JP2019137953A - Fabric and manufacturing method therefor - Google Patents

Abstract

To provide a fabric having excellent antifouling property and fire retardancy, hardly generating scarce water spot, in which fabrics are hardly adhered each other, and a manufacturing method therefor.SOLUTION: The fabric is a polyester fabric in which a fluorine water repellent oil repellent agent is impregnated, having a coating layer on a single surface thereof, the coating layer contains a fluorine-based water repellent and oil repellent agent, an organic phosphorus-based fire retardant having solubility to water at 20°C of 4% or less, and an acrylic resin having glass transition point of -43°C to -20°C.SELECTED DRAWING: None

Description

  The present invention relates to a functional fabric and a method for producing the same. More specifically, the present invention relates to a fabric that has antifouling properties and flame retardancy, is less likely to cause wrinkles, and is less likely to adhere to one another, and a method for manufacturing the same.

  Fabrics used for interiors of vehicles, ships, aircraft, etc. (for example, fabrics used for trim members such as vehicle seats and door linings for automobiles) are required to have flame retardancy, and at the same time, washing and cleaning are required. Since it is difficult, high antifouling properties are required.

  As the antifouling treatment, it is known to coat the surface of the fabric with water / oil repellent coating, and as the flame retardant treatment, it is known to coat the back surface of the fabric with flame retardant.

  Patent Document 1 discloses a fabric in which a fluorine-containing organic compound is attached to at least the surface of the fabric, and a backing resin layer containing a resin, a flame retardant, and a fluorine-based oil repellent is laminated on the back surface of the fabric. Has been.

JP 2017-196831 A

  However, the demand for functional fabrics is increasing year by year, and in addition to flame retardancy and antifouling properties, fabrics that do not easily wrinkle, and fabrics that are easily separated from each other when fabrics are cut and stacked are easy to handle. Is required.

  An object of the present invention is to solve the above-described problems, and to provide a fabric that has excellent antifouling properties and flame retardancy, is less likely to cause wrinkles, and is less likely to adhere to each other, and a method for manufacturing the fabric. Is an issue.

  As a result of repeated studies to solve the above-mentioned problems, the present inventors have found that a coating layer containing a fluorine-based water / oil repellent and a flame retardant is provided on one side of a polyester fabric impregnated with a fluorine-based water / oil repellent. When forming, a flame retardant that is hardly soluble in water is selected, and an acrylic resin having a predetermined glass transition point is selected as the binder resin of the coating layer, thereby succeeding in solving the above problems. Completed the invention.

  That is, the fabric of the present invention is a polyester fabric impregnated with a fluorine-based water and oil repellent, and has a coating layer on one side (preferably the back surface), and the coating layer is a fluorine-based water repellent. Contains an oil repellent, an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4% (4 g / 100 g of water) or less, and an acrylic resin having a glass transition point of −43 ° C. to −20 ° C. It is characterized by that.

When a fabric is coated with a coating composition containing a flame retardant, flame resistance can be imparted to the fabric, but discoloration tends to occur when the fabric is spilled with hot water or water, and the fabric is dry. However, in the present invention, by using an organophosphorus flame retardant having low solubility in water as a flame retardant, a wrinkle is likely to occur. It is possible to provide a fabric that does not easily stick.
In addition, when a fabric is coated with a coating composition containing a water / oil repellent, the coating composition does not sufficiently soak into the fabric, and the coating layer on the fabric surface tends to be thick. For this reason, in the case of cutting 10 to 20 sheets of fabric, it is easy to cause a problem that the fabrics adhere to each other and it takes time to remove the fabric after the cutting. By using an acrylic resin having a point of −43 ° C. to −20 ° C., it is possible to provide a fabric that hardly adheres even during lamination processing.

  Furthermore, it is preferable that the coating layer includes a thermally expandable microcapsule, and the thermally expandable microcapsule protrudes from the surface of the coating layer to form irregularities. By forming irregularities on the surface of the coating layer of the fabric, even when a plurality of fabrics are stacked, the contact area between the fabrics is reduced, so that the fabric and the fabric are more easily separated.

The amount of the coating layer (after drying) is more preferably 70 g / m ² or less per unit area of the fabric.
By setting the amount of the coating layer to 70 g / m ² or less, the adhesion between the fabric and the fabric is reduced, and the fabric and the fabric are more easily separated.

