JP2000265343A - Wiping cloth and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiping cloth having soft feeling while a knitted fabric composed mainly of a polyester, having excellent dimensional stability without a fray of a cut face, having excellent wiping property and wiping operability, and excellent in an industrial washing durability and having high antibacterial property and a method for producing the cloth. SOLUTION: This wiping cloth is constituted of a conjugated yarn comprising twisted polyester ultrafine fibers having <=0.5 de single fiber size and polyester thick denier fibers having >=1.0 de single fiber size. Both of the fibers are composed of polyester high density knitted fabric forming entanglement with each other and the fibers contain a pyridine-based antibacterial agent. The wiping cloth is produced by treating a knitted fabric obtained by knitting a conjugated yarn comprising a false-twisted polyester conjugate fiber having sea-and-island structure in which a fiber size of the island component is <=0.5 de and highly shrinkable polyester fibers in hot water, removing the sea component, supplying a pyridine-based antibacterial agent and subjecting the surface of the resultant knitted fabric to water jet processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping cloth having an excellent antimicrobial performance with excellent industrial washing durability, which has a high contaminant wiping or adsorbing effect, and a method for producing the same.

[0002]

2. Description of the Related Art With the rapid progress of the electronic information society, wiping cloths with high contaminant removal performance are required not only for conventional glasses and lenses but also for cleaner screens of electronic machines represented by liquid crystal screens. Is done. Conventional cotton and paper cannot be used as wiping cloths in fields that dislike feathers and dust. Further, the cloth is used not only in the electronic information society but also in general homes and hospitals, and a wiping cloth having excellent washing durability and high antibacterial property is required.

[0003] In recent years, fabrics using ultrafine fibers have been proposed as wiping cloths. For example, a wiping cloth characterized by the sublimeness of a cloth made of ultra-fine fibers of 0.9 denier or less has been proposed in JP-A-61-103428. An entangled knit made of denier fiber and a method for producing the same have been proposed in JP-A-63-213364.

[0004] However, in the fabrics proposed in JP-A-61-103428 and JP-A-63-213364,
Not only is the hand hard, but there are also drawbacks such as excessive slippage of the glass-based material, and poor wiping workability without slippage. Knitted fabrics also have a drawback that they are deformed after being stretched due to deformation or laughter due to the magnitude of elasticity peculiar to the knitted fabric. There were also problems such as excessive slippage and insufficient wiping properties due to the roughness of the mesh.

In recent years, wiping cloths have been increasingly used in general homes and hospitals, and particularly in hospitals, especially in hospitals, methicillin-resistant Staphylococcus aureus (hereinafter referred to as MRS).
Nosocomial infection due to A) is a problem. In such hospitals, industrial washing at 60 to 85 ° C. is usually repeated many times, so that those having sufficient durability are hardly obtained by the conventional technology.

[0006]

SUMMARY OF THE INVENTION In view of the background of the prior art, the present invention is a polyester-based knitted fabric that has a soft feel, excellent dimensional stability, no fraying of the cut surface, and a wipe. An object of the present invention is to provide a wiping cloth having good antibacterial properties, which has good takeoff properties and wiping workability, and has excellent industrial washing durability, and a method for producing the same.

[0007]

The present invention employs the following means in order to solve the above-mentioned problems. That is, the wiping cloth of the present invention is composed of a composite yarn composed of a temporary twisted polyester ultrafine fiber having a single yarn fineness of 0.5 denier or less and a polyester thick fineness fiber having a single yarn fineness of 1.0 denier or more. Both fibers are made of a high-density knitted polyester fabric entangled with each other, and the fibers contain a pyridine-based antibacterial agent. A method for producing such a wiping cloth is a knitted fabric formed by knitting using a composite yarn comprising a polyester composite fiber temporary twisted yarn having a sea-island structure in which the fineness of an island component is 0.5 denier or less and a high shrinkage polyester fiber. Is treated in hot water to remove sea components, a pyridine-based antibacterial agent is applied, and then the surface of the knitted fabric is subjected to water jet processing.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The object of the present invention is to achieve the above-mentioned objects, that is, the feel is soft, the dimensional stability is excellent, the cut surface is not frayed, the wiping property and the wiping workability are good, and The wiping cloth with high antibacterial properties, which has excellent washing durability, is studied diligently, knitting a specific composite yarn, and combining this with entanglement treatment and processing with a specific antibacterial agent called a pyridine-based antibacterial agent. When I made a wiping cloth made of a knitted material, it was surprisingly found that the problem could be solved all at once.

