JP3183706B2 - Cleaning supplies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to cleaning articles. In detail, the present invention is excellent in cleaning properties such as dirt wiping property and dust collecting property, and also has good hair loss resistance and washing resistance, and has excellent color development and good color tone and gloss with depth. The present invention relates to cleaning articles such as napping cloth, mop, and hataki.

[0002]

2. Description of the Related Art Conventionally, water-retaining fibers such as cotton, rayon, and polyvinyl alcohol fibers have been widely used for cleaning articles such as nappied cloth, mop, and the like. Many cleaning products have been proposed. Examples of such prior art include a flat cross section having a polygon having a surface area of 5000 cm ² or more per gram and having a flattening rate of 2.5 or more, wherein 25% by weight or more of fibers forming a surface in contact with an object to be cleaned are formed. Manufacture of cleaning articles from artificial fibers (Japanese Patent Publication No. Sho 59-30419,
No. 246725), a multifilament crimped yarn of a synthetic fiber such as nylon or polyester is twisted together with a heat-adhesive filament yarn, and this is heat-sealed to form a mop yarn (JP-A-63-9418). ), A pile yarn formed by twisting and fixing a large number of spun yarns containing fibers having irregular cross-sections and heat-shrinkable and heat-settable filament yarns or spun yarns to form a pile yarn and form a mop from the pile yarn (Japanese Patent Application Laid-Open No. 63-63). No. 92320, JP-A-63-281613, JP-A-63-28614, etc.).

However, cleaning articles formed by using water-retaining fibers, such as cotton, rayon, and polyvinyl alcohol fibers, as napping fibers and mop yarns are inferior in colorability, color fastness, and the like. It is easy to occur and bulky ones have not been obtained. Further, in the above-mentioned cleaning articles using synthetic fibers, especially nylon or polyester fibers, in order to improve the cleaning performance, for example, wax, paraffin oil, other oily substances, a cleaning agent comprising a surfactant or the like. The use of the above oil agent has the disadvantages that the fibers are sticky and the usability is deteriorated, and that the object to be cleaned is secondarily contaminated.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional cleaning articles, to have excellent cleaning properties such as dirt wiping properties and dust collecting properties, and to have good washing resistance. An object of the present invention is to provide a cleaning article which has no hair loss, is excellent in coloring properties, can maintain a deep and good color tone and gloss for a long period of time, and is bulky and has good handleability and feel.

[0005]

Means for Solving the Problems The present inventors have studied to solve the above problems. As a result, as a nap fiber, a nap yarn or a mop yarn in a cleaning article, a fiber mainly composed of a composite fiber of a saponified ethylene-vinyl acetate copolymer and a polyamide having an ethylene copolymerization ratio of 25 to 70 mol% is used. The present inventors have found that the above-mentioned problems can be solved when used, and completed the present invention.

That is, the present invention relates to a nap fiber, a nap yarn or a mop yarn mainly composed of a composite fiber of a saponified ethylene-vinyl acetate copolymer and a polyamide having an ethylene copolymerization ratio of 25 to 70 mol%. It is a cleaning article characterized by having.

In the present invention, the above-mentioned "nap fiber, nap yarn or mop mainly comprising a composite fiber of a saponified ethylene-vinyl acetate copolymer having an ethylene copolymerization ratio of 25 to 70 mol% and a polyamide. "Yarn"
50% by weight or more, preferably 60 to 100% by weight of the fibers constituting the nap fiber, the nap yarn or the mop yarn in the cleaning article.
It means that the weight percent is composed of a composite fiber of a saponified ethylene-vinyl acetate copolymer having a copolymerization ratio of ethylene of 25 to 70 mol% and a polyamide.

[0008] The term "saponified ethylene-vinyl acetate copolymer" refers to a composite fiber of a saponified ethylene-vinyl acetate copolymer and polyamide (hereinafter referred to as "saponified Et.V.
Ac / PA composite fiber ").
Saponified vinyl acetate copolymer (hereinafter "Saponified Et.V"
"Ac-based copolymer") is a copolymer in which a vinyl acetate unit is hydrolyzed by saponification into a vinyl alcohol unit in an ethylene / vinyl acetate-based copolymer.

