JPS5878761A - Easily adhesive biaxial oriented polyester film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a uniaxially abrasive polyester film which has improved 100-order processability by providing a coating layer on at least one side of the polyester film.

More specifically, a coating layer of a specific polyester resin and a specific polyurethane resin is provided on at least one side of a polyester film. This invention relates to a uniaxial stretch polyester film with good visibility.

Co-axially oriented polyester film, especially polyethylene terephmerate a-axis oriented film, has a transparency of 1 dimensional stability of 1
Excellent mechanical properties, heat resistance, electrical properties, gas barrier properties, needle quality, etc.

It is used as a base material for packaging materials, electrical insulating materials, metal magnetic materials, photosensitive materials that use scissor salts, diazotized metals, photosensitive resins, etc., graphic materials, electrophotographic materials, magnetic recording materials, etc.

In these applications, -axially oriented polyester films are required to have adhesion properties.

For example, for packaging materials, adhesion with printing ink and laminating materials, for photosensitive materials, adhesion with photosensitive layers with binders such as gelatin or polyvinyl alcohol, for drafting, for example, adhesion with capping agents, and for metal vapor deposition materials. Adhesive properties with Fi vaporized gold and magnetic recording materials with magnetic layers are required.

Methods for improving the adhesion of uniaxially stretched polyester films include copolymerizing 1% polyester-forming components, blending specific A+ fats into polyester to form a film, flame treatment of polyester films, and corona treatment. Repetitive treatment methods such as discharge treatment, plasma number range treatment, Shigai irradiation treatment, and chemical treatment using specific organic compounds or inorganic compounds are known. but.

Copolymerization methods, composition-based methods, and surface treatment methods are not necessarily satisfactory methods for the above-mentioned applications, as the contact force changes with time and also has a high bulk contact force. (・.

Due to the nature of this process, usually a different coating agent is applied to the film depending on the purpose of use, and the film is used in bulk. However, in general, biaxially oriented polyester film 7M IIi fabrics have poor adhesion to copper-containing surface materials; conversely, coatings that have mS properties with surface materials have poor mS properties with -axially stretched polyester films (if there are any defects). In addition, even if there is a difference in the number of coats between the stretched polyester film and the fixed surface material, the removability will not necessarily be the same as that of most of the surface materials. ^ There is no limit to what you can do.

Furthermore, even if a coating agent with good adhesion between the axially stretched 1st grade polyester film and the surface layer material is used, the wetting property of coating 4ti 44 on the polyester film is poor.

Such shortcomings and intermediate problems are caused by the fact that the lubricant used is laborious.
It also arises from the chemical structure changes to make it a water-soluble or water-dispersible type rather than an organic solvent solution type in order to save money, save money, and save energy.

Water dispersion type coating agents have conventionally used dispersants such as so-called interfacial agents to achieve resin dispersion and female consistency. However, when such liniments are used, the compositions such as surfactants contained in Ikubuhato may have a negative effect on the characteristics of the dofu layer of the Azaru. A so-called Noblesse Firefly water-dispersible i/114 agent that does not contain has been developed.

When such a coating agent is used, it is often O, which has poor wettability to the polyester film and lacks reliable distribution.

For example, although copper-based ester thread resin has good coating and adhesion properties to polyester films, it is often inferior to 1iI note to many surface materials; So, the coating agent for polyuremen thread resin is 1
It has good adhesion to surface layer agents, but is often inferior in spreadability and adhesion to polyester films.

According to the present invention, the conventional method is +1! In other words, the present invention improves the drawbacks of polyester films using fabric agents.In other words, the present invention is a polyester film containing polyethylene terephthalate as a base component. The present invention relates to a uniaxial, single-stretch polyester film coated with a water-bathable or water-dispersible polyester thread resin containing a water-bathable or water-dispersible polyurethane resin containing an anionic group.

The polyester film constituting the substrate in the present invention has ? A polyethylene terephthalate film in which Q moles or more are ethylene terephthalate.

