JPH06235166A - Production of wiping cloth - Google Patents

Abstract

PURPOSE:To produce wiping cloth free from drop of handle, capable of catching a very small stain, by using ultra-fine fibers. CONSTITUTION:Polyester multifilament yarn of 70/D48F composed of slit type polyester-based yarn prepared by bonding polyester-based ultra-fine yarn having a modified cross section with acute angles, 0.05-0.3 denier fineness and 10-50% shrinkage percentage in water with a polyester-based binder is woven or knitted, then the split type polyester-base fiber is split and the fabric is shrunk to give wiping cloth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping cloth suitable for removing extremely small stains adhering to spectacle lenses, optical lenses and the like.

[0002]

2. Description of the Related Art A wiping cloth made of ultrafine fibers has been conventionally used to remove stains on eyeglass lenses and the like. Since the ultrafine fibers capture the extremely small amount of dirt, a wipe cloth made of the ultrafine fibers is suitable as a wipe cloth for eyeglass lenses and the like.

However, conventionally used wiping cloths made of ultrafine fibers have a drawback that the texture is too soft. In particular, when the wipe is a knitted fabric, it is sometimes too soft to adhere to the lens when wiping an eyeglass lens or the like, which makes it difficult to wipe.

Furthermore, the cross-sectional shape of the ultrafine fibers is circular or elliptical, and there is a problem that it is still impossible to capture extremely small amounts of dirt. That is, even if the dirt is wiped with a round stick, it is difficult to completely remove the extremely small dirt, and the dirt may be rubbed on the spectacle lens.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, and uses an ultrafine fiber to produce a wiping cloth which does not have a texture and which can capture an extremely small amount of dirt. It is intended to provide a method.

[0006]

The present invention achieves the above-mentioned object and has the following structure. That is, the present invention is a polyester-based ultrafine fiber having a cross-section of a modified shape having at least one acute angle, a fineness of 0.05 to 0.3 denier, and a hot water shrinkage of 10 to 50%. A split-type polyester fiber obtained by joining a plurality of pieces with a bonding agent, and a fabric using a yarn composed of a split-type polyester fiber in which the alkali solubility of the polyester-based bonding agent is higher than that of the polyester ultrafine fiber. The present invention is directed to a method for manufacturing a wiping cloth, which comprises knitting, weaving, and then subjecting the split-type polyester fiber to a split treatment and shrinking the fabric.

The present invention will be described in detail below. In the present invention, a split type polyester fiber is used in which a plurality of polyester ultrafine fibers are joined by a polyester binder. For example, a split type polyester fiber as shown in FIG. 1 is used. The split-type fiber shown in FIG. 1 is a polyester ultrafine fiber (a) having a wedge-shaped cross section.
And a polyester-based bonding agent (b) for bonding the polyester-based ultrafine fibers (a).

As the composition of this yarn, the polyester type ultrafine fiber (a) is made of a polyester polymer which is hardly soluble in alkali, and a polyester type binder (b) is used as the polyester binder (b). The one formed by coalescence is used. By using this split type polyester fiber and immersing it in an alkaline aqueous solution to remove only the polyester binder (b), a polyester microfiber (a) having a wedge-shaped cross section as shown in FIG. 2 is obtained. Be done.

The degree of splitting of the splittable polyester fiber can be known by the alkali weight loss rate when a cloth made of this fiber is dipped in an alkaline aqueous solution. When the cloth is treated with an alkaline aqueous solution and the alkali weight loss rate is smaller than the proportion of the binder in the splittable polyester fiber, the yarn is not sufficiently divided, and the uneven hue and texture become rough and hard. It is not preferable because it causes a decrease in degree. Further, if the alkali weight loss ratio greatly exceeds the proportion of the bonding agent, the ultrafine fibers are also corroded, so that the strength of the obtained wiping cloth is reduced.

The cross section of the polyester type ultrafine fibers used in the present invention is a profile having at least one acute angle. Ultrafine fibers having a modified cross section with at least one acute angle can be easily obtained by using the split type fiber shown in FIG. Particularly preferably, it has a wedge shape having at least one acute angle of 20 to 45 °. If it exceeds 90 °, the wiping performance is poor, and if it is 10 ° or less, it is difficult to obtain it from the technical point of view of manufacturing the raw yarn.

Since the cross section of the polyester type ultrafine fiber is a shape having at least one acute angle, the dirt adhered on the spectacle lens or the like is better captured and the dirt is removed from the lens than the one having a circular cross section. Can be removed well.
For example, when removing stains on a table, it is the same principle that the stains can be removed better by rubbing with a sharp object such as a scraper than rubbing with a round bar.