In the present invention, the proportion of ethylene units in the saponified Et.VAc copolymer must be 25 to 70 mol%, and the proportion of ethylene units is particularly preferably 30 to 7 mol%.
It is preferably 0 mol%. If the proportion of the ethylene unit in the copolymer is less than 25 mol%, the spinnability at the time of fiberization becomes poor, and the single yarn breaks during spinning or stretching,
The number of thread breaks increases and the flexibility is lacking. In addition, a saponified Et.VAc copolymer is usually used in combination with a polyamide.
When producing a conjugate fiber by melt-spinning at a temperature of 50 ° C. or more, the heat resistance of the saponified Et.VAc-based copolymer becomes inferior, and the spinning is not likely to be performed smoothly. On the other hand, when the proportion of ethylene units exceeds 70%, the proportion of saponified vinyl acetate units (that is, vinyl alcohol units) necessarily decreases, and the proportion of the saponified vinyl acetate units or napping yarns or mop yarns is reduced. Cleaning properties such as dirt wiping property and dust collecting property of the cleaning article to be used are reduced, and further, coloring property and bulkiness are reduced, so that usability is deteriorated and appearance is deteriorated.

Further, in the saponified Et.VAc copolymer,
It is preferred that 95 mol% or more of the vinyl acetate units are saponified. If the degree of saponification of the vinyl acetate unit is lower than 95 mol%, the crystallinity of the saponified Et.VAc-based copolymer is reduced, the fiber properties such as strength are reduced, and the copolymer is easily softened. Therefore, troubles in the processing step tend to occur, and the feeling of the cleaning articles obtained tends to be inferior.

As the saponified Et.VAc-based copolymer, those having a number average molecular weight of 250 or more are preferably used. Here, the number average molecular weight referred to in the present invention means each of an ethylene unit, a saponified vinyl acetate unit (vinyl alcohol unit), and an unsaponified vinyl acetate unit which constitute a saponified Et.VAc-based copolymer. Is the average of the polymer of the total number of these units (several degrees of polymerization) in the copolymer, when is defined as one repeating unit.

If the number average molecular weight of the saponified Et.VAc copolymer is less than 250, the cleaning articles obtained will have good wiping properties, but the strength of the composite fibers will be low and the cleaning properties will be low. When the article is repeatedly used or washed, hair loss or the like is liable to occur, the cleaning properties are reduced, and the appearance is also likely to be poor. The upper limit of the number average molecular weight of the saponified Et.VAc-based copolymer is not particularly limited. However, if the degree of polymerization is too high, the melt fluidity of the polymer during melt spinning deteriorates and the processability during fiberization deteriorates. Usually, it is preferable to use those having a number average molecular weight of 500 or less. Comprehensively, the number average molecular weight is 300 to 400
It is particularly preferable to use a saponified Et.VAc copolymer.

Such a saponified Et.VAc copolymer is obtained by radically polymerizing ethylene and vinyl acetate in a polymerization solvent such as methanol in the presence of a radical polymerization catalyst, and then displacing unreacted monomers. Then, saponification treatment with caustic soda or the like is performed to obtain a saponified Et.VAc-based copolymer, which is pelletized in water and dried. Also, a commercially available saponified Et satisfying the above requirements
· Purchase the VAc copolymer, may be used as it is, for example, it is available as EVAL ^R etc. Co. Kuraray.

In any case, when a metal ion such as an alkali metal ion such as sodium ion or potassium ion or an alkaline earth metal ion such as calcium or magnesium is present in the saponified Et.VAc copolymer,
Excessive cross-linking, main chain scission, side-chain elimination, etc. occur in the t-VAc-based copolymer, and the gelation of the copolymer is liable to occur, and the thermal stability becomes poor, and Heat resistance during composite spinning is likely to decrease. Therefore, saponified Et.VAc
In order to continuously and stably spin the / PA composite fiber for a long time, it is desirable that the content of those metal ions in the saponified Et.VAc-based copolymer be kept at a predetermined level or less, The content of each metal ion in the Et.VAc-based copolymer is preferably set to 100 ppm or less.

