JP2019119952A - Fiber nonwoven fabric sheet - Google Patents

Abstract

To provide a fiber nonwoven fabric sheet good in touch and provided with a pattern part formed by a concave line so as to be easily stretched and easily deformed.SOLUTION: The fiber nonwoven fabric sheet 10 has pattern parts 41, 42 formed by concave lines 18 recessed to a second face 12 side in a first face 11. The concave lines 18 are formed by entanglement of fibers and when pulled in a first direction X by at least 5%, the fibers entangled are disentangled in the concave lines 18 so that a dimension in the first direction X of the concave lines 18 is increased.SELECTED DRAWING: Figure 3

Description

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

  Conventionally, fibrous nonwoven sheets formed by intertwining fibers are 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.

JP, 2005-146451, A (P2005-46451A)

  The fiber non-woven sheet disclosed in Patent Document 1 has a concavo-convex pattern that is shaped by embossing under heating and pressure, so it is excellent in designability, and even after absorbing liquid. The shape of the pattern can be maintained.

  However, heat-sealed fibers are heat-sealed and hardened in the heat-pressed concave part to be partially formed into a film, resulting in the most hardened part in the sheet and the inherent softness and drapability of the fiber non-woven sheet being impaired As the touch becomes worse, the sheet can not easily follow the deformation of the sheet and is easily broken. In particular, when such a fiber non-woven sheet is used as a wipes sheet for wiping off the excrement adhering to the body, the cured concave portion may cause discomfort on the skin of the user such as infants, and some may There is a risk that the user's fingertips such as a mother may be soiled with excrement.

  Moreover, in Southeast Asian countries such as Indonesia, before using the wipes sheet, the user may hold the both sides of the sheet by hand and pull it to widen the sheet area by disentangling fiber entanglement. 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.

  The subject of the present invention relates to the provision of a fiber non-woven sheet provided with a graphic portion formed of a concave line which has a good touch, is easy to stretch and can be easily deformed.

  In order to solve the above-mentioned subject, the present invention has a thickness direction, a first direction and a second direction perpendicular to it, and a first surface and a second surface which face each other in the thickness direction. The present invention relates to a fibrous nonwoven sheet formed by interlacing.

  The fiber non-woven fabric sheet according to the present invention has a graphic portion formed of a concave line which is concave toward the second surface in the first surface, and the concave line is formed by fiber entanglement, and the first When at least 5% is pulled in one direction, the fiber entanglement in the concave line is broken, and the dimension in the first direction of the concave line is increased.

The fiber non-woven sheet according to the present invention includes the following preferred embodiments.
(1) In the wet state, the maximum tensile strength in the first direction is 3.0 to 10.0 N / 25 mm. In such a case, there is no risk of the concave line breaking when the user pulls the sheet in the first direction before use.
(2) In the wet state, the maximum elongation in the first direction is 2.0 to 3.0 times, and the maximum elongation in the second direction is 1.2 to 1.8 times. In such a case, when the user pulls the sheet in the first direction or the second direction before use, the concave line can be extended to widen the width of the concave line.
(3) The concave line has a first portion extending in the second direction and a second portion extending in the first direction, and in the second portion per unit area oriented along the second direction The number of fibers in the first portion is greater than the number of fibers per unit area oriented along the second direction in the first portion. In such a case, the tensile strength of the second portion with respect to the second direction is relatively high, and there is no risk of deformation of the second portion when the second direction is the wiping direction.
(4) By pulling in the first direction, the width dimension of the first portion becomes larger than the width dimension of the second portion. In such a case, when a character having the second direction up and down is adopted as a symbol, it can be changed to a rounded form.
(5) A multilayer structure in which a plurality of fiber layers are laminated, and has an intermediate fiber layer containing hydrophilic fibers. In such a case, the chemical solution can be absorbed and held by the hydrophilic fiber, and evaporation of the chemical solution can be suppressed.
(6) By applying a tensile force in the first direction, the hydrophilic fibers are exposed on the surface of the first surface in the concave line. In such a case, the first surface can be changed from a hydrophobic surface to a hydrophilic surface, and the wiping performance is further excellent.
(7) The fiber layer forming the first surface is mainly composed of hydrophobic fibers. In such a case, evaporation of the drug solution absorbed and held by the hydrophilic fiber located in the intermediate layer can be suppressed.
(8) The surface of the fiber layer forming the first surface is subjected to water repellent treatment. In such a case, evaporation of the drug solution absorbed and held by the hydrophilic fiber located in the intermediate layer can be further suppressed.
(9) The hydrophilic fiber is any one of rayon, pulp and cotton. In such a case, the drug solution can be stably absorbed and held by the hydrophilic fiber.
(10) A wipes sheet used in a dry state or a wet state. In such a case, the design portion can function as a wiping area as well as a decorative area for providing the sheet with a design.

