JP6527362B2 - Composite non-woven fabric - Google Patents

Description

  The present invention relates to a composite non-woven fabric in which a papermaking web is integrally laminated on one side of a long-fiber non-woven fabric.

  Since a wet non-woven fabric obtained by wet sheet-forming using so-called short cut fibers or pulp fibers having a fiber length of less than 10 mm uses a slurry in which the fibers are sufficiently uniformly suspended when forming a sheet, spotted spots are small. , A well-formed non-woven fabric is obtained. Such a wet non-woven fabric may be inferior in strength because the fiber length of constituent fibers is short. Therefore, in order to compensate for the strength of the wet non-woven fabric, for example, a technique of combining other non-woven fabrics has been proposed.

  Patent Document 1 discloses a non-woven fabric formed by laminating a papermaking non-woven fabric and a heat-fusible fiber non-woven fabric and laminating and integrating them by heat embossing.

  Further, Patent Document 2 discloses a non-woven fabric in which a wet web and a long-fiber non-woven fabric as a reinforcing support are integrated by performing a hydroentanglement process.

JP 11-291 377 publication Japanese Patent Application Publication No. 2003-41472

The inventor has developed a polyester non-woven fabric having a special cross-sectional shape (Japanese Patent Application Laid-Open No. 2013-76182). This is a non-woven fabric having polyester filaments as constituent fibers, and the cross-sectional shape of the polyester filaments is connected vertically and horizontally at the lower end of the substantially Y-shape

It is a polyester nonwoven fabric characterized by having a shape. Such polyester non-woven fabric has the property of high rigidity.

  The present inventor has conducted various studies using this polyester non-woven fabric, and when a web comprising short-cut fibers having the same cross-sectional shape is laminated on one side of this polyester non-woven fabric by a wet sheet-forming method, the surface is uniform. However, it has been found that a nonwoven fabric having high rigidity and high bulk can be obtained. The present invention is based on such findings. Therefore, an object of the present invention is to obtain a nonwoven fabric having high rigidity and bulkiness while having a uniform surface.

The present invention achieves the above object, and
A composite non-woven fabric in which a paper-making web obtained by a wet paper-making method is laminated on one side of a long-fiber non-woven fabric,
The cross-sectional shape of the long fibers constituting the long-fiber non-woven fabric is connected vertically and horizontally at the lower end of the substantially Y-shape

In the shape (hereinafter referred to as “substantially Y4 shape”), the single fiber fineness is 10 dtex or more,
A gist of a composite non-woven fabric characterized in that the papermaking web is composed of a modified cross-section fiber having a cross-sectional shape of substantially Y4 and a single fiber fineness of 10 dtex or more.

  Hereinafter, the present invention will be described in detail.

  The composite nonwoven fabric of the present invention is formed by laminating a papermaking web by a wet papermaking method on one side of a long-fiber nonwoven fabric, and the two layers are compositely integrated.

  The long-fiber non-woven fabric in the present invention is characterized by the cross-sectional shape of its constituent fibers. This cross-sectional shape has four substantially Y-shapes as shown in FIG. And it connects with the lower end 1 of a substantially Y-shape vertically and horizontally, and it has become a substantially Y4 shape as shown in FIG. In addition, high rigidity is achieved by the substantially approximately + character portion 5 at the center and the four approximately V-shaped portions 6 connected to each tip of the substantially + character portion 5. That is, the rigidity is further enhanced by the combination of the substantially rigid + -shaped portion 5 and the substantially V-shaped portion 6 instead of a simple deformed shape such as a hexagon or a Y-shape. In addition, the ratio of the location where no fiber is present in a given area, that is, the area ratio where fibers do not exist when viewed two-dimensionally, is large because the degree of deformation of long fibers and the fineness are also 10 dtex or more. In addition, the individual areas of the portions where there are no fibers (voids of the long-fiber non-woven fabric) become large. The fiber suspension (slurry) is placed on the long fiber non-woven fabric by forming a large area ratio where the area ratio where no fiber is present and where the fibers are not present (voids of the long fiber non-woven fabric) When dewatering, it is possible to obtain a composite non-woven fabric having good drainage and high uniformity. In addition, during papermaking to dewatering, some of the fibers constituting the papermaking web may intrude into the voids of the long-fiber non-woven fabric. In addition, since the individual area of the location where the fiber in a long fiber nonwoven fabric does not exist is large, it is also called a "hole."

