JP5117152B2 - Flooring wiper - Google Patents

Description

  The present invention relates to a flooring wiper used for cleaning floors and walls of homes, shops, buildings, offices, and windows. More specifically, it mainly relates to wet flooring wipers, and does not use adhesives such as glue, and has excellent water absorption, water release, and stretchability, and is particularly attached to wet floor surfaces. It is related with the flooring wiper which has the outstanding collection property.

  Conventionally, a flooring wiper made of a fibrous sheet for cleaning a floor surface or the like has been widely used for cleaning floors of homes, stores, buildings, offices and the like. These are widely known in which a fiber sheet is attached to a cleaning jig with a handle. An attempt has been made to improve the collection of dust such as hair and dust (hereinafter sometimes referred to as “hair”) by effectively using the area by providing irregularities on the surface of the fiber sheet. Yes.

  Further, these flooring wipers are also known as wet types that improve the wiping property of dirt stuck to a wiping target by wetting the wiping target such as a floor surface or adding water to the flooring wiper itself. Thus, many attempts have been made on wet type flooring wipers that are excellent in the collection of hair and the like.

For example, a floor cleaning sheet impregnated with an aqueous cleaning agent, wherein the floor cleaning sheet releases 0.004 to 0.04 g / 100 cm ² of the aqueous cleaning agent under a load of 400 g / 100 cm ^2. And a floor cleaning sheet that has a large number of irregularities on the surface and is impregnated with 100 to 500% by weight of the aqueous cleaning agent per sheet weight (dry basis) has been proposed (Patent Document 1). reference).

  However, providing unevenness on the surface of the cleaning sheet is effective for improving wiping properties, but hair attached to a wet floor surface sticks to the floor surface with no gap over its entire length. Therefore, the unevenness arranged on the sheet surface has a problem that it can be moved on the floor surface but is difficult to adhere to the sheet surface.

Further, the cleaning surface is composed of a surface layer nonwoven fabric having a basis weight of 6 to 50 g / m ² manufactured by an airlaid method, which is made of a heat-bonding synthetic fiber having a fineness of 6 to 50 dt and a fiber length of 2 to 8 mm. A cleaning sheet having a fiber end index (SI value) of 18,000 to 180,000 has been proposed. Thus, it is described that a large number of fine brush-like fiber ends are formed on the surface of the nonwoven fabric layer, and hair and greasy dirt can be effectively cleaned (see Patent Document 2).

  However, it must be peeled off against the interaction such as surface tension acting between the wet floor surface and hair etc., and it is stretched on the wet floor surface by the fine brush-like fiber ends formed on the surface. It is difficult to entangle hair that is attached.

  Moreover, the bulkiness with water absorption obtained by carrying out a high-pressure water-flow process to the fiber web which comprises 20-50 weight% of crimpable synthetic fibers, and 80-50 weight% of hydrophilic fibers, and making it entangle between fibers. Nonwoven fabrics have been proposed (see Patent Document 3).

  However, the crimpable synthetic fibers used in this are heat-bonded to each other by heat treatment, and the steric crimps that appear are less likely to be deformed. There is a problem that it ends up.

JP 2001-198065 A JP 2004-329585 A Japanese Patent Publication No. 8-291450

  The present invention solves the above-mentioned problems, and its purpose is to adhere to a wet floor surface in particular due to the shape of the crimped fibers constituting the nonwoven fabric, the water absorption and water release properties and stretchability of the nonwoven fabric. An object of the present invention is to provide a cleaning sheet that is excellent in the collection ability of hair and the like.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a flooring wiper excellent in the collection ability of hair attached to a wet floor surface can be obtained, and has reached the present invention. did.

That is, the present invention relates to a flooring wiper comprising a fibrous structure comprising at least a wet heat adhesive fiber containing an ethylene-vinyl alcohol polymer having a fiber length of 20 to 70 mm and a coiled crimped fiber having a fiber length of 30 to 80 mm. The coil structure of the crimped fiber is present on at least one surface of the fiber structure, and the fibers constituting the fiber structure are entangled substantially uniformly with each other. The wet-heat adhesive fibers are fused at the intersections, and the fused intersections are substantially uniformly distributed inside the fiber structure, and the wet-heat adhesion includes the ethylene-vinyl alcohol polymer. The weight ratio of the conductive fiber and the crimped fiber is 40:60 to 10:90, and the apparent density of the fiber structure is 0.04 to 0.1 g / cm ³ . Flooring wiper is provided.
In addition, by passing high-temperature water vapor through a web composed of wet-heat adhesive fibers containing an ethylene-vinyl alcohol polymer and latent crimped fibers, the crimps of the latent crimped fibers are expressed to be crimped fibers. In addition, the present invention provides a method for producing the above-described flooring wiper comprising a fiber structure, comprising the step of fusing the intersections between the fibers constituting the web and the wet heat adhesive fibers.