  According to the fiber non-woven fabric sheet of the present invention, when at least 5% is pulled in the first direction, the fiber entanglement in the concave line is broken and the dimension in the first direction of the concave line is increased. While the visibility is improved, the wiping area is increased to improve the wiping performance.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of a wipes sheet | seat 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 dashed-dotted line III (a)-III (a) of FIG. (B) Sectional drawing in alignment with the III (b)-III (b) line of FIG. The figure which shows a user's grasping the both sides of a wipes sheet, and having pulled in the 1st direction. (A) A plan view of the wipes sheet after being pulled in the first direction. (B) Sectional drawing in alignment with dashed-dotted line V (b)-V (b) of Fig.5 (a). (A) The partially expanded view of the area | region enclosed with the dashed-dotted line VI (a) of FIG.3 (b). (B) A partially enlarged view of a region surrounded by an alternate long and short dash line VI (b) in FIG. The figure which shows the mode of the measurement of a tension test. The perspective view of the water jet process in a part of manufacturing process of 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 linear convex part after water flow was injected.

  Referring to FIGS. 1 to 3, a wipes sheet (a wiping sheet, a nonwoven fabric for wipes) 10 shown as an example of the fibrous nonwoven fabric sheet of the present invention is a bulky and flexible sheet formed by interlacing fibers. A first direction X and a second direction Y which intersect with each other, a thickness direction Z, and first and second surfaces 11 and 12 which face each other in the thickness direction Z are provided. In the present specification, the first surface 11 is also referred to as a wiping surface, and the second surface 12 is also referred to as a non-wipe surface.

  The wipes sheet 10 has a substantially rectangular shape, and is opposed to each other in the first direction X with the first and second end edges 10a and 10b opposed to each other in the second direction Y and extending in the first direction X. It has an outer peripheral edge consisting of first and second side edges 10c and 10d extending in two directions Y. The shape of the wipes sheet 10 is not limited to the illustrated example, and may have various known shapes such as, for example, a square, a circle, an oval, a triangle, and a polygon, and various sizes may be selected according to the application. can do.

  The wipes sheet 10 is used in a dry state or a wet state, and can be used, for example, as a back wipe sheet, a cleaning sheet, a disposable towel, or the like. Moreover, the fiber non-woven fabric sheet according to the present invention can be suitably used not only for wipes but also as a sheet material constituting a sanitary product such as a surface sheet disposed on the skin facing surface side of a sanitary napkin or disposable diaper .

  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 and second fiber layers 21 and 22, preferably, a fiber web in which rayon fibers and PET (polyethylene terephthalate) fibers are mixed at a ratio (mass%) of 20:80 to 80:20. It is formed of 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.

  The intermediate fiber layer 23 is formed of hydrophilic fibers such as rayon, pulp and cotton, preferably pulp fibers having a content of 10 to 100% by weight, and the pulp fibers used are generally used hardwoods and softwoods In addition to wood fibers of the above, vegetable fibers other than wood pulp fibers, synthetic fibers (preferably those which have been subjected to a hydrophilization treatment), and the like can be combined. Since the pulp fibers have short fibers and the number of fibers per unit area is large, 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.

