JP5334393B2 - Method for manufacturing film coating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a film-applied material by which the occurrence of winding displacement or winding wrinkle can be suppressed when rolling a long film-applied material, a rolled form is excellent, and the breakage of microcapsules in the film can be suppressed when forming the film by using the microcapsules, in particular. <P>SOLUTION: In this manufacturing method of the film-applied material, which has a coating film composed of a liquid A and a coating film composed of a pair of protective lug liquid B holding the film there between in the width direction orthogonal to the longitudinal direction of a base material on the long base material, either one of the liquid A or the protective lug liquid B is applied on the base material to form the coating film, and the other liquid is applied to be made in contact with an end in the width direction of the film so that the viscosity of the coating film at a shearing speed of 10<SP>-2</SP>sec<SP>-1</SP>of the coating film is &le;10,000 mPa s. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a method for producing a film coating material such as a long type that can be wound into a roll, for example.

As a material for image recording, there are various forms such as a sheet type and a roll type. In the case of a roll type, it is generally produced by applying a desired liquid on a long substrate. One example of such a material is a material for pressure measurement.
The material for pressure measurement is used for applications such as liquid crystal glass bonding, solder printing on printed circuit boards, and pressure adjustment between rollers. Such a material for pressure measurement includes, for example, a pressure measurement film represented by a prescale (trade name) provided by FUJIFILM Corporation.

  As an example of this pressure measurement film, a pressure measurement sheet using a color reaction between an electron donating colorless dye precursor and an electron accepting compound is disclosed (for example, see Patent Document 1), and 0.1 MPa to 20 MPa. It is said that it can be measured within a certain pressure range. The pressure measurement film has the characteristics that it can be used by cutting the film into an arbitrary size according to the measurement site, and, unlike so-called pressure-sensitive copying paper, which causes a color reaction due to high linear pressure due to writing pressure, It has the feature that pressure can be measured.

  When a roll-type pressure measurement film capable of measuring a low pressure of about 0.1 MPa is stored and transported, the desired images and color density cannot be obtained in actual use due to contact or rubbing between the films. There was a problem. In order to solve such a problem, when the base material is a polymer film as a material for reducing the contact pressure between the winding members of the winding roll, for example, a knurling applied to an end in the width direction of the film There is known a method of preventing adjacent films from contacting each other when wound up by providing unevenness (also called knurling) or inserting a strip-like film called edge tape at the end in the width direction of the substrate. ing.

  However, in the case of the web-like polymer film subjected to the knurling as described above, if the thickness of the coating film exceeds the thickness of the uneven portion of the knurling, the coating film and the back surface of the base material in contact with each other are in contact with each other. End up. In addition, when inserting the edge tape as described above, it is necessary to provide a device for inserting the edge tape immediately before winding, and there is a problem that equipment cost is required along with tape cost.

As a method capable of reducing such equipment costs, a method has been introduced in which thick film coating portions are formed in the vicinity of both end edges in the width direction of the coating film to prevent contact between winding members (for example, Patent Documents). 2, see). Specifically, a gravure coating method using a gravure roll with a cell pattern having a larger amount of coating liquid transfer at both ends than the center of the winding member, and both ends of the slit width at both ends from the center A wider slot die coating method is also shown.
Japanese Patent Publication No.57-24852 JP 2002-68540 A

However, even when the method described in Patent Document 2 is used, when a liquid containing microcapsules is applied on a substrate, such as the pressure measurement film of Patent Document 1, the amount applied is increased. However, the thickness on the plane of the capsule only increased and the thickness could not be increased.
In addition, for example, a pigment-based liquid different from the microcapsule-containing liquid is applied outside the effective product coating width (an area for protecting the coating film portion that is the product of the pressure measurement material, also referred to as “protective ear”). As a method of providing, it is conceivable that the protective otic solution is applied in stripes before the application of the microcapsule-containing solution, and once dried, the microcapsule-containing solution is applied. However, once the protective ear liquor is dried, a thick coating is likely to occur in the protective ear liquor, and when the protective ear liquor is dried and the protective ear portion has a thickness of 20 μm or more, it is wound into a roll. At this time, there was a problem in that winding deviation and wrinkle occurred, and capsule destruction occurred. Further, the interval between the protective ear coating and the microcapsule coating tends to be uneven, and there is a problem that the appearance is poor when trying to make a product including the protective ear layer.

  In view of the above circumstances, the present invention suppresses the occurrence of winding misalignment and wrinkle when a long film coating material is wound into a roll shape, and is excellent in the roll winding form. An object of the present invention is to provide a method for producing a film coating material capable of suppressing the destruction of microcapsules in a coating film when applied and formed (for example, when a pressure measurement material is produced).

Specific means for achieving the above object are as follows.
Hereinafter, the coating film obtained by applying the liquid A is referred to as “coating film a”, and the coating film obtained by applying the protective ear liquid B is referred to as “coating film b”.
<1> On a long substrate, in a width direction orthogonal to the longitudinal direction of the substrate, a coating film made of liquid A, and a coating film made of a pair of protective ear liquids B sandwiching the coating film, A coating material is formed by applying either one of the liquid A or the protective ear solution B on the substrate, and the coating film has a shear rate of 10 ^−2. It is a manufacturing method of the film | membrane coating material which apply | coats the other liquid so that the edge part in the said width direction of the said coating film may be touched while the viscosity in sec- ¹ is 10,000 mPa * s or less.

According to the method for producing a film coating material described in <1> above, while the viscosity of the coating film previously formed by coating at a shear rate of 10 ⁻² sec ⁻¹ is 10,000 mPa · s or less, it is long. By coating the liquid A and the protective ear liquid B so as to be in contact with each other on the scale-shaped substrate, the respective film thicknesses of the coating film a and the coating film b can be leveled. The thick coating of b (protective ear part) can be suppressed, and a winding roll having a good shape can be obtained in which the level difference between the coating film a and the coating film b is gentle. Therefore, the product appearance of the film coating material is excellent.
It is preferable that the coating film a and the coating film b do not overlap.
Hereinafter, a state where “the viscosity of the coating film at a shear rate of 10 ⁻² sec ⁻¹ is 10,000 mPa · s or less” may be referred to as “before drying”.

<2> The method for producing a film coating material according to <1>, wherein the liquid A and the liquid B are simultaneously coated on the base material.

  According to the method for producing a film-coating material described in <2>, the apparatus cost can be reduced by simultaneously applying the liquid A and the protective otic liquid B onto the base material. The production efficiency is good.

<3> The surface tension of the protective otic liquid B is lower than the surface tension of the liquid A, and the difference thereof is within 4 mN / m. <1> or <2> It is a manufacturing method of a film coating material.

