以下，對本發明之實施形態加以詳細說明。 構成本實施形態之不織布之複合長纖維包含2種以上之熱塑性樹脂之組合。作為熱塑性樹脂，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，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等。只要發揮所需之作用效果，則可為上述熱塑性樹脂之任意組合，就纖維彼此之接合性之觀點而言，較佳為存在熔點差之熱塑性樹脂之組合。 其中就質感之觀點而言，較佳為將聚烯烴系樹脂組合使用。例如可列舉由聚乙烯、聚丙烯、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。 就容易獲得捲縮絲之方面而言，本實施形態之熱塑性複合纖維之纖維形狀較佳為並列型(S/S)、偏芯型(偏S/C)。偏芯型之芯部亦可於纖維表面露出，芯部於纖維表面中所占之面積率較佳為0～50%，進而較佳為0～30%。形成纖維表面之芯部之比率越低，由接著所引起之鞘部之比率越變高，可獲得較高之強度及絨毛抑制性。又，就纖維強度之觀點而言，熱塑性樹脂之組合中熔點較高之樹脂於纖維內所占之重量比率為20 wt%以上且80 wt%以下，較佳為30 wt%以上且80 wt%以下，進而較佳為50 wt%以上且70 wt%以下。 纖維形狀不僅可為通常之圓形纖維，亦可為異形纖維等特殊形態之纖維。 於由2種熱塑性樹脂形成複合長纖維之情形時，較佳為第1成分為聚丙烯，第2成分為聚乙烯。於複合纖維為偏芯型之情形時，較佳為將芯部設為第1成分，將鞘部設為第2成分。聚丙烯係強度較強，於使用時不易斷裂，生產衛生材料時之尺寸穩定性優異，故而較佳。 於由上述2種熱塑性樹脂形成之情形時，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。就質感、強度、尺寸穩定性之觀點而言，較佳為將均聚丙烯作為主成分者。 又，聚丙烯之MFR(melt mass flow rate，熔體質量流率)之下限可為20 g/10 min以上，較佳為超過30 g/10 min，進而較佳為超過40 g/10 min，最佳為超過53 g/10 min。上限可為85 g/10 min以下，較佳為70 g/10 min以下，最佳為60 g/10 min以下。MFR之測定方法係按照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種熱塑性樹脂形成之情形時，第2成分之聚乙烯係纖維彼此之接合後之接著強度較強，作為不織布之質感良好，故而可較佳地用於衛生材料。又，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
，進而較佳為0.925～0.96 g/cm3
。 又，聚乙烯之MI(Melt Index，熔融指數)之下限可為10 g/10 min以上，較佳為超過15 g/10 min。上限可為100 g/10 min以下，較佳為60 g/10 min以下，最佳為40 g/10 min以下。MI之測定方法係按照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。 就強度或生產性之觀點而言，本實施形態之不織布較佳為藉由紡黏法形成複合長纖維不織網而製造。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複合長纖維。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高速牽引。自牽引裝置伸出之絲線於搬送機上堆積並以不織網之形式被搬送。亦可將搬送中之不織網積層而製成多層積層之不織網。 於將由熱塑性複合纖維構成之不織網接合而形成不織布之情形時，作為接合手段，只要為加熱至纖維彼此之交點可熔融並接著之溫度以上的方法，則並無特別限定。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進行加熱之方法。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。 熱風之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。例如於該熱塑性樹脂為聚乙烯之情形時，為使聚乙烯熔融並接著之130～155℃，較佳為135～155℃，進而較佳為140℃～150℃。若接著溫度為該範圍，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。 繼而，熱風之風速為0.5～3.0 m/s，較佳為0.7～2.5 m/s，進而較佳為2.0 m/s以下。 藉由熱風將本實施形態之不織網接合時，不織網之透氣度對其接合狀態之影響較大。若不織網之透氣度過低，則熱風不易貫通，難以獲得作為不織布之均勻之接合。另一方面，就保持所獲得之不織布之強度之觀點而言，透氣度過高亦欠佳。作為可令人滿意地保持接合強度的最終獲得之不織布之透氣度，較佳為300 cm3
/cm2
/s以上且700 cm3
/cm2
/s以下，更佳為300 cm3
/cm2
/s以上且650 cm3
/cm2
/s以下。 本說明書中，所謂「熱壓接部形狀指數」，係指以藉由壓紋輥或熱風處理等進行接合而形成於不織布表面之部分熱壓接部、即經熱熔合之熔合面積率與每一定面積之熔合周長所界定者。所謂熔合面積率，係指長纖維不織布之熔合部面積於該不織布之總體面積中所占之比率，所謂每一定面積之熔合周長，係指長纖維不織布每20平方毫米所包含之熔合部之周長之總和。此處，於產生纖維交點之熔合但纖維交點之熔合於與肌膚接觸之面露出之情形時，包含纖維交點之纖維表面而設為熔合部並作為膜化之部分算入至熔合面積及熔合周長。 作為不織布與肌膚接觸並給予物理刺激之部位，可列舉不織布之接觸面之短纖維端或表面之絨毛。又，於包含藉由壓紋輥等進行熱壓接而成之長纖維不織布之不織布中，短纖維端並未於不織布之表面露出，不易產生由纖維端所致之物理刺激，但於為了防止表面之起毛而熱壓接面積過大之情形或因熱壓接壓力過大而熔合部之周邊部之凹凸較深之情形時，不僅質感較差，而且熱壓接部之周邊部會導致物理刺激。即，若因熔合而膜化之面積率較高，則不織布變硬，於摩擦時摩擦刺激較大而損傷肌膚。又，熱熔合部之周邊部係熱熔合部成為凹部，非熱熔合部成為凸部，凹凸差較大，於摩擦時不織布表面之熔合部之周邊部牽扯肌膚表面而導致損傷。即，熔合面積率、及熔合部周長之大小與摩擦時之損傷密切相關。若不織布之熱壓接部形狀指數較大，則該不織布係絨毛之產生得到抑制，可防止由絨毛引起之瘙癢、紮刺感等不良之手指觸感，但因膜化之較硬部分而對肌膚造成物理刺激。另一方面，若不織布之熱壓接部形狀指數較小，則因膜化之較硬部分與肌膚接觸所致之物理刺激變小，進而，不織布變得蓬鬆而質感良好。然而，若熱壓接部形狀指數過小，則該不織布無法獲得實用上而言充分之強度，進而因摩擦而容易產生絨毛，由絨毛所致之物理刺激而瘙癢、紮刺感等手觸感變差。鑒於上述情況，於本實施形態中，「熱壓接部形狀指數」必須為0.05以上且未達1.9。若熱壓接部形狀指數未達0.05，則就防止絨毛之方面而言欠佳，若超過1.9則蓬鬆之質感受損，就壓縮時之體積感、膨脹感之方面而言欠佳。「熱壓接部形狀指數」更佳為1.8以下，更佳為1.5以下。「熱壓接部形狀指數」更佳為0.1以上，更佳為0.3以上。 於設想用作衛生材料之頂部片材的情況之情形時，本實施形態之不織布必須使模擬皮膚模型之最大擦傷深度為0 μm以上且10 μm以下，且累計擦傷深度為0 μm以上且80 μm以下。所謂模擬皮膚模型之最大擦傷深度、及累計擦傷深度，係指依據下述測定法，以初始壓縮應力為98 mN/cm2
