JPH1152608A - Recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording sheet of an electrophotographic method in which attachment of silicone oil to the recording sheet itself to cause stickiness, glaringness, or generation of image quality deterioration by oil can be prevented, and in which fusion to a fixing roller at the time of fixing or cohesive failure of an acceptor layer itself to cause deterioration of transparency can be eliminated to provide high image quality in an oilless fixing system. SOLUTION: In a recording sheet having an acceptor layer for forming a toner image at least on one surface of a base film, a component having releasing effect is added to the acceptor layer, so fusion of the recording sheet to a fixing roller at the time of fixing, or cohesive failure of the acceptor layer itself is eliminated because of the component having the releasing effect on the recording sheet side in recording in an electrophotographic method without using oil on the side of a copying machine or printer at the time of heating and pressurizing for fixing, thereby recording of high image quality in the electrophotographic method can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic recording sheet, and more particularly, to a method in which oil is not used at the time of heating and pressure fixing to prevent deterioration of image quality and high transparency. The present invention relates to a recording sheet that can be used as an OHP film.

[0002]

2. Description of the Related Art Recently, a method of forming a full-color image has been put to practical use by using an electrophotographic system and mixing three colors of yellow, magenta, and cyan, or a mixture of four colors of toner obtained by adding black to the above three colors. I have. The recording sheet used in the electrophotographic method generally has a configuration in which a receiving layer is formed on a base material in order to reliably record and hold recording information such as characters and images. This recording sheet is used for an OHP (overhead projector) as an information transmission means used in, for example, lectures, schools, companies, other briefings and exhibitions.

[0003] In the electrophotographic system, when fixing toner on a recording sheet, a method is generally used in which the toner is transferred to the recording sheet and then heated and pressed against a roller. Further, in order to prevent offset of the toner itself, a mechanism is generally adopted in which silicone oil is constantly applied to the fixing roller to lower the affinity between the toner and the roller. In addition, when recording a color image on a plastic base material, especially OH
In the case of the P application, a receiving layer having a high affinity for the toner is generally applied to the surface of the recording sheet in order to improve the transparency of the image. At this time, the offset of the receiving layer itself applied is also prevented by the effect of the silicone oil.

[0004]

On the other hand, in recent years, as the demand for high image quality of the recording sheet has increased, the recording sheet itself has been adhered with silicone oil and is sticky, too shiny, or has deteriorated image quality due to oil. There is a problem that occurs. In recent years, the demand for an oil-less fixing system has been increasing due to environmental problems and the like.However, in the case of a recording sheet provided with a current receiving layer, the recording sheet may be fused to a fixing roller at the time of fixing, or the recording sheet may be received. There is a problem that the layer itself undergoes cohesive failure and the transparency is impaired.

Accordingly, an object of the present invention is to solve the above-mentioned problems by preventing the recording sheet itself from adhering silicone oil to the recording sheet and preventing the recording sheet from sticking, being too shiny, and causing deterioration in image quality due to the oil. In addition, even in an oilless fixing system, an electrophotographic recording method that can obtain high image quality without fusing to a fixing roller at the time of fixing, or causing a cohesive failure of a receiving layer itself and losing transparency. To provide a seat.

[0006]

Means for Solving the Problems To achieve the above object, the present invention provides at least one surface of a base film,
A recording sheet having a receiving layer for forming a toner image is characterized in that a component having a releasing effect is added to the receiving layer. Further, it is preferable that the component having the releasing effect has a functional group that reacts with the resin forming the receiving layer. Further, it is preferable that the component having the releasing effect is made of a Si group. Further, it is preferable that the component having the releasing effect is composed of an F group. Further, it is preferable that the component having the releasing effect is made of wax. Further, it is preferable that the component having the releasing effect is made of an inorganic and / or organic filler. Further, it is preferable that the component having the releasing effect is composed of a surfactant. Further, it is preferable that the component having the releasing effect is made of metal soap.
Further, the substrate film is characterized in that the parallel line transmittance is 70% or more.

The operation of the present invention is as follows. The recording sheet of the present invention has a receiving layer for forming a toner image on at least one surface of the base film, and a component having a releasing effect is added to the receiving layer, whereby the recording sheet is heated. In the case of electrophotographic recording that does not use oil on the copier or printer side when fixing with pressure, there is a component that has a release effect on the recording sheet side, so the recording sheet is fused to the fixing roller during fixing And high-quality electrophotographic recording can be obtained without causing damage or cohesive failure of the receiving layer itself.

