JP3093358B2 - Wiping cloth for rental - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rental wiping cloth having an excellent combination of hand, shrink resistance and dust collecting performance.

[0002]

2. Description of the Related Art Conventionally, so-called chemical rags or dry maintenance rags (wiping cloths) have been widely used as materials which can be cleaned without wetting hands. This type of cloth is generally made by impregnating a spun woven fabric with a dust-absorbing oil agent, and after lending it to a customer for a certain period of time, collecting it, washing it, regenerating it, It is operated by a rental system for lending.

[0003] In this cloth, the oil agent is put on a table,
It is important not to give a so-called oily feeling because it is held without being transferred to the wiping surface of furniture and the like and touches the hands of the cleaner. From such a viewpoint, it is important to use a cellulose-based spun yarn such as cotton. Woven fabrics are widely used.

[0004]

Problems to be Solved by the Invention Cotton spun yarn cloth certainly has a large oil-absorbing property and impregnation amount, less recontamination during washing compared to synthetic fiber cloth, etc., and durability during repeated use. Although it is first satisfactory in terms of sex, the following disadvantages are still recognized.

[0005] That is, the cloth itself shrinks considerably with the use under severe conditions and with repetition of washing, oil impregnation, etc.
As a result, the feeling of the cloth tends to be somewhat rough and the oily feeling when touched by hand tends to be remarkable.

Accordingly, an object of the present invention is to eliminate the above-mentioned drawbacks of the conventional wiping cloth for rental, and to excel in oil impregnation, adsorption and retention, and dust adsorption and retention.
Even when used repeatedly, there is little shrinkage, and there is no oily feeling,
The purpose is to provide a wiping cloth for rental that has an excellent texture.

[0007]

According to the present invention, there is provided a wiping cloth for rental, which is obtained by impregnating a woven fabric composed of spun yarns of staple fibers with a dust absorbing oil agent.
At least 1 inch (2.54 cm) of weft of the woven fabric
Non-twisted core of staple fiber having substantially zero twist per one inch and one twist per inch (2.54 cm)
The present invention provides a rental wiping cloth comprising a wrapped spun yarn comprising a wrapping layer of 7.7 or more staple fibers. The staple fibers are preferably made of cellulosic fibers or mixed staple fibers mainly composed of cellulosic fibers.

The core (A) of the wrapping spun yarn and the wrapping layer (B) are present in a weight ratio of 99: 1 to 5050: 50 and as a whole 0.1 to 100, especially 0.2 to 50. It is good to be fast. It is preferable that at least the weft of the woven fabric is composed of a ply yarn in which a plurality of wrapping spun yarns are substantially untwisted and aligned, from the viewpoint of texture and dust adsorbability.

[0009]

According to the present invention, a staple fiber spun woven fabric used for holding and impregnating a dust-adsorbing oil agent has a staple fiber core having substantially zero twist per inch (2.54 cm) and one inch. It is a remarkable feature to use a wrapped spun yarn composed of a wrapping layer of staple fibers having a twist of 17.7 or more per (2.54 cm) as a weft yarn.

According to the present invention, by using a woven fabric in which the wrapping spun yarn is a weft, the shrinkage of the cloth when the use and regeneration are repeated is reduced as compared with the case where a normal spun yarn is used. It can be significantly reduced.

FIG. 1 shows a rental wiping cloth A made of a woven fabric using a wrapping spun yarn according to the present invention, and a rental wiping cloth B made of a conventional ordinary spun yarn woven fabric (details are both shown). (See example below)) and the number of times of repeated use and reproduction (horizontal axis)
FIG. 3 is a plot of the relationship between the lateral shrinkage and the horizontal shrinkage (vertical axis). According to the above results, the use of wrapping spun yarn is
The surprising fact that it is effective in keeping the shrinkage at a significantly lower level becomes apparent.

[0012] In the wrapping yarn used in the present invention, the core exists in the form of a roving-like aggregate of staple single fibers having substantially no twist. In this core, even though there is entanglement between the single fibers that keeps the form and strength of the yarn, it has looseness between the single fibers that does not lead to shrinkage of the single fiber I think that the. By the way, if such a non-twisted yarn is woven as it is, the weft yarn tends to be broken into single fibers under severe use conditions or severe washing conditions. I can not get the nature.

