JP2003320796A - Curved surface transfer sheet and transfer method, and molded object decorated by transfer method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curved surface transfer sheet used for applying smooth transfer to the surface of the side peripheral wall surface of a molded object of which the side peripheral wall is formed into a curved surface as a rotary surface of a planar curved line or an oval surface, a transfer method and the molded object to which a pattern is transferred by the transfer method. <P>SOLUTION: The transfer sheet comprises a base film, a release layer and a transfer layer and, as the base film, a shrink film is used. In the transfer method, the transfer sheet is supplied so as to come into contact with the surface of the side peripheral wall of the molded object and heated immediately before transfer so as to change a heat distribution corresponding to the curvature of the cross-sectional peripheral surface of the side peripheral wall and pressed by a press roller to bond the transfer layer to the peripheral surface of the side peripheral wall and the base film is subsequently peeled. Further, in the molded object, the pattern is transferred to the side peripheral wall formed by the curved surface such as the rotary surface of the planar curved line or the oval surface to decorate the molded object. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer for decorating the curved surface of the side wall surface of a molded product having a curved surface such as an elliptical surface or a plane curved surface of revolution, and a side wall formed of a spherical surface. The present invention relates to a sheet, a transfer method, and a molded product decorated by the transfer method.

[0002]

2. Description of the Related Art It has been known in the past to transfer a picture pattern onto a side peripheral surface of a cylindrical curved body using a transfer sheet (see, for example, Patent Documents 1 and 2).

[0003]

[Patent Document 1] JP-A-6-79998

[Patent Document 2] Japanese Patent Laid-Open No. 9-193600

[0004]

Generally, when the transfer target has a cylindrical shape or a rectangular tube shape whose corners are circular arcs, and the transfer sheet is used to transfer to the surface of the side peripheral wall extending in the axial direction, The transfer sheet comes into line contact with the surface of the side peripheral wall to perform transfer.

However, in a side peripheral wall formed by an elliptical surface like a drum or a plane of revolution of a plane curve, in order to bring the transfer sheet into line contact in the width direction, a vertical cut section including the axis of the side peripheral wall is formed. It is necessary to press with a pressing roller having an outer peripheral surface that is a rotation surface formed by rotating a possible plane curve around an axis parallel to the axis of the side peripheral wall.

In the case of an elliptical surface such as a drum shape, the diameter of the outer periphery of the cross section of the molded body becomes smaller as it approaches the edge, and when the transfer sheet is wound, the contact length of the transfer sheet at the edge portion. There was a problem that it became shorter and wrinkled. Further, when the side peripheral wall peripheral surface is wavy in the axial direction or has a complicated curved surface, there is a similar problem that the outer diameter of the cross section is different and wrinkles occur in the small diameter portion. Therefore, it has been considered that transfer cannot be performed on a rotating surface of a plane curve or a curved surface such as an elliptic surface.

The present invention solves the above-mentioned problems, and a transfer sheet used for performing a smooth transfer on a side peripheral wall surface of a molded body in which the side peripheral wall has a curved surface such as a plane curved surface or an elliptic surface. It is an object of the present invention to provide a transfer method and a molded product having a pattern transferred by the transfer method.

[0008]

In order to solve the above problems, the present invention uses a shrink film as a base film in a transfer sheet comprising a base film, a release layer and a transfer layer as the transfer sheet. Is adopted.

As a specific embodiment, a decorative transfer sheet for a peripheral surface of a molded body having a curved surface such as a curved surface of a plane curve or an elliptic surface as a side peripheral wall, wherein the base film is in the feeding direction of the transfer sheet. The structure is characterized in that it is stretched in the same direction, or the structure in which the base film is biaxially stretched.

As an embodiment of the transfer layer, the transfer layer is composed of a top coat layer, a print layer on which a pattern is printed, and an adhesive layer, or the transfer layer is a top coat layer and an anchor. An underlayer, a metal vapor deposition layer, a structure characterized in that an adhesive layer is sequentially laminated, or a transfer layer, a topcoat layer, a print layer printed with a pattern, an anchor underlayer and a metal vapor deposition layer, The configuration is characterized in that the adhesive layer is sequentially laminated.