The fineness of the polyester type ultrafine fibers used in the present invention is 0.05 to 0.3 denier. If the single yarn fineness is less than 0.05 denier, it is difficult to obtain realistically,
If it exceeds 0.3 denier, it becomes difficult to remove the minute stains adhering to the spectacle lens or the like, which is not preferable.

The hot water shrinkage of the polyester ultrafine fibers used in the present invention is 10 to 50%. Hot water shrinkage is 10
If it is less than%, the shrinkage of the wiping cloth in the hot water treatment becomes insufficient, so that it is not possible to impart sufficient tension and stiffness to the texture of the finished product of the wiping cloth, and the hot water shrinkage rate is 50%. If it exceeds, the shrinkage of the wiping cloth is too large, the wiping cloth has irregularities, and the texture of the wiping cloth becomes coarse and hard, which is not preferable.

The method of calculating the hot water shrinkage ratio is as follows. Fix the fiber once and apply an initial load of 1/10 g / d to the other end, measure 500 mm correctly and mark 2 points. After this, an initial load is applied, and after soaking in boiling water for 30 minutes, it is taken out, lightly blotted with paper or a cloth to remove water, and naturally dried in a horizontal state. After that, the initial load is applied again to achieve the length Lmm between the two points. The measurement of Lmm is performed 10 times each, the shrinkage rate is calculated by the formula [(500-L) / 500] × 100, and the average value thereof is taken as the hot water shrinkage rate (%).

As the alkali-insoluble polyester polymer of the polyester ultrafine fiber (a), 85 mol% or more of polyester having an ethylene terephthalate structural unit,
Or there is a metal salt copolyester of isophthalic acid. This copolymer has 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane and its ethylene oxide adduct in the main chain of polyethylene terephthalate, and includes diethylene glycol, 1-4-
Butanediol, 2,2-bis [4- (β-hydroxyethoxy) phenyl] sulfone and other diol compounds, adipic acid, azelaic acid, isophthalic acid and other dicarboxylic acid compounds, 4-hydroxybenzoic acid and other hydroxycarboxylic acid compounds May be copolymerized in such an amount that the amount of the copolymerization component is 15 mol% or less.

As the polyester polymer of the polyester binder (b), which is easily soluble in alkali, it is compatible with the above-mentioned polyester polymer which is hardly soluble in alkali and has an alkali weight loss rate of 2 to 10. The polyester is not particularly limited as long as it is a double speed polyester, but an appropriate amount of polyalkylene glycol as a polyethylene terephthalate component, 2,2 bis [4- (β-hydroxyethoxy) phenyl] propane and its ethylene oxide adduct, a metal sulfonate-containing ester, Further, it can be obtained by copolymerizing or adding an anionic surfactant alone or in combination. Above all,
In polymer polymerization, the average molecular weight is 600 to 10,000
The polyester obtained by copolymerizing 10 to 30% by weight of polyethylene glycol and 1 to 3 mol% of 5-sodium sulfoisophthalic acid is preferably used from the viewpoints of alkali weight loss rate and thermal stability.

The dough is knitted or woven using the yarn composed of the split type polyester fibers formed by joining the polyester ultrafine fibers described above. When the wipe according to the present invention is a knit, it is mainly knitted by a single knitting machine, a double knitting machine, a tricot knitting machine or the like. Gauge is 20-40
The gauge may be in the range of gauge, but preferably 28 to 36 gauge.

The knitting structure is preferably such that the front and back surfaces of the knitted fabric have the same structure due to the surface feeling of a plain system. For example, an interlock structure or a tuck reversible structure that is knitted by a double nit machine is more preferable.

As the woven fabric, a woven fabric having no unevenness is preferred, and a plain weave is most preferred.

After the dough is obtained, the split type polyester fibers present in the dough are subjected to a splitting treatment and a shrinking treatment. The split-type polyester-based fiber is a polyester-based ultrafine fiber formed of an alkali-insoluble polyester-based polymer, which is bonded by a polyester-based bonding agent formed of an alkali-soluble polyester-based polymer. If the obtained dough is dipped in an alkaline aqueous solution to remove only the polyester-based bonding agent, it is possible to carry out the division treatment. Further, the shrinking treatment can be performed simultaneously with the splitting treatment, but if the heat treatment in the splitting treatment is insufficient, it is further treated with hot water to shrink the polyester ultrafine fibers or splittable polyester fibers.

When the wiping cloth according to the present invention is subjected to dyeing processing, it may be carried out in accordance with a generally used dyeing processing method for polyester fibers. In addition, it does not make a difference even if it is raised, embossed, or printed.

