JP2019030993A - Transfer sheet, manufacturing method of transfer sheet, and manufacturing method of decorative formed article - Google Patents

Abstract

To provide a transfer sheet that enhances the reading property of a pattern for position alignment and can transfer a transfer layer at an accurate position of a material to be transferred.SOLUTION: A transfer sheet 100 includes a transfer layer 20 on a release sheet 10, and the release sheet 10 has a base material layer 11 including a first area Rto transfer the transfer layer to a material to be transferred and a second area Rto provide a position alignment pattern. The second area Rof the base material layer 11 includes a convex part 4 on the surface side of the transfer layer 20, and the transfer layer 20 has, on the surface of the opposite side to the release sheet 10, a position alignment pattern AL including a followingly protruding part 23 with the convex part 4 as a base, a height h of the convex part 4 being 1.0 to 6.0 μm, a clearance d between the ends of the convex part 4 being 10 to 500 μm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transfer sheet, a transfer sheet manufacturing method, and a decorative molded product manufacturing method.

In the fields of household appliances, automobile interior parts, general goods, etc., the surface of an article may be decorated by a transfer method.
In the transfer method, a transfer sheet in which a transfer layer composed of a release layer, a design layer, an adhesive layer, etc. is formed on a base material is brought into close contact with an article to be transferred, and then the base material is peeled off. In this method, only the transfer layer is transferred to the surface of the transfer product to decorate.

In the transfer method, by adjusting the configuration of the transfer layer, it is possible to give a glossy feeling to an article to be transferred, or conversely, to reduce the glossiness and give a matte feeling.
For example, Patent Document 1 discloses a release layer containing a matting agent entirely on a base sheet, a mask layer partially containing an active energy ray-curable resin, a release layer and a design layer as a transfer layer. A partial mat transfer sheet characterized in that is formed is disclosed.

Japanese Patent No. 5095598

When the transfer layer is transferred onto the surface of the article to be transferred, alignment is extremely important as described in paragraph 0034 of Patent Document 1.
2. Description of the Related Art Conventionally, in the printing field or the like, alignment is performed by printing a registration pattern called a registration mark and reading the pattern with a sensor. Also in the transfer method, it is conceivable to perform alignment by printing a pattern for alignment in this way.

  However, there is a problem that it is difficult to print an alignment pattern at an accurate location on the transfer sheet, and it is difficult to transfer the transfer layer to an accurate position on the transfer object. In the first place, when the pattern for alignment is printed after the transfer sheet is completed, there is a problem that the number of processes is increased and it is complicated.

  In order to solve the above problem, the present inventors have proposed in Japanese Patent Application No. 2006-168148 that a pattern for alignment is arranged on a release sheet. Further, as a result of further investigation by the present inventors, in this configuration, when the alignment pattern is read, it is difficult to recognize the pattern due to the layer stacked on the alignment pattern. There was a room for improvement.

  The present invention has been made in view of such a situation, and improves the readability of the pattern for alignment, and the transfer sheet capable of transferring the transfer layer to the exact position of the transfer object, and the production of the transfer sheet It is an object of the present invention to provide a method and a method for producing a decorative molded product using the transfer sheet.

That is, the present invention provides the following [1] to [3].
[1] A transfer sheet having a transfer layer on a release sheet, the release sheet having a first area for transferring to a transfer target and a second area for providing an alignment pattern. The second layer of the base material layer has a convex portion on the surface side of the transfer layer, and the transfer layer has the convex surface on the surface opposite to the release sheet. A pattern portion for alignment having a follow-up projecting portion based on the portion, the height h of the convex portion is 1.0 to 6.0 μm, and an interval d between the end portions of the convex portion is 10 A transfer sheet that is ˜500 μm.
[2] A step of applying a resin layer forming ink containing an ionizing radiation curable resin composition on a support to form an uncured resin layer, and complementary to the first region and the second region Using a plate having a shape, an uncured resin layer is shaped and simultaneously irradiated with ionizing radiation to cure the shaped resin layer, and a release layer is formed on the cured resin layer A step of applying an ink for forming a release layer, a step of applying a protective layer forming ink containing an ionizing radiation curable resin composition on the release layer, and forming a protective layer; The method for producing a transfer sheet according to [1], comprising: applying an adhesive layer forming ink on the layer to form an adhesive layer.
[3] A method for producing a decorative molded product, comprising: a step of transferring the transfer layer of the transfer sheet according to [1] to a transfer target; and a step of peeling the release sheet of the transfer sheet.

  ADVANTAGE OF THE INVENTION According to this invention, the readability of the pattern for alignment is improved, the transfer sheet which can transfer a transfer layer to the exact position of a to-be-transferred object, the manufacturing method of this transfer sheet, and the decoration using this transfer sheet A method for producing a molded article can be provided.

It is sectional drawing which shows one Embodiment of the transfer sheet of this invention. It is a top view which shows one Embodiment of the transfer sheet of this invention. It is a top view which shows one Embodiment whose pattern for alignment of this invention is a linear structure. It is a top view which shows one Embodiment whose alignment pattern of this invention is a dot-shaped structure. It is a top view which shows one Embodiment of the transfer sheet of this invention. It is a top view which shows one Embodiment of the pattern for the alignment which has a colored layer of this invention. It is a top view which shows one Embodiment of the pattern for the alignment which has a colored layer of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. However, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in light of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[Transfer sheet]
As shown in FIG. 1, a transfer sheet 100 according to an embodiment of the present invention is a transfer sheet having a transfer layer 20 on a release sheet 10, and the release sheet 10 is transferred to an object to be transferred. the first region R ₁ and having a base layer 11 having a second region R ₂ for providing the positioning pattern, the second region R ₂ of the base layer 11, the surface side of the transfer layer 20 side of the The transfer layer 20 includes an alignment pattern portion AL having a follow-up protruding portion 23 based on the convex portion 4 on the surface opposite to the release sheet 10.

<Release sheet>
The release sheet 10 includes a base material layer 11 and a release layer 3. The release sheet 10 is peeled off after the transfer layer 20 is transferred to a transfer object such as a resin molded body.

(Base material layer)
The base material layer 11 is formed from the support body 1 and the resin layer 2, for example, as shown in FIG. The base material layer 11 may be a single layer of the support 1 or the resin layer 2, or may have a configuration of three or more layers having layers other than the support 1 and the resin layer 2.
Further, although not shown, the base material layer 11 may further have other regions on the surface on the transfer layer 20 side.

<Support>
As the support 1, polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, vinyl resins such as ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol copolymer, polyethylene terephthalate, Represented by polyester resins such as polyethylene naphthalate and polybutylene terephthalate, acrylic resins such as poly (meth) methyl acrylate and poly (meth) ethyl acrylate, styrene resins such as polystyrene, nylon 6 or nylon 66, etc. And a plastic film made of a resin such as a polyamide-based resin.
Among these plastic films, a biaxially stretched polyester film having excellent heat resistance and dimensional stability and excellent alignment suitability is preferable.