The flooring wiper provided by the present invention has a special surface shape, is excellent in water absorption, and secures stretchability to obtain a flooring wiper with high performance for collecting hair attached to a wet floor. It is done. As a result, it is possible to wipe off dirt with water and collect hair and the like at the same time. Further, the flooring wiper obtained in the present invention is excellent in workability because of low resistance during wiping.
That is, in the flooring wiper of the present invention, a wet heat adhesive fiber containing at least an ethylene-vinyl alcohol polymer having a fiber length of 20 to 70 mm and a coiled crimped fiber having a fiber length of 30 to 80 mm are in a weight ratio of 40:60. By comprising a fiber structure composed of -10: 90, the wet heat adhesive fiber containing the hydrophilic ethylene-vinyl alcohol polymer and the crimped fiber having the trapping property can be entangled well with each other. . Further, the presence of the coiled crimped shape of the crimped fiber on at least one surface of the fiber structure enables efficient collection of the hair to be wiped off. Further, the fibers constituting the fiber structure are entangled substantially uniformly with each other, and are fused at the intersection with the wet heat adhesive fiber, and the fused intersection is the inside of the fiber structure. Therefore, the crimped fibers are uniformly fixed by the wet heat adhesive fibers, and the hair and the like can be collected without falling off the flooring wiper. Moreover, since there are crimped fibers to the inside, the collected hair and the like can be taken in. Moreover, since the apparent density of the fiber structure is 0.04 to 0.1 g / cm ³ , there are many voids, and the structure of the crimped fibers does not deform, so that the collection property is high up to the inside, and water is contained in the voids. Or collected hair can be taken into the gap.
Further, the method for producing a flooring wiper of the present invention is characterized in that high-temperature water vapor is passed through a web composed of wet heat adhesive fibers containing an ethylene-vinyl alcohol polymer and latent crimped fibers, thereby Since it includes a step of expressing crimps to produce crimped fibers and fusing the intersections between the fibers constituting the web and the wet heat adhesive fibers, the wet heat adhesive fibers and the crimped fibers are uniformly entangled, In addition, a uniform and low-density flooring wiper can be obtained without fusing and breaking the shape of the fiber. Further, the wet heat adhesive fiber can be fused efficiently.

Hereinafter, the present invention will be described in detail.
The crimped fiber used in the present invention is a fiber in which crimps are expressed (exposed) by performing heat treatment on the latent crimped fiber described later, and refers to a fiber having a so-called coiled three-dimensional crimp.
The latent crimped fiber used in the present invention is a side-by-side type or an eccentric core-sheath type composed of at least two components of an A component composed of a polyethylene terephthalate resin and a B component composed mainly of a modified polyethylene terephthalate resin copolymerized with isophthalic acid. It is a composite fiber, and the number of crimps of the crimped fiber after the heat treatment is manifested is preferably 30 pieces / 25 mm or more, and the stretch rate of the crimped fiber is 50% or more. preferable.

In particular, among the resins constituting the latent crimped fiber, the component A is preferably a polyethylene terephthalate resin having an intrinsic viscosity of 0.6 to 0.7, which is a resin used for general polyethylene terephthalate fibers.
On the other hand, for the component B, a modified polyethylene terephthalate resin in which 15 to 40 mol% of isophthalic acid and 0 to 10 mol% of diethylene glycol are copolymerized is used in order to efficiently develop crimp at a lower temperature. If this modification rate is low, sufficient crimps will not be exhibited, and the physical properties of the number of actual crimps after heat treatment of 30 pieces / 25 mm or more and an elongation rate of 50% or more cannot be secured. It can no longer be realized. Further, if the modification rate is higher than this, it is not preferable because the crimping performance can be sufficiently secured, but it becomes difficult to perform stable spinning.