之模擬皮膚模型對與肌膚接觸之不織布進行摩擦時，於模擬皮膚模型表面出現之損傷之最大擦傷深度及損傷之累計擦傷深度。此處所謂之損傷，係指使不織布與模擬皮膚模型摩擦而產生之由不織布造成的模擬皮膚模型之物理性之表面形狀變化。若最大擦傷深度超過10 μm，則就對肌膚之物理刺激之方面而言欠佳，更佳為9 μm以下。又，若累計擦傷深度超過80 μm則欠佳，更佳為60 μm以下，進而較佳為50 μm以下。 即，不織布所具有之摩擦刺激性係根據與模擬皮膚模型之摩擦所造成之物理性刺激之程度，於模擬皮膚模型上以損傷數量、損傷深度、損傷寬度之形式表現。模擬皮膚模型之表面係調整得平坦而使用，給予摩擦刺激前之表面之微細凹凸並不視為損傷。藉由該最大擦傷深度及損傷之累計擦傷深度對相同組成之模擬皮膚模型進行比較評價，藉此可比較不織布之摩擦刺激之程度。 若由多名官能檢查員對因不織布與模擬皮膚模型之摩擦而產生之損傷之最大損傷深度及累計擦傷深度、和由不織布與實際肌膚之摩擦所致的物理刺激性之關係進行研究，則可確認最大擦傷深度及累計擦傷深度越大之不織布，以不織布實際摩擦肌膚時越有強烈感到刺激之傾向，若觀察摩擦後之皮膚表面之狀態，則有肌理之消失亦較大之傾向。根據該結果，對藉由以不織布摩擦模擬皮膚模型而產生之損傷之最大摩擦深度及累計擦傷深度進行測定，藉此可評價與肌膚接觸之不織布對肌膚之摩擦刺激性。根據本發明人等之研究判明，若該最大擦傷深度超過10 μm，累計擦傷深度超過80 μm，則與肌膚接觸之不織布對肌膚之摩擦刺激較大，容易損傷肌膚。 於本實施形態中，不織布之「表面絨毛指數」較佳為3以上。若表面絨毛指數未達3，則因與皮膚之摩擦等而於不織布表面產生絨毛，導致紮刺之肌膚觸感，進而因摩擦而導致對皮膚表面造成物理刺激。 於本實施形態中，不織布之摩擦係數之變動值(MMD)之縱橫平均值較佳為0.015以下。若超過0.015，則就肌膚觸感之光滑度、物理刺激之大小方面而言欠佳，更佳為0.017以下，更佳為0.015以下。 與皮膚之摩擦包括對縱向及橫向此兩個方向之摩擦，較佳為任一方向之摩擦係數均較低，光滑而阻力較少。然而，於縱向與橫向之摩擦阻力之大小產生差異之情形時，摩擦阻力之應力集中於縱向及橫向中摩擦係數之值較小之方向，其結果為，縱向與橫向之摩擦阻力應力被平均化。因此，重要的是將摩擦係數之變動值之縱橫平均值作為表示對皮膚之物理刺激之荷重之值。 產生摩擦阻力之大小之差異，摩擦阻力應力被平均化之原因在於：於摩擦係數之變動值之縱向、橫向之值中，若較小方向之摩擦係數之變動值與較大方向之摩擦係數之變動值的比率超過20倍，則較大方向之值之影響變高，即便摩擦係數之變動值之縱橫平均值為0.015以下，肌膚觸感亦成為粗糙之肌膚觸感。 本實施形態之不織布之由X射線CT所得之配向指標較佳為0.43以下，更佳為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，成為即便於荷重下體積亦不會潰縮、具有蓬鬆性之不織布，可獲得具有優異之緩衝性之不織布。下限越低越好，但較佳為0.30以上，更佳為0.33以上。 為了提高不織布之厚度方向之纖維配向，重要的是控制不織布之接合步驟中之熱風溫度及風速、不織網之透氣度。若熱風溫度較高，則纖維表面之熔解度變得非常高，質感變硬。若熱風風速較快，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。進而，若不織網之透氣度過低，則熱風無法貫通，若過高則熱風無法對纖維交點施加充分進行熔解之熱，因此難以形成兼顧體積與強度之纖維接著點。本實施形態之不織布之鬆密度較佳為處於0.01 g/cm3
以上且0.07 g/cm3
以下之範圍，就強度之觀點而言，更佳為0.03 g/cm3
以上，就質感之觀點而言，進而較佳為設為0.07 g/cm3
以下。 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0.25 gf・cm/cm2
以上且0.80 gf・cm・cm2
以下。就作為用於衛生材料之不織布之緩衝性之觀點而言，較佳為保持該範圍之壓縮作功量WC。 構成本實施形態之不織布的複合長纖維之平均單紗纖度較佳為0.5 dtex以上且10.0 dtex以下，更佳為0.7 dtex以上且8.0 dtex以下，進而較佳為0.9 dtex以上且5.0 dtex以下。就紡絲穩定性之觀點而言，較佳為0.5 dtex以上，就用於衛生材料之不織布之質感之觀點而言，較佳為10.0 dtex以下。 就保持不織布之質感及蓬鬆之觀點而言，上述複合長纖維較佳為具有螺旋狀之捲縮。該纖維之捲縮數較佳為5個/吋以上且45個/吋以下，更佳為10個/吋以上且40個/吋以下。若捲縮數未達5個/吋，則所獲得之不織布之蓬鬆不足，若超過45個/吋，則因所獲得之不織布之纖維分散不均而使外觀受損。 本實施形態之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，則滿足作為本案目的之用於衛生材料之不織布之柔軟性，外觀上不會造成過厚之印象。 本實施形態之不織布亦可含有親水化劑。作為所使用之親水化劑，考慮到對人體之安全性、步驟中之安全性等，較佳為單獨或以混合物之形式使用高級醇、高級脂肪酸、烷基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。 作為含有親水化劑之方法，通常可使用經稀釋之親水化劑，採用浸漬法、噴霧法、塗佈(接觸式塗佈機、凹版塗佈機、模嘴塗佈機)法等現有之方法，較佳為視需要利用水等溶劑將預先經混合之親水化劑稀釋並進行塗佈。 若利用水等溶劑將親水化劑稀釋並進行塗佈，則存在需要進行乾燥步驟之情形。作為此時之乾燥方法，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或者利用熱接觸之乾燥方法等。 親水化劑之附著量視所要求之性能而不同，通常相對於纖維而較佳為0.05重量%以上且1.00重量%以下之範圍，更佳為0.15重量%以上且0.8重量%以下，進而較佳為0.2重量%以上且0.6重量%以下。若附著量處於該範圍，則滿足作為衛生材料之頂部片材之親水性能，加工適性亦變得良好。 於對不織布賦予親水化劑進行親水性提昇處理而用作衛生材料之頂部片材之情形時，由於尿或血液透過不織布表面，故而不殘留於肌膚，減少氨等之化學刺激，對肌膚之物理刺激較小，且不易損傷肌膚，故而針對化學刺激亦不易產生皮膚炎等炎症。 本實施形態之不織布係藉由使用包含2種以上之熱塑性樹脂的複合長纖維不織布並調整與肌膚接觸之面之熔合部而達成。由於使用複合長纖維不織布，故而複合纖維之低熔點成分於一部分纖維交點未完全膜化之情況下熱熔合接合，因此與肌膚接觸時，不會損及纖維之自由度，且不會於膜化部分產生應力集中，因此物理刺激變小。