According to the present invention, the staple fiber is wound around the core as a wrapping layer in a twisted state, so that the core is integrated, so that ordinary spinning can be performed under severe use conditions or severe washing conditions. Like the yarn, the weft has no tendency to fray, and the desired durability can be obtained as a wiping cloth for rental.

Moreover, the spun yarn has a structural feature that the fibers are contained in a bulky state inside the weft. For this reason, in the wiping cloth for rental of the present invention, not only the touch is soft and excellent in texture, but also excellent in impregnating property and adsorption holding property of the oil agent, there is no oily feeling when touching the hand, Further, there is obtained an advantage that the adsorbability and retention of dusts are superior to ordinary spun yarn woven fabrics. In addition, these excellent properties
There is also a feature that it is not damaged even when the use and reproduction processes are repeated.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

(Woven Fabric) In FIG. 2 for explaining the structure of the wrapping yarn used in the present invention, this wrapping yarn 1 is composed of a substantially non-twisted core (bundling) 2 and a wrapping layer 3 wound therearound. Consists of The staple fibers forming the core 2 and the wrapping layer 3 are made of short fibers (staples).

The number of twists per unit length (2.54 cm) of the core 2 is substantially zero, and the core 2 is practically untwisted. The number of twists per unit length (2.54 cm) of the wrapping layer 3 is generally 17.7 or more, particularly 20 to 50.

The ratio of the core 2 to the wrapping layer 3 is such that the core occupies most of the wrapping yarn. Generally, the weight ratio of the core (A) to the wrapping layer (B) is as follows: A: B = 95: 5 to 70:30, and particularly preferably in the range of 90:10 to 75:25 from the viewpoint of the characteristics described above.

The staple fibers constituting the wrapping yarn include cellulosic fibers such as cotton, rayon fibers, polynosic fibers (reinforced rayon fibers) or a combination thereof, polyvinyl alcohol fibers, water-absorbing acrylic fibers, and moisture-absorbing nylon fibers. And the like. Of course, cellulosic fibers are preferred in terms of various performances. However, it is acceptable to blend a small amount of synthetic fibers into the wrapping yarn as long as the essence of the cellulosic fibers is not impaired.

In the woven fabric used in the present invention, the above-mentioned wrapping yarn can be used as a weft in the form of a single yarn. In general, however, a plurality of the above-mentioned wrapping yarns are formed in a substantially untwisted union form. Preferably, it is used. The thickness of the wrapping yarn is preferably in the range of 0.2 to 200, and the thickness of the weft is preferably in the range of 0.1 to 100.

As the warp of the woven fabric, only the wrapping yarn described above can be used, or an ordinary spun yarn can be used. Generally, there is no problem in using the ordinary spun yarn to achieve the object of the present invention, and the thickness of the warp yarn is preferably in the range of 4 to 40, especially 6 to 20.

In FIG. 3 showing an example of a woven fabric, this woven fabric 4 is woven in a plain weave with two wrapping spun yarns 1 as two non-twisted wefts 5 and a normal spun yarn as warp yarns 6. Consisting of The weaving structure of the woven fabric may be plain weave or patterned weave, but plain weave is preferred in view of the strength, durability and dust absorption and retention of the woven fabric. The weaving density depends on the thickness of the weft and the warp, but the final weight per unit area of the woven fabric is 50%.
To 250 g / m ² , particularly preferably 100 to 200 g / m ² .

After the obtained woven fabric has been subjected to bleaching, dyeing or other post-treatments, it is subjected to an oil agent adsorption treatment.

(Oil-impregnating treatment) In order to impregnate the woven fabric with the dust-adsorbing oil agent, an aqueous emulsion of the dust-adsorbing oil agent is brought into contact with the woven fabric, and the oil agent in the emulsion is applied to the fibers in the woven fabric. Adsorption methods are generally used. The aqueous emulsion is obtained by emulsifying and dispersing an oil agent for dust adsorption by the action of a surfactant.

