JP3103097B2 - Matte transfer foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a matte transfer foil for imparting a matte surface having excellent scratch resistance to the surface of an object to be transferred.

[Conventional technology]

2. Description of the Related Art Conventionally, in various fields such as furniture, building materials, and weak electricity, making a product surface matte has been performed as one of product designs.

Conventionally, as a means for matting the product surface, a method of directly applying a matting paint obtained by adding a bead pigment to a binder resin on the product surface has been used. This kind of matte paint is also called a suede-like paint because it uses a bead pigment and can form a matte surface like soft suede leather.

However, matte paints using bead pigments (sued-like paints) require a long-time baking process to cure the paints because of the use of a two-part curable urethane resin as the binder resin, and workability is poor and heat resistant. It is difficult to apply to a plastic product having low property, and since it is applied directly to the surface of the product, there is a problem that coating unevenness on the surface easily occurs and it is difficult to obtain a uniform and beautiful matte surface. In addition, a porous material such as paper absorbs paint and is difficult to apply, and there is a problem that the material for forming a matte surface is limited.

As a method of solving the above problems and providing a matte surface to a wide range of materials, a transfer foil having a matte surface provided in advance on a transfer layer is formed, and the product surface is used as a transfer object using this transfer foil. There is known a so-called transfer method in which a transfer layer of a transfer foil is transferred to impart a matte surface to a transfer object.

The matte transfer foil (matte transfer foil) used in the above transfer method is formed from a release substrate film and a transfer layer laminated on the surface of the base film, and the transfer layer is matte. Consisting of a resin layer and an adhesive layer laminated on the resin layer,
After transferring the above-mentioned transfer layer to a product, when the substrate film is peeled off, the surface of the transferred body becomes a matte surface.

The conventional matte transfer foil is formed by coating the matte resin layer surface with a matte paint in which bead pigments such as acrylic beads and nylon beads are dispersed in a binder resin on the matte resin layer. As the binder resin, for example, 1) a lacquer-type resin, 2) a chelate-modified acrylic resin or a mixture thereof and an acrylic resin, 3) an isocyanate-curable resin, and the like have been used.

[Problems to be solved by the invention]

However, the conventional matte transfer foil is excellent in productivity because of less foil burr when the lacquer type resin of the above 1) is used as a binder resin in the matte resin layer. However, there is a problem that the scratch resistance is poor.

When the chelate-modified acrylic resin of the above 2) is used, the physical properties, which were the problems of 1), are improved in abrasion resistance, but are still insufficient in abrasion resistance.
When the isocyanate-curable resin of the above 3) is used,
The adhesion between the matte resin layer and the adhesive layer is low, it is easy to peel off between the adhesive layer and the transfer layer under normal transfer conditions, and the matte resin layer is easily peeled from the surface of the transferred object was there.

The present invention has been made in view of the above points, and has as its object to provide a transfer foil having excellent scratch resistance on the surface of a matting resin layer containing bead pigments.

[Means for solving the problem]

The present invention relates to a transfer foil in which a transfer layer having a matting resin layer containing a bead pigment on the surface of a substrate sheet is laminated, wherein the matting resin layer has a linear polyester polyol having an active hydrogen in a molecule and an isocyanate compound. A matte transfer foil comprising a urethane elastomer made of a thermoplastic urethane resin obtained by the reaction with

Further, the matte resin layer may contain a vinyl chloride-vinyl acetate copolymer resin.

The present invention laminates an adhesive layer on the surface of the matte resin layer,
The matte transfer foil described above, in which the adhesive layer contains 10 to 15% by weight of a vinyl chloride-vinyl acetate resin, can also be used.

Further, as the transfer foil of the present invention, a shaping film having fine matte unevenness on the surface of the substrate sheet can be used.

Further, as the above-mentioned shaping film, a film provided with a fine uneven coating layer made of a releasable binder resin to which fine particles having a spherical shape or a spherical shape are added can be used.

Further, the fine uneven coating layer is in a surface state in which the center of gravity of the fine particles protrudes from the average level surface of the release layer, and the surface gloss value (75 ° incidence) is 0.5 to 2.5 and the surface roughness is 0. .
What is 8-30 micrometers can also be used.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing an example of the transfer foil of the present invention.

The matte transfer foil 1 of the present invention is a transfer foil in which a transfer layer 6 in which a matte resin layer 4 containing bead pigments 3 and an adhesive layer 5 are sequentially stacked on the surface of a base sheet 2 is provided. The matting resin layer 4 contains a urethane elastomer. Note that the adhesive layer 5 does not need to be provided, and can be provided as needed.