The thickness of the support 1 is preferably 12 to 150 μm and more preferably 25 to 100 μm from the viewpoints of moldability, shape followability, and handling.
In this specification, numerical values related to height, roughness, width, and thickness are average values of values measured ten times unless otherwise specified.

  The surface of the support 1 may be preliminarily subjected to physical treatment such as corona discharge treatment or oxidation treatment, or application of a coating material called an anchor agent or a primer in order to enhance the adhesion with the resin layer 2 or the like. .

<Resin layer>
The resin layer 2 is preferably formed of a resin component containing a solid content such as a thermoplastic resin, a cured product of a thermosetting resin composition, and a cured product of an ionizing radiation curable resin composition. The resin component used for forming the resin layer 2 preferably has a solid content of 20 to 100% by mass, more preferably 25 to 95% by mass, and even more preferably 30 to 90% by mass.
Among the above resin components, a cured product of an ionizing radiation curable resin composition that is excellent in strength and capable of giving an accurate and precise shape because it is instantly cured is preferable. In addition, from the viewpoint of easily obtaining the effect of the ionizing radiation curable resin composition, it is preferable to include 70 mass% or more of a cured product of the ionizing radiation curable resin composition among all the resin components constituting the resin layer 2. More preferably, 90% by mass or more is included, more preferably 95% by mass or more, and still more preferably 100% by mass.

Resin layer 2 may be formed by coating, accurately and in terms of forming a precise shape, by printing using a plate having a first region R ₁ and the second region R ₂ and the complementary shape It is preferable to form. When the resin layer 2 has other regions, the plate preferably further has a shape complementary to the other regions. Details of the method of forming the resin layer 2 using a plate will be described later.

Examples of the thermoplastic resin include acrylic resins, cellulose resins, urethane resins, vinyl chloride resins, polyester resins, polyolefin resins, polycarbonate, nylon, polystyrene, and ABS resins.
The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating. Examples of the thermosetting resin include acrylic resins, urethane resins, phenol resins, urea melamine resins, epoxy resins, unsaturated polyester resins, silicone resins, and the like. In the thermosetting resin composition, a curing agent is added to these curable resins as necessary.

The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter also referred to as “ionizing radiation curable compound”). Examples of the ionizing radiation curable functional group include an ethylenically unsaturated bond group such as a (meth) acryloyl group, a vinyl group, and an allyl group, an epoxy group, and an oxetanyl group.
As the ionizing radiation curable resin, a compound having an ethylenically unsaturated bond group is preferable. Further, from the viewpoint of suppressing damage to the resin layer in the process of producing a transfer sheet, the ionizing radiation curable resin is more preferably a compound having two or more ethylenically unsaturated bond groups, and in particular, an ethylenically unsaturated group. A polyfunctional (meth) acrylate compound having two or more saturated bonding groups is more preferable. As the polyfunctional (meth) acrylate compound, any of a monomer and an oligomer can be used.
The ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules, and usually ultraviolet (UV) or electron beam (EB) is used. Electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams can also be used.

Among the polyfunctional (meth) acrylate compounds, bifunctional (meth) acrylate monomers include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, 1,6-hexane. Examples thereof include diol diacrylate.
Examples of the tri- or higher functional (meth) acrylate monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, di Examples include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate.
The (meth) acrylate-based monomer may be modified by partially modifying the molecular skeleton, and is modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like. Can also be used.

Moreover, examples of the polyfunctional (meth) acrylate oligomer include acrylate polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate.
Urethane (meth) acrylate is obtained by reaction of polyhydric alcohol and organic diisocyanate with hydroxy (meth) acrylate, for example.
A preferable epoxy (meth) acrylate is a (meth) acrylate obtained by reacting (meth) acrylic acid with a tri- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin or the like. (Meth) acrylates obtained by reacting the above aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins and the like with polybasic acids and (meth) acrylic acid, and bifunctional or higher functional aromatic epoxy resins, It is a (meth) acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin or the like with a phenol and (meth) acrylic acid.
The ionizing radiation curable resin can be used alone or in combination of two or more.

When the ionizing radiation curable resin is an ultraviolet curable resin, the resin layer forming ink preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator.
Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethyl ketal, benzoylbenzoate, α-acyloxime ester, thioxanthones, and the like.
The photopolymerization accelerator can reduce polymerization inhibition by air during curing and increase the curing speed. For example, p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, etc. One or more selected may be mentioned.

  Although the thickness of the resin layer 2 is not specifically limited, It is preferable that it is 1-15 micrometers, It is more preferable that it is 2-12 micrometers, It is further more preferable that it is 3-10 micrometers.

(First area)
The first region R ₁ of the base layer 11 is a region for providing the transfer layer 20 to be transferred to the transfer target.
Surface shape of the first region R ₁ is not particularly limited. Surface shape of the first region R ₁ is, for example, as shown in FIG. 1, may have an irregular shape, it may be substantially smooth.
As shown in FIG. 1, when the uneven portion 5 is provided in the first region R ₁ , a transfer layer 20 having a shape complementary to the uneven portion 5 (the release layer 3 on the uneven portion 5 is included in the transfer object. , The transfer layer 20) having a concavo-convex complementary shape alleviated by the release layer 3 is transferred, and the concavo-convex shape can be imparted to the surface of the resulting decorative molded product.
Further, when the surface shape of the first region R ₁ is substantially smooth, increasing the substantially can be made smooth, gloss resulting decorative molded article surface shape of the transfer layer 20 has been transferred to the transfer target Can do.

Because different according to the surface shape for imparting the decorative molded article, the absolute value of the degree of irregularities in the first region R ₁ is not particularly limited, the maximum height roughness Rz is 0.2~4.0μm It is preferable to set the degree. Similarly, the arithmetic average roughness Ra is preferably about 0.05 to 2.0 μm.
In the present specification, the maximum height means the maximum height roughness Rz of JISB0601: 2001 at a cutoff value of 0.8 mm, and the average roughness means the arithmetic of JISB0601: 2001 at a cutoff value of 0.8 mm. Mean average roughness Ra. In the present specification, numerical values related to height and roughness are average values of values measured at 10 locations unless otherwise specified.

Although not shown, it may be formed by dividing the first region R ₁ to two or more locations. In that case, it may be each of the first region R ₁ of the surface shape as different. The first region R ₁ and formed by dividing into two or more portions, further, by making the respective first region R ₁ of the surface shape different, it is possible to enhance the design property of the decorative molded article.

(Second area)
The second region R ₂ of the base material layer 11 is a region for providing the for alignment used to transfer the transfer target pattern (alignment marks).
The second region R ₂ has a convex portion 4 that is partially disposed to the basis of the alignment pattern. The convex part 4 is preferably formed in the resin layer 2 by shaping using a plate having a shape complementary to the second region R ₂ from the viewpoint of forming an accurate and precise shape.