[0009] The material constituting the wiping cloth of the present invention is a polyester ultrafine fiber which has been temporarily twisted and has a single yarn fineness of 0.5 denier or less and 1.0 denier or more. Preferably, it is made of 2.0 to 4.0 denier polyester fine fiber. The fineness of such ultrafine fibers is preferably 0.3 denier or less, more preferably 0.2 denier.
To 0.01 denier, particularly preferably 0.1 to 0.02
A denier range is used. On the other hand, when the fine fiber having a fineness of less than 1.0 denier is used as the large fineness fiber, the knitted fabric is composed of only the thin fibers, and the knitted fabric has a firmness and a firm feeling. In addition, lack of dimensional stability causes "laughter" peculiar to the knit.

Further, in the present invention, the composite ratio of the composite yarn composed of the ultrafine fibers and the large fineness fibers is such that
It is a factor that determines the texture and wiping properties,
The total fineness of the ultrafine fibers is preferably at least larger than the total fineness of the fineness fibers, more preferably 50 to 80% by weight of the ultrafine fibers,
Particularly preferably, the content is 60 to 70% by weight. Therefore, the fine fiber having a denier of 1.0 denier or more occupies the remaining portion. It is preferable that such large fineness fibers are raw silk that has not been subjected to temporary twist processing or the like.
In addition, such a large fineness fiber, in a state before heat treatment,
Those having higher shrinkage characteristics than microfibers are preferred. Although the shrinkage ratio is not particularly limited, it is preferable that the shrinkage property to heat is larger than that of the ultrafine fibers. Specifically, the boiling water shrinkage of the ultrafine fibers is 4 to 8%, while the fineness fibers are 10 to 25%.
% Shrinkage is preferably used. In particular,
Those having a shrinkage ratio of 4 to 8% larger than the boiling water shrinkage ratio of the ultrafine fibers are preferably used. In other words, when the fine fiber has a larger shrinkage than the ultrafine fiber due to heat treatment such as dyeing, the difference in shrinkage causes the ultrafine fiber to be arranged in a relaxed state around the fine fiber after heat treatment. , Resulting in bulkiness. The difference between the two yarn lengths is that the ultrafine fibers are preferably 3
% Or more.

On the other hand, as the ultrafine fibers, those which have been crimped by temporary twisting are preferably used. This temporary twist crimping has the effect of disturbing the arrangement of single fibers one by one and increasing the sublimeness of the surface of the knitted fabric.

[0012] The density of the knitted fabric constituting the wiping cloth of the present invention is the total number of single fibers of ultrafine fibers and large fineness fibers of the composite yarn, and both wells and courses can be present at a high density of 25,000 fibers / in or more. preferable. More preferably 30
It is present at a density of 000 to 50,000 lines / in. For example, if the density of the composite yarn composed of ultrafine fibers of 650 filaments and large fineness fibers of 80 denier is 60 yarns / in,
It is considered to be composed of a total number of single fibers of 39000 fibers / in. Here, the total number of single fibers is 25,000 fibers /
If it is less than in, the knitted fabric becomes soft and waistless, and the wiping properties are poor. From the viewpoint of wiping properties, the greater the total number of single fibers, the better. However, there is no one having an infinitely high density from the viewpoint of texture, wiping workability, and the degree of the gap between the yarns.

Further, the disorder of the arrangement of the single fibers constituting the knitted fabric can result in a wiping cloth having no directional wiping property. This arrangement disorder does not necessarily occur, but can be efficiently obtained by water jet processing the surface of the knitted fabric.

