WO2019131551A1 - Feuille de tissu non-tissé en fibres - Google Patents

Feuille de tissu non-tissé en fibres Download PDF

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Publication number
WO2019131551A1
WO2019131551A1 PCT/JP2018/047359 JP2018047359W WO2019131551A1 WO 2019131551 A1 WO2019131551 A1 WO 2019131551A1 JP 2018047359 W JP2018047359 W JP 2018047359W WO 2019131551 A1 WO2019131551 A1 WO 2019131551A1
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WO
WIPO (PCT)
Prior art keywords
fiber
fibers
sheet
wipes
concave
Prior art date
Application number
PCT/JP2018/047359
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English (en)
Japanese (ja)
Inventor
明寛 木村
耕 出谷
眞一郎 泉保
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017254747A external-priority patent/JP6956629B2/ja
Priority claimed from JP2017254750A external-priority patent/JP7065607B2/ja
Priority claimed from JP2017254746A external-priority patent/JP7065604B2/ja
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to KR1020207007271A priority Critical patent/KR102481089B1/ko
Priority to CN201880073091.8A priority patent/CN111328355B/zh
Publication of WO2019131551A1 publication Critical patent/WO2019131551A1/fr

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement

Definitions

  • the present invention relates to a fibrous nonwoven sheet formed by interlacing fibers.
  • 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.
  • 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.
  • 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.
  • 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.
  • the user may hold the both sides of the sheet by hand and pull it to widen the sheet area by disentangling fiber entanglement.
  • the sheet having the concavo-convex pattern formed by embossing is pulled, a part of the concave portion may be broken.
  • the fiber non-woven fabric sheet disclosed in Patent Document 1 since it has a concavo-convex pattern shaped by embossing under heat and pressure, it is excellent in designability and also after absorbing liquid. The shape of the uneven pattern can be maintained.
  • the fiber non-woven fabric sheet is formed of a fiber web made of a mixture of hydrophobic fibers including heat-fusible synthetic fibers and hydrophilic fibers such as pulp and rayon, and is a wet wipe impregnated with a drug or the like. It is
  • 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.
  • 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.
  • the fiber non-woven fabric sheet since the fiber non-woven fabric sheet is wet wipes, it absorbs and holds a drug or the like having an antibacterial effect or the like in which hydrophilic fibers mixed with hydrophobic fibers are impregnated in the sheet, but hydrophilicity is obtained on the sheet surface When the fiber is located, it is exposed to the outside air and dried, and there is a possibility that the impregnating solution may evaporate. Also, hydrophilic fibers such as pulp fibers have a poorer feel than hydrophobic fibers such as synthetic fibers.
  • both sides of the sheet become hydrophobic. Therefore, when wiping off dirt such as excrement with a relatively light wiping force, it is difficult for the drug or the like absorbed and held by the hydrophilic fiber to exude to the sheet surface, and the impregnation is held in the fiber gap forming both sides of the sheet. As it will wipe off with liquid only, it can not wipe off effectively and hygienically.
  • the fiber non-woven fabric sheet disclosed in Patent Document 2 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.
  • 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.
  • the cured concave portion may cause discomfort on the skin of the user such as infants, and some may There was a risk that the user's fingertips such as mothers could be soiled with excrement.
  • 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.
  • the third invention is to provide a fiber non-woven fabric sheet which has a good touch and can improve the design and suppress the reduction in the clarity of the concave line even after wiping. Do.
  • a first invention has a thickness direction, a first direction and a second direction orthogonal thereto, and a first surface and a second surface opposed in the thickness direction, and is formed by interlacing constituent fibers.
  • the fiber non-woven fabric sheet according to the first aspect of the invention has a figure 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, When at least 5% is pulled 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 fiber non-woven sheet according to the first invention includes the following preferred embodiments.
  • 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.
  • 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.
  • 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.
  • the chemical solution can be absorbed and held by the hydrophilic fiber, and evaporation of the chemical solution can be suppressed.
  • the hydrophilic fibers are exposed on the surface of the first surface in the concave line.
  • the first surface can be changed from a hydrophobic surface to a hydrophilic surface, and the wiping performance is further excellent.
  • the fiber layer forming the first surface is mainly composed of hydrophobic fibers.
  • evaporation of the drug solution absorbed and held by the hydrophilic fiber located in the intermediate layer can be suppressed.
  • 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.
  • 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.
  • a second invention has a thickness direction, a first direction and a second direction orthogonal thereto, and a first surface and a second surface opposed in the thickness direction, and is formed by interlacing fibers.
  • a modified non-woven fabric sheet is formed by interlacing fibers.
  • the fiber non-woven fabric sheet according to the second aspect of the present invention comprises a concave line formed by fiber entanglement, which is concave toward the second surface in the first surface, a first fiber layer forming the first surface, and When having a second fiber layer forming a second surface and an intermediate fiber layer including hydrophilic fibers located between the first and second fiber layers, and being pulled at least 30% in the first direction, It is characterized in that fiber entanglement is broken in the concave line, and a part of the hydrophilic fibers of the intermediate fiber layer is exposed on the surface of the first surface.
  • the fiber non-woven sheet according to the second invention includes the following preferred embodiments.
  • (3) The first fiber layer is mainly composed of hydrophobic fibers.
  • evaporation of the drug solution absorbed and held by the hydrophilic fiber located in the intermediate layer can be suppressed.
  • the surface of the first fiber layer is subjected to water repellent treatment.
  • the design portion functions as a decorative area, and the design of the sheet is improved.
  • 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.
  • the tensile strength of the second portion in the second direction is relatively high, and in the case where the second direction is the wiping direction, there is no risk of deformation of the second portion.
  • the hydrophilic fiber is any one of rayon, pulp and cotton. In such a case, the drug solution can be absorbed and held by the hydrophilic fiber.
  • a third invention has a thickness direction, a first direction and a second direction intersecting the first direction, and a first surface and a second surface opposite to the thickness direction to intertwine constituent fibers.
  • the present invention relates to the improvement of a fiber non-woven sheet formed by
  • the fiber non-woven fabric sheet according to the third invention has a concave line formed by fiber entanglement which is concave toward the second surface in the first surface, and has a low fiber density and a low density area, and the low density And a high density area having a fiber density greater than the area, and the concave line has the low density area located at the center in the width direction and the high density area located on both sides of the low density area.
  • the amount of hydrophilic fibers in the high density region may be greater than the amount of hydrophilic fibers in the low density region.
  • the fiber non-woven sheet according to the third invention includes the following preferred embodiments.
  • (1) The fiber nonwoven fabric sheet is positioned between the first fiber layer forming the first surface, the second fiber layer forming the second surface, and the first fiber layer and the second fiber layer. And an intermediate fiber layer containing hydrophilic fibers, and by applying a tensile force in the first direction, the fiber entanglement is broken in the concave line to form the intermediate fiber layer on the surface of the first surface.
  • the hydrophilic fibers are 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 hydrophilic fibers of the intermediate fiber layer are exposed on the surface of the first surface, so the drug solution held by the intermediate fiber layer is also exposed on the surface of the first surface Will be easier to wipe off.
  • the high density region of the fiber non-woven fabric sheet has a protrusion projecting from the second surface. Therefore, the surface of the first surface has a concave line, while the surface of the second surface has a protrusion. Therefore, when wiping off easily removable foreign matter, the first surface can be used to wipe away the foreign matter while being accommodated in the concave line, while when wiping away the adhering foreign matter, the second surface is used to scrape away the foreign matter It can be wiped off.
  • 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 (4) 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. (5) The fiber non-woven sheet is for wipes used in a dry state or a wet state. By this, the sheet
  • the fiber interlacing in the concave line is unwound when the fiber is unwound at least 5% in the first direction, and the dimension in the first direction of the concave line becomes large. While the visibility of a part improves, the wiping area increases and the wiping property improves.
  • the fiber non-woven fabric sheet of the second invention by pulling in the first direction, the fiber entanglement is broken in the concave line to expose part of the hydrophilic fibers of the intermediate fiber layer on the surface of the first surface. Therefore, the sheet surface can be changed from a hydrophobic surface to a hydrophilic surface, so that the evaporation of a chemical solution or the like absorbed and held by the hydrophilic fiber is suppressed, and when used as a wet wipe, the stain is effective. Can be wiped cleanly and hygienically.
  • the fiber nonwoven fabric according to the third aspect of the invention has a concave line formed by fiber entanglement, which is concave toward the second surface in the first surface, so design can be improved while the touch is good.
  • the concave line since the concave line has the low density area located at the center in the width direction and the high density area located on both sides of the low density area, foreign matter is accumulated outside the high density area when wiping off. Foreign matter can be suppressed from entering, which can suppress deterioration in the clarity of the concave line even after wiping.
  • the amount of hydrophilic fibers in the high density region is greater than the amount of hydrophilic fibers in the low density region. For this reason, when used in the dry state, the water contained in the foreign matter can be absorbed in the high density region, while when used in the wet state, the foreign matter can be wiped off by the water contained in the high density region. it can.
  • FIGS. 10 to 18 show a second invention
  • FIGS. 19 to 28 show a specific embodiment of the third invention.
  • 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 1st invention. Top view of wipes sheet.
  • FIG. 1 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
  • FIG. 14 A plan view of the wipes sheet after being pulled in the first direction.
  • FIG. 14 Sectional drawing in alignment with dashed-dotted line XIV (b) -XIV (b) of FIG. 14 (a).
  • A The elements on larger scale of the area
  • B The elements on larger scale of the area
  • a wipes sheet (a wiping sheet, a nonwoven fabric for wipes) 110 shown as an example of the fiber non-woven fabric sheet of the first invention is a bulky and flexible sheet formed by interlacing fibers. It has a first direction X and a second direction Y which intersect with each other, a thickness direction Z, and first and second surfaces 111 and 112 which face each other in the thickness direction Z.
  • the first surface 111 is also referred to as a wiping surface
  • the second surface 112 is also referred to as a non-wipe surface.
  • the wipes sheet 110 is substantially rectangular and opposed to each other in the second direction Y and extends in the first direction X, and the first and second edges 110 a and 110 b opposed to each other in the first direction X It has an outer peripheral edge composed of first and second side edges 110c and 110d extending in two directions Y.
  • the shape of the wipes sheet 110 is not limited to the illustrated example, and may have various known shapes such as square, circle, oval, triangle, polygon, etc., and various sizes may be selected according to the application. can do.
  • the wipes sheet 110 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.
  • 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 .
  • 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.
  • the wipes sheet 110 includes a first fiber layer 121 forming the first surface 111 side, a second fiber layer 122 forming the second surface 112 side, the first fiber layer 121, and the second fiber layer 121. And an intermediate fiber layer (third fiber layer) 123 located between the fiber layer 122 and the fiber layer 122.
  • the first fiber layer 121, the second fiber layer 122, and the intermediate fiber layer 123 have a multi-layered structure in which the fibers constituting them are three-dimensionally entangled with each other to form a composite.
  • a mixed fiber web of hydrophilic fibers and synthetic fibers can be used.
  • 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.
  • 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.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PE polyethylene
  • core-sheath type composite fibers using these fibers are used. be able to.
  • 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.
  • 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 123 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 are short and the number of fibers per unit area is large, the whiteness of the intermediate fiber layer 123 becomes relatively high, and the visibility of the pattern area 140 can be enhanced. In addition to pulp fibers, manila hemp, mochi, three mochi, and linter pulp may be mixed.
  • the first and second fiber layers 121 and 122 are mainly composed of hydrophobic fibers, and the hydrophobic layer is considered to be a hydrophilic layer, and the intermediate fiber layer 123 is mainly composed of hydrophilic fibers and thus it can be said to be a hydrophilic layer. .
  • the wipes sheet 110 has a thickness dimension D101 of 0.3 to 1.0 mm, a mass of 40 to 60 g / m 2 , and an apparent density of 0.03 to 0.09 g / cm 3 .
  • a thickness measurement device manufactured by PEACOCK, measurement surface ⁇ 44 mm, measurement pressure 3 g / cm 3 .
  • the average fineness of rayon fibers and PET fibers used for the first and second fiber layers 121 and 122 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 121 and 122 forming the first and second surfaces of the wipes sheet 110 and the average fiber length are made larger than the constituent fibers of the intermediate fiber layer 123 (Fiber unevenness) becomes good, and the difference in the amount of fibers of the concave line 118 constituting the pattern area 140 can be suppressed, and the required visibility and shape stability can be secured.
  • the wipes sheet 110 has a graphic area 140 formed of a concave line 118 which is concave toward the second surface 112 on the first surface 111.
