JP4690159B2 - Method for producing coated fabric - Google Patents

Description

The present invention relates to a manufacturing method of coating the fabric.

  Coated fabric that has both moisture permeability and waterproofness has the function of releasing water vapor from sweating from the body to the outside of the clothes (moisture permeability) and the function of preventing rain from entering the clothes (waterproofness). ing. As a production method, a method in which a polyurethane resin is applied to the surface of a fiber fabric and a resin layer is formed by a dry method or a wet method is known. The coated fabric is mainly used for sports clothing and cold clothing. Among them, it can be suitably used in sports or outdoor clothing fields where the amount of sweating associated with exercise is relatively large, and is particularly frequently used in fields such as skiing, athletics and mountain climbing. As a general usage method, the resin layer is used on the back side, and the lining is further attached.

  In recent years, there has been a strong demand for using a coated fabric as a single piece without using a lining due to demands for weight reduction and cost reduction of materials. When used as a single sheet, it is preferable to add design properties to the resin layer. As such a method, after a coated fabric is produced, a method of applying a pattern or a pattern on the resin layer by gravure coating or screen printing is widely adopted.

  However, in the above method, there remains a problem that the pattern or the pattern tends to disappear due to wear or washing during wearing.

As a countermeasure for such a problem, in Patent Document 1, a moisture permeable waterproof membrane mainly composed of polyurethane resin is provided on one side of a fiber fabric, and the moisture permeable waterproof membrane forms a minute gap at an adhesive interface with the fiber fabric. A moisture permeable waterproof coating fabric having a specific area ratio and partially adhering is disclosed. That is, the structure of the moisture permeable waterproof film is not used as a pattern, but a pattern is added later.
JP 2004-169233 A

  However, although the above moisture-permeable and waterproof coating fabric has a visual effect, there is a problem that it has a poor three-dimensional effect and is not sufficient as a degree of design. Further, there is a problem that the peel strength is slightly inferior due to the structure.

  This invention is made in view of such a present condition, and makes it a subject to provide the coating fabric which has the designability excellent in durability, and its manufacturing method.

The present invention solves the above-mentioned problems, and the gist thereof is as follows.
( 1 ) A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent, and a water-soluble polymer on one surface of the fiber fabric in a non-whole form, and a second step of foaming the foaming agent by heat treatment. , the polymer solution process for producing a co computing fabric, characterized in that it comprises a third step of wet-type coating on the entire surface shape using the containing polyurethane resin.
( 2 ) A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent, and a water-soluble polymer on one side of the fiber fabric in a non-whole form, a water washing step following the first step, and a polyurethane resin a second step and, co computing fabric manufacturing method characterized by comprising a third step of foaming the foaming agent by heat treatment you dry coating on the entire surface shape using a polymer solution containing a.
(3) A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent, and a water-soluble polymer on one side of the fiber fabric in a non-whole form, and using a polymer solution containing the polyurethane resin A method for producing a coated fabric, comprising: a second step of performing wet coating, and a third step of foaming the foaming agent by heat treatment.

  The coated fabric of the present invention has a structure in which a porous first resin layer is coated on a non-whole surface on a fiber fabric, and a second resin layer is further coated on the entire surface. It has a good design and rich design, and also has excellent durability. Furthermore, the coated fabric of the present invention is excellent in tear strength and texture, and is suitable for sports clothing and cold clothing.

  Moreover, according to the manufacturing method of the coating fabric of this invention, such a coating fabric can be obtained easily at low cost.

  Hereinafter, the present invention will be described in detail.

  Examples of the fiber fabric used in the present invention include polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, and triacetate. Or a woven fabric, a knitted fabric, a nonwoven fabric, or the like made of a composite spun yarn such as nylon 6 / cotton or polyethylene terephthalate / cotton.

  In the coated fabric of the present invention, a porous first resin layer mainly composed of a polyurethane resin is coated on a non-whole surface on one side of the above-described fiber fabric. “Non-entirely coated” refers to an aspect in which a portion where the first resin layer is coated and a portion where the first resin layer is not coated are repeated alternately on the surface of the fiber fabric. Therefore, it is not an embodiment in which the resin layer is coated only on a specific portion of the fiber fabric surface and the rest is not coated.

  Examples of the pattern coated on the non-full surface include a uniform pattern such as a dot shape, a lattice shape, a linear shape, a diagonal shape, a pyramid shape, and a turtle shell shape, or a pattern similar to them. FIG. 1 schematically shows a plan view of a dot-like pattern, and FIG. 2 schematically shows a plan view of a tortoise-like pattern.

  In the present invention, desired design properties can be obtained by appropriately using the above-described patterns.