又，藉由纖維交點之熱熔合接合，而達成實用上之強度及防絨毛。 長纖維不織布之構成纖維之自由度係由熱壓接等所形成之膜化部分與複合纖維之低熔點成分之熱熔合接合之程度所決定，且以長纖維不織布之韌性指數表示。所謂韌性指數係指將不織布之斷裂與斷裂伸長率之積除以不織布之單位面積重量所得之值，較佳為40以上且250以下，更佳為50以上且150以下。 [實施例] 藉由實施例具體地說明本發明，但本發明並不限定於該等實施例。 藉由以下方法測定實施例中之不織布之各特性。 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，將生產線方向且纖維之行進方向稱為MD(Machine Direction，縱向)方向，將與纖維之行進方向為直角之方向且寬度方向稱為CD(Cross Direction，橫向)方向。 (1)平均單紗纖度(dtex) 選取1 cm見方之試片作為樣本，利用KEYENCE公司製造之顯微鏡VHX-700F於各20點分別測定纖維之直徑，並根據其平均值算出纖度。 (2)單位面積重量(g/m2
) 依據JIS-L1906，任意選取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。 (3)透氣度(cm3
/cm2
/s) 依據JIS L-1096所記載之弗雷澤(Frazir)法進行測定。選取10點進行測定並算出測定值之平均值。 (4)捲縮數 於CD方向選取5點之5 cm見方之試片作為樣本，使用KEYENCE製造之顯微鏡VH-Z450於未對試片中之纖維施加荷重之狀態下測定每1吋(2.54 cm)之捲縮數，並根據其平均值算出捲縮數。 (5)最大擦傷深度、及累計擦傷深度 (a)自不織布之任意位置製作3點5 cm×5 cm之試樣。 (b)將試樣安裝於Kato Tech(股)公司製造之摩擦感測試機(KES-SE)之摩擦端子。 (c)於接觸壓力4.9×103
Pa、接觸面積1 cm2
、摩擦距離2 cm之條件下使用上述摩擦感測試機對試樣與下述初始壓縮應力98 mN/cm2
之模擬皮膚模型進行1次摩擦。 (d)使用非接觸式雷射測量機測定模擬皮膚模型表面之因摩擦而產生之寬度1 cm、摩擦方向2 cm之摩擦痕跡之中央部分、相對於摩擦方向正交之方向1 cm寬之最大擦傷深度、累計擦傷深度。 (e)對在試樣之縱向及橫向分別以1 cm間隔對10處進行摩擦時之模擬皮膚模型表面之最大擦傷深度、累計擦傷深度進行測定，並將縱橫平均作為試片之最大擦傷深度、累計擦傷深度。樣品之最大擦傷深度、累計擦傷深度係設為上述3點之平均值。 [模擬皮膚模型之製造方法] 使用將1份瓊脂(AGAR POWDER，和光純藥公司製造，試劑)、8份明膠(GIFCO公司製造，試劑)溶解於91份水中後藉由冰箱進行固化而成者。將表面調整得平坦。 初始壓縮應力係指使用手持壓縮試驗機KES-G5(Kato Tech(股)公司製造)以壓縮面積200 mm2
、壓縮速度0.1 mm/sec對模擬皮膚模型進行測定時移位0.1 mm時之壓縮應力。視需要對所加入之水添加量進行微調而使初始壓縮應力合適。 (6)熱壓接部形狀指數 (a)自不織布之任意位置選取5 cm×5 cm之試樣。 (b)自上述試樣製作25片1 cm×1 cm之試樣並利用顯微鏡拍攝表面，獲得25張25倍之放大照片。 (c)根據所獲得之照片求出不織布之熔合部面積於不織布表面積中所占之比率。 (d)根據所獲得之照片求出表示每一定面積20平方毫米所包含之熔合而膜化之部分之周長總和之值。 (e)藉由下述數式(1)： 熱壓接部形狀指數＝熱熔合面積率×每一定面積之熔合周長 式(1) {式中，熔合面積率：長纖維不織布之熔合部面積於長纖維不織布之整體面積中所占之比率；每一定面積之熔合周長：長纖維不織布每20平方毫米所包含之熔合部之周長總和}求出熱壓接部形狀指數。熱壓接部形狀指數係設為上述25點之平均值。 (7)摩擦係數之變動值 (a)自不織布之任意位置於3點製作6 cm×8 cm之試樣。 (b)將試樣安裝於Kato Tech(股)公司製造之摩擦感測試機(KES-SE)之測定台。 (c)使用試樣、及摩擦感測試機之標準摩擦端子(10 mm見方之金屬絲端子)於測定荷重25 g/cm2
下測定摩擦係數之變動值(MMD)，並測定試樣之縱橫平均值。 (8)表面絨毛指數 依據JIS P 8136以下述方法實施。 (a)自不織布之任意位置製作3點縱向25 cm、橫向3 cm之試樣。 (b)將試樣貼附於耐摩耗試驗機之試樣台，並將細棉布3號(4 cm×5 cm)安裝於摩擦件。 (c)將摩擦件(500 g)置於不織布上，實施往返計數100次之摩擦試驗。 (d)對摩擦後之不織布表面之絨毛狀態進行官能性評價。按以下之判定基準以3點之平均值表示。 [評價基準：表面絨毛指數] 5分：未觀察到由摩擦引起之絨毛，未確認到由表面摩擦所致之到損傷。 4分：少許確認到由摩擦引起之表面形狀變化，但未確認到絨毛。 3分：觀察到若干由摩擦引起之絨毛，但剝離之纖維端為10根以下。 2分：觀察到由摩擦引起之絨毛，確認到剝離之纖維端為11根以上且49根以下。 1分：因摩擦而大量產生絨毛，確認到剝離之纖維端為50根以上。 (9)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。 (10)鬆密度(g/cm3
) 將不織布之布帛試樣之兩端10 cm去除，以寬度方向成為均等之方式利用孔雀式厚度計(5 g/4 cm2
)於20點進行測定，並算出平均之厚度。根據該平均值使用下式算出鬆密度。 鬆密度(g/cm3
)＝單位面積重量(g/m2
)/厚度(mm)/1000 (11)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，算出壓縮作功量之平均值。 (12)質感 藉由5名檢查員進行之官能評價對樣品之柔軟度進行判定。樣品之質感分為「較硬」或「柔軟」，以5人之平均進行判定。 (13)韌性指數 依據JIS L-1906，於5點選取MD方向20 cm、CD方向5 cm之樣品，利用拉伸試驗機以夾持間隔100 mm、拉伸速度300 mm/min實施縱向之拉伸試驗，根據所測得之斷裂強度及斷裂伸長率藉由下式算出韌性指數。 韌性指數＝斷裂強度(N/50 mm)×斷裂伸長率(%)/單位面積重量(g/m2
) [實施例1～3、比較例1、2] 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・Hole、第2成分之噴出量為0.4 g/min・Hole且總單孔噴出量為0.8 g/min・Hole、將纖維形狀設為偏芯鞘芯結構、第1成分與第2成分之比成為50/50的纖維，使用利用空氣噴射之高速氣流牽引裝置以紡速3,000 m/min朝向移動捕獲面擠出該長絲群，製備平均單紗纖度2.8 dtex之長纖維不織網。 繼而，使熱風溫度142℃、熱風風速0.7 m/s之熱風通過所獲得之不織網，進而藉由將雕刻輥與平滑輥組合而成之熱壓接輥進行壓接處理。對使熱風通過時之搬送速度、熱壓接輥之溫度、壓力、搬送機及捲取裝置之速度進行調整，獲得具有特定之熱壓接部形狀指數之實施例1～3、比較例1、2之平均單紗纖度2.8 Decitex、捲縮數30個/吋、單位面積重量20 g/m2
