WO2010116655A1

WO2010116655A1 - Coating agent and coating device for textile

Info

Publication number: WO2010116655A1
Application number: PCT/JP2010/002178
Authority: WO
Inventors: 岩崎政樹; 佐野健三
Original assignee: 積水化学工業株式会社
Priority date: 2009-04-08
Filing date: 2010-03-26
Publication date: 2010-10-14
Also published as: JPWO2010116655A1

Abstract

A coating agent whereby a highly glossy coating film containing a metal powder is formed on a textile to thereby increase the added value of the textile. A coating agent for coating a textile, which comprises a metal powder, a binder for binding the metal powder to the textile, and a dispersion medium for dispersing the metal powder therein and dissolving the binder therein. The metal powder has a particle diameter of 5 to 24 μm. The standard boiling point of the dispersion medium is preferably 120 to 160^oC. The ratio by weight of the sum of the metal powder and the binder to the dispersion medium is 10:90 to 20:80. The ratio by weight of the metal powder to the binder is 30:70 to 70:30.

Description

Fabric coating agent and coating apparatus

The present invention relates to a coating agent applied to coat a metal powder-containing coating film on a fabric, a coating device for the coating agent, and a fabric coated with the coating agent, in particular, a curtain, a blind, The present invention relates to a coating agent suitable for a cloth for a window shader such as a shade.

Window shades such as curtains, blinds, and shades are well known. These window shaders play an important role as interior as well as the function of adjusting the amount of light extraction and the amount of watermark. Generally, curtains and shades are made of cloth. In addition to a thin resin plate, the material of the blade of the blind is often used as a fabric.

JP 2002-70460 A JP-A-6-88469

When a metal powder-containing coating film is coated on a cloth of a window shader such as a curtain, a blind, or a shade, incident light can be reflected or absorbed, and added value is increased. Examples of the coating method of the metal powder-containing coating include sputtering, spray coating, roll coating, and the like. Sputtering requires a large apparatus and increases costs. In the case of spray coating or roll coating, the component of the coating agent becomes a problem.
In view of the above circumstances, an object of the present invention is to optimize the components of a coating agent when a metal powder-containing coating film is coated on a fabric by coating, and to achieve good adhesion and glossiness.

In order to achieve the above object, the present invention provides a coating agent applied to a fabric, comprising a metal powder, a binder for binding the metal powder to the fabric, the metal powder dispersed, and the binder. And a dispersion solvent for dissolving
The metal powder has a particle size of 5 μm to 24 μm,
The ratio of the total weight (A) of the metal powder and binder and the weight (B) of the dispersion solvent is (A) :( B) = 10: 90 to 20:80,
The weight ratio of the metal powder to the binder is 30:70 to 70:30.
Thereby, the metal powder containing coating film excellent in adhesiveness and glossiness can be coated on the fabric.

The metal powder may be composed of a base metal such as aluminum or zinc, or a noble metal such as gold or silver, and is not limited to a single metal, may be an alloy, or may be oxidized.
The metal powder is preferably made of aluminum. Each particle of the metal powder is preferably an aluminum leaf material. The shape of the metal powder particles such as the aluminum leaf material is not particularly limited, but it is preferable that the peripheral edge is as smooth as possible or a rounded corner triangle (scale shape), and a disk that forms a gently curved partial curved surface More preferably. The shape of the metal powder particles may be a flat disk shape.

By setting the (average) particle size of the metal powder to 5 μm to 24 μm, the gloss of the metal powder-containing coating film can be ensured. When the particle size of the metal powder is less than 5 μm, it is not easy to ensure glossiness, and the material cost increases. When the particle size of the metal powder exceeds 24 μm, it is difficult to obtain sufficient gloss.
The (average) particle size of the metal powder is more preferably 9 μm or more, 10 μm or more, and 20 μm or less. Thereby, favorable glossiness can be obtained.

By making the ratio of the total weight of the metal powder and binder and the weight of the dispersion solvent 10:90 to 20:80, the solubility of the binder in the coating agent and the dispersibility of the metal powder can be ensured, and The gloss of the coating film containing metal powder can be secured. If the total weight of the metal powder and the binder with respect to the total weight of the coating agent is less than 10%, it is not easy to ensure glossiness. When the total weight of the metal powder and the binder with respect to the total weight of the coating agent exceeds 20%, it is not easy to dissolve the binder.
More preferably, the ratio of the total weight of the metal powder and binder to the weight of the dispersion solvent is about 15:85. Thereby, the solubility of a binder and the dispersibility of a metal powder can be ensured, and sufficient glossiness can be obtained.

The metal powder and the binder constitute a solid content in the coating agent.
By setting the weight ratio of the metal powder and the binder in the solid content to 30:70 to 70:30, it is possible to achieve both gloss and adhesion (and thus fastness or scratch resistance). When the weight ratio of the metal powder to the total weight of the metal powder and the binder is less than 30%, or when the weight ratio of the binder is more than 70%, the adhesion (fastness, scratch resistance) is increased but the glossiness is increased. Not enough. When the weight ratio of the metal powder to the total weight of the metal powder and the binder exceeds 70%, or when the weight ratio of the binder is less than 30%, the gloss becomes sufficiently high, but the necessary adhesion (fastness, It becomes difficult to obtain scratch resistance.
The weight ratio of the metal powder to the binder is preferably about 50:50. Thereby, good glossiness can be obtained, and sufficient adhesion (fastness, scratch resistance) can be ensured.

