JPH06191170A - Thermal transfer ink ribbon substrate and thermal transfer ink ribbon with said substrate - Google Patents

Abstract

PURPOSE:To provide a thermal transfer ink ribbon with thin substrate and ink, layer in thickness. CONSTITUTION:A thermal transfer ink ribbon obtained by applying 1.5-2.5g/m<2> of hot melt ink on one surface of a film, which is made of a polyester resin having an average molecular weight of 12X10<3>-30X10<3> to have a thickness of 1.5-3.0mum and a heat shrinkage coefficient not more than 3% longitudinally and not more than 2% crosswise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base material for a thermal transfer ink ribbon and a thermal transfer ink ribbon using the base material.

[0002]

2. Description of the Related Art Conventionally, a thermal transfer ink ribbon having a structure in which a hot melt ink is applied to one surface of a substrate such as a polyethylene terephthalate film has been widely used.

Recently, there has been a demand for thinning this kind of thermal transfer ink ribbon. This is because thinning has the following advantages.

(1) Printing energy can be reduced. Reducing printing energy is advantageous because it prolongs battery life, especially when the printer is running on battery power.

(2) Since the pulse width of the electric signal applied to heat the heating element of the thermal head can be narrowed, the printing speed can be increased.

(3) Since the base material is thin and the heat energy applied to the base material from the heating element is reduced in heat diffusion in the base material, high definition printing is achieved.

(4) The ribbon can be made longer in the ribbon winding body (pancake). Also, if the length of the ribbon is constant, the ribbon winding body can be made smaller, making the cassette smaller,
As a result, the size of the printer can be reduced.

In view of the above points, the present inventors have tried to thin the base material and the ink layer in order to thin the thermal transfer ink ribbon, and have found that the following problems occur.

Problems due to the thinness of the A base material (1) The ribbon is liable to break during manufacturing and printing. In particular, when pits (hollows) or through holes are formed in the heated portion of the substrate during printing, the strength is reduced and the material is easily broken.

(2) When the ribbon is manufactured and printed, the running property of the ribbon is poor and wrinkles easily occur on the ribbon. In addition, the ribbon easily skews, causing ribbon breakage in the cassette.

Problems Caused by Thin B Ink Layer (1) When printing on paper with poor surface smoothness (hereinafter referred to as rough paper), voids occur in the printed image. In the ink ribbon for rough paper, the content of the resin in the ink vehicle is increased to increase the cohesive force of the ink layer, and the ink layer is transferred so as to bridge the concave portion of the rough paper. At that time, if the ink layer is thin, it is difficult to secure the crosslinkability of the ink layer, and thus voids occur.

(2) The print density is reduced.

(3) The ribbon is usually used as a ribbon roll (pancake), and in this ribbon roll, the phenomenon in which the front surface of the ink layer and the back surface of the substrate stick together is blocking. In order to prevent this blocking, particles are generally added to the ink layer. The size of the particles used must be smaller than the thickness of the ink layer (if it is large, the unevenness of the surface of the ink layer becomes severe and the transferability of the ink deteriorates), but the size of the particles that have an antiblocking effect is usually Since the thickness is 2 μm or more, if the ink layer is thin, particles for preventing blocking cannot be added.

It is an object of the present invention to provide a thin thermal transfer ink ribbon which solves the above problems when thinning the substrate and the ink layer of the thermal transfer ink ribbon.

[0015]

The present invention has an average molecular weight of 12
A thermal transfer ink comprising a polyester resin of × 10 ³ to 30 × 10 ³ , a thickness of 1.5 to 3.0 μm, and a heat shrinkage ratio of 3% or less in the longitudinal direction and 2% or less in the lateral direction. The present invention relates to a ribbon base material (hereinafter referred to as a first invention).

Further, the present invention relates to a substrate for a thermal transfer ink ribbon (referred to as a first embodiment of the first invention) in which the dynamic friction coefficient of the film is 0.6 or less.

