JP2002046393A - Polyester film for transferring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polyester film for transferring having excellent transferability to a material to be transferred and small static electricity. SOLUTION: The polyester film for transferring comprises a back surface treating layer having a conductive polymer (A) and a silicone graft polymer (B) and provided on one side surface of a polyester film so that a surface specific resistance value (Rs) of a back surface transfer layer side of the film is 1×1012 Ω/(square) or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The film of the present invention relates to a polyester film for transfer, particularly for simultaneous molding and transfer, but can be applied to other polyester films for release.

[0002]

2. Description of the Related Art A transfer material is constituted by sequentially laminating a release layer, a design layer, an adhesive layer and the like on one side of a base polyester film. By imparting antistatic properties, antibacterial properties, and other various functions to these layers such as the release layer, the pattern layer, and the adhesive layer, a design effect and various functions can also be provided.

In recent years, as the design and various functions of a transferred product have been improved, the function of a transfer device has been improved, and applications in various fields other than decoration are being carried out. In addition, the processing process of the transfer material has become complicated, and the required quality of the base polyester film to be processed as the transfer material has been diversified.An anti-blocking treatment layer is formed on the back surface of the polyester film to improve the processability of the transfer material. And the transfer function has been improved.

However, when a conventional addition-reaction type silicone resin or a fluororesin is used as the resin for the backside treatment layer of the base polyester film, a part of the backside treatment layer of the base polyester film is partially in contact with the backside transfer layer. Has migrated to the opposite surface, and has a problem that it is contaminated by silicone resin or fluorine resin.

When a transfer layer is laminated on a surface opposite to the back treatment layer side by using a roll of a base polyester film provided with a back treatment layer made of the above-mentioned addition-reaction type silicone resin or fluororesin, the separation is first performed. A mold layer is laminated. The release layer is generally composed of a paraffin-based release agent, a silicone resin-based release agent, a cellulose derivative-based, a melamine resin-based release agent, a polyolefin resin-based release agent, a fluororesin-based release agent, and a urea resin-based release agent. A mold agent, a mixed mold release agent, and the like are dissolved in an appropriate solvent to form a coating solution, which is applied to the surface of the base polyester film opposite to the back treatment layer.

However, the surface of the base polyester film opposite to the back surface treatment layer is contaminated by transfer of the silicone resin and fluorine resin when the film is wound into a roll. When the liquid is applied to a contaminated surface, repelling occurs in the coating liquid, resulting in an uneven coating film. A printing layer and an adhesive layer are further laminated on the release layer formed unevenly in this way to provide a transfer layer, and the transfer layer is not uniform even when the transfer is performed on the material to be transferred using the transfer device. Therefore, there is a problem that the transfer is not uniform and a desired transfer cannot be performed.

Further, in the step of producing a transfer material by forming a release layer, a pattern layer, an adhesive layer and the like on the base polyester film, and in the step of transferring to the material to be transferred with the transfer material, the process is caused by the base polyester film. Various troubles have occurred due to static electricity. As examples of troubles in the production of the transfer material, various static electricity troubles such as ignition of a solvent due to generation of static electricity, generation of a mustache on a printed pattern, adhesion of dust, and the like have occurred. In the transfer process, dust in the atmosphere adheres to the transfer material due to static electricity, and troubles such as a failure to transfer a desired pattern due to a failure to transfer a portion to which the dust adheres occur.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a transfer polyester film which is excellent in transferability to a material to be transferred and generates little static electricity. Is to provide.

[0009]

Means for Solving the Problems The present invention has been made in view of the above situation, and the polyester film for transfer which can solve the above problems is as follows.

(1) A back surface treatment layer comprising a conductive polymer (A) and a silicone-based graft polymer (B) is provided on one surface of a polyester film, and the surface resistivity of the polyester film on the back transfer layer side ( Rs)
Is 1 × 10 ¹² Ω / □ or less.