  Examples of the polyurethane resin include a copolymer obtained by reacting an isocyanate and a polyol. As isocyanate, aromatic diisocyanate, aliphatic diisocyanate, alicyclic diisocyanate etc. are used individually or in mixture, for example. Specific examples include tolylene 2,4-diisocyanate, 4,4′-diphenylmethane diisocyanate, 1,6-hexane diisocyanate, 1,4-cyclohexane diisocyanate, and trifunctional or higher functional isocyanates are used as necessary. May be. On the other hand, polyether polyol, polyester polyol, or the like is used as the polyol. Examples of the polyether polyol include polyethylene glycol, polypropylene glycol, and polytetramethylene glycol. Examples of polyester polyols include reaction products of diols such as ethylene glycol and propylene glycol with dibasic acids such as adipic acid and sebacic acid, and ring-opening polymers such as caprolactone.

  The first resin layer may contain a polymer other than the above polyurethane resin, but preferably contains 50% by mass or more of the polyurethane resin. Examples of the polymer other than the polyurethane resin include polymers such as polyacrylic acid, polyvinyl chloride, polystyrene, polybutadiene, polyamino acid, and polycarbonate, copolymers thereof, or the above-described heavy polymer modified with fluorine or silicon. Examples thereof include copolymers and copolymers.

  In the present invention, the first resin layer is porous. That is, it means a state in which a large number of holes are present in the resin layer or inside and on the surface. As a hole diameter of many holes existing in the first resin layer, it is more than 5 μm, and more preferably 10 to 80 μm. Here, as the hole diameter of a hole other than a circle, the diameter of a circle having the same area as the hole is defined as the hole diameter. In addition, as a measuring method of a hole diameter, it can measure using a cross-sectional photograph. For example, using a scanning electron microscope (for example, S-4000 field emission scanning electron microscope manufactured by Hitachi, Ltd.), a cross-sectional photograph of the resin layer is taken at a magnification of 10,000 times, and the pore diameter is calculated based on this photograph. .

  The form of the hole is not particularly limited, and may be a closed hole, a part in which adjacent holes are partly connected, or a part in which the resin layer communicates from the inside to the surface. An example of the first resin layer 1 is shown in FIGS. Specifically, FIG. 3 schematically shows a cross-sectional view in the case of having only a closed hole. FIG. 4 schematically shows a cross-sectional view when adjacent holes are partially connected. FIG. 5 schematically shows a cross-sectional view when a part of the hole communicates from the inside to the surface of the resin layer.

  As the first resin layer, individually independent closed holes as shown in FIG. 3 are preferable. Such a shape of the hole 3 is obtained by using the thermally expandable microcapsule 6, whereby a desired hole having a relatively uniform shape can be stably obtained, so that a clear pattern can be expressed. It is advantageous.

  Examples of the thermally expandable microcapsule 6 include those in which a low-boiling hydrocarbon 4 such as isobutane, isopentane, or n-pentane is encapsulated with a shell wall 5 of a thermoplastic resin such as vinylidene chloride or acrylonitrile.

  Moreover, the hole 3a as shown in FIG. 4 can be obtained using, for example, a thermally decomposable foaming agent. Examples of the thermally decomposable blowing agent include organic blowing agents such as azodicarbonamide, dinitrosopentamethylenetetramine, p, p'-oxybisbenzenesulfonyl hydrazide, p-toluenesulfonyl hydrazide, or carbonate or organic Examples include acid-based inorganic foaming agents. As described above, in the present invention, as the foaming agent, either a thermally expandable microcapsule or a thermally decomposable foaming agent can be used, and among them, a thermally expandable microcapsule is preferable from the viewpoint of design and processing stability. Used.

  In the resin layer illustrated in FIG. 5, the holes 3 b communicate from the inside to the surface of the resin layer. Compared with the case of FIG. 3, 4, this thing can improve tear strength and a texture more. Such communicating holes can be obtained, for example, by once forming a resin layer using a water-soluble polymer and then eluting the water-soluble polymer. Examples of the water-soluble polymer include polysaccharides such as starch, dextrin and sodium alginate, cellulose esters such as cellulose butyrate and cellulose acetate butyrate, cellulose ethers such as methylcellulose, ethylcellulose, carboxymethylcellulose and hydroxyethylcellulose, gelatin and albumin And water-soluble protein polymer compounds such as globulins, synthetic water-soluble polymer compounds such as polyvinyl alcohol, polyvinyl pyrrolidone and polyacrylamide, and derivatives thereof. These compounds may be used alone or in combination. be able to.

