JP3063933B2 - Record sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording sheet, and more particularly to a recording sheet suitable for use as a slip such as a single sheet or a continuous sheet.

[0002]

2. Description of the Related Art Recording sheets are used for various purposes. For example, in a copy slip, a recording sheet and a recording sheet (usually made of paper) are laminated and the front side of the recording sheet is formed. Type pressure applied to the (receiving layer side),
The required amount of ink is transferred onto the recording sheet in the form of characters or graphics from the ink layer provided on the back side of the recording sheet by writing pressure, heat, or the like.

Conventionally, paper has been the dominant support for such recording sheets. For example, in the case of transportation slips such as courier services, the recording sheets located on the slip surface require durability and weather resistance. Therefore, a recording sheet using a plastic film, which is more durable than paper, as a support has been used. However, the film support is excellent in durability and weather resistance, but is inferior in printability and writability as it is, so various surface modifications have been devised. The structure of a recording sheet using a conventional film as a support usually adopts a layer structure of a receiving layer / a film support / an ink layer, and the receiving layer comprises a polymer resin layer having easy adhesion to ink. Coating, polymer resin layer containing antistatic agent, receiving layer with antistatic effect, and receiving layer containing inorganic or organic particles to give print clarity, etc. Are known.

[0004]

However, in a conventional recording sheet using a film as a support, the adhesion between the film support and the receiving layer or the ink layer is insufficient, especially when a temperature change occurs. There was a possibility that the adhesion between the film support and the receiving layer or the ink layer became insufficient. In addition, since the flexibility of the film support is insufficient, there is room for improvement in processability and handling properties of the entire recording sheet. Further, the whiteness is insufficient, and it is desired to further improve the print clarity. Further, there is a problem that the antistatic agent in the receiving layer migrates to the surface with the passage of time and easily falls off, and the receiving layer lacks the durability of the antistatic effect. Therefore, it is easy to be charged particularly at the time of printing, and it is easy to cause printing unevenness and adhere dust and the like. As described above, there is also a problem that it is difficult to achieve both the antistatic property and the easy adhesion property of the ink and the toner.

[0005] The present invention solves the above problems,
It can exhibit excellent adhesion to temperature changes (good thermal dimensional stability), has sufficient flexibility (cushioning properties) and whiteness, and is excellent in workability, handling, print clarity, and SUMMARY OF THE INVENTION An object of the present invention is to provide a recording sheet having excellent characteristics, which is excellent in persistence of an antistatic effect of a receiving layer and is compatible with antistatic properties and easy adhesion of ink and toner.

[0006]

According to the present invention, there is provided a recording sheet comprising a receiving layer, a film support and a transfer type ink layer, wherein the film support has a thickness of 15 mm.
A polyester film having a heat shrinkage at 0 ° C. of less than 2% and a specific gravity of 1.2 or less, wherein the receiving layer comprises a layer containing a polymer binder and a white hidden pigment.

[0007] The material of the film support of the present invention is not particularly limited as long as it is polyester. Polyester film is a generic term for a polymer film having an ester bond as a main bonding chain of its main chain. Particularly preferred polyesters are polyethylene terephthalate and polyethylene 2,6.
-Naphthalate, polyethylene α, β-bis (2-chlorophenoxy) ethane 4,4′-dicarboxylate,
Polybutylene terephthalate and the like, among which polyethylene terephthalate (hereinafter sometimes abbreviated as PET) is most preferable in consideration of quality, economy and the like. In addition, known additives in the PET, for example, heat stabilizers, oxidation stabilizers, weather stabilizers, ultraviolet absorbers, organic lubricants, pigments, dyes, organic or inorganic fine particles, fillers, release agents Molding agents, antistatic agents, nucleating agents and the like may be blended.