The present invention is also a method suitable for producing the fabric,
(A) a step of immersing the polyester-based fabric in a treatment liquid containing a fluorine-based water / oil repellent and including the treatment liquid, and then drying the cloth;
(B) a step of washing the fabric with warm water or reducing and washing at a temperature of 65 to 90 ° C;
(C) Coating containing a fluorine-based water / oil repellent, an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4% or less, and an acrylic resin having a glass transition point of −43 ° C. to −20 ° C. Coating one side of the fabric with the composition for use,
It is characterized by including.

Further, in the method, the coating composition used in the step (C) includes a thermally expandable microcapsule,
After the step (C), it is preferable that the heat-expandable microcapsules contained in the composition are expanded and protruded from the surface of the coating layer by performing a heat treatment.

  ADVANTAGE OF THE INVENTION According to this invention, it has high flame retardance and antifouling property, and it is hard to produce wrinkles and can provide the manufacturing method of the fabric which is hard to adhere fabrics.

  In the present invention, the degree of “antifouling” is, as shown in the Examples section, the water repellency based on JIS L1092 is 95 or more in the initial stage, and in the salad oil antifouling test described in the Examples section, It is preferable that oil spots do not occur on the front and back surfaces of the fabric and the soft wipe after 24 hours at 83 ° C. The temperature of 83 ° C. is a temperature at which the effect of the fluorine-based water / oil repellent is liable to decrease. However, a fabric that satisfies the above criteria is a fabric even when salad oil is dropped on the surface of the fabric and left at a temperature of 83 ° C. Since oil does not soak into the oil, it is easy to remove even if it is contaminated with food containing oil.

  In the present invention, the degree of “flame retardant” is determined by applying a flame to the fabric for 15 seconds when a test is conducted in accordance with “Flammability of interior materials” defined in the Federal Motor Vehicle Safety Standard (FMVSS). Even if ignited, even if ignited, extinguish by A mark (combustion rate measurement start line) "N" or ignite when flame is applied to the fabric, but after the flame exceeds A mark, It is preferable that the burning rate is 101 mm / min or less. In particular, a fabric that is “N” in the evaluation is preferred.

  Further, in the present invention, as shown in the Examples section, the degree of wrinkling is that 4 mL of distilled water at 80 ° C. is dropped, and after 24 hours, the wrinkle on the surface is grade 4 or higher, and the back surface is wet. It is preferable that the back surface is wrinkled on the fourth grade or higher.

  Further, in the present invention, as shown in the Examples section, the degree of adhesiveness of the fabric is obtained by laminating 20 fabrics and cutting them into a predetermined shape with a laminated automatic cutter (NC cutter). It can be determined by checking whether or not the fabric constituting the cut laminate is attached to the upper and lower fabrics. Specifically, when the laminate is loosened, the number of fabrics adhering to the upper and lower fabrics is preferably less than 10, more preferably 3 or less.

  Moreover, it is preferable that the fabric concerning this invention is a 4th grade or more in both the dry and wet test in the friction fastness test as described in the Example section.

As the base fabric used in the present invention, a polyester fabric is selected because desired flame retardancy is easily achieved.
In the present invention, the polyester-based fabric means a fabric containing polyester fibers, and not only woven fabrics, knitted fabrics and nonwoven fabrics made of polyester fibers alone, but also polyester fibers and other fibers (natural fibers such as cotton and wool, polyamides, Any of a woven or knitted product using a combination of chemical fibers such as rayon and acrylic) may be used. The proportion of the polyester fibers in the constituent fibers of the fabric is preferably 60% by weight or more, more preferably 70% by weight or more, particularly preferably 80% by weight or more, and further preferably 90% by weight or more. A particularly preferable fabric is a fabric made of polyester fiber and having a thickness of 0.2 to 3.0 mm (basis weight 100 to 700 g / m ² ), and particularly a thickness of 0.4 to 2.6 mm (basis weight 200 to 500 g / m ² ).