The standard boiling point of the dispersion solvent is preferably 100 ° C. to 180 ° C., more preferably 120 ° C. to 160 ° C.
Thereby, the applicability in spray coating can be ensured, and the drying property after application can be improved. In roll coating, the coating property and drying property can be improved.
In particular, in the case of spray coating, the standard boiling point of the dispersion solvent is preferably 120 ° C to 160 ° C. If the dispersion solvent has a standard boiling point of less than 120 ° C., it is easily vaporized instantaneously after jetting, and the coating agent may be dried before reaching the fabric, making coating difficult. If the dispersion solvent exceeds the standard boiling point of 160 ° C., it is difficult to vaporize and the drying process after coating is not easy.
Examples of the dispersion solvent having a normal boiling point of 120 ° C. to 160 ° C. include butyl acetate and propylene glycol methyl ether acetate (PGMEA). The normal boiling point of butyl acetate is 126 ° C. The standard boiling point of PGMEA is 146 ° C.
The dispersion solvent is more preferably PGMEA. Thereby, in the case of spray coating, the coating agent can be reliably sprayed onto the fabric in an undried state. Thereafter, the binder is solidified, whereby the metal powder can be reliably bonded to the fabric via the binder, and the metal powder-containing coating film can be reliably formed. Dryability after application is also good. Also in roll coating, application property and drying property can be improved by using PGMEA as a dispersion solvent.

As the binder, acrylic resin, urethane resin, melamine resin, epoxy resin, polyester resin, or the like can be used. Preferably, the binder is an acrylic resin. Urethane resin is relatively weak in resistance to rain and ultraviolet rays and has low weather resistance. Melamine resin requires baking.

A spray-type fabric applicator according to the present invention includes a nozzle for injecting the above-described coating agent,
Support means for supporting the fabric so as to face the nozzle;
Moving means for moving the supported fabric relative to the nozzle;
It is provided with.
The coating agent applied to the spray-type fabric coating apparatus preferably uses a solvent having a normal boiling point of 120 ° C. to 160 ° C., more preferably PGMEA, as a dispersion solvent.
The nozzle may be applied by mixing the above-mentioned coating agent with compressed air, or the jet fluid containing the coating agent may form a swirling flow.
The moving means may move the fabric or move the nozzle. When the moving means moves the fabric, the moving means may also serve as the supporting means.

The roll-type fabric applicator according to the present invention includes a container in which the coating agent is stored,
A coating roll in which the lower peripheral surface is immersed in the coating agent in the container;
A pressing roll around which the fabric is wound;
An application thickness adjusting roll which is disposed so as to form a gap with the application roll and which can approach and separate from the application roll;
The pressing roll is pressed against the coating roll with the fabric sandwiched therebetween.
The coating agent is attached to the peripheral surface of the coating roll, introduced between the coating roll and the pressing roll, and applied to the fabric. The coating thickness can be adjusted by the coating thickness adjusting roll.
Even in a roll type fabric applicator, the applicability and drying properties can be improved by using the coating agent.
The coating agent applied to the roll-type fabric coating apparatus is not particularly limited to the standard boiling point of the dispersion solvent.

Furthermore, the fabric according to the present invention is characterized in that the metal powder-containing film containing the metal powder and the binder is coated by applying the fabric coating agent. Thereby, glossiness can be imparted to the fabric and the added value of the fabric can be increased. This fabric can be applied to window shading bodies such as curtains, blinds, and shades. Then, incident light can be sufficiently reflected or absorbed.

According to the present invention, the metal powder-containing coating film having good gloss can be coated on the fabric, and the added value of the fabric can be increased.

1 is a schematic configuration diagram of a spray-type fabric coating apparatus according to a first embodiment of the present invention. It is a schematic block diagram of the roll-type cloth coating device which concerns on 2nd Embodiment of this invention.

Embodiments of the present invention will be described below.
The substrate to be coated of the present embodiment is a cloth (cross) used as a window light shielding body such as a curtain, a blind, or a shade. The material of the fabric is glass fiber extruded and coated with PVC. Polyethylene fiber may be used instead of glass fiber. This material (yarn shape) is woven with a knitting machine and subjected to heat treatment at a temperature close to the melting point of PVC while applying tension with a tenter machine.

A coating agent is applied to the surface of the fabric produced as described above to form a metal powder-containing coating film.
The coating agent contains a solid content and a dispersion solvent. The solid content includes metal powder and a binder (binder). The dispersion solvent dissolves the binder and disperses the metal powder. The dispersion solvent has volatility. When the coating agent is applied to the fabric, the dispersion solvent volatilizes. Thereby, the binder dissolved in the dispersion solvent is solidified. The metal powder and the fabric are bonded through the binder.

The components of the coating agent will be further described in detail.
In this embodiment, an aluminum leaf material is used as the metal powder from the viewpoint of material cost and the like. The aluminum leaf material is fine particles made of aluminum. The particle size of the aluminum leaf material, that is, the metal powder is preferably 5 μm to 24 μm, more preferably 9 μm or more, or 10 μm or more and 20 μm or less. The shape of the aluminum leaf material is preferably a disc shape and may be a flat disc shape, but more preferably a disc shape having a partially curved surface that is gently curved and may be a triangular shape (scale shape) with rounded corners. The peripheral edge of the disk-shaped aluminum leaf material is preferably smooth.

An acrylic resin is used as the binder. The molecular weight of the acrylic resin is not particularly limited and is, for example, about 82,000 to 95,000. The glass transition point of the acrylic resin is not particularly limited, and is, for example, about Tg = 75 ° C. to 85 ° C. An acrylic resin having a molecular weight of about 82,000 to 95,000 and a glass transition point Tg of about 85 ° C. is excellent in gloss, reflectance, and weather resistance. An acrylic resin having a molecular weight of 30000 and a glass transition point Tg = 75 ° C. tends to be slightly inferior in weather resistance to an acrylic resin having a molecular weight of 95000 and a glass transition point Tg = 85 ° C. An acrylic resin having a molecular weight of 82000 and a glass transition point Tg = 105 ° C. tends to cause color dullness.

The weight ratio of the metal powder to the binder is preferably 30:70 to 70:30, more preferably about 50:50.

PGMEA is used as the dispersion solvent. The standard boiling point of PGMEA is 146 ° C.

The ratio of the total weight of the solid content (metal powder and binder) of the coating agent to the weight of the dispersion solvent is preferably 10:90 to 20:80, and more preferably about 15:85.

Furthermore, the coating agent sometimes contains a trace amount of additives. Examples of the additive include a leveling agent, a slip agent, a plasticizer, a thickener, an emulsifier, and a drying agent.