(2) The transfer polyester film according to (1), wherein the conductive polymer (A) is a π-electron conjugated polymer.

(3) The transfer according to (1) or (2), wherein the trunk portion of the silicone-based graft polymer is an acrylic polymer and the branch portion is a comb-shaped graft polymer composed of silicone. For polyester film.

(4) The conductive polymer (A) and the silicone-based graft polymer (B) are contained in the back treatment layer in a weight ratio of 80/20 to 5/95. The transfer polyester film according to any one of 1), (2) and (3).

(5) When the polyester film having the back treatment layer is wound into a roll, the back treatment layer does not transfer to the opposite surface of the film. (3) The polyester film for transfer according to any one of (4) and (4). (6) a release layer on the surface of the polyester film opposite to the surface on which the back treatment layer is provided;
A transfer layer formed by sequentially forming a printing layer and an adhesive layer is laminated, and the transfer layer and the surface of the back surface treatment layer are overlapped with each other, and a load of 0.29 is applied.
When treated at 60 ° C. for 24 hours under a load of MPa,
The transfer polyester film according to any one of the above (1), (2), (3), (4) and (5), wherein the transfer layer does not transfer to the back treatment layer side.

(7) The back surface treatment layer has a solid coating amount of 0.5.
The transfer polyester film according to any one of the above (1), (2), (3), (4), (5) and (6), wherein the amount is from 01 to 2.0 g / m ² .

(8) The above (1), (2), (3), (4), (5), (6), wherein the polyester film is polyethylene terephthalate.
The polyester film for transfer according to any one of (7).

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The polyester resin constituting the base film of the present invention includes aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid or esters thereof and ethylene glycol, diethylene glycol, 1,4-butanediol, It is a polyester resin produced by subjecting a glycol such as pentyl glycol or 1,4-cyclohexanedimethanol to an esterification reaction or a transesterification reaction, followed by a polycondensation reaction.

The polyester resin comprising the acid component and the glycol component can be produced by any conventional method. For example, a transesterification reaction is performed between a lower alkyl ester of an aromatic dicarboxylic acid and glycol, or a direct esterification of an aromatic dicarboxylic acid and glycol to substantially form a bisglycol ester of an aromatic dicarboxylic acid. Or its lower polymer, which is then reduced under reduced pressure to 240
A method of performing polycondensation at a temperature of not more than ℃ is employed. At this time, ordinary catalysts, stabilizers, various additives and the like can be optionally used.

Representative examples of such polyesters include polyethylene terephthalate, polyethylene naphthalate and poly (1,4-cyclohexylene dimethylene terephthalate). Of these, polyethylene terephthalate is preferred. These polyesters may be homopolymers or those obtained by copolymerizing a small amount of the third component, or may be those obtained by mixing these polyesters.

The polyester film referred to in the present invention is:
A film stretched after melt extrusion using a known method and having a thickness of 10 to 250 μm is preferably used. Further, the polyester film may contain various stabilizers, ultraviolet inhibitors, antistatic agents, lubricants, pigments, antioxidants, plasticizers, and the like.

The polyester film for transfer of the present invention comprises:
A back surface treatment layer comprising a conductive polymer (A) and a silicone-based graft polymer (B) is provided on one surface thereof, and the surface resistivity of the polyester film on the back surface transfer layer side is 1
Since it is less than × 10 ¹² Ω / □, the static electricity generated from the transfer material is small.

The polyester film for transfer of the present invention comprises:
The surface specific resistance value on the back transfer layer side needs to be 1 × 10 ¹² Ω / □ or less, and preferably 5 × 10 ¹⁰ Ω / □ or less.

In the backside treatment layer of the transfer polyester film of the present invention, a conductive polymer (A) is used as an essential component for the purpose of lowering the specific surface resistance. As the conductive polymer (A), a π-electron conjugated polymer is preferable, and examples thereof include polyaniline and / or a derivative thereof, polypyrrole and / or a derivative thereof, polyacetylene and / or a derivative thereof, and polythiophene and / or a derivative thereof. Among them, polyaniline and / or a derivative thereof are preferable, and sulfonated polyaniline is particularly preferable.