  As thickness A of the 1st resin layer, 20-200 micrometers is preferred and 30-100 micrometers is more preferred. The thickness of the first resin layer refers to the thickest portion as shown in FIG. 3, and the measurement method is a scanning electron microscope (for example, S-4000 field emission scanning electron microscope manufactured by Hitachi, Ltd.). The cross-sectional photograph of the resin layer is taken at a magnification of 1000 times, and the thickness is obtained based on this photograph.

  In the first resin layer, the ratio of the coated area is not particularly limited, but is preferably in the range of 5 to 70%. This ratio is calculated by the following equation (1), where S1 is the area of one side of the fiber fabric, and S2 is the area coated with the first resin layer.

  When the ratio of the coated area is less than 5%, it is not preferable because the tear strength and the texture tend to be lowered along with the design properties. On the other hand, if it exceeds 70%, the waterproof property is lowered, and the portion where the second resin layer is directly coated on the fiber fabric is reduced, so that the second resin layer tends to be peeled off, which is not preferable.

  In addition, when setting the ratio of said coating area large, it is preferable that a 1st resin layer is a moisture-permeable thing.

  In the coated fabric of the present invention, the second resin layer mainly composed of polyurethane resin is coated on the entire surface from above the first resin layer. The form of the second resin layer is not particularly limited, and may be, for example, a porous layer. However, if the first resin layer and the second resin layer have the same quality, the coated pattern of the first resin layer becomes difficult to visually recognize. Therefore, in this case, it is preferable to make the pattern clearly visible by making a difference in the size of the holes from the first resin layer. For this reason, in the present invention, it is more preferable to adopt a form different from the first resin layer as the form of the second resin layer, and from the viewpoint of moisture permeability, waterproofness and design, it is nonporous. It is particularly preferred that it is any of a quality, a microporous, or a honeycomb skin core layer.

  FIG. 6 schematically shows a cross-sectional view of a coated fabric when a nonporous resin layer is employed as the second resin layer 7. The term “non-porous” includes not only the case where there are no holes in the resin layer, but also the case where the hole diameter is very fine as less than 0.01 μm.

  FIG. 7 schematically shows a cross-sectional view of a coating fabric when a microporous resin layer is employed as the second resin layer 7. The pore diameter of the microporous material is preferably 0.01 to 5 [mu] m and many of the pore diameters are 1/100 to 1/5 of the pore diameter of the porous material.

  Further, FIG. 8 schematically shows a cross-sectional view of the coated fabric in the case where a honeycomb skin core layer resin layer is employed as the second resin layer 7. The honeycomb skin core layer is microporous as a whole, but has a hollow hole in which holes having a diameter of 5 to 50 μm are communicated with each other inside the resin layer. The honeycomb skin core layer as a whole has moisture permeability and waterproofness.

  When the coated fabric of the present invention is viewed from the surface on which the first resin layer 1 is coated, the pattern of the first resin layer 1 can be visually recognized, and the design property excellent in three-dimensional appearance is exhibited. . In the present invention, since the first resin layer 1 is coated on the entire surface, there is a portion where the second resin layer 7 is directly coated on the fiber fabric 2, and the peel strength is greatly reduced. There is nothing to do. Therefore, it is excellent in durability. As a result, the pattern is unlikely to disappear, unlike the pattern that was given later.

  As thickness B of the 2nd resin layer, when a resin layer is nonporous, 1-20 micrometers is preferable and 3-15 micrometers is more preferable. If the thickness in this case is less than 1 μm, even if a high-density fiber fabric is used, it tends to be difficult to exhibit waterproofness, which is not preferable. On the other hand, if it exceeds 20 μm, the moisture permeability tends to decrease, which is not preferable. Moreover, in the case of other than nonporous, 5-80 micrometers is preferable and 10-60 micrometers is more preferable. If the thickness in this case is less than 5 μm, even if a high-density fiber fabric is used, waterproof properties tend to be hardly exhibited, which is not preferable. On the other hand, if it exceeds 80 μm, the texture is not only hardened but also moisture permeability tends to be lowered, which is not preferable. Note that the thickness of the second resin layer is a portion where the second resin layer 7 is directly coated on the fiber fabric 2 as shown in FIG. As a measuring method, it is obtained from a cross-sectional photograph as in the case of the first resin layer.

  In the coated fabric of the present invention, it is preferable that a colorant is contained in one of the first resin layer or the second resin layer, or a colorant having a different color tone is contained in each. Thereby, since the pattern of a 1st resin layer can be visually recognized more clearly, the design property of a coating fabric can be improved more.

  The colorant is not particularly limited as long as it can color the resin layer without any spots, but a pigment is preferable from the viewpoint of durability.

  As the pigment, either an organic pigment or an inorganic pigment can be used.

  Examples of the organic pigment include phthalocyanine-based, dioxazine-based, and anthraquinone-based organic pigments.