FIG. 1 shows a coating apparatus 1 for applying a coating agent to a fabric.
The coating apparatus 1 includes a fabric conveyance line 10, a lyophilic processing unit 20, a coating agent supply system 30, and a drying unit 50.

The fabric transport line 10 includes a feed roll 11, a buffer roll 12, a drive roll 13, and guide rolls 14-17. The fabric 90 is in the form of a single continuous sheet and is wound around the feeding roll 11. The fabric 90 is unwound from the roll 11, sequentially wound around the buffer roll 12 and the drive roll 13, and further wound around the guide rolls 14 to 17. The fabric 90 between the guide rolls 14 and 15 is supported horizontally. The fabric 90 between the guide rolls 14 and 15 is referred to as a fabric portion 90a. The fabric 90 between the guide rolls 15 and 16 is supported vertically. The fabric 90 between the

rolls

15 and 16 is referred to as a fabric portion 90b. The cloth portion 90 b moves so as to rise from the lower roll 15 toward the upper roll 16. The fabric 90 between the guide rolls 16 and 17 is supported horizontally. The fabric 90 between the guide rolls 16 and 17 is referred to as a fabric portion 90c.
The cloth conveyance line 10 serves not only as a moving means for the cloth 90 but also as a supporting means for supporting the cloth 90.

A lyophilic processing unit 20, a coating agent supply system 30, and a drying unit 50 are sequentially connected to the fabric conveyance line 10 from the upstream side.

The lyophilic processing unit 20 includes a plasma generation unit 21. The plasma generator 21 is disposed between the guide rolls 14 and 15. The lower surface (plasma blowing surface) of the plasma generating unit 21 faces the upper surface of the horizontal cloth portion 90a between the guide rolls 14 and 15. The upper surface of the cloth portion 90a is a surface that should face the outdoors when used as a curtain or a blind.

Although not shown in detail, the plasma generator 21 has a pair of electrodes. An atmospheric pressure plasma discharge is generated by applying an electric field between these electrodes. A lyophilic gas source 22 is connected to the plasma generator 21. The lyophilic process gas source 22 supplies a lyophilic process gas to the plasma generation unit 21. Nitrogen gas (N ₂ ) is used as the lyophilic processing gas. This nitrogen gas is converted into plasma in the plasma generation unit 21. On the lower surface of the plasma generation unit 21, a blow-out port (not shown) for blowing out the plasmaized gas is formed.

The coating agent supply system 30 includes a coating agent supply tank 31 and a coating nozzle 35. The coating agent pa which consists of said suitable component composition is stored in the coating agent supply tank 31. FIG. The coating agent supply tank 31 is provided with a stirrer 31a. The reason why a plurality of coating agent supply tanks 31 are provided (two in the figure) is to allow the coating agent pa to be supplied without interruption. An application agent transfer path 32 extends from the application agent supply tank 31. A pump 32P and a filter 32F are provided in the transfer path 32. The transfer path 32 is connected to the relay tank 33. The relay tank 33 is provided with a stirrer 33a. The coating agent pa can be homogenized by the stirrer 33a. In particular, the metal powder can be uniformly dispersed in the dispersion solvent. An application agent supply path 34 extends from the relay tank 33. The leading end of the supply path 34 is connected to the application nozzle 35. Further, a compressed air supply path 37 extends from the compressed air supply source 36. The leading end of the supply path 37 is connected to the nozzle 35.

The nozzle 35 is disposed inside the coating chamber 40 with the spray axis oriented horizontally. Although detailed illustration is omitted, the nozzle 35 is formed with an air ejection path through which compressed air from the air supply path 37 passes and an application agent discharge path through which the application agent pa from the application agent supply path 34 passes. . The air ejection path is provided with a swirl flow formation mechanism that ejects compressed air as a swirl flow. Due to the ejector effect of the swirling flow of the compressed air, the coating agent pa is discharged from the coating agent discharge passage, and is shredded to form a mist and is caught in the swirling flow of the compressed air. Thereby, the mixed fluid f of the compressed air and the mist-like coating material pa is ejected from the nozzle 35 while turning.

One wall portion 40 a of the coating chamber 40 is along a vertical cloth portion 90 b between the guide rolls 15 and 16. An opening 40c is provided in the wall portion 40a. The tip of the nozzle 35 in the coating chamber 40 faces the cloth portion 90b through the opening 40c.

The distance between the tip of the nozzle 35 and the cloth portion 90b is preferably about 80 mm to 150 mm.
The cloth portion 90 b is supported so as to face the nozzle 35 by the guide rolls 15, 16 and the like of the transport line 10 as the cloth support means. The conveyance line 10 as the cloth moving means moves the cloth portion 90b relative to the nozzle 35 so as to cross the spraying direction of the coating agent. The surface facing the nozzle 35 in the cloth portion 90b is a surface that should face the outdoors when used as a curtain or a blind.

A fan filter unit 41 is provided on the ceiling of the coating chamber 40. A funnel-shaped coating agent recovery device 42 is provided in a portion below the coating nozzle 35 inside the coating chamber 40. A discharge duct 43 is drawn out of the chamber 40 from the side of the coating agent collector 42.

The drying unit 50 is disposed above the horizontal cloth portion 90c between the guide rolls 16 and 17. The drying unit 50 includes an air blower 51, a pre-baking blower (Pre-baking 複数 Blower) 52, and a plurality (three in the figure) of baking blowers (Baking Blower) 53. These

blowers

51, 52, and 53 are arranged in order from the upstream side in the conveyance direction of the cloth portion 90c. The blowout ports of the

blowers

51, 52, 53 are directed downward so as to face the cloth portion 90c.

A method for forming a metal powder-containing coating film on the fabric 90 using the coating apparatus 1 will be described.
The fabric 90 is fed out from the feed roll 11 and hung around the buffer roll 12. The tension and sagging of the fabric 90 can be adjusted by the buffer roll 12.

[Liquidification process]
The fabric 90 that has passed through the buffer roll 12 and the drive roll 13 is passed horizontally under the plasma generation unit 21. Nitrogen gas from the lyophilic treatment gas source 22 is converted into plasma by the plasma generator 21 to generate nitrogen plasma. This nitrogen plasma is sprayed on the cloth portion 90a. Thereby, the surface of the fabric 90 can be made lyophilic.

