JPH03243399A - Releasable base material sheet for transfer foil and transfer foil using the same - Google Patents

Abstract

PURPOSE:To obtain a releasable base material sheet having a proper value in the release strength between the base material sheet and a transfer layer by forming a release layer containing a three-dimensional crosslinkable curable resin whose release strength with a release layer alone is below a specific value and granular silica having a specific particle size on a base material sheet. CONSTITUTION:A releasable base material sheet for a transfer foil is formed by forming a release layer containing a three-dimensional crosslinked curable resin whose release strength with a release layer alone is below 6g/cm and granular silica having a particle size of 5-50nm on a base material sheet. By adding granular silica having a particle size of 5-50nm, the release strength of the release layer composed of the three-dimensional crosslinked curable resin is enhanced to 6-24g/cm from below 6g/cm being the original release strength of the resin. The releasable base material sheet for the transfer foil has close adhesiveness sufficient to generate no release of the base material sheet and the release layer at the time of transfer and generates no release inferiority of the release layer and the transfer layer due to the application of heat and has a proper value enough to generate release at the time of transfer but no release and detachment at the times of the manufacturing of the transfer foil, keeping and transport as the release strength of the transfer layer and the release layer.

Description

Detailed Description of the Invention [Industrial Field of Application] 3. Detailed Description of the Invention The present invention provides a releasable base sheet for transfer foil, which has an appropriate peel strength between the base sheet and the transfer layer, and the same. This invention relates to a transfer foil using.

[Conventional technology]

For a transfer foil having a structure in which a patterned or all-over solid release layer is formed on a base sheet and a transfer layer is provided on top of this, the base sheet and the release layer must be at least as strong as each other so that they do not separate during transfer. Adhesion, prevention of poor peeling between the release layer and the transfer layer due to heat application during the transfer layer formation process such as printing or the transfer process, and especially by adding a matte agent to the release layer to create a matte transfer layer. In the case of transfer foil with a transfer structure, it is recommended to use a three-dimensional crosslinked curable resin with a relatively high crosslinking density in order to prevent defects in the matting effect due to embedding of the matting agent due to pressure during the transfer process. is most preferred and frequently used.

In addition, in order to make the release layer matte, the particle size should be approximately 500 nm to 110,000 nm in order to diffusely reflect visible light.
Addition of a matting agent such as calcium carbonate (0.5 to 10 IIm) has been practiced.

Examples of these prior art techniques include the inventions described in Japanese Patent Application Laid-open Nos. 18298-1982 and 44491-1982.

[Problems to be Solved by the Invention] In such a transfer foil, the desired peeling strength between the transfer layer and the release layer is such that the peeling layer can be reliably and easily removed during transfer, but the manufacturing process, storage, and transportation of the transfer foil Sometimes an appropriate value is required to prevent peeling and falling. This suitable value is usually in the range of 6 to 24 g/cm.

However, the conventionally known transfer foil described above is designed to improve the adhesion, prevent defective peeling of the transfer layer due to the application of heat during printing and transfer processes, and prevent matting due to embedding of the matting agent due to pressure during the transfer process. When selecting a three-dimensional crosslinked curable resin with a relatively high crosslinking density that satisfies the conditions for preventing poor effects, all of them inevitably have a peel strength of less than 6 g/cm, which means that the peeling is too light, making it difficult to use in the manufacturing process of transfer foils such as printing. Another problem is that the release layer tends to peel off from the mold release layer during storage and transportation.

Surprisingly, almost no increase in peel strength due to anchor hardening is found even when the above-mentioned matting agent is added.

The object of the present invention is to solve the above-mentioned problems, and to provide an appropriate peel strength such that the release layer and the transfer layer are reliably and easily peeled off during transfer, and do not peel off or fall off during the transfer foil manufacturing process, storage, and transportation; Adhesion between the release layer and the base sheet at least to the extent that they do not peel off during transfer, prevention of poor peeling between the release layer and the transfer layer due to heat during the transfer foil manufacturing process, and especially mattness in the release layer. The object of the present invention is to provide a transfer foil and a releasable base sheet for use in the transfer foil, which have three or four advantages at the same time, including prevention of deterioration of the matting effect due to heat and pressure during transfer.

[Means to solve the problem]

The present invention provides: r (1) A three-dimensional cross-linked curable resin with a peel strength of less than 6 g/cm and a particle size of 5 nm on a base material sort.
1. A releasable base sheet for transfer foil, characterized in that a release layer containing granular silica with a size of 50 nm or more is formed.

