JPH06173171A - Polyester cloth - Google Patents

Abstract

PURPOSE:To prepare a polyester cloth exhibiting highly durable water-repellency on one surface and highly durable hydrophilic property on the other surface. CONSTITUTION:This polyester cloth is composed of (A) a polyester fiber coated with a fluorine-containing amino-modified silicone compound bonded through an epoxy compound and (B) a polyester fiber coated with a hydrophilic epoxy compound. The fibers exposed to one surface of the cloth are composed mainly of the fiber (A) and those exposed to the other surface are composed mainly of the fiber (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester cloth having different performances on the front and back. More specifically, the present invention relates to a polyester cloth having one side having a water-repellent function with excellent durability and the other side having a hydrophilic function with excellent durability.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for fabrics having a plurality of functions, mainly for sports clothing. In particular, from the viewpoint of comfort, there is a strong demand for front and back different performance fabrics that are water repellent on one side and hydrophilic on the other side. Conventionally, as a method of manufacturing a cloth having such a composite function, a method of coating a processing agent according to the purpose on each surface of the cloth has been mainly adopted. However, depending on the thickness of the fabric, the processing agent may bleed on the other side, or the texture of the fabric may deteriorate.
Product problems were easy to occur. Further, since these processing agents have low adhesiveness to the polyester fiber cloth, the processing agents may fall off due to friction during washing or use, which is not always sufficient in terms of durability.

In order to improve such a point, a method has recently been proposed in which a cloth is made water repellent and then low temperature plasma treatment is applied to make only the treated surface hydrophilic (Japanese Patent Laid-Open No. 59-1065).
No. 70). However, this method also requires a special electric discharge device, requires a large amount of capital investment, and a large increase in processing cost is unavoidable. Further, depending on the processing conditions, low-temperature plasma processing reaches the surface of the fabric. There was a problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art. The object of the present invention is to prevent deterioration in performance due to friction during washing or wearing and durability. Provided is a polyester cloth having a surface having excellent water repellency and a surface having hydrophilicity on the front and back.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, in the polyester fiber spinning process, the fiber to which the fluorine-containing amino-modified silicone compound was added after the epoxy compound was added was It was found that the fibers having extremely excellent water repellency, while the fibers to which the hydrophilic epoxy compound is added, exhibit hydrophilicity having excellent durability. The present inventors have found that by exposing each fiber mainly on different cloth surfaces, a polyester cloth excellent in durability can be obtained in which one surface is water-repellent and the other surface is hydrophilic, and the present invention has been completed.

That is, according to the present invention, in a cloth made of polyester fibers in which the main constituent fibers on one surface of the cloth and the main constituent fibers on the other surface are different from each other, epoxy is used for the main fibers forming one surface. Provided is a polyester cloth characterized in that a fluorine-containing amino-modified silicone compound is coated via a compound, and a main fiber constituting the other surface is coated with a hydrophilic epoxy compound.

The polyester fiber in the present invention is a polycondensate of a glycol component such as ethylene glycol, trimethylene glycol, tetramethylene glycol and the like and a dicarboxylic acid component such as terephthalic acid and isophthalic acid,
Alternatively, it may be a polyester copolymer obtained by copolymerizing another third component as a part of the glycol component or the carboxylic acid component, or a fiber made of a blend of the polyester copolymer and another polymer.

If desired, the polyester fiber may contain optional additives such as a catalyst, a coloring preventing agent, a heat-resistant agent,
A flame retardant, an antioxidant, inorganic fine particles and the like may be contained.

In the present invention, one surface of the polyester cloth is coated with a fluorine-containing amino-modified silicone compound via an epoxy compound, and preferably the contact angle between the fiber and water is 65 degrees or more. It must consist primarily of fibers. The method for producing such a fiber is not particularly limited, but a method of applying an epoxy compound to a polyester undrawn yarn drawn at a low speed of about 100 m / min, followed by heat drawing and heat treatment, and then applying a fluorine-containing amino-modified silicone. Is preferable, since the adhesion between the epoxy compound and the polyester fiber is good, and the durability of water repellency is significantly improved.

The epoxide compound used herein contains two or more epoxy groups in the molecule, and the content of the epoxy groups is 0.2 g equivalent / 100 g or more. It is desirable for fixing the modified silicone and obtaining water repellency with excellent durability.

Examples of such epoxy compounds include aromatic epoxy compounds (for example, bisphenol A diglycidyl ether) which are reaction products of bisphenols and epichlorohydrin, ethylene glycol, glycerin,
Aliphatic epoxy compounds (eg, glycerin diglycidyl ether), which are reaction products of polyhydric alcohols such as sorbitol, pentaerythritol, and polyethylene glycol, and epichlorohydrin, 3,4-epoxycyclohexylethylene oxide, 3,4-epoxycyclohexylmethyl- 3,4-epoxycyclohexanecarboxylate, bis (3,4-epoxy-6-methyl-
Examples thereof include cycloaliphatic epoxy compounds such as cyclohexylmethyl) adipate. Among them, the polyhydric alcohol glycidyl ether is presumed to have excellent affinity with polyester, and the water repellency performance durability of the finally obtained fiber is favorable, which is preferable.

