TWI343430B - - Google Patents

Description

1343430 (1) Description of the Invention [Technical Field of the Invention] The present invention relates to a method of manufacturing a nonwoven fabric and a nonwoven fabric. [Prior Art] In the past, non-woven fabrics have been widely used in various fields such as sanitary diapers such as disposable diapers and sanitary napkins, cleaning products such as dust-removing papers, and medical supplies such as masks. Such non-woven fabrics are used in various fields, and in fact, when applied to products in various fields, they must be manufactured into appropriate properties and structures in accordance with the use of each product. The nonwoven fabric is produced by, for example, forming a fiber layer (web) by a dry method or a wet method, and bonding the fibers in the fiber layer to each other by a chemical bonding method or a thermal bonding method. In the process for bonding the fibers constituting the fiber layer, a method of applying a physical force to the fiber from the outside by a method of repeatedly puncturing a plurality of knitting needles through the fiber layer, a method of spraying a water stream, or the like can be used. However, these methods are merely entanglement of the fibers with each other, and the orientation, arrangement or shape of the fiber layers of the fibers of the fiber layer cannot be adjusted. That is, these methods can only produce a sheet-like nonwoven fabric. A non-woven fabric with an opening has been proposed. For example, Japanese Laid-Open Patent Publication No. Hei 6-3 3 0443 discloses a method in which a non-woven fabric is held between a male mold having a projection such as a needle protruding from the outside and a support member on the storage side in which the projection is accommodated. The protruding portion penetrates the non-woven fabric to form a three-dimensional opening in the non-woven fabric. -5- (2) (2) 1343430 [Summary of the Invention] However, the non-woven fabric is formed by holding a fiber assembly (constituting a non-woven fabric) between the protruding portion and the support on the storage side, thereby forming irregularities or openings. Therefore, problems occurring in the conventional nonwoven fabric include, for example, the fibers of the entire wall portion of the convex portion or the periphery of the opening are compressed to cause the fiber density to increase. Then, when the heating is not formed, the film is thinned. The fiber density of the entire wall portion of the convex portion or the periphery of the opening is increased, and the nonwoven fabric after the film formation is formed, and the opening is not easily deformed even if an external pressure is applied. One of the reasons is that the erected pieces of woven fabric that are pierced by the needles are not easily fallen. When such a nonwoven fabric is used for a surface sheet or the like of an absorbent article, there is a tendency that the liquid does not easily penetrate downward. When a large amount of liquid occurs in the periphery of the convex portion or the opening, the liquid may stay in the non-woven fabric to contaminate the skin of the user or the like, or cause an uncomfortable feeling. SUMMARY OF THE INVENTION An object of the present invention is to provide a non-woven fabric in which irregularities or openings are formed, and in order to prevent the fiber density of the convex portion or the concave portion from being excessively high, only a partial region of the peripheral edge of the opening is formed to have a high density. The inventors of the present invention have found that the fiber web supported by the predetermined mesh supporting member on the lower side is blown from the upper side to move the fibers constituting the fiber web, whereby the opening or the periphery of the opening can be locally densified. The completion of the present invention is achieved. According to the first embodiment of the present invention, the nonwoven fabric includes a plurality of openings formed in the first direction, and is viewed as a region near the side edge of the opening as viewed in a second direction orthogonal to the first direction. -6-(3) 1343430 provided one side edge portion, and the side edge portion is provided with the opening portion, and the other side edge portion is provided with another region near the side edge of the mouth portion. The density is higher than the other side edge. According to a second embodiment of the present invention, in the first embodiment, the fiber area per unit weight of the one side edge portion is smaller than the other side edge of the third embodiment of the present invention, in the non-woven fabric according to the first embodiment. The fiber density ratio of the first connecting portion 1 connecting portion between the first opening portion and the second opening portion adjacent to the plurality of openings and the first connecting portion 1 formed by the fibers between the front opening portion and the second opening portion The aforementioned first opening portion is further higher. According to a fourth aspect of the invention, in the third embodiment, the content of the fibers in the direction of the alignment in the one side edge portion of the second opening portion is higher than the fiber ratio in the second direction. According to a fifth embodiment of the present invention, in the nonwoven fabric according to the third embodiment, the content of the fibers in the first connecting portion is more than the fiber in the first direction. According to a sixth embodiment of the present invention, in the non-woven fabric according to any one of the third embodiment, the first connecting unit area weight is larger than the first opening, and the other side of the invention is The seventh embodiment is characterized in that, in the non-woven fabric according to any one of the third embodiment, the nonwoven fabric portion is higher in the above-mentioned one. Or the arrangement of the second actual portion is described as the first opening, and the non-woven fabric of the first side edge portion or the fiber portion of the fourth embodiment having the second direction and the second direction is higher. The opening of the sixth opening (4) (4) 133430 is located on the opposite side of the second opening and adjacent to the first opening, and the first opening and the first opening 3. The second connecting portion formed by the fibers between the openings, wherein the second connecting portion has a higher fiber density than the other side edge portion of the first opening. In the nonwoven fabric according to the seventh aspect of the present invention, the one side edge portion of the second opening portion and the one side edge portion of the first opening portion are mutually in the second direction. The one side edge portion of the third opening portion and the one side edge portion of the first opening portion are located on opposite sides of each other in the second direction; and the fiber density is higher than the other side edge portion The high region, that is, the one side edge portion of the second opening portion, the first connecting portion, the one side edge portion of the first opening portion, the second connecting portion, and the third opening portion The side edges form a continuous meandering shape. According to a ninth aspect of the present invention, in the nonwoven fabric according to the seventh aspect of the present invention, the first connecting portion has a fiber density of 0.05 g/cm3 or more, and the first opening portion and the first portion (2) or more times the fiber density of the other side edge portion of at least one of the openings; the fiber density of the second connecting portion is 〇.5g/cm3 or more, and the first opening portion and the first opening portion are The other side edge portion of at least one of the second openings has a fiber density of 1.1 times or more. According to a first aspect of the present invention, in the non-woven fabric according to any one of the seventh to the ninth embodiments, the fiber that is aligned in the first direction at the one edge of the third opening The content ratio is higher than the content of the fibers aligned in the second direction. -8- (5) (5) 1343430 The eleventh embodiment of the present invention is in the non-woven fabric according to any one of the seventh embodiment to the tenth embodiment, in the second connecting portion, in the second direction The content of the fibers in the alignment is higher than the content of the fibers in the first direction. The second embodiment of the present invention is in the non-woven fabric of any of the seventh embodiment to the eleventh embodiment. The second connecting portion has a weaving unit area that is heavier than the other side edge portion of the first opening portion. In the nonwoven fabric of any one of the seventh embodiment to the first embodiment, the fiber portion of the one side edge portion of the first opening portion is heavy and the second opening is The fiber unit area weight of the one side edge portion of the portion and the fiber unit area weight of the one side edge portion of the third opening portion are both 15 to 250 g/m 2 , and each of the first openings is the other one of the first openings The fiber unit area weight of the one side edge portion and the fiber unit area weight of the other side edge portion of the second opening portion are 1. 1 times the fiber unit area of the other side edge portion of the third opening portion. the above. According to a fourth aspect of the present invention, in the non-woven fabric according to any one of the first to third embodiments, the plurality of grooves extending in the first direction on one side of the nonwoven fabric, And a plurality of convex portions extending in the first direction so as to be adjacent to the plurality of groove portions on the one surface side, and the plurality of openings are formed along each of the plurality of groove portions. In the non-woven fabric according to any one of the first to fourth aspects, the plurality of openings are each substantially circular or substantially elliptical. -9- (6) (6) 133430 The first embodiment of the present invention is a nonwoven fabric comprising a density-changing region in which the fiber density is continuously or intermittently changed, and the density-changing region is provided along the non-woven fabric. The high-density area extending in the first direction is the same as the mechanical flow direction. According to a seventh aspect of the present invention, in the nonwoven fabric of the first aspect, the high-density region has a fiber density which is viewed from a second direction orthogonal to the first direction. The low c-shaped high-density area is counted in plural. The "C-shaped" system includes a form of "inverted C-shape". That is to say, the "high-density area of the C-shape" includes the "high-density area of inverted C-shape". The eighteenth embodiment of the present invention is in the first embodiment or the third embodiment! In the non-woven fabric described in the aspect, the high-density region includes a plurality of meandering high-density regions extending in a serpentine shape in the first direction. According to a nineteenth aspect of the present invention, in the nonwoven fabric according to any one of the first to eighth embodiments, the support member (portion through which the fluid can pass) supports the fiber assembly on one side thereof. The constituent fibers are in a state of having a degree of freedom. A non-woven fabric is formed by blowing a part of the fiber assembly by blowing a fluid mainly composed of a gas to the fiber assembly. According to the present invention, the non-woven fabric is formed of a non-woven fabric having irregularities or openings, and the fiber density of the convex portion or the concave portion is not excessively high, and only a partial region of the peripheral edge of the opening is formed to have a high density. -10- 1343430