  The latent crimped fiber used in the present invention is, for example, a conventionally known spinneret with a composite ratio (mass ratio) of the above-described A component and B component A component: B component = 40: 60 to 60:40, and a spinning temperature of 270. By melt spinning at ˜290 ° C., a side-by-side type or eccentric core-sheath type composite fiber can be obtained.

The fineness of the latent crimped fiber used in the present invention is preferably 0.5 to 10 dtex, more preferably 1 to 5 dtex, and further preferably 1.5 to 3 dtex. If the fineness is thin, it is difficult to produce the fiber itself, it is difficult to secure the fiber strength, and it may be difficult to express a beautiful coiled crimp in the subsequent crimping process after forming into a nonwoven fabric. .
On the other hand, if the fineness is too thick, the polyethylene terephthalate component of the fiber becomes rigid and it is difficult to express sufficient crimps, which is not preferable.

  The preferred fiber length of the latent crimped fiber used in the present invention is preferably in the range of 10 to 100 mm. More preferably, it is 20-90 mm, More preferably, it is 30-80 mm. If the fiber length is short, it becomes difficult to form a fiber web in a later step, and in the subsequent crimping step, the fibers are not sufficiently entangled with each other, and as a result, sufficient stretchability cannot be secured. There is a case. In addition, when the fiber length is long, not only is it difficult to form a fiber web with a uniform basis weight, but also a lot of entanglement of fibers occurs at the time of web formation, and as a result, when crimps are expressed. May interfere with each other and may not be able to exhibit sufficient elasticity.

The resin constituting the wet heat adhesive fiber used in the present invention is an ethylene-vinyl alcohol copolymer that is a resin component that is softened with hot water of about 95 to 100 ° C. and is self-adhesive or adheres to other fibers. It is necessary .

  Here, as the ethylene-vinyl alcohol copolymer which is a wet heat adhesive fiber or wet heat adhesive component, a copolymer in which 10 to 60 mol% of ethylene units are copolymerized with polyvinyl alcohol is preferable, and 30 to 50 mol of ethylene units. % Copolymerized is particularly preferred. The vinyl alcohol portion preferably has a saponification degree of 95 mol% or more. Due to the large number of ethylene units, wet heat adhesion can be obtained without exhibiting hot water solubility. The degree of polymerization can be selected as necessary, but is usually about 400 to 1500.

  When the ethylene unit content is less than 10 mol%, the ethylene-vinyl alcohol copolymer easily swells and gels with low-temperature water, and may change its form once wetted with water. . On the other hand, if it exceeds 60 mol%, the hygroscopicity is lowered and fiber fusion due to wet heat becomes difficult to develop, so that practical hardness may not be ensured.

  The cross-sectional shape of the wet heat-adhesive fiber made of these resins is not particularly limited, and is not limited to a round shape or a typical cross-sectional shape that is a general solid cross-sectional shape, but may have various cross-sectional shapes such as a hollow cross-sectional shape. Can do. Furthermore, in the case where it is difficult to achieve the purpose with a fiber made only of a wet heat adhesive resin, such as when a higher fiber strength is required, it is preferable to use a composite fiber with another fiber. The wet heat adhesive resin is not particularly limited as long as a part or all of the wet heat adhesive resin is continuously present in the length direction on the fiber surface. For example, a core-sheath type, a sea-island type, a side-by-side type, a multilayer bonding type, a random composite, a radial bonding type, and the like can be given. Or the fiber which coat | covered the resin which has wet heat adhesiveness to the fiber which consists of another fiber-forming polymer may be sufficient. These fibers can be colored by kneading a pigment as necessary.

  In this case, the resin other than the wet heat adhesive resin or the partner fiber coated with the wet heat adhesive resin can include resin components or fibers made of polyester, polyamide, polypropylene, etc., but heat resistance, dimensional stability In view of the above, polyesters, polyamides and the like having a melting point higher than that of the ethylene-vinyl alcohol copolymer are preferably used.

  Examples of the polyester include terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, α, β- (4-carbophenoxy) ethane, 4,4-dicarboxydiphenyl, 5-sodium sulfoisophthalic acid and the like. Aliphatic dicarboxylic acids such as aliphatic dicarboxylic acids, azelaic acid, adipic acid, sebacic acid or their esters, ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, Mention may be made of fiber-forming polyesters composed of diols such as neopentyl glycol, cyclohexane-1,4-dimethanol, polyethylene glycol and polytetramethylene glycol, and 80 mol% or more of the structural units are ethylene terephthalate units. Preferred That's right.