The base fabric used in the present invention is preferably a polyester fabric impregnated with a fluorine-based water and oil repellent. The fluorine-based water / oil repellent is a compound containing a fluoroalkyl group in which all or part of the hydrogen atoms in the hydrocarbon group are replaced with fluorine atoms. In the present invention, it is particularly preferable to use a polymer containing a monomer having a perfluoroalkyl group. In addition, from the viewpoint of environmental protection and safety, the perfluoroalkyl group is preferably one having 6 carbon atoms. As the fluorine-based water / oil repellent that can be used in the present invention, for example, the fluorine-based water / oil repellent sold under the name Asahi Guard-E from Asahi Glass Co., Ltd. or the name of NK Guard S from Nikka Chemical Co., Ltd. Fluorine-based water and oil repellents that are on the market.
The fluorine-based water / oil repellent used for the dipping treatment of the fabric may be one kind or plural (for example, two to three kinds).

In the present invention, the fabric impregnated with the fluorine-based water / oil repellent means a fabric in which the fluorine-based water / oil repellent is attached not only to the surface of the fabric but also to the internal fibers.
As a method for impregnating a polyester fabric with a fluorine-based water / oil repellent, an immersion treatment called a padding treatment or a dip / nip treatment can be generally used. For example, an aqueous treatment liquid containing 1.0 to 5.0% by weight, more preferably 1.5 to 4.0% by weight of a fluorine-based water and oil repellent (solid content) is prepared. By dipping in the treatment liquid (for example, 2 to 5 minutes) and squeezing with a roller (mangle) or the like, the treatment liquid can be included in the entire fabric, and then dried, not only on the surface of the fabric but also inside the fabric. It is possible to obtain a fabric in which a fluorinated water / oil repellent is also adhered to the fiber (a fabric impregnated with a fluorinated water / oil repellent). Suitable drying conditions are, for example, 110 to 170 ° C, particularly 120 to 160 ° C and about 1 to 5 minutes.
The amount of the first fluorine-based water / oil repellent that is impregnated into the fabric by this antifouling process can be calculated from the concentration and the drawing ratio of the fluorine-based water / oil repellent in the treatment liquid. Included in the fabric after drying, impregnation amount of the first fluorine-containing water- and oil-repellent is per unit area of the ^{fabric, 2.0g / m 2 ~8.0g / m} 2 are suitable, 2.5 g / m ^{2 to} 7.0 g / m ² is more preferable.

In addition, the fabric of the present invention is preferably subjected to a washing (reduction washing or washing with warm water) treatment after the antifouling treatment. In general, reductive cleaning is performed to remove excess dyes that cause color transfer, etc., in textile products dyed at a high dye concentration, and usually in an aqueous solution containing hydrosulfite and sodium hydroxide. In this step, the fiber product is put in and washed at a temperature of around 80 ° C. (for example, 65 to 90 ° C., more preferably 70 to 85 ° C.). However, even if the dyed fabric is dyed at a high dye concentration, even after reduction washing after dyeing, the antifouling process makes it easier for the dye to ooze out from the fabric, so that the friction fastness of the fabric decreases after the antifouling process. (Color transfer is likely to occur). Therefore, in the case of a fabric dyed with a high dye concentration, it is preferable to perform reduction cleaning even after antifouling processing. In addition, although the texture tends to deteriorate (harden) due to the antifouling process, the texture is improved by washing, so that there is no problem of friction fastness (fabric dyed with a low dye concentration), It is preferable to perform a washing treatment after the antifouling treatment. In addition, in the case of the fabric dye | stained with the low dye density | concentration, you may wash | clean with warm water (for example, 65-90 degreeC, More preferably, 70-85 degreeC) instead of reductive washing. In both the reduction cleaning and the warm water cleaning, the cleaning time can be in the range of 1 to 60 minutes, for example, about 15 to 40 minutes.
In addition, it is possible to determine whether to select reduction washing or warm water washing in the washing process after the antifouling process, based on the ease of color migration of the fabric (the fabric dyed with a high dye concentration is likely to undergo color migration). The fabric dyed at a low dye concentration is difficult to transfer). Examples of fabrics dyed with a high dye concentration include fabrics dyed with a dye concentration of about 5% owf or more, such as black, blue, red, purple, dark gray, dark blue, and dark green. Examples of such fabrics include fabrics dyed with a dye concentration of less than about 5% owf, such as white, light gray, beige and cream. More specifically, if the fabric after antifouling has a fastness to friction of 4.0 grade or higher in both dry and wet tests, it can be judged that no reduction cleaning is necessary, and the fabric is less than 4.0 grade. In this case, it can be determined that reduction cleaning is necessary. The measurement of the fastness to friction is in accordance with JIS L0849 (Testing method for fastness to dyeing against friction).