The present invention further provides that the film has an average particle size.
The present invention relates to a base material for a thermal transfer ink ribbon (referred to as a second embodiment of the first invention) containing particles of 0.1 to 5 μm in an amount of 1 to 30% by weight.

Further, the present invention relates to a thermal transfer ink ribbon (hereinafter referred to as a second invention) in which a heat-meltable ink is applied on one surface of the substrate at a coating amount of 1.5 to 2.5 g / m ² .

The present invention further provides a thermal transfer ink in which the heat-meltable vehicle in the heat-meltable ink is mainly composed of the heat-meltable resin, and contains 30% by weight or more of the heat-meltable resin having a melt flow rate of 1200 g / 10 min or less. Ribbon (hereinafter,
The first embodiment of the second invention).

The present invention further relates to a thermal transfer ink ribbon (hereinafter, referred to as a second embodiment of the second invention) in which the content of the coloring pigment in the hot melt ink is 20 to 60% by weight.

[0021]

[Operation and Example] In the present invention, the thickness of the substrate is 1.
5 to 3.0 μm, coating amount of hot-melt ink is 1.5 to 2.5 g
/ M ² , the thermal transfer ink ribbon can be made thin (for example, the total ribbon thickness is 3.0 to 5.5 μm).

Further, in the present invention, the above-mentioned problems in thinning the base material and the ink layer are solved as follows.

Solution of problems caused by thin base material (1) Since a polyester resin film having a large average molecular weight of 12 × 10 ³ to 30 × 10 ³ is used as a base material, strength is obtained even if it is thin. Is large, so that it is less likely to break during ribbon production and printing.

Further, since the molecular weight is large, the heat resistance is high, and pits and holes are unlikely to occur in the heating portion during printing. Further, since the heat shrinkage rate is small, even if pits or holes are formed, they do not spread widely and the substrate does not break.

By mixing particles into the film (first embodiment of the first invention), the strength and heat resistance of the film are further improved and the film is less likely to break.

(2) By incorporating particles into the film (first embodiment of the first invention), the dynamic friction coefficient is reduced, the ribbon running property is good, and wrinkles and ribbon breakage do not occur. . Further, it also has an antiblocking effect.

Solving the problems caused by the thin B ink layer (1) The vehicle in the heat-meltable ink is mainly composed of the heat-meltable resin and has a melt flow rate of 1200 g / 10 mi.
By containing 30% by weight or more of n or less of the heat-meltable resin (the first embodiment of the second invention), the cohesive force of the heat-meltable ink layer is increased and the generation of voids is prevented.

(2) Since the content of the color pigment in the heat-meltable ink is as high as 20 to 60% by weight (second embodiment of the second invention), the printing density is high even if the ink layer is thin.

(3) The content of the color pigment in the heat-meltable ink is as high as 20 to 60% by weight, and it has been found that such a content of the color pigment also acts as an antiblocking agent. It was Therefore, blocking can be prevented without separately using particles as an antiblocking agent.

The present invention will be specifically described below.

The base material for the thermal transfer ink ribbon of the present invention has an average molecular weight (referred to as a number average molecular weight; the same applies hereinafter) of 12 × 10 ³ to
Made of 30 × 10 ³ polyester resin, thickness 1.5 ~
Heat shrinkage (JIS C2318, 150 ° C x 2) at 3.0 μm
The time is 3% or less in the longitudinal direction and 2% or less in the lateral direction.

As the polyester resin, polyethylene terephthalate (PET), polyethylene naphthalate (PEN) having an average molecular weight of 12 × 10 ³ to 30 × 10 ³ , and the following general formula:

[0033]

[Chemical 1]

(Wherein R is a hydrogen atom or a lower alkyl group such as methyl, and X is

[0035]

[Chemical 2]

## EQU3 ## In particular, the following formula:

[0037]

[Chemical 3]

Polyarylate (PAR), polybutylene terephthalate (PBT) and the like shown in can be used, but polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are particularly preferably used.

