以下,對本發明之實施形態加以詳細敍述。 本實施形態之不織布包含熱塑性纖維,可為藉由紡黏法製造之長纖維不織布、由梳棉法等製造之短纖維不織布。然而,於短纖維不織布之情形時,進行梳棉時纖維於X方向或Y方向被拉齊,表面容易變得平滑,就該情況、強度、生產性之觀點、減少對肌膚之刺激等觀點而言,作為構成織物之纖維,較佳為藉由紡黏法製造之長纖維。本案說明書中,所謂長纖維係指纖維長度為55 mm以上者。纖維長度越短,則纖維之端部分接觸肌膚之概率越大,因此給予紮刺之觸感,故纖維長度較佳為55 mm以上。 作為構成熱塑性纖維之熱塑性樹脂,例如可列舉:聚乙烯、聚丙烯、共聚合聚丙烯等聚烯烴系樹脂,聚對苯二甲酸乙二酯、聚對苯二甲酸丁二酯、聚萘二甲酸乙二酯、共聚合聚酯等聚酯系樹脂,尼龍-6、尼龍-66、共聚合尼龍等聚醯胺系樹脂,及聚乳酸、聚丁二酸丁二酯、聚丁二酸乙二酯等生物降解性樹脂,並無特別限定。就不織布之質感之觀點、所使用之用途多數為拋棄型材料之情況而言,就通用、回收之便利性之觀點而言,較佳為聚烯烴系樹脂。 作為熱塑性纖維之形態,就對不織布之表面結構賦予特徵之觀點而言,較佳為纖維捲縮。捲縮數較佳為5個/2.54 cm(吋)以上,更佳為5個/吋以上且45個/吋以下,進而較佳為10個/吋以上且40個/吋以下,尤佳為10個/吋以上且25個/吋以下。若為由捲縮數超過45個/吋之纖維構成之不織布,則纖維之捲縮所致之縮短或不均較顯眼,導致不織布之外觀變差,此外因不均而導致回滲指數變差。又,若為由捲縮數未達5個/吋之纖維構成之不織布,則無法獲得所需之表面粗糙度,而且厚度變薄,質感受損,或者難以獲得所需之透水性。 作為對上述纖維賦予捲縮之方法,可藉由將纖維截面設為異形截面形狀並於紡絲冷卻時偏冷卻而賦予捲縮。又,包含2種以上之熱塑性樹脂之複合纖維亦可表現出捲縮,藉由將其構成設為並列型(S/S)、偏芯鞘芯型(偏S/C)等,可進而容易地表現出捲縮。於偏芯鞘芯型(偏S/C)之情形時,芯部亦可於纖維表面露出,芯部於纖維表面中所占之比率以面積率計較佳為0~50%,更佳為0~30%。若芯部於纖維表面中所占之比率高至超過50%,則會影響作為不織布之接合時之接著,布強度容易降低,亦容易產生起毛。 於偏芯鞘芯型(偏S/C)之情形時,為了獲得所需之捲縮數,芯部之截面積之重心較佳為相對於複合纖維之截面積之重心而偏移5~40%。芯部之偏移係藉由下式算出。 芯部之偏移(%)=(複合纖維之截面積之重心與芯部之截面積之重心之最短距離)/(線之直徑)×100 於上述纖維係由2種以上之熱塑性樹脂組合而成之情形時,只要可發揮所需之效果,則可為上述熱塑性樹脂之任意組合,就纖維彼此之接合之觀點而言,較佳為存在熔點差之熱塑性樹脂之組合。熔點差較高之樹脂於纖維內所占之重量比率較佳為20 wt%以上且80 wt%以下,更佳為30 wt%以上且80 wt%以下,進而較佳為50 wt%以上且70 wt%以下。 又,就所獲得之不織布之質感之觀點而言,較佳為聚烯烴系樹脂彼此之組合、將聚烯烴系樹脂與聚酯系樹脂組合而使用。於將聚烯烴系樹脂組合而使用之情形時,可列舉由聚乙烯、聚丙烯、及該等之單體與其他α-烯烴之共聚物等樹脂組合而成之複合纖維。其他α-烯烴為碳數3~10者,具體而言可列舉丙烯、1-丁烯、1-戊烯、1-己烯、4-甲基-1-戊烯、1-辛烯等。 於將聚烯烴系樹脂與聚酯系樹脂組合之情形時,聚酯系樹脂較佳為使用聚對苯二甲酸乙二酯單一成分,或者使用包含間苯二甲酸等之共聚物。又,聚對苯二甲酸乙二酯亦可藉由摻合物等而改質,亦可賦予有添加劑等。 其中,作為熱塑性樹脂之組合,就強度較強而於使用時不易斷裂,且生產衛生材料時之加工適性優異,另外質感亦良好之方面而言,較佳為將第1成分設為聚丙烯,將第2成分設為聚乙烯,於複合纖維為偏芯鞘芯型之情形時,較佳為將芯部設為第1成分,將鞘部設為第2成分。 於由上述2種熱塑性樹脂形成纖維之情形時,第1成分之聚丙烯可為藉由通常之齊格勒-納塔觸媒所合成之聚合物,亦可為藉由茂金屬所代表之單點活性觸媒所合成之聚合物。又,亦可為乙烯無規共聚合聚丙烯。該等可單獨使用1種,亦可將2種以上組合。尤其就質感、強度、尺寸穩定性而言,較佳為以均聚丙烯作為主成分者。 又,就製造纖維時之紡絲性、所獲得之纖維之強度之方面而言,作為聚丙烯之MFR(melt mass flow rate,熔體質量流率),下限較佳為20 g/10 min以上,更佳為超過30 g/10 min,進而較佳為超過40 g/10 min,最佳為超過53 g/10 min。MFR之上限較佳為85 g/10 min以下,更佳為70 g/10 min以下,進而較佳為60 g/10 min以下。MFR係按照JIS-K7210「塑膠-熱塑性塑膠之熔體質量流率(MFR)及熔體容量流率(MVR,melt volume flow rate)之試驗方法」之表1、試驗溫度230℃、試驗荷重2.16 kg而進行測定。 於由上述2種熱塑性樹脂形成纖維之情形時,第2成分之聚乙烯可為藉由通常之齊格勒-納塔觸媒所合成之聚合物,亦可為藉由茂金屬所代表之單點活性觸媒所合成之聚合物。聚乙烯較佳為高密度聚乙烯、直鏈狀低密度聚乙烯,密度較佳為0.92~0.97 g/cm3
,更佳為0.925~0.96 g/cm3
。 又,就製造纖維時之紡絲性之觀點而言,聚乙烯之MI(Melt Index,熔融指數)之下限較佳為10 g/10 min以上,更佳為超過15 g/10 min。MI之上限較佳為100 g/10 min以下,更佳為60 g/10 min以下,進而較佳為40 g/10 min以下。MI係按照JIS-K7210「塑膠-熱塑性塑膠之熔體質量流率(MFR)及熔體容量流率(MVR)之試驗方法」之表1、試驗溫度190℃、試驗荷重2.16 kg而進行測定。 又,於使用聚酯系樹脂之情形時,溶液黏度ηsp/c之下限較佳為0.2以上,更佳為0.6以上。溶液黏度ηsp/c之上限較佳為0.9以下,更佳為0.8以下。 就強度、生產性之觀點而言,構成本實施形態之不織布之纖維較佳為使用紡黏法而成之長纖維之織物形態。於製成與2種以上之熱塑性樹脂組合而成之複合長纖維之情形時,例如自2台以上之不同之擠出機分別熔融擠出不同之熱塑性樹脂,自具有多數個紡絲孔之紡絲嘴於將2種以上之熱塑性樹脂複合之狀態下以絲線之形式噴出。繼而,一面向所噴出之絲線吹送經控制為5℃~20℃之冷風而進行冷卻,一面藉由牽引裝置進行牽引。自牽引裝置伸出之絲線於搬送機上堆積並以織物之形式被搬送。亦可將搬送中之織物積層而製成多層積層之不織網。於多層積層之不織布之情形時,各層可由不同之纖維徑形成,亦可將異形截面纖維、捲縮纖維、中空纖維等特殊形態之纖維之不織布積層。 上述不織網之接合可使用:利用接著劑進行接合之方法,藉由低熔點纖維或複合纖維進行接合之方法,於織物形成中散佈熱熔黏合劑而進行熔融接合之方法,利用針刺、水流等將纖維交纏等方法,並無特別限定。就高速生產性之觀點而言,亦可藉由部分熱壓接進行接合。例如,可使織物通過可賦予針點狀、橢圓形狀、菱形狀、矩形狀等之接合點之經加熱之壓紋/平坦輥間而進行接合。就強度保持及柔軟性、以及不織布之體積之保持、使表面之凹凸結構不會於輥間潰縮之觀點而言,部分熱壓接中之熱壓接面積率較佳為5~40%,更佳為5~25%。 又,就容易維持不織布表面結構之特徵或不織布之厚度之觀點而言,尤其於將2種以上之熱塑性樹脂組合而成之複合長纖維之情形時,只要為加熱至纖維彼此之交點可熔融並進行接著之溫度以上之方法,則可無特別限定地使用,作為進行加熱之方法,可使用熱風循環型、熱風貫通型、紅外線加熱器型、向不織布之兩面噴附熱風之方法、導入至加熱氣體中之方法等各種加熱方法。就以纖維彼此之交點獲得更多之纖維接著點且不織布之斷裂強度變高之觀點而言,較佳為利用熱風之加熱,尤佳為熱風貫通型。 熱風貫通型之熱風溫度較佳為調整為適於所組合之熱塑性樹脂中熔點較低且有助於接合之熱塑性樹脂的溫度。例如,於2種以上之熱塑性樹脂之低熔點之樹脂為聚乙烯之情形時,較佳之熱風溫度為聚乙烯熔融並進行接著之120~155℃,較佳為135~155℃,更佳為140℃~150℃。若接著溫度高於120℃,則可於纖維彼此之交點表現出纖維彼此之接著,並表現出作為不織布之強度。又,若接著溫度為155℃以上,則纖維之熔解度變得非常高,質感變硬。 熱風之風速較佳為0.5~3.0 m/s,更佳為0.7~2.5 m/s,進而較佳為2.0 m/s以下。若風速較慢,則熱風無法貫通不織布之厚度方向,導致強度變低。又,若風速較快,則雖然熱風貫通,但纖維亦同時潰縮而成為體積較小之不織布。 只要不對不織布之表面結構造成不良影響,則亦可對上述利用熱風之加熱接合前之不織網實施熱接著。就生產性之觀點而言,熱接著較佳為通過金屬壓紋輥與金屬平坦輥之組合之一對輥。就不織網之形態保持或最終獲得之不織布之強度之觀點而言,壓紋面積率較佳為5~30%,更佳為5~20%,進而較佳為6~15%。又,壓紋之深度越深,則越可保持不織布之厚度,較佳為0.5~2.0 mm,進而較佳為0.7~1.5 mm。壓紋形狀並無特別限定,較佳為圓形狀、橢圓形狀、菱形狀、矩形狀。 不織布之纖維之平均纖維徑較佳為8.0 μm以上且38.0 μm以下,更佳為9.0 μm以上且33.5 μm以下,進而較佳為11.0 μm以上且26.5 μm以下。就紡絲穩定性之觀點而言,平均纖維徑較佳為8.0 μm以上,就用於衛生材料之不織布之質感之觀點而言,更佳為38.0 μm以下。 不織布之單位面積重量較佳為8 g/m2
以上且80 g/m2
以下,更佳為10 g/m2
以上且40 g/m2
以下,進而較佳為10 g/m2
以上且30 g/m2
以下。若單位面積重量為8 g/m2
以上,則作為用於衛生材料之不織布而滿足強度,若為80 g/m2
以下,則滿足用於衛生材料之不織布之質感,外觀上不會有厚重之印象。 不織布無荷重時之高度較佳為140 μm以上,更佳為140 μm以上且3000 μm以下,進而較佳為140 μm以上且2000 μm以下。就不織布之質感及透水性之回滲性能之觀點而言,無荷重時之高度較佳為140 μm以上,若超過3000 μm,則外觀上會有厚重之印象,並且具有剛性而不適於用作衛生材料。 不織布之由X射線CT所得之配向指標為0.43以下,較佳為0.425以下。若由X射線CT所得之配向指數為該範圍,則佔據不織布之厚度方向之纖維變多,即便於荷重下體積亦不潰縮,成為具有蓬鬆性之不織布,可獲得緩衝性優異及回滲指數較低之親水性蓬鬆不織布。下限越低越好,但配向指標較佳為0.30以上,更佳為0.33以上。 本實施形態之不織布之壓縮作功量WC較佳為0.20 gf・cm/cm2
以上且1.00 gf・cm/cm2
以下,更佳為0.20 gf・cm/cm2
以上且0.80 gf・cm・cm2
以下,保持該範圍之壓縮作功量WC之情況下,可獲得作為用於衛生材料之不織布之緩衝性及優異之回滲指數。 本實施形態之親水性蓬鬆不織布係含有或塗佈有透水劑。作為所使用之透水劑,考慮到對人體之安全性、步驟中之安全性等,可列舉:高級醇、高級脂肪酸、烷酚等加成有環氧乙烷之非離子系活性劑,烷基磷酸鹽、烷基硫酸鹽等陰離子系活性劑等單獨或由混合物等構成之界面活性劑。作為透水劑,例如亦可較佳地使用聚醚化合物、聚乙烯醚改性聚矽氧、聚醚改性聚矽氧、聚酯化合物、聚醯胺化合物、聚甘油化合物等。 作為含有或塗佈透水劑之方法,可採用向纖維中之混練或塗佈法(凹版塗佈機、接觸式塗佈機)、噴霧法等現有之方法,亦可視需要採用電暈放電處理、常壓電漿放電處理等前處理。作為塗佈後之乾燥方法,可採用利用對流傳熱、傳導傳熱、輻射傳熱等之已知之方法,可使用利用熱風或紅外線之乾燥、利用熱接觸之乾燥方法等。 透水劑之附著量係根據目標用途而不同,例如作為衛生材料用,通常相對於不織布而較佳為0.10 wt%以上且1.50 wt%以下之範圍,更佳為0.15 wt%以上且1.20 wt%以下。若未達0.10 wt%,則難以獲得令人滿意之透水性能,另一方面,若超過1.50 wt%,則容易於肌膚上產生斑疹或濕疹。 透水劑亦可利用水等溶劑進行稀釋而以水溶液之形式塗佈。又,為了不產生伴隨著設備之高速化的乾燥步驟中之乾燥不足等,透水劑水溶液之塗佈量以少為佳。對不織布之塗佈量(wt%)於上述任一塗佈方法中均較佳為1.0 wt%以上且65 wt%以下,更佳為3.0 wt%以上且60 wt%以下,進而較佳為5.0 wt%以上且50 wt%以下。若未達1.0 wt%,則無法獲得均勻之塗佈,另一方面,若超過65 wt%,則所需之乾燥能力變大,設備成本增大,而且可能產生乾燥不足。 例如,於利用凹版塗佈機進行之透水劑之塗佈中,凹版輥之圖樣可為格子型或稜錐型,較佳為透水劑不易殘留於凹版單元底部之斜線型。單元容積較佳為5 cm3
/m2
以上且40 cm3
/m2
以下,若未達5 cm3
/m2
,則塗佈量過少,因此難以進行均勻之塗佈,若超過40 cm3
/m2
,則塗佈量過多,因此產生因乾燥步驟中之乾燥不足或遷移所致的透水劑之附著不均等問題。 上述凹版單元之深度較佳為10 μm以上且80 μm以下,其間隔較佳為80目以上且250目以下之範圍內,較佳為以成為上述單元容積之方式進行設計。 就可應對設備之高速化,可效率良好地進行塗佈,即便為具有厚度之不織布亦可於厚度方向均勻地進行塗敷,又,即便透水劑及不織布之滲透性略差亦可均勻地進行塗敷,且因不存在使不織布通過一對輥間之步驟故而容易維持不織布之厚度的方面而言,較佳為利用噴霧法塗佈透水劑。作為噴霧法,可為通常公知之利用空氣壓縮之噴附法、或直接壓縮透水劑水溶液並進行噴霧之方法,就可均勻地塗佈於不織布之觀點而言,尤佳為轉子濕潤(rotor dampening)方式。藉由實施防止塗佈時之透水劑水溶液飛濺之策略,即便於設備高速運轉時亦可進行塗佈。所謂轉子濕潤方式,係向旋轉之轉子上供給透水劑水溶液,利用轉子旋轉之離心力噴霧透水劑水溶液的方法。於轉子濕潤方式中,能以僅於塗佈方向上僅於需塗佈之不織布側噴霧因轉子旋轉而飛出之透水劑水溶液之液體粒子之方式、且可於不織布之CD(Cross Direction,橫向)方向均勻地進行塗佈之方式限定開口部,藉由轉子轉速調整噴霧粒徑。 於上述轉子濕潤方式之情形時,例如選定轉子之直徑為40 mm以上且100 mm以下者,以透水劑水溶液可均勻地附著於需塗佈之不織布之CD方向之方式設定需塗佈之不織布面與轉子之中心之距離。較理想為以自鄰接轉子噴霧之塗佈分佈範圍之二分之一重疊之方式進行設定。又,轉子較理想為於CD方向上等間隔地配置於60 mm以上且220 mm以下之範圍內,且設為2段。 均勻塗佈之關鍵在於使噴霧粒子深入至需塗佈之不織布之內部,該噴霧粒徑較佳為0.010 mm以上且0.200 mm以下,進而較佳為0.030 mm以上且0.070 mm以下。為了形成最佳之噴霧粒徑,透水劑水溶液之表面張力變得重要,噴霧粒徑係藉由下式算出。 噴霧粒徑(μm)={100000×√(表面張力(N/m))}/(轉子直徑(mm)×轉子轉速(rpm)) 又,該等塗佈方法中之透水劑水溶液之溫度較佳為5℃以上且50℃以下,就溶液之均勻分散、穩定性之觀點而言,更佳為12℃以上且40℃以下。透水劑水溶液之黏度較佳為0.5 mPa・s以上且50 mPa・s以下,就容易更均勻地進行塗佈之觀點而言,更佳為0.8 mPa・s以上且20 mPa・s以下。若黏度超過50 mPa・s,則透水劑水溶液對不織布之滲透性較差,難以進行均勻之塗佈。 塗佈透水劑水溶液後之乾燥可使用通常之乾燥方式,並無特別限定,可採用利用對流傳熱、傳導傳熱、輻射傳熱等之已知之方法,可使用熱風循環型、熱風貫通型、紅外線加熱器型、向不織布之兩面噴附熱風之方法、導入至加熱氣體中之方法等各種乾燥方法。 如圖1所示,本實施形態之不織布之表面結構之特徵在於:於將該不織布表面上之測定基準長度設為100 μm時,由X方向Y方向界定之單位區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率於相當於該不織布表面積20 mm×20 mm之每40000區塊數中為50%以上。 不織布表面上之測定基準長度、及最大高度如下所述。使用數位顯微鏡KH-8700(Hirox製造)於不織布之MD(Machine Direction,縱向)方向20 mm、CD方向20 mm中在各方向上以20 μm間隔測定採取不織布表面之高度資訊。以每100 μm對在不織布之MD方向20 mm×CD方向20 mm中所獲得之高度資訊進行劃分,將此時所劃分之長度作為測定基準長度。又,將該單位區塊內之最大值與最小值之差作為不織布表面之最大高度。最大高度相對於不織布無荷重時之高度(厚度)之比率係由最大高度(μm)/無荷重時之高度(μm)×100而算出。 即,最大高度相對於不織布無荷重時之高度(厚度)之比率為30%以上之區塊之比率越高,則不織布表面之微細區塊內之凹凸差越變大。於本實施形態中,最大高度相對於不織布無荷重時之高度(厚度)之比率為30%以上之區塊相對於在該不織布之MD方向20 mm×CD方向20 mm中以測定基準長度100 μm進行劃分所得之每40000區塊為50%以上。藉由具有此種不織布表面之結構之特徵,例如不論對不織布賦予之透水劑如何,於尿液等液體附著於不織布表面時,其接觸角均變低,使液體自不織布表面迅速移動至不織布內部。就不織布之液體移動性之觀點而言,於本實施形態中,最大高度相對於不織布無荷重時之高度(厚度)為30%以上之區塊之比率為50%以上,較佳為52%以上,更佳為55%以上,進而較佳為60%以上。藉由該比率處於該範圍內,可表現出良好之透水性。該比率越高越好,但就肌膚觸感變差之方面而言,較佳為98%以下。 成為本實施形態之不織布之透水性之指標的透水45度傾斜流長值為25 mm以下,較佳為22 mm以下,進而較佳為20 mm以下,最佳為18 mm以下。若透水45度傾斜流長值超過25 mm,則例如於用於拋棄式尿布等之表面材料之情形時,表面之液體流動變多,容易引起漏尿。 成為本實施形態之不織布之透水性之指標的第4次耐久透水指數為85%以上。若第4次耐久透水指數之值未達85%,則例如於用於拋棄式尿布等之表面材料之情形時,對於複數次之排尿,表面材料無法透水而喪失作為表面材料之功能,容易引起漏尿。 又,成為本實施形態之不織布之透水性之指標的回滲指數較佳為0.8 g以下,更佳為0.5 g以下。若回滲指數之值超過0.8 g,則例如於用於拋棄式尿布之表面材料之情形時,於表面材料接觸肌膚時有非常潮濕之觸感,使用感變差。回滲指數越低越好,但0.01 g以下之值為測定下限,測定偏差較大。 [實施例] 以下,藉由實施例、比較例具體地說明本發明,但本發明並非僅限定於以下之實施例。再者,各特性之評價方法如下所述,將所獲得之物性示於以下之表1。以下,將不織布製造中之行進方向稱為MD方向,將與該方向為直角之方向且寬度方向稱為CD方向。 1.平均纖維徑(μm) 於不織布之CD方向進行5等分而選取1 cm見方之試片,利用KEYENCE公司製造之顯微鏡VHX-700F於各20點測定纖維之直徑,並算出其平均值。 2.不織布之單位面積重量(g/m2
) 依據JIS-L1906,以選取位置均等之方式於不織布之CD方向選取5片MD方向20 cm×CD方向5 cm之試片並測定質量,將其平均值換算成每單位面積之重量而求出單位面積重量(g/m2
)。 3.不織布無荷重時之高度(厚度)(μm) 任意選取10片MD方向4 mm×CD方向10 mm之試片,使用KEYENCE製造之SEM(Scanning Electron Microscope,掃描式電子顯微鏡)(VE-8800)拍攝不織布截面之照片。所獲得之圖像係使用同為KEYENCE製造之圖像分析軟體,對每1圖像於5點測定厚度方向之距離,將其平均值作為無荷重時之高度(厚度)(μm)。 4.不織布表面之最大高度(μm) 於任意方向以20 mm×20 mm之正方形之尺寸切割選取不織布。繼而,使用數位顯微鏡KH-8700(Hirox製造)之3D分佈功能,於該不織布之正方形之各邊方向20 mm中在各方向上以20 μm間隔測定選取不織布表面之高度資訊。以每100 μm對在不織布之正方形之各邊20 mm×20 mm中所獲得之高度資訊進行劃分,將此時劃分之長度作為測定基準長度。又,將該區塊內之最大值與最小值之差作為不織布表面之最大高度。將該測定順序模式性地示於圖1。 藉由最大高度(μm)/無荷重時之高度(厚度)(μm)×100算出不織布表面之最大高度相對於不織布無荷重時之高度(厚度)(μm)之比率。 進而,將最大高度相對於不織布無荷重時之高度(厚度)之比率為30%以上之區塊數除以該不織布之正方形之各邊方向20 mm×20 mm中以測定基準長度100 μm所劃分之40000區塊數而算出比率(%)。 5.配向指數(X射線CT) 任意地切割MD方向5 mm×CD方向5 mm之試片並以圖像分析時之視場約3 mm×3 mm進行測定。測定裝置係使用高解析3DX射線顯微鏡nano3DX(Rigaku股份有限公司製造),並藉由即便為輕元素亦獲得對比度之低能量高亮度X射線之CT測定進行測定。將詳細之條件示於以下。 X射線靶:Cu X射線管電壓:40 kV X射線管電流:30 mA 透鏡:1.08 μm/pix 組合:2 旋轉角度:180° 投影數:1000張 曝光時間:10秒/張 相機像素:3300×2500 再構成:Feldkamp法 對藉由CT測定所獲得之三維之層析圖進行圖像分析,求出正交之3軸(x、y、z)之配向性指標Ix、Iy、Iz。使欲重點評價之樣本之厚度方向與z方向一致。此處所謂配向性指標Ix、Iy、Iz,係於將自x、y、z各方向觀察到之纖維表面之面積之和(各方向上之纖維表面之延伸投影面積之和)分別設為Ax、Ay、Az時,以 Ix=Ax/(Ax+Ay+Az) Iy=Ay/(Ax+Ay+Az) Iz=Az/(Ax+Ay+Az) 定義。Ax、Ay、Az係由層析圖求出。於該指標中,在值較小之方向上進行配向。又,於各向同性結構中全部成為1/3。 6.壓縮作功量(WC) 於CD方向選取5點之5 cm見方之試片,並使用Kato Tech公司製造之壓縮試驗裝置(KES-G5)進行測定。將試片設置於金屬製試樣台上,於具有加壓面積2 cm2
之圓形平面之鋼板間進行壓縮。壓縮速度為0.067 mm/s,且壓縮最大荷重係設為3.4 kPa(35 gf/ cm2