As a method for transferring the peripheral surface of the side wall of the molded body, there is provided a transfer method for decorating the peripheral surface of the molded body having a curved surface such as a plane curved surface or an elliptic surface as the side peripheral wall, in the sheet feeding direction. Using a transfer sheet using a shrink film stretched in the same direction as the base film, the transfer sheet is fed so as to be in contact with the surface of the side peripheral wall of the molded body, and immediately before transfer, the cross-section peripheral surface of the side peripheral wall The transfer sheet is heated so as to change the heat distribution according to the curvature, and is pressed by a pressing roller to adhere the transfer layer to the peripheral surface of the side peripheral wall, and subsequently peel off the base film. Adopt a configuration that does.

The molded body is a molded body having a side peripheral wall formed by a curved surface such as a plane curved rotating surface or an elliptic surface, and the side peripheral wall is stretched in the same direction as the transfer sheet feeding direction. The pattern is transferred using a transfer sheet using a shrinkable film as a base film, and decoration is applied.

The above-mentioned "molded article" is a container composed of a side peripheral wall having an open top end and a bottom wall, a container composed of a top surface and side peripheral wall having a spout, and a bottom wall, a mouth and a shoulder. The present invention includes articles such as a container, a container including a body, a peripheral wall and a bottom, a container lid, a hollow molded body, and a solid molded body.

The "plane curve rotation surface" is a quadratic curve such as a circle or an ellipse, or a curved surface formed by rotating a certain portion of another simple curve around a desired axis, or a plurality of different curves. A curved surface formed by rotating the connecting portion with a smooth connecting portion, and a special example in which a truncated cone formed by rotating a polygonal line is joined.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention will be described with reference to the drawings. Explaining the molded body of the present invention, as shown in FIG. 1, the molded body A is a drum-shaped molded body, and a side peripheral wall 1 formed by cutting an elliptical surface in a cross section orthogonal to the axial direction, It is composed of an opening 2 formed by upper and lower cut surfaces and a bottom plate 3. The pattern 4 is transferred and decorated on the surface of the side wall 1.

Next, a decoration method by transferring the molded body A to the surface of the side peripheral wall 1 will be described. First, the transfer sheet will be described. As shown in FIG. 2, the transfer sheet B includes a base film 6, a release layer 7, and a transfer layer 8, and the base film 6 uses PET as a material resin. It is a shrink film.

The shrink film is uniaxially stretched,
When the transfer sheet B is used, it is stretched in the same direction as the feeding direction. Further, the stretching is basically uniaxial, but depending on the curvature of the lateral cross-section peripheral surface of the side peripheral wall of the molded body,
It may have a certain proportion of stretching in the width direction.

The transfer layer 8 is a printed layer 9 on which a pattern is printed.
The print layer 9 includes various conventionally known structures. As an example of the print layer 9, as shown in FIG. 3, a single-color or multi-color print pattern 12 is formed on the surface (the lower surface in the figure) of the top coat layer 11.
It may be printed by gravure printing or silk screen printing.

Next, a molded body A using the transfer sheet B
The method of transfer to the will be described. FIG. 4 is a diagram showing a main part of the transfer device, in which 15 is an elastic pressing roller and 16 is a hot air heating device. The elastic pressing roller 15 has, as an outer peripheral surface, a plane curved rotational surface that appears in a vertical cutting plane including the axial center of the side peripheral wall 1 of the molded body A so as to make line contact with the surface of the side peripheral wall 1 of the molded body A. It is formed by an elastic body.

The hot air heating device 16 changes the temperature of the hot air in the width direction so that the central part of the transfer sheet B is low and the peripheral part is high in temperature. Is changing. Further, the transfer device includes a molded body holding device, a guide roller for the transfer sheet B, a pulling roller and the like (not shown). The molded body holding device is
The molded body A is held so as to be rotatable around its axis.

