As the laser irradiation A, YAG laser, YVO4 laser, using one of the semiconductor laser, as the laser irradiation B, preparation of decorative molded body according to claim 1 or 2, wherein as adapted to use a CO ₂ laser.

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