)。恢復過程亦以同一速度進行測定,並算出壓縮作功量之平均值。 7.捲縮數(個/2.54 cm(吋)) 於不織布之CD方向進行5等分而選取5 cm見方之試片,藉由KEYENCE公司製造之顯微鏡VH-Z450於未對纖維施加荷重之狀態下選擇5根纖維並測定每1吋之長度之捲縮數,根據其平均值算出捲縮數(個/吋)。 8.透水45度傾斜流長值(mm) 於經傾斜為45度之板上重疊10張衛生紙(Itoman股份有限公司製造之HARD SINGLE 1R55m)作為吸收體,於其上方放置試驗布(20 cm見方),自布上方10 mm之高度滴加0.1 cc之生理鹽水。讀取生理鹽水自滴加位置至吸收結束所流落之距離。於試驗布內任意20點進行該測定,將其平均值作為透水45度傾斜流長值(mm)。 9.耐久透水指數(%) 重疊10張衛生紙(Itoman股份有限公司製造之HARD SINGLE 1R55m)作為吸收體,於其上方放置試驗布(20 cm×30 cm)。進而於其上方放置等間隔地於10處開設有直徑1.5 cm之孔之不鏽鋼製之板,自位於各孔之布上方10 mm之高度滴加生理鹽水0.3 cc,經過3分鐘後,再次同樣地滴加。第3次滴加後,對10秒以內吸收之孔之個數(A)進行計數。對相同試樣40處進行該試驗並將{((A)/(孔10處×試樣40處)×100)}作為第3次透水耐久指數(%)。又,繼續於第4次滴加後亦與第3次同樣地對10秒以內吸收之孔之數量(B)進行計數,將{((B)/( 孔10處×試樣40個處)×100)}作為第4次透水耐久指數(%)。 10.回滲指數(g) 為了作為吸收體而預先使吸收體之特性一定化,於3片特定濾紙(Ahlstrоm公司製造之GRADE:989)上放置試驗布。進而於其上方放置10 cm見方且中央開設有直徑25 mm之孔之板(約800 g),自中央孔之上部25 mm高度滴加生理鹽水(吸收體重量之3.5倍之液體量)並使其吸收。其次,去掉試驗布上方之板,輕輕放置3.5 kg之砝碼(10 cm見方)並耗時3分鐘使吸收體中液體之分佈一定化。繼而,暫時去掉3.5 kg之砝碼,迅速將2張預先經稱量之測定用濾紙(HOLLINGSWORTH&VOSE.CONPANY製造之ERTMWWS SHEETS,12.5 cm見方)放置於試驗布之上方,並再次輕輕放置3.6 kg之砝碼。2分鐘後稱量該測定濾紙之重量增加。將該增加量之值(g)作為回滲指數。 11.透水劑水溶液之塗佈量(wt%) 將根據透水賦予加工1小時之透水劑水溶液消耗量藉由下式算出之值作為透水劑水溶液之塗佈量(wt%)。 塗佈量(wt%)=透水劑水溶液消耗量(g)/{不織布單位面積重量(g/m2
)×寬度(m)×加工速度(m/min)×60(min)}×100 12.透水劑純附著量(wt%) 對以25℃×40%RH之溫度濕度進行24小時濕度控制之附著有透水劑之不織布試樣之重量(W1)、及使用甲醇自該不織布試樣進行索氏萃取所得之透水劑之重量(W2)進行測定,藉由下式求出透水劑純附著量C(wt%)。 C(wt%)=[W2/W1]×100 不織布試樣之取樣係於MD方向以30 cm間隔自5處、於CD方向在不織布之寬度內等間隔地自5處以切割寬度為5 cm~10 cm範圍且不織布試樣成為約2 g之長度進行切割,選取合計10片試驗布。進行上述測定並將該等之平均值作為透水劑純附著量(wt%)。 13.分散 以50 cm×50 cm選取不織布,藉由目測判定按不織布外觀之以下評價基準進行分級。分散評價之觀點係設定為條紋狀等斑紋是否不具規則性,或者單紗是否均勻地擴展(是否未成為塊狀)。等級越高,表示分散越良好。 5:非常良好 4:良好 3:通常(可作為製品而使用之水準) 2:較差 1:非常差 [實施例1] 將MFR為55 g/10 min(依據JIS-K7210,於溫度230℃、荷重2.16 kg下進行測定)之聚丙烯(PP)樹脂作為第1成分,將MI為26 g/10 min(依據JIS-K7210,於溫度190℃、荷重2.16 kg下進行測定)之高密度聚乙烯(HDPE)樹脂作為第2成分,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.4 g/min・hоle、第2成分之噴出量為0.4 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比成為1/1的纖維,使用利用空氣噴射之高速氣流牽引裝置以紡速3200 m/min朝向移動捕獲面擠出該長絲群,製備平均纖維徑17.9 μm之偏芯鞘芯型複合長纖維織物。 繼而,對於所獲得之織物,藉由熱風溫度142℃、熱風風速0.7 m/s之熱風將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數15個/吋之複合長纖維不織布。 繼而,將包含六甘油單硬脂酸酯、聚醚改性聚矽氧與聚氧伸烷基蓖麻油醚之混合物之透水劑之3 wt%水溶液調整為液溫20℃、液黏度3.2 mPa・s而作為用於所獲得之不織布之透水劑水溶液,以塗佈量成為10 wt%之方式,藉由轉子濕潤方式塗佈於上述不織布。所使用之轉子之直徑為80 mm,各轉子係於CD方向以115 mm間隔、以使轉子中心與所塗佈之不織布之距離成為180 mm之方式進行配置。又,調整轉子轉速,使所噴霧之透水劑水溶液之噴霧粒徑成為35 μm。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為85%,不織布之透水45度傾斜流長值為16 mm,第4次耐久透水指數為99%,回滲指數為0.12 g。將結果示於以下之表1。 [實施例2] 利用與實施例1同樣之方法,獲得平均纖維徑17.9 μm、單位面積重量10 g/m2
、捲縮數15個/吋之偏芯鞘芯型複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為87%,不織布之透水45度傾斜流長值為14 mm,第4次耐久透水指數為99%,回滲指數為0.50 g。將結果示於以下之表1。 [實施例3] 第1成分之噴出量為0.54 g/min・hоle,第2成分之噴出量為0.26 g/min・hоle且總噴出量為0.80 g/min・hоle,第1成分與第2成分之比係設為約2/1,除此以外,以與實施例1同樣之方法製備平均纖維徑為17.9 μm之偏芯鞘芯型複合長纖維織物。 對於所獲得之偏芯鞘芯型複合長纖維織物,藉由熱風溫度145℃、熱風風速1.0 m/s之熱風將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數10個/吋之複合長纖維不織布。 繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為74%,不織布之透水45度傾斜流長值為16 mm,第4次耐久透水指數為99%,回滲指數為0.12 g。將結果示於以下之表1。 [實施例4] 以與實施例3同樣之方法獲得平均纖維徑17.9 μm、單位面積重量18 g/m2
、捲縮數10個/吋之複合長纖維不織布。 將透水劑之1 wt%水溶液調整為液溫20℃、液體濃度2.3 mPa・s,以凹版塗敷方式使用斜線圖樣120目、單元容積22 cm3
/m2
之凹版輥,以塗佈量成為30 wt%之方式塗佈於所獲得之複合長纖維不織布,繼而,通過120℃之滾筒乾燥機進行乾燥並捲取。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為70%,不織布之透水45度傾斜流長值為17 mm,第4次耐久透水指數為97%,回滲指數為0.22 g。將結果示於以下之表1。 [實施例5] 將第1成分設為與實施例1同樣之聚丙烯樹脂,將第2成分設為MI為16.8 g/10 min(依據JIS‐K7210,於溫度190℃、荷重2.16 kg下進行測定)之直鏈狀低密度聚乙烯(LLDPE)樹脂,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.54 g/min・hоle、第2成分之噴出量為0.26 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比為約2/1的纖維,使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,製備平均纖維徑20.5 μm之偏芯鞘芯型長纖維織物。 對於所獲得之偏芯鞘芯型長纖維織物,藉由熱風溫度150℃、熱風風速0.3 m/s之熱風將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數40個/吋之複合長纖維不織布。 繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為92%,不織布之透水45度傾斜流長值為15 mm,第4次耐久透水指數為99%,回滲指數為0.35 g。將結果示於以下之表1。 [實施例6] 利用與實施例5同樣之方法獲得平均纖維徑20.5 μm、單位面積重量18 g/m2
、捲縮數40個/吋之偏芯鞘芯型複合長纖維不織布。繼而,將除了使透水劑水溶液之濃度為5 wt%以外與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為92%,不織布之透水45度傾斜流長值為13 mm,第4次耐久透水指數為99%,回滲指數為0.47 g。將結果示於以下之表1。 [實施例7] 利用與實施例1同樣之方法製備平均纖維徑17.9 μm之偏芯鞘芯型複合長纖維織物。 繼而,使所獲得之偏芯鞘芯型複合長纖維不織網通過100℃之平坦輥與壓紋輥(圖案規格:直徑1.00 mm之圓形、錯位排列、橫向間距4.4 mm、縱向間距4.4 mm、壓接面積率7.9%)之間而將纖維彼此暫時接著,繼而,藉由熱風溫度142℃、熱風風速0.7 m/s之熱風將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數17個/吋之複合長纖維不織布。 繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為72%,不織布之透水45度傾斜流長值為18 mm,第4次耐久透水指數為95%,回滲指數為0.18 g。將結果示於以下之表1。 [實施例8] 以與實施例7同樣之方法獲得平均纖維徑17.9 μm、單位面積重量8 g/m2
、捲縮數17個/吋之偏芯鞘芯型複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為74%,不織布之透水45度傾斜流長值為16 mm,第4次耐久透水指數為97%,回滲指數為0.42 g。將結果示於以下之表1。 [實施例9] 使用與實施例1同樣之成分,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.40 g/min・hоle、第2成分之噴出量為0.40 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比成為1/1的纖維。使用利用空氣噴射之高速氣流牽引裝置以紡速3200 m/min朝向移動捕獲面擠出該長絲群,製備平均纖維徑17.9 μm之並列型複合長纖維織物。 繼而,對於所獲得之並列型複合長纖維織物,與實施例7同樣地使纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數23個/吋之複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布之無荷重狀態之高度(厚度)為30%以上的區塊之比率為76%,不織布之透水45度傾斜流長值為15 mm,第4次耐久透水指數為99%,回滲指數為0.15 g。將結果示於以下之表1。 [實施例10] 將第1成分設為溶液黏度0.75 ηsp/c之聚對苯二甲酸乙二酯(PET),將第2成分設為與實施例1同樣之高密度聚乙烯(HDPE),藉由紡黏法於紡絲溫度295℃下擠出第1成分之噴出量為0.54 g/min・hоle、第2成分之噴出量為0.26 g/min・hоle且總噴出量為0.80 g/min・hоle、第1成分與第2成分之比為約2/1的纖維,使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,製備平均纖維徑18.7 μm之偏芯鞘芯型複合長纖維織物。 對於所獲得之偏芯鞘芯型複合長纖維織物,與實施例1同樣地將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數20個/吋之複合長纖維不織布。 繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為87%,不織布之透水45度傾斜流長值為15 mm,第4次耐久透水指數為99%,回滲指數為0.15 g。將結果示於以下之表1。 [實施例11] 使用與實施例1同樣之成分,第1成分之噴出量為0.24 g/min・hоle,第2成分之噴出量為0.56 g/min・hоle且總噴出量為0.8 g/min・hоle,第1成分與第2成分之比係設為3/7,除此以外,以與實施例1同樣之方法製備平均纖維徑17.9 μm之偏芯鞘芯型複合長纖維織物。 對於所獲得之偏芯鞘芯型複合長纖維織物,與實施例1同樣地將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數17個/吋之複合長纖維不織布。繼而,將與實施例4同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布之無荷重狀態之高度(厚度)為30%以上的區塊之比率為70%,不織布之透水45度傾斜流長值為18 mm,第4次耐久透水指數為95%,回滲指數為0.18 g。將結果示於以下之表1。 [實施例12] 使用與實施例1同樣之成分,第1成分之噴出量為0.16 g/min・hоle,第2成分之噴出量為0.64 g/min・hоle且總噴出量為0.8 g/min・hоle,第1成分與第2成分之比係設為1:4,除此以外,以與實施例1同樣之方法製備平均纖維徑18.7 μm之偏芯鞘芯型複合長纖維織物。 對於所獲得之偏芯鞘芯型複合長纖維織物,與實施例1同樣地將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數5個/吋之複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布之無荷重狀態之高度(厚度)為30%以上的區塊之比率為52%,不織布之透水45度傾斜流長值為22 mm,第4次耐久透水指數為85%,回滲指數為0.45 g。將結果示於以下之表1。 [實施例13] 使用與實施例1同樣之成分,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.40 g/min・hоle、第2成分之噴出量為0.40 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比為1:1的纖維。所擠出之長絲係利用移動捕獲面之抽吸力於牽引區域內經延伸之後,通過擴散器而堆積於移動捕獲面,製備平均纖維徑20.5 μm之並列型複合長纖維織物。 繼而,對於所獲得之並列型複合長纖維織物,與實施例1同樣地使纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數25個/吋之複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布之無荷重狀態之高度(厚度)為30%以上的區塊之比率為90%,不織布之透水45度傾斜流長值為14 mm,第4次耐久透水指數為99%,回滲指數為0.17 g。將結果示於以下之表1。 [實施例14] 以與實施例13同樣之方法獲得平均纖維徑20.5 μm、單位面積重量30 g/m2
、捲縮數25個/吋之偏芯鞘芯型複合長纖維不織布。繼而,將與實施例1同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為89%,不織布之透水45度傾斜流長值為14 mm,第4次耐久透水指數為99%,回滲指數為0.12 g。將結果示於以下之表1。 [實施例15] 使用配置有八字形異形噴嘴之紡絲頭以紡絲溫度240℃、噴出量為0.80 g/min・hоle擠出MFR為38 g/10 min之聚丙烯(PP),並使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,獲得平均纖維徑18.7 μm之長纖維織物。 繼而,使所獲得之長纖維織物通過經設定為溫度135℃、壓力60 kg/cm之平坦輥與壓紋輥(圖案規格:直徑0.425 mm之圓形、錯位排列、橫向間距2.1 mm、縱向間距1.1 mm、壓接面積率6.3%)之間而將纖維彼此部分地接著,獲得單位面積重量25 g/m2
、捲縮數28個/吋之長纖維不織布。 繼而,將與實施例4同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為55%,不織布之透水45度傾斜流長值為23 mm,第4次耐久透水指數為89%,回滲指數為0.12 g。將結果示於以下之表1。 [表1]
藉由紡黏法於紡絲溫度220℃下以單一成分擠出MFR為55 g/10 min(依據JIS-K7210,於溫度230℃、荷重2.16 kg下進行測定)之聚丙烯(PP)樹脂,使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,製備平均纖維徑17.9 μm之長纖維織物。 繼而,使所獲得之織物通過141℃之平坦輥與壓紋輥(圖案規格:直徑0.425 mm之圓形、錯位排列、橫向間距2.1 mm、縱向間距1.1 mm、壓接面積率6.3%)之間而將纖維彼此接著,獲得單位面積重量18 g/m2
之纖維未捲縮之長纖維不織布。 繼而,將與實施例4同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為40%,不織布之透水45度傾斜流長值為28 mm,第4次耐久透水指數為74%,回滲指數為0.56 g。將結果示於以下之表2。 [比較例2] 使比較例1中獲得之長纖維不織布通過1邊0.9 mm、線寬0.1 mm之連續蜂巢形狀圖樣(龜殼凹圖樣)(按壓面積率:12.5%,圖樣間距:縱向2.8 mm、橫向3.2 mm、深度0.7 mm)之壓紋輥(80℃)與表面硬度60度(JIS-A硬度)之橡膠輥之間,以2 kg/cm2
之壓力按壓圖樣。獲得龜殼周邊經按壓而具有高密度區域且中央凸起之柔軟之長纖維不織布。 繼而,將與實施例4同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為42%,不織布之透水45度傾斜流長值為27 mm,第4次耐久透水指數為80%,回滲指數為0.68 g。將結果示於以下之表2。 [比較例3] 使用與實施例1同樣之成分,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.72 g/min・hоle、第2成分之噴出量為0.08 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比為9/1的纖維,使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,製備平均纖維徑16.7 μm之偏芯鞘芯型複合長纖維織物。 繼而,對於所獲得之偏芯鞘芯型複合長纖維織物,藉由熱風溫度142℃、熱風風速0.7 m/s之熱風將纖維彼此接著,獲得單位面積重量18 g/m2
、捲縮數0個/吋之複合長纖維不織布。 繼而,將與實施例4同樣之透水劑水溶液以同樣之塗敷條件塗佈於所獲得之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為48%,不織布之透水45度傾斜流長值為28 mm,第4次耐久透水指數為64%,回滲指數為0.52 g。將結果示於以下之表2。 [比較例4] 使用與實施例1同樣之成分,藉由紡黏法於紡絲溫度220℃下擠出第1成分之噴出量為0.54 g/min・hоle、第2成分之噴出量為0.26 g/min・hоle且總噴出量為0.8 g/min・hоle、第1成分與第2成分之比為2/1的纖維,使用利用空氣噴射之高速氣流牽引裝置朝向移動捕獲面擠出該長絲群,製備平均纖維徑16.7 μm之鞘芯型複合長纖維織物。 繼而,關於所獲得之織物,以與比較例3同樣之方法及條件將纖維彼此接著之後,塗佈透水劑水溶液,獲得單位面積重量18 g/m2
、捲縮數0個/吋之複合長纖維不織布。 將所獲得之不織布之表面之測定基準長度設為100 μm時之區塊內之最大高度相對於不織布無荷重時之高度(厚度)為30%以上的區塊之比率為46%,不織布之透水45度傾斜流長值為26 mm,第4次耐久透水指數為73%,回滲指數為0.60 g。將結果示於以下之表2。 [表2]