[0008]

Next, an embodiment of the present invention will be described. The recording sheet of the present invention has a receiving layer for forming a toner image on at least one surface of a base film, and a component having a releasing effect is added to the receiving layer. Is what you do.

(Base Film) As the base film used in the recording sheet of the present invention, the recording sheet is, for example, O
For use in observing a recorded image with transmitted light using an HP film or the like, a film formed of a thermoplastic resin having transparency, heat resistance, dimensional stability, and rigidity is preferable. Specifically, a polyethylene terephthalate resin, a polycarbonate resin, an acrylic resin, a polyvinyl chloride resin, a polypropylene resin, a polystyrene resin, a polyethylene resin, a cellulose diacetate resin, a cellulose triacetate resin, etc., a thickness of about 10 to 250 μm, preferably A film or sheet having a thickness of about 50 to 180 μm is exemplified. Among them, a polyethylene terephthalate resin, a polyvinyl chloride resin, a polypropylene resin, and a cellulose triacetate resin are more preferable in view of the above performance.

When a recording sheet is used for observing a recorded image with transmitted light using an OHP film or the like, the base film preferably has a parallel line transmittance of 70% or more. If the parallel line transmittance of the base film is less than 70%, it is not preferable to provide a layer such as a receiving layer on the base film, because the transparency of the recording sheet is reduced. For the purpose of improving the adhesion to the layer formed on the substrate film, the surface of the substrate film may be subjected to a known easy adhesion treatment such as a primer treatment or a corona discharge treatment.

(Receiving Layer) The receiving layer provided on at least one surface of the base material has a toner fixing property, and particularly for a full color electrophotographic OHP application, a resin excellent in wettability of a color toner is preferable. Examples of the resin forming the receiving layer include polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyacrylate, vinyl resins such as polystyrene, and polyethylene. Polyester resins such as terephthalate and polybutylene terephthalate, polyamide resins, copolymers of olefins such as ethylene and propylene with other vinyl monomers, ionomers, cellulose resins such as ethyl cellulose and cellulose acetate, polycarbonate resins, phenoxy resins, etc. And a vinyl resin or a polyester resin is particularly preferably used. The above resins may be used alone or in a mixture. However, when transparency is required for OHP applications, it is necessary to select and use resins having good compatibility.

In the recording sheet of the present invention, the receiving layer contains the above resin and a component having a releasing effect. The component having a releasing effect is a component having a releasing effect without being fused to a roller at the time of heating, pressing and fixing the toner when forming an image on the receiving layer of the recording sheet. .
Examples of the component having a releasing effect include a releasing agent having a functional group that reacts with a resin forming the receiving layer. For example, as a resin forming the receiving layer, a polymer having a reactive group such as a hydroxyl group, a carboxyl group, an amino group, or an epoxy group in a skeleton of a main chain is used, and a releasing effect is given to the reactive group of the polymer. As a component having the compound, a silicone compound having a functional group such as a carboxyl group, a hydroxyl group, an amino group, an epoxy group, or an isocyanate group, a fluorine compound, or the like is added and reacted to add silicone or fluorine. In addition, this reaction is mostly performed when applying heat or light when drying after coating the receiving layer coating liquid. When a component having such a releasing effect reacts with the resin forming the receiving layer, a component having a releasing effect is added, compared with a component that does not react as described above.
It is preferable because the heat resistance is further improved.

The components having a releasing effect include Si compounds such as silicone compounds, silicone oils and silicone resins.
And those having a component consisting of a group. In particular, a modified silicone oil such as epoxy-modified, vinyl-modified, alkyl-modified, amino-modified, carboxyl-modified, alcohol-modified, fluorine-modified, alkyl-aralkyl-polyether-modified, epoxy-polyether-modified, polyether-modified is added to the receiving layer. Cured ones are preferred. The amount of the modified silicone oil to be added varies depending on the type thereof. However, the total solid content of the modified silicone oil is about 1 to 20 parts by weight with respect to 100 parts by weight of the solid content of the receiving layer resin. A minimum amount at which the performance is sufficiently exhibited is preferable. In the modified silicone oil, when adding a modified silicone oil having a reactive group capable of reacting with a curing agent such as an isocyanate compound, an amino compound, and an organometallic compound, the equivalent of the reactive group of the modified silicone oil and the curing agent is added.
It is preferable to set it in the range of 1: 1 to 1:10.