The water-soluble or moisture #X-injection polyesterone thread resin having a sulfonic acid group used in the present invention is disclosed in Tokko Sho ni 2-ni 0773. 0-13 Hiro? No. 7, Akira Machikai! θ-/2/jJ4 No. 12-/! It is possible to use a known polyester such as No. JtHθ or a polyester similar thereto.

For example, 7-carboxylic acid #kta hh of polyester, terephthalic acid, inofumel, -2,-t-naphthalene dicarboxylic acid and their ester-forming alligator conductors are used as substitutes for aromatic dicarboxylic acids, and aliphatic dicarboxylic acids Examples include adipic acid, acelain eII
1. Sebanoic acid and its ester-forming derivatives are used, and examples of the oxymonocarboxylic acids include oxybenzoic acid and its nisal-forming derivatives.

The glycol components of the soap include aliphatic, alicyclic, and aromatic compounds, such as ethylene glycol, 41-butanediol,
Diethylene glycol, trisulfate ethylene glycol, y-7p hexanedimethanol, P-xylene/all tx and kq fL
, so-called polyethylene glycol as an example of poly(oxyalkylene) glycol.

Poly-10 pyrene glycol, polytetramethylene glycol, etc. are used.

As the polyester, it is possible to use not only a saturated linear polyester made of the above-mentioned ester-forming component, but also a polyester made of a compound having an ester-forming component of trivalent or higher valence or a polyester having a reactive unsaturated group.

A polyester having a sulfonic acid group can be produced using a compound having a sulfonic acid group to be obtained as a polyester component together with the above-mentioned polyester layering component.

Examples of compounds with sulfonic acid groups are:

Metal spears such as sulfoisophthalic acid, sulfoterephthalic acid, V-sulfonaphthalene, 2-dicarboxylic acid and its esterified synthetic derivatives are used. An example of gold w4 salt is lithium.

Sodium, potassium, magnesium, etc. are preferred. A very suitable compound among these is! - Sociosulfo now phthalate is radiosulfo/methyl inphthalate.

Another method for introducing sulfonate I bases into polyester is to sulfonate the unsaturated base of polyester with an ester-forming aliphatic unsaturated compound as a copolymerization component using a sulfonating agent such as sodium bisulfite or sodium metabisulfite. An example can also be given of the ``hoden''.

The aromatic dicarbonate weight in the dicarbonate iron component of the polyester resin is preferably in the range of 10 moles to 10 Q moles. This is to lower the softening point of the polyester thread resin and improve its adhesion.

The dicarboxylic acid having a sulfonic acid group is preferably present in the dicarboxylic acid in an amount of 1 mol % to -0 mol %.

- If the amount of sulfonic acid base was small, the water solubility or water dispersibility was insufficient, and if the amount of sulfonic acid group was large (to #), the water resistance of the lower me layer after coating was poor. ], this is because the films tend to adhere to each other due to moisture absorption.

Examples of the water-soluble or water-dispersible polyurethane resins having an anionic group used in the present invention include JP Kokko Shogu 111/Deni No., JP Kokko Shoda 4-7720 No., *Ko-Dub-10 / De J issue, special Akita? -1713
No. 9 1% Kaisho! θ−/Jj/? No. 7, JP-A-13-/2
No. 4011 1% Sekisho! It is possible to use a polyurethane type l1liIj1 known as Dar/11091 or the like or a polyurethane type resin similar thereto.

The main constituents of polyurethane forming ingredients are:

These include polyisocyanates, polyols, *lengthening agents, crosslinking agents, etc.

Examples of polyisocyanates include tolylene diisocyanate, phenylene diisocyanate, Q, *'-diphenylmethane diinocyanate, hekitsu' methylene diisocyanate, xylylene diisocyanate, *, *'
-Dicyclohexylmethane diisocyanate, isophorone diisocyanate, etc.

Examples of polyols include polyoxyethylene glycol, polyoxypropylene glycol, polyoxytetramethylene glycol, polyethers at 7', and polyethylene adipate.

Examples include polyesters such as polyethylene-butylene heptopate and polyol-10 lactone, acrylic polyols, and castor oil.