The average molecular weight of the polyester resin is 12 × 10
^{If it is} less than ³ , the film is inferior in strength and heat resistance, and especially at the time of ribbon production or printing, perforations are generated in the heating part, which is apt to break, which is not preferable. Average molecular weight is
When it is larger than 30 × 10 ³ , it is difficult to form a thin film and it becomes difficult to obtain a thin film having a stable thickness.

If the film thickness is greater than 3.0 μm,
The intended purpose of thinning the ink ribbon of the present invention is not achieved. On the other hand, if the thickness of the film is less than 1.5 μm, the strength is reduced, which is not preferable.

When the heat shrinkage ratio of the film is more than 3% in the longitudinal direction and more than 2% in the lateral direction, the film is easily broken when pits or holes are generated by heating of the thermal head during printing, which is preferable. Absent.

The polyester resin film is usually a biaxially stretched film, and the stretching ratio is 2.5 to 5 times in the machine direction.
It is about 3 to 5 times in the lateral direction.

It is preferable that particles are contained in the polyester resin film so that the strength is further improved and the dynamic friction coefficient (ASTM D-1894E method) is 0.6 or less.

As such particles, inorganic particles such as calcium carbonate, silica, kaolin and talc can be used. The average particle size of the particles is preferably in the range of 0.1 to 5 μm, and the content of the particles is preferably in the range of 1 to 30% by weight.

When the average particle size of the particles is smaller than the above range,
The effect of reducing the dynamic friction coefficient is small, and the front and back surfaces of the film tend to be blocked by the winding roll after coating. When the average particle size of the particles is larger than the above range, the printing function of the thermal transfer ink ribbon is deteriorated. If the content of the particles is smaller than the above range, the effect of improving the strength and the effect of reducing the dynamic friction coefficient are insufficient. When the content of particles is higher than the above range, the physical properties of the film are deteriorated and the printing performance is deteriorated.

On the back surface of the film (the surface on the side which comes into sliding contact with the heating head), a stick prevention layer for preventing the sticking phenomenon in which the heating head is fused to the film may be provided. Examples of the material for the stick preventing layer include heat-resistant resins such as silicone resins, fluororesins, and nitrocellulose resins, resins modified with these resins (for example, silicone-modified polyurethane resins), and resins such as those mentioned above. Examples include those mixed with a lubricant. From the viewpoint of reducing the thickness of the entire substrate, the stick prevention layer should be as thin as possible so that it can exhibit its function, and for example, it is preferably about 0.01 to 0.5 μm.

The above-mentioned base material for the thermal transfer ink ribbon is a thermal transfer ink ribbon of various types [for example, a one-time heat-meltable ink layer is formed on one surface of the base material, heat-melting property of multiple times transferability on one surface of the base material] An ink layer (an ink layer that gradually transfers in the thickness direction of the ink layer each time it is heated) is formed, and a non-transferable porous layer containing a heat-meltable ink is formed on one surface of a substrate. , A non-transferable resin layer containing a heat transferable (for example, heat sublimation) dye is formed on one side of a substrate], but a heat-meltable ink is formed on the substrate. Apply 1.5 to 2.5 g / m ² (dry coating amount, the same applies below) to obtain a total thickness of 3.0 to 5.5.
In the case of a one-time thermal transfer ink ribbon of μm, its excellent effect is remarkably exhibited.

As the heat-meltable ink, any composition having a conventionally-used heat-meltable vehicle and a colorant can be used. However, the above-mentioned problems when thinning the ink layer are involved. From the viewpoint of solving, a composition having a composition in which the heat-meltable vehicle is mainly composed of the heat-meltable resin, and the melt flow rate (JIS K7210) is 30% by weight or more of the heat-meltable resin of 1200 g / 10 min or less, Further, it is preferable that the melt flow rate of the entire vehicle is 50 to 2500 g / 10 min. If the melt flow rate of the vehicle is less than the above range, the cohesive force of the ink is small and voids are likely to occur. On the other hand, if the melt flow rate is above the above range, the thermal transfer sensitivity is lowered and the image is easily scratched. If the ratio of the heat-meltable resin having the specific melt flow rate is less than the above range, it is difficult to adjust the melt flow rate of the vehicle to the above range, and voids are likely to occur. The proportion of the entire heat-meltable resin in the vehicle is preferably 30% by weight or more, and if the content is less than this, the cohesive force of the ink decreases.

