KR101798140B1 - Non-woven fabric and method for producing non-woven fabric - Google Patents

Abstract

The nonwoven fabric (1) of the present invention is a nonwoven fabric in which a web composed of long fibers (2) is fixed by a heat fusion portion (3). In the nonwoven fabric 1 of the present invention, a part of the long fibers 2 is broken so that only one end 20a is fixed by the heat-sealed portion 3 and the free end 20b on the other end side is thick And a fiber 21. In the nonwoven fabric 1 of the present invention, the increase rate of the fiber diameter of the fiber 21 having the free end portion 20b thickened is 15% or more.

Description

TECHNICAL FIELD [0001] The present invention relates to a nonwoven fabric and a nonwoven fabric,

The present invention relates to a nonwoven fabric made of long fibers.

For example, sponge-bonded nonwoven fabrics are widely used for absorbent articles such as disposable diapers because they have high breaking strength, excellent processability, and are economical. However, in spunbonded nonwoven fabrics, it is difficult to improve the feel (feel) due to the lack of softness in the whole of the spunbonded nonwoven fabric.

For example, Patent Document 1 discloses a nonwoven fabric in which a spunbonded nonwoven fabric is laminated on a base material and monofilaments are laminated and needle punching is performed to reveal an arc fiber loop on the surface. However, when the nonwoven fabric in which the circular-shaped fiber loops disclosed in Patent Document 1 are exposed is used in an absorbent article such as a disposable diaper, the circular-shaped fiber loops are hung on the skin, which deteriorates the feeling of use. In addition, Patent Document 1 does not describe the tip shape of the constituent fibers at all.

Further, for example, in Patent Document 2, a stretched continuous filament nonwoven fabric is peeled and separated at the boundary in the thickness direction as a boundary, and a fiber peeled from the fiber bonding portion or a fiber stretched in a loop shape And the like are disclosed. However, since the standing-up nonwoven fabric disclosed in Patent Document 2 is believed to contain a lot of fibers stretched in a loop shape in the manufacturing method, when used for an absorbent article such as a disposable diaper, the loop-shaped fiber is caught on the skin and deteriorates the feeling of use. In addition, Patent Document 2 does not describe the tip shape of the constituent fibers at all.

Patent Document 3 describes a planted hair sheet in which short fibers are formed by an adhesive. The leading end of the flocked sheet is not thickened, and the cut surface of the fiber is exposed, so that the tip ends may be piled up and the tactile sensation may be deteriorated. Further, since other fibers are adhered to the nonwoven fabric by using an adhesive, there is a risk of adversely affecting the skin or irritating the skin due to a medicine such as an adhesive to be used. In addition, when used, there is a problem of flaking of the flocking fibers and exposure of the adhesive surface.

As a technique for bricking the constituent fibers of the nonwoven fabric, for example, a method of processing the nonwoven fabric using a needle punch or a sand paper, or implanting the nonwoven fabric using a flocking technique can be considered.

For example, Patent Document 4 discloses a method in which a weak portion is formed on a constituent fiber by applying a mechanical force to a nonwoven fabric by a close process, and then a nonwoven fabric having a weak portion is passed through a roller coated with a sandpaper, In a non-woven fabric. Patent Document 5 discloses a method of treating a napped sheet in which a raised hair sheet is subjected to a dynamic effect treatment and then subjected to abrasion treatment using a sand paper.

Patent document 6 discloses a nonwoven fabric manufacturing method in which a web is shrunk, and then the shrunk web is treated using a needle punch. Patent Document 7 discloses a method for producing a nonwoven fabric sheet by simply stretching the constituent fibers of the nonwoven fabric sheet until the fibers are broken. The nonwoven fabric and the like manufactured by the manufacturing methods of the above-described Patent Documents 4 to 7 certainly have a soft touch feeling.

However, both of the method for producing the brushed nonwoven fabric described in Patent Document 4 and the method for treating the woven mattress sheet described in Patent Document 5 all use a sand paper to process the nonwoven fabric, so that the nonwoven fabric is greatly damaged, It is difficult to reduce the decrease in strength. In addition, since the method of manufacturing the nonwoven fabric described in Patent Document 6 is performed using a needle punch, the production speed is low and it is difficult to suppress the cost. In addition, since the method of producing the nonwoven fabric sheet described in Patent Document 7 is brushed only by the stretching treatment, it is difficult to reduce the deterioration of the strength of the obtained nonwoven fabric of the brushed nonwoven fabric by giving a large damage to the nonwoven fabric by the stretching treatment.

Japanese Patent Application Laid-Open No. 11-19015 Japanese Patent Application Laid-Open No. 2002-302861 Japanese Patent Application Laid-Open No. 2001-198997 Japanese Patent Application Laid-Open No. 50-65645 Japanese Patent Application Laid-Open No. 59-187665 Japanese Patent Application Laid-Open No. 54-106676 US4187343A

Therefore, an object of the present invention is to provide a nonwoven fabric which is fluffy throughout and has improved tactile feel despite its high breaking strength. Further, the nonwoven fabric has less loop-shaped fibers and is less likely to be caught on the skin, thereby improving the feel.

It is still another object of the present invention to provide a method for producing a nonwoven fabric in which the constituent fibers are worn to obtain a nonwoven fabric having good feel and the deterioration of the obtained nonwoven fabric breaking strength of the obtained woven nonwoven fabric is reduced. It is another object of the present invention to provide a method for producing a nonwoven fabric in which the nonwoven fabric in which the constituent fibers are woven is obtained and the production speed is fast and the cost can be suppressed.

The present invention relates to the provision of a nonwoven fabric having a soft feeling as a whole despite having high breaking strength and having improved tactile sensation. The present invention also relates to providing a nonwoven fabric having few loop-shaped fibers and being hard to catch on skin and having improved feel.

The present invention relates to a nonwoven fabric in which a web made of long fibers is fixed by a heat fusion portion.

The nonwoven fabric includes fibers in which a part of the long fibers is broken so that only one end portion is fixed by the heat fusion portion and the free end portion on the other end side is thick.

The present invention also relates to a method for producing a nonwoven fabric in which the constituent fibers are worn and the nonwoven fabric is excellent in touch and the degradation of the nonwoven fabric breaking strength of the obtained woven nonwoven fabric is reduced. The present invention also relates to a method for producing a nonwoven fabric in which constituent fibers are woven in a nonwoven fabric and at the same time, production speed is high and cost can be suppressed.

The present invention provides a method for producing a nonwoven fabric by subjecting each of a plurality of portions of a nonwoven fabric to a partial stretching process at a temperature of 50 DEG C or less and bridging the constituent fibers of the nonwoven fabric to the partially stretched nonwoven fabric .

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a nonwoven fabric having a soft feeling as a whole and having improved tactile feel despite the high breaking strength. In addition, it is possible to provide a nonwoven fabric in which the number of loop-shaped fibers is small, and the skin is hardly caught, thereby improving the feel.

According to the present invention, it is possible to provide a nonwoven fabric in which the constituent fibers are woven with good feel and a reduced feeling of the nonwoven fabric breaking strength of the obtained woven nonwoven fabric is reduced. It is also possible to provide a method for producing a nonwoven fabric in which the nonwoven fabric in which the constituent fibers are woven is obtained, and the manufacturing speed is fast and the cost can be suppressed.

1 is a perspective view showing one embodiment of the nonwoven fabric of the present invention.
Fig. 2 is a perspective view showing a fiber in which the free end of the nonwoven fabric shown in Fig. 1 is thick.
3 is a schematic view showing a preferred apparatus for producing the nonwoven fabric shown in Fig.
4 is a schematic view showing a preferred apparatus for producing the nonwoven fabric shown in Fig.
5 is a schematic view showing a method for measuring the fiber diameter at the tip of the nonwoven fabric of the present invention.
Fig. 6 is a schematic view showing a method of measuring the number of brushed fibers of the nonwoven fabric of the present invention.
Fig. 7 is an exploded plan view showing a state in which the pull-on type disposable diaper is expanded and expanded, for explaining an example of the use form of the non-woven fabric of the present invention.
8 is a sectional view taken along the line X1-X1 in Fig.
Fig. 9 is a schematic view showing a preferred processing apparatus used in the nonwoven fabric manufacturing method of the present invention.
Fig. 10 is a schematic view showing an oblique view of a partial stretch processing portion of the processing apparatus shown in Fig.
11 is an enlarged cross-sectional view of a main part of the partial stretching part shown in Fig.
Fig. 12 is a schematic view showing a brushed machined portion of the machining apparatus shown in Fig. 9 obliquely.
13 is a schematic view showing a method of measuring the number of constituent fibers of the nonwoven fabric of the present invention.

Hereinafter, the nonwoven fabric of the present invention will be described with reference to Figs. 1 to 5 on the basis of preferred embodiments thereof.

1, the nonwoven fabric 1 of the present embodiment is a nonwoven fabric in which a web composed of long fibers 2 is intermittently fixed by a heat fusion portion 3, and a part of the long fibers 2 is broken, Only the one end portion 20a is fixed by the heat fusion portion 3 and the free end portion 20b on the other end side is thick. The nonwoven fabric 1 will be described below with the longitudinal direction of the nonwoven fabric 1 as the Y direction and the width direction of the nonwoven fabric 1 as the X direction, as shown in Fig. On the other hand, with respect to the nonwoven fabric 1, the MD direction along the fiber orientation direction is determined to be the longitudinal direction (Y direction) and the CD direction perpendicular to the fiber direction is determined to be the width direction (X direction) according to the orientation direction of the constituent fibers. Therefore, in the following description, the longitudinal direction (Y direction) and the MD direction mean the same direction, and the width direction (X direction) and the CD direction mean the same direction.

The nonwoven fabric 1 of the present embodiment will be described in detail. The nonwoven fabric 1 is obtained by compressing or fusing the fibers of the long fibers 2 intermittently with the heat fusion portion 3, Bonded nonwoven fabric. Hereinafter, this is referred to as an original spunbond nonwoven fabric. Since the nonwoven fabric 1 has a part of the long fibers broken, the nonwoven fabric 1 is also fluffy even when it is thinner than a conventional spunbonded nonwoven fabric.

Here, the term "long fiber" means a fiber having a fiber length of 30 mm or more, and is preferably a continuous fiber having a fiber length of 150 mm or more because a nonwoven fabric having high breaking strength can be obtained.

The basis weight of the nonwoven fabric 1 is preferably from 5 to 100 g / m 2, more preferably from 5 to 25 g / m 2, from the viewpoint of obtaining a cheap and good touch feeling and also from the viewpoint of processability.

The breaking strength value of the nonwoven fabric 1 is preferably 5.00 N / 50 mm or more, and more preferably 8 to 30 N / 50 mm, from the viewpoints of preventing tearing during use and suitability for processing. On the other hand, from the viewpoint of achieving the breaking strength of the nonwoven fabric 1, the breaking strength value of the original spunbonded nonwoven fabric is preferably 7 N / 50 mm or more, more preferably 10 to 50 N / 50 mm. According to the present invention, the breaking strength value of the nonwoven fabric 1 produced by the brassiere method described later can be lowered from the breaking strength value of the original spunbonded nonwoven fabric compared with the other brushed method. The breaking strength of the nonwoven fabric 1 and the original spunbonded nonwoven fabric preferably satisfies the above-described range in the X direction (CD direction). The breaking strength ratio (breaking strength of the nonwoven fabric 1 / breaking strength of the original nonwoven fabric) between the nonwoven fabric 1 and the original nonwoven fabric is preferably 0.5 to 1.0, more preferably 0.7 to 1.0. The breaking strength is measured by the following method.

[Measurement of breaking strength]

A rectangular measuring piece having a size of 200 mm in the X direction (width direction) and 50 mm in the Y direction (length direction) is cut out from the nonwoven fabric 1 or the original spunbonded nonwoven fabric under the environment of 22 ° C and 65% RH. This cut-out rectangular measuring piece is used as a measurement sample. The measurement sample is mounted on a chuck of a tensile tester (e.g., Tensilon tensile tester "RTA-100" manufactured by Orientech) so that the X direction is the tensile direction. The distance between the chucks is set to 150 mm. The measurement sample is pulled at 300 mm / minute, and the maximum load point up to the sample break is taken as the breaking strength in the X direction. A rectangular measuring piece having a size of 200 mm in the Y direction and 50 mm in the X direction is cut out and used as a measurement sample. The measurement sample is mounted on the chuck of the tensile tester so that the Y direction is the tensile direction. The breaking strength in the Y direction is obtained in the same manner as the aforementioned measuring method of the breaking strength in the X direction.

The nonwoven fabric 1 of the present embodiment is also characterized by its good touch.

Conventionally, characteristic values indicating tactile feel are well known, and in particular, characteristic values at KES made by KATO TECH KK are generally known (Reference: Standardization and Analysis of Texture Evaluation (2nd edition), author TOKIO Kawabata, published July 10, 1980). Especially LC (compressive load-compressive warp curve linearity), WC (compressive capacity) and RC (compression resilience), which are three characteristic values called compression characteristics, are known to show particularly fluffiness. The compression characteristics are calculated from the deformation amount when the load is 0.5 to 50 gf / cm 2 (0.5 to 10 gf / cm 2 for high sensitivity measurement). However, a very thin cloth such as a nonwoven fabric having a small basis weight (5 to 25 g / m 2) did not show a large difference, and the correlation with touch was not great. In addition, since the load when the human touches the absorbent article feels a touch with a very light load around 1 g / cm < 2 >, the characteristic value in a range smaller than the conventional load is considered to be useful in order to exhibit the original touch, A new characteristic value was found from the load between gf / ㎠ and 1gf / ㎠ and the strain at that time. This property value is a numerical value that clearly shows the difference in tactile sensation between the spunbonded nonwoven fabric and the air-through nonwoven fabric, and can represent a nonwoven fabric as a new characteristic value indicating the tactile feel of the spunbonded nonwoven fabric.

[Compression Characteristic Value at Micro Load]

Under the environment of 22 deg. C and 65% RH, in the present invention, a compression characteristic value at the time of a minute load is defined as a new characteristic value indicating tactile sensation. The measurement was carried out at 22 deg. C and 65% RH. Measurement of data as a basis for calculating the compression characteristic value at the time of minute load was performed using KES FB3-AUTO-A (trade name) manufactured by KATO TECH K.K. Three nonwoven fabrics (1) were cut into 20 cm x 20 cm, and measurement samples were prepared. Next, one of the measurement samples should be placed facing up on the test stand (if not brushed or if both sides are brushed, measure both sides and use the smaller one). Next, the steel sheet is compressed between steel plates having a circular surface having an area of 2 cm 2. The compression rate is 20 탆 / sec, the maximum compression load is 10 gf / cm 2, and the recovery process is also measured at the same speed. At this time, the displacement amount between the steel plates is x (mm), the load is y (gf / cm2), and the position of the point at which the load is detected is measured in the compression direction with x = 0. The value of x becomes larger as it is compressed.

The compression characteristic value at the minute load is obtained by extracting the thickness deformation amount at the time of the minute load from the measured data (x, y). Specifically, the first load, which is not the recovery process, and the strain data at the time between 0.30gf / ㎠ and 1.00gf / ㎠ are extracted and the approximate straight line is obtained by the least squares method for the relationship between x and y , And the slope at that time is taken as the characteristic value (unit (gf / cm2) / mm). Three points are measured in one measurement sample. A total of 9 samples of 3 samples are measured. The characteristic values of each of the nine positions are calculated, and the average value thereof is set as the compression characteristic value at the time of the minute load of the nonwoven fabric.