The PET film is unoriented, uniaxially oriented,
Although any of biaxial orientations can be used, a biaxially oriented PET film is preferable because of its excellent mechanical strength. The biaxially oriented PET film is formed by stretching a non-stretched PET sheet or film about 2.5 to 5 times each in so-called biaxial directions of a longitudinal direction and a width direction. It indicates an orientation pattern.

When the PET film has been subjected to a surface treatment by a known method, that is, a film subjected to a corona discharge treatment (in air, nitrogen, carbon dioxide gas or the like) or an easy adhesion treatment, a receiving layer or a transfer type ink layer is used. It can be more preferably used because the adhesion to water, water resistance, solvent resistance and the like are improved. Various methods known in the art can be used for the easy adhesion treatment.Acrylic-based, urethane-based and polyester-based various easy-adhesives are applied in the film manufacturing process, or the film after uniaxial or biaxial stretching is applied to the film. Those coated with various types of easy-to-adhesive agents such as described above can be suitably used.

[0010] The thickness of the PET film as the film support is not particularly limited, and an appropriate thickness can be set in a range of about 1 to 500 µm, for example, depending on the stiffness required for the recording sheet.

The surface roughness, haze and the like of the film support are not particularly limited, and the adhesive strength required between the receiving layer or the transfer type ink layer described below and the film support, and the recording sheet required. The desired value may be appropriately set in consideration of the transparency, whiteness, and the like to be performed.

The heat shrinkage at 150 ° C. of the PET film support is less than 2%. By keeping the heat shrinkage of the film support low as described above, sufficient adhesion between the film support and the receiving layer or the transfer ink layer can be obtained even when a temperature change occurs.

In the present invention, the specific gravity of the film support is 1.2 or less, preferably 1.0 or less.
Since the film support is made of a PET film, a special device as described below, for example, is required to keep the specific gravity at 1.2 or less.

First, there is a method of dispersing and mixing an immiscible polymer in a PET film. When PET and an incompatible polymer are dispersed and mixed in the form of particles, especially when the PET is stretched into a film, voids are formed around the incompatible polymer, and the specific gravity is suppressed by that amount. Whitened by numerous voids. The PET film thus obtained as a film support has a lower specific gravity than ordinary PET films, and also has excellent whiteness and cushioning properties. The shape factor in the film of the incompatible polymer to be dispersed and mixed is 1 to
It is preferably 4. The average equivalent spherical diameter of voids in the film formed of the incompatible polymer is 1
It is preferably from 10 μm to 10 μm.

The immiscible polymer is not particularly limited as long as it is a polymer incompatible with PET, but is preferably a methylbutene polymer, a methylpentene polymer, a styrene-based polymer, a fluorine-based polymer, a cellulose acetate, a cellulose acetate. A polymer having a melting point of 200 ° C. or higher selected from pionate polymers.

Further, in order to keep the specific gravity of the film support low, the PET film is mixed with the above-mentioned incompatible polymer dispersion or separately from the dispersion and mixing of the incompatible polymer for the purpose of lowering the specific gravity only. It is also effective to include a low specific gravity agent. The low specific gravity agent is a compound that is added to PET and has the effect of reducing the specific gravity,
The effect is observed only for specific compounds. For example, the low specific gravity agent can be selected from polyalkylene glycols, ethylene oxide / propylene oxide copolymers, alkylbenzene sulfonates, alkyl sulfonates, modified products thereof, and copolymers of these and polyesters.

In the recording sheet of the present invention, a transfer type ink layer is provided on the surface of the film support opposite to the receiving layer. Various transfer inks have been proposed,
Representative examples include an ultraviolet curable type and a hot melt type, and the hot melt type is suitable for the present invention in terms of price and the like.

The hot melt ink is heated and melted or heated to a constant temperature on a printing machine until printing is applied to a material to be printed, maintaining printability such as fluidity, and cooling or cooling after printing. The hot melt ink used in the recording sheet of the present invention is not particularly limited, and a known heat-type copying carbon ink, a transfer-type heat-sensitive ink, and a hot-melt ink may be used. Melt type glass ink or the like can be used. In the case of slips, the transfer type thermal ink is suitable when carbon ink is transferred and recorded by a thermal head using a computer or a personal computer. The method for forming the hot melt ink layer is not particularly limited, and a known method can be used.
The ink layer is provided on the entire surface or on a predetermined location.

