CN104334784A - Non-Woven Fabric - Google Patents

Non-Woven Fabric Download PDF

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Publication number
CN104334784A
CN104334784A CN201380026230.9A CN201380026230A CN104334784A CN 104334784 A CN104334784 A CN 104334784A CN 201380026230 A CN201380026230 A CN 201380026230A CN 104334784 A CN104334784 A CN 104334784A
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CN
China
Prior art keywords
nonwoven fabric
fiber
free end
fibers
fluffing
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Granted
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CN201380026230.9A
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Chinese (zh)
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CN104334784B (en
Inventor
凑崎真行
种市祥一
衣笠由彦
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Kao Corp
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Kao Corp
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Publication of CN104334784B publication Critical patent/CN104334784B/en
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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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C11/00—Teasing, napping or otherwise roughening or raising pile of textile fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • D06C3/06—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by rotary disc, roller, or like apparatus

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

This non-woven fabric (1) is a hydrophilic non-woven fabric provided with a fiber aggregate (11) formed by fastening long fibers using a heat sealing unit (3). In the non-woven fabric (1), some of the long fibers (2) are fractured, and fibers (20) are provided, one end (20a) of each fiber (20) being fastened using the heat sealing unit (3), and the other end of each fiber (20) serving as a free end (20b) that stands up apart from the fiber aggregate. The hydrophilic degree of the fibers (20) having free ends (20b) is lower than the hydrophilic degree of the fibers constituting the fiber aggregate (11).

Description

Nonwoven fabric
Technical field
The present invention relates to and comprise long stapled nonwoven fabric.
Background technology
Such as, in the absorbent commodities such as disposable diaper, high and processing adaptability is excellent and the reason of economy for fracture strength, mostly use the nonwoven fabric (hot-wind nonwoven cloth, fabric hot rolled nonwoven fabrics) of spun-bonded nonwoven fabric, low weight per unit area.But spun-bonded nonwoven fabrics etc. are from the viewpoint of its autofrettage, and the deficiency such as soft sense on the whole, is difficult to improve skin sense of touch.
Proposed a kind of nonwoven fabric before the applicant, it possesses long stapled part fracture, only has an end to utilize heat-fused portion to be fixed, and the fiber that the free end of side, the other end is thicker (with reference to patent document 1).Nonwoven fabric according to patent document 1, although fracture strength is high, still has soft sense on the whole, and resiliency improves, and skin sense of touch improves.
As technology different with it, such as, in patent document 2, describe a kind of absorbent commodity possessing following liquid permeability surface patch, described liquid permeability surface patch is the density of the formation fiber not changing liquid permeability surface patch, and to the rear side coating surfactant of surface patch, thus rear side is imparted to the liquid permeability surface patch of the high water-wetness in specific surface side.
Prior art document
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2012-92475 publication
Patent document 2: Japanese Unexamined Patent Publication 2005-87659 publication
Summary of the invention
But, in patent document 1, when the nonwoven fabric described in patent document 1 is used for the surface patch of the absorbent commodities such as such as disposable diaper, without any be transferred to rapidly about the body fluid making this surface patch absorb absorb side viewpoint, not easily passed through this surface patch by the body fluid that absorber was once absorbing and the record of viewpoint that refluxes.It should be noted that, make absorbed body fluid be transferred to rapidly the liquid permeability absorbing side raising, with the liquid not easily reflow relation being in balance that once absorbed body fluid is not easily refluxed, be difficult to take into account.Like this, the not easily reflow of the raising of the liquid permeability taking into account liquid and liquid is more needed.
In addition, in patent document 2, without any the record about fibre pick, the liquid permeability surface patch described in patent document 2 is the sheet material of overall resiliency difference.In addition, for the liquid permeability surface patch described in patent document 2, not physically change the density forming fiber, and be just only coated with surfactant, be therefore difficult to improve the liquid permeability being transferred to by body fluid and absorbing side.
Therefore, problem of the present invention is to provide that resiliency improves, the liquid permeability of liquid improves and the nonwoven fabric that liquid is not easily refluxed.
The present invention relates to possess utilizes heat-fused portion to be fixed by long fiber and the hydrophilic non-woven of the aggregate of fibers obtained.For described nonwoven fabric, described long stapled part fracture, an end utilizes described heat-fused portion to be fixed, and the other end becomes free end and leaves from described aggregate of fibers and erect, and described nonwoven fabric possesses the fiber with this free end.The water-wetness with the fiber of described free end is lower than the water-wetness of the fiber forming described aggregate of fibers.
Accompanying drawing explanation
Fig. 1 is the stereogram of the nonwoven fabric represented as present embodiment of the present invention.
Fig. 2 is the stereogram representing the fiber that free end that the nonwoven fabric shown in Fig. 1 has is thicker.
Fig. 3 is the schematic diagram of the method representing the fiber footpath, top measuring the nonwoven fabric shown in Fig. 1.
Fig. 4 is the schematic diagram of the method for the radical of the fiber representing the fluffing measuring the nonwoven fabric shown in Fig. 1.
Fig. 5 is the schematic diagram of the suitable manufacturing installation of the manufacture method represented for nonwoven fabric of the present invention.
Fig. 6 is the schematic diagram representing the local elongation processing department that the manufacturing installation shown in Fig. 5 possesses.
Fig. 7 is the significant points amplification profile of the local elongation processing department shown in Fig. 6.
Fig. 8 is the schematic diagram representing the fluffing processing department that the manufacturing installation shown in Fig. 5 possesses.
Fig. 9 is the figure of the example of occupation mode for illustration of nonwoven fabric of the present invention, and it represents to be launched by pull-on disposable diaper and the expansion top view of the state that makes it extend.
Figure 10 is the I-I line profile of Fig. 9.
Detailed description of the invention
Below, according to its preferred embodiment, limit reference Fig. 1 ~ Fig. 4, while illustrate nonwoven fabric of the present invention.
As shown in Figure 1, the nonwoven fabric 1 of present embodiment (is also simply called " nonwoven fabric 1 " below.) utilize heat-fused portion 3 that long fiber 2 is fixing and the hydrophilic non-woven of aggregate of fibers 11 that obtains for possessing.It is (following that nonwoven fabric 1 possesses fiber 20, fiber 20 also referred to as having free end 20b), wherein, the part fracture of long fiber 2, one end 20a utilizes heat-fused portion 3 to be fixed, and the other end becomes free end 20b and leaves aggregate of fibers 11 and erect.For nonwoven fabric 1, as shown in Figure 1, using the long side direction of nonwoven fabric 1 as Y-direction, using the width of nonwoven fabric 1 as X-direction, be below described.It should be noted that, for nonwoven fabric 1, according to the differently-oriented directivity forming fiber, MD direction along the differently-oriented directivity of fiber is consistent with long side direction (Y-direction), the CD direction orthogonal with it and width (X-direction) consistent, in the following description, Y-direction and MD direction represent equidirectional, and X-direction and CD direction represent equidirectional.In addition, nonwoven fabric 1 has the aggregate of fibers 11 be made up of following fiber: have the fiber 20 of the free end 20b erected from aggregate of fibers 11, erect the fiber do not fluffed beyond fibrae circulares 23 (fiber 20, fiber 23 being referred to as " fiber of fluffing ") circlewise and " fiber of fluffing " each other in aftermentioned heat-fused portion 3,3.In addition, aggregate of fibers 11 by the fiber 20 except having the free end 20b erected from aggregate of fibers 11, except aftermentioned heat-fused portion 3,3 erects circlewise fibrae circulares 23 each other, the fiber that do not fluff forms.
For the nonwoven fabric 1 of present embodiment, specifically, nonwoven fabric 1 is formed based on the hydrophilic non-woven 10 that obtains to utilize heat-fused portion 3 to be fixed by the net be made up of long fiber 2 discontinuously.Below, the nonwoven fabric (raw material nonwoven fabric) 10 on basis is it can be used as to be described.Raw material nonwoven fabric 10 is the nonwoven fabric before a part for long fiber 2 is ruptured.Herein, " long fiber " has the long fiber of the fiber of more than 30mm, as raw material nonwoven fabric 10, if the so-called continuous fiber of long more than the 150mm of fiber, then can obtain the high nonwoven fabric of fracture strength 1 on preferably.As such raw material nonwoven fabric 10, the stacked nonwoven fabric of the layer of spun-bonded nonwoven fabric or spun-bonded type and the layer of melt-blown can be enumerated, utilize the fabric hot rolled nonwoven fabrics etc. of combing method.As stacked nonwoven fabric, such as, can enumerate the stacked nonwoven fabric of spun-bonded type-spun-bonded type, spun-bonded type-stacked nonwoven fabric of spun-bonded type-spun-bonded type, spun-bonded type-stacked nonwoven fabric of melt-blown-spun-bonded type, spun-bonded type-spun-bonded type-melt-blown-stacked nonwoven fabric of spun-bonded type etc.
Hydrophilic material nonwoven fabric 10 can by the formation fiber of this nonwoven fabric surface attachment hydrophilic agent or in this formation fiber, be mixed into hydrophilic agent and carry out hydrophilicity-imparting treatment and obtain.That is, hydrophilicity-imparting treatment carried out to hydrophobicity long fiber 2 and form hydrophilic material nonwoven fabric 10.
As hydrophilic agent, anionic property, cationic, two ionic and nonionic surfactants can be enumerated, the anion surfactants such as carboxylate series anion surfactant, sulfonate series anion surfactant, sulfuric acid series anion surfactant, phosphate ester salt series anion surfactant (particularly alkyl phosphate salt) can be used, sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monoleate, glyceryl monostearate, glycerin mono-fatty acid ester, the polyalcohol mono fatty acid esters such as propylene glycol monostearate, oleamide, stearic amide, the fatty acid amides such as erucyl amide, N-(3-oil oxygen base-2-hydroxypropyl) diethanol amine, Crodaret, polyoxyethylene sorbitol beeswax, polyoxyethylene sorbitan sesquistearate, Aceonon 300 MO, polyoxyethylene sorbitan sesquistearate, TMGO 5, polyoxyl 40 stearate, Vinlub 73, Aceonon 300 MO, polyoxyethylene cetyl base ether, the nonionic system surfactants such as polyoxyethylene lauryl ether, the cationic surfactants such as quaternary ammonium salt, amine salt or amine, the zwitterionic surfactants etc. such as the aliphatic derivatives of the secondary amine containing carboxyl, sulphonic acid ester, sulfuric ester or the aliphatic derivatives of tertiary amine or hetero ring type secondary amine or tertiary amine.As long as the combination of these preferred surfactants and preferred surfactant comprises above-mentioned surfactant, other surfactant etc. can also be comprised.
From the view point of taking into account transparent liquid time and liquid backflow amount, the amount of the hydrophilic agent in nonwoven fabric 1 is preferably more than 0.1 % by weight relative to the weight of this nonwoven fabric 1 and less than 20 % by weight, and more preferably more than 0.3 % by weight and less than 5 % by weight.
In raw material nonwoven fabric 10, except hydrophilic agent, the additives such as fibre staining agent, antistatic property agent, softener can be given.Particularly in raw material nonwoven fabric 10, if be mixed into softener or coating softener, then the effect that skin sense of touch when contacting skin improves is more effective.As softener, such as wax emulsion, response type softener, silicone compound, surfactant etc. can be used.In addition, as required, known medicament can be added as secondary additive (a small amount of composition) in softener.
By comprising softener, thus the skin sense of touch of nonwoven fabric 1 formed based on nonwoven fabric 10 is improved, villus shedding tails off, and the skin on surface rubs also step-down, and fracture strength also uprises.
For softener, using its with the resin as the formation fiber of raw material nonwoven fabric 10, aftermentioned random copolymer used time, from strengthen further its effect aspect and preferably, from being reduced in by softener the stick-slip sense produced because of random copolymer the nonwoven fabric 1 formed based on raw material nonwoven fabric 10, set out in the aspect that can obtain the nonwoven fabric of dry and comfortable skin sense of touch, particularly preferably.