  The drying conditions after the washing are, for example, 110 to 170 ° C., better 120 to 160 ° C., particularly 120 to 130 ° C., and about 1 to 5 minutes.

In the present invention, a coating layer containing a fluorine-based water and oil repellent and a flame retardant is formed on one side (particularly the back side) of the base fabric subjected to the antifouling treatment.
As the fluorine-based water / oil repellent contained in the coating layer, those mentioned above as the fluorine-based water / oil repellent that can be used in the antifouling process can be used, and the fluorine-based water repellent used in the antifouling process. The same oil repellent agent may be used, different ones may be used, only one type may be used, or a plurality of types may be used in combination.

  As the flame retardant contained in the coating layer, an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4% (4 g / 100 g of water) or less is preferable. By using such a flame retardant, the fabric is less likely to be wrinkled even after the coating layer is formed. Examples of the organic phosphorus flame retardant include a flame retardant selected from the group consisting of phosphonic acid esters, phosphoric acid amides, phosphoric acid ester amides, aromatic phosphoric acid esters, halogen-containing phosphoric acid esters, and the like. It is done. As an example of a preferable organic phosphorus flame retardant, a phosphonic acid ester flame retardant and / or melamine phosphate may be mentioned.

  The coating layer may include a thermally expandable microcapsule. Thermally expandable microcapsules are usually composed of an outer shell (shell) made of a thermoplastic resin and a volatile liquid (usually low-boiling liquid hydrocarbons such as isobutane and isopentane) contained therein. By heating, the thermoplastic resin constituting the outer shell is softened, the liquid contained therein is volatilized, the internal pressure is increased, and the microcapsule expands (becomes a balloon). Basically, microcapsules do not rupture and their weight is the same before and after expansion. As such thermally expandable microcapsules, commercially available products can be used, for example, those sold under the name Matsumoto Microsphere from Matsumoto Yushi Seiyaku Co., Ltd. can be used.

  An unexpanded microcapsule is added to the composition forming the coating layer of the present invention, and the microcapsule is expanded by applying heat treatment after coating the composition on the fabric, so that the surface of the coating layer is expanded. An uneven surface can be formed by projecting a part of the microcapsule. Accordingly, even when a plurality of fabrics are stacked and cut after forming a coating layer on the fabrics, the contact area between the fabrics becomes small, so that the fabrics hardly adhere to each other.

As the microcapsules, the average particle diameter when not expanded is equal to or less than the coating thickness when forming the coating layer (thickness before volatilizing the solvent), and the average particle diameter after expansion is the thickness of the coating layer (after solvent volatilization) It is more preferable to select a microcapsule that is 20 μm or more (especially 30 μm or more) larger than (thickness). By selecting thermally expandable microcapsules having such an average particle size, coating becomes easy and tack (adhesion / adhesiveness) can be sufficiently suppressed.
Whether the average particle diameter after expansion is 20 μm or more larger than the thickness of the coating layer is, for example, the thickness of the coating layer (after solvent volatilization) formed using a composition that does not contain thermally expandable microcapsules, It can be judged from the average particle diameter (or coefficient of thermal expansion) after expansion described in the product description of the thermally expandable microcapsule. Usually, since the coefficient of thermal expansion varies depending on the heating temperature, it is also possible to control the average particle diameter after thermal expansion by adjusting the heating temperature.

The average particle diameter of the microcapsules used in the present invention when not expanded and after expansion varies depending on the coating thickness when forming the coating layer and the thickness of the coating layer after drying. The average particle diameter is preferably 5 to 25 μm, more preferably 8 to 22 μm, and particularly preferably 10 to 20 μm.
The microcapsules preferably have an average particle size of 30 μm or more after expansion, more preferably 35 μm or more, and particularly preferably 40 μm or more. The upper limit of the average particle diameter after expansion is suitably 80 μm or less, more preferably 70 μm or less.

