JPWO2014132690A1 - Non-woven - Google Patents

Abstract

The present invention has a high liquid absorption and release power of liquids such as water and chemicals, and further has an excellent bulkiness and flexibility, and has low irritating to the skin and good wiping property. Provide a non-woven fabric suitable for use in wipers for personal wipes and beauty. The nonwoven fabric of the present invention is a nonwoven fabric composed of 20 to 80% by mass of multi-leaf flat cross-sectional polyester fibers and 20 to 80% by mass of cellulosic fibers, and the cross-sectional shape of the multi-leaf flat cross-sectional polyester fibers is circumferential. It is a non-woven fabric formed by blending polyester fibers having a flat shape having six or more convex portions on top and defining the flatness and the irregularity.

Description

  The present invention has excellent water absorption and high liquid retentivity such as water and chemicals, and further has excellent bulkiness, flexibility and touch, so it is suitably used for skin cosmetics or wiping. It is related with the nonwoven fabric made. The present invention has a high liquid storability, especially when used for cosmetics, and has the ability to release cosmetic liquids as needed, and has high wiping properties without damaging the skin when wiping. The wiped soil relates to a nonwoven suitable for wipers that can be retained within the nonwoven and prevent recontamination.

  Conventionally, various nonwoven fabrics have been proposed as nonwoven fabrics for interpersonal wiping used in a wet state. For example, by incorporating 40 to 77% by mass of polyester fiber and polyolefin fiber in the entire nonwoven fabric, a bulky nonwoven fabric that prevents bulk sag when wet is proposed (see Patent Document 1). .) However, although this proposed nonwoven fabric has good touchability by using polyolefin fibers, it does not have sufficient rigidity because it does not have sufficient rigidity, and also has sufficient wiping properties. There is a problem that is not.

  Moreover, the nonwoven fabric for wipers which was excellent in bulkiness, wiping off property, and a feeling of actual use by using atypical cross-section fiber and fibrillated fiber is proposed (refer patent document 2). However, if the fiber has an irregular cross section, the liquid retention and wiping properties of the nonwoven fabric are not improved regardless of the shape, and the fibrillated fiber often has a sharp fiber cross section, and is used for interpersonal wiping. There is a problem that there is a risk of damaging the skin when used in the skin.

  Furthermore, as a nonwoven fabric having both liquid retention and wiping properties, a nonwoven fabric including an atypical cross-sectional fiber having pores has been proposed (see Patent Document 3). In the case of the nonwoven fabric according to this proposal, the liquid retaining property is improved by the cross-sectional shape, but there is a problem that the liquid retaining performance is not sufficient because the shape retaining property is inferior, for example, the pores are crushed.

  The main fiber has a single fiber cross-section with a flatness of 2.0 or less and two or more openings having an opening angle of less than 120 degrees, and is excellent in tensile strength and permeability. Article sheet materials have been proposed (see Patent Document 4). However, although this proposed nonwoven fabric has good anti-permeability due to irregular reflection of light, there is a problem that the nonwoven fabric is not sufficiently flexible because of its low flatness.

JP 2010-84297 A JP 2010-81987 JP 2009-79320 A JP 2012-197546 A

  Therefore, the object of the present invention is to have a high liquid absorption and discharge capability of liquids that could not be achieved only with the above-mentioned conventional technology, natural fibers and cellulosic fibers, and have moderate bulkiness and flexibility, and touch An object of the present invention is to provide a non-woven fabric suitable for wiper use such as for interpersonal wiping and beauty use, which has less irritation to the skin and good wiping properties.

  In order to solve the above-mentioned problems, the present invention can improve the wiping property without damaging the skin by using a flat multi-leaf cross-sectional polyester fiber and a cellulosic fiber together. The inventors have found that the liquid absorbing power and the liquid retaining power can be improved, and that the liquid can be discharged during use, and the present invention has been made.