[產業上之可利用性] 本發明之親水性蓬鬆不織布具有優異之透水性,因此可較佳用於衛生材料之製造。關於衛生材料,可較佳地用於拋棄式尿布、經期衛生棉或失禁墊之表面之頂部片材。又,本發明之親水性蓬鬆不織布並不限於上述用途,亦可用於例如口罩、懷爐、膠帶底布、貼布藥底布、創口貼底布、包裝材料、擦拭製品、醫用長袍、繃帶、衣物、護膚用片材等。Hereinafter, embodiments of the present invention will be described in detail. The nonwoven fabric of the present embodiment contains thermoplastic fibers, and can be a long-fiber nonwoven fabric produced by a spunbonding method or a short-fiber nonwoven fabric produced by a carding method or the like. However, in the case of a short fiber non-woven fabric, the fiber is pulled in the X direction or the Y direction during the carding, and the surface is easily smoothed, and the viewpoint of the situation, the strength, the productivity, and the stimulation of the skin are reduced. In other words, as the fibers constituting the woven fabric, long fibers produced by a spunbonding method are preferred. In the present specification, the term "long fiber" means a fiber having a fiber length of 55 mm or more. The shorter the fiber length, the greater the probability that the end portion of the fiber will contact the skin, so that the tactile sensation is given, so the fiber length is preferably 55 mm or more. Examples of the thermoplastic resin constituting the thermoplastic fiber include polyolefin resins such as polyethylene, polypropylene, and copolymerized polypropylene, and polyethylene terephthalate, polybutylene terephthalate, and polynaphthalene dicarboxylic acid. Polyester resin such as ethylene glycol or copolymerized polyester, polyamine resin such as nylon-6, nylon-66, copolymerized nylon, and polylactic acid, polybutylene succinate, and polybutyl succinate The biodegradable resin such as an ester is not particularly limited. The viewpoint of the texture of the non-woven fabric and the use of the fabric are mostly disposable materials. From the viewpoint of versatility and convenience of recycling, a polyolefin resin is preferred. As a form of the thermoplastic fiber, it is preferable that the fiber is crimped from the viewpoint of imparting characteristics to the surface structure of the nonwoven fabric. The number of crimps is preferably 5 pieces/2.54 cm (吋) or more, more preferably 5 pieces/吋 or more and 45 pieces/吋 or less, further preferably 10 pieces/吋 or more and 40 pieces/吋 or less, and particularly preferably 10 / 吋 or more and 25 / 吋 or less. In the case of a non-woven fabric composed of fibers having a crimping number of more than 45/inch, the shortening or unevenness of the crimping of the fibers is conspicuous, resulting in deterioration of the appearance of the nonwoven fabric, and deterioration of the bleed index due to unevenness. . Further, in the case of a non-woven fabric composed of fibers having a crimping number of less than 5 Å, the desired surface roughness cannot be obtained, the thickness is reduced, the texture is impaired, or the desired water permeability is difficult to obtain. As a method of crimping the above-mentioned fibers, the fiber cross-section can be crimped by setting the cross section of the fiber into a cross-sectional shape and cooling it while the spinning is cooled. Further, the composite fiber containing two or more kinds of thermoplastic resins may exhibit curling, and the composition thereof may be made into a side-by-side type (S/S) or a eccentric sheath type (partial S/C). The ground shows a curl. In the case of the eccentric sheath type (S/C), the core may also be exposed on the surface of the fiber, and the ratio of the core to the surface of the fiber is preferably 0 to 50%, more preferably 0. ~30%. If the ratio of the core portion to the surface of the fiber is as high as more than 50%, the adhesion of the nonwoven fabric is affected, and the strength of the cloth is liable to be lowered, and fluffing is likely to occur. In the case of the eccentric sheath core type (S/C), in order to obtain the desired number of crimps, the center of gravity of the cross-sectional area of the core is preferably shifted by 5 to 40 with respect to the center of gravity of the cross-sectional area of the composite fiber. %. The offset of the core is calculated by the following formula. Offset (%) of the core = (the shortest distance between the center of gravity of the cross-sectional area of the composite fiber and the center of gravity of the cross-section of the core) / (diameter of the wire) × 100 The fiber system is composed of two or more thermoplastic resins. In the case of the above, as long as the desired effect can be exerted, it is preferred that any combination of the above thermoplastic resins is a combination of thermoplastic resins having a difference in melting point from the viewpoint of bonding the fibers to each other. The weight ratio of the resin having a higher difference in melting point to the fiber is preferably 20% by weight or more and 80% by weight or less, more preferably 30% by weight or more and 80% by weight or less, further preferably 50% by weight or more and 70% or more Below wt%. Moreover, from the viewpoint of the texture of the nonwoven fabric to be obtained, it is preferred to use a combination of a polyolefin resin and a polyolefin resin in combination with a polyester resin. When a polyolefin resin is used in combination, a composite fiber obtained by combining a resin such as polyethylene, polypropylene, or a copolymer of these monomers with other α-olefins may be mentioned. The other α-olefin is a carbon number of 3 to 10, and specific examples thereof include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, and 1-octene. When a polyolefin resin and a polyester resin are combined, it is preferable to use a polyethylene terephthalate single component or a copolymer containing isophthalic acid or the like. Further, polyethylene terephthalate may be modified by a blend or the like, or an additive or the like may be added. Among them, the combination of the thermoplastic resin is preferably strong in strength and is not easily broken at the time of use, and is excellent in processability in producing a sanitary material, and in addition, the first component is preferably polypropylene. When the second component is made of polyethylene and the composite fiber is a eccentric sheath type, it is preferable to use the core as the first component and the sheath as the second component. In the case where fibers are formed from the above two thermoplastic resins, the polypropylene of the first component may be a polymer synthesized by a usual Ziegler-Natta catalyst, or may be a single represented by a metallocene. The polymer synthesized by the active catalyst. Further, it may be ethylene random copolymerized polypropylene. These may be used alone or in combination of two or more. In particular, in terms of texture, strength, and dimensional stability, it is preferred to use homopolypropylene as a main component. Further, in terms of the spinnability at the time of fiber production and the strength of the fiber obtained, the lower limit of MFR (melt mass flow rate) of polypropylene is preferably 20 g/10 min or more. More preferably, it is more than 30 g/10 min, further preferably more than 40 g/10 min, and most preferably more than 53 g/10 min. The upper limit of the MFR is preferably 85 g/10 min or less, more preferably 70 g/10 min or less, and further preferably 60 g/10 min or less. MFR is based on JIS-K7210 "Test Method for Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate of Plastic-Thermoplastic Plastics". Test Temperature 230 ° C, Test Load 2.16 The measurement was carried out in kg. In the case where the fibers are formed of the above two thermoplastic resins, the polyethylene of the second component may be a polymer synthesized by a usual Ziegler-Natta catalyst, or may be a single represented by a metallocene. The polymer synthesized by the active catalyst. The polyethylene is preferably a high density polyethylene, a linear low density polyethylene, and has a density of preferably 0.92 to 0.97 g/cm. 3 More preferably 0.925 to 0.96 g/cm 3 . Further, from the viewpoint of spinnability in the production of fibers, the lower limit of MI (Melt Index) of polyethylene is preferably 10 g/10 min or more, more preferably more than 15 g/10 min. The upper limit of MI is preferably 100 g/10 min or less, more preferably 60 g/10 min or less, and further preferably 40 g/10 min or less. The MI system was measured in accordance with JIS-K7210 "Test method for melt-mass flow rate (MFR) and melt capacity flow rate (MVR) of plastic-thermoplastic plastics", test temperature: 190 ° C, and test load: 2.16 kg. Further, in the case of using a polyester resin, the lower limit of the solution viscosity ηsp/c is preferably 0.2 or more, more preferably 0.6 or more. The upper limit of the solution viscosity ηsp/c is preferably 0.9 or less, more preferably 0.8 or less. From the viewpoint of strength and productivity, the fibers constituting the nonwoven fabric of the present embodiment are preferably in the form of a long fiber obtained by a spunbonding method. In the case of forming a composite long fiber which is a combination of two or more kinds of thermoplastic resins, for example, two or more different extruders respectively melt and extrude different thermoplastic resins from a plurality of spinning holes. The wire nozzle is ejected as a thread in a state in which two or more kinds of thermoplastic resins are compounded. Then, the blown wire is cooled by the cold air controlled to 5 ° C to 20 ° C, and pulled by the pulling device. The wire extending from the traction device is stacked on the conveyor and conveyed in the form of a fabric. It is also possible to laminate the fabrics in the conveyance to form a multi-layered non-woven fabric. In the case of a multi-layered non-woven fabric, the layers may be formed by different fiber diameters, and non-woven fabrics of special-shaped fibers such as irregular-shaped cross-section fibers, crimped fibers, and hollow fibers may be laminated. The joining of the non-woven nets may be carried out by a method of joining by a binder, a method of joining by a low-melting-point fiber or a composite fiber, a method of dispersing a hot-melt adhesive in the formation of a fabric, and performing fusion bonding, using acupuncture, The method of entanglement of a fiber, such as a water flow, is not specifically limited. From the viewpoint of high productivity, bonding can also be performed by partial thermocompression bonding. For example, the woven fabric can be joined by passing between heated embossing/flat rolls which can impart a joint of a needle dot shape, an elliptical shape, a rhombic shape, a rectangular shape and the like. The thermocompression bonding area ratio in the partial thermocompression bonding is preferably 5 to 40% from the viewpoint of maintaining strength and flexibility, and maintaining the volume of the non-woven fabric so that the uneven structure of the