The wiping cloth of the present invention has good dimensional stability despite the knitted fabric. That is, a knitted fabric whose dimensional change due to dry heat treatment at 160 ° C. and washing is preferably 5% or less, more preferably 3% or less usually has a large dimensional change due to heat, and it is difficult to suppress it to 5% or less. However, the knitted fabric of the present invention has a shrinkage characteristic of the material, a combination of ultrafine fibers and ordinary fibers, and a manufacturing method utilizing the characteristics, and despite the knitted fabric, a wiping made of a polyester knitted material having a stable dimension. Cross can be provided.

The quality of the wiping cloth is determined not only by the dirt wiping performance but also by the fact that the wiping operability is important, and it is determined that the wiping cloth is related to the frictional resistance between the sheet glass and the wiping cloth. It has been found that the wiping cloth of the present invention has an appropriate friction resistance. In order to determine the wiping workability, the friction resistance between the wiping cloth and the glass plate under a load of 1 kg / 35 cm ² was 400 to 90.
A wiping cloth having excellent wiping properties in the range of 0 g can be provided.

The wiping cloth of the present invention has also been found that the thickness of the cloth largely depends on the wiping property, and that the cloth having a range of 0.4 to 0.8 mm has excellent wiping property and handling. In particular, a cloth having a thickness of 0.5 to 0.7 mm exhibits more preferable wiping properties and handling.
When the thickness of the cloth is less than 0.4 mm, dirt cannot be sufficiently absorbed. On the contrary, when the thickness exceeds 0.8 mm, poor handling property results.

The wiping cloth of the present invention is also characterized in that it has an antibacterial property excellent in industrial washing durability. Conventionally, fabrics imparted with antibacterial properties have been examined in general clothing fabrics and the like, and water washability at home has reached a considerable level.
No one exhibiting sufficient durability under a method in which industrial washing at 60 to 85 ° C. is repeated many times has not been found. In particular, a hospital wiping cloth is a cycle of wiping / washing dirt, and requires durability that cannot be imagined with general clothing cloth. According to the present invention, it is possible to provide a product exhibiting sufficient durability even under such a condition that industrial washing is repeated many times.

In order to impart such antibacterial performance excellent in industrial washing durability, a specific antibacterial agent called a pyridine-based antibacterial agent and a large fineness fiber are effectively used. The antibacterial agent that is exhausted by the polyester fiber is easily exhausted as the fiber becomes thicker, and contributes to the durability accordingly. Moreover, the above-mentioned pyridine-based antibacterial agents have remarkably excellent affinity with polyester and have excellent durability.

Examples of such pyridine antibacterial agents include 2-chloro-6-trichloromethylpyridine, 2-chloro-4-trichloromethyl-6-methoxypyridine,
2-chloro-4-trichloromethyl-6- (2-furylmethoxy) pyridine, di (4-chlorophenyl) pyridylmethanol, 2,3,5-trichloro-4- (n-propylsulfonyl) pyridine, 2-pyridylthiol -1-Zinc oxide, di (2-pyridylthiol-1-
Pyridine compounds such as oxides) can be used. Among such pyridine-based antibacterial agents, 2-pyridylthiol-1-oxide zinc is particularly excellent, and is preferably used because it has a property of being exhausted by polyester-based fibers with remarkable durability.

As the pyridine-based antibacterial agent, those having a small average particle size are preferably used from the viewpoint of exhaustion, and more preferably those having an average particle size of 2 μm or less are used.

Next, an example of a method for manufacturing a wiping cloth according to the present invention will be described.

The present invention also provides a wiping cloth comprising a temporary twisted yarn of a low shrinkage polyester composite fiber filament having a sea-island structure having an island component of 0.1 denier or less and a high shrinkage polyester raw yarn of a large fineness fiber. Then, the knitting of the composite yarn fluid-entangled with the air nozzle by a circular knitting machine with an interlock method as a green machine, this green machine is treated with hot water,
Remove sea components. By removing this sea component,
Ultrafine fibers of 0.1 denier or less can be obtained. For the removal of such sea components, treatment in the presence of an alkali is effective, preferably using sodium hydroxide. In addition, the temporary twisting process can usually use a wooly process.

The method for producing the knitted material may be any method, but a circular knitting interlock method is preferably used in terms of productivity, prevention of fraying of cutting, and the like.