As the sulfonated polyaniline, a sulfonated aniline copolymer containing an alkoxy group-substituted aminobenzenesulfonic acid as a main component is suitable for the present invention.
Particularly, aminoanisolesulfonic acid is preferable.

Specific examples of the aminoanisolesulfonic acid include 2-aminoanisole-3-sulfonic acid, 2-aminoanisole-4-sulfonic acid, 2-aminoanisole-5-sulfonic acid, and 2-aminoanisole-6-sulfonic acid. Sulfonic acid, 3-aminoanisole-2-sulfonic acid, 3-
Aminoanisole-4-sulfonic acid, 3-aminoanisole-5-sulfonic acid, 3-aminoanisole-6-sulfonic acid, 4-aminoanisole-2-sulfonic acid, 4
-Aminoanisole-3-sulfonic acid and the like.

Among them, 2-aminoanisole-3-sulfonic acid, 2-aminoanisole-4-sulfonic acid, 2
-Aminoanisole-5-sulfonic acid, 2-aminoanisole-6-sulfonic acid, 3-aminoanisole-2-
Sulfonic acid, 3-aminoanisole-4-sulfonic acid,
3-aminoanisole-6-sulfonic acid is preferred.

It is also possible to use a compound in which the methoxy group of anisole is substituted by an alkoxy group such as an ethoxy group and an iso-propoxy group.

In the back surface treatment layer of the transfer polyester film of the present invention, a silicone-based graft polymer (B) is used as an essential component for the purpose of imparting anti-blocking properties. As the silicone-based graft polymer (B), a water-based silicone-based graft polymer is preferable. Further, it is preferable that the composition ratio of the conductive polymer (A) and the silicone-based graft polymer (B) constituting the back treatment layer is A / B = 80/20 to 5/95 (weight ratio).

When the composition ratio of the conductive polymer (A) and the silicone-based graft polymer (B) constituting the back treatment layer is A / B = 81/19 to 100/0 (weight ratio), the transfer polyester Although the surface specific resistance (Rs) of the film on the back treatment layer side can be 1 × 10 ¹² Ω / □ or less, the antiblocking property tends to be insufficient, and a part or all of the transfer layer is formed on the back treatment layer. This is not preferred because it tends to transfer to

On the other hand, when the composition ratio of the conductive polymer (A) and the silicone-based graft polymer (B) constituting the back treatment layer is 4/96 to 0/100 (weight ratio),
The surface specific resistance value (Rs) on the back treatment layer side of the transfer polyester film tends to exceed 1 × 10 ¹² Ω / □, and the antistatic property tends to be insufficient.

The solid coating amount of the back treatment layer is 0.01 g / m
If it is less than ² , a uniform layer cannot be formed on the back treatment layer, and the layer becomes an uneven layer, and the surface resistivity of the back treatment layer is 1 ×.
It tends to exceed 10 ¹² Ω / □, and the antistatic property tends to be insufficient. Further, the anti-blocking property tends to be insufficient, and a part or the whole of the transfer layer is easily transferred to the back surface treatment layer, which is not preferable. When the solid coating amount of the back surface treatment layer exceeds 2.0 g / m ² , the drying time of the coating solution needs to be extended, which is not economical.

The silicone-based graft polymer (B) used in the back surface treatment layer of the transfer polyester film of the present invention is a graft polymer obtained by copolymerizing a polymer monomer having a polymerizable functional group. It is. The silicone-based graft polymer is synthesized by copolymerization of a silicone macromonomer and an acrylic monomer (for example, a methyl methacrylate monomer),
A comb polymer in which the trunk portion is composed of an acrylic monomer and the branch portion is composed of silicone is preferred. Further, an aqueous silicone acrylic polymer copolymerized with a highly hydrophilic monomer such as methacrylic acid or hydroxyethyl methacrylate is also suitable. Among them, the molecular weight of the graft polymer is about 20,000 and the molecular weight of the branch is about 1,000 to 1
000 is preferred. From the viewpoint of the effect of the back surface treatment, a graft polymer having a molecular weight of the branch of 5,000 or more is particularly preferable.