Examples of the heat-meltable resin include ethylene-vinyl acetate copolymer, ethylene-vinyl butyrate copolymer, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic acid alkyl ester copolymer. Combined (as the alkyl group, methyl, ethyl, propyl, butyl,
Hexyl, heptyl, octyl, 2-ethylhexyl,
Nonyl, dodecyl, hexadecyl and the like having 1 to 16 carbon atoms), ethylene-acrylonitrile copolymer, ethylene-acrylamide copolymer, ethylene-N-methyl roll acrylamide copolymer, ethylene-styrene copolymer Ethylene-based copolymers such as polymers; poly (meth) acrylic acid esters such as polylauryl methacrylate and polyhexyl acrylate; polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl alcohol copolymer, etc. Polyvinyl chloride (co) polymer; polyester resin such as sebacic acid-decanediol polymer, azelaic acid-dodecanediol polymer, azelaic acid-hexadecanediol polymer; one or more of polyamide resins and the like can be used. .

The melt flow rate is 1200 g / 10 min
As the following heat-meltable resin, among the heat-meltable resins exemplified above, those having a melt flow rate of 1200 g / 10 min or less can be used, and an ethylene-vinyl acetate copolymer is particularly preferable.

As the vehicle, a wax-like substance may be used in addition to the heat-meltable resin within the range that the melt flow rate of the entire vehicle is 50 to 2500 g / 10 min.

In the present invention, from the viewpoint of improving the transferability of the ink layer, it is preferable to add a tackifier resin to the vehicle. By adding a tackifier resin, the viscosity of the ink is not significantly affected,
The adhesiveness to the receiving paper can be improved and the transferability can be improved.

Examples of such tackifier resins include natural tackifier resins such as hydrogenated rosins, asymmetric asymmetric rosins, polymerized rosins, rosins such as rosin esters, rosin-modified phenol resins, and rosin-modified maleic acid resins. , Rosin modified resin such as rosin modified xylene resin,
Examples thereof include terpene resins obtained from polyterpenes, aromatic modified terpenes, terpene phenols, hydrogenated terpenes, and terpene resins such as terpene-phenol-formaldehyde resins. In the petroleum resin system as a synthetic tackifier resin, a C ₅ system aliphatic or alicyclic hydrocarbon or a derivative thereof, a C ₉ system aromatic or alicyclic hydrocarbon or a derivative thereof is a petroleum system. Resin, styrene, α-methylstyrene or isopropyltoluene homopolymer or copolymer resin, dicyclopentadiene resin, aromatic addition condensation type petroleum resin, coumarone-indene polymer resin, and other xylene resin, phenol resin, styrene- Examples thereof include maleic anhydride copolymer resin and low molecular weight ethylene-vinyl acetate copolymer resin.

The proportion of the tackifier resin in the vehicle is preferably 5 to 20% by weight. If the ratio of the tackifier resin is less than the above range, the effect is not exhibited and the transferability is not improved. On the other hand, if the ratio is more than the above range, the cohesive force of the ink is reduced and the compatibility with rough paper becomes poor.

The content of the color pigment in the heat-meltable ink is preferably 20 to 60% by weight from the viewpoint of ensuring printing density. Further, when the content of the color pigment is such high, blocking can be prevented without mixing particles as an antiblocking agent.

As the color pigment, those conventionally used in this kind of thermal transfer ink ribbon can be used without particular limitation, and the following ones can be used.

Examples of black pigments include carbon black and nigrosine base.

Examples of the yellow pigment include naphthol yellow S, Hansa yellow 5G, Hansa yellow 3G, Hansa yellow G, Hansa yellow GR, Hansa yellow A, Hansa yellow RN, Hansa yellow R, benzidine yellow G, benzine yellow GR, permanent yellow NCG and quinoline yellow lake. One kind or two or more kinds are used.