In addition, raw material nonwoven fabric 10 is formed by the stacked nonwoven fabric of the layer of spun-bonded type and the layer of melt-blown, the layer of the spun-bonded type of this stacked nonwoven fabric is made up of multilayer, such as, when for spun-bonded type-stacked nonwoven fabric of melt-blown-spun-bonded type, spun-bonded type-spun-bonded type-melt-blown-stacked nonwoven fabric of spun-bonded type etc., preferably only in the layer of one deck spun-bonded type, be mixed into above-mentioned softener, also can be mixed in the layer of whole spun-bonded type.When being mixed into softener in the layer of one deck spun-bonded type, if apply processing described later process to this layer of side, then preferred from the aspect of the nonwoven fabric 1 that skin sense of touch is good, fracture strength is also high that can obtain when contacting skin.Like this, for nonwoven fabric 1, from the aspect that skin sense of touch during contact skin, anti-wet (wet back) measure, with by being formed compared with nonwoven fabric 1 based on the raw material nonwoven fabric 10 be made up of with the stacked nonwoven fabric of the layer of melt-blown the layer of spun-bonded type, more preferably form nonwoven fabric 1 by based on the raw material nonwoven fabric 10 be made up of spun-bonded nonwoven fabric monomer.
The formation fiber of raw material nonwoven fabric 10 mainly comprises thermoplastic resin, as thermoplastic resin, can enumerate polyolefin-based resins, polyester based resin, polyamide series resin, Chelate resin, vinyl resin, sub-vinylite etc.As polyolefin-based resins, polyethylene, polypropylene, polybutene etc. can be enumerated.As polyester based resin, polyethylene terephthalate, polybutylene terephthalate (PBT) etc. can be enumerated.As polyamide series resin, nylon etc. can be enumerated.As vinyl resin, polyvinyl chloride etc. can be enumerated.As sub-vinylite, Vingon etc. can be enumerated.Can be used alone the one or used in combination two or more in above-mentioned various resin, the modifier of above-mentioned various resin can also be used.In addition, as the long fiber forming raw material nonwoven fabric 10, composite fibre can also be used.As composite fibre, (side by side) fiber, core sheath fiber, the core sheath fiber of curling with core shift, segmentation fiber (divided fiber) etc. side by side can be used.When using composite fibre, if use core to be made up of polypropylene and the core sheath fiber that is made up of polyethylene of sheath, then from can obtain soft nonwoven fabric 1 aspect and preferably.Before processing described later, the fiber footpath of long fiber 2 is preferably more than 5 μm and less than 30 μm, more preferably more than 10 μm and less than 20 μm.
From the view point of spinning property, preferred feedstock nonwoven fabric 10 is formed by the acrylic resin as polyolefin-based resins.As acrylic resin, the viewpoint improved from the view point of skin sense of touch during smooth and contact skin, the easy degree of fracture, preferably comprise wantonly more than a kind more than 5 quality % in random copolymer, homopolymers, block copolymer and below 100 quality %, more preferably more than 25 quality % and the resin of below 80 quality %.In addition, can by these copolymers, homopolymers mixing, also can by other mixed with resin, but from aspect, the homopolymers of optimization polypropylene and the mixing of random copolymer of not easily fracture of wire when being shaped.Thus, the crystallinity of fiber is reduced, the fiber of fluffing self becomes soft, and skin sense of touch during contact skin improves, and can take into account with nonwoven fabric fracture strength, and the fiber of fluffing becomes and is easily cut off in weld portion such as embossing.Therefore, the fiber that can obtain not peeling off in heat-fused portion 3 such as embossing fusion points, fluffing shortens, is not easy the also good nonwoven fabric of fuzz balls, outward appearance.In addition, because the distribution of fusing point broadens, thus sealing improves.Further preferred based on propylene composition and by itself and ethene or alpha-olefin copolymer and the copolymer obtained as random copolymer, particularly preferably ethylene propylene copolymer resin.As acrylic resin, from the same viewpoint, preferably comprise the resin of more than ethylene propylene copolymer resin 5 quality %, more preferably comprise the resin of more than ethylene propylene copolymer resin 25 quality %.Preferably in ethylene propylene copolymer resin, ethylene concentration is more than 1 quality % and below 20 quality %, easily stretch when especially never adhering to and stretch, villus shedding is few, the aspect of fracture strength can be kept to set out, more preferably ethylene concentration is more than 3% and less than 8%.In addition, as acrylic resin, from the view point of environment, preferably comprise the resin of more than regenerating polypropylene resin 50 quality %, more preferably comprise the resin of more than regenerating polypropylene resin 70 quality %.It should be noted that, when forming nonwoven fabric 1 based on the stacked nonwoven fabric of the layer of the layer of spun-bonded type and melt-blown, also identical.
For the nonwoven fabric 1 formed by raw material nonwoven fabric 10, from the view point of cheap and can obtain good skin sense of touch and processing adaptability when contacting skin, its weight per unit area is preferably 5g/m 2above and 100g/m 2below, more preferably 5g/m 2above and 25g/m 2below.
In addition, for the nonwoven fabric 1 formed as above, from the view point of skin sense of touch excellence, its loose pliability is preferably below 10cN, more preferably below 5.9cN, and is preferably more than 0.5cN.
It should be noted that, for raw material nonwoven fabric 10, from the view point of obtaining soft nonwoven fabric and skin sense of touch excellence, its loose pliability is preferably below 15cN, more preferably below 10cN, and be preferably more than 3cN, more preferably more than 5cN.Specifically, be preferably more than 3cN and below 15cN, more preferably more than 5cN and below 10cN.
Loose pliability is measured by following determination method.
(determination method of loose pliability)
The loose pliability of nonwoven fabric 1 is under 22 DEG C of 65%RH environment, nonwoven fabric 1 is cut into Y-direction (long side direction) is 150mm, X-direction (width) is 30mm, use stapler (Hotchkiss) fixed at upper and lower two places end and become the circular of diameter 45mm.Now the staple of stapler (stapler) is set as in the Y direction that (long side direction) is above length direction.Cupping machine is used (to be such as Orientec Co., Ltd. Tensilon cupping machine " RTA-100 " processed), above-mentioned annulus is found into tubular by sample bench, measure by top with the flat board substantially parallel with sample bench with the peak load during speed compression of compression speed 10mm/ minute, as loose pliability.
In nonwoven fabric of the present invention, leave aggregate of fibers 11 and for the fiber 20 of free end 20b that erects, the water-wetness of fiber 20 is lower than the water-wetness of the fiber forming aggregate of fibers 11 for having.Less with the contact angle of water, then represent that hydrophily is higher.In other words, the fiber 20 with free end 20b is more hydrophobic than the fiber forming aggregate of fibers 11, and fiber 20 is higher relative to the contact angle of pure water than the fiber forming aggregate of fibers 11 relative to the contact angle of pure water.Specifically, from the view point of making once absorbed body fluid not easily reflux, the fiber 20 with free end 20b relative to the contact angle of pure water preferably higher than 80 °, preferred higher than 85 ° further, if more than 90 °, then particularly preferably.Be transferred to rapidly from the view point of making body fluid and absorb side, the fiber forming aggregate of fibers 11 relative to the contact angle of pure water preferably lower than 90 °, preferred lower than 85 ° further, if less than 80 °, then particularly preferably.From the view point of taking into account the liquid permeability of liquid and the not easily reflow of liquid, the contact angle preferably with the fiber 20 of free end 20b exceeds more than 5 ° relative to the contact angle of the fiber forming aggregate of fibers 11, more preferably exceeds more than 10 °.It should be noted that, herein, there is difference in the value of contact angle, namely, water-wetness difference refers to, the value of the contact angle utilizing said determination method to measure exists the difference of more than 3 °.
The concrete assay method of above-mentioned contact angle is as follows.The contact angle meter MCA-J of the interface science Co., Ltd. that such as coordinates is used in the mensuration of contact angle.Specifically, after ion exchange water that nonwoven fabric 1 drips (about 20 skin liter (picolitre)), above-mentioned contact angle meter is used to carry out the mensuration of contact angle immediately.Particularly for the contact angle of fiber 20 with free end 20b, the part obtained being cut by the fiber 20 with free end 20b measures, for form aggregate of fibers 11 the fiber do not fluffed contact angle for, to the fiber 20 that there is free end except described in nonwoven fabric 1 and except heat-fused portion 3,3 erects circlewise fibrae circulares 23 each other, namely, the part cutting of the fiber of aggregate of fibers 11 to be obtained measures.The position being respectively determined at more than 5 positions is carried out, using their mean value as contact angle.Carry out under being determined at 22 DEG C of 65%RH environment.
For nonwoven fabric 1, be transferred to rapidly from the view point of making body fluid and absorb side, in the fiber forming nonwoven fabric 1, fiber spacing is from for more than 150 μm and the ratio of the fiber of less than 300 μm is preferably more than 30%, more preferably more than 35%, be particularly preferably more than 40%.
The fiber spacing of nonwoven fabric 1, from according to mercury penetration method (JIS R 1655), uses mercury injection apparatus (mercury porosimeter) (Shimadzu Seisakusho Ltd. (strain)) to measure.Mercury penetration method is for by measuring the fiber size of (fiber spacing from) or its volume each other forming aggregate of fibers 11, thus obtains the gimmick of the information of the physical form of aggregate of fibers 11.The principle of mercury penetration method is, applies pressure and be pressed between the formation fiber as the nonwoven fabric 1 of measuring object to mercury, measures the relation of now applied pressure and (immersion) mercury volume be squeezed into.Below, to use mercury injection apparatus nonwoven fabric 1 fiber spacing from assay method be described.
(form nonwoven fabric 1 fiber fiber spacing from assay method)
First, nonwoven fabric 1 is cut into 24mm × 15mm.Cut 3 altogether, these cutting samples are arranged in the sample cell of mercury injection apparatus (Shimadzu Seisakusho Ltd. (strain)) according to the mode do not overlapped mutually, measure pore capacity.Specifically, utilize the assay method of the pore capacity of mercury penetration method as described below.That is, slowly change mercury applied pressure, measure the volume of the mercury be now squeezed in hole, in other words, measure pore capacity, describe and convert according to following formula (1) and the relation of aperture (fiber spacing from) D that obtains and pore capacity.Aperture (μm) is now set to fiber spacing from (μm).
D＝-4γcosθ/P···(1)
Wherein, aperture (fiber spacing from) is set to D, the surface tension of mercury is set to γ, contact angle is set to θ, pressure is set to P.As the condition determination in above-mentioned formula (1), the surface tension of mercury is 482.536dyn/cm, and contact angle is 130 °, and mercury pressure is 0 ~ 60000psia.
According to the distribution curve (integral calculus curve) of the aperture of the nonwoven fabric 1 obtained (fiber spacing from), be from the summation of the aperture of more than 0 μm to less than 500 μm (fiber spacing from) as total capacity using aperture (fiber spacing from), obtain more than 150 μm and the capacity relative of the aperture of less than 300 μm (fiber spacing from) in the ratio of above-mentioned total capacity.Mensuration carries out 3 times, using their mean value as fiber spacing from for more than 150 μm and the ratio of less than 300 μm (%).Carry out under being determined at 22 DEG C of 65%RH environment.
For nonwoven fabric 1, from the view point of damaged when preventing from using and processing adaptability, the value of its fracture strength is preferably more than 5.0N/50mm, more preferably more than 8.0N/50mm and below 30.0N/50mm.It should be noted that, from the view point of making the fracture strength of nonwoven fabric 1 reach above-mentioned value, the value of the fracture strength of raw material nonwoven fabric 10 is preferably more than 7.0N/50mm, more preferably more than 10.0N/50mm and below 50.0N/50mm.If utilize fluffing method described later, then compared with other raising method, the value of the fracture strength of manufactured nonwoven fabric 1 not easily reduces compared with the value of the fracture strength of raw material nonwoven fabric 10.Preferred nonwoven fabric 1 meets above-mentioned scope in the cd direction with the fracture strength as the raw material nonwoven fabric 10 on its basis.The ratio of nonwoven fabric 1 and the fracture strength of the raw material nonwoven fabric 10 as its basis (fracture strength of nonwoven fabric 1/based on the fracture strength of raw material nonwoven fabric 10) is preferably more than 0.5 and less than 1.0, and more preferably more than 0.7 and less than 1.0.Fracture strength adopts following methods to measure.