The height h of the convex part 4 is 1.0-6.0 micrometers. When the height h of the convex portion 4 is less than 1.0 μm, it is difficult to maintain the shape of the convex portion 4 every time the convex portion 4 is laminated, and the convex portion 4 is formed on the surface of the transfer layer 20. It becomes difficult to form the follow-up protrusion 23 as a base. If the follow-up protrusion 23 based on the convex portion 4 cannot be formed on the surface of the transfer layer 20, the photoelectric sensor cannot detect the light amount difference between the convex portion and the concave portion, and the pattern position for alignment is determined. It cannot be detected. In addition, since the height h of the convex portion 4 is more than 6.0 μm, when laminating on the convex portion 4, the contact pressure of the convex portion 4 becomes high and a lot of ink rides on the convex portion 4, The skirt of the layer laminated on the convex portion 4 is likely to spread, and light is diffused at the skirt to adversely affect the alignment. And since the height h of the convex part 4 is over 6.0 μm, the convex part 4 may be deformed by a load when it is stacked on the convex part 4. It becomes difficult to maintain the accuracy of alignment.
The height h of the convex portion 4 is preferably 1.5 to 5.5 μm, more preferably 2.0 to 5.0 μm, from the viewpoint of forming the follow-up protrusion 23 having a desired shape. More preferably, it is 2.5-4.5 micrometers.
The heights h of the protrusions 4 need not all be the same. However, from the viewpoint of facilitating uniform formation of the height H of the tracking protrusion 23, it is preferable that all the heights h of the protrusions 4 be the same or approximate values.
In addition, in this specification, the height h of the convex part 4 refers to the reference surface of the base material layer 11 having a cross section obtained by cutting the structure forming the convex part 4 in a direction perpendicular to the extending direction of the structure. The height of the center.

The distance d between the end portions of the convex portion 4 is 10 to 500 μm. When the distance d between the end portions of the convex portion 4 is less than 10 μm, a skirt is formed due to the influence of ink dripping between the end portions of the convex portion 4 when laminating on the convex portion 4. It becomes difficult to maintain the accuracy of alignment. Further, the tracking protrusions 23 based on the protrusions 4 adjacent to the surface of the transfer layer 20 may be connected to each other, and if the individual tracking protrusions 23 cannot be recognized, the alignment accuracy is maintained. Difficult to do. In addition, since the distance d between the end portions of the convex portion 4 is more than 500 μm, the contact pressure of the convex portion 4 becomes high when laminating on the convex portion 4, and a large amount of ink is carried on the convex portion 4. The skirt of the layer laminated on the convex portion 4 tends to spread, and light is diffused at the skirt to adversely affect the alignment. By spacing d of ends of the convex portion 4 is 500μm greater than the alignment mark is increased, it is necessary widely reserved unnecessarily second region area of R _2, is a design problem is there.
Interval d of ends of the convex portion 4 to improve the recognition rate of the alignment mark, from the viewpoint of suppressing the area of the second region R ₂ is wider than necessary, is preferably 15～450Myuemu, More preferably, it is 20-400 micrometers, and it is still more preferable that it is 25-350 micrometers.
In addition, in this specification, the space | interval d of the edge parts of the convex part 4 means the distance between the terminal ends of the skirt of the convex part 4. FIG.

The ratio h / d between the height h of the convex part 4 and the distance d between the end parts of the convex part 4 is preferably 0.003 to 0.100, and preferably 0.005 to 0.080. More preferably, it is further preferably 0.007 to 0.060.
By setting the ratio h / d within the above range, the balance between the height h of the convex portion 4 and the distance d between the end portions of the convex portion 4 becomes good, and a skirt is formed between the end portions of the convex portion 4. This makes it difficult to perform positioning and improves the alignment accuracy.

The width b of the convex portion 4 is preferably 5 to 200 μm, more preferably 10 to 150 μm, and still more preferably 15 to 100 μm. By setting the width b of the convex portion 4 to 5 μm or more, the strength of the convex portion 4 can be maintained, and the convex portion 4 can be easily formed uniformly. Further, by setting the width b of the protrusion 4 and 200μm or less, that the area of the second region R ₂ is wider than necessary it can be suppressed.
In addition, in this specification, as shown in FIG. 3, when the structure which forms the convex part 4 is a linear structure, the width | variety b of the convex part 4 is a direction orthogonal to the extending | stretching direction of a structure. The width of the cut section. And the width b of the convex part 4 means the width | variety of the cross section cut | disconnected in the major axis direction of the structure, when the structure which forms the convex part 4 is a dot-like structure, as shown in FIG. .

The ratio h / b between the height h of the convex portion and the width b of the convex portion is preferably 0.010 to 0.050, more preferably 0.015 to 0.045, and 0.020. More preferably, it is -0.040.
By the ratio h / b 0.010 or more, it can suppress the area of the second region R ₂ is wider than necessary. Further, by setting the ratio h / b to 0.050 or less, it is possible to easily form the follow-up protrusion 23 that maintains the shape of the protrusion 4.

The convex part 4 can be formed from a line-shaped structure, a dot-shaped structure or the like extending in an arbitrary direction, and is preferably formed from a line-shaped structure. The arbitrary direction is not particularly limited and may be an oblique direction (for example, 45 degrees with respect to the width direction of the transfer sheet), but is preferably a direction parallel to any one side of the transfer sheet 100. The flow direction of the transfer sheet 100 is more preferable. By making the convex portion 4 have this configuration, alignment can be facilitated.
Moreover, it is preferable that each direction of the some convex part 4 is parallel.
Further, the convex portion 4 may be formed continuously without interruption in any direction in the second inner region R _2, but may be one that extends in any direction partially interrupted.

  The cross section obtained by cutting the structure forming the convex portion 4 in a direction orthogonal to the extending direction of the structure is preferably substantially rectangular.

It is preferable that the convex part 4 and the transfer layer 20 described later satisfy the relationship of [height of convex part / thickness of the transfer layer] of 0.1 to 5.0, preferably 0.1 to 3.5. It is more preferable to satisfy | fill a relationship, and it is still more preferable to satisfy | fill the relationship of 0.1-1.0.
By setting the ratio to 0.1 or more, it is possible to easily form the tracking protrusion 23 based on the protrusion 4 on the surface of the transfer layer 20. Further, by setting the ratio to 5.0 or less, the convex portion 4 is not easily deformed by a load, and the alignment accuracy can be easily maintained.

Transfer sheet 100 of the present embodiment may have a second region R ₂ of two or more. If a second region R ₂ of two or more, it is preferable to change the role of each area. For example, when having a plurality of second regions R _2, either one aligns the width direction, it is preferably configured to perform the alignment of the flow direction in the other. By configuring the second region R ₂ as described above, it is possible to align in both directions in the width direction and the flow direction, thereby improving the accuracy of alignment.
In the transfer sheet 100 of the present embodiment, as shown in FIG. 2, the second region R ₂ is provided on both sides of the first region R ₁ , and the alignment pattern portion (alignment mark) AL is the uneven portion 5. It is preferable to be provided on both sides. Since the alignment pattern portion AL is provided on both sides of the uneven portion 5, the position in the width direction of the alignment pattern portion AL with respect to the uneven portion 5 can be changed regardless of the number of times the transfer sheet 100 is rewound. Therefore, the alignment accuracy can be increased, and the productivity can be improved.