When the above-mentioned epoxy compound is applied to the polyester fiber, it is usually an emulsion or an aqueous solution. For example, the epoxy compound may be dissolved in a small amount of solvent as necessary, and then an emulsion or aqueous solution may be prepared using a known emulsifier such as sodium alkylbenzene sulfonate, dioctyl sulfosuccinate sodium salt, and nonylphenol ethylene oxide adduct. . The unstretched yarn provided with the epoxy compound is provided with the fluorine-containing amino-modified silicone after undergoing steps such as hot drawing and heat treatment, so in order to improve the passage stability of the step, the above epoxy compound-containing treatment is performed. It is desirable to use a commonly used fiber oil such as a smoothing agent and an antistatic agent in the liquid. The combination ratio of the epoxy compound and the oil agent component is not particularly limited as long as it is within the range that does not impair the object of the present invention, and in the relationship between process stability and durability of the finally obtained water-repellent performance. The weight ratio of the oil agent component / epoxy compound is preferably 10/90 to 70/30, although it may be set appropriately. Further, in order to accelerate the solidification of the epoxy compound, it is also preferable to use a catalyst such as an amine compound, particularly piperazine in combination.

The amount of the epoxy compound applied to the fiber is
The fiber weight is preferably 0.1 to 0.5%, and if it is out of this range, the durability of the water-repellent performance tends to be insufficient, or the texture of the obtained fabric tends to be deteriorated.

The undrawn yarn provided with the epoxy compound is
In order to make the fixing of the epoxy compound stronger, it is preferable that the epoxy compound is heat-stretched and / or heat-treated. By doing so, diffusion and curing of the epoxy compound into the polyester fiber proceed, and finally the water repellency obtained. The durability of performance is further improved. However, if the temperature is too high, the epoxy compound is deteriorated, and the texture of the obtained fiber tends to be hard. Therefore, a temperature of 70 to 250 ° C. is usually preferable.

Next, the fluorine-containing amino-modified silicone coated on the fiber treated with the above-mentioned epoxy compound has --R--NH ₂ or --R--NHCH ₂ CH ₂ NH ₂ (where R is a divalent group) in the side chain. An amino-modified group represented by (alkylene group), and —R _f (wherein R _f is a perfluoroalkyl group or a fluoroalkyl group in which a part of the fluorine atoms thereof is replaced by a hydrogen atom or a halogen atom other than a fluorine atom).
It is preferable that the compound represented by the formula (1) is used in combination and the amino group equivalent is 3000 or less. Amino group equivalent is 3
If it exceeds 000, the adhesion between the epoxy compound layer and the fluorine-containing amino-modified silicone tends to be insufficient, and the durability of water repellency tends to be difficult to obtain. The viscosity of the silicone at 25 ° C. is preferably 50 to 2000 centistokes in order to obtain durable water repellency.

The fluorine-containing amino-modified silicone is
It is applied to the fiber treated with an epoxy compound, but at this time, if the viscosity is too high, it causes sticking spots on the fiber, and in order to improve the post-processability of the obtained fiber, it is added to the silicone compound at a low viscosity. It is desirable to use a compatible lubricant together as a diluent. As such a lubricant, for example, a mineral oil having a redwood viscosity of 200 seconds or less, and monobasic acid esters such as isobutyl oleate and isooctyl palmitate are preferably used. In addition,
The mixing ratio of the fluorine-containing amino-modified silicone and the low-viscosity lubricant is arbitrary as long as the object of the present invention is not impaired,
It is desirable that the viscosity after dilution is 60 cm strokes or less at 30 ° C. in order to uniformly adhere to the fiber surface.

Further, in these solutions, the antistatic property is improved,
In order to improve heat resistance, other additives may be added, and an emulsifier may be emulsified with a suitable emulsifier such as alkyl sulfate ester salt, alkylbenzene sulfonate, higher alcohol polyoxyalkylene adduct, sorbitan higher fatty acid ester and the like. You may attach it. However, in this case, it is important that it is non-reactive with the fluorine-containing amino-modified silicone and does not increase the viscosity too much.

In order to improve the adhesion of the compound to the fiber surface, the amount of the fluorine-containing modified silicone added is within the specified range, that is, the epoxy compound / fluorine-containing amino-modified silicone (weight ratio). )
Is preferably 50/50 to 5/95. By doing so, the silicone compound can be firmly adhered to the fiber surface, and the durability of water repellency is improved.
In order to improve the fixation of the silicone compound, it is desirable to perform a heat treatment, usually 110 to 230 ° C. In addition, the rolled pan is used as it is for 50 to 70
You may heat-process at the temperature of 10 degreeC for 10 to 30 hours.