[Embodiment] Figs. 1A and 1B are a plan view and a bottom view of a nonwoven fabric according to a first embodiment. Fig. 2 is a perspective sectional view showing the nonwoven fabric of the first embodiment. Figs. 3A and 3B are a plan view and a bottom view of the mesh supporting member of the first embodiment. Figure 4 is a perspective view of the fiber web. Fig. 5 is a side view for explaining the nonwoven fabric manufacturing apparatus of the first embodiment. Fig. 6 is a plan view for explaining the nonwoven fabric manufacturing apparatus of Fig. 5. Fig. 7 is an enlarged perspective view of a region Z of Fig. 5. Fig. 8 is a bottom view of the blowing portion of Fig. 7. Fig. 9A and Fig. 9B are a plan view and a bottom view of the nonwoven fabric of the second embodiment. Fig. 10 is a perspective sectional view showing the nonwoven fabric of the second embodiment. Fig. 1A and Fig. 1B are plan views and cross-sectional views of the nonwoven fabric of the third embodiment. Fig. 12A and Fig. 12B show examples of the use of the nonwoven fabric of the present invention. Fig. 13A and Fig. 13B show examples of the use of the nonwoven fabric of the present invention. Fig. 14 is a view showing an example of use of the nonwoven fabric of the present invention. Fig. 15A and Fig. 15B show examples of the use of the nonwoven fabric of the present invention. 1. Nonwovens of the Present Invention The nonwoven fabric of the present invention can be substantially realized by the following means. First, a predetermined mesh support member having a portion through which fluid can pass is prepared. One side of the fiber assembly is supported by the mesh supporting member to form a substantially sheet shape. When the constituent fibers of the substantially sheet-like fiber assembly have a degree of freedom, a fluid mainly composed of a gas is sprayed onto the other side of the fiber assembly. Thereby, the movement of the fibers is controlled to form a plurality of openings in the first direction, for example, the longitudinal direction (LD) in the longitudinal direction. Each of the plurality of openings -11 - (8) 1343430 has, for example, the following features. When viewed from the second direction which is positively intersecting with the first direction, that is, in the width direction (WD) of the lateral direction, the side edge portion of one of the vicinity of the side edge of the opening is a fiber density ratio as an opening portion. The other side of the side near the side is provided on the other side. The edge is higher. The longitudinal direction (LD) refers to the direction in which the non-woven fabric manufacturing machine sends the non-woven fabric or the web. The width direction (WD) is a direction orthogonal to the long side direction (LD). 2-First Embodiment A first embodiment of the nonwoven fabric of the present invention will be described with reference to Figs. 1A to 4 . Hereinafter, as shown in Fig. 1A, Fig. 1B, and Fig. 2, the groove portions 1a and 1b represent an example of the groove portion 1, and the convex portions 2a and 2b represent an example of the convex portion 2. The predetermined first opening 3a and the second opening 3b adjacent thereto in the longitudinal direction (LD) (hereinafter, the first opening 3a and the second φ opening 3b may be simply referred to as the opening 3a) 3 b ) represents an example of a plurality of openings 3 . 2-1. Shape As shown in Fig. 1A, Fig. 1B, and Fig. 2, the nonwoven fabric 1 1 6 ' of the present embodiment is configured by arranging a plurality of units in a row in which the groove portions 1 a and 1 b are one unit. That is, the non-woven fabric 116 has a plurality of groove portions la, lb extending on one side in the longitudinal (longitudinal) direction. The convex portions 2a, 2b are alternately formed between the groove portion 1a and the groove portion lb at substantially equal intervals and in parallel. -12 - 1343430

The nonwoven fabric 116 is formed in a longitudinal direction (LD) in the longitudinal direction, and a plurality of openings 3a, 3b are alternately formed at substantially equal intervals and in a continuous manner. In the present embodiment, in the present embodiment, the plurality of openings 3a and 3b are alternately formed at substantially equal intervals, but they may not be formed at substantially equal intervals and continuously. Here, the groove portions 1a and 1b of the fiber assembly are formed by the following procedure using the fiber web 100 shown in Fig. 4 of the fiber assembly. For example, the lower side of the fiber web 100 is supported by the mesh supporting member 300 shown in Fig. 3, and gas is blown from the upper side thereof to move the constituent fibers 1 of the fiber web 1 . Thereby, the groove portions 1a, 1b are formed. The movement of the constituent fibers 101 of the fiber web 100 is controlled by blowing a fluid mainly composed of a gas from the upper surface side of the fiber web 1 . The convex portions 2a and 2b are regions which are not blown by the fluid mainly composed of gas in the fiber web 100, and are relatively protruded with respect to the groove portions 1a and 1b. Here, as shown in FIG. 3A 'FIG. 3B, the mesh supporting member 300' is woven by the thread 301 disposed in the longitudinal direction (LD) and the thread 301 disposed in the lateral direction (width direction WD). In the thickness direction of the mesh supporting member 300, the wire 301 is crossed in the zigzag shape so as to span the wire 301 in the thickness direction of the mesh supporting member 30 〇 in the thickness direction of the mesh supporting member 300. For example, the serrations of the wires 312 are interwoven in the longitudinal direction (LD). The fiber web 100 of the fiber assembly is supported from the lower side by the mesh supporting member 300 shown in Figs. 3A and 3B, and when the main-13-(10) 1343430 is used as the gas from the upper side. The blowing position on the fiber web 100 is substantially the same between the respective threads 3 0 1 disposed along the longitudinal direction (LD), and is disposed on the thread 312 between the respective threads 3 0 1 . The openings are formed to form the openings 3a, 3b. The openings 3a and 3b are formed at a predetermined interval in a circular or substantially elliptical shape in the hole portion of the groove portion 1 penetrating the nonwoven fabric 116. In the present embodiment, the openings 3a are formed at substantially equal intervals, but are not limited thereto, and may be formed differently. Further, the side edges 14 and 16 are formed in the opening portions by moving the fiber web 100 toward the lower side of the inclined line 3 0 2 disposed at the width side [ί]. That is, the one side edge portion 1 4 'width direction (WD) is observed as a region on the side of the opening portion 3a or 3b. The other side edge portions 15 and 17 are formed on the side of the opening portions 3a and 3b and the one side edge portions 14, 16. That is, the other side edge portion is the other region on the side of the openings 3a, 3b via the openings 3a, 3b. The other side edge portion 15 of the openings 3a and 3b and the web 100 hardly move. Specifically, as shown in Figs. 1A, 1B, and 2, the convex portions 2a and 2b form one side edge portion of the opening portions 3a and 3b, respectively. One side edge portion 16 of the opening portion 3b is opposite to the side edge portion 14 of one side of the opening portion 3a in the width direction (WD). On the other hand, the other side edge portions 15 and 17 of the opening portion are formed in the convex portions 2a and 2b, respectively. The constituent fibers 1 构成 constituting the web 1 相对 are preferably centered with respect to the one side edge portions 14 and 16. The fiber web is made up of a large 3b, although the interval is 0 ( WD 3 a ' 3 b 16, from the vicinity of the opposite edge of the 15 and 17 edges, the fiber is shown, and the 14' 16 system is located at 3a, 3b. In the present embodiment, the above-mentioned side edge portions 14 and 16 and the other side edges πβ 1 5 and 17 are formed in the convex portion 2 in the present embodiment. a and 2 b are not limited thereto, and may be formed in the groove portions 1 a and 1 b. The nonwoven fabric 116 forms the first connecting portion 4a between the first opening portion 3a and the second opening portion 3b (the following may be The "first connecting portion 4a" is simply referred to as a connecting portion 4a). That is, the adjacent convex portion 2a is connected between the opening portion 3a adjacent to the groove portion 1a or the groove portion 1b and the opening portion 3b. The first connecting portion 4a is formed in a manner of 2b. As will be described later, the fiber density of the first connecting portion 4a is higher than the other side edge portion 15 of the first opening portion 3a, and is a region having a higher basis weight. The convex portions 2a and 2b of the non-woven fabric 116 of the present embodiment may have a thickness of 3 to 15 mm, preferably 0, in the thickness direction of the nonwoven fabric 116. 5 to 5mm. The length of the convex portion 2a, 2b in the width direction (WD) of the nonwoven fabric 116 may be 0. 5 to 30 mm, preferably 1. 0~10mm. The distance between the vertices of the adjacent convex portions 2a, 2b may be 0. 5 to 30 mm, preferably 3 to 10 mm, the height of the groove portions 1a, 1b in the thickness direction of the nonwoven fabric 116 is 90% or less of the height of the convex portions 2a, 2b, preferably 〇 50%, more preferably Good for 1 to 20%. The length of the groove portions la, lb in the width direction (WD) of the nonwoven fabric 116 may be 〇. 1 to 30 mm, preferably 0. 5~10mm. The distance between adjacent groove portions la and lb is 0. 5 to 20 mm, preferably 3 to 10 mm. Here, the height 0% in the thickness direction means that the area belongs to the opening portion 3a, 3b 〇-15-(12) (12) 1343430. By adopting such a design, for example, the non-woven fabric 116 is applied to an absorbent article. In the case of the surface sheet, even if a large amount of a predetermined liquid is discharged, the liquid is not easily bleed on the surface by forming the grooves 1a, 1b. Further, when excessive convex pressure is applied to deform the convex portions 2a and 2b, it is easy to hold the space provided by the groove portions 1a and 1b, and when a predetermined liquid is discharged in a state where external pressure is applied, Make the liquid not easy to seep on the surface. Further, when the absorbent body or the like absorbs a predetermined liquid, even if backflow occurs under the application of the external pressure, the contact area with the skin can be reduced by forming irregularities on the surface of the nonwoven fabric 6. Therefore, the non-woven fabric 116 does not adhere to the skin with a large contact area. Here, the method of measuring the height, pitch, and width of the groove portions 1a, 1b, or 2b, 2b is as follows. For example, the nonwoven fabric 1 16 is placed on the stage in an unpressurized state, and is measured based on the cross-sectional film and the cross-sectional image of the nonwoven fabric 1 16 under the microscope. The non-woven fabric 1 16 of the sample is cut by the convex portions 2a and 2b and the groove portions 1a and 1b. When the height (length in the thickness direction) is measured, the lowest position (i.e., the table surface) of the nonwoven fabric 116 is measured to the optimum position of the convex portions 2a, 2b and the groove portions la, lb. Further, when measuring the pitch of the convex portions 2a and 2b, the distance between the center positions of the convex portions 2a and 2b is measured. Similarly, when measuring the pitch of the groove portions 1a and 1b, the distance between the center positions of the groove portions 丨a and 1b is measured. When the widths of the convex portions 2a and 2b are measured, the maximum width of the bottom surfaces of the convex portions 2a and 2b is measured. Similarly, when the widths of the groove portions ia and ib are measured −16-(13) (13) 1343430 degrees The maximum width of the bottom surface of the groove portions 1a, 1b is measured. Here, the cross-sectional shape of the convex portions 2a and 2b is not particularly limited. For example, it includes a dome shape, a trapezoid shape, a triangle shape, an Ω shape, a quadrangle shape, and the like. In order to enhance the skin-friendly feeling, the vicinity of the top surface and the side surface of the convex portions 2a and 2b are preferably curved surfaces. Further, when the convex portions 2a and 2b are deformed by the external pressure, the convex portions 2a and 2b preferably have a narrower width from the bottom surface to the top surface in order to maintain the space provided by the groove portion 1. The preferred cross-sectional shape of the convex portions 2a, 2b is a curve (curved surface) such as a substantially dome shape. The length of the opening portion 3a, 3b in the longitudinal direction (LD) of the nonwoven fabric 116 (or the length in the width direction (WD)) may be 0. 1 to 5 mm, preferably 0. 5 to 4 mm. The pitch of the opening 3a and the opening 3b adjacent to each other via the first connecting portion 4a may be 0. 5 to 30 mm, preferably 1 to 10 mm. The height of the first connecting portion 4a in the thickness direction of the nonwoven fabric 116 is equal to or lower than the height of the non-woven fabric 116 in the thickness direction of the nonwoven fabric 116, and is preferably 20 to 100%, more preferably 40 to 70%. The length of the first connecting portion 4a in the longitudinal direction (longitudinal direction) and the length in the lateral direction (width direction) of the nonwoven fabric 116 may be 0. 1~5mm, preferably 0. 5 to 4 mm. The pitch between the vertices of the adjacent first connecting portions 4a may be 0. 5 to 30 mm, preferably 1 to 1 mm. The cross-sectional shape of the first connecting portion 4a in the longitudinal direction of the nonwoven fabric 116 is substantially quadrangular. The cross-sectional shape ' of the first connecting portion 4a in the longitudinal direction of the nonwoven fabric 116 is not limited to a substantially square shape, and may be a dome shape, a trapezoidal shape, a square shape, a dome shape or the like. In order to suppress the dispersion of the predetermined liquid in the groove portions ia, lb, it is preferable to have a substantially square shape. In order to avoid the foreign body sensation caused by the contact of the 7-14-(14) 1343430 portion 4a and the skin under excessive external pressure, the first joint portion is preferably a flat surface or a curved surface. 