The present inventors have found that the compression characteristic value at the time of a minute load has a correlation with touch, and found that there is a strong correlation particularly when the original nonwoven fabric is the same. The lower the value of the compression characteristic (at the time of a minute load), the more likely it is to be crushed by a small load, and it is possible to express the feeling of feeling (especially fluffiness) feeling human touch. For example, the compression characteristic value of the original spunbonded nonwoven fabric having a basis weight of 5 to 25 g / m < 2 >, which is not subjected to the processing described later, is 20.0 (gf / , The surface of the nonwoven fabric 1 subjected to the processing described later on the spunbonded nonwoven fabric is liable to crumble and becomes 18.0 (gf / cm2) / mm or less. (Gf / cm < 2 >) / mm or less and 15.0 gf / cm < 2 > / mm or less, in terms of tactile sensation, in the nonwoven fabric 1 subjected to the processing of the original spunbonded nonwoven fabric of 5 to 25 g / mm or less and more preferably 10.0 (gf / cm 2) / mm or less from the viewpoint of a feeling of touch similar to an air through nonwoven fabric having good feel. The lower limit of the compression characteristic value of the nonwoven fabric 1 subjected to the processing treatment on the original spunbonded nonwoven fabric having a basis weight of 5 to 25 g / m 2 is not particularly limited, but is about 1.00 (gf / cm 2) / mm from the viewpoint of production. It has been difficult to subject the original spunbonded nonwoven fabric having a low basis weight, such as 5 to 25 g / m 2, to the processing such as the conventional brassiere method so as to have such a characteristic value without significantly reducing the breaking strength.

The long fibers 2 (constituent fibers of the original spunbonded nonwoven fabric) constituting the nonwoven fabric 1 mainly include thermoplastic resins, and examples of the thermoplastic resins include polyolefin resins, polyester resins, polyamide resins, Nitrile resins, vinyl resins, vinylidene resins, and the like. Examples of the polyolefin-based resin include polyethylene, polypropylene, and polybutene. Examples of the polyester-based resin include polyethylene terephthalate and polybutylene terephthalate. Examples of the polyamide-based resin include nylon and the like. Examples of the vinyl resin include polyvinyl chloride and the like. Examples of the vinylidene resin include polyvinylidene chloride and the like. One kind of such various resins may be used singly or a mixture of two or more kinds thereof may be used, or a denatured product of these various resins may be used. The nonwoven fabric 1 may also be a composite fiber. As the composite fibers, side-by-side fibers, core-sheath fibers, core-sheath fibers having an eccentric crimp, and split fibers can be used. When the conjugate fiber is used, it is preferable that a soft brushed nonwoven fabric is obtained by using core-sheath fibers whose core is polypropylene and sheath is polyethylene. Further, the long fibers 2 may also be fibers obtained by adding small amounts of additives such as a fiber coloring agent, an antistatic agent, a lubricant, and a hydrophilic agent. The diameter of the long fibers 2 is preferably 5 to 30 占 퐉, more preferably 10 to 20 占 퐉, before the processing described later.

It is preferable that the original spunbonded nonwoven fabric forming the nonwoven fabric 1 is formed of a polypropylene resin which is a polyolefin-based resin from the viewpoint of radioactivity. The polypropylene resin is preferably 5 to 100% by weight, more preferably 25 to 50% by weight, of at least one of a random copolymer, a homopolymer and a block copolymer, from the viewpoint of smoothness, 80% by weight. These copolymers or homopolymers may be mixed and other resins may be mixed. However, mixing of a homopolymer of polypropylene and a random copolymer is preferable in that the yarn is not easily broken at the time of molding. As a result, the crystallinity of the fibers is lowered, so that the brushed fibers themselves are softened and the feel is improved. At the same time, the bridging fibers are compatible with the nonwoven fabric strength and the brushed fibers are easily broken at the fused portions such as embossing. Peeling at the joining portion is eliminated, the brushed fabric is shortened, pilling is hardly caused, and appearance is good. Further, the distribution of the melting point is widened, so that the sealing property is improved. Furthermore, it is preferable to copolymerize with ethylene or an alpha -olefin as a random copolymer based on the propylene component, and an ethylene propylene copolymer resin is particularly preferable. From the same viewpoint, the polypropylene resin is preferably a resin containing 5% by weight or more of an ethylene propylene copolymer resin, more preferably a resin containing 25% by weight or more. It is preferable that the ethylene propylene copolymer resin contains an ethylene concentration of 1 to 20% by weight. In particular, the ethylene propylene copolymer resin is free from stickiness, is easy to elongate at the time of stretching, has less shedding of fuzz, It is more preferable that the ethylene concentration is 3 to 8%. The polypropylene resin is preferably a resin containing at least 25% by weight of the recycled polypropylene resin from the viewpoint of the environment, more preferably at least 50% by weight of the resin. On the other hand, the same applies to the case where the nonwoven fabric 1 is formed on the basis of the laminated nonwoven fabric of the spunbond layer and the meltblown layer.

From the viewpoints of touch and processing suitability, the area of each heat-sealed portion 3 is preferably 0.05 to 10 mm 2, more preferably 0.1 to 1 mm 2 from the viewpoint of embossing. The number of the thermally fused portions 3 is preferably 10 to 250 / cm2, more preferably 35 to 65 / cm2. The center-to-center distance between adjacent heat-sealed portions 3 in the X direction is preferably 0.5 to 10 mm, more preferably 1 to 3 mm, and the center-to-center distance between the adjacent heat-sealed portions 3 in the Y- To 10 mm, more preferably from 1 to 3 mm.

The thermally fused portion 3 is intermittently formed by thermocompression by embossing (embossing convex roll and flat roll or the like), or by ultrasonic welding, intermittently applying hot air and partially fused. Among them, thermocompression bonding is preferable in that it tends to break the fibers. The shape of the heat-sealed portion 3 is not particularly limited, and may be any shape such as a circle, a rhombus, or a triangle. The ratio of the total area of the heat-welded portions 3 in the surface area of one surface of the nonwoven fabric 1 is preferably 5 to 30%, more preferably 10 to 20% in view of difficulty of forming a napkin.

The nonwoven fabric 1 of the present embodiment is formed on the basis of a spunbonded nonwoven fabric made of long fibers 2 and a part of the long fibers 2 is broken so that only one end 20a is bonded to the heat- And the fibers 20 include the fibers 21 having the free end portions 20b thick. It is preferable that the tip end is thick and the cross-section at the tip end thereof is flat (elliptical or crushed). As a result, a woven fabric with a soft tip is obtained, and a nonwoven fabric having less irritation to the skin is obtained. As shown in Fig. 1, the fibers 20, in which only one end 20a is fixed by the heat-sealed portion 3, are free from the fibers 21 having the free end 20b on the other end side, 20b are not thickened. Here, the "free end" means the "other end" in the fiber 20 where only the one end 20a is fixed by the heat-sealed portion 3, in other words, the "distal end". Whether or not the free end portion 20b is thick can be determined by measuring the fiber diameter by the following measuring method and calculating the increasing ratio of the fiber diameter at the tip.

[Measurement of Fiber Diameter]

First, as shown in Fig. 5 (a), measurement pieces measuring 2 cm in the X direction and 2 cm in the Y direction were cut out from the nonwoven fabric 1 to be measured with a sharp razor under the environment of 22 ° C and 65% RH, , A measurement sample folded outward from a folded line Z extending in the X direction passing through a plurality of thermally fused portions 3 is placed on a test sample Place it on a sample stand made of aluminum for microscope (SEM) and fix it. Next, from the SEM image enlarged by about 750 times, 10 pieces of the fibers 20 fixed only at the one end 20a by the heat-sealed portion 3 are randomly selected, and the vicinity of the tip of the free end of the fibers Take pictures. The diameter 21a of the fiber 20 at the portion excluding the free end 20b of the fiber 20 at a position 120 占 퐉 away from the tip of the free end 20b is calculated from the obtained photograph (see Fig. 2) Respectively. The inclination at the time of measuring the diameter 21a of the fiber 20 at the portion other than the free end 20b is moved in parallel to the free end 20b as it is, (The diameter 21b of the fiber 21 at the free end 20b) of the fiber 21 at the position where the fiber 21 is thickest in the region sandwiched between the distant positions. On the other hand, when the distal end portion is a flat-shaped portion, there is a case where the distal end does not appear thick depending on the observation angle. In this case, however,

The fibers 21 having the free end portions 20b are made of the fibers 20 at the free end portion 20b measured from each of the ten fibers 20 photographs out of the ten fibers 20 randomly picked out from the front. Of the fiber diameter obtained by the following formula (1) is 15% or more from the diameter 21a of the free end 20b and the diameter 21a of the fiber 20 at the portion excluding the free end 20b And it is possible to suppress the cutting of the fibers between the heat-sealed portions 3 (the portion in the form of a fiber excluding the boundary between the heat-sealed portion 3 and the fibers), suppress the decrease of the breaking strength, From the viewpoint of obtaining good tactile feeling, it is preferable to be at least 20%, more preferably at least 25%.

(%) Of the tip fiber diameter = [(21b-21a) / 21a x 100] (1)

In the nonwoven fabric 1, only one end portion 20a of the fibers 20 (the fibers 21 having the thick free end portions 20b) fixed by the heat-sealed portion 3, The ratio of the fiber 21 having the free end portion 20b to 20% or more is preferably 20% or more, more preferably 30% or more, in the free end portion 20b , And particularly preferably 40% or more. The ratio of the fiber 21 having the free end portion 20b increased from the SEM image obtained by enlarging the fibers 10 randomly selected by the fiber diameter measuring method described above by about 750 times, And the ratio of the fibers 21 in which the free end 20b is thick is calculated.

The nonwoven fabric 1 also contains fibers cut at the periphery of the heat-sealed portion 3. The heat-welded portions 3 of the nonwoven fabric 1 are randomly selected so that the outer diameter and the inner diameter of the peripheral portion of the heat-sealed portion 3 10 mm 2) is observed with an electron microscope. In the case where the marks of the cut portion of the fibers (the portion of the embossed portion where the fibers are crushed and crushed, and the portions where the fibers remain unbroken without being crushed and are discontinuous) are counted, It is preferable that the nonwoven fabric is a nonwoven fabric that has been cut at three or more points, more preferably, a nonwoven fabric that has been cut at five to fifteen places.

As shown in Fig. 1, the nonwoven fabric 1 has loop-shaped fibers 23 rising in a loop shape between the heat-sealed portions 3, 3. The standing looped fiber 23 has no free end 20b on the other end side and has a free end 20b on the broken line Z when observed as in Fig. 5 (c) mm < / RTI > In the present embodiment, the loop-shaped fibers 23 are the loop-shaped fibers standing up. The fibers constituting the nonwoven fabric 1 of the present embodiment are formed such that only one end portion 20a made of the fiber 21 having the free end portion 20b thick and the fiber 22 having no thick free end portion 20b The fibers 20 fixed by the heat fusion portion 3 and the loop shaped fibers 23 rising in a loop shape between the heat fusion portions 3 and 3 in addition to the fibers 20 are also provided. The fibers 20 constituting the nonwoven fabric 1 and the fibers 20 constituting the nonwoven fabric 1 are fixed only by the heat-sealed portions 3 from the viewpoint that the nonwoven fabric 1 is not caught on the skin, Shaped fibers 23 in the total number of loop-shaped fibers 23 and loop-shaped fibers 23 is preferably less than 50%, more preferably not more than 45%, and particularly preferably not more than 40%. In the above-mentioned fiber diameter measurement method, the loop-shaped fibers 23 are randomly selected from 10 randomly selected fibers from a SEM image enlarged by about 50 times, and only one end 20a of the loop- The fibers 20 (the fibers 21 having the free end 20b thickened, the fibers 22 having the free end 20b not thickened) and the loop-shaped fibers 23 And the ratio of the fibers 23 (loop-shaped fibers) is calculated from the total number of the fibers 21, the fibers 22 and the fibers 23, and is obtained. On the other hand, the measured values are similarly calculated from 9 points of the SEM images of the other regions and are calculated by their 10-point average. On the other hand, when one loop-shaped fiber 23 is included among 10 randomly selected fibers, the loop-shaped fiber 23 is counted as one.

In the nonwoven fabric (1), since the fibers having a relatively high degree of freedom are included, the gaps between the fibers are filled, and the roughness of the surface is small and smooth. From the viewpoint of tactile improvement, the wider and wider the distribution (dispersion degree) of the fiber diameter is preferable. From the viewpoint of tactile feeling, a satisfactory effect is obtained when the difference is 0.33 or more, and a more satisfactory effect is obtained when the difference is 0.35 or more. The distribution (dispersion degree) of the fiber diameter is not particularly limited, but is preferably 100 or less. More preferably, the fiber diameter distribution (dispersion degree) is 0.35 to 0.9. The distribution (dispersion degree) of the fiber diameters herein means the distribution (dispersion degree) of the fiber diameters of all the fibers constituting the nonwoven fabric 1. Only one end 20a is fixed by the heat-sealed portion 3 The fibers 20, the loop-like fibers 23, and both ends are fixed by the heat-sealed portion 3, and the fibers that are not standing in a loop form (fibers that are not affected by the processing described later) Distribution of the whole. The distribution of the fiber diameter (dispersion degree) is measured by the following method.

Method of measuring fiber diameter [Method of measuring the distribution of fiber diameter (dispersion degree)] [

First, a measuring piece having a size of 2 cm in the X direction and 2 cm in the Y direction was cut with a sharp razor in the nonwoven fabric 1 to be measured under the environment of 22 ° C and 65% RH, and a sample made of aluminum for a scanning electron microscope (SEM) Put it on the stand as it is without folding. Next, ten fibers are randomly extracted from the SEM image enlarged by about 750 times, and the fiber diameters of the non-woven fabric 1 are measured at portions except for the free end 20b (the nonwoven fabric 1 to be measured is the spunbond layer And the laminated nonwoven fabric of the meltblown layer, the fibers of the meltblown layer are uneven and only the fibers of the spunbond layer are selected). Ten fiber diameters were measured as described above in one of the aluminum sample bands and an average value (d _ave ) was determined from ten measured fiber diameters (d ₁ to d ₁₀ ), and the obtained ten fiber diameters d ₁ ~ d ₁₀₎ and the average value (d from _ave), the formula (2) below, obtains the distribution of the fiber diameters of 10 fibers picked at random. The measurement unit is set to be 탆, and measurement is made with a resolution of 0.1 탆. The distribution of the fiber diameters of the ten fibers was measured to prepare six samples of the aluminum sample band for one nonwoven fabric 1 and the average value of the fiber diameter distributions of the ten fibers obtained at each spot (the following formula (3) (Hereinafter referred to as " nonwoven fabric 1 "). On the other hand, the VARPA function of the excel2003 table calculation software of Microsoft is used for calculating the fiber diameter distribution of 10 fibers.

The fiber diameter distribution of 10 fibers = [(d ₁ -d _ave ) ² + (d ₂ -d _ave ) ² + ... (d ₁₀ -d _ave ) ² )] / 10 ... (2)

The fiber diameter distribution (dispersion degree) in the nonwoven fabric 1 = (the sum of the fiber diameter distributions of the ten fibers obtained in the above formula (2)) / 6 (3)

The nonwoven fabric 1 preferably has 8 fibers / cm or more, more preferably 12 fibers / cm or more, from the standpoint of improving the feeling of touch. From the viewpoint of obtaining a sufficient breaking strength, the upper limit is preferably not more than 100 / cm, more preferably not more than 40 / cm from the viewpoint of appearance of nappy. The brushed fibers are measured by the following measuring method.