That is, the nonwoven fabric of the present invention is a nonwoven fabric obtained by blending 20 to 80% by mass of flat multi-leaf cross-sectional polyester fiber and 20 to 80% by mass of cellulosic fiber, and has a cross-sectional shape of the flat multi-leaf cross-sectional polyester fiber. Is a flat shape having 6 or more protrusions, and the flat multi-leaf cross-section polyester fiber connects the maximum length of the cross-section A, the maximum width B, and the vertices of adjacent protrusions in the maximum unevenness portion. When the length of the line is C, and the length of the perpendicular drawn from the line connecting the vertices of the convex portion to the bottom of the concave portion is D, the flatness of the following formula (1) and the following formula (2) A nonwoven fabric characterized by satisfying the degree of profile at the same time.
Flatness (A / B) = 2.0 to 3.0 (1)
・ Deformation degree (C / D) = 1.0 to 5.0 (2)
According to a preferred aspect of the nonwoven fabric of the present invention, the maximum length A of the cross section of the multi-leaf flat cross-sectional polyester fiber is set as the axis of symmetry, and the cross section maximum width B among the line segments between the opposite convex vertices. When the longest length excluding is E, the convex portion ratio defined by the following formula (3) is satisfied.
Convex part ratio (E / B) = 0.6 to 0.9 (3)
According to the preferable aspect of the nonwoven fabric of this invention, the single fiber fineness of the said flat multi-leaf cross-section polyester fiber is 2.0 dtex or less.

  The said nonwoven fabric of this invention is used suitably especially as a nonwoven fabric for wipers.

  According to the present invention, it has a high absorbability and release ability of liquids such as water and chemicals, and also has moderate bulkiness and flexibility, has low irritation to the skin and has good wiping properties, particularly A non-woven fabric suitable for interpersonal wiping and cosmetics can be obtained.

FIG. 1 is a cross-sectional view for illustrating the cross-sectional shape of a multi-leaf flat cross-sectional polyester fiber provided in the nonwoven fabric of the present invention having a plurality of (eight) convex portions on the circumference of the fiber cross-section.

  Next, the nonwoven fabric of this invention is demonstrated in detail.

  The cellulosic fiber used in the present invention is at least one cellulosic material selected from natural fibers such as hemp, cotton and silk, regenerated fibers such as viscose rayon, cupra and solvent-proof cellulose, and semi-synthetic fibers such as acetate. Selected from fibers. Among them, regenerated fibers such as viscose rayon and solvent-spun cellulose are preferably used from the viewpoint of handleability and versatility.

  The cellulosic fibers used in the present invention preferably have a flat shape in which any cross-sectional shape has irregularities on the circumference. The greater the number of irregularities on the circumference, the higher the liquid-absorbing property, and further, the liquid is uniformly diffused over the entire surface of the nonwoven fabric by capillary action, resulting in less water spots.

  The number of convex portions on the circumference is preferably 5 or more, more preferably 8 or more. Moreover, it is preferable that the shape of an uneven | corrugated | grooved part is a curved shape from a viewpoint of the touch property.

  Moreover, it is preferable that the single fiber fineness of a cellulosic fiber is 1.0-5 dtex. The single fiber fineness is more preferably 1.2 to 2.2 dtex. When the single fiber fineness is less than 1.0 dtex, it is easy to wind around the card cylinder, and the process passability may be significantly reduced. As a result, the unevenness of the nonwoven fabric tends to occur. Moreover, when the single fiber fineness exceeds 5 dtex, particularly when used for interpersonal use, the texture of the nonwoven fabric becomes stiff and tends to be undesirable in use. Moreover, since the space | gap between fibers becomes large when a single fiber becomes thick, there exists a tendency for liquid retention to fall remarkably.

  The fiber length of the cellulosic fibers is highly entangled with other constituent fibers such as polyester fibers, maintains liquid absorbency, liquid retention and release properties, and obtains a non-woven fabric that has a uniform feel and good productivity. From the viewpoint, it is preferably 30 to 80 mm. The fiber length is more preferably 35 to 64 mm. Examples of commercially available cellulose fibers include rayon manufactured by Daiwabo Rayon, Japan.