surface does not collapse between the rolls. More preferably 5 to 25%. Moreover, in view of the fact that it is easy to maintain the characteristics of the surface structure of the non-woven fabric or the thickness of the non-woven fabric, in particular, in the case of a composite long fiber in which two or more thermoplastic resins are combined, it is possible to melt as long as it is heated to the intersection of the fibers. The method of performing the temperature higher than the temperature is not particularly limited, and as a method of heating, a hot air circulation type, a hot air penetration type, an infrared heater type, a method of spraying hot air onto both sides of the nonwoven fabric, and introduction to heating can be used. Various heating methods such as methods in gas. From the viewpoint of obtaining more fibers at the intersections of the fibers and the point at which the breaking strength of the non-woven fabric becomes high, it is preferred to use hot air heating, and more preferably a hot air through type. The hot air temperature of the hot air through type is preferably adjusted to a temperature suitable for the thermoplastic resin having a lower melting point and contributing to bonding in the combined thermoplastic resin. For example, in the case where the resin having a low melting point of two or more kinds of thermoplastic resins is polyethylene, it is preferred that the hot air temperature is that the polyethylene is melted and then carried out at 120 to 155 ° C, preferably 135 to 155 ° C, more preferably 140. °C ~ 150 °C. If the temperature is higher than 120 ° C, the fibers can be followed by the intersection of the fibers, and the strength as a non-woven fabric can be exhibited. Further, when the temperature is 155 ° C or higher, the degree of melting of the fiber becomes extremely high, and the texture becomes hard. The wind speed of the hot air is preferably from 0.5 to 3.0 m/s, more preferably from 0.7 to 2.5 m/s, still more preferably less than 2.0 m/s. If the wind speed is slow, the hot air cannot penetrate the thickness direction of the non-woven fabric, resulting in a lower strength. Moreover, when the wind speed is high, the hot air penetrates, but the fibers are simultaneously collapsed to become a non-woven fabric having a small volume. As long as the surface structure of the nonwoven fabric is not adversely affected, the nonwoven web before the heat bonding by the hot air may be subjected to heat treatment. From the standpoint of productivity, the heat is then preferably a pair of rolls by a combination of a metal embossing roll and a metal flat roll. The embossed area ratio is preferably from 5 to 30%, more preferably from 5 to 20%, still more preferably from 6 to 15%, from the viewpoint of the strength of the nonwoven fabric which is maintained or finally obtained in the form of the nonwoven web. Further, the deeper the embossing depth, the more the thickness of the nonwoven fabric can be maintained, preferably 0.5 to 2.0 mm, and more preferably 0.7 to 1.5 mm. The embossed shape is not particularly limited, but is preferably a circular shape, an elliptical shape, a rhombic shape, or a rectangular shape. The average fiber diameter of the non-woven fabric fiber is preferably 8.0 μm or more and 38.0 μm or less, more preferably 9.0 μm or more and 33.5 μm or less, and still more preferably 11.0 μm or more and 26.5 μm or less. From the viewpoint of the spinning stability, the average fiber diameter is preferably 8.0 μm or more, and more preferably 38.0 μm or less from the viewpoint of the texture of the non-woven fabric of the sanitary material. The basis weight of the non-woven fabric is preferably 8 g/m 2 Above and 80 g/m 2 Below, more preferably 10 g/m 2 Above and 40 g/m 2 Hereinafter, it is further preferably 10 g/m 2 Above and 30 g/m 2 the following. If the weight per unit area is 8 g/m 2 Above, the strength is satisfied as a non-woven fabric for sanitary materials, if it is 80 g/m 2 In the following, the texture of the non-woven fabric for sanitary materials is satisfied, and the appearance is not heavy. The height of the non-woven fabric without load is preferably 140 μm or more, more preferably 140 μm or more and 3000 μm or less, and further preferably 140 μm or more and 2000 μm or less. From the viewpoint of the texture of the non-woven fabric and the rewet performance of the water permeable property, the height at the time of no load is preferably 140 μm or more, and if it exceeds 3000 μm, the appearance is thick and the rigidity is not suitable for use. Sanitary materials. The alignment index obtained by X-ray CT of the nonwoven fabric is 0.43 or less, preferably 0.425 or less. When the alignment index obtained by X-ray CT is within this range, the number of fibers occupying the thickness direction of the nonwoven fabric is increased, and the volume is not collapsed even under load, and the nonwoven fabric having bulkiness is obtained, and the cushioning property is excellent and the bleed index is obtained. Lower hydrophilic fluffy non-woven fabric. The lower the lower limit, the better, but the alignment index is preferably 0.30 or more, more preferably 0.33 or more. The compression work amount WC of the nonwoven fabric of the present embodiment is preferably 0.20 gf·cm/cm. 2 Above and 1.00 gf・cm/cm 2 Hereinafter, it is more preferably 0.20 gf·cm/cm 2 Above and 0.80 gf・cm·cm 2 Hereinafter, in the case where the compression work amount WC in this range is maintained, the cushioning property as a non-woven fabric for sanitary materials and the excellent back-infiltration index can be obtained. The hydrophilic fluffy nonwoven fabric of the present embodiment contains or is coated with a water permeable agent. As the water-permeable agent to be used, in view of safety to the human body, safety in the step, and the like, a nonionic active agent to which an ethylene oxide is added, such as a higher alcohol, a higher fatty acid or an alkylphenol, or an alkyl group, may be mentioned. An anionic active agent such as a phosphate or an alkyl sulfate, or a surfactant composed of a mixture or the like alone or in combination. As the water permeable agent, for example, a polyether compound, a polyvinyl ether-modified polyfluorene oxide, a polyether modified polysiloxane, a polyester compound, a polyamine compound, a polyglycerin compound, or the like can be preferably used. As a method of containing or coating the water permeable agent, a conventional method such as kneading or coating into a fiber (gravure coater, contact coater), a spray method, or the like may be employed, and corona discharge treatment may be used as needed. Pre-treatment such as normal piezoelectric discharge treatment. As a drying method after coating, a known method using convection heat transfer, conduction heat transfer, radiation heat transfer or the like can be employed, and drying by hot air or infrared rays, drying by thermal contact, or the like can be used. The amount of the water-permeable agent to be applied varies depending on the intended use. For example, it is preferably used as a sanitary material, and is usually 0.10 wt% or more and 1.50 wt% or less, more preferably 0.15 wt% or more and 1.20 wt% or less with respect to the nonwoven fabric. . If it is less than 0.10 wt%, it is difficult to obtain satisfactory water permeability. On the other hand, if it exceeds 1.50 wt%, it is likely to cause rash or eczema on the skin. The water permeable agent may also be diluted with a solvent such as water to be applied as an aqueous solution. Further, in order not to cause insufficient drying or the like in the drying step accompanying the increase in speed of the apparatus, the amount of the aqueous solution of the water-permeable agent is preferably small. The coating amount (wt%) of the nonwoven fabric is preferably 1.0 wt% or more and 65 wt% or less, more preferably 3.0 wt% or more and 60 wt% or less, further preferably 5.0, in any of the above coating methods. More than wt% and less than 50 wt%. If it is less than 1.0 wt%, uniform coating cannot be obtained. On the other hand, if it exceeds 65 wt%, the required drying ability becomes large, the equipment cost increases, and insufficient drying may occur. For example, in the application of the water permeable agent by the gravure coater, the pattern of the gravure roll may be a lattice type or a pyramid type, and it is preferable that the water permeable agent does not easily remain in the oblique shape of the bottom of the intaglio unit. The unit volume is preferably 5 cm 3 /m 2 Above and 40 cm 3 /m 2 Below, if less than 5 cm 3 /m 2 , the coating amount is too small, so it is difficult to apply uniform coating if it exceeds 40 cm 3 /m 2 However, since the coating amount is too large, there arises a problem that uneven adhesion of the water permeable agent due to insufficient drying or migration in the drying step. The depth of the intaglio unit is preferably 10 μm or more and 80 μm or less, and the interval is preferably in the range of 80 mesh or more and 250 mesh or less, and is preferably designed to be the cell volume. It is possible to cope with the increase in speed of the equipment, and it can be applied efficiently, even if it is a non-woven fabric having a thickness, it can be uniformly applied in the thickness direction, and even if the permeability of the water-permeable agent and the non-woven fabric is slightly poor, the coating can be performed uniformly. It is preferable to apply the water permeable agent by a spray method because it is applied and the thickness of the nonwoven fabric is easily maintained by the step of passing the nonwoven fabric between the pair of rolls. The spray method may be a commonly known method of spraying by air compression