[Measuring method of brushed fibers]

6 is a schematic diagram showing a method of measuring the number of fibers brushed in the fibers constituting the nonwoven fabric 1 under an environment of 22 ° C and 65% RH. First, a measuring piece of 20 cm x 20 cm is cut out from a nonwoven fabric to be measured with a sharp razor blade, and the measuring sample 104 is folded out from the worn surface of the measuring piece as shown in Fig. 6 (a). Next, as shown in Fig. 6 (b), the measurement sample 104 is laid on a blackboard of A4 size, and a hole 107 of 1 cm length x 1 cm width is laid thereon. Put the black ground. At this time, as shown in Fig. 6 (b), the folding line 105 of the measurement sample 104 is arranged so as to be seen from the hole 107 in the upper black ground. "Kenan (black) ream weight 265 g" of Fuji Kyowa and Seishi Kabushiki Kaisha was used for both sites. Thereafter, a weight of 50 g is placed on each of the both sides of the upper ground hole 107 at a position 5 cm away from the outer side along the folding line 105 to make the measurement sample 104 completely folded. Next, as shown in Fig. 6 (c), the hole 107 of the ground is observed at a magnification of 30 times using a microscope (VHX-900 manufactured by KEYENCE Co., Ltd.) The number of brushed fibers per 1 cm brushed upward above the imaginary line 108 formed at a position shifted upward by 0.2 mm is measured. And the average value (rounding off the prime number) is used as the brushed fiber.

When the number of worn-out fibers is counted, a fiber that crosses the imaginary line 108, which is 0.2 mm above the folding line 105 twice, as in the case of the fiber 106a shown in Fig. 6 (c) If present, the fibers count as two. Specifically, in the example shown in Fig. 6 (c), there are four fibers crossing the imaginary line 108 once, and one fiber 106a crossing the imaginary line 108 twice. The number of fibers 106a crossed is counted as two, and the number of woven fibers is six.

The nonwoven fabric 1 is preferably made such that the average fiber diameter of the brushed fibers (fibers crossing the imaginary line 108) is greater than the average fiber diameter of the surface fibers (the imaginary line 108) And the fibers not reaching the imaginary line 108) are preferably smaller than the average fiber diameter of the fibers. The average fiber diameter refers to a fiber diameter measured by a microscope (optical microscope, SEM or the like) of the fiber diameter of twelve portions of each of the brushed and unbrushed fibers. The fiber diameter of the brushed fiber is preferably from 97% to 40%, more preferably from 90% to 40%, of the non-brushed fiber, since it is excellent in touch.

In addition, the nonwoven fabric 1 is preferably a nonwoven fabric having a height of 1.5 mm or less, more preferably 0.8 mm or less, from the viewpoint that it is difficult for the napkin 1 to become a napkin, From the above viewpoint, the lower the lower the better, but the greater the upper limit of 0.2 mm, the satisfactory tactile sensation can be obtained. In addition to the above, in order to be compatible with the breaking strength, it is more preferable that the height of the brushed fiber is 1.5 mm or less, and the brushed fibers are 8 / cm or more. Further, it is preferable that the height of the worn-out fiber is 0.5 mm or less, and the worn-out fiber is 15 / cm or more because it is hard to stick to the skin and the feeling is preferable. Here, unlike the length of the fiber, the height of the fiber means the height of the fiber in the natural state without pulling it when the fiber is measured. When the length of the brushed fiber is large or when the rigidity of the fiber is high, the height of the brushed fiber tends to increase. The height of the brushed fiber is measured by the following measurement method.

The height of the brushed fiber is measured simultaneously when the number of brushed fibers is measured. Specifically, as shown in Fig. 6 (c), the inside of the hole 107 is observed, and a line parallel to the folding line 105 is drawn to the point where the brushed fibers do not intersect every 0.05 mm. Next, a parallel line in which fibers intersecting parallel lines are halved, as compared with the number of brushed fibers measured as described above (judged from imaginary line 108 above 0.2 mm), and folds The distance to the line is the brushed height. The nonwoven fabric for measuring the above operation is measured for three minutes, and an average of nine points in total at three points and three points for one sheet is taken as the height of the brushed fibers.

It is preferable that the bulk softness of the nonwoven fabric 1 is 8.0 cN or less in addition to the height of the worn-out fiber and the worn-out fiber, because it is flexible and excellent in touch. It is also preferable that the content is 0.5 to 3.0 cN because it softens like infant liners and infant clothes. Bulk flexibility is measured by the following method.

[Method of measuring bulk flexibility]

The bulk flexibility of the nonwoven fabric 1 was measured by cutting the end portion of the nonwoven fabric 1 at 150 mm in the MD direction and 30 mm in the CD direction under the environment of 22 ° C and 65% RH in a ring shape with a diameter of 45 mm do. At this time, the stem of the stapler is made longer in the MD direction. The ring was placed in the form of a cylinder on a sample table using a tensile tester (e.g., Tensilon tensile tester "RTA-100" manufactured by Orientec Co., Ltd.), and a flat plate substantially parallel to the table To measure the maximum load at the time of compression to obtain the bulk flexibility in the CD direction. Next, the ring is manufactured by changing the MD direction and the CD direction, and similarly, the bulk flexibility in the MD direction is measured. The rings are fabricated and measured in the MD direction and the CD direction, respectively, and average values in the CD direction and the MD direction are taken as the bulk flexibility of the nonwoven fabric 1.

If the original spunbonded nonwoven fabric forming the nonwoven fabric 1 is impregnated with a softening agent or applied, the effect of the present invention is more effective. As the softening agent, for example, a wax emulsion, a reactive softening agent, a silicone system, a surfactant and the like can be used. Particularly, it is preferable to use an amino group-containing silicone, an oxyalkylene group-containing silicone, or a surfactant. Examples of the surfactant include anionic surfactants such as an anionic surfactant based on a carboxylate salt, an anionic surfactant based on a sulfonic acid salt, an anionic surfactant based on a sulfate ester salt, and an anionic surfactant based on a phosphate ester salt (particularly, alkylphosphate ester salts); Polyhydric alcohol mono fatty acid esters such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate and propylene glycol monostearate, N- (3-ole 2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbit beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene glyceryl mono Nonionic surfactants such as oleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, and polyoxyethylene lauryl ether; quaternary ammonium salts, amines Cationic surfactants such as salts or amines; Amphoteric surfactants such as aliphatic derivatives of secondary or tertiary amines containing carboxy, sulfonate and sulfate or aliphatic derivatives of heterocyclic secondary or tertiary amines can be used. If necessary, known medicaments may be added to the softening agent of the present invention as a secondary additive (small amount).

By including the softening agent, the skin feel is good, the hair loss is small, the skin friction on the surface is low, and the breaking strength is high, so that the effect is particularly high in the present invention.

The softening agent is preferably used in combination with the random copolymer described in the paragraph to further increase its effect, and it is possible to reduce smoothness caused by the random copolymer in the brushed fiber due to the softening agent, It is particularly preferable in that a fresh touch is obtained.

The nonwoven fabric 1 is formed on the basis of a laminated nonwoven fabric of a spunbond layer and a meltblown layer to be described later, and the spunbond layer of the laminated nonwoven fabric is composed of a plurality of spunbond-meltblown- When the spunbond laminated nonwoven fabric, the spunbond-spunbond-meltblown-spunbond laminated nonwoven fabric or the like is used, it is preferable that the softener be overlaid on only one of the spunbond layers and may be overlaid on all of the spunbond layers . When a softener is mixed in a spunbond layer of one layer, it is preferable that the layer is provided with a fiber having a free end portion by performing a processing described later on the layer side so as to provide good tactile feel and high breaking strength. As described above, the nonwoven fabric 1 is formed on the basis of the laminated nonwoven fabric of the spunbond layer and the meltblown layer, as compared with the case where the nonwoven fabric 1 is formed based on a single spunbonded nonwoven fabric .

Next, a preferred production method of the nonwoven fabric 1 of the present invention will be described with reference to Figs. 3 and 4. Fig. The manufacturing apparatus preferably used in the method of manufacturing the nonwoven fabric 1 is roughly classified into a pre-processing section 4 and a brushed processing section 5 disposed downstream of the pre-processing section 4. [

3, the pre-processed portion 4 includes a convex portion 410 to be engaged with each other, and a steel-matched embossing roller (steel) 41 comprising a pair of rolls 41 and 42 provided on the circumferential surface of the concave portion 420 matching embossing roller (43). 3, the steel matching embossing roller 43 has a plurality of convex portions 410 provided on the circumferential surface of the roll 41 and a plurality of concave portions 420 provided on the circumferential surface of the roll 42, And the plurality of convex portions 410 are uniformly and regularly arranged in the rotational axis direction and the circumferential direction of the roll 41, respectively. The pair of rolls 41 and 42 are engaged and rotated as the driving force is transmitted from the driving means (not shown) to either one of the rotating shafts. 3, the pre-processing section 4 is provided with conveying rolls 44 and 45 for conveying the raw material nonwoven fabric 10 on the upstream side and the downstream side of the steel matching embossing roller 43 .

Each convex portion 410 of the roll 41 preferably has a height from the circumferential surface of the roll 41 to the apex of the convex portion 410 of 1 to 10 mm and more preferably 2 to 7 mm. The distance (pitch) between adjacent convex portions 410 in the direction of the rotational axis is preferably 0.01 to 20 mm, more preferably 1 to 10 mm, and the distance (pitch) between neighboring convex portions 410 in the circumferential direction, Is preferably 0.01 to 20 mm, more preferably 1 to 10 mm. The shape of the top surface of each convex portion 410 of the roll 41 is not particularly limited and may be circular, polygonal, elliptical, or the like, and the area of the top surface of each convex portion 410 may be 0.01 To 500 mm < 2 >, and more preferably 0.1 to 10 mm < 2 >. Each recess 420 of the roll 42 is disposed at a position corresponding to each convex portion 410 of the roll 41. The engaging depth of each convex portion 410 of the roll 41 and the concave portion 420 of the roll 42 (the length of the portion where each convex portion 410 and each concave portion 420 overlap) More preferably 1 to 5 mm, and still more preferably 1 to 5 mm.

4, the brushed portion 5 is provided with a convex roll 51 provided with a convex portion 510 on the circumferential surface thereof and is provided on the upstream side and the downstream side of the convex roll 51 with a raw material nonwoven fabric 10 ') For transporting the recording medium. The convex roll 51 rotates as the driving force is transmitted from the driving means (not shown) to the rotational shaft.

Each convex portion 510 of the convex roll 51 preferably has a height from the circumferential surface of the convex portion 51 to the apex of the convex portion 510 is preferably 0.001 to 3 mm and more preferably 0.001 to 0.1 mm . (Pitch) between adjacent convex portions 510 in the direction of the axis of rotation is preferably 0.1 to 50 mm, more preferably 0.1 to 3 mm, and the distance (pitch) between neighboring convex portions 510 in the circumferential direction, Is preferably 0.1 to 50 mm, more preferably 0.1 to 3 mm. The shape of the top surface of each convex portion 510 of the convex roller 51 is not particularly limited and may be circular, polygonal, elliptical, or the like, and the area of the top surface of each convex portion 510 may be More preferably from 0.001 to 20 mm < 2 >, and even more preferably from 0.01 to 1 mm < 2 >.

In the manufacturing apparatus including the pre-processing unit 4 and the brushed processing unit 5 having such a constitution, the spun bond nonwoven fabric (raw material nonwoven fabric 10), for example, a strip-shaped raw material of the nonwoven fabric 1, (Not shown), and the raw material nonwoven fabric 10 is conveyed between the pair of rolls 41, 42 of the steel matching embossing roller 43 by the conveying rolls 44, 45. As shown in Fig. 3, in the pre-processing section 4, the raw material nonwoven fabric 10 is pressed between a pair of rolls 41 and 42 to damage the raw material nonwoven fabric 10. The pair of rolls 41 and 42 of the steel matched embossing roller 43 are not heated positively or the raw material nonwoven fabric (not shown in the drawing) does not actively heat from the viewpoint of causing no thermal fusion between constituent fibers of the spunbonded non- It is preferable to perform the steel-matched embossing process at a temperature lower than the melting point of the component showing the lowest melting point among the components of the fibers constituting the steel sheet 10, particularly at a temperature of 70 deg. C or lower at the melting point.

Next, the damaged raw material nonwoven fabric 10 'is conveyed by the conveying rolls 52 and 53 to the convex roll 51 provided with the convex portions 510 on the circumferential surface. The surface of the raw material nonwoven fabric 10 'that has undergone damage is processed into a convex roll 51 and a part of the long fibers 2 constituting the spunbonded nonwoven fabric is broken to form the one end portion 20a, Only the nonwoven fabric 1 having the fibers 20 fixed by the heat-sealed portion 3 of the spunbonded nonwoven fabric is formed (see Fig. 1). The rotating direction of the convex roll 51 is set to be opposite to the direction in which the raw material nonwoven fabric 10 'is conveyed in the direction opposite to the carrying direction of the raw material nonwoven fabric 10' from the viewpoint of breaking a part of the long fibers 2 and efficiently forming the fibers 20 shown in Fig. , And it is preferable to rotate the convex roll 51 at a speed of 0.3 to 10 times the conveying speed of the raw material nonwoven fabric 10 '. When rotating in the circumferential direction (forward direction with respect to the transport direction), it is preferable to rotate the convex roll 51 at a speed of 1.5 to 20 times. Here, the speed of the convex roll 51 means the circumferential speed at the circumferential surface of the convex roll 51. [

The position of the conveying roll 53 relative to the convex roll 51 as shown in Fig. 4 is preferable from the viewpoint of more efficiently breaking a part of the long fibers 2 to more efficiently form the fibers 20 shown in Fig. It is preferable that the damaged raw material nonwoven fabric 10 'is brought into contact with the contact face of the convex roll 51 at a wrap angle alpha of 10 to 180 degrees, It is more preferable that the contact with the envelope angle? Is suppressed because the width of the nonwoven fabric is reduced by the neck in.

On the other hand, in the case where the fibers 20 whose one end portion 20a is fixed by the heat-sealed portion 3 are formed on both surfaces of the nonwoven fabric 1, the raw material nonwoven fabric 10 ' (Another surface) different from the surface of the other convex roll 51 by the other convex roll 51.

The present inventors have found that the reason why the fibers 20 are formed is that the spunbonded nonwoven fabric (raw nonwoven fabric 10) is stretched by the steel matching embossing roller 43 and the heat of the spunbonded nonwoven fabric (raw nonwoven fabric 10) The weakening point is formed in the fused portion 3 and then the long fiber 2 is broken at the weakening point of the pole surface of the heat fused portion 3 of the nonwoven fabric by the convex roll 51, ) Are formed in the fiber-reinforced composite material. The present inventors assume that the fibers cut from the heat-sealed portion 3 are the fibers 21 having the free end portions 20b thick. The inventor of the present invention has found out that the long fibers 2 are peeled off at the weakening point of the heat fusion portion 3 and the fibers peeled from the heat fusion portion 3 are peeled off from the heat fusion portions 3, Shaped fibers 23 standing up in a loop shape between the fibers 3 and 3. The present inventors have also found that when the surface is processed with the convex roll 51, the long fibers 2 are broken between the heat-sealed portions 3 and 3, and the free ends 20b are not twisted with the fibers 22, Is formed. The nonwoven fabric manufactured by the above-described preferred manufacturing method of the nonwoven fabric 1 of the present invention has a smaller ratio of the loop-shaped fibers 23 and the non-thickened fibers 22 than the nonwoven fabric produced by the conventional brassiere method . If there are a lot of unfolded fibers 22 such as a nonwoven fabric manufactured by the conventional brassiere method, it is broken between the embossed portion 3 and the embossed portion, Called cracks (cracks, holes) are created in the surface. As a result, the base fiber which is not brushed can be brushed without scratching, and a high breaking strength can be obtained. On the other hand, if the bristles are to be brushed with no weakening point formed, the fibers will not be brushed unless the surface of the nonwoven fabric is rubbed with a stronger force, and the base fibers other than the brushed nonwoven fabric will be scratched when brushed. Is likely to be broken, so that it is difficult to maintain the strength. On the other hand, the nonwoven fabric produced by the above-described preferred manufacturing method of the nonwoven fabric 1 of the present invention can maintain the breaking strength because the proportion of the fibers 22 that are not thick is small. In addition, when such a nonwoven fabric is used as an outer covering material of a disposable diaper or the like such as a pants-type disposable diaper, it is difficult to be ruptured with fingers or the like when pulling up the diaper to wear it, which makes it difficult to tear (high piercing strength). In addition, when the diaper is used in the side seats of the pull-on type disposable diaper, the side seals are torn off when the diaper is taken off. At this time, the nonwoven fabric is hardly torn in the transverse direction of the diaper, and more easily torn. Further, if the bristles are brushed without forming weakening points, the fibers are peeled off from the thermally fused portions, the number of the bristle fibers decreases, and the bristle height tends to increase. For this reason, problems such as easy formation of fluffs tend to occur.