[Coating process]
Next, the fabric 90 is raised along the coating chamber 40 by the guide roll 15.
The coating agent pa in the coating agent supply tank 31 is sent to the relay tank 33 through the transfer path 32. Further, the coating agent pa in the relay tank 33 is supplied to the nozzle 35 through the supply path 34. Further, the compressed air from the compressed air supply source 36 is supplied to the nozzle 35 via the supply path 37. Thereby, the mixed fluid f of compressed air and the mist-like coating agent pa is ejected from the nozzle 35. This fluid f is sprayed on the cloth portion 90b. By using PGMEA having a standard boiling point of 146 ° C. as a dispersion solvent for the coating agent, the spray fluid f can be reliably reached to the fabric 90 before the coating agent is dried, and the coating agent can be uniformly applied to the fabric 90. .

Part of the coating agent sprayed from the nozzle 35 falls in the coating chamber 40. The coating agent is collected by the coating agent collecting unit 42 and stored at the bottom of the coating chamber 40.
The air blown from the coating nozzle 35 is discharged through the discharge duct 43 at the lower part of the coating chamber 40.
Clean air is introduced into the coating chamber 40 from the fan filter unit 41 at the top of the coating chamber 40. This air is also discharged through the discharge duct 43 below the coating chamber 40. Accordingly, a downward air flow is formed in the coating chamber 40.
The gas in the coating chamber 40 contains a dispersion solvent (PGMEA) vaporized from the coating agent. The vaporized gas of the dispersion solvent is discharged from the discharge duct 43 together with the air.

[Drying process]
Subsequently, the fabric 90 is passed below the drying unit 50. Air is blown from the air blower 51 onto the cloth portion 90c. Next, warm air is blown from the pre-bake blower 52 to the cloth portion 90c, and further hot air is blown from the bake blower 53 to the cloth portion 90c. Thereby, the dispersion | distribution solvent (PGMEA) in the coating agent adhering to the fabric 90 can be vaporized reliably, and a coating agent can be dried reliably. As the dispersion solvent evaporates, the binder made of acrylic resin is solidified. The aluminum leaf material is bonded to the fabric 90 through the solidified binder. Thereby, a metal powder-containing coating film can be formed on the surface of the fabric 90. As described above, in the coating step, the coating agent can be prevented from drying until it reaches the fabric 90 and can be uniformly coated on the fabric 90, so that a uniform metal powder-containing coating film can be formed.

By configuring the coating agent with the above preferred composition, the reflectance, gloss, VOC harmlessness, weather resistance, adhesion (fastness, scratch resistance), etc. of the coating film containing metal powder can be improved. .

Next, another embodiment of the present invention will be described. In the following embodiments, the same contents as those of the above-described embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted.
FIG. 2 shows a roll-type coating apparatus 1A according to the second embodiment of the present invention. The coating apparatus 1A includes a coating roll 60, a pressing roll 61, a coating thickness adjusting roll 62, and a coating agent container 69. A coating agent pa is stored in the container 69. The coating agent pa has the same composition as in the first embodiment. That is, the coating agent pa contains metal powder, a binder, and a dispersion solvent. As the metal powder, an aluminum leaf material having a particle size of 5 μm to 24 μm, preferably 9 μm to 20 μm is used. An acrylic resin is used as the binder. The weight ratio of the metal powder to the binder is 30:70 to 70:30, preferably about 50:50. PGMEA is used as the dispersion solvent. The ratio of the total weight (A) of the solid content (metal powder and binder) of the coating agent to the weight (B) of the dispersion solvent is (A) :( B) = 10: 90 to 20:80, preferably (A) :( B) = about 15:85.

The coating roll 60 is made of metal such as stainless steel. The diameter of the application roll 60 is, for example, about 300 mm. The application roll 60 rotates counterclockwise in FIG. The lower part of the application roll 60 is immersed in the application agent pa in the container 69.

The pressing roll 61 has a roll body 61a made of a metal such as stainless steel, and a rubber cover 61b covering the outer periphery of the roll body 61a. The hardness of the rubber constituting the covering 61b is, for example, about 60 to 70. The pressing roll 61 rotates clockwise in FIG. The diameter of the roll body 61a is, for example, about 300 mm. The thickness of the covering 61b is, for example, about 2 to 5 mm.

The pressing roll 61 is disposed above the application roll 60. The lower peripheral side portion of the pressing roll 61 is opposed to the upper peripheral side portion of the application roll 60. The fabric 90 passes through the atmospheric pressure plasma lyophilic processing unit 20, and further passes through the guide rolls 64 and 65 in order, and is wound around the lower peripheral side portion of the pressing roll 61. A pressing roll 61 is pressed against the application roll 60 with the fabric 90 interposed therebetween. Thereby, the fabric 90 is sandwiched and compressed between the

rolls

60 and 61. The pressing pressure of the pressing roll 61 to the coating roll 60 is preferably 0.1 MPa / cm ² to 1.0 MPa / cm ² .

The coating thickness adjusting roll 62 is made of a metal such as stainless steel. The application thickness adjusting roll 62 rotates counterclockwise in FIG.

The coating thickness adjusting roll 62 is disposed in the vicinity of the peripheral side portion of the coating roll 60. Specifically, the coating thickness adjusting roll 62 is a peripheral side portion of an intermediate portion between a position where the coating roll 60 is immersed in the coating agent pa in the container 69 and a position facing the pressing roll 61 in the rotation direction of the roll 60. Is facing. The coating thickness adjusting roll 62 is disposed away from the liquid surface of the coating agent pa in the container 69. A slight gap g is formed between the coating roll 60 and the coating thickness adjusting roll 62. The position of the coating thickness adjusting roll 62 can be adjusted so as to approach and separate from the coating roll 60. Thereby, the thickness of the gap g can be adjusted. As a result, the application | coating thickness to the fabric 90 of an application agent can be adjusted. The thickness of the gap g is preferably 0.01 mm to 0.1 mm.