The method of entanglement of the ultrafine fibers can be achieved by provisional twisting or compounding by fluid entanglement of the ultrafine fibers and high shrinkage raw silk. Is what is done. That is, the fabric after the sea removal is subjected to antibacterial processing at the same time as dyeing, and then a method of injecting a fluid of 490 to 980 Pa into the surface of the fabric through a small hole separates the ultrafine fibers one by one and emerges on the surface of the fabric. Let it do. The function of selectively embossing the ultrafine fibers on the surface of the fabric is due to the action of the large fineness fibers having a higher shrinkage ratio than the ultrafine fibers. In other words, by water jet processing, the fibers disturb the arrangement, become a random arrangement, the high shrinkage yarn having a large single fiber fineness selectively forms the inner layer portion, and the ultrafine fibers having a small single fiber fineness form the surface layer portion. As a result, a wiping cloth having a swelling feeling can be formed.

Next, the pyridine-based antibacterial agent can be applied by a method in which the pyridine-based antibacterial agent is applied simultaneously with the dye at the time of normal dyeing of the polyester fiber. That is, a disperse dye and the antibacterial agent are used at the same time and applied by a high-temperature dyeing method at 120 ° C. to 135 ° C. At this time, the rate of temperature rise is preferably 0.5 to 2.0 ° C./min from the viewpoint of dyeing properties of the ultrafine fibers.

The knitted fabric to which the antibacterial agent has been applied is subjected to water jet processing, dried and finish set. If necessary, even if an antistatic treatment or a water-absorbing treatment is applied, it does not adversely affect the wiping property and does not matter.

[0027]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples. The percentages and parts in the examples are on a weight basis unless otherwise specified. The quality evaluation in the examples was performed according to the following method. (1) Washing method Using a drum dyeing machine, Kao Corporation detergent "Zab" 2 g /
1, hydrogen peroxide solution (35% industrial use) 3 cc / l, sodium percarbonate 1.5 g / l, temperature 85 ± 2 ° C., bath ratio 1: 2
After washing at 0 for 15 minutes, and after drainage and dehydration, overflow washing was performed for 10 minutes. After washing with water, it was dried for 20 minutes using a tumbler dryer. This was one wash. (2) Antibacterial test method A unified test method was adopted as the test method, and MRSA clinical isolates were used as test cells. The test was performed by pouring a bouillon suspension of the test bacterium on a sterile sample cloth and placing the suspension at 37 ° C in a sealed container.
After 8 hours of culture, the number of viable cells was counted, and the number of cells relative to the number of cultured cells was determined.

Under the condition of log (B / A)> 1.5,
g (B / C) was defined as the difference in the number of bacteria, and 2.2 or more was regarded as a pass level. Here, A indicates the number of bacteria collected and dispersed immediately after inoculation of the unprocessed product, B indicates the number of bacteria collected and dispersed after 18 hours of culturing of the unprocessed product, and C indicates the number of bacteria collected and dispersed after culturing the processed product for 18 hours. (3) Wiping property evaluation method Silicone oil SH200 (Dow Corning Toray)
Silicone Co., Ltd.) was dropped on a glass plate of about 5 mg with a syringe needle and placed on one end of a cylindrical load having a diameter of 45 mm and a weight of 1 kg.
A sample (wiping cloth) fixed via a woven fabric having a thickness of 1 mm is placed on a glass plate and moved at a speed of 10 cm / min to wipe off the silicone. Next, the toner for a dry copying machine is sprinkled on a glass plate, and the toner is blown off with compressed air (1 kg / cm ² ). A cellophane tape (registered trademark, manufactured by Sekisui Chemical Co., Ltd.) is adhered to the surface of the glass plate, the residual toner on the glass plate is peeled off, and the degree of the toner adhered to the cellophane tape is determined.

A toner to which no toner is attached (a glass plate completely wiped with silicone) is grade 5;
The toner having an extremely large amount of remaining toner was classified as first class and visually judged in five steps. (4) Evaluation method of wiping workability, texture and degree of laughter Sensory evaluation was performed. The evaluation criteria are as follows.