  Examples of the polyamide include an aliphatic polyamide and a semi-aromatic polyamide mainly composed of nylon 6, nylon 66, and nylon 12, and may include a polyamide containing a small amount of the third component.

  The preferred fiber length of the wet heat adhesive fiber used in the present invention is preferably in the range of 10 to 100 mm. More preferably, it is 15-85 mm, More preferably, it is 20-70 mm. When the fiber length is short, the fiber web formation in the subsequent process becomes difficult, and the entanglement between the fibers decreases, and in the subsequent wet heat bonding process with high-temperature steam, the fibers are not sufficiently bonded to each other. As a result, sufficient strength may not be ensured. In addition, when the fiber length is long, it becomes difficult to form a fiber web having a uniform basis weight, and a lot of fibers are entangled at the time of web formation. There are cases where it becomes a hindrance when expressing contraction and sufficient elasticity cannot be expressed.

Next, the manufacturing method of the nonwoven fabric which comprises the flooring wiper of this invention is demonstrated.
The above-mentioned wet heat adhesive fiber and latent crimped fiber are formed into a fiber web using a card method, an air lay method or the like. The mixing ratio of the latent crimped fibers is preferably 60% by weight to 90% by weight. If the ratio of the latent crimped fibers is less than 60% by weight, it becomes difficult to develop sufficient stretchability. On the other hand, if it exceeds 90% by weight, the proportion of wet heat adhesive fibers becomes small, the form of the flooring wiper becomes unstable, and the sheet is easily broken by the force applied during cleaning. Furthermore, the hydrophilicity of the cleaning sheet is low, and sufficient cleaning liquid cannot be held inside, so it is necessary to work while spraying the cleaning liquid on the floor during cleaning, resulting in poor work efficiency. There is.

  The formed fiber web is sent to the next process by a belt conveyor and exposed to a high-temperature / high-pressure steam flow, so that wet heat-adhesive fibers exhibit fiber fusion due to moist heat and crimps appear in latent crimped fibers. . This crimp expression causes the fiber to move while changing its shape like a coil, and the three-dimensional entanglement between the fibers appears. In the present invention, the fiber web subjected to the minimum fiber entanglement is subjected to high-temperature and high-pressure steam treatment, and by applying heat, the fiber crimps and entanglement are simultaneously expressed, and the crimps are efficiently expressed. Things will be possible. Furthermore, the steam treatment enables efficient fiber fusion with wet heat adhesive fibers existing inside the nonwoven fabric.

  In addition, the water vapor used is not particularly limited as long as the desired fiber crimp expression and appropriate fiber entanglement and fiber fusion associated therewith can be realized, and may be set depending on the material and form of the fiber used. It is preferable to use water vapor having a pressure of 0.1 to 2.0 MPa, more preferably 0.2 to 1.5 MPa, and still more preferably 0.3 to 1.0 MPa. For example, if the water vapor pressure is too high or too strong, the fibers forming the fiber web may move more than necessary at that momentum, resulting in turbulent formation, or the fibers may be entangled more than necessary. is there.

  In this way, after expressing the crimp of the latent crimped fiber in the fiber web and expressing the fiber fusion of the wet heat adhesive fiber, moisture may remain in the nonwoven fabric. Must. With respect to drying, it is necessary that the fibers on the nonwoven fabric surface in contact with the heating element for drying do not adhere to the heat of drying to reduce the stretchability, and any method can be used as long as this can be achieved. Therefore, you may use a large drying facility such as a cylinder dryer or tenter that has been used for drying nonwoven fabrics in the past. When it is a level that can be dried by means, a non-contact method such as far-infrared irradiation, microwave irradiation, or electron beam irradiation, a method of blowing or passing hot air, and the like are preferable.