  A long fiber non-woven fabric in which the cross section used in the present invention is composed of long fibers in a substantially Y4 shape will be described below. Basically, it is preferable to use the long-fiber non-woven fabric described in the above-mentioned JP-A-2013-076182 proposed by the present applicant.

  The long-fiber non-woven fabric is preferably one in which the constituent fibers are integrated by heat adhesion from the viewpoint of rigidity and form stability, and the constituent fibers are made of a thermoplastic polymer and have excellent mechanical strength and rigidity. It is preferable that it is a polyester-type polymer from what it can do. The long fibers (polyester long fibers) composed of a polyester polymer may consist of one kind of polyester, but it is preferable to combine a low melting point polyester and a high melting point polyester. That is, it is preferable to adopt a composite type in which the substantially V-shaped portion 6 of the cross-sectional shape of the polyester long fiber is formed of a low melting point polyester and the substantially + portion 5 is formed of a high melting point polyester. This is because, after accumulating the composite type polyester long fibers, the low melting point polyester is softened or melted and then solidified to obtain a non-woven fabric in which the polyester long fibers are fused by the low melting point polyester.

The long-fiber non-woven fabric is obtained by a conventionally known method except for changing the nozzle holes used in melt spinning. That is, in the method of manufacturing long fiber non-woven fabrics by accumulating long fibers obtained by melt spinning a thermoplastic polymer, the shape of the nozzle holes used in melt spinning is connected vertically and horizontally at the lower end of the Y character And / adjacent to each other and / \ parallel to each other

The shape (hereinafter referred to as "Y4 type") is used.

  This nozzle hole has four Y-shapes shown in FIG. And it connects to the upper and lower sides and right and left by lower end 7 of Y character, and it has become Y4 form shown in FIG. In this Y4 shape, adjacent Y-shaped / 8, 8 are parallel, and \ 9, 9 are parallel. By feeding a thermoplastic resin to the Y4 nozzle holes and melt spinning, it is possible to obtain long fibers having a substantially Y4 cross section. In particular, by making / 8, 8 comands and \ 9, 9 comrades of adjacent Y character into parallel, the long fiber which has four crevices 2 can be obtained. In addition, it is possible to obtain a long fiber having a substantially + -shaped portion 5 and a substantially V-shaped portion 6 provided at the tip of each.

  The thermoplastic polymers to be supplied to the Y4 nozzle holes may be of one type or of two types. In particular, it is preferable to use two types of low melting point polyester resin and high melting point polyester resin. That is, it is preferable to supply a low melting point polyester resin to the Y-shaped V-shaped portion 10 and to supply a high melting point polyester resin to the Y-shaped + shaped portion 11. By melt-spinning in this supply mode, a composite type polyester long fiber in which the substantially V-shaped portion 6 is formed of the low melting point polyester and the substantially + shaped portion 5 is formed of the high melting point polyester is obtained.

  After the long fibers are obtained, they are collected to form a fibrous web in general. Then, by at least heating the fiber web, the thermoplastic polymer (a polymer having a low melting point when composed of two types of polymers) constituting long fibers is softened or melted, cooled and solidified. Thus, the long fibers are thermally bonded to obtain a long fiber non-woven fabric. The heat bonding may be performed by partially heat-pressing by heat embossing, heat bonding by heat treatment by heat calendering, or heat bonding by hot-air treatment. Moreover, what combined these methods may be used. In the present invention, from the viewpoint of the form stability of the long-fiber non-woven fabric, heat embossing in which heat and pressure are applied by applying heat and pressure partially is preferable. The pressure bonding area ratio (area ratio of projections of the embossing roll) of the embossing roll to be used is preferably 15 to 45%.