The fibers between the heat-sealed portion 3 and the heat-sealed portion 3 are stretched by the steel-matched embossing roller 43 and weakening points are likely to be formed in the periphery of the heat-sealed portion 3. The adjustment of the weakening point is adjusted according to the amount of engagement of the upper and lower pairs of rolls 41 and 42 of the steel matching embossing roller 43. The weakening point is likely to be formed in a short fiber length between the joining portion and the joining portion with respect to the stretching direction. Since the weakened portion is formed and the fiber is easily cut at the weakening point during bricking by the brick processing portion 5, the short bristle fiber is obtained and the soft feel is excellent, and the lint is conspicuous even in appearance It is preferable that a roughened nonwoven fabric which is difficult to form a nap roll and has a high breaking strength is obtained. At the same time, the fibers between the heat-welded portion 3 and the heat-sealed portion 3 are stretched to make the fibers thin, and the heat-sealed portion 3 becomes soft. Especially, the fibers are stretched by the steel matching embossing roller 43 to be elongated and elongated, whereby the distance between the fibers is increased and the air permeability is improved. In addition, since the bulk density of the fibers on the brushed surface is lowered by brick processing by the brick processing section 5, the air permeability of the brick-made nonwoven fabric is improved even if the same basic weight is used. As described above, by combining the stretching of the fibers and the brushed treatment, the air permeability is improved to 1.2 to 2.0 times, more preferably 1.3 to 1.8 times as compared with the original nonwoven fabric. The air permeability is measured as a reciprocal by measuring the ventilation resistance with the AUTOMATIC AIR-PERMEABILITY TESTER KES-F8-AP1 manufactured by KATO TECH. The air permeability of the obtained nonwoven fabric is preferably 24 m / (kPa · s) or more. The spunbonded nonwoven fabric of the raw material nonwoven fabric 10 having both good feel and air permeability is a nonwoven fabric composed of a laminate of only a spunbond layer not containing a meltblown layer (for example, spunbond-spunbond-spunbond) .

The effects of the above-described nonwoven fabric 1 of the embodiment of the present invention will be described.

1, the nonwoven fabric 1 of the present embodiment is formed with fibers 20 in which a part of the long fibers 2 is broken and only one end portion 20a is fixed by the heat fusion portion 3 is formed . Since the fibers 20 are formed, the entire nonwoven fabric 1 can be fluffy. In addition, since the nonwoven fabric is not broken only in a part of the long fibers 2, the breaking strength can be maintained as high as that of the original spunbonded nonwoven fabric. In addition, the fibers 20 of the nonwoven fabric 1 of the present embodiment include fibers 21 having a free end portion 20b as shown in Fig. Since the free end 20b includes the thick fibers 21, the free end 20b is not prickly and hard to catch on the skin, so that the feel is good. In addition, the fibers 21 having the free end 20b of a larger thickness tend to stretch on the side of the free end 20b and are smooth, so that the feel is good.

The spunbonded nonwoven fabric or the spunbonded nonwoven fabric has a less soft feeling than conventional nonwoven fabrics, and is less tactile than the nonwoven fabric of the air through method. According to the nonwoven fabric 1 of the present embodiment described above, softness is added to the smoothness of a laminated nonwoven fabric of a spunbond layer and a meltblown layer, such as Japanese paper, and the feeling can be greatly improved.

The use range of the nonwoven fabric 1 is suitably used for constituent members of absorbent articles such as disposable diapers and sanitary napkins. Examples of the constituent members include a topsheet, a backsheet, and a sheet constituting an external body. The use range of the nonwoven fabric 1 is also preferably used for other cleaning sheets. Hereinafter, the disposable diaper using the nonwoven fabric 1 will be specifically described as an example.

7, the pull-on type disposable diaper 100 includes an absorbent main body 50 including the absorbent body 40 and a non-absorbent main body 50 located on the non-skin- And an outer covering member 60 which fixes the outer covering member 60.

8, the absorbent main body 50 includes a liquid-pervious topsheet 70, a liquid-impermeable backsheet 80 (including water-repellent), and a liquid-pervious topsheet 70 interposed between the both sheets 70, (40) and is substantially longitudinally long.

The outer covering material 60 has a back side portion A disposed on the back side of the wearer, a back side portion B disposed on the rear side, and a crotch portion C disposed between the back side portion B and the crotch portion, A pair of side seal portions (not shown), a pair of leg openings (not shown), and a waist opening portion (not shown) are joined to each other by the side edge portions 6a, 6b of the back side B, . The outer covering material 60 has an outer layer sheet 62 forming the outer surface of the diaper and an inner layer sheet 61 located on the skin contact surface side and partially bonded to the outer layer sheet 62, The gathers for waist elastic members 63 and the leg elastic members 64 are disposed between the waist portions forming the openings and the both sheets 61 and 62 of the leg portions 6d.

7, the absorbent main body 50 is disposed from the back side portion A to the back side portion B of the outer covering material 60, and both end portions in the longitudinal direction of the absorbent main body 50 are covered with the outer covering material And is retracted inward in the longitudinal direction from both end portions in the longitudinal direction of the main body 60. 8, the non-skin contact surface of the backsheet 80 of the absorbent main body 50 is joined to the inner sheet 61 of the covering material 60 by an adhesive, a heat seal, an ultrasonic seal, Of the present invention.

As shown in Fig. 8, side cuffs 55, 55 made of a liquid-impermeable or water-repellent and breathable material are provided on both sides in the longitudinal direction of the absorbent main body 50. An elastic member 56 for forming a side cuff is arranged and fixed in a stretched state in the vicinity of the free end of each side cuff 55. The side cuffs 55 stand on the free end side when the diaper is attached, and can prevent the excretion of the absorbent main body 50 from flowing out in the width direction. 8, a predetermined width portion 55a on the outer side in the width direction of the absorbent main body 50 is curved on the non-skin contact side of the absorbent body 40, (40) and the backsheet (80). On the other hand, the predetermined width portion 55a may be fixed between the backsheet 80 and the outer covering material 60. [

The nonwoven fabric according to the present invention is preferably used as the outer-layer sheet (62). The roughened nonwoven fabric according to the present invention may also be used as the topsheet 70, the backsheet 80, the sheet for forming the side cuffs 55, and the inner layer sheet 61. As the members of the respective parts when the nonwoven fabric according to the present invention is not used, those commonly used in absorbent articles such as disposable diapers can be used without any particular limitation. For example, the topsheet 70 may be a liquid-permeable nonwoven fabric, a porous film, a laminate thereof, or the like. As the backsheet 80, a resin film, a laminate of a resin film and a nonwoven fabric, or the like may be used. As the sheet for forming the side cuffs 55, a stretchable film, a nonwoven fabric, a fabric or a laminated sheet of them can be used. As the inner layer sheet 61 and the outer layer sheet 62, a water repellent nonwoven fabric or the like can be used.

As the absorber 40, those conventionally used for absorbent articles such as disposable diapers and the like can be used without any particular limitation. For example, as the absorber 40, a fibrous aggregate of a fibrous material such as pulp or a fibrous aggregate of fibrous material such as pulp, or a fibrous aggregate of a fibrous material such as pulp or the like, or a fibrous aggregate of fibrous material such as pulp on which a superabsorbent polymer is carried thereon is wrapped with a covering material such as tissue paper or a permeable nonwoven fabric.

As the elastic members 56 for forming the side cuffs, the waist elastic members 63 and the leg elastic members 64, those commonly used for absorbent articles such as disposable diapers can be used without any particular limitation. For example, an elastic material composed of a natural rubber, a polyurethane, a polystyrene-polyisoprene copolymer, a polystyrene-polybutadiene copolymer, and a polyethylene-? Olefin copolymer such as ethyl acrylate-ethylene.

The nonwoven fabric of the present invention is not limited to the above-described nonwoven fabric 1 of the present embodiment, and can be appropriately changed.

For example, as shown in Fig. 2, the nonwoven fabric 1 of the present embodiment described above is formed on the basis of a spunbonded nonwoven fabric, but may be formed based on a laminated nonwoven fabric of a spunbond layer and a meltblown layer. In the case of a laminated nonwoven fabric, it is preferable that the spunbond layer is a nonwoven fabric disposed on the surface and / or the back surface of the meltblown layer. In particular, the laminated nonwoven fabric of the spunbond layer and the meltblown layer preferably has an ethylene propylene copolymer resin as a random copolymer in an amount of 25% by weight or more And a homopolymer polypropylene resin is preferably used for the meltblown layer. Further, it is preferable that the resin including the random copolymer forms the spunbond layer of the outermost layer because the soft layer is disposed on the outer side, so that the bending stiffness is lowered and becomes flexible. It is preferable that a laminated nonwoven fabric in which only the spunbond layer on the surface touching the skin is formed of a resin containing the random copolymer in terms of price and cost performance is a surface having a good tactile feel (a layer containing a random copolymer ) And the surface giving the breaking strength can be shared, and the touch can be efficiently improved. Likewise, it is preferable from the viewpoint of not burdening the environment that it is made of a fiber made of a polypropylene resin containing at least 25% by weight of a recycled polypropylene resin in place of the random copolymer.

The original nonwoven fabric forming the nonwoven fabric 1 may be a nonwoven fabric (e.g., a spunbonded nonwoven fabric), a laminated nonwoven fabric such as a nonwoven fabric obtained by laminating a spunbond layer and a meltblown layer by heat embossing, Staple fibers of 30 mm or more are heat-pressed with a heat roll or the like, or those obtained by embossing after air-through heat treatment. The fibers constituting the nonwoven fabric may be staple fibers, conjugated fibers (side by side, core strands, eccentric fibers), crimped fibers, heat shrinkable fibers, thermally stretched fibers, or fibers that are split by stretching. Short fibers are particularly preferred because of their low cost. The nonwoven fabric may be a composite nonwoven fabric obtained by bonding another nonwoven fabric or film to the nonwoven fabric by an adhesive or heat. In this case, the brick processing may be performed before or after bonding the other nonwoven fabric or the film.

Since the direction of rotation of the convex roll 51 is made in the direction of flow (MD direction) of the nonwoven fabric during bricking by the brushed fabric 5, the orientation degree (MD / CD) of the fibers is 1.1 to 1.8, Is 1.2 to 1.5, it is preferable that the fibers are easily caught by the convex portions 510 of the convex rolls 51, so that it is easy to obtain a wedge amount. The degree of orientation of the fiber was measured as a MOR value by a microwave molecular alignment system MOA-6004 (manufactured by Oji Scientific Instruments), cutting the sample into a square of 95 mm in the MD direction and 95 mm in the CD direction. The degree of orientation of the fibers is an average value of 5 samples.

Unlike the flocked sheet as shown in Patent Document 3 which is the prior art, the nonwoven fabric manufactured using the above-described manufacturing apparatus has no operation for adhering new fibers to the nonwoven fabric by using an adhesive or the like. Therefore, So that the risk of adverse effects on the skin can be reduced. In addition, unlike flocking, there is no problem such as flaking of flocking fiber and exposure of adhesive surface during use. For example, the spunbonded nonwoven fabric which is one of the nonwoven fabrics used in the absorbent article is thin, and tearing is apt to occur in general brasswork. However, according to the above-described method of producing a nonwoven fabric using the production apparatus, A woven (spunbond) nonwoven fabric is obtained.

Next, a method for producing a nonwoven fabric of the present invention will be described with reference to the drawings based on its preferred embodiments.

On the other hand, as for the nonwoven fabric, the direction along the fiber orientation direction is generally described as the MD direction or the longitudinal direction and the direction orthogonal to the fiber direction as the CD direction or the width direction, as viewed along the orientation direction of the constituent fibers. In the following description, the direction in which the nonwoven fabric in the MD direction (longitudinal direction) is conveyed and the direction in which the sheet is conveyed by rotating the roll in the circumferential direction means the same direction, and the CD direction (width direction) Means the same direction.

Figs. 9 to 12 schematically show one embodiment of a processing apparatus used in the nonwoven fabric manufacturing method of the present invention (hereinafter, simply referred to as a processing apparatus).

As shown in Fig. 9, the machining apparatus 1 of the present embodiment is roughly divided into a partial stretch machining section 2 and a brushed machining section 3 disposed downstream of the partial stretch machining section 2. As shown in Fig.

The partial stretching part 2 is a part for performing partial stretching on each of a plurality of portions of the nonwoven fabric 4. In the working device 1 of the present embodiment, as shown in Figs. 9 and 10, (21, 22). The "partial stretching" process as used herein refers to a method of processing the nonwoven fabric so as to have an unstretched portion and a stretched portion, instead of performing the stretching process on the entire nonwoven fabric by the speed difference between rolls. The unstretched portion is a portion of the nonwoven fabric that is not subjected to the stretching treatment, and "not subjected to the stretching treatment" means that the stretching treatment is not actively conducted in processing.

The pair of uneven rolls 21 and 22 has a plurality of convex portions 210 on the circumferential surface of one of the rolls 21 and the other of the convex portions 210 of the one roll 21 on the circumferential surface 210 having a concave portion 220 in which the convex portion 210 is inserted. The pair of concave-convex rolls 21 and 22 are metallic cylinders such as aluminum alloy or steel. The machining apparatus 1 of the present embodiment is provided with a so-called steel matching embossing roller 23 comprising a convex portion 210 to be engaged with each other and a pair of concave-convex rolls 21 and 22 provided on the circumferential surface of the concave portion 220 Respectively. 11, the steel-matched embossing roller 23 has a plurality of convex portions 210 provided on the circumferential surface of the roll 21 and a plurality of concave portions 220 provided on the circumferential surface of the roll 22, And the plurality of convex portions 210 are uniformly and regularly arranged in the rotational axis direction and the circumferential direction of the rolls 21, respectively. The pair of rolls 21 and 22 are rotated by transmitting a driving force from a driving means (not shown) using a gear (not shown). On the other hand, the pair of rolls 21 and 22 may be rotated by engagement by driving force from a driving means (not shown) to either one of the rotation shafts. However, It is preferable to transmit the driving force using a gear separately from the engagement. The rotational speed (main speed V2) of the pair of rolls 21 and 22 is controlled by a control unit (not shown) provided in the machining apparatus 1. Here, the main speed V2 of the rolls 21, 22 is obtained as the speed of the circumference from the number of revolutions of the roll, with the diameter (the tooth tip outer diameter-engagement depth D of the roll 21) as the diameter.

The shape of the convex portion 210 on the circumferential surface of the roll 21 may be circular, rectangular, elliptical, rhombic, rectangular (long in the carrying direction or in the direction perpendicular to the carrying direction) The circular shape is preferable in that the strength is not lowered. In addition, trapezoidal, quadrangular, and curved shapes can be used as the shape of the convex portion 210 when viewed from the side. A trapezoidal shape is preferable in view of abrasion during rotation of the roll, ; bottom angle) of 70 to 89 degrees.