(2) In a transfer foil having a release layer and a transfer layer having at least peeling MN on a base sheet in this order, the release layer has a peel strength of less than 6 g/cm with respect to the release layer alone. Transfer foil characterized by containing a three-dimensional crosslinked curable resin and granular silica having a particle size of 5 nm or more and 50 nm or less (3) The gloss of the base sheet and the release layer is different, and the release layer is Claim (1) characterized in that it is partially patterned.
The releasable base sheet for transfer foil described above.

(4) Claim (2) characterized in that the base sheet and the release layer have different glosses, and the release layer has a partial pattern.
Transfer foil as described.

(5) The release layer has a peel strength of 6 g/c with respect to the release layer alone.
Three-dimensional cross-linked curable resin of less than m and particle size of 5 nm or more 50
The releasable base sheet for transfer foil according to claims (1) and (3), characterized in that it contains granular silica with a particle size of 500 nm or less and a matting agent with a particle size of 500 nm or more.

(6) The release layer has a peel strength of 6 g/
Claims (2) and (4) characterized in that it contains a three-dimensional cross-linked curable resin with no droplets of cm, granular silica with a particle size of 5 nm or more and 50 nm or less, and a matting agent with a particle size of 500 nm or more.
) Transfer foil described. ”.

The present invention will be explained below based on the drawings.

FIG. 1 is a vertical cross-sectional view of a releasable base sheet in which a release layer is formed in a partial pattern according to an embodiment of the present invention, and FIG. FIG. 3 is a vertical cross-sectional view of a transfer foil in which a release layer is formed in a pattern over the entire surface of the embodiment of the present invention.

As the base material sort 1, materials normally used for transfer paper can be used. Examples of materials include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene terephthalate/isophthalate copolymers; polyolefin resins such as polyethylene, polypropylene, and polymethylpentene;
Polyfluorinated ethylene resins such as polyvinyl fluoride, polyvinylidene fluoride, poly(47-ethylene), ethylene-47-modified tyrene copolymer, nylon 6, nylon 6
．． Polyamides such as 6, polyvinyl chloride, vinyl chloride/vinyl acetate copolymers, ethylene/vinyl acetate copolymers, ethylene/vinyl alcohol copolymers, vinyl polymers such as polyvinyl alcohol vinylon, cellulose triacetate, cellophane, etc. Cellulose resin, acrylic resin such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, polyphtyl acrylate, etc., synthetic resin sheet such as polystyrene, polycarbonate, polyarylate, polyimide, or high quality paper, Paper such as thin paper, glassine paper, parchment paper, single layered material such as metal foil, or two of these
A laminate having more than one layer can be mentioned.

Among these, various performances such as adhesion with the release layer, flexibility and heat resistance required in the transfer process, and peel strength with the release layer if the base sheet and the release layer have a part in direct contact with each other. Select a keyaki material with a weight of 6 to 24 g/cm. The thickness of the base sheet 1 is 12 to 200 μm, preferably 16 to 5 μm.
It is 0 μm.

Further, if necessary, the surface of the base material sheet 1 on which the mold release layer 2 is to be formed may be subjected to a known adhesion treatment such as a corona discharge treatment in order to improve the adhesion with the mold release layer 2. . Alternatively, when the release layer 2 is partially provided and used for injection molding simultaneous transfer, poor peeling, cracking, and whitening may occur at the direct contact area between the base sheet and the release layer due to the spreading part of the base sheet. In order to prevent the occurrence of mold release layer 2, a known mold release layer such as an acrylic resin-based mold release layer may be provided prior to forming the mold release layer 2. However, when the release layer N2 is partially provided, a material is selected that has an adhesive force between the base sheet 1 or the known release layer and the release layer 31 of 6 to 24 g/cm.

The release layer 2 may be provided in a partial pattern as shown in FIGS. 1 and 2, or may be provided in a pattern over the entire surface as shown in FIG.

Particularly, the purpose of providing the release layer 2 in a partial pattern is to give the transfer layer a pattern-like gloss difference made up of a plurality of areas with different glosses (i.e., gloss).