  In the present invention, the single fiber fineness of the constituent fibers of the long fiber non-woven fabric is 10 dtex or more in consideration of the rigidity. Further, although depending on the basis weight of the non-woven fabric, the single-fiber fineness is preferably 15 dtex or more, since the area ratio of the portion where no fiber is present becomes larger when viewed two-dimensionally in the long-fiber non-woven fabric. The larger the single fiber fineness, the better the rigidity tends to be. However, when obtaining a long fiber non-woven fabric, the upper limit is set to 30 dtex in consideration of stretchability and spinnability.

Basis weight of the long-fiber nonwoven fabric is preferably from 20 to 60 g / ^{m 2,} depending on the single fiber fineness, more preferably 30 to 50 g / ^{m 2.} By setting the weight per unit area, since the long-fiber non-woven fabric has many voids and high rigidity, it has good water loss in the wet sheet-forming process, and becomes a web having a uniform surface in the sheet-formed web. Even in the commercially available spunbond non-woven fabric (having a single yarn fineness of less than 10 dtex), there are some openings if the fabric weight is small (about 20 g / m ^{2 or} less), but such spunbond Non-woven fabric has no rigidity and is inferior in form stability, so it can not withstand the weight when carrying a fiber suspension in the process of producing a composite non-woven fabric, so the trace of the wire net eye is May stick to non-woven fabric. Further, in such non-woven fabric, when the fabric weight exceeds 20 g / m ² , the ratio of the location where no fiber is present and the area of the location become extremely small, so the water leakage becomes even worse.

  In the present invention, the fibers constituting the papermaking web are modified cross-section fibers having a cross-sectional shape of about Y4 and a single fiber fineness of 10 dtex or more. That is, the constituent fibers of the papermaking web also have the same cross-sectional shape as the constituent fibers of the long-fiber non-woven fabric described above, and the denier is as large as 10 dtex or more. Therefore, the constituent fibers of the papermaking web, like the long fibers, have high rigidity because they have a specific cross section. Since the gaps between the constituent fibers are large and the bulkiness is excellent, and the fibers themselves have high rigidity, the voids are unlikely to be crushed by an external force, and the bulkiness is maintained.

  A short cut fiber having a fiber length of about 2 to 10 mm is used as a constituent fiber of the papermaking web. Also, in order to facilitate dispersion in water, no crimp such as mechanical crimp is applied to the fiber, and since it is in the form of a straight with no crimp, the shape of the special variant cross section is maintained without deformation. The effects resulting from the atypical cross section can be efficiently exhibited.

  The substantially Y4 shaped shortcut fiber constituting the papermaking web is also composed of a thermoplastic polymer, but is preferably composed of polyester because it is excellent in mechanical strength and excellent in rigidity, and in particular by polyethylene terephthalate. More preferably, it is configured.

  In producing such a substantially Y4 shaped shortcut fiber, it can be obtained by a conventionally known method except for changing the nozzle hole. Moreover, it is good for the nozzle hole to use the Y4 shaped nozzle hole shown in FIG. 4 similar to the above-mentioned long fiber non-woven fabric.

  The papermaking web may be mixed with natural pulp such as softwood pulp and hardwood pulp, synthetic pulp such as polyethylene and polypropylene, and the like as long as the object of the present invention is achieved, in addition to the substantially Y4 shaped shortcut fiber. Further, the papermaking web preferably contains a binder for bonding and integrating the constituent fibers. As such a binder, a thermoadhesive fiber constituted by a thermoplastic polymer which is melted by heat and functions as a thermal adhesive, a vinylon binder fiber which is dissolved by hot water and functions as an adhesive, and the like can be mentioned. In the case of using a heat-bonded fiber, in consideration of adhesive strength, it is preferable to use one having a thermoplastic resin having compatibility with a constituent fiber of a papermaking web or a constituent polymer of a long fiber nonwoven fabric as a binder component. Among them, a core-sheath type heat-bonded fiber which is a polyester-based heat-bonded fiber and whose sheath component is a heat-bonded component can be preferably used.