The second region R ₂ are transferred to the transfer target, preferably be removed at the stage to obtain a decorated molded article. The timing of removing the second region R _2, for example, (1) during the step of slitting the transfer sheet 100 to the long, (2) during the step of stamping the transfer sheet 100 to the sheet, (3) transfer sheet For example, a trimming process after 100 is transferred to a transfer object. The transfer layer 20 from the viewpoint of transferring the exact position of the object to be transferred, it is preferable to remove the second region R ₂ at the timing of (3).

(Release layer)
The release sheet 10 of the transfer sheet 100 is formed so as to be peelable at the interface with the transfer layer 20 when it is in close contact with the transfer object. In order to improve the releasability, the release sheet 10 preferably has the release layer 3 on at least a part of the surface in contact with the transfer layer 20. Further, from the viewpoint of uniform release property within the surface of the transfer sheet 100, the release sheet 10 has a release layer 3 on the entire surface on the side in contact with the transfer layer 20, as shown in FIG. It is preferable.

When the first region R ₁ has the concavo-convex portion 5, the concavo-convex portion is relaxed by forming the release layer 3 on the concavo-convex portion 5, and a concavo-convex shape with less high-frequency components is formed on the surface of the decorative molded product. It is possible to suppress whitening and glare of the decorative molded product.
Here, “glare” refers to a phenomenon in which minute luminance variations are seen in image light due to the uneven structure on the surface. That is, by forming the release layer 3 on the concavo-convex portion 5, glare can be suppressed when the decorative molded product is used on the front surface of a display element such as a liquid crystal display element.

The release layer 3 is preferably mainly composed of a resin.
The resin of the release layer 3 is not particularly limited as long as it has a predetermined film strength and has a low adhesive strength with the transfer layer 20, and is a general-purpose thermoplastic resin, a cured product of a thermosetting resin composition, Examples include a cured product of an ionizing radiation curable resin composition. Specifically, fluorine resin, silicone resin, acrylic resin, polyester resin, polyolefin resin, polystyrene resin, polyurethane resin, cellulose resin, vinyl chloride-vinyl acetate copolymer resin, nitrified cotton Etc.
Among these, the hardened | cured material of a thermosetting resin composition is preferable, and the thermosetting resin composition which is a polyurethane-type resin containing an acrylic polyol and isocyanate is more preferable.

  The release layer 3 may further contain a release agent in order to improve the release property. Examples of the mold release agent include waxes such as synthetic wax and natural wax. The synthetic wax is preferably a polyolefin wax such as polyethylene wax or polypropylene wax.

  The thickness of the release layer 3 is preferably 0.1 to 5.0 μm, more preferably 0.2 to 3.0 μm, and still more preferably 0.3 to 1.0 μm.

(Other layers)
The release sheet 10 may have other layers.
Examples of other layers include an antistatic layer. When the release sheet 10 has an antistatic layer, it is possible to suppress the release charge when the release sheet is peeled off, and to improve the transfer workability.

(Antistatic layer)
The antistatic layer preferably contains an antistatic agent such as an electron conductive antistatic agent or an ion conductive antistatic agent, and a binder resin.
The antistatic layer is preferably formed on the surface of the release sheet opposite to the surface in contact with the transfer layer.
The antistatic layer preferably has a surface resistivity adjusted to a range of 1.0 × 10 ⁻⁹ Ω / □ to 1.0 × 10 ⁻¹² Ω / □.
An antistatic agent may be contained in another layer such as a resin layer to exhibit antistatic properties.

<Transfer layer>
A transfer layer 20 is formed on at least a part of the release sheet 10.
The transfer layer 20 is a layer to be transferred to the transfer object, and includes, for example, a protective layer 21 and an adhesive layer 22 in order from the side closer to the release sheet 10 as shown in FIG. The transfer layer 20 has a tracking protrusion 23 based on the protrusion 4 on the surface.
The transfer layer 20 is preferably formed on the entire surface of the release sheet 10 as shown in FIG.

Each layer such as the protective layer 21 and the adhesive layer 22 constituting the transfer layer 20 is prepared by, for example, adjusting ink containing the constituent components of each layer and applying a coating method such as a gravure coating method or a roll coating method on the release sheet 10. It can be formed by coating and drying by a printing method such as gravure printing or screen printing, and curing by irradiation with ionizing radiation as required.
The ink for forming the transfer layer for forming the transfer layer 20 has a solvent ratio of 90% by mass or less from the viewpoint of facilitating formation of the follow-up protrusion 23 that follows the protrusion 4. Is preferred.

The height H of the follow-up protrusion 23 is preferably 1.0 to 10.0 μm, more preferably 1.5 to 9.0 μm, and further preferably 2.0 to 8.0 μm. .
By setting the height H of the tracking protrusion 23 to 1.0 μm or more, it becomes easy to detect the light amount difference between the convex portion and the concave portion in the alignment performed by the photoelectric sensor. Further, by setting the height H of the tracking protrusion 23 to 10.0 μm or less, the tracking protrusion 23 is not easily deformed by a load, and the alignment accuracy can be easily maintained.
The heights H of the following protrusions 23 need not be the same. However, in the alignment performed by the photoelectric sensor, it is preferable that the heights H of the follow-up protrusions 23 are all the same or approximate values from the viewpoint that the detection of the light amount difference between the convex portions and the concave portions is uniform and easy.
In the present specification, the height H of the follow-up protrusion 23 refers to the height of the central portion of a cross section obtained by cutting the structure forming the follow-up protrusion 23 in a direction perpendicular to the extending direction of the structure. Say.

(Protective layer)
The protective layer 21 has a role of protecting the decorative molded product from abrasion, light, chemicals, and the like after the transfer layer 20 is transferred from the transfer sheet 100 to the transfer target.
If having a concave-convex portion 5 release sheets first region R ₁ of 10, protective layer 21 having a complementary shape to the irregular shape is imparted to the surface of the decorative molded article. Further, when the first region R ₁ of the release sheet 10 is substantially smooth, it can be surface substantially smooth protective layer 21 is applied to the surface of the decorative molded article, increasing the gloss of the decorative molded article.

The protective layer 21 preferably contains a resin component such as a thermoplastic resin, a cured product of a thermosetting resin composition, and a cured product of an ionizing radiation curable resin composition as a main component. The main component means 50% by mass or more of the total solid content constituting the protective layer, and the ratio is preferably 70% by mass or more, and more preferably 80% by mass or more.
Among the resin components, a cured product of an ionizing radiation curable resin composition having excellent strength is preferable. In addition, from the viewpoint of improving the effect of the ionizing radiation curable resin composition, it is preferable that 70% by mass or more of the cured product of the ionizing radiation curable resin composition is included in the total resin components constituting the protective layer. More preferably, it is contained more than 95 mass%, more preferably more than 95 mass%, and still more preferably 100 mass%.
The transfer layer forming ink for forming the protective layer 21 preferably has a solvent ratio of 60 to 90% by mass or less from the viewpoint of facilitating the formation of the follow-up protrusion 23 that follows the protrusion 4. It is more preferably 65 to 90% by mass, and further preferably 70 to 90% by mass.