Next, the other surface of the polyester cloth of the present invention (the back side of the surface having the fiber treated with the above-mentioned silicone compound as a main constituent fiber) is coated with a hydrophilic epoxy compound, preferably the fiber. It is important to consist mainly of fibers having a contact angle with water of 50 degrees or less. The method for producing such a fiber is not particularly limited, but similarly to the above, it is sufficient to apply a hydrophilic epoxy compound to the polyester undrawn yarn drawn at a low speed of about 1000 m / min, and then heat draw / heat treat it. The hydrophilic epoxy compound as used herein means a compound in which 70% or more is dissolved when 100 g of the epoxy compound is dissolved in 900 g of water at room temperature, preferably a water solubility of 80% or more.

The epoxy compound used here contains two or more epoxy groups in the molecule, and when the epoxy group content is 0.2 g equivalent / 100 g or more, durable hydrophilic performance is obtained. It is preferable above.

Examples of such epoxy compounds include:
Examples thereof include glyceryl glycidyl ether, polyglyceryl glycidyl ether, sorbitol glycidyl ether, and polyethylene glycol glycidyl ether, and these may be used in combination with a hydrophobic epoxy compound other than those mentioned above as long as hydrophilic performance is not impaired.

When the above-mentioned hydrophilic epoxy compound is applied to the polyester fiber, it is usually an aqueous solution or an emulsion as described above. Since the undrawn yarn to which the hydrophilic epoxy compound is applied is fixed through a hot drawing / heat treatment step, a fiber oil agent such as a smoothing agent and an antistatic agent is used together in order to improve the passage stability in such a step. It is also preferable to use an epoxy curing catalyst such as piperazine in combination to accelerate the fixation. The amount of the catalyst used is usually 0.1 with respect to 100 parts by weight of the epoxy compound.
10 to 10 parts by weight.

Various additives other than the above, for example, an antibacterial agent, an antiseptic agent, a flameproofing agent, etc., may be added to the treatment liquid as long as the object of the present invention is not impaired.

The amount of the hydrophilic epoxy compound applied to the fiber is preferably 0.5 to 1.0% with respect to the weight of the fiber,
Outside this range, the hydrophilicity tends to be insufficient, and the texture of the resulting fabric tends to deteriorate.

The undrawn yarn provided with the epoxy compound is
It is desirable that the film be heat-treated at 110 to 230 ° C. after being heat-stretched. If the heat-treatment temperature is less than 110 ° C., the adhesion of the epoxy compound becomes insufficient and the durability of the hydrophilic performance is apt to be lowered. When it exceeds, the epoxy compound is thermally decomposed and the hydrophilicity is apt to be lowered. In addition, the drawn yarn after the heat treatment should be heated at 50 to 70 ° C.
Aging is preferably performed for 0 to 30 hours, and by doing so, the durability of hydrophilic performance is further improved.

In the present invention, the polyester fiber having the water-repellent property and the polyester fiber having the hydrophilic property described above are used, and the polyester fiber mainly having the water-repellent property is exposed on one surface and the other surface. Therefore, it is necessary to make the cloth mainly having a structure in which polyester fibers having hydrophilicity are exposed. An example of such a fabric structure is a satin fabric designed so that a large amount of polyester fibers having water repellent performance is exposed on one side of the fabric and a large amount of polyester fibers having hydrophilic performance is exposed on the other side. In addition, a double weave and a double knit may be used.

[0027]

The polyester cloth of the present invention has many polyester fibers whose one surface is coated with a fluorine-containing amino-modified silicone via an epoxy compound, and the surface of the polyester cloth is represented by epoxy resin. It is presumed that the compound adheres well to the polyester, and the epoxy compound and the fluorine-containing amino-modified silicone are chemically bonded due to the reaction between the epoxy group and the amino group and firmly adhere to each other, showing extremely good durability. Of.

On the other side of the one cloth, many polyester fibers coated with a hydrophilic epoxy compound appear on the surface, and the hydrophilic performance of the fiber is that the hydrophilic epoxy compound firmly adheres to the polyester. It is presumed to be because of this, and it exhibits extremely good durability.

Further, unlike the case where the fabric of the present invention is coated with the post-processing agent after the fabric is formed, since the film is formed on each fiber, there is no adhesive fixing of the fabric structure by the post-processing agent. It has a soft texture and good permeability to moisture, water and the like.