The basis weight of the papermaking web may be appropriately set according to the application and required performance of the composite non-woven fabric, and is preferably about ²⁰ to 200 g / m ² .

  The composite nonwoven fabric of the present invention can be obtained by the following method.

  First, a fiber suspension to be a raw material of a papermaking web is prepared. A short Y-shaped shortcut fiber which is a constituent fiber of a papermaking web, an adhesive fiber to be an adhesive agent, and a dispersing agent, etc., if necessary, are charged into water and disintegrated to prepare a uniform dispersion. In addition, in order to prevent the fibers from being entangled and the fibers being damaged by a long time disaggregation operation, it is preferable to carry out the disaggregation in as short a time as possible. In this process, fiber bundles are eliminated as much as possible and dispersed in a single fiber form. The disaggregated fiber dispersion is diluted as needed under mild agitation, and by appropriately adding a viscosity improver such as a high molecular weight polyacrylamide solution, polyethylene oxide solution, etc., the fibers in a uniformly dispersed state are suspended. Prepare a suspension (slurry). In the case of using fibers which are easily disintegrated and in which water and fibers are mixed at the raw material stage, it is preferable to disperse only by stirring.

  The obtained fiber suspension may be hand-made, but to efficiently obtain it, use a paper machine having at least one of machine-made circular nets, long nets, narrow nets and inclined type wires, It is good to make a papermaking web. At this time, the non-woven fabric composed of the long fibers of the substantially Y4 cross section described above is placed on the wire, and the fiber suspension as the raw material of the papermaking web is placed on the long-fiber non-woven fabric. When the fiber suspension is flowed over the long fiber non-woven fabric on the wire, the water in the fiber suspension flows downward from the pores of the long fiber non-woven fabric and the eyes of the wire, and the water containing paper is formed on the long fiber non-woven fabric Web stuff remains. At this time, if there is no appropriate void (pore) in the long fiber non-woven fabric, the water in the suspension will remain on the long fiber non-woven fabric, and the production efficiency will be very poor. In addition, when the long-fiber non-woven fabric is inferior in rigidity, the form retention is inferior, and the trace of the wire under the long-fiber non-woven fabric is imparted. In the present invention, since a non-woven fabric composed of long fibers having a specific substantially Y4 cross section is used, it is possible to efficiently flow water from appropriate gaps formed between long fibers, and a paper-made web is configured. Some of the fibers intrude into the voids of the long-fiber non-woven fabric and are well integrated. In addition, since the long-fiber non-woven fabric used in the present invention is excellent in rigidity and shape stability, it can be manufactured without using a fine-grained wire for receiving a fiber suspension in the related art.

  The laminate comprising the long fiber non-woven fabric and the papermaking web material on the non-woven fabric is transferred to the next step (pressing step, drying and heat treatment step) to remove water in the material and dried to obtain a composite non-woven fabric. be able to. At this time, when a heat bonding fiber or vinylon bider fiber is used as an adhesive in the papermaking web, the heat bonding component is melted in the case of the heat bonding fiber by being heated in the drying step in the water-containing state. Alternatively, it softens and functions as a thermal adhesive, and in the case of vinylon binder fiber, vinylon fiber dissolves to function as an adhesive, and the shortcut fibers constituting the papermaking web are adhered to each other via the adhesive. As a result, the long fibers and the short cut fibers present at the interface between the long fiber non-woven fabric and the papermaking web adhere to each other, and the two layers are integrated. When a heat-bonded fiber is used, the set temperature in the drying step may be set to a temperature at which the thermoplastic polymer functioning as a heat adhesive melts or softens.