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

The thickness dimension D1 of the wipes sheet 10 is 0.3 to 1.0 mm, the mass is 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 average fineness of rayon fibers and PET fibers used for the first and second fiber layers 21 and 22 is 1.5 to 2.5 dtex, and the average fiber length of rayon fibers and PET fibers is 20 to 50 mm, preferably , 35-45 mm. The average fiber length of the pulp fibers 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 pattern 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 interlacing fibers, and has a bottom 18a with a bottom and both side walls 18b and 18b surrounding the bottom 18a.

  “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 has a bottom, for example, when the wipes sheet 10 is used as a wipe sheet, excrement that has entered the concave line 18 after wiping is used for the user's finger. There is no adhesion.

  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 areas 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 higher fiber density than the low density region 51 and a lower fiber density 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, when viewed by the user 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.

  In the case where the wipes sheet 10 is a wet wipes, a high water absorption pulp fiber is positioned at the intermediate fiber layer 23 interposed between the first fiber layer 21 and the second fiber layer 22 to obtain a product Before use, the pulp fiber is not exposed to the outside, the drug solution absorbed by the pulp fiber does not evaporate, and the storage stability of the drug solution is excellent.

  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. Also, in order to measure about 20 to 70 fibers appearing on the cut surface of the sheet, the projecting portion 54 is enlarged 70 to 300 times around the center point of the high density region 52 in the thickness direction Z and observed at the top. 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 fixed 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 area 40 further includes a third symbol portion 43 formed of a part of the first and second symbol portions 41 and 42 and a relatively small fourth symbol portion 44 in a heart shape. The first and second pattern parts 41 and 42 have a relatively large area on the first surface 11 and can alone exhibit perfect design and impress the user. It can be said that it is a design. 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 Since it can not be said that it exhibits sex, it can be said that the 3rd and 4th design parts 43 and 44 are secondary designs.

  The first and second designs 41 and 42 have independent and closed outlines 41A and 42A, and the outlines 41A and 42A are located apart from the outer peripheral edge of the wipes sheet 10. Here, that the outlines 41A and 42A of the first and second designs 41 and 42 are independent means that they extend to the outer peripheral edge of the fabric like the ground pattern of the woven fabric and grasp the entire outer shape It is not a continuous pattern that can not be used, but means one that is located apart from the outer peripheral edge 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 and second designs 41 and 42 are closed, the outlines 41A and 42A extend continuously or discontinuously so as to surround the designs 41B and 42B. It means that. 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.

  It is preferable that the designs 41B and 42B of the first and second designs 41 and 42 have designability that can be recognized by the user at first glance, and in addition to the illustrated example, anime and cartoon characters , Logos for advertising 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).

  In the wipes sheet 10, it can be said that the first and second pattern portions 41 and 42 are main design areas having a three-dimensional shape, and also as a wiping area for wiping out excrement and dust. That is, when using the wipes sheet 10, with the first surface 11 as a wiping surface, dirt attached to the surface to be wiped such as a body or a table is an edge of the side wall 18b of the concave line 18 on the first surface 11 side. (Edge) 18c 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 and second symbols 41 and 42 have required sizes. It is preferable to have an area of at least 10% or more of the surface area of the wipes sheet 10, for example. 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 raised entirely from the sheet surface by fiber entanglement, or to provide 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 baby wipe sheet, the embossed portion may hit the skin and may cause discomfort or irritation, and may be easily broken.

  In the wipes sheet 10 according to the present embodiment, since the concave lines 18 forming the pattern area 40 are formed by interlacing fibers, as a whole nonwoven fabric as compared with the case where they are formed by heat embossing treatment It is soft and has a good touch, and can maintain the characteristic drape of spunlace nonwoven fabric. In addition, since the first and second designs 41 and 42 have independent outlines 41A and 42A, a design having a completely independent aspect can be adopted, and it is a simple continuous pattern extending to the outer edge of the sheet. In comparison, 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 and second designs 41 and 42, the outlines 41A and 42A are closed, and the designs 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.