(determination method of fracture strength)
Under 22 DEG C of 65%RH environment, to cut out along CD direction from nonwoven fabric 1 or raw material nonwoven fabric 10 (such as spun-bonded nonwoven fabric) be 200mm, be the mensuration sheet of the rectangular shape of the size of 50mm along MD direction.The mensuration sheet of the rectangular shape this cut out is as working sample.Become the mode of draw direction according to CD direction, this working sample is arranged on the chuck of cupping machine (such as Orientec Company Tensilon cupping machine " RTA-100 ").Chuck spacing is made to be 150mm.With 300mm/ minute stretching working sample, the peak load point till near sample breakage was set to the fracture strength in CD direction.In addition, to cut out along MD direction be 200mm, be the mensuration sheet of the rectangular shape of the size of 50mm along CD direction, it can be used as working sample.The mode that this working sample becomes draw direction according to its MD direction is arranged on the chuck of cupping machine.According to the step that the assay method of the fracture strength with above-mentioned CD direction is same, obtain the fracture strength in MD direction.
Good based on skin sense of touch (feel) when possessing the face contact skin of the fiber 20 with free end 20b, therefore also feature is imparted to nonwoven fabric 1.
Known a lot of characteristic value in the past representing skin sense of touch, especially usually knownly utilizes the KES of Kato Tech Co., Ltd. and the characteristic value (bibliography: the standardization of hand valuation and parsing (Wind closes い Evaluation value Standard Quasiization と and resolves) (the 2nd edition), author river end Ji Xiong, issue on July 10th, 1980) that obtains.Particularly in order to represent soft sense, known LC (linearity of compression load-compression curve), WC (work done during compression), the RC (elasticity of compression) being wherein called as three characteristic values of compression property.For these compression properties, by applying load 0.49cN/cm 2(0.50gf/cm 2) more than and 49.0cN/cm 2(50.0gf/cm 2) (0.49cN/cm in high sensitivity measuring below 2above and 9.80cN/cm 2(0.50gf/cm below 2above and 10.0gf/cm 2deflection time below)) and calculate characteristic value.But, for (the 5g/m that weight per unit area is little 2above and 25g/m 2the cloth that below) nonwoven fabric etc. are very thin, there will not be large difference, little with the correlation of skin sense of touch.In addition, load when people contacts absorbent commodity is 0.98cN/cm 2(1.00gf/cm 2) left and right, people experiences skin sense of touch with very light load, based on regard to for representing that the characteristic value with regard to original skin sense of touch in the scope less than load is in the past useful this consideration, is from 0.29cN/cm by load 2(0.3gf/cm 2) to 0.98cN/cm 2(1gf/cm 2) between load and deflection now and found new characteristic value.This characteristic value as represent faithfully spun-bonded nonwoven fabric and hot-wind nonwoven cloth skin sense of touch difference numerical value and illustrate, and can as representing that the new characteristic value of skin sense of touch of spun-bonded nonwoven fabric represent nonwoven fabric.
(Compression characteristics during small load)
In this manual, Compression characteristics during small load is defined as the new characteristic value representing skin sense of touch.Carry out under being determined at 22 DEG C of 65%RH environment.The initial data of Compression characteristics when using the KES FB3-AUTO-A (trade name) of Kato Tech Co., Ltd. to carry out the small load of measure and calculation.Nonwoven fabric 1 is cut into 3 of 20cm × 20cm, prepares working sample.Then, by wherein 1 working sample with rise hair side (possessing the face of the fiber 20 with a free end 20b) mode be upward arranged at testing stand (when not fluffing or when fluff on two sides, measures two faces also employing there is the one side of smaller value).Then, there is area 2cm 2circular flat steel plate between compress.Compression speed is 20 μm/sec, and maximum compression load is 9.80cN/cm 2(10.0gf/cm 2), recovery process also measures at the same rate.Now, the displacement between steel plate is set to x (mm), load is set to y (cN/cm 2), the position of point load being detected is set to x=0, compression direction measures.More compressed, then x value is larger.
Pass through measured data (x, y), the deflection of thickness when selecting small load and Compression characteristics when calculating small load.Specifically, in not recovery process, first time load is selected for from 0.29cN/cm 2(0.30gf/cm 2) to 0.98cN/cm 2(1.00gf/cm 2) between load and the data of deflection now, for the relation of x and y, obtain near linear by least square method, using slope now as above-mentioned characteristic value (unit (cN/cm 2)/mm).1 working sample measures 3 positions.Carry out the mensuration that 3 samples add up to 9 positions.Calculate 9 position characteristic values separately, using their mean value as Compression characteristics during the small load of this nonwoven fabric.
Compression characteristics when having found small load is relevant to skin sense of touch, particularly found when based on raw material nonwoven fabric 10 identical there is stronger correlation.(during small load) Compression characteristics is lower numerical value, then represent and more easily destroyed by comparatively Smaller load, can represent that people experiences the good degree of the sensation (particularly soft sense) of skin sense of touch.Such as, do not apply processing process described later, common weight per unit area is 5g/m 2above and 25g/m 2the above-mentioned Compression characteristics of the raw material nonwoven fabric 10 (such as spun-bonded nonwoven fabric) based on following is 19.6 (cN/cm 2)/mm (20.0 (gf/cm 2)/mm) more than and 29.4 (cN/cm 2)/below mm (30.0 (gf/cm 2)/mm) below, on the other hand, with regard to based on raw material nonwoven fabric 10 (such as spun-bonded nonwoven fabric) be applied with described later processing process after nonwoven fabric 1, surface becomes easy destruction, becomes 17.6 (cN/cm 2)/below mm (18.0 (gf/cm 2)/mm) below.That is, from the view point of skin sense of touch, to 5g/m 2above and 25g/m 2the above-mentioned Compression characteristics of the nonwoven fabric 1 that the raw material nonwoven fabric 10 (such as spun-bonded nonwoven fabric) based on following is applied with after processing process is 17.6 (cN/cm 2)/mm (18.0 (gf/cm 2)/mm) below, be preferably 14.7 (cN/cm 2)/mm (15.0 (gf/cm 2)/below mm), from the view point of the skin sense of touch become close to the good hot-wind nonwoven cloth of skin sense of touch, preferably become 9.80 (cN/cm further 2)/mm (10.0 (gf/cm 2)/mm) below.Be 5g/m to weight per unit area 2above and 25g/m 2the lower limit of the above-mentioned Compression characteristics of the nonwoven fabric 1 after the raw material nonwoven fabric 10 (such as spun-bonded nonwoven fabric) based on following is applied with processing process is not particularly limited, but from the view point of in manufacture, is 0.98 (cN/cm 2)/mm (1.00 (gf/cm 2)/mm) left and right.In the processing process such as raising method in the past, be difficult to the mode according to just having characteristic value as above when not making fracture strength significantly reduce, to 5g/m 2above and 25g/m 2processing process implemented by raw material nonwoven fabric 10 (particularly spun-bonded nonwoven fabric) based on weight per unit area so is below low.
The heat-fused portion 3 of nonwoven fabric 1 is from the view point of skin sense of touch, processing adaptability, and the area of each heat-fused portion 3 is preferably 0.05mm 2above and 10mm 2below, more preferably 0.1mm 2above and 1mm 2below.The quantity of heat-fused portion 3 is preferably 10/cm 2above and 250/cm 2below, more preferably 35/cm 2above and 65/cm 2below.The adjacent heat-fused portion 3 in CD direction each other in distance be in the heart preferably more than 0.5mm and below 10mm, more preferably more than 1mm and below 3mm, the adjacent heat-fused portion 3 in MD direction each other in distance be in the heart preferably more than 0.5mm and below 10mm, more preferably more than 1mm and below 3mm.
Heat-fused portion 3 can enumerate the heat-fused portion formed discontinuously by the thermo-compressed based on embossing (utilizing the convex roller of embossing and plain-barreled roll etc.), the heat-fused portion etc. making its part welding based on the heat-fused portion of ultrasonic fusing, discontinuously applying hot blast.Wherein, based on thermo-compressed heat-fused portion easily make fibrous fracture in preferred.The shape of heat-fused portion 3 is not particularly limited, and can be the arbitrary shapes such as such as circle, rhombus, triangle.The ratio that the total area of heat-fused portion 3 accounts for the surface area of the one side of nonwoven fabric 1 is preferably more than 5% and less than 30%, be not easy balling-up in more preferably more than 10% and less than 20%.
With regard to nonwoven fabric 1, such as formed based on the spun-bonded nonwoven fabric be made up of long fiber 2, and form the part fracture of fiber 2 and the only end 20a fiber 20 (there is the fiber 20 of free end 20b) that utilizes heat-fused portion 3 to be fixed, and fiber 20 comprises the thicker fiber of free end 20b 21 (with reference to Fig. 1).As the fiber that top is thicker, preferably the section of its top ends is the fiber of flat (ellipse or the shape of caving in).Thus, what can obtain soft top plays wool fibre, can obtain the nonwoven fabric little to the stimulation of skin.As shown in Figure 1, the fiber 20 that only an end 20a utilizes heat-fused portion 3 to be fixed comprises the thicker fiber 21 of the free end 20b of side, the other end and the not thicker fiber 22 of free end 20b.Herein, " free end " refers to " the other end " in the fiber 20 that an only end 20a utilizes heat-fused portion 3 to be fixed, in other words, refers to " top ends ".Utilize following determination method to measure fiber footpath, calculate the increase ratio in fiber footpath, top, judge that whether free end 20b is thicker.
(determination method in fiber footpath)
First, under 22 DEG C of 65%RH environment, as shown in Fig. 3 (a), with sharp razor, from measured nonwoven fabric 1, to cut out CD direction be 2cm, MD direction is the mensuration sheet of the size of 2cm, as shown in Fig. 3 (b), the working sample of outer turnover (mountain fold) will be carried out at turn back line Z (the return line Z) place extended along CD direction through multiple heat-fused portion 3, and load as Suo Shi Fig. 3 (c) and be fixed on the scanning electron microscope (SEM) being loaded with carbon ribbon and use on aluminum sample bench.Next, from the SEM image being amplified to about 750 times, select 10 only end 20a fibers 20 of utilizing heat-fused portion 3 to be fixed at random, take pictures near the top of the free end of these fibers.Utilize the photo (with reference to Fig. 2) obtained, be determined at the fiber footpath (the footpath 21a of the fiber 20 at the position of removing free end 20b) of the fiber 20 of the position on 120 μm, the top of distance free end 20b respectively.The gradient during mensuration of the footpath 21a of the fiber 20 at the position at removing free end 20b is directly moved to free end 20b side, and mensuration is clipped in the fiber footpath (the footpath 21b of the fiber 21 at free end 20b place) of the fiber 21 of position the thickest in the region between the top of free end 20b and the position on distance 20 μm, top.It should be noted that, when top ends is flat, based on viewing angle, top seems not thick sometimes, but now also utilizes the photo obtained directly to measure.
The thicker fiber 21 of free end 20b refers to the fiber meeting following necessary condition, in previous select at random 10 fibers 20, utilize the footpath 21a of the fiber 20 at the footpath 21b of fiber 20 that recorded respectively by the photo of 10 fibers 20, free end 20b and the position of removing free end 20b, the value of the increase ratio in the fiber footpath, top obtained by following formula (2) is more than 15%.Be inhibited from the fracture that can obtain heat-fused portion 3 fiber on (border of removing heat-fused portion 3 and fiber, fibre morphology part) each other, the reduction of fracture strength is inhibited and the aspect of the good fiber of skin sense of touch, preferred increase more than 20%, more preferably increases more than 25%.
Increase ratio (%)=[((21b-21a) ÷ 21a) × 100] (2) in fiber footpath, top
In nonwoven fabric 1, improve from the view point of skin sense of touch when taking into account contact skin and the viewpoint of fracture strength, resiliency, only an end 20a utilize heat-fused portion 3 to be fixed fiber 20 (fiber 21 that free end 20b is thicker and the not thicker fiber 22 of free end 20b) in, the ratio of fiber 21 that free end 20b is thicker is preferably more than 20%, more preferably more than 30%, be particularly preferably more than 40%.For the ratio of the thicker fiber 21 of free end 20b, 10 fibers 20 arbitrarily selected in the determination method in above-mentioned fiber footpath are amplified to the SEM image of about 750 times by utilization, calculate the increase ratio in fiber footpath, top respectively, calculate the ratio of the thicker fiber of free end 20b 21.