Further, the content of the fluorine-based water / oil repellent contained in the coating layer is preferably 0.5 to 4.0 g / m ^2, more preferably 0.7 to 3.5 g / m ² per unit area of the fabric. 1.0 to 3.0 g / m ² is particularly preferable. The content of the flame retardant contained in the coating layer is preferably 25 to 60 g / m ² , more preferably 28 to 55 g / m ² , and particularly preferably 30 to 50 g / m ² per unit area of the fabric.

The content of the heat-expandable microcapsule contained in the coating layer is preferably 1.5 to 4.0 g / m ² , more preferably 1.8 to 3.5 g / m ² per unit area of the fabric. 2.0 to 3.0 g / m ² is particularly preferable.

The total amount of the fluorine-based water / oil repellent impregnated in the fabric and the fluorine-based water / oil repellent contained in the coating layer is 2.5 to 10.0 g / m ² per unit area of the fabric. it is preferred, more preferably 3.0~9.5g / m ^2, and particularly preferably 3.5~9.0g / m ^2.

The coating layer according to the present invention contains an acrylic resin having a glass transition point of −43 ° C. to −20 ° C. as a binder resin for attaching (fixing) a fluorine-based water / oil repellent or flame retardant to a fabric. By using an acrylic resin having a glass transition point higher than −43 ° C. as the binder resin, it becomes difficult for fabrics to adhere to each other even after forming a coating layer, and an acrylic resin having a glass transition point lower than −20 ° C. By using the resin, the texture of the fabric can be kept soft. A more preferable acrylic resin is an acrylic resin having a glass transition point of −41 ° C. to −30 ° C.
As such an acrylic resin, what is generally marketed as an acrylic resin for coating can be used, for example, an acrylic resin sold under the trade name Mobile 7400 from Japan Coating Resin Co., Ltd. An acrylic resin sold as a new brand FH from Shin-Nakamura Chemical Co., Ltd. can be used.

Moreover, the composition for forming the coating layer of this invention may contain a thickener. As the thickener, acrylic acid thickeners, urethane associative thickeners, cellulose thickeners, and the like can be used. The amount of the thickener attached to the fabric is usually about 0.5 to 5.0 g / m ² .

  The viscosity of the coating composition is suitably about 20,000 to 70,000 mPa · s, particularly preferably about 30,000 to 55,000 mPa · s. In the present specification, the viscosity of the coating composition means that a B-type viscometer (BH type) is used at a measurement temperature of 20 ° C., rotor No. 6, rotation speed of 10 rpm, and 30 seconds after starting rotation. It means the measured viscosity.

  The coating composition can be applied to the fabric using a knife coater, comma coater, bar coater, die coater, kiss roll coater, gravure coater or the like. Moreover, the drying conditions after apply | coating the composition for coating to a fabric are 110-170 degreeC, for example, Better 120-160 degreeC, Especially it can be made into about 2 to 5 minutes at 120 to 130 degreeC. When the coating composition contains thermally expandable microcapsules, the microcapsules can be thermally expanded during the heat drying.

The content of the binder resin contained in the coating layer per unit area of the fabric, about 13~35g / m ² (in particular 15 to 30 g / m ² or so) is appropriate. When the thickener is an acrylic resin, the combined content of the binder and the thickener resin is preferably within the above range.

The amount of the coating layer on the fabric (after drying) is preferably 40 to 75 g / m ² , more preferably 50 to 70 g / m ² per unit area of the fabric. In particular, when the amount of the coating layer is 70 g / m ² or less (particularly 60 g / m ² or less), the adhesion between the fabrics can be further reduced. However, when the coating layer contains thermally expandable microcapsules, even if the amount of the coating layer is more than 70 g / m ² , the adhesion between the fabrics can be reduced. Therefore, when the coating layer includes thermally expandable microcapsules, the amount of the coating layer (after drying) may be about 45 to 90 g / m ² or about 50 to 80 g / m ² per unit area of the fabric. .