[0030]

[Table 1]

The ultrafine fiber is 50 denier 9 filaments,
[70 islands / filament: Toray Industries, Inc.] Sea-island type polyester with an island component of polyethylene terephthalate, a sea component of which is a copolymer of terephthalic acid and pentasodium sulfoisophthalic acid as an acid component of the polyester; Fiber (sea-island ratio is 2
0/80) was used. The boiling water shrinkage of this yarn is 5.8%
Met. As the high shrinkage raw yarn, a 30-denier 12-filament polyester yarn [manufactured by Toray Industries, Inc.] was used. This shrinkage was 13.8%. On the other hand, provisional twist processing (temporary twist number: 300 T / M, temperature: 1) without removing ultrafine fibers from the sea
80 ° C) yarn and high shrinkage raw yarn are aligned and air entangled (overfeed ratio of ultrafine yarn: 2%, air pressure: 29.4 Pa)
) To obtain a composite yarn. In addition, circular knitting machines (32G, 36
Inches) were used to form a greige machine by interlocking. This greige was once treated with hot water at 130 ° C. for 20 minutes and further treated at 80 ° C. for 60 minutes in the presence of 1% sodium hydroxide to completely remove sea components. Then, at the time of dyeing of ordinary polyester, 0.5% owf of 2-pyridylthiol-1-oxide zinc was added simultaneously with the dye, and the dye was processed at the same time. Next, water jet processing was performed from the surface at a pressure of 980 Pa. Thereafter, heat setting was performed at 130 ° C., and the number of wells and courses was set to 60 lines / in. The ratio of the ultrafine fibers in the obtained knitted fabric was 65% by weight, and the single fibers mainly composed of the ultrafine fibers were about 35,000 in both the well course and the well course.
It was a high density knitted fabric of book / in or more. The basis weight is 210 g / m
^{In 2} , the greige shrunk to 68% in width and 72% in length. However, the dry heat shrinkage at 160 ° C. of the product is 1.
The wiping cloth had dimensional stability of 6% and a washing shrinkage of 2% or less.

The appearance was like a chamois, losing the structure of the knit, and the texture was supple. There was no laugh due to stretching. Comparative Example 1 In the same manner as in Example 1, a knitted fabric composed of a composite yarn was prepared by the same method up to antibacterial processing simultaneously with dyeing.
(1-Jodomethylsulfanyl) benzene was used]. Next, it was finished without water jet processing. The texture was supple and rich in elasticity, but laughter was large and lacked dimensional stability. The antibacterial property exhibited a low performance of 1.0 before washing, and was inferior to 0.1 after 50 times of industrial washing. Comparative Example 2 6- (2-thiophenecarbonyl) was used as an antibacterial agent which was processed in the same manner as in Example 1 by using the same sea-island-type polyester as in Example 1 but not subjected to temporary twist processing, and using a yarn in which high-shrink raw silk was aligned. ) -1H-2-Benzimidazole methyl carbamate was used. The weight of the obtained knitted fabric is 195 g / m ^2.
Although the appearance was similar to that of a chamois, the laughter caused by the expansion and contraction was somewhat lacking in the volume feeling. The antibacterial property was low at 1.8 before washing, and was poor at 0.1 after 50 times of industrial washing. Comparative Example 3 An antibacterial agent processed in the same manner as in Example 1 using only the yarn obtained by pulling the high-shrink yarn alone from Example 1 with two yarns was used as an antibacterial agent.
-Chloro-2-methyl-4-isothiazolin-3-one was used. The resulting knit was hard and lacked flexibility. The antibacterial property showed a high performance of 4.5 before washing, but was inferior to 0.5 after 50 times of industrial washing.

Table 1 shows the wiping properties and the properties of the fabrics and the antibacterial properties of Example 1 and Comparative Examples 1 to 3.

[0034]

[Table 2]

As is evident from Table 1, the fabric of Example 1 has excellent wiping properties, wiping operability and texture, has no laughter, and has antibacterial performance even after about 50 industrial washings. High antibacterial performance was obtained. In the case of Comparative Example 1 which was not subjected to the water jet processing, the fiber shrinkage was insufficient, and the fiber separation property of the ultrafine yarn was poor, so that laughter was strong, there was a problem in practical use, and the antibacterial performance was insufficient. . Comparative Example 2 lacks entanglement between single fibers, has little volume feeling,
There were drawbacks in wiping workability and laughter, and antibacterial performance was insufficient. In Comparative Example 3, the high shrinkage yarn alone was used, the single yarn fineness was large, the wiping property was poor, and the initial antibacterial performance was good, but the durability was insufficient.