The doctor blade (Doctor blade; scraping member) 63 is provided on the peripheral side of the coating thickness adjusting roll 62 opposite to the coating roll 60 side. The tip of the doctor blade 63 is in contact with the coating thickness adjusting roll 62. The application thickness adjusting roll 62 and the doctor blade 63 contact portion are disposed above the container 69.

The operation of the roll type coating apparatus 1A will be described.
The application roll 60 is rotated counterclockwise in FIG. The pressing roll 61 is rotated clockwise in FIG. The coating thickness adjusting roll 62 is rotated counterclockwise in FIG.

The coating agent pa in the container 69 adheres to the lower peripheral surface of the coating roll 60. As the coating roll 60 rotates, the adhered coating agent pa rises together with the coating roll 60. A film m of the coating agent pa is attached to the peripheral surface of the coating roll 60 above the liquid surface of the coating agent pa in the container 69. This coating film m is passed through the gap g. A part of the coating film m is transferred to the peripheral surface of the coating thickness adjusting roll 62. Thereby, the film thickness of the coating film m on the coating roll 60 after passing through the gap g becomes substantially equal to the thickness of the gap g. By adjusting the position of the coating thickness adjusting roll 62 and adjusting the thickness of the gap g, the thickness of the coating film m attached to the peripheral surface above the gap g of the coating roll 60 can be adjusted.

When the coating roll 60 further rotates, the coating film m after the thickness adjustment is introduced between the coating roll 60 and the pressing roll 61.

The fabric 90 is conveyed in the direction of arrow a in FIG. The fabric 90 being conveyed is lyophilicized by the atmospheric pressure plasma lyophilic processing unit 20. The lyophilic fabric 90 is introduced between the coating roll 60 and the pressing roll 61 while passing through the guide rolls 64 and 65 in order and hanging around the pressing roll 61. As a result, the coating agent is transferred from the coating roll 60 to the fabric 90 between the

rolls

60 and 61, and the coating agent is applied to the fabric 90. By using PGMEA as the dispersion solvent, it is possible to suppress drying of the coating agent from the inside of the container 69 until it is applied to the fabric 90. Therefore, the applicability of the coating agent can be reliably ensured.

After the fabric 90 is unwound from the pressing roll 61, it passes through the guide roll 66 and passes through the blower unit 50 to be heated. Thereby, the coating agent on the fabric 90 is dried. By using PGMEA as the dispersion solvent, the coating agent can be easily dried. Thus, the metal powder-containing coating film can be coated on the fabric 90. By configuring the coating agent with the above composition, a metal powder-containing coating film excellent in adhesion, coating property, and glossiness can be obtained.

In the gap g, the coating film m transferred to the coating thickness adjusting roll 62 moves toward the doctor blade 63 as the coating thickness adjusting roll 62 rotates. The coating film m is scraped off by the doctor blade 63 and returned to the container 69.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, butyl acetate may be used in place of PGMEA as the dispersion solvent in the first embodiment. The normal boiling point of butyl acetate is 126 ° C.
The dispersion solvent in the second embodiment is not particularly limited in the normal boiling point, and instead of PGMEA, butyl acetate, methyl isobutyl ketone (MIBK), isopropyl alcohol (IPA), methyl ethyl ketone (methyl ethyl ketone). MEK) or ethyl acetate may be used.
As the binder, urethane resin, melamine resin, epoxy resin, polyester resin, or the like may be used instead of acrylic resin.
The position of the fabric 90 may be fixed by the support means, and the nozzle 35 may be moved. The moving means for moving the nozzle 35 is constituted by, for example, a linear motion mechanism including a linear motion motor or the like, an air cylinder, a hydraulic cylinder, or the like.
The swirl flow forming mechanism of the application nozzle 35 may be omitted.
The cloth of the substrate to be coated is not limited to a window shade such as a curtain, a blind, or a shade, and is not limited to a cloth for an interior, and can be applied to a cloth for various uses.

Examples will be described. The present invention is not limited to the following examples.
In Example 1, the coating agent was sprayed toward the substrate to be coated, and the coating property was evaluated according to the component of the dispersion solvent of the coating agent. An aluminum leaf material was used for the metal powder of the coating agent, and an acrylic resin was used for the binder. As the substrate to be coated, the curtain fabric described in the above embodiment was used (the same applies to the substrate to be coated in other examples).
(1) PGMEA (standard boiling point 146 ° C.)
When PGMEA was used as a dispersion solvent for the coating agent, a uniform coating film could be formed on the fabric. It was confirmed that the coating agent did not dry before spraying after reaching the fabric, but dried after adhering to the fabric.
(2) Butyl acetate (standard boiling point 126 ° C)
When butyl acetate was used as a dispersion solvent for the coating agent, a coating film could be formed on the fabric. It was confirmed that the coating agent was not completely dried (binder was solidified) before reaching the fabric after spraying. However, it seems that the solidification of the binder progressed somewhat before reaching the fabric, and the uniformity of the coating film was inferior compared with the case where PGMEA was used as the dispersion solvent.

(3) As Comparative Example 1, a coating agent having the following compounds as dispersion solvents was used. Other conditions and operations in Comparative Example 1 were the same as those in Example 1.
(3-1) Methyl isobutyl ketone (MIBK) (standard boiling point 116.2 ° C.)
(3-2) Isopropyl alcohol (IPA) (standard boiling point 82.4 ° C)
(3-3) Methyl ethyl ketone (MEK) (standard boiling point 79.6 ° C.)
(3-4) Ethyl acetate (standard boiling point 76.8 ° C)
The dispersion solvents of these comparative examples volatilized instantaneously after injection. For this reason, the coating agent dries before reaching the fabric and cannot be painted.

From the above results, it can be said that the dispersion solvent of the coating agent in spray coating needs to have a standard boiling point of about 120 ° C. or higher. A dispersion solvent having a normal boiling point of 160 ° C. or higher is not easy to dry after coating. Therefore, it can be said that the preferred range of the normal boiling point of the dispersion solvent is 120 ° C. to 160 ° C. Such dispersing solvents include butyl acetate and PGMEA. Of these, PGMEA was found to be preferable.