The receiving layer of the present invention is a layer containing or comprising a polymer binder and a white opaque pigment.
The layer as the main component refers to a layer which is 30% by weight or more in the receiving layer, and other substances may be appropriately added.
In the present invention, such a receiving layer is provided on one surface of the film support.

The polymer binder used in the present invention is selected from a thermoplastic resin or a curable resin, and is a resin which is soluble in a known organic solvent and has a small amount of a hydrophilic group or a hydrophilic component. It is preferable in terms of water resistance and moisture resistance of the receiving layer. Specific examples include thermoplastic resins such as polyester, polyamide, polyesteramide, polyvinyl acetal, polyvinyl chloride, poly (meth) acrylate, polyimide, polyurethane, and polycarbonate.
Polystyrene, polymethylpentene, polyolefin,
Examples include halogenated polyolefins, alkyd resins, polyamideimides, silicon resins, fluororesins, and the like, and copolymers and mixtures thereof. Further, as a curable resin that is cured by light, heat, oxygen, etc., for example, a phenol resin,
Melamine resins, epoxy resins, crosslinked organosilicon resins and the like can be mentioned. In the present invention, it is preferable to use a thermosetting resin from the viewpoint of water resistance, solvent resistance, heat resistance, abrasion resistance, mechanical strength, etc. of the receiving layer, and more preferably, a crosslinkable resin can be measured by using a well-known crosslinking agent. preferable.

Further, in the present invention, among the above-mentioned polymer binders, urethane resins and acrylic copolymer resins are preferably used, and most preferred are acrylic copolymer resins, and among them, poly (meth) acrylate copolymer copolymers are particularly preferred. It is united.
The poly (meth) acrylate copolymer is a poly (meth) acrylate copolymer containing a reactive monomer. As such a reactive monomer, as a functional group, for example, a carboxyl group (for example, (Meth) acrylic acid, etc.), hydroxyl group (such as 2-hydroxyethyl (meth) acrylate), amide group (such as (meth) acrylamide), glycidyl group (such as glycidyl (meth) acrylate), amino group (( (Meth) 2-ethylaminoethyl acrylate) and the like.

The acrylic copolymer resin having a hydroxyl group of 40 or more, preferably 45 or more, has properties such as adhesion to a film support, coating film forming property, and easy adhesion to ink and toner. preferable. The hydroxyl value in the present invention is defined as follows. That is, it is the number of mg of potassium hydroxide corresponding to the number of moles of the hydroxyl group contained in 1 g of the sample.

Examples of the organic solvent for the thermosetting resin include well-known alcohols, carboxylate esters, ketones, aliphatic hydrocarbons, alicyclic or aromatic hydrocarbons, and mixtures thereof. It is preferable to select one that does not adversely affect the applicability and the like.

The white hidden pay pigment referred to in the present invention is an inorganic or organic pigment which exhibits a white receiving layer. Examples of the inorganic pigment include zinc carbonate, zinc oxide, zinc sulfide, and the like.
Talc, carion, heavy / light or synthetic calcium carbonate, titanium oxide, silica, lithium fluoride, calcium fluoride, barium sulfate, alumina, zirconia, calcium phosphate, natural or synthetic swelling or non-swelling mica, etc. Examples of the organic pigment include, for example, polystyrene, polymethylstyrene, polymethoxystyrene, polyvinyl chloride, polyethylene, polypropylene, polyvinylidene chloride, polymethacrylate, polymethylmethacrylate, polychloroacrylate, and styrene-divinylbenzene copolymer. , Melamine resin, epoxy resin, phenolic resin, fluorine resin and the like,
At least one selected from these is applied, but is not particularly limited. The pigment may be in a hollow porous or non-hollow porous state. Further, the pigment may be subjected to a treatment such as adding a functional group such as glycidyl or methylol group to the surface in order to improve dispersibility in the resin.