The partial stretch processing section 2 shows the effect of improving flexibility such as high flexibility in the nonwoven fabric 4 before processing and the plurality of portions of the nonwoven fabric 4 are wound around the machine It is preferable to perform drawing at a draw magnification ratio of 1.05 to 20, more preferably to draw at 2 to 10 times. The mechanical stretching magnification herein means a value obtained by the shape of engagement of the convex portion 210 of the roll 21 and the concave portion 220 of the roll 22, which is subjected to the stretching treatment to the nonwoven fabric 4. [ As shown in Fig. 11, the respective mechanical stretching ratios of the rollers 21 are set such that the distance (pitch P ₁ ) between the adjacent convex portions 210 in the circumferential direction of the roll 21, (Pitch P ₂ ) between the protrusions 210 of the roll 21 and the depth D of engagement of the protrusions 210 of the roll 21 with the protrusions of the roll 22, (Dot diameter A ₁ ) in the circumferential direction of the apex 210 of the roll 21 and the length in the direction of the axis of rotation of the apex of the convex portion in the roll 21 (dot diameter A ₂ ) ]. When the shape of the convex portion 210 of the roll 21 is different from the shape of the convex portion of the roll 22, the dot diameter A ₁ is set as an average value of the circumferential lengths of the apexes of the rolls 21 and 22 Is obtained. The dot diameter A ₂ is also obtained as an average value of the lengths of the vertexes of the rolls 21 and 22 in the direction of the axis of rotation. Also, when the shape of the upper surface of the dot is a circle, an ellipse, and a polygon in addition to the rectangle, the same is also obtained. The mechanical stretching magnification at this time is set to the stretching magnification of the portion having the highest stretching magnification (the convex portion 210 of the roll 21 and the convex portion of the roll 22 closest to each other). This is defined as the mechanical stretching magnification. However, the mechanical stretching magnification is obtained not only in a roll shape but also in a flat plate type, a caterpillar type, etc. described in Japanese Patent Application Laid-Open No. 2007-22066, for example.

Mechanical stretching magnification in the circumferential direction

Mechanical stretching magnification in the rotational axis direction

On the other hand, the obtained mechanical stretching magnification of either the circumferential direction or the rotational axis direction may satisfy the mechanical stretching magnification in the above range.

The pair of uneven rolls of the partially drawn portion 2 has a mechanical stretching magnification within the above range so as to reduce the breaking strength of the nonwoven fabric obtained after the processing, It is preferable to subject the 80% portion to the partial stretching process, and more preferably the 40% to 80% portion to perform the partial stretching process. A plurality of portions of the nonwoven fabric 4 to be subjected to the partial stretching process are obtained by engaging the convex portions 210 of the rolls 21 and the concave portions 220 of the rolls 22 as shown in Fig. The edge 210a of each convex portion 210 of the roll 21 and the edge 220a of the roll 22 which starts to lose in each concave portion 220 And the stretched portion. The portion of the nonwoven fabric contacting the convex surface (top surface) of each convex portion is hardly actively subjected to the stretching action. The portion subjected to the partial stretching process with respect to the total area of the nonwoven fabric 4 means that the total area of the supplied nonwoven fabric 4 is the total sum of the areas of the top surfaces of the convex portions 210 of the rolls 21 Means a portion except for the total area excluding the area and the total area of the bottom surface between adjacent convex portions 210 in the roll 21. As an effective stretching effect applied to the nonwoven fabric, the total stretching magnification of the nonwoven fabric is determined by multiplying the value obtained by multiplying the area ratio of the stretched portion by the stretching magnification of the nonwoven fabric wound around the stretched portion, the unstretched portion (including the portion that is not substantially stretched) And the area ratio of the non-drawn area is added. The stretching ratio of the nonwoven fabric to the stretched portion is divided into a nonwoven stretching ratio in the circumferential direction (MD direction) and a nonwoven stretching ratio in the rotation axis direction (CD direction). That is, it is obtained by the following equation (1).

Total drawing ratio of the nonwoven fabric = {drawing ratio of the nonwoven fabric in the circumferential direction (MD direction) x drawing area ratio of the nonwoven fabric in the MD direction} + {drawing ratio of the nonwoven fabric in the rotation axis direction (CD direction) Stretching ratio of the nonwoven fabric to the stretch ratio of the nonwoven fabric (including the portion which is not substantially stretched (1 times)) (One)

Since the nonwoven fabric stretching magnification in the circumferential direction (MD direction) differs depending on the feeding speed ratio of the nonwoven fabric, the mechanical stretching magnification in the circumferential direction is changed by changing the feeding speed and the speed of the roll 21 (or the roll 22) (Roll peripheral velocity / feed velocity). Since the width of the nonwoven fabric in the direction of the rotation axis (CD direction) becomes wrinkles, the width of the nonwoven fabric before and after the roll 21 and the roll 22 is changed to the mechanical stretching magnification in the direction of the rotation axis (Non-woven fabric width after roll passing / non-woven fabric width before roll passing). When both the MD direction and the CD direction are subjected to the elongation (when the nonwoven fabric is elongated in an oblique direction), the mechanical stretching magnification is taken as a vector, and the sum is obtained as a combined sum of the MD direction and the CD direction. And when the shape of the convex portion is a circular shape or the like when viewed from the top, it is obtained as an integral value of the mechanical drawing magnification at each point. If the total stretching ratio of the nonwoven fabric is in the following range, the partial stretching causes the fibers between the thermocompression bonding portion and the thermocompression bonding portion of the original nonwoven fabric to be torn, Since the cracks (cracks) are formed by the stretching action, the fibers are easily cut at the portions during bricking, and the thermocompression-bonded portions themselves are softened because the thermocompression-bonded portions are deformed by stretching, It is difficult to peel off the bristles and the bristle fibers are shortened to easily wrinkle, and a nonwoven fabric excellent in touch is obtained. The total draw ratio of the nonwoven fabric is preferably from 1.3 times to 4 times, more preferably from 1.5 times to 3 times, from the standpoint that the lowering of the breaking strength is less and the touch feeling is less than that of the original nonwoven fabric before stretching . The ratio of the area ratio of the thermocompression bonding portion of the nonwoven fabric to the total stretching magnification ratio (area ratio (%) of the thermocompression bonded portion of the nonwoven fabric / (total stretching magnification (x) x 100) is preferably 0.02 to 0.12, 0.10 is preferable in that the thermocompression bonding portion is adequately broken and the bristle amount is increased while maintaining the breaking strength. On the other hand, the original nonwoven fabric is provided with a thermocompression part which is regularly dispersed in the plane direction, and the thermocompression part includes not only the crimped part of the constituent fiber by heat but also the crimped part of constituent fiber by ultrasonic.

As shown in Fig. 11, each convex portion 210 of the roll 21 is convex on the circumferential surface of the roll 21 in order to set the mechanical stretching magnification within the above range, The height h to the apex of the portion 210 is preferably 1 to 10 mm, more preferably 2 to 7 mm. The distance (pitch P ₁ ) between the convex portions 210 adjacent to each other in the circumferential direction is preferably 0.01 to 20 mm, more preferably 1 to 10 mm, and the distance between adjacent convex portions 210 Pitch P ₂ (not shown)) is preferably 0.01 to 20 mm, more preferably 1 to 10 mm. The top surface of each convex portion 210 of the roll 21 is not particularly limited and may be circular, polygonal, elliptical, or the like. The area of the top surface of each convex portion 210 is 0.01 To 500 mm < 2 >, and more preferably 0.1 to 10 mm < 2 >. Further, the area of each bottom surface between adjacent convex portions 210 is preferably 0.01 to 500 mm 2, more preferably 0.1 to 10 mm 2. The R value is preferably from 0.2 mm to 0.5 x the dot diameter (A ₁ ) or 0.5 x the dot diameter (A ₂ ). The area of the surface of the convex portion 210 in this case is the middle point of R (projecting the convex portion from the upper surface). The partial mechanical stretching magnification is also obtained at the midpoint.

The ratio of the pitch of the thermocompression bonding portions (such as heat-sealed portions by embossing or the like) of the nonwoven fabric to the pitches of the convex portions 210 of the pair of rolls 21 and 22 (the pitch / convexity of the non- Pitch) is 0.05 to 0.7, more preferably 0.1 to 0.4, there is a high possibility that the thermally pressed portion of the nonwoven fabric is present on the stretched portion. Therefore, the thermocompression bonding portion is deformed and softened, and the weakening point by stretching is easily formed at the peripheral portion of the thermocompression bonding portion of the nonwoven fabric. Therefore, the surface of the nonwoven fabric is easily wiped with a light force, It is preferable that a fluff bundle is unlikely to be generated and a good touch can be obtained. Here, a preferable range of the ratio of the pitch of the nonwoven fabric thermocompression portion to the pitch of convex portions 210 of the pair of rolls 21, 22 is set so that the pitch of the thermocompression portions in the MD direction of the non- The ratio of the pitch P _{1 in} the circumferential direction of the convex portion 210 of the pair of rolls 21 and 22 to the pitch of the thermocompression bonding portion in the CD direction of the nonwoven fabric, Direction pitch P ₂ , it is preferable to satisfy both of them.

As shown in Figs. 10 and 11, the concave portions 220 of the roll 22 are disposed at positions corresponding to the convex portions 210 of the roll 21. 11, the convex portions 210 of the roll 21 and the convex portions of the roll 22 are engaged with each other in order to set the mechanical stretching magnification within the above-mentioned range, The depth D (length of the portion where each convex portion 210 and each concave portion 220 overlap) is preferably 0.1 to 10 mm, more preferably 1 to 8 mm. The gap between the top of the convex portion 210 of the roll 21 and the bottom of the concave portion 220 of the roll 22 is such that the nonwoven fabric 4 is spaced apart from the non- , And the nonwoven fabric 4 is not hardened.

10, the partial stretching part 2 is provided with conveying rolls 24 and 25 for conveying the nonwoven fabric 4 on the upstream side and the downstream side of the steel matching embossing roller 23. [ The conveying speed V1 of the nonwoven fabric 4 is controlled by a control unit (not shown) provided in the processing apparatus 1. [ Here, the conveying speed V1 of the nonwoven fabric 4 means the speed at the surface of the nonwoven fabric 4 released from the roll of the nonwoven fabric 4.

The bristle processing portion 3 is a portion that brims the constituent fibers 41 of the partially stretch-processed nonwoven fabric 4 '. In the working device 1 of the present embodiment, as shown in Fig. 12, And a convex roll 31 provided with a convex portion 310. The convex roll 31 is a metallic cylindrical shape such as an aluminum alloy or steel. The convex roll 31 rotates as the driving force is transmitted from the driving means (not shown) to the rotating shaft. The rotational speed (main speed V4) of the convex roll 31 is controlled by a control unit (not shown) provided in the machining apparatus 1. Here, the main speed V4 of the convex roll 31 means the speed at the surface of the convex roll 31 as well as the main speed V2 of the rolls 21 and 22.

As shown in Fig. 12, the brushed portion 3 is provided with transport rolls 32 and 33 for transporting the nonwoven fabric 4 'on the upstream side and the downstream side of the convex roll 31. As shown in Fig. The conveying speed V3 of the drawn nonwoven fabric 4 'is controlled by a control unit (not shown) provided in the processing apparatus 1. [ Here, the conveying speed V3 of the drawn nonwoven fabric 4 'refers to the speed at the surface of the nonwoven fabric 4' supplied to the convex roll 31 as well as the conveying speed V1 of the nonwoven fabric 4 before stretching .

Each convex portion 310 of the convex roll 31 preferably has a height from the circumferential surface of the convex portion 31 to the apex of the convex portion 310 of 0.01 to 3 mm and more preferably 0.01 to 1 mm. The distance (pitch) between the adjacent convex portions 310 in the circumferential direction is preferably 0.01 to 50 mm, more preferably 0.01 to 3 mm, and the distance (pitch) Is preferably 0.01 to 30 mm, more preferably 0.01 to 3 mm. The density of the convex portion is preferably 500 to 5000 pieces / cm 2 because the bristles have a large number of points of action and a large amount of bristles can be obtained. The shape of the top surface of each convex portion 310 of the convex roll 31 is not particularly limited and may be circular, polygonal, elliptical, or the like. The area of the top surface of each convex portion 310 may be 0.001 - More preferably from 0.01 to 1 mm < 2 >.

In the working device 1 of the present embodiment, from the viewpoint of more efficiently wringing the constituent fibers 41 of the partially drawn nonwoven fabric 4 ', as shown in Fig. 12, the position of the convex roll 31 The position of the conveying roll 33 on the downstream side of the convex roll 31 is set to a high position and the stretching nonwoven fabric 4 ' ), And it is more preferable that they are in contact with each other at a confining angle (alpha) of 30 to 120 DEG. On the other hand, in the machining apparatus 1 of the present embodiment, the positions of the convex roll 31 and the conveying roll 33 are changed so as to be the envelope angle?, But they do not have to be changed.

As described above, the processing apparatus 1 of the present embodiment includes a control unit (not shown), and the control unit controls the main speed V2 based on the driving means of the pair of rolls 21, 22, (V1) of the nonwoven fabric 4 based on the tension detection by the tension detector, and the transport speed V1 of the nonwoven fabric 4 'based on the tension detection by the tension detector, In accordance with a predetermined operation sequence.

Next, one embodiment of a method for producing a nonwoven fabric of the present invention will be described with reference to Figs. 9 to 12, using the above-described processing apparatus 1 of the present embodiment.

In the nonwoven fabric manufacturing method of the present invention, first, a plurality of portions of the nonwoven fabric 4 are subjected to partial stretching at a temperature of 50 DEG C or lower. In this embodiment, as shown in Fig. 9, the nonwoven fabric 4, which is a raw material, is unwound from a roll, and the nonwoven fabric 4 is fed by the conveying rolls 24, Is fed between the pair of rolls 21, 22 of the matching embossing roller 23, and the nonwoven fabric 4 is partially stretched. More specifically, the nonwoven fabric 4 conveyed by the conveying rolls 24 and 25 is conveyed to a plurality of convex portions 210 of one of the rolls 21 shown in Figs. 10 and 11, This is held between a plurality of depressions 220 and is stretched in the direction perpendicular to the carrying direction and the carrying direction to each of a plurality of portions of the nonwoven fabric 4 by the partial drawing process. Thus, by performing drawing in a direction orthogonal to the carrying direction and the carrying direction, the reduction of the breaking strength of the nonwoven fabric 4 can be suppressed for each direction. Here, the temperature of 50 DEG C or lower means that the temperature is not positively applied to the rolls 21 and 22, and the room temperature is when the nonwoven fabric 4 is subjected to the drawing process. In other words, when stretching the nonwoven fabric 4, it is preferable that the temperature is lower than the melting point of any kind of the constituent fiber resin from the viewpoint that the nonwoven fabric 4 is not hardened by causing thermal fusion between constituent fibers of the nonwoven fabric it means. On the other hand, the direction orthogonal to the transport direction is the same direction as the rotation axis direction of the roll described above.

In the present embodiment, in order to preferably perform the partial stretching process, the feed speed V1 when the nonwoven fabric 4 is fed between the pair of concave-convex rolls 21 and 22 and the pair of concave- It is preferable to set the relation of V1 / V2 to the main speed V2 of the first and second cams 21 and 22. It is more preferable that the value of V1 / V2 is 1.05 or more, and the value of V1 / V2 is 1.1 or more Particularly preferred. On the other hand, it is preferable that the value of V1 / V2 is smaller than 10 from the viewpoint of preventing the nonwoven fabric 4 being conveyed from being distorted. By reducing V1 / V2, the bristle amount is increased and the touch feeling is improved.

In the case of general stretching, such as uniaxial stretching, which is generally performed instead of the partial stretching process as in the present embodiment, since the main speed of the smoothing roll becomes larger than the feeding speed, the aforementioned V1 / V2 becomes smaller than 1 For example, in a typical spunbonded nonwoven fabric, when the total draw ratio of the nonwoven fabric of 1.3 times or more (obtained by V2 / V1 in uniaxial drawing) is present, tearing occurs in the nonwoven fabric. For this reason, the total stretching ratio of the nonwoven fabric can not be increased. In this embodiment, however, even if the total stretching ratio of the nonwoven fabric is 1.3 times or more, tearing of the nonwoven fabric is unlikely to occur.