2-2. Fiber alignment, fiber density or unit area weight 2-2-1. Fiber alignment As shown in Fig. 1A, Fig. 1B, and Fig. 2, the nonwoven fabric 1 has a plurality of regions in which the content ratio of the longitudinal alignment fibers is different. These regions are the groove portions 1a, 1b, and the convex portions 2a, 2b (including the opening portion 3a side edge portions 14 and 16 and the other side edge portions of the opening portions 3a, 3b) and the like. Here, the orientation of the fibers 101 in the longitudinal direction (longitudinal direction LD) of the first direction means that the fibers are aligned in the range of -~+45 degrees with respect to the longitudinal direction (LD). The long-side direction (LD) is the direction (MD) in which the non-woven fabric sends the non-woven fabric or the web. The fibers oriented toward (LD) are referred to as longitudinal alignment fibers. Further, the WD alignment in the width direction (lateral direction) of the second direction of the fiber means the direction of the phase 2, that is, the direction orthogonal to the first direction (LD) (CD), the width direction (WD), and the fiber at -45 degrees. ~ Ten 4 5 degrees vane. The fibers aligned in the width direction (WD) are referred to as transversely aligned fiber convex portions 2a, 2b, and cover one of the openings 3a, 3b, 14 and 16 and the other side of the opening 3a' 3b. 1 5, 1 7 'one of the mouth portions 3 a, 3 b side edge portions 1 4, 16 other than the 'convex portion 2 a, the fiber 1〇1 as a whole, on the side of the non-woven fabric 11 of the convex portions 2a, 2b The top 16 of the alignment a in which the direction (LD) and the width direction (WD) are substantially equal is, for example, 1 5 and 1 7 directions of 3b) (the long side 101 of the 45-degree cloth is arranged for the first non-woven fabric) The side edge portion of the crucible is longer than the length of the opening 2b. In other words, (15) (15) 1343430, except for the side edge portions 14 and 16 of the openings 3a and 3b, the convex portions 2a and 2b are different. Preferably, the longitudinal fibers and the transverse fibers are moderately mixed to form a crucible. On the other hand, the constituent fibers 101 of the side edges 14 and 16 of the openings 3a and 3b are formed so as to be long toward the non-woven fabrics 116 of the convex portions 2a and 2b. The directional direction (LD) is aligned. For example, the alignment of the fibers 1 0 1 of the convex portions 2a and 2b is more pronounced in the longitudinal direction (LD). That is, in the first opening portion 3a. One side edge 1 In the fiber 10 of 1, the number of longitudinal alignment fibers is larger than the number of transverse alignment fibers. In the fiber 101 of one side edge portion 16 of the second opening portion 3 b, the number of longitudinal alignment fibers is larger than that of the transverse alignment fibers. For example, the content of the longitudinal alignment fibers of the side edge portions 1 4 and 16 of the opening portion 3 a ' 3 b is 5 5 % to 1 0 0 %, preferably 6 0 to 1 0 0 %. That is, the one side edge portion 166 of the second opening portion 3b has a higher content ratio of the longitudinal alignment fibers than the transverse alignment fibers. The groove portions 1a, 1b are directly fluids mainly composed of gas ( For example, hot air is blown to form regions of the openings 3a and 3b and the first connecting portion 4a. The fibers 1〇1 (longitudinal matching fibers) aligned in the longitudinal direction (LD) of the groove portions 1a and 1b are blown toward the opening. One side of the portion 3a, 3b is on the side of the side edge portion 1 4' 1 6 . The fiber 1 〇 1 (horizontal alignment fiber) aligned in the width direction (WD) is blown toward the side of the joint portion 4 a. Thus, the groove The fibers 101 of the first connecting portion 4 a of the portions 1 a and 1 b are aligned in the width direction (WD). Therefore, the longitudinal fibers of the nonwoven fabric 116 are included in the first connecting portions 4 a of the groove portions 1a and 1b. In other words, the first connecting portion 4a has the highest content ratio of the transverse fibers. That is, in the first connecting portion 4a, the transverse -19-(16) (16) 1343430 has a higher ratio of the aligned fibers than the longitudinally aligned fibers. Specifically, the content of the transversely-oriented fibers of the first connecting portion 4a is from 5 5 % to 100%, preferably from 60% to 1%. When the content ratio of the transverse alignment fibers is less than 55%, the weight per unit area of the groove portions 1a and 1b described later is low, and it is difficult to increase the strength of the nonwoven fabric in the width direction (WD). Thus.  For example, when the non-woven fabric 1 16 is applied to the topsheet of the absorbent article, the use of the absorbent article may cause distortion in the width direction or breakage due to friction with the body. The measurement of the fiber alignment was carried out by using a digital microscope VHX-100 manufactured by Keynes Co., Ltd. according to the following measurement method. (1) The sample is mounted on the observation table in such a manner that its longitudinal direction is in an appropriate direction. (2) Focus the lens on the foremost fiber, except for the fibers that protrude irregularly forward. (3) Set the depth of focus and create a 3D image of the sample on the PC screen. (4) Convert 3D images into 2D images. (5) Within the measurement range, draw a plurality of lines on the screen to divide the long-side direction into parallel lines of appropriate divisions. (6) In each of the cells subdivided by the parallel lines, the alignment of the observed fibers is in the longitudinal direction (LD) (first direction) or the width direction (WD) (second direction), and the measurement is directed in all directions. The number of fibers. (7) For the total number of fibers in the set range, the ratio of the number of fibers oriented in the longitudinal direction (LD) and the ratio of the number of fibers oriented in the width direction (WD) are calculated. 2-2-2. Fiber density The fiber density of the other side edge portions 1 5 and 17 of the openings 3 a, 3 b, for example, -20-(17) (17) 1343430 is 0. 005~〇. 2g/cm3' is preferably 0. 007~0. 07g/cm3. When the convex portions 2a, 2b have a fiber density of less than 0. At 005 g/cm3, not only the deformation of the projections 2a, 2b due to the weight of the liquid or the external pressure contained in the projections 2a, 2b, but also the backflow of the absorbed liquid may be reversed. In addition, when the protrusions 2a, 2b have a higher fiber density than 〇. At 2 g/cm3, the predetermined liquid located in the projecting portions 2a and 2b does not easily move downward. The liquid stays in the projecting portions 2a and 2b to give the user a moist feeling. The fiber density of one edge portion 14 and 16 of the openings 3a, 3b is 1 of the fiber density of the other edge portion 15 and 17.  More than 1 time. The fiber density of the first joint portion 4a is 0. 05 g/cm3 or more, preferably 0. 1~0. 5g/cm3. When the first joint portion 4a has a fiber density lower than 〇. In the case of 〇5 g/cm3, when the excessive pressure is applied to deform the convex portions 2a and 2b, the first joint portion 4a may be deformed in the same manner. On the other hand, when the fiber density of the first joint portion 4a is greater than 0. In the case of 5 g/cm3, the predetermined liquid flowing into the groove portions 1a, 1b may accumulate in the first joint portion 4a, and when excessive external pressure is applied to the nonwoven fabric 116 to cause direct contact with the skin, the skin may be allowed. Produces a moist feeling. As described above, the one side edge portion 1 4 of the first opening portion 3 a , the one side edge portion 16 of the second opening portion 3 b , and the first connecting portion 14 4 are at least the other than the opening portion 3a. The side edge portion 15 and the other side edge portion of the opening portion 3b! 7 High density areas with higher fiber density. In particular, the one side edge portion 14 of the opening portion 3a and the one edge portion 16' of the opening portion 3b are defined as a longitudinally extending region of the longitudinal direction (longitudinal direction) (lD). Since the plurality of openings 3a, 3b are alternately and -21 - (18) (18) 1343430 are intermittently formed in the groove portion 1 a ' 1 b, the one edge portion 1 of the opening portion 3 a of the vertical high density region 4. One side edge portion 丨6 of the opening portion 3b is also alternately formed intermittently along the longitudinal direction (LD). Therefore, the nonwoven fabric 116 has a plurality of vertical high-density regions extending in the longitudinal direction (LD). Further, in the non-woven fabric 116, the space area ratio measured from the surface side of the non-woven fabric 116 in the thickness direction, that is, the groove portions 1a and 1b and the convex portions 2a and 2b are formed. The other surface side in the thickness direction of the nonwoven fabric 6, that is, the space area ratio measured on the side opposite to the surface on which the groove portions 1a and 1b and the convex portions 2a and 2b are formed is low. The fiber web 100 conveyed to the mesh supporting member 300 is moved toward the surface side opposite to the opposite side of the blowing surface of the fluid mainly composed of the gas by the influence of gravity, and the fiber is closer to the surface side of the opposite side. The distance between them has a tendency to narrow. On the other hand, the closer to the side of the blowing surface of the fluid mainly composed of gas, the wider the distance between the fibers tends to be. By blowing a fluid mainly composed of a gas, the fiber 101 on the side close to the mesh supporting member 300 is pushed toward the mesh supporting member 300, and a portion thereof faces in a direction parallel to the plane of the mesh supporting member 300. Thereby, the distance between the fibers becomes narrower and the fibers are denser to each other. In this state, heat treatment such as oven treatment is performed, and the fibers are thermally fused to each other to lower the degree of freedom of the fibers 1 〇 1 and to lower the space area ratio between the fibers. On the other hand, as the side away from the side of the mesh supporting member 300 approaches the side of the blowing surface of the fluid mainly composed of gas, the fibers are not excessively pressed against each other, and are blown at the convex portions 2a, 2b. The fluid, which is primarily a gas, is bounced back by the mesh support member 300 such that a portion of the fiber-22-(19) 1343430 dimension 101 is oriented in a direction perpendicular to the mesh support member 300. When the fibers are thermally fused to each other in this state, the space area ratio between the fibers becomes high. Further, the space area ratio means that there is no ratio of the empty area of the fibers in the total area. The method of measuring the space area ratio is as follows. First, the measuring machine was a digital microscopic VHX-100 made by Keynes. First, (1) the sample is attached to the observation stage so that the directions of the groove portions 1a, 1b and the protruding portion '2b are directed in the appropriate direction (LD). (2) At the apex of the convex portions 2a and 2b, the surface on the side opposite to the convex portions 2a and 2b and the convex portions 2a and 2b on the opposite side to the protruding surface are measured as follows. (3) Make the lens magnification of the measuring machine and the magnification on the computer screen appropriate. 将 Align the lens with the fiber on the front side of the sample (except for the fiber protruding from the front). Next, (4) appropriately set the degree of focus to create a 3D image of the sample. (5) Converting a 3D image into a 2D image, defining a space of a gap within the range by a predetermined volume plane. (6) The 2D image is subjected to a second process, and the fiber present portion is set to white, and the fiber non-existing portion is set to black. (7) The color is reversed and the fiber non-existing portion is set to white. The fiber present portion is set to black, and the product after whitening is measured. Here, the magnification is 300 times, the depth of focus is 22 〇 # m (taken once every "m' total shot η times), and η = 1 0 is measured, and the flat is taken. The space area ratio is calculated according to the following formula. Subsequent to the inter-mirror 2a, the deepening of the 値 position is set to 20. • 23- (20) (20) 1343430 Space area ratio (%) = (total space (mm 2) / area of measurement area (mm2) ) xl00 The total area of space here is calculated from (the total area of the space at the time of measurement/magnification at the time of measurement); the measurement range area' is calculated from (the area of the measurement range at the time of measurement/magnification at the time of measurement) . Since the space area ratio is higher, the distance between fibers is larger, so the more easily the fiber moves, the higher the degree of freedom. In addition, the non-woven fabric in which a part of the interfiber distance is widened by the opening treatment or the like is increased in the space area ratio of each space, and the entire surface of the non-woven fabric is mainly composed of a gas-constituting fluid. The distance will be wider. Therefore, for example, when the nonwoven fabric is applied to an absorbent article or the like, the resistance of a predetermined liquid such as excrement or the like when passing through the nonwoven fabric 116 is lowered, and the liquid is easily moved to the absorber or the like. Here, the spatial area of each space refers to the ratio of the total area of the space in which the fiber does not exist in the predetermined range with respect to the number of spaces in which the fiber does not exist. It can be calculated by the following calculation formula. Space area (mm2/piece) = total space area (mm2) / number of spaces (number) The area ratio of the space measured from the protruding side faces of the convex portions 2a, 2b in the convex portions 2a, 2b, and from The difference in the spatial area ratio measured by the convex portions 2a and 2b on the opposite side to the protruding surface is 5% or more, preferably 5 to 80%, more preferably 丨5 to 4%. (21) 1343430 Each vacant area measured from the protruding side of the convex portions 2a, 2b may be 3000/im2, preferably 3000~30000" m2, 5000~20000y m2 ° 2-2-3. The weight per unit area of the nonwoven fabric 116 is, in particular, 200 g/m2, preferably 20 to 1 〇〇g/m2. When the non-woven fabric 1 16 such as the surface sheet of the absorbent article is used, when the weight per unit area is smaller, it is more likely to be broken during use. When the unit surface of the nonwoven fabric 116 is at 200 g/m2, it may not be easy to smoothly flow the liquid flowing over the opening portion 3 a ' 3 b one side edge portion 1 4 , 16 6 the other side portion of the unit area 1 5, 1 7 unit area is 1 weight.  