  According to the method for producing a film coating material described in <3>, the surface tension of the protective otic liquid B is lower than the surface tension of the liquid A, and the difference is within 4 mN / m. And the protective otic liquid B are applied onto the base material, and the liquid A or the protective otic liquid can be obtained by the liquid approaching toward the higher surface tension of the liquid (drying) during drying of the coating film. It is possible to prevent the coating amount distribution of B from changing and to obtain a film coating material having a good appearance when a product including a protective ear portion is to be produced.

<4> The difference between the water content of the liquid A and the water content of the protective ear fluid B is 10 g / m ^{2 or} less, according to any one of <1> to <3>, This is a method for producing the film coating material.

According to the method for producing a film coating material according to <4>, the difference between the water content of the liquid A and the water content of the protective ear fluid B is within 10 g / m ² , By applying the protective otic liquid B onto the base material, the liquid A or the protective otic liquid can be obtained when the liquid approaches the liquid film having a low water content during the drying of the coating film (liquid approach). It is possible to prevent the coating amount distribution of B from changing and to obtain a film coating material having a good appearance when a product including a protective ear portion is to be produced.

<5> The film coating according to any one of <1> to <4>, wherein the liquid A is a coating liquid containing microcapsules encapsulating an electron-donating colorless dye precursor It is a manufacturing method of a material.

  According to the method for producing a film coating material according to the above <5>, even when a coating liquid containing a microcapsule containing an electron donating colorless dye precursor as the liquid A is coated on a substrate, the film When the coating material is wound up in a roll shape, the winding and wrinkling of the film coating material can be suppressed, so that the microcapsules can be prevented from being broken.

<6> The film coating according to any one of <1> to <5>, which is used for producing a pressure measurement material using a color-forming reaction between an electron-donating colorless dye precursor and an electron-accepting compound It is a manufacturing method of material.

  According to the method for producing a film coating material according to <6>, an electron donating colorless dye precursor is obtained by the method for producing a film coating material according to any one of <1> to <5>. By creating a pressure measurement material that utilizes the color reaction between the electron-accepting compound and the electron-accepting compound, even if the pressure measurement material is wound into a roll, the pressure measurement material is not easily damaged, and the pressure measurement material can be efficiently measured. A material can be made.

  According to the present invention, when a long film coating material is wound in a roll shape, the occurrence of winding deviation and winding wrinkles is suppressed, and the roll winding form is excellent. When forming (for example, producing a material for pressure measurement), a method for producing a film coating material capable of suppressing the destruction of the microcapsules in the coating film can be provided.

<Manufacturing method of film coating material>
Hereinafter, the manufacturing method of the film coating material of this invention is demonstrated in detail.
The manufacturing method of the film coating material of this invention is a pair of protection which pinches | interposes the coating film which consists of the liquid A on the elongate base material in the width direction orthogonal to the longitudinal direction of the said base material, and the said coating film And a coating film made of the ear liquid B. In particular, in the present invention, on the base material, either one of the liquid A and the protective ear liquid B is applied to provide a coating film, and the viscosity of the coating film at a shear rate of 10 ⁻² sec ⁻¹ is provided. While it is 10,000 mPa · s or less, it is configured by providing a step of applying the other liquid so as to be in contact with the end of the coating film in the width direction, and drying the coating film as necessary. Other processes such as a process and a film coating material winding process can be further provided.

  In this specification, the “width” and “center” of a coating film, a long film coating material, and a long base material provided on a long base material are defined as follows. That is, “width” means the length of the coating film, the film coating material or the base material in a direction perpendicular to the longitudinal direction of the long base material, and “center” means the long base material. The center of the coating film, the film coating material, or the base material in a direction orthogonal to the longitudinal direction of the substrate or an area portion having a predetermined distance in the width direction from the center.

  In the present invention, the film coating material comprises a coating film made of liquid A in a width direction orthogonal to the longitudinal direction of the substrate and a pair of protective ear liquids sandwiching the coating film on a long substrate. And a coating film made of B. This is, for example, a configuration in which a long coating film b, a coating film a, and a coating film b are arranged in this order in the width direction on the substrate.

In the manufacturing method of the film coating material of the present invention, when the liquid A is applied first and then the protective otic liquid B is applied later, for example, on the long base material, near the center of the base material. The liquid A is applied in the longitudinal direction in the longitudinal direction of the base material to provide the coating film a, and before the coating film a is dried, the protective ear solution B is applied without gaps between the both ends in the width direction of the coating film a. A coating film b is provided.
In this case, both ends of the coating film a are ends facing the coating film b, and the coating film a and the coating film b are continuous.

On the other hand, when the liquid A is applied after the protective otic liquid B is first applied, for example, a long shape is formed on a long base material in a region having a predetermined width from both ends in the width direction of the base material. A protective ear solution B is applied to each other to provide a pair of coating films b. Before drying the coating films b, the liquid is applied between the pair of coating films b, that is, near the center of the substrate without any gaps between the coating films b. A is applied.
Also in this case, both ends of the coating film a are end portions facing the coating film b, and the coating film a and the coating film b are continuous.

  Hereinafter, the present invention will be described in detail by taking as an example the case where the liquid A is applied first and then the protective ear liquid B is applied.

In order to provide the liquid A and the protective otic liquid B in contact with each other without any gap, after the liquid A is applied and the coating film a is provided, the viscosity of the coating film a at a shear rate of 10 ⁻² sec ⁻¹ is obtained. While it is 10,000 mPa · s or less, it is necessary to apply the protective otic fluid B.
While the viscosity of the coating film a at a shear rate of 10 ⁻² sec ⁻¹ is 10,000 mPa · s or less, the liquid A is dried by applying the protective otic liquid B to both ends of the coating film a without gaps. Since the protective ear liquid B is applied before, the film thicknesses of the coating film a and the coating film b can be leveled. As a result, it is possible to suppress the thick coating state of the coating film b that occurs after application of the protective otic solution B (for example, during drying), and the winding roll has a gentle step between the coating film a and the coating film b. Can be obtained.
When the protective otic fluid B is applied after the viscosity at the shear rate of 10 ⁻² sec ⁻¹ of the coating film a exceeds 10,000 mPa · s, the protective otic fluid B does not conform to the liquid A, and the coating film a and the coating film When the film coating material is wound into a roll, the step difference from b increases and winding deviation and wrinkle occur, and the roll winding form is poor. In particular, a pressure measurement material using microcapsules is produced. Sometimes the microcapsules in the coating are destroyed.
The viscosity of the coating film a at a shear rate of 10 ⁻² sec ⁻¹ is preferably 8,000 mPa · s or less, and more preferably 5,000 mPa · s or less.
Moreover, it is preferable to apply the liquid A and the protective ear liquid B simultaneously on the substrate. By simultaneous application, the cost of the apparatus used when applying the liquid A and the protective ear liquid B can be reduced, and the production efficiency of the film coating material is improved.