The embodiment of the resin component such as the ionizing radiation curable resin composition of the protective layer 21 is the same as the embodiment of the resin component of the resin layer 2 described above.
In addition, when using a thermosetting resin composition and / or an ionizing radiation curable resin composition as a material which forms the protective layer 21, from the viewpoint of moldability, at the time of forming the protective layer 21, a thermosetting resin is used. The composition and / or the ionizing radiation curable resin composition is left in a semi-cured state, and after being transferred to the transfer object, the curing of the thermosetting resin composition and / or the ionizing radiation curable resin composition proceeds. It is preferable to completely cure.

  The protective layer 21 may contain particles such as organic particles and inorganic particles. By containing particles in the protective layer 21, glare and defects can be made inconspicuous due to the expression of internal haze due to the difference in refractive index from the resin component. For the same purpose, these particles may be contained in an adhesive layer, an anchor layer, etc. described later.

Examples of the organic particles include particles made of polymethyl methacrylate, polyacryl-styrene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, silicone, fluorine resin, and polyester resin. Can be mentioned.
Examples of the inorganic particles include particles made of silica, alumina, antimony, zirconia, titania and the like.

The average particle diameter of the particles is preferably 0.05 to 5.0 μm, more preferably 0.5 to 3.0 μm.
In the present specification, the average particle diameter is a 50% particle diameter (d50: median diameter) when the particles in a solution are measured by a dynamic light scattering method and the particle diameter distribution is represented by a cumulative mass distribution. The 50% particle diameter can be measured using, for example, a Microtrac particle size analyzer (manufactured by Nikkiso Co., Ltd.).

  The content of the particles is preferably 0.1 to 20 parts by mass and more preferably 1 to 10 parts by mass with respect to 100 parts by mass of the resin component of the protective layer 21.

  The thickness of the protective layer 21 is preferably 0.5 to 30 μm, more preferably 1.0 to 20 μm, and 2.0 to 10 μm from the viewpoint of the balance between surface hardness and moldability. Is more preferable.

(Adhesive layer)
The adhesive layer 22 has a role of improving the transfer work by improving the adhesion between the transfer object 20 such as a resin molded body and the transfer layer 20.

  On the surface of the transfer layer 20, an alignment pattern portion AL having a tracking protrusion 23 based on the protrusion 4 is provided. When the adhesive layer 22 constitutes the surface of the transfer layer 20, an alignment pattern portion AL having a tracking protrusion 23 based on the convex portion 4 is provided on the surface of the adhesive layer 22. The following protrusion 23 is formed by following the protrusion 4 by providing the transfer layer 20 including the protective layer 21 and the adhesive layer 22 on the protrusion 4 provided on the release sheet 10. It is a part to do.

The adhesive layer 22 is preferably made of a heat sensitive or pressure sensitive resin suitable for the material of the transfer object. For example, when the material of the transfer object is an acrylic resin, it is preferable to use an acrylic resin. If the material of the transferred material is polyphenylene oxide / polystyrene resin, polycarbonate resin, or styrene resin, use an acrylic resin, polystyrene resin, polyamide resin, or the like that has an affinity for these resins. Is preferred. Furthermore, when the material of the transferred material is a polypropylene resin, it is preferable to use a chlorinated polyolefin resin, a chlorinated ethylene-vinyl acetate copolymer resin, a cyclized rubber, or a coumarone indene resin.
The adhesive layer 22 may contain additives such as an ultraviolet absorber and an infrared absorber. The ultraviolet absorber may be inorganic or organic, but an organic ultraviolet absorber is preferable from the viewpoint of excellent transparency. Examples of inorganic ultraviolet absorbers include titanium dioxide, cerium oxide, and zinc oxide. Examples of organic UV absorbers include benzotriazole UV absorbers, triazine UV absorbers, benzophenone UV absorbers, salicylate UV absorbers, benzoate UV absorbers, cyanoacrylate UV absorbers, hydroxy A phenyl triazine type ultraviolet absorber, a nickel chelate type ultraviolet absorber, etc. are mentioned. Examples of the infrared absorber include titanium oxide, zinc oxide, indium oxide, tin-doped indium oxide (ITO), tin oxide, antimony-doped tin oxide (ATO), and zinc sulfide metal oxide-based infrared absorber.
The ink for forming the adhesive layer for forming the adhesive layer 22 preferably has a solvent ratio of 80 to 90% from the viewpoint of easily forming the follow-up protruding portion 23 that follows the convex portion 4. It is more preferable that it is 85-90 mass%.

The thickness of the adhesive layer 22 is preferably 0.1 to 20 μm, more preferably 0.5 to 15 μm, and further preferably 1.0 to 10 μm.
The adhesive layer 22 may be configured to include two types of layers, an anchor coat layer and an adhesive layer. When the anchor coat layer and the adhesive layer are included, the thickness of the anchor coat layer is preferably 0.5 to 10 μm, more preferably 1.0 to 8.0 μm, and 2.0 to 6. More preferably, it is 0 μm. The thickness of the adhesive layer is preferably 0.1 to 10 μm, more preferably 0.5 to 8.0 μm, and still more preferably 1.0 to 5.0 μm.

(Colored layer)
Although the present invention can be aligned without a colored layer, a colored layer 30 may be provided on the follow-up protrusion 23 as shown in FIG.
The colored layer 30 is provided on the tracking protrusion 23 of the alignment pattern portion AL provided on the surface of the transfer layer 20. The colored layer 30 has a role of causing a contrast of light transmittance or light reflectance between a portion where the colored layer 30 is present and a portion where the colored layer 30 is not present in the alignment pattern portion AL.
When the transfer sheet 100 is observed from the plane direction, the colored layer 30 is disposed so as to be positioned at least at a part of the alignment pattern portion AL of the transfer layer 20 (adhesive layer 22) as shown in FIG. It is preferable to do.

As shown in FIG. 7, the colored layer 30 is preferably composed of three parts: a line portion 30 a, a solid coating center portion 30 b, and a solid coating portion 31.
The line portion 30a and the solid coating center portion 30b have different light transmittance or light reflectance, and the transfer sheet 100 can be aligned in an arbitrary process using the contrast of the light transmittance or light reflectance. It becomes. The light transmittance may be any of transmittance in the normal transmission direction, diffuse transmittance, and total transmittance. Similarly, the light reflectance may be any of transmittance in the regular reflection direction, diffuse reflectance, and total reflectance.
The ratio of the area of the line portion 30a in the colored layer 30 in the second region _{R 2} is preferably 15 to 85%, more preferably from 20% to 80%, more preferably from 30% to 70% . By setting the ratio of the area of the line portion 30a within the above range, the contrast of the light transmittance or the light reflectance between the solid coating center portion 30b and the solid coating portion 31 can be easily clarified, and the alignment accuracy can be improved. Can do.
Except the second region _{R 2} of the line portion 30a and the solid fill central portion 30b, it is preferable that the solid color portion 31. Areafill portion 31 may be wider than the second region R ₂ of the line portion 30a is wide is preferably easier to see more alignment pattern portion AL in different width.