Since the graft polymer has excellent adhesion to the base polyester film, it does not migrate to the opposite surface of the base polyester. Furthermore, since the silicone polymer of the branch exists on the surface of the back treatment layer,
It does not adhere to the outermost adhesive layer of the transfer layer, and the effect of the back surface treatment is obtained.

When a polyester film on which a back treatment layer is formed using a conventional addition type silicone polymer is wound into a roll, free oil in the silicone polymer and unreacted monomers at the time of formation are mixed with the back treatment layer. Easily migrates to the opposite film surface. When the roll film provided with the back treatment layer is unwound and the transfer layer is laminated on the surface opposite to the back treatment layer, a release layer is first laminated. However, since the surface opposite to the back treatment layer of the base polyester film is already contaminated by the migration from the back treatment layer, when the coating liquid for the release layer is applied to the contaminated surface, In addition, coating irregularities such as repelling may occur, resulting in a non-uniform coating film. A printing layer and an adhesive layer are further laminated on the release layer formed unevenly as described above to form a transfer layer, and even when the transfer is performed on the transfer target material using a transfer device, the release layer becomes uneven. Due to the formation, the transfer tends to be uneven.

The back treatment layer in the present invention can be applied to a substrate film having poor wettability by using a surfactant and / or a polymer compound soluble in a solvent in combination.

Examples of the surfactant include nonionic surfactants such as polyoxyethylene octyl phenyl ether, polyoxyethylene alkyl ether, and polyoxyethylene sorbitan fatty acid ester, and fluoroalkylcarboxylic acids, perfluoroalkylbenzenesulfonic acids, and the like. Perfluoroalkyl quaternary ammonium,
Fluorinated surfactants such as perfluoroalkylpolyoxyethylene ethanol can be used.

The amount of the surfactant used for forming the back surface treatment layer in the present invention is not particularly limited, but is usually 0.001 to 100 parts by weight of the π-electron conjugated conductive polymer. ~ 50 parts by weight, preferably 0.01 ~
10 parts by weight.

In the present invention, as a method for providing a back surface treatment layer comprising a conductive polymer (A) and a silicone-based graft polymer (B) on a base polyester film, there are provided a reverse roll coater, a gravure coater, a rod coater, an air doctor coater, and the like. Alternatively, a coating method using a coating apparatus other than the above may be used outside of the polyester film manufacturing step, or a method of applying inside the polyester film manufacturing step.

As a method of applying in the polyester film production process, 1) a method of applying a coating solution to an unstretched film of polyester and sequentially or simultaneously biaxially stretching the film;
2) A method of applying to a uniaxially stretched polyester film and further stretching in a direction perpendicular to the uniaxial stretching direction, 3) A method of applying to a biaxially stretched polyester film, 4) A method of applying to a biaxially stretched polyester film and And / or a method of stretching in the longitudinal direction. When applying in the polyester film manufacturing process, a drying process may be appropriately provided.

The transfer polyester film of the present invention is obtained by laminating a transfer layer formed by sequentially forming a release layer, a printing layer, and an adhesive layer on the surface of the polyester film opposite to the surface on which the back treatment layer is provided. When the surface of the transfer layer and the surface of the back treatment layer are overlapped and treated at 60 ° C. for 24 hours under a load of 0.29 MPa, it is preferable that the transfer layer does not transfer to the back treatment layer side. These can be achieved by employing the above means, but are not limited only to the above means.

The transfer material using the polyester film for transfer of the present invention has a back surface treatment layer provided on one side of the base polyester film, and a transfer layer (release layer, printing layer, (A layer in which an adhesive layer is sequentially laminated).