- Examples of long-wearing agents or crosslinking agents include 1° ethylene glycol and fluoropylene gellicol.

Butanediol, diethylene glycol, trimethylolpropane, hydrazine, ethylenediamine, diethylenetriamine, a,p'-diaminodiphenylmethane,
Examples include 4t, u'-cya dicyclohexylmethane, and water.

Polyurethane resins have anionic groups.

A method in which a compound having an anionic group is used as a polyurethane forming component such as a polyol, a polyisocyanate compound, a chain extender, etc. A method in which an unreacted incyanate group of the produced polyurethane is reacted with a compound having a 7-anionic group.

It can be produced using a method in which a group having active hydrogen of polyurethane is reacted with a specific compound.

In the method of using a compound having an anionic group as a polyurethane forming component, for example, a compound obtained by a method of sulfonating an aromatic plate isocyanate compound, a cyanocarbonate salt, a sulfuric acid ester salt of an amino alcohol, etc. can be used.

A method for reacting unreacted incyanate groups of polyurethane with a compound having an anionic group is 1, for example, with bisulfite. Aminosulfonic acids and their salts, aminocarboxylic acids and their salts.

Sulfuric esters of amino alcohols and their [111
, human σ-oxyacetic acid and its salts, etc. can be used.

Methods of reacting polyurethane's active hydrogen-containing groups with specific compounds, such as dicarboxylic anhydride, buto-2-carbofic anhydride, and sultone.

Lactone, epoxy carbonate, epoxy sulfonic acid,
-, -monodioxooxazolidine, isatoic anhydride,
A 3- to 7-membered cyclic compound exhibiting a salt group or a group capable of forming a salt after ring opening, such as hostone or carbyl sulfate, can be used.

Polyurethane resins include polyols and polyisocyanates with a molecular weight of 300 to -〇〇〇.

A chain lengthening agent with a reactive waterwheel atom and a group that reacts with isocyanate groups, and an anionic group of at least /#
A resin consisting of a compound having the following is preferable.

Anionic groups in polyurethane resins.

-do, 11, -080. Lithium salts such as H, -000H.

Used as sodium salt, potassium salt or magnesium salt.

Sometimes preferred is a sulfo/Hani group.

What is the amount of anionic groups in polyurethane resin?

o, or% by weight to rl% by weight are preferred. This is because if there is a small amount of anionic base, the water-soluble a of the polyurethane resin will become wet and the film will become more susceptible to mutual KrA11L.

How to make a water-soluble or water-dispersible polyester resin containing a sulfone group and a water-soluble or water-dispersible polyurethane resin containing an anionic group into a polyester film Kl&cloth, polyester resin and polyurethane System M (D) A method of applying a mixed aqueous solution or a mixed aqueous dispersion to a polyester film, or applying an aqueous solution or aqueous dispersion of a polyester thread resin to a polyester film and then applying a water S solution or an aqueous dispersion of a polyurethane thread resin. A coating method can be used.

Mixed water of polyester resin and polyurethane resin #1
The composition of the aqueous dispersion or mixed aqueous dispersion is preferably from 0% to 0% by weight, more preferably from 7% to 70% by weight of the polyester resin based on solid content.
is preferred.

If the proportion of the polyester resin was less than 7% by weight, the coatability of the mixed aqueous solution or aqueous dispersion to the base polyester film was inadequate, and the adhesion of the coating layer to the λ-axis stretched polyester film was insufficient. I will do it. Also, the proportion of polyester resin! If it exceeds 0111%,
Adhesiveness of the polyurethane resin to a specific surface layer material cannot be sufficiently exhibited.

A method of applying a polyester thread resin to a polyester film and then applying a polyurethane resin is to apply a water S solution or an aqueous dispersion of a polyester resin to a polyester film Km cloth.

Next, a method of applying an aqueous solution or aqueous dispersion of a polyurethane resin with appropriate drying or without drying at all, or a method of applying an aqueous solution or dispersion of a polyurethane resin, or a method of applying an aqueous solution or dispersion of a polyurethane resin, or a method of applying an aqueous solution or dispersion of a polyurethane resin, or a method of applying an aqueous solution or dispersion of a polyurethane resin without drying at all.