  • the concave line 118 is formed by entanglement of fibers, and has a bottom 118a with a bottom and side walls 118b and 118b surrounding the bottom 118a.
  • Concave line is bottomed means that a continuous opening is not formed in the extending direction of the concave line 118, 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.
  • the concave line 118 has a bottom, for example, when the wipes sheet 110 is used as a wipe sheet, excrement that has entered the concave line 118 after being wiped off is used by the user's finger. There is no adhesion.
  • the wipes sheet 110 has a higher fiber density than the low density area 151 located at the bottom 118 a of the concave line 118 and the low density areas 151 located at least on both sides of the low density area 151.
  • a high density region 152 and a medium density region 153 having a higher fiber density than the low density region 151 and a lower fiber density than the high density region 152 are provided. That is, the fiber density is the lowest at the bottom 118a of the concave line 118, and the high density area 152 having the highest fiber density is located at least on both sides so as to surround the outer periphery of the bottom 118a.
  • the wipes sheet 110 has such a fiber density difference, and the high density area 152 is positioned so as to surround the bottom portion 118a of the concave line 118 consisting of the low density area 151, and a contrast due to the density difference is formed.
  • the dense region 152 is visually recognized in a dark color so as to border the outer peripheral edge of (the bottom 118a of) the concave line 118 due to the density of fibers, and the contour of the concave line 118 can be clearly seen.
  • the high density region 152 has a projecting portion 154 which protrudes outward more than the middle density region 153 on the second surface 112 side.
  • the high density region 152 has a three-dimensional shape that protrudes outward on the second surface 112 side, when viewed by the user from the second surface 112 side where the concave line 118 is not formed. Even, the contour of the concave line 118 can be grasped. Therefore, in combination with the contrast due to color density due to the density difference between the high density region 152 and the low density region 151, the contour of the concave line 118 can be seen more clearly not only from the first surface 111 but also from the second surface 112. It can be done.
  • a high water absorption pulp fiber is positioned in the intermediate fiber layer 123 interposed between the first fiber layer 121 and the second fiber layer 122, thereby making the 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 portion 118a of the concave line 118 of the wipes sheet 110 that is, the content (% by weight) of pulp fibers located in the low density region 151 is the content (% by weight) of pulp fibers in the high density region 152 and the medium density region 153 It is smaller than).
  • the low density region 151 has a relatively low pulp fiber content, it can be said that the liquid retention is relatively low, but the bottom portion 118a of the concave line 118 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 152 and 153 without requiring high liquid retention, and it is more difficult to break.
  • a portion of the wipes sheet 110 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 110 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 line 118 of the symbol area 140.
  • the projecting portion 154 is observed at the top, enlarged 70 to 300 times around the middle point in the thickness direction Z of the high density region 152
  • the number of cross-sections of pulp fibers per fixed area about 0.5 mm 2 was counted.
  • 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 110 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 140 has a first symbol portion 141 and a second symbol portion 142 which have different designs.
  • the first design portion 141 has a substantially circular outline 141A formed from the concave line 118, and a substantially star-shaped design 141B surrounded by the outline 141A.
  • the second symbol portion 142 has a substantially elliptical outline 142A, and a pattern 142B surrounded by the outline 142A, in which a plurality of characters are arranged in a plurality of lines arranged in the second direction Y.
  • the first symbol portion 141 and the second symbol portion 142 are located side by side substantially at the center of the first direction X.
  • the symbol area 140 further includes a third symbol portion 143 formed of a part of the first and second symbol portions 141 and 142 and a relatively small fourth symbol portion 144 in a heart shape.
  • the first and second design parts 141 and 142 have a relatively large area on the first surface 111, and can exhibit a complete design by itself to impress the user. It can be said that it is a design.
  • the third pattern portion 143 is incomplete and does not exhibit any design property by itself, and the fourth pattern portion 144 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 symbol parts 143 and 144 are secondary designs.
  • the first and second designs 141 and 142 have independent and closed outlines 141A and 142A, and the outlines 141A and 142A are located apart from the outer peripheral edge of the wipes sheet 110.
  • the outlines 141A and 142A of the first and second designs 141 and 142 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 110 and has completely independent design. Therefore, for example, as in the case of the third design portion 143, those whose outline 143A does not reach the outer edge of the sheet and can not grasp the overall design do not correspond to independent outlines.
  • the outlines 141A and 142A of the first and second designs 141 and 142 are closed, the outlines 141A and 142A extend continuously or discontinuously so as to surround the designs 141B and 142B. It means that.
  • the outlines 141A and 142A may have various known shapes such as a circle, an ellipse, a triangle, and a polygon, as long as the outlines 141A and 142A surround the symbols 141B and 142B.
  • the designs 141B and 142B of the first and second designs 141 and 142 are preferably designed to 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).
  • the first and second pattern parts 141 and 142 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 110, with the first surface 111 as a wiping surface, dirt attached to the surface to be wiped such as a body or a table is an edge on the first surface 111 side of both side walls 118b of the concave line 118 (Edge) 118c can be used to effectively wipe away dirt.
  • the first and second symbols 141 and 142 have required sizes. It is preferable to have an area of at least 10% or more of the surface area of the wipes sheet 110, for example. On the other hand, since the fourth symbol portion 144 has a relatively small area, it does not function as a main wiping area.
  • 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.
  • the designability is further improved as compared to the printed pattern, and the raised outer peripheral edge can wipe off the dirt.
  • the design itself 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.
  • 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.
  • it 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.
  • 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.
  • the embossed portion may hit the skin and may cause discomfort or irritation, and may be easily broken.
  • the concave lines 118 forming the pattern area 140 are formed by the entanglement of 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.
  • the first and second design parts 141 and 142 have independent outlines 141A and 142A, 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.
  • the pattern area 140 itself is raised, light may be scattered and its outer contour may be blurred, but since it is formed by the concave line 118, the outer contour is made clearer to the user Can be made to understand. Further, since the portion other than the concave line 118 is in direct sliding contact with the surface to be wiped off at the time of wiping, the shape of the concave line 118 is not broken by friction and the pattern area 140 is not largely deformed.
  • the outlines 141A and 142A are closed, and the designs 141B and 142B are arranged so as to be surrounded by the outlines 141A and 142A. Even when the user pulls or loosens the wipes sheet 110 by deforming the wipes sheet 110 because the designs 141B and 142B are surrounded by the outlines 141A and 142A, the outlines 141A and 142A are the starting point. As the symbol 141B is deformed, the design 141B, 142B can maintain its shape.
  • the 3rd and 4th symbol parts 143 and 144 are located in the circumference
  • the first and second designs 141 and 142 preferably have curved concave lines 118 from the viewpoint of wiping performance and aesthetics. Also in the present embodiment, the outlines 141A and 142A are curved, and the patterns 141B and 142B also have curved portions. As described above, the first and second pattern parts 141 and 142 have a curved concave line 118, which can give a soft and good impression of contact with the skin, and deform according to the shape of the surface to be wiped. For example, the first and second designs 141 and 142 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 111 is a wiping surface by positioning the symbol area 140 including the concave line 118 on the first surface 111 side. Therefore, it can be said that the symbol area 140 also has a function of guiding the user to use the first surface 111 as a wiping surface.
  • the first and second pattern parts 141 and 142 of the pattern area 140 can function as a wiping area, but the third and fourth pattern parts 143 and 144 are also formed from the concave line 118 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 141 to 144 according to the size of the stain at the time of wiping.
  • the recessed lines 118 forming the outlines 141A and 142A are generally wider than the recessed lines 118 forming the designs 141B and 142B. Since the outlines 141A and 142A are relatively wide, it is possible to attract the user's attention and further enhance the designs 141B and 142B surrounded by the user. In addition, after wiping dirt roughly by outlines 141A and 142A at the time of wiping off, persistent dirt can be scraped off by relatively narrow and densely gathered designs 141B and 142B located in the inside .
  • the pattern area 140 has a plurality of first to fourth pattern portions 141-144 having different designs, thereby dividing the dimensions of the wipes sheet 110 in the first direction X into two equal parts: a first imaginary line P and a second direction 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 110. Thus, as long as the vertical and horizontal directions of the wipes sheet 110 can be recognized, the symbol area 140 may be asymmetric with respect to either the first virtual line P or the second virtual line Q.
  • the second direction Y corresponds to the machine direction in the manufacturing process
  • the first direction X corresponds to the direction intersecting the machine direction
  • the constituent fibers are mainly oriented in the second direction Y.
  • 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
  • the pattern area 140 asymmetrically, the second direction Y is the wiping direction It can be recognized as (vertical direction).
  • the symbol 142B of the second symbol 142 by arranging the design element so that the second direction Y is in the vertical direction, the user can be induced to wipe in the second direction Y.
  • the second symbol 142 is asymmetric with respect to an imaginary line (not shown) that divides the dimension in the first direction X into two equal parts.
  • the concave line 118 forming the symbol area 140 has a first portion 181 extending in the second direction Y and a second portion 182 extending in the first direction X.
  • the fiber orientation in the second portion 182 is in the second direction Y, and the number of fibers per unit area oriented along the second direction Y in the second portion 182 is along the second direction Y in the first portion 181. It is more than the number of fibers per unit area oriented.
  • 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. .
  • the fiber orientation is the direction in which the fibers are flowing in a plan view of the wipes sheet 110, and "the fiber orientation of the second portion 182 is the second direction Y" is the second portion 182.
  • 50% or more of the fiber orientation 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.
  • fiber orientation from the tensile strength ratio (first direction X / second direction Y) in the first direction X and the second direction Y of the second portion 182 using a tensile tester described later May be measured.
  • the first portion 181 extends along the first imaginary line P if it is linear, the second portion 182 along the second imaginary line Q if it is linear Is an extending part.
  • the first part 181 is a part that is convex in the first direction X
  • the second portion 182 is a portion convexly bent in the second direction Y.
  • the outlines of the upper and lower parts (for example, 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.
  • the shape is unlikely to collapse and the width dimension tends to be narrow.
  • the first direction X is the wiping direction
  • the width dimension of the first portion 181 Spreads.
  • 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.
  • the designs 141B and 142B of the first and second design parts 141 and 142 an ideal combination of figure design and characters may be adopted.
  • the figure design and the letters correspond to each other by arranging letters such as “I love YOU!” In the placard.
  • 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.
  • a word that the infant has not remembered or has just remembered can be adopted for the patterns 141B and 142B, and the word can be fixed in the memory of the infant by repeating with the parent and child at the time of use.
  • the symbol area 140 can also be provided with a function as one of the tools capable of creating good communication between the parent and child through the wipes sheet 110.
  • the wipes sheet 110 has a design with high visibility and 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, the Wipess sheet 110 can be carried and used when going out, rather than without hesitation. be able to.
  • the Wipess sheet 110 can be carried and used when going out, rather than without hesitation. be able to.
  • the wipes sheet 110 has both the basic functions as wipes and the emotional value that causes the consumer to buy.
  • the second side 112 which is a non-wipe surface may be folded in two and used.
  • the second surfaces 112 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 .
  • the protruding portions 154 of the high density area 152 located on the second surface 112 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.
  • a plurality of symbol parts 141 and 142 having independent and closed outlines 141A and 142A are present in one wipe sheet 110, but at least in consideration of design and wiping properties, at least It is sufficient that one symbol 141 and 142 exist.
  • the pattern area 140 of a different design for every wipes sheet 110 when a user takes out from the accommodation container (dispenser) accommodated in the state in which the some wipes sheets 110 were laminated
  • the wipes sheet 110 is obtained by grasping and pulling the both sides with the hands 108 and 109 on both sides in the first direction X, respectively, thereby disentangling the fibers.
  • the width of 110 may be extended and used.
  • the sheets are pulled so as to stretch them out to check the sheet strength and expand the sheet area May be used.
  • the wipes sheet 110 when the wipes sheet 110 is pulled in the first direction X, the entanglement of fibers is released not only in the symbol area 140 but also in other areas, and the wipes sheet 110 as a whole is
  • the dimension (width dimension) W101 in the first direction X is increased.
  • the width dimension W102 of the wipes sheet 110 is 1.1 to 1.5 times the width dimension W101 before being pulled. Have.
  • the concave line 118 forming the pattern area 140 is formed by fiber interlacing and is flexible and easy to deform, tensile forces F101 and F102 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 118, and the outer dimensions of the first to fourth designs 141 to 144 increase.
  • the width dimension W104 of the first portion 181 in the state where the wipes sheet 110 is stretched by 5% in the first direction X in the wet state is the width dimension W103 of the first portion 181 before being pulled.