The colored layer 30 is composed of, for example, a binder resin and a pigment.
As a pigment of the colored layer 30, it is preferable to include a pigment with high concealability. A black pigment such as carbon black is preferable as the pigment having high concealability.
Although it does not restrict | limit especially as binder resin of the colored layer 30, For example, (meth) acrylic resin, polyurethane resin, polyester resin, polyamide resin, (meth) acrylic acid ester-olefin copolymer resin, vinyl chloride resin, ethylene -Thermoplastic resins such as vinyl acetate copolymer resin (EVA resin), ionomer resin, olefin-α olefin copolymer resin fat; polyurethane resin, polyester resin, acrylic resin, epoxy resin, phenol resin, urea resin, polyester resin Curable resins such as melamine resin, alkyd resin, polyimide resin, silicone resin, amide functional copolymer, and the like. Here, the curable resin includes a thermosetting resin, an ionizing radiation curable resin, a two-component curable resin, and the like. The binder resin of the colored layer 30 is preferably a thermoplastic resin from the viewpoint of suppressing foil dust.
In addition, it is preferable that the colored layer 30 does not contain a hardening | curing agent from a viewpoint of blocking suppression.

The colored layer 30 can be formed, for example, by transferring the colored layer forming ink onto the tracking protrusion 23 of the alignment pattern portion AL by a transfer method such as fusion thermal transfer or sublimation thermal transfer. As a transfer method for forming the colored layer 30, fusion heat transfer is particularly preferable from the viewpoint of suppressing foil dust.
The colored layer 30 may also be formed by applying a coloring layer forming ink on the follow-up protruding portion 23 of the alignment pattern portion AL and then drying by a printing method such as gravure reverse printing or gravure printing. Can do. As a printing method for forming the colored layer 30, gravure reverse printing is particularly preferable.

  The thickness of the colored layer 30 is preferably 0.3 to 5.0 μm, and preferably 0.4 to 4.0 μm, from the viewpoint that the contrast for alignment needs to be adjusted. Is more preferable, and it is still more preferable that it is 0.5-3.0 micrometers.

(Other layers)
The transfer layer 20 may have other layers.
Examples of other layers include an anchor layer and a printing layer.

(Anchor layer)
The anchor layer is a layer provided as necessary to improve heat resistance when placed in a high temperature environment such as in-mold molding. The anchor layer is preferably formed between the protective layer 21 and the adhesive layer 22.

The anchor layer preferably contains a cured product of the curable resin composition.
Examples of the curable resin composition include a thermosetting resin composition and an ionizing radiation curable resin composition.
Embodiments of the thermosetting resin composition and the ionizing radiation curable resin composition of the anchor layer are the same as those of the thermosetting resin composition and the ionizing radiation curable resin composition of the resin layer.
The thickness of the anchor layer is preferably 0.1 to 6 μm, more preferably 0.3 to 5 μm, and further preferably 0.5 to 4 μm.
The anchor layer forming ink for forming the anchor layer preferably has a solvent ratio of 70 to 90% by mass or less from the viewpoint of facilitating formation of the follow-up protruding portion 23 that follows the convex portion 4. More preferably, it is -90 mass%, and it is further more preferable that it is 80-90 mass%.

(Print layer)
The transfer layer 20 may further have a printing layer. The printed layer has a role of imparting a desired design property to the decorative molded product.

Printed layer, when observed the transfer sheet 100 from the planar direction, is preferably disposed so as to be positioned on at least a portion of the first region R _1.
Further, the position in the thickness direction of the printing layer may be disposed on the adhesive layer 22, may be disposed between the adhesive layer 22 and the protective layer 21, or may be disposed between the protective layer 21 and the release layer. You may arrange | position between the sheets. From the viewpoint of protection of the print layer and adhesion to the transfer object, it is preferable to dispose the print layer between the adhesive layer 22 and the protective layer 21. Moreover, it is preferable to arrange a printing layer on the adhesive layer 22 from the viewpoint of handling a small lot product. In addition, when arrange | positioning a printing layer on the adhesive bond layer 22, the resin component of a printing layer is made into resin of the same system as the resin component of the adhesive bond layer 22 from a viewpoint of equalization of adhesiveness with a to-be-transferred material. It is preferable to use the same resin.

  The pattern of the printing layer is arbitrary, and examples thereof include wood grain, stone grain, cloth grain, grain grain, circle, square, polygon, geometric pattern, character, solid printing, and the like.

The printed layer preferably contains a binder resin such as a polyvinyl resin, a polyester resin, an acrylic resin, a polyvinyl acetal resin, or a cellulose resin, and a pigment and / or a dye.
The thickness of the printing layer is preferably 0.25 to 20 μm, more preferably 0.5 to 15 μm, and still more preferably 0.7 to 10 μm from the viewpoint of design.

  Note that alignment is important when forming the print layer, but the print layer can be formed at an accurate position by performing alignment using the alignment pattern portion AL.

[Transfer sheet manufacturing method]
In the method for producing the transfer sheet 100 according to the embodiment of the present invention, a resin layer forming ink containing an ionizing radiation curable resin composition is applied onto a support 1 to form an uncured resin layer 2. Then, using a plate having a shape complementary to the first region R ₁ and the second region R ₂ , the uncured resin layer 2 is shaped, and at the same time, the shaped resin layer 2 is irradiated with ionizing radiation. The step of curing the layer, the step of applying the release layer forming ink on the cured resin layer 2, the step of forming the release layer 3, and the step of applying the protective layer forming ink on the release layer 3. The step of forming the protective layer 21 and the step of applying the adhesive layer forming ink on the protective layer 21 to form the adhesive layer 22 are included.

Method for producing a transfer sheet 100 according to an embodiment of the present invention, on the second region R ₂ follower projecting portion 23 formed on a position corresponding to the adhesive layer 22, the ink is applied for coloring layer formation, It is preferable to further include a step of forming the colored layer 30. By further including the step of forming the colored layer 30, the transfer layer 20 having the colored layer 30 on the following protrusion 23 can be obtained.

A plate having a shape complementary to the first region R ₁ and the second region R ₂ is formed by engraving the surface of the cylinder into a desired shape by, for example, etching, sand blasting, cutting and laser processing, or a combination thereof. Can be obtained. Alternatively, laser engraving, by stereolithography or the like to prepare a plate of male long (plate having a first region R ₁ and the second region R ₂ and the same shape), a material obtained by inverting it to the surface of the cylinder It can be obtained by wrapping. The surface of these plates is preferably hard-plated with chromium or the like.

  The transfer sheet 100 is preferably manufactured with multiple impositions from the viewpoint of manufacturing efficiency. The transfer sheet 100 manufactured in such a multi-face manner is subjected to a transfer process as a long transfer sheet or a single sheet transfer sheet.