The transfer sheet B is supported between the side peripheral wall 1 of the molded body A and the elastic pressing roller 15, and is intermittently fed by the pulling roller every time it is transferred to the molded body A.

At the time of transfer, the entire width of the transfer sheet B is sent via a guide roller so as to contact the surface of the side peripheral wall 1 of the molded body A, and the elastic pressing roller 15 transfers the transfer sheet B at a constant pressure. Press on the surface of. Immediately before that, hot air is blown by the hot air heating device 16 so that the transfer sheet B is heated so that the peripheral portion has a high temperature and the central portion has a low temperature, and the base film 6 contracts and deforms into the shape of the surface of the molded body side peripheral wall 1. , The adhesive layer 10 is adhered to the surface of the side peripheral wall 1.

Then, the transfer layer 8 is adhered to the surface of the molded body side peripheral wall 1 via the adhesive layer 10 by the pressing of the elastic pressing roller 15, and the base film 6 and the release layer 7 are separated from the transfer layer 8 and pulled. Sent by roller. Thus, the printing layer 9 on which the pattern 4 is printed is transferred to the surface of the side peripheral wall 1 and the molded body A can be decorated.

Next, the function and effect of the transfer sheet and transfer method of this embodiment will be described. A contraction film is used as the base film 6, and the transfer sheet B is heated by hot air immediately before transfer, so that the temperature distribution can be adjusted in the width direction of the transfer sheet B. Therefore, the transfer sheet B can be brought into close contact with the surface of the molded body side peripheral wall 1, and the transfer layer 8 is pressed against the surface of the molded body side peripheral wall 1 due to the shrinkage of the shrink film, so that the transfer layer 8 itself also becomes smooth on the molded body A surface. Transferred to obtain high quality decoration.

Next, a second embodiment of the transfer sheet will be described. In the second embodiment, a printed layer is provided with a vapor deposition layer. In FIG. 5, 6a is a base film, 7a is a release layer, and 8a is a transfer layer. The transfer layer 8a includes a print layer 9a including a top coat layer 20, an anchor base layer 21, and a metal vapor deposition layer 22, and an adhesive layer 23.

The base film 6a is the base film 6
Similarly to the above, the sheet is uniaxially stretched in the same direction as the feeding direction of the transfer sheet. An easily peelable resin is applied to the upper surface (lower surface in the figure) of the base film 6a to form the release layer 7a.

A top coat layer 20 for protecting the metal vapor deposition layer 22 is applied to the upper surface (lower surface in the figure) of the release layer 7a, and an anchor base layer 21 is applied to the upper surface thereof. Next, aluminum and other metals are vapor-deposited to form a metal vapor deposition layer 22.
Is formed. Upper surface of metal deposition layer 22 (lower surface in the figure)
Then, an adhesive is applied to form the adhesive layer 23, and the transfer sheet Ba shown in FIG. 5 is obtained.

The transfer sheet Ba is transferred to the molded body A by the same apparatus and method as in the first embodiment, and a decorative surface having a metallic luster is obtained. With regard to the metallic luster, silver, gold, and other desired colors can be produced by selecting the metal used for vapor deposition.

Further, the metal vapor deposition layer 22 is subjected to mask printing, the vapor deposition metal is partially dissolved with a solvent, and the lower surface thereof is subjected to base printing to obtain a decorative surface having the metal vapor deposition layer 22 as a pattern. be able to.

Next, a third embodiment will be described. In the third embodiment, a multicolor pattern layer and a vapor deposition layer are arranged in the printing layer. In FIG. 6, 6b is a base film, 7b is a release layer, and 8b is a transfer layer. The transfer layer 8b includes a top coat layer 20b, a multicolor pattern layer 24, and an anchor base layer 21.
b, a printed layer 9b including a metal vapor deposition layer 22b, and an adhesive layer 23b.