In order to improve the softening point, heat resistance, hot water resistance and the like of the saponified Et / VAc copolymer, the saponified Et / VAc copolymer in the conjugate fiber is optionally crosslinked. May be. As the cross-linking method, any method known as a cross-linking method for a vinyl alcohol unit-containing copolymer can be employed, for example, divinyl compounds, monoaldehydes represented by formaldehyde, aldehyde compounds such as dialdehydes, diisocyanates and the like. Cross-linking with an organic cross-linking agent such as polyisocyanate, cross-linking with an inorganic cross-linking agent such as a boron compound, cross-linking with radiation or light such as γ-ray or electron beam, and the like can be given. For example, when performing a cross-linking treatment with dialdehyde, it is preferable to use a strong acid such as sulfuric acid or hydrochloric acid. If unreacted aldehyde remains after the cross-linking treatment, the dyed product may be discolored or the like. Therefore, it is preferable to oxidize with an oxidizing agent to form a carboxylic acid or a salt thereof. Such a cross-linking treatment is performed by saponifying Et.VAc /
It is desirable from the viewpoint of processability, workability, etc., to carry out the process after producing a napped fabric or a mop yarn for cleaning articles from fibers mainly comprising PA composite fibers.

The polyamide as the other component in the conjugate fiber used in the present invention is a saponified Et.V.
It has good bondability with Ac-based copolymers, and even when it is composite-spun with various types of composites, the saponified Et-VAc-based copolymer and polyamide can be bonded together. No interfacial peeling or the like occurs, and the processability of fiberization is good. Moreover, even after the cleaning article is made, troubles such as peeling at the joint surface between the saponified Et.VAc-based copolymer and the polyamide do not occur. In addition, like the saponified Et.VAc copolymer, the polyamide also has relatively good resistance to recontamination during washing, and has little problem of recontamination during washing as in polyesters. It is possible to provide a cleaning article having excellent recontamination resistance at the time.

Further, polyamide has a relatively high refractive index,
The colored fiber of polyamide alone tends to have a whitish gloss, but by forming a composite fiber with a saponified Et.VAc-based copolymer having a small refractive index, the coloring property is improved, and a deep and good gloss is obtained. Can be color tones. In that case, the saponification Et.V
When a copolymer having a refractive index of 1.55 or less is used as an Ac-based copolymer and is compounded with polyamide, the resulting saponified E
The color tone and gloss of the t.VAc / PA composite fiber are further improved.

As the polyamide, it is desirable to use nylon 6, nylon 66, nylon 12, or a mixture of two or three of them from the viewpoint of the fiberization process. If necessary, a small amount of a polyamide in which another third component is copolymerized may be used together with these polyamides.

The composite ratio of the saponified Et.VAc-based copolymer and the polyamide in the composite fiber is represented by the weight of the saponified Et.
・ VAc copolymer: polyamide = 20: 80 to 80: 2
It is preferably 0, particularly preferably 30:70 to 70:30. Saponified Et.VAc in composite fiber
When the proportion of the system copolymer is less than 20% by weight, the processability during fiberization becomes poor, and the proportion of alcoholic hydroxyl groups in the conjugate fiber decreases, which makes it possible to remove dirt from cleaning articles. , The cleaning properties of the resulting cleaning articles are likely to be reduced, and the resulting cleaning articles are liable to be reduced in re-contamination resistance during washing, and to have poor gloss and color tone. On the other hand, when the ratio of the saponified Et.VAc-based copolymer exceeds 80% by weight, the processability such as spinning, drawing, and entanglement tends to be poor, and the fiber properties such as fiber strength are deteriorated. Hair loss easily occurs at the time of washing or washing.