  • the width dimension W104 of the first portion 181 in the state of 1.2 to 2.0 times and stretched by 30% in the first direction X is 1.5 to 1.5 times the width dimension W103 of the first portion 181 before being pulled. It is 2.5 times.
  • the width dimensions W103 and W104 of the concave line 118 are expanded and the outer dimensions thereof are increased, so that the wiping area is increased and the wiping performance is further improved.
  • the concave line is shaped by embossing
  • the tensile force F101 or F102 acts by curing the fiber and partially forming a film
  • the thin bottom portion 118a May be broken without being stretched, but since the concave line 118 is shaped by fiber entanglement and has extensibility, when it is pulled in the first direction X, the fibers are entangled in the bottom portion 118a
  • the width dimensions W103 and W104 are gradually expanded, and it is possible to suppress breakage of a part of the bottom portion 118a.
  • the bottom 118a of the concave line 118 is thin compared to the other part of the wipes sheet 110, and the low density region 151 causes the fibers to be entangled even with a relatively small tensile force. Can be said to be easily.
  • the high density region 152 is positioned on both side walls 118 b of the concave line 118 and is difficult to expand as compared with the low density region 151, it is possible that the entire concave line 118 loses its shape even if the bottom 118 a is elongated. Absent.
  • the “pulling force in the first direction X” is, in addition to the forces F101 and F102 generated by the user holding the both sides of the wipes sheet 110 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 110 is fixed, the other side may be pulled in a direction away from the one side.
  • the width dimensions W103 and W104 of the concave line 118 are expanded, so that the contours of the first to fourth design parts 141-144 appear more clearly, and the visibility is improved.
  • the width W103 of the concave line 118 is relatively small, and when the external shape is difficult to see or the overall external appearance is narrow.
  • the outer shape becomes clear and easily visible, or the narrow and distorted design is expanded. , Can be changed to a balanced shape.
  • the wipes sheet 110 is used.
  • the width dimension in the first direction X is larger than the width dimension in the second direction Y of the second portion 182.
  • the outer shape of each symbol 141-144 becomes clearer, and the first portion 181 retains its shape, so that each symbol 141- The overall shape of the 144 is not significantly distorted.
  • the designs 141B and 142B have a character design 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.
  • the pulp fibers 128 located in the intermediate fiber layer 123 are exposed to the outside of the first surface 111 made of the hydrophobic layer. It has not been.
  • the pulp fibers 128 constitute an absorption layer that absorbs and holds the impregnating solution, and thus the hydrophobicity
  • the layer is not exposed to the outside air, and drying can be prevented to suppress evaporation of the chemical solution.
  • the fibers constituting the bottom portion 118a of the concave line 118 are entangled and the intermediate fiber layer 123 A portion of the pulp fibers 128 located in the first fiber layer 121 passes through the inter-fiber gap of the fibers constituting the first fiber layer 121 and is exposed to the outside from the first surface 111.
  • the user pulls the wipes sheet 110 in the first direction X to spread the concave lines 118 and expose a part of the pulp fibers 128 to the bottom.
  • the impregnating solution previously held in the fiber gap of the first fiber layer 121 and the impregnating solution absorbed in the pulp fiber 128 are used to effectively and hygienically stain It can be wiped off.
  • the surface of the first surface 111 which is a hydrophobic surface, is exposed to pulp fibers and other hydrophilic fibers on the surface of the first surface 111, and the first surface 111 is By changing from a hydrophobic surface to a hydrophilic surface, the wipeability at the concave line 118 is improved.
  • a water repellent agent such as silicon may be applied to the surface of the first fiber layer 121 forming the first surface 111 to prevent the pulp fibers 128 from drying before use.
  • the smoothness is improved, so when the wet wipes sheet 110 is popped up from the storage container, the next wipes sheet 110 is pulled out together ((1) Can be suppressed.
  • the concave lines 118 are formed on the first surface 111 of the wipes sheet 110, the contact area of the facing surfaces of the wipes sheets 110 in contact with each other in the laminated state is reduced, thereby suppressing further blurring. It is easy to pull out.
  • the user pulls the wipes sheet 110 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.
  • the entanglement of the fibers in the concave line 118 is unwound and the width dimension is Or the pulp fibers 128 of the intermediate fiber layer 123 can be exposed.
  • the wipes sheet 110 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 part of the bottom 118a may be broken when transported in the machine direction in the manufacturing process, or in use When pulled in one direction X, there is a possibility that the bottom portion 118a may extend too much and the sheet shape may be broken or a part may be broken.
  • the tensile strength in the first direction X exceeds 1.0 N / 25 mm, the tensile strength becomes too high, and the force that the user pulls lightly before use makes the bottom portion 118 a difficult to stretch and the concave line 118
  • the width dimension W104 does not expand.
  • the maximum elongation when pulling the wipes sheet 110 in the first direction X is 2.0 to 3.0 times, and the maximum elongation when pulling the second direction Y is 1. It is 2 to 1.8 times.
  • the maximum elongation of the wipes sheet 110 is 1.0 times the size of the width dimension W101 before measurement, and the width dimension W101 of the wipes sheet 110 is 100 mm, for example.
  • 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 110 is impregnated with a drug (water retention rate 300%), the wipes sheet 110 is cut with a cutting tool so that the second pattern 142 is positioned at the center in the first direction X. Thus, a strip-shaped test piece 193 having a length in the first direction of 150 mm and a length in the second direction Y of 25 mm is formed.
  • the test is performed so that the first direction X is in the vertical direction between the fixed chuck 191 and the movable chuck 192.
  • the piece 193 was placed, and the maximum tensile strength and the maximum elongation were measured under the conditions of a chuck distance L101 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 193 so that the second direction Y is in the vertical direction (vertical direction) of the tester.
  • the movable chuck 192 was moved in a direction away from the fixed chuck 191, and the maximum tensile strength (N / 25 mm) was determined when the distance L101 between chucks was 105 mm (elongation 5%). Further, the tensile strength at the time when the test piece was broken by increasing the distance L101 between chucks was taken as the maximum tensile strength, and the elongation was taken as the maximum elongation (fold). Furthermore, the separation distance R102 between the marks T101 and T102 of the first part 181 when the distance L101 between chucks is 130 mm (elongation 30%) is measured with a ruler, and the separation distance ratio (R102 / R101) 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 128 is exposed on the surface of the first surface 111 when the wipes sheet 110 is pulled in the first direction X, for example, a test using the above-mentioned tensile tester The piece 193 is pulled in the first direction X, and when it is pulled by 30% (elongation), removed from the chuck 191, 192 and confirmed by observing the concave line 118 forming the first portion 181 with an electron microscope Can.
  • the first surface 111 composed of the first fiber layer 121 mainly composed of hydrophobic fibers is changed from the hydrophobic surface to the hydrophilic surface, at least the first surface 111 of the pulp fiber (hydrophilic fibers) 128 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 128 and the hydrophobic fibers constituting the first surface 111.
  • the wipes sheet 110 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.
  • An apparatus for manufacturing the wipes sheet 110 and part of the manufacturing process will be described below.
  • 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.
  • the fiber web is the base of the intermediate fiber layer 123 between the fiber aggregates formed by the card method which is the base of the first and second fiber layers 121 and 122 of the wipes sheet 110. 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 fiber entanglement and concave portions corresponding to the concave lines 118 forming the graphic area 140.
  • the fiber gap is filled with water and the fiber density is increased.
  • the fiber 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.
  • water may be sprayed by a spray without requiring water pressure to move the fibers.
  • FIG. 8 is a perspective view of a water jet process 400 for forming in the fiber web 401 a concave portion 422 corresponding to the concave line 118 of the graphic area 140.
  • the water jet process 400 includes a suction drum 406 for holding the fiber web transported in the machine direction MD on the outer circumferential surface, and a nozzle plate 407 for jetting water to the fiber web located on the outer circumferential surface of the suction drum 406.
  • the fiber web 401 has a first surface 401 a facing the nozzle plate 407 on the outer peripheral surface of the suction drum 406 and a second surface 401 b opposite the outer peripheral surface of the suction drum 406 located on the opposite side.
  • the suction drum 406 includes a shaped support 406 a having linear protrusions 420.
  • the outer peripheral surface of the shaping support 406a is in the form of a mesh having a plurality of suction pipes 421, and the fiber web 401 is drawn to the shaping support 406a while rotating the shaping support 406a around the axis K401. While being held on the surface, it is transported to a dehydrator (not shown) via a downstream transport means (not shown).
  • the nozzle plate 407 jets water toward the first surface 401 a side of the fiber web 401 held on the outer peripheral surface of the suction drum 406 to intertwine the fibers and is located on the outer peripheral surface of the shaping support 406 a
  • a concavo-convex pattern is provided on the second surface 401b side of the fiber web 401.
  • the linear convex portion 420 is formed integrally with or separately from the outer peripheral surface of the shaped support 406 a.
  • the fiber web 401 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
  • the liquid supply means for impregnating the liquid containing medicines and perfumes with or without a dryer.
  • the fiber webs After the fiber webs have been subjected to these steps, they are cut into appropriate sizes by a cutting means.
  • the dryer a part of the heat fusible fibers constituting the fiber web 401 is heat-fused to improve the sheet strength.
  • a plurality of nozzles aligned in the cross direction CD jets water to the first surface 401a of the fiber web 401 held on the outer peripheral surface of the shaped support 406a of the suction drum 406.
  • the fiber web 401 is preliminarily entangled with fibers in a suction drum (not shown) located upstream of the suction drum 406 so that the fibers are entangled by a weak force so that the entire surface is flat.
  • the fiber web 401 is pressed against the linear convex portion 420 positioned on the outer peripheral surface of the shaping support 406 a by the water flow jetted from the nozzle plate 407 while being sucked from the pipe 421.
  • FIG. 9 (a) is an enlarged view of the fiber web 401 on the linear convex portion 420 before the water flow is injected in the suction drum 406, and FIG. 9 (b) is a line after the water flow is injected in the suction drum.
  • FIG. 6 is an enlarged view of a fiber web 401 on the convex portion 420.
  • the linear convex portions 420 have first, second and third linear convex portions 420a, 420b, and 420 having different designs corresponding to the first, second and fourth design portions 141, 142, 144 of the wipes sheet 110. It has 420c. Since the linear convex portion 420 is a portion protruding from the outer peripheral surface of the shaping support 406 a, various shapes such as a character and a company logo are adopted for shaping on the fiber web 401 in addition to the illustrated mode. be able to.
  • the linear convex portion 420 is disposed on the entire outer periphery of the shaped support 406 a, and all wipes sheets 110 manufactured are also arranged such that a graphic portion having at least one independent and closed design is disposed. It has a pattern. Further, the height of the linear convex portion 420 is designed so that the line width and the height change in the extending direction according to the design to be shaped.
  • the fibers move to the periphery by the water flow and are not sucked by the suction pipe 421.
  • the fiber density is lower than that of the area.
  • the fibers moved from above the linear convex portion 420 are accumulated and the fiber density is relatively high.
  • the fiber density is higher than that of the thin portion 424, and the fiber density is lower than that of the first portion 431.
  • the pulp fibers located in the intermediate fiber layer of the fiber web 401 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 424 located on the linear convex portion 420, 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 431, 432. It is lower.
  • the water jet process can form a design pattern formed by entanglement of fibers on the fiber web 401, and the concave portion 422, the first portion 431 and the second portion 432 of the fiber web 401 are respectively wipes It corresponds to the concave line 118 (low density area 151), the high density area 152 and the medium density area 153 of the sheet 110.
  • the fibers are reoriented by the linear convex portions 420 disposed on the outer peripheral surface of the shaped support 406 a of the suction drum 406, and the concave portions 422 are formed on the second surface 401 b side of the fiber web 401.
  • relatively thin holes are not formed in the thin portion 424 located in the linear convex portion 420 in the extending direction, and the thin convex portion 420 is surrounded by the linear convex portion 420 in the manufacturing process. The part never falls off.
  • the spunlace manufacturing method by hydroentanglement was illustrated, but air, water vapor, etc. besides water can be used as long as the concave line 118 can be formed by fiber interlacing by fluid treatment. It is also possible to employ a fluid-based manufacturing method.
  • the fiber non-woven fabric sheet according to the present invention is not limited to wipes, and hygiene of sanitary napkins, disposable diapers, breast milk 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.
  • a wipes sheet (a wiping sheet, a nonwoven fabric for wipes) 210 shown as an example of the fiber non-woven fabric sheet of the second invention is a bulky and flexible sheet formed by interlacing fibers. It has a first direction X and a second direction Y which intersect with each other, a thickness direction Z, and first and second surfaces 211 and 212 which face each other in the thickness direction Z.
