JP3295858B2 - Transfer film with improved transfer layer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matte transfer film which has a good film-cutting property at the time of transfer and enables efficient transfer operation.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a matte suede tone by a transfer method, a resin to which a resin bead pigment of coarse particles (the most frequent particle size of particle size distribution is about 10 to 40 μm) is used is used. A matte transfer film was produced by coating the material film, but the coating film became brittle and the abrasion resistance was reduced as compared with the case of using only the binder. In order to improve the scratch resistance of the matting resin, a resin with elasticity and strong film forming power (polyurethane resin such as urethane elastomer) was used. When the film was peeled off, the transfer layer was not completely cut at the peripheral edge of the object to be transferred, and burrs were formed as shown in FIG. 1A, and a post-process for removing the burrs became necessary.

[0003]

SUMMARY OF THE INVENTION In a transfer film in which a matting resin layer containing a resin bead pigment is formed on a formable film (a film having a fine uneven pattern for matting on the surface of a base film), Since the resin with strong film forming power is used to improve the abrasion resistance of the eraser resin layer, the strength of the coating film becomes strong, and when the shaping film is peeled off at the time of transfer, the transfer layer becomes Burrs as shown in FIG. 1A occur without being completely cut at the periphery. Therefore, a step of removing the burrs is required, and the working efficiency is reduced. From the above background, there has been a demand for a transfer film having good scratch resistance of the matte resin layer and good cut-off property of the film when transferred to an object to be transferred. An object of the present invention is to provide a transfer film which meets this demand and has improved film-cutting properties.

[0004]

A transfer film comprising at least a matting resin layer containing a resin bead pigment and an adhesive layer as a transfer layer on the surface of a substrate film, wherein the matting resin has a particle size. Silica or sedimentable barium sulfate of 0.1 μm or less was added in an amount of 0.25 to 0.5% by weight to improve the cut-off property of the transfer layer. Further, at least as a transfer layer on the surface of the base film, a matte resin layer containing a resin bead pigment, a pattern layer and an adhesive layer laminated on the transfer film, the adhesive layer having a particle size of 0.1 μm or less Of silica or precipitated barium sulfate was added in an amount of 1 to 2% by weight to improve the film breakability of the transfer layer. When the amount of silica or precipitated barium sulfate added to the matting resin or the adhesive layer is more than the above amount, the surface glossiness (degree of matting)
Or the scratch resistance deteriorates. If the amount is less than the above-mentioned amount, the effect of improving film breakage is not obtained.

A base film, a binder resin, a bead pigment, an adhesive,
The fine particles and the like will be described. The base film may be a film having a matte resin layer and a peeling property, and the material of the base film is, for example, polyethylene terephthalate, polyester such as polybutylene terephthalate, polyethylene, polyolefin such as polypropylene, acrylic, polycarbonate, or poly. Arylate, polyamide, polyvinyl chloride, polystyrene, polyvinyl fluoride, polytetrachloroethylene, teflon, polyvinylidene fluoride,
Polyvinyl alcohol, polyether ether ketone,
Polyimide, cellophane film or the like alone, or those films are bonded together, or the resin is directly applied to form a laminated film, or composite with aluminum foil. Stretched polyethylene terephthalate film (hereinafter referred to as PET film) is most preferred.

For the purpose of enhancing the releasability of the matte resin layer from the matte resin layer, a resin such as acrylic, melamine, urethane, epoxy, polyester acrylate,
A release agent obtained by adding a release material such as a wax or silicone to a release resin such as a thermosetting or ionizing radiation-curable resin composed of urethane acrylate, 2-hydroxyethyl acrylate, neopentyl glycol diacrylate, or the like. A known release treatment can be performed by using this.

In the present invention, in order to further enhance the matting effect of the matting resin layer, as shown in FIG. 2, a film having a fine uneven pattern for matting on the surface of a base film (that is, a mold). Film). The method of sandblasting or chemical etching on the surface of the above base film, the method of kneading a matting agent in the base film, or the fine unevenness with the addition of a matting agent in the release agent It can also be provided by a method of forming a coating layer. The base film may be smooth without forming an uneven pattern on the surface.