As shown in Figure 1, nonwoven fabric 1 has the fibrae circulares 23 that heat-fused portion 3,3 erects each other in the form of a ring." fibrae circulares 23 " that erect refers to, in the determination method in above-mentioned fiber footpath, when observing as shown in Fig. 3 (c), side, the other end does not have free end 20b, but the fiber erected away from more than turn back line Z0.5mm.In this manual, fibrae circulares 23 refers to the above-mentioned fibrae circulares erected.As shown in Figure 1, form the fiber of nonwoven fabric 1 to have: the fiber 21 thicker by free end 20b and the not thicker fiber 22 of free end 20b are formed and the only end 20a fiber 20 (having the fiber 20 of free end 20b) that utilizes heat-fused portion 3 to be fixed; And except fiber 20, at the fibrae circulares 23 that heat-fused portion 3,3 erects each other in the form of a ring; Also there is the fiber do not fluffed.The fiber do not fluffed based on this and form aggregate of fibers 11.For the average fiber footpath of the formation fiber of aggregate of fibers 11, arbitrarily select 10 fibers do not fluffed and cut, according to above-mentioned (determination method in fiber footpath), similarly measure and obtain mean value.
For nonwoven fabric 1, from the view point of not being hung on skin, sense of discomfort reduction, the raising of skin sense of touch when being related to contact skin, in the fiber forming nonwoven fabric 1, the ratio of the fibrae circulares 23 in the sum of only the end 20a fiber 20 (having the fiber 20 of free end 20b) that utilizes heat-fused portion 3 to be fixed and fibrae circulares 23 is preferably less than 50%, more preferably less than 45%, be particularly preferably less than 40%.In the determination method in above-mentioned fiber footpath, Stochastic choice 10 fibers from the SEM image being amplified to about 50 times, the fiber 20 (fiber 22 that the thicker fiber 21 of free end 20b, free end 20b are not thicker) and fibrae circulares 23 with free end 20b is chosen from 10 fibers of Stochastic choice, calculate the ratio of the fiber 23 (fibrae circulares) in the sum of fiber 21, fiber 22 and fiber 23, obtain the ratio of fibrae circulares 23.It should be noted that, for measured value, utilize 9 of other position SEM images to obtain ratio similarly, calculate mean value by these 10.It should be noted that, when comprising 1 fibrae circulares 23 in 10 fibers of Stochastic choice, fibrae circulares 23 can be counted as 1.
In nonwoven fabric 1, by comprising the free degree and become higher fiber and by interfibrous gap landfill, thus make the roughness on surface little and become smooth, improve skin sense of touch during contact skin thus, from the view point of related to this, the distribution (decentralization) in fiber footpath is more wide more preferred, from the view point of skin sense of touch, if fiber footpath be distributed as more than 0.33, then can obtain the effect that should fully meet, if fiber footpath be distributed as more than 0.35, then can obtain the effect that should meet further.The distribution (decentralization) in fiber footpath does not have the special upper limit, but preferably less than 100.It is further preferred that the distribution in fiber footpath (decentralization) is preferably more than 0.35 and less than 0.9.The distribution (decentralization) in fiber footpath mentioned here refers to the distribution (decentralization) in the fiber footpath of the whole fibers forming nonwoven fabric 1, is the only end 20a fiber 20, the fibrae circulares 23 that utilize heat-fused portion 3 to be fixed and both ends utilize heat-fused portion 3 to be fixed and the distribution that the fiber do not erected in the form of a ring (not processing the fiber of the impact brought by aftermentioned processing) is overall.The distribution (decentralization) in fiber footpath measures with following methods.
(determination method of the distribution (decentralization) in fiber footpath)
First, under 22 DEG C of 65%RH environment, with sharp razor, from measured nonwoven fabric 1, to cut out CD direction be 2cm, MD direction is the mensuration sheet of the size of 2cm, it directly load bendingly and be fixed on be loaded with carbon ribbon scanning electron microscope (SEM) use aluminum sample bench on.Next, from the SEM image being amplified to about 750 times, extract 10 fibers out randomly, (it should be noted that in the Site Determination fiber footpath separately of removing free end 20b, when forming carry out measuring nonwoven fabric 1 based on the stacked nonwoven fabric of the layer of the layer of spun-bonded type and melt-blown, do not select the fiber of the layer of melt-blown, and only select the fiber of the layer of spun-bonded type.)。In 1 above-mentioned aluminum sample bench, measure 10 fiber footpaths in a manner described, by the 10 fiber footpath d recorded 1~ d 10obtain mean value d ave, by the 10 fiber footpath d obtained 1~ d 10with mean value d ave, the distribution in the fiber footpath of 10 fibers selected at random is obtained by following formula (3).Analytical unit to be set to μm, with the resolution measurement of 0.1 μm.With regard to the distribution in the fiber footpath of 10 fibers, for every 1 nonwoven fabric 1, make in 6 positions of above-mentioned aluminum sample bench, using the distribution as the fiber footpath of nonwoven fabric 1 of the mean value (with reference to following formula (4)) of the distribution in the fiber footpath of 10 fibers that obtained by each position.It should be noted that, the calculating of the distribution in the fiber footpath of 10 fibers uses the VARPA function in the table software for calculation excel2003 of Microsoft.
Distribution=[(the d in the fiber footpath of 10 fibers 1-d ave) 2+ (d 2-d ave) 2+ (d 10-d ave) 2)]/10 (3)
Distribution (decentralization)=(summation of the distribution in the fiber footpath of 10 fibers obtained in above-mentioned formula (3))/6 (4) in the fiber footpath in nonwoven fabric 1
For nonwoven fabric 1, improve from the view point of skin sense of touch when the viewpoint of the raising of resiliency, contact skin, the radical of the fiber of fluffing is preferably 8/more than cm, is more preferably 12/more than cm.At this, the fiber of fluffing comprises the fiber 20 (fiber 22 that the thicker fiber 21 of free end 20b, free end 20b are not thicker) and fibrae circulares 23 in nonwoven fabric 1 with free end 20b.For the fiber of above-mentioned fluffing, from the view point of obtaining sufficient fracture strength, the upper limit is 100/below cm, from the aspect can't see fine hair in appearance and erect, is more preferably 40/below cm.The following determination method of fiber utilization of above-mentioned fluffing measures.In the application, " possessing the nonwoven fabric of the fiber of fluffing " refers to that the fiber fluffed in following determination method is the nonwoven fabric of 5/more than cm.
(determination method of the radical of the fiber of fluffing)
Fig. 4 represents the schematic diagram that the method for the radical of the fiber fluffed occurs among the fiber that to be determined under 22 DEG C of 65%RH environment and to form nonwoven fabric 1.First, from measured nonwoven fabric, cut out the mensuration sheet of 20cm × 20cm with sharp razor, as shown in Fig. 4 (a), the face of fluffing measuring sheet is carried out turn up folding and form working sample 104.Next, make this working sample 104 be placed on the black lining paper of A4 size, as shown in Fig. 4 (b), mounting has the black lining paper of the A4 size in the hole 107 of vertical 1cm × horizontal 1cm thereon further.Now, as shown in Fig. 4 (b), be configured the folding line 105 of mensuration sample 104 can be seen from the hole 107 of the black lining paper of upside.Two lining papers use " Kenran paper (black) ream weight (ream weight) 265g " of republicanism paper Co., Ltd. of Fuji.Afterwards, depart from the position of 5cm in the both sides in the hole 107 of the lining paper from upside respectively along folding line 105 laterally, load the counterweight of 50g respectively, make the state measuring sample 104 and be fully folded.Next, as shown in Fig. 4 (c), use microscope (KEYENCE Inc. VHX-900), observe in the hole 107 of lining paper with the multiplying power of 30 times, measure the radical of the fiber at the every 1cm existed closer to the position of top than following imaginary line 108, described imaginary line 108 is formed in the position moving in parallel 0.2mm from the folding line 105 of working sample 104 upward.Measure 9 positions, using the quantity of mean value (second decimal place rounds up) as the fiber of fluffing.
In addition, when the quantity of the fiber to fluffing counts, such as, the fiber 106a as shown in Fig. 4 (c), when existing to be in distance folding line 105 be the fiber of imaginary line 108 crosscut secondary located above 0.2mm, it is two by this Counting of fibers.Specifically, in the example shown in Fig. 4 (c), the fiber of imaginary line 108 crosscut 1 time is existed 4, the fiber 106a of imaginary line 108 crosscut 2 times is existed 1, but the fiber 106a of crosscut 2 times is counted as 2, and the radical of the fiber of fluffing becomes 6.
For nonwoven fabric 1, from the view point of the skin sense of touch improved when contacting skin, the average fiber footpath of fiber (be the fiber of crosscut imaginary line 108, comprise the fiber 20 and fibrae circulares 23 with free end 20b) of fluffing be preferably less than the position of not fluffing of the same face surface fiber (non-crosscut imaginary line 108 and do not arrive imaginary line 108 fiber, namely, form the fiber do not fluffed of aggregate of fibers 11) average fiber footpath.Average fiber footpath refers to the fiber footpath utilizing microscope (light microscope or SEM etc.) to be measured the fiber of fluffing and the fiber footpath at each 12 places of fiber of not fluffing.The average fiber footpath of the fiber preferably do not fluffed in the average fiber footpath of fiber of fluffing less than 98% and more than 40%, due to skin sense of touch excellence, be thus more preferably less than 96% and more than 70%.Similarly, for the average fiber footpath of fiber 20 with free end 20b and the average fiber footpath of fibrae circulares 23, preferably they are all little than the average fiber footpath of the fiber (fiber do not fluffed) forming aggregate of fibers 11, the fiber footpath of the fiber preferably do not fluffed less than 98% and more than 40%, because skin sense of touch is excellent, be thus more preferably less than 96% and more than 70%.
In addition, as mentioned above, for nonwoven fabric 1, the radical of the fiber (comprise and have the fiber 20 of free end 20b and the fiber of fibrae circulares 23) of preferably fluffing is 8/more than cm and the fluffing of the fiber of fluffing is highly below 1.5mm.Thus, the absorbent commodity that resiliency improves, skin sense of touch improves can be obtained.From being not easy balling-up, fine hair do not allow caducous viewpoint, fluffing highly more preferably below the 1.0mm of the fiber of fluffing.On the other hand, if more than 0.2mm, then can obtain the nonwoven fabric of good skin sense of touch.In addition, viewed from the aspect that the anti-moisture the absorption characteristic of body fluid reduces, preferably fluffing is highly more than 0.5mm.When by rise a hair side be used for the side, face contacting skin, from being not easy and skin lash and feel comfortable aspect, more preferably fluffing is highly below 1.0mm.In addition, resiliency raising and can obtain the fast material of the infiltration rate of body fluid in, the fiber of fluffing is suitably 15/more than cm.In addition, if the height of the fiber of fluffing is more than 5mm, then becomes the outward appearance of fine hair standing shape, if rub in use, then balling-up, villus shedding can occur, thus not preferred.Herein, fluffing height is different from the length of fiber, to refer to when measuring not drawing of fiber but in the raw under the height of fiber.When the value of length of the fiber of fluffing is large, the rigidity height of fiber time, the fluffing of the fiber of fluffing highly has the tendency uprised.The fluffing of the fiber of fluffing highly utilizes following determination method to measure.
(determination method of the fluffing height of the fiber of fluffing)
When measuring the radical of fiber (comprise and there is the fiber 20 of free end 20b and the fiber of fibrae circulares 23) of fluffing, the fluffing height of the fiber of Simultaneously test fluffing.Specifically, as shown in Fig. 4 (c), observe in the hole 107 of lining paper, abreast every 0.05mm setting-out from folding line 105, until not crossing with the fiber of fluffing.Next, compared with the radical (being judged by the imaginary line 108 be positioned at above 0.2mm) of the fiber of the fluffing measured as described above, select the fiber crossing with parallel lines to reach the parallel lines of half, will from then on arrive the distance of folding line as fluffing height.Above operation is measured three amounts for measured nonwoven fabric, and every a slice measures three positions, obtains the mean value that three add up to nine positions, as the height of the fiber of fluffing.
From the nonwoven fabric of softness and the aspect of skin sense of touch excellence when can obtain contact skin, preferably on the basis of the radical of the fluffing height of the fiber of fluffing and the fiber of fluffing, the loose pliability of nonwoven fabric 1 is below 8.0cN.And from the aspect of the material of the softness of the clothes and so on become for such as baby, child, the loose pliability of preferred nonwoven fabric 1 is more than 0.5cN and below 3.0cN.Loose pliability utilizes following determination method to measure.