In the present invention, the viscosity at a shear rate of 10 ⁻² sec ⁻¹ of the coating film is a value measured at 25 ° C. using Rheo Stress 600 (manufactured by HAAKE (Germany)), sensor: C35 / 2 Ti.

When the liquid A and the protective otic liquid B are applied on the substrate, the surface tension of the protective otic liquid B is lower than the surface tension of the liquid A, and the difference is preferably within 4 mN / m. If the difference between the surface tension of the liquid A and the surface tension of the protective otic liquid B is within 4 mN / m, the liquid having a low surface tension (protective otic liquid B) has a high surface tension after the application of the protective otic liquid B. It is possible to prevent the so-called liquid approaching approaching the liquid (liquid A) and causing a large change in the coating amount distribution, and the protective ear part (the part of the coating film b of the film coating material). ) Can improve the appearance of the product.
The difference between the surface tension of the liquid A and the surface tension of the protective otic liquid B is more preferably within 2 mN / m.
In the present invention, the surface tension of the liquid A and the surface tension of the protective otic liquid B are values measured at a liquid temperature of 25 ° C. by the Wilhelmy method using a surface tension meter CBVP-A3 manufactured by Kyowa Interface Science Co., Ltd. is there.

Furthermore, in the present invention, the difference between the water content of the liquid A and the water content of the protective ear fluid B is preferably within 10 g / m ² .
If the difference between the water content of the liquid A and the water content of the protective ear fluid B is within 10 g / m ² , a liquid with a high water content (liquid A or protective ear fluid B) is applied after the application of the protective ear fluid B. If you try to make the product including the protective ear part, suppressing the change in the distribution of the coating amount due to the “liquid side” approaching the liquid with low water content (protective ear liquid B or liquid A) Can look good.
The difference between the water content of the liquid A and the water content of the protective ear fluid B is more preferably within 5 g / m ² , and even more preferably within 1 g / m ² .

One of the effects of the present invention is that winding deviation and wrinkle can be suppressed when the long film coating material obtained by the present invention is wound in a roll shape.
In order to further suppress such winding deviation and wrinkle, the film thickness of the coating film b is made larger than the film thickness of the coating film a (the volume standard median diameter of the microcapsules if the coating film a includes microcapsules). It is preferable to increase it by 2 to 10 μm. More preferably, it is 4-6 micrometers. If it is 2 μm or more, when the film coating material is wound in a roll shape, the coating film a can be protected from contact and rubbing due to external pressure, etc. If it is within 10 μm, winding deviation and wrinkle are suppressed. Therefore, the coating film a can be effectively protected.
The film thicknesses of the two coating films b applied to both ends of the coating film a (referred to as Hb ¹ and Hb ² respectively) are Hb ¹ / Hb ² = 0 from the viewpoint of suppressing winding deviation and wrinkling. An error range of .95 to 1.05 is desirable, and the same film thickness (Hb ¹ = Hb ² ) is particularly desirable.

Thus, even if the film thickness of the coating film b is larger than the film thickness of the coating film a, the viscosity of the coating film a at a shear rate of 10 ⁻² sec ⁻¹ is 10, according to the production method of the present invention. By applying the protective ear fluid B without any gap while the pressure is 000 mPa · s or less, the coating film a and the coating film b are continuous, and the product aesthetics can be maintained.

  Furthermore, the width of the protective ear portion, that is, the coating film b, is preferably 1/10 or more of the width of the coating film a in order to obtain the stability of the coating film b. More preferably, it is 1/5 or more of the width of the coating film a.

  The liquid A and the protective ear fluid B may be the same or different in components and composition, and details will be described in the description of the pressure measurement material.

The method for producing a film coating material of the present invention can be applied to any material as long as the object to be produced is a long film coating material, and as described above, a roll type image recording material, For example, it can be preferably used for the production of a pressure measuring material utilizing a color reaction between an electron donating colorless dye precursor and an electron accepting compound.
Hereinafter, the case where the film coating material is the pressure measurement material will be described as an example for the base material, the liquid A, the protective ear fluid B, and the like in the present invention.

<Configuration of pressure measurement material>
The material for pressure measurement (film coating material) that can be used in the present invention includes a microcapsule encapsulating an electron donating colorless dye precursor (hereinafter also referred to as “color former”) and the electron donating colorless dye. An electron-accepting compound (hereinafter also referred to as “developer”) that develops color by reacting with a precursor is provided (preferably coated) on a single substrate or a separate substrate. can do.

  When the pressure measurement material is a so-called mono-sheet type in which microcapsules and an electron-accepting compound are provided on a single base material, the base material such as a sheet or film, and the base material And a developer layer containing a developer and a color former layer containing a microcapsule, which are provided in this order from the substrate side, and are sandwiched between parts where the pressure or pressure distribution is to be measured. Press.

  In the case of the so-called two-sheet type in which the material for pressure measurement is provided by coating the microcapsule and the electron-accepting compound on separate substrates, the color is developed on the substrate such as a sheet or a film. Material C having a developer layer containing a colorant and material D having a colorant layer containing a microcapsule on a substrate such as a sheet or a film, and there is a microcapsule of material D I want to measure the pressure or pressure distribution in a state where the two surfaces are stacked so that the surface (color developer layer surface) of the material C and the surface where the electron accepting compound of material C exists (the surface of the developer layer) face each other. Apply pressure between the parts.

By pressurizing as described above, the microcapsule is broken and the inclusion containing the electron donating colorless dye precursor is released, and the electron donating colorless dye precursor and the electron accepting compound react to color. Is seen. At this time, the inclusion containing the electron-donating colorless dye precursor is released more in response to the pressure applied, and the amount of reaction with the electron-accepting compound increases, so that deep color development is obtained.
Among the above, from the viewpoint of storage stability and handleability, the pressure measurement material is prepared by coating the microcapsules enclosing the electron-donating colorless dye precursor and the electron-accepting compound on separate substrates. It is more preferable that the two-sheet type is provided.

(Base material)
The base material constituting the pressure measurement material (film coating material) may be any of a sheet shape, a film shape, a plate shape, and the like, and specific examples include paper, plastic film, synthetic paper, and the like. It is done. The same is true regardless of whether the pressure measurement material is in the mono-sheet type or the two-sheet type.