In the nonwoven fabric manufacturing method of the present invention, brushed fabric is then brushed on the nonwoven fabric 4 'subjected to the partial stretching process. In this embodiment, as shown in Fig. 9, the nonwoven fabric 4 'subjected to the partial stretching is transferred to the convex roll 31 provided with the convex portions 310 on the circumferential surface thereof by conveying rolls 32 and 33 And the constituent fibers of the nonwoven fabric 4 'subjected to the partial stretching process are brushed on the surface of the nonwoven fabric 4' by the convex roll 31 shown in Fig.

In the present embodiment, as shown in Fig. 12, the rotation direction of the convex roll 31 is set to be the same as the direction of rotation of the nonwoven fabric 4 'in which the constituent fibers of the nonwoven fabric 4' Is rotated in the opposite direction to the conveying direction of the nonwoven fabric 4 '. In the case of rotating in the opposite direction, the value of V4 / V3 is preferably 0.3 to 10, more preferably V4> V3, more preferably 1.1 to 10, and more preferably 1.5 to 5, And the entanglement of the fibers in the roll is small. By rotating in the opposite direction, there is a difference in the main speed, the bristle amount is increased and the touch feeling is improved. On the other hand, when the convex roll 31 is not in the opposite direction but in the forward direction with respect to the conveying direction of the drawn nonwoven fabric 4 ', the conveying speed V3 of the partially drawn nonwoven fabric 4' The relationship of the main speed V4 of the convex roll 31 is preferably 1.1 to 20, more preferably 1.5 to 10, and particularly preferably 2 to 8 as V4 / V3.

As the nonwoven fabric 4 to be processed, for example, a spunbond nonwoven fabric, a laminated nonwoven fabric of a spunbond layer and a meltblown layer can be used, or a nonwoven fabric made of a continuous filament in a tow state can be used, And the spunbonded nonwoven fabric can be preferably used from the viewpoint of high fracture strength and thinness. On the other hand, in the case of the laminated nonwoven fabric, it is preferable that the nonwoven fabric is a spunbond layer disposed on the surface and / or the back surface of the meltblown layer. The laminated nonwoven fabric of the spunbond layer and the meltblown layer is preferably composed entirely of fibers made of a polypropylene resin containing at least 50% by weight of a recycled polypropylene resin. The continuous filament of the tow state preferably has a thickness of 5 to 30 占 퐉, more preferably 10 to 20 占 퐉.

The nonwoven fabric 4 is inexpensive and has good tactile feel. From the viewpoint of processability, the basis weight thereof is preferably 10 to 100 g / m 2, more preferably 10 to 25 g / m 2. The plurality of thermally fused portions of the nonwoven fabric 4 may be intermittently formed by thermocompression bonding, for example, by an embossing convex roll and a flat roll, but may be formed by ultrasonic welding or intermittently applying hot air and partially fusion- And the like. Of these, those formed by thermocompression bonding are preferable in that they are easily brushed. The shape of the thermally fused portion is not particularly limited and may be any shape such as a circle, a rhombus, or a triangle. The ratio of the total area of the thermally fused portions in the surface area of one surface of the nonwoven fabric 4 is preferably 5 to 30%, more preferably 10 to 20% in view of difficulty of forming a napkin.

In the case of using a spunbonded nonwoven fabric, the area of each of the plurality of thermally fused portions formed by the embossing of the spunbonded nonwoven fabric is preferably 0.05 to 10 mm 2, more preferably 0.1 to 1 mm 2. The number of the thermally fused portions is preferably 10 to 250 / cm 2, more preferably 35 to 65 / cm 2. The shape of the thermally fused portion is not particularly limited, and may be any shape such as a circle, rhombus, or triangle. The ratio of the total area of the thermally fused portions in the surface area of one surface of the spunbonded nonwoven fabric is preferably 5 to 30%, more preferably 10 to 20%.

The spunbond nonwoven fabric may be a single layer or a plurality of layers.

When the spunbond nonwoven fabric is used, the constituent fibers constituting the spunbonded nonwoven fabric are made of a thermoplastic resin, and examples of the thermoplastic resin include a polyolefin resin, a polyester resin, a polyamide resin, an acrylonitrile resin, a vinyl resin, Vinylidene resins, and the like. Examples of the polyolefin-based resin include polyethylene, polypropylene, and polybutene. Examples of the polyester-based resin include polyethylene terephthalate and polybutylene terephthalate. Examples of the polyamide-based resin include nylon and the like. Examples of the vinyl resin include polyvinyl chloride and the like. Examples of the vinylidene resin include polyvinylidene chloride and the like. Modified products and mixtures of these various resins may also be used. The minor axis of the constituent fibers is preferably 5 to 30 占 퐉, more preferably 10 to 20 占 퐉, before the partial stretching.

As described above, according to the nonwoven fabric manufacturing method of the present embodiment in which the nonwoven fabric is manufactured by using the processing apparatus 1, the plurality of portions of the nonwoven fabric 4 are first subjected to the partial stretching process at a temperature of 50 DEG C or lower The non-woven fabric 4 '' is soft and has a soft feel and the soft fibers 4 '' are obtained, since the woven fabric 4 ' . The obtained nonwoven fabric 4 '' is subjected to the partial stretching process at each of a plurality of portions of the nonwoven fabric 4 before processing, and since the partial stretching process is not performed except for the plurality of portions, the nonwoven fabric strength can be maintained at that portion The lowering of the strength of the nonwoven fabric can be reduced. In particular, when a nonwoven fabric having high strength of the nonwoven fabric itself such as a spunbonded nonwoven fabric is used as the raw nonwoven fabric 4 as a raw material, the conveying speed can be made faster and the manufacturing cost of the nonwoven fabric 4 '' can be suppressed. On the other hand, in the present embodiment, since the partial stretching is performed by using the roll comprising the pair of rolls 21 and 22 and the brushed work is performed by using the roll formed by the convex roll 31, ''), And further it is possible to suppress the production cost of the nonwoven fabric 4 ''.

Especially when the above-described spunbonded nonwoven fabric is used as the nonwoven fabric 4, the spunbonded nonwoven fabric having a breaking strength value of 10 to 30 N / 50 mm on a basis weight of 20 g / m 2, The breaking strength value is 5 to 20 N / 50 mm, and the decrease in the strength of the nonwoven fabric can be reduced to 50% or less. As described above, the breaking strength value of the spunbonded nonwoven fabric obtained after processing is substantially equal to the breaking strength value of the original spunbonded nonwoven fabric. The breaking strength preferably satisfies the above-described range in either the X-direction or the Y-direction of the original spun-bonded nonwoven fabric or the spun-bonded nonwoven fabric obtained after processing, and more preferably satisfies the above range in both directions. The breaking strength is measured by the following method.

[Measurement of breaking strength]

The original spunbonded nonwoven fabric or the spunbonded nonwoven fabric obtained after the processing is cut out in a rectangular shape measuring 50 mm in the X direction (width direction, CD direction) and 200 mm in the Y direction (length direction, MD direction). This cut-out rectangular measuring piece is used as a measurement sample. The measurement sample is mounted on a chuck of a tensile tester (e.g., Tensilon tensile tester "RTA-100" manufactured by Orientech) so that the X direction is the tensile direction. The distance between the chucks is set to 150 mm. The measurement sample is pulled at 300 mm / minute, and the maximum load point up to the sample break is taken as the breaking strength in the X direction. A rectangular measuring piece having a size of 50 mm in the X direction (width direction, CD direction) is cut out in the Y direction (longitudinal direction, MD direction) and 200 mm, and this is used as a measurement sample. The measurement sample is mounted on the chuck of the tensile tester so that the Y direction is the tensile direction. The breaking strength in the Y direction is obtained in the same manner as the aforementioned breaking strength measurement method in the X direction.

Particularly when the above-mentioned spunbonded nonwoven fabric is used as the nonwoven fabric 4, the constituent fibers of the nonwoven fabric brushed on the surface of the spunbonded nonwoven fabric obtained after the processing is short, and the appearance is less aesthetically pleasing. Here, the constituent fiber brushed on the surface of the nonwoven fabric means a fiber in which the tip of the brushed constituent fiber is located at least 0.2 mm above the surface of the nonwoven fabric.

The inventors of the present invention have found that when the spunbonded nonwoven fabric is used, the constituent fibers of the nonwoven fabric brushed on the surface of the spunbonded nonwoven fabric are short. Since the weakening point is formed in the thermally fused portion of the spunbonded nonwoven fabric at the time of stretching and then the surface is processed by the convex roll 31 of the bristle-processed portion 3, the spunbonded nonwoven fabric The continuous filaments constituting the constituent fibers of the continuous filaments are broken, and the filaments cut at the heat-sealed portions are formed.

From the viewpoint of improving the feel of the nonwoven fabric, it is preferable that the number of woven fibers is 8 / cm or more, more preferably 12 / cm or more. From the viewpoint of obtaining a sufficient breaking strength, the upper limit is preferably not more than 100 / cm, more preferably not more than 40 / cm from the viewpoint of appearance of nappy. The brushed fibers are measured by the following measuring method.

[Method of Measuring the Number of Brushed Composite Fibers]

13 is a schematic view showing a method of measuring the number of brushed constituent fibers. The sampling and measurement environment is performed under the environment of 22 ° C and 65% RH. First, a measuring piece of 20 cm x 20 cm is cut out of a nonwoven fabric to be measured with a sharp razor, and the measuring sample is folded outward so that the brim side is outward as shown in Fig. 13 (a) to form a measurement sample 104. Next, the measurement sample 104 is laid on a black ground of A4 size, and a black ground of A4 size is laid out with a hole 107 of 1 cm length x 1 cm width as shown in Fig. 13 (b). At this time, as shown in Fig. 13 (b), the folding line 105 of the measurement sample 104 is arranged so as to be visible in the hole 107 in the upper black ground. On both sides, "Kenlan (black) weight 265 g" of Fuji Kyowa and Seishi Kabushiki Kaisha was used. Thereafter, a weight of 50 g is placed on each of the both sides of the upper ground hole 107 at a position 5 cm away from the outer side along the folding line 105 to make the measurement sample 104 completely folded. Next, as shown in Fig. 13C, the inside of the hole 107 of the ground is observed at a magnification of 30 times using a microscope (VHX-900 manufactured by KEYENCE CO., LTD.) And the folding line 105 The number of brushed fibers brushed above the imaginary line 108 formed at a position shifted upward by 0.2 mm is measured. In the nonwoven fabric to be measured at this time, if the width of the brushed portion is 1 cm or more, three pieces of 20 cm x 20 cm pieces are cut out so as to include the brushed portion. Also, if the width of the brushed part is less than 1 cm, cut out three pieces of 20 cm × 20 cm pieces randomly and measure them. The above operations are measured for three nonwoven fabrics to be measured, and an average of 9 portions in total is taken as the number of wired constituent fibers.

Further, when counting the number of brushed constituent fibers, fibers that cross the imaginary line 108, which is 0.2 mm above the folding line 105 twice, such as the fibers 106a shown in Fig. 13 (c) If present, the fibers count as two. Specifically, in the example shown in Fig. 13 (c), there are four fibers crossing the imaginary line 108 once, and one fiber 106a crossing the imaginary line 108 twice. The number of constituent fibers that are brushed by the number of the crossing fibers 106a is six.

Unlike woolen fabrics, the nonwoven fabrics obtained by the method for producing nonwoven fabric according to the present invention have no adverse effect on the skin due to the use of adhesives or the like, So that the risk of being exposed can be reduced. Also, problems such as flaking of the flocked fiber and exposure of the adhesive surface do not occur during use. For example, the spunbonded nonwoven fabric which is one of the nonwoven fabrics used in the absorbent article is thin and tends to be easily torn in general bridging. However, according to the nonwoven fabric manufacturing method of the present invention, brass with high bristiness and good feel ) Nonwoven fabric is obtained.

The nonwoven fabric obtained by the nonwoven fabric manufacturing method of the present invention is also characterized by being fluffy although there is no thickness. The thickness of the nonwoven fabric before working is hardly changed, but the difference is small in thickness under low load. For example, both the spunbonded nonwoven fabric obtained by the nonwoven fabric manufacturing method of the present invention and the conventional spunbonded nonwoven fabric before processing have a thickness of 0.15 mm to 0.18 mm under a high load of 10 gf / cm 2 at a basis weight of 15 g / m 2. However, under the reduction of 0.05 gf / cm 2, the spun bond nonwoven fabric before processing has a thickness of 0.41 mm to 0.46 mm, while the spunbond nonwoven fabric obtained by the nonwoven fabric manufacturing method of the present invention has a different thickness of 0.5 mm to 0.6 mm . On the other hand, the load of 0.05 gf / cm < 2 > corresponds to the finger load of a person when the nonwoven fabric is lightly pressed, and the person feels fluffy by recognizing this slight thickness difference.

The nonwoven fabric manufacturing method of the present invention is not limited to the manufacturing method of the above-described embodiment, and can be appropriately changed.

For example, in the processing apparatus 1 used in the nonwoven fabric manufacturing method of the present embodiment, as shown in Figs. 9 and 10, a pair of uneven rolls 21 and 22 ), But instead of the steel matching embossing roller 23, there may be provided a pair of tooth groove rolls provided on circumferential surfaces to be engaged with each other. In this case, the pair of tooth groove rolls may be engaged with each other in the carrying direction or in a direction crossing the carrying direction. In the case of a pair of toothed groove rolls which are engaged with each other in the direction crossing the conveying direction, a pair of the toothed groove rolls can be rotated even if the amount of pushing is large, Is obtained. More preferably, since the non-woven portion is intermittently distributed, the lowering of the breaking strength of the nonwoven fabric is less, the wrinkle hardly occurs during processing, and the stretching is applied to both the MD and CD directions, Roller is good.

Further, in order to give designability, it is also preferable to brushed in a stripe shape or partially brushed in a patterned shape.

9 and 12, in the machining apparatus 1 used in the nonwoven fabric manufacturing method of the present embodiment, the convex roll 31 having the convex portions 310 on the circumferential surface is provided on the brushed portion 3, It is also possible to provide a pair of toothed groove rolls provided on circumferential surfaces of the toothed grooves to be engaged with each other instead of the convex rolls 31. Alternatively, a knurled roller or a thermal sprayed roller, or carding wire. Further, a roll provided with a material having frictional resistance on the circumferential surface may be provided. Examples of the material having the frictional resistance provided on the circumferential surface of the roll include rubber and sand paper. The partial stretching and brushed processing may be performed continuously or sequentially. According to the nonwoven fabric manufacturing method of the present embodiment, after the brushed fabric is wound as the nonwoven fabric fabric, the brushed fibers are once collapsed, and then they come into contact with the hands when unwound, The bristles easily crushed and broken, and the nonwoven fabric and the absorbent article having good feel are obtained.

Example

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited to these embodiments.

[Example 1]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter referred to as SMS) having a basis weight of 15 g / m 2 and having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 14.7 μm was used Is referred to as Comparative Example 4). Next, the SMS nonwoven fabric was passed through a steel matching embossing roller 43 shown in Fig. 3, surface-processed with a convex roll 51 shown in Fig. 4, and subjected to two-step treatment to obtain a nonwoven fabric. Each convex portion 410 of the roll 41 of the steel matching embossing roller 43 used has a height of 2.8 mm and the convex portion 410 of the roll 41 and each concave portion of the roll 42 420) was 2.7 mm. The distance (pitch) between adjacent convex portions 410 in the direction of the axis of rotation was 7 mm, and the distance (pitch) between neighboring convex portions 410 in the circumferential direction was 7 mm. The height of each convex portion 510 of the convex roll 51 used is 0.6 mm and the distance (pitch) between adjacent convex portions 510 in the rotational axis direction is 1.4 mm and the circumferential convex portions 510 (Pitch) was 2.1 mm. The convex roll was rotated at a speed four times in the opposite direction to the conveying direction of the nonwoven fabric. The enclosure angle was 130 degrees. Each conveying speed was 10 m / min.