More than 1 time, the unit area of the portions 14 and 16 may be 15 to 2 50 g/m 2 , preferably j 120 g/m 2 . When the accumulated weight of one of the side edge portions 14 and 16 of the opening portions 3a and 3b is less than 15 g/m2, the amount or external pressure ' contained in the protruding portion 2a, 2b not only causes deformation of the protruding portion 2a, 2b, And the subsequent liquid may reverse flow under pressure. In addition, when one of the sides 3b of the opening 3b! 4, the unit area of 16 is greater than 25 0g/m2. The predetermined liquid in the protruding portions 2a, 2b does not easily move downward, and stays in the protruding portions 2a, 2b to give the user a moist feeling. The unit side surface of the other side edge portion 1 5 ' 17 of the opening portions 3 a and 3 b is 10 to 200 g/m 2 , preferably 20 to 100 g/m 2 . When the weight of the other side edge portions 15 and 17 of the opening portion is less than 10 〇g/m 2 , the space is more preferably 10 0 : for the case 1 0 g / m 2 product is significant, downward weight, One side edge _ 2 0~ unit liquid heavy-denier absorption part 3a, when the liquid level can accumulate 3 a ' 3 b , because -25- (22) (22) 1334330 the protrusion 2a, 2b contains The liquid weight or external pressure not only causes deformation of the projections 2a, 2b, but may cause backflow once the absorbed liquid is pressurized. Further, when the unit area of the other side edge portions 15 and 17 of the openings 3a, 3b is more than 200 g/m2, the predetermined liquid located in the projecting portions 2a, 2b is not easily moved downward, and the liquid will It stays in the protruding portions 2a and 2b to give the user a moist feeling. The first connecting portion 4a may have a basis weight of 15 to 250 g/m2, preferably 20 to 120 g/m2. When the weight per unit area of the first connecting portion 4a is less than 15 g/m2, the first connecting portion 4a may be deformed in the same manner when the convex portions 2a and 2b are deformed due to excessive external pressure. When the unit area of the first connecting portion 4a is larger than 25 Og/m2, the predetermined liquid flowing into the groove portions 1a and 1b may be accumulated in the first connecting portion 4a, and excessive external pressure is applied to the non-woven fabric 116. When it comes into direct contact with the skin, it may give the skin a moist feeling. According to the above description, the unit area of one side edge portion 14 of the first opening portion 3a is heavier than the other side edge portion 16 of the first opening portion 3a. The one side edge portion 15 of the second opening portion 3b has a larger unit area than the other side edge portion 17 of the second opening portion 3b. The unit area of the first connecting portion 14a is heavier than the other side portion 16 of the first opening 3a. 2-3. Others The non-woven fabric of the present embodiment is used for absorbing a predetermined liquid or allowing it to pass through, and the liquid is transmitted through the grooves 1a and 1b, and the convex portions 2a and 2b are made porous to make it difficult to hold the liquid. Further, the openings 3a and 3b' formed in the groove portions 1a and 1b are -26-(23) (23) 133430, and the solids can be transmitted in addition to the liquid. A plurality of openings 3a and 3b are formed in the groove portions 1a and 1b to allow liquid and solid to pass therethrough. The fibers 101 at the bottoms of the groove portions 1a, 1b are aligned in the width direction (WD) to prevent the liquid from excessively flowing toward the longitudinal direction (LD) of the nonwoven fabric 116 of the groove portions 13 and ib. Although the weight per unit area of the groove portions U and lb is low, the strength of the nonwoven fabric in the width direction (WD) can be improved by aligning the fibers 1〇1 in the width direction (WD) of the groove portions la and ib (CD alignment). 2-4. The manufacturing method of the nonwoven fabric of the present invention is a method in which a substantially sheet-shaped fiber assembly is sprayed with a fluid mainly composed of a gas in a state in which the constituent fibers have a degree of freedom to form a longitudinal direction (LD) in the longitudinal direction. a plurality of openings, and a fiber density of each of the plurality of openings, that is, a side edge portion of the width direction (WD) is larger than the other side of the width direction (WD) of each of the plurality of openings The edge is higher. A method of manufacturing the nonwoven fabric 116 of the present embodiment will be described with reference to Figs. 3 to 8 . First, the web 100 is loaded on the upper side of the mesh supporting member 300. In other words, the web is supported by the mesh support member 300 from the lower side. Then, in a state in which the web 100 is supported, the mesh supporting member 300 is moved in the longitudinal direction (LD) in the longitudinal direction, and the gas is continuously blown from the upper side of the moving web 100. The nonwoven fabric 1 16 of the present embodiment was produced. -27 - (24) (24) 1343430 As shown in Fig. 5 to Fig. 8, the nonwoven fabric manufacturing apparatus 90 for manufacturing the nonwoven fabric 116 of the present embodiment includes a mesh supporting member 300 (from the fiber assembly) The conveyor 930» is supported by one side of the fiber web 100, the blowing part 910 of the blowing means, the air supply part not shown, and the moving means for moving the fiber web 1 of the fiber assembly in the predetermined direction F. The blowing portion 910 is a fiber web 1 (supported on one side by the mesh supporting member 300) of the fiber assembly, and a fluid mainly composed of a gas is blown from the fiber web 100 of the fiber assembly. As shown in Fig. 3, the mesh supporting member 300 includes, for example, a venting portion and a non-venting portion, and the venting portion is mainly composed of a gas which is blown from the other side of the fiber web 1 , that is, the upper surface side. The fluid can pass to the lower side of the opposite side of the mesh support member 300 and the configuration side of the web 100. The non-venting portion is a fluid mainly composed of a gas which is blown from the upper side of the fiber web 100, and cannot pass to the lower side of the mesh supporting member 300, and the constituent fibers of the fiber web 100 are 1 0 1 It is not possible to move toward the opposite side of the mesh support member 300. That is, the wire 301 of the mesh supporting member 300, the wire 302, and the intersection portion 3 0 of the mesh supporting member 300 constitute a non-venting portion. On the other hand, as described above, the wire 30 of the mesh supporting member 300 and the hole portion 03 of the portion surrounded by the wire 302 constitute a vent. The hole portion 3〇3' of the mesh supporting member 300 can cause the constituent fibers 101 of the fiber web 100 to move toward the side opposite to the side on which the web 1 〇〇 is disposed. Thereby, the protrusion protruding in the thickness direction can be formed. The projections will be described in detail in the third embodiment (see Fig. 1). -28- (25) (25) 1343430 The mesh supporting member 300' is woven by the wire 301 disposed along the longitudinal direction (LD) and the wire 301 disposed along the lateral direction (width direction WD) as described above. 1 is interlaced into a zigzag shape in a zigzag pattern in a thickness direction across the wire 3 0 1 in the thickness direction, and is woven in a longitudinal direction (LD). In other words, the non-ventilating portion is woven such that the apex portion in the upper direction of the wire 301 is connected to the apex portion in the lower direction of the wire 309, and the other wire 3 0 1 adjacent to the wire 3 0 1 is made. The apex portion in the lower side direction is connected to the apex portion of the upper side of the other wire 308 adjacent to the wire 309. Here, as described above, the fiber web 100 is supported by the mesh shown in Fig. 3. The member 300 is supported from the lower side of the one side, and when a fluid mainly composed of a gas is blown from the upper side, the positional relationship between the discharge port 913 and the wire 3 0 1 disposed along the longitudinal direction (LD) is preferably The fluid mainly composed of a gas which is blown from the discharge port 9 1 3 is sprayed to the approximate center between the wire 3 0 1 and the wire 3 0 I. As a result, the openings 1a, 3b can be formed by blowing a fluid mainly composed of a gas to move the web 1 配置 disposed on the wire 302. The web 1 〇 移动 is moved toward the lower side of the inclined wire 3 0 2 to form one side edge portion 1 4 and 丨 6 of the opening portions 3 a and 3 b. Further, the side edges on the opposite side to the one side edge portions 14, 16 in the width direction (WD) of the openings 3a, 3b, that is, the other side edge portions 15, 17, and the fiber web 1 0 0 Hardly moving. Here, the inclination of the wire 312 arranged along the longitudinal direction (LD) is -29-(26) (26) 1343430. The difference is 〇.  5 m πι or more, preferably 0. 5 ^ , more preferably 1 0~ 5. 0mm. In the case of such a supporting member, the air permeability can be locally changed by locally changing the weaving method, the thickness of the thread, or the shape of the thread. For the mesh supporting member 300', for example, a resin yarn such as polyester, polyphenylene sulfide, nylon, or conductive monofilament, or a metal wire such as stainless steel, steel, or aluminum can be used. A portion of the fluid mainly composed of gas blown from the upper side of the fiber web 100 is blocked by the intersection of the wire 301 of the mesh supporting member 300, the wire 302, and the like, and a portion is not supported by the mesh. The member 300 is blocked and can pass to the lower side. The air permeability of the region such as the hole portion 303 of the ventilating portion is, for example, loooo to 60000 cc/cm 2 · min, preferably 20,000 to 50,000 cc/cm 2 · min. Preferably, the mesh supporting member used has a surface slidability higher than that of the vent portion in the non-venting portion. By improving the slidability, the fiber 100 can be easily moved in the intersection of the blowing region and the non-venting portion of the fluid mainly composed of the gas, and the moldability of the openings 3a and 3b and the first connecting portion 4a can be improved. Here, as shown in Fig. 5 and Fig. 6, in the nonwoven fabric manufacturing apparatus 90, the web 100 is sequentially moved in a predetermined direction to form the nonwoven fabric 115 (in the present embodiment, it corresponds to the nonwoven fabric 116). This moving means moves the fiber web 100 of the fiber assembly (supported by the mesh supporting member 300 on one side) in a predetermined direction. Specifically, in a state where a fluid mainly composed of a gas is blown, the web 1 is moved toward the predetermined direction F by -30 - (27) (27) 1334130. For the moving means, for example, a conveyor 930 can be used. The conveyor 93 0 includes a horizontally long annular ventilating belt portion 9309 for loading the mesh-shaped supporting member 300, and is disposed inside the horizontally long annular ventilating belt portion 939 and located in the longitudinal direction ( Both ends of the LD) are rotating portions 931 and 933 for rotating the annular air-permeable belt portion 939 in a predetermined direction. The conveyor 93 0 moves the mesh supporting member 300 (supporting the fiber web 1〇〇 from the lower side thereof) in the predetermined direction F as described above. Specifically, as shown in Fig. 7, the web 100 is moved so as to pass through the lower side of the blowing unit 910. Further, the web 100 is moved by the inside of the heating means (the heater portion 590 of both sides). The blowing means includes an air supply portion (not shown) and a blowing portion 910. The air supply unit (not shown) is connected to the blowing unit 910» air supply pipe 920 via an air supply pipe 920, and is ventilably connected to the upper side of the blowing unit 910. As shown in Fig. 8, a plurality of discharge ports 913 are formed at a predetermined interval in the blowing portion 910. As shown in Fig. 7, the gas sent from the air supply unit (not shown) to the blowing unit 910 via the air supply pipe 920 is ejected from the plurality of ejection ports 913 of the blowing unit 910. The gas ejected from the plurality of discharge ports 913 is continuously sprayed onto the upper side of the fiber web 1 〇 0 (the lower side of which is supported by the mesh support member 300). Specifically, the gas ejected from the plurality of ejection ports 913 is continuously ejected toward the upper surface side of the web 00 which is moved in a predetermined direction by the conveyor 93 0. The intake portion 915' disposed below the blowing portion 910 and located below the mesh supporting member 3 〇 0 can be sucked from the blowing portion 910 and absorbed by the gas or the like of the mesh supporting member 300. By the suction function -31 - (28) (28) 1343430 of the suction portion 915, the fiber web 100 can be positioned so as to be bonded to the mesh supporting member 300. By the suction function, the shape of the groove portion (concavity and convexity) formed by the air flow can be conveyed to the heater portion 95 保持 while maintaining the shape. In this case, it is preferable to carry out the suction while the airflow is being formed, and to carry it to the heater unit 95 0 while sucking. The temperature of the fluid which is mainly composed of a gas which is ejected from each of the discharge ports 913 can be set to a normal temperature as in the first embodiment. For example, in order to improve the moldability of the groove portion (concavity and convexity) 'opening portion, it is possible to set the fiber assembly. The softening point of the thermoplastic fiber is preferably in the range of from 10,000 ° C to 50 ° C. When the fibers are softened, the resilience of the fibers themselves is lowered, and the fibers are easily maintained in a shape in which they are re-arranged by a gas flow or the like. When the temperature is increased, the fibers are thermally fused together, and it is easier to maintain the shape of the grooves (concavities and convexities). Thereby, it is easy to convey to the heater part 950 in a state in which the shape of the groove (concavity and convexity) is maintained. The heater unit 950 of the heating means forms an opening at both ends in a predetermined direction. Thereby, the web 1 上 loaded on the mesh supporting member 300 moved by the conveyor 93 0 is retained in the heating space inside the heater unit 95 0 for a predetermined period of time. For example, when the constituent fibers 10 1 of the fiber web 1 comprise a thermoplastic resin, the fibers 〇 1 are bonded to each other by heating by the heater portion 950 to obtain a nonwoven fabric 115. In order to form the nonwoven fabric 1 16 having the openings 3 a, 3 b , a support member different from the mesh support member 300 can also be used. The size and arrangement of the groove portions 1a, 1b, the convex portions 2a, 2b, the openings 3a, 3b, and the first connecting portion 4a can be changed depending on the type of the supporting member to be used. For example, a sleeve made of stainless steel such as -32-(29) (29)1343430 steel, copper, or aluminum may be used. The sleeve can be obtained by partially punching the above-mentioned metal plate in a predetermined pattern. A portion of the metal plate that is punched forms a venting portion, and a portion that is not punched forms a non-venting portion. Similarly to the above, in the non-venting portion, in order to improve the surface slidability, the surface thereof is preferably smooth. In this case, it is preferable that the lower side of the mesh supporting member 300 or the support member of the sleeve is provided with an intake portion 915 for sucking a fluid mainly composed of a gas which is blown to the nonwoven fabric 116. By sucking the fluid mainly composed of the gas by the suction portion 915, it is possible to prevent the fluid mainly composed of the gas from being excessively rebounded by the mesh supporting member 300 and damaging the shape of the fiber web 1 。. The attraction strength for attracting a fluid mainly composed of a gas may be controlled to such an extent that the fiber 101 capable of blowing a region of a fluid mainly composed of a gas is pressed against the supporting member. In order to maintain the state of being pressed against the supporting member, the temperature of the fluid mainly composed of the gas to be blown is preferably such that a part of the constituent fibers 101 of the nonwoven fabric 116 constitutes a softening point or more of the fiber, more preferably a melting point or higher. the following. The convex portion 2a, 2b, and the opening portion can be changed by adjusting the air volume 'temperature, the amount of suction, the air permeability of the supporting member, the weight per unit area of the fiber web 100, etc., of the fluid mainly composed of the gas to be blown. 3 a, 3 b, the shape of the first connecting portion 4 a, and the like. For example, when the amount of the fluid mainly composed of the gas to be blown is substantially equal to the amount of the fluid mainly composed of the gas to be sucked (inhaled), or the amount of suction is large, the convex portions 2a, 2b of the nonwoven fabric 116 are The back side is formed along the shape of the mesh supporting member 300. -33- (30) (30) 1343430 By attracting a fluid mainly composed of a gas from the lower side of the mesh supporting member 300, a fiber mainly in the blowing region of the fluid composed of the gas is pressed toward the side The mesh supporting member 300 moves to the side, so that the fibers gather toward the side of the mesh supporting member 300 side. In the convex portions 2a, 2b, the fluid mainly composed of the gas blown against the mesh supporting member 300 moderately rebounds, whereby a part of the fibers are directed in the thickness direction. 3 . Other Embodiments Other embodiments of the nonwoven fabric of the present invention will be described below. In the following embodiments, the portions that are not particularly described are the same as those in the above-described embodiment, and the same reference numerals are given to the elements in the drawings. The second embodiment and the third embodiment of the nonwoven fabric of the present invention will be described with reference to Figs. 9 to 11 . The second embodiment and the third embodiment are other embodiments in which the shape of the nonwoven fabric is different. 3-1. (Second Embodiment) A second embodiment of the nonwoven fabric of the present invention will be described with reference to Fig. 9 and Fig. 1 . 3-1 -1 . The non-woven fabric of the present embodiment is formed on the side opposite to the second opening portion 3b of the first opening portion 3a as shown in Fig. 9 and the first opening portion 3a. The adjacent third opening portion 3c forms a second connecting portion 4b between the first opening portion -34-(31) (31) 1343430 3 a and the third opening portion 3 c. The non-woven fabric 1 40 of the present embodiment differs from the first embodiment in that one side edge portion 16 of the second opening portion 3b and the first connecting portion 4a, and one side edge portion 14 of the first opening portion 3a The two connecting portions 4b and one side edge portion 18 of the third opening portion 3c are formed in a continuous meandering shape. In the nonwoven fabric 140 of the present embodiment, the groove portions 1a and 1b, the convex portions 2a and 2b, the openings 3a and 3b, and the opening portions 3a and 3b are formed on one side edge portion 14 and 16 and the opening portion 3a. The other side edge portions 1 5, 17 of the 3b, and the first joint portion 4a, the fiber alignment, the fiber density, the basis weight, and the like are the same as those of the above embodiment. Hereinafter, the first opening 3a, the second opening 3b, and the third opening 3c adjacent to the second opening 3b of the first opening 3a (the following third opening) The portion 3c can be simply referred to as an example in which the opening portion 3c) is regarded as a plurality of openings 3, and differences from the above embodiment will be described. 3-1-2. Nonwoven fabrics As shown in Figs. 9 and 10, the nonwoven fabric 14 of the present embodiment is formed as a non-woven fabric in which the openings 3a, 3b, and 3c are formed as described above. In other words, the "non-woven fabric 140" sequentially forms the opening 3^, the opening 3a, and the opening 3b in the longitudinal direction (L D) of the nonwoven fabric 140 from the front side of the drawing. In the same manner as the one side edge portions 14 and 16 of the openings 3a and 3b, the non-woven fabric 1 40 is formed with the opening portion 3c in the width direction (WD) of the nonwoven fabric M. The side edge portion 1 8 p is here. The side edge portion μ of the opening portion 3c is a side edge portion on the side opposite to the width direction (WD) of one side edge portion 14 of the first opening portion 3a of -35-(32) (32) 1343430 . On the other hand, the other side edge portion 19 in the width direction (WD) of the opening portion 3c is formed in the convex portions 2a and 2b. Further, the non-woven fabric 140 forms a second connecting portion 4b between the first opening 3a and the third opening 3c. In other words, between the first opening 3a and the third opening 3c adjacent to the groove portion ia (groove portion 1b), the convex portions 2a and 2b are connected (the groove portion ia or the groove portion ib is interposed therebetween) The second connecting portion 4b is formed to be adjacent to each other. In other words, the plurality of second connecting portions 4 b ' formed at a predetermined interval are used to connect the convex portion 2 a and the convex portion 2 b adjacent thereto. As will be described later, the second connecting portion 4b has a higher fiber density than the other side edge portion 15 of the first opening portion 3a. As described above, the third opening portion 3 c is formed in the same manner as the openings 3 a and 3 b : the one edge portion 18 is in the same manner as the one edge portions 1 4 and 16 The other side edge portion 197 is formed in the same manner as the one side edge portion 15 and 1 1 2 3 4 5; the second connecting portion 4 b is the same as the first coupling portion 4a. Way to form. The size, thickness, fiber orientation, unit area weight, and space area ratio are all the same, so the description is omitted. -36- 1 _ 1 - 3 ·Fiber density 2 As shown in Figure 9 and Figure 1 'and the first! Similarly to the connecting portion 4a, the third connecting portion 4b is a region in which the fiber bundle is higher than the other side edge portion 154 of the opening portion 3a. As described above, the first connecting portion 4a and the one side edge portion 14 of the opening portion 3a are similarly the same as the other (33) (33) 1334330 side edge portion 15 of the opening portion 3a. High area. In other words, the first connecting portion 4a, the one side edge portion 14 of the opening portion 3a, and the second connecting portion 4b belong to a high-density region. Therefore, the first connecting portion 4a, the one side edge portion 14 of the opening portion 3a, and the second connecting portion 4b are on the opposite side (one side) of the one edge portion 14 of the opening portion 3a in the width direction (WD) of the nonwoven fabric 140. The opening is formed into a C-shape, and the whole is defined as a C-shaped high-density region. Since the plurality of openings 3a, 3b, and 3c are alternately formed in the groove portions 1a and 1b, the first connecting portion 4a of the C-shaped high-density region, the side edge portion 14 of the opening portion 3a, and the second connecting portion are formed. 4b is also continuously formed along the longitudinal direction (LD) of the nonwoven fabric 140. Therefore, the nonwoven fabric 1 40 of the present embodiment has a plurality of C-shaped high-density regions extending in the longitudinal direction (LD). The c-shaped high-density region is an "inverted C-shaped" high-density region having an opposite shape of "C-shaped", that is, an inverted C-shaped high-density region. In the present embodiment, a "C-shaped" high-density region is formed in the groove portion 1a, and an "inverted c-shaped" density region is formed in the groove portion 丨b, that is, a pair of grooves are formed in the groove portions 1a and 1b. a d-shaped "high-density region"; a "C:-shaped" high-density region is formed in the groove portion la, and a "c-shaped" high-density region is formed in the groove portion b, that is, the groove portions 1a and 1b are formed in the same shape. The "c-shaped" high-density area. In addition to the one side edge portion 14 of the second opening portion 3 a, the one side edge portion 16 of the second opening portion 3 b , and the first connecting portion 4 a, the second connecting portion 4 b and the third opening portion One of the 3C side edge portions 8 is also a region having a higher fiber density than the other side edge portion 15 of the first opening portion 3a. -37-(34)1343430, as shown in Fig. 9 and Fig. 10, the non-woven fabric of the present embodiment] one side edge portion 16 of the second opening portion 3b, one side of the first connecting portion 4a, and the first portion 3a The first portion 4, the second opening portion 4b, and the third opening portion side edge portion 18 are formed in a continuous meandering high-density region, the one side edge portion 16 of the second opening portion 3b, the first connecting portion 4a, and the first portion One of the side portions 14a, the second connecting portion 4b, and the third opening portion side edge portion 18 of the first portion 3a are defined as a serpentine high-density region. Since the plurality of openings 3a, 3b, and 3c are continuously formed in the groove portions 1a and 1b, the second opening portion 3b side edge portion 16 and the first connecting portion 4a' first opening portion in the meandering high-density region are formed. 