Maki Shoten / Published in 2007, Igi of "Coating Method"
A method of simultaneously applying a polyester layer and a polyurethane layer to a polyester film using a multilayer curtain coater as shown in 4tl@VC is preferred, among which a method of applying a mixture of both resins in advance is preferred.

In addition to the above-mentioned multilayer curtain coater, a reverse roll coater can be used as a coating device for applying polyester resin, polyurethane resin, or a mixture thereof to a polyester film.

A Goufpier coater, a double coater, an air doctor coater, or other omniscient O apparatus can be used.

This @〇-axially stretched polyester film is produced by applying one type of resin to the base polyester unstretched film and uniaxially stretching it sequentially or simultaneously. It can be produced by a method of stretching in a direction perpendicular to the previous l-axis stretching direction, and a method of fabricating a uniaxially stretched polyester film.

Apply a resin paste to the l-axis stretched polyester film using a roll stretching machine, and then dry it thoroughly or without drying, immediately apply the polyester l@star stretched film in a direction perpendicular to the stretching direction using an O-grit. It is preferable to manufacture by a method of grinding and heat treatment.

According to this method, the Km fabric layer can be dried simultaneously with stretching, and the thickness of the coating layer can be made thinner depending on the stretching method.

The thickness of the coating layer on the coaxially stretched polyester film is o
, from oiμ! A range of μ is preferred.

More preferably 0. It ranges from Oj fi to lμ. If the thickness of the m fabric layer is less than 0.0/μ, it is difficult to apply it uniformly, so uneven coating tends to occur on the #i product, and the adhesion is insufficient in various camphor applications. In addition, if the thickness of the coating layer exceeds jfi, the films will stick together (blocking) or stick together, making it difficult to handle the film. If necessary, the coating layer of the film of the present invention may contain a
Ki/G inhibitor, 114%, dye, #1Ill imitation particles, antioxidant/antioxidant, ray absorber, antistatic agent.

11 foaming agent etc. can be contained.

This is because the fabric is made of Kmm cloth layer water.

Depending on the firing requirements, water-soluble resins such as gelatin, polyvinyl alcohol, and silicone resins, vinyl resins, and 0-emulsicone resins such as two-oxygen resins can be added to the coating layer.

The uniaxially stretched polyester film provided with the coating layer of the present invention is a major binder for surface layer materials for various uses.
Cellulose, polyvinyl alcohol, gelatin, rah
*Cellulose, vinyl chloride-#11 [vinyl copolymer,
It has good adhesion to vinylidene chloride resins, acrylic emulsions, polyurethane, etc., and also good adhesion to S-plated metals, so it can be used as enveloping materials, photosensitive materials, oboro materials, Oniko photographic materials, and magnetic materials. It can be used as a base material such as a recording material.

Hereinafter, the present invention will be explained with examples.

In addition, the positive evaluation of negative values is based on the H value method described in the first section.

/ Spreadability The coatability when applying a coating agent to a polyester film was evaluated based on the first standard.

O: Can be applied uniformly, causing no practical problems.

△: Adhesiveness is poor, and some repellency is observed on the coated surface.

x: i* Poor resistance to coating agents.

- Transparency Transparency was evaluated based on the following criteria using an integrating sphere type Motogan Kyotei measurement FIIM or visual observation.

○: There is no practical problem.

Δ: There are uses that pose practical problems.

X: Not practically usable.

Adhesion between the base polyester film and the heavy fabric layer of the quadriaxially oriented polyester film provided with the coating layer of the present invention was evaluated using the Ash method.

Apply cellophane tape made by Nichiban Co., Ltd. with a width of 1wm to the coated layer of the film to a length of 7 cm (Q length) to prevent pyroelectricity from entering, and then apply a constant load on this with a J4O4-part type load roll.Fix the film and apply a cellophane tape. joolc) @
Adhesiveness was evaluated by a method in which a peel test in the 7/Q0 direction was started after the adhesive was connected to the 7/Q0 direction and allowed to fall naturally over a distance of 1.