The composite form of the saponified Et.VAc / PA composite fiber can be any form such as a core-sheath type, a sea-island type, a bonded type, and a mixed type thereof. 2 for core-sheath type
Any of a layer-core type and a multilayer-core type of three or more layers may be used. In the case of the sea-island type, the shape, number, and dispersion state of the islands can be arbitrarily selected, and some of the islands may be exposed on the fiber surface. Furthermore, in the case of a bonding type, in a fiber cross section perpendicular to the length direction of the fiber, the bonding surface may be any of a straight line, an arc, or any other random curved shape, and a plurality of bonding portions. May be parallel to each other, radial, or have any other shape.

As described above, saponified Et.VAc / PA
In the composite fiber, the saponified Et.VAc-based copolymer and the polyamide are preferably compounded in a weight ratio of 20:80 to 80:20, but the saponified Et.VAc-based copolymer is a composite fiber. Occupies 60% or more of the cross-sectional area of the cleaning article, thereby improving the cleaning properties such as dirt wiping property and dust collecting property, and providing a clean and good gloss and coloring state of the cleaning article. Obtainable. In particular, when a polyamide having a high refractive index is formed into a composite form in which the polyamide is covered with a saponified Et.VAc-based copolymer having a low refractive index, a product having good luster and color tone which is not whitish and has a wet depth is obtained. Can be preferred.

The cross-sectional shape of the saponified Et.VAc / PA composite fiber may be any shape, and may be circular or irregular. In the case of an irregular cross section, for example, a flat shape, a rectangular shape such as a triangle to an octagon, a T shape, a multi-leaf shape,
Any shape such as an ellipse can be used. Although not limited, saponified Et.VAc / P used in the present invention
Specific examples of the A composite fiber include those having a composite form and a cross section shown in FIGS. 1 to 8. 1 to 8, A indicates a saponified Et.VAc-based copolymer, and B indicates a polyamide. Further, the above-mentioned conjugate fiber may contain optional additives such as a fluorescent brightener, a stabilizer, a flame retardant, and a coloring agent, which are usually used in the fiber-forming polymer, as needed.

The above-described saponified Et.VAc / PA conjugate fiber is produced by melt-spinning using a saponified Et.VAc-based copolymer and a polyamide, and subjecting it to a stretching treatment, a heat treatment, and the like as necessary. be able to. Conditions such as spinning temperature, take-up speed, drawing temperature, magnification, heat treatment temperature, etc.
It is preferable to select as appropriate according to the component composition and saponification degree of the saponified Et.VAc-based copolymer used, the type of polyamide, the composite ratio of both polymers, the composite form, and the like. As the melt spinning method at that time, any of the conventional melt composite spinning techniques for producing composite fibers from two kinds of thermoplastic polymers can be used.
For example, each of the saponified Et.VAc-based copolymer and the polyamide is melted by a separate extruder to form a respective molten polymer stream, and the molten polymer streams are introduced into a spinning apparatus having a composite spinning pack. A composite fiber can be produced by combining and spinning in a spinning pack. Although not limited, the melting temperature of each polymer at that time is usually 285 ° C. or lower, and the spinning temperature is 250 to 285 ° C.

Then, the saponified Et.VAc / P obtained above
In producing a cleaning article having a nap fiber, a nap thread or a mop thread mainly composed of the conjugate fiber using the conjugate fiber, any of the methods and apparatuses conventionally employed in this type of cleaning article is used. Can be used. For example, the saponified Et.VAc /
Even if a direct napping fabric is produced by using the filament or multifilament yarn of the PA composite fiber as it is as the fiber or yarn for direct napping, or the multifilament yarn is twisted, air-processed, and mixed to a predetermined thickness. Napping fabric and mop using this yarn as a napping yarn (pile yarn) or a mop yarn, or interlacing, stuffing, or the like using the above multifilament using hot air. BCF (Bulked Continuous Fi
After performing bulk processing by applying a crimp by the lament method), a plurality of the bulk processed yarns are combined, ply twisting, air processing, blending, etc. are performed to make a napped yarn or a mop yarn, and this is used. A cleaning article such as a nap cloth or a mop may be manufactured.