  • the first surface 211 is also referred to as a wiping surface
  • the second surface 212 is also referred to as a non-wipe surface.
  • the wipes sheet 210 is substantially rectangular and opposed to each other in the second direction Y and extends in the first direction X, and the first and second end edges 210a and 210b opposed in the first direction X to each other. It has an outer peripheral edge composed of first and second side edges 210c and 210d extending in two directions Y.
  • the shape of the wipes sheet 210 is not limited to the illustrated example, and may have various known shapes such as square, circle, oval, triangle, polygon and the like, and various sizes may be selected according to the application. can do.
  • the wipes sheet 210 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.
  • 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 .
  • 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.
  • the wipes sheet 210 includes a first fiber layer 221 forming the first surface 211 side, a second fiber layer 222 forming the second surface 212 side, the first fiber layer 221, and the second fiber layer 221. And an intermediate fiber layer (third fiber layer) 223 positioned between them and the fiber layer 222.
  • the first fiber layer 221, the second fiber layer 222, and the intermediate fiber layer 223 have a multi-layered structure in which the fibers constituting them are three-dimensionally entangled with each other to form a composite.
  • a mixed fiber web of hydrophilic fibers and synthetic fibers can be used.
  • 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.
  • 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.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PE polyethylene
  • core-sheath type composite fibers using these fibers are used. be able to.
  • 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.
  • 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 223 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 223 is relatively high, and the visibility of the pattern area 240 can be enhanced. In addition to pulp fibers, manila hemp, mochi, three mochi, and linter pulp may be mixed.
  • first and second fiber layers 221 and 222 are mainly composed of hydrophobic fibers
  • the hydrophobic layer and the intermediate fiber layer 223 are mainly composed of hydrophilic fibers, so it can be said to be a hydrophilic layer.
  • the thickness dimension D201 of the wipes sheet 210 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 .
  • a thickness measurement device manufactured by PEACOCK, measurement surface ⁇ 44 mm, measurement pressure 3 g / cm 3 .
  • the average fineness of rayon fibers and PET fibers used in the first and second fiber layers 221 and 222 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 221 and 222 forming the first and second surfaces of the wipes sheet 210 and the average fiber length are made larger than the constituent fibers of the intermediate fiber layer 223. (Fiber unevenness) becomes good, and the difference in the amount of fibers of the concave line 218 constituting the pattern area 240 can be suppressed, and the required visibility and shape stability can be secured.
  • the wipes sheet 210 has a graphic area 240 formed of a concave line 218 which is concave toward the second surface 212 on the first surface 211.
  • the concave line 218 is formed by entanglement of fibers, and has a bottom portion 218a with a bottom and both side walls 218b and 218b surrounding the bottom portion 218a.
  • Concave line is bottomed means that a continuous opening is not formed in the extending direction of the concave line 218, and the large and small fibers formed by the reorientation of the fibers 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.
  • the concave line 218 has a bottom, for example, when the wipes sheet 210 is used as a wipe sheet, excrement that has entered the concave line 218 after being wiped off is used by the user's finger. There is no adhesion.
  • the wipes sheet 210 has a higher fiber density than the low density area 251 located at the bottom 218 a of the concave line 218 and the low density area 251 located at least on both sides of the low density area 251.
  • a high density region 252 and a medium density region 253 having a higher fiber density than the low density region 251 and a lower fiber density than the high density region 252 are included. That is, the fiber density is the lowest at the bottom 218a of the concave line 218, and the high density region 252 having the highest fiber density is located at least on both sides so as to surround the outer periphery of the bottom 218a.
  • the wipes sheet 210 has such a difference in fiber density, and the high density area 252 is positioned so as to surround the bottom 218a of the concave line 218 consisting of the low density area 251, and a contrast due to the density difference is formed.
  • the dense region 252 is visually recognized in a dark color so as to border the outer peripheral edge of (the bottom portion 218a of) the concave line 218 due to the density of fibers, and the contour of the concave line 218 may be clearly visible.
  • the high density region 252 has a projecting portion 254 which protrudes outward more than the middle density region 253 on the second surface 212 side.
  • the high density region 252 has a three-dimensional shape that protrudes outward on the second surface 212 side, when viewed by the user from the second surface 212 side where the concave line 218 is not formed. Even, the contour of the concave line 218 can be grasped. Therefore, the contour of the concave line 218 can be seen more clearly not only from the first surface 211 but also from the second surface 212 in combination with the contrast due to color density due to the density difference between the high density region 252 and the low density region 251. It can be done.
  • a high water absorption pulp fiber is positioned in the intermediate fiber layer 223 interposed between the first fiber layer 221 and the second fiber layer 222, thereby making the product Before use, the pulp fiber is not exposed to the outside, the chemical solution absorbed by the pulp fiber does not evaporate, and the storage stability of the chemical solution is excellent.
  • the bottom 218a of the concave line 218 of the wipes sheet 210 that is, the content (% by weight) of pulp fibers located in the low density area 251 is the content (% by weight) of pulp fibers in the high density area 252 and the medium density area 253 It is smaller than).
  • the low density region 251 has a relatively low pulp fiber content, it can be said that the liquid retention is relatively low, but the bottom 218 a of the concave line 218 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 252 and 253 without requiring high liquid retention, and it becomes more difficult to break.
  • a portion of the wipes sheet 210 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 210 was cut along a cut line extending in the first direction X orthogonal to the second direction Y (the machine direction MD in the manufacturing process) so as to intersect the concave line 218 of the symbol area 240.
  • the projecting portion 254 is observed at the top, enlarged 70 to 300 times around the middle point in the thickness direction Z of the high density region 252 In each of the low density area 251, the high density area 252 and the medium density area 253, the number of cross-sections of pulp fibers per fixed area (about 0.5 mm 2 ) was counted.
  • 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 210 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 density of pulp fibers in each region.
  • the symbol area 240 has a first symbol part 241 and a second symbol part 242 which have different designs.
  • the first symbol portion 241 has a substantially circular outline 241A formed from the concave line 218 and a substantially star-shaped pattern 241B surrounded by the outline 241A.
  • the second symbol portion 242 has a substantially elliptical outline 242A, and a pattern 242B surrounded by the outline 242A, in which a plurality of characters are arranged in a plurality of lines aligned in the second direction Y.
  • the first symbol portion 241 and the second symbol portion 242 are located side by side at the approximate center in the first direction X.
  • the symbol area 240 further includes a third symbol part 243 formed of a part of the first and second symbol parts 241 and 242 and a relatively small fourth symbol part 244 in a heart shape.
  • the first and second design parts 241 and 242 have a relatively large area on the first surface 211, and can exhibit the complete design by itself to impress the user. It can be said that it is a design.
  • the third pattern portion 243 is incomplete and does not exhibit any design property by itself, and the fourth pattern portion 244 is relatively small, and a design which impresses the user by itself
  • the third and fourth symbol parts 243 and 244 can be said to be secondary symbols because they can not be said to exhibit sex.
  • the first and second designs 241 and 242 have independent and closed outlines 241A and 242A, and the outlines 241A and 242A are located apart from the outer peripheral edge of the wipes sheet 210.
  • the outlines 241A and 242A of the first and second design parts 241 and 242 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 cut, and means one that is located apart from the outer peripheral edge of the wipes sheet 210 and has completely independent design. Therefore, for example, as in the case of the third design portion 243, those whose outline 243A can not reach the outer periphery of the sheet and can not grasp the overall design do not correspond to independent outlines.
  • the outlines 241A and 242A of the first and second designs 241 and 242 are closed, the outlines 241A and 242A extend continuously or discontinuously so as to surround the designs 241B and 242B. It means that.
  • the outlines 241A and 242A may have various known shapes such as a circle, an ellipse, a triangle, and a polygon, as long as the outlines 241A and 242B surround the patterns 241B and 242B.
  • the designs 241B and 242B of the first and second designs 241 and 242 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).
  • the first and second pattern parts 241 and 242 are main design areas having a three-dimensional shape, and can also be referred to as wiping areas for wiping out excrement and dust. That is, when using the wipes sheet 210, with the first surface 211 as a wiping surface, dirt attached to the surface to be wiped such as a body or a table is an edge on the first surface 211 side of both side walls 218b of the concave line 218 (Edge) 218c can be used to effectively wipe away dirt.
  • the first and second symbol parts 241 and 242 have required sizes. It is preferable to have an area of at least 10% or more of the surface area of the wipes sheet 210, for example. On the other hand, since the fourth symbol portion 244 has a relatively small area, it does not function as a main wiping area.
  • 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.
  • the designability is further improved as compared to the printed pattern, and the raised outer peripheral edge can wipe off the dirt.
  • the design itself 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.
  • 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.
  • it 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.
  • 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.
  • the embossed portion may hit the skin and may cause discomfort or irritation, and may be easily broken.
  • the concave lines 218 forming the pattern area 240 are formed by the entanglement of fibers, as a whole nonwoven fabric as compared with the case where they are formed by the heat embossing process. It is soft and has a good touch, and can maintain the characteristic drape of spunlace nonwoven fabric.
  • the first and second designs 241 and 242 have independent outlines 241A and 242A, 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.
  • the pattern area 240 When the pattern area 240 itself is raised, light may be scattered and its outline may be blurred. However, since it is formed by the concave line 218, the outline is made clearer to the user. Can be made to understand. Further, since the portion other than the concave line 218 is in direct sliding contact with the surface to be wiped off at the time of wiping, the shape of the concave line 218 is not broken by friction and the pattern area 240 is not largely deformed.
  • the outlines 241A and 242A are closed, and the designs 241B and 242B are arranged so as to be surrounded by the outlines 241A and 242A. Even when the user pulls or loosens the wipes sheet 210 by deforming the wipes sheet 210 because the designs 241B and 242B are surrounded by the outlines 241A and 242A, the outlines 241A and 242A become the starting point. As the shape is deformed, the patterns 241B and 242B can maintain their shape.
  • third and fourth symbol portions 243 and 244 are located around the first and second symbol portions 241 and 242, which are the main wiping areas. Therefore, when the wipes sheet 210 is squeezed, the third and fourth symbol parts 243 and 244 are deformed as a starting point, and the deformation of the first and second symbol parts 241 and 242 located at the center is suppressed. It can be said that
  • the first and second designs 241 and 242 preferably have a curved concave line 218 from the viewpoint of wiping performance and aesthetics. Also in the present embodiment, the outlines 241A and 242A are curved, and the patterns 241B and 242B also have curved portions. As described above, the first and second pattern parts 241 and 242 can have a soft and well-perceived impression by having the curved concave line 218, and can be deformed according to the shape of the surface to be wiped. For example, the first and second pattern portions 241 and 242 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 211 is a wiping surface by positioning the symbol area 240 including the concave line 218 on the first surface 211 side. Therefore, it can be said that the symbol area 240 also has a function of guiding the user to use the first surface 211 as a wiping surface.
  • the first and second pattern parts 241 and 242 of the pattern area 240 can function as a wiping area, but the third and fourth pattern parts 243 and 244 are also formed from the concave line 218 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 241 to 244 in accordance with the size of the stain at the time of wiping.
  • the recessed lines 218 forming the outlines 241A and 242A are wider than the recessed lines 218 forming the designs 241B and 242B as a whole.
  • the relatively wide outlines 241A, 242A allow the user's attention to be drawn to draw out the figures 241B, 242B surrounded by the user.
  • persistent dirt can be scraped off by relatively narrow and densely gathered patterns 241B and 242B located inside the dirt .
  • the pattern area 240 has a plurality of first to fourth pattern portions 241 to 244 with different designs, thereby dividing the dimensions of the wipes sheet 210 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 (lateral direction) of the wipes sheet 210. Thus, as long as the vertical and horizontal directions of the wipes sheet 210 can be recognized, the symbol area 240 may be asymmetric with respect to any one of the first virtual line P and the second virtual line Q.
  • the second direction Y corresponds to the machine direction in the manufacturing process
  • the first direction X corresponds to the direction intersecting the machine direction
  • the constituent fibers are mainly oriented in the second direction Y.
  • the wiping direction is a direction in which the fibers are oriented
  • the sheet strength is along the second direction Y higher than the first direction X
  • the design region 240 asymmetrically, the second direction Y is the wiping direction It can be recognized as (vertical direction).
  • the symbol 242B of the second symbol part 242 by arranging the design element so that the second direction Y is in the vertical direction, the user can be guided to wipe in the second direction Y.
  • the second symbol portion 242 is asymmetrical with respect to an imaginary line (not shown) which divides the dimension in the first direction X into two equal parts.
  • the concave line 218 forming the symbol area 240 has a first portion 281 extending in the second direction Y and a second portion 282 extending in the first direction X.