  On the other hand, examples of the inorganic pigment include white inorganic pigments such as titanium white and zinc white, cobalt compound inorganic pigments such as cobalt green, cerulean blue, cobalt blue and cobalt violet, yellow, reddish brown and dark blue mainly composed of iron oxide. Examples thereof include iron compound inorganic pigments such as pearl pigments composed of a mica layer and a titanium oxide layer, and fluorescent pigments. In using the pigment, the pigment can be used alone or in combination depending on the desired color, gloss, and the like.

  The resin layer may contain an inorganic substance for the purpose of increasing the gloss of the resin layer. Examples of the inorganic substance include calcium carbonate, magnesium oxide, silicon dioxide, and aluminum oxide. If these inorganic substances and the colorant are used in combination, the color tone and gloss of the resin layer can be further improved.

  Next, the manufacturing method of the coating fabric of this invention is demonstrated.

  As the fiber fabric used in the production method of the present invention, it is preferable to use a water-repellent processed fabric. The water repellent finish is one means for preventing the polymer solution from penetrating into the fiber fabric. That is, by performing water-repellent processing, it is possible to prevent troubles such as the polymer solution penetrating into the fiber fabric and causing resin leakage or the shape of the coating pattern to collapse. As the water repellent used in the water repellent processing, for example, a paraffinic water repellent, a polysiloxane water repellent or a fluorine water repellent can be used, and the processing method includes a normal padding method or a spray method. The method can be adopted. When particularly excellent water repellency is to be imparted, for example, a 5% aqueous dispersion of a fluorine-based water repellent emulsion (manufactured by Asahi Glass Co., Ltd., “GS-10 (trade name)”) is applied to a fiber fabric by a padding method ( After applying at a drawing ratio of 25%, heat treatment may be performed at 150 to 180 ° C. for 30 to 120 seconds.

  In addition to the above water-repellent processing, it is preferable that the fiber fabric is calendered because the penetration of the polymer solution into the fiber fabric can be further prevented. As a processing method, what is necessary is just to implement at the temperature of 140-170 degreeC, the pressure of 250-320 kPa, and the speed of 25-35 m / min using the calendar processing machine provided with the mirror surface roll, for example.

  In the production method of the present invention, there are roughly two methods. That is, a method of foaming a foaming agent before forming the second resin layer (hereinafter referred to as “the former method”) and a method of foaming the foaming agent after forming the second resin layer (hereinafter referred to as “ The latter method ”).

  First, the former method will be described.

  According to this method, the first resin layer is formed by the first and second steps, and the second resin layer is formed by the third step.

  As a 1st process, the polymer solution containing a polyurethane resin and a foaming agent is dry-coated on the whole surface on the one side of a fiber fabric. Dry coating is a method of forming a resin layer by applying a polymer solution to a fiber fabric and then drying to evaporate the solvent.

  In the first step, a polymer solution containing a polyurethane resin and a foaming agent is used. The polymer solution may contain a resin other than the polyurethane resin, but preferably contains 50% by mass or more of the polyurethane resin. The content ratio of the polyurethane resin and other resin components and the foaming agent is not particularly limited, but the resin component / foaming agent is 200/1 to 2/1 in terms of solid content ratio. The range is preferable, and the range of 100/1 to 10/1 is more preferable. When the content ratio of the resin component and the foaming agent is within this range, the first resin layer can have sufficient strength, and the design can be further improved. If the solid content ratio exceeds 200/1 and the resin component increases, the degree of foaming tends to decrease, which is not preferable. On the other hand, when the foaming agent is increased below 2/1, it is not preferable because it becomes difficult to form a porous resin layer and adhesion and waterproofing properties to the fiber fabric tend to be lowered.

  Moreover, when a water-soluble polymer is contained in the polymer solution, the design property can be further improved and the tear strength and the texture can be improved. The content ratio of the resin component and the water-soluble polymer is not particularly limited, but the solid component ratio is preferably in the range of resin component / water-soluble polymer = 100/1 to 1/1, and 50/1. A range of ˜2 / 1 is more preferable. If the solid content ratio exceeds 100/1 and the resin component is increased, the tear strength and the like tend not to be improved so much. On the other hand, if the amount of water-soluble polymer is increased below 1/1, not only the foaming effect is decreased, but the shape of the pattern is collapsed. As a result, the design property tends to be lowered, which is not preferable.

  The solvent for the polymer solution is not particularly limited, and may be either water or an organic solvent. Examples of the organic solvent include isopropyl alcohol, toluene, ethyl acetate, methyl ethyl ketone, N, N-dimethylformamide, N-methylpyrrolidone and the like.