Specific examples of the paper include high-quality paper, medium-quality paper, reprint paper, neutral paper, acid paper, recycled paper, coated paper, machine-coated paper, art paper, cast-coated paper, fine-coated paper, and tracing paper. And recycled paper. Specific examples of the plastic film include a polyester film such as a polyethylene terephthalate film, a cellulose derivative film such as cellulose triacetate, a polyolefin film such as polypropylene and polyethylene, and a polystyrene film.
In addition, specific examples of the synthetic paper include polypropylene and polyethylene terephthalate biaxially stretched to form a large number of microvoids (such as Yupo), and those made of synthetic fibers such as polyethylene, polypropylene, polyethylene terephthalate, and polyamide, The thing which laminated | stacked these on a part of paper, one surface, both surfaces, etc. are mentioned. However, the present invention is not limited to these.
Among these, a plastic film and synthetic paper are preferable, and a plastic film is more preferable in that the color density generated by pressurization is higher.

(Electron-donating colorless dye precursor)
The microcapsules contained in the color former layer of the pressure measuring material preferably include at least one electron donating colorless dye precursor.
As the electron-donating colorless dye precursor encapsulated in the microcapsule, a known one can be used for the application of pressure-sensitive copying paper or heat-sensitive recording paper. For example, triphenylmethane phthalide compound, fluorane compound, phenothiazine compound, indolyl phthalide compound, leucooramine compound, rhodamine lactam compound, triphenylmethane compound, diphenylmethane compound, triazene compound, Various compounds such as spiropyran compounds and fluorene compounds can be used.
Details of these compounds are described in JP-A-5-257272, and the electron-donating colorless dye precursor can be used alone or in combination of two or more.

The electron-donating colorless dye precursor enhances color developability at a pressure (preferably surface pressure) of less than 0.1 MPa, and obtains a high concentration at a slight pressure (enhances a concentration change (concentration gradient) with respect to a pressure change). Therefore, those having a high molar extinction coefficient (ε) are preferable. The molar extinction coefficient (ε) of the electron-donating colorless dye precursor is preferably 10000 mol ⁻¹ · cm ⁻¹ · L or more, more preferably 15000 mol ⁻¹ · cm ⁻¹ · L or more, Further, it is preferably 25000 mol ⁻¹ · cm ⁻¹ · L or more.

When the molar extinction coefficient ε is used alone as an electron donating colorless dye precursor in the above range, or when the molar extinction coefficient ε is used in combination of two or more containing an electron donating colorless dye precursor in the above range, The ratio of the electron-donating colorless dye precursor having a molar extinction coefficient ε of 10,000 mol ⁻¹ · cm ⁻¹ · L or more to the total amount of the electron-donating colorless dye precursor increases the color developability caused by pressurization, From the viewpoint of obtaining a high concentration (increasing the concentration change (concentration gradient) with respect to the pressure change), the range of 10 to 100% by mass is preferable, the range of 20 to 100% by mass is more preferable, and the range of 30 to 100% by mass is more preferable. Is preferred.

The molar extinction coefficient (ε) can be calculated from the absorbance when an electron-donating colorless dye is dissolved in a 95% aqueous acetic acid solution. Specifically, in a 95% acetic acid aqueous solution of an electron donating colorless dye whose concentration was adjusted so that the absorbance was 1.0 or less, the length of the measurement cell was Acm, and the concentration of the electron donating colorless dye was Bmol / When L and absorbance are C, it can be calculated by the following formula.
Molar extinction coefficient (ε) = C / (A × B)

The amount of the electron-donating colorless dye precursor (for example, the coating amount) is 0.1 to 5 g / m ² in terms of the mass after drying from the viewpoint of enhancing the color developability at a low pressure (preferably less than 0.1 MPa). Is preferably 0.1 to 4 g / m ² , and more preferably 0.2 to 3 g / m ² .

(solvent)
The microcapsule preferably includes at least one kind of solvent together with the electron donating colorless dye precursor.
As the solvent included in the microcapsule, a known solvent can be used for pressure-sensitive copying paper. For example, alkylnaphthalenes such as diisopropylnaphthalene, diarylalkanes such as 1-phenyl-1-xylylethane, alkylbiphenyls such as isopropylbiphenyl, other triarylmethanes, alkylbenzenes, benzylnaphthalenes, diarylalkylenes, arylindanes Aromatic hydrocarbon such as dibutyl phthalate, aliphatic hydrocarbon such as isoparaffin, soybean oil, corn oil, cottonseed oil, rapeseed oil, olive oil, coconut oil, castor oil, fish oil and other natural animal and vegetable oils or modified oils thereof, minerals Examples include high-boiling fractions of natural products such as oil. You may use a solvent individually by 1 type or in mixture of 2 or more types.

  If necessary, a solvent having a boiling point of 130 ° C. or lower, such as ketones such as methyl ethyl ketone, esters such as ethyl acetate, alcohols such as isopropyl alcohol, and the like can be added as an auxiliary solvent.

(Method for producing microcapsules)
The microcapsules encapsulating the electron-donating colorless dye precursor are produced by any method known per se, such as an interfacial polymerization method, an internal polymerization method, a phase separation method, an external polymerization method, or a coacervation method. be able to.

  The wall material of the microcapsule is particularly limited from the water-insoluble and oil-insoluble polymers conventionally used as the wall material of the microcapsule containing the electron donating colorless dye precursor of the pressure-sensitive recording material. Can be used without Among these, urethane / urea resin (polyurethane / urea), melamine / formaldehyde resin, and gelatin are preferable as the wall material. From the viewpoint of obtaining good color at low pressure (preferably less than 0.1 MPa), polyurethane / urea, melamine / Formaldehyde resin is more preferable, and polyurethane / urea is particularly preferable.

Here, a case where polyurethane / urea is used will be described as an example.
The preparation of a dispersion of polyurethane-urea wall microcapsules encapsulating an electron-donating colorless dye precursor can be carried out using a known method in pressure-sensitive copying paper applications. For example, a solution (oil phase) obtained by dissolving an electron-donating colorless dye precursor and a polyvalent isocyanate in a solvent is used as a hydrophilic solution (for example, a capsule wall-forming substance such as a polyol or polyamine). There is a method of emulsifying and dispersing in water or the like; aqueous phase), and coating the oil droplets in the obtained emulsified dispersion with polyurethane / urea to form microcapsules. At this time, by heating, the polymer formation reaction proceeds at the oil droplet interface, and the microcapsule wall can be formed.