or directly compressing an aqueous solution of a water-permeable agent and spraying it, so that it can be uniformly applied to a non-woven fabric, and it is particularly preferable to rotate the rotor (rotor dampening). )the way. By implementing a strategy for preventing splashing of the aqueous solution of the water-permeable agent during coating, the coating can be performed even when the apparatus is operated at a high speed. The rotor wetting method is a method in which an aqueous solution of a water-permeable agent is supplied to a rotating rotor, and a water-permeable agent aqueous solution is sprayed by centrifugal force of rotation of the rotor. In the rotor wetting mode, it is possible to spray the liquid particles of the aqueous solution of the water-permeable agent which is flying out of the rotor only in the coating direction only on the non-woven side to be coated, and can be used for the CD of the nonwoven fabric (Cross Direction, horizontal direction). The direction is uniformly applied to define the opening portion, and the spray particle diameter is adjusted by the rotation speed of the rotor. In the case of the rotor wetting method described above, for example, if the diameter of the selected rotor is 40 mm or more and 100 mm or less, the non-woven fabric surface to be coated is set such that the aqueous solution of the water permeable agent can be uniformly attached to the CD direction of the non-woven fabric to be coated. The distance from the center of the rotor. It is preferred to set the overlap of one-half of the coating distribution range of the adjacent rotor spray. Further, it is preferable that the rotors are disposed at equal intervals in the CD direction in a range of 60 mm or more and 220 mm or less, and are set to two stages. The key to uniform coating is to penetrate the spray particles into the interior of the non-woven fabric to be coated, and the spray particle diameter is preferably 0.010 mm or more and 0.200 mm or less, and further preferably 0.030 mm or more and 0.070 mm or less. In order to form an optimum spray particle size, the surface tension of the aqueous solution of the water-permeable agent becomes important, and the spray particle size is calculated by the following formula. Spray particle size (μm) = {100000 × √ (surface tension (N / m))} / (rotor diameter (mm) × rotor speed (rpm)) Further, the temperature of the aqueous solution of the water permeable agent in the coating method is higher The temperature is preferably 5 ° C or more and 50 ° C or less, and more preferably 12 ° C or more and 40 ° C or less from the viewpoint of uniform dispersion and stability of the solution. The viscosity of the aqueous solution of the water-permeable agent is preferably 0.5 mPa·s or more and 50 mPa·s or less, and more preferably 0.8 mPa·s or more and 20 mPa·s or less from the viewpoint of being more uniformly applied. When the viscosity exceeds 50 mPa·s, the permeability of the water-permeable agent aqueous solution to the nonwoven fabric is poor, and it is difficult to apply uniform coating. The drying method after applying the aqueous solution of the water-permeable agent can be carried out by a usual drying method, and is not particularly limited, and a known method using convection heat transfer, conduction heat transfer, radiation heat transfer, or the like can be used, and a hot air circulation type or a hot air flow type can be used. Various drying methods such as an infrared heater type, a method of spraying hot air onto both sides of a non-woven fabric, and a method of introducing into a heated gas. As shown in Fig. 1, the surface structure of the nonwoven fabric of the present embodiment is characterized in that the maximum height in the unit block defined by the X direction Y direction is set when the measurement reference length on the surface of the nonwoven fabric is 100 μm. The ratio of the block having a height (thickness) of 30% or more in the non-woven fabric without load is 50% or more per 40,000 blocks corresponding to the surface area of the non-woven fabric of 20 mm × 20 mm. The measurement reference length and the maximum height on the surface of the nonwoven fabric are as follows. Using a digital microscope KH-8700 (manufactured by Hirox), the height information of the non-woven surface was measured at intervals of 20 μm in all directions in the MD (Machine Direction) direction of 20 mm in the non-woven fabric and 20 mm in the CD direction. The height information obtained in the MD direction of 20 mm × CD direction 20 mm of the non-woven fabric is divided every 100 μm, and the length divided at this time is used as the measurement reference length. Further, the difference between the maximum value and the minimum value in the unit block is taken as the maximum height of the surface of the nonwoven fabric. The ratio of the maximum height to the height (thickness) when the non-woven fabric has no load is calculated from the maximum height (μm) / height without load (μm) × 100. That is, the higher the ratio of the maximum height to the block in which the ratio of the height (thickness) of the non-woven fabric without load is 30% or more, the larger the unevenness of the unevenness in the fine block on the non-woven surface. In the present embodiment, the block having a ratio of the maximum height to the height (thickness) when the non-woven fabric has no load is 30% or more with respect to the 20 mm in the MD direction of the non-woven fabric × 20 mm in the CD direction to measure the reference length of 100 μm. The division of each of the 40,000 blocks is 50% or more. By the feature of the structure having such a non-woven surface, for example, regardless of the water-permeable agent imparted to the non-woven fabric, when a liquid such as urine adheres to the surface of the non-woven fabric, the contact angle thereof becomes low, and the liquid is quickly moved from the non-woven surface to the inside of the non-woven fabric. . In the present embodiment, the ratio of the maximum height to the block having a height (thickness) of 30% or more with respect to the non-woven fabric without load is 50% or more, preferably 52% or more. More preferably, it is 55% or more, and further preferably 60% or more. By the ratio being within this range, good water permeability can be exhibited. The higher the ratio, the better, but it is preferably 98% or less in terms of deterioration of the touch of the skin. The water-permeable 45-degree inclined flow length which is an index of the water permeability of the non-woven fabric of the present embodiment is 25 mm or less, preferably 22 mm or less, more preferably 20 mm or less, and most preferably 18 mm or less. If the turbulent flow length of 45 degrees is more than 25 mm, for example, in the case of a surface material for a disposable diaper or the like, the liquid flow on the surface is increased, and leakage of urine is likely to occur. The fourth durability permeation index which is an index of the water permeability of the non-woven fabric of the present embodiment is 85% or more. If the value of the fourth durability permeable index is less than 85%, for example, in the case of a surface material for a disposable diaper, for a plurality of urinations, the surface material is not permeable to water and loses its function as a surface material, which is likely to cause Leaking urine. Further, the bleed index which is an index of the water permeability of the nonwoven fabric of the present embodiment is preferably 0.8 g or less, more preferably 0.5 g or less. If the value of the osmosis index exceeds 0.8 g, for example, in the case of a surface material for a disposable diaper, the surface material has a very moist touch when it comes into contact with the skin, and the feeling of use is deteriorated. The lower the osmosis index, the better, but the value below 0.01 g is the lower limit of measurement, and the measurement deviation is large. [Examples] Hereinafter, the present invention will be specifically described by way of Examples and Comparative Examples, but the present invention is not limited to the following Examples. Further, the evaluation methods of the respective characteristics are as follows, and the obtained physical properties are shown in Table 1 below. Hereinafter, the traveling direction in the nonwoven fabric manufacturing is referred to as the MD direction, and the direction perpendicular to the direction is referred to as the CD direction. 1. Average fiber diameter (μm) A test piece of 1 cm square was selected in the CD direction of the non-woven fabric, and the diameter of the fiber was measured at 20 points using a microscope VHX-700F manufactured by KEYENCE, and the average value was calculated. 2. Non-woven fabric weight per unit area (g/m 2 According to JIS-L1906, five test pieces in the MD direction of 20 cm × CD direction of 5 cm are selected in the CD direction of the non-woven fabric by the selected position, and the mass is measured, and the average value is converted into the weight per unit area. Weight per unit area (g/m 2 ). 