  The nonwoven fabric of this invention WHEREIN: The content rate of the said cellulose fiber is 20-80 mass%. When the mixing ratio (content ratio) of the cellulosic fibers is less than 20% by mass, the water absorption impregnating the liquid is weakened, so the power to keep moisture in the nonwoven fabric is weakened, and no liquid is required from the nonwoven fabric during use. Will flow down. Furthermore, in the nonwoven fabric of this invention, since the flexibility specific to a cellulosic fiber is impaired, the feeling of touch at the time of use worsens. On the other hand, when the mixing ratio of the cellulosic fibers exceeds 80% by mass, the impregnated liquid is retained in the fibers, and a sufficient amount of liquid cannot be quickly released when necessary. Furthermore, since the bulkiness of the nonwoven fabric is impaired, the amount of liquid retained is reduced, and the voluminous hand feeling is also impaired. The preferable content rate of a cellulosic fiber is 40-60 mass%.

  The polyester constituting the polyester fiber used in the present invention includes a high molecular polymer produced by a condensation reaction of terephthalic acid and ethylene glycol or butylene glycol, and sebacic acid, adipic acid, trimellitic acid, isophthalic acid, and paraoxybenzoic acid. It means a condensate of odorous acid and the like with ethylene glycol or butylene glycol, and a polyester polymer containing other polyesters.

  The flat multilobal polyester fiber used in the present invention is a flat fiber having a convex section having a cross-sectional shape of 6 or more.

  The flat multilobal polyester fiber used in the present invention is a flat polyester fiber having a cross section having six or more convex portions. If the number of convex portions present in the circumferential shape of the cross-sectional shape is less than 6, the gaps formed between adjacent fibers are reduced, resulting in poor water absorption and liquid retention. Moreover, since the cross-sectional shape is a flat shape, it becomes possible to form a space | gap between fibers and can obtain the outstanding bulkiness. Furthermore, since the falling property per single fiber constituting the nonwoven fabric is improved, a soft texture can be obtained.

  In FIG. 1, an example of the single fiber cross-sectional shape of the flat multileaf cross-section polyester fiber used by this invention is shown. In FIG. 1, the cross-sectional shape of the multileaf flat cross-section polyester fiber with which the nonwoven fabric of this invention which has several (8 pieces) convex part on the circumference of a fiber cross section is illustrated is illustrated.

  In the present invention, in the cross-sectional shape, a flat polyester fiber having 6 or more convex portions is used, preferably 8 or more, and more preferably 10 or more. Further, the upper limit value of the number of convex portions is preferably 12. Moreover, it is preferable that the shape of a convex part is the curved shape from a viewpoint of the touch property.

The flat multilobal cross-sectional polyester fiber used in the present invention has a flat multilobal cross-sectional shape in a single fiber cross section that satisfies the flatness of the following formula (1) and the deformity of the following formula (2) at the same time. It consists of fibers.
Flatness (A / B) = 2.0 to 3.0 (1)
・ Deformation degree (C / D) = 1.0 to 5.0 (2)
Here, A is the length of the longest line segment of the cross section of the flat multilobal shape. Said B says the length of the largest line segment which connects between the vertexes of the convex part which intersects perpendicularly with the length A of the line segment. Said C is the largest unevenness which said flat multilobal form makes, and says the length of the line segment which connects between the vertexes of an adjacent convex part. And said D says the length of the perpendicular drawn from the line which connects between said convex parts to the bottom point of a recessed part.

  That is, according to a preferred aspect of the nonwoven fabric of the present invention, the flat multi-leaf cross-sectional polyester fiber used in the above mixed cotton is a convex portion adjacent to the maximum length of the cross section A, the maximum width B, and the maximum uneven portion. When the length of the line connecting the vertices of C is C, and the length of the perpendicular line extending from the line connecting the vertices of the convex portion to the bottom point of the concave portion is D, the flatness of the above formula (1) It consists of the polyester-type fiber which satisfies the irregularity degree of following formula (2) simultaneously.