In addition, the polyester fabric of the present invention may be dyed and / or flame retardant processed before the antifouling treatment (impregnation treatment with a fluorine-based water and oil repellent). For example, it is possible to use a fabric dyed in a bath containing disperse dyes or a fabric flame-retardant processed in a bath containing an organophosphorus flame retardant and further subjected to the antifouling treatment. . The input amount of the flame retardant (solid content) during processing in the bath is 0.2 to 3.5% owf, particularly about 0.4 to 3.0% owf, as owf (input amount relative to the weight of the fabric) The amount of adhesion to the fabric is suitably 0.5 to 4.0 g / m ² , particularly about 1.0 to 3.0 g / m ² .
In addition, dyeing and flame retardant may be performed in the same bath. In addition, when the fabric is dyed at a high dye concentration (about 5% owf or more) at the time of dyeing, reduction washing may be performed after dyeing.

  Hereinafter, the present invention will be described in more detail with reference to comparative examples and examples, but the present invention is not limited to the examples.

[Example 1]
In the bath, together with black disperse dye (added so as to be about 6.0% owf in terms of solid content), phosphoric acid amide-based difficulty sold under the trade name of Bigor FV-6010 by Daikyo Chemical Co., Ltd. The process shown in Table 1 is to add 2.52% owf (converted to solid content) of a flame retardant, perform flame-retardant processing in the bath simultaneously with dyeing, and then perform reduction cleaning (80 ° C. × 15 minutes) to dry the fabric. Was processed.
For antifouling treatment (step 1) by dip-nip, as a fluorine-based water and oil repellent, Asahi Guard Co., Ltd. sold under the name of Asahi Guard E Series and from Nikka Chemical Co., Ltd. Using a mixture of fluorinated water and oil repellents sold under the name of NK Guard S, an aqueous dispersion containing 1.6 to 3.6% by weight (in terms of solid content) of fluorinated water and oil repellents. The polyester fabric (100% polyester: basis weight 280 g / m ² ) was dipped (150 ° C., 2 minutes 30 seconds), and then squeezed with mangle at a pressure of 3.0 kgf / cm ² (pic-up rate 60%) .

  In the coating step (step 5), the back surface of the fabric was coated with a knife coater using the coating composition adjusted to have a viscosity in the range of 30,000 to 35,000 mPa · s. As the thickener, Vanazol KB-660 (acrylic acid resin) sold by Shin-Nakamura Chemical Co., Ltd. was used.

  The flame retardant used for the coating is an inorganic phosphorus flame retardant having high water solubility (ammonium polyphosphate: APP), or an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4.0% or less. . As the organic phosphorus flame retardant, a mixture of melamine phosphate (manufactured by Shin-Nakamura Chemical Co., Ltd.) and a phosphonic acid ester flame retardant sold under the name SY-TC1 from Shinba Co., Ltd. A weight ratio of 1: 1) was used.

  The fluorine-based water / oil repellent used for coating is a fluorine-based water / oil repellent sold by Nikka Chemical Co., Ltd. under the name NK Guard S-0545.

  The heat-expandable microcapsule used for the coating is a heat-expandable microcapsule sold by Matsumoto Yushi Seiyaku Co., Ltd. under the name of Microsphere F-50.

  The acrylic resin used for coating is an acrylic resin having a glass transition point of −41 ° C. sold by Japan Coating Resin Co., Ltd. under the name of Movinyl 7400, and the urethane resin is from Daiichi Kogyo Seiyaku Co., Ltd. It is a urethane resin sold under the name Superflex E-2000.

  About the processed fabric manufactured by the process shown in Table 1, the flame retardancy, salad oil antifouling property, water repellency, wrinkle resistance, tackiness / adhesiveness at the time of cutting, and friction fastness are then obtained by the following methods. Tested.

<Flame retardant performance>
Tests were conducted in accordance with “Flammability of interior materials” defined in the Federal Motor-Vehicle Safety Standard (FMVSS) to determine flame retardancy.
If the test piece (processed fabric) is not ignited even if the flame is applied for 15 seconds, or if it is ignited but digested by the A mark, it is indicated as “N”. Record the burning time and burning distance and calculate the burning rate (mm / min). As the test piece, the test was performed using three test pieces cut in the long axis direction (vertical) and the width direction (horizontal) of the processed fabric (the results of the worst test piece are shown in the table).