Further, as a component comprising the F group, a fluorine resin obtained by polymerization of an olefin containing fluorine as represented by the trade name of Teflon, or a fluorine-containing polymer or copolymer obtained by processing a fluorine-containing polymer or copolymer into rubber. Rubber and a fluorine compound can be used as a component having a releasing effect.
Examples of the component having a releasing effect include wax, and examples thereof include microcrystalline wax, carnauba wax, and paraffin wax. Furthermore, Fischer-Tropsch wax, various low molecular weight polyethylenes, wood wax, beeswax, whale wax, Ibota wax, wool wax, shellac wax, candelilla wax, petrolactam,
Various waxes such as polyester wax, partially modified wax, fatty acid ester, fatty acid amide, polyethylene wax, sterol wax and the like can be mentioned.

It is possible to use a component having a releasing effect composed of an inorganic and / or organic filler. Examples of the organic filler include a filler made of an organic resin such as a tetrafluoroethylene resin, a fluororesin such as an ethylene-tetrafluoroethylene copolymer, a polyethylene resin, a polystyrene resin, an acrylic resin, a polyamide resin, and a benzoguanamine resin. . On the other hand, as the inorganic filler, silica, colloidal silica, alumina, kaolin, clay,
Examples include calcium carbonate, talc, titanium dioxide, calcium carbonate, and the like. The average particle size of the filler to be contained is preferably in the range of 0.1 to 10 μm. If the average particle size is less than 0.1 μm, the desired effect cannot be sufficiently obtained.
This is not preferable because transparency when used for HP is reduced.

Further, a component having a releasing effect consisting of a surfactant can be used. Examples of the surfactant include an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, and a fluorine-based surfactant. In particular, it is preferable to use a liquid activator at room temperature, such as a phosphate ester-based surfactant. In addition, a component having a releasing effect made of metal soap can be used. Metal soaps are non-alkali metal long chain fatty acid salts, for example, zinc stearate, calcium stearate, magnesium stearate, aluminum stearate, strontium stearate, barium stearate, lithium stearate, lithium 12-hydroxystearate And zinc laurate, calcium laurate, barium laurate, lead benzoate, zinc para-tert-butylbenzoate, barium para-tert-butyl benzoate, sodium stearate, potassium stearate, sodium oleate and the like. Further, as phosphate ester metal salts, stearyl acid phosphate, magnesium stearyl acid phosphate, aluminum stearyl acid phosphate, calcium stearyl acid phosphate, zinc stearyl acid phosphate, barium stearyl acid phosphate, zinc behenyl acid phosphate Can be used.

The content of the above-mentioned components having various releasing effects is preferably in the range of 0.01% by weight to 50% by weight based on the resin for forming the receiving layer. If the content is too large, the transparency may be reduced. In particular, when transparency is required, it is necessary to adjust the addition amount so as to suppress the haze to 10 or less. On the other hand, if the content is too small, the desired effect of improving the offset prevention performance cannot be obtained. In the receiving layer, other additives having the above-mentioned releasing effect may be mixed and used as long as the effects of the present invention are not impaired. The receiving layer is formed by applying a coating liquid containing the above resin component, other fine particles, various additives as necessary, using a known printing means such as gravure printing, silk screen printing, or a known coating method such as gravure coating. The thickness is about 0.5 to 10 μm when dried.

(Antistatic Layer) The recording sheet of the present invention has a receiving layer on one side of a base film, and an antistatic layer on the receiving layer and / or on the other side of the base film. It can also be provided. The antistatic layer is formed mainly of a binder resin and an antistatic agent. However, if the antistatic agent is a resin and the adhesion to the layer in contact with the antistatic layer is good, the antistatic layer may be formed without a binder. As the binder resin, for example, polyester resin, polyurethane resin, polyacrylic resin, polyvinyl formal resin, epoxy resin, polyvinyl butyral resin, polyamide resin, polyether resin, polystyrene resin, styrene -Acrylic copolymer resins.

As the material used as the antistatic agent, any of conventionally known cations, anions, zwitterions and nonionics can be used. For example, quaternary ammonium salts, cationic antistatic agents such as polyamine derivatives, anionic antistatic agents such as alkyl phosphates,
Nonionic antistatic agents such as fatty acid esters are exemplified. Further, as a resin type antistatic agent, those obtained by grafting the above antistatic agent to a resin such as acrylic, π
A conductive polymer material having an electron conjugated structure can also be used. Conductive polymer materials include sulfonated polyaniline, chemically doped polyacetylene, polyparaphenylenevinylene, polyparaphenylene sulfide, chemically polymerized and doped polypyrrole, polythiophene, polyaniline, and heat-treated phenolic resin produced by heat treatment. , Heat treatment of polyamide, heat treatment of perylene anhydride, and the like. Furthermore, SnO
₂ , ZnO, In ₂ O ₃ , and Sb-doped SnO ₂ . Prevention of heavy running due to blocking that occurs when recording sheets are fed to a copier or printer,
In order to prevent poor transport inside the printer, the same antistatic and organic and / or inorganic fillers that are added to the receptor layer can be added to the antistatic layer.