(assay method of loose pliability)
The loose pliability of nonwoven fabric 1 is: nonwoven fabric 1 to be cut into MD direction be 150mm, CD direction is 30mm, uses stapler fixed at upper and lower two places end and become the circular of diameter 45mm.Now the staple of stapler (stapler) is set as being length direction in the MD direction.Cupping machine is used (to be such as Orientec Co., Ltd. Tensilon cupping machine " RTA-100 " processed), above-mentioned annulus is found into tubular by sample bench, measure by top with the flat board substantially parallel with sample bench with the peak load during speed compression of compression speed 10mm/ minute, as the loose pliability in CD direction.Then, change MD direction and CD direction and make annulus, similarly measure the loose pliability in MD direction.MD direction and CD direction make 2 annulus respectively and measure, using the loose pliability of the mean value in these CD directions and MD direction as nonwoven fabric 1.
Next, the manufacture method of nonwoven fabric 1 is described.Limit is described with reference to the suitable manufacturing methods of Fig. 5 ~ Fig. 8 limit to nonwoven fabric 1.As shown in Figure 5, the manufacturing installation that can preferably use in the manufacture method of nonwoven fabric 12 is roughly divided into the pre-add Ministry of worker 4 and the fluffing processing department 5 in the configuration of the downstream of the pre-add Ministry of worker 4.Also this pre-add Ministry of worker is called local elongation processing department.
As shown in Figures 5 and 6, the pre-add Ministry of worker 4 possesses the steel coupling knurling rolls 43 be made up of pair of rolls 41,42.As shown in Figure 6, steel coupling knurling rolls 43 are the steel coupling knurling rolls of the metallic drum such as aluminium alloy or iron and steel, a roller 41 has multiple protuberance 411 at periphery, and another roller 42 has the recess 422 that protuberance 411 can be filled in the position corresponding with the protuberance 411 of a roller 41 of periphery.In addition, as shown in Figure 6, another roller 42 has multiple protuberance 421, roller 41 at periphery and has protuberance 421 in the position corresponding with the protuberance 421 of another roller 42 of periphery and can fill in recess 412.As shown in Figure 6, protuberance 411,421 and recess 412,422 are all configured to zigzag at respective periphery by a pair concavo-convex roller 41,42.Pair of rolls 41,42 rotates engagingly by carrying out the driving force of automatic drive device (not shown) to the rotating shaft conduction of at least one party.In the manufacturing installation of present embodiment, protuberance 411,421 is each other arranged at and recess 422 each other, 412 corresponding positions, and in addition, a concavo-convex roller 41 is identical rollers with another concavo-convex roller 42.Therefore, in the following description, for same part, mainly the protuberance 411 of a concavo-convex roller 41 is described.In addition, such as shown in Figure 5 and Figure 6, the carrying roller 44,45 that uses when the steel coupling upstream side of knurling rolls 43 and downstream possess conveyance raw material nonwoven fabric 10 of the pre-add Ministry of worker 4.The control part (not shown) that the rotary speed of steel coupling knurling rolls 43 is possessed by manufacturing installation controls.
As shown in Figure 7, for each protuberance 411 of roller 41, the height h from the periphery of roller 41 to the summit of protuberance 411 is preferably more than 1mm and below 10mm, more preferably more than 2mm and below 7mm.Protuberance 411 distance each other (spacing) adjacent on rotating shaft direction is preferably more than 0.01mm and below 20mm, more preferably more than 1mm and below 10mm, protuberance 411 distance each other (spacing) P adjacent in a circumferential direction 1be preferably more than 0.01mm and below 20mm, more preferably more than 1mm and below 10mm.The shape of the top surface of each protuberance 411 of roller 41 is not particularly limited, and such as can use circle, polygonal, ellipse etc., the area of the top surface of each protuberance 411 is preferably 0.01mm 2above and 500mm 2below, more preferably 0.1mm 2above and 10mm 2below.Each recess 422 of roller 42 is configured at the position corresponding with each protuberance 411 of roller 41.Each protuberance 411 of roller 41 is more than 3.5mm with the degree of depth D (length of the part that each protuberance 411 overlaps with each protuberance 421) (with reference to Fig. 7) engaged of each protuberance 421 of roller 42, be preferably more than 3.7mm, more preferably more than 4mm, and be below 5mm, be preferably below 4.8mm, more preferably below 4.5mm, specifically, for more than 3.5mm and below 5mm, be preferably more than 3.7mm and below 4.8mm, more preferably more than 4mm and below 4.5mm.
As shown in Figure 8, fluffing processing department 5 possesses the convex roller 51 being provided with protuberance 511 at periphery, possesses the carrying roller 52,53 for transporting the nonwoven fabric 10 ' after preprocessing at the upstream side of convex roller 51 and downstream.By carrying out the driving force of automatic drive device (not shown) to the rotating shaft conduction of convex roller 51, convex roller 51 is rotated.
For each protuberance 511 of convex roller 51, the height from the periphery of convex roller 51 to the summit of protuberance 511 is preferably more than 0.001mm and below 3mm, more preferably more than 0.001mm and below 0.1mm.Owing to also comprising the convex roller of little height like this, therefore in convex roller 51, also comprise so-called sandblasting roller.Protuberance 511 distance each other (spacing) adjacent on rotating shaft direction is preferably more than 0.1mm and below 50mm, more preferably more than 0.1mm and below 3mm, protuberance 511 distance each other (spacing) adjacent is in a circumferential direction preferably more than 0.1mm and below 50mm, more preferably more than 0.1mm and below 3mm.The shape of the top surface of each protuberance 511 of convex roller 51 is not particularly limited, and such as can use circle, polygonal, ellipse etc., the area of the top surface of each protuberance 511 is preferably 0.001mm 2above and 20mm 2below, more preferably 0.01mm 2above and 1mm 2below.It should be noted that, when convex roller 51 is for sandblasting roller, the density of protuberance 511 is preferably 1000/cm 2above and 3000/cm 2below, more preferably 1200/cm 2above and 2500/cm 2below.
In the manufacturing installation of the pre-add Ministry of worker 4 and fluffing processing department 5 that possess such formation, first, using the raw material as nonwoven fabric 1, the such as banded hydrophilic material nonwoven fabric 10 after hydrophilicity-imparting treatment lays out from roller, via carrying roller 44,45, hydrophilic material nonwoven fabric 10 being supplied to steel mates between a pair concavo-convex roller 41,42 of knurling rolls 43, implements local elongation processing respectively to multiple positions of raw material nonwoven fabric 10.Specifically, in the pre-add Ministry of worker 4, as shown in Figure 5, between pair of rolls 41,42, clamp raw material nonwoven fabric 10, give damage to raw material nonwoven fabric 10.Between the formation fiber of nonwoven fabric, thermal welding is there is not from the view point of during imparting damage, preferably energetically the pair of rolls 41,42 of steel coupling knurling rolls 43 is not heated, or at temperature below the fusing point demonstrating the composition of minimum fusing point in the composition of fiber forming raw material nonwoven fabric 10, particularly carry out the embossing of steel coupling under than this fusing point also temperature of low more than 70 DEG C and process.
Next, as shown in Figure 5, utilize carrying roller 52,53 and the raw material nonwoven fabric 10 ' after implementing local elongation processing is supplied to the convex roller 51 being provided with protuberance 511 at periphery.In fluffing processing department 5, raw material nonwoven fabric 10 ' is supplied to convex roller, while make a part for the long fiber 2 of raw material nonwoven fabric 10 ' rupture, while stretch, thus be formed in the top fluffing of aggregate of fibers 11 and there is the fiber 20 being carried out the free end 20b stretched by the fiber forming aggregate of fibers 11, thus the nonwoven fabric 1 that the water-wetness forming the fiber 20 making this have free end 20b is lower than the water-wetness of the fiber forming aggregate of fibers 11.Specifically, utilize convex roller 51 to process the surface of raw material nonwoven fabric 10 ' after implementing local elongation processing, formed a part for long fiber 2 is ruptured, only an end 20a utilize the fiber 20 that the heat-fused portion 3 of nonwoven fabric is fixed.When forming fiber 20, the fiber 20 with free end 20b is stretched further compared with the fiber of the aggregate of fibers 11 forming the foundation part of not fluffing.By being so stretched, thus the water-wetness of the fiber 20 with free end 20b is made to become lower than the water-wetness of the fiber forming aggregate of fibers 11.From the view point of the fiber 20 formed efficiently shown in Fig. 1, preferably make the direction of rotation of convex roller 51 rotate along the opposite direction of the conveyance direction relative to raw material nonwoven fabric 10 ', preferably make convex roller 51 to be more than 0.3 times relative to the conveyance speed of raw material nonwoven fabric 10 ' and the speed of less than 10 times rotates.In addition, when making it circumferentially (clockwise direction relative to conveyance direction) rotating, preferably make convex roller 51 with more than 1.5 times and the speed of less than 20 times rotates.Herein, the speed of convex roller 51 refers to the peripheral speed on the periphery of convex roller 51.
More efficiently rupturing from the view point of making a part for long fiber 2, more efficiently forming the fiber 20 shown in Fig. 1, as shown in Figure 8, preferably the position of carrying roller 53 is set in the position higher than convex roller 51, impart the raw material nonwoven fabric 10 ' after damage with more than 10 ° and the wrap angle sigma of less than 180 ° contact with the contact surface of convex roller 51, because the width that nonwoven fabric 1 can be suppressed to cause because of contracting width reduces, thus the preferred wrap angle sigma with more than 30 ° less than 120 ° contacts further.
It should be noted that, when the two sides formation of nonwoven fabric 1 has fiber 20 of free end 20b, for from utilize convex roller 51 to process after different surface (back side), the surface of raw material nonwoven fabric 10 ', utilize other convex roller 51 to process further, can obtain thus.
Utilizing steel to mate knurling rolls 43 makes raw material nonwoven fabric 10 stretch partly, point of weakness is formed in the heat-fused portion 3 of raw material nonwoven fabric 10, then, utilize convex roller 51 that long fiber 2 is ruptured by the point of weakness in the most surface portion of the raw material nonwoven fabric 10 ' of heat-fused portion 3, form the fiber 21 that free end 20b is thicker.In addition, utilize convex roller 51 effects on surface to carry out adding man-hour, long fiber 2 ruptures each other in heat-fused portion 3,3, forms the fiber 22 that free end 20b is not thicker.In addition, utilize convex roller 51 that long fiber 2 is peeled off by the point of weakness of heat-fused portion 3, erect in the form of a ring each other in heat-fused portion 3,3 from the fiber of this heat-fused portion 3 stripping and become fibrae circulares 23.Utilize the suitable manufacturing methods of above-mentioned nonwoven fabric 1 and the nonwoven fabric that manufactures compared with the nonwoven fabric manufactured by the raising method utilized in the past, be characterised in that, the ratio of fibrae circulares 23, not thicker fiber 22 is little.The nonwoven fabric manufactured for utilizing the suitable manufacturing methods of above-mentioned nonwoven fabric 1, because the ratio of not thicker fiber 22 is little, therefore can keep fracture strength.
The water-wetness with the fiber 20 of free end 20b is lower than the water-wetness of the fiber forming aggregate of fibers 11, this is owing to utilizing the pre-add Ministry of worker 4 and fluffing processing department 5 to the hydrophilic material nonwoven fabric 10 that stretches, thus is stretched further compared with making fiber 20 and forming the fiber of aggregate of fibers 11.As mentioned above, be more than 0.1 % by weight and carry out hydrophilicity-imparting treatment in the scope of less than 20 % by weight to form hydrophilic material nonwoven fabric 10 relative to the weight of nonwoven fabric 1 in the amount of hydrophilic agent, utilize the pre-add Ministry of worker 4 and fluffing processing department 5 to change the water-wetness of this raw material nonwoven fabric 10, viewpoint is set out thus, the draw ratio of the fiber shown in following formula (8) is preferably more than 3% and less than 100%, and more preferably more than 5% and less than 50%.The draw ratio of fiber can be obtained in such a way.
(determination method of the draw ratio of fiber)
By the fiber footpath of the fiber footpath (equal with the fiber footpath of the fiber forming aggregate of fibers 11) of nonwoven fabric 1 before processing and the fiber 20 with free end 20b after processing to calculate the draw ratio of fiber.Assuming that produce based on the stretching of fiber be deformed into plastic deformation, assuming that the constant volume before and after processing.If the fiber footpath before processing is set to D μm, is set to Amm, the fiber footpath after processing is set to D ' μm by long for the fiber before processing, be set to A ' mm by long for the fiber after processing, then following formula (5) is set up.