In the case where a yarn for napping or a mop yarn is produced from a multifilament yarn composed of a saponified Et.VAc / PA composite fiber as described above, even if the same multifilament yarns are combined, the saponified Et.VAc / PA yarn is used. A multifilament yarn of a conjugate fiber and a multifilament yarn of another fiber may be combined. When a multifilament yarn of a saponified Et.VAc / PA composite fiber and a multifilament yarn of another fiber are combined, the multifilament yarn of the other fiber may be an aromatic polyamide fiber, an aliphatic polyamide fiber, a polyester fiber, or the like. Multifilament yarns can be used. In that case,
It is necessary that the ratio of the other multifilament yarn is less than 50% by weight of the fiber constituting the napped yarn or the mop yarn, and it is particularly preferable that the ratio be 40% by weight or less.

The saponified Et.VAc / PA composite fiber is not limited to a multifilament yarn, but is cut by 30%.
A short fiber of about 100 mm, which is spun alone or mixed with a natural fiber such as cotton or hemp or other synthetic fibers to form a spun yarn, and the spun yarn is used as a napping yarn or a mop yarn for cleaning. Articles may be made. Among them, cleaning articles are prepared by using multifilament yarn mainly composed of saponified Et.VAc / PA composite fiber as a napping yarn or a mop yarn in terms of hair loss resistance, bulkiness, shape stability and the like. Desirable.

The cleaning article of the present invention may be in any form and is not particularly limited as long as it has nap fibers, nap yarns or mop yarns mainly composed of saponified Et.VAc / PA composite fibers. For example, saponified Et VAc
Weaving a pile fabric using the above-mentioned napping fibers and yarns mainly composed of / PA conjugate fiber, and saponifying Et.VAc
/ PA composite fiber (pile fabric) having nap fibers or nap yarns, and using it as a cleaning article, or using a saponified Et.VAc / P
The napping fibers or yarns mainly composed of the A-composite fibers may be implanted into a loop pile or cut pile-like pile product, which may be used as a cleaning product.

Alternatively, an ordinary knitted fabric is produced by knitting and weaving using the above-mentioned napping fibers and yarns mainly composed of saponified Et.VAc / PA composite fiber, and this is raised by buffing or other means. Then, a fabric having raised hair (raised) made of saponified Et.VAc / PA composite fiber may be produced, and this may be used as a cleaning article. Furthermore, saponified Et.
The above-mentioned napping fibers and yarns mainly composed of VAc / PA composite fibers are cut to form short fibers of about 30 to 100 mm, and the short fibers are fixed with, for example, an entangled nonwoven fabric, a binder resin or a binder fiber to form a nonwoven fabric. Are formed, and the nonwoven fabric is brushed by an appropriate means to obtain a saponified Et.V.
A fabric having nap (raised) made of the Ac / PA composite fiber may be made and used as a cleaning article.

In preparing the above-described cleaning article having naps and naps mainly composed of saponified Et.VAc / PA composite fibers, the thickness of the naps and naps is usually about 2 to 2. It is good to keep about 20 denier. These cloths having raised or raised hair may be cut, for example, to a predetermined size and used as a cleaning product as a cloth, or used as a mitten-shaped bag-shaped cleaning product, or any other May be used.

In the case of a mop yarn, a multifilament yarn or a spun yarn which has been subjected to crimping or other treatment which is mainly composed of the above-mentioned saponified Et.VAc / PA composite fiber or not has been twisted. And usually the total denier is about 2
A mop yarn of about 5,000 to 5,000 denier is manufactured.
Then, a mop tuft is made from such a mop yarn, or the mop yarns are arranged in a meandering shape and fixed to form a mop frenzied yarn, and the tufted material or the frenzied yarn is made of cloth or the like. The mop can be manufactured by fixing the mop to a base material by sewing or other means. Alternatively, a mop may be produced by tufting a mop yarn directly onto a substrate. In addition, it is also possible to produce a flycatcher by fixing the mop tuft to the tip of the rod. In the present invention, as long as the mop yarn mainly composed of the saponified Et.VAc / PA composite fiber is used, the form of the mop or the hataki and the method of producing the same are not particularly limited, and any conventional form and method may be used. .