The average particle size of the white hidden pay pigment is 0.1 to 25.
μm, preferably in the range of 1.0 to 10 μm, is preferred in terms of handleability, coatability and the like. Further, the content of the white hidden pay pigment in the receiving layer is preferably 0.1 to 70% by weight, more preferably 5 to 50% by weight. Content is 0.
When the amount is less than 1% by weight, the white concealing payability is sufficient, and when the amount is 70% by weight or more, the adhesion between the receiving layer and the film substrate is liable to decrease.

In the present invention, the adhesiveness of the receiving layer, the solvent resistance,
In order to further improve the heat resistance, it is preferable that the receiving layer contains a crosslinking agent.

The cross-linking agent referred to in the present invention means a cross-linking reaction with a functional group, for example, a hydroxyl group, a carboxyl group, a glycidyl group, an amide group, etc., present in the polymer binder, and finally a three-dimensional network structure. A cross-linking agent for forming a receiving layer having, as typical examples, methylolated or alkylolated urea-based, melamine-based, acrylamide-based, polyamide-based resins, and epoxy compounds, isocyanate compounds, and aziridine compounds. it can.
In the present invention, among these, application of an isocyanate compound is preferred from the viewpoint of adhesion to a film support, crosslinkability, and the like.

These crosslinking agents may be used alone or in combination of two or more in some cases. The amount of the cross-linking agent to be added is appropriately selected depending on the type of the cross-linking agent, but is usually preferably 0.01 to 50 parts by weight, more preferably 0.1 to 30 parts by weight, based on 100 parts by weight of the solid content of the polymer binder. Is more preferred. Further, it is more preferable to use a crosslinking catalyst in combination with the crosslinking binder because crosslinking proceeds more. Salts, inorganic substances,
Known substances such as an organic substance, an acid substance, and an alkali substance can be used. The amount of the crosslinking catalyst to be added is 0.001 to 10 parts by weight based on 100 parts by weight of the solid content of the polymer binder,
Preferably it is 0.1 to 5 parts by weight. After the polymer binder containing the crosslinking agent is applied to the film support, heating, ultraviolet light,
Crosslinking is carried out by an electron beam or the like, but a method by heating is generally used.

Further, in the present invention, the surface electric resistance of the receiving layer is preferably from 10 ⁷ to 10 ¹³ Ω / □, and more preferably from 10 ⁸ to 10 ¹¹ Ω / □. If the surface electric resistance is lower than the above range, the transfer efficiency of the toner is poor,
On the other hand, if it is higher than the above range, undesirably, toner transfer unevenness and toner contamination may occur, or a feeding error or running failure due to charging may occur.

In order to achieve the surface electric resistance of the receiving layer, it is preferable that the receiving layer contains a polymer electrolyte and / or a conductive powder. Examples of the polymer electrolyte include a quaternary ammonium salt or other such a chaoline-based polymer, a nonionic polymer such as poval, polyethylene glycol, or an alkylamine; an anionic polymer having an anionic polar group such as a carboxylic acid or a sulfonic acid; And the like. Examples of the conductive powder include tin oxide, indium oxide, zinc oxide, tantalum oxide, and a combination thereof. Among them, a quaternary ammonium salt-based cation polymer is effectively used from the viewpoints of conductivity and compatibility with a polymer binder, and among the quaternary ammonium salts and the like, a cation-based acrylic polymer is preferable. used.