  The transfer sheet 100 manufactured by the above process detects the light amount difference between the convex portion and the concave portion, with the following protrusion 23 as a pattern for alignment being a convex portion, and between the end portions of the following protruding portion 23 as a concave portion. This makes it easier to align.

  Examples of the optional step of aligning include a step of slitting the transfer sheet 100 in a long length, a step of punching the transfer sheet 100 into a sheet, and a step of transferring the transfer sheet 100 to a transfer object. It is done.

As a step of reading the alignment pattern, the tracking protrusion 23 as the alignment pattern using the photoelectric sensor is used as a protrusion, and the end portions of the tracking protrusion 23 are used as a recess. It is preferable to include a first alignment step for detecting a difference in the amount of light and a second alignment step for detecting an alignment pattern using an image sensor.
In the first alignment step, the pattern position for alignment can be detected by detecting a light amount difference between the convex portion and the concave portion by a retroreflective laser sensor (photoelectric sensor). The amount of light detected by scattering of light at the convex portion decreases. The first alignment step can be performed even when the transfer sheet 100 is flowing, and is a simple alignment step for reading the pattern position for alignment.
In the second alignment step, light is emitted from the light source to the alignment pattern position detected in the first alignment step, and the specularly reflected light in the alignment pattern is measured by an image sensor such as a camera. Thus, the boundary between the convex portion and the concave portion can be detected. Based on the detected boundary between the convex and concave portions, the transfer sheet 100 can be aligned. The second alignment step is basically a step that is performed when the transfer sheet 100 is stopped, such as a step of punching the transfer sheet 100 into a sheet and a step of transferring the transfer sheet 100 to a transfer object. This is an alignment process for accurately reading a pattern for alignment.

In the case where the alignment is performed by the light transmittance by the colored layer 30 that is the pattern printing for alignment, for example, the light source installed below the transfer sheet 100 and the light source above the transfer sheet 100 are installed at positions facing the light source. Position detection can be performed by detection using an image sensor.
In the case where the alignment is performed by the light reflectance by the colored layer 30 that is the pattern printing for alignment, for example, the detection can be performed by a light source and an image sensor installed above the transfer sheet 100 at an arbitrary angle.

[Method of manufacturing decorative molded product]
The method for manufacturing a decorative molded product according to the embodiment of the present invention includes the step of transferring the transfer layer 20 of the transfer sheet 100 of the present invention described above to the transfer target and the release sheet 10 of the transfer sheet 100. And a process.
Examples of the material to be transferred include a resin molded body.

  The decorative molded product manufactured by the above process improves the readability of the pattern for alignment and can transfer the transfer layer to the exact position of the transfer object, so that the appearance after transfer can be improved. it can.

  A known transfer method can be used for the method of manufacturing the decorative molded product. For example, (i) a method in which a transfer sheet is attached to a preliminarily molded transfer object, the transfer layer of the transfer sheet is transferred, and then the release sheet of the transfer sheet is peeled off; A method of sticking a transfer sheet to a transfer material, transferring the transfer layer of the transfer sheet, peeling off the release sheet of the transfer sheet, and then forming a transfer material on which the transfer layer is laminated, (iii) ) A method of integrating a transfer material with a transfer sheet at the time of injection molding and then peeling the release sheet of the transfer sheet [in-mold molding (injection molding simultaneous transfer decoration method)]. Among them, according to in-mold molding (injection molding simultaneous transfer decoration method), it is possible to perform decorative molding on a resin molded body having a complicated surface shape such as a three-dimensional curved surface.

As one embodiment of the method for producing a decorative molded product using the transfer sheet of the present invention by in-mold molding, (1) the transfer layer side of the above-mentioned transfer sheet is arranged facing the inside of the mold for in-mold molding. And (2) a step of injecting and injecting a resin into the in-mold mold.
(3) a step of integrating the transfer sheet and the resin and transferring the transfer layer of the transfer sheet onto the surface of the resin molded body (transfer object); and (4) a resin molded body (transfer target). And the step of removing the release sheet of the transfer sheet after the product is taken out of the mold.
(1) If the second region R ₂ remains in the process arrangement, the transfer sheet is arranged at an accurate position of the mold using the alignment pattern portion of the second region R _2. be able to.
After the step (4), it is preferable to trim (remove) unnecessary portions as necessary. (4) When the second region R ₂ after step are still present, it is preferred to trim (remove) the region.

(Resin molding)
As the resin molding, it is preferable to use a thermoplastic resin or a thermosetting resin that can be injection-molded, and various known resins can be used.
When the decorative molded product according to the present invention is manufactured by in-mold molding, it is preferable to use a thermoplastic resin. Examples of such thermoplastic resins include polystyrene resins, polyolefin resins, ABS resins (including heat-resistant ABS resins), AS resins, AN resins, polyphenylene oxide resins, polycarbonate resins, polyacetal resins, acrylic resins, Examples thereof include polyethylene terephthalate resin, polybutylene terephthalate resin, polysulfone resin, and polyphenylene sulfide resin.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.

[Measurement and evaluation]
The transfer sheets prepared in the examples and comparative examples were measured and evaluated as follows. The results are shown in Table 1.

<Photoelectric sensor evaluation>
For the alignment marks on the transfer sheets prepared in Examples and Comparative Examples, the amount of light was measured using a retroreflective laser sensor (manufactured by Keyence, product name: LV-NH62) as a photoelectric sensor. The ratio of the measured amount of light at the location with the alignment mark to the amount of light at the location without the alignment mark was calculated, and the following evaluation was performed.
A: Less than 70% B: 70% or more and less than 90% C: 90% or more

<Image sensor evaluation>
An image processing system (manufactured by Keyence, product name: XG-8000) and a camera unit (manufactured by Keyence, product name: XG-200M) are combined with the alignment marks of the transfer sheets prepared in the examples and comparative examples. Used and evaluated. Specifically, coaxial alignment illumination was used as a light source, the alignment mark was irradiated with light, and an image was captured using an image sensor (2 million pixel area sensor). The following evaluation was performed on the imaging result of the alignment mark.
A: The boundary between the convex part and the concave part can be imaged clearly. B: The boundary between the convex part and the concave part can be imaged somewhat unclear. C: The boundary between the convex part and the concave part cannot be imaged.