The antistatic layer of the present invention is formed from the above binder resin, an antistatic agent and other additives as required. The method of forming the antistatic layer is a solvent containing water, for example, water, methanol, ethanol, A coating liquid is prepared by dissolving or dispersing the binder resin and the antistatic agent in a mixture with a water-soluble organic solvent such as isopropyl alcohol and normal propyl alcohol. An optional additive such as a surfactant for improving the wettability at the time of coating and an antifoaming agent for suppressing bubbles can be added to the coating liquid. In particular, a phosphate ester-based surfactant is preferably used as the surfactant.

The composition of the coating solution for the antistatic layer is such that the binder resin is about 0.5 to 10% by weight, preferably 0.7 to 10% by weight.
5 to 2% by weight, antistatic agent (solid content) is about 0.01 to 3
%, Preferably from 0.01 to 1% by weight, the surfactant being about 0 to 2% by weight, preferably 0.2 to 1% by weight and the balance of the solvent being preferred. In the case of using only an antistatic agent without a binder resin, the antistatic agent is appropriately diluted and applied with a solvent. The antistatic layer is formed by applying and drying the above coating solution on a recording sheet by a conventional coating method such as a gravure coater, a roll coater, and a wire bar. The coating amount of the antistatic layer is about 0.5 as a solid content of the coating solution.
When the coating amount is less than the above range, the performance as an antistatic layer is insufficient, while the coating amount is in the above range. Even if it is larger, the above performance is not improved in proportion to the thickness, which is not only economically disadvantageous but also undesirably lowers the density of an electrophotographic image.

In the recording sheet of the present invention, the surface resistance value is 1
It is preferable that the surface resistance is in the range of 0 ⁷ to 10 ¹³ Ω / sq. When the surface resistance is in this range, the toner fixing property is good, the image quality is excellent, and the transport suitability in an electrophotographic copying machine and a printer is also good. . In the present invention, the surface resistance of the front surface and the back surface of the recording sheet, that is, the sheet resistance, the receiving layer,
The thickness of each layer of the coating layer and the base film containing the antistatic layer, the ratio of the resin mixed with the antistatic agent in the antistatic layer, and the mixing ratio of water, the organic solvent and the surfactant of the antistatic layer By appropriately adjusting the conductivity of the receiving layer and the antistatic layer, the desired sheet resistance can be controlled. For example, if the thickness of the antistatic layer is increased, the sheet resistance decreases. If the surface resistance of the recording sheet is lower than 10 ⁷ Ω / sq, image defects (image loss) tend to occur, and conversely 1 ×
If it exceeds 10 ¹³ Ω / sq, image defects (insufficient density), and poor conveyance easily occur in electrophotographic copying machines and printers due to generation of static electricity and lack of lubricity.

[0023]

Next, the present invention will be described in detail with reference to examples. In the following description, parts or% are based on weight unless otherwise specified. (Example 1) On one surface of a substrate film shown below, a receiving layer coating liquid 1 having the following composition was formed with a bar coater so that the thickness when dried was 3.0 μm, and the receiving layer was formed. The antistatic layer coating solution having the following composition was dried on the receiving layer and had a surface electric resistivity of 1 × 10 ¹⁰ Ω / sq (at a temperature of 23 ° C. and a humidity of 50).
% RH) to form an antistatic layer.
A recording sheet of Example 1 of the present invention was obtained. Base film 75 μm thick polyethylene terephthalate film (Lumirror T-60, manufactured by Toray) Parallel line transmittance 92%

Receptive layer coating liquid 1 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) Silicone-modified acrylic resin solution 10 parts (Toa Gosei Chemical Co., Ltd.) Manufacture, US-3700) 30 parts of methyl ethyl ketone 30 parts of toluene

Antistatic layer coating liquid Quaternary ammonium antistatic agent (TB-34, manufactured by Matsumoto Yushi Co., Ltd.) 0.1 part IPA 200 parts