  • the fiber orientation in the second portion 282 is in the second direction Y, and the number of fibers per unit area oriented along the second direction Y in the second portion 282 is along the second direction Y in the first portion 281. It is more than the number of fibers per unit area oriented.
  • the fiber orientation is in the second direction Y, when the second direction Y is the wiping direction, the required tensile strength is exhibited, and the concave shape is not broken. .
  • the fiber orientation is the direction in which the fibers are flowing in a plan view of the wipes sheet 210, and "the fiber orientation of the second portion 282 is the second direction" is the second portion 282.
  • 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.
  • fiber orientation from the tensile strength ratio (first direction X / second direction Y) of the second portion 282 in the first direction X and the second direction Y using a tensile tester described later May be measured.
  • the first part 281 extends along the first imaginary line P if it is linear, the second part 282 along the second imaginary line Q if it is linear Is an extending part.
  • the first part 281 is a part that is convex in the first direction X
  • the second portion 282 is a portion convexly bent in the second direction Y.
  • the outlines of the upper and lower portions (for example, 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.
  • the shape is unlikely to collapse and the width dimension tends to be narrow.
  • the first direction X is the wiping direction
  • the width dimension of the first portion 281 Spreads.
  • 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.
  • the patterns 241B and 242B of the first and second pattern portions 241 and 242 an idea combination of figure design and characters may be adopted.
  • 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.
  • 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.
  • 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.
  • a word that the infant has not remembered or has just remembered can be adopted for the patterns 241B and 242B, and the word can be fixed in the infant's memory by repeating with the parent and child at the time of use.
  • the symbol area 240 can also be provided with a function as one of the tools capable of creating good communication between the parent and child through the wipes sheet 210.
  • the wipes sheet 210 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 possible to carry and use the wipes sheet 210 positively when going out, without being hesitated be able to.
  • the logo design of a company is adopted as the design area 240, it is possible to effectively make the user recognize the brand, and it is possible to exhibit an excellent advertisement function. Therefore, it can be said that the wipes sheet 210 has both the basic functions as wipes and the emotional value that causes the consumer to buy.
  • the second side 212 which is a non-wipe surface may be folded in two and used. In such a mode of use, the second surfaces 212 of the folded portions come in contact with each other, and during the wiping operation, the contacting portions may be shifted, so that the force does not act on the wiping surface sufficiently. .
  • the protruding portions 254 of the high density area 252 located on the second surface 212 side function as a stopper that is caught on the opposite surface to prevent the sliding of the folded portions thereof, and is applied during the wiping operation. Misalignment of the sheets can be suppressed, and sufficient wiping force can be transmitted to the wiping surface.
  • a design area 240 of a different design for each wipes sheet 210 when the user takes out from a container (dispenser) housed in a state where a plurality of wipes sheets 210 are stacked, 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.
  • wipes sheet 210 wipes the sheet by grasping and pulling the both sides with first hand 208 and 209 in the first direction X, respectively, and disentangling the fibers.
  • the horizontal width of 210 may be expanded and used.
  • the sheets are pulled so as to stretch them out to check the sheet strength and expand the sheet area May be used.
  • the wipes sheet 210 when the wipes sheet 210 is pulled in the first direction X, entanglement of fibers is released not only in the symbol area 240 but also in other areas, and the entire wipes sheet 210 is obtained.
  • the dimension (width dimension) W201 in the first direction X is increased.
  • the width W202 of the wipes sheet 210 is 1.1 to 1.5 times as large as the width W201 before being pulled by the application of the tensile forces F201 and F202 in the first direction X. Have.
  • the concave line 218 forming the pattern area 240 is formed by fiber entanglement and is flexible and easy to deform, tensile forces F201 and F202 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 218, and the outer dimensions of the first to fourth designs 241 to 244 increase.
  • the width dimension W204 of the first portion 281 in the state where the wipes sheet 210 is stretched 5% in the first direction X in the wet state is the width dimension W203 of the first portion 281 before being pulled.
  • the width dimension W204 of the first portion 281 in the state of 1.2 to 2.0 times and stretched by 30% in the first direction X is 1.5 to 1.5 times the width dimension W203 of the first portion 281 before being pulled. It is 2.5 times.
  • the width dimensions W203 and W204 of the concave line 218 are expanded and the outer dimensions thereof are increased, so that the wiping area is increased and the wiping performance is further improved.
  • the concave line is shaped by embossing
  • the tensile force F201 or F202 acts by curing the fiber and partially forming a film
  • the thin bottom portion 218a May be broken without being stretched, but since the concave line 218 is shaped by fiber entanglement and has extensibility, when it is pulled in the first direction X, fiber entanglement is broken at the bottom 218a.
  • the width dimensions W203 and W204 can be gradually expanded, and breakage of a part of the bottom portion 218a can be suppressed.
  • the bottom 218 a of the concave line 218 is thin compared to the other part of the wipes sheet 210 and is a low density region 251 so that even if the tensile force is relatively small, the entanglement of the fibers is released. Can be said to be easily. Since the high density region 252 is located on both side walls 218b of the concave line 218 and it is difficult to expand as compared to the low density region 251, it is possible that the entire concave line 218 loses its shape even if the bottom 218a is extended. Absent.
  • the “pulling force in the first direction X” is the force generated by the user holding the both sides of the wipes sheet 210 in the first direction X and pulling in opposite directions as shown in the example. In the case where one side of the wipes sheet 210 is fixed, the other side may be pulled in a direction away from the one side.
  • the width dimensions W203 and W204 of the concave line 218 are expanded, so that the contours of the first to fourth design parts 241 to 244 appear more clearly and the visibility is improved.
  • the width W203 of the concave line 218 is relatively small, and the overall appearance is narrow if the external appearance is difficult to see.
  • the outer shape becomes clear and easily visible, or the narrow and distorted design is expanded. , Can be changed to a balanced shape.
  • the wipes sheet 210 When it is pulled in the first direction X, the width dimension in the first direction X becomes larger than the width dimension in the second direction Y of the second portion 282. As the width dimension of the first portion 281 in the first direction X is expanded, the outlines of the respective symbol portions 241 to 244 become clearer, and the first portion 281 retains its shape. The overall geometry of the 244 is not significantly disturbed. When the designs 241B and 242B have a character design or the like in which the second direction Y is up and down, the width can be changed to a rounded shape that is preferred by infants and the like.
  • the pulp fibers 228 located in the intermediate fiber layer 223 are exposed to the outside of the first surface 211 made of the hydrophobic layer. It has not been.
  • the pulp fibers 228 constitute an absorption layer that absorbs and holds the impregnating solution, and thus hydrophobic
  • the layer is not exposed to the outside air, and drying can be prevented to suppress evaporation of the chemical solution.
  • the entanglement of the fibers constituting the bottom portion 218 a of the concave line 218 is unfolded to form the intermediate fiber layer 223.
  • a part of the pulp fibers 228 located in the first fiber layer 221 is exposed to the outside from the first surface 211 by passing through the inter-fiber gap of the fibers constituting the first fiber layer 221.
  • the user pulls the wipes sheet 210 in the first direction X to spread the concave lines 218 and expose a part of the pulp fibers 228 to the outside.
  • the impregnating liquid previously held in the fiber gap of the first fiber layer 221 and the impregnating liquid absorbed in the pulp fibers 228 are used to effectively and hygienically stain It can be wiped off.
  • pulp fibers and other hydrophilic fibers are exposed on the surface of the first surface 211, which is the hydrophobic surface, and the first surface 211 is exposed.
  • the wipeability at the concave line 218 is improved.
  • a water repellent agent such as silicon may be applied to the surface of the first fiber layer 221 forming the first surface 211 to perform water repelling treatment.
  • the smoothness is improved, so when the wet wipes sheet 210 pops up from the storage container, the next wipes sheet 210 is pulled out together ((1) Can be suppressed.
  • the concave lines 218 are formed on the first surface 211 of the wipes sheet 210, the contact area of the opposing surfaces of the wipes sheets 210 in contact with each other in the laminated state is reduced, thereby suppressing further blurring. It is easy to pull out.
  • the user pulls the wipes sheet 210 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.
  • the entanglement of the fibers in the concave line 218 is unfolded and the width dimension is Can be increased, or the pulp fibers 228 of the intermediate fiber layer 223 can be exposed.
  • the wipes sheet 210 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 part of the bottom 218a may be broken when transported in the machine direction in the manufacturing process, or in use When pulled in one direction X, there is a possibility that the bottom portion 218a may be stretched so much that the sheet shape may be broken or a part may be broken.
  • the tensile strength in the first direction X exceeds 1.0 N / 25 mm, the tensile strength becomes too high, and the force by which the user pulls lightly before use makes the bottom portion 218 a difficult to stretch and the concave line 218
  • the width dimension W204 does not expand.
  • the maximum elongation when the wipes sheet 210 is pulled in the first direction X is 2.0 to 3.0 times
  • the maximum elongation when the wipes sheet 210 is drawn in the second direction Y is 1. It is 2 to 1.8 times.
  • the maximum elongation of the wipes sheet 210 is 1.0 times the size of the width dimension W201 before measurement, and the width dimension W201 of the wipes sheet 210 is 100 mm, for example.
  • 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. 16, after the wipes sheet 210 is impregnated with a drug (water retention rate 250%), the wipes sheet 210 is cut with a cutting tool so that the second pattern portion 242 is positioned at the center in the first direction X. Thus, a strip-shaped test piece 293 having a length dimension of 150 mm in the first direction ⁇ a length dimension of 25 mm in the second direction Y was obtained.
  • the test is performed so that the first direction X is in the longitudinal direction between the fixed chuck 291 and the movable chuck 292.
  • the piece 293 was placed, and the maximum tensile strength and the maximum elongation were measured under the conditions of a chuck distance L201 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 293 so that the second direction Y was in the vertical direction (vertical direction) of the tester.
  • the movable chuck 292 was moved in a direction away from the fixed chuck 291 to determine the maximum tensile strength (N / 25 mm) when the distance L201 between chucks was 105 mm (elongation 5%). Further, the tensile strength at the time when the test piece was broken by increasing the distance L201 between chucks was taken as the maximum tensile strength, and the elongation was taken as the maximum elongation (fold). Further, the separation distance R202 between the marks T201 and T202 of the first portion 281 when the distance L201 between chucks is 130 mm (elongation 30%) is measured with a ruler, and the separation distance ratio (R202 / R201) 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 228 is exposed on the surface of the first surface 211 when the wipes sheet 210 is pulled in the first direction X, for example, a test using the above-mentioned tensile tester The piece 293 is pulled in the first direction X and removed from the chucks 291, 292 when it is pulled by 30% (elongation), and confirmed by observing the concave line 218 forming the first portion 281 with an electron microscope Can.
  • the first surface 211 composed of the first fiber layer 221 mainly composed of hydrophobic fibers is changed from the hydrophobic surface to the hydrophilic surface, at least the first surface 211 of the pulp fibers (hydrophilic fibers) 228 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 228 and the hydrophobic fibers constituting the first surface 211.
  • the wipes sheet 210 according to the present invention is a manufacturing 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.
  • An apparatus for manufacturing the wipes sheet 210 and part of the manufacturing process will be described below.
  • a fiber web formed by laminating fiber assemblies 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.
  • the fiber web is formed by an air laid method corresponding to the intermediate fiber layer 223 between fiber aggregates formed by the card method corresponding to the first and second fiber layers 221 and 222 of the wipes sheet 210. 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 fiber entangling and recessed portions corresponding to the recessed lines 218 forming the graphic area 240.
  • the fiber gap is filled with water and the fiber density is increased.
  • the fiber 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.
  • water may be sprayed by a spray without requiring water pressure to move the fibers.
  • FIG. 17 is a perspective view of the water jet process 500 for forming a concave portion 522 corresponding to the concave line 218 of the pattern area 240 in the fiber web 501.
  • the water jet process 500 includes a suction drum 506 for holding the fiber web transported in the machine direction MD on the outer circumferential surface, and a nozzle plate 507 for jetting water to the fiber web located on the outer circumferential surface of the suction drum 506.
  • the fiber web 501 has a first surface 501a facing the nozzle plate 507 on the outer peripheral surface of the suction drum 506, and a second surface 501b facing the outer peripheral surface of the suction drum 506 located on the opposite side.
  • the suction drum 506 includes a shaped support 506 a having linear protrusions 520.
  • the outer peripheral surface of the shaping support 506a is in the form of a mesh having a plurality of suction tubes 521, and the fiber web 501 is drawn to the shaping support 506a while rotating the shaping support 506a around the axis K501. While being held on the surface, it is transported to a dehydrator (not shown) via a downstream transport means (not shown).