  In the present invention, if the above flatness (A / B) is less than 2.0, the hair fallability of the fibers is deteriorated, and a soft texture cannot be obtained. On the other hand, when the flatness (A / B) exceeds 3.0, the harshness is small and it becomes easy to get loose. Moreover, there exists a tendency for the yarn-making property to deteriorate and the deformity. The flatness (A / B) is preferably 2.0 to 2.7, more preferably 2.0 to 2.5.

  In addition, the degree of irregularity (C / D) represents the size of the concave portion between the convex portions in the flat multilobal shape. When the value is large, the concave portion is small and the value is small. Means that the recess is large. When the degree of profile (C / D) increases, the recesses become shallower and the gaps formed between the fibers also become smaller, so that the water-absorbing ability is lowered and the dirt scraping property tends to be lowered. Therefore, the degree of profile (C / D) is 5.0 or less. On the other hand, if the degree of irregularity (C / D) is too small, the concave portion of the fiber cross section tends to bend and the flat shape tends to be unable to be maintained. Furthermore, since it becomes easy to receive fiber damage by abrasion, there exists a possibility that skin may be damaged when it rubs with skin. Therefore, the degree of irregularity (C / D) is 1.0 or more. The degree of profile (C / D) is in the range of 1.0 to 5.0 from the above point. Furthermore, the degree of profile (C / D) is more preferably 2.0 to 4.0 in terms of water absorption and wiping properties.

  The content rate in the nonwoven fabric of the flat multi-leaf cross-section polyester fiber used by this invention is 20-80 mass%. When the mixing ratio (content ratio) of the flat multilobal cross-section polyester fiber is less than 20% by mass, the nonwoven fabric loses its bulk, the liquid retaining property is deteriorated, and the texture of the nonwoven fabric is also hardened. In addition, when the mixing ratio (content ratio) of the flat multi-leaf cross-sectional polyester fiber exceeds 80% by weight, the bulkiness of the nonwoven fabric is improved, but the gap between the fibers becomes too large, so that liquid flows down from the nonwoven fabric during use. There is a problem of end. The content of the flat multilobal polyester fiber in the nonwoven fabric is preferably 40 to 60% by mass.

The flat multilobal cross-section polyester fiber used in the present invention has the maximum length A of the cross section as the axis of symmetry, and is the longest length excluding the maximum cross section width B among the opposing line segments between the vertices. When the thickness is E, it is made of polyester fiber satisfying the convex portion ratio defined by the following formula (3).
Convex part ratio (E / B) = 0.6 to 0.9 (3)
The convex portion ratio (E / B) has a meaning as an index for measuring the degree of distortion of a substantially elliptical shape obtained when a line connecting the convex vertices having the maximum widths B and E and the maximum length A is drawn. When the convex portion ratio is too small, the depth of the concave portion is reduced, and the cross-sectional shape thereof is infinitely approximate to a flat cross shape. Therefore, the void ratio between the fibers decreases, and the water absorption and retention capacity decreases. Moreover, when it touches skin, since it becomes close to a flat cross shape, the number of convex parts which contact is reduced, and a touch feeling and softness also fall. Therefore, the convex portion ratio is preferably 0.6 or more.

  On the other hand, when the convex portion ratio is too large, when the concave and convex portions of the fibers are fitted, the portion where the concave portion is completely blocked increases, resulting in a decrease in the porosity and a decrease in water absorption and retention. Moreover, when the skin is touched, the shape becomes a shape close to a flat hexagon, so that the number of convex portions to be contacted is reduced, and the feeling of touch and softness are lowered. For these reasons, the convex portion ratio (E / B) is preferably 0.9 or less. The convex portion ratio (E / B) is preferably 0.6 to 0.9 from the above point. Furthermore, the convex portion ratio (E / B) is preferably 0.6 to 0.8, more preferably 0.7 to 0.8, from the viewpoint of the balance.