<Salad oil antifouling test>
As a test piece, about 10 × 10 cm square size is prepared from each sample (processed fabric). Place a soft wipe (Erière Pro Wipe) on the tray and place the test piece (if coated, place it on the soft wipe with the coating side (back side) down) and put the salad oil on the test piece with a dropper about 5 mm in diameter or Add 5ml in 5ml.
Place tray in gear oven 83 ° C and let stand for 24 hours. After 24 hours, the tray is taken out, and the surface of the test specimen is observed for whether the salad oil dripping site is wet (no oil spot is generated), and the back and soft wipes are free of salad oil spot. The test piece is judged to be acceptable (◯) if there are no oil spots on the front and back surfaces of the test piece and the soft wipe placed underneath.

<Water repellency>
A test piece cut to a size of 20 cm × 20 cm is attached to an apparatus defined in JIS L1092 6.2 so that wrinkles do not occur in the test piece holding frame.
Place 250 ml of distilled water or ion-exchanged water in the funnel and spread it on the test piece.
Next, remove the test piece together with the holding frame from the table, hold it all at once, hold the test piece upside down, lightly touch the other end against a hard object, turn it 180 °, and operate as before. Drop extra water drops.
The wet state of the test piece is scored with the holding frame attached.
0 point: The front and back surfaces show wetness on the whole surface 50 points: Shows wetness on the entire surface 70 points: Shows wetness on half of the surface, and shows a state where small individual wetness penetrates the cloth 80 points: 90 points: those that do not wet the surface but show the attachment of small water droplets 95 points: those that do not wet the surface and that show small amounts of water droplets 100 points: surface There is no wetting or water droplets attached.

<With wrinkles>
4 ml of distilled water at 80 ° C. was dropped onto the surface of the processed fabric and allowed to dry naturally for 24 hours. After that, the surface and the back surface were checked for wrinkles (color change) and the back surface was wet. . The case where the fabric surface is grade 4 or higher, the fabric back side is grade 4 or higher, and there is no wetting is evaluated as pass (◯).
Judgment details
・ 5th grade No color change ・ 4th grade Almost no color change ・ 3rd grade Some color change ・ 2nd grade Color change easily seen ・ 1st grade color change is remarkable

<Adhesion and adhesiveness when cutting>
Twenty test pieces (about 1.5 m × about 5 m) are prepared from the sample (processed fabric), and all the 20 pieces are stacked and cut into a predetermined shape by a laminated automatic cutting machine (NC cutting machine). After the cutting, when the laminated body cut into a predetermined shape (laminated body composed of 20 test pieces) was loosened, it was not separated as a single test piece and remained in a state of being adhered to other test pieces. Count the number of specimens.

<Friction fastness>
A dry test (DRY) and a wet test (WET) were performed on each processed fabric according to JIS L0849 (Dye Fastness Test Method for Friction). Contamination was determined using grade 1 to 5 using a gray scale for contamination (JIS L0805).

Table 1 shows the performance of the processing step and the processed fabric, and Table 2 shows the solid content of each component adhering to the base fabric by the dip-nip process and the coating process (unit: g / m ² ).

  As shown in Table 1, blanks (fabrics subjected only to dyeing and flame-retardant treatment in bath and reduction cleaning) had poor results in salad oil antifouling tests. On the other hand, when the fabric was further dip-nip processed with an aqueous dispersion containing a fluorine-based water and oil repellent (No. 1), the results of the salad oil antifouling test and the water repellent test were good, but difficult Flammability decreased and friction fastness also decreased. On the other hand, when reduction cleaning was performed after dip-nip treatment (No. 2), the fastness to friction was improved to grade 4 for both DRY and WET, but the flame retardant performance remained insufficient. Furthermore, when the flame retardant back coating layer (BC1) was formed on the back side of the fabric after dip-nip / reduction cleaning (No. 3), the flame retardant performance was "N". Occurrence of oil spots was confirmed, and the wrinkles worsened. Next, the fabric after dip-nip / reduction cleaning contains a polyphosphate ammonium salt (APP) as a flame retardant, a urethane resin as a binder resin, and a composition containing a fluorine-based water / oil repellent, When the flame / antifouling back coating layer (BC2) is formed (No. 4-6), the flame retardant performance is “N” and the salad oil antifouling test and water repellency have also passed the acceptance standards, but the wrinkles are bad The adhesiveness at the time of cutting was remarkably deteriorated (20 test pieces were all attached and were lump-like).