Examples of magenta pigments include Permanent Red 4R, Brilliant Huast Scarlet, Brilliant Carmine BS, Permanent Carmine FB, Resole Red, Permanent Red F5R, Brilliant Carmine 6B, Pigment Scarlet 3
One or two or more of B, rhodamine lake B, rhodamine lake Y, alizanline lake, etc. are used.

Further, as the cyan pigment, for example, one or more kinds such as Victoria blue lake, metal-free phthalocyanine blue, phthalocyanine blue, and fast sky blue are used.

Inks of colors other than the above colors can be obtained by appropriately combining the above pigments. For example, blue black is obtained by combining a black pigment and a cyan pigment. Further, a dye may be used in addition to the pigment.

A surface modifier may be further added to the hot-melt ink to prevent blocking.
Examples of such surface modifiers include waxy substances such as fatty acid amides. The surface modifier is usually added in a proportion of 0.2 to 1% by weight based on the total amount of the ink.

In the present invention, if necessary, additives such as a dispersant and an anti-aging agent may be added.

In the present invention, a release layer is provided between the base material and the ink layer if the release property from the base material during printing is poor due to the large cohesive force of the heat-meltable ink. preferable.

The release layer is preferably composed mainly of a wax-like substance, and examples of the wax-like substance include polyethylene wax, α-olefin wax, Fischer-Tropsch wax, paraffin wax,
Examples include microcrystalline wax, candelilla wax, and carnauba wax. The release layer may contain a small amount of a heat-melting resin such as ethylene-vinyl acetate copolymer in order to improve the adhesion to the substrate.

From the viewpoint of reducing the thickness of the entire ink ribbon, it is preferable that the release layer also be as thin as possible so as to exert its function, for example, about 0.5 to 2 μm.

Next, the present invention will be described with reference to experimental examples.

Experimental Examples 1 to 10 Polyethylene terephthalate (PET) shown in Table 1
A release layer is formed on one surface of the film (the surface on the opposite side when a stick-prevention layer is provided), and the ink having the composition shown in Table 1 is further applied to a toluene / ethylene glycol monomethyl ether mixed solvent (43 / (7 weight ratio) to form an ink layer by coating to prepare a thermal transfer ink ribbon having the total thickness shown in Table 1.

[0069]

[Table 1]

* 1: P1: calcium carbonate having an average particle size of 2 μm, content 8% 2: S1: thickness of silicone modified urethane resin
Coating layer of 3 μm 3: Melt flow rate 400 g / 10 min ethylene-vinyl acetate copolymer 4: Melt flow rate 15 g / 10 min ethylene-vinyl acetate copolymer 5: Melt flow rate 100 g / 10 min 6: Average Ethylene-vinyl acetate copolymer having a molecular weight of 10,000, 7: fatty acid amide, 8: R1: coating layer made of petroleum wax and having a thickness of 1.0 g / m ² , the following tests were carried out on each of the thermal transfer ink ribbons obtained above. The results are shown in Table 2.

(1) Aperture A Japanese word processor (Lupo 95HP) manufactured by Toshiba Corp. was used to print each ink ribbon (running speed: 10 inches / se).
After c), the ink ribbon after running was observed with an optical microscope to determine whether or not there was an abnormality such as a hole or a crack in the base film of the heating portion.

2 ... No abnormality 1 ... Abnormality (2) Breakage A print running test was carried out in the same manner as in (1) above to determine whether or not the ink ribbon was broken.

2 ... The ink ribbon does not break. 1 ... The ink ribbon was broken.

[0074] (3) running property (slip ratio) performs printing driving tests in (1) the same way, obtains a slip ratio r _s by the following equation, to evaluate the runnability.

R _s (%) = (1−L ₂ / L ₁ ) × 100 where L ₁ is the ribbon print length when printing one line, and L ₂ is the length of the corresponding print dropout mark.