The release layer is released together with the base polyester film from the transfer layer when the base polyester film is peeled off after the transfer. The release layer material is paraffin-based release agent, silicone resin-based release agent, cellulose derivative-based release agent, melamine resin-based release agent, polyolefin resin-based release agent, fluororesin-based release agent, urea resin-based release agent A release agent and a mixture of these release agents can be used. The release layer is formed by a reverse coating method, a gravure coating method,
Examples thereof include a wire bar coating method and a screen printing method.

The printing layer is usually formed on the release layer, but a release layer may be provided on the release layer for the purpose of improving the releasability, and the printing layer may be formed thereon. The release layer is a layer which is peeled off from the base polyester film and becomes the outermost layer of the transferred material when the base polyester film is peeled after the transfer. Acrylic resin, polyester resin, cellulose resin, polyvinyl chloride resin,
A urethane resin, a polyvinyl acetate resin, or the like can be used. If the release layer requires hardness, use a thermosetting resin,
A curable resin such as an ultraviolet curable resin can also be used. Examples of the method for forming the release layer include a reverse coating method, a gravure coating method, a wire bar coating method, and a screen printing method.

As the material of the printing layer, acrylic resin,
Examples include polyester-based resins, polyvinyl-based resins, polyamide-based resins, polyurethane-based resins, cellulose-based resins, and alkyd-based resins. These resins are colored with a pigment or dye as a binder to form a printing ink. As a method for forming the printing layer, a normal printing method such as an offset printing method, a gravure printing method, and a screen printing method may be used. The printing layer may be formed of a metal thin film layer or a combination of a metal thin film layer and a printing layer.

The metal thin film layer is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like.
In some cases, a metal thin film layer is partially provided depending on a design to be expressed. As a method of partially forming a metal thin film layer, after forming a solvent-soluble resin on a portion that does not require a metal thin film layer, a metal thin film is formed on the entire surface thereof, and the metal thin film is washed with a solvent. There is a way to remove it. Water is often used as a solvent in this case. As another method, there is a method in which after forming a metal thin film on the entire surface, a resist layer is formed on a portion where the metal thin film is to be left, and the resist layer is removed by etching with an acid or an alkali.

The adhesive layer is a layer for adhering each layer of transfer onto the object to be transferred. It is necessary to select a resin suitable for the material of the transfer object for the adhesive layer. For example, if the material of the transfer object is a polystyrene-based resin or a polycarbonate-based resin, an acrylic resin, a polystyrene-based resin having an affinity for these,
Polyamide resin, ester resin, urethane resin,
An ester urethane resin may be used. Also,
When the material of the transfer object is an acrylic resin, an acrylic resin is preferably used. Further, when the resin of the transfer object is polypropylene, a chlorinated polyolefin resin or the like can be used. Examples of the method for forming the adhesive layer include a gravure coating method, a reverse coating method, a wire bar coating method, and a comma doctor coating method.

As a method of transferring these transfer films,
After setting the transfer film so that the adhesive layer is in contact with the molding resin in the mold of the injection molding machine or the blow molding machine, and the method of transferring to the transferred object with the heating roll using the transfer device,
In general, so-called simultaneous molding transfer is performed in which a molding resin is injected or blown, a molded product is taken out from a mold after cooling, and a transfer film is peeled off.

[0049]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples. In the examples and comparative examples, “parts” means “parts by weight”. The properties of the films of Examples and Comparative Examples were evaluated by the following evaluation methods.

1) Surface resistivity The film sample was treated at a temperature of 23 ° C. and a humidity of 50% RH for 24 hours.
After seasoning for a time, the temperature was measured using a surface resistivity meter (manufactured by Mitsubishi Yuka: Hiresta HT-201) at a temperature of 23.
It is measured in an atmosphere at 50 ° C. and a humidity of 50% RH.