  The two layers of the long fiber non-woven fabric and the papermaking web may be bonded, for example, via a heat adhesive. For example, a long fiber non-woven fabric in which a heat adhesive such as powder is dispersed in advance and melted and integrated may be used, or a spider web-like heat adhesive sheet may be laminated on one side of long fiber non-woven fabric It is also good. A long fiber non-woven fabric to which such a heat adhesive is applied or a long fiber non-woven fabric obtained by laminating a heat adhesive sheet is placed on a wire and made into paper in a papermaking process, and then the heat adhesive is melted and used as an adhesive It may be dried and integrated at a working temperature. In the drying step, a heated flat roller, a Yankee dryer, a hot air dryer or the like may be used, but since the cross-sectional shape of the fibers is hardly deformed and can be maintained well, the hot air dryer which Preferably, air through is used.

  The composite non-woven fabric obtained is a composite of a long-fiber non-woven fabric and a paper-made web, and since both the long-fiber non-woven fabric and the constituent fibers of the paper-formed web are made of fibers having a specific Y4 cross-sectional shape, The long-fiber non-woven fabric has rigidity and stiffness, and the paper-made web also has high rigidity while having high bulk, and the web surface exhibits a uniform surface morphology characteristic of the paper-formed sheet. The composite non-woven fabric of the present invention is rigid and is unlikely to be deformed by an external force despite large voids between fibers, and maintains bulkiness, so various filters, filter substrates, filter reinforcing materials, agricultural materials, building materials It can be suitably used as a wiping cloth, a wiping cloth material or the like.

  The composite nonwoven fabric of the present invention is formed by laminating a papermaking web having shortcut fibers of a substantially Y4 cross-sectional shape as constituent fibers on one side of a non-woven fabric composed of long fibers of a substantially Y4 cross-sectional shape. According to the present invention, by using the specific long-fiber non-woven fabric, the long-fiber non-woven fabric and the paper-made web can be favorably combined and integrated in the process of producing the paper-made web by the wet sheet-making method. And, the composite nonwoven fabric can be easily obtained. In addition, the obtained composite non-woven fabric is provided with rigidity by the long-fiber non-woven fabric and shape stability, and has both rigidity by the paper-made web and bulk retention which is not easily deformed.

EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples. In addition, each characteristic value in an Example was calculated | required as follows.
(1) Relative viscosity of polyester [.eta..sub.rel] A sample of 0.5 g was dissolved in 100 cc of a mixed solvent of equal mass ratio of phenol and ethane tetrachloride, and measured at 20.degree.
(2) Melting point (° C.): Measured at a temperature rising rate of 20 ° C./minute using a differential scanning calorimeter DSC-7 type manufactured by Perkin Elmer.

[Preparation of long fiber non-woven fabric]
Production Example 1 of Long Fiber Nonwoven Fabric
It copolymerizes using 92 mol% of terephthalic acid (TPA) and 8 mol% of isophthalic acid (IPA) as a dicarboxylic acid component, and 100 mol% of ethylene glycol (EG) as a diol component, and low-melting-point polyester (relative viscosity [eta rel] 1. 44, melting point 230 ° C.). To this low melting point polyester, 4.0% by mass of titanium oxide was added as a crystal nucleating agent to prepare a low melting point polyester polymer. On the other hand, it is copolymerized using 100 mol% of terephthalic acid (TPA) as a dicarboxylic acid component and 100 mol% of ethylene glycol (EG) as a diol component, and a high melting point polyester polymer (polyethylene terephthalate, relative viscosity [.eta. Prepared at 260 ° C. Then, using the nozzle holes shown in FIG. 4, a low melting point polyester polymer is supplied to the V-shaped portion, a high melting point polyester polymer is supplied to the + shaped portion, and the spinning temperature is 285 ° C. Melt spinning was performed at 33 g / min. The mass ratio of the supply amount of the low melting point polyester polymer to the supply amount of the high melting point polyester polymer was 1: 2.