  The single fiber fineness of the flat multilobal polyester fiber used in the present invention is preferably 2.0 dtex or less. The single fiber fineness is more preferably 1.0 to 2.0 dtex, still more preferably 1.2 to 1.8 dtex. If the single fiber fineness exceeds 2 dtex, the rigidity unique to the polyester fiber becomes strong, so that the stimulation of the touch feeling becomes strong and the soft texture may be impaired. Furthermore, since the voids formed between the fibers are too large, the liquid retention amount is increased, but the liquid retention property is deteriorated, and the liquid tends to flow down from the nonwoven fabric during use. On the other hand, when the single fiber fineness is smaller than 1.0 dtex, the process passability in the card process is deteriorated and the productivity tends to be lowered.

  Moreover, it is preferable that the fiber length of a flat multi-leaf cross-section polyester fiber is 30-64 mm from a viewpoint of fiber omission of a nonwoven fabric. The fiber length is more preferably 35 to 51 mm.

  Moreover, the nonwoven fabric of this invention may contain the heat sealing | fusion fiber as another fiber. By including the heat-sealing fiber in the nonwoven fabric, the morphological stability, which is one of the important functions when used for the wiping operation, can be improved by heat-sealing the heat-sealing fiber. The heat-sealing fiber may be a single-component heat-sealing fiber, but a composite thermal property such as a side-by-side type or a core-sheath type consisting of two or more types of resin components including a portion not fused by heat treatment. Use of a fused fiber is a more desirable mode because the fiber strength is maintained by a portion that is not fused.

  As components constituting the heat-sealing fiber, 6 nylon and polyethylene, polypropylene and polyethylene, polypropylene and ethylene-vinyl acetate copolymer, polyester and polypropylene, polyester and polyethylene, 6 nylon and 66 nylon, and high density polyester A combination of low density polyester and the like can be exemplified. A preferable mixing ratio of the heat-sealing fibers is 5 to 20% by mass with respect to the mass of the nonwoven fabric.

  Next, the manufacturing method of the nonwoven fabric of this invention is demonstrated.

  The above-described flat multi-leaf cross-sectional polyester fiber and cellulose fiber are formed into a fiber web with a card. As described above, the mixing ratio (mass ratio) of the flat multilobal cross-section polyester fiber and the cellulose fiber is flat multilobal cross section polyester fiber / cellulosic fiber = 20/80 to 80/20, preferably flat poly Leaf cross-section polyester fiber / cellulosic fiber = 30/70 to 70/30.

  Next, the fiber web formed by the card is sent to a spunlace process by feed lattice, and subjected to a high-pressure hydroentanglement process to be processed into a sheet shape. The nonwoven fabric after the spunlace processing is sent to a drying process by a conveyor, and when the heat-treated fibers are used, heat treatment is performed simultaneously with drying at a temperature at which only the heat-bonded fibers are melted.

The non-woven fabric produced and produced in this way has excellent water absorption and softness and is suitable as a non-woven fabric for personal wiping and beauty purposes.

  That is, the sheet obtained from the nonwoven fabric produced in this way has excellent water absorption and high liquid retention properties such as water and chemicals, and further has excellent bulkiness, flexibility, and touch. Is suitable as a non-woven fabric used for cosmetics or cleaning. In the case of use for cosmetics, the liquid retainability of the cosmetic liquid is high, and it can have a performance that can be released as needed. For wiping, it has high wiping property without damaging the skin, and the wiped dirt is caught in the concave part of the fiber surface, so it is a nonwoven fabric that can keep the dirt in the nonwoven fabric and prevent recontamination, High wiping effect.

  Specific examples of end use include baby butt wipes, wet tissues, cleansing sheets, facial sheets, and the like.

  Next, although the nonwoven fabric of this invention is demonstrated in detail by an Example, this invention is not limited only to an Example. Each physical property value in the examples is measured by the following method, and is an average value for three times of measurement.