In Example 2, the coating agent is sprayed onto the cloth of the substrate to be coated by the coating apparatus 1 of the first embodiment (FIG. 1) to form a metal powder-containing coating film, and according to the shape of the metal powder in the coating agent The gloss of the coated film was evaluated. An acrylic resin having a molecular weight of 82000 and a glass transition point of 85 ° C. was used as the binder of the coating agent, and PGMEA was used as the dispersion solvent.
As the metal powder of the coating agent, three types of aluminum leaf materials having different shapes were used. One is (a) a flat disk-shaped aluminum leaf material. The other is (b) a disk-shaped aluminum leaf material having a partially curved surface that is gently curved. The remaining one is (c) a granular aluminum leaf material having a jagged (uneven) edge or surface.
The film having the highest gloss was the coating film of (b) using a disk-shaped aluminum leaf material having a gently curved partial curved surface as a metal powder. Next, the gloss was excellent in the coating film of (a) using a flat disk-shaped aluminum leaf material as a metal powder. (C) The coating film which uses the granular aluminum leaf material whose peripheral edge and the surface became jagged (unevenness) as the metal powder is the coating film which uses the aluminum leaf material of the above (b) and (a) as the metal powder. Compared with glossiness, it was inferior.

In Example 3, the coating agent is sprayed onto the fabric of the substrate to be coated in the coating apparatus 1 of the first embodiment (FIG. 1) to form a metal powder-containing coating film, and the particle size of the metal powder in the coating agent is reduced. The reflectivity and gloss of the corresponding coating film were evaluated. As the metal powder, a disc-shaped aluminum leaf material having a gently curved partial curved surface was used. As the binder, an acrylic resin having a molecular weight of 82000 and a glass transition point of 85 ° C. was used. The weight ratio between the aluminum leaf material and the acrylic resin was 50:50. PGMEA was used as a dispersion solvent. Unless otherwise specified, the weight ratio of the solid content (aluminum leaf material + acrylic resin) and PGMEA was set to solid content: PGMEA = 15: 85.
When the average particle diameter of the aluminum leaf material was 9 μm, the reflectance was 58.2%, and good glossiness was obtained.
When the average particle diameter of the aluminum leaf material was 16 μm, the reflectance was 67.3%, and sufficiently good glossiness was obtained.
When the average particle diameter of the aluminum leaf material was 19 μm, the reflectance was 50.1%, and a slightly good glossiness was obtained.
When the average particle diameter of the aluminum leaf material was 25 μm, the reflectance was 31.3%, and the glossiness was not very good.
Further, when the average particle size of the aluminum leaf material is 9 μm and the weight ratio of the solid content to PGMEA is solid content: PGMEA = 27: 73, the reflectance is 65.6%, and sufficiently good glossiness is obtained. It was.

From the above results, it can be said that the upper limit of the particle size of the aluminum leaf material for obtaining good glossiness is about 24 μm, more preferably about 20 μm. It can be said that the lower limit of the particle size of the aluminum leaf material is about 5 μm, more preferably about 9 to 10 μm in consideration of the manufacturing cost.

Good reflectivity was obtained even when the particle size of the aluminum leaf material was 9 μm and the weight ratio of the solid content to PGMEA was 27:73, but the higher the solid content ratio, the higher the material cost. The case where the particle size is 16 μm and the weight ratio of the solid content to PGMEA is 15:85 is more advantageous in terms of cost.

In Example 4, the coating agent is sprayed onto the fabric of the substrate to be coated by the coating apparatus 1 of the first embodiment (FIG. 1) to form a metal powder-containing coating film, and the solid content in the coating agent and the weight of PGMEA The reflectance and gloss of the coating film according to the ratio were evaluated. As the metal powder in the solid content, a disc-shaped aluminum leaf material having an average particle diameter of 16 μm and a partially curved partial curved surface was used. As a binder in the solid content, an acrylic resin having a molecular weight of 82000 and a glass transition point of 85 ° C. was used. The weight ratio of the aluminum leaf material to the acrylic resin in the solid content was 50:50. PGMEA was used as a dispersion solvent.
When the weight ratio of the solid content (aluminum leaf material + acrylic resin) and PGMEA was solid content: PGMEA = 20: 80, the reflectance was 59.3%.
When the weight ratio of the solid content to PGMEA was solid content: PGMEA = 15: 85, the reflectance was 67.3%.
When the weight ratio of the solid content to PGMEA was solid content: PGMEA = 10: 90, the reflectance was 55.1%.

From the above results, it was confirmed that when the weight ratio of the solid content to PGMEA is about 10:90 to 20:80, good glossiness can be obtained. It was found that the weight ratio of the solid content to PGMEA is more preferably about 15:85.

In Example 5, the coating agent is sprayed onto the cloth of the substrate to be coated in the coating apparatus 1 of the first embodiment (FIG. 1) to form a metal powder-containing coating film, and the solid component ratio in the coating agent is increased. The gloss and scrub evaluation of the corresponding coating film were performed. As the metal powder, a disc-shaped aluminum leaf material having an average particle diameter of 16 μm and a partially curved surface that is gently curved is used. An acrylic resin was used as the binder. PGMEA was used as a dispersion solvent. The weight ratio of the solid content (aluminum leaf material + acrylic resin) and PGMEA was set to solid content: PGMEA = 20: 80.
When the weight ratio of the aluminum leaf material and the acrylic resin was set to aluminum leaf material: acrylic resin = 25: 75, the coating film had good scuffing properties but had insufficient gloss.
When the weight ratio between the aluminum leaf material and the acrylic resin was aluminum leaf material: acrylic resin = 50: 50, sufficiently good glossiness was obtained. Scratchability was inferior to that of aluminum leaf material: acrylic resin = 25: 75, but was in an acceptable range.
From the above results, it can be said that the weight ratio of the metal powder to the binder is preferably about 30:70 to 70:30, and more preferably about 50:50 from the viewpoints of glossiness and scratching.