The filament group discharged from the nozzle hole was introduced into an air sucker inlet 2 m below, and pulled so that the fineness of the composite polyester long fiber became 16.5 dtex. The composite type polyester long fibers discharged from the air soccer outlet were opened by an opening device, and then accumulated on a moving net conveyor to obtain a fiber web. This fiber web is made up of an emboss roll having a surface temperature of 213 ° C. (the area of the tip of each emboss convex portion is 0.7 mm ² and the area ratio of the emboss convex portion to the total roll area is 15%); It was introduced into a heat embossing device consisting of a flat roll, and heat fusion was carried out under the condition of a linear pressure of 300 N / cm between both rolls to obtain a polyester long fiber nonwoven fabric with a basis weight of 40 g / m ² and a thickness of 0.34 mm.

Production Example 2 of Long Fiber Nonwoven Fabric
In Production Example 1 of the long fiber non-woven fabric described above, melt spinning using a round core-sheath type composite spinneret with a hole diameter of 0.3 mm and spinning conditions with a single hole discharge rate of 1.67 g / min Similarly, a polyester long-fiber non-woven fabric having a basis weight of 40 g / m ² and a thickness of 0.21 mm and having a single yarn fineness of 3.3 dtex was obtained.

Production Example 3 of Long Fiber Nonwoven Fabric
A polyester long fiber non-woven fabric having a thickness of 0.10 mm was obtained in the same manner as in Production Example 2 of the long fiber non-woven fabric, except that the fabric weight was 15 g / m ² .

[Preparation of shortcut fiber]
Prepare polyethylene terephthalate (relative viscosity [.eta.rel] 1.38, melting point 260.degree. C.), and melt spin it at a spinning temperature of 285.degree. C. and single hole discharge rate of 6.67 g / min using the nozzle holes shown in FIG. It took over at a speed of 1000 m / min. The undrawn yarn thus taken is drawn at a drawing temperature of 140 ° C., and subjected to tension heat treatment with a heat roller to give a dispersion oil agent and then cut to a cross-sectional shape with a single fiber fineness of 16.5 dtex and a fiber length of 5 mm. There is a shortcut fiber of approximately Y4 shape.

[Method of producing composite non-woven fabric]
Example 1
A long fiber having a substantially Y4 cross-sectional shape obtained in Production Example 1 of long fiber non-woven fabric on the entire surface of a container bottom of a paper making device (having wires attached in a grid shape) using a tapping machine having an area of 500 cm ² for paper making. The non-woven fabric comprising the above was placed, and 12500 cc of water was introduced.
Also, on the other hand, a fiber suspension was prepared. The short-cut fiber having a cross-sectional shape of approximately Y4 and the core-sheath type polyester-based heat-bonded fiber (product name "Merty 4080" single fiber fineness 3 dtex, fiber length 5 mm) are used as the heat-bonded fiber. The mixture ratio of approximately Y4 type short cut fiber / heat bonding fiber was set to 80/20, and the mixture was charged into a pulp disintegrator and stirred at 3000 rpm for 2 minutes to obtain a fiber suspension.

  The obtained fiber turbid solution is put into a container of a paper-making apparatus in which a long-fiber non-woven fabric is installed, stirred for 1 minute using a perforated plate mixer, and then the drainage valve at the bottom of the paper-making apparatus is opened for 3 minutes. I drained water. Next, the laminate in which the web-made web material is placed on the long fiber non-woven fabric is taken out from the paper-making container, put into a hot air dryer set at 130 ° C., subjected to heat treatment for removing moisture and heat bonding. I got a non-woven fabric. The composite non-woven fabric obtained was excellent in rigidity and shape stability and very bulky. In addition, drainage in the manufacturing process was good.