2) Transferability of Back Treatment Layer to Polyester Film The non-treatment surface side of the polyester film and the back treatment layer side are overlapped, and a load of 0.20 MPa is applied. After standing for 15 minutes, the non-processed surface side and the back-processed layer side surface of the stacked films are manually peeled off, the solid content concentration of paraffin wax is adjusted to 3 wt% with a solvent, and non-processed with a wire bar # 3. Hand coat the surface. The coated surface was visually determined and ranked as follows. ○: No repelling on coated surface ×: Repelling on coated surface

3) Adhesion between Back Processing Layer and Transfer Layer Adhesive An ester resin having a glass transition point of 6 ° C. was dissolved as an adhesive on a surface of the PEs film opposite to the back processing layer with a solvent, and the solid content concentration was 20 wt. % Coating solution. After hand-coating with a wire bar # 5 and drying, the surface on the adhesive layer side and the surface on the back processing layer side are overlapped, and a temperature of 60 ° C. is applied under a load of 0.29 MPa.
For 24 hours. The surface of the film on the side of the adhesive layer and the surface of the film on the back side are peeled off by hand, and the adhesion (blocking) is visually determined. ○: No adhesion between adhesive layer and backside treatment layer ×: Adhesion between adhesive layer and backside treatment layer (film may be broken)

4) Amount of solid coating A film sample is cut into a size of 10 cm × 10 cm. Using a direct balance (manufactured by Shimadzu Corporation), weigh the g
Measure up to 4 decimal places in units. After the measurement, the coated surface is completely removed with a solvent of methyl ethyl ketone. Measure the weight again and calculate the weight difference. If the weight difference is multiplied by 100,
The solid coating amount (g / m ² ) can be calculated.

(Synthesis Example) Preparation of coating solution of sulfonic acid group-containing polyaniline 100 mol of 2-aminoanisole-4-sulfonic acid was added to 2
The mixture was stirred and dissolved in a 4 mol / liter aqueous ammonia solution at 3 ° C., and 100 mol of ammonium peroxodisulfate was dropped into the aqueous solution. After completion of the dropwise addition, the mixture was further stirred at 23 ° C. for 10 hours, and the reaction product was separated by filtration, washed and dried to obtain 13 g of a powdery copolymer. The volume resistivity of this copolymer is 1
It was 2.6 Ω · cm. 3 parts by weight of the polymer is 0.3
A conductive composition was prepared by stirring and dissolving at room temperature in 100 parts by weight of a sulfuric acid aqueous solution of mol / liter. At this time, the sulfonic acid group content of the sulfonated polyaniline was 100%.
5 parts by weight of the above sulfonated polyaniline was dissolved in 95 parts by weight of water.

Example 1 The above sulfonated polyaniline (solid content: 5% by weight)
9.6 parts by weight and a silicone-based acrylic resin, the trunk of which is an acrylic resin, the branched silicone polymer (molecular weight: 1)
000) copolymerized graft polymer (molecular weight: about 2
20,000, solid content: 30% by weight), 27.2 parts, and 0.20 part of a surfactant (Emulgen 810, manufactured by Kao Corporation, solid content concentration: 10% by weight) were added, and the solid content was 3%.
The coating liquid was adjusted with a mixed solvent of water / IPA so as to be in a weight%. This coating solution was coated on a 38 μm-thick biaxially stretched polyethylene terephthalate film (manufactured by Toyobo Co., Ltd.
E5100). In No. 3, application was performed so that the thickness after drying was 0.15 g / m ^2, and the coating was dried in a hot air dryer at 160 ° C. for 1 minute to obtain a film having a back surface treatment layer. Table 1 shows the properties of the obtained polyethylene terephthalate film for transfer.

Example 2 The same procedure as in Example 1 was conducted except that the solid content ratio of the sulfonated polyaniline and the silicone-based acrylic resin was changed to 70/30. Table 1 shows the properties of the obtained polyethylene terephthalate film for transfer.