3. Height (thickness) of non-woven fabric without load (μm) Select 10 pieces of test piece with MD direction of 4 mm × CD direction of 10 mm, using SEM (Scanning Electron Microscope) (VE-8800) manufactured by KEYENCE ) Take a photo of the non-woven cross section. The image obtained was an image analysis software manufactured by KEYENCE, and the distance in the thickness direction was measured at five points for each image, and the average value was defined as the height (thickness) (μm) at the time of no load. 4. Maximum height of the non-woven surface (μm) The non-woven fabric is cut in a square shape of 20 mm × 20 mm in any direction. Then, using the 3D distribution function of a digital microscope KH-8700 (manufactured by Hirox), the height information of the surface of the non-woven fabric was measured at intervals of 20 μm in each direction of 20 mm in the direction of each side of the non-woven fabric. The height information obtained in each of 20 mm × 20 mm of each side of the non-woven square is divided every 100 μm, and the length of the division at this time is taken as the measurement reference length. Further, the difference between the maximum value and the minimum value in the block is taken as the maximum height of the surface of the nonwoven fabric. This measurement sequence is schematically shown in Fig. 1. The ratio of the maximum height of the non-woven surface to the height (thickness) (μm) when the non-woven fabric is not loaded is calculated by the height (thickness) (μm) × 100 at the maximum height (μm) / no load. Further, the number of blocks in which the ratio of the maximum height to the height (thickness) of the non-woven fabric without load is 30% or more is divided by the direction of each side of the square of the non-woven fabric by 20 mm × 20 mm, and the reference length is 100 μm. The ratio (%) is calculated by the number of 40,000 blocks. 5. Index (X-ray CT) A test piece of 5 mm × CD direction of 5 mm in the MD direction was arbitrarily cut and measured with a field of view of about 3 mm × 3 mm at the time of image analysis. The measurement apparatus was measured by a high-resolution 3DX-ray microscope nano3DX (manufactured by Rigaku Co., Ltd.), and was measured by CT measurement of low-energy high-intensity X-rays which obtained contrast even for light elements. The detailed conditions are shown below. X-ray target: Cu X-ray tube voltage: 40 kV X-ray tube current: 30 mA Lens: 1.08 μm/pix Combination: 2 Rotation angle: 180° Projection number: 1000 sheets Exposure time: 10 seconds / camera pixel: 3300 × 2500 Reconstruction: The Feldkamp method performs image analysis on the three-dimensional tomogram obtained by CT measurement, and obtains the orthogonal index 3x (x, y, z) alignment index Ix, Iy, Iz. The thickness direction of the sample to be evaluated is consistent with the z direction. Here, the alignment indexes Ix, Iy, and Iz are the sum of the areas of the fiber surfaces observed in the respective directions of x, y, and z (the sum of the projected projection areas of the fiber surfaces in the respective directions) are set to Ax, respectively. In the case of Ay, Az, Ix=Ax/(Ax+Ay+Az) Iy=Ay/(Ax+Ay+Az) Iz=Az/(Ax+Ay+Az). Ax, Ay, and Az are determined from chromatograms. In this indicator, alignment is performed in a direction where the value is small. Moreover, all of the isotropic structures are 1/3. 6. Compression work amount (WC) A test piece of 5 cm square at 5 points was selected in the CD direction, and was measured using a compression test device (KES-G5) manufactured by Kato Tech. Set the test piece on a metal sample stage with a pressurized area of 2 cm 2 Compression is carried out between the steel plates of a circular plane. The compression speed is 0.067 mm/s and the maximum compression load is set to 3.4 kPa (35 gf/ cm) 2 ). The recovery process is also measured at the same speed and the average of the compression work is calculated. 7. The number of crimps (units/2.54 cm (吋)) The test piece of 5 cm square was selected in the CD direction of the non-woven fabric, and the load of the fiber was not applied to the fiber by the microscope VH-Z450 manufactured by KEYENCE. Five fibers were selected, and the number of crimps per one length was measured, and the number of crimps (number / 吋) was calculated from the average value. 8. Permeability 45 degree inclined flow length value (mm) 10 sheets of toilet paper (HARD SINGLE 1R55m manufactured by Itoman Co., Ltd.) were superposed on the plate inclined at 45 degrees as an absorber, and a test cloth (20 cm square) was placed thereon. ), 0.1 cc of physiological saline was added dropwise from a height of 10 mm above the cloth. The distance from which the physiological saline flows from the dropping position to the end of absorption is read. The measurement was carried out at any 20 points in the test cloth, and the average value thereof was taken as a water-permeable 45-degree inclined flow length value (mm). 9. Durable water permeability index (%) 10 sheets of toilet paper (HARD SINGLE 1R55m manufactured by Itoman Co., Ltd.) were superposed as an absorbent body, and a test cloth (20 cm × 30 cm) was placed thereon. Further, a stainless steel plate having a hole of 1.5 cm in diameter was placed at an interval of 10 intervals, and 0.3 cc of physiological saline was dropped from a height of 10 mm above the cloth of each hole. After 3 minutes, the same again. Add dropwise. After the third dropwise addition, the number of holes (A) absorbed within 10 seconds was counted. This test was carried out on the same sample 40 and {((A)/(hole 10 × sample 40) × 100)} was taken as the third water permeability endurance index (%). In addition, after the fourth addition, the number of holes (B) absorbed within 10 seconds is counted in the same manner as in the third time, and {((B)/(hole 10 × sample 40) ×100)} as the fourth water permeability endurance index (%). 10. The osmosis index (g) The test cloth was placed on three sheets of specific filter paper (GRADE: 989, manufactured by Ahlstrоm Co., Ltd.) in order to set the characteristics of the absorber in advance as an absorber. Furthermore, a plate of 10 cm square was placed above it and a plate with a diameter of 25 mm (about 800 g) was opened in the center, and physiological saline (3.5 times the weight of the absorbent body) was dropped from the height of 25 mm above the central hole and It absorbs. Next, remove the plate above the test cloth and gently place a 3.5 kg weight (10 cm square) and take 3 minutes to make the distribution of the liquid in the absorber constant. Then, temporarily remove the 3.5 kg weight and quickly place two pre-weighed measurement filter papers (ERTWWS SHEETS manufactured by HOLLINGSWORTH & VOSE.CONPANY, 12.5 cm square) on top of the test cloth, and gently place 3.6 kg again. Weight. After 2 minutes, the weight increase of the measurement filter paper was weighed. The value (g) of the increase amount was taken as the osmosis index. 11. Coating amount (wt%) of the water-permeable agent aqueous solution The value calculated by the following formula is used as the coating amount (wt%) of the water-permeable agent aqueous solution by the amount of the water-permeable agent aqueous solution consumed for one hour. Coating amount (wt%) = water-permeable agent aqueous solution consumption (g) / {non-woven basis weight (g/m) 2 × width (m) × processing speed (m / min) × 60 (min) } × 100 12. Water-permeable agent pure adhesion amount (wt%) for 24 hours humidity control at 25 ° C × 40% RH temperature and humidity The weight (W1) of the non-woven fabric sample to which the water permeable agent is attached and the weight (W2) of the water permeable agent obtained by Soxhlet extraction from the nonwoven fabric sample are measured, and the pure adhesion amount of the water permeable agent is determined by the following formula. (wt%). C (wt%)=[W2/W1]×100 The sample of the non-woven fabric sample is cut at a distance of 30 cm from 5 points in the MD direction at 5 cm intervals in the CD direction at intervals of 5 in the width of the non-woven fabric. The 10 cm range and the non-woven sample were cut to a length of about 2 g, and a total of 10 test cloths were selected. The above measurement was carried out and the average value of these was taken as the pure adhesion amount (wt%) of the water permeable agent. 13. The non-woven fabric was selected by dispersion at 50 cm × 50 cm, and classified by the following evaluation criteria based on the appearance of the non-woven fabric. The viewpoint of the dispersion evaluation is whether or not the streaks such as stripes are irregular, or whether the single yarn is uniformly spread (whether or not it is not blocky). The higher the level, the better the dispersion. 5: Very good 4: Good 3: Normal (level that can be used as a product) 2: Poor 1: Very poor [Example 1] The MFR was 55 g/10 min (according to JIS-K7210, at a temperature of 230 ° C, A polypropylene (PP) resin having a weight of 2.16 kg as a first component, and a high-density polyethylene having a MI of 26 g/10 min (measured according to JIS-K7210 at a temperature of 190 ° C and a load of 2.16 kg) (HDPE) resin as the second component, the discharge amount of the first component is 0.4 g/min·hоle by the spunbonding method at a spinning temperature of 220 ° C, and the discharge amount of the second component is 0.4 g/min·hоle A fiber having a total discharge amount of 0.8 g/min·hоle and a ratio of the first component to the second component of 1/1 was extruded at a spinning speed of 3200 m/min toward a moving capturing surface using a high-speed airflow pulling device by air jet. The filament group was prepared into an eccentric sheath-core composite long fiber fabric having an average fiber diameter of 17.9 μm. Then, for the obtained fabric, the fibers were adhered to each other by a hot air having a hot air temperature of 142 ° C and a hot air wind speed of 0.7 m / s to obtain a basis weight of 18 g / m. 2 The composite long-fiber non-woven fabric with a crimping number of 15/吋. Then, the 3 wt% aqueous solution of the water permeable agent containing a mixture of hexaglycerol monostearate, polyether modified polyxanthine and polyoxyalkylene ricinoleate was adjusted to a liquid temperature of 20 ° C and a liquid viscosity of 3.2 mPa. s was applied to the above-mentioned nonwoven fabric by a rotor wetting method as a water-permeable agent aqueous solution for the obtained nonwoven fabric so that the coating amount was 10 wt%. The rotor used was 80 mm in diameter, and each rotor was arranged at a distance of 115 mm in the CD direction so that the distance between the center of the rotor and the applied non-woven fabric became 180 mm. Further, the rotor rotation speed was adjusted so that the sprayed aqueous solution of the water-permeable agent aqueous solution had a spray particle size of 35 μm. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 85%, and the water permeability of the non-woven fabric is permeable. The 45-degree inclined flow length is 16 mm, the fourth durable water permeability index is 99%, and the rewet index is 0.12 g. The results are shown in Table 1 below. [Example 2] In the same manner as in Example 1, an average fiber diameter of 17.9 μm and a basis weight of 10 g/m were obtained. 2 The eccentric sheath-core composite long-fiber non-woven fabric with a crimping number of 15/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 87%, and the non-woven fabric is permeable. The 45-degree inclined flow length is 14 mm, the fourth durable permeable index is 99%, and the rewet index is 0.50 g. The results are shown in Table 1 below. [Example 3] The discharge amount of the first component was 0.54 g/min·hоle, the discharge amount of the second component was 0.26 g/min·hоle, and the total discharge amount was 0.80 g/min·hоle, the first component and the second component. An eccentric sheath-core composite long fiber fabric having an average fiber diameter of 17.9 μm was prepared in the same manner as in Example 1 except that the ratio of the components was about 2/1. For the obtained eccentric sheath-core composite long-fiber fabric, the fibers were adhered to each other by hot air having a hot air temperature of 145 ° C and a hot air velocity of 1.0 m/s to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a number of crimps of 10/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 74%, and the water permeability of the non-woven fabric is permeable. The 45-degree inclined flow length is 16 mm, the fourth durable water permeability index is 99%, and the rewet index is 0.12 g. The results are shown in Table 1 below. [Example 4] An average fiber diameter of 17.9 μm and a basis weight of 18 g/m were obtained in the same manner as in Example 3. 2 The composite long-fiber non-woven fabric with a number of crimps of 10/吋. The 1 wt% aqueous solution of the water permeable agent was adjusted to a liquid temperature of 20 ° C, a liquid concentration of 2.3 mPa·s, and a gravure pattern of 120 mesh and a cell volume of 22 cm was used for gravure coating. 3 /m 2 The gravure roll was applied to the obtained composite long-fiber nonwoven fabric in such a manner that the coating amount was 30% by weight, and then dried and wound up by a tumble dryer at 120 °C. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45-degree inclined flow length is 17 mm, the fourth durable permeable index is 97%, and the rewet index is 0.22 g. The results are shown in Table 1 below. [Example 5] The first component was set to the same polypropylene resin as in Example 1, and the second component was set to MI of 16.8 g/10 min (according to JIS-K7210, at a temperature of 190 ° C and a load of 2.16 kg). The linear low-density polyethylene (LLDPE) resin measured by the spinning method has a discharge amount of 0.54 g/min·hоle at a spinning temperature of 220 ° C, and a discharge amount of the second component is 0.26 g/min·hоle and a total discharge amount of 0.8 g/min·hоle, a ratio of the first component to the second component of about 2/1, which is extruded toward the moving capturing surface using a high-speed airflow pulling device by air jet. The filament group was prepared into an eccentric sheath-core long fiber fabric having an average fiber diameter of 20.5 μm. For the obtained eccentric sheath-core long-fiber fabric, the fibers were adhered to each other by hot air having a hot air temperature of 150 ° C and a hot air wind speed of 0.3 m/s to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 40/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45-degree inclined flow length is 15 mm, the fourth durable permeable index is 99%, and the rewet index is 0.35 g. The results are shown in Table 1 below. [Example 6] An average fiber diameter of 20.5 μm and a basis weight of 18 g/m were obtained in the same manner as in Example 5. 2 The eccentric sheath-core composite long-fiber non-woven fabric with a crimping number of 40/吋. Then, the aqueous solution of the water-permeable agent similar to that of Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions except that the concentration of the aqueous solution of the water-permeable agent was 5 wt%. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45-degree inclined flow length is 13 mm, the fourth durable permeable index is 99%, and the rewet index is 0.47 g. The results are shown in Table 1 below. [Example 7] An eccentric sheath-core composite long fiber fabric having an average fiber diameter of 17.9 μm was prepared in the same manner as in Example 1. Then, the obtained eccentric sheath-core composite long-fiber non-woven fabric was passed through a flat roller and an embossing roller at 100 ° C (pattern specification: circular, misaligned, 4.4 mm in diameter, lateral spacing 4.4 mm, longitudinal spacing 4.4 mm) Between the crimping area ratios of 7.9%, the fibers were temporarily brought into contact with each other, and then the fibers were adhered to each other by a hot air having a hot air temperature of 142 ° C and a hot air velocity of 0.7 m/s to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 17/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45 degree sloping flow length is 18 mm, the fourth durable permeable index is 95%, and the rewet index is 0.18 g. The results are shown in Table 1 below. [Example 8] An average fiber diameter of 17.9 μm and a basis weight of 8 g/m were obtained in the same manner as in Example 7. 2 The eccentric sheath-core composite long-fiber non-woven fabric with a crimping number of 17/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 74%, and the water permeability of the non-woven fabric is permeable. The 45 degree sloping flow length is 16 mm, the fourth durable permeable index is 97%, and the rewet index is 0.42 g. The results are shown in Table 1 below. [Example 9] Using the same components as in Example 1, the discharge amount of the first component was 0.40 g/min·hоle by the spunbonding method at a spinning temperature of 220 ° C, and the discharge amount of the second component was 0.40. g/min·hоle and the total discharge amount was 0.8 g/min·hоle, and the ratio of the first component to the second component was 1/1. A side-by-side composite long fiber fabric having an average fiber diameter of 17.9 μm was prepared by extruding the filament group at a spinning speed of 3200 m/min toward the moving capturing surface using a high-speed air stream pulling device using air jet. Then, with respect to the obtained side-by-side type composite long fiber fabric, the fibers were adhered to each other in the same manner as in Example 7 to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 23/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) of the non-woven fabric without load is 30% or more is 76%, and the nonwoven fabric is not woven. The permeable flow length of 45 degrees is 15 mm, the fourth durability permeable index is 99%, and the rewet index is 0.15 g. The results are shown in Table 1 below. [Example 10] The first component was made into polyethylene terephthalate (PET) having a solution viscosity of 0.75 ηsp/c, and the second component was made into high-density polyethylene (HDPE) similar to that of Example 1. The amount of the first component to be extruded at a spinning temperature of 295 ° C by the spunbonding method was 0.54 g/min·hоle, the discharge amount of the second component was 0.26 g/min·hоle, and the total discharge amount was 0.80 g/min.・hоle, a fiber having a ratio of the first component to the second component of about 2/1, and extruding the filament group toward the moving capturing surface by using a high-speed airflow pulling device by air jet to prepare an eccentric sheath having an average fiber diameter of 18.7 μm. Core composite long fiber fabric. With respect to the obtained eccentric sheath-core composite long fiber fabric, the fibers were adhered to each other in the same manner as in Example 1 to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 20/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 87%, and the non-woven fabric is permeable. The 45-degree inclined flow length is 15 mm, the fourth durable water permeability index is 99%, and the rewet index is 0.15 g. The results are shown in Table 1 below. [Example 11] Using the same components as in Example 1, the discharge amount of the first component was 0.24 g/min·hоle, the discharge amount of the second component was 0.56 g/min·hоle, and the total discharge amount was 0.8 g/min. In the same manner as in Example 1, an eccentric sheath-core composite long fiber fabric having an average fiber diameter of 17.9 μm was prepared in the same manner as in Example 1 except that the ratio of the first component to the second component was 3/7. With respect to the obtained eccentric sheath-core composite long fiber fabric, the fibers were adhered to each other in the same manner as in Example 1 to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 17/吋. Then, the same aqueous solution of the water-permeable agent as in Example 4 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) of the non-woven fabric without load is 30% or more is 70%, and the nonwoven fabric is not woven. The permeable flow