The non-woven fabric produced in this way is obtained from crimped fibers and wet heat adhesive fibers as described above, and is optimal for the flooring wiper that is the object of the present invention. That is, since the flooring wiper obtained from the nonwoven fabric has an excellent water absorption rate, water discharge rate, and water absorption rate, the liquid held inside the sheet is discharged to the outside by the pressure applied to the cleaning sheet during cleaning. Thus, the interaction due to the surface tension between the floor surface and the hair or the like can be weakened, and the hair or the like can be lifted from the floor surface. In addition, the crimped fiber constituting the nonwoven fabric has a substantially coiled crimp after the occurrence of the crimp, and the coiled crimped fiber is stretched so that the hair or the like that is lifted up is formed into a sheet. It becomes easy to collect inside, and it is possible to make it easy to firmly catch the collected hair and the like by restoring the elongation. In addition, the coiled crimp reduces the frictional resistance with the floor surface and facilitates cleaning.
In addition, the wet and heat-adhesive fibers give the cleaning sheet an excellent water absorption rate, water discharge rate, and water absorption rate, and when exposed to a high-temperature, high-pressure steam stream, the fibers adhere to each other, ensuring morphological stability. can do.

  The average radius of curvature of the circle formed by the crimped fiber coil is 50 to 200 μm, preferably 60 to 160 μm, more preferably 70 to 130 μm. Here, the average radius of curvature is an index representing the average size of a circle formed by the coil of crimped fibers. When this value is larger than 200 μm, the formed coil has a loose shape. Therefore, it is disadvantageous for exhibiting sufficient expansion and contraction performance. On the other hand, when a coiled crimp such that this value is smaller than 50 μm is expressed, the stress for expanding and contracting the coil increases, and it becomes difficult to obtain sufficient expansion and contraction performance. It is also very difficult to produce latently crimped fibers that exhibit such crimps.

Furthermore, the wet wiper made of the nonwoven fabric of the present invention preferably has a water absorption rate of 500% to 2000%. This is because in the wiping mechanism of the present invention that the floor surface dust is lifted and then taken into the wiper, the amount of water necessary to lift the floor surface dust is kept without scattering unnecessary water on the floor surface. It is necessary to do.
And this water absorption rate becomes like this. More preferably, it is 600%-1800%, More preferably, it is 700%-1600%. When this value is less than 500%, as the cleaning operation is continued, moisture is removed from the floor surface or the remaining moisture held by the wiper due to drying or the like decreases, which is not preferable. Moreover, when it exceeds 2000%, the weight of the flooring wiper after water absorption becomes large, and the handleability of a wiper will worsen. In addition, the amount of moisture released to the floor during cleaning becomes large, which is not preferable from the viewpoint of workability when performing a wiping operation.

  In this way, the moisture retained by the wiper can be squeezed out of the wiper by simply pressing the handle of the flooring wiper and using the resistance against the floor surface, when the floor surface is cleaned, necessary and sufficient amount of water. is necessary. The ratio of the liquid that can be released at this time is the water discharge ratio in the present invention. In the flooring wiper made of the nonwoven fabric of the present invention, this ratio is 30% to 80%, so that a sufficient cleaning liquid can be removed from the wiper during cleaning. It is possible to feed the dirt to the surface and to raise the foreign substances on the floor surface. And in order to be able to clean the floor more efficiently, this value is preferably 40% to 80%, more preferably 50% to 80%. When this water discharge rate is less than 30%, the amount of water for raising the dust on the floor surface is reduced, which is not preferable. On the other hand, when this value is 80% or more, it is not preferable because useless moisture will be scattered on the floor surface.

  Furthermore, the wet flooring wiper of the present invention takes the liquid discharged onto the floor surface in this way onto the non-woven fabric that forms the wiper together with the dust on the floor surface during cleaning, and / or the next cleaning. It is brought into the area and contributes to the cleaning of the part, but at this time, the liquid once discharged is collected from the floor surface, but at this time, it can be recovered by quickly absorbing from the floor surface. is important. This performance depends on the water absorption speed of the flooring wiper of the present invention, and this time needs to be 1 second or less. And it is more preferably 0.9 seconds or less, and still more preferably 0.8 or less. If this time is slower than 1 second, the cleaning speed does not increase, and it takes too much time for cleaning, or the wiper is short of moisture and it becomes difficult to reliably catch dirt on the floor. . Or the floor surface is immersed in water, and the problem that the operation | work which collect | recovers liquids separately is generate | occur | produced.