Adhesion was determined by U value based on the primary ozR11i1tv standard.

3 or more is a practical range H.

J, no peeling towards cellophane tape, 4t: 10%
It can be used without problems if it peels off toward the cellophane tape only if the index is less than or equal to DA.

3: 10 to 10% O Partially peel off the tape.

A portion of 22 JO% or more peels off into cellophane.

/: Completely peels off like cellophane tape.

l FM observation 1 carbonity (boot kinging property) test is carried out by overlapping the polyester film and the coated surface or coated coats, @ degree is 40
This is a method of visually observing whether the load is moving in all directions at ℃ or θ℃.・Reference? lJ/m production example of polyester resin ・Dimethyl teletumerate j j, 7 fl, dimethyl inphthalate 20.055. j-Nonosulfodimethylisophthalate),? ,/fig, ethylene glycol woe, diethylene glycol/(#), calcium acetate-°/water salt O2O mixed with DeS.

Transesterification is carried out at 200 DEG to -30 DEG C. until the theoretical amount of methanol is 4.

Next, 0.0 parts of orthophosphoric acid was added, and then 0.0 parts of antimony trioxide was added. 1 part of OJ was added and polymerization was carried out at 210°C under reduced pressure. The specific viscosity of the polymer O obtained in this way is /, jJ
Met.

Reference Example - Production Example of Polyurethane Resin A polyether containing sulfonate groups (So, - content 1,
1% by weight, polyethylene oxide content 12% by weight)7
21 parts, polytetramethylene adipate (molecular weight - J
θ) 10/j parts, bisphenol A-initiated phlegm/oxide polyether (molecular weight 110) 24
Mix tl@ and dehydrate under vacuum at 700°C. To this mixture was added a mixture of isophocyanate/71@ and heqibumethylene-l, ≦-4ty parts of diisocyanate, and then the resulting mixture had an incyanate content of 1.4 parts. Stir in the range of 10°C to ?θ°C until the temperature reaches %.

The greholimer is cooled to 40'C and biuret polyinsyanate J4 parts obtained from 1 mole of hexamethylene diisocyanate and 1 mole of water, bisketimine/71@ obtained from acetone and bisketimine/71@ are sequentially added.

Hydrazine water phase 7! A portion of water preheated to 10° C. is added to this mixture with vigorous stirring.

In this manner, an aqueous polyurethane dispersion was obtained.

Implementation@l As the aqueous dispersion of polyester resin, Finetex Shin 5-tzo (trade name) manufactured by Dainippon Ink and Chemicals was used.

As the water dispersion t of the polyurethane resin, Inplanil DLli (trade name) manufactured by Bayer was used.

Co-axially oriented polyethylene terephthalate (P) was prepared by combining the polyester thread resin and polyurethane thread resin together using a one-time moisture friendly f#LO bar coater.
IT) was applied onto a film and dried for 2 minutes at a temperature of 10°C.

The coating properties of the aqueous dispersion on the FAT film are extremely good.

The transparency of the film after -4 was extremely good regardless of whether the mixture of polyester resin and polyurethane resin was applied.

The adhesion of the coating layer to the PjCT film was extremely good. PK with this O coating layer? The adhesion between the film and the main binder am of the surface layer material for each woodcutter application was extremely excellent. The results are shown in Table 1.

The contents of the binder resin are shown in the table.

In particular, the solid content of polyester resin and poly9 urethane thread am is 1% by weight each. It is remarkable that the coating properties and adhesion are extremely excellent even when the amount of polyester thread resin and the amount of polyester thread resin are extremely small. It is inferred (table-/, numbering).

The compositions of Finetex E8-410 and Inplanil DLi (used in Examples 9) are as follows.

The main components are sophthalic acid and sodiosulfoiiso-heptatalic acid, and the glycol components are ethylene glycol and diethyl glycol, and the amount of sodium sulfone-heptadalic acid is about 1 mole based on the dicarboxylic acid component.