[Example 2]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m 2 and having a spunbond layer made of propylene resin having a fiber diameter of 17.7 μm was used. Next, the SMS nonwoven fabric was subjected to two-step treatment under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Example 3]

(Spunbond-spunbond-meltblown-spunbond laminated nonwoven fabric having a basis weight of 18 g / m < 2 >, hereinafter also referred to as SSMS) having a spunbond layer composed of an ethylene propylene copolymer resin having a fiber diameter of 12.9 mu m, Of the spunbond layer was overlaid with a softening agent). Next, this SSMS nonwoven fabric was treated in two steps under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Example 4]

(Spunbond-meltblown-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMMS) having a spunbond layer made of propylene resin having a fiber diameter of 14.6 占 퐉 and a basis weight of 12 g / m 2 was used. Next, the SMMS nonwoven fabric was treated in two steps under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Example 5]

A nonwoven fabric having a basis weight of 18 g / m 2 (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 14.9 μm was used. Also, a softener was put into the spunbond layer on one side of the SMS nonwoven fabric. Next, the side of the SMS nonwoven fabric on which the softener was put was treated in two steps under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Example 6]

A nonwoven fabric having a basis weight of 18 g / m 2 (a spunbond-spunbond-spunbond laminated nonwoven fabric, hereinafter also referred to as SSS) having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 15.0 μm was used. The nonwoven fabric of this SSS was also mixed with a softener. Next, this SSS nonwoven fabric was subjected to two-step treatment under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Example 7]

A nonwoven fabric having a basis weight of 18 g / m 2 (spunbonded-spunbond-spunbonded laminated nonwoven fabric, hereinafter also referred to as SSS) having a spunbond layer made of propylene resin having a fiber diameter of 14.9 m was used. Next, this SSS nonwoven fabric was subjected to two-step treatment under the same conditions as in Example 1 to obtain a nonwoven fabric.

[Comparative Example 1]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m 2 and having a spunbond layer made of ethylene propylene copolymer resin having a fiber diameter of 14.7 μm was used in the same manner as in Example 1 Respectively. Next, in order to reproduce the needle punching process, the surface of the 5 cm x 5 cm SMS nonwoven fabric was woven with a sharp-pointed tweezers (TWEEZERS product, tweezers K-14) By pulling the fibers of the surface by pulling up, the operation of pulling the stuck fibers 30 times was performed to obtain a nonwoven fabric having a surface of fibers.

[Comparative Example 2]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m 2 and having a spunbond layer made of ethylene propylene copolymer resin having a fiber diameter of 14.7 μm was used in the same manner as in Example 1 Respectively. Next, this SMS nonwoven fabric was subjected to cutting treatment to obtain a nonwoven fabric. The cutting method used was obtained by cutting a spun bonded nonwoven fabric immersed in liquid nitrogen for 5 minutes with a razor blade.

[Comparative Example 3]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m 2 and having a spunbond layer made of ethylene propylene copolymer resin having a fiber diameter of 14.7 μm was used in the same manner as in Example 1 Respectively. Next, the sand paper size # 240 made by Trusco Nakayama Co., Ltd. was adhered to the entire circumference of the roll of 110 by double-sided tape, and the roll of the SMS nonwoven fabric 10 m / min. At that time, the roll adhering the sand paper was rotated at a rotation speed of 50 m / min opposite to the direction of advance to obtain a nonwoven fabric in which the fibers were broken.

[Comparative Example 4]

(Spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter referred to as SMS) having a basis weight of 15 g / m < 2 > and having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 14.7 mu m used in Example 1 was used. No brushed finish was applied.

[Comparative Example 5]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m < 2 > and having a spunbond layer made of propylene resin having a fiber diameter of 17.7 mu m used in Example 2 was used. Next, in order to reproduce the needle punching treatment on the SMS nonwoven fabric, the surface fibers of the 5 cm x 5 cm SMS nonwoven fabric were cut into sharp-pointed portions using a sharp tweezers (TWEEZERS, Tweezers K-14) And the pulled-up fibers were pulled and pulled out 30 times to obtain a nonwoven fabric having a surface of fibers.

[Comparative Example 6]

A nonwoven fabric (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a basis weight of 15 g / m < 2 > and having a spunbond layer made of propylene resin having a fiber diameter of 17.7 mu m used in Example 2 was used. No brushed finish was applied.

[Comparative Example 7]

A nonwoven fabric (spunbond-spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SSMS) having a basis weight of 18 g / m 2 and having a spunbond layer made of ethylene propylene copolymer resin having a fiber diameter of 12.9 탆 used in Example 3 The spunbond layer on both sides of this SSMS nonwoven fabric was overlaid with a softener. No brushed finish was applied.

[Comparative Example 8]

A nonwoven fabric having a basis weight of 12 g / m 2 (spunbond-meltblown-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMMS) having a spunbond layer made of propylene resin having a fiber diameter of 14.6 탆 and used in Example 4 Respectively. No brushed finish was applied.

[Comparative Example 9]

A nonwoven fabric having a basis weight of 18 g / m 2 (spunbond-meltblown-spunbond laminated nonwoven fabric, hereinafter also referred to as SMS) having a spunbond layer made of propylene resin having a fiber diameter of 14.9 탆 and used in Example 5 was used. Also, a softener was put into the spunbond layer on one side of the SMS nonwoven fabric. No brushed finish was applied.

[Comparative Example 10]

A nonwoven fabric having a basis weight of 18 g / m 2 (spunbonded-spunbond-spunbond laminated nonwoven fabric, hereinafter also referred to as SSS) having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 15.0 탆 and used in Example 6 was used. The nonwoven fabric of this SSS was also mixed with a softener. No brushed finish was applied.

[Comparative Example 11]

A nonwoven fabric having a basis weight of 18 g / m 2 (spunbonded-spunbond-spunbonded laminated nonwoven fabric, hereinafter also referred to as SSS) having a spunbond layer made of an ethylene propylene copolymer resin having a fiber diameter of 14.9 μm and used in Example 7 was used. No brushed finish was applied.

[Performance evaluation]

The nonwoven fabrics obtained in Examples 1 to 7, Comparative Examples 1 to 3, and Comparative Example 5 were measured for fiber diameter by the above-mentioned measurement method of fiber diameter to determine the increasing ratio of the fiber diameter at the end, Is shown in Table 1, Table 2, Table 3, and Table 4 as "? &Quot;

The nonwoven fabric obtained in Examples 1 to 7, Comparative Examples 1 to 3, and Comparative Example 5 was subjected to the above-described fiber diameter measurement method so that only one end portion 20a of the nonwoven fabric was fixed by the heat- The free ends 20b of the fibers 21 in the free ends 20b of the fibers 21 in the free ends 20b (the fibers 21 having the thick free ends 20b and the fibers 22 having no thick free ends 20b) The ratios were obtained, and the results are shown in Table 1, Table 2, Table 3 and Table 4 when the ratio of the obtained thickened fibers 21 was 20% or more.

The fibers (one end portion 20a only) of the nonwoven fabric were bonded to the heat-sealed portion 3 by the above-described method of measuring the fiber diameter with respect to the nonwoven fabric obtained in Examples 1 to 7, Comparative Examples 1 to 3 and Comparative Example 5 In the fiber 20 (the fiber 21 having the free end 20b thickened and the fiber 22 having the free end 20b not thickened) and the loop-shaped fiber 23 fixed by the fiber- The ratio of the loop-shaped fibers 23 was found to be ◯ when the ratio of the obtained loop-shaped fibers 23 was less than 50%, and when the ratio was 50% or more, Respectively.

The distribution of the fiber diameters in the nonwoven fabric was determined for the nonwoven fabrics obtained in Examples 1 to 7 and Comparative Examples 1 to 11 by the above-mentioned measurement method of the fiber diameter distribution. When the distribution of the obtained fiber diameters was 0.33 or more, And when it was less than 0.33, the results are shown in Table 1, Table 2, Table 3, and Table 4.

[Sensory evaluation of touch]

The nonwoven fabrics obtained in Examples 1 to 7, Comparative Examples 1 to 3, and Comparative Examples 5 to 11 were evaluated in terms of the number of nonwoven fabrics of Comparative Example 4 as the reference (3 points) ) Were subjected to sensory evaluation to obtain an average value of three sheets for each nonwoven fabric by rounding off to an integer and the respective nonwoven fabrics obtained in Examples 1 to 7, Comparative Examples 1 to 3 and Comparative Example 5 (Example 1 and Comparative Example 5, Example 2 and Comparative Example 6, Comparative Example 5 and Comparative Example 6, Example 3 and Comparative Example 7, Example 4 and Comparative Example 8, Example 5 and Comparative Example 9, The results are shown in Table 1. Example 6 and Comparative Example 10, Example 7 and Comparative Example 11, Comparative Examples 1 to 4 and Comparative Example 5 When the average value of the sensory evaluation obtained was improved, Table 2, Table 3 and Table 4 show the results.

[Evaluation of rupture strength ratio]

Measurement samples of 200 mm in the X direction (width direction) and 50 mm in the Y direction (length direction) were taken with respect to the nonwoven fabric obtained in Examples 1 to 7 and Comparative Examples 1 to 11 by the measurement of breaking strength described above, (Width direction) was pulled at a tensile speed of 300 mm / min with a tensile tester (manufactured by Shimadzu Seisakusho Co., Ltd.) having a width of 150 mm, and the average value of four sheets was taken as the strength in the X direction (width direction). Next, the intensities in the X direction (width direction) of the original nonwoven fabric (for example, Comparative Example 5 in Example 1) before brick processing of the nonwoven fabric obtained in Examples 1 to 7, Comparative Examples 1 to 3 and Comparative Example 5 were measured , The ratios of the breaking strengths of the nonwoven fabric obtained in Examples 1 to 7, Comparative Examples 1 to 3, and Comparative Example 5 to the original nonwoven fabric before brushed processing were evaluated. The results are shown in Table 1, Table 2, Table 3, and Table 4.

[Evaluation of shedding of fuzz]

Test pieces having a length of 200 mm in the X direction (width direction) and 200 mm in the Y direction (longitudinal direction) were taken from the nonwoven fabric obtained in Examples 1 to 7 and Comparative Examples 1 to 11, and one surface of this test piece was evaluated Respectively. Specifically, the evaluation surface was set up, and the four sides of the test piece were fixed to the plate with a check tape. A friction plate wound with a sponge (Moltoprene MF-30) was set on the test piece. The load of the sponge was 240 g. Three sets of forward rotation and three sets of reverse rotation were set as one set, and the friction plate was rotated. 15 sets of these were performed. One rotation was performed at a speed of 3 seconds. Then, all the fibers attached to the sponge by the rotation were attached to the transparent adhesive tape. This adhesive tape was attached to a black ground. From the surface state of the test piece and the fibers adhering to the adhesive tape, the degree of hair dropping was visually evaluated according to the following criteria. The obtained results are shown in Tables 1, 2, 3 and 4.

○: The test piece has little fluff or fluff. There is almost no adhesion of the fibers to the adhesive tape.

?: The test piece was found to have a lint or a lint bundle, but the adhesive tape had no lump shape of the fiber.

X: The test piece is allowed to have a lint or a lint bundle, and the lint shape of the fiber is much recognized on the adhesive tape.

The nonwoven fabric obtained in Examples 1 to 7 and Comparative Examples 1 to 11 was subjected to the above-mentioned measurement of the compression characteristic value at the time of the minute load to determine the compression characteristic value at the time of the minute load in the nonwoven fabric, (Gf / cm < 2 >) / mm or less, and the results are shown in Table 1, Table 2, Table 3, and Table 4 when x is larger than 18.0 (gf / cm2) / mm.

Further, the number of fibers brushed by the above-mentioned method of measuring the worn-out fibers was determined for the nonwoven fabric obtained in Examples 1 to 7 and Comparative Examples 1 to 11, and when the number of the obtained fibers was 8 / cm or more, , And when the number is less than 8 / cm, the results are shown in Table 1, Table 2, Table 3, and Table 4.

The height of the fibers brushed by the above-mentioned method of measuring the height of the brushed fibers was determined for the nonwoven fabrics obtained in Examples 1 to 7 and Comparative Examples 1 to 11, and when the height of the obtained fibers was 1.5 mm or less, And when it is higher than 1.5 mm, the results are shown in Table 1, Table 2, Table 3, and Table 4.

As is apparent from the results shown in Table 1, the nonwoven fabric of Example 1 has a higher ratio of the fibers 21 having the free end portion 20b thicker than the nonwoven fabric of Comparative Examples 1 to 3. Further, it can be seen that the nonwoven fabric of Example 1 has a higher rate of increase of the fiber diameter at the end than the nonwoven fabric of Comparative Examples 1 to 3. It is also understood that the nonwoven fabric of Example 1 has a smaller proportion of the loop-shaped fibers 23 and a wider distribution of fiber diameters than the nonwoven fabric of Comparative Examples 1 to 3. The nonwoven fabric of Example 1 was superior in touch to the untreated nonwoven fabric of Comparative Example 4, less in the breaking strength, less prone to hair loss and fluff, and was non-stick to the skin. On the other hand, the nonwoven fabric of Comparative Examples 1 and 2 had no change in tactile evaluation with the untreated nonwoven fabric of Comparative Example 4, and the nonwoven fabric of Comparative Example 3 had an improved tactile feel against the nonwoven fabric of Comparative Example 4, . The nonwoven fabric of Example 1 described above is superior to the untreated nonwoven fabric of Comparative Example 4 in that the nonwoven fabric of Example 1 has a lower compression characteristic value at the time of minute load than the nonwoven fabric of Comparative Example 4 that is untreated, It is also possible to judge from the fact that the number is large.

Further, as apparent from the results shown in Tables 2, 3 and 4, when the components constituting the nonwoven fabric of Example 1 were different from each other, or when the presence or absence of a softening agent and the basis weight of the nonwoven fabric of Example 1 were changed Similar to the nonwoven fabric of Examples 2 to 7, the nonwoven fabric of Comparative Examples 6 to 9 was improved in tactility and reduced in the breaking strength, as compared with the nonwoven fabric of Comparative Examples 6 to 9, which was not treated. The nonwoven fabrics of Examples 2 to 7 had lower compressive characteristics at the time of a minute load than those of the nonwoven fabrics of Comparative Examples 6 to 11 which were not treated and the number of worn fibers was large It can be judged. However, even if the number of fibers brushed more than the non-woven fabric of Comparative Example 6, which is not treated, as in the nonwoven fabric of Comparative Example 5, becomes too high, it becomes evident that the tactile evaluation becomes worse. It is also understood that when an ethylene propylene copolymer or a softening agent is mixed with the resin, the feel is further improved. In addition, the nonwoven fabrics of Examples 6 and 7 have good compressive characteristics at the time of a minute load, and thus have good tactile sensation.