3 a side edge, second connecting portion 4b, third opening portion 3c. The one side edge portion 18 is also formed in the longitudinal direction (LD) of the nonwoven fabric 140. Therefore, the non-woven fabric 140 of the present embodiment has a plurality of meandering high-density regions extending in the longitudinal direction (LD) of the groove portions ia and lb. The nonwoven fabric 140 of the present embodiment can be manufactured by the above-described nonwoven fabric 90. For the non-woven fabric manufacturing of the nonwoven fabric manufacturing apparatus 90, reference may be made to the manufacturing method of the above-mentioned nonwoven fabric 116 and the description of the nonwoven fabric manufacturing 90. For example, in the present embodiment, in the case where the fluid (for example, hot air) having a gas composition is more strongly injected than in the first embodiment, the amount of the fluid mainly composed of the gas is larger, and almost no net is 100. In the case where the thread tension is applied, the fluid is shaped or the like is excessively supplied before the fluid (for example, hot air) composed of the main gas is blown onto the fiber web 00, and the nonwoven fabric 140 and the opening 3c can be manufactured by the nonwoven fabric manufacturing apparatus 90. One of the openings 13c and one of the portions 14 is formed along the long side of the forming device. When the main and the opposite fibers are required, 140-38-(35) (35) 1343430 3-2. (THIRD EMBODIMENT) A third embodiment of the nonwoven fabric of the present invention will be described with reference to a U-shaped drawing. 3-2-1. Non-woven fabric As shown in Fig. 11, the nonwoven fabric 150 of the present embodiment is different from the above-described embodiment in that a region corresponding to the convex portions 2a and 2b on the other surface side (the other surface side) is formed in a convex shape. The protruding directions of the portions 2a, 2b protrude in the same direction. The non-woven fabric 150 of the present embodiment is formed on the other side, and a plurality of projections 1 are formed. In the non-woven fabric 150 of the present embodiment, the groove portions 1a and 1b, the convex portions 2a and 2b, the openings 3a, 3b, and 3c, and one of the opening portions 3a, 3b and 3c are opened at the side edge portions 14, 16' and 18'. The other side portions 1 5, 17 and 19 of the portions 3a, 3b, and 3c, the first connecting portion 4a, and the second connecting portion 4b' have such a fiber alignment, a dense fiber, a weight per unit area, and the like. Both are the same as the above embodiment. The following only explains the differences. 3-2-2. Non-woven fabrics As shown in Figs. 1 1 A and 1 1 B, the nonwoven fabric 1 5 0 ′ of the present embodiment alternately forms the groove portions 1 a and 1 b at substantially equal intervals. Between the groove portion 1a and the groove portion 1b, the convex portions 2a, 2b are formed alternately and at substantially equal intervals. The non-woven fabric 150 is formed on the other surface side in the region LD corresponding to the bottom surface of the convex portions 2a and 2b so as to protrude in the same direction as the convex portions 2a' to 2b on one surface side. In other words, 'non-woven fabric 150' is attached to the other side of the non-woven fabric I 5 ,, and a concave portion is formed in a region corresponding to the bottom surface of the convex portions 2 a and 2 b on the side of the one side -39-(36) (36) 1334430. Further, even a region corresponding to the bottom surface of the convex portions 2a and 2b on the one surface side is convex. In addition, as shown in FIG. 11A and FIG. 11B, the non-woven fabric 15 〇 is on the other side, and corresponds to one side edge portion 14 of the first opening portion 3a and one side edge portion 16 of the second opening portion 3b. The portion of the connecting portion 4a'the second connecting portion 4b and the one side edge portion 18 of the third opening portion 3c is formed with a plurality of protrusions 10 projecting in a predetermined length in the thickness direction. In the formation of the protrusion 1 〇, one side edge portion 14 of the first opening portion 3 a in the high-density region, one side edge portion 16 of the second opening portion 3 b, the first connecting portion 4a, and the second portion The constituent fibers 101 of the web 100 in the side edge portion 18 of the connecting portion 4b and the third opening portion 3c are separated from the mesh supporting member 300 and then protruded in the thickness direction. That is, the constituent fibers 110 of the web 1 〇〇 after being sprayed with a fluid mainly composed of a gas are subjected to the action of the wire 30 1 of the mesh supporting member 300 and the wire 308 to make the plurality of projections 10 It protrudes toward the thickness direction of the fiber web 1〇〇. As shown in Fig. 11B, the cross-sectional shape of the longitudinal direction (LD) of the projection 10 is substantially quadrangular. The cross-sectional shape ' of the longitudinal direction (LD) of the protrusion 10 is not limited to a substantially square shape, and may be a dome shape, a ladder shape, a triangular shape, an Ω shape, or the like. In order to suppress the diffusion of the predetermined liquid of the grooves 1a and 1b, it is preferable to form a substantially square shape. In order to avoid the foreign body sensation caused by the protrusion 10 coming into contact with the skin under excessive external pressure, the top surface of the protrusion 10 is preferably a flat surface or a curved surface. In the present embodiment, the cross-sectional shape of the longitudinal direction (LD) of the protrusion 1 is substantially quadrangular. For example, a triangular-shaped (triangular-shaped) -40-(37) 1343430 protrusion and a triangular shape (triangular column) may be used. The apex in the thickness direction of the top is a curved surface.  The protrusions and the quadrangular (four-cornered columnar) projections are formed to be inclined (with respect to the thickness direction) in the projections. When viewed from the side of one of the non-woven fabrics 150, the plurality of protrusions 1 are shaped and shaped.  a plurality of flat portions formed in a substantially square shape between the plurality of protrusions 1 and a plurality of * openings 3 a, 3 b, 3 c formed on one side of each of the plurality of flat portions, It is formed regularly. 3-2-3. Manufacturing method and mesh supporting member The manufacturing method of the non-woven fabric 150 of the present embodiment is the same as the above-described description, and as described later, even when the amount of fluid mainly composed of a gas is larger than that of the second embodiment, The nonwoven fabric 150 is manufactured by the above-described nonwoven fabric manufacturing apparatus 90. Further, the mesh supporting member 3 00 used in the production of the nonwoven fabric 150 is the same as the mesh supporting member 300 of the first embodiment. That is, the fiber web 1 〇〇 of the fiber assembly is sprayed with a fluid mainly composed of a gas in a state where the lower side thereof is supported by the mesh supporting member 300. At this time, the fluid mainly composed of the gas to be blown is sucked (inhaled) from below the mesh supporting member 300. The amount of fluid that is attracted (inhaled) is mainly composed of a gas, and is smaller than the amount of fluid mainly composed of gas that is blown. That is, when the fluid mainly composed of gas is larger than the amount of the fluid mainly composed of the gas, the fluid which is mainly composed of the gas is slightly rebounded, and the convex portion 2a is made. The lower side (bottom side) of '2b' protrudes in the same direction as the convex-41 - (38) 1334130-shaped portions 2a, 2b on the upper surface side of the convex portions 2a, 2b. Thereby, the other side surface region corresponding to the bottom surface of the groove portion 1a is relatively protruded, and a convex portion protruding from the lower side is formed. 4. Use Examples The use of the nonwoven fabric of the present invention includes, for example, a surface sheet of an absorbent article such as a sanitary napkin, an adult cloth, a disposable diaper, or the like. At this time, the convexity can be located on either the skin side or the back side, and the wet contact with the skin can be suppressed by the surface area of the skin to reduce the contact area with the skin, and can also be used as the surface sheet and the absorbent body of the absorbent article. The middle piece comes. Since the contact area with the surface sheet or the absorbent body is reduced, the backflow of the body can be suppressed. In addition, since it can reduce the contact area with the skin and the cushioning feeling, it is also suitable for the side sheet of the absorbent article, the diaper (the outermost part), the female fastener of the fastening tape, and the like. In addition, it can also be used for various purposes such as a dust-removing paper cover, a breast milk pad, and the like which are attached to the floor, body dust, dirt, and the like. 4-1. Surface sheet of absorbent article Regarding the use of the nonwoven fabric of the present invention, as shown in Figs. 12 and 13, for example, a nonwoven fabric can be applied to the surface sheet 4 Ο 1 of the absorbent article (the convex portions 2a, 2b) Disposed on the skin surface side: the non-woven fabric has irregularities, and the concave portion (the groove portions 1a, 1b) has a plurality of openings 3b and a first connecting portion 4a, and one side edge I of the opening portions 3a, 3b The fiber density is higher than that of other parts (for example, the other of the openings 3a and 3b, and the lb-face side of the urinary side, the sense of use. The external use for absorption is used for the '□ □ Fig. 402 tie 3 a ' β 14 side edge - 42- (39) (39) 1343430 Part 1 5) Higher. At this time, the non-woven fabric is preferably arranged such that the convex portions 2a and 2b are formed on the skin side. The side edge portion 14 of the opening portion 3 a ' 3 b has a higher fiber density, that is, a higher rigidity. Therefore, even if a load is applied to one side edge portion 14, the opening portions 3a, 3b can be prevented from being easily deformed. Further, the fiber density of the other side edge portion 15 of the openings 3a, 3b is low, that is, the liquid around the openings 3a, 3b can be prevented from remaining. When the nonwoven fabric is applied to the topsheets 40 1 and 402 of the absorbent article, the liquid mainly flows to the groove portion if a predetermined liquid is discharged. Since the opening portion is provided, even if it is a viscous liquid containing a solid component, the liquid is easily moved to the absorber by the opening portion, and the liquid is prevented from spreading on the surface. Further, most of the fibers of the first connecting portion 4a are aligned in the width direction (WD), and the tensile strength in the width direction (WD) is high, and friction is applied even in the width direction (WD) during use of the absorbent article. Etc., the surface sheet can still be prevented from being damaged. Thereby, even if the load applied to the top sheet is changed due to the posture change, a small contact area with the skin can be ensured, so that a good touch can be maintained, and even if the liquid absorbed by the absorber is reflowed, It is still not easy to adhere to the skin again. 