Therefore, in this case, the gloss of the release layer 2 and the base sheet 1 are made to differ to a visible extent. Specifically, when the base sheet 1 has high gloss, a matting agent is added to the release agent layer, and when the base sheet 1 has low gloss (matte), a matting agent is added to the release agent layer. Added to give high gloss. In addition, in order to achieve uniform transferability over the entire surface, the peel strength between the transfer layer 3 and the release layer 2 and between the transfer layer 3 and the base sheet 1 is at least 6 to 24 g at the spacing.
Adjust to the range of / 1 nch using the method described below.

Note that the release layer here refers to a layer that remains on the substrate side even after transfer and makes it easy to peel off from the transfer layer, and the release layer refers to a layer that transfers to the transferred object after transfer and forms a layer on the surface of the transfer layer. A layer that serves as a protective layer. Peeling takes place between the release layer and the release layer.

The material of the release layer 2 includes at least a binder of a three-dimensionally crosslinked curable resin whose peel strength with respect to the release layer alone is 6 g/cm or less, and a granular filler with a particle size of 5 nm or more and 50 nm or less. The composition is cured and formed.

Here, as the three-dimensionally crosslinked curable resin, an ionizing radiation curable resin or a thermosetting resin is used.

As the ionizing radiation-curable resin, a composition in which a prepolymer oligomer and/or monomer having a polymerizable unsaturated bond or an epoxy group in the molecule is appropriately mixed is used.

Examples of the prepolymer oligomer include unsaturated polyesters such as condensates of unsaturated dicarboxylic acids and polyhydric alcohols, methacrylates such as polyester methacrylates, polyether methacrylates, polyol methacrylates, and melamine methacrylates, polyester acrylates, epoxy acrylates, Examples include acrylates such as urethane acrylate, polyether acrylate, polyol acrylate, and melamine acrylate.

Examples of the monomers include styrene, styrene monomers such as α-methylstyrene, methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate,
Acrylic acid esters such as butoxyethyl acrylate, butyl acrylate, methoxybutyl acrylate, phenyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, methoxyethyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate, Methacrylic acid esters such as lauryl methacrylate, 2-(N,N-diethylamino)ethyl acrylate, 2-(N,N-dimethylamino)ethyl acrylate, 2-(N,N-diethylamino)ethyl acrylate, Substituted amino alcohol esters of unsaturated acids such as benzylamino)ethyl, (N, N-dimethylamino)methyl methacrylate, and 2-(N,N-diethylamino)propyl acrylate; unsaturated carboxyls such as acrylamide and methacrylamide; Compounds such as acid amides, ethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, 1゜6-hexanediol diacrylate, diethylene glycol diacrylate, triethylene glycol cyacrylate, dipropylene glycol diacrylate, ethylene glycol acrylate , polyfunctional compounds such as propylene glycol dimethacrylate, diethylene glycol dimethacrylate, and/or polythiol compounds having two or more thiol groups in the molecule, such as trimethylolpropane trithioglycolate, trimethylolpropane trithiopropylene ester, pentaerythritol tetrathioglycol, etc.

The above compounds may be used singly or in combination of two or more as required, but in order to impart normal coating suitability to the resin & 11 bottom material, 5% by weight or more of the above prepolymer or oligomer may be added to the above compound. It is preferable that the monomer and/or polythiol content is 95% by weight or less.

When selecting a monomer, if flexibility of the cured product is required, the amount of monomer should be reduced to the extent that it does not interfere with coating suitability or the required performance as the transfer foil, or Alternatively, a bifunctional acrylate monomer is used to create a structure with relatively low crosslink density. In addition, if heat resistance, hardness, solvent resistance, etc. of the cured product are required, the amount of monomer may be increased within a range that does not cause any problems in coating permeability, or acrylate monomers with trifunctional or higher functionality may be used. Preferably, a structure with a high crosslink density is obtained by using a carbon fiber. 1.
It is also possible to adjust the coating suitability and the physical properties of the cured product by mixing a bifunctional monomer and a trifunctional or higher functional monomer.

The monofunctional acrylate monomers mentioned above include 2-
Hydroxyacrylate, 2-hexyl acrylate,
Examples include phenoxyethyl acrylate.

Examples of bifunctional acrylate monomers include ethylene glycol diacrylate and 1,6-hexanediol diacrylate, and examples of trifunctional or higher functional acrylate monomers include trimethylolpropane triacrylate and pentaerythritol hexaacrylate. , dipentaerythritol hexaacrylate, and the like.