[Example 8]

An SMS nonwoven fabric having a basis weight of 15 g / m 2 and 1.3 dtex and an area ratio of a thermocompression bonding portion (thermal fusion portion by embossing) having a spunbonded nonwoven fabric layer made of an ethylene-propylene copolymer resin was used. To obtain a nonwoven fabric of Example 8, which was brushed by the above-described working method shown in Figs. 9 to 12. The convex portions 210 of the rolls of the steel matching embossing rollers 23 used are of a height of 2.8 mm and the depths D of the convex portions 210 of the roll 21 and the convex portions of the roll 22 ) Was 2.7 mm. The distance (pitch P ₂ ) between adjacent convex portions 210 in the rotational axis direction is 7 mm and the distance (pitch P ₁ ) between neighboring convex portions 210 in the circumferential direction is 7 mm. The main speed V2 of the steel-matched embossing roll was 20 m / min, and the conveying speed V1 of the nonwoven fabric was 26 m / min. Further, the height of each convex portion 310 of the convex roll 31 used for brushed was 0.6 mm, the distance (pitch) between adjacent convex portions in the rotational axis direction was 1.4 mm, the distance between neighboring convex portions in the circumferential direction (Pitch) was 2.1 mm. The conveying speed V3 of the nonwoven fabric was 20 m / min, and the convex roll 31 was rotated at a main speed V4 four times in the opposite direction to the conveying direction of the nonwoven fabric. The enclosure angle was 130 degrees. In Example 8, only one side was brushed. The total draw ratio of the nonwoven fabric was 1.7 times. (Ratio of the pitch of the nonwoven fabric thermocompression bonding portion to the pitch of the convex portion) was 0.43 in the MD direction (roll circumferential direction) and 0.37 in the CD direction (roll rotation axis direction). The ratio of the area ratio of the thermocompression bonded portion of the nonwoven fabric to the total stretching ratio of the nonwoven fabric was 0.088.

[Example 9]

An SMS nonwoven fabric having a layer of a spunbonded nonwoven fabric made of propylene resin having a basis weight of 13 g / m 2, a fiber diameter of 15.9 탆, and an area ratio of a thermocompression bonding portion (heat fusion portion by embossing) of 13% was used. The resultant was processed under the same conditions as in Example 8 to obtain a nonwoven fabric of Example 9. The total draw ratio of the nonwoven fabric was 1.7 times. (Pitch of the convex portion of the nonwoven fabric thermocompression bonding portion) was 0.41 and the CD direction (roll rotation axis direction) was 0.24. The ratio of the pitch of the nonwoven fabric thermocompression portion to the pitch of convex portions of the concave- The ratio of the area ratio of the thermocompression bonded portion of the nonwoven fabric to the total stretching ratio of the nonwoven fabric was 0.076.

[Example 10]

A spunbond layer having a layer of a spunbonded nonwoven fabric made of propylene resin having a basis weight of 18 g / m 2 and 1.8 dtex and an area ratio of a thermocompression bonding portion (thermally fused portion by embossing) of 12% Respectively. The resultant was processed under the same conditions as in Example 8 to obtain a nonwoven fabric of Example 10. The total draw ratio of the nonwoven fabric was 1.7 times. (Pitch of the convex portion of the nonwoven fabric thermocompression bonding portion) was 0.3 in the MD direction (roll circumferential direction) and 0.3 in the CD direction (roll rotation axis direction) of 0.3 in terms of the pitch of the nonwoven thermocompression bonding portion and the pitch of convex portions of the uneven roll. The ratio of the area ratio of the thermocompression bonded portion of the nonwoven fabric to the total stretching ratio of the nonwoven fabric was 0.071.

[Example 11]

As in Example 8, an SMS nonwoven fabric having a basis weight of 15 g / m 2 and 1.3 dtex and having a spunbond nonwoven fabric layer made of an ethylene-propylene copolymer resin was used. Like in the eighth embodiment, machining was carried out by a steel-matched embossing roller. The total draw ratio of the nonwoven fabric was 1.7 times. (Ratio of the pitch of the nonwoven fabric thermocompression bonding portion to the pitch of the convex portion) was 0.43 in the MD direction (roll circumferential direction) and 0.37 in the CD direction (roll rotation axis direction). The ratio of the area ratio of the thermocompression bonded portion of the nonwoven fabric to the total stretching ratio of the nonwoven fabric was 0.088. Thereafter, convex rolls having a protrusion height of about 0.07 mm and a protrusion density of about 2000 protrusions / cm 2 were used for the bristles. The conveying speed V3 of the nonwoven fabric was 20 m / min, and the convex roll 31 was rotated at a main speed V4 four times in the direction opposite to the conveying direction of the nonwoven fabric. The enclosure angle was 60 degrees. In Example 11, only one side was brushed.

[Comparative Example 12]

Similarly to Example 8, an SMS nonwoven fabric having a basis weight of 15 g / m 2 and 1.3 dtex and having a spunbonded nonwoven fabric layer made of an ethylene-propylene copolymer resin was used as the nonwoven fabric of Comparative Example 12.

[Comparative Example 13]

As in Example 8, an SMS nonwoven fabric having a basis weight of 15 g / m 2 and 1.3 dtex and having a spunbond nonwoven fabric layer made of an ethylene-propylene copolymer resin was used. Next, the sand paper size # 240 made by Trus KONAKAYA CO., LTD. Was adhered to the entire circumference of the roll of 110 by double-sided tape, and the SMS nonwoven fabric was rolled up at a rate of 10 m / min . At that time, the roll adhered with the sandpaper was rotated at a rotation speed of 40 m / min in a direction opposite to the running direction to obtain a nonwoven fabric of Comparative Example 13 which was worn.

[Comparative Example 14]

As in Example 9, an SMS nonwoven fabric having a spunbonded nonwoven fabric layer made of propylene resin having a basis weight of 13 g / m 2 and a fiber diameter of 15.9 탆 was used as the nonwoven fabric of Comparative Example 14.

[Comparative Example 15]

As in Example 9, an SMS nonwoven fabric having a spunbonded nonwoven fabric layer made of propylene resin and having a basis weight of 13 g / m 2 and a fiber diameter of 15.9 탆 was used. Next, the nonwoven fabric of Comparative Example 15 was obtained by processing under the same conditions as in Comparative Example 13.

[Comparative Example 16]

Similarly to Example 10, a nonwoven fabric having a spunbonded nonwoven fabric layer made of propylene resin and having a basis weight of 18 g / m 2 and 1.8 dtex and having no meltblown layer was used as the nonwoven fabric of Comparative Example 16.

[Comparative Example 17]

As in Example 10, a nonwoven fabric having a spunbonded nonwoven fabric layer made of propylene resin and having a basis weight of 18 g / m 2 and 1.8 dtex and having no meltblown layer was used. Next, the non-woven fabric of Comparative Example 17 was obtained by processing under the same conditions as Comparative Example 13.

Performance evaluation

[Sensory evaluation of touch]

Sensitivity evaluation was performed on the nonwoven fabric obtained in Examples 8 to 11 and Comparative Examples 12 to 16 in 10 steps (better tactile feeling toward 10 points) when the nonwoven fabric of Comparative Example 12 was used as a reference (3 points) Woven fabric obtained in Examples 8 to 11 and Comparative Examples 12 to 16 was compared with each of the untreated nonwoven fabrics in Example 8 and Comparative Example 12 and Comparative Example 12 Examples 9 and 14, Example 10 and Comparative Example 16, Comparative Example 13 and Comparative Example 12, Comparative Example 15 and Comparative Example 14, and Comparative Example 17 and Comparative Example 16). When the average value of the sensory evaluation obtained was improved, And those in which the average value did not change were indicated by X in Tables 5, 6, and 7.

[Evaluation of brushed constituent fibers]

For the nonwoven fabric obtained in Examples 8 to 11 and Comparative Examples 12 to 16, the number of constituent fibers brushed by the above-mentioned method of measuring the number of woven constituent fibers was measured. The results are shown in Table 5, Table 6, and Table 7 as "? &Quot; when the number of worn constituent fibers is 10 or more,?

[Evaluation of breaking strength]

The nonwoven fabric obtained in Examples 8 to 11 and Comparative Examples 12 to 16 was measured for the breaking strength in the X direction (width direction, CD direction) by 200 mm and in the Y direction (length direction, MD direction) by 50 mm The measurement sample was taken and pulled at a tensile speed of 300 mm / min with a tensile tester (manufactured by Shimadzu Seisakusho Co., Ltd.) with a chuck distance of 150 mm to measure the strength in the X direction (width direction and CD direction) Width direction, CD direction). Next, compared with the respective untreated nonwoven fabrics (Example 8 and Comparative Example 12, Example 9 and Comparative Example 14, Example 10 and Comparative Example 16, Comparative Examples 13 and 12, Comparative Examples 15 and 14, (Example 17 and Comparative Example 16), and the intensity ratio in the X direction (width direction, CD direction) was 50% or more, and when the ratio was less than 50%, the result was shown in Tables 5, 6 and 7.

As is clear from the results shown in Table 5, the nonwoven fabric of Example 8 was a nonwoven fabric excellent in touch and less in breaking strength. Specifically, it can be seen that the nonwoven fabric of Example 8 has significantly improved tactility as compared to the nonwoven fabric of Comparative Example 12. On the other hand, the nonwoven fabric of Comparative Example 13 had better tactile feel than the nonwoven fabric of Comparative Example 12, but the decrease in the breaking strength was remarkable. Regarding the nonwoven fabric of Example 8, most of the brushed fibers were not loop-shaped, but had their ends cut off, and there was no fingertip. Also, since the fiber residue was not visible on the roll part, it was good. On the other hand, at the time of producing the nonwoven fabric of Comparative Example 13, adhesion of fiber residue to the sandpaper was observed, and durability of the sandpaper was also problematic.

As is clear from the results shown in Table 6, the nonwoven fabric of Example 9 was also a nonwoven fabric having improved tactile feel and reduced breaking strength, like the nonwoven fabric of Example 8. Specifically, the nonwoven fabric of Comparative Example 15 did not show much improvement in tear strength compared with the original nonwoven fabric of Comparative Example 14, but the nonwoven fabric of Example 9 had a tactile feel compared to the original nonwoven fabric of Comparative Example 14 And the reduction of fracture strength was also suppressed.

As is apparent from the results shown in Table 7, the nonwoven fabric of Example 10 was also a nonwoven fabric having improved tactile feel and reduced breaking strength, like the nonwoven fabric of Example 8. Specifically, the breaking strength of the nonwoven fabric of Comparative Example 17 was not lowered than that of the original nonwoven fabric of Comparative Example 16, but the improvement of the tactile feeling was not observed. Only the nonwoven fabric of Example 10 was improved in touch compared to the original nonwoven fabric of Comparative Example 16 And the reduction of the breaking strength was also suppressed.

According to the nonwoven fabric of the present invention, even though the breaking strength is high, the overall feel is soft and the feel is improved. Further, according to the nonwoven fabric of the present invention, since the number of the loop-shaped fibers is small, it is hard to be caught on the skin, and the feel is improved.

Further, according to the method for producing a nonwoven fabric of the present invention, a nonwoven fabric in which the constituent fibers are worn with good touch is obtained, and a nonwoven fabric obtained by reducing the deterioration of the nonwoven fabric breaking strength of the obtained woven nonwoven fabric is obtained. Further, according to the nonwoven fabric manufacturing method of the present invention, the nonwoven fabric in which the constituent fibers are woven is obtained, and the manufacturing speed is fast and the cost is reduced.

Claims (24)

Wherein a part of the long fibers is broken and only one end portion is fixed by the heat fusion portion and the other end portion of the nonwoven fabric is fixed on the other end portion side Wherein the nonwoven fabric has fibers having a free end portion thickened. The method according to claim 1,
Wherein the fiber having a free end portion of increased thickness has an increasing ratio of the fiber diameter of the end portion of 15% or more. 3. The method according to claim 1 or 2,
Wherein the fibers are fixed at one end only by the heat-sealed portion, and the ratio of the fiber having the free end portion is 20% or more. 3. The method according to claim 1 or 2,
Like fibers having loop-shaped fibers rising between the heat-sealed portions, wherein the loop-shaped fibers and the total number of fibers in which only one end portion is fixed by the heat-sealed portion, the ratio of the loop- Less than% nonwoven. 3. The method according to claim 1 or 2,
Wherein the fibers constituting the nonwoven fabric have a fiber diameter dispersion degree of 0.33 to 100. 3. The method according to claim 1 or 2,
Wherein the nonwoven fabric is formed on the basis of a spunbonded nonwoven fabric or a laminated nonwoven fabric comprising a spunbond layer and a meltblown layer. The method according to claim 6,
Wherein the spunbonded nonwoven fabric or the laminated nonwoven fabric of the spunbond layer and the meltblown layer is made of a polypropylene resin containing not less than 5% by weight of an ethylene propylene copolymer resin or not less than 25% by weight of a recycled polypropylene resin. The method according to claim 6,
Wherein the spunbonded nonwoven fabric comprises a softening agent. The method according to claim 6,
Wherein the nonwoven fabric is formed on the basis of the laminated nonwoven fabric of the spunbond layer and the meltblown layer, the spunbond layer of the laminated nonwoven fabric comprises a plurality of layers,
Wherein the spunbond layer comprises fibers in which a part of the long fibers is broken so that only one end portion is fixed by the heat fusion portion and the free end portion on the other end side is thick. 3. The method according to claim 1 or 2,
Wherein a compression property value at a minute load is 18.0 (gf / cm2) / mm or less, a breaking strength value in the CD direction is 5.00 N / 5 cm or more, and a basis weight is 5 to 25 g / m2. 3. The method according to claim 1 or 2,
Wherein the average fiber diameter of the brushed fibers is smaller than the average fiber diameter of the surface fibers of the non-brushed portions of the same surface. 3. The method according to claim 1 or 2,
A nonwoven fabric having a bristle fiber of 8 / cm or more and a bristle height of 1.5 mm or less. 3. The method according to claim 1 or 2,
Wherein a portion of the long fibers is broken at the periphery of the heat-sealed portion. delete An absorbent article using the nonwoven fabric according to claim 1 as a constituent member. Wherein a plurality of portions of the nonwoven fabric are subjected to partial stretching at a temperature of 50 DEG C or lower and brass processing is carried out to wring the constituent fibers of the nonwoven fabric to the partially drawn nonwoven fabric. 17. The method of claim 16,
Wherein the partial stretching process is a process of stretching each of the plurality of portions of the nonwoven fabric at a mechanical stretch ratio of 1.05 to 20 times. 18. The method according to claim 16 or 17,
And performing stretching in each of the plurality of portions of the nonwoven fabric in the direction perpendicular to the carrying direction and the carrying direction by the partial stretching process. 18. The method according to claim 16 or 17,
The partial stretching process is carried out using a pair of concave-convex rolls,
One of the rolls has a plurality of convex portions on the circumferential surface and the other roll has a concave portion in which the convex portion is inserted at a position corresponding to the convex portion of one of the rolls on the circumferential surface,
Wherein the nonwoven fabric is fed between a pair of the uneven rolls, and the partial stretching process is performed on the nonwoven fabric. 20. The method of claim 19,
Wherein the pair of uneven rolls are subjected to the partial stretching process at a portion of 10% to 80% of the total area of the supplied nonwoven fabric. 20. The method of claim 19,
Wherein a relationship between a feeding speed (V1) when the nonwoven fabric is fed between the pair of uneven rolls and a main speed (V2) of a pair of the uneven rolls is V1 > V2. 18. The method according to claim 16 or 17,
The brushed work is carried out using a convex roll having a plurality of convex portions on the circumferential surface,
The rotating direction of the convex roll is rotated in a direction opposite to the conveying direction of the nonwoven fabric,
Wherein the relationship between the conveying speed (V3) of the nonwoven fabric subjected to the partial stretching process and the main speed (V4) of the convex roll is V4 / V3 = 0.3 to 10. 18. The method according to claim 16 or 17,
Wherein the nonwoven fabric has a total draw ratio of 1.3 to 4.0. 20. The method of claim 19,
Wherein the original nonwoven fabric has a thermocompression bonding portion which is regularly dispersed in a plane direction,
Wherein the ratio of the pitch of the thermocompression bonding portion to the pitch of the convex portions of one pair of the concave-convex rolls (pitch / convex portion pitch of the thermocompression bonding portion) is 0.05 to 0.7.

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