JP2019119954A - Fiber nonwoven fabric sheet - Google Patents

Abstract

To provide a fiber nonwoven fabric sheet good in touch and having improved designability while being hardly torn even when it is stretched in a first direction.SOLUTION: The wipe sheet 10, that is a fiber nonwoven fabric sheet, has a thickness direction Z, a first direction X and a second direction Y crossing the first direction X, and a first face 11 and a second face 12 opposing in the thickness direction Z, and is formed by entangling constitutional fibers. The fiber nonwoven fabric sheet 10 has a concave line 18 recessed to a second face 12 side in a first face 11 and formed by entanglement of fibers. The concave line 18 has a second part 82 extending in the first direction X and a first part 81 extending in the second direction Y. The second part 82 has a fiber orientation in the second direction Y. In the first part 81, the number of fibers per unit area along the second direction Y is fewer than the number of fibers per unit area along the second direction Y in the second part 82.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a nonwoven fibrous sheet formed by interlacing fibers.

  Conventionally, a fiber non-woven sheet formed by interlacing constituent fibers is known. For example, Patent Document 1 discloses a concavo-convex pattern formed by embossing (debossing) processing under heat and pressure in a manufacturing process of a fiber web containing pulp fibers and heat fusion fibers and formed by interlacing fibers. A non-woven fabric sheet is disclosed.

Unexamined-Japanese-Patent No. 2007-8145 (P2007-8145A)

  Since the fiber non-woven fabric sheet disclosed in Patent Document 1 has a concavo-convex pattern shaped by embossing under heat and pressure, it is excellent in design properties, and even after absorbing a liquid, it has a concavo-convex pattern The shape can be maintained.

  However, since the heat-fusion fibers are hardened by heat fusion in the heat-pressed concave portions and partially formed into a film, they become the most hardened portions in the sheet and the flexibility of the fiber non-woven sheet is impaired. As the skin feels worse, it can be broken easily because it can not cope with the deformation of the sheet at the time of wiping. In particular, when such a fiber non-woven sheet is used as a wipes sheet for wiping off excrement adhering to the body, the cured concave portion may cause discomfort to the user's skin such as infants, and some may There was a risk that the user's fingertips such as mothers could be soiled with excrement.

  Also, in Southeast Asian countries such as Indonesia, before using the wipes sheet, the user grabs both sides of the sheet by hand and then pulls the sheet to unfold the area of the sheet by disentanglement with the fiber. May be used. In such a case, when the sheet having the concavo-convex pattern formed by embossing is pulled, a part of the concave portion may be broken.

  Therefore, an object of the present invention is to provide a non-woven fibrous nonwoven fabric sheet which is good in touch, and which is difficult to be broken even when stretched in the first direction while improving the design.

  The present invention has a thickness direction, a second direction intersecting the first direction and the first direction, and a first surface and a second surface opposed in the thickness direction, and intermingling constituent fibers. The present invention relates to a formed fibrous nonwoven sheet.

  The fiber non-woven fabric sheet of the present invention has a concave line formed by fiber entanglement that is concave toward the second surface in the first surface, and the concave line has a second portion extending in the first direction A first portion extending in the second direction, the fiber orientation of the second portion is the second direction, and in the first portion, the number of fibers per unit area along the second direction is The number of fibers per unit area along the second direction in the second portion is smaller.

  In the fiber non-woven sheet, the first portion and the second portion are connected to form a graphic portion. For this reason, the designability of a fiber nonwoven fabric sheet can be improved.

  The concave line in the fiber non-woven fabric sheet has a low density region with a low fiber density at the center in the width direction, and has a high density region with a higher fiber density than the low density region on both sides in the width direction. For this reason, it is possible to provide a fibrous nonwoven fabric sheet in which the low density area in the recess is easily extended.

  The high density region in the fibrous non-woven sheet exists along the concave line, and the high density region has a protrusion projecting to the second surface. Therefore, the surface of the first surface has a recess, while the surface of the second surface has a protrusion. Therefore, while the first surface can be used to wipe away the foreign matter that is likely to come off, the foreign matter can be cleaned while being put in the recess, while the second side can be used to wipe away the foreign matter when wiping away the adhered foreign matter. be able to.

  The non-woven fiber non-woven sheet comprises a first fiber layer forming the first surface, a second fiber layer forming the second surface, and a hydrophilic property located between the first fiber layer and the second fiber layer. And an intermediate fiber layer containing fibers, and by applying a tensile force in the first direction, the fiber entanglement is unwound in the concave line and the hydrophilic fiber of the intermediate fiber layer is formed on the surface of the first surface. Is exposed. For this reason, when using a fiber nonwoven fabric sheet in a wet state, since a pulp fiber is not exposed outside before applying tensile force, it can suppress that a medical fluid absorbed by pulp fiber volatilizes.

  The said 1st fiber layer in a fiber nonwoven fabric sheet is mainly comprised from hydrophobic fiber. For this reason, when the fiber non-woven fabric sheet is used in a wet state, since the pulp fiber is surrounded by the hydrophobic first fiber layer and is not exposed to the outside before applying the tensile force, the chemical solution absorbed by the pulp fiber is volatilized It is possible to suppress

  The water repellent treatment is applied to the surface of the first fiber layer in the fibrous nonwoven fabric sheet. For this reason, when the fiber non-woven fabric sheet is used in a wet state, the pulp fiber is absorbed by the pulp fiber because it is surrounded by the first fiber layer subjected to the water repellent treatment and is not exposed to the outside before applying tensile force. It is possible to suppress the volatilization of the chemical solution.

  The nonwoven fibrous sheet is for wipes used in a dry or wet state. By this, the sheet | seat for wipes which has the effect mentioned above can be provided.

  The fiber non-woven fabric sheet according to the present invention has a concave line formed by fiber entanglement, which is concave toward the second surface in the first surface, so that the designability can be improved and the filmized concave portion is possessed. Since the fiber nonwoven fabric sheet is stretched in the first direction, it is not easily broken. In addition, while the fiber orientation in the second portion is in the second direction, in the first portion, the number of fibers per unit area in the second direction is in the unit area in the second direction in the second portion Less than the number of fibers in For this reason, when the second direction is the wiping direction, the tensile strength of the first portion is smaller than the tensile strength of the second portion. Therefore, after wiping off, the concave shape of the second portion is less likely to collapse, while the concave shape of the first portion is slightly more likely to collapse. Therefore, the change after the wiping is different depending on the second portion extending in the first direction and the first portion extending in the second direction.

The drawings illustrate specific embodiments of the present invention and include not only the essential features of the invention, but also optional and preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of a wipes sheet shown as an example of the fiber nonwoven fabric sheet which concerns on this invention. Top view of wipes sheet. (A) Sectional drawing in alignment with III (a)-III (a) of FIG. (B) Sectional drawing in alignment with III (a)-III (a) of FIG. Explanatory drawing which shows the state which the user hold | gripped both sides of the wipes sheet | seat, and was pulled to 1st direction. (A) A plan view of the wipes sheet after being pulled in the first direction. (B) Sectional drawing in alignment with V (b)-V (b) of FIG. (A) The enlarged view of the area | region enclosed by VI (a) of FIG.3 (b). (B) The enlarged view of the area | region enclosed by VI (b) of FIG. Explanatory drawing which shows the measurement of a tension test. The perspective view of the water jet process in a part of manufacturing apparatus of a wipes sheet. (A) In the suction drum, the enlarged view of the fiber web on the linear convex part before water flow is injected. (B) In the suction drum, the enlarged view of the fiber web on the convex part in the line after water flow was injected.