[0076] _{3 ··· r s ≦ 10% 2} ··· 10% <r s ≦ 15% 1 ··· 15% <r s (4) void NEC Corp. serial thermal transfer printer (PC-P
R150 V), maximum printing energy (15 mJ / m)
m ² ), printing was performed on rough paper with Beck smoothness of 30 seconds, the reflection density (OD value) of the obtained printed image was measured, and the presence or absence of voids was determined.

3 ... OD value of 1.5 or more 2 ... OD value of 1.0 or more and less than 1.5 1 ... OD value of less than 1.0 (5) Print density Smoothness with Beck smoothness of 500 seconds by the same method as in (4) above. It was printed on paper and the reflection density (OD value) of the obtained printed image was measured.

3 ... OD value of 1.5 or more 2 ... OD value of 1.0 or more and less than 1.5 1 ... OD value of less than 1.0 (6) Blocking Pancake-shaped ink ribbon (width 13 mm) under high temperature environment (50 It was stored at 85 ° C. and 85% RH for 4 days, and the blocking state was judged.

3 ... The force required to unwind the ink ribbon is 3 g or less. 2 ... The force required to unwind the ink ribbon is 3
greater than g. 1 ... When the ink ribbon is unwound, the ink layer peels off from the base film and adheres to the back surface of the base film.

[0080]

[Table 2]

From the results of Table 2, the following can be seen.

The base material has an average molecular weight of 12 × 10 ³ to 30 × 10
³ , P with heat shrinkage of 3% or less in the vertical direction and 2% or less in the horizontal direction
When the ET film is used, even if the thickness is as thin as 1.5 to 3.0 μm, there is no perforation or breakage and the running property is good (Experimental Examples 1 to 4, 8 to 10).

On the other hand, the average molecular weight of the base material is 12
If a PET film having a thickness of less than × 10 ³ and a thin thickness is used, perforation, breakage, etc. occur and the running property is poor (Experimental Example 5).
Further, the heat shrinkage ratio is larger than the range specified in the present invention,
Moreover, when a thin PET film is used, perforation occurs and the running property is poor (Experimental Example 6). The coefficient of dynamic friction is 0.
With a PET film that is larger than 6 and thin,
Drivability is poor (Experimental example 7).

The heat-meltable vehicle is mainly composed of the heat-meltable resin, and contains 30 wt% or more of the heat-meltable resin having a melt flow rate of 1200 g / 10 min or less, and the carbon black content is 20%. When the above-mentioned heat-fusible ink containing a surface modifier is used, even if the amount of ink applied is as low as 1.5 to 2.5 g / m ² , voids do not occur in the printed image and the print density is high. Moreover, blocking does not occur (Experimental Examples 1 to 4). In addition, if a surface modifier is not used, the blocking resistance becomes slightly poor (Experimental Example 9).

On the other hand, when the content of the heat-melting resin having a melt flow rate of 1200 g / 10 min or less in the heat-melting vehicle is less than 30%, the voids are remarkable when the ink coating amount is small. Also, blocking is remarkable (Experimental Example 10).

[0086]

EFFECTS OF THE INVENTION Despite the thin base material and ink layer of the thermal transfer ink ribbon, the runnability is good, breakage is difficult, the printing density is high, and voids and blocking are prevented. Therefore, the advantages of the thin base material and ink layer, namely reduction of energy consumption during printing, high speed printing, high definition printing, ribbon lengthening, cassette miniaturization, printer miniaturization, etc. To be

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[Procedure amendment]

[Submission date] January 18, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