  • the nozzle plate 507 jets water toward the first surface 501 a side of the fiber web 501 held on the outer peripheral surface of the suction drum 506 to entangle the fibers with each other and is located on the outer peripheral surface of the shaping support 506 a
  • a concavo-convex pattern is provided on the second surface 501b side of the fiber web 501.
  • the linear convex portion 520 is formed integrally or separately with the outer peripheral surface of the shaped support 506 a.
  • the fiber web 501 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
  • the wipes sheet 210 used in the above it is conveyed to the liquid supply means for impregnating the liquid containing medicines and perfumes with or without a drier.
  • the fiber webs After the fiber webs have been subjected to these steps, they are cut into appropriate sizes by a cutting means.
  • a part of the heat fusible fibers constituting the fiber web 501 is heat-fused to improve the sheet strength.
  • a plurality of nozzles arranged in the cross direction CD jets water to the first surface 501a of the fiber web 501 held on the outer peripheral surface of the shaped support 506a of the suction drum 506.
  • the fiber web 501 is preliminarily entangled with fibers in a suction drum (not shown) located upstream of the suction drum 506 so that the fibers are entangled by a weak force and the entire surface is flat.
  • the fiber web 501 is pressed against the linear convex portion 520 positioned on the outer peripheral surface of the shaped support 506 a by the water flow jetted from the nozzle plate 507 while being sucked from the pipe 521.
  • FIG. 18 (a) is an enlarged view of the fiber web 501 on the linear convex portion 520 before the water flow is injected in the suction drum 506, and FIG. 18 (b) is a line after the water flow is injected in the suction drum.
  • FIG. 16 is an enlarged view of the fiber web 501 on the convex portion 520.
  • the linear convex portions 520 have first, second and third linear convex portions 520a, 520b, having different designs corresponding to the first, second and fourth design portions 241, 242, 244 of the wipes sheet 210. It has 520c. Since the linear convex portion 520 is a portion protruding from the outer peripheral surface of the shaping support 506 a, in addition to the illustrated mode, shaping is performed on the fiber web 501 by adopting various designs such as a character and a company logo. be able to.
  • the linear convex portion 520 is disposed on the entire outer periphery of the shaped support 506 a, and all wipes sheets 210 produced are also arranged such that a graphic portion having at least one independent and closed design is disposed. It has a pattern. Further, the height of the linear convex portion 520 is designed so that the line width and the height change in the extending direction depending on the design to be shaped.
  • the fiber moves to the periphery by the water flow and is not sucked by the suction pipe 521.
  • the fiber density is lower than that of the area.
  • the fibers moved from above the linear convex portion 520 are accumulated and the fiber density is relatively high.
  • the fiber density is higher than that of the thin portion 524, and the fiber density is lower than that of the first portion 531.
  • the pulp fibers located in the intermediate fiber layer of the fiber web 501 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 portions 524 located on the linear convex portions 520, the pulp fibers move so as to be blown to the periphery, and the mass of the pulp fibers is compared with the first and second portions 531 and 532. It is lower.
  • Such a water jet process can form a design pattern formed by entanglement of fibers on the fiber web 501, and the concave portion 522, the first portion 531 and the second portion 532 of the fiber web 501 are respectively wipes It corresponds to the concave line 218 (low density area 251), the high density area 252 and the medium density area 253 of the sheet 210.
  • the fibers are reoriented by the linear convex portions 520 disposed on the outer peripheral surface of the shaped support 506 a of the suction drum 506, and the concave portions 522 are formed on the second surface 501 b side of the fiber web 501. Since the thin portion 524 located in the linear protrusion 520 is not formed with a relatively large opening in the extending direction, the thin portion 524 is surrounded by the linear protrusion 520 during the manufacturing process. The part never falls off.
  • a spunlace manufacturing method by hydroentanglement has been exemplified, but air, water vapor, etc. besides water can be used as long as the concave line 218 can be formed by fiber entanglement by fluid treatment. It is also possible to employ a fluid-based manufacturing method.
  • the fiber non-woven fabric sheet according to the present invention is not limited to wipes, and sanitary napkins and disposable diapers It can also be used as a component of hygiene products such as breast milk pads. 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.
  • each component constituting the wipes sheet 210 according to the second invention in addition to the materials described herein, it is usually used in this type of field unless otherwise specified. And various known materials 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.
  • a wipes sheet (wipe sheet) 310 shown as an example of the fiber non-woven sheet of the third invention is a bulky and flexible sheet formed by interlacing constituent fibers, A first direction X and a second direction Y crossing each other (orthogonal), a thickness direction Z intersecting (orthogonal) in the first direction X and the second direction Y, and a first surface facing each other in the thickness direction Z And 311 and the second surface 312.
  • the first surface 311 is also referred to as a first wiping surface
  • the second surface 312 is also referred to as a second wiping surface.
  • the wipes sheet 310 is substantially rectangular, and is opposed to each other in the first direction X with the first end 310 a and the second end 310 b opposed to each other in the second direction Y and extending in the first direction X. It has an outer peripheral edge composed of a first side edge 310 c and a second side edge 310 d extending in the second direction Y.
  • the wipes sheet 310 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.
  • 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.
  • 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.
  • the wipes sheet 310 includes a first fiber layer 321 forming the first surface 311 side, a second fiber layer 322 forming the second surface 312 side, a first fiber layer 321 and a second fiber layer 321. And an intermediate fiber layer (third fiber layer) 323 positioned between the fiber layer 322 and the fiber layer 322.
  • the first fiber layer 321, the second fiber layer 322, and the intermediate fiber layer 323 have a multi-layered structure in which the fibers constituting them are three-dimensionally entangled with each other to form a composite.
  • a mixed fiber web of hydrophilic fibers and synthetic fibers can be used.
  • 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.
  • 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.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PE polyethylene
  • core-sheath type composite fibers using these fibers are used. be able to.
  • 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.
  • the first fiber layer 321 and the second fiber layer 322 preferably, fibers in which rayon fibers and PET (polyethylene terephthalate) fibers are mixed at a ratio (mass%) of 20:80 to 50:50. It is formed from the web.
  • 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 318 which forms the pattern area 340 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.
  • first fiber layer 321 and the second fiber layer 322 are mainly composed of hydrophobic fibers, they can be said to be hydrophobic layers, and the intermediate fiber layer 323 is mainly composed of hydrophilic fibers, so that they are hydrophilic. It can be said that it is a layer.
  • the intermediate fiber layer 323 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 323 is relatively high, and the visibility of the pattern area 340 can be enhanced. In addition to pulp fibers, manila hemp, mochi, three mochi, and linter pulp may be mixed.
  • the thickness dimension D301 of the wipes sheet 310 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 .
  • a thickness measurement device manufactured by PEACOCK, measurement surface ⁇ 44 mm, measurement pressure 3 g / cm 3 .
  • the fineness of rayon fibers and PET fibers used for the first fiber layer 321 and the second fiber layer 322 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 pulp fibers used for the intermediate fiber layer 323 is 1 to 10 mm, preferably 2 to 5 mm.
  • the wipes sheet 310 has a graphic area 340 formed of a concave line 318 which is concave toward the second surface 312 in the first surface 311.
  • the concave line 318 is formed by entanglement of constituent fibers, and has a bottom portion 318a with a bottom and both sides 318b surrounding the bottom portion 318a like a wall in the cross section of the concave line 318 shown in FIG. Have.
  • the wipes sheet 310 has a higher fiber density than the low density area 351 located at the bottom 318 a of the concave line 318 and the low density area 351 located at least on both sides of the low density area 351.
  • a high density area 352 and a medium density area 353 having a fiber density higher than the low density area 351 and a fiber density lower than the high density area 352 are provided. That is, the fiber density is the lowest at the bottom 318 a of the concave line 318, and the high density region 352 having the highest fiber density is located at least on both sides so as to surround the outer periphery of the bottom 318 a.
  • the wipes sheet 310 has such a fiber density difference, and the high density area 352 is positioned so as to surround the bottom 318 a of the concave line 318 consisting of the low density area 351, and a contrast due to the density difference is formed.
  • the dense region 352 is visually recognized in a dark color so as to border the outer peripheral edge of the concave line 318 (bottom portion 318a) due to the density of fibers, and the contour of the concave line 318 can be clearly recognized.
  • the high density region 352 has a protruding portion 354 protruding outward more than the middle density region 353 on the second surface 312 side.
  • the high density region 352 has a solid shape that protrudes outward on the second surface 312 side, the user viewed from the second surface 312 side where the concave line 318 is not formed. Even in this case, the contour of the concave line 318 can be grasped. Therefore, in combination with the contrast due to color density due to the density difference between the high density region 352 and the low density region 351, the contour of the concave line 318 can be seen more clearly not only from the first surface 311 but also from the second surface 312. It can be done.
  • pulp fibers having high water absorbability are positioned in the intermediate fiber layer 323 interposed between the first fiber layer 321 and the second fiber layer 322. 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 318a of the concave line 318 of the wipes sheet 310 that is, the content (% by weight) of pulp fibers located in the low density area 351 is the content (% by weight) of pulp fibers in the high density area 352 and the medium density area 353 It is smaller than).
  • the low density area 351 has a relatively low pulp fiber content, it can be said that the liquid retention is relatively low, but the bottom 318 a of the concave line 318 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 352 and 353 without requiring high liquid retention, and it is more difficult to break.
  • the amount of hydrophilic fibers in the high density region 352 is larger than the amount of hydrophilic fibers in the low density region 351, when used in a dry state, the moisture contained in the foreign matter is absorbed by the high density region 352 On the other hand, when used in a wet state, foreign matter can be wiped off by the water contained in the high density area 352.
  • a portion of the wipes sheet 310 is cut with a cutting tool such as a razor to make 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 310 was cut along a cut line extending in the first direction X orthogonal to the second direction Y (the machine direction MD in the manufacturing process) so as to intersect the concave line 318 of the pattern area 340.
  • 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 310 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 340 has a first symbol part 341 and a second symbol part 342 which have different designs.
  • the first symbol portion 341 has a substantially circular outline 341A formed from the concave line 318 and a substantially star-shaped pattern 341B surrounded by the outline 341A.
  • the second symbol portion 342 has a substantially oval outline line 342A, and a pattern 342B surrounded by the outline line 342A, in which a plurality of characters are arranged in a plurality of lines arranged in the second direction Y.
  • the first symbol part 341 and the second symbol part 342 are located side by side at the approximate center in the first direction X.
  • the symbol region 340 further includes a third symbol 343 which is a part of the first symbol 341 and the second symbol 342 and is a part thereof, and a heart-shaped relatively small fourth symbol 344.
  • the first symbol part 341 and the second symbol part 342 have a relatively large area on the first surface 311, and can exhibit a complete design by itself to impress the user. It can be said that it is the main symbol (main symbol).
  • the third pattern portion 343 is incomplete and does not exhibit any design property by itself, and the fourth pattern portion 344 is relatively small, and a design which impresses the user by itself
  • the third symbol part 343 and the fourth symbol part 344 can be said to be secondary symbols (sub-symbols) because they do not exhibit sex.
  • the third symbol portion 343 and the fourth symbol portion 344 are located outside so as to surround the first symbol portion 341 and the second symbol portion 342. Thereby, the design of the wipes sheet 310 can be improved.
  • the first symbol portion 341 and the second symbol portion 342 have independent and closed outlines 341A and 342A, and the outlines 341A and 342A are the outer peripheral edge of the wipes sheet 310 (first end edge 310a, second end edge 310b, an outer peripheral edge defined by the first side edge 310c and the second side edge 310d).
  • the outlines 341A and 342A of the first design portion 341 and the second design portion 342 are independent extends to the outer peripheral edge of the fabric 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 310 and has completely independent design. Therefore, for example, as in the case of the third design portion 343, the outer contour 343A does not reach the outer periphery of the sheet and can not grasp the overall design, which does not correspond to an independent outer contour.
  • the outlines 341A and 342A of the first symbol part 341 and the second symbol part 342 are closed, the outlines 341A and 342A extend continuously or discontinuously so as to surround the symbols 341B and 342B.
  • Means to The outlines 341A and 342A may have various known shapes such as a circle, an ellipse, a triangle, and a polygon, as long as the outlines 341A and 342A have an aspect surrounding the symbols 341B and 342B.
  • the design 341B of the first design 341 and the design 342B of the second design 342 have a design that will 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 344 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 simulating a bubble, etc. It may be.
  • the first symbol portion 341 and the second symbol portion 342 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 using the wipes sheet 310, with the first surface 311 as a wiping surface, the dirt attached to the surface to be wiped such as a body or a table is an edge on the first surface 311 side of the both sides 318b of the concave line 318 Edges 318c can be used to effectively wipe away dirt. For example, as shown in FIG.