In particular, when curing with ultraviolet rays, the ionizing radiation-curable resin composition may be added as a photopolymerization initiator such as acetophenones, hensifenones, Michler's henzoylhenzoate, α-arxime ester, tetramethyl meuram monomer, etc. A mixture of sulfide, thioxanthone, and/or photosensitizer such as n-butylamine, triethylamine, and tri-n-butylphosphine can also be used.

In this case, ionizing radiation refers to electromagnetic waves or charged particle beams that have energy quantum capable of polymerizing and crosslinking molecules, and ultraviolet rays and electron beams are usually used.

As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc, a black light lamp, a metal halide lamp, etc. is used.

As the electron beam source, various electron beam accelerators such as Cockroft-Walton type, Humpgraph type, resonant transformer type, insulated core transformer type, linear type, dynagotron type, and high frequency type are used. 100-1000keV preferably 100-30
Irradiate electrons with an energy of 0 ke V.

Thermosetting resins include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkynd resin, melacan/urea cocondensation resin There are silicon resins such as siloxane resins, etc., and if necessary, curing agents such as crosslinking agents and polymerization initiators,
Add polymerization accelerators, solvents, viscosity modifiers, etc.

As curing agents, isocyanates are usually used for unsaturated polyester resins and polyurethane resins, amines are used for epoxy resins, peroxides such as methyl ethyl ketone peroxide, and radical initiators such as azobisisobutyronitrile are used for unsaturated polyester resins. Commonly used in resins.

As the isocyanate, aliphatic or aromatic isocyanates having a valence of two or more can be used, but aliphatic isocyanates are preferable from the viewpoint of prevention of heat discoloration and weather resistance. Specific examples include tolylene diisocyanate, xylene diisocyanate, 44-diphenylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, and the like.

Among these, the most preferable resins for achieving the object of the present invention are acrylic acid, methacrylic acid, acrylic acid derivatives, methacrylic acid derivatives,
When a homopolymer or copolymer of , or a mixture of these and chlorinated rubber is used, it is an aminoalkynd resin having a methylolated acrylamide group. Specifically, it is mainly composed of polyester resin, preferably alkyd resin such as glyptal resin of reticulated polyester,
It is made by mixing modified melamine such as alkoxymethyl melamine as necessary. Among them, a mixture of an alkyd resin having a methylolated acrylamide group and a low-molecular compound having at least two methylol groups, alkoxymethyl groups, water a groups, or carboxyl groups,
After curing, the adhesion with the base sheet and the releasability with the release layer are improved.

Other preferred resins include thermosetting acrylic resins containing at least a carboxyl group, an epoxy group, an amide group, a methylolated acrylamide group, a methoxymethylacrylamide group, a butoxymethylacrylamide group, or an aliphatic double group. One of the functional groups with a bond
There are self-crosslinking products that have more than one species. In particular, from the viewpoint of easy curing, methyl methacrylate styrene-hydroxyacrylate copolymer, which has an average of four methoxymethyl acrylamide groups and butoxymethyl acrylamide groups in one molecule, is most suitable.These resin materials can be used alone. Alternatively, it may be used in combination with a polymer having the above-mentioned functional groups. In the case of a mixture, it is possible to use an acrylic resin having a hydroxyl group in addition to the above polymer having a functional group. Furthermore, if necessary, diepoxide, melamine resin, urea resin, or modified products thereof may be mixed with the resin material, or a low molecular compound having two or more of the above functional groups may be mixed and used.

The release layer made of the amino alkyd resin or thermosetting acrylic resin can be crosslinked and cured at a temperature of 50 to 150°C. Further, by using an acid catalyst, the curing reaction can be accelerated and crosslinking curing can be carried out at a relatively low temperature of about 30 to 120°C. As these acid catalysts, strong acids such as para-toluenesulfonic acid and hydrochloric acid are preferable.

As a matte material, the particle size is approximately 500nm to 10010000n, 5 to 10μ because it diffusely reflects visible light.
m), more preferably 1000 to 7000 nm (1 to 7
µm) is used. Silica is preferred as the material, but 1 to 25% by weight, more preferably 5 to 20% by weight of inorganic compounds such as calcium carbonate, barium sulfate, and aluminum hydroxide, and organic compounds such as polyethylene are added.

As the particulate filler with a particle size of 5 nm or more and 50 nm or less to be added to the release layer 2, silica is most preferable in order to achieve the objectives of the present invention, but other known substances such as calcium carbonate, barium sulfate, and aluminum hydroxide can be used. .