(π/4)×D 2×A＝(π/4)×(D’) 2×A’···(5)
Draw ratio after processing can be grown by the fiber before and after processing and be utilized following formula (6) to represent.
The draw ratio (%) of fiber=[(A '/A)-1} × 100] (6)
By above-mentioned formula (5), fiber footpath D, D can be used ' and utilize following formula (7) to represent fiber long A, A ', based on formula (5), (7), the draw ratio of fiber can represent as shown in following formula (8).
A’/A＝(D/D’) 2···(7)
The draw ratio (%) of fiber=[(D '/D) 2-1} × 100] (8)
For action effect when using the nonwoven fabric 1 of embodiment of the invention described above, be described.
As shown in Figures 1 and 2, the nonwoven fabric 1 of present embodiment have long fiber 2 a part fracture, only an end 20a utilize the fiber 20 that heat-fused portion 3 is fixed, the other end becomes free end 20b and leave from the aggregate of fibers 11 of foundation part and erect.Therefore, have soft sense generally, resiliency improves, and skin sense of touch improves.In addition, nonwoven fabric 1 is formed by hydrophilic material nonwoven fabric 10, is therefore hydrophily, and a part for the long fiber 2 on surface fracture, therefore the liquid permeability of liquid improves.And, because the water-wetness with the fiber 20 of free end 20b is lower than the water-wetness of the fiber forming aggregate of fibers 11, thus by have the fiber 20 with free end 20b aggregate of fibers 11 surface and be difficult to the surface of liquid backflow to above-mentioned aggregate of fibers 11 is occurred by aggregate of fibers 11 by the liquid of aggregate of fibers 11.Like this, nonwoven fabric 1 is that resiliency is good and the liquid permeability of liquid good and the nonwoven fabric of liquid backflow not easily occurs.
If the fiber 20 with free end 20b relative to the contact angle of pure water not higher than 80 °, then more can embody above-mentioned effect, and for nonwoven fabric 1, in the fiber forming this nonwoven fabric 1, if fiber spacing from for more than 150 μm and the ratio more than 40% of the fiber of less than 300 μm, then more can embody above-mentioned effect.In addition, if the fiber 20 with free end 20b comprises the thicker fiber of free end 20b 21, then overall soft sense improves further, and skin sense of touch improves further.
The member of formation utilizing scope mainly to go in the absorbent commodity such as disposable diaper, sanitary napkin of nonwoven fabric 1.As member of formation, can enumerate such as: the sheet material etc. of the enclosure of surface patch, back sheet, formation disposable diaper, nonwoven fabric 1 especially goes for the surface patch of the absorbent commodity used in the skin abutment face of wearer.In addition, the scope that utilizes of nonwoven fabric 1 can also be applicable to cleaning sheet.Below, enumerating the disposable diaper that make use of nonwoven fabric 1 is example, specifically describes.
As shown in Figure 9 and Figure 10, pull-on disposable diaper 100 possesses the absorbent main body 50 comprising absorber 40 and the non-skin abutment face side being positioned at absorbent main body 50 and by enclosure 60 fixing for this absorbent main body 50.
As shown in Figure 10, absorbent main body 50 has the surface patch 70 of liquid permeability, the back sheet 80 of liquid impermeability (also comprising hydrophobicity) and is clipped in the absorber 40 of the liquid retainability between two panels 70,80, as shown in Figure 9, this absorbent main body 50 is actually lengthwise.
As shown in Figure 9, enclosure 60 have the dorsal part being configured at wearer drosal part A, be configured at veutro veutro portion B and between this drosal part A and veutro portion B, be configured in the crotch C of crotch part, dual-side edge 6a, 6b of drosal part A and veutro portion B are engaged with each other, and form a pair side seal portion (not shown), a pair leg opening part (not shown) and waist opening portion (not shown).In addition, the outer-skin sheet 62 that enclosure 60 has the outer surface forming diaper and the inner layer piece 61 being positioned at its skin abutment face side and locally engaging with this outer-skin sheet 62, between formation waist opening portion and the waist portion of leg opening part and the two panels 61,62 at leg 6d place, be configured with waist portion elastic component 63 and the leg elastic member 64 of rivel formation.
As shown in Figure 9, absorbent main body 50 is configured from the drosal part A of enclosure 60 across to veutro portion B, and the two-end part of the long side direction of absorbent main body 50 is in the both ends of the long side direction than enclosure 60 to the position that the inner side of long side direction retreats.As shown in Figure 10, for absorbent main body 50, utilize the bonding method based on bonding agent, heat seal, ultrasonic seal (ultrasonic seal) etc. that the non-skin abutment face of the back sheet 80 of absorbent main body 50 is engaged with the skin abutment face of the inner layer piece 61 of enclosure 60.
As shown in Figure 10, to be provided with by liquid impermeability or hydrophobicity in the both sides along long side direction of absorbability body 50 and the side direction ruffle 55,55 that forms of the material of aeration.Near the free end of each side direction ruffle 55, the elastic component 56 that side direction ruffle is formed is configured fixing with elongation state.When the wearing of diaper, edge-on of the free end of side direction ruffle (cuffs) 55, can stop excreta to flow out towards the width of absorbent main body 50.As shown in Figure 10, for side direction ruffle 55 formation sheet, the part 55a of the Rack outside the width of absorbent main body 50 is rolled into the non-skin abutment face side of absorber 40, and is fixed between absorber 40 and back sheet 80.It should be noted that, the part 55a of Rack also can be fixed between back sheet 30 and enclosure 60.
The nonwoven fabric 1 of present embodiment be preferred for the skin abutment face of wearer, the surface patch 70 of pull-on disposable diaper 100.In addition, outer-skin sheet 62 and inner layer piece 61, back sheet 80 and the side direction ruffle 55 formation sheet material of enclosure 60 can also be used as.For the component in each portion when not using nonwoven fabric 1, can be not particularly limited to use the component usually used in the absorbent commodities such as disposable diaper.Such as, the nonwoven fabric of liquid permeability, perforated film and their duplexer etc. can be used as surface patch 70, the duplexer etc. of resin film, resin film and nonwoven fabric can be used as back sheet 80.As side direction ruffle 55 formation sheet, the film of retractility, nonwoven fabric, textiles or their laminates etc. can be used.As inner layer piece 61 and outer-skin sheet 62, hydrophobic nonwoven fabric etc. can be used.
As absorber 40, can be not particularly limited to use the absorber etc. in the past used in the absorbent commodities such as disposable diaper.Such as absorber 40, can use: by the fiber assembly of the fibrous materials such as paper pulp or the object making wherein to support superabsorbent polymer, utilize the object etc. of the cladding material parcels such as the nonwoven fabric of cotton paper (tissue paper) or water permeability.
As elastic component 56, waist portion elastic component 63 and leg elastic member 64 that side direction ruffle is formed, the component etc. usually used in the absorbent commodities such as disposable diaper can be used without particular limitation.Such as, can use by natural rubber, polyurethane, polystyrene-poly isoprene copolymer, polystyrene-polybutadiene copolymer, the material etc. of the retractility that the polyethylene-alphaolefin copolymers such as ethyl acrylate-ethene etc. are formed.
If make the face having the fiber 20 with free end 20b of the nonwoven fabric 1 of present embodiment become the skin contact of the wearer of paper diaper type disposable diaper 100, and in this manner for surface patch 70, the soft sense that then surface patch 70 of disposable diaper 100 is overall improves, resiliency also improves, and skin sense of touch improves.In addition, because nonwoven fabric 1 is hydrophilic, so the body fluid of wearer is easily transferred to absorber 40 by nonwoven fabric 1, because the water-wetness with the fiber 20 of free end 20b is lower than the water-wetness of the fiber do not fluffed forming aggregate of fibers 11, so the body fluid being transferred to absorber 40 is difficult to the surface being back to above-mentioned aggregate of fibers 11 by aggregate of fibers 11.
Nonwoven fabric of the present invention by any restriction of the nonwoven fabric 1 of above-mentioned present embodiment, can suitably not change.
In addition, the manufacture method of nonwoven fabric of the present invention, not by any restriction of the manufacture method of above-mentioned embodiment, can suitably change.
Such as, in the manufacture method of the nonwoven fabric 1 of above-mentioned present embodiment, except using the raw material nonwoven fabric 10 that obtained by heat-treating with the temperature of the fusing point lower than fiber of carrying out of other operation, also can enforcement local elongation processing before, to raw material nonwoven fabric 10 with lower than is formed this raw material nonwoven fabric 10 fiber fusing point temperature enforcement heat treatment.Specifically, also can in the manufacturing installation of nonwoven fabric 1, at the upstream side of local elongation processing department 4, hot blast handling part is set, the raw material nonwoven fabric 10 after heat-treating utilizing this hot blast handling part continuously to the steel of local elongation processing department 4 coupling knurling rolls 43 pair of rolls 41,42 between carrying and implement local elongation processing.By implementing heat treatment and local elongation is processed in a series of like this flow process, can realize manufacturing the effect of the nonwoven fabric 1 that skin sense of touch performance and absorbent properties are further enhanced.
About above-mentioned embodiment, further following nonwoven fabric and manufacture method are disclosed.
<1>
A kind of nonwoven fabric, it possesses to utilize heat-fused portion to be fixed by long fiber and the hydrophilic non-woven of aggregate of fibers that obtains, wherein,
Described long stapled part fracture, an end utilizes described heat-fused portion to be fixed, and the other end becomes free end and leaves from described aggregate of fibers and erect, and described nonwoven fabric possesses the fiber with this free end,
The water-wetness with the fiber of described free end is lower than the water-wetness of the fiber forming described aggregate of fibers.
<2>
Nonwoven fabric described in above-mentioned <1>, wherein, the fiber with described free end is greater than 80 ° relative to the contact angle of pure water.
<3>
Nonwoven fabric described in above-mentioned <1> or <2>, wherein, the fiber with described free end (20b) is preferably greater than 80 ° relative to the contact angle of pure water, be preferably greater than 85 ° further, if more than 90 ° then particularly preferably.
<4>
Nonwoven fabric according to any one of above-mentioned <1> ~ <3>, wherein, the fiber forming described aggregate of fibers is preferably less than 90 ° relative to the contact angle of pure water, preferably be less than 85 ° further, if less than 80 ° then particularly preferably.
<5>
Nonwoven fabric according to any one of above-mentioned <1> ~ <4>, wherein, relative to the contact angle of the fiber of the described aggregate of fibers of formation, the contact angle with the fiber of described free end (20b) preferably exceeds more than 5 °, more preferably exceeds more than 10 °.
<6>
Nonwoven fabric according to any one of above-mentioned <1> ~ <5>, wherein, in described nonwoven fabric, in the fiber forming described nonwoven fabric, fiber spacing is from for more than 150 μm and the ratio of the fiber of less than 300 μm is more than 30%.
<7>
Nonwoven fabric according to any one of above-mentioned <1> ~ <6>, wherein, in the fiber forming described nonwoven fabric, fiber spacing is from for more than 150 μm and the ratio of the fiber of less than 300 μm is preferably more than 30%, more preferably more than 35%, be particularly preferably more than 40%.
<8>
Nonwoven fabric according to any one of above-mentioned <1> ~ <7>, wherein, described nonwoven fabric possesses the fiber of fluffing, and the fiber of described fluffing comprises the fiber with described free end and erects fibrae circulares circlewise each other in described heat-fused portion.
<9>
Nonwoven fabric according to any one of above-mentioned <1> ~ <8>, wherein, the radical of the fiber of the fluffing of described nonwoven fabric is 8/more than cm and fluffing is highly below 1.5mm.
<10>
Nonwoven fabric described in above-mentioned <9>, wherein, the radical of the fiber of described fluffing is preferably 8/more than cm, is more preferably 12/more than cm, and is 100/below cm, is more preferably 40/below cm.
<11>
Nonwoven fabric described in above-mentioned <9> or <10>, wherein, the fluffing of the fiber of above-mentioned fluffing is highly preferably more than 0.2mm, more preferably more than 0.5mm, and is preferably below 1.0mm.
<12>
Nonwoven fabric according to any one of above-mentioned <1> ~ <11>, wherein, the fiber with described free end comprises the thicker fiber of the described free end of side, described the other end.
<13>
Nonwoven fabric described in above-mentioned <12>, wherein, the ratio of the fiber that described free end is thicker is preferably more than 20%, and more preferably more than 30%, be particularly preferably more than 40%.