  • the high density region 352 has less shrinkage in the thickness direction, while the middle density region 353 outside the high density region 352 has a thickness
  • the contraction of the direction is large. Therefore, the recess 348 is formed on the first surface 311 of the medium density area 353 located outside the high density area 352 at the time of wiping. Therefore, when the foreign matter is wiped, the foreign matter can be stored outside the high density area 352 located on both sides of the low density area 351, and the foreign matter can be prevented from entering the inside of the concave line 318, whereby after the wiping. Also in the above, it is possible to suppress the decrease in the clarity of the concave line.
  • the first symbol 341 and the second symbol 342 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 310. On the other hand, since the fourth symbol 344 has a relatively small area, it does not function as a main wiping area.
  • 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.
  • the designability is further improved as compared to the printed pattern, and the raised outer peripheral edge can wipe off the dirt.
  • the design itself 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.
  • 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.
  • it 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.
  • 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.
  • the embossed portion may hit the skin and may cause discomfort and irritation, and may be easily broken.
  • the whole nonwoven fabric is formed as compared to the case where they are formed by heat embossing. As soft as it has good feel, it can maintain the flexibility unique to spunlace nonwoven fabrics. Also, since the first symbol part 341 and the second symbol part 342 have independent outlines 341A, 342A, a design having a completely independent aspect can be adopted, and a mere 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.
  • the pattern area 340 When the pattern area 340 itself is raised, light may be scattered and its outline may be blurred. However, since it is formed by the concave line 318, the outline is made clearer to the user. Can be made to understand. Further, at the time of wiping, since the portions other than the concave line 318 are in direct sliding contact with the surface to be wiped, the shape of the concave line 318 is not broken by friction and the pattern area 340 is not largely deformed.
  • the outlines 341A and 342A are closed, and the symbols 341B and 342B are arranged so as to be surrounded by the outlines 341A and 342A. Even when the user pulls or loosens the wipes sheet 310 to deform the wipes sheet 310 because the patterns 341B and 342B are surrounded by the outlines 341A and 342A, the outlines 341A and 342A are the starting point. As the shape is deformed, the patterns 341B and 342B can maintain their shape.
  • the first symbol 341 and the second symbol 342 are different in design from each other, and the total area of the concave line 318 is different from each other. As a result, since the symbol parts 341 and 342 having different storage capacities for foreign matter exist, the user can select the symbol parts 341 and 342 according to the amount of contamination.
  • a third symbol 343 and a fourth symbol 344 are located around the first symbol 341 and the second symbol 342, which are the main wiping areas. Therefore, when the wipes sheet 310 is squeezed, the third symbol portion 343 and the fourth symbol portion 344 are deformed as a starting point, and the first symbol portion 341 and the second symbol portion 342 located at the center are deformed. It can be said that it can be suppressed.
  • the 1st pattern part 341 and the 2nd pattern part 342 have the curved concave line 318 from a viewpoint of wiping off property and an aesthetics.
  • the outlines 341A and 342A are curved, and the patterns 341B and 342B also have curved portions.
  • the first and second pattern portions 341 and 342 have a curved concave line 318, so that they can give a soft and good impression on the skin and can be deformed according to the shape of the surface to be wiped.
  • the pattern portions 341 and 342 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 311 is a wiping surface by positioning the symbol area 340 including the concave line 318 on the first surface 311 side.
  • the first symbol 341 B and the second symbol 342 B are symbols and characters such as notes, and the description is correct when viewed from the first surface 311, and the description is incorrect when viewed from the second surface 312.
  • the symbol area 340 also has a function of guiding the user to use the first surface 311 as a wiping surface.
  • the first symbol 341 and the second symbol 342 in the symbol area 340 can function as a wiping region, but the third symbol 343 and the fourth symbol 344 are also formed from the concave line 318 It has a certain degree of wiping properties. Therefore, the user can appropriately select and use one of the first to fourth symbol parts 341 to 344 in accordance with the size of the stain at the time of wiping.
  • the concave lines 318 (first line (outside symbol)) forming the outlines 341A, 342A are the concave lines 318 (second line) forming the symbols 341B, 342B. (Inside pattern)) It is wider as a whole. That is, the width dimension in the extending direction of the first line forming the outlines 341A, 342A is larger than the width dimension in the extending direction of the second line forming the patterns 341B, 342B. Thereby, the design of the wipes sheet 310 can be improved.
  • the relatively wide outlines 341A, 342A allow the user's attention to be drawn to draw out the figures 341B, 342B surrounded by the user.
  • At least one of the plurality of symbol portions 341 to 344 is present in the first direction X at an arbitrarily selected position 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 341 to 344 do not exist, the portion where any of the symbol portions 341 to 344 exist Therefore, if there is dirt adhering, it is possible to easily change the place where the finger is in contact. In the wipes sheet 310, at least one of the plurality of symbol portions 341 to 344 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 340 has a plurality of first to fourth pattern parts 341 to 344 different in design, thereby dividing the dimensions of the wipes sheet 310 in the first direction X into two equal parts, and 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 aware of the longitudinal direction and the width direction of the wipes sheet 310. Thus, as long as the vertical and horizontal directions of the wipes sheet 310 can be recognized, the symbol area 340 may be asymmetric with respect to either the first virtual line P or the second virtual line Q.
  • the second direction Y corresponds to the machine direction in the manufacturing process
  • the first direction X corresponds to the direction intersecting the machine direction
  • the constituent fibers are mainly oriented in the second direction Y.
  • the wiping direction is a direction in which the fibers are oriented
  • the sheet strength is along the second direction Y higher than the first direction X
  • the design region 340 asymmetrically, the second direction Y is the wiping direction It can be recognized as (vertical direction).
  • the design element as in the case of the pattern 342B of the second pattern portion 342
  • the design element so that the second direction Y is in the vertical direction, it is possible to guide the user to wipe in the second direction Y.
  • the second symbol 342 is asymmetric with respect to an imaginary line (not shown) that divides the dimension in the first direction X into two equal parts.
  • the concave line 318 forming the symbol area 340 has a second portion 382 extending in the first direction X and a first portion 381 extending in the second direction Y.
  • the fiber orientation in the second portion 382 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 318 is not broken even after the wiping.
  • the number of fibers oriented in the second direction Y is smaller than that in the second portion 382 per unit area.
  • the second direction Y is the wiping direction
  • the tensile strength of the first portion 381 is smaller than the tensile strength of the second portion 382.
  • the concave shape of the concave line 318 is slightly broken after wiping.
  • the first symbol part 341 and the second symbol part 342 are different in the change mode after wiping by the second portion 382 extending in the first direction X and the first portion 381 extending in the second direction Y.
  • the first part 381 and the second part 382 are connected to form the first to fourth symbol parts 341 to 344, but the first part 381 and the second part 382 are shown. And may not be connected.
  • the fiber orientation is the direction in which the fibers are flowing (the direction in which the fibers are elongated) in plan view of the wipes sheet 310, and the “fiber orientation of the second portion 382 is the second direction”.
  • 50% or more is ⁇ 45 ° to +45 with respect to the second direction Y. Including those having fiber orientation in the range of °.
  • 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.
  • fiber orientation from the tensile strength ratio (first direction X / second direction Y) of the second portion 382 in the first direction X and the second direction Y using a tensile tester described later May be measured.
  • the first part 381 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.
  • the first portion 381 is a portion that is convex in the first direction X
  • the second portion 382 is a portion convexly bent in the second direction Y.
  • 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.
  • the shape is unlikely to collapse and the width tends to be narrow.
  • the first direction X is the wiping direction
  • the width dimension of the first portion 381 Spreads.
  • 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.
  • the patterns 341B and 342B of the first and second pattern portions 341 and 342 an idea combination of figure design and characters may be adopted.
  • 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.
  • 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.
  • the symbol area 340 can also be provided with a function as one of the tools capable of creating a good conversation between the parent and child through the wipes sheet 310.
  • the wipes sheet 310 has a design with high visibility and uniqueness, so unlike the conventional wipes sheet, the high-quality handkerchief of which the pattern 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.
  • a logo design of a company is adopted as the design area 340, 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 310 has both the basic functions as wipes and the emotional value that causes the consumer to buy.
  • the concave part of the low density area 351 and the high density area 352 located on both sides thereof are present in the part where the concave line 318 exists. Exists. For this reason, when wiping off on the first surface 311 side, it is possible to wipe off while accumulating foreign matter on the outside of the high density region 352.
  • the portion on the opposite side excluding the portion where the concave line 318 exists on the first surface 311 side is flat, while on the opposite side of the portion where the concave line 318 exists on the first surface 311 side
  • Two protruding portions 354 are present along the edge of the concave line 318 and extend along the extending direction of the concave line 318. For this reason, when wiping off on the second surface 312 side, wiping can be performed while scraping foreign substances by the projecting portion 354.
  • the wipes sheet 310 has the first surface 311 and the second surface 312 which have different wiping functions, and therefore can cope with various types of dirt (foreign matter).
  • the second wiping surface which is the second wiping surface
  • the second wiping surface may be folded in two and used.
  • the second surfaces 312 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 .
  • the protruding portions 354 of the high density area 352 located on the second surface 312 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.
  • a plurality of symbol parts 341 and 342 having independent and closed outlines 341A and 342A are present in one wipe sheet 310, but at least in consideration of design and wiping properties, at least It is only necessary that one symbol 341, 342 be present.
  • the design area 340 of a different design for each wipes sheet 310 when the user takes out from the container in which a plurality of wipes sheets 310 are stored, ones having different designs can be drawn out one after another. Therefore, the user can pop up while having fun.
  • the user grasps and pulls both sides in the first direction X with hands 308 and 309, respectively, thereby disengaging the fibers from one another.
  • the horizontal width of 310 may be expanded and used.
  • the sheet is pulled so as to stretch out to check the sheet strength and expand the sheet area May be used.
  • the wipes sheet 310 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) W301 in the first direction X is increased 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.
  • the wipes sheet 310 when the wipes sheet 310 is pulled in the first direction X, entanglement of fibers is released not only in the pattern area 340 but also in other areas, and the wipes sheet 310 as a whole is
  • the dimension (width dimension) W301 in the first direction X is increased.
  • the width dimension W302 of the wipes sheet 310 is 1.1 to 1.5 times the width dimension W301 before being pulled. Have.
  • the concave line 318 forming the pattern area 340 is formed by fiber entanglement and is soft and easy to deform, the tensile forces F301 and F302 act to cause the fiber entanglement.
  • the line width in the first direction X is expanded in the entire concave line 318, and the outer dimensions of the first to fourth designs 341 to 344 increase.
  • the width dimension W304 of the first portion 381 in the state where the wipes sheet 310 is stretched by 30% in the first direction X in the wet state is the width dimension W303 of the first portion 381 before being pulled. It is 1.5 to 2.5 times.
  • the width dimension W303 of the concave line 318 is expanded to become the width dimension W304 and the dimension is increased, so that the wiping area is increased and the wiping performance is further improved.
  • the concave line is shaped by embossing
  • the tensile force F301 or F302 acts by curing the fiber and partially forming a film
  • the thin bottom portion 318a May be broken without being stretched, but since the concave line 318 is shaped by fiber entanglement and has extensibility, the fiber entanglement is broken at the bottom portion 318a when pulled in the first direction X.
  • the width dimension W303 is gradually expanded, and a part of the bottom portion 318a can be suppressed from being broken.
  • the “pulling force in the first direction X” is, in addition to the forces F301 and F302 generated by the user holding the both sides of the wipes sheet 310 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 310 is fixed, the other side may be pulled in a direction away from the one side.
  • the width dimension W303 of the concave line 318 is expanded, so that the outlines of the first to fourth design parts 341 to 344 appear more clearly and the visibility is improved.
  • the width W303 of the concave line 318 is relatively small, and the overall appearance is narrow if the external appearance is difficult to see
  • the width dimension W 304 is obtained by pulling the wipes sheet 310 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.
  • the wipes sheet 310 is used.
  • the width dimension in the first direction X becomes larger than the width dimension in the second direction Y of the second portion 382.
  • the outlines of the respective symbol portions 341 to 344 become clearer, and the first portion 381 is maintained in its shape. The balance of the overall shape of the 344 is not greatly disturbed.
  • the designs 341B and 342B 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.
  • the pulp fibers 328 located in the intermediate fiber layer 323 are exposed to the outside of the hydrophobic first surface 311. Absent.