[0008] As the binder resin, a thermosetting resin, a thermoplastic resin, an ionizing radiation curable resin, or the like is used. Examples of such a resin include resins such as acrylic, chelate-curable acrylic, and polyester urethane, epoxy-curable acrylic, acrylic urethane, urethane elastomer, polyester, acrylate, urethane acrylate, 2-hydroxyethyl acrylate, and neopentyl glycol diacrylate. And the like. As the binder resin, in addition to the above resins, acrylic resin,
A single substance such as a vinyl chloride / vinyl acetate copolymer, a rubber-based resin, cellulose nitrate, or a mixture thereof (a resin used for the adhesive) may be added. That is, by adding the same resin as the resin used for the adhesive layer to the binder resin, the adhesion between the matting resin and the adhesive layer can be improved.

As the binder resin, acrylic urethane, urethane elastomer and the like are preferable among the above in view of the scratch resistance and flexibility of the matting resin layer. Specifically, a linear resin having active hydrogen in the molecule is preferred. There is a thermoplastic polyurethane resin obtained by reacting a polyol with a compound having an isocyanate group in the molecule. As a linear polyol compound of a thermoplastic polyurethane resin, an addition reaction product of a diol compound having an aromatic or spiro ring skeleton and a lactone compound or a derivative thereof or an epoxy compound, a dibasic acid such as phthalic acid, and ethylene glycol Condensation products with polyols, and polyester polyols such as ring-opening polyester compounds derived from cyclic ester compounds, polytetramethylene ether glycol, polyethylene glycol, polyether polyols such as polypropylene glycol and polycarbonate polyols, polyester amide polyols and the like. No.

Examples of the compound having an isocyanate group of the thermoplastic polyurethane resin include toluene diisocyanate, diphenylmethane diisocyanate, paraphenylene diisocyanate, dimethyldiphenyl diisocyanate, dianisidine diisocyanate, naphthalene diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate. Examples thereof include diisocyanates such as tetramethylxylylene diisocyanate and isophorone diisocyanate, and modified isocyanates obtained by subjecting these isocyanate monomers to urethane modification with polyols such as diols and triols. In particular, isocyanates having a straight chain and a long main chain are more preferable because they can form a matte resin layer which is flexible and excellent in scratch resistance. The thermoplastic urethane resin has a molecular weight of 20,000. ~ 40,000 and Tg -40 ° C ~
Those at -30 ° C are preferred.

The adhesive may be an adhesive selected as appropriate according to the material of the object to be transferred, and is generally an acrylic resin, a vinyl resin, a rubber resin, a thermoplastic urethane resin, or a mixture thereof. Can be used. In particular, when a mixture of a urethane elastomer and a vinyl chloride / vinyl acetate copolymer is used as the matting resin, the adhesion is improved when a resin obtained by adding the vinyl chloride / vinyl acetate copolymer to the above resin in an amount of about 10 to 25% is used. Improved and more preferred. Further, the adhesive layer need not be formed particularly when a material having adhesiveness to the matting resin is used.

As fine particles to be added for improving film breakability, silica and precipitated barium sulfate are particularly good.
In addition, barium carbonate, zinc oxide, alumina, kaolinite and the like can also be used. The particle size is 0.1 μm or less, the addition amount is 0.25 to 0.5% by weight based on the matte resin layer,
Addition of 1 to 2% by weight of the adhesive layer makes the transfer layer appropriately brittle without affecting gloss (glossiness) and abrasion resistance, and can improve only film breakability. As the particle size of the fine particles, those having a most frequent particle size of 0.02 μm and a maximum particle size of 0.04 μm are preferable. Further, these fine particles can be added to both the adhesive layer and the matting resin layer.

[0013] Resin bead pigment is obtained by dispersing a fine powder of pigment in a synthetic resin into a granular form, and has a high matting effect. The matte can be seen from any direction. A suede-like surface can be formed.
Examples of the material of the bead pigment include Fe ₂ O ₃ and TiO.
₂ , CaCO ₃ , using a fine powder of ordinary pigment such as quinacridone, the surface of the fine powder, polyurethane, acrylic, epoxy, polyester, nylon, fluororesin, elastic resin such as vinyl chloride resin, or, If necessary, the resin may be covered with a material to which a plasticizer, a stabilizer, a surfactant or the like is added, or the pigment fine powder may be dispersed in the elastic resin.

The particle size of the bead pigment varies depending on the thickness of the matting resin layer to be formed.
８０80 μm and the most frequent particle size of the particle size distribution
It is more preferable to use a layer having a thickness in the range of 35 μm because the matte resin layer does not particularly impair the suede-like texture, and the coatability and adhesion of the decorative layer and the adhesive layer are improved. The most preferred bead pigments have a particle size of 13-4.
Examples include a 0 μm polyurethane resin bead pigment or an acrylic resin bead pigment. The color of the bead pigment is
It may be arbitrarily selected as desired, for example, using a colorless and transparent bead pigment, forming a deep matte resin layer, or combining two or more bead pigments, rich in multicolor variation A matte resin layer can be formed.