之複合長纖維不織布。 [實施例4] 將以與實施例2同樣之方式獲得之複合長纖維不織布於室溫22℃之環境下於放電量40 W・min/m2
(放電度4.0 W/cm2
)之條件下通過電暈放電處理機，獲得潤濕張力39 mN/m之不織布。藉由噴霧法對所獲得之不織布賦予聚醚系之親水化劑，繼而於110℃下進行30秒鐘之熱風乾燥，獲得劑濃度附著量成為0.3重量%之長纖維不織布。所獲得之不織布具有可足以用作尿布之頂部片材之性能。 [實施例5] 將MFR為40 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235℃下擠出第1成分之噴出量為0.4 g/min・Hole、第2成分之噴出量為0.4 g/min・Hole且總單孔噴出量為0.8 g/min・Hole、將纖維形狀設為偏芯鞘芯結構、第1成分與第2成分之比成為50/50的纖維，使用冷風擠入型氣流牽引裝置以紡速2,500 m/min朝向移動捕獲面擠出該長絲群，製備平均單紗纖度2.8 dtex之長纖維不織網。 繼而，使熱風溫度145℃、熱風風速1.0 m/s之熱風通過所獲得之不織網而將不織布熱接合。對使熱風通過時之搬送速度、捲取裝置之速度進行調整，獲得具有特定之熱壓接部形狀指數之單位面積重量20 g/m2
之複合長纖維不織布。 [實施例6] 將以與實施例5同樣之方式獲得之複合長纖維不織布於室溫25℃之環境下於放電量40 W・min/m2
(放電度4.0 W/cm2
)之條件下通過電暈放電處理機，獲得潤濕張力39 mN/m之不織布。藉由噴霧法對所獲得之不織布賦予聚醚系之親水化劑，繼而於120℃下進行熱風乾燥，獲得劑濃度附著量成為0.35重量%之長纖維不織布。所獲得之不織布具有可足以用作尿布之頂部片材之性能。 [比較例3] 藉由紡黏法於紡絲溫度220℃下將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)樹脂以單一成分擠出，使用利用空氣噴射之高速氣流牽引裝置以紡速3,000 m/min朝向移動捕獲面擠出該長絲群，製備平均單紗纖度2.8 dtex之長纖維不織網。 繼而，使所獲得之不織網通過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20 g/m2
且透氣度456 cm3
/cm2
/s、纖維未捲縮之熱壓接部形狀指數1.9之長纖維不織布。所獲得之不織布之鬆密度較高，不具有緩衝性，質感較硬。 [比較例4] 將成為第1成分之芯成分為熔點162℃之聚丙烯、成為第2成分之鞘成分為熔點130℃之高密度聚乙烯且纖度2.5 dtex、切割長度38 mm的短纖維作為構成纖維，藉由梳棉法獲得不織網。 繼而，對於所獲得之不織網藉由熱風溫度140℃、熱風風速1.0 m/s之熱風接合將纖維彼此接著，獲得單位面積重量18 g/m2
且透氣度717 cm3
/cm2
/s、捲縮數5個/吋之複合短纖維不織布。所獲得之不織布之伸長率較低，韌性指標較低，質感較硬。 [表1]
[產業上之可利用性] 本發明之複合長纖維不織布具有帶有緩衝性之柔軟度之蓬鬆性及較高之強伸度，因此可較佳地用於衛生材料之製造。作為衛生材料，可較佳地用於拋棄式尿布、經期衛生棉或失禁墊，可作為表面之頂部片材、外側之底層片材使用。又，用途並無限定，例如亦可用於口罩、懷爐、膠帶底布、防水片材底布、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 composite long fiber constituting the nonwoven fabric of the present embodiment contains a combination of two or more thermoplastic resins. Examples of the thermoplastic resin include polyolefin resins such as polyethylene, polypropylene, and copolymerized polypropylene, polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. Copolymerization of polyester resins such as polyester, polyamide-6, nylon-66, copolymerized nylon and other polyamine resins, biodegradability such as polylactic acid, polybutylene succinate, and polyethylene succinate Resin, etc. As long as the desired effect is exerted, it is preferable that any combination of the above thermoplastic resins has a combination of thermoplastic resins having a difference in melting point from the viewpoint of the bondability between the fibers. Among them, from the viewpoint of texture, it is preferred to use a polyolefin resin in combination. For example, 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. The fiber shape of the thermoplastic composite fiber of the present embodiment is preferably a side-by-side type (S/S) or an eccentric type (partial S/C) in terms of easily obtaining a crimped yarn. The eccentric core portion may also be exposed on the surface of the fiber, and the area ratio of the core portion to the fiber surface is preferably from 0 to 50%, more preferably from 0 to 30%. The lower the ratio of the core portion forming the surface of the fiber, the higher the ratio of the sheath portion caused by the subsequent