  The movement of the web when the wet flooring wiper of the present invention collects foreign matter stains typified by hair from the floor surface will be described in more detail. The wiper of the present invention is subjected to a wiping operation on the floor surface. In addition, the web is stretched once, the gaps between the constituent fibers are expanded, and the wiping operation is continued, and in this state, after passing over the foreign matter dirt, the wiper surface is crimped into a coiled fiber. When the force applied for wiping is removed by being caught in the web, the wiper itself is restored from the stretched state, and the stretched component fiber is restored while the web is restored. The dirt foreign matter is fixed to the surface. Actually, the contaminants on the floor surface are sequentially taken in during the repetition of this operation performed on the floor surface. In this operation, the dirt surface is sufficiently caught and the web surface and. Alternatively, in order to ensure the performance of fixing to the inside, in the wet flooring wiper of the present invention, the wiper nonwoven fabric performs a sufficient expansion / contraction operation during the cleaning operation so that the dirt foreign matter on the floor surface can be captured more reliably. It is preferable to have a 20% elongation recovery rate of at least%. The recovery rate is more preferably 98% or more.

  And in order to implement | achieve the favorable expansion-contraction operation | movement at the time of such wiping operation | movement, it is important that the flooring wiper of this invention has moderate resistance between a floor surface. It can be said that the basic wiping effect can be realized by this wiping resistance. Therefore, the coefficient of dynamic friction with the floor surface in the wiper of the present invention is preferably 0.15 to 0.30. More preferably, it is 0.20-0.29, More preferably, it is 0.25-0.28. If the coefficient of dynamic friction is 0.15 or less, the wiping resistance is too small, there is no feeling of wiping, and it is inconvenient because excessive force may be applied at the time of work. Since the wiping resistance is large, the force applied to the wiper increases, which is not preferable.

As for the fabric weight of the nonwoven fabric used for this invention, 10-200 g / m < ² > is preferable, More preferably, it is 20-100 g / m < ² >. If the basis weight is less than 10 g / m ² , sufficient physical properties cannot be obtained, while if it exceeds 200 g / m ² , uniform crimp expression may not be obtained.

  In the nonwoven fabric used in the present invention, when the wet heat adhesive fiber and the crimped fiber are mixed substantially uniformly, the uniformity of the crimped degree of the crimped fiber is important for the entanglement uniformity defined by the present invention. In addition, in the manufacturing process, when wet-heat adhesive fibers and latent crimped fibers are mixed almost uniformly and crimps are expressed by heating, it is particularly entangled that the crimped fibers obtained are uniformly crimped. The uniformity of the degree of crimping can be evaluated by the number of crimps per unit length. The uniformity of the degree of crimp can also be evaluated by the radius of curvature of the coiled portion of the crimped fiber.

  Although the flooring wiper of the present invention is mainly used for cleaning a floor surface, the cleaning surface is basically not limited as long as it is a surface that can be cleaned particularly in a wet state. Therefore, it can also be applied to parts such as windows and walls in homes, stores, buildings, offices, etc., and by using these parts for cleaning, hair, -Cleans the surface to be cleaned by removing dusts efficiently and accurately and taking them into the non-woven wiper.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. In addition, each physical-property value in an Example was measured with the following method.

(1) Uniformity of entanglement Evaluate the number of crimps near both surfaces of the cross section perpendicular to the main surface of the nonwoven fabric and near the center, and when the ratio of the minimum value to the maximum value is 75% or more, it is assumed to be uniform Other than that, it was non-uniform.

(2) Uniformity of the fused intersections The number of fusion points per unit area near both surfaces of the cross section perpendicular to the main surface of the nonwoven fabric and near the center is evaluated, and the minimum value relative to the maximum value When the ratio was 75% or more, it was assumed to be uniform, and other than that, it was assumed to be non-uniform.
(3) Number of crimps Evaluation was made according to JIS L1015 “Testing method for chemical fiber staples” (8.12.1).

(4) Average radius of curvature (μm)
Using a scanning electron microscope (SEM), a photograph in which the cross section of the nonwoven fabric was magnified 100 times was taken. Obtain the radius of the circle when drawing a circle along the spiral of the fiber in the cross-sectional photograph taken of the nonwoven fabric, and the fiber forms one or more spirals (coils). Is the radius of curvature. In addition, when the fiber was drawing the spiral in the ellipse shape, the ellipse was fitted and 1/2 of the sum of this major axis and minor axis was made into the curvature radius. However, the ratio of the major axis to the minor axis of the ellipse to be applied to the fiber spiral is excluded in order to eliminate the case where the crimped fiber does not exhibit sufficient coil crimp or the case where the spiral shape of the fiber is observed obliquely. Only those in the range of 0.8 to 1.2 were measured.
The measurement was performed on an SEM image taken for an arbitrary cross section, and measurement was performed with n number = 100, and the average value was used.