Comparative Example 1
In Example 1, except that the long-fiber non-woven fabric obtained in Production Example 2 of long-fiber non-woven fabric was used as the long-fiber non-woven fabric, the paper was made in the same manner as in Example 1, and the drainage valve was opened to drain water. However, the voids of the long-fiber non-woven fabric are too small to allow water to escape under the long-fiber non-woven fabric, and the water accumulates between the papermaking web material and the long-fiber non-woven fabric, and water can not be removed well. As a result, the uniform dispersibility of the papermaking web material gradually worsens, and a composite nonwoven fabric can not be obtained efficiently.

Comparative example 2
In Example 1, a long-fiber non-woven fabric was produced in the same manner as in Example 1 except that the long-fiber non-woven fabric obtained in Production Example 3 of long-fiber non-woven fabric was used as the long-fiber non-woven fabric. Although it was a long-fiber non-woven fabric with a low fiber weight, water did not flow under the long-fiber non-woven fabric, and water accumulated between the papermaking web material and the long-fiber non-woven fabric. It could not be done and could not obtain composite nonwoven fabric efficiently. In addition, since there is no rigidity of the long fiber non-woven fabric, a trace of the wire net at the lower part of the container is attached, and the long fiber non-woven fabric can not serve even as a reinforcing material.

It is the figure which showed one substantially Y shape of the substantially Y4 shape which is a cross-sectional shape of the long fiber or shortcut fiber in this invention. It is the figure which showed the substantially Y4 shape which is a cross-sectional shape of the long fiber or shortcut fiber in this invention. It is the figure which showed one Y-shape of the nozzle hole of Y4 shape for obtaining the long fiber or shortcut fiber in this invention. It is the figure which showed the Y4 shaped nozzle hole for obtaining the long fiber or shortcut fiber in this invention.

DESCRIPTION OF SYMBOLS 1 fiber Y cross-sectional shape of one substantially Y-shaped lower end 2 recessed portion formed by approximately Y 4 shape 3 convex portion formed by approximately Y 4 shape 4 small recess 5 formed by approximately Y 4 shape approximately Y 4 The substantially cross portion 6 in the shape The substantially V-shaped portion 7 in the substantially Y4 shape The lower end 8 of the lower end 8 of the Y-shaped one Y-shaped Y-shape which is the shape of the nozzle hole at the time of melt spinning
9 Y character \
10 Y4 V-shaped part 11 Y4 cross part

Claims (6)

A composite non-woven fabric in which a paper-making web obtained by a wet paper-making method is laminated on one side of a long-fiber non-woven fabric,
The cross-sectional shape of the long fibers constituting the long-fiber non-woven fabric is connected vertically and horizontally at the lower end of the substantially Y-shape

In the shape (hereinafter referred to as “substantially Y4 shape”), the single fiber fineness is 10 dtex or more,
A composite nonwoven fabric characterized in that the papermaking web is formed of a modified cross-section fiber having a cross-sectional shape of substantially Y4 and a single fiber fineness of 10 dtex or more. The composite non-woven fabric according to claim 1, wherein the long-fiber non-woven fabric and the paper-making web are formed integrally on the long-fiber non-woven fabric by heat bonding and then laminated and integrated. The papermaking web contains heat-adhesive fibers, and by melting or softening the heat-bonding component of the heat-adhesive fibers, the constituent fibers of the paper-making web adhere and integrate, and the long-fiber non-woven fabric and the paper-making web adhere integrally The composite nonwoven fabric according to claim 1 or 2, characterized in that Composite nonwoven fabric of any one of claims 1 to 3, wherein the basis weight of the long-fiber nonwoven fabric is 20 to 60 g / ^{m 2.} The composite non-woven fabric according to any one of claims 1 to 4, wherein the long-fiber non-woven fabric is partially thermocompression-bonded by heat embossing and retains its form as a long-fiber non-woven fabric. The long fibers constituting the long fiber non-woven fabric are characterized by being composite type polyester long fibers in which each substantially V-shaped portion of substantially Y4 shape is made of low melting point polyester and the other substantially + character portion is made of high melting point polyester. The composite nonwoven fabric according to any one of claims 1 to 5.

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