length of 45 degrees is 18 mm, the fourth durability permeable index is 95%, and the rewet index is 0.18 g. The results are shown in Table 1 below. [Example 12] Using the same components as in Example 1, the discharge amount of the first component was 0.16 g/min·hоle, the discharge amount of the second component was 0.64 g/min·hоle, and the total discharge amount was 0.8 g/min. In the same manner as in Example 1, except that the ratio of the first component to the second component was 1:4, an eccentric sheath-core composite long fiber fabric having an average fiber diameter of 18.7 μm was prepared. With respect to the obtained eccentric sheath-core composite long fiber fabric, the fibers were adhered to each other in the same manner as in Example 1 to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 5/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) of the non-woven fabric without load is 30% or more is 52%, and the nonwoven fabric is not woven. The permeable flow length of 45 degrees is 22 mm, the fourth durability permeable index is 85%, and the osmosis index is 0.45 g. The results are shown in Table 1 below. [Example 13] Using the same components as in Example 1, the discharge amount of the first component was 0.40 g/min·hоle by the spunbonding method at a spinning temperature of 220 ° C, and the discharge amount of the second component was 0.40. g/min·hоle and the total discharge amount is 0.8 g/min·hоle, and the ratio of the first component to the second component is 1:1. The extruded filaments were stretched in the traction region by the suction force of the moving capturing surface, and then deposited on the moving capturing surface by a diffuser to prepare a side-by-side composite long fiber fabric having an average fiber diameter of 20.5 μm. Then, with respect to the obtained side-by-side type composite long fiber fabric, the fibers were adhered to each other in the same manner as in Example 1 to obtain a basis weight of 18 g/m. 2 The composite long-fiber non-woven fabric with a crimping number of 25/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) of the non-woven fabric without load is 30% or more is 90%, and the nonwoven fabric is not woven. The permeable flow length of 45 degrees is 14 mm, the fourth durability permeable index is 99%, and the rewet index is 0.17 g. The results are shown in Table 1 below. [Example 14] An average fiber diameter of 20.5 μm and a basis weight of 30 g/m were obtained in the same manner as in Example 13. 2 The eccentric sheath-core composite long-fiber non-woven fabric with a crimping number of 25/吋. Then, the same aqueous solution of the water-permeable agent as in Example 1 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 89%, and the water permeability of the non-woven fabric is permeable. The 45-degree inclined flow length is 14 mm, the fourth durable permeable index is 99%, and the rewet index is 0.12 g. The results are shown in Table 1 below. [Example 15] Using a spinning head equipped with a figure-shaped shaped nozzle, a polypropylene (PP) having an MFR of 38 g/10 min was extruded at a spinning temperature of 240 ° C and a discharge amount of 0.80 g / min·hоle. The filament group was extruded toward the moving capturing surface by a high-speed air stream pulling device of air jet to obtain a long fiber fabric having an average fiber diameter of 18.7 μm. Then, the obtained long fiber fabric was passed through a flat roll and an embossing roll set to a temperature of 135 ° C and a pressure of 60 kg / cm (pattern specification: circular shape with a diameter of 0.425 mm, misalignment arrangement, lateral spacing of 2.1 mm, longitudinal spacing) Between 1.1 mm and a crimp area ratio of 6.3%), the fibers are partially joined to each other to obtain a basis weight of 25 g/m. 2 , the number of crimped 28 / 吋 long fiber non-woven fabric. Then, the same aqueous solution of the water-permeable agent as in Example 4 was applied to the obtained long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45-degree inclined flow length is 23 mm, the fourth durable permeable index is 89%, and the rewet index is 0.12 g. The results are shown in Table 1 below. [Table 1] A polypropylene (PP) resin having a MFR of 55 g/10 min (measured according to JIS-K7210 at a temperature of 230 ° C and a load of 2.16 kg) at a spinning temperature of 220 ° C by a spunbonding method at a spinning temperature of 220 ° C, The filament group was extruded toward the moving trapping surface using a high-speed air stream pulling device using air jet to prepare a long fiber fabric having an average fiber diameter of 17.9 μm. Then, the obtained fabric was passed between a flat roller of 141 ° C and an embossing roller (pattern specification: circular diameter of 0.425 mm, misalignment, lateral spacing of 2.1 mm, longitudinal spacing of 1.1 mm, and crimping area ratio of 6.3%). The fibers are then joined to each other to obtain a weight per unit area of 18 g/m. 2 The long fibers of the uncontracted fibers are not woven. Then, the same aqueous solution of the water-permeable agent as in Example 4 was applied to the obtained long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45 degree sloping flow length is 28 mm, the fourth durable permeable index is 74%, and the rewet index is 0.56 g. The results are shown in Table 2 below. [Comparative Example 2] The long-fiber non-woven fabric obtained in Comparative Example 1 was passed through a continuous honeycomb shape pattern of 0.9 mm in width and 0.1 mm in line width (cavity concave pattern) (pressing area ratio: 12.5%, pattern spacing: longitudinal direction 2.8 mm) Between the embossing roller (80 ° C) with a lateral direction of 3.2 mm and a depth of 0.7 mm) and a rubber roller with a surface hardness of 60 degrees (JIS-A hardness) at 2 kg/cm 2 The pressure presses the pattern. A long fiber non-woven fabric having a high density region and a central convex shape pressed around the shell of the turtle is obtained. Then, the same aqueous solution of the water-permeable agent as in Example 4 was applied to the obtained long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45 degree sloping flow length is 27 mm, the fourth durable permeable index is 80%, and the rewet index is 0.68 g. The results are shown in Table 2 below. [Comparative Example 3] Using the same components as in Example 1, the discharge amount of the first component was 0.72 g/min·hоle by the spunbonding method at a spinning temperature of 220 ° C, and the discharge amount of the second component was 0.08. G/min·hоle and a total discharge amount of 0.8 g/min·hоle, a ratio of the first component to the second component of 9/1, and the high-speed airflow pulling device using air jet is used to extrude the length toward the moving capturing surface. For the silk group, an eccentric sheath-core composite long fiber fabric having an average fiber diameter of 16.7 μm was prepared. Then, for the obtained eccentric sheath-core composite long-fiber fabric, the fibers were adhered to each other by hot air having a hot air temperature of 142 ° C and a hot air wind speed of 0.7 m/s to obtain a basis weight of 18 g/m. 2 , a composite long fiber non-woven fabric with a number of crimps of 0/吋. Then, the same aqueous solution of the water-permeable agent as in Example 4 was applied to the obtained composite long-fiber nonwoven fabric under the same coating conditions. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more is 48%, and the water permeability of the non-woven fabric is permeable. The 45 degree sloping flow length is 28 mm, the fourth durable permeable index is 64%, and the rewet index is 0.52 g. The results are shown in Table 2 below. [Comparative Example 4] Using the same components as in Example 1, the discharge amount of the first component was 0.54 g/min·hоle at a spinning temperature of 220 ° C by the spunbonding method, and the discharge amount of the second component was 0.26. G/min·hоle and the total discharge amount is 0.8 g/min·hоle, and the ratio of the first component to the second component is 2/1, and the high-speed airflow pulling device by air jet is used to extrude the length toward the moving capturing surface. For the silk group, a sheath-core composite long fiber fabric having an average fiber diameter of 16.7 μm was prepared. Then, with respect to the obtained fabric, the fibers were adhered to each other in the same manner and under the same conditions as in Comparative Example 3, and then a water-permeable aqueous solution was applied to obtain a basis weight of 18 g/m. 2 , a composite long fiber non-woven fabric with a number of crimps of 0/吋. The ratio of the maximum height in the block when the measurement reference length of the surface of the obtained non-woven fabric is 100 μm to the height (thickness) when the non-woven fabric has no load is 30% or more, and the ratio of the non-woven fabric is permeable. The 45 degree slope flow length is 26 mm, the fourth durability permeable index is 73%, and the rewet index is 0.60 g. The results are shown in Table 2 below. [Table 2] [Industrial Applicability] The hydrophilic fluffy nonwoven fabric of the present invention has excellent water permeability, and thus can be preferably used for the production of sanitary materials. Regarding the sanitary material, it can be preferably used for the top sheet of the surface of disposable diapers, menstrual sanitary napkins or incontinence pads. Moreover, the hydrophilic fluffy nonwoven fabric of the present invention is not limited to the above applications, and can also be used, for example, for a mask, a hearth, a tape backing cloth, a patch base cloth, a wound base cloth, a packaging material, a wiping product, a medical robes, a bandage. , clothing, skin care sheets, etc.