one, and higher strength and pile suppression can be obtained. Further, from the viewpoint of fiber strength, the weight ratio of the resin having a higher melting point in the combination of the thermoplastic resin to the fiber is 20 wt% or more and 80 wt% or less, preferably 30 wt% or more and 80 wt%. Hereinafter, it is more preferably 50% by weight or more and 70% by weight or less. The fiber shape may be not only a usual circular fiber but also a special form of fiber such as a shaped fiber. In the case where the composite long fibers are formed of two kinds of thermoplastic resins, the first component is preferably polypropylene, and the second component is polyethylene. When the composite fiber is an eccentric type, it is preferable to use the core as the first component and the sheath as the second component. Polypropylene is strong in strength, is not easily broken during use, and is excellent in dimensional stability when producing sanitary materials, and is therefore preferred. In the case of forming 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 point represented by a metallocene. The polymer synthesized by the active catalyst may also be an ethylene random copolymerized polypropylene. These may be used alone or in combination of two or more. From the viewpoint of texture, strength, and dimensional stability, it is preferred to use homopolypropylene as a main component. Moreover, the lower limit of the MFR (melt mass flow rate) of the polypropylene may be 20 g/10 min or more, preferably more than 30 g/10 min, and more preferably more than 40 g/10 min. The best is over 53 g/10 min. The upper limit may be 85 g/10 min or less, preferably 70 g/10 min or less, and most preferably 60 g/10 min or less. The measurement method of MFR is 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 230 ° C, test load 2.16 kg. The measurement was carried out. When the two types of thermoplastic resins are formed, the polyethylene fibers of the second component have a strong bonding strength after bonding, and the texture of the nonwoven fabric is good, so that it can be preferably used for a sanitary material. Further, the polyethylene may be a polymer synthesized by a usual Ziegler-Natta catalyst or a polymer synthesized by a single-site active catalyst represented by a metallocene. The polyethylene is preferably a high-density polyethylene or 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, the lower limit of the MI (Melt Index) of the polyethylene may be 10 g/10 min or more, preferably more than 15 g/10 min. The upper limit may be 100 g/10 min or less, preferably 60 g/10 min or less, and most preferably 40 g/10 min or less. The measurement method of MI is 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, test load 2.16 kg The measurement was carried out. From the viewpoint of strength or productivity, the nonwoven fabric of the present embodiment is preferably produced by forming a composite long fiber nonwoven web by a spunbonding method. For example, two or more different extruders respectively melt and extrude