  Referring to FIGS. 1 to 3, a wipes sheet (wipe sheet) 10 shown as an example of the fiber non-woven sheet of the present invention is a bulky and flexible sheet formed by interlacing constituent fibers, which cross each other A first direction X and a second direction Y orthogonal to each other, a thickness direction Z intersecting (orthogonal) to the first direction X and the second direction Y, and a first surface 11 facing each other in the thickness direction Z And a second surface 12. In the present specification, the first surface 11 is also referred to as a first wiping surface, and the second surface 12 is also referred to as a second wiping surface.

  The wipes sheet 10 has a substantially rectangular shape and is opposed to each other in the first direction X with the first end 10a and the second end 10b extending in the first direction X so as to face each other in the second direction Y. It has an outer peripheral edge composed of a first side edge 10c and a second side edge 10d extending in the second direction Y.

  The wipes sheet 10 is used in a dry state or a wet state, and can be used, for example, in disposable butting sheets, disposable cleaning sheets, disposable towels and the like. Moreover, the fiber non-woven fabric sheet according to the present invention is not limited to wipes, but is suitably used as a sheet material constituting a surface sheet etc. disposed on the skin facing surface side of sanitary products such as sanitary napkins, disposable diapers and breast milk pads. It can be used.

  When the wipes sheet 10 is used as wet wipes, examples of agents to be impregnated with the wipes include surfactants, moisturizers, cooling agents such as ethanol for giving a refreshing feeling to the skin, emollients, PH A modifier, a fragrance, an antioxidant, a chelating agent, a plant extract, an anti-browning agent, an anti-inflammatory agent, a skin activator, an astringent and the like can be used alone or in combination.

  Referring to FIG. 3, the wipes sheet 10 includes a first fiber layer 21 forming the first surface 11 side, a second fiber layer 22 forming the second surface 12 side, the first fiber layer 21 and the second fiber layer 21. And an intermediate fiber layer (third fiber layer) 23 positioned between the fiber layer 22 and the fiber layer 22. The first fiber layer 21, the second fiber layer 22, and the intermediate fiber layer 23 have a multi-layered structure in which fibers constituting them are three-dimensionally entangled with each other to be composited.

  A mixed fiber web of hydrophilic fibers and synthetic fibers can be used for the first fiber layer 21 and the second fiber layer 22. As a material of a hydrophilic fiber, a water absorption fiber is preferable, More preferably, regenerated fibers, such as a rayon fiber, cotton fiber, etc. can be used. As synthetic fibers, polyester fibers such as polyethylene terephthalate (PET), polyolefin fibers such as polypropylene (PP), polyethylene (PE) fibers and core-sheath type composite fibers using these fibers are used. be able to. As the material for forming the sheath portion of the composite fiber, one having a melting temperature lower than that of the material for forming the core portion is used.

  Such core-sheath type composite fibers include, for example, combinations of polyethylene and polypropylene, polyethylene and polyester, and polypropylene and polyester. The "synthetic fiber" is one in which the material of the fiber itself is hydrophobic, and also includes one obtained by treating the material with a hydrophilizing agent. As a hydrophilization treatment of the fiber which consists of the material, what attached the hydrophilizing agent (oil agent) to the fiber surface, or what made the fiber contain a hydrophilizing agent (oil agent) is mentioned.

  In the present embodiment, in the first fiber layer 21 and the second fiber layer 22, preferably, fibers in which rayon fibers and PET (polyethylene terephthalate) fibers are mixed at a ratio (mass%) of 20:80 to 80:20 It is formed from the web. Thus, by mixing rayon fibers which are regenerated fibers in addition to PET fibers which are thermoplastic resin fibers, even if the amount of fibers in the concave line 18 which forms the pattern area 40 is small, familiarity with a certain amount of liquid The ease can be secured. PET fiber is a kind of polyester fiber having the largest production amount among synthetic fibers and is excellent in strength, heat resistance, water resistance, acid resistance, alkali resistance, etc., and is suitable as a sheet material of wipes sheet is there.

  Although the first fiber layer 21 and the second fiber layer 22 are mainly composed of hydrophobic fibers, they can be said to be hydrophobic layers, and the intermediate fiber layer 23 is mainly composed of hydrophilic fibers, so that they are hydrophilic. It can be said that it is a layer.

  The intermediate fiber layer 23 is formed of hydrophilic fibers such as rayon, cotton and pulp, preferably pulp fibers, and the pulp fibers used are wood pulp in addition to commonly used hardwood and softwood wood fibers. Plant fibers other than fibers, synthetic fibers (preferably those that have been subjected to a hydrophilization treatment), and the like can be combined. Pulp fibers have short fibers, and the number of fibers per unit area is large, and the whiteness of the intermediate fiber layer 23 is relatively high, and the visibility of the pattern area 40 can be enhanced. In addition to pulp fibers, manila hemp, mochi, three mochi, and linter pulp may be mixed.

The thickness dimension D1 of the wipes sheet 10 is about 0.3 to 1.0 mm, the weight is about 40 to 60 g / m ² , and the apparent density is 0.03 to 0.09 g / cm ³ . For measurement of the thickness dimension D1 of the wipes sheet 10, a thickness measurement device (manufactured by PEACOCK, measurement surface φ 44 mm, measurement pressure 3 g / cm ³ ) was used.

  The fineness of rayon fibers and PET fibers used for the first fiber layer 21 and the second fiber layer 22 is 1.5 to 2.5 dtex, and the fiber length of rayon fibers and PET fibers is 20 to 50 mm, preferably It is 35-45 mm. The fiber length of the pulp fibers used for the intermediate fiber layer 23 is 1 to 10 mm, preferably 2 to 5 mm. The average denier of the constituent fibers of the first and second fiber layers 21 and 22 forming the first and second surfaces of the wipes sheet 10 and the average fiber length are made larger than the constituent fibers of the intermediate fiber layer 23 (Fiber unevenness) becomes good, and the difference in the amount of fibers of the concave line 18 constituting the pattern area 40 can be suppressed, and the required visibility and shape stability can be secured.

  Referring to FIGS. 2 and 3, the wipes sheet 10 has a graphic area 40 formed of a concave line 18 which is concave toward the second surface 12 in the first surface 11. The concave line 18 is formed by entanglement of constituent fibers, and has a bottom 18a with a bottom and both sides 18b surrounding the bottom 18a like a wall in the cross section of the concave line 18 shown in FIG. 3 (b) Have.

  “Concave line is bottomed” means that a continuous opening is not formed in the extending direction of the concave line 18, and the large and small fibers formed by the reorientation of the fiber in the fluid injection process Even if there is a gap, it can be said to be bottomed if a continuous hole is not formed in the extending direction. Thus, since the concave line 18 is bottomed, for example, when the wipes sheet 10 is used as a wipe sheet, excrement (foreign matter) that has entered the concave line 18 after wiping is used by the user Can be prevented from adhering to the finger of the patient.