(5) Weight per unit area (g / m ² )
Measured according to JIS L1913 “Testing method for general short fiber nonwoven fabric”.

(6) Thickness (mm), density (g / cm ³ )
The thickness was measured according to JIS L1913 “Test method for general short fiber nonwoven fabric”, and the density was calculated from this value and the basis weight measured by the method (3).

(7) Water absorption rate (%)
Measured according to JIS L1907 “Test method for water absorption of textile products”.

(8) Water discharge rate (%)
The test piece after measuring the water absorption rate by the method of (5) was quickly placed on the acrylic plate, applied with a load of 4 g per unit area (1 cm ² ), left for 1 minute, and then released onto the acrylic plate. The water content was measured, and the water discharge rate was calculated from this value and the water content before applying the load.

(9) Water absorption speed (second)
Measured according to JIS L1907 “Test method for water absorption of textile products”.

(10) 20% elongation recovery rate (%)
Measured according to JIS L1096 “General Textile Test Method”. However, the evaluation in the present invention was a recovery rate at a uniform elongation of 20%, and the measurement was performed in the width (CD) direction of the nonwoven fabric.

(11) Coefficient of dynamic friction The coefficient of dynamic friction was measured by the following method. In other words, a test piece cut out to a length of 15 cm and a width of 7.5 cm is attached so that the bottom surface is covered with 7.5 cm × 7.5 cm and the weight of the entire 300 g weight is covered, and firmly fixed on a horizontal table. Placed on the flooring. A yarn was attached to the side of the weight to which the test piece was attached, and the other end of this yarn was attached to a load cell of a tensile tester (manufactured by Shimadzu Corporation, “Autograph AG-IS”) via a pulley. The tensile tester was operated, the weight was moved horizontally at a speed of 150 mm / min, and the dynamic friction resistance value at that time was measured. A dynamic friction coefficient was calculated from the obtained dynamic friction resistance value and the weight of the weight.
The measurement was performed in the width (CD) direction of the nonwoven fabric.

(12) Hair adhesion 10 hairs having a length of 10 cm were evenly spread on the flooring material for evaluation. The test piece cut out to 20 cm × 20 cm was made to absorb water so as to have the water absorption measured by the method of (5), and was attached to a commercially available flooring cleaning jig (manufactured by Kao Corporation: Quickle Wiper). Place the cleaning jig with the test piece on the flooring material for evaluation, move it as it is for 1 m, place the sheet on the hair gathered in front, draw it to the original position, and gently lift it up and adhere. The number of hairs was measured and the average of three was obtained.
The measurement was performed in the width (CD) direction of the nonwoven fabric.
○ ・ ・ ・ 7 to 10 △ ・ ・ ・ 3 to 6 ×× 0 to 2

Example 1
As wet heat adhesive fiber, the core component is polyethylene terephthalate, the sheath component is an ethylene-vinyl alcohol copolymer (Kuraray Co., Ltd., “Sophista”, 3.3 dtex × 51 mm length, core-sheath mass ratio 50/50, mechanical crimp number 21 pieces / 25 mm) was prepared. Side-by-side type composite staple comprising a polyethylene terephthalate resin (component A) having an intrinsic viscosity of 0.65 and a modified polyethylene terephthalate resin (component B) copolymerized with 20 mol% isophthalic acid and 5 mol% diethylene glycol as latent crimped fibers. Fibers (Kuraray Co., Ltd., “N-780”, 1.7 dtex × 51 mm length, mechanical crimp number 12/25 mm, 130 ° C. × 62 minutes after heat treatment for 1 minute 62/25 mm) were prepared. A wet weight heat-adhesive fiber and latent crimped fiber were mixed at a weight ratio of 30:70, and a parallel web having a basis weight of 50 g / m ² was produced by a card method. This card web was introduced into a steam spraying device by a belt conveyor, and 0.5 MPa high-temperature steam was sprayed so as to pass in the thickness direction of the card web to perform steam treatment to obtain a nonwoven fabric for a flooring wiper. .