The transfer layer 8b is disposed on the upper surface (lower surface in the figure) of the release layer 7b, as in the first embodiment, and is coated with the top coat layer 20b, and then gravure printing or silk screen printing is performed. A multicolor pattern is printed by screen printing. From the top of printing (lower surface in the figure), the anchor base layer 21b of the metal vapor deposition layer 22b is applied.

Next, metal vapor deposition is performed to form a metal vapor deposition layer 22b. Finally, an adhesive is applied to the upper surface (lower surface in the figure) of the metal vapor deposition layer 22b to form the adhesive layer 23b, and the transfer sheet Bb is obtained.

The transfer sheet Bb is transferred by the same apparatus method as in the first embodiment, and transferred to the molded product A to obtain a multicolored pattern and a decorative surface made of metallic luster that surrounds the pattern. .

Next, examples of various molded articles provided with a printed pattern or a picture pattern composed of a metallic glossy surface using the transfer sheet of each of the above embodiments will be described. As shown in FIG. 7 (a), the first embodiment is a molded body Aa composed of four elliptical surfaces 30 cut at the top and bottom and a cut surface 31, and the connecting edge of each elliptic surface has a cross section. The curved surface 32 has an arc shape.

The transfer to the surface of the side peripheral wall is performed by using the same transfer method as the transfer sheets B, Ba and Bb described in the above-mentioned embodiment and employing the same transfer method. It is possible to obtain a high-quality decoration in which the pattern 33 is smoothly transferred to the surface of the feature.

The second embodiment relates to a molded body Ab having a round shape as shown in FIG. 7B, in which the side peripheral wall is formed of a plane curved rotating surface. The molded body Ab is
It has a mouth portion 35, a neck portion 36, and a body portion 37.

The transfer to the surface of the side peripheral wall is similarly performed by the same transfer method using the transfer sheets B, Ba and Bb of the above-mentioned embodiment, but the transfer sheet is heated by the bottom peripheral wall portion 37a of the body 37. By blowing hotter hot air to the part corresponding to the neck part 36 and shrinking the base film, the transfer layer is adhered to the surfaces of the mouth part 35, the neck part 36, and the body part 37, and the printed pattern or metallic luster on the surface. It is possible to obtain a high-quality decoration in which the picture pattern 38 such as a surface is smoothly transferred.

In the third embodiment, as shown in FIG. 7 (c),
It is a molded body Ac in which two conical bodies 39a and 39b, which are symmetrical, are vertically joined to each other so that the connecting portion of the side peripheral walls 40a and 40b has an arc surface 41. A printed pattern or a pattern 42 such as a metallic glossy surface is transferred to the surfaces of the cones 39a and 39b. The transfer to the surfaces of the side peripheral walls 40a and 40b is performed in the same manner as in the above-described embodiment, and the same effect can be obtained.

In the fourth embodiment, as shown in FIG. 7 (d),
The side wall 43 is formed of an elliptical surface, and an uneven surface 44 formed of a gently curved surface is provided on the surface of the side wall 43. The transfer to the surface of the side peripheral wall 43 is performed in the same manner as in the above-described embodiment, and the printed pattern or the picture pattern 45 such as a metallic glossy surface is also transferred to the surface of each uneven surface 44, so that the uneven pattern and high-quality decoration are provided. Can be obtained.

In addition to the above-mentioned embodiment, the side wall surface may be a polyhedron in which minute planes are arranged along the circumferential surface, and as the quadric surface, a unilateral hyperboloid is used in addition to the elliptic surface. be able to.

[0041]

Since the present invention is constructed as described above, it has the following effects. Since a shrink film is used as the base film of the transfer sheet and the heating of the transfer sheet is changed according to the curvature of the curved surface, the transfer sheet should be adhered to the curved surface such as a plane curved surface or an elliptical surface. Is now possible.