  Referring to FIG. 3 (b), the wipes sheet 10 has a higher fiber density than the low density area 51 located at the bottom 18 a of the concave line 18 and the low density area 51 located at least on both sides of the low density area 51. A high density region 52 and a medium density region 53 having a fiber density higher than the low density region 51 and a fiber density lower than the high density region 52 are provided. That is, the fiber density is the lowest at the bottom 18 a of the concave line 18, and the high density area 52 having the highest fiber density is located at least on portions located on both sides so as to surround the outer peripheral edge of the bottom 18 a.

  The wipes sheet 10 has such a fiber density difference, and the high density area 52 is positioned so as to surround the bottom 18a of the concave line 18 consisting of the low density area 51, and a contrast due to the density difference is formed. In the appearance as well, the dense region 52 is visually recognized so as to border the outer peripheral edge of (the bottom 18a of) the concave line 18 due to the density of fibers, and the contour of the concave line 18 can be clearly seen.

  Further, the high density region 52 has a projecting portion 54 that protrudes outward more than the middle density region 53 on the second surface 12 side. As described above, since the high density region 52 has a three-dimensional shape that protrudes outward on the second surface 12 side, the user viewed from the second surface 12 side where the concave line 18 is not formed. Even in this case, the contour of the concave line 18 can be grasped. Therefore, in combination with the contrast due to the color density due to the density difference between the high density region 52 and the low density region 51, the contour of the concave line 18 can be seen more clearly from the second surface 12 as well as the first surface 11. It can be done.

  When the wipes sheet 10 is used in a wet state, pulp fibers having high water absorbability are positioned in the intermediate fiber layer 23 interposed between the first fiber layer 21 and the second fiber layer 22. Before the pulp fibers are not exposed to the outside, the chemical solution absorbed by the pulp fibers can be prevented from volatilizing.

  The bottom 18a of the concave line 18 of the wipes sheet 10, that is, the content (% by weight) of pulp fibers located in the low density area 51 is the content (% by weight) of pulp fibers in the high density area 52 and the medium density area 53 It is smaller than). It can be said that the liquid retention is relatively low because the pulp fiber content in the low density region 51 is relatively low, but the bottom 18 a of the concave line 18 is not a portion directly in contact with the surface to be wiped. The tensile strength is improved due to the dry state compared to the other regions 52 and 53 without requiring high liquid retention, and it is more difficult to break.

<Method of measuring fiber density of pulp fiber>
A portion of the wipes sheet 10 is cut with a cutting tool such as a razor and used as a sample, and the sheet cut surface of the sample is a commercially available scanning electron microscope (for example, Real Surface View Microscope VE-7800 manufactured by Keyence Corporation) The observation was enlarged using the name)). The wipes sheet 10 was cut along a cut line extending in a first direction X orthogonal to the second direction Y (machine direction MD in the manufacturing process) so as to intersect the concave lines 18 of the pattern area 40. In addition, 70 to 300 times magnified observation is performed so that about 20 to 70 fibers appearing on the cut surface of the sheet can be measured, and constant in each of the low density area 51, the high density area 52, and the medium density area 53 The number of cross-sections of pulp fibers per area (about 0.5 mm ² ) was counted.

Next, a value obtained by converting the measured value into the number of cross sections of pulp fibers per 1.0 mm ² was taken as the fiber density. The position of the cut line of wipes sheet 10 was changed to obtain a plurality of samples, and the same measurement was performed three times for each sample, and the average was taken as the fiber density of pulp fibers in each region.

  The symbol area 40 has a first symbol portion 41 and a second symbol portion 42 which have different designs. The first symbol portion 41 has a substantially circular outline 41A formed from the concave line 18, and a substantially star-shaped pattern 41B surrounded by the outline 41A. The second symbol portion 42 has a substantially elliptical outline 42A, and a pattern 42B surrounded by the outline 42A, in which a plurality of characters are arranged in a plurality of lines aligned in the second direction Y. The first symbol portion 41 and the second symbol portion 42 are located side by side at the approximate center in the first direction X.

  The symbol region 40 further has a first symbol portion 41 and a second symbol portion 42 cut, and further has a third symbol portion 43 which is a part of them, and a heart-shaped relatively small fourth symbol portion 44. . The first symbol part 41 and the second symbol part 42 have a relatively large area on the first surface 11, and can exhibit a complete design by itself to impress the user It can be said that it is the main symbol (main symbol). On the other hand, the third pattern portion 43 is incomplete and does not exhibit any design property by itself, and the fourth pattern portion 44 is relatively small, and a design which impresses the user by itself The third symbol part 43 and the fourth symbol part 44 can be said to be secondary symbols (sub-symbols) because they do not exhibit the nature. The third symbol portion 43 and the fourth symbol portion 44 are located outside so as to surround the first symbol portion 41 and the second symbol portion 42. Thereby, the design of the wipes sheet 10 can be improved.

  The first symbol portion 41 and the second symbol portion 42 have independent and closed outlines 41A and 42A, and the outlines 41A and 42A are the outer peripheral edge of the wipes sheet 10 (first end edge 10a, second end edge 10b, an outer peripheral edge defined by the first side edge 10c and the second side edge 10d). Here, that the outlines 41A and 42A of the first design portion 41 and the second design portion 42 are independent extends to the outer peripheral edge of the cloth like the ground pattern of the woven fabric and grasps the entire outer shape It is not a continuous pattern that can not be used, but means one that is located away from the outer periphery of the wipes sheet 10 and has completely independent design. Therefore, for example, as in the case of the third design portion 43, those whose outline 43A can not reach the outer periphery of the sheet and can not grasp the overall design do not correspond to independent outlines.

  In addition, when the outlines 41A and 42A of the first symbol 41 and the second symbol 42 are closed, the outlines 41A and 42A extend continuously or discontinuously so as to surround the symbols 41B and 42B. Means to The outlines 41A and 42A may have various known shapes such as a circle, an ellipse, a triangle, and a polygon, as long as the outlines 41A and 42A surround the symbols 41B and 42B.

  The symbol 41B of the first symbol 41 and the symbol 42B of the second symbol 42 are preferably designed to be recognized by the user at first glance. Character, logos for promoting a company, various well-known design designs, letters, figures, symbols, and designs having messages by combinations thereof. The characters include alphabetic characters, hiragana characters, katakana characters, kanji characters and characters of foreign languages (eg, Indonesian characters). The fourth design portion 44 does not have to have a design that can be recognized by the user at first glance, and in addition to the illustrated example, it has a star shape, an annular shape resembling a bubble, etc. It may be.

  In the wipes sheet 10, the first symbol portion 41 and the second symbol portion 42 are main design regions having a three-dimensional shape, and can also be said to be wiping regions for wiping foreign substances such as excrement and dust. That is, when the wipes sheet 10 is used, with the first surface 11 as the wiping surface, the dirt attached to the surface to be wiped such as the body or table is an edge of the both sides 18b of the concave line 18 on the first surface 11 side ( Edges 18 c can be used to effectively wipe away dirt.

  In order for the user to press the first symbol 41 or the second symbol 42 with a finger to wipe off dirt attached to the surface to be wiped efficiently, the first symbol 41 and the second symbol 42 have required sizes. It is preferable to have an area of, for example, at least 10% or more of the surface area of the wipes sheet 10. On the other hand, since the fourth symbol portion 44 has a relatively small area, it does not function as a main wiping area.