<Method for testing thickness of nonwoven fabric>
The thickness of five non-woven fabrics having a basis weight of 50 g / m ² is measured with a caliper.

[Test method for liquid retention rate]
Measured according to the water absorption rate of JIS L 1907 7.2 (2010 edition). A 10 cm square test piece is cut out from a nonwoven fabric having a basis weight of 50 g / m ² and the mass (A) is measured. The test piece was immersed in ion exchange water for 30 seconds. Thereafter, one corner of the test piece is picked up from the liquid by tweezers, and the mass (B) after 1 minute is measured.
The liquid retention rate (C) is calculated by the following formula.
Liquid retention ratio C (%) = (BA) / A × 100.

<Remaining rate (liquid retention) test method>
Measured according to the water absorption rate of JIS L 1907 7.2 (2010 edition). A 10 cm square test piece is cut out from a nonwoven fabric having a basis weight of 50 g / m ² and the mass (A) is measured. The test piece was immersed in ion exchange water for 30 seconds. Thereafter, a corner of the test piece is picked up from the liquid by tweezers, and the mass (D) after 5 minutes is measured.
The remaining rate (E) is calculated by the following formula.
E (%) = (D−A) / A × 100.

<Wipeability>
A 10 cm square test piece is cut out from a non-woven fabric having a basis weight of 50 g / m ² and is used after being folded in four. The test piece is impregnated with 3 times the mass of water. The performance was compared by applying lipstick to the arms of five subjects and wiping them off. The contents of the evaluation are as follows, and ○ was accepted.
○: Good wiping property Δ: Some lipstick remains ×: Most lipstick cannot be wiped off.

<Feel>
A 10 cm square test piece is cut out from a non-woven fabric having a basis weight of 50 g / m ² and is used after being folded in four. The test piece is impregnated with 3 times the mass of water. Five test subjects' arms were wiped, and the tactile sensation was evaluated according to the following criteria.
○: The touch is good. Δ: The skin after wiping is somewhat uncomfortable. ×: The skin after wiping is tinged.

<Hand feeling (texture)>
A 10 cm square test piece is cut out from a non-woven fabric having a basis weight of 50 g / m ² and is used after being folded in four. The test piece is impregnated with 3 times the mass of water. Five subjects held the test piece and evaluated the tactile sensation according to the following criteria.
○: The texture is soft. Δ: The texture is slightly hard. X: The texture is hard.

[Example 1]
Flat multileaf polyester fiber having a flatness of 2.1, an irregularity of 2.7, a convexity ratio of 0.8, and a cross-sectional shape of 8 convexities (single fiber fineness: 1.7 dtex, fiber length : 51 mm) 20% by mass and rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) after uniformly blending, a card fiber web having a basis weight of 60 g / cm ² was produced by a conventional method, A water jet water pressure of 50 kg / cm ² , a speed of 1 m / min, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width, and a sheet by double-sided processing, then at a temperature of 120 ° C. It dried and obtained the nonwoven fabric of 50 g / m < ² > of fabric weights. The fiber configuration of the nonwoven fabric is shown in Table 1, and the evaluation results are shown in Table 2.

[Example 2]
A flat multi-leaf polyester fiber having a flatness of 2.1, an irregularity of 2.7, a convexity ratio of 0.8, and a cross-sectional shape of 8 convexities (single fiber fineness 1.7 dtex, fiber length 51 mm) and 50% by weight of rayon fiber (single fiber fineness 1.7 dtex, fiber length 51 mm) were uniformly mixed, and then a card fiber web having a basis weight of 60 g / cm ² was produced by a conventional method. Water pressure is 50 kg / cm ² , speed is 1 m / min, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width after producing a sheet by double-sided processing, and further drying at a temperature of 120 ° C., A nonwoven fabric having a basis weight of 50 g / m ² was obtained. The fiber configuration of the nonwoven fabric is shown in Table 1, and the evaluation results are shown in Table 2.