Incranil DLH: Mainly contains hexamethylene leisocyanate as an inocyanate component, contains sodium sulfonate, and has a heavy IIL of 7 to 7%.

Fruitful example - As the aqueous dispersion of polyester resin, 7 Fintex E8-4jO manufactured by Dainippon Ink and Chemicals was used.
' Inplanil DLk1 manufactured by Bayer was used as the aqueous dispersion of polyurethane thread resin.

Biaxial m-stretched polyethylene terephthalate (PET) film /-/θmuj1% III
The L polyester thread resin was rubbed with a #l percoater and dried at 10° C. for 2 minutes.

The coatability, transparency, and resistance to PICTK of the 9 layers of undercoat film O were excellent.

The coatability of the polyester resin undercoating urethane aqueous dispersion of this film was extremely good. The applied film was dried at 10° C. for 2 minutes.

This film had good transparency and adhesion to PKT.

The results are shown in Table JK. Table 1 shows the results of examining the adhesion between this PET film and the main binder resin for surface layer materials for various uses.

It can be seen that the adhesiveness is extremely excellent.

Comparative Example/An aqueous dispersion of polyester resin was Dainippon Ink Kagaku Jogyosha Go Filetex IB-4! I used it for 01kf. The moisture content of the polyurethane thread resin was 7. An aqueous dispersion of a polyester resin or an aqueous dispersion of a polyurethane resin was coated on a PET coaxially stretched film and evaluated for Km fabrication in the same manner as in Examples. The evaluation results are shown in Table J.

When only polyester resin is applied, the coating properties, transparency, and adhesion to PICT are good, but
Adhesion to the binder resin of polyvinyl alcohol was poor (Table 7, No.). When only polyurethane resin is applied, the applicability is extremely poor.
It was not possible to apply the coating without using a coating solution with a cylindrical concentration. (
Table-j, number-) Take out and cast on a cooling drum at 30℃ -1 thickness approx. 1
An unstretched film of 0μ was obtained.

Next? It was stretched 3.3 times in the machine direction at j'C. On one side of this longitudinally stretched film: A chain containing the resins shown in the polymerization example of polyester resin and the polymerization example of poly9 urethane resin, each with a solid content of 20% by weight and 10% by weight! 1
A 10% by weight aqueous dispersion was applied thereto, then dried in a tenter, stretched 7 times in the transverse direction with Ilo"C, and heat-set under tension at -1.theta.C.

The film thus obtained has approximately 0.0. /i
It was a film of approximately Jθμ having a mixed layer of ll/d polyester, iii, *fat and polyurethane-based ago.

The coating properties of this film and the adhesion between the base film and the coating layer were good. Furthermore, an adhesion test was conducted by overlapping the 11i fabric and the PK'r surface under a load of [, Jθ°C, 4j'% RH1109/(:d) for 10 hours, but no adhesion was observed.

The coated surface of this film is Diazotype 8D-10 (trade name, water resistant) or Diazotype 8D-440 (product name, water resistant), a coating agent for screen printing made by KIAEB Chemical Research Institute @.
(trade name, solvent resistance) was coated to a thickness of 4 μm after drying.After 11111 hours of exposure, an adhesion test between the photosensitive layer and the P1″r film base material was conducted, and the practical results were confirmed. There was no confusion.

On the other hand, the PIT film which was not coated with a coating agent and which was spread in the same manner as in this example had a photosensitive layer and poor OS visibility, and could not be used for general use.

EXAMPLE 8-mzo was used as the polyester resin made by Dainippon Ink & Chemicals Co., Ltd., and 8-mzo was used as the polyurethane resin. Ill cloth agent copper IIItL is! The solid content of the polyester thread IIi fat and polyurethane resin is 30 μm and 7Q, respectively. Using this coating agent, apply approximately 0.07i/al on one side in the same manner as in Example 3.
polyester resin and poly9L/men-based tree M'FI (
An axially oriented film of approximately /Jμ (QPBT) with a D mixed layer was obtained.

This film had extremely good transparency.