In general, ultrafine fibers are difficult to be dyed in deep colors, lack in vividness of hue, and difficult to obtain a desired hue, and when trying to obtain a desired hue, a large amount of dye is required, As a result, the dyeing fastness was deteriorated. However, since the yarn used in the present invention is a highly shrinkable yarn, the homogeneity of the molecular chain is lowered, and therefore the crystallinity is lowered and the amorphous portion is increased. Therefore, the dyeing property is higher than that of a normal polyester, and a hue and high fastness which are not problematic in practical use can be obtained by using a dye recipe which is usually and commonly used.

[0023]

According to the method for producing a wipe of the present invention, the fabric is knitted and woven using a yarn composed of a specific splittable polyester fiber, and then the splittable polyester fiber is split and treated. The dough is shrunk. The wipe obtained by these means produces the following characteristics from the composition of the yarn. Since the cross section of the yarn used in the present invention has a shape with at least one acute angle, it is a wiping cloth that is excellent in dust removability and that has good wiping operability and does not generate dust. In addition, since the hot water shrinkage rate of this yarn is 10 to 50%, the fabric shrinks when it is finished and processed after weaving and knitting, resulting in a high-density fabric, which greatly improves the texture texture and tension. Thus, it is possible to obtain a wiping cloth made of ultrafine fibers that is rich in waist.

[0024]

EXAMPLES The present invention will be specifically described below with reference to examples. The wiping property and the color development of the cloth in the examples were evaluated by the following methods. [Wipeability] Pre-soaked in water containing synthetic detergent overnight or more,
After cleaning with a cleaning agent, washing with water, removing water, air-drying, and then using a beautiful cloth, cut glass for microscopes (75 mm x 26
mm × 1 mm thickness) 1 mg / cm ² of grease (Kanai Important Industry Co., Ltd. for high speed ring travelers, NO20-300
Apply 4 cm ^{2 of} 0), and after 30 minutes, cut one sample of width 3 cm × length 30 cm from the sample for measurement and put it on the index finger 1
Wrap it around, wipe the surface and display the number of times until it becomes beautiful. The method is to remove grease on the glass surface for the first time and then remove grease on the new surface of the sample for the second time.
The third time is also performed on the surface of the new sample, and the remaining oil film on the glass surface is confirmed. If not removed, wipe on the same side up to 10 times. [Fabric color development] Digital colorimetric color difference meter (manufactured by Macbeth)
It evaluated by the L value measured by. This L value represents the luminous density of a color, and the smaller the L value, the darker the color.

Example 1 A polyester multifilament yarn having a hot water shrinkage ratio of 19.3% and 70D / 48F composed of split type polyester fibers as shown in FIG. 1 was used. This split type polyester fiber is made by joining polyester ultrafine fibers with a polyester binder. Polyester microfiber (a) and polyester binder (b)
The weight ratio of polyester microfiber (a): polyester binder (b) = 4: 1. Therefore, the single yarn fineness of the split type polyester fiber is about 1.46 denier, the fineness of one polyester ultrafine fiber is about 0.146 denier, and the sharp angle of the wedge-shaped cross section of the polyester ultrafine fiber is Was 36 °. The components of the polyester ultrafine fibers (a) are 90.5 mol% polyethylene terephthalate component and 4.5 mol% 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane.
And 5% by mole of isophthalic acid, which is a copolymer of polyester-based ultrafine fibers (a) and the polyester-based binder (b) is composed of polyethylene glycol having a molecular weight of 6000 (13.3% by weight). And 2.5% by weight of sulfoisophthalic acid were used as a copolyester, and these two types of chips were used to carry out a stretching process after spinning to produce a yarn.

Using this yarn, double-nit circular knitting machine LPJ
The knitting organization chart shown in FIG. 3 was knitted with a H type (manufactured by Fukuhara Seiki Co., Ltd.) with a kettle diameter of 33 inches and 28 gauge. Note that (C1) and (C2) in FIG. 3 indicate cylinder needles having different bat positions, and (D1) and (D2) indicate dial needles having different butt positions.

The knitted fabric thus obtained was dyed using a Circular dyeing machine (manufactured by Hisaka Seisakusho Co., Ltd.) before dyeing, using 20 g of caustic soda / Little and Sunmol FL (Nichika Chemical Industry Co., Ltd.) as a surfactant. (Manufactured by K.K.), soaked in 1 g / liter aqueous solution, bath ratio 1:30, temperature 97 ° C for 2
The splitting was performed by relaxing scouring and alkali weight loss of 20% by weight for 0 minutes. That is, the polyester-based binder (b) of the split type polyester fiber shown in FIG. 1 was dissolved and removed, and as shown in FIG. 2, a splitting process was carried out to form a bundle of polyester ultrafine fibers (a).