As the oil agent, any of mineral oils and / or synthetic lubricating oils conventionally used for this kind of oil-impregnation treatment is used. As the mineral oil, any of paraffinic, naphthenic, aromatic hydrocarbon and mixtures thereof can be used. Specifically, liquid paraffin, spindle oil, machine oil, refrigerator oil, other petroleum oils Lubricating oil or the like is used. As the synthetic lubricating oil, polyolefin oil (α-olefin oil), polybutene oil, alkylbenzene oil, and other synthetic lubricating oils can be used. These oil agents may be used alone or in combination of two or more.

Any surfactant such as a nonionic surfactant, an anionic surfactant, a cationic surfactant, or an amphoteric surfactant is not particularly limited as long as emulsion-type performance can be obtained. Can be used without. Of course, a combination of two or more surfactants is also possible.
Suitable examples of surfactants include, but are not limited to:

(I) Nonionic surfactant polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyethylene glycol fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene fatty amine ether, polyoxyethylene fatty amide ether, Polyhydric alcohol fatty acid ester, polyoxyethylene polyhydric alcohol fatty acid ester, alkylolamide, Pluronics type activator.

(Ii) Anionic surfactant Sodium dialkyl sulfosuccinate, alkyl sulfonate, fatty acid-amino acid condensate, funnel oil, higher alcohol sulfate, alkylbenzene sulfonate, alkyl sulfate, alkylolamide sulfate Esters, alkyl naphthalene sulfonates, fatty acid ester sulfonates, and fatty acid salts.

(Iii) Cationic surfactant Long-chain alkylpyridinium halide, alkoxymethylpyridinium halide, alkyltrimethylammonium, alkyldimethylbenzylammonium, alkyldimethylbenzylammonium halide, imidazoline cationic surfactant.

(Iv) Amphoteric surfactant Betaine type surfactant, imidazoline type amphoteric surfactant,
Sulphonic acid amphoteric surfactant.

The surfactant is preferably used in an amount of 0.2 to 10% by weight, particularly 1 to 3% by weight, based on the oil agent.

As the surfactant, it is particularly desirable to use a combination of an oil-soluble anionic surfactant and a nonionic surfactant from the viewpoint of preventing recontamination. As the oil-soluble anionic surfactant, any oil-soluble one having an anionic active group such as a carboxylate or a sulfonate is used. The most preferable example is sodium dialkylsulfosuccinate such as sodium di-2-ethylhexylsulfosuccinate, and alkaline earth metal salts of higher fatty acids such as calcium stearate and magnesium stearate can also be used.

As the nonionic surfactant, HLB is 5
Of nonionic surfactants, for example, polyoxyethylene alkyl phenyl ethers, especially ethylene oxide, in the range of 2 to 13 and especially in the range of 6 to 11.
To 6, polyoxyethylene alkyl ethers,
In particular, ethylene oxide having 2 to 6 moles of addition is advantageously used.

The oil-soluble anionic surfactant is preferably used in an amount of 0.1 to 3% by weight, especially 0.3 to 1% by weight per oil, and the nonionic surfactant is used in an amount of 0.1 to 3% by weight per oil. It is preferably used in an amount of 5% by weight, especially 0.5 to 2% by weight.

In the oil agent composition used in the present invention, of course, any compounding agent known per se can be compounded according to a formulation known per se. For example, in this oil composition,
One or more of an antimicrobial agent, a fungicide, a coloring agent, a fragrance, a metal sequestering agent, a flame retardant, a flame retardant, various stabilizers, and the like can be blended.

In the oil-impregnating treatment of the fiber, the above-mentioned oil composition is converted into an oil-in-water emulsion. The concentration of the oil agent composition in water is generally 0.01 to 10% by weight, particularly 0.5% by weight.
The size of the emulsion particles is generally in the range of 0.1 to 50 μm.

The treatment of the fiber with the emulsion of the oil agent composition can be carried out in a batch system or a continuous system. This treatment is most easily carried out by immersing the fibers in the above-mentioned emulsion, but can also be carried out by spraying the fiber with the emulsion.
When the fibers are continuously treated with the oil emulsion, the oil emulsion and the fibers may be brought into contact with each other in a countercurrent or cocurrent manner.