4-2. For the use of the intermediate sheet of the absorbent article with respect to the nonwoven fabric of the present invention, as shown in Fig. 14, for example, the nonwoven fabric can be applied to the intermediate sheet 3 1 1 of the absorbent article (the convex portions 2a and 2b are disposed on the skin side). The non-woven fabric has irregularities, and has a plurality of openings 3a and 3b and a first connecting portion 4a in the recessed portion -43-(40) (40) 1343430 (groove portions 1a, 1b), and the opening portion 3a, The fiber density of one side edge portion 34 of 3b is higher than that of other portions (for example, the other side edge portion 15 of the openings 3a, 3b). At this time, the non-woven fabric is preferably arranged such that the convex portion 2a' 2b forming surface is located on the skin side. The side edge portion 14 of one of the openings 3a, 3b has a higher fiber density, that is, a higher rigidity. Therefore, even if a load is applied to one side edge portion 14, the opening portions 3a, 3b can be easily prevented from being easily deformed. Further, the fiber density of the other side edge portion 15 of the openings 3a and 3b is low, that is, the liquid around the openings 3a and 3b can be prevented from staying. By arranging the non-woven fabric (intermediate sheet) so that the convex portions 2a, 2b are formed on the surface sheet 3 1 0 side, a plurality of spaces can be provided between the surface sheet 3A and the intermediate sheet 3''. Since the intermediate portions 311 are provided with the openings 3a, 3b', even if a large amount of liquid is discharged in a short time, since the elements for obstructing the permeation of the liquid are small, the liquid can be quickly moved to the absorber. Moreover, the liquid can be prevented from flowing back to the surface sheet and diffused. Further, even if the liquid absorbed by the absorber is reflowed through the intermediate sheet 31, since the contact ratio between the intermediate sheet 31 and the surface sheet 3 10 is low, it is difficult to reflow the liquid to the surface sheet and re-appear. Attached to the skin. Further, compared with the groove portions 1a, 1b, since the convex portions 2a, 2b have a large amount of fibers aligned in the thickness direction (TD), and the apexes of the convex portions 2a, 2b are in contact with the surface sheet 310, it is easy to apply the surface sheet. The residual liquid of 310 is attracted toward the thickness direction (TD). Thereby, the liquid residue on the surface sheet can be suppressed - 44- (41) 1343430, so that the surface sheet can be partially spotted and lowered.  Low liquid residue, while avoiding long-term adhesion of liquid to the skin. Further, in the side edge portion 14 of one of the convex portions 2a, 2b, since the content of the longitudinal alignment fibers in the longitudinal direction (LD) is high, it can be moved from the surface sheet 310 to one.  The liquid of the side edge portion 14 is induced in the longitudinal direction (LD). Thereby, even if the liquid diffuses in the width direction (WD), leakage of the absorbent article can be prevented, and the absorption efficiency of the absorbent body can be improved. 4-3. The use of the outer covering material of the absorbent article with respect to the non-woven fabric of the present invention, as shown in Fig. 15, for example, the non-woven fabric can be applied to the outer covering material 3 20 of the absorbent article; the non-woven fabric has irregularities in the concave portion (the groove portions 1a, 1b) have a plurality of openings 3a, 3b and a first connecting portion 4a, and the fiber density of one side edge portion 14 of the openings 3a, 3b is higher than that of other portions (for example, the openings 3a, 3b) The other side edge portion 15) is higher. In this case, the nonwoven fabric is preferably arranged such that the convex portions φ 2a and 2b are formed on the skin side. Since the convex portions 2a, 2b of the outer covering material 3 20 are disposed on the outer side of the absorbent article, when the absorbent article is used, the touch feeling is mainly good when the hand is in contact. Further, by providing the opening portions 3a and 3b in the groove portions 1a and 1b, it is possible to provide excellent air permeability. 5 . Each component The respective components will be described in detail below. -45- (42) 1343430 5 -1 - Non-woven fabric 5 -1 - 1 - Fiber assembly The fiber assembly is formed into a substantially sheet shape and has a fiber composition. In other words, the "fibers having a degree of freedom between the fibers" means that the degree of freedom between the fibers means that the constituent fibers of the fiber assembly (web) can be freely moved by being mainly composed of a gas. For example, the fiber assembly is formed by mixing a plurality of fibers into a fiber to form a predetermined thickness of the fiber layer, and forming a plurality of different fibers so as to be formed by dividing into a plurality of layers. The fiber assembly of the present invention includes, for example, a web formed by a carding method, or the above-mentioned fiber web is thermally fused before being thermally fused and cured. In addition, it includes: a web formed by an airlaid method, or a web which is thermally fused to form a web before heat fusion. In addition, the fiber web formed by the point bonding method is embossed, and the fiber web is fixed by heat fusion. Further, it includes: spinning by a spunbonding method to form an aggregate before embossing, or the above-mentioned fiber assembly is embossed to thermally fuse the solid fiber aggregate. In addition, it includes: a semi-entangled formed by a needle-punching method, a fiber assembly which is melt-sprayed and melted before heat-fusion curing, and a fiber assembly formed by a bonding method by a solvent to be easily used by air. The (gas) flow to re-arrange the fibers is preferably a fiber web formed by a carding method using longer fibers to increase the degree of freedom of the fibers, and more preferably a fiber web before the fusion by the entanglement. . Further, in order to be described later, a plurality of free bodies are used. The degree of mixing of the fluids. For example, the fiber web of the fiber layer includes: a solvent enthalpy for the fiber web before the pre-fibration, wherein: the hot air (-46-(43) 1343430 gas) flows to form a groove portion (bump) After that, the shape is maintained and the fabric is not woven. It is preferable to use an air through method, which will be described later. The thermoplastic fibers contained in the fiber assembly are thermally fused by a given heating device or the like. ‘ 5-1-2. The constituent fibers of the fiber assembly (for example, the constituent fibers 1 〇1 of the fiber φ mesh 10 shown in Fig. 1) include, for example, low density polyethylene, high density polyethylene, and linear polyethylene. Polypropylene, polyethylene terephthalate, modified polypropylene, modified polyethylene terephthalate, nylon, polyimide, etc., each resin can be used alone or in combination. Complex. The composite shape includes, for example, a core sheath type in which the melting point of the core component is higher than the sheath component, an eccentric type of the core sheath, a side by side type in which the melting points of the left and right components are different, and the like. In addition, it is also possible to mix a hollow type, a flat type, a γ type or a C type, a shape, a potential crimping or a crimping fiber which is formed by crimping, or a physics by water flow or heat or embossing. Segmented fibers that are divided by load, and the like. In order to form a 3-dimensional crimped shape, it can be combined with a predetermined potential crimping weave or a crimped fiber. Here, the three-dimensional crimp shape means a spiral shape, a zigzag shape, an Ω shape, or the like, that is, the main body of the fiber alignment faces the plane direction, and a part of the fiber alignment direction faces the thickness direction. Thereby, the buckling strength of the fiber itself can be applied to the thickness direction, and the thickness is not easily lowered even if an external pressure is applied. Among them, the spiral shape can recover from the original shape when the external pressure is released - even if the external pressure is too large, it will easily return to the original thickness. The pinched fiber is a general term for a pre-crimped fiber which is given a shape by mechanical crimping or a core-sheath structure which is an eccentric type or a side-by-side type. The so-called latent crimping fiber is produced by heating to produce a crimper. The mechanical crimping means that the continuous and linear fibers after spinning can be controlled by the circumferential speed difference of the linear velocity, heat, pressure, etc., and the larger the number of crimps per unit length, the more externally The higher the buckling strength of the pressure. The number of crimps is, for example, 1 〇 to 3 5 / 吋, preferably 1 5 to 3 0 / 吋. The imparting of the shape by heat shrinkage means that a fiber composed of two resins having different melting points causes a heat shrinkage ratio due to a difference in melting point upon heating to produce a three-dimensional crimped fiber. The resin structure of the fiber cross section includes an eccentric type of a core-sheath structure, a side-by-side type in which the melting points of the left and right components are different, and the like. The heat shrinkage rate of such a fiber is, for example, 5 to 90%, preferably 10 to 80%. The method for measuring the heat shrinkage rate has the following steps: (1) making a fiber web of 200 g/m2 with 1% by weight of the fiber to be tested, cutting it into a size of 250 x 250 mm as a sample, and (3) taking the sample at 14 5 ° C ( 4 1 8 .  The oven was placed in an oven of 1 5 K for 5 minutes, (4) the length after shrinkage was measured, and (5) was calculated from the difference in length between before and after heat shrinkage. When the non-woven fabric is used as a surface sheet, for example, considering the inflow of liquid and skin-friendly property, the fineness is preferably from 1 to 1 to 8. The range of 8dtex. When the nonwoven fabric is used as a surface sheet, the constituent fibers of the fiber assembly may contain fibers such as pulp, chemical pulp, snail, acetate, natural cotton, etc., for example, in order to absorb a small amount of menstrual blood or sweat remaining on the skin. -48- (45) (45) 1334330 Liquid hydrophilic fiber. However, since the liquid absorbed by the cellulose-based fibers is difficult to be discharged again, the amount of the mixture is preferably at 0. 1 to 5 mass% range. When the nonwoven fabric is used as a top sheet, for example, in consideration of liquid inflow property and rewet property, a hydrophilic agent or a water repellent may be mixed or coated with the hydrophobic synthetic fiber listed above. Hydrophilicity can also be imparted by corona treatment or plasma treatment. In order to improve the whitening property, for example, an inorganic pigment such as titanium oxide 'barium sulfate or calcium carbonate may be contained. In the case of the core-sheath type composite fiber, it may be contained only in the core or at the same time in the sheath. Further, as described above, in order to easily rearrange the fibers by the air current, it is preferable to form the fiber web by the carding method using the longer fibers: in order to form the groove portions (concavities and convexities) by a plurality of air currents, It is preferable to use a hot air method in which the thermoplastic fibers are thermally fused by a heating process or the like by maintaining the shape and performing the nonwoven fabric. In the fiber suitable for the production method, in order to thermally fuse the fibers to each other, it is preferable to use a core-sheath structure or a fiber having a side-by-side structure; and in order to reliably fuse the sheaths to each other, it is preferable to use a fiber having a core-sheath structure. More preferably, it is a core-sheath composite fiber composed of polyethylene terephthalate and polyethylene, or a core-sheath composite fiber composed of polypropylene and polyethylene. These fibers may be used singly or in combination of two or more. The fiber length may be 20 to 100 mm, preferably 35 to 6 5 m m 〇 5-2. About non-woven fabric manufacturing equipment -49- (46) (46) 1343430 5-2-1. Mainly a gas composed of a gas The present invention is mainly a fluid composed of a gas, and includes, for example, a gas adjusted to a normal temperature or a predetermined temperature, or an aerosol containing a solid or liquid fine particles in the gas. As the gas, for example, air, nitrogen, or the like is used. The gas also includes a vapor of a liquid such as water vapor. The term "air suspension colloid" means a liquid or a solid in which a gas is dispersed, and specific examples thereof will be given below. For example, an ink for coloring, a softener for improving flexibility, a hydrophilic agent for suppressing static electricity and wettability, and an active agent for suppressing static energy and water repellency, titanium oxide and barium sulfate for improving fluid energy, and the like are dispersed. An inorganic binder, a powder binder for improving the fluid energy and improving the unevenness of the heat treatment, and an anti-histamine agent such as diphenhydramine hydrochloride and isopropyl cresol for relieving itching , moisturizers, fungicides, etc. The solids herein contain a gel. The temperature of the fluid mainly composed of gas can be appropriately adjusted. The adjustment can be appropriately made in accordance with the properties of the constituent fibers of the fiber assembly, the shape of the nonwoven fabric to be produced, and the like. Here, for example, in order to move the constituent fibers of the fiber assembly, the temperature of the fluid mainly composed of a gas is preferably a certain high temperature to increase the degree of freedom of the constituent fibers of the fiber assembly. When the fiber assembly contains thermoplastic fibers, the temperature of the fluid mainly composed of a gas is set to a temperature at which the thermoplastic fibers can be softened, and the thermoplastic fibers disposed in a blowing region of a fluid mainly composed of a gas are softened or melted, and Harden again. Thereby, for example, a fluid mainly composed of a gas is blown to maintain the shape of the nonwoven fabric -50-(47)(47)1343430. Further, for example, the fiber assembly is given a predetermined strength to prevent scattering of the fiber assembly (non-woven fabric) when the fiber assembly is moved by a predetermined moving means. The fluid mainly composed of gas can be appropriately adjusted. Specific examples of the fiber assembly having a degree of freedom between the fibers include, for example, a core-sheath fiber (a high-density polyethylene is used for the sheath, polyethylene terephthalate is used for the core, and the fiber length is 20 to 100 mm, preferably 35 to 15). 