(Example 2)
Except for blending the wet heat adhesive fiber and the latent crimped fiber at a weight ratio of 10:90 and producing a parallel web having a weight per unit area of 50 g / m ² by the card method, it was used for a flooring wiper in the same manner as in Example 1. A nonwoven fabric was obtained.

(Comparative Example 1)
Except for blending the wet heat adhesive fiber and the latent crimped fiber at a weight ratio of 70:30 and producing a parallel web having a basis weight of 50 g / m ² by the card method, it was used for a flooring wiper in the same manner as in Example 1. A nonwoven fabric was obtained.

(Comparative Example 2)
As a wet heat adhesive fiber, a core-sheath type composite fiber having a core component of polyethylene terephthalate and a sheath component of ethylene-vinyl alcohol copolymer (manufactured by Kuraray Co., Ltd., “Sophista”, 3.3 dtex × 51 mm length, core-sheath mass ratio 50 : 50, number of machine crimps 21 pieces / 25 mm). As the latent crimped fiber, a core-sheath type composite fiber (ESC, 4.4 dtex × 51 mm length, manufactured by ES Fiber Visions) whose core component is polypropylene and whose sheath component is polyethylene was prepared. A wet weight heat-adhesive fiber and latent crimped fiber were mixed at a weight ratio of 30:70, and a parallel web having a basis weight of 50 g / m ² was produced by a card method. This card web was heat-treated at 130 ° C. using a hot air processor to obtain a nonwoven fabric for flooring wipers.

(Comparative Example 3)
For a flooring wiper in the same manner as in Comparative Example 2, except that the wet heat adhesive fiber and the latent crimped fiber were mixed at a weight ratio of 70:30 and a parallel web having a basis weight of 50 g / m ² was produced by the card method. A nonwoven fabric was obtained.

(Comparative Example 4)
Viscose rayon fiber (Daiwabow Rayon Co., Ltd., “Corona”, 1.7 dtex × 40 mm length) and latent crimped fiber were mixed at a weight ratio of 30:70 without using wet heat adhesive fiber, and the card method was used. A nonwoven fabric for a flooring wiper was obtained in the same manner as in Example 1 except that a parallel web having a basis weight of 50 g / m ² was produced.

  According to the present invention, a flooring wiper having a special surface shape, excellent water absorption, and ensuring stretchability can provide a flooring wiper having high collection performance such as hair attached to a wet floor surface, A cleaning tool using a flooring wiper is useful as a cleaning tool used in homes, stores, buildings, offices, and the like.

Claims (5)

A flooring wiper comprising a fiber structure comprising at least a wet heat adhesive fiber containing an ethylene-vinyl alcohol polymer having a fiber length of 20 to 70 mm and a coiled crimped fiber having a fiber length of 30 to 80 mm, A coiled crimped shape of the crimped fiber is present on at least one surface of the fiber structure, and the fibers constituting the fiber structure are entangled substantially uniformly with each other, and the wet heat adhesiveness Fused at the intersections with the fibers, and the fused intersections are distributed substantially uniformly within the fiber structure, and the wet heat adhesive fibers containing the ethylene-vinyl alcohol polymer are crimped. A flooring yarn characterized by having a fiber weight ratio of 40:60 to 10:90 and an apparent density of the fiber structure of 0.04 to 0.1 g / cm ^3. Par. The flooring wiper according to claim 1, wherein the fibrous structure contains water. The flooring wiper according to claim 1 or 2, wherein the wet heat adhesive fiber is a core-sheath type composite fiber comprising a sheath part made of an ethylene-vinyl alcohol polymer and a core part made of a hydrophobic resin. The flooring wiper according to claim 1, 2, or 3, wherein the crimped fibers are side-by-side type composite fibers composed of two types of polyester fibers having different shrinkage rates. While letting high-temperature water vapor pass through a web composed of wet-heat-adhesive fibers containing an ethylene-vinyl alcohol polymer and latent crimped fibers, the latent crimped fibers are expressed as crimped fibers. The method for producing a flooring wiper according to claim 1, 2, 3, or 4, comprising a step of fusing the intersections of the fibers constituting the web and the wet heat adhesive fibers. .