In Example 6, a coating agent was prepared by combining the component compositions that gave good results in Examples 1 to 5 above. Specifically, a disk-shaped aluminum leaf material having an average particle diameter of 16 μm and a curved surface that is gently curved is used as the metal powder of the coating agent. As the binder, an acrylic resin having a molecular weight of 82000 and a glass transition point of 85 ° C. was used. The weight ratio of the aluminum leaf material to the acrylic resin was aluminum leaf material: acrylic resin = 50: 50. PGMEA was used as the dispersion solvent. The weight ratio of the solid content (aluminum leaf material + acrylic resin) and the dispersion solvent (PGMEA) was solid content: dispersion solvent = 15: 85.
This coating agent was sprayed on the cloth of the substrate to be coated by the coating apparatus 1 to form a coating film containing metal powder.

a) Measurement of reflectance The fabric after coating had a reflectance of 67.3% and had good gloss.

b) Residual odor A VOC (Volatile Organic Compounds) test according to JIS-A-1901 was performed on the fabric after coating. The results are shown in Table 1 below.

Total VOC fabric after coating, elution release rate for a stent coated / m ³ after 1 day, 3 days after 35 [mu] g / m ^3, 7 days after a 12 [mu] g / m ^3, below the 400 [mu] g / m ³ of guideline values significantly.
The above guideline values are based on the “Guidelines for Indoor Air Quality” of the Ministry of Health, Labor and Welfare.

A sample piece was cut from the fabric after coating, and the following evaluation was performed.
c) Weather resistance test The sample piece was subjected to a weather resistance test using a Sunshine Weather-o-Meter. The sample piece was irradiated with a xenon lamp (300 to 450 nm) for 700 hours. And during the irradiation period, the sample was bathed in a water shower every 2 hours for 18 minutes.
As a result, there was no change in the gloss of the sample piece after the test, and there was no fading.
An adhesive tape was applied to the sample piece after the test, and then the adhesive tape was peeled off. The coating film was not transferred to the adhesive tape.

d) Autoclave test Sample pieces were placed in an Autoclave test vessel. The interior of the autoclave test vessel was 121 ° C. and humidity 100%. The test time was 20 minutes.
The sample piece after the test had no change in gloss and did not fade.

e) Hot water immersion test A sample piece was immersed in water in a water tank. The water temperature was adjusted to 80 ° C. The test time was 60 minutes.
The sample piece after the test had no change in gloss and did not fade.

f) Supersaturated steam test A sample piece was placed in a supersaturated steam test vessel. The inside of the container was set to a temperature of 80 ° C. and a humidity of 100%. The test time was 125 hours.
The sample piece after the test had no change in gloss and did not fade.

g) Acid water immersion test 0.1 N HCl, 0.1 N H ₂ SO ₄ and 0.1 N HNO ₃ were prepared. Sample pieces were dipped in each of these acidic solutions. The sample piece was placed vertically and only the lower half was immersed in the acid solution. The immersion time was 8 hours. Thereafter, the sample piece was taken out and washed with water.
Sample pieces soaked in HCl had no change in gloss and did not fade.
The lower half of the sample piece soaked in H ₂ SO ₄ was slightly discolored.
The sample piece soaked in HNO ₃ faded slightly in the lower half.

h) Detergent resistance test As a detergent, household dishwashing detergent (Kao Cucut) and glass cleaner (Johnson glass crew) were prepared. Each of these detergents was applied to each sample piece. After about 8 hours, the detergent was washed off.
In any of the detergents, the gloss of the sample piece after the test was not changed, and there was no fading.

i) Fastness test A fastness test according to JIS-L-0823 was performed on the specimen.
As a result, the dry type was almost second grade, and the wet type was third to fourth grade.

As a comparative example A, the coating apparatus 1 was used, the coating agent of the following component compositions was apply | coated to the fabric, and the coating film containing a metal powder was coated.
Metal powder; disc-shaped aluminum leaf material with an average particle size of 16 μm and a curved surface that is gently curved. Binder; Acrylic resin with a molecular weight of 82000 and a glass transition point of 85 ° C. Weight ratio of aluminum leaf material to acrylic resin; Aluminum leaf material: Acrylic resin = 25: 75
Dispersing solvent; PGMEA
Weight ratio of solid content (aluminum leaf material + acrylic resin) and dispersion solvent (PGMEA); solid content: dispersion solvent = 20: 80

As a comparative example B, the coating apparatus 1 was used, the coating agent of the following component compositions was apply | coated to the fabric, and the coating film containing a metal powder was coated.
Metallic powder: Flat disc-shaped aluminum leaf material with an average particle size of 19 μm Binder; Acrylic resin having a molecular weight of 82000 and a glass transition point of 85 ° C. Weight ratio of aluminum leaf material to acrylic resin; Aluminum leaf material: acrylic resin = 25: 75
Dispersing solvent; PGMEA
Weight ratio of solid content (aluminum leaf material + acrylic resin) and dispersion solvent (PGMEA); solid content: dispersion solvent = 20: 80

Furthermore, as Comparative Example C, a fabric in which a metal film made of an aluminum leaf material was coated by physical vapor deposition (PVD) was prepared.

Sample pieces were cut from the fabrics of Comparative Examples A to C, and the same tests as in d) to i) of Example 6 were performed.
Table 2 summarizes the test results of Example 6 and Comparative Examples A to C. It was confirmed that Example 6 can form a metal powder-containing coating film that is generally better than Comparative Examples A, B, and C. In particular, when compared with a metal film formed by physical vapor deposition (Comparative Example C), the metal-containing coating film of this example shows good results in each test of autoclave, hot water immersion, supersaturated steam, and acidic water immersion. Was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A of FIG. The diameter of the coating roll 60 was 300 mm. The diameter of the pressing roll body 61a was 300 mm. The thickness of the gap g between the