(Example 2) A recording sheet of Example 2 was prepared in the same manner as in Example 1 except that the coating liquid 1 for the receiving layer in Example 1 was changed to the coating liquid 2 for the receiving layer having the following composition. . Receptive layer coating liquid 2 Polyester resin (HP301, manufactured by Nippon Synthetic Chemical Co., Ltd.) 18 parts (Glass transition temperature 62 ° C., softening point 105 ° C.) Silicone 2 which reacts with the resin for forming the receiving layer 2 parts (Matsumoto Trading Co., Ltd. ORGATICS SI220) methyl ethyl ketone 40 parts toluene 40 parts

Example 3 A recording sheet of Example 3 was prepared in the same manner as in Example 1 except that the receiving layer coating liquid 1 of Example 1 was changed to the receiving layer coating liquid 3 having the following composition. . Coating solution for receiving layer 3 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 17 parts (Glass transition temperature 62 ° C, softening point 95 ° C) Silcon oil (KF54, manufactured by Shin-Etsu Chemical Co., Ltd.) 3 parts Methyl ethyl ketone 40 parts Toluene 40 parts

Example 4 A recording sheet of Example 4 was prepared in the same manner as in Example 1 except that the receiving layer coating liquid 1 of Example 1 was changed to the receiving layer coating liquid 4 having the following composition. . Receptive layer coating liquid 4 Polyester resin (HP301, manufactured by Nippon Synthetic Chemical Co., Ltd.) 15 parts (Glass transition temperature 62 ° C, softening point 105 ° C) Vinyl-modified silicone (XF40-A1987, manufactured by Toshiba Silicone) 5 parts Platinum catalyst 0 .01 parts Methyl ethyl ketone 40 parts Toluene 40 parts

Example 5 A recording sheet of Example 5 was prepared in the same manner as in Example 1 except that the receiving layer coating liquid 1 of Example 1 was changed to the receiving layer coating liquid 5 having the following composition. . Receptive layer coating liquid 5 Polyester resin (HP301, manufactured by Nippon Synthetic Chemical Co., Ltd.) 16 parts (Glass transition temperature 62 ° C, softening point 105 ° C) Epoxy-modified silicone (XF42-A4439, manufactured by Toshiba Silicone) 4 parts Methyl ethyl ketone 40 parts 40 parts of toluene

Example 6 A recording sheet of Example 6 was prepared in the same manner as in Example 1 except that the receiving layer coating liquid 1 of Example 1 was changed to the receiving layer coating liquid 6 having the following composition. . Receptive layer coating liquid 6 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) Fluorine release agent (FC430, manufactured by Mitsui Fluorochemicals Co., Ltd.) 1 part Methyl ethyl ketone 35 parts Toluene 35 parts

(Example 7) The receiving layer coating liquid 1 of Example 1 was changed to a receiving layer coating liquid 7 having the following composition, and an antistatic layer having the following composition was formed on the receiving layer and on the other surface of the base film. The surface electric resistivity when drying the layer coating solution is 1 × 10 ¹⁰ Ω / sq (temperature 2
3 ° C., humidity 50% RH) to form an antistatic layer to obtain a recording sheet of Example 7 of the present invention. Receptive layer coating liquid 7 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) carnauba wax 3 parts methyl ethyl ketone 35 parts toluene 35 parts

The receiving layer coating liquid 7 was applied after dissolving the above materials in a hot water bath heated to 80 ° C. (Thickness when dried is 3.0 μm) Antistatic layer coating liquid Quaternary ammonium antistatic agent (TB-34, manufactured by Matsumoto Yushi Co., Ltd.) 0.1 part IPA 200 parts

Example 8 A recording sheet of Example 8 was prepared in the same manner as in Example 7 except that the coating liquid 7 for the receiving layer in Example 7 was changed to the coating liquid 8 for the receiving layer having the following composition. . Receptive layer coating liquid 8 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) 3 parts Fischer-Tropschwax (manufactured by Sasol, H1) 3 parts Methyl ethyl ketone 35 parts Toluene 35 Department

Example 9 A recording sheet of Example 9 was produced in the same manner as in Example 7 except that the coating liquid 7 for the receiving layer in Example 7 was changed to the coating liquid 9 for the receiving layer having the following composition. . Receptive layer coating liquid 9 polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) sterol wax 3 parts methyl ethyl ketone 35 parts toluene 35 parts