The conditions under which the oil emulsion and the fibers are brought into contact with each other are not particularly limited and can be varied over a wide range. However, a pH range of 3 to 10 is generally desirable for uniform and efficient adsorption treatment. Room temperature is sufficient, but it can be heated to a temperature of about 50 to 60 ° C. The contact time is such that the adsorption of the oil agent is completed and the liquid becomes transparent, and about 10 seconds to 10 minutes is sufficient.

The amount of the oil agent composition adsorbed on the fibers is generally in the range of 5 to 40% by weight, preferably 10 to 30% by weight.

The fibers which have been impregnated with the oil agent are then subjected to a dehydration treatment, and dehydrated until the absorbed water contained in the fibers becomes 70% by weight or less, particularly 60% by weight or less. At the time of this dehydration treatment, according to the present invention, it is a remarkable feature that the adsorbed oil agent is not substantially desorbed by re-emulsification even though the dehydration is performed to a high degree. The dehydration process is
It can be easily carried out using a dehydrator known per se, for example, a centrifugal dehydrator, a pressure dehydrator such as a pressure roll, a vacuum dehydrator, or the like. The dehydrated oil-impregnated fiber is then dried at a temperature of 60 to 80 ° C to obtain a final product.

[0040]

The present invention will be described in more detail with reference to the following examples.
The tests in the examples were performed as follows.

(I) Dust test A sample (weight WF) is placed in a bottle, and fine silica sand powder twice as heavy as the sample and five rubber balls are charged, followed by stirring for 1 minute. Next, the sample is taken out on a wire net and left for 10 minutes. Shake upside down 100 times with a dust tester and weigh (weight WD). The dust ratio (D) was calculated from the following formula as an average value of three samples.

(Equation 1)

(Ii) Washing test The test was allowed to stand all day and night, and excess dust was adsorbed by dusting and pressing, and this sample was washed with a household washing machine at 50 ° C. and a detergent concentration of 5%. After washing for 15 minutes and drying, the reflectance of the sample was measured to determine the washing efficiency. Here, the cleaning efficiency is represented by the following equation.

(Equation 2) RS: Y value before washing RW: Y value after washing R0: Y value of white cloth

(Iii) Contamination test The sample was contaminated for 30 minutes using a tergot meter (100 rpm) under the conditions of 60 ° C. and 10 g / l of dust, the reflectance was measured, and the contamination rate was determined by the following equation. .

(Equation 3) RS: Y value before contamination RW: Y value after contamination.

(Iv) Hand feeling test a) Bulkness One new wiping cloth sample for rental is folded into three, a thick glass plate (3 mm) is placed thereon for 24 hours, and then the glass plate is removed. The sample was left for 1 hour, its thickness was measured, and the average value (mm) of n = 5 samples was taken as the value of bulkiness.

B) Sensory test Using three panelists of a housewife, two types of new wiping cloth samples for rental A and B were actually touched and evaluated by the method of giving one point to the person with the better texture. Was done.

(V) Shrinkage test For each sample, the washing test of (ii) and the oil-impregnating treatment described in Examples described below were performed as one cycle, and the dimensions of the cloth in the weft direction at each cycle were measured. The shrinkage (SL) was calculated by the following equation.

(Equation 4) LI: Length in the weft direction of the sample before regeneration LC: Length in the weft direction after washing and regeneration.

Examples 1 and 2 A wrapping mixed yarn of 80% cotton and 20% rayon was used as the weft. This wrapping yarn has a substantially non-twisted core in a ratio of 80% and a wrapping layer in a ratio of 20%, the wrapping layer has a twist of 27.8 turns / inch (Z), and has an overall thickness. 6.5th.

The single yarn is composed of a 40-count cotton spun yarn.
The plying yarn is a warp yarn, the wrapping yarn obtained by untwisting the two wrapping yarns without twist is a weft yarn, 29 warps / inch and a weft of 3
Weaving was performed at a weave density of 4 yarns / inch to produce a plain woven fabric. This woven fabric was bleached with sodium hypochlorite to obtain a raw cloth for wiping cloth.