  Moreover, the 3rd and 4th symbol parts 43 and 44 are located around the 1st and 2nd symbol parts 41 and 42 which are main wiping areas. Therefore, when the wipes sheet 10 is squeezed, the third and fourth pattern parts 43, 44 are deformed as a starting point, and the deformation of the first and second pattern parts 41, 42 located at the center is suppressed. It can be said that

  The first and second designs 41 and 42 preferably have a curved concave line 18 from the viewpoint of wiping performance and aesthetics. Also in the present embodiment, the outlines 41A and 42A are curved, and the patterns 41B and 42B also have curved portions. As described above, the first and second pattern portions 41 and 42 having the curved concave line 18 can give a soft and good impression of contact with the skin and can be deformed according to the shape of the surface to be wiped. For example, the first and second designs 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. 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 and second pattern parts 41 and 42 of the pattern area 40 can function as a wiping area, but the third and fourth pattern parts 43 and 44 are also formed from the concave line 18 Therefore, 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 and second designs 41 and 42, the recessed lines 18 forming the outlines 41A and 42A are wider than the recessed lines 18 forming the designs 41B and 42B as a whole. 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. 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 .

  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 first virtual lines P and second directions It has an asymmetrical shape with respect to a second imaginary line Q which bisects the dimension of 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 first portion 81 extending in the second direction Y and a second portion 82 extending in the first direction X. The fiber orientation in the second portion 82 is in the second direction Y, and the number of fibers per unit area oriented along the second direction Y in the second portion 82 is along the second direction Y in the first portion 81. It is more than the number of fibers per unit area oriented. As described above, in the second portion 82, since the fiber orientation is in the second direction Y, when the second direction Y is set to the wiping direction, the required tensile strength is exhibited, and the concave shape is not broken. .

  Here, the fiber orientation is a direction in which the fibers flow in a plan view of the wipes sheet 10, and "the fiber orientation of the second portion 82 is the second direction Y" is the second portion 82. In the total weight of the fibers constituting the fiber, in addition to those in which 100% is oriented in the second direction Y, at least 50% in the range of −45 ° to + 45 ° with respect to the second direction Y Including those with 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 portion 81 is a portion extending along the first imaginary line P if it is linear, and the second portion 82 is along the second imaginary line Q if it is linear. Is an extending part. On the other hand, for example, in the case where the outlines 41A and 42A of the first and second symbol portions 41 and 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, when adopting a character design or the like in which the second direction Y is up and down as the designs 41B and 42B of the first and second designs 41 and 42, the outlines of the upper and lower portions (for example, the head and body) The dimensional balance between the upper and lower sides does not collapse, and the design shape can be maintained even after wiping or, for example, when taking out from the packaging package so that frictional resistance occurs in the second direction Y.

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 Thus, for example, a word that the infant has not remembered or has just remembered can be adopted for the patterns 41B and 42B, and the word can be fixed in the memory of the infant by repeating 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 achieving differentiation from other products, even if the user is a relatively young woman, the Wipess sheet 10 can be carried and used while going out, rather than without hesitation be able to. 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.

  Although not shown, when the wipes sheet 10 is used, the second side 12 which is a non-wipe surface may be folded in two with the second side 12 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. In addition, by having a design area 40 of a different design for each wipes sheet 10, when the user takes out a plurality of wipes sheets 10 from the storage container (dispenser) housed in a stacked state, they differ one after another. The user is able to pop up while having fun since the one having the design is to be drawn out.

  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 sheets but also when using wet tissues or kitchen sheets, the sheets are pulled so as to stretch them out to check the sheet strength and expand the sheet area May be used.

  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 FIGS. 3 (b) and 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. As a result, the entanglement of fibers is released, and 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 designs 41 to 44 increase. Specifically, the width dimension W4 of the first portion 81 when the wipes sheet 10 is stretched by 5% in the first direction X in the wet state is the width dimension W3 of the first portion 81 before being pulled. The width dimension W4 of the first portion 81 in the state of 1.2 to 2.0 times and elongated by 30% in the first direction X is 1.5 to 1.5 times the width dimension W3 of the first portion 81 before being pulled. It is 2.5 times.