different thermoplastic resins, and a spinning nozzle having a plurality of spinning holes is sprayed in the form of a wire in a state in which two or more kinds of thermoplastic resins are compounded. Long fiber. Then, a wire which is blown out is cooled by a cold air controlled to 5 ° C to 20 ° C, and is pulled by a traction device at a high speed. The wire extending from the traction device is stacked on the conveyor and transported in the form of a non-woven net. It is also possible to form a multi-layer laminated non-woven net by stacking non-woven nets in the transport. In the case where the nonwoven fabric composed of the thermoplastic composite fiber is joined to form a nonwoven fabric, the joining means is not particularly limited as long as it is heated to a point at which the intersection of the fibers can be melted and the temperature is equal to or higher than the temperature. As a method of heating, various methods of heating such as a hot air circulation type, a hot air penetration type, 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 heating gas can be used. 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 temperature of the hot air 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, when the thermoplastic resin is polyethylene, the polyethylene is melted and then 130 to 155 ° C, preferably 135 to 155 ° C, more preferably 140 to 150 ° C. If the temperature is in this range, the fibers can be followed by the intersection of the fibers, and the strength as a non-woven fabric can be exhibited. Further, the wind speed of the hot air is 0.5 to 3.0 m/s, preferably 0.7 to 2.5 m/s, and more preferably 2.0 m/s or less. When the nonwoven web of the present embodiment is joined by hot air, the air permeability of the nonwoven web has a large influence on the joined state. If the air permeability of the non-woven net is too low, the hot air is not easily penetrated, and it is difficult to obtain a uniform joint as a non-woven fabric. On the other hand, from the viewpoint of maintaining the strength of the obtained non-woven fabric, the air permeability is too high and is not preferable. The air permeability of the finally obtained non-woven fabric which satisfactorily maintains the joint strength is preferably 300 cm 3 /cm 2 /s or more and 700 cm 3 /cm 2 /s or less, more preferably 300 cm 3 /cm 2 . Above /s and below 650 cm 3 /cm 2 /s. In the present specification, the term "hot press-contact portion shape index" refers to a portion of the thermocompression bonded portion which is formed on the surface of the nonwoven fabric by bonding by an embossing roll or hot air treatment, that is, the fusion fusion area ratio and the heat fusion. The bounding area of a certain area is defined by the perimeter. The fusion area ratio refers to the ratio of the area of the fusion portion of the long-fiber non-woven fabric to the total area of the nonwoven fabric. The so-called fusion circumference per fixed area refers to the fusion portion of the long-fiber non-woven fabric per 20 square millimeters. The sum of