  In general, a spunlace non-woven fabric formed by hydroentangling treatment is suitably used as the wipes sheet in consideration of bulkiness and touch, and the sheet surface is preferably used to improve its design and wiping properties. It is known to impart a three-dimensional pattern that is entirely raised from the sheet surface by fiber entanglement, and to give an uneven pattern such as a geometric pattern or a lace pattern.

  When the wipes sheet is provided with a three-dimensional pattern raised from the sheet surface, the designability is further improved as compared to the printed pattern, and the raised outer peripheral edge can wipe off the dirt. However, since the design itself has a raised shape, it may be in sliding contact with the surface to be wiped off at the time of wiping, and the form of the design may be broken due to friction.

  On the other hand, in the case where the wipes sheet has a continuous uneven pattern, it is not completely independent as a design, so that the design can not be strongly impressed to the user. In addition, since it is continuously applied in the machine direction by a fluid at the time of manufacture, it can exhibit its designability only by having a completely independent aspect, for example, high design of characters, characters, symbols, etc. It is not possible to adopt one with gender or message nature.

  Furthermore, the wipes sheet may be heat embossed (debossed) to form a pattern having a plurality of concave lines, but in such a case, the constituent fibers are heat-welded by heat embossing to form a concave shape. The inside of the line becomes relatively hard, and the inherent flexibility and texture of the spunlace nonwoven fabric are lost. In addition, when used as a sheet for wiping the buttocks of an infant, the embossed portion may hit the skin and may cause discomfort and irritation, and may be easily broken.

  In the wipes sheet 10 according to the present embodiment, since the concave line 18 forming the pattern area 40 is formed by the entanglement of constituent fibers, the whole nonwoven fabric is formed as compared with the case where it is formed by heat embossing. As soft as it has good feel, it can maintain the flexibility unique to spunlace nonwoven fabrics. Further, since the first design portion 41 and the second design portion 42 have independent outlines 41A and 42A, a design having a completely independent aspect can be adopted, and a simple continuous pattern extending to the sheet outer peripheral edge can be adopted. Compared with, it is possible to improve the aesthetic appearance with excellent design.

  When the pattern area 40 itself is raised, the light may be scattered and its outer contour may be blurred, but since it is formed by the concave line 18, the outer contour is made clearer to the user Can be made to understand. Further, at the time of wiping, since the portion other than the concave line 18 is in direct sliding contact with the surface to be wiped, the shape of the concave line 18 is not broken by friction and the pattern area 40 is not largely deformed.

  In the first symbol 41 and the second symbol 42, the outlines 41A and 42A are closed, and the symbols 41B and 42B are arranged so as to be surrounded by the outlines 41A and 42A. Even when the user pulls or loosens the wipes sheet 10 by deforming the wipes sheet 10 because the designs 41B and 42B are surrounded by the outlines 41A and 42A, the outlines 41A and 42A become the starting point. As the symbol 41B, 42B is deformed, it can maintain its shape. Further, even if the surfaces to be wiped are relatively strongly rubbed at the time of wiping and the shapes of the outlines 41A and 42A are broken, it is possible to suppress the breakage of the shapes of the designs 41B and 42B surrounded by them.

  The first symbol 41 and the second symbol 42 are different in design from each other, and the total area of the concave line 18 is different from each other. As a result, since the symbol parts 41 and 42 having different storage capacities for foreign matter exist, the user can select the symbol parts 41 and 42 according to the amount of contamination.

  In addition, a third symbol portion 43 and a fourth symbol portion 44 are located around the first symbol portion 41 and the second symbol portion 42 which are main wiping areas. Therefore, when the wipes sheet 10 is broken down, the third symbol part 43 and the fourth symbol part 44 are deformed as a starting point, and the first symbol part 41 and the second symbol part 42 located at the center are deformed. It can be said that it can be suppressed.

  It is preferable that the 1st pattern part 41 and the 2nd pattern part 42 have the curved concave line 18 from a viewpoint of wiping off property and an aesthetics. Also in the present embodiment, the outlines 41A and 42A are curved, and the patterns 41B and 42B also have curved portions. Thus, the first design portion 41 and the second design portion 42 having a curved concave line 18 can give a soft and good impression on the skin, and can be deformed according to the shape of the surface to be wiped. For example, the pattern portions 41 and 42 can be deformed along the narrow and curved grooves of the surface to be wiped to wipe off dirt.

  The user can easily recognize that the first surface 11 is a wiping surface by positioning the symbol area 40 including the concave line 18 on the first surface 11 side. The first symbol 41 B and the second symbol 42 B are symbols and characters such as notes, and the description is correct when viewed from the first surface 11 side, and the description is incorrect when viewed from the second surface 12 side. The use of the symbols and characters makes it possible to easily recognize that the first surface 11 is a regular wiping surface. Therefore, it can be said that the symbol area 40 also has a function of guiding the user to use the first surface 11 as a wiping surface.

  As described above, the first symbol portion 41 and the second symbol portion 42 of the symbol region 40 can function as a wiping region, but the third symbol portion 43 and the fourth symbol portion 44 are also formed from the concave line 18 It has a certain degree of wiping properties. Therefore, the user can appropriately select and use one of the first to fourth symbol parts 41 to 44 according to the size of the stain at the time of wiping.

  In the first symbol 41 and the second symbol 42, the concave lines 18 (first line (outside symbol)) forming the outlines 41A and 42A are the concave lines 18 (second line) forming the symbols 41B and 42B. (Inside pattern)) It is wider as a whole. That is, the width dimension with respect to the extension direction of the 1st line which forms outline 41A, 42A is larger than the width dimension with respect to the extension direction of the 2nd line which forms pattern 41B, 42B. Thereby, the design of the wipes sheet 10 can be improved. The relatively wide outlines 41A, 42A allow the user's attention to be drawn to draw out the figures 41B, 42B enclosed by the user. In addition, when wiping off, foreign matter first enters the concave line 18 of the outlines 41A and 42A located outside, and foreign matter can be suppressed from entering the concave line 18 of the patterns 41B and 42B located inside. Even after wiping off the dirt, it is possible to suppress the decrease in the clarity of the designs 41B and 42B located inside the outlines 41A and 42A. Moreover, after wiping away dirt roughly by outline 41A, 42A at the time of wiping off, it is possible to scrape away persistent dirt by relatively narrow narrowly-packed patterns 41B, 42B located in the inside .

  In the wipes sheet 10, at least one of the plurality of symbol portions 41 to 44 is present in the first direction X at an arbitrarily selected portion in the second direction Y. If the user moves the finger in the first direction X, for example, if the finger is in contact with the portion where the symbol portions 41 to 44 do not exist, the portion where any of the symbol portions 41 to 44 is present Therefore, if there is dirt adhering, it is possible to easily change the place where the finger is in contact. In the wipes sheet 10, at least one of the plurality of symbol portions 41 to 44 is present in the second direction Y in an arbitrarily selected portion in the first direction X. For this reason, the change of the part which a finger hits is much easier.