  The type of the polymer solution is not particularly limited, and may be any of an aqueous dispersion type, a W / O emulsion type, an O / W emulsion type, a water-soluble type, or a solvent type.

  As a method for applying the polymer solution, for example, it may be applied to a desired pattern using a printing machine such as a flat screen or a rotary screen, or a gravure processing machine.

  The ratio of the application area, that is, the ratio of the total area of the polymer solution applied to the total area of one side of the fiber fabric is not particularly limited, but may be in the range of 5 to 70%. preferable. When the ratio of the coated area is less than 5%, the tear strength and the texture tend to be lowered along with the design properties, which is not preferable. On the other hand, if it exceeds 70%, the waterproof property is lowered, and the portion where the second resin layer is directly coated on the fiber fabric is reduced, so that the second resin layer tends to be peeled off, which is not preferable.

  As a drying condition in the dry coating, for example, it may be dried at a temperature of 50 to 150 ° C. for 0.5 to 5 minutes while being spread using a pin tenter equipped with a drying furnace.

  The thickness of the resin layer after drying (the resin layer before foaming the foaming agent) is preferably from 3 to 100 μm, more preferably from 3 to 50 μm, and more preferably from 5 to 30 μm in order to obtain a final target thickness. Particularly preferred. If the thickness is less than 3 μm, the design property tends to be poor, which is not preferable. On the other hand, if it exceeds 100 μm, moisture permeability and waterproofness tend to be lowered, which is not preferable.

  Following the first step, a second step of foaming the foaming agent by heat treatment is performed. As a heat treatment method, for example, a pin tenter equipped with a drying furnace may be used in a spread form. As a heat treatment condition, when a thermally decomposable foaming agent is used, the heat treatment may be performed at a temperature of 100 to 190 ° C. for 0.5 to 5 minutes. However, 150-190 degreeC is preferable when a polyurethane resin is a hot-melt type. On the other hand, when using thermally expandable microcapsules, heat treatment may be performed at a temperature of 100 to 180 ° C. for 0.1 to 5 minutes.

  When the heat treatment is completed, the first resin layer is formed in a non-entire form, and thereafter, the process may be immediately transferred to the third process, but washed with water before the process is transferred to the third process. Also good. When the polymer solution containing the water-soluble polymer is used in the first step, the water-soluble polymer can be removed by washing with water. As a washing method, it may be simply immersed in a water bath, or may be carried out using a scouring machine such as an open soaper, a dyeing machine such as a jigger dyeing machine, a beam dyeing machine or a liquid dyeing machine. As water washing conditions, water washing may be performed for 0.5 to 15 minutes in a water bath at 5 to 80 ° C. After washing with water, drying may be performed as necessary.

  As described above, the thickness of the first resin layer is preferably 20 to 200 μm, and more preferably 30 to 100 μm.

  Next, as a third step, a dry coating or a wet coating is performed on the entire surface using a polymer solution containing a polyurethane resin from above the first resin layer. The wet coating is a method of forming a resin layer by applying a polymer solution and then immersing it in a large amount of water.

  The third step is a step for forming the second resin layer, and the form of the second resin layer is any of nonporous, microporous or honeycomb skin core layer as described above. preferable. The desired form of the second resin layer can be achieved by appropriately selecting the coating method and the type of polymer solution. For example, a non-porous resin layer can be formed by dry coating using an aqueous dispersion type, water-soluble type or solvent type polymer solution, and a W / O emulsion or O / W emulsion type polymer solution. A microporous resin layer can be formed by dry-coating using the coating. Furthermore, a resin layer of the honeycomb skin core layer can be formed by wet coating using a solvent-type polymer solution using a polar organic solvent such as N, N-dimethylformamide or N-methylpyrrolidone as a solvent. .

  As a coating method of the polymer solution, a normal coating method can be employed. For example, it can apply | coat using a knife coater, a comma coater, or a reverse coater.

  Moreover, it is preferable that the polymer solution contains a compound having excellent affinity for the fiber fabric and the polyurethane resin in order to improve the adhesion to the fiber fabric and the first resin layer. As such a compound, an isocyanate compound can be preferably used.

  As the isocyanate compound, for example, isocyanate which is one component of the polyurethane resin used in the first step can be used.

  It is preferable to use it in the range of 0.1-10 mass% with respect to a polymer solution as the usage-amount of an isocyanate compound. If the amount used is less than 0.1% by mass, the adhesive strength to the fiber fabric tends not to be improved so much. On the other hand, if it exceeds 10% by mass, the texture tends to harden, which is not preferable.

  As drying conditions in the dry coating, for example, heat treatment may be performed at a temperature of 50 to 150 ° C. for 0.5 to 5 minutes while using a pin tenter equipped with a drying furnace and the like.