<14>
Nonwoven fabric according to any one of above-mentioned <1> ~ <13>, wherein, the average fiber footpath with the fiber of described free end is less than the average fiber footpath of the fiber forming described aggregate of fibers.
<15>
Nonwoven fabric according to any one of above-mentioned <1> ~ <14>, wherein, the average fiber footpath with the fiber of described free end be preferably the average fiber footpath of the fiber forming aggregate of fibers less than 98% and more than 40%, be less than 97% and more than 70%.
<16>
Nonwoven fabric according to any one of above-mentioned <8> ~ <15>, wherein, the average fiber footpath of the fiber of described fluffing is less than the average fiber footpath of the above-mentioned fiber do not fluffed.
<17>
Nonwoven fabric according to any one of above-mentioned <8> ~ <16>, wherein, the average fiber footpath of the fiber preferably do not fluffed in the average fiber footpath of the fiber of described fluffing less than 98% and more than 40%, be less than 97% and more than 70%.
<18>
Nonwoven fabric according to any one of above-mentioned <1> ~ <17>, wherein, the Compression characteristics of described nonwoven fabric when small load is 17.6 (cN/cm 2)/below mm, the fracture strength of described nonwoven fabric on the direction orthogonal with described long stapled differently-oriented directivity is more than 5.00N/5cm, and the weight per unit area of described nonwoven fabric is 5g/m 2above and 100g/m 2below.
<19>
Nonwoven fabric described in above-mentioned <18>, wherein, described Compression characteristics is 17.6 (cN/cm 2)/below mm, is preferably 14.7 (cN/cm 2)/below mm, more preferably 9.80 (cN/cm 2)/below mm.
<20>
Nonwoven fabric according to any one of above-mentioned <1> ~ <19>, wherein, the value of the fracture strength of described nonwoven fabric is preferably more than 5.0N/50mm, more preferably more than 8.0N/50mm and below 30.0N/50mm.
<21>
Nonwoven fabric according to any one of above-mentioned <1> ~ <20>, wherein, the raw material nonwoven fabric of described nonwoven fabric is formed by carrying out hydrophilicity-imparting treatment to hydrophobic long fiber.
<22>
Nonwoven fabric described in above-mentioned <21>, wherein, makes the hydrophiling of described raw material nonwoven fabric by hydrophilic agent, and the amount of this hydrophilic agent is more than 0.1 % by weight relative to the weight of described raw material nonwoven fabric and less than 20 % by weight.
<23>
Nonwoven fabric according to any one of above-mentioned <1> ~ <22>, wherein, described nonwoven fabric has the aggregate of fibers that the fiber do not fluffed except the fiber except having described free end, the fiber of described ring-type and the fiber of fluffing is formed.
<24>
Nonwoven fabric according to any one of above-mentioned <1> ~ <23>, wherein, the loose pliability of described nonwoven fabric is preferably below 10cN, more preferably below 5.9cN, and is preferably more than 0.5cN.
<25>
Nonwoven fabric according to any one of above-mentioned <1> ~ <24>, wherein, the loose pliability of described raw material nonwoven fabric is preferably below 15cN, more preferably below 10cN, and be preferably more than 3cN, more preferably more than 5cN.
<26>
The manufacture method of the nonwoven fabric according to any one of above-mentioned <1> ~ <25>,
The manufacture method of this nonwoven fabric is:
Utilize heat-fused portion to be fixed by long fiber by possessing and the hydrophilic non-woven after hydrophilicity-imparting treatment of aggregate of fibers that obtains is supplied between a pair concavo-convex roller, local elongation processing implemented respectively to multiple positions of this nonwoven fabric,
Nonwoven fabric after implementing local elongation processing is supplied to the convex roller at periphery with protuberance, while make described long stapled part fracture limit stretch, thus fluff from described aggregate of fibers, form the fiber with free end be stretched further than the fiber forming described aggregate of fibers, the water-wetness making this have the fiber of free end is lower than the water-wetness of the fiber do not fluffed forming this aggregate of fibers.
<27>
The manufacture method of the nonwoven fabric described in above-mentioned <26>, wherein, described local elongation processing use a pair concavo-convex roller carries out,
A roller has multiple protuberance at periphery, and another roller has the recess that this protuberance can be filled in the position corresponding with the described protuberance of a described roller of periphery,
The depth of engagement of the protuberance of a described roller and the protuberance of roller described in another is more than 3.5mm and below 10mm.
<28>
The manufacture method of the nonwoven fabric described in above-mentioned <26> or <27>, wherein, the described depth of engagement is more than 3.5mm, be preferably more than 3.7mm, more preferably more than 4mm, and be below 5mm, be preferably below 4.8mm, more preferably below 4.5mm.
<29>
The manufacture method of the nonwoven fabric according to any one of above-mentioned <26> ~ <28>, wherein, use sandblasting roller as convex roller in described fluffing processing, the density of the protuberance of sandblasting roller is 1000/cm 2above and 3000/cm 2below.
<30>
The manufacture method of the nonwoven fabric described in above-mentioned <29>, wherein, the density of the protuberance of described sandblasting roller is preferably 1000/cm 2above and 3000/cm 2below, more preferably 1200/cm 2above and 2500/cm 2below.
<31>
The manufacture method of the nonwoven fabric according to any one of above-mentioned <26> ~ <30>, wherein, the draw ratio of fiber is preferably more than 3% and less than 100%, and more preferably more than 5% and less than 50%.
<32>
A kind of absorbent commodity, wherein, is used for surface patch by the nonwoven fabric according to any one of above-mentioned <1> ~ <25>.
<33>
A kind of disposable diaper, it absorber possessing surface patch, back sheet and clamped by two panels, described surface patch employs the nonwoven fabric described in above-mentioned <1> ~ <25>.
Embodiment
Below, the present invention is further described by embodiment.But scope of the present invention does not limit by described embodiment.
[embodiment 1]
As raw material nonwoven fabric, the have three layers layer of the spun-bonded nonwoven fabric be made up of homopolymer of polypropylene, weight per unit area of tool is used to be 18g/m 2, fibre diameter is 16 μm, the area occupation ratio of thermo-compressed portion (heat-fused portion based on embossing) is 9%, add hydrophilic agent 1 % by weight carries out the spun-bonded nonwoven fabric after hydrophilicity-imparting treatment (SSS nonwoven fabric).The loose pliability of this nonwoven fabric is 9.6cN.Use this nonwoven fabric, carry out local elongation processing and fluffing processing to manufacture nonwoven fabric.As local elongation processing, use steel coupling knurling rolls 43 (ス チ mono-Le マ Star チ Application ゲ エ Application ボ ス ロ mono-ラ 43).The height of each protuberance 411,421 in this roller 43 is 5.0mm, and each protuberance 411 of roller 41 is 4.0mm with the degree of depth D engaged of each protuberance 421 of roller 42.In addition, adjacent on rotating shaft direction protuberance 411,421 distance (spacing P each other 2) be 7mm, protuberance 411,421 distance (spacing P each other adjacent in a circumferential direction 1) be 7mm.Carry out at the temperature of steel coupling knurling rolls 43 is 26 DEG C, the peripheral speed of steel coupling knurling rolls 43 is 20m/min, and the conveyance speed of raw material nonwoven fabric is 20m/min.Then, for the convex roller 51 of fluffing processing, use the height of each protuberance 511 be 0.2mm, protuberance density for about 2000/cm 2sandblasting roller.The conveyance speed of raw material nonwoven fabric is 20m/min, with the peripheral speed of 2 times, convex roller 51 is rotated in the reverse direction relative to the conveyance direction of nonwoven fabric.Cornerite is 60 degree.Surface patch is removed from the goods of " Merries (registration mark) the Merries Pants " of Kao Corp, replace the nonwoven fabric using and manufacture in a manner described, according to the mode making the face of the fiber with fluffing become the side contacted with the skin side of wearer, make the disposable diaper of embodiment 1.
[embodiment 2]
In embodiment 1, after carrying out local elongation processing, the sandblasting roller as the convex roller 51 for processing of fluffing is rotated in the reverse direction with the peripheral speed of 4 times relative to the conveyance direction of nonwoven fabric.In addition, similarly to Example 1, the disposable diaper of embodiment 2 has been made.
[embodiment 3]
In embodiment 1, the each protuberance 411 of roller 41 be used in the steel coupling knurling rolls 43 of local elongation processing is set to 3.5mm with the degree of depth D engaged of each protuberance 421 of roller 42, the sandblasting roller as the convex roller 51 for fluffing is rotated with the peripheral speed of 2 times in the reverse direction relative to the conveyance direction of nonwoven fabric.In addition, similarly to Example 1, the disposable diaper of embodiment 3 has been made.
[embodiment 4]
In embodiment 1, the each protuberance 411 of roller 41 be used in the steel coupling knurling rolls 43 of local elongation processing is set to 4.5mm with the degree of depth D engaged of each protuberance 421 of roller 42, the sandblasting roller as the convex roller 51 for fluffing is rotated with the peripheral speed of 2 times in the reverse direction relative to the conveyance direction of nonwoven fabric.In addition, similarly to Example 1, the disposable diaper of embodiment 4 has been made.
[embodiment 5]
The have three layers layer of the spun-bonded nonwoven fabric be made up of homopolymer of polypropylene, weight per unit area of tool is used to be 17g/m 2, fibre diameter is 15 μm, the area occupation ratio of thermo-compressed portion (heat-fused portion based on embossing) is 17%, add hydrophilic agent 1 % by weight carries out the spun-bonded nonwoven fabric after hydrophilicity-imparting treatment (SSS nonwoven fabric).The loose pliability of this nonwoven fabric is 5.0cN.Use this nonwoven fabric, the each protuberance 411 of roller 41 be used in the steel coupling knurling rolls 43 of local elongation processing is set to 4.5mm with the degree of depth D engaged of each protuberance 421 of roller 42, the sandblasting roller as the convex roller 51 for fluffing is rotated with the peripheral speed of 4 times in the reverse direction relative to the conveyance direction of nonwoven fabric.In addition, similarly to Example 1, the disposable diaper of embodiment 5 has been made.
[embodiment 6]
The have three layers layer of the spun-bonded nonwoven fabric be made up of homopolymer of polypropylene, weight per unit area of tool is used to be 17g/m 2, fibre diameter is 16 μm, the area occupation ratio of thermo-compressed portion (heat-fused portion based on embossing) is 17%, add hydrophilic agent 1 % by weight carries out the spun-bonded nonwoven fabric after hydrophilicity-imparting treatment (SSS nonwoven fabric).The loose pliability of this nonwoven fabric is 12cN.Use this nonwoven fabric, the each protuberance 411 of roller 41 be used in the steel coupling knurling rolls 43 of local elongation processing is set to 4.5mm with the degree of depth D engaged of each protuberance 421 of roller 42, the sandblasting roller as the convex roller 51 for fluffing is rotated with the peripheral speed of 4 times in the reverse direction relative to the conveyance direction of nonwoven fabric.In addition, similarly to Example 1, the disposable diaper of embodiment 5 has been made.
[reference example 1]
In embodiment 1, the each protuberance 411 of roller 41 be used in the steel coupling knurling rolls 43 of local elongation processing is set to 2.7mm with the degree of depth D engaged of each protuberance 421 of roller 42, the sandblasting roller as the convex roller 51 for fluffing is rotated with the peripheral speed of 2 times in the reverse direction relative to the conveyance direction of nonwoven fabric.In addition, the disposable diaper of reference example 1 has been made similarly to Example 1.
[comparative example 1]
Use the raw material nonwoven fabric used in embodiment 1 to replace the surface patch removed from the goods of " Merries (registration mark) the Merries Pants " of Kao Corp, make the disposable diaper of comparative example 1.
[comparative example 2]
The have three layers layer of the spun-bonded nonwoven fabric be made up of homopolymer of polypropylene, weight per unit area of tool is used to be 18g/m 2, fibre diameter is 16 μm, the area occupation ratio of thermo-compressed portion (heat-fused portion based on embossing) is 9%, does not carry out the spun-bonded nonwoven fabric of hydrophilicity-imparting treatment (nonwoven fabric not carrying out hydrophilicity-imparting treatment of the raw material nonwoven fabric used in embodiment 1), replace the surface patch removed from the goods of " Merries (registration mark) the Merries Pants " of Kao Corp, make the disposable diaper of comparative example 2.