the perimeters. Here, when the fusion of the fiber intersections is made but the intersection of the fibers is exposed to the surface in contact with the skin, the fiber surface including the fiber intersection is used as a fusion portion and is counted as a filmed portion to the fusion area and the fusion circumference. . As a part where the non-woven fabric is in contact with the skin and gives physical stimulation, the short fiber end of the contact surface of the non-woven fabric or the surface of the fluff is mentioned. Further, in the nonwoven fabric including the long-fiber nonwoven fabric which is thermocompression-bonded by an embossing roll or the like, the short fiber ends are not exposed on the surface of the nonwoven fabric, and physical stimulation by the fiber ends is less likely to occur, but in order to prevent When the surface is raised and the thermocompression bonding area is too large, or when the thermal compression pressure is too large and the unevenness of the peripheral portion of the fusion portion is deep, the texture is not bad, and the peripheral portion of the thermocompression bonding portion causes physical stimulation. That is, when the area ratio of the film formation by fusion is high, the non-woven fabric becomes hard, and the frictional stimulus is large at the time of friction, and the skin is damaged. Further, in the peripheral portion of the heat fusion portion, the heat fusion portion is a concave portion, and the non-heat fusion portion is a convex portion, and the unevenness is large, and the peripheral portion of the fusion portion on the non-woven surface is involved in the skin surface and is damaged. That is, the fusion area ratio and the size of the circumference of the fusion portion are closely related to the damage at the time of friction. If the shape index of the non-woven thermocompression bonding portion is large, the generation of the non-woven fabric tuft is suppressed, and it is possible to prevent a bad finger touch such as itching or tingling caused by the fluff, but due to the hard portion of the filming Skin causes physical irritation. On the other hand, if the shape index of the thermocompression bonding portion which is not woven is small, the physical stimuli caused by the contact between the hard portion of the film and the skin become small, and the non-woven fabric becomes bulky and has a good texture. However, if the shape index of the thermocompression bonding portion is too small, the non-woven fabric cannot obtain sufficient strength in practical use, and fluff is easily generated by friction, and physical touch such as itching and tingling is caused by physical stimulation of the fluff. difference. In view of the above, in the present embodiment, the "hot crimping portion shape index" must be 0.05 or more and less than 1.9. If the shape index of the thermocompression bonding portion is less than 0.05, it is not preferable in terms of preventing the fluff, and if it exceeds 1.9, the fluffy texture is impaired, and the volume feeling and the feeling