The purpose of adding the granular filler in the present invention is to increase only the peel strength between the base sheet and the release layer without changing the gloss of the surface of the release layer, and to make it within the range of 6 to 24 g/cm. but,
What contributes to the peel strength with the release layer is the particle size of the granular filler added, and this is preferably 5 to 50 nm, more preferably 10 nm.
By adding an appropriate amount of ~30 nm, the peel strength of the release layer made of three-dimensionally cross-linked curable resin can be reduced to the original 6 g of the resin.
It becomes possible to adjust from less than /cm to 6 to 24 g/cm.

The amount of the granular filler added is adjusted as appropriate depending on the combination of the binder of the three-dimensionally crosslinked curable resin and the binder of the release layer used, and the particle size of the granular filler. When using silica with the above particle size as a resin or granular filler, it is 0.2 to 10% by weight, more preferably 0.5 to 5% by weight based on the resin.
is optimal. Generally, as the amount added increases, the peel strength increases.

By forming a release layer 2 on a base sheet 1, a releasable base sheet of the present invention as shown in FIG. 1 is obtained. Further, by forming a transfer layer 3 on the release layer 2, the transfer foil of the present invention is obtained.

Here, the transfer layer 3 is applied from the side closer to the release layer 2 as shown in Fig. 2.
It consists of a release layer 32, a decorative layer 32, and an adhesive layer 33. Among these, the peeling layer 32 is essential in order to obtain uniform and stable peelability over the entire surface and to obtain surface strength of the transfer layer after transfer. Other layers are provided as necessary.

The release layer 32 has a binder selected from various known resins as a main component. In selection, the peel strength with the release layer is 6 to 24 g/cm, and physical properties such as abrasion resistance of the surface of the transfer layer after transfer, design appearance, etc. are taken into consideration.

The thermoplastic resins used include cellulose derivatives such as ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxycellulose, and cellulose acetate propionate, styrene resins or styrene copolymers such as polystyrene and polyα-methylstyrene, Acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, and polybutyl acrylate, polyvinyl chloride, polyvinyl acetate, vinyl chloride/vinyl acetate copolymers, vinyl polymers such as polyvinyl butyral, rosin, Homopolymers or copolymers such as rosin-modified maleic acid resins, rosin-modified phenol resins, rosin ester resins such as polymerized rosin, coumaron resins, vinyltoluene resins, and polyamide resins are mentioned.

Examples of the geothermal curable resin and ionizing radiation curable resin include those listed above for the binder resin of the release layer.

The film thickness is also selected depending on the desired physical properties, etc., but is usually 0.1~
It is 10 μm.

As the decorative layer 32, a picture pattern layer, a metal thin film layer, etc. are used.

The picture pattern is appropriately selected from those that imitate natural movement such as wood grain, stone grain, cloth grain, etc., figures, symbols, letters, ruled lines, solid solid lines, etc., and the ink is appropriately selected from well-known materials and printed using printing methods, etc. Form.

Examples of printing methods include intaglio printing such as gravure and gravure offset, letterpress printing such as letterpress and flexo, lithographic printing such as lithographic offset, stencil printing such as silk screen, dilitho printing, electrostatic printing, and inkjet printing. It will be done.

The metal thin film layer is a thin film of metal such as argonium, chromium, galvanium, copper, silver, gold, etc., provided by a known method such as vacuum deposition, sputtering, or electroless plating. Further, if necessary, the metal thin film layer may be formed on the partial pattern by a known method.

The adhesive layer 33 is a layer for transferring and adhering the transfer layer to the object to be transferred, and is selected from heat-sensitive adhesives, solvent-activated adhesives, ionizing radiation-curable adhesives, etc. depending on the application. In addition,
When the transfer layer other than the adhesive layer itself, such as the pattern layer or the release layer, has sufficient adhesiveness, the adhesive layer may be omitted.

Heat-sensitive adhesives exhibit adhesive properties when heated, and thermoplastic resins, ionomers, etc. are usually used. Examples of resins include ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose,
Cellulose derivatives such as cellulose acetate propionate, styrene resins or styrene copolymers such as polystyrene, polyα-methylstyrene, polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate,
Acrylic resins such as polybutyl acrylate, polyvinyl chloride, polyvinyl acetate, vinyl chloride/vinyl acetate copolymer ethylene/vinyl alcohol copolymer, vinyl polymers such as polyvinyl butyral, rosin, rosin-modified maleic acid resin, rosin Modified phenolic resin, rosin ester resin such as polymerized rosin, rubber resin such as polyisoprene rubber, polyisobutyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber, coumaron resin, vinyl toluene resin, polyamide resin, polychlorinated olefin, etc. Examples include natural or synthetic resins, various ionomers, and the like.