  The pattern area 40 has a plurality of first to fourth pattern portions 41 to 44 having different designs, thereby dividing the dimensions of the wipes sheet 10 in the first direction X into two equal parts, and the second virtual line P It has an asymmetrical design with respect to a second imaginary line Q which bisects the dimension in the direction Y. Therefore, the user can be made to recognize the longitudinal direction and the width direction of the wipes sheet 10. Thus, as long as the vertical and horizontal directions of the wipes sheet 10 can be recognized, the symbol area 40 may be asymmetric with respect to any one of the first virtual line P and the second virtual line Q.

  In the wipes sheet 10, the second direction Y corresponds to the machine direction in the manufacturing process, and the first direction X corresponds to the direction intersecting the machine direction, and the constituent fibers are mainly oriented in the second direction Y. . Therefore, it is preferable that the wiping direction is a direction in which the fibers are oriented, and the sheet strength is along the second direction Y higher than the first direction X, and by arranging the pattern areas 40 asymmetrically, the second direction Y is the wiping direction It can be recognized as (vertical direction). Moreover, it can also be made to be wiped off in the second direction Y by arranging the design element so that the second direction Y becomes the vertical direction like the pattern 42B of the second symbol part 42. In such a case, it can be said that the second symbol portion 42 is asymmetric with respect to an imaginary line (not shown) which divides the dimension in the first direction X into two equal parts.

  Referring again to FIG. 2, the concave line 18 forming the symbol area 40 has a second portion 82 extending in the first direction X and a first portion 81 extending in the second direction Y. The fiber orientation in the second portion 82 is in the second direction Y. Therefore, when the second direction Y is the wiping direction, the required tensile strength is exhibited, and the concave shape of the concave line 18 is not broken even after the wiping. On the other hand, in the first portion 81, the number of fibers oriented in the second direction Y is smaller than that in the second portion 82 per unit area. For this reason, when the second direction Y is the wiping direction, the tensile strength of the first portion 81 is smaller than the tensile strength of the second portion 82. Therefore, when the first portion 81 is compared with the second portion 82, the concave shape of the concave line 18 is slightly broken after wiping. For this reason, the first symbol part 41 and the second symbol part 42 are different in the change mode after wiping by the second portion 82 extending in the first direction X and the first portion 81 extending in the second direction Y. In the present embodiment, the first part 81 and the second part 82 are connected to form the first to fourth symbol parts 41 to 44, but the first part 81 and the second part 82 are shown. And may not be connected.

  Here, the fiber orientation is the direction in which the fibers are flowing in a plan view of the wipes sheet 10, and "the fiber orientation of the second portion 82 is the second direction" is the second portion 82. Of the total weight of the fibers constituting the fiber, in addition to those in which 100% is fiber-oriented in the second direction, 50% or more has fiber orientation in the range of -45 ° to + 45 ° with respect to the second direction Y Including things. Such fiber orientation can be measured by a method known in the field of this kind, for example, a measurement method according to the fiber orientation test method based on the zero distance tensile strength of TAPPI standard method T481. Also, as a simple method, fiber orientation from the tensile strength ratio (first direction X / second direction Y) of the second portion 82 in the first direction X and the second direction Y using a tensile tester described later May be measured.

  The first part 81 is a part extending along the first imaginary line P if it is linear, and the second part is the second imaginary line Q if it is linear It is a part extending along. On the other hand, for example, in the case where the outlines 41A and 42A of the first symbol portion 41 and the second symbol portion 42 have a curved shape, the first portion 81 is a portion that is convex in the first direction X The second portion 82 is a portion convexly bent in the second direction Y.

  For example, in the case of adopting a character design or the like in which the second direction Y is up and down as the symbols 41B and 42B of the first symbol portion 41 and the second symbol portion 42, the outer shape of the upper and lower portions (for example, head and body) The design shape can be maintained even after removal from the packaging package after wiping or, for example, frictional resistance occurs in the second direction Y without losing the outline or the dimensional balance between the upper and lower sides.

  Also in the first portion 81 of the concave line 18, when the second direction Y, which is the direction in which the fibers are oriented, is taken as the wiping direction, the shape is unlikely to collapse and the width tends to be narrow. On the other hand, in the case where the first direction X is the wiping direction, when a force is applied to the concave line 18 in the first direction X which is a direction intersecting the direction in which the fibers are oriented, the width dimension of the first portion 81 Spreads. Therefore, in the case of adopting a character design in which the second direction Y is up and down as the designs 41B and 42B, it is taken out from the packaging package after wiping or when frictional resistance occurs in the first direction X or the second direction Y. In such an aspect, the width dimension is expanded, but the appearance image can be maintained, rather, it can be changed to a rounded character design preferred by infants.

  Although not illustrated, as the patterns 41B and 42B of the first and second symbol portions 41 and 42, an ideal combination of figure design and characters may be employed. For example, in the figure design in which the character has a heart-shaped placard in both hands, the figure design and the letters correspond to each other by arranging letters such as “I love YOU!” In the placard. By recalling the common idea, the design can be improved and the user can be motivated to purchase, and the interest of the user, i.e., the infant can be attracted.

  Also, for example, in addition to the character design of smile, a design consisting of a combination of characters consisting of a part of daily conversation between a mother who is a user such as "Good morning" and "Gochisousama" and infants who are a user is adopted. You can also In this way, it is possible to fix the word in the memory of the infant by adopting a word that the infant has not remembered or has just remembered in the patterns 41B and 42B and repeating it with the parent and child at the time of use. Thus, the symbol area 40 can also be provided with a function as one of the tools capable of creating good communication between the parent and the child through the wipes sheet 10.

  As described above, the wipes sheet 10 has a design with high visibility and excellent uniqueness, so unlike the conventional wipes sheet, the high-quality handkerchief of which the design portion is formed seamlessly. It has an aesthetic appearance like that. Therefore, by realizing differentiation from other products, even if the user is a relatively young woman, it is preferable to carry and use the wipes sheet when going out, without hesitation. Can. Further, when a logo design of a company is adopted as the pattern area 40, the user can be made to recognize the brand effectively, and an excellent advertisement function can be exhibited. Therefore, it can be said that the wipes sheet 10 has both the basic function as wipes and the emotional value which causes the consumer to buy.

  On the first surface 11 side, the portion excluding the concave line 18 is flat, while the concave portion containing the foreign matter is present in the portion where the concave line 18 exists. For this reason, when wiping off on the first surface 11 side, wiping can be performed while containing the foreign matter in the concave line 18.

  On the second surface 12 side, the portion on the opposite side excluding the portion where the concave line 18 exists on the first surface 11 side is flat, while on the opposite side of the portion where the concave line 18 exists on the first surface 11 side There is a protruding portion 54. Two projecting portions 54 are present along the edge of the concave line 18 and extend along the extending direction of the concave line 18. For this reason, when wiping off on the second surface 12 side, wiping can be performed while scraping foreign substances by the projecting portion 54.

  Therefore, the wipes sheet 10 has the first surface 11 and the second surface 12 which have different wiping functions, so that it can cope with various types of dirt (foreign matter).