[Example 3]
Flat multileaf polyester fiber having a flatness of 2.1, an irregularity of 2.7, a convexity ratio of 0.8, and a cross-sectional shape of 8 convexities (single fiber fineness: 1.7 dtex, fiber length : 51 mm) 80% by mass and rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) were uniformly mixed, and then a card fiber web having a basis weight of 60 g / cm ² was prepared by a conventional method. Jet water pressure 50 kg / cm ² , speed 1 m / min, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width after producing a sheet by double-sided processing, further dried at a temperature of 120 ° C., A nonwoven fabric having a basis weight of 50 g / m ² was obtained. The fiber configuration of the nonwoven fabric is shown in Table 1, and the evaluation results are shown in Table 2.

[Comparative Example 1]
Flat multileaf polyester fiber having a flatness of 2.1, an irregularity of 2.7, a convexity ratio of 0.8, and a cross-sectional shape of 8 convexities (single fiber fineness: 1.7 dtex, fiber length : 51 mm) 15% by mass and rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) after uniformly blending, a card fiber web having a basis weight of 60 g / cm ² is produced by a conventional method, A water jet water pressure of 50 kg / cm ² , a speed of 1 m / min, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width, and a sheet was prepared by double-sided processing, and then at a temperature of 120 ° C. It dried and obtained the nonwoven fabric of 50 g / m < ² > of fabric weights. The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 2]
Flat multileaf polyester fiber having a flatness of 2.1, an irregularity of 2.7, a convexity ratio of 0.8, and a cross-sectional shape of 8 convexities (single fiber fineness: 1.7 dtex, fiber length : 51 mm) 85% by mass and rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) after uniformly blending, a card fiber web having a basis weight of 60 g / cm ² was produced by a conventional method, A water jet water pressure of 50 kg / cm ² , a speed of 1 m / min, a nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width, a sheet was prepared by double-sided processing, and further dried at a temperature of 120 ° C. Thus, a nonwoven fabric having a basis weight of 50 g / m ² was obtained. The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 3]
A card fiber web having a rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) and a mass per unit area of 60 g / cm ² is prepared by a conventional method, and the water jet water pressure is 50 kg / cm ² and the speed is 1 m / Minute, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width, a sheet was prepared by double-sided processing, and further dried at a temperature of 120 ° C. to obtain a nonwoven fabric having a basis weight of 50 g / m ² . . The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 4]
An irregular cross-section polyester fiber having a flatness of 1.0 and having six convex portions on the circumference of the cross-sectional shape (single fiber fineness: 1.7 dtex, fiber length: 51 mm) and rayon fiber (single fiber) After finely blending 20% by mass (fineness: 1.7 dtex, fiber length: 51 mm), a card fiber web having a basis weight of 60 g / cm ² is prepared by a conventional method, the water jet water pressure is 50 kg / cm ² , and the speed is 1 m / min, nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm width after producing a sheet by double-sided processing, and further drying at a temperature of 120 ° C., a nonwoven fabric with a basis weight of 50 g / m ² Obtained. The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 5]
An irregular cross-section (Y-type) polyester fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) having three convex portions on the circumference of the cross-sectional shape and rayon fiber (single fiber fineness: 1. (7 dtex, fiber length: 51 mm) After uniformly blending 20% by mass, a card fiber web having a basis weight of 60 g / cm ² was prepared by a conventional method, the water jet water pressure was 50 kg / cm ² , the speed was 1 m / min, Nozzle shape: After producing a sheet by double-sided processing with 0.1 mmφ, 0.6 mm pitch, 834 holes and 500 mm effective width, it was further dried at a temperature of 120 ° C. to obtain a nonwoven fabric having a basis weight of 50 g / m ² . The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 6]
An irregular cross-section polyester fiber having a C-shaped cross section (single fiber fineness: 1.7 dtex, fiber length: 51 mm) and rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) 20 mass% After uniformly blending, a card fiber web having a basis weight of 60 g / cm ² is produced by a conventional method, the water pressure of the water jet is 50 kg / cm ² , the speed is 1 m / min, the nozzle shape: 0.1 mmφ, 0.6 mm pitch After producing a sheet by double-sided processing with 834 holes and 500 mm effective width, it was further dried at a temperature of 120 ° C. to obtain a nonwoven fabric having a basis weight of 50 g / m ² . The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