Further, in the present invention, the JIS of the receiving layer described later is used.
It is desirable that the whiteness determined according to -L-1015 is 40% or more, preferably 60% or more. If the whiteness is less than 40%, the hidden payability becomes insufficient, and the resolution and sharpness of the type and the like on the surface of the receiving layer are reduced, and reading errors such as in the case of a bar code are liable to occur. The thickness of the receiving layer is not particularly limited, but is preferably 0.5 to 50 μm, and is preferably 1.0 to 2 μm.
Those having a range of 0 μm are desirable in terms of uniformity of formation of the receiving layer, adhesion and the like. In addition, if necessary, known additives such as an antifoaming agent, a coating improver, a thickener, an antistatic agent, an ultraviolet absorber, and a dye may be added to the receiving layer in an amount that does not impair the effects of the present invention. May be contained.

The receiving layer can be formed by any known method such as a gravure coating method, a reverse coating method, a bar coating method, and a kiss coating method.

Further, in the recording sheet of the present invention, a metal vapor-deposited layer may be provided on at least one side of the film support depending on the use (for example, when light-shielding properties and moisture-proof properties are required). The metal vapor deposition layer is a known vacuum vapor deposition method, such as vapor deposition, sputtering, low melting point metal such as aluminum, zinc, copper, and tin, its oxide, its nitride, or an alloy containing them, Is a layer formed by attaching a metal such as iron, nickel, cobalt, or titanium, or an alloy containing the same to the surface of the base PET film. Further, the metal deposition layer may be in the form of a composite layer of different metals, or may be a metal oxide layer formed by a so-called reactive deposition method. The thickness of the metal vapor deposition layer is not particularly limited, but is not limited to 0.1.
The range is preferably about 001 to 0.2 μm, more preferably 0.005 to 0.1 μm. When gas barrier properties such as light-shielding properties, moisture proofing, and fragrance retention are required, it is preferable that the metal deposition thickness satisfy the required properties.

[0034]

According to the recording sheet of the present invention, a receptor layer containing a polymer binder and a white hidden pigment is formed on a film support having a small heat shrinkage and a low specific gravity. Such excellent effects as described above could be obtained.

First, in the recording sheet of the present invention, the thermal shrinkage of the film support is suppressed to a low level, so that the thermal dimensional stability is excellent and the excellent adhesion to the receptor layer can be achieved.

The recording sheet of the present invention has a small specific gravity of the film support of 1.2 or less, and is excellent in cushioning property and thermal dimensional stability. Excellent in nature.

In the recording sheet of the present invention, the whiteness of the film support can be increased by adding an incompatible polymer and a low specific gravity agent to the polyester of the film support, so that printed characters and the like can be identified. Easy and can give a high quality image.

The receiving layer of the recording sheet is made of a UV-curable ink, an electron beam-curable ink, an oil-based ink, a thermal transfer ink ribbon, an electrophotographic toner, and other various inks. Excels in writing with a pencil.

Further, the recording sheet has both excellent adhesion and excellent antistatic properties, and since the excellent antistatic effect can be maintained as it is, there is no adhesion of dust and the like, and the printability is improved. Are better.

Since the recording sheet of the present invention has the above-mentioned excellent characteristics, it can be applied to various uses where copying and recording is required, but is particularly suitable for slips for business use and home delivery service. .

[Measurement and Evaluation Methods] The characteristic values of the present invention are based on the following measurement methods and evaluation criteria. (1) Surface Roughness According to JIS-B0601-1976, the cutoff is 0.
25 mm, measurement length 4 mm, center line average roughness Ra (μm)
And the maximum roughness Rt (μm).

(2) The average equivalent spherical diameter of voids in a film formed of an incompatible polymer The cross section of the film cut in the machine direction or its vertical direction in the film forming process is 1000 to 5000 times with a scanning electron microscope.
A photograph that is twice as large is taken, and at least 100 or more voids in a specified thickness range are applied to an image analyzer to obtain a distribution of diameters of circles corresponding to void areas.
The volume average diameter of this distribution is defined as the average sphere equivalent diameter of the voids.