  On the other hand, the immersion in water during wet coating may be immersed in a water bath at 5 to 40 ° C. for 0.5 to 2 minutes. Immersion is for replacing the solvent and water in the polymer solution to solidify the resin component, but this is the case when a polymer solution containing a water-soluble polymer is used in the first step. The water-soluble polymer can be eluted by immersion. Therefore, when a polymer solution containing a water-soluble polymer is used in the first step and the heat treatment is performed in the second step and then the process proceeds to the third step, it is preferable to employ wet coating in the same step. In addition, after immersion, you may perform water washing and drying as needed.

  As described above, the thickness of the second resin layer is preferably 1 to 20 μm in the case of nonporous material, and preferably 5 to 80 μm in the case of other than nonporous material.

  After the third step, a water repellent treatment may be performed as necessary. This water repellent treatment can improve waterproofness. As the water repellent treatment method, the above-described method can be adopted.

  Next, the latter method, that is, a method of foaming the foaming agent after forming the second resin layer will be described.

  According to this method, the first resin layer is formed by the first and third steps, and the second resin layer is formed by the second step.

  As a first step in this method, a polymer solution containing a polyurethane resin and a foaming agent is dry-coated on a non-whole surface on one side of a fiber fabric. As in the former method, the polymer solution preferably contains a water-soluble polymer. After dry coating, the process may be immediately transferred to the second process described below, or may be transferred to the second process after being washed with water. As in the former method, when a polymer solution containing a water-soluble polymer is used in the first step, the water-soluble polymer can be removed by washing with water.

  As a 2nd process, the dry coating or wet coating is carried out to the whole surface using the polymer solution containing a polyurethane resin. However, when dry coating is performed using a polymer solution containing a water-soluble polymer in the first step and the process proceeds to the second step as it is, it is preferable to employ wet coating in the same step.

  Subsequently, as a third step, the foaming agent is foamed by heat treatment.

  After the third step, a water repellent treatment may be performed as necessary, as in the former method.

EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, the measurement and evaluation of the performance of the coating fabric in an Example, a comparative example, and a reference example were performed with the following method.
(1) Waterproofness The water resistance of the coated fabric was measured according to JIS L-1092 B method (high water pressure method).
(2) Moisture permeability The moisture permeability of the coated fabric was measured according to JIS L-1099 A-1 method (calcium chloride method).
(3) Tear Strength The tear strength in the weft direction of the coated fabric was measured according to JIS L-1096 D method (pendulum method).
(4) Designability The designability of the coated fabric was evaluated by visual observation, and relative evaluation was performed in the following three stages.
○: The coating pattern of the first resin layer is clearly visible.
Δ: The coating pattern of the first resin layer can be visually recognized.
X: The coating pattern of the first resin layer is hardly visible.
(5) Durability of coating The appearance change after 30 times of washing according to JIS L-0217 103 method was relatively evaluated in the following three stages.
○: Almost no change.
(Triangle | delta): The 2nd resin layer peeled partially and the 1st resin layer was washed away partially.
X: The 2nd resin layer peeled off remarkably and many 1st resin layers were washed away.
(6) The texture of the coated fabric was relatively evaluated by the following four steps by texture handling.
◎: Very soft ○: Soft △: Slightly hard ×: Hard

(Reference Example 1)
Weaving a plain fabric with a warp density of 110 / 2.54cm and a weft density of 95 / 2.54cm using nylon 6 multifilament 78dtex / 48f for both the warp and weft. Co., Ltd., “Kyanol Blue NR (trade name)”) was stained with 1% omf. Next, a 5% aqueous dispersion of a fluorine-based water repellent emulsion (manufactured by Asahi Glass Co., Ltd., “Asahi Guard GS-10 (trade name)”) was applied by a padding method (squeezing rate 25%), and then dried. Then, heat treatment was performed at 170 ° C. for 40 seconds.

  Next, using a calendering machine having a mirror surface roll, calendering was performed under conditions of a temperature of 150 ° C., a pressure of 300 kPa, and a speed of 30 m / min to obtain a fiber fabric that can be used in the present invention.

( Comparative Example 3 )
In the first step using the fiber fabric obtained in Reference Example 1, the composition shown in the following formulation 1 (solid content ratio: polyurethane resin / foaming agent = 25/1) was first formed on the calendar surface of the fiber fabric. Then, a polymer solution having a solid content of 26% and a viscosity of 5000 mPa · s / 25 ° C. was applied to the entire surface so that the ratio of the coated area was 35%. For application of the polymer solution, a gravure processing machine having a gravure roll having a surface shape of dots, a dot width of 0.7 mm, a dot interval of 0.4 mm, 23 mesh, and a depth of 100 μm was used. The pattern of the coating was a dot shape as shown in FIG. Then, it dried for 2 minutes at 100 degreeC, and formed the resin layer whose thickness is 20 micrometers. Subsequently, as a second step, the foaming agent was foamed by heat treatment at 130 ° C. for 1 minute to form a first resin layer having a thickness of 50 μm.