Methods for forming the release layer 2, release layer 31, and adhesive layer 33 include coating methods such as gravure coating, gravure reverse coating, gravure offset coating, spinner coating, roll coating, reverse roll coating, knife coat kiss coating. , wheeler coat, day coat, solid coat by silk screen, wire barcode, flow coat, comma coat, flowing coat,
Use brush coating, spray coating, etc. In particular, when forming the release layer 2 in a partial pattern, the above-mentioned known printing method is used.

The transfer foil obtained in the present invention is obtained by placing the transfer target 4 and the transfer layer facing each other as shown in Fig. 2, and transferring the film using various known transfer methods such as hot stamping, thermal transfer such as injection molding simultaneous transfer, and solvent activated transfer. You can print.

[Function] In the present invention, the reason why the peel strength between the release layer and the mold release layer can be adjusted is that by adding granular silica with a particle size of 5 nm or more and 5 Onm or less, the mold release made of a three-dimensional crosslinked curable resin The reason why the peel strength of the layer can be increased from the original less than 6 g/cm of the resin to 6 to 24 g/cm is unknown, but it is speculated that even if a matting agent with a particle size of 500 to 110,000 nm is added, the matting The surface of the agent particles is coated with a three-dimensional cross-linked curable resin with low peel strength, so chemical adhesion cannot be expected, and both surface area and curvature are relatively small, so almost no physical anchoring effect can be expected. Therefore, contrary to expectations, even if a matting agent is added, the expected increase in peel strength cannot be obtained.

On the other hand, when granular silica having a particle size of 5 nm or more and 50 nm or less is added, a large number of small protrusions with low curvature are formed on the surface of the three-dimensionally crosslinked curable resin, and both the surface area and the surface curvature increase. Therefore, the anchoring effect is significant. Therefore, it becomes possible to increase the peel strength surprisingly effectively.

〔effect〕

The present invention has the following effects. That is, when the releasable base sheet for transfer foil according to claim (1) is used as a transfer foil on which a transfer layer such as a release layer is formed, (1) at least during transfer between the base sheet and the release layer; Adhesiveness to the extent that it does not peel off, ■ Prevention of defective peeling between the release layer and the transfer layer due to the application of heat during the transfer layer formation process such as printing or the transfer process, ■
The peel strength between the transfer layer and the release layer should be set to an appropriate value that allows for reliable and easy peeling during transfer, but does not peel off or fall off during the transfer foil manufacturing process, storage, or transportation, i.e., 6 to 24 g.
/cm. It has the unique effect of bringing together three performances that were previously not possible at the same time.

The transfer foil according to claim (2) has: (1) adhesion between the base sheet and the release layer at least to the extent that they do not peel off during transfer; (2) the release layer can be formed by applying heat during the transfer layer forming process such as printing or the transfer process; Prevention of poor peeling between the transfer layer and the transfer layer; ■ Peel strength between the transfer layer and the release layer to ensure reliable and easy peeling during transfer;
It has an appropriate value, that is, 6 to 24 g/cm, so that it does not peel off during the manufacturing process, storage, and transportation of the transfer foil. It has the unique effect of bringing together three performances that were conventionally unreliable at the same time.

The releasable base sheet for transfer foil according to claim (3), in addition to the effect of the invention according to claim (1), has a transfer layer on the surface of the transfer foil when a transfer layer is formed thereon. It has the effect of being able to form a partial pattern-like difference in gloss.

In addition to the effect of the invention described in claim (2), the transfer foil according to claim (4) has the ability to reduce the difference in gloss of a partial pattern formed on the surface of the transfer layer in addition to the transfer layer on the transfer target. This has the effect of being able to be transferred simultaneously.

The releasable base sheet for transfer foil according to claim (5) and the transfer foil according to claim (6) are the same as those described in claims (1) to (4).
In addition to the effects of the invention described above, when transferring matte gloss to the surface of the transfer layer, the peel strength between the base sheet and the release layer can be adjusted to an optimum value of 6 to 24 g/cm, and the gloss When transferring the erasing transfer layer, the matting agent is prevented from being buried by the transfer pressure and the matting effect is prevented from being reduced.