(3) Specific gravity 25 using a carbon tetrachloride-n-heptane-based density gradient tube.
Use the value at ° C.

(4) Heat Shrinkage Film is 10 mm wide and 300 mm long in the longitudinal or width direction.
After cutting into mm, marking at intervals of 200 mm and fixing to a support plate under constant tension (5 g), the original length a (mm) of the marking interval is measured. Next, a load is applied by using a 3 g clip, and processing is performed for 30 minutes while rotating in a hot air oven at 150 ° C., and the marking interval b (mm) is measured in the same manner as the original length measurement. The heat shrinkage is determined by the following equation, and the average value of five pieces is used. Heat shrinkage (%) = (ab) / a

(5) Optical Density The transmission density is measured using an optical densitometer (TR927, manufactured by Macbeth). The film thickness and the optical density are plotted, and the optical density corresponding to each thickness is determined.

(6) Whiteness According to JIS-L-1015, U-manufactured by Shimadzu Corporation
When the reflectance at wavelengths of 450 nm and 550 nm is B% and G% using V-260, whiteness (%) = 4B-3G.

(7) Stretchability When a film is continuously formed for 24 hours, a film having no film breakage is regarded as "good", and a film having two or more breaks is regarded as "breakage".

(8) Cushion rate (%) Dial gauge NO. 2109-10
The standard gauge head 900030 is used for the dial gauge stand NO. The thickness is obtained from the film thicknesses d ₅₀ and d ₅₀₀ when a load of 50 g and a load of 500 g are applied to the dial gauge holding portion using 7001DGS-M according to the following equation. Cushion factor = _{[(d 50 -d 500) / d} 50 ] × 100

(9) Shape Factor In the same manner as when determining the average diameter of voids, the shape of the immiscible polymer in the cross section of the film is subjected to an image analyzer and expressed as a ratio of 100 average major axis / minor axis.

(10) Adhesion of Receptive Layer The adhesiveness of the receiving layer / support was measured by inserting a cross cut (100 pcs / cm ² ) on the receiving layer and setting the cellophane tape: CT-45 ° at 45 ° to the cross cut surface. 24 (Nichiban Co., Ltd.)
Was adhered and pressed back and forth 5 times with a load of 2 kg using a hand roller, and then the cellophane tape was forcibly peeled in the 180 ° direction, and the degree of peeling of the receiving layer was observed and evaluated. Judging criteria: ◎: very good (peeling area 0%), 、: good (less than 5% peeling), Δ: slightly poor (peeling area 5% or more 20)
%), X: defective (peeling area 20% or more).

(11) Easy Adhesion UV ink (FDO manufactured by Toyo Ink Co., Ltd.)
(Black)) is applied to a film thickness of about 5 μm, and a UV lamp 120 W
After curing for 24 hours after irradiation and curing at 6 m / min (height: 150 mm) with 2 lamps / cm × 2 lamps, a cellophane tape was stuck on the UV ink layer, and evaluation was made by the same method as in the above (10).

(12) Surface electric resistance 20 ° C., 65% RH using a digital ultra-high resistance / micro ammeter (type R8340) manufactured by Advantest Corporation
Was measured.

(13) Charging Property After the receiving layer was charged at a discharge voltage of 10 KV using a static honest meter type S-4104 (manufactured by Shishido Shokai), the charge decay at 20 ° C. and 60% RH was reduced by half (second). It was evaluated and determined as follows. ：: good (1 second or less), Δ: slightly poor (2 to 30 seconds), ×: bad (30
Seconds).

(14) Image Characteristics A copy test was performed using an electrostatic copying machine (type 5055) manufactured by Fuji Xerox Co., Ltd. Image characteristics were evaluated with the naked eye, and the following judgment was made. ：: The image is clear. Δ: Image lacks sharpness slightly. ×: The image is unclear or has a low density, or toner is scattered or stained.