[0036]

According to the present invention, a moderate volume feeling can be obtained.
It is possible to stably provide a wiping cloth having friction resistance and texture, excellent wiping properties, wiping workability, and antibacterial performance excellent in industrial washing durability, such glasses, lenses It can be suitably used as a material for wiping oil films and dirt on liquid crystal materials, electronic information materials, equipment, pearls, jewelry, furniture, automobile windows and the like.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D04B 1/16 D04B 1/16 21/00 21/00 B D06M 11/38 D06M 13/355 13/355 D06M 5/02 E // D06M 101: 32 F term (reference) 4L002 AA07 AB04 BA01 BB01 DA03 EA00 EA05 FA00 FA06 4L031 AA18 AB08 AB11 AB33 BA11 BA34 BA37 CA01 CA07 DA00 DA03 DA12 4L033 AA07 AB02 AB06 AC10 AC15 BA57 DA07 4L33 MA39 PA05 PA41 PA46 RA03 UA08 4L041 BA04 BA05 BA16 BC05 BD14 BD20 CA06 CA12 DD01 DD11 DD15 EE15 EE20

Claims (12)

[Claims] 1. A composite yarn comprising a temporarily twisted polyester microfine fiber having a single yarn fineness of 0.5 denier or less and a polyester thick fineness fiber having a single yarn fineness of 1.0 denier or more, both of which are mutually A wiping cloth comprising a high-density knitted polyester fabric in which entanglement is formed, and wherein the fibers contain a pyridine-based antibacterial agent. 2. The composite yarn contains 50 to 80% by weight of the ultrafine fiber, and the high-density knitted fabric has a total number of single fibers of the ultrafine fiber and the fineness fiber, and is a well and a course. 2. The wiping cloth according to claim 1, wherein the wiping cloth is constituted by 25,000 pieces / in or more. 3. The wiping cloth according to claim 1, wherein the ultrafine fibers have a yarn length difference of 3% or more longer than the thick fineness fibers. 4. The wiping cloth according to claim 1, wherein said wiping cloth has a dry heat shrinkage at 160 ° C. and a washing shrinkage of 5% or less. 5. The wiping cloth is 1 kg / 35 cm.
The wiping cloth according to any one of claims 1 to 4, wherein the friction resistance under ^two loads is in the range of 500 to 900 g. 6. The high-density knitted fabric according to claim 1, wherein the high-density knitted fabric is a circular knit.
A wiping cloth according to any one of claims 1 to 5. 7. The high fineness fiber has a boiling water shrinkage in the range of 10 to 25%, and the high-density knitted fabric has a thickness of 0.4 to 0.8 mm. The wiping cloth according to any one of the above. 8. The wiping cloth according to claim 1, wherein the pyridine-based antibacterial agent is 2-pyridylthiol-1-oxide zinc. 9. The wiping cloth according to any one of claims 1 to 8, wherein the wiping cloth has an antibacterial performance of about 2.5 or more after about 50 industrial washings. 10. A knitted fabric formed by knitting using a composite yarn consisting of a polyester composite fiber provisionally twisted yarn having a sea-island structure in which the fineness of the island component is 0.5 denier or less and a high shrinkage polyester fiber, A method for producing a wiping cloth, comprising: treating in water, removing a sea component, applying a pyridine-based antibacterial agent, and then subjecting the surface of the knitted fabric to a water-jet process to perform an entanglement treatment. 11. The application of the pyridine-based antibacterial agent is performed by immersing the knitted material in a liquid containing the antibacterial agent, and applying a pressure of 100 ° C. to 100 ° C.
The method for producing a wiping cloth according to claim 10, wherein the treatment is performed in a liquid at 150 ° C. 12. The method for producing a wiping cloth according to claim 11, wherein the pyridine-based antibacterial agent is 2-pyridylthiol-1-oxide zinc.