The coloration of the nap fiber, the nap thread or the mop yarn is carried out during the production of the saponified Et.VAc / PA conjugate fiber, at a stage after the production of the conjugate fiber and before the production of the yarn, the conjugate fiber to the yarn. Or at any stage after the cleaning article has been manufactured. In the case of directly producing a conjugate fiber colored by conjugate spinning, the saponified Et.
After mixing with one or both of the system copolymer and the polyamide, melt composite spinning may be performed. As the coloring agent, depending on the color tone to be made to appear on the pile yarn, for example, an inorganic pigment represented by titanium oxide, carbon black, ultramarine, navy blue, etc., phthalocyanine, other organic pigments, and the like may be appropriately used. It is preferable to use a coloring agent having good light resistance.

The cleaning article of the present invention obtained as described above,
If necessary, dyeing may be performed by an appropriate dyeing method such as a dip dyeing method or a printing method. Further, the treatment may be carried out using an optional agent such as a treating agent for enhancing the dust removing effect of the cleaning article, a wetting agent, an antistatic agent, a flame retardant, a fungicide, a bactericidal / insecticide, and a light stabilizer.

Among the cleaning articles of the present invention, napping cloth (raised cloth) and hataki are, for example, window glasses of houses and other buildings, kitchen utensils, furniture furniture, furniture such as shoji, desks and bookcases. Such as various office equipment, televisions and other various electric appliances, car bodies and window glasses of automobiles and the like, hand goods such as glasses, mirrors, sills, floors, walls, bags made from natural leather and artificial leather, It can be suitably used for wiping and cleaning a wide range of things such as handbags, shoes, clothes, and the like, and the mop can be effectively used for cleaning various floors and knocks.

Hereinafter, the present invention will be described specifically with reference to Examples and the like, but the present invention is not limited thereto. In the following examples, the dirt wiping property and the hair loss resistance of the cleaning article were evaluated as follows.

[0035]

【Example】

[Evaluation of dirt wiping property] The following artificial oily dirt component is prepared, and the dirt component is applied to a wooden floor to form an oily dirt layer. The dirt on the floor is cleaned with a cleaning product (mop or brushed cloth). , And the dirt wiping state at that time was relatively evaluated according to the following three-level evaluation criteria.

An artificial oily soil component : stearic acid 12.5% oleic acid 12.5% coconut hardened oil 12.5% olive oil 12.5% cetyl alcohol 8.5% solid paraffin (melting point 60-61 ° C.) 21.5 % Cholesterol 5.0% Carbon black (manufactured by Tamagawa Carbon Co .; #LBC) 15.0%

Evaluation criteria of dirt wiping property : ○: dirt was almost completely wiped off Δ: half of dirt remained ×: dirt was hardly wiped off

[Evaluation of Hair Loss Resistance] The wooden floor surface soiled with the above-described artificial oily stain component is wiped off with a cleaning article (mops or brushed cloth), and washed once with water. Was repeated 50 times, and the state of hair loss of the cleaning article was visually evaluated and visually evaluated by an optical microscope according to the following three-level evaluation criteria, and relatively evaluated.

Evaluation criteria for anti-hair loss ; ○ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

Example 1 Using methanol as a polymerization solvent and azobis-4-methyloxy-2,4-dimethylvaleronitrile as a polymerization initiator,
Radical polymerization of ethylene and vinyl acetate under pressure and a pressure of ethylene / ethylene having a ratio shown in Table 1 below.
Vinyl acetate random copolymer (number average degree of polymerization about 350)
Was manufactured. Next, this ethylene / vinyl acetate random copolymer is saponified in a methanol solution containing caustic soda, and the saponification degree of the vinyl acetate unit in the copolymer is as shown in Table 1 in a wet state. An Et.VAc-based copolymer was produced. The saponified Et.VAc-based copolymer was repeatedly washed with a large excess of pure water to which a small amount of acetic acid was added, and further washed with a large excess of pure water to obtain an alkali in the copolymer. The content of each of metal ions and alkaline earth metal ions is reduced to about 10 ppm or less, and then water is separated from the copolymer by a dehydrator, and then sufficiently dried by vacuum drying at a temperature of 100 ° C. or less to obtain a saponified Et.・ V
An Ac copolymer was obtained.