[performance evaluation]
For the nonwoven fabric of the surface patch of the disposable diaper for embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, according to the determination method of the determination method of above-mentioned loose pliability, above-mentioned contact angle, above-mentioned fiber spacing from determination method, the determination method of above-mentioned fracture strength, above-mentioned small load time determination method, the determination method in above-mentioned fiber footpath, the determination method of distribution in above-mentioned fiber footpath, the radical of the fiber of above-mentioned fluffing determination method, measure respectively.Their result is shown in following table 1.
In addition, for the nonwoven fabric of the surface patch of the disposable diaper for embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, by the following method, have rated skin touch sensitivity.Evaluating environment is room temperature 22 DEG C, humidity 65%RH.Their result is shown in following table 1.
In addition, for the disposable diaper of embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, by the following method, absorbability, liquid backflow is evaluated respectively.Evaluating environment is room temperature 22 DEG C, humidity 65%RH.Their result is shown in following table 1.
[evaluation that skin is touch sensitivity]
For the nonwoven fabric of the surface patch of the disposable diaper for embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, specialized review person 10 people to the nonwoven fabric of comparative example 1 for 10 grades time benchmark (5 points) are (more close to 10 points, skin sense of touch is better) the skin sense of touch (smoothness) of nonwoven surface carry out sensory evaluation, and, for each nonwoven fabric, be rounded up to integer-bit and obtain the mean value of 3.
[absorbefacient evaluation]
Remove waist rivel and leg rivel from the disposable diaper of embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, with deployed condition, surface patch side is fixed upward and flatly.On surface patch, the acrylic compounds plate of the inlet that mounting band is cylindric, further on acrylic compounds plate, loads the counterweight of 2kg respectively to load load in the drosal part side of diaper and abdomen lateral side.Cylinder (height 53mm) shape of the inlet being arranged at acrylic compounds plate to be internal diameter be 36mm, on acrylic compounds plate, in the position of 1/3 of long side direction and on the position time at the center of width, formed the through hole of the internal diameter 36mm be communicated with between the inside of this cylindric inlet and the surface patch opposed faces of acrylic compounds plate, wherein, the center of the inlet of this cylindrical shape and the axis of through hole consistent.According to the central shaft of the cylindric inlet of acrylic compounds plate be positioned at that the absorbent core of diaper covers by distance by the front end of the end of the long side direction abdomen lateral side of cover be 125mm position on mode, configure acrylic compounds plate, and the physiological saline of total injection 160g.Physiological saline divides 4 injections with 10 minutes each 40g in interval.Measure 160g total amount by the time till diaper absorbent.For each disposable diaper, 3 mean values are rounded up to integer-bit, measure soak time.Their result is shown in following table 1.
[evaluation of liquid backflow]
Then above-mentioned absorbefacient evaluation, the physiological saline of total injection 160g in the disposable diaper of embodiment 1 ~ 6, reference example 1, comparative example 1 ~ 2, and state starts standing 10 minutes thus.Then, take down acrylic compounds plate, stacked 16 Toyo Roshi Kaisha on the absorption site of physiological saline, the filter paper of the 5C of Ltd, load load 2 minutes in the above further, physiological saline is absorbed by filter paper.Load loads according to the mode area of 10cm × 10cm being applied to 3.5kg.Elimination capacity after 2 minutes, measures the weight of the filter paper after absorbing physiological saline.From this weight, deduct the weight of the filter paper before absorption, obtain the liquid backflow amount of this value as each diaper.For each disposable diaper, 3 mean values are rounded up to integer-bit, determine liquid backflow amount.Their result is shown in following table 1.
[table 1]
Result as shown in Table 1 can clearly be learnt, for the nonwoven fabric of embodiment 1 ~ 6, compared with the nonwoven fabric of comparative example 1, the water-wetness that there occurs the fiber of fluffing by processing becomes hydrophobic, and absorbability, liquid backflow improve.And the nonwoven fabric of known embodiment 1 ~ 6 is compared with the nonwoven fabric of comparative example 1 ~ 2, and resiliency is high.Therefore, the nonwoven fabric of known embodiment 1 ~ 6, compared with the nonwoven fabric of comparative example 1 ~ 2, is that resiliency improves, the liquid permeability of liquid improves and the nonwoven fabric that liquid is not easily refluxed.
Utilizability in industry
According to nonwoven fabric of the present invention, resiliency improves, the liquid permeability of liquid improves, and liquid not easily refluxes.

Claims (33)

1. a nonwoven fabric, it possesses to utilize heat-fused portion to be fixed by long fiber and the hydrophilic non-woven of the aggregate of fibers obtained, wherein,
Described long stapled part fracture, an end utilizes described heat-fused portion to be fixed, and the other end becomes free end and leaves from described aggregate of fibers and erect, and described nonwoven fabric possesses the fiber with this free end,
The water-wetness with the fiber of described free end is lower than the water-wetness of the fiber forming described aggregate of fibers.
2. nonwoven fabric as claimed in claim 1, wherein, the fiber with described free end is greater than 80 ° relative to the contact angle of pure water.
3. nonwoven fabric as claimed in claim 1 or 2, wherein, the fiber with described free end (20b) is greater than 80 ° or be greater than 85 ° or be more than 90 ° relative to the contact angle of pure water.
4. the nonwoven fabric according to any one of claims 1 to 3, wherein, the fiber forming described aggregate of fibers is less than 90 ° or be less than 85 ° or be less than 80 ° relative to the contact angle of pure water.
5. the nonwoven fabric according to any one of Claims 1 to 4, wherein, the contact angle with the fiber of described free end (20b) exceeds more than 5 ° relative to the contact angle of the fiber forming described aggregate of fibers, or exceeds more than 10 °.
6. the nonwoven fabric according to any one of Claims 1 to 5, wherein, in described nonwoven fabric, in the fiber forming described nonwoven fabric, fiber spacing is from for more than 150 μm and the ratio of the fiber of less than 300 μm is more than 30%.
7. the nonwoven fabric according to any one of claim 1 ~ 6, wherein, in the fiber forming described nonwoven fabric, fiber spacing is from for more than 150 μm and the ratio of the fiber of less than 300 μm is more than 30%, more than 35% or more than 40%.
8. the nonwoven fabric according to any one of claim 1 ~ 7, wherein, described nonwoven fabric possesses the fiber of fluffing, and the fiber of described fluffing comprises the fiber with described free end and erects fibrae circulares circlewise each other in described heat-fused portion.
9. the nonwoven fabric according to any one of claim 1 ~ 8, wherein, the radical of the fiber of the fluffing of described nonwoven fabric is 8/more than cm and fluffing is highly below 1.5mm.
10. nonwoven fabric as claimed in claim 9, wherein, the radical of the fiber of described fluffing is 8/more than cm or 12/more than cm, and is 100/below cm or 40/below cm.
11. nonwoven fabric as described in claim 9 or 10, wherein, the fluffing of the fiber of described fluffing is highly more than 0.2mm or more than 0.5mm, and is below 1.0mm.
12. nonwoven fabric according to any one of claim 1 ~ 11, wherein, the fiber with described free end comprises the thicker fiber of the described free end of side, described the other end.
13. nonwoven fabric as claimed in claim 12, wherein, the ratio of the fiber that described free end is thicker is more than 20% or more than 30% or more than 40%.
14. nonwoven fabric according to any one of claim 1 ~ 13, wherein, the average fiber footpath with the fiber of described free end is less than the average fiber footpath of the fiber forming described aggregate of fibers.
15. nonwoven fabric according to any one of claim 1 ~ 14, wherein, the average fiber footpath with the fiber of described free end be the average fiber footpath of the fiber forming aggregate of fibers less than 98% and more than 40% or less than 97% and more than 70%.
16. nonwoven fabric as claimed in claim 8, wherein, the average fiber footpath of the fiber of described fluffing is less than the average fiber footpath of the described fiber do not fluffed.
17. nonwoven fabric as claimed in claim 8, wherein, the average fiber footpath of the fiber of described fluffing be the average fiber footpath of the fiber do not fluffed less than 98% and more than 40% or less than 97% and more than 70%.
18. nonwoven fabric according to any one of claim 1 ~ 17, wherein, the Compression characteristics of described nonwoven fabric when small load is 17.6 (cN/cm 2)/below mm, the fracture strength of described nonwoven fabric on the direction orthogonal with described long stapled differently-oriented directivity is more than 5.00N/5cm, and the weight per unit area of described nonwoven fabric is 5g/m 2above and 100g/m 2below.
19. nonwoven fabric as claimed in claim 18, wherein, described Compression characteristics is 17.6 (cN/cm 2)/below mm or 14.7 (cN/cm 2)/below mm or 9.80 (cN/cm 2)/below mm.
20. nonwoven fabric according to any one of claim 1 ~ 19, wherein, the value of the fracture strength of described nonwoven fabric is more than 5.0N/50mm, or is more than 8.0N/50mm and below 30.0N/50mm.
21. nonwoven fabric according to any one of claim 1 ~ 20, wherein, the raw material nonwoven fabric of described nonwoven fabric is formed by carrying out hydrophilicity-imparting treatment to hydrophobic long fiber.
22. nonwoven fabric as claimed in claim 21, wherein, make the hydrophiling of described raw material nonwoven fabric by hydrophilic agent, and the amount of this hydrophilic agent is more than 0.1 % by weight relative to the weight of described raw material nonwoven fabric and less than 20 % by weight.
23. nonwoven fabric according to any one of claim 1 ~ 22, wherein, described nonwoven fabric has the aggregate of fibers that the fiber do not fluffed except the fiber except having described free end, the fiber of described ring-type and the fiber of fluffing is formed.
24. nonwoven fabric according to any one of claim 1 ~ 23, wherein, the loose pliability of described nonwoven fabric is below 10cN or below 5.9cN, and is more than 0.5cN.
25. nonwoven fabric according to any one of claim 1 ~ 24, wherein, the loose pliability of described raw material nonwoven fabric is below 15cN or below 10cN, and is more than 3cN or more than 5cN.
The manufacture method of the nonwoven fabric according to any one of 26. 1 kinds of claims 1 ~ 25,
The manufacture method of this nonwoven fabric is:
Utilize heat-fused portion to be fixed by long fiber by possessing and the hydrophilic non-woven after hydrophilicity-imparting treatment of aggregate of fibers that obtains is supplied between a pair concavo-convex roller, local elongation processing implemented respectively to multiple positions of this nonwoven fabric,
Nonwoven fabric after implementing local elongation processing is supplied to the convex roller at periphery with protuberance, while make described long stapled part fracture limit stretch, thus fluff from described aggregate of fibers, form the fiber with free end be stretched further than the fiber forming described aggregate of fibers, the water-wetness making this have the fiber of free end is lower than the water-wetness of the fiber do not fluffed forming this aggregate of fibers.
The manufacture method of 27. nonwoven fabric as claimed in claim 26, wherein, described local elongation processing use a pair concavo-convex roller carries out,
A roller has multiple protuberance at periphery, and another roller has the recess that this protuberance can be filled in the position corresponding with the described protuberance of a described roller of periphery,
The depth of engagement of the protuberance of a described roller and the protuberance of roller described in another is more than 3.5mm and below 10mm.
The manufacture method of 28. nonwoven fabric as described in claim 26 or 27, wherein, the described depth of engagement is more than 3.5mm or more than 3.7mm or more than 4mm, and is below 5mm or below 4.8mm or below 4.5mm.
The manufacture method of 29. nonwoven fabric according to any one of claim 26 ~ 28, wherein, use sandblasting roller as convex roller in described fluffing processing, the density of the protuberance of sandblasting roller is 1000/cm 2above and 3000/cm 2below.
The manufacture method of 30. nonwoven fabric as claimed in claim 29, wherein, the density of the protuberance of described sandblasting roller is 1000/cm 2above and 3000/cm 2below or 1200/cm 2above and 2500/cm 2below.
The manufacture method of 31. nonwoven fabric according to any one of claim 26 ~ 30, wherein, the draw ratio of fiber is more than 3% and less than 100% or more than 5% and less than 50%.
32. 1 kinds of absorbent commodities, wherein, are used for surface patch by the nonwoven fabric according to any one of claim 1 ~ 25.
33. 1 kinds of disposable diapers, it absorber possessing surface patch, back sheet and clamped by two panels, described surface patch employs the nonwoven fabric according to any one of claim 1 ~ 25.
CN201380026230.9A 2012-12-19 2013-11-28 Nonwoven fabric Active CN104334784B (en)

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