As a result, it is possible to transfer a printed pattern or a picture pattern such as a glossy surface formed by metal deposition onto a curved surface, and it is possible to obtain high-quality decoration.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a molded body according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a transfer sheet according to the first embodiment.

FIG. 3 is an explanatory diagram of an example of a transfer sheet.

FIG. 4 is an explanatory diagram of a transfer device and a transfer method of the present invention.

FIG. 5 is an explanatory diagram of a transfer sheet according to a second embodiment.

FIG. 6 is an explanatory diagram of a transfer sheet according to a third embodiment.

FIG. 7 is an explanatory view of an example of the molded body, and (a) to (d) are perspective views of the molded body according to the example.

[Explanation of symbols]

A, Aa, Ab, Ac, Ad molded products B, Ba, Bb transfer sheet 1, 40a, 40b, 43 Side wall 4, 33, 38, 42, 45 Design pattern 6,6a, 6b Base film 7, 7a, 7b Release layer 8, 8a, 8b Transfer layer 9, 9a, 9b Printing layer 10, 23, 23a Adhesive layer 11, 20, 20b Top coat layer 12 printed patterns 15 Elastic pressing roller 16 Hot air heating device 21, 21b Anchor underlayer 22, 22b metal vapor deposition layer 24 Multicolor picture layer 30 oval surface 31 cut surface 32 curved surface 35 mouth 36 neck 37 torso 37a Bottom wall portion 39a, b cone 41 arc surface 44 uneven surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuyuki Imaizumi             3-6 Oshima, Koto-ku, Tokyo Co., Ltd.             Yoshino Industry Office (72) Inventor Hiroshi Yoshikawa             3-6 Oshima, Koto-ku, Tokyo Co., Ltd.             Yoshino Industry Office F term (reference) 3B005 EB01 EB05 EC11 FA17 FB11                       FB21 FB42 FB53 FE03 FE08                       FE21 FF04 FF06 GA02 GA04                       GB01 GC02

Claims (8)

[Claims] 1. A transfer sheet comprising a base film, a release layer and a transfer layer, wherein a shrink film is used as the base film. 2. A transfer sheet for decorating a peripheral surface of a molded body, which has a curved surface such as a plane curved surface of revolution or an elliptic surface as a side peripheral wall, wherein the base film is stretched in the same direction as the transfer sheet feeding direction. The transfer sheet according to claim 1, wherein the transfer sheet is provided. 3. The transfer sheet according to claim 1, wherein the base film is biaxially stretched. 4. The transfer sheet according to claim 1, wherein the transfer layer comprises a top coat layer, a print layer on which a pattern is printed, and an adhesive layer. 5. The transfer sheet according to claim 1, wherein the transfer layer comprises a topcoat layer, an anchor base layer, a metal vapor deposition layer, and an adhesive layer, which are sequentially laminated. 6. The transfer layer, wherein a topcoat layer, a print layer on which a pattern is printed, an anchor base layer, a metal vapor deposition layer, and an adhesive layer are sequentially laminated.
The transfer sheet according to item 3. 7. A transfer method for decorating a peripheral surface of a molded body having a curved surface such as a curved surface of a plane curve or an elliptic surface as a side peripheral wall, wherein the shrink film is stretched in the same direction as the sheet feeding direction. Using a transfer sheet with the base film as the base film, the transfer sheet is fed so as to contact the surface of the side wall of the molded product, and immediately before transfer, the heat distribution is changed according to the curvature of the lateral cross section of the side wall. Then, the transfer sheet is heated and pressed by a pressing roller to bond the transfer layer to the peripheral surface of the side peripheral wall,
Subsequently, the base film is peeled off, and the transfer method to the peripheral surface of the side peripheral wall of the molded body is characterized. 8. A shrinkable film having a side peripheral wall formed by a curved surface such as a plane curved rotating surface or an elliptical surface, the side peripheral wall being stretched in the same direction as the transfer sheet feeding direction. A molded product, wherein a pattern is transferred using a transfer sheet using as a base film and decorated.