  Although not shown, when the wipes sheet 10 is used, it may be used by being folded in two with the second surface 12 which is the second wiping surface inside. In such a mode of use, the second surfaces 12 of the folded portions come in contact with each other, and during the wiping operation, the contacting portions may be displaced, and the force may not act sufficiently on the wiping surface . In the wipes sheet 10, the protruding portions 54 of the high density area 52 located on the second surface 12 side function as a stopper that catches on the opposite surface and prevents the sliding of the folded portions, and it takes during the wiping operation Misalignment of the sheets can be suppressed, and sufficient wiping force can be transmitted to the wiping surface.

  In the present embodiment, a plurality of symbol parts 41 and 42 having independent and closed outlines 41A and 42A are present in one wipe sheet 10, but at least in consideration of design and wiping properties, at least It is sufficient that one symbol 41 and 42 exist. Moreover, by having the pattern area 40 of a different design for every wipes sheet 10, when a user takes out from the container in which the some wipes sheet 10 was accommodated, what has a different design one after another can be pulled out. Therefore, the user can pop up while having fun.

  Referring to FIG. 4, the user holds and pulls the both sides with the hands 8 and 9 in the first direction X before using the wipes sheet 10 to untwist the fibers, thereby removing the wipes sheet. It may be used by expanding the width of ten. In particular, in Southeast Asian countries such as Indonesia, not only wipes sheet 10 but also when using wet tissue or kitchen sheet, the sheet is pulled so as to stretch out to check the sheet strength and expand the sheet area May be used. Since the wipes sheet 10 as a whole has the fiber orientation in the second direction Y, when it is pulled in the first direction X, the dimension (width dimension) W1 in the first direction X increases while it is pulled in the second direction Y When this happens, the dimension (length dimension) in the second direction Y slightly increases in size, but the amount of change is small compared to the first direction X.

  Referring to FIG. 5A, when the wipes sheet 10 is pulled in the first direction X, entanglement of fibers is released not only in the pattern area 40 but also in other areas, and the wipes sheet 10 as a whole is The dimension (width dimension) W1 in the first direction X is increased. Specifically, by the application of the tensile forces F1 and F2 in the first direction X, the width dimension W2 of the wipes sheet 10 is 1.1 to 1.5 times the width dimension W1 before being pulled. Have.

  Referring to FIG. 5 (b), since the concave line 18 forming the pattern area 40 is formed by fiber interlacing and is soft and easy to deform, the tensile forces F1 and F2 act to cause the fiber entanglement. As a result, the line width in the first direction X is expanded in the entire concave line 18, and the outer dimensions of the first to fourth symbol portions 41 to 44 increase. Specifically, the width dimension W4 of the first portion 81 in the state where the wipes sheet 10 is stretched by 30% in the first direction X in the wet state is the width dimension W3 of the first portion 81 before being pulled. It is 1.5 to 2.5 times.

  Thus, by pulling in the first direction X, the width dimension W3 of the concave line 18 is expanded to become the width dimension W4 and the dimension is increased, so that the wiping area is increased and the wiping performance is further improved. Also, as in the case of the conventional wipes sheet, when the concave line is shaped by embossing, when the tensile forces F1 and F2 act by curing the fiber and partially forming a film, the thin bottom portion 18a May be broken without being stretched, but since the concave line 18 is formed by fiber entanglement and has extensibility, the fiber entanglement is broken at the bottom 18a when pulled in the first direction X The width dimension W3 is gradually expanded, and it is possible to suppress breakage of a part of the bottom portion 18a.

  The “pulling force in the first direction X” is, in addition to the forces F1 and F2 generated by the user holding the both sides of the wipes sheet 10 in the first direction X and pulling in opposite directions as shown in the example. In the state where one side of the wipes sheet 10 is fixed, the other side may be pulled in a direction away from the one side.

  Further, the width dimension W3 of the concave line 18 is expanded, so that the contours of the first to fourth symbol portions 41 to 44 appear more clearly, and the visibility is improved. Although not shown, for example, before the wipes sheet 10 is pulled in the first direction X, the width W3 of the concave line 18 is relatively small, and when the external form is difficult to see or the overall external appearance is narrow In the case of a distorted design that gives a W, the width dimension W4 is obtained by pulling the wipes sheet 10 in the first direction X, and the outer shape becomes easy to be clearly recognized, and the design that gave a narrow and distorted impression is It can be expanded and changed to a balanced shape.

  Since the second portion 82 is fiber-oriented in the second direction Y, in the first portion 81, the fibers are oriented in the first direction X and the second direction Y, the wipes sheet 10 When the second portion 82 is pulled in the first direction X, the width in the first direction X becomes larger than the width in the second direction Y of the second portion 82. As the width dimension of the first portion 81 in the first direction X is expanded, the outer shapes of the respective symbol portions 41 to 44 become clearer, and the second portion 82 is maintained in its shape. The uniformity of the overall shape of 44 is not greatly disturbed. In addition, when the designs 41B and 42B are character designs or the like in which the second direction Y is up and down, the width can be changed into a rounded shape that the infants and the like prefer.

  Referring to FIG. 6A, before the wipes sheet 10 is pulled in the first direction X, the pulp fibers 28 located in the intermediate fiber layer 23 are exposed to the outside of the hydrophobic first surface 11. Absent. In the wet state of the wipes sheet 10, the pulp fibers 28 constitute an absorption layer that absorbs and holds a drug, and thus, by surrounding by the hydrophobic layer and not being exposed to the outside, the outside air can be obtained. It is not exposed and can prevent drying and suppress the volatilization of the drug.

  Referring to FIG. 6 (b), in the state after the wipes sheet 10 is pulled at least 5% in the first direction X, the fibers constituting the bottom 18 a of the concave line 18 are untwisted to form the intermediate fiber layer 23. A portion of the pulp fibers 28 located in the first fiber layer 21 passes between the fiber gaps of the fibers constituting the first fiber layer 21 and is exposed to the outside from the first surface 11. As described above, when the user uses the wipes sheet 10 in the first direction X, the concave lines 18 become wider and the pulp fibers 28 are exposed to the outside, so that the bottom 18 a is covered. When contacted with the wiping surface, it can be hygienically wiped with the drug absorbed by the pulp fibers 28.

  Thus, in use, in the concave line 18, the surface of the hydrophobic first surface 11 is exposed to pulp fibers and other hydrophilic fibers on the surface of the first surface 11, and the first surface 11 is hydrophobic. By changing from the elastic surface to the hydrophilic surface, the wiping property in the concave line 18 is improved.

  In order to prevent the pulp fibers 28 from drying before use, a water repellent agent such as silicon may be applied to the surface of the first fiber layer 21 forming the first surface 11 to perform water repellent treatment.

  When the surface of the first surface 11 has water repellency, the smoothness is improved, so when the wet wipes sheet 10 is popped up from the storage container, the next wipes sheet 10 is pulled out together ((1) Can be suppressed. In addition, since the concave lines 18 are formed on the first surface 11 of the wipes sheet 10, the contact area of the facing surfaces of the wipes sheets 10 in contact with each other in the laminated state is reduced, thereby further suppressing blurring. It is easy to pull out.