[Comparative Example 7]
After uniform blending of 80% by mass of round cross-section polyester fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm) and 20% by mass of rayon fiber (single fiber fineness: 1.7 dtex, fiber length: 51 mm), the basis weight A card fiber web having a thickness of 60 g / cm ² is prepared by a conventional method, the water pressure of the water jet is 50 kg / cm ² , the speed is 1 m / min, the nozzle shape: 0.1 mmφ, 0.6 mm pitch, 834 holes, 500 mm effective width After producing a sheet by double-sided processing, it was further dried at a temperature of 120 ° C. to obtain a nonwoven fabric having a basis weight of 50 g / m ² . The fiber configuration of the nonwoven fabric is shown in Table 3, and the evaluation results are shown in Table 4.

  As Examples 1 to 3 show, a nonwoven fabric made of 20 to 80% by mass of a flat cross-sectional polyester fiber and 20 to 80% by mass of rayon having a fiber configuration having 8 convex portions on the circumference of the fiber cross section Since the liquid retention rate is high, it is easy to retain liquids such as water and chemicals, and the residual rate is low, so it was confirmed that the retained chemicals can be released and used effectively. Moreover, the wiping property, hand feeling (texture) and touch were also good.

  On the other hand, as shown in Comparative Example 1, when the content of the cellulosic fiber exceeds 80% by mass, the touch is good, but the bulkiness of the nonwoven fabric is impaired. Since the system fiber retains the chemical solution in the fiber, the residual rate is high, which causes poor chemical solution release.

  Furthermore, as shown in Comparative Example 2, when the content of the flat multi-leaf cross-sectional polyester exceeds 80% by mass, the suppleness of the cellulosic fibers is impaired, so that the touch is deteriorated.

  On the other hand, as shown in Comparative Examples 3 to 7, when other irregular cross-section polyester fibers that are not flat are used, the liquid retention is increased, but the residual ratio is remarkably low. Retention is weak and causes liquid flow when using nonwoven fabric. Moreover, since it is not flat, the texture is hard and the touch is remarkably deteriorated.

Claims (4)

A non-woven fabric comprising 20 to 80% by mass of a multi-leaf flat cross-sectional polyester fiber and 20 to 80% by mass of a cellulose-based fiber, wherein the cross-sectional shape of the multi-leaf flat cross-sectional polyester fiber is 6 or more on the circumference The maximum length of the cross section of the multi-leaf flat cross-sectional polyester fiber is A, the maximum width is B, and the length of the line connecting the vertices of adjacent convex portions in the maximum uneven portion is C, When the length of the perpendicular line extending from the line C connecting the vertices of the convex portion to the bottom point of the concave portion is D, the flatness of the following formula (1) and the deformity of the following formula (2) are satisfied simultaneously. A nonwoven fabric characterized by that.
Flatness (A / B) = 2.0 to 3.0 (1)
・ Deformation degree (C / D) = 2.0 to 5.0 (2) When the maximum length A of the cross-section of the multi-leaf flat cross-section polyester fiber is the axis of symmetry, and the maximum length excluding the maximum cross-section width B is E among the opposing convex-to-vertex line segments The nonwoven fabric according to claim 1, wherein the ratio of convex portions defined by the following formula (3) is satisfied.
Convex part ratio (E / B) = 0.6 to 0.9 (3)   The nonwoven fabric according to claim 1 or 2, wherein the single-fiber fineness of the multi-leaf flat cross-sectional polyester fiber is 2.0 dtex or less.   The nonwoven fabric for wipers which consists of a nonwoven fabric in any one of Claims 1-3.

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