  During the process of microencapsulation, a reaction modifier such as a polyvalent hydroxy compound and a polyvalent amine may be added. Specific examples of the polyvalent hydroxy compound include aliphatic or aromatic polyhydric alcohols, hydroxy polyesters, hydroxy polyalkylene ethers, alkylene oxide adducts of polyvalent amines, and the like. Among them, aliphatic or aromatic polyhydric alcohols and alkylene oxide adducts of polyvalent amines are preferable, and alkylene oxide adducts of polyvalent amines are more preferable.

Any polyvalent amine may be used as long as it has _two or more —NH groups or —NH ₂ groups in the molecule. Specific examples of the compound include aliphatic polyamines such as diethylenetriamine, triethylenetetramine, 1,3-propylenediamine, and hexamethylenediamine; epoxy compound adducts of aliphatic polyamines; alicyclic compounds such as piperazine Examples include polyvalent amines; heterocyclic diamines such as 3,9-bis-aminopropyl-2,4,8,10-tetraoxaspiro- (5,5) undecane, and the like.

  The amount of polyhydric hydroxy compound or polyamine added is appropriately determined depending on the type and amount of polyisocyanate used and the desired capsule membrane hardness. In the case of adding a polyvalent hydroxy compound or a polyvalent amine, the ratio (mass ratio) of “total amount of polyvalent hydroxy compound and / or polyvalent amine: amount of polyvalent isocyanate” is 0.1: 99.9-30. : 70 is preferable, and 1:99 to 25:75 is more preferable. Further, the addition amount of the polyvalent hydroxy compound is preferably 99.9: 0.1 to 70:30, and 99: 1 to 75:25 in terms of mass ratio of polyvalent isocyanate: polyvalent hydroxy compound. More preferably, it is more preferably 98: 2 to 80:20.

  The addition timing of the polyvalent hydroxy compound or polyvalent amine may be added in advance to the solvent or auxiliary solvent for dissolving the electron donating colorless dye precursor, or may be added before or after emulsification dispersion. Good.

  In the hydrophilic solution, as an emulsifier, various amphoteric polymers, ionic polymers, nonionic polymers such as gelatin, starch, carboxymethyl cellulose, polyvinyl alcohol, polyalkylbenzene sulfonate, polyoxyethylene sulfate, A polyoxyalkyl ether, a modified product thereof, an isobutylene-maleic anhydride copolymer, or the like may be added.

  As the polyvalent isocyanate, those known for pressure-sensitive copying paper can be used. For example, an isocyanurate of hydrogenated xylylene diisocyanate (generally referred to as hydrogenated XDI), an isocyanurate of isophorone diisocyanate (generally referred to as IPDI), 4,4'-diphenylmethane diisocyanate, hexamethylene diisocyanate and trimethylene Adducts with methylolpropane, hexamethylene diisocyanate burette, hexamethylene diisocyanate isocyanurate, hexamethylene diisocyanate isocyanurate compound bonded with aliphatic diol (eg, alkylene diol) by urethane bond, polymethylene poly Phenyl isocyanate, carbodiimide-modified diphenylmethane diisocyanate, adduct of tolylene diisocyanate and trimethylol propane, xylylene di Adduct of socyanate and trimethylolpropane, isocyanurate of tolylene diisocyanate, adduct of hydrogenated xylylene diisocyanate and trimethylol propane, adduct of isophorone diisocyanate and trimethylol propane, xylylene diisocyanate And a tris- (p-isocyanatophenyl) thiophosphite. Polyvalent isocyanate can be used individually by 1 type or in mixture of 2 or more types.

  In addition to the above electron-donating colorless dye precursor, solvent, and auxiliary solvent, the microcapsule may contain an additive as necessary. Examples of the additive include an ultraviolet absorber, a light stabilizer, an antioxidant, a wax, and an odor inhibitor.

  The mass ratio between the solvent encapsulated in the microcapsule and the electron donating dye precursor (solvent: precursor) is preferably in the range of 98: 2 to 30:70, and 97: 3 to 40 in terms of color developability. : 60 is more preferable, and 95: 5 to 50:50 is more preferable.

The volume standard median diameter of the microcapsules is in a state where the developer sheet obtained by coating and drying is brought into contact with the electron-donating colorless dye sheet, in terms of the balance between the applied pressure and the density developed at that time, 1-100 micrometers is preferable, 5-70 micrometers is more preferable, and 10-40 micrometers is especially preferable. The median diameter of the volume standard is equivalent to the ratio of the volume of the particles on the large diameter side and the small diameter side when the microcapsule particles are divided into two with the particle diameter at which the cumulative volume is 50% as a threshold value. a diameter ^{D 50.}
The median diameter of the volume standard is calculated by applying a microcapsule solution to a support, photographing the surface with an optical microscope at a magnification of 150 times, and measuring the size of all microcapsules in the range of 2 cm × 2 cm. Is the value to be

  The wall thickness of the capsule wall of the microcapsule depends on various conditions such as the type of capsule wall material and the capsule diameter, but as long as it can be broken by pressurization at a low pressure (preferably 0.1 MPa or less). It can be arbitrarily selected without limitation. Among these, from the viewpoint of obtaining good color developability at a low pressure of 0.1 MPa or less, the preferable wall thickness is in the range of 0.005 to 2.0 μm, and more preferably, the median diameter of the microcapsules is 10 to 40 μm In this case, the thickness is 0.05 to 0.30 μm. The wall thickness of the capsule wall is particularly preferably 0.07 to 0.27 μm when the capsule wall of a microcapsule having a median diameter of 10 to 40 μm is made of polyurethane urea.

Further, the microcapsules encapsulating the electron-donating colorless dye precursor are represented by the following formula 1 from the viewpoint of forming a coloring system that easily develops color even under pressure in a low pressure region (preferably a pressure region of 0.1 MPa or less). It is preferable to satisfy the relationship. In the following formula 1, δ represents the number average wall thickness (μm) of the macrocapsules, and D represents the median diameter (μm) of the volume standard of the microcapsules.
1.0 × 10 ⁻³ ≦ δ / D ≦ 2.5 × 10 ⁻² Formula 1
Here, the wall thickness refers to the thickness of a resin film (so-called capsule wall) that forms capsule particles of microcapsules, and the number average wall thickness (μm) refers to the thickness of individual capsule walls of five microcapsules. Is an average value obtained by averaging with a scanning electron microscope.

In the range of the δ / D value, the δ / D value is 1.0 × 10 ⁻³ to 1 in that a good color (coloring) is obtained in a low pressure region (preferably a pressure region of 0.1 MPa or less). .5 × 10 ⁻² is preferred.