[Example] A polyethylene terephthalate sheet (manufactured by Toshi ■, Lumirror As amino alkyd resin/butylated melamine/
Silica for matting (particle size 2000 nm) / Silica for adjusting peel strength (particle size 15 nm) = 87.5/12.5/6
．． 25/6. Using a mixture of 100% by weight ink (manufactured by Showa Ink Kogyo ■) with a composition of 25 (weight ratio) and 5% by weight methanol solution of hydrochloric acid, a partial pattern with a film thickness of 5 μm was gravure-printed. print, then 100
The matte release layer was cross-linked and cured by heat treatment for 5 seconds in a 'C atmosphere to partially shape the release layer into a pattern, thereby obtaining a release base sheet for transfer foil of the present invention.

[Kojim] An ink (mixture of acrylic resin and chlorinated rubber) was applied as a release layer to the release layer surface of the release base sheet produced in Example 1.
Showa Ink Kogyo (manufactured by Showa Ink Kogyo) was coated on the entire surface, and then a pattern was gravure printed as a decorative layer using an ink containing a mixture of vinyl chloride/vinyl acetate copolymer and acrylic resin (manufactured by Showa Ink Kogyo). Then, an acrylic resin ink (manufactured by Showa Ink Kogyosho ■, H3ES) was used as a heat-sensitive adhesive layer.
3) was coated to obtain a transfer foil of the present invention.

The resulting transfer foil has a peel strength of 2 between the release layer and the base sheet.
08/Cm, there is no problem such as the peeling layer naturally lifting or falling off from the printing process to the transfer process, and this transfer foil is heated to a surface temperature of 2.0cm using a hot stamping machine.
Thermal transfer was carried out onto a polystyrene plate to be transferred using a 00''C rubber roll. When the base sheet was peeled off in the transfer process, the entire surface of the transfer layer could be stably peeled off without any residue on the base sheet.

The obtained transfer product had a 11M appearance with a printed pattern, a patterned ribbed area, and a matte area on the surface of the transferred object.

- Prepare a polyethylene terephthalate sheet (DHH Inline Corona PET manufactured by Diafoil ■) with a thickness of 50/1 m as a base sheet, then use aminoalkyd resin/butylated melamine/matte open silica as a release layer. (particle size 4000nm)/Silica for peel strength adjustment (particle size 10nm)
m) = 88°5/11.5/9.215.8 (weight ratio) &gkai ink (manufactured by Showa Ink Kogyosho ■) 10
20% by weight of para-toluenesulfonic acid relative to 0% by weight
Using a methanol solution mixed at a ratio of 10% by weight, the entire surface was coated with a gravure coater to a thickness of 5 μm, and then
A matte release layer was formed on the entire surface by heat treatment for 5 seconds in an atmosphere of 0°C to cure crosslinking. Next, a decoration layer and a heat-sensitive adhesive layer were formed in the same manner as in Example 2 to obtain a transfer foil of the present invention.

This transfer foil was thermally transferred onto a polystyrene plate to be transferred using the same real stamp transfer layer as in Example 2, and as in Example 2, good transfer suitability was obtained.

The obtained transfer product had a beautiful appearance with a printed pattern on the surface of the transfer object and a matte surface all over.

1. Prepare a sheet (manufactured by Diafoil ■, GHa8) of polyethylene terephthalate with a thickness of 38 μm coated with an acrylic resin molding release layer as a grave soil base material sheet, and then release the mold onto the molding release layer. Amino alkyd resin as layer/
Butylated melamine/matte opening silica (particle size 4000n)
m)/silica for peel strength adjustment (particle size 10 nm) = 8
8.5/11.5/9.215.8 (weight ratio) 100 weight ratio of ink (manufactured by Showa Ink Kogyo ■) and 10 weight ratio of 20 weight% methanol solution of para-toluenesulfonic acid mixed. Using the obtained product, a partial pattern was printed by gravure printing, and then heat treatment was performed in an atmosphere at 9° C. for 5 seconds to crosslink and cure, thereby forming a matte release layer in a partial pattern. Next, a decoration layer and a heat-sensitive adhesive layer were formed in the same manner as in Example 2 to obtain a transfer foil of the present invention.

This transfer foil was preformed so as to follow the inner surface shape of a female mold for injection molding, and so that the transfer layer faced the cavity side. Next, the # male mold was closed and clamped, and injection molding was performed by pouring molten acrylonitrile styrene resin through the pouring hole on the male mold side, and the transfer layer was thermally transferred to the surface of the acrylonitrile styrene resin shaped body.