A Dyex Black RB-up (manufactured by Mitsubishi Kasei Co.) as a disperse dye was used as a disperse dye at 15% owf using a Circular dyeing machine (manufactured by HISAKA CORPORATION). F
5% owf (manufactured by Mitsubishi Kasei Co., Ltd.) and 0.5 g / day of Sun Salt RZ-8 (manufactured by Nika Kagaku Co., Ltd.) as a leveling agent.
Add 0.2cc of little and acetic acid (48%) / little,
Dyeing was performed at a temperature of 130 ° C. for 40 minutes while also performing shrinkage treatment. Next, 5 g / liter of 1-bath reducing cleaning agent Bisnol P-70 (manufactured by Yatasha Yushi Co., Ltd.) was added, and the temperature was 80 ° C. for 2 hours.
Reduction cleaning was performed for 0 minutes. Finally, a pin tenter (manufactured by Ichikin Kogyo Co., Ltd.) was used to perform a finishing set at 170 ° C. for 20 seconds, and a wipe was obtained by sewing.

Comparative Example 1 A hot water shrinkage rate of polyethylene terephthalate was used in place of the polyester multifilament yarn of 70D / 48F having a hot water shrinkage rate of 19.3% composed of split type polyester fibers in Example 1. Is 5%, 55D / 19
Using the 6F circular cross-section yarn, the relax scouring is
A wiping cloth of Comparative Example 1 was obtained in the same manner as in Example 1 except that caustic soda was not used.

The wiping cloths of Example 1 and Comparative Example 1 were used to evaluate the wiping property and the color development of the cloth. as a result,
The characteristics of the wipes of Example 1 and Comparative Example 1 are shown in Table 1.

[0031]

[Table 1]

As is clear from Table 1, the wiping cloth of Example 1 according to the present invention has a very good wiping performance, and although it is an ultrafine fiber, the knitted fabric is sufficiently shrunk to achieve high density. The fabric was excellent in tension and waist, and there was no problem in operability when wiping it. In addition, it is possible to obtain extremely excellent color developability, and the obtained L value level has no problem in practical use. Conventionally, a deep dyeing treatment agent which is often used in dyeing of ultrafine fibers. Was not necessary and the dyeing fastness was also good.

On the other hand, the wiping cloth of Comparative Example 1 was inferior in wiping performance, the texture of the cloth was soft, and the wiping cloth was in close contact with the lens during wiping and was difficult to wipe. Further, the coloring property was also lacking in the sharpness of hue, and the obtained L value level had a problem in practical use and the dyeing fastness was inferior.

[0034]

EFFECTS OF THE INVENTION The wiping cloth according to the present invention is made of ultrafine fibers alone and has a tenacious and elastic texture with no uneven texture, and the cross section of the ultrafine fibers constituting it has at least one acute angle. Since it is a deformed shape, it has an effect of being able to satisfactorily remove the dirt attached on the spectacle lens or the like.

Therefore, the use of this wipe is to wipe the glasses,
Can be applied to clean room gloves and cleaner cloth.

Further, since the yarn has a high shrinkage, a sufficient hue can be obtained at a normal dye concentration in the dyeing process without using a large amount of dye, so that the cost can be reduced and the cost is low. It also has the effect of being able to produce.

[Brief description of drawings]

FIG. 1 is an example of a cross-sectional view of a splittable fiber used in the present invention.

FIG. 2 is a transverse cross-sectional view showing a split state of the split fiber of FIG.

FIG. 3 is an example of a knitting organization chart used in the present invention.

[Explanation of symbols]

 a Microfiber b Binder C1 Cylinder needle C2 Cylinder needle with different butt position D1 Dial needle D2 Dial needle with different butt position F1 First yarn feeder F2 Second yarn feeder

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location D03D 15/00 F 7199-3B G02C 13/00

Claims (1)

[Claims] 1. A polyester-based microfiber having a cross-section of an irregular shape with at least one acute angle, a fineness of 0.05 to 0.3 denier, and a hot water shrinkage of 10 to 50% It is a split type polyester fiber that is joined by multiple agents, and the fabric is made using a yarn composed of split type polyester fibers in which the alkali solubility of the polyester binder is higher than that of the polyester ultrafine fibers. A method for producing a wiping cloth, which comprises knitting and weaving, and then subjecting the split-type polyester fiber to a split treatment and shrinking the fabric.