A nylon 6 chip (1013BK, manufactured by Ube Industries, Ltd.) containing 20% by weight of ultramarine blue pigment (blue inorganic pigment) and the same nylon 6 chip containing no pigment were mixed at 1:19.
To prepare a nylon 6 chip having an ultramarine blue content of 1% by weight as a whole.

The nylon 6 chip and the saponified Et.VAc copolymer obtained above were melt-extruded at 250 ° C. by separate extruders, and supplied to a spinning pack of a composite spinning apparatus. By spinning from a spinneret, a composite fiber having a composite weight ratio, a composite form and a cross-sectional shape shown in Table 1 is spun out, and a non-aqueous spinning oil agent is adhered to 1500 m.
/ Min. The obtained spun yarn is drawn 2.0 times with a normal roller plate type drawing machine and then combined to form a multifilament of 1500 denier / 1000 filaments. The multifilament is crimped by a hot air fluid treatment method. It was processed into crimped yarn. This crimped yarn is twisted in the S direction at a rate of 150 turns / m, and 1500
A denier ply-twisted yarn was obtained. Next, four of the lower twisted yarns were twisted to produce a mop yarn.

A mop tuft having a hair length of about 20 cm is formed from the mop yarn obtained above, and a large number of the tufts are attached to a base made of cotton woven fabric by sewing, thereby forming a mop. Was prepared. The obtained mop was evaluated for dirt wiping properties and hair loss resistance by the above-described methods. The results are shown in Table 1 below.

[0044]

[Table 1]

From the results shown in Table 1 above, in the case of a mop using a mop yarn composed of a composite fiber of a saponified Et.VAc-based copolymer having a copolymerization ratio of ethylene of 25 to 70 mol% and polyamide, It is understood that the dirt wiping property and the hair loss resistance are good. As a saponified Et.VAc / PA composite fiber for a mop yarn, the saponification degree of a vinyl acetate unit is 95 mol% or more and the number average molecular weight is 25 or more.
When a composite fiber obtained by compounding a saponified Et.VAc-based copolymer of 0 to 500 with polyamide at a ratio of 20:80 to 80:20 is used, the composite fiber which is a raw fiber for a mop yarn is used. It can be seen that the fiber can be produced by good fiberization processability.

Example 2 The same saponified Et.VAc-based copolymer used in Experiment No. 7 of Example 1 and nylon 6 chips containing 1% by weight of ultramarine blue were used at a weight ratio of 1: 1. The composite fiber was melt-spun to produce a side-by-side composite fiber shown in FIG. 3, which was stretched 4.3 times, and then mechanically crimped to produce a crimped fiber. The crimped fiber was cut into a fiber length of 51 mm to obtain a staple fiber having a single fiber fineness of 2 denier.

80 parts by weight of the above staple fiber and 20 parts by weight of a thermal binder composite fiber (core-sheath type composite fiber having a fineness of 2.5 denier and having a core component of polyethylene terephthalate and a sheath component of copolyester; fiber length 51 mm) were used. The fibers were blended, and a fiber web having an average weight per unit area of 45 g / m ² was prepared by a dry method, and the fibers were entangled with each other by a hydroentanglement treatment to prepare a fiber-entangled nonwoven fabric. Next, the fiber was heat-treated in a hot air atmosphere at 135 ° C. for 5 minutes for drying, thereby bonding and fixing the joining points of the fibers with the binder fibers and causing the fibers to exhibit self-crimping. The resulting nonwoven fabric exhibits a fine crimp of fine fibers, an average basis weight of 67 g / m ² and an apparent density of 0.
It was a bulky nonwoven fabric of 16 g / cm ² . One surface of the nonwoven fabric was subjected to a raising treatment by a conventional method to obtain a raised (naped) fabric (nap fiber length: about 5 to 10 mm).