As in Example 2, good transfer suitability was obtained.

The resulting transfer product had a beautiful appearance with a printed pattern and a partially patterned matte surface on the surface of the transfer object.

Kazumi"L 銖j- The pattern printing layer was formed in the same manner as in Example 2, and then an anchor coating agent for vapor deposition, Vapor Deposition AC3-8 (manufactured by Showa Ink Kogyosho ■) was applied thereon, Next, a water-soluble resin (manufactured by Showa Ink Kogyo Co., Ltd., water-washing Brimer No. 4) was printed in a partial pattern as a vapor deposition removal layer. Next, aluminum was vapor-deposited on the entire surface, and then washed with water to remove only the aluminum layer on the water-soluble resin part. Then, a heat-sensitive adhesive layer was formed on the entire surface in the same manner as in Example 2, and the present invention was applied. A transfer foil was obtained.

When the same transfer as in Example 2 was performed using this transfer foil, good transfer suitability similar to that in Example 2 was obtained.

1 piece 1i Prepare a 26 μm thick corona discharge treated matte surface polyethylene terephthalate sheet (Lumirror Fruit alkynd resin/butylated mela, miso/silica for peel strength adjustment (particle size 15 nm) =
66.7/33.3/10.0 (weight ratio) 100 weight ratio of ink (manufactured by Showa Ink Kogyo ■) mixed with 10 weight ratio of 20 weight% methanol solution of para-toluenesulfonic acid A partial pattern with a film thickness of 4 μm was gravure printed using
The releasable base material sheet for transfer foil of the present invention is heat-treated for a second to crosslink and cure to form a release layer with ribs in a partial pattern, and the matte portion is formed in a negative pattern of the partial pattern. Obtained.

Thereafter, each transfer layer was formed in the same manner as in Example 2, and the resulting transfer foil had a good peel strength of 15 g/cm between the release layer and the base sheet and the release layer. Example 2
It had good transfer suitability as well.

Furthermore, the obtained transfer product had a printed pattern, a partially patterned ribbed area, and a matte area on the surface.

In Example 2, the release layer was made of amino alkyd resin/butylated melamine/matting silica (particle size 2000 nm)/
A transfer foil was made in the same manner as in Example 2, except that an ink (manufactured by Showa Ink Kogyosho ■) having a composition of = 87.5/12.5/6.25 (weight ratio) was used instead.

The resulting transfer foil had a low peel strength of 4 g/cm between the base sheet and the release layer, and there were problems such as the release layer lifting up or falling off naturally between the printing process and the transfer process. It was born.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a longitudinal sectional view of a releasable base sheet in which a release layer is formed in a partial pattern according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a releasable base sheet according to an embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of a transfer foil in which the release layer is formed in a partial pattern, and FIG. It is.

Claims (6)

[Claims] (1) Peel strength 6 with a single release layer on the base sheet
1. A releasable base sheet for transfer foil, comprising a release layer containing a three-dimensional crosslinked curable resin with a particle size of less than g/cm and granular silica with a particle size of 5 nm or more and 50 nm or less. (2) In a transfer foil having a transfer layer having a release layer and at least a release layer on a base sheet in this order, the release layer has a peel strength of less than 6 g/cm with respect to the release layer alone. A transfer foil characterized by containing a three-dimensional crosslinked curable resin and granular silica having a particle size of 5 nm or more and 50 nm or less. (3) Claim (1) characterized in that the base sheet and the release layer have different glosses, and the release layer has a partial pattern.
The releasable base sheet for transfer foil described above. (4) Claim (2) characterized in that the base sheet and the release layer have different glosses, and the release layer has a partial pattern.
Transfer foil as described. (5) The release layer has a peel strength of 6 g/c with respect to the release layer alone.
Three-dimensional cross-linked curable resin of less than m and particle size of 5 nm or more 50
The releasable base sheet for transfer foil according to claims (1) and (3), characterized in that it contains granular silica with a particle size of 500 nm or less and a matting agent with a particle size of 500 nm or more. (6) The release layer has a peel strength of 6 g/c with respect to the release layer alone.
Three-dimensional cross-linked curable resin of less than m and particle size of 5 nm or more 50
The transfer foil according to claims (2) and (4), characterized in that it contains granular silica with a particle size of 500 nm or less and a matting agent with a particle size of 500 nm or more.