  In particular, the electron-donating colorless dye precursor, which is one of the color forming components, is encapsulated in microcapsules, and the number of microcapsules of (A + 5) μm or more when the volume standard median diameter is Aμm. Is preferably 5000 to 30000 per 2 cm × 2 cm. More preferably, it is a case where 7000-28000 exists. As a result, among the microcapsules encapsulating the electron-donating colorless dye precursor, a predetermined amount of a large size that is equal to or larger than a predetermined diameter is selectively present in a predetermined area, so that a density that can be read by visual inspection or scanning is obtained. Therefore, the density reproduction accuracy when reading the density by scanning or the like can be further increased.

(Preparation of preparation solution for color former layer formation)
The microcapsules can be obtained as a dispersion liquid as described above. The microcapsule dispersion liquid is a preparation liquid (particularly a coating liquid) for forming a color former layer containing an electron donating colorless dye precursor as it is. It is good. Further, the microcapsule dispersion obtained as described above is further added with a starch or starch derivative fine powder, a buffer such as cellulose fiber powder, a water-soluble polymer binder such as polyvinyl alcohol, a vinyl acetate, an acrylic. System, hydrophobic polymer binders such as styrene / butadiene copolymer latex, fluorescent brighteners, antifoaming agents, penetrating agents, UV absorbers, preservatives, and other preparations (especially coating solutions) Good.
The prepared liquid (particularly the coating liquid) thus obtained is applied on a substrate by coating or the like, and dried to form a color former layer constituting the pressure measuring material. .

  When the preparation liquid for forming the color former layer is used as a coating liquid, the coating method of the coating liquid can be performed by applying and drying using a normal coating machine. Specific examples of the coating machine include an air knife coater, a rod coater, a bar coater, a curtain coater, a gravure coater, an extrusion coater, a die coater, a slide bead coater, and a blade coater.

  When the pressure measurement material is a two-sheet type in which the electron-donating colorless dye precursor-encapsulated microcapsules and the electron-accepting compound are coated on separate substrates, for example, the coating solution A sheet material on which at least a color former layer is formed can be obtained by coating directly on a desired sheet-like substrate or through another layer and drying. In addition, in the case of a mono-sheet type configured by coating the electron-donating colorless dye precursor encapsulated microcapsules and the electron-accepting compound on a single sheet-like substrate, for example, on a desired substrate The above-mentioned coating solution is applied on the formed developer layer described later, and dried to obtain a pressure measurement material.

(Electron-accepting compound)
The developer layer constituting the pressure measuring material preferably contains at least one electron accepting compound (developer).
Examples of the electron-accepting compound suitably used for the developer layer include inorganic compounds and organic compounds. Specific examples of the inorganic compound include acidic clay, activated clay, attapulgite, zeolite, bentonite, and clay materials such as kaolin. Examples of the organic compound include metal salts of aromatic carboxylic acids, phenol formaldehyde resins, metal salts of carboxylated temperphenol resins, and the like. Among them, acid clay, activated clay, zeolite, kaolin, metal salt of aromatic carboxylic acid, metal salt of carboxylated temperphenol resin are preferable, and acid clay, activated clay, kaolin, metal salt of aromatic carboxylic acid More preferred.

  Preferable specific examples of the metal salt of the aromatic carboxylic acid include 3,5-di-t-butylsalicylic acid, 3,5-di-t-octylsalicylic acid, 3,5-di-t-nonylsalicylic acid, 3, 5-di-t-dodecylsalicylic acid, 3-methyl-5-t-dodecylsalicylic acid, 3-t-dodecylsalicylic acid, 5-t-dodecylsalicylic acid, 5-cyclohexylsalicylic acid, 3,5-bis (α, α-dimethyl) Benzyl) salicylic acid, 3-methyl-5- (α-methylbenzyl) salicylic acid, 3- (α, α-dimethylbenzyl) -5-methylsalicylic acid, 3- (α, α-dimethylbenzyl) -6-methylsalicylic acid, 3- (α-methylbenzyl) -5- (α, α-dimethylbenzyl) salicylic acid, 3- (α, α-dimethylbenzyl) -6-ethylsalicylic acid, 3-phenyl Zinc salts, nickel salts such as 5- (α, α-dimethylbenzyl) salicylic acid, carboxy-modified terpene phenol resin, salicylic acid resin which is a reaction product of 3,5-bis (α-methylbenzyl) salicylic acid and benzyl chloride , Aluminum salts, calcium salts and the like.

(Preparation of developer dispersion)
When the electron-accepting compound is the above-described inorganic compound, the developer dispersion can be prepared by mechanically dispersing the inorganic compound in an aqueous system, and the electron-accepting compound is an organic compound. In this case, the organic compound can be prepared by mechanically dispersing in an aqueous system or dissolving it in an organic solvent.
For details, the method described in JP-A-8-207435 can be referred to.

(Preparation of the developer for forming the developer layer)
The electron-accepting compound dispersion liquid prepared as described above may be used as a preparation liquid (particularly a coating liquid) for forming a developer layer containing an electron-accepting compound as it is. In addition, a preparation liquid (particularly a coating liquid) for forming a developer layer includes, as a binder, a styrene-butadiene copolymer latex, a vinyl acetate latex, an acrylate latex, polyvinyl alcohol, polyacrylic acid, Synthetic or natural polymer substances such as maleic anhydride-styrene-copolymer, starch, casein, gum arabic, gelatin, carboxymethylcellulose, methylcellulose and the like may be added. Further, as pigments, kaolin, calcined kaolin, kaolin aggregate, heavy calcium carbonate, light calcium carbonate in various forms (rice granular, square, spindle-shaped, rugged, spherical, aragonite columnar, amorphous, etc.), Talc, rutile type or anatase type titanium dioxide or the like may be added. Furthermore, if desired, an optical brightener, an antifoaming agent, a penetrating agent, and an antiseptic can be added.

  When the developer for forming the developer layer is used as a coating solution, the coating solution can be applied and dried using a normal coating machine. Specific examples of the coating machine include a blade coater, a rod coater, an air knife coater, a curtain coater, a gravure coater, a bar coater, a roll coater, an extrusion coater, and a blade coater.

  In the case where the pressure measurement material is a two-sheet type in which the electron-donating colorless dye precursor-encapsulated microcapsules and the electron-accepting compound are coated on separate substrates, for example, a developer is contained. The coating material is applied onto a desired sheet-like base material directly or via another layer and dried to obtain a sheet material on which at least a developer layer is formed. In addition, in the case of a monosheet type in which a microcapsule encapsulating an electron-donating colorless dye precursor and an electron-accepting compound are coated on a single sheet-like substrate, for example, a desired sheet-like substrate The developer layer constituting the pressure measurement material can be formed by applying a developer-containing coating solution directly or via another layer and drying the coating solution.