In the present invention, a decorative layer such as a picture layer and a metal vapor-deposited layer can be provided, if necessary, in order to impart design properties. These layers are provided on the surface of the matte resin layer or on one or both layers between the matte resin layer and the adhesive layer. However, when it is provided on the surface, a blank portion is provided to cover the matte surface.

[0016]

According to the present invention, the abrasion resistance hardly deteriorates practically without changing the surface glossiness. In addition, when the imprint film is peeled off, the transfer layer is reliably cut at the peripheral edge of the transfer-receiving member to remove burrs. It is possible to supply a transfer film that does not occur.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments with reference to the drawings and the like. FIG. 2 is a diagram showing the first embodiment. The coating liquid for the matte resin layer is a bead pigment (manufactured by Dainichi Seika Kogyo Co., Ltd .: most frequently used particle size: 23 μm) per 100 parts by weight of the binder resin (thermoplastic urethane elastomer).
(Urethane elastic beads) of 250 parts by weight was added to 0.25% by weight of silica having a most frequent particle size of 0.02 μm and a maximum particle size of 0.04 μm. Apply the above coating solution to a coating mat P having a thickness of 25 μm.
ET film (Kimoto Co., Ltd .: Releasable mat 101
On the surface of 7-6), the coating amount is 2
Coating was performed so as to be 5 g / m ² to form a matte resin layer. Next, a pattern is gravure-printed on the surface of the matting resin layer using a printing ink, and an adhesive (a mixture of acrylic and vinyl chloride / vinyl acetate copolymer at a weight ratio of 1: 1) is further applied. 25 g / 25 g
m ² and an adhesive layer was provided to prepare a matte transfer film. When this transfer film was roll-transferred to a polystyrene (hereinafter referred to as PS) molded product, as shown in FIG. 1 (b), the film was excellent in cut-off property, no burr was generated, and the burr removal step became unnecessary. . Accordingly, a swedish PS molded product having good workability and excellent surface properties and design properties can be obtained.

In the second embodiment, as shown in FIG. 3, after a release layer of an acrylic resin is formed on the PET film used in the first embodiment, the same suede ink as in the first embodiment is applied. Thus, a mat resin layer was formed. Next, a pattern is printed, and the coating amount at the time of drying is reduced to 20 g / m ² using an adhesive containing 1% by weight of silica having a most frequent particle size of 0.02 μm and a maximum particle size of 0.04 μm. A matte transfer film was prepared by coating as described above and transferred to a PS molded body. As a result, a suede-like molded product having more excellent film-cutting properties as compared with the first example and excellent surface properties and design properties as in the first example was obtained.

[0019]

According to the present invention, the scratch resistance is practically hardly degraded without changing the surface glossiness, and the transfer layer is reliably cut at the peripheral edge of the transfer object when the imprint film is peeled off. It is possible to supply a transfer film free from burrs. Also, the step of removing burrs on the transfer product is not required,
Work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which burrs are generated when a transfer film is transferred.

FIG. 2 is a configuration diagram of a transfer film manufactured in the first embodiment.

FIG. 3 is a configuration diagram of a transfer film manufactured in a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film 2 Transfer layer 3 Transfer object 4 Burr of transfer layer 21 Binder resin 22 Bead pigment 23 Silica having a particle size of 0.1 μm or less 24 Matte resin layer 25 Printing of pattern 26 Adhesive layer 31 Release layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B44C 1/165-1/17

Claims (2)

(57) [Claims] 1. A transfer film comprising at least a matting resin layer containing a resin bead pigment and an adhesive layer laminated on a surface of a base film as a transfer layer, wherein the matting resin has a particle size of 0.1 μm or less. A matte transfer film, characterized by adding 0.25 to 0.5% by weight of silica or precipitated barium sulfate to improve the cut-off property of the transfer layer. 2. A transfer film comprising a matte resin layer containing a resin bead pigment and an adhesive layer laminated on a surface of a base film as a transfer layer, wherein the adhesive layer has a particle size of 0.1 μm or less. Of silica or precipitated barium sulfate
A matte transfer film characterized in that the addition of 〜2% by weight has improved the film breakability of the transfer layer.