  • the pulp fibers 328 constitute an absorption layer that absorbs and holds a drug, and thus, by surrounding the hydrophobic layer and not exposing to the outside, the outside air can be obtained. It is not exposed and can prevent drying and suppress the volatilization of the drug.
  • the fibers constituting the bottom portion 318 a of the concave line 318 are untwisted to form the intermediate fiber layer 323.
  • a portion of the pulp fibers 328 located in the first fiber layer 321 passes between the fiber gaps of the fibers constituting the first fiber layer 321 and is exposed to the outside from the first surface 311.
  • the user stretches the wipes sheet 310 in the first direction X to widen the concave lines 318 and expose the pulp fibers 328 to the outside, so that the bottom 318 a is covered.
  • it can be hygienically wiped with the agent absorbed by the pulp fibers 328.
  • the surface of the hydrophobic first surface 311 is exposed to the pulp fiber and other hydrophilic fibers on the surface of the first surface 311, and the first surface 311 is hydrophobic.
  • a water repellent agent such as silicon may be applied to the surface of the first fiber layer 321 forming the first surface 311 to prevent the pulp fibers 328 from drying before use.
  • the smoothness is improved, so the next wipes sheet 310 is pulled out together when popping up the wipes sheet 310 in a wet state from the storage container ( Can be suppressed.
  • the concave lines 318 are formed on the first surface 311 of the wipes sheet 310, the contact area of the facing surfaces of the wipes sheets 310 in contact with each other in the laminated state is reduced, thereby further suppressing blurring. It is easy to pull out.
  • the wipes sheet 310 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 318a may break, or When pulled in one direction X, there is a possibility that the sheet shape may collapse or a part may be broken because the bottom portion 318a is excessively stretched.
  • the tensile strength in the first direction X exceeds 1.0 N / 25 mm, the tensile strength becomes too high, and the force by which the user pulls lightly before use makes the bottom 318 a difficult to stretch and the concave line 318
  • the width dimension W304 does not expand.
  • the maximum elongation when the wipes sheet 310 is pulled in the first direction X is 2.0 to 3.0 times
  • the maximum elongation when the wipes sheet 310 is pulled in the second direction Y is 1. It is 2 to 1.8 times.
  • the maximum elongation of the wipes sheet 310 is 1.0 times the size of the width dimension W301 before measurement, and for example, the width dimension W301 of the wipes sheet 310 is 100 mm.
  • the maximum elongation is 2.0 times.
  • the test is performed so that the first direction X is in the vertical direction between the fixed chuck 391 and the movable chuck 392
  • the piece 393 was placed, and the maximum tensile strength and the maximum elongation were measured under the conditions of a chuck distance L301 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 393 such that the second direction Y was in the vertical direction (vertical direction) of the tester.
  • the movable chuck 392 was moved in a direction away from the fixed chuck 391, and the maximum tensile strength (N / 25 mm) was determined when the distance L301 between chucks was 105 mm (elongation 5%). Further, the tensile strength at the time when the test piece was broken by increasing the distance L301 between chucks was taken as the maximum tensile strength, and the elongation was taken as the maximum elongation (fold). Furthermore, when the distance L301 between chucks is 130 mm (elongation 30%), the separation distance R302 of the marks T301 and T302 of the first part 381 is measured with a ruler, and the separation distance ratio (R302 / R301) 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.
  • the wipes sheet 310 according to the present invention is a manufacturing 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.
  • An apparatus for manufacturing the wipes sheet 310 and part of the manufacturing process will be described below.
  • 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.
  • the fiber web is formed by the air laid method corresponding to the intermediate fiber layer 323 between the fiber aggregates formed by the card method corresponding to the first and second fiber layers 321 and 322 of the wipes sheet 310. 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 fiber entanglement and concave portions corresponding to the concave lines 318 forming the graphic area 340.
  • the fiber gap is filled with water and the fiber density is increased.
  • the fiber 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.
  • water may be sprayed by a spray without requiring water pressure to move the fibers.
  • FIG. 27 is a perspective view of a water jet process 600 for forming in the fiber web 601 a recessed portion 622 corresponding to the recessed line 318 of the graphic region 340.
  • the water jet process 600 includes a suction drum 606 for holding the fiber web transported in the machine direction MD on the outer circumferential surface, and a nozzle plate 607 for jetting water to the fiber web located on the outer circumferential surface of the suction drum 606.
  • the fiber web 601 has a first surface 601 a facing the nozzle plate 607 on the outer peripheral surface of the suction drum 606 and a second surface 601 b facing the outer peripheral surface of the suction drum 606 located on the opposite side.
  • the suction drum 606 includes a shaped support 606 a having linear protrusions 620.
  • the outer peripheral surface of the shaping support 606a is in the form of a mesh having a plurality of suction pipes 621, and while rotating the shaping support 606a around the axis K601, the fiber web 601 is attracted to the shaping support 606a and the outer periphery is drawn. While being held on the surface, it is transported to a dehydrator (not shown) via a downstream transport means (not shown).
  • the nozzle plate 607 jets water toward the first surface 601 a side of the fiber web 601 held on the outer peripheral surface of the suction drum 606 to intertwine fibers and is located on the outer peripheral surface of the shaping support 606 a
  • a concavo-convex pattern is provided on the second surface 601b side of the fiber web 601.
  • the linear convex portion 620 is formed integrally or separately with the outer peripheral surface of the shaped support 606 a.
  • the fiber web 601 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
  • the wipes sheet 310 used in the above it is conveyed to the liquid supply means for impregnating the liquid containing medicines and perfumes with or without a dryer.
  • the fiber webs After the fiber webs have been subjected to these steps, they are cut into appropriate sizes by a cutting means.
  • a part of the heat fusible fibers constituting the fiber web 601 is heat-fused to improve the sheet strength.
  • a plurality of nozzles arranged in the cross direction CD jets water to the first surface 601a of the fiber web 601 held on the outer peripheral surface of the shaped support 606a of the suction drum 606.
  • the fiber web 601 is preliminarily entangled with fibers in a suction drum (not shown) located upstream of the suction drum 606 so that the fibers are entangled by a weak force so that the entire surface is flat.
  • the fiber web 601 is pressed against the linear convex portion 620 located on the outer peripheral surface of the shaping support 606 a by the water flow jetted from the nozzle plate 607 while being sucked from the pipe 621.
  • FIG. 28 (a) is an enlarged view of the fiber web 601 on the linear convex portion 620 before the water flow is jetted in the suction drum 606, and FIG. 28 (b) is after the fluid is jetted in the suction drum Of the fiber web 601 on the linear convex part 620 of FIG.
  • the linear convex portions 620 have first, second and third linear convex portions 620a, 620b, having different designs corresponding to the first, second and fourth design portions 341, 342, 344 of the wipes sheet 310. It has 620c. Since the linear convex portion 620 is a portion protruding from the outer peripheral surface of the shaping support 606 a, various shapes such as a character and a company logo are adopted for shaping on the fiber web 601 in addition to the illustrated mode. be able to.
  • the linear convex portion 620 is disposed on the entire outer periphery of the shaped support 606 a, and all wipes sheets 310 manufactured are also arranged such that a graphic portion having at least one independent and closed design is disposed. It has a pattern.
  • the height of the linear convex portion 620 is designed to change the line width and height in the extending direction according to the shaping design.
  • the fibers move to the periphery by the water flow and the suction pipe 621 does not suck the fiber.
  • the fiber density is lower than that of the area.
  • the fibers moved from above the linear convex portion 620 are accumulated and the fiber density is relatively high.
  • the second portion 632 extending further outward from the first portion 631 has a higher fiber density than the thin portion 624 and a lower fiber density than the first portion 631.
  • the pulp fibers located in the intermediate fiber layer of the fiber web 601 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 624 located on the linear convex portion 620, 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 631, 632 It is lower.
  • the water jet process can form a design pattern formed by fiber entanglement on the fiber web 601, and the concave portion 622, the first portion 631 and the second portion 632 of the fiber web 601 are respectively wipes It corresponds to the concave line 318 (low density area 351), the high density area 352 and the medium density area 353 of the sheet 310.
  • the fibers are reoriented by the linear convex portions 620 disposed on the outer peripheral surface of the shaped support 606 a of the suction drum 606, and the concave portions 622 are formed on the second surface 601 b side of the fiber web 601.
  • relatively thin apertures are not formed in the thin portion 624 located in the linear convex portion 620 in the extending direction, and the thin portion 624 is surrounded by the linear convex portion 620 in the manufacturing process. The part never falls off.
  • the spunlace manufacturing method by hydroentanglement was illustrated, but air, water vapor, etc. besides water can be used as long as the concave line 318 can be formed by fiber interlacing by fluid treatment. It is also possible to employ a fluid-based manufacturing method.
  • the fiber non-woven fabric sheet according to the present invention is not limited to wipes, and sanitary napkins and disposable diapers It can also be used as a component of hygiene products such as breast milk pads.
  • the first symbol part 341 and the second symbol part 342 of the symbol region 340 have independent and closed outlines 341A, 342A formed by the concave lines 318 due to fiber interlacing, the design is totally flexible as a whole. It can be suitably used as a sheet material in contact with the skin of hygiene products.
  • the components constituting the wipes sheet 310 according to the third invention are generally used in this type of field, in addition to the materials described herein, unless otherwise specified. And various known materials 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
  • Fiber non-woven sheet (wipe sheet) 111 first surface 112 second surface 118 concave line 140 symbol area 141 first symbol part (symbol part) 142 second symbol part (symbol part) 141A, 142A Outline 141B, 142B Design 161 Wide portion 162 Narrow portion 170 Slit 181 First portion 182 Second portion 210 Fiber non-woven sheet (Wipes sheet) 211 first surface 212 second surface 218 concave line 240 symbol region 241 first symbol (symbol) 242 2nd symbol part (symbol part) 241A, 242A Outline 241B, 242B Design 261 Wide portion 262 Narrow portion 270 Slit 281 First portion 282 Second portion 310 Fiber non-woven sheet (Wipes sheet) 311 first surface 312 second surface 318 concave line 321 first fiber layer 322 second fiber layer 323 intermediate fiber layer 351 low density region 352 high density region 354 protruding portion 381 first portion 382 second portion P first virtual

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Abstract

L'invention fournit une feuille de tissu non-tissé en fibres qui présente un toucher satisfaisant, et qui comporte des parties motif formées par des lignes en retrait s'étirant facilement et permettant de se déformer aisément. La feuille de tissu non-tissé en fibres (110) possède les parties motifs (141, 142) formées par des lignes en retrait (118) formant un retrait sur un premier plan (111) du côté d'un second plan (112). Les lignes en retrait (118) sont formées par entrelacement de fibres, et la dimension dans une première direction (X) de ces lignes en retrait (118) augmente par désentrelacement de leurs fibres, lors d'une traction d'au moins 5% dans la première direction (X).
PCT/JP2018/047359 2017-12-28 2018-12-21 Feuille de tissu non-tissé en fibres WO2019131551A1 (fr)

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CN201880073091.8A CN111328355B (zh) 2017-12-28 2018-12-21 纤维无纺布片

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JP2017-254747 2017-12-28
JP2017-254750 2017-12-28
JP2017254747A JP6956629B2 (ja) 2017-12-28 2017-12-28 繊維不織布シート
JP2017254750A JP7065607B2 (ja) 2017-12-28 2017-12-28 繊維不織布シート
JP2017254746A JP7065604B2 (ja) 2017-12-28 2017-12-28 繊維不織布シート
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JPH04327255A (ja) * 1991-04-26 1992-11-16 Nippon Filcon Co Ltd 突起を設けた不織布製造用ベルト及び模様を形成した不織布の製造方法
JPH0931823A (ja) * 1995-07-19 1997-02-04 Toyobo Co Ltd 積層不織布
JP2006320728A (ja) * 1999-12-10 2006-11-30 Procter & Gamble Co 巨視的三次元孔なしクリーニングシート、並びにそれを用いたクリーニング用具、クリーニング方法及び製造物品
JP2002069814A (ja) * 2000-08-30 2002-03-08 Daiwabo Co Ltd 刺繍入り不織布形成用支持体及びそれを用いた刺繍模様付き不織布の製造方法
WO2013179747A1 (fr) * 2012-05-28 2013-12-05 花王株式会社 Feuille nettoyante et procédé de fabrication s'y rapportant
JP2014113409A (ja) * 2012-12-12 2014-06-26 Soft99 Corporation ウェットシート
JP2017031518A (ja) * 2015-07-30 2017-02-09 ユニチカ株式会社 水流交絡不織布の製造方法

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CN111328355A (zh) 2020-06-23
CN111328355B (zh) 2022-09-27
KR102481089B1 (ko) 2022-12-26

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