  As described above, by pulling in the first direction X, the width dimensions W3 and W4 of the concave line 18 are expanded and the outer dimensions thereof are 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 shaped by fiber entanglement and has extensibility, when it is pulled in the first direction X, the fibers are entangled in the bottom 18a. However, the width dimensions W3 and W4 are gradually expanded, and it is possible to suppress breakage of part of the bottom portion 18a.

  The bottom 18a of the concave line 18 is thin compared to the other part of the wipes sheet 10, and the low density region 51 causes the fibers to be entangled even with a relatively small tensile force. Can be said to be easily Further, since the high density region 52 is positioned on both side walls 18 b of the concave line 18 and is difficult to be expanded compared to the low density region 51, it is possible that the entire concave line 18 loses its shape even if the bottom 18 a is expanded. Absent.

  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 dimensions W3 and W4 of the concave line 18 are expanded, so that the outlines of the first to fourth designs 41-44 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 large width, by pulling the wipes sheet 10 in the first direction X, the outer shape becomes clear and easily visible, or the design that has given a narrow and distorted impression is expanded. , Can be changed to a balanced shape.

  Since the fibers of the first direction X and the second direction Y are oriented in the first portion 81 while the second portion 82 is fiber-oriented in 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 outline of each symbol 41-44 becomes clearer, and the first portion 81 retains 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 lateral 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 first surface 11 formed of the hydrophobic layer. It has not been. In the wet state in which the wipes sheet 10 is impregnated with an impregnating solution such as a chemical solution having an antibacterial action and the like, the pulp fibers 28 constitute an absorption layer that absorbs and holds the impregnating solution. By being surrounded by the layer and not exposed to the outside, the layer is not exposed to the outside air, and drying can be prevented to suppress evaporation of the chemical solution.

  Referring to FIG. 6 (b), in the state after the wipes sheet 10 is pulled in the first direction X by at least 30%, the entanglement of the fibers constituting the bottom 18 a of the concave line 18 is unwound and the intermediate fiber layer 23 A portion of the pulp fibers 28 located in the first fiber layer 21 passes through the inter-fiber gap of the fibers constituting the first fiber layer 21 and is exposed to the outside from the first surface 11. Thus, in use, the user stretches the wipes sheet 10 in the first direction X to widen the concave lines 18 and expose a part of the pulp fibers 28 to the bottom. When the 18a comes in contact with the surface to be wiped, the impregnating solution previously held in the fiber gap of the first fiber layer 21 and the impregnating solution absorbed by the pulp fibers 28 are used to effectively and hygienically stain It can be wiped off.

  Thus, in use, in the concave line 18, the surface of the first surface 11 which is a hydrophobic surface is exposed to pulp fibers and other hydrophilic fibers on the surface of the first surface 11, and the first surface 11 is By changing from a hydrophobic surface to a hydrophilic surface, the wipeability at 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.

  Also, when taking out the wipes sheet 10 from the storage container, the user pulls the wipes sheet 10 in sliding contact with the opening edge of the dispensing opening of the storage container in order to suppress the slip, as shown in FIG. Even when the user does not pull in the first direction X, when the wipes sheet 10 is pulled in the first direction X when taken out from the storage container, the entanglement of the fibers of the concave line 18 is unwound and the width dimension is Can be increased, or the pulp fibers 28 of the intermediate fiber layer 23 can be exposed.

  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 300%), 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 side walls 18b and 18b) of the first portion 81 are marked with a red pen along the marks T1, T1. T2 was added, and the separation distance R1 between the marks T1 and T2 was measured with a ruler before measurement.

  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.

<Method of checking pulp fiber exposed to the first side>
As a method of confirming that a part of the pulp fiber 28 is exposed on the surface of the first surface 11 when the wipes sheet 10 is pulled in the first direction X, for example, a test using the above-mentioned tensile tester The piece 93 is pulled in the first direction X, and when it is pulled by 30% (elongation), it is removed from the chucks 91 and 92 and confirmed by observing the concave line 18 forming the first portion 81 with an electron microscope Can.