The urethane elastomer used for the matte resin layer of the matte transfer foil of the present invention is a thermoplastic polyurethane resin obtained by reacting a linear polyol having an active hydrogen in a molecule with a compound having an isocyanate group in a molecule. is there. As the above-mentioned linear polyol compound, 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 a polyol such as ethylene glycol; Condensation products, and polyester polyols such as ring-opening polyester compounds derived from cyclic ester compounds, polytetramethylene ether glycol,
Examples include polyether polyols such as polyethylene glycol and polypropylene glycol, and polycarbonate polyols and polyesteramide polyols. Examples of the isocyanate include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), paraphenylene diisocyanate (PHDI), and dimethyl diphenyl diisocyanate (TOD
I), dianisidine diisocyanate (DADI), naphthalene diisocyanate (NDI), dicyclohexylmethane diisocyanate (HMDI), cyclohexyl diisocyanate (CHDI), hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMDI), meta-xylylene diisocyanate (XDI ),
Tetramethylxylylene diisocyanate (TMXDI),
Diisocyanates such as isophorone diisocyanate (IPDI), or polyisocyanates obtained by urethane-modifying these diisocyanate monomers with triol or the like;
Modified isocyanates modified to allophanate, biuret, isocyanurate and the like can be mentioned. The isocyanate is more preferably a linear one having a long main chain, since a matte resin layer having flexibility and excellent scratch resistance can be obtained.

As the urethane elastomer, those having a molecular weight of 20,000 to 40,000 and a Tg of −40 to −30 ° C. can be used, and are most preferable.

The matting resin layer 4 may be formed by adding another resin to the above resin. For example, an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a rubber-based resin, a resin such as cellulose nitrate or a mixture thereof may be used. These resins may be added in an amount of about 5 to 25% based on the urethane elastomer. it can. Preferably has a molecular weight of 15000-35000 and Tg
The addition of a vinyl chloride-vinyl acetate copolymer resin at 75 to 85 ° C. to the urethane elastomer is 10 to 20%.

The bead pigment 3 is obtained by dispersing a fine powder of pigment in a synthetic resin and molding it into granules. The bead pigment 3 has a high matting effect and is matte when viewed from any direction, and forms a suede-like surface with a particularly soft texture. be able to. As a material of the bead pigment 3, for example, a fine powder surface of an ordinary pigment such as Fe ₂ O ₃ , TiO ₂ , CaCO ₃ ,
Disperse into a resin with elasticity, such as epoxy, polyester, nylon, fluororesin, vinyl chloride vinyl acetate copolymer, or a material to which a plasticizer, a stabilizer, a surfactant, etc. are added if necessary, and granulate What was done. The particle size of the bead pigment 3 varies depending on the thickness of the matting resin layer to be formed. However, when the particle size distribution is 5 to 80 μm and the distribution maximum is in the range of 10 to 35 μm, In particular, the coatability of the adhesive layer and the adhesion to the substrate are improved without impairing the suede-like texture of the matte resin layer, which is more preferable. Most preferred bead pigments are polyurethane resin beads or acrylic resin beads having a particle size of 1.3 to 40 μm. The color of the bead pigment 3 may be selected as desired. For example, a colorless and transparent bead pigment may be used to form the deep matte resin layer 4, or a combination of two or more bead pigments may be used. A rich matte resin layer 4 can be obtained.

The matting resin layer 3 may be arbitrarily colored with a material other than the above-mentioned bead pigment in order to enhance the matting effect.

The adhesive layer 5 can be provided by using an adhesive appropriately selected according to the material of the transfer object. Generally, an acrylic resin, a rubber-based resin, a thermoplastic urethane resin, or the like can be used alone or in combination. When a mixture of a urethane elastomer and a vinyl chloride-vinyl acetate copolymer is used as the matte resin layer 4, the adhesive layer 5 becomes
It is more preferable to use a resin obtained by adding 10 to 25% by weight of the vinyl acetate copolymer to the above resin because the adhesion between the matting resin layer 4 and the adhesive layer 5 is improved.