Therefore, the polyester fabric of the present invention is
Utilizing the characteristics that the hydrophilicity and water repellency are different between the front and back and the durability of each is good, for example, as the material for inner garments such as underwear and sports clothing, the side that comes into contact with the skin becomes the surface with water repellency. When used in, the sweat migrates to the fiber having hydrophilicity on the side opposite to the surface that comes into contact with the skin, avoids the discomfort caused by sweat wetting for an extremely long period of time, and this performance is not likely to deteriorate even after washing. Demonstrate.

[0031]

EXAMPLES The present invention will be described in detail below with reference to examples. In addition, each evaluation item in the examples was based on the following measurement method.

(1) Contact angle After the yarn is scoured according to a conventional method, it is kept at 20 ° C. × 65%.
Under the condition of RH, about 0.004 cc of water was attached to the yarn and measured using a contact angle meter CA-DS type manufactured by Kyowa Scientific Co., Ltd.

(2) Water diffusibility In the same manner as above, about 0.004 cc of water droplets were attached to the yarn after scouring, and the time until the water droplet diffused into the yarn and disappeared was measured.

(3) Water repellency According to the spray test of JIS L 1092 77, the sample was mounted on a tilt table of 45 degrees, sprayed from above, and the water repellency was evaluated from the state of remaining water droplets on the sample. Relative evaluation was carried out by setting 100 as the one without adhesion and wetting on the surface and 0 as showing that the front and back surfaces were completely wet.

(4) Hydrophilicity A sample is attached to a glass plate, placed horizontally, and water drops 0.01
After dropping ˜0.02 cc, the time until it was diffused into the sample and disappeared was measured.

(5) Washing treatment Using an electric washing machine for home use (NA-680L manufactured by National), 2 g / L solution of new enzyme Zab (manufactured by Kao Co., Ltd.) was used.
Into a liter, a cotton cloth was added together with the sample so that the bath ratio became 1:30, and the mixture was washed with 30 liters of warm water at 40 ° C. for 5 minutes for hot water dehydration, and overflow water washing for 10 minutes, dehydration, and air drying. This treatment was repeated 5 times to obtain 5 times of washing, and the water repellency was evaluated.

(6) Dry cleaning treatment The dry cleaning treatment is carried out by the method specified in JIS-0844.
Water repellency was evaluated by repeating dry cleaning 5 times.

(7) Friction treatment In accordance with the friction fastness test of JIS-L-0849, the same sample as the sample to be rubbed and moistened with distilled water was mounted on the sample table and used as a friction cloth on the contact surface of the friction element. Installation, 2
It was rubbed 20 times with a load of 00 g, and the water repellency of the friction portion of the friction cloth was evaluated.

[0039]

Examples 1 to 12 Comparative Examples 1 to 3 Spinning speed 1000 m /
Min. Spun into 260 de / 36 fil undrawn yarn
The described epoxy compound treating agent was applied as a 10% emulsion. The applied amount at this time was 0.3% based on the fiber weight as the amount of active ingredient. This fiber is further 120 ℃
Was hot-stretched to obtain a 75 de / 36 fil drawn yarn.

To the drawn yarn obtained in No. 1 of Table 1, the silicone treating agent of Table 1 was applied so that the ratio of epoxy compound / fluorine-containing amino-modified silicone was 20/80, and heat treatment was carried out at 120 ° C. After that, it was wound up. This fiber is
Further, the wound package was treated in an atmosphere of 60 ° C. for 24 hours to complete the reaction between the epoxy compound and the silicone compound.

[0041]

[Table 1]

[0042]

[Table 2]

The hydrophilic yarn and the water-repellent yarn thus obtained were formed into a woven fabric having the structure shown in Table 3, and after scouring and heat setting according to a conventional method (Table 4), The following dyeing and reduction washing were performed.

[0044]

[Table 3]

[0045]

[Table 4]

The resulting woven fabric was evaluated for hydrophilicity and water repellency durability. The results are shown in Table 5,

[0047]

[Table 5]

From these results, it is clear that the polyester cloth of the present invention exhibits excellent durability and water repellency on one side, and the other side exhibits excellent durability and hydrophilicity.

Claims (3)

[Claims] 1. A fabric made of polyester fibers in which the main constituent fibers on one surface of the cloth and the main constituent fibers on the other surface are different from each other, wherein the main fibers constituting one surface are fluorine-containing via an epoxy compound. A polyester cloth characterized by being coated with an amino-modified silicone compound and having a main fiber constituting the other surface coated with a hydrophilic epoxy compound. 2. The water solubility of the hydrophilic epoxy compound is 80%.
The polyester cloth according to claim 1, which is the above. 3. The contact angle between the fiber coated with the fluorine-containing amino-modified silicone compound and the water via the epoxy compound is 65 degrees or more, and the contact angle between the fiber coated with the hydrophilic epoxy compound and the water is 50 degrees. The polyester fabric according to claim 1, which is as follows.