Example 1
1. Production of Release Sheet On a polyethylene terephthalate film having a thickness of 75 μm, a resin layer forming ink having the following formulation was applied and dried to form an uncured resin layer having a thickness of 8.0 μm.
<Resin layer forming ink>
・ Ionizing radiation curable resin composition 40 parts by mass (made by Kyoei Chemical Co., Ltd., acrylic resin)
・ Photopolymerization initiator 3 parts by mass ・ Methyl ethyl ketone 60 parts by mass ・ Silicone leveling agent 0.5 parts by mass

Then, using a plate having the first region R ₁ and the second region R ₂ and the complementary shape, and at the same time the uncured resin layer to shape, by irradiating ionizing radiation a polyethylene terephthalate film side, A base material layer obtained by curing the shaped resin layer was obtained.
<First region _{R 1} and the complementary shapes>
· Smoothing <second region _{R 2} and the complementary shapes>
-Grooves having a shape complementary to the convex part: width 100 μm, depth 5.0 μm
・ Spacing between the ends of the groove: 300 μm
・ Number of grooves: 25 <Shape of shaped resin layer>
-Convex part: width 100 μm, height 3.0 μm
・ Spacing between the ends of the protrusions: 300 μm
・ Number of grooves: 24

Next, on the entire surface of the resin layer of the base material layer, a release layer forming ink having the following formulation was applied over the entire surface, and then dried at 40 ° C. for 72 hours to form a release layer having a thickness of 0.5 μm. A release sheet was obtained.
<Ink for forming release layer>
Acrylic polyol 70 parts by mass (manufactured by Soken Chemical Co., Ltd., trade name: Thermolac SU100A)
・ Isocyanate 25 parts by mass (Mitsui Chemicals, trade name: Takenate D-110N)
・ Ethyl acetate 161 parts by mass ・ Methyl isobutyl ketone 56 parts by mass

2. Preparation of transfer layer On the release sheet obtained in the above "1", a protective layer-forming ink having the following formulation was applied so that the adhesion amount after drying was 5.0 g / m ² to form a coating film. Then, using a fusion UV lamp system, the protective layer was semi-cured by irradiating the light source under the conditions of an H bulb, a conveyance speed of 20 m / min, and an output of 40%. The integrated light quantity at this time was 15 mJ / m ² when measured by an illuminance meter (trade name: UVPF-A1) manufactured by Eye Graphics.
<Protective layer forming ink>
・ 70 parts by mass of urethane acrylate UV curable resin composition (manufactured by Dainichi Seika Co., Ltd., trade name: Seika Beam HT-X)
(Solid content 35%, toluene / ethyl acetate mixed solvent)
-30 parts by mass of urethane acrylate ultraviolet curable resin composition (manufactured by Dainichi Seika Co., Ltd., trade name: Seika Beam EXF-HT-1)
(Solid content 40%, toluene / methyl ethyl ketone mixed solvent)

Next, the anchor layer forming ink having the following formulation was applied onto the protective layer so that the amount of adhesion after drying was 3.0 g / m ^2, and after forming a coating film, the film was dried at 40 ° C. for 72 hours and cured. An anchor layer having a thickness of 2 μm was formed.
<Ink for anchor layer formation>
Acrylic polyol 100 parts by mass (manufactured by Dainichi Seika Co., Ltd., trade name: TM-VMAC, solid content 25%)
(Toluene / ethyl acetate / methyl ethyl ketone mixed solvent)
-10 parts by mass of xanthethylene diisocyanate (manufactured by Dainichi Seika Co., Ltd., trade name: PTC-RC3)
(Solid content 75%, solvent: ethyl acetate)
・ Solvent 65 parts by mass (Methyl ethyl ketone, diluted so that the solid content is 22%)

Next, an adhesive layer forming ink having the following formulation was applied onto the anchor layer so that the adhesion amount after drying was 2.5 g / m ² to form a coating film. The coating film was dried to form an adhesive layer having a thickness of 2 μm to obtain a transfer sheet.
<Ink for forming the adhesive layer>
-100 parts by mass of acrylic resin (manufactured by Dainichi Seika Co., Ltd., trade name: TM-R600, solid content 20%)
(Ethyl acetate / n-propyl / methyl ethyl ketone mixed solvent)
・ Methyl ethyl ketone 40 parts by mass ・ Hydroxyphenyl triazine ultraviolet absorber 1.28 parts by mass (trade name: Tinuvin 479, manufactured by BASF)

<The shape of the tracking protrusion formed on the adhesive layer>
・ Height of the following protrusion: 3.0 μm

(Examples 2-5, Comparative Examples 1-4)
A second region R ₂ shown in Table 1 by using a plate having a complementary shape, and at the same time the uncured resin layer to shape, by irradiating ionizing radiation a polyethylene terephthalate film side, with vehicle resin layer Except having been hardened, it carried out similarly to Example 1, and obtained the transfer sheet of Examples 2-5 and Comparative Examples 1-4.

  The transfer sheet of the present invention can be suitably used for the production of decorative molded products such as communication devices such as cellular phones, information devices inside automobiles, and home appliances.

1: Support 2: Resin layer 3: Release layer 4: Convex portion 5: Concavity and convexity portion 10: Release sheet 11: Base material layer 20: Transfer layer 21: Protective layer 22: Adhesive layer 23: Follow protrusion 30 : Colored layer 100: Transfer sheet

Claims (12)

A transfer sheet having a transfer layer on a release sheet,
The release sheet has a base layer having a first region for transferring to a transfer object and a second region for providing an alignment pattern, and in the second region of the base layer, A convex portion on the surface side of the transfer layer,
The transfer layer is provided with a pattern part for alignment having a follow-up protruding part based on the convex part on the surface opposite to the release sheet,
The height h of the convex part is 1.0 to 6.0 μm,
The transfer sheet has an interval d between ends of the convex portions of 10 to 500 μm.   The transfer sheet according to claim 1, wherein a ratio h / d between a height h of the convex portion and a distance d between the end portions of the convex portion is 0.003 to 0.100.   The transfer sheet according to claim 1, wherein a width b of the convex portion is 5 to 200 μm.   The transfer sheet according to any one of claims 1 to 3, wherein a ratio h / b between a height h of the convex portion and a width b of the convex portion is 0.010 to 0.050.   The transfer sheet according to claim 1, wherein a height H of the following protrusion is 1.0 μm or more.   The transfer sheet according to claim 1, further comprising a colored layer on the following protrusion.   The transfer sheet according to any one of claims 1 to 6, wherein the release sheet has a release layer on at least a part of a surface in contact with the transfer layer.   The transfer sheet according to claim 1, wherein the transfer layer has a protective layer on the release sheet side.   The transfer sheet according to claim 8, wherein the protective layer includes a cured product of an ionizing radiation curable resin composition. Applying a resin layer forming ink containing an ionizing radiation curable resin composition on a support, and forming an uncured resin layer;
Using a plate having a shape complementary to the first region and the second region, forming an uncured resin layer and simultaneously irradiating with ionizing radiation to cure the shaped resin layer;
A step of applying a release layer forming ink on the cured resin layer, and forming a release layer;
Applying a protective layer forming ink containing an ionizing radiation curable resin composition on the release layer, and forming a protective layer;
The manufacturing method of the transfer sheet of Claim 1 including the process of apply | coating the ink for adhesive bond layer formation on the said protective layer, and forming an adhesive bond layer.   The transfer sheet according to claim 10, further comprising a step of applying a colored layer forming ink on a follow-up protruding portion formed at a position corresponding to the second region in the adhesive layer to form a colored layer. Production method.   Production of a decorative molded product, comprising: a step of transferring the transfer layer of the transfer sheet according to any one of claims 1 to 9 to a transfer target; and a step of peeling the release sheet of the transfer sheet. Method.