On the other hand, a back coating layer (BC3) containing a fluorine-based water and oil repellent and an organic phosphorus flame retardant having a solubility in water of 4% or less, and an acrylic resin having a glass transition point of −41 ° C. as a binder resin. Is formed on the back side of the fabric (No. 7 to 9), the desired properties can be achieved in all of flame retardancy, salad oil antifouling property, water repellency, and wrinkle performance, and at the time of cutting Adhesion was also greatly improved compared to urethane resin. In particular, when the amount of the coating layer per unit area of the fabric was adjusted to 70 g / m ² or less (No. 8 and No. 9), the adhesion at the time of cutting was further reduced. In addition, when the binder resin was changed to an acrylic resin having a glass transition point of −45 ° C. and −50 ° C., it was confirmed that the lower the glass transition point, the worse the tackiness at the time of cutting. On the other hand, when the glass transition point of the acrylic resin is too high, the coating layer becomes hard, and thus the tendency of the fabric texture to harden is confirmed. For this reason, it is appropriate to use an acrylic resin having a glass transition point in the range of −43 ° C. to −20 ° C. as the binder resin used for the coating layer. Moreover, when using polyester-type resin as binder resin, the tendency for the adhesiveness of a fabric to deteriorate was confirmed like the case where urethane-type resin is used. This is presumably because the polyester resin melted due to the heat at the time of cutting the fabric by the NC cutter and exhibited hot melt adhesive-like properties.

  Further, when a back coating layer (BC4) is formed using a composition to which further thermally expandable microcapsules are added (No. 10), the flame retardancy, salad oil antifouling test, water repellency, and wrinkle performance In all cases, the desired properties could be maintained, and zero specimens adhered to other specimens after cutting.

From the above experiments, in order to obtain a fabric that is less likely to be wrinkled in addition to the desired flame retardancy and antifouling property and to which the fabrics do not easily adhere to each other, on one side of the fabric impregnated with a fluorine-based water and oil repellent agent , Forming a coating layer containing a fluorine-based water and oil repellent and a flame retardant, and as a flame retardant forming this coating layer, using an organic phosphorus flame retardant having low solubility in water, as a binder resin, It was confirmed that it is preferable to use an acrylic resin having a glass transition point of -43 ° C to -20 ° C.
It was also confirmed that the adhesion of the fabric can be further reduced by reducing the amount of the coating layer or by adding thermally expandable microcapsules to the coating composition to form irregularities on the surface of the coating layer. .

  The fabric of the present invention has excellent flame retardancy and antifouling properties and is less likely to cause wrinkles, and is therefore suitable for use as a fabric for interiors of vehicles such as automobiles. In addition, since the fabric of the present invention hardly adheres to each other even if the fabrics are stacked, it is excellent in workability when laminated and cut.

Claims (6)

A polyester-based fabric impregnated with a fluorine-based water and oil repellent, and having a coating layer on one side thereof;
The coating layer contains a fluorine-based water / oil repellent, an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4% or less, and an acrylic resin having a glass transition point of −43 ° C. to −20 ° C. A fabric characterized by being made.   The fabric according to claim 1, wherein the coating layer is formed on a back surface of the fabric.   The fabric according to claim 1 or 2, wherein the coating layer further includes a thermally expandable microcapsule, and the thermally expandable microcapsule protrudes from a surface of the coating layer to form irregularities. The fabric according to any one of claims 1 to 3, wherein the amount of the coating layer is 70 g / m ² or less per unit area of the fabric. (A) a step of immersing the polyester-based fabric in a treatment liquid containing a fluorine-based water / oil repellent and including the treatment liquid, and then drying the cloth;
(B) a step of washing the fabric with warm water or reducing and washing at a temperature of 65 to 90 ° C;
(C) Coating containing a fluorine-based water / oil repellent, an organic phosphorus flame retardant having a solubility in water at 20 ° C. of 4% or less, and an acrylic resin having a glass transition point of −43 ° C. to −20 ° C. Coating one side of the fabric with the composition for use,
The manufacturing method of the fabric characterized by including. The coating composition used in the step (C) further comprises a thermally expandable microcapsule,
The method of Claim 5 including the process of expanding the thermally expansible microcapsule contained in the said composition, and making it protrude from the surface of a coating layer by performing heat processing after the said process (C).