  In order to change the first surface 11 composed of the first fiber layer 21 mainly composed of hydrophobic fibers from the hydrophobic surface to the hydrophilic surface, at least the first surface 11 of the pulp fibers (hydrophilic fibers) 28 This means that the total fiber amount (area) of the exposed portion is 20% or more of the total fiber amount (area) including the pulp fibers 28 and the hydrophobic fibers constituting the first surface 11.

<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 serves as a base of the intermediate fiber layer 23 between fiber aggregates formed by the card method which is a base of the first and second fiber layers 21 and 22 of the wipes sheet 10. It has a multi-layered structure in which fiber aggregates formed by the air laid method are 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 a line after the water flow is jetted in the suction drum. FIG. 7 is an enlarged view of the fiber web 101 on the convex portion 120.

  Referring to FIG. 8 and FIGS. 9A and 9B, since the fibers are not sucked in the linear convex portion 120, the fibers located on the linear convex portion 120 move to the periphery. On the second surface 101b side of the fiber web 101 corresponding to the linear convex portion 120, a concave portion 122 which is concave toward the first surface 101a 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, it is excellent in flexible design as a whole, and can be suitably used as a sheet material in contact with the skin of the sanitary product.

  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, the terms "first", "second" and "third" used in the present specification and claims are merely used to distinguish similar elements, positions, and the like.

10 fiber non-woven sheet (wipe sheet)
11 first surface 12 second surface 18 concave line 40 symbol area 41 first symbol part (symbol part)
42 2nd symbol part (symbol part)
41A, 42A Outline 41B, 42B Pattern 61 Wide portion 62 Narrow portion 70 Slit 81 First portion 82 Second portion P First phantom line Q Second phantom line X First direction Y Second direction Z Thickness direction

Claims (11)

In a fibrous nonwoven fabric sheet formed by interlacing constituent fibers, having a thickness direction, a first direction and a second direction orthogonal thereto, and opposing first and second surfaces in the thickness direction,
It has a symbol formed from a concave line which is concave toward the second surface in the first surface,
The concave line is formed by fiber entanglement,
A fiber non-woven fabric sheet characterized in that when it is pulled at least 5% in the first direction, the fiber entanglement in the concave line is broken to increase the dimension of the concave line in the first direction.   The fibrous nonwoven fabric sheet according to claim 1, wherein the maximum tensile strength in the first direction is 3.0 to 10.0 N / 25 mm in a wet state.   The fiber according to claim 1 or 2, wherein in the wet state, the maximum elongation in the first direction is 2.0 to 3.0 times, and the maximum elongation in the second direction is 1.2 to 1.8 times. Nonwoven sheet.   The concave line has a first portion extending in the second direction and a second portion extending in the first direction, and the number of fibers per unit area oriented in the second direction in the second portion The fiber non-woven sheet according to any one of claims 1 to 3, wherein the number of fibers per unit area in the first portion is greater than the number of fibers per unit area oriented in the second direction.   The fiber nonwoven fabric sheet according to any one of claims 1 to 4, wherein the width dimension of the first portion becomes larger than the width dimension of the second portion by pulling in the first direction.   The fiber non-woven fabric sheet according to any one of claims 1 to 5, which has a multilayer structure in which a plurality of fiber layers are laminated and has an intermediate fiber layer containing hydrophilic fibers.   The fibrous nonwoven fabric sheet according to claim 6, wherein the hydrophilic fibers are exposed on the surface of the first surface in the concave line by applying a tensile force in the first direction.   The fiber non-woven sheet according to claim 6 or 7, wherein the fiber layer forming the first surface is mainly composed of hydrophobic fibers.   The fiber non-woven fabric sheet according to any one of claims 6 to 8, wherein the surface of the fiber layer forming the first surface is subjected to water repelling treatment.   The fiber non-woven fabric sheet according to any one of claims 7 to 9, wherein the hydrophilic fiber is any one of rayon, pulp and cotton.   It is a wipes sheet used in a dry state or a wet state, The fiber nonwoven fabric sheet in any one of Claims 1-10.

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