  The wipes sheet 10 has a tensile strength of 0.05 to 1.0 N / 25 mm, preferably 0.15 to 0.5 N / 25 mm at 5% elongation when pulled in the first direction X in a wet state. is there. If the tensile strength in the first direction X is less than 0.05 N / 25 mm, the tensile strength is too low, and when transported in the machine direction in the manufacturing process, part of the bottom portion 18a may break, or When it is pulled in one direction X, there is a possibility that the sheet shape may be broken or a part may be broken because the bottom portion 18a is excessively stretched. If the tensile strength in the first direction X exceeds 1.0 N / 25 mm, the tensile strength becomes too high, and the force to such an extent that the user pulls lightly before use makes the bottom 18 a difficult to stretch and the concave line 18 The width dimension W4 does not expand.

  Moreover, in the wet state, the maximum elongation when pulling the wipes sheet 10 in the first direction X is 2.0 to 3.0 times, and the maximum elongation when pulling the second direction Y is 1. 2 to 1.8 times. Here, the maximum elongation of the wipes sheet 10 is 1.0 times the size of the width dimension W1 before measurement, and the width dimension W1 of the wipes sheet 10 is 100 mm, for example. When the width dimension W2 when pulled to break is 200 mm, the maximum elongation is 2.0 times.

<Method of measuring maximum tensile strength, maximum elongation and width dimension of concave line at tension>
Referring to FIG. 7, after the wipes sheet 10 is impregnated with a drug (water retention rate 250%), the wipes sheet 10 is cut with a cutting tool so that the second pattern portion 42 is positioned at the center in the first direction X. Thus, a strip-shaped test piece 93 having a length of 150 mm in the first direction and a length of 25 mm in the second direction Y was obtained. Of the concave lines 18 forming the second design portion 42 of the test piece 93, a part of both opposing edges (both sides 18b) of the first portion 81 are marked with T1 and T2 with a red pen along them. Before measurement, the separation distance R1 between the marks T1 and T2 was measured with a ruler.

  Next, using a tensile tester (Autograph, model AGS-1kNG, manufactured by Shimadzu Corporation), the test is performed so that the first direction X is in the vertical direction between the fixed chuck 91 and the movable chuck 92. The piece 93 was placed, and the maximum tensile strength and the maximum elongation were measured under the conditions of a chuck distance L1 of 100 mm and a tensile speed of 120 m / min. The maximum elongation in the second direction Y was also measured by the same method by arranging the test piece 93 such that the second direction Y was in the vertical direction (vertical direction) of the tester.

  The movable chuck 92 was moved in a direction away from the fixed chuck 91, and the maximum tensile strength (N / 25 mm) was determined when the distance L1 between chucks was 105 mm (elongation 5%). Further, the tensile strength at the time when the test piece was broken by increasing the distance L1 between chucks was taken as the maximum tensile strength, and the elongation was taken as the maximum elongation (fold). Further, the separation distance R2 of the marks T1 and T2 of the first portion 81 when the distance L1 between chucks is 130 mm (elongation 30%) is measured with a ruler, and the separation distance ratio (R2 / R1) Maximum elongation (fold) was calculated. Even when the wipes sheet is in the dry state, the maximum elongation and the maximum tensile strength in the first direction X and the second direction Y can be determined by the same measurement method.

<Wipes sheet manufacturing method>
The wipes sheet 10 according to the present invention is a production apparatus similar to the non-woven fabric sheet for wipes usually used in this type of field, for example, a fiber web forming unit, a water supply unit for containing water in the fiber web, fibers A manufacturing apparatus including a water jet unit (step), a dewatering unit (dehydrator), and a drying unit (dryer) for confusing and rearranging can be used. The manufacturing apparatus of the wipes sheet 10 and part of the manufacturing process will be described below.

  First, as a base material of the wipes sheet 10, a fiber web formed by laminating fiber aggregates manufactured by various known manufacturing methods is formed. The fiber web may be, for example, a fiber assembly formed by a card method, a fiber assembly formed by an air laid method, a fiber assembly formed by a wet method, a fiber assembly formed by a spun bond method, a meltblown method, etc. Can be stacked and formed. In the present embodiment, the fiber web is formed by the air laid method corresponding to the intermediate fiber layer 23 between the fiber aggregates formed by the card method corresponding to the first and second fiber layers 21 and 22 of the wipes sheet 10 It has a multi-layered structure in which the stacked fiber assembly is interposed.

  The fiber web is preferably pre-watered prior to the water jet process to form the entanglement and concave portions corresponding to the concave lines 18 forming the graphic area 40. By including water in the fiber web before intermingling the fibers in the water jet process, the fiber gap is filled with water and the fiber density is increased. As a result, in the water jet process, it is possible to prevent the fibers from being scattered by the water flow and the fiber density of the fiber web becoming nonuniform, thereby preventing the formation of the fiber web from being disturbed. As described above, in the case of containing water in advance, since it is intended to fill the fiber gap with water, water may be sprayed by a spray without requiring water pressure to move the fibers.

  FIG. 8 is a perspective view of the water jet process 100 for forming in the fiber web 101 a concave portion 122 corresponding to the concave line 18 of the pattern area 40. The water jet process 100 includes a suction drum 106 for holding the fiber web transported in the machine direction MD on the outer circumferential surface, and a nozzle plate 107 for jetting water to the fiber web located on the outer circumferential surface of the suction drum 106. The fiber web 101 has a first surface 101 a facing the nozzle plate 107 on the outer peripheral surface of the suction drum 106 and a second surface 101 b opposite the outer peripheral surface of the suction drum 106 located on the opposite side.

  The suction drum 106 includes a shaped support 106 a having linear protrusions 120. The outer peripheral surface of the shaping support 106a is in the form of a mesh having a plurality of suction tubes 121, and the fiber web 101 is drawn to the shaping support 106a by rotating the shaping support 106a around the axis K1. While being held on the surface, it is transported to a dehydrator (not shown) via a downstream transport means (not shown). The nozzle plate 107 jets water toward the first surface 101 a side of the fiber web 101 held on the outer peripheral surface of the suction drum 106 to cause the fibers to be entangled with each other and is located on the outer peripheral surface of the shaping support 106 a. By pressing the linear convex portion 120, a concavo-convex pattern is provided on the second surface 101b side of the fiber web 101. The linear convex portion 120 is formed integrally or separately with the outer peripheral surface of the shaped support 106 a.

  Although not shown, the fiber web 101 further transported in the machine direction MD by the transport belt of the dehydrator is transported to the dryer when it is used as a wipe sheet used in a dry state, while it is in a wet state When used as the wipes sheet 10 used in the above, it is conveyed to the liquid supply means for impregnating the liquid containing the medicine and the perfume, with or without the drier. After the fiber webs have been subjected to these steps, they are cut into appropriate sizes by a cutting means. In the dryer, a part of the heat-fusible fibers constituting the fiber web 101 is heat-fused to improve the sheet strength.

  In the nozzle plate 107, a plurality of nozzles arranged in the cross direction CD jets water to the first surface 101a of the fiber web 101 held on the outer peripheral surface of the shaped support 106a of the suction drum 106. The fiber web 101 is preliminarily entangled with fibers in a suction drum (not shown) located upstream of the suction drum 106 so that the fibers are entangled by a weak force so that the entire surface is flat. The fiber web 101 is pressed against the linear convex portion 120 located on the outer peripheral surface of the shaping support 106 a by the water flow jetted from the nozzle plate 107 while being sucked from the pipe 121.