The base sheet 2 may be a sheet having an appropriate release property from the matting resin layer 4, and the material of the base sheet 2 is, for example, polyester, polyethylene, polypropylene, polyamide, acryl, polycarbonate, polyacrylate, or poly. Vinyl chloride, polyethylene terephthalate, polystyrene, polyvinyl fluoride, polytetrachloroethylene, teflon, polyvinylidene fluoride, polyvinyl alcohol, polyether ether ketone, polyimide,
Polybutylene terephthalate, a film composed of cellophane alone or the like, or those films are appropriately bonded to each other, or the resin is directly applied to form a laminated film, or a composite film of aluminum foil or the like. Among them, a polyester film is most preferable. Further, the base sheet 2 is made of a resin such as acryl, melamine, urethane, epoxy or the like with a releasing agent obtained by adding a releasing material such as wax or silicone to a resin such as acrylic, melamine, urethane or epoxy for the purpose of enhancing the releasing property from the matting resin layer. Known release processing can be performed.

As the matte transfer foil 1 of the present invention, a shaping film in which fine matte irregularities 7 are provided on the surface of the base sheet 2 can be used. The fine irregularities 7 are used to further enhance the matting state of the surface of the matting resin layer 4 using the bead pigment. In order to provide the fine irregularities 7 on the shaping film,
For example, a method of kneading a matting agent into a raw material resin of a base sheet to form a sheet, a method of performing sandblasting or chemical etching on the surface of the base sheet, a method of coating a resin containing a matting agent on the surface of the base sheet And the like.

As shown in FIG. 2, the matte transfer foil 1 of the present invention has, as a shaping film 8, a finely uneven coating layer 11 formed by adding fine particles 9 having a spherical or similar shape to a binder resin 10.
Can be provided on the surface of the base sheet 2 to form the fine irregularities 7. The fine uneven coating layer 11 of the shaping film 8 has a surface gloss value of 0.5 to 2.5% and a surface roughness of 0.8 to 30.
When it is μm, finer and more severe irregularities are formed on the matting resin layer 4 provided on the shaping film 8, and a more excellent suede-like appearance can be provided. preferable.

The surface gloss value in this case is measured by a specular gloss measurement method according to JISZ8741. Further, as shown in FIG. 3, the surface roughness is expressed by a distance from a position H where the fine particles 9 of the fine uneven coating layer 11 does not exist to a maximum protruding portion Y where the fine particles 9 of the coating film exist. It was done.

The fine uneven coating layer 11 is made of a composition obtained by adding spherical or spherical-like fine particles 9 to a binder resin 10 and the center of gravity X of the fine particles 9 is adjusted to the average level H of the binder component coating film.
And the protrusions at the locations where the fine particles 9 are present can be formed so as to spread outward.

The shape of the fine particles 9 is generally spherical, and in addition, an ellipse, eggplant, or a rotating body obtained by rotating a cardioite about a symmetric axis, which is similar to a spherical shape having a smooth surface. Is used. The material of the fine particles 9 is
For example, silica, alumina, calcium carbonate, precipitated barium sulfate, clay, silas barium, benzoguanamine, talc and the like can be mentioned. The particle size of these fine particles 9 is 0.
It is about 8 to 30 μm, preferably about 1.0 to 30 μm. The amount of the fine particles 9 added to the binder resin 10 can be appropriately determined according to the surface gloss value of the coating layer 11 and the like.

The binder resin 10 only needs to have good adhesiveness to the base sheet 2 and good release property to the matte resin layer 4 when the shaping film 8 is peeled off. Examples of the material of the binder resin 10 include a thermoplastic resin and an electron beam curable resin. As the electron beam curable resin, polyester acrylate, urethane acrylate, 2-hydroxyethyl acrylate, neopentyl glycol diacrylate, and the like are preferable.

The fine uneven coating layer 11 has fine particles of silica, silicone,
Using a matting agent such as alumina, and using a thermosetting acrylic / urethane copolymer or mixed resin as the binder resin can form the transfer surface with excellent matting agent holding power, matte state, and low gloss. Is most preferable because it is easily obtained.

The transfer foil for matting of the present invention may be provided with a decorative layer such as a printed picture layer (partly or entirely solid) and a metal vapor deposition layer, if necessary.

In producing the matte transfer foil of the present invention, first, a base sheet 2 having a desired surface shape is prepared, and then a matte resin layer 4 and, if necessary, an adhesive layer 5 are formed on the surface of the base sheet 2. Are laminated.

In forming the matting resin layer 4, the matting ink (Sweed) is prepared by mixing the bead pigment 3, the urethane elastomer and other resins and additives as needed, adding a solvent, a diluent, and the like as appropriate, and dispersing well. Ink) on the surface of the base sheet 2 by a coating method such as comma coating or roll coating or a printing method such as screen printing.
Heat and dry if necessary.