<Prescription 1>
Water-soluble polyurethane resin solution (Daiichi Kogyo Seiyaku Co., Ltd., “Superflex E-2000 (trade name)” 50% solid content) 50 parts by mass foaming agent (Daiichi Seika Kogyo Co., Ltd., thermal expansion micro Capsule “Microsphere M430 (trade name)” average particle diameter of about 15 μm, foaming temperature 115 to 140 ° C. 1 part by weight solvent (water) 50 parts by weight thickener (Daiichi Kogyo Seiyaku Co., Ltd., “M2005A ( Product name) ") 3 parts by mass

Next, as a third step, a polymer solution having a composition of the following prescription 2 and a solid content concentration of 20% and a viscosity of 9000 mPa · s / 25 ° C. is applied to the surface on which the first resin layer is formed using a comma coater. A second resin layer was formed by coating the entire surface in an amount of 150 g / m ² and immediately immersing in a 20 ° C. water bath for 1 minute. Then, washed with hot water for 10 minutes at 60 ° C., and dried for 3 minutes at 120 ° C., to obtain a co-computing fabric. The second resin layer was a honeycomb skin core layer, and the thickness was 55 μm.

<Prescription 2>
Ester-type polyurethane resin solution (manufactured by Dainichi Seika Kogyo Co., Ltd., “Resamine CU4555 (trade name)” solid content 27%) 100 parts by mass isocyanate compound (manufactured by Dainichi Seika Kogyo Co., Ltd., “Rezamin X (trade name) "100% solid content" 1 part by weight solvent (N, N-dimethylformamide) 40 parts by weight

(Example 1 )
Using the fiber fabric obtained in Reference Example 1, in the first step, first, the composition shown in the following formulation 3 (solid content ratio: polyurethane resin / foaming agent / water-soluble polymer = 25) on the calendar surface of the fiber fabric. / 2/5), a polymer solution having a solid content of 31% and a viscosity of 6000 mPa · s / 25 ° C. was applied in a non-overall manner so that the ratio of the application area was 40%. For application of the polymer solution, a gravure processing machine having a gravure roll having a surface shape of turtle shell and a dot width of 0.7 mm, a dot interval of 0.4 mm, 23 mesh, and a depth of 100 μm was used. The coating pattern was turtle-shaped as shown in FIG. Then, it dried at 100 degreeC for 2 minute (s), and formed the resin layer whose thickness is 25 micrometers. Subsequently, as a second step, the foaming agent was foamed by heat treatment at 130 ° C. for 1 minute to form a first resin layer having a thickness of 60 μm.

<Prescription 3>
Water-soluble polyurethane resin solution (Daiichi Kogyo Seiyaku Co., Ltd., “Superflex E-2000 (trade name)” 50% solid content) 50 parts by mass foaming agent (Daiichi Seika Kogyo Co., Ltd., thermal expansion micro Capsule “Microsphere M430 (trade name)” average particle diameter of about 15 μm, foaming temperature 115 to 140 ° C. 2 parts by mass water-soluble polymer (Daiichi Kogyo Seiyaku Co., Ltd., carboxymethyl cellulose “DKS Fine Gum HE” (product) Name) “10% aqueous solution” 50 parts by mass The third step and thereafter were carried out in the same manner as in Comparative Example 3 to obtain the coated fabric of the present invention.

(Comparative Example 1)
A comparative coated fabric was obtained in the same manner as in Comparative Example 3 except that the first and second steps were omitted.

(Reference Example 2)
Instead of a gravure processing machine having a gravure roll whose surface shape is dot-like, use a gravure processing machine having a gravure roll with a surface shape of 35 lines / 2.54 cm and a depth of 100 μm, and a coating pattern of dots. It is a lattice form instead of Jo, and except that 80% rather than 35% the proportion of the coating area, to give a co computing fabric in the same manner as in Comparative example 3.

(Reference Example 3)
Instead of a gravure processing machine having a gravure roll whose surface shape is a tortoiseshell shape, use a gravure processing machine having a gravure roll having a surface shape of a grid, 35 lines / 2.54 cm, and a depth of 100 μm, and the coating pattern is The coated fabric of the present invention was obtained in the same manner as in Example 1 except that the shape was not a shape but a lattice shape, and the ratio of the coated area was 80% instead of 40%.