The amount of the electron-accepting compound (developer) in the developer layer (in the case of coating, the coating amount) is preferably 0.1 to 30 g / m ² in terms of the mass after drying, more preferably the inorganic compound. case is 3 to 20 g / ^{m 2,} in the case of the organic compound is 0.1-5 g / ^{m 2,} more preferably, in the case of the inorganic compound is 5 to 15 g / ^{m 2,} in the case of organic compounds 0.2 to 3 g / m ² .

<Liquid A, Protective Ear Fluid B>
The method for producing a film coating material according to the present invention is such that when a long film coating material such as a pressure measurement material is stored and transported in the form of a roll, the portion used as the product of the film coating material is a product. It is suitable for producing a film coating material that is not damaged as a product by contact and rubbing with each other.
In the pressure measurement material using the color-forming reaction between the electron donating colorless dye precursor and the electron accepting compound described above, the “part used as a product of the film coating material” A color former layer or a developer layer is provided for pressure measurement, and the color former layer is provided even when the pressure measurement material is rolled up by attaching a protective ear to the layer. And the developer layer can be protected.

“Liquid A” in the present invention is a coating solution for pressure measurement material, a coating solution for thermal recording, a coating solution for pressure sensitive recording, a photographic photosensitive coating solution, a magnetic coating solution, a surface protection solution, an antistatic solution, and a lubricant. Coating liquid, color filter pigment liquid, optical compensation sheet coating liquid, antireflection film coating liquid, antiglare-providing liquid magnetic coating liquid, viewing angle widening coating liquid and the like can be included, but are not limited thereto. . In the preparation of a pressure measurement material using a color development reaction between an electron-donating colorless dye precursor and an electron-accepting compound, a preparation liquid for forming a color former layer as “liquid A”, that is, an electron-donating property A coating solution containing microcapsules enclosing a colorless dye precursor can be used. Further, a preparation liquid for forming a color developer layer containing a color developer that develops an electron donating colorless dye precursor can also be used as “liquid A” in the present invention.
Further, as the liquid A, a color developer layer or a color developer layer was provided on a pressure measurement material substrate as a liquid for forming a color developer layer or a liquid for forming a color developer layer. In some cases, the color former layer and the developer layer are the “coating film a” as referred to in the present invention.

  In the present invention, the “protective ear” mainly protects the coating film “a” of the film coating material from contact and rubbing as described above, and rolls the film coating material when wound into a roll. It is for preventing wrinkles, and can be obtained as a coating film b by applying a protective ear solution B to both ends of the coating film a. Therefore, in the pressure measuring material, the protective ear solution B can be applied to both ends of the color former layer or the developer layer as the coating film a to provide the coating film b, that is, the protective ear.

  As described above, the liquid A and the protective ear fluid B may be composed of the same components and compositions. Further, the liquid A and the protective otic liquid B may be composed of different components / compositions, and as the protective otic liquid B, for example, a liquid containing inorganic particles such as pigments or a resin component may be used.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples unless it exceeds the gist thereof. Unless otherwise specified, “part” is based on mass.
Example 1
-Preparation of electron-donating colorless dye sheet (1)-
[Preparation of electron-donating colorless dye precursor capsule (S)]
9 parts of the following compound (A) as an electron donating colorless dye precursor was dissolved in 70 parts of diarylethane to obtain a solution E. Next, 0.4 part of an ethylenediamine butylene oxide adduct dissolved in 1 part of methyl ethyl ketone was added to the stirring solution E to obtain a solution F. Further, 2 parts of a trimethylolpropane adduct of tolylene diisocyanate dissolved in 1 part of methyl ethyl ketone was added to the stirring solution F to obtain a solution G. And said solution G was added to the solution which melt | dissolved 6 parts of polyvinyl alcohol in 150 parts of water, and it emulsified and dispersed. 300 parts of water was added to the emulsified liquid after emulsification and dispersion, and the mixture was heated to 70 ° C. with stirring, cooled for 1 hour and then cooled. Further, water was added to adjust the concentration to obtain a microcapsule liquid (S) containing microcapsules encapsulating an electron donating colorless dye precursor having a solid concentration of 18%. The median diameter of the obtained microcapsules based on the volume standard was 20 μm. The median diameter was calculated by applying a microcapsule solution to a desired support, photographing with an optical microscope at a magnification of 150 times, and measuring the size of all the microcapsules in the range of 2 cm × 2 cm.

[Preparation of electron-donating colorless dye precursor capsule (T)]
The electron-donating colorless dye precursor-encapsulated microcapsule liquid (S) was repeatedly subjected to cross-flow filtration using a 25 μm filter, and the electron-donating colorless dye precursor-encapsulated microcapsules of 25 μm or less were removed. Thereafter, water was added to adjust the concentration to obtain an electron-donating colorless dye-containing microcapsule liquid (T) having a solid concentration of 18%.

[Preparation of Protective Ear Fluid B]
75 parts of water, 5 parts of sodium polyacrylate and 100 parts of calcium carbonate were mixed and dispersed with a sand mill, then 15 parts of SBR latex was equivalent to 15 parts of solids, 15 parts of a 1% aqueous solution of carboxymethyl cellulose, and 25% sodium dodecylbenzenesulfonate One part of an aqueous solution was added and mixed, and water was further added to adjust the solid content concentration to 41.5% to prepare a protective ear solution B. The surface tension of the protective otic fluid B was 30 mN / m.
The surface tension of the protective otic fluid B was measured at a liquid temperature of 25 ° C. by the Wilhelmy method using a surface tension meter CBVP-Z manufactured by Kyowa Interface Science Co., Ltd.

Mix 100 parts of electron-donating colorless dye precursor-encapsulated microcapsule liquid (S) and 5 parts of electron-donating colorless dye precursor-encapsulated microcapsule liquid (T), adjust the concentration by adding water, An 11% color former layer forming coating solution (liquid A) was obtained. The surface tension of the coating solution for forming the color former layer (liquid A) was 30 mN / m.
A long polyethylene terephthalate film (base material) having a width of 400 mm is conveyed, a color former layer forming coating liquid (liquid A) is applied on the film, and a coating film a1 is provided. The coating film b1 was provided by being applied so as to be in contact with both ends in the width direction of the coating film a1. Thereafter, the coating film a1 and the coating film b1 were dried to obtain an electron donating colorless dye sheet (1).

The viscosity at the shear rate of 10 ⁻² sec ⁻¹ of the coating film a1 when applying the protective otic liquid B is
It was 7,000 mPa · s.
The viscosity of the coating film a1 at a shear rate of 10 ⁻² sec ⁻¹ was measured at 25 ° C. using RheoStress 600 (manufactured by HAAKE (Germany)).