Example 3 Except that the coating thickness of the back treatment layer after drying was 0.05 g / m ² and the amount of the surfactant was 7 parts by weight based on 100 parts by weight of the solid content of the sulfonated polyaniline. Performed in the same manner as in Example 1. Table 1 shows the properties of the obtained polyethylene terephthalate film for transfer.

Comparative Example 1 The procedure of Example 1 was repeated, except that the polyethylene terephthalate film was not provided with a back surface treatment layer. Table 1 shows the properties of the obtained polyethylene terephthalate film.

Comparative Example 2 In Example 1, the back surface treatment layer was formed by adding an addition-reaction emulsion silicone resin (SM320, manufactured by Toshiba Silicone Co., Ltd.).
Example 1 was carried out in the same manner as in Example 1 except that 0) was used. Table 1 shows the properties of the obtained polyethylene terephthalate film.

[0060]

[Table 1]

[0061]

The transfer polyester film of the present invention has a specific back treatment layer on one side of the base polyester film, and a transfer material having a transfer layer provided on the opposite side of the back treatment layer is formed into a roll. Even if the uppermost adhesive layer of the transfer layer used for imparting the winding and high-speed transfer functions is in close contact with the polyester on the opposite side, the specific back treatment layer with excellent solvent resistance is provided. The layers do not transfer to the opposite side.
Therefore, the transfer layer (adhesive layer / print layer) can be transferred from the transfer material to the transfer target at a high speed. Further, it is possible to prevent troubles caused by static electricity during the process of manufacturing the transfer material and during transfer. The film of the present invention can be applied to not only a polyester film for transfer but also a polyester film for mold release.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) // B29L 9:00 B29L 9:00 F term (reference) 3B005 FB01 FB21 FE04 FE11 FE17 FE39 FG04X GA06 GB01 4F100 AK25B AK41A AK42A AK52B AR00C AR00D AR00E BA05 BA07 BA10E DE01B EC04 GB90 HB01D JG00B JL13E JL14C 4F206 AA13 AA21 AA28 AD10 AG03 JA07 JB13 JB19 JF05 4J002 AA00W AA03W BN11X BN12X

Claims (8)

[Claims] 1. A conductive film (A) and a silicone-based graft polymer (B) on one side of a polyester film.
The polyester film has a surface specific resistance (Rs) of 1 × on the back transfer layer side of the polyester film.
A transfer polyester film having a resistivity of 10 ¹² Ω / □ or less. 2. The polyester film for transfer according to claim 1, wherein the conductive polymer (A) is a π-electron conjugated conductive polymer. 3. The transfer material according to claim 1, wherein a trunk portion of the silicone-based graft polymer (B) is an acrylic polymer and a branch portion is a comb-shaped graft polymer composed of silicone. Polyester film. 4. The conductive polymer (A) and the silicone-based graft polymer (B) are contained in the back treatment layer in an amount of 80%.
The transfer polyester film according to any one of claims 1 to 3, wherein the polyester film is contained in a weight ratio of / 20 to 5/95. 5. The method according to claim 1, wherein when the polyester film having the back treatment layer is wound into a roll, the back treatment layer does not transfer to the opposite surface of the film. The transfer polyester film according to any one of the above. 6. A transfer layer formed by sequentially forming a release layer, a printing layer, and an adhesive layer on a surface of the polyester film opposite to the surface on which the back treatment layer is provided. Under the load of 0.29MPa, 6
The transfer layer does not transfer to the backside treatment layer side when treated at 0 ° C. for 24 hours.
4. The transfer polyester film according to any one of items 4 and 5. 7. The solid coating amount of the back treatment layer is 0.01
Claim 1, which is a to 2.0 g / m ^2,
The polyester film for transfer according to any one of 2, 3, 4, 5, and 6. 8. The method according to claim 1, wherein the polyester film is polyethylene terephthalate.
The transfer polyester film according to any one of 2, 3, 4, 5, 6, and 7.