Examples of such tackifier resins include natural tackifier resins such as hydrogenated rosins, asymmetric asymmetric rosins, polymerized rosins, rosins such as rosin esters, rosin-modified phenol resins, and rosin-modified maleic acid resins. , Rosin modified resin such as rosin modified xylene resin,
Examples thereof include terpene resins obtained from polyterpenes, aromatic modified terpenes, terpene phenols, hydrogenated terpenes, and terpene resins such as terpene-phenol-formaldehyde resins. In the petroleum resin system as a synthetic tackifier resin, a C ₅ system aliphatic or alicyclic hydrocarbon or a derivative thereof, a C ₉ system aromatic or alicyclic hydrocarbon or a derivative thereof is a petroleum system. resins, styrene, alpha-methylstyrene or homopolymer or copolymer resins of vinyl Rutoruen, dicyclopentadiene resins, aromatic addition condensation type petroleum resins, coumarone - indene copolymer resin, other xylene resins, phenol resins, styrene - maleic acid copolymer tree anhydride etc. fat of the like.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0054

[Correction method] Change

[Correction content]

The proportion of the tackifier resin in the ink is preferably 5 to 20% by weight. If the ratio of the tackifier resin is less than the above range, the effect is not exhibited and the transferability is not improved. On the other hand, if the ratio is more than the above range, the cohesive force of the ink is reduced and the compatibility with rough paper becomes poor.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0070

[Correction method] Change

[Correction content]

* 1: P1: calcium carbonate having an average particle size of 2 μm, content 8% 2: S1: thickness of silicone modified urethane resin
Coating layer of 3 μm 3: Melt flow rate 400 g / 10 min ethylene-vinyl acetate copolymer 4: Melt flow rate 15 g / 10 min ethylene-vinyl acetate copolymer 5: Melt flow rate 100 g / 10 min 6: Average Molecular weight 10,000 , melt flow rate 2000g / 10
min . Ethylene-vinyl acetate copolymer 7: fatty acid amide 8: R1: coating layer made of petroleum wax and having a thickness of 1.0 g / m ² The following test was performed on each thermal transfer ink ribbon obtained above. The results are shown in Table 2.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0080

[Correction method] Change

[Correction content]

[0080]

[Table 2]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Tako, 4-14 Minejima, Nishiyodogawa-ku, Osaka City, Fujicopen Co., Ltd. Technical Center (72) Yoshiyuki Kobata, 4-14 Minejima 5-chome, Nishiyodogawa-ku, Osaka Copian Co., Ltd. Technical Center

Claims (9)

[Claims] 1. A film comprising a polyester resin having an average molecular weight of 12 × 10 ³ to 30 × 10 ³ , a thickness of 1.5 to 3.0 μm, and a heat shrinkage ratio of 3% or less in the longitudinal direction and 2% or less in the lateral direction. A substrate for a thermal transfer ink ribbon, which is characterized by: 2. The substrate for a thermal transfer ink ribbon according to claim 1, wherein the dynamic friction coefficient of the film is 0.6 or less. 3. The substrate for a thermal transfer ink ribbon according to claim 1, wherein the film contains 1 to 30% by weight of particles having an average particle size of 0.1 to 5 μm. 4. A film comprising a polyester resin having an average molecular weight of 12 × 10 ³ to 30 × 10 ³ , a thickness of 1.5 to 3.0 μm, and a heat shrinkage ratio of 3% or less in the longitudinal direction and 2% or less in the lateral direction. A thermal transfer ink ribbon, characterized in that a heat-meltable ink is applied on one side at a coating amount of 1.5 to 2.5 g / m ² . 5. The thermal transfer ink ribbon according to claim 4, wherein the dynamic friction coefficient of the film is 0.6 or less. 6. The thermal transfer ink ribbon according to claim 4, wherein the film contains 1 to 30% by weight of particles having an average particle size of 0.1 to 5 μm. 7. The thermal transfer ink ribbon according to claim 4, wherein the total thickness is 3.0 to 5.5 μm. 8. The heat-meltable vehicle in the heat-meltable ink is mainly composed of the heat-meltable resin, and contains 30% by weight or more of the heat-meltable resin having a melt flow rate of 1200 g / 10 min or less. 6. The thermal transfer ink ribbon according to item 6 or 7. 9. The thermal transfer ink ribbon according to claim 4, wherein the content of the color pigment in the hot-melt ink is 20 to 60% by weight.