An oil composition having the following formulation (hereinafter referred to as "oil A") was prepared. Mineral oil 99.8 to 94.0% Sodium di-2-ethylhexyl sulfosuccinate 0.1 to 2% Polyoxyethylene nonylphenol ether (number of moles of added EO 4) HLB = 8.9 0.1 to 4%

Using the above-described raw material, an oil treatment was performed under the following conditions. Oil agent composition Oil agent A Oil amount 10% by weight and 20% by weight per fiber Bath ratio 1:10 Temperature 30 ° C Salting-out agent CaCl2 addition amount 300ppm pH 7 Treatment time 10 minutes (Salt-out agent is charged after 5 minutes) After adsorption treatment Was dehydrated until the water content became 50%, and then dried at 70 ° C. to obtain a wiping cloth product.

This product was subjected to the tests (i) to (iv) described above, and the results are shown in Table 1. The results of the shrinkage test (Example) are shown in FIG.

Comparative Examples 1 and 2 For comparison, 80% cotton and rayon 2 were used as wefts.
0%, and the single yarn is a 40th spun yarn (9 twists /
Inches, Z twists) are used, two twisted yarns of the 8th count are used, and as the warp yarn, a 10th twisted yarn of the 40th cotton spun yarn is used, and the warp is 29 yarns / inch and the weft 33.
The woven fabric was woven into a plain woven fabric at a woven density of books / inch, and bleached in the same manner as in Example 1 to obtain an original fabric.

The raw fabric was subjected to an oil impregnation treatment in the same manner as in the example, to produce a wiping cloth. The obtained results are shown in Table 1 and FIG.

[Table 1] * Hand evaluation was shown by comparing Example 1 with Comparative Example 1 and by comparing Example 2 with Comparative Example 2.

[0054]

According to the present invention, one inch (2.54 c
a) a wrapping spun yarn comprising a non-twisted core of staple fibers having substantially zero twist per m) and a wrapping layer of staple fibers having a twist of 17.7 or more per inch (2.54 cm); By impregnating the woven cloth with a dust-absorbing oil agent to form a wiping cloth for rental, the various drawbacks of the conventional wiping cloth for rental are eliminated, and the impregnating property of oil agent, adsorption retention, and dust adsorption retention are improved. It is possible to provide a wiping cloth for rental which is excellent, has little shrinkage even when repeatedly used, has no oily feeling, and has an excellent texture.

[Brief description of the drawings]

FIG. 1 is a rental wiping cloth A made of a woven fabric using a wrapping spun yarn according to the present invention, and a wiping cloth B for rental made of a conventional ordinary spun yarn woven fabric.
7 is a graph in which the relationship between the number of times of use and reproduction (horizontal axis) and the lateral shrinkage rate (vertical axis) is plotted.

FIG. 2 is an enlarged side view illustrating the structure of a wrapping spun yarn used in the present invention.

FIG. 3 is an enlarged top view showing an enlarged structure of an example of a woven fabric used in the present invention.

[Explanation of symbols]

 1 wrapping spun yarn 2 core 3 wrapping layer. 4 Woven cloth 5 Weft 6 Warp.

Continuation of the front page (51) Int.Cl. ⁷ identification code FI D03D 15/00 D03D 15/00 E // D06M 13/02 D06M 13/02 (58) Field surveyed (Int.Cl. ⁷ , DB name) A47L 13/17 A47L 13/16 D02G 3/38

Claims (4)

(57) [Claims] 1. A rental wiping cloth made by impregnating a woven fabric composed of spun yarns of staple fibers with a dust-absorbing oil agent, wherein at least the weft of the woven fabric has a substantial number of twists per inch (2.54 cm). Zero top staple fiber untwisted core and 1 inch (2.54 cm)
A rental wiping cloth comprising a wrapping spun yarn comprising a staple fiber wrapping layer having a twist of 17.7 or more. 2. The wiping cloth according to claim 1, wherein at least the weft of the woven fabric is a ply yarn obtained by aligning a plurality of the wrapping spun yarns substantially without twist. 3. The core of the wrapping spun yarn (A) and the wrapping layer (B) are present in a weight ratio of 99: 1 to 50:50, and have a thickness of 0.1 to 100 as a whole. The wiping cloth according to claim 1. 4. The wiping cloth according to claim 1, wherein the staple fibers are cellulosic fibers or mixed staple fibers mainly composed of cellulosic fibers.