65mm, fineness 1. 1~8. 8dtex' is preferably 2. 2~5. 6dtex) is the main body, and when the card is opened by the carding method, the fiber length is 20 to 100 mm, preferably 35 to 65 mm. When the fiber is formed by air-laid method, the fiber length is 1 to 50 mm, preferably 3 to 20 mm. The fiber web 100 is formed by adjusting to 1 〇 to 100 gsm, preferably 15 to 100 gsm. Regarding the condition of the fluid mainly composed of a gas, for example, a blowing portion 910 having a plurality of discharge ports 913 formed in Fig. 5 or Fig. 6 (discharge port 913: diameter 〇. 1 to 30 mm, preferably 0. 5~5mm, pitch 0. 5~30mm, preferably 〇. 1~l〇mm, the shape is a perfect circle, ellipse or rectangle), will be 15 ~ 300t ( 288. 15IC ~573. 15K), preferably 100 to 200 °C (373. 15 ~ 473. In the hot air of 15K), the fiber web 100 is sprayed under the conditions of an air volume of 3 to 50 [L/(min. hole), preferably 5 to 20 [L (div. hole)]. For example, when a fluid mainly composed of a gas is blown under the above conditions, the fiber assembly which constitutes a change in the position or direction of the fiber is an example of the fiber assembly of the present invention. By using such fibers and manufacturing conditions, for example, the nonwoven fabric shown in Fig. 9 can be formed. The dimensions and unit area weights of the groove portions la, lb and the convex portions 2a, 2b are in the following ranges. In the groove portion I, the thickness is 0. 05~10mm, preferably 〇. 1~5mm -51 - (48)1343430 Range 'Width 0. 1 to 30 mm, preferably 0. 5~5mm The area is 2~9〇〇g/m2, preferably 1 0~9〇g/m2, 2a, 2b, thickness 0. 1 to 15 mm, preferably 0. 5 -' width 0. 5~3〇mm, preferably 1. The range of 0 to 10 mm is 5~l〇〇〇g/mz, preferably 1〇~i〇〇gsm. Range, unit range. In the range of convex 10 m m, the unit area is enclosed, but not limited

5-2-2. Blowing means The blowing portion 910 can change the height and the like of the concave portion (groove portion) which is mainly formed of a gas and which is not properly adjusted. For example, it is set so as to automatically change the flow channel portion or the like to form a meandering shape (wavy shape, zigzag shape) or the like by adjusting the discharge amount of the fluid mainly composed of gas and appropriately adjusting the shape of the groove portion and the opening portion. pattern. The flow angle of the fluid into the fiber web 100 can be angled toward the moving direction F of the fiber web 100 (production direction or direction of the opposite direction of the anti-body at a predetermined angle toward the flow direction of the production line in the direction of the partition, the convex portion The shape can be made. In addition, the ejection time can be mainly perpendicular to the gas structure or in the direction of the line flow. 5 - 2 - 3 · Heating means The constituent fiber method of forming the non-woven fabric 116 having the opening portion includes, for example, a pinning method, a spunbonding method, a solvent bonding, a thermal bonding using a point bonding method or a hot air method, and the like. In the subsequent fiber alignment, the shape of the groove, the opening, or the projection of the fiber unit area is determined by the joining method of the hot air method 101, and it is preferable to maintain the adjustment. For example, it is preferable to heat-treat the heater portion 950 using the hot air method at -52-(49)(49)1343430. 5-2-4. Other non-woven fabrics n5 heated by the heater portion 950, by forming a continuous conveyor 940 with the conveyor 930 in a predetermined direction F, for example, moving to a step of cutting the nonwoven fabric 115 into a predetermined shape With the take-up step. Similarly to the conveyor 930, the conveyor 940 includes a conveyor belt portion 949, a rotating portion 941, and the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a plan view of a nonwoven fabric according to a first embodiment of the present invention. Fig. 1B is a bottom view of the nonwoven fabric of the first embodiment of the present invention. Fig. 2 is a perspective cross-sectional view showing the nonwoven fabric of the first embodiment. Fig. 3A is a plan view of the mesh supporting member of the first embodiment. Fig. 3B is a bottom view of the mesh supporting member of the first embodiment. Figure 4 is a perspective view of the fiber web. Fig. 5 is a side view for explaining the nonwoven fabric manufacturing apparatus of the first embodiment. Fig. 6 is a plan view for explaining the nonwoven fabric manufacturing apparatus of Fig. 5 〇 Fig. 7 is an enlarged perspective view of a region Z of Fig. 5. Fig. 8 is a bottom view of the blowing portion of Fig. 7. Fig. 9A is a plan view of the nonwoven fabric of the second embodiment. Fig. 9B is a bottom view of the nonwoven fabric of the second embodiment. -53- (50) (50) 1343430 Fig. 10 is a perspective cross-sectional view of the nonwoven fabric of the second embodiment. Fig. 1A is a plan view of the nonwoven fabric of the third embodiment. Fig. 1 1 B is a cross-sectional view of the nonwoven fabric of the third embodiment. Fig. 12A is a perspective sectional view showing an example of use of the nonwoven fabric of the present invention. Fig. 12B is a partially enlarged view of Fig. 12A. Fig. 13A is a perspective sectional view showing an example of use of the nonwoven fabric of the present invention. Fig. 13B is a partially enlarged view of Fig. 13A. Fig. 14 is a view showing an example of use of the nonwoven fabric of the present invention. Fig. 15A is a perspective sectional view showing an example of use of the nonwoven fabric of the present invention. Fig. 15B is a partially enlarged view of Fig. 15A. [Description of Symbols of Main Components] 1. 1 a, 1 b : groove portions 2, 2a, 2b: protruding portions 3a' 3b, 3c: openings 4a, 4b: connecting portion 1 〇: projections 1 4, 16 1 8 : one side edge portion 1 5, 17 7 , 1 9 : the other side edge portion 90 : non-woven fabric manufacturing device 1 0 0 : fiber web - 54 - (51) (51) 1334330 1 0 1 : fiber 115, 116, 140, 150: non-woven fabric 3 00: mesh supporting members 301, 302: thread 3 0 3 : hole portion 3 04 : intersection portion 3 1 0 : surface sheet 3 1 1 : intermediate sheet 3 2 0 : outer covering material 9 1 0 : blowing portion 9 1 3 : discharge port 9 1 5 : air suction portion 920 : air supply pipe 930 , 940 : conveyors 931 , 933 , 941 : rotating portion 93 9 , 949 : air permeable conveying belt portion 9 5 0 : Heater unit F : Production line flow direction LD : Long side direction WD : Width direction TD : Thickness direction. -55-

Claims (1)

1343430 Patent application No. 096120382 Patent application for revision of the scope of patent application in the Republic of China December 10, 1999, the scope of application for patents 1 - an absorbent article, having: a plurality of openings formed along the first direction, from the foregoing When viewed in the second direction orthogonal to the one direction, one side edge portion is provided as one of the vicinity of the side edge of the mouth portion, and the opening portion is interposed between the one side edge portion and the other side region near the opening side edge. The other side edge portion is provided; the one side edge portion has a higher fiber density than the other side edge portion; and the absorbent article has a plurality of groove portions extending in the first + direction on one side of the absorbent article a plurality of portions extending in the first direction so as to be adjacent to the previous groove portion on the one surface side; and the plurality of openings are formed along the plurality of groove portions; the absorbent article includes: a first connection portion between the first opening portion and the second opening portion adjacent to the plurality of openings, and a fiber between the first and second openings; a fiber density ratio of the first connection portion Said other side of the higher edge portion of the first opening portion. 2. The absorbent article of claim 1, wherein the one side edge portion has a higher fiber unit area than the other side edge portion.曰 Correcting the opening portion of the opening portion along the plurality of the plurality of convex portions in the foregoing, the first 1334430 3. The adolescent product according to the patent application range 笫i or 2, wherein, in the second The one side edge portion of the opening portion has a higher content of fibers aligned in the first direction than a fiber having a direction in the second direction. The absorbent article according to claim 1 or 2, wherein the content of fibers aligned in the second direction in the first connecting portion is higher than the content of fibers in the first direction. . The absorbent article according to claim 1 or 2, wherein the first connecting portion has a fiber unit area which is higher than the other side edge portion of the first opening portion. 6. The absorbent article according to claim 1 or 2, wherein the first plurality of openings are arranged on the opposite side of the second opening and adjacent to the first opening a third connecting portion formed by the opening portion and the fiber between the first opening portion and the third opening portion; wherein the second connecting portion has a higher fiber density than the other side edge portion of the first opening portion . 7. The absorbent article according to claim 6, wherein the one side edge portion of the second opening portion and the one side edge portion of the first opening portion are located on opposite sides of each other in the second direction The one side edge portion of the third opening portion and the one side edge portion of the first opening portion are located on opposite sides of each other in the second direction; and the region having a higher fiber density than the other side edge portion That is, the one side edge portion of the second opening portion, the first connecting portion, the one side edge portion of the second - 1343430 1 opening portion, the second connecting portion, and the third opening portion One side edge forms a continuous meandering shape. 8. The absorbent article according to claim 6, wherein the first connecting portion has a fiber density of 0.05 g/cm3 or more and at least one of the first opening portion and the second opening portion. The fiber density of the other side edge portion of the opening portion is 1.1 times or more; the fiber density of the second connecting portion is 〇.5 g/cm3 or more, and is the first opening portion and the second opening. The other side edge portion of at least one of the openings has a fiber density of 1.1 or more. 9. The absorbent article according to claim 6, wherein the content of the fibers aligned in the second direction of the one side edge portion of the third opening portion is larger than the fiber aligned in the second direction. The absorbent article according to the sixth aspect of the invention, wherein the content ratio of the fibers aligned in the second direction is φ toward the first direction in the second connecting portion. The fiber content is higher. 11. The absorbent article according to claim 6, wherein the second connecting portion has a fiber unit area which is higher than the other side edge portion of the first opening portion. 1. The absorbent article according to claim 6, wherein the fiber area per unit area of the one side edge portion of the first opening portion and the fiber unit area of the one side edge portion of the second opening portion are heavier The fiber basis weight "all of the one edge portion of the third opening portion is 15 to 25 〇g/m2" and is the -3,434,430 fiber of the other side edge portion of the first opening portion. The weight per unit area, the weight of the fiber area per unit side of the second opening portion, and the fiber unit area of the other side edge portion of the third opening portion are one-to-one times or more. 13. The absorbent article of claim 1 or 2, wherein the plurality of openings are each substantially circular or substantially elliptical. 1 . An absorbent article comprising an absorbent article comprising a density-changing region in which fiber density is continuously or intermittently changed, wherein: the density-changing region is provided with a mechanical flow along the manufacturing of the absorbent article. The plurality of high-density regions extending in the first direction in the same direction are plural; the high-density region having a C-shaped high fiber density on one side viewed from the second direction orthogonal to the first direction The density area is counted in multiples. 1 5 · If you apply for the absorbent article in item 14 of the patent scope, The high-density region includes a plurality of meandering high-density regions extending in a serpentine shape in the first direction.