[0054]

The present invention will be described with reference to the following examples and comparative examples, but the present invention is not limited to these examples. Example 1 Polyethylene terephthalate (intrinsic viscosity [η] = 0.6
A raw material obtained by mixing 5% by weight of 5), 5% by weight of poly-4-methylpentene-1 (TPX-D820, Mitsui Petrochemical Co., Ltd.) and 1% by weight of polyethylene glycol having a molecular weight of 4000 was supplied to an extruder A, It was melted at 285 ° C. by a conventional method and introduced into the center layer of the T-die three-layer composite die.

On the other hand, the polyethylene terephthalate 9
0% by weight of calcium carbonate (average particle size 0.8 μm)
The raw material to which 4% by weight was added was supplied to the extruder B, melted at 285 ° C. by a conventional method, laminated on both surface layers of the T-die three-layer composite die, and the melt sheet was kept at a surface temperature of 25 ° C. It was closely cooled and solidified on a cooling drum by an electrostatic charge method. Subsequently, the cast sheet was stretched 3.5 times using a group of rolls heated to 98 ° C. in the longitudinal direction according to a conventional method, and cooled to 25 ° C. Further, the stretched film is guided to a tenter and
The film was stretched 3.2 times in the width direction in an atmosphere heated to 25 ° C., heat-set at 225 ° C., and a film having a thickness of 50 μm was obtained. The thickness of each film layer was 3 μm for the surface layer and 44 μm for the central layer.

Both surfaces of the biaxially stretched film were subjected to corona discharge treatment, and one surface was treated with toluene / methyl ethyl ketone (mixing ratio: 1: 1) as a diluting solvent. -Type acrylic resin “KOTAX” LH613 (manufactured by Toray Industries, Inc.) and 20 parts by weight of silicon oxide having an average particle size of 1.0 μm as a white hidden pay pigment based on the resin solid content, and titanium oxide having an average particle size of 0.3 μm Of a uniform dispersion coating material having a concentration of 25% by weight to which 10 parts by weight was added, and the coated layer was dried at 120 ° C. for 1 minute to have a thickness of 3.
A 0 μm receiving layer was provided.

Next, the thus obtained film was added to 125
After setting on a hot plate set at ± 5 ° C, the hot melt ink “HTS” manufactured by Teikoku Ink Co., Ltd.
66S "rubber convex black is applied by a bar method, and the ink layer 5.0
A recording sheet having a thickness of μm was prepared. The characteristics of the recording sheet are as shown in Tables 1 and 4, and it can be seen that the recording sheet is a film having excellent thermal stability, low cushioning properties and high whiteness and a low specific gravity. The receiving layer was also excellent in each property.

[0058]

[Table 1]

Comparative Examples 1 and 2 The procedure was the same as in Example 1 except that the incompatible polymer poly-4-methylpentene-1 used in Example 1 was replaced with polypropylene (Noblen 4H manufactured by Mitsui Toatsu Co., Ltd.). The case was referred to as Comparative Example 1, and the case where the heat treatment in Comparative Example 1 was not performed was referred to as Comparative Example 2. Tables 2 and 4 show the properties of the obtained films. Thus, it can be seen that when polypropylene is used, a low specific gravity film having excellent dimensional stability cannot be obtained.

[0060]

[Table 2]

Examples 2 and 3 and Comparative Example 3 Recording sheets were obtained in the same manner as in Example 1 except that the amount of the low specific gravity polyethylene glycol (PEG) used in Example 1 was changed. Tables 3 and 4 show the properties of the obtained films. It can be seen that a film having a low specific gravity and excellent thermal dimensional stability can be obtained by the addition amount of the low specific gravity agent polyethylene glycol.