rolls

60 and 62 was set to 0.02 mm. The pressing pressure between the

rolls

60 and 61 was set to 0.5 MPa / cm ² .
As the metal powder, an aluminum leaf material having an average particle size of 9 μm to 16 μm was used. As the binder, the same acrylic resin as in Example 3 was used. The weight ratio between the aluminum leaf material and the acrylic resin was 50:50. PGMEA was used as a dispersion solvent. The weight ratio of the solid content (aluminum leaf material + acrylic resin) and PGMEA was set to solid content: PGMEA = 15: 85.
The reflectance of the cloth after the coating treatment was 65.2%. A sufficiently good gloss was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A. Butyl acetate was used as a dispersion solvent. Other processing conditions and apparatus configuration were the same as in Example 7.
The reflectance of the cloth after the coating treatment was 62.0%. A sufficiently good gloss was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A. Methyl isobutyl ketone (MIBK) was used as a dispersion solvent. Other processing conditions and apparatus configuration were the same as in Example 7.
The reflectance of the cloth after the coating treatment was 55.3%. Good glossiness was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A. The diameter of the coating roll 60 was 150 mm. Isopropyl alcohol (IPA) was used as a dispersion solvent. Other processing conditions and apparatus configuration were the same as in Example 7.
The reflectance of the cloth after the coating treatment was 60.7%. Good glossiness was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A. Methyl ethyl ketone (MEK) was used as a dispersion solvent. Other processing conditions and apparatus configuration were the same as in Example 10. Therefore, the diameter of the coating roll 60 was 150 mm.
The reflectance of the cloth after the coating treatment was 59.4%. Good glossiness was obtained.

The coating film treatment was performed using the roll type coating apparatus 1A. Ethyl acetate was used as a dispersion solvent. Other processing conditions and apparatus configuration were the same as in Example 10. Therefore, the diameter of the coating roll 60 was 150 mm.
The reflectance of the cloth after the coating treatment was 57.9%. Good glossiness was obtained.

[Comparative Example 2]
The coating film treatment was performed with the roll type coating apparatus 1A. As a dispersion solvent, isopropyl alcohol (IPA), methyl ethyl ketone (MEK), and ethyl acetate were used. Other processing conditions and apparatus configuration were the same as in Example 7. Therefore, the diameter of the coating roll 60 was 300 mm.
The reflectivity of the cloth after the coating treatment was less than 35% in any of the dispersion solvents, and the glossiness was not very good. Since the diameter of the coating roll 60 is larger than the standard boiling point of the dispersion solvent, the coating film m is dried after the coating material pa comes out of the liquid surface in the container 69 and is applied to the fabric 90. As a result, the cloth 90 could not be uniformly coated with the metal powder-containing coating film.
As is clear from Examples 10 to 12, when the standard boiling point of the dispersion solvent is low, the coating film m can be formed even with the solvent of Comparative Example 2 by reducing the diameter of the coating roll 60 accordingly. It can be applied before drying and a cloth having good gloss can be obtained.

The present invention is applicable to coating a metal-containing film on a fabric for window interior such as a blind or a curtain.

DESCRIPTION OF SYMBOLS 1 Spray type coating apparatus 1A Roll type coating apparatus 10 Fabric conveyance line (moving means, supporting means)
11 Feed roll 12 Buffer roll 13 Drive roll 14 Guide roll 15 Guide roll 16 Guide roll 17 Guide roll 20 Lipophilic treatment section (atmospheric pressure plasma treatment section)
21 Plasma generator 22 Lipophilic treatment gas (nitrogen) source 30 Coating agent supply system 31 Coating agent supply tank 31a Stirrer 32 Coating agent transfer path 32P Pump 32F Filter 33 Relay tank 33a Stirrer 34 Coating agent supply path 35 Coating nozzle 36 Compressed air supply source (compressor)
37 Compressed air supply path 40 Application chamber 40a Wall portion 40c Opening 41 Fan filter unit 42 Application agent recovery unit 43 Discharge duct 50 Blower unit 51 Air blower 52 Pre-bake blower 53 Bake blower 60 Application roll 61 Pressing roll

61a Roll body

61b Cover body 62 Adjustment roll 63

Doctor blade

64, 65, 66 Guide roll 69 Coating agent container 90 Cloth f Injection fluid g Gap pa Coating agent pg Plasma gas

Claims

A coating applied to a fabric,
Metal powder, a binder that binds the metal powder to the fabric, a dispersion solvent that disperses the metal powder and dissolves the binder,
The metal powder has a particle size of 5 to 24 μm,
The ratio of the total weight (A) of the metal powder and binder and the weight (B) of the dispersion solvent is (A) :( B) = 10: 90 to 20:80,
A fabric coating agent, wherein the weight ratio of the metal powder to the binder is 30:70 to 70:30.
2. The fabric coating agent according to claim 1, wherein the metal powder has a particle size of 9 μm to 20 μm.
The ratio of the total weight (A) of the metal powder and the binder to the weight (B) of the dispersion solvent is (A) :( B) = about 15:85. The coating agent for textiles as described.
The fabric coating agent according to any one of claims 1 to 3, wherein the weight ratio of the metal powder to the binder is about 50:50.
The fabric coating agent according to any one of claims 1 to 4, wherein the binder is an acrylic resin.
The fabric coating agent according to any one of claims 1 to 5, wherein the dispersion solvent has a normal boiling point of 120 ° C to 160 ° C.
The fabric coating agent according to any one of claims 1 to 6, wherein the dispersion solvent is propylene glycol monomethyl ether acetate (hereinafter referred to as "PGMEA").
A nozzle for spraying the coating agent according to claim 6 or 7,
Support means for supporting the fabric so as to face the nozzle;
Moving means for moving the supported fabric relative to the nozzle;
A fabric applicator characterized by comprising:
A container storing the coating agent according to any one of claims 1 to 7,
A coating roll in which the lower peripheral surface is immersed in the coating agent in the container;
A pressing roll around which the fabric is wound;
An application thickness adjusting roll which is disposed so as to form a gap with the application roll and which can approach and separate from the application roll;
The fabric applicator is characterized in that the press roll is pressed against the applicator roll across the fabric.
A fabric characterized in that the metal powder-containing film containing the metal powder and the binder is coated by applying the fabric coating agent according to any one of claims 1 to 7.