(Example 10) Coating liquid 1 for receiving layer of Example 1
Was changed to the receiving layer coating liquid 10 having the following composition, and a recording sheet of Example 10 was produced in the same manner as in Example 1. Receptive layer coating liquid 10 polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) silica particles (particle size 5 μm) 0.6 parts methyl ethyl ketone 35 parts toluene 35 parts Incidentally, the receiving layer coating liquid 10 is obtained by dissolving the resin in a solvent,
The silica particles were dispersed and applied. (Thickness when dried is 3.0 μm)

(Example 11) Receptive layer coating liquid 1 of Example 1
Was changed to the receiving layer coating liquid 11 having the following composition, and a recording sheet of Example 11 was produced in the same manner as in Example 1. Receptive layer coating liquid 11 polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) Organic filler (PMMA particles, particle size 5 μm) 0.6 part (Soken Chemical) (Mfg. Co., Ltd., MR-7G) Methyl ethyl ketone 35 parts Toluene 35 parts

(Example 12) Receptive layer coating liquid 1 of Example 1
Was changed to the receiving layer coating liquid 12 having the following composition, and a recording sheet of Example 12 was produced in the same manner as in Example 1. Receptive layer coating liquid 12 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) Phosphate ester (Sakai Chemical, LBT-100, melting point 70 ° C.) 3 Parts methyl ethyl ketone 35 parts toluene 35 parts

(Example 13) Receptive layer coating liquid 1 of Example 1
Was changed to the receiving layer coating liquid 13 having the following composition, and a recording sheet of Example 13 was produced in the same manner as in Example 1. Receptive layer coating liquid 13 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) Metal soap (zinc stearate, SZ-2000, melting point 125 ° C.) 3 parts 35 parts of methyl ethyl ketone 35 parts of toluene

Comparative Example 1 Example 1 was repeated except that the receiving layer coating liquid 1 of Example 1 was changed to the receiving layer coating liquid 14 having the following composition.
In the same manner as in the above, a recording sheet of Comparative Example 1 was produced. Receptive layer coating liquid 14 Polyester resin (HP320, manufactured by Nippon Synthetic Chemical Co., Ltd.) 30 parts (glass transition temperature 62 ° C., softening point 95 ° C.) methyl ethyl ketone 35 parts toluene 35 parts

Using the recording sheets of the above Examples and Comparative Examples, evaluation of fixing suitability and image quality was performed by the following methods. (Evaluation method) Fixing aptitude Images were recorded on the recording sheets of each example and comparative example using a self-made full-color LBP (oil-less fixing system using a laser beam printer). I checked if I don't wear it. The criteria are as follows. ：: The receiving layer of the recording sheet does not offset after fixing. X: The receiving layer of the recording sheet is offset after fixing.

Image Quality Using a self-made full-color LBP (oil-less fixing system using a laser beam printer), color charts are copied on the recording sheets of the respective examples and comparative examples, and the obtained images are image-processed by an OHP projector. The quality was evaluated.
The criteria are as follows. ：: The transmitted image is clear. X: There is an unclear portion in the transmission image.

(Evaluation Results) Tables 1 and 2 show the evaluation results of the examples and comparative examples.

[Table 1]

[Table 2]

[0043]

The recording sheet of the present invention has a receiving layer for forming a toner image on at least one surface of a base film, and a component having a releasing effect is added to the receiving layer. With this, even in an oilless fixing system, a high-quality electrophotographic recording sheet that does not impair transparency by fusing to the fixing roller during coagulation or causing the cohesive failure of the receiving layer itself. Is obtained.

Claims (9)

[Claims] Claims: 1. At least one surface of a substrate film,
A recording sheet having a receptor layer for forming a toner image, wherein a component having a releasing effect is added to the receptor layer. 2. The recording sheet according to claim 1, wherein the component having the releasing effect has a functional group that reacts with a resin forming the receiving layer. 3. The recording sheet according to claim 1, wherein the component having the releasing effect comprises a Si group. 4. The recording sheet according to claim 1, wherein the component having the releasing effect comprises an F group. 5. The recording sheet according to claim 1, wherein the component having the releasing effect comprises wax. 6. The recording sheet according to claim 1, wherein the component having the releasing effect comprises an inorganic and / or organic filler. 7. The recording sheet according to claim 1, wherein the component having the releasing effect comprises a surfactant. 8. The recording sheet according to claim 1, wherein the component having the releasing effect is made of a metal soap. 9. The base film having a parallel line transmittance of 7
The recording sheet according to any one of claims 1 to 8, wherein the content is 0% or more.