[0062]

[Table 3]

Example 4 Based on Example 1, a polymer binder "Cotax" LH613 (manufactured by Toray Industries, Inc.) was used as a coating material for the receiving layer, and a cationic polymer "Elecond" PQ-50 was used as a polymer electrolyte.
B (manufactured by Soken Chemical Co., Ltd.) at a solid content weight ratio of 1: 1, and a mixture prepared by adding a white hidden pay pigment to the total solid content in the same manner as in Example 1 was used. A recording sheet was obtained in the same manner as in Example 1. As shown in Table 4, it can be seen that the recording sheet is excellent in each property.

Example 5 Based on Example 4, "Cotax" LH681 (manufactured by Toray Industries, Inc.) having a hydroxyl value of 50 and urethane resin "Nipporan" 3022 (manufactured by Nippon Polyurethane Co., Ltd.) having a hydroxyl value of 50 were used as polymer binders. A recording sheet was prepared in the same manner as in Example 4, except that a mixture having a solid content ratio of 1: 1 was used.
As shown in Table 4, the properties of the recording sheet were excellent in each property.

Example 6 In the coating material of Example 5, an isocyanate sheet compound "Sumidule" N-75 (Sumitomo Bayer K.K.) was used as a cross-linking agent for the solid content of the polymer binder of the coating material. Was obtained in the same manner as in Example 5, except that 20 parts by weight of the recording sheet was added. As shown in Table 4, the recording sheet was excellent in the balance of each property.

Example 7 Aluminum was vacuum-deposited on the biaxially stretched polyester film obtained in Example 1 to a thickness of about 0.06 μm at a pressure of 10 ⁻⁴ Torr using a roll-up type vacuum evaporator. Next, the coating material of Example 6 was applied to the non-deposited surface of the film in the same manner as in Example 6, and the transfer type ink layer of Example 1 was applied to the deposited surface of Example 1.
A recording sheet was prepared in the same manner as described above. The recording sheet had a gloss characteristic of a vapor-deposited film and, as shown in Table 4, had excellent properties.

[0067]

[Table 4]

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-23787 (JP, A) JP-A-62-85984 (JP, A) JP-A-63-31785 (JP, A) JP-A-63-1983 207682 (JP, A) JP-A-3-197170 (JP, A) JP-A-1-297170 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41M 5/00 B41M 5 /Ten

Claims (9)

(57) [Claims] 1. A recording sheet comprising a receiving layer / a film support / a transfer type ink layer, wherein the film support is 15
A recording sheet comprising a polyester film having a heat shrinkage at 0 ° C. of less than 2% and a specific gravity of 1.2 or less, wherein the receiving layer comprises a layer containing a polymer binder and a white hidden pay pigment. . 2. The receiving layer contains a polymer electrolyte and / or a conductive powder, and the surface of the receiving layer has an electric resistance of 10
^2. The recording sheet according to claim 1, wherein the recording sheet has a resistivity of ⁷ to 10 ¹³ Ω / □. 3. The recording sheet according to claim 1, wherein the polymer binder is an acrylic copolymer resin having a hydroxyl value of 40 or more. 4. The recording sheet according to claim 1, wherein the receiving layer is cross-linked with an isocyanate compound. 5. The recording sheet according to claim 1, wherein an immiscible polymer is dispersed and mixed in the polyester film, and the shape factor of the immiscible polymer in the film is from 1 to 4. . 6. The incompatible polymer is a methylbutene polymer, a methylpentene polymer, a styrene-based polymer,
6. The recording sheet according to claim 5, wherein the recording sheet is a polymer having a melting point of 200 ° C. or higher selected from a fluoropolymer, a cellulose acetate, and a cellulose propionate polymer. 7. The recording sheet according to claim 1, wherein the polyester film is obtained by adding a low specific gravity agent to polyester. 8. The low specific gravity agent is selected from polyalkylene glycols, ethylene oxide / propylene oxide copolymers, alkylbenzene sulfonates, alkyl sulfonates, modified products thereof, and copolymers of these and polyesters. The recording sheet according to claim 7, which is a recording sheet. 9. The recording sheet according to claim 1, wherein the film support has a metal deposition layer on at least one side.