A wiping cloth was prepared by adding a wetting agent and a bactericide to the above-mentioned napkin cloth. This wiping cloth has a soft and good tactile sensation without stickiness, has a high liquid absorption and liquid retention of water or a mixture of water and oil, has an excellent wiping effect, and has an excellent wiping effect. Suitable for cleaning. Also,
The wiping cloth was evaluated for dirt wiping properties and hair loss resistance by the above-mentioned methods. As a result, as shown in Table 2 below, all were good.

Example 3 The same saponified Et.VAc-based copolymer used in Experiment No. 7 of Example 1 and nylon 6 chips containing 1% by weight of ultramarine in a 1: 1 weight ratio. The composite fiber was melt-spun to produce a side-by-side composite fiber shown in FIG. 3 and stretched 4.0 times to produce a multifilament yarn having a single fiber fineness of 2.5 denier. The multifilament yarn was combined and twisted to form a processed yarn, and the processed yarn was used as a pile yarn to produce a double-woven pile fabric. This is shirred and brushed repeatedly, and the nap fiber length is about 3
mm napkin fabric was obtained.

The above-mentioned napped fiber fabric is heated in hot water at 95 ° C. for 2 hours.
After treated for minutes, dried and then subjected to a backing treatment with acrylonitrile-butadiene rubber to produce a nap-woven fabric having a bulky nap fiber surface in which fibers exhibited micro-crimp. A wetting agent and an oil agent were applied to this nap-woven fabric to obtain a cleaning article. This cleaning article was suitable for cleaning and wiping products having fine grain and irregularities such as bags, shoes, furniture furniture, and clothing made of natural leather, artificial leather, and the like. Further, when the cleaning article made of the nap-woven fabric was evaluated for the dirt wiping property and the hair loss resistance by the above-mentioned methods, all were good as shown in Table 2 below.

[0051]

[Table 2]

[0052]

The cleaning article of the present invention has a dirt wiping property,
It is excellent in cleaning properties such as dust collecting properties, has good hair loss resistance and washing resistance, and can maintain a clean, deep, good color tone and gloss for a long period of time.
Further, the cleaning article of the present invention has good re-contamination resistance during washing, and does not adsorb dirt during washing and does not darken. Further, the cleaning article of the present invention is stiff, has excellent bulkiness and shape stability, and has good cleaning properties and appearance due to its water absorption and hygroscopicity.

[Brief description of the drawings]

FIG. 1 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure showing an example of the cross section shape of / PA conjugate fiber.

FIG. 2 is a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 3 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 4 is a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 5 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 6 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 7 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

FIG. 8 shows a saponified Et.VAc used in the cleaning article of the present invention.
It is a figure which shows another example of the cross-sectional shape of / PA composite fiber.

[Explanation of symbols]

 A Saponified Et / VAc copolymer B Polyamide

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroaki Morioka 1-12-39 Umeda, Kita-ku, Osaka City Kuraray Co., Ltd. (72) Inventor Kiyoji Hirakawa 1621 Sazu, Kurashiki-shi, Okayama Prefecture Kuraray Co., Ltd. 56) References JP-A-3-6961 (JP, A) JP-A-2-99613 (JP, A) JP-A-56-26008 (JP, A) JP-A-55-1379 (JP, A) 48-80820 (JP, A) JP-A-51-38523 (JP, A) JP-A-3-207325 (JP, A) JP-A-3-27457 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) A47L 13/16-13/20 D01F 8/10-8/12

Claims (3)

(57) [Claims] 1. A nap fiber, a nap fiber or a mop yarn mainly comprising a composite fiber of a saponified ethylene-vinyl acetate copolymer having a copolymerization ratio of ethylene of 25 to 70 mol% and a polyamide. And cleaning supplies. 2. The cleaning article according to claim 1, wherein the saponified ethylene-vinyl acetate copolymer constituting the conjugate fiber has a degree of saponification of 95% or more and a number average molecular weight of 250 or more. 3. The cleaning article according to claim 1, wherein the composite ratio of the saponified ethylene-vinyl acetate copolymer: polyamide in the composite fiber is 20:80 to 80:20 by weight.