In imparting a matte appearance (a suede-like appearance) to the transfer-receiving body using the suede-like transfer foil of the present invention, as shown in FIG. At the same time, after applying pressure or heating as required, the shaping film 8 is peeled off, so that a matte surface (a suede-like surface) 14 can be provided on the surface of the transfer-receiving body 13.

The matte transfer foil of the present invention, using various transfer methods such as simultaneous transfer molding, thermal transfer, and transfer simultaneously with injection molding,
A matte surface having excellent design properties can be imparted to various types of transfer-receiving bodies. The transfer receiving body 13 capable of imparting a matte state to the surface using the matte transfer foil of the present invention includes materials such as paper, plastic, and metal, and the shape thereof is a sheet, a plate, a three-dimensional shape, and a molded product. Etc. Particularly suitable transfer material is a paper containing beads pigments, which is absorbent when applied directly, and paper that causes formation unevenness, or is distorted or stretched when applied directly because of poor heat and solvent resistance. ,
Polyvinyl chloride, acrylic, AB
Plastic such as S.

Next, the present invention will be described in more detail with reference to specific examples.

Example 1 100 parts by weight of a urethane elastomer (molecular weight: 25000, Tg: -30 ° C.) on a surface of a 25 μm-thick coating mat PET film (a release mat 1017-6 manufactured by Kimoto Co., Ltd.), vinyl chloride-vinyl acetate Copolymer (molecular weight: 26000,
Tg: 75 ° C) Suede ink (Sweed Ink No. 2 manufactured by Showa Ink Kogyo Co., Ltd.) consisting of 10 parts by weight and 125 parts by weight of beam pigment is applied with a comma coater to a dry amount of 20 g /
to form the suede resin layer by coating so that m ^2. Next, an acrylic resin (molecular weight: 55000,
An adhesive consisting of 10 parts by weight of Tg: -30 ° C), 10 parts by weight of a vinyl chloride-vinyl acetate copolymer (molecular weight: 26000, Tg: 75 ° C), and 140 parts by weight of a pigment (manufactured by Showa Ink Industries, Ltd .: HS-SW)
Was applied with a comma coater so that the applied amount was 25 g / m ² when dried, and an adhesive layer was formed to obtain a transfer foil.

Transfer the obtained transfer foil at a transfer temperature of 200 ° C and a transfer pressure of 15kgf / 10m.
When roll-transferred to a PS substrate at m and a speed of 3 m / min, a suede-like molded product having excellent scratch resistance and design properties was obtained. Further, even when the transfer surface was scratched with a cutter and further peeled off with a cellophane tape, no peeling occurred and the adhesion was good.

Comparative Example 1 A matte surface of a 25 μm-thick coating mat PET film (a release mat 1017-6 manufactured by Kimoto Corporation) was coated with 50 parts by weight of an aluminum chelate-modified acrylic resin, 50 parts by weight of an acrylic resin, and 100 parts by weight of bead pigment. Suede Ink (Dainichi Chemical Co., Ltd .: Daiplacoat E3)
206) was applied using a comma coater so that the applied amount was 20 g / m ² when dried to form a suede-like resin layer. Next, an adhesive layer was formed in the same manner as in Example 1 to obtain a transfer foil.

When the obtained transfer foil was transferred in the same manner as in Example 1, a suede-like molded product having excellent design properties was obtained.
This was less abrasion resistant than that of Example 1.

Example 2 Ink (Moroboshi Ink: Velvex) containing 40% of an acrylic resin-coated bead pigment having a particle diameter of 30 μm on the surface of a 25 μm-thick polyethylene terephthalate film (F-65 manufactured by Toray Industries, Inc.). Coating with a comma coater,
A release layer composed of a fine uneven coating layer was formed.

Next, 100 parts by weight of a urethane elastomer (molecular weight: 25000, Tg: −30 ° C.), 10 parts by weight of a vinyl chloride-vinyl acetate copolymer (molecular weight: 26000, Tg: 75 ° C.) on the surface of the release layer,
A suede ink layer consisting of 125 parts by weight of bead pigment (Suede Ink Industry Co., Ltd .: Suede Ink No. 2) is applied with a Koma coater so that the applied amount is 20 g / m ² when dried. Was formed. Next, an adhesive layer was formed on the resin layer in the same manner as in Example 1 to obtain a transfer foil.

When the obtained transfer foil was transferred in the same manner as in Example 1, it was excellent in abrasion resistance and design, and further excellent in matting property as compared with the case of Example 1, and more similar to the feel of suede. A highly designed molded product was obtained.