-Production of developer sheet (1)-
Add 100 parts of 40% sodium hydroxide aqueous solution and 300 parts of water to 100 parts of sulfuric acid-treated activated clay, and disperse with a homogenizer. Further, 50 parts of 10% aqueous sodium salt of casein and 30 parts of styrene-butadiene latex. Was added to prepare a developer-containing liquid containing an electron-accepting compound (developer).

The obtained developer-containing liquid was applied on a 75 μm thick polyethylene terephthalate sheet so that the solid content was 10 g / m ² and dried to form a developer layer. (1) was obtained.
As described above, a two-sheet type pressure measuring material comprising an electron donating colorless dye sheet and a developer sheet was produced.

(Example 2)
In Example 1, a two-sheet type pressure measurement material (in the same manner as in Example 1, except that the color former layer forming coating liquid (liquid A) and the protective ear liquid B were simultaneously applied without any gaps and dried) 2) was obtained.

(Example 3)
An electron donating colorless dye sheet (3) was obtained in the same manner as in Example 1, except that the protective otic liquid B was replaced with the protective otic liquid B3 having the following composition. In Example 3, the coating film obtained by applying the protective otic solution B3 is referred to as b3.

-Composition of protective ear fluid B3-
A protective otic solution B3 was obtained in the same manner as in Example 1 except that 1 part of 25% aqueous solution of sodium dodecylbenzenesulfonate was replaced with 0.9 part in the preparation of the protective otic liquid B of Example 1.
The surface tension of the obtained protective otic fluid B3 was 33 mN / m.

Example 4
An electron donating colorless dye sheet (4) was obtained in the same manner as in Example 1, except that the protective otic liquid B was replaced with the protective otic liquid B4 having the following composition. In Example 4, the coating film obtained by applying the protective otic liquid B4 is referred to as b4.

-Protective ear fluid B4-
75 parts of water, 5 parts of sodium polyacrylate, and 100 parts of calcium carbonate were mixed and dispersed in a sand mill, then SBR latex was equivalent to 10 parts of solid content, 15 parts of a 1% aqueous solution of carboxymethylcellulose, and 25% sodium dodecylbenzenesulfonate One part of an aqueous solution was added and mixed to obtain a protective otic solution B.
The surface tension of the obtained protective otic fluid B4 was 30 mN / m.

(Comparative Example 1)
In Example 1, the edge part of the coating film a1 obtained by applying the color former layer forming coating liquid (liquid A), and the edge part of the pair of coating films b1 obtained by applying the protective ear liquid B The electron-donating colorless dye sheet (5) was prepared in the same manner as in Example 1 except that the color former layer forming coating solution (liquid A) and the protective ear solution B were applied so that the distances of each were 5 mm. Obtained.

(Comparative Example 2)
In Example 1, the protective ear solution B was applied after the viscosity of the coating film a1 obtained by applying the colorant layer forming coating solution (liquid A) was 15,000 mPa · s. In the same manner as in Example 1, an electron donating colorless dye sheet (6) was obtained.

The electron donating colorless dye sheets (1) to (6) obtained as described above all had the following constitution.
Weight after drying of electron donating colorless dye liquid (liquid A) 5.0 g / m ²
Electron donating colorless dye liquid (liquid A) coating width [width of coating film a1] 250 mm
Application width (one side) of protective ear fluid B (including B3 and B4)
[Widths of coating films b1, b3, b4] 25 mm

Hereinafter, the coating film a1 is collectively referred to as “coating film a”, and the coating films b1, b3, and b4 are collectively referred to as “coating film b”.
Table 1 shows the amounts of water, surface tensions, and the like during application of liquid A and protective otic liquid (including protective otic liquids B, B3, and B4) at the time of preparation of electron-donating colorless dye sheets (1) to (6). The difference in the physical property values of the coating film, the viscosity of the coating film a at the time of application of the protective otic solution, and the distance between the edge of the coating film a and the edge of the coating film b ("distance between coating films ab") are shown. .

(Evaluation)
-1. Winding status
The electron donating colorless dye sheets (1) to (6) were wound into a roll shape, and the occurrence of wrinkles on the roll was visually confirmed. The winding condition was evaluated according to the following criteria.
○: Wrinkles were not confirmed.
(Triangle | delta): Although wrinkles generate | occur | produced, they were fine wrinkles.
X: Large wrinkles occurred.

-2. Product beauty
The product aesthetics of the electron-donating colorless dye sheets (1) to (6) were visually confirmed. Product aesthetics were evaluated according to the following criteria.
(Double-circle): The coating film a and the coating film b did not overlap, the clearance gap did not arise, and the liquid side did not arise.
◯: The coating film a and the coating film b did not overlap and no gap was formed, but liquid dipping occurred.
(Triangle | delta): The coating film a and the coating film b overlapped, or the clearance gap produced.
X: A large gap was formed between the coating film a and the coating film b.

  As can be seen from Table 1, when the viscosity of the coating film a is 10,000 mPa · s, the coating with the protective ear liquor without gaps can suppress the generation of wrinkles, and as a result, the coating film a The inside microcapsule was not broken, and the function of the pressure measurement material was not impaired. Moreover, it was excellent in the aesthetics of a product, and was excellent in aesthetics as a product when the protective ear part of the material for pressure measurement was included.

Claims (6)

A film having a coating film made of liquid A and a coating film made of a pair of protective ear liquids B sandwiching the coating film in a width direction perpendicular to the longitudinal direction of the base material on a long base material. A method for manufacturing a coating material,
On the base material, either one of liquid A or protective ear liquid B is applied to provide a coating film, and the viscosity of the coating film at a shear rate of 10 ⁻² sec ⁻¹ is 10,000 mPa · s or less. In the meantime, the manufacturing method of the film | membrane coating material which apply | coats the other liquid so that the edge part in the said width direction of the said coating film may be contact | connected.   The method for producing a film coating material according to claim 1, wherein the liquid A and the liquid B are simultaneously coated on the substrate.   3. The film coating material according to claim 1, wherein the surface tension of the protective otic liquid B is lower than the surface tension of the liquid A, and the difference is within 4 mN / m. Production method. And water content of the liquid A, film Coating according to any one of claims 1 to 3 in which the difference between the water content of said protective ear solution B is equal to or is within 10 g / m ² Material manufacturing method.   The said liquid A is a coating liquid containing the microcapsule which encloses an electron-donating colorless dye precursor, Manufacture of the film | membrane coating material of any one of Claims 1-4 characterized by the above-mentioned. Method.   The method for producing a film coating material according to any one of claims 1 to 5, which is used for producing a pressure measuring material utilizing a color reaction between an electron donating colorless dye precursor and an electron accepting compound. .