( Comparative Example 4 )
As the first step, the same process as in the first step in Comparative Example 3 was performed, and then, as the second step, from the top of the resin layer, the composition shown in Formula 4 below was obtained, the solid content concentration was 19%, and the viscosity was 8000 mPa · s / A polymer solution at 25 ° C. was applied over the entire surface with a coating amount of 70 g / m ² using a comma coater, and dried at 100 ° C. for 2 minutes to form a second resin layer. Then, as the third step, the foaming agent used in the first step is foamed by heat treatment for 2 minutes at 130 ° C., to obtain a co-computing fabric. The second resin layer was nonporous and had a thickness of 12 μm.

<Prescription 4>
Ether type polyurethane resin solution (Seiko Kasei Co., Ltd., “Lackskin U2524 (trade name)” solid content 25%) 50 parts by mass polyurethane mat solution (Seiko Kasei Co., Ltd., “Lackskin U2524M (trade name) ) "Solid content 20%) 50 parts by mass solvent (isopropyl alcohol) 10 parts by mass solvent (toluene) 10 parts by mass

(Example 2 )
As the first step, first, it was carried out in the same manner as in the first step in Example 1, and then immersed in a 60 ° C. water bath for 10 minutes to remove the water-soluble polymer, followed by drying at 100 ° C. for 2 minutes.

Next, as the second step, after performing the same as the second step in Example 3 except that the coating amount is 60 g / m ² instead of 70 g / m ² , the third and subsequent steps are the same as in Comparative Example 4. The coating fabric of the present invention was obtained. The second resin layer was nonporous and had a thickness of 10 μm.

(Comparative Example 2)
A comparative coated fabric was obtained in the same manner as in Comparative Example 4 except that the first and third steps were omitted.

  Table 1 shows the performance measurement results and evaluation results of the coated fabrics obtained in the above Examples, Reference Examples and Comparative Examples.

As is clear from Table 1, the coated fabrics obtained in Examples 1 and 2 were excellent in design and texture in addition to moisture permeability, waterproofness and tear strength.

  On the other hand, the coated fabrics of Comparative Examples 1 and 2 were inferior in design strength and tear strength and texture because the first resin layer was not formed.

Further, the coated fabric of Reference Example 2 was inferior in waterproofness to the coated fabric of Comparative Example 3 because the ratio of the area coated with the first resin layer was high. For the same reason, the coated fabric of Reference Example 3 was inferior in waterproofness to the coated fabric of Example 1 . Moreover, since the ratio of the area by which the coating fabric of each of Reference Examples 2 and 3 was coated with the first resin layer was high, a part of the second resin layer was peeled off.

The top view of a dot-shaped coating pattern is shown typically. FIG. 2 schematically shows a plan view of a turtle-shaped coating pattern. It is an example of the 1st resin layer in this invention, and sectional drawing in the case of having only a closed hole is shown typically. It is an example of the 1st resin layer in this invention, and shows sectional drawing in case the adjacent holes are partially connected. It is an example of the 1st resin layer in this invention, and sectional drawing in case a part of hole is communicating from the inside of the resin layer to the surface is shown typically. It is an example of the coating fabric of this invention, and shows sectional drawing at the time of employ | adopting a nonporous resin layer as a 2nd resin layer. It is an example of the coating fabric of this invention, and shows sectional drawing at the time of employ | adopting a microporous resin layer as a 2nd resin layer. It is an example of the coating fabric of this invention, and shows sectional drawing at the time of employ | adopting the resin layer of a honeycomb skin core layer as a 2nd resin layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st resin layer 2 Fiber fabric 3, 3a, 3b Hole 4 Low boiling point hydrocarbon 5 Shell wall 6 Thermal expansion microcapsule 7 2nd resin layer A 1st resin layer thickness B 2nd resin layer Thickness

Claims (3)

A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent and a water-soluble polymer on one side of the fiber fabric in a non-whole form; a second step of foaming the foaming agent by heat treatment; and a polyurethane resin co computing fabric manufacturing method characterized by comprising a third step of wet-type coating on the entire surface shape using a polymer solution containing a. A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent and a water-soluble polymer on one side of the fiber fabric in a non-whole form, a water washing step following the first step, and a weight containing a polyurethane resin a second step and, the third step in the method of manufacturing the co computing fabric characterized by comprising causing the foaming agent is foamed by heat treatment you dry coating on the entire surface shape using coalescence solution. A first step of dry-coating a polymer solution containing a polyurethane resin, a foaming agent, and a water-soluble polymer on one side of the fiber fabric in a non-whole form, and a wet coating on the whole surface using the polymer solution containing the polyurethane resin And a third step of foaming the foaming agent by heat treatment.