〔The invention's effect〕

As described above, the matte transfer foil of the present invention is a transfer foil in which a transfer layer having a matte resin layer containing a bead pigment is laminated on the surface of the base material sheet, and the matte resin layer contains a polyester polyol and an isocyanate compound. In order to contain the urethane elastomer obtained by the reaction, compared to the matte transfer foil not containing the urethane elastomer in the conventional matte resin layer, the matte resin layer has better physical properties such as abrasion resistance and scratch resistance. An excellent matte surface can be imparted to the transferred object.

Further, by using a matte resin layer containing a vinyl chloride-vinyl acetate copolymer resin, the adhesion between the matte resin layer and the adhesive layer can be further improved.

The matte transfer foil of the present invention, when a shaping film having fine irregularities for matting is used on the surface of the substrate sheet, the matte effect of the bead pigment and the fine irregularities are combined to form a more matte state. The surface becomes excellent, and a surface excellent in physical properties and matting state can be imparted to the transferred body.

Further, it has a release layer made of a releasable binder resin to which fine particles of spherical or spherical shape are added, and the surface of the release layer has a surface state in which the center of gravity of the fine particles protrudes from the average level surface of the release layer. Yes, and surface gloss value (75 ° incidence) is 0.
When a shaping film having a release layer surface with a surface roughness of 0.8 to 30 μm and a surface roughness of 5 to 2.5 is used, the surface of the transfer foil after transfer has a concave portion expanded inside compared to the opening portion. That is, a suede-like appearance having an inwardly spreading shape and a matte state of a super-matte state appears, and a super-matte suede-like appearance excellent in abrasion resistance and scratch resistance can be obtained.

Further, in the transfer foil of the present invention, the matte resin layer has a vinyl chloride
When a vinyl acetate resin is used, a matte resin layer is formed by laminating an adhesive layer on the surface of the matte resin layer and adding 10 to 15% of a vinyl chloride-vinyl acetate resin copolymer to the adhesive layer. In order to improve the adhesiveness between the transfer material and the adhesive layer, there is an effect that there is no fear that a matte surface (a suede-like surface) applied to the transfer material surface is peeled off from the transfer material.

[Brief description of the drawings]

1 is a longitudinal sectional view showing an example of the matte transfer foil of the present invention, FIG. 2 is a longitudinal sectional view showing another example of the matte transfer foil, FIG. 3 is a longitudinal sectional view of a shaping film, FIG. FIG. 4 is a longitudinal sectional view showing an example of use of the matte transfer foil. DESCRIPTION OF SYMBOLS 1 ... Matt transfer foil, 2 ... Base sheet, 3 ... Bead pigment, 4 ... Matt resin layer, 5 ... Adhesive layer, 6 ... Transfer layer, 7 ... Fine unevenness, 8 ... ... Shaping film, 9 ...
Fine particles, 10 binder resin, 11 fine uneven coating layer,

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Makoto Takemura 450 Aoto-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture Inside Morohoshi Ink Co., Ltd. (56) References JP-A-2-26800 (JP, A) JP-A-2 -121900 (JP, A) JP-A-55-21241 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B44C 1/165-1/17

Claims (6)

(57) [Claims] A transfer foil comprising a transfer sheet having a matte resin layer containing bead pigment on the surface of a substrate sheet, wherein the matte resin layer has a linear polyester polyol having an active hydrogen in a molecule and an isocyanate. A matte transfer foil comprising a urethane elastomer composed of a thermoplastic urethane resin obtained by reacting with a compound. 2. The matte transfer foil according to claim 1, wherein the matte resin layer contains a vinyl chloride-vinyl acetate copolymer resin. 3. An adhesive layer is laminated on the surface of the matting resin layer, and the adhesive layer comprises a vinyl chloride-vinyl acetate resin of 10 to 15 times.
The matte transfer foil according to claim 2, which is contained by weight. 4. The matte transfer foil according to claim 1, wherein the base sheet is a shaping film having fine matte irregularities on the surface. 5. The matte transfer foil according to claim 4, wherein the shaping film has on its surface a fine uneven coating layer made of a releasable binder resin to which fine particles having a spherical or spherical shape are added. 6. The fine uneven coating layer of the shaping film has a surface state in which the center of gravity of the fine particles protrudes from the average level surface of the release layer, and the surface gloss value (75 ° incidence) is 0.5 to 2.5. 6. The matte transfer foil according to claim 5, wherein the surface roughness is 0.8 to 30 [mu] m.