On top of the KPIT mountains, 0°C, to%RH,
10011/cdc) load for 10 hours and an adhesion test was conducted, but no adhesion was observed.

Printing was performed on the coated surface of this film using Cellocolor 0087 (trade name), a printing ink for cellophane manufactured by Toyo Ink Manufacturing Co., Ltd. In the Sellotape peel test, this film was
The printed layer did not peel off. On the other hand, Pffi without the m cloth layer ◆ which was fill-hatched in the same way as in this example? Jll
The stretched film O-insu layer was thinner.

That is, it can be seen that Motoyaimei's uniaxially stretched P17 film is useful in the use of seal wrapping film.

Example J Using the same coating agent as in Example J and forming a film in the same manner, a film having a mixed layer of about 0-0717 dt) polyester resin and poly9 urethane thread resin 0 was produced. μOa axial stretching P]C? I got the film.

Apply the following magnetic paint to the coated surface of this film, and
℃ for 1 minute and aged for 2 hours. The thickness of the magnetic layer is approx. It's a voice.

A Tit peel test using Tensilon was conducted using this film. The peel strength of this film is approximately 7/j
/4 inch, while for the coating layer T-silent uniaxially oriented Pi film, it was about 34,777 inches.

That is, it can be seen that the coaxially stretched PIT film of the present invention is also useful as a film for magnetic recording materials.

Magnetism II! Composition of 1@ Polyurethane jOfm, nitrocellulose - 0 parts, vinyl chloride vinyl acetate resin J0s, incyanate compound 7.7 g, carbon black 71 parts, lecithinta part, sand - Fe, Os
@ 40 II t Methyl ethyl ketone: toluene, methyl isobutyl ketone; 7:/:/Q Dispersed in 900% solvent and 1lllll.

Example 4 Polyester resin Toshishiki Dainippon Ink & Chemicals Co., Ltd.
Lc) Finetex 1B-47σfj weight%? I
The polyurethane resin was used as Inplanil DLHIJ manufactured by Bayer AG at 8% by weight. In the same manner as in Example 3, polyester resin T-coating 17 was applied to a stretched longitudinally stretched film and dried. Next, a polyurethane resin was applied, followed by transverse stretching using a tenter in the same manner as in Example J and fi1, followed by heat setting.

The resulting uniaxially stretched pxte film has a thickness of about 0.0/I
The film had a thickness of approximately /-2μ and had a coating layer consisting of a polyester resin layer of /♂ and a polyurethane resin layer.

The coatability and adhesion between the base film and the coating layer of this film were good, and the transparency was also excellent.

4It0 between the llls side and PI3 side of this film.
℃, 10% RH% 10011/ad (D load) for 40 hours, and a ml property test was conducted.

No sticking property was observed in this test.

Printing was carried out on the coated surface of this film using SE'11'7-00ar, a -ka seal ink manufactured by Toyo Ink Manufacturing Co., Ltd. In the separator tape peeling test, no peeling was observed in the printed layer of this film.

That is, the film can be useful in printed packaging film applications.

On the other hand, when a polyurethane resin is applied to a longitudinally stretched film that has a polyester resin layer, the polyurethane thread resin layer is repelled, and the uniaxially stretched PjliT film obtained in this way and the printing ink are Sef color 00
Adhesion with 8 guns was poor.

−2

Claims (1)

[Claims] il+ A water-soluble or water-dispersible polyester resin containing a sulfonic acid group and a water-soluble or water-dispersible polyurethane containing an anionic group on at least one side of a polyester film containing polyethylene terephthalate as a main component. An easily adhesive self-oriented polyester film coated with a polyester resin. (2) The polyester thread resin mainly consists of a dicarboxylic acid component and a glycol component, in which the aromatic dicarboxylic component accounts for jO to 100 mol%, and the dicarboxylic acid component having a sulfonic acid group contains 1 to -07 mol%. 2. The polyester film according to claim 1, wherein the polyester film is polyester. (3) The polyester film according to claim 1 or 1, wherein the content of anionic groups in the polyurethane thread resin is o, oj-r weight.