  FIG. 9 (a) is an enlarged view of the fiber web 101 on the linear convex portion 120 before the water flow is jetted in the suction drum 106, and FIG. 9 (b) is after the fluid is jetted in the suction drum Of the fiber web 101 on the linear convex part 120 of FIG.

  Referring to FIGS. 9 (a) and 9 (b), since the fibers are not sucked in the linear convex portion 120, the fibers located on the linear convex portion 120 are rearranged so as to move to the periphery. Then, on the second surface 101 b side of the fiber web 101 corresponding to the linear convex portion 120, a concave portion 122 which is concave toward the first surface 101 a side is formed.

  The linear projections 120 have first, second and third linear projections 120a, 120b, 120b, 120b, 120b, 120b, 120b, 120b, 120b, 120b, 120b, 120b and 120b, respectively, having different designs corresponding to the first, second and fourth pattern portions 41, 42, 44 of the wipes sheet 10. It has 120c. Since the linear convex portion 120 is a portion protruding from the outer peripheral surface of the shaping support 106 a, various designs such as a character and a company logo are adopted for shaping on the fiber web 101 in addition to the illustrated mode. be able to.

  The linear convex portion 120 is disposed on the entire outer periphery of the shaped support 106 a, and all the manufactured wipes sheets 10 have graphic portions having at least one independent and closed design disposed thereon. It has a pattern. In addition, the height of the linear convex portion 120 is designed so that the line width and the height change in the extending direction according to the shaping design.

  In the thin portion (the bottom of the concave portion 122) 124 located on the linear convex portion 120 of the fiber web 101, the fibers move to the periphery by the water flow, and the suction tube 121 does not suck it. The fiber density is lower than that of the area.

  On the other hand, in the first portion 131 located on the outer peripheral edge so as to surround the thin portion 124, the fibers moved from above the linear convex portion 120 are accumulated and the fiber density is relatively high. Further, in the second portion 132 extending further outward from the first portion 131, the fiber density is higher than that of the thin portion 124, and the fiber density is lower than that of the first portion 131.

  In addition, the pulp fibers located in the intermediate fiber layer of the fiber web 101 are shorter in fiber length than the heat-fusion fibers located in the upper and lower layers, and are entangled with each other in the fiber assembly and are moved by water flow It is easy to do. Therefore, in the low density region including the thin portion 124 located on the linear convex portion 120, the pulp fiber moves so as to be blown to the periphery, and the mass of the pulp fiber is compared with the first and second portions 131 and 132. It is lower.

  The water jet process can form a design pattern formed by entanglement of fibers on the fiber web 101, and the concave portion 122, the first portion 131, and the second portion 132 of the fiber web 101 are respectively wipes It corresponds to the concave line 18 (low density area 51), the high density area 52 and the medium density area 53 of the sheet 10.

  Conventionally, in the production process of spunlace fiber non-woven fabric, there is a method of shaping a concave pattern by pressing fibers into a concave portion formed on a shaping support of a suction drum. In such a method, the fibers are sucked in the concave portion, so that the fibers are not present or large pores are formed extending in the extending direction of the concave portion. Therefore, for example, when the concave portion is formed into an independent and closed shape in order to give an independent and closed graphic to the fiber web such as the pattern area 40 according to the present embodiment, the extension of the concave portion is A directionally continuous opening is formed, and the portion surrounded by the concave portion may fall off during the manufacturing process.

  According to this manufacturing method, the fibers are reoriented by the linear convex portion 120 disposed on the outer peripheral surface of the shaped support 106 a of the suction drum 106, and the concave portion 122 is formed on the second surface 101 b side of the fiber web 101. Since the thin portion 124 located in the linear protrusion 120 is not formed with a relatively large opening in the extending direction, the thin portion 124 is surrounded by the linear protrusion 120 during the manufacturing process. The part never falls off. Thus, by shaping the fiber web 101 by the linear convex portion 120 which is convex toward the water flow, various designs which are independent and closed only by the entanglement of fibers, for example, characters, characters, figures, symbols , And combinations thereof can be adopted in various sizes.

  As an example of the manufacturing method of the wipes sheet 10, a spunlace manufacturing method by hydroentanglement has been exemplified, but air, water vapor, etc. can be used besides water as long as the concave line 18 can be formed by fiber entanglement by fluid treatment. It is also possible to employ a fluid-based manufacturing method.

  Although the technical effects of the wipes sheet 10 are mainly described in the present specification, the fiber non-woven fabric sheet according to the present invention is not limited to wipes, and hygiene of sanitary napkins, disposable diapers, breast pads, etc. It can also be used as a component material of an article. In particular, since the first symbol part 41 and the second symbol part 42 of the symbol region 40 have independent and closed outlines 41A, 42A formed by the concave lines 18 due to fiber interlacing, the overall design is flexible. It can be suitably used as a sheet material in contact with the skin of hygiene products.

  In addition to the materials described in the present specification, each of the components constituting the wipes sheet 10 is, unless otherwise specified, various known materials commonly used in the field of this kind. It can be used without limitation. Also, as used herein and in the appended claims, the terms "first", "second", "third" and "fourth" merely distinguish similar elements, positions, etc. It is used for

10 fiber non-woven sheet (wipe sheet)
11 1st surface 12 2nd surface 18 concave line 21 1st fiber layer 22 2nd fiber layer 23 middle fiber layer 41 first design part (pattern)
42 2nd symbol (symbol)
43 3rd symbol part (symbol)
44 4th symbol (symbol)
51 low density area 52 medium density area 53 high density area 81 first portion 82 second portion X first direction Y second direction Z thickness direction

Claims (8)

A fiber formed by interlacing constituent fibers, having a thickness direction, a second direction intersecting the first direction and the first direction, and a first surface and a second surface opposed in the thickness direction In nonwoven sheet,
It has a concave line formed by fiber entanglement, which is concave toward the second surface in the first surface,
The concave line has a second portion extending in the first direction and a first portion extending in the second direction,
The fiber orientation of the second portion is the second direction,
In the first part, the number of fibers per unit area along the second direction is smaller than the number of fibers per unit area along the second direction in the second part Sheet.   The fiber nonwoven fabric sheet according to claim 1, wherein the first portion and the second portion are connected to form a graphic portion.   The concave line according to claim 1 or 2, wherein the concave line has a low density region with a low fiber density at the center in the width direction, and a high density region with a fiber density higher than the low density region on both sides in the width direction. Fiber non-woven sheet. The high density region is along the concave line,
The fiber non-woven fabric sheet according to claim 3, wherein the high density region has a protrusion projecting from the second surface. Intermediate fiber including a first fiber layer forming the first surface, a second fiber layer forming the second surface, and a hydrophilic fiber located between the first fiber layer and the second fiber layer Have layers and
5. The hydrophilic fiber of the intermediate fiber layer is exposed on the surface of the first surface by disentangling fibers in the concave line by applying a tensile force in the first direction. Textile fiber non-woven sheet described in.   The fiber non-woven sheet according to claim 5, wherein the first fiber layer is mainly composed of hydrophobic fibers.   The fiber non-woven sheet according to claim 5 or 6, wherein the surface of the first fiber layer is subjected to a water repelling treatment.   It is for wipes used in a dry state or a wet state, The fiber nonwoven fabric sheet in any one of Claims 1-7.

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