of expansion at the time of compression are not preferable. The "hot crimping portion shape index" is preferably 1.8 or less, more preferably 1.5 or less. The "hot crimping portion shape index" is more preferably 0.1 or more, and more preferably 0.3 or more. In the case where it is assumed to be used as the top sheet of the sanitary material, the non-woven fabric of the present embodiment must have a maximum skin abrasion depth of the simulated skin model of 0 μm or more and 10 μm or less, and the cumulative scratch depth is 0 μm or more and 80 μm. the following. The maximum scratch depth and the cumulative scratch depth of the simulated skin model refer to the simulated skin model when the non-woven fabric in contact with the skin is rubbed with a simulated skin model having an initial compressive stress of 98 mN/cm 2 according to the following measurement method. The maximum scratch depth of the damage on the surface and the cumulative scratch depth of the damage. The term "damage" as used herein refers to a change in the physical surface shape of a simulated skin model caused by non-woven fabric caused by rubbing a non-woven fabric with a simulated skin model. If the maximum abrasion depth exceeds 10 μm, it is not good for the physical stimulation of the skin, and more preferably 9 μm or less. Further, it is not preferable if the cumulative scratch depth exceeds 80 μm, more preferably 60 μm or less, and still more preferably 50 μm or less. That is, the frictional irritancy of the nonwoven fabric is expressed in the form of the number of damage, the depth of damage, and the width of the damage on the simulated skin model according to the degree of physical stimulation caused by the friction with the simulated skin model. The surface of the simulated skin model was adjusted to be flat and used, and the fine unevenness of the surface before the frictional stimulation was given was not regarded as damage. The simulated skin model of the same composition is comparatively evaluated by the maximum scratch depth and the cumulative scratch depth of the damage, whereby the degree of frictional stimulation of the nonwoven fabric can be compared. If the relationship between the maximum damage depth and the cumulative scratch depth of the damage caused by the friction between the non-woven fabric and the simulated skin model and the physical irritancy caused by the friction between the non-woven fabric and the actual skin is studied by a plurality of functional inspectors, It is confirmed that the non-woven fabric having the largest scratch depth and the accumulated scratch depth is more likely to be strongly irritated when the non-woven fabric actually rubs the skin. If the state of the skin surface after rubbing is observed, the texture disappears greatly. According to the result, the maximum friction depth and the cumulative scratch depth of the damage generated by rubbing the simulated skin model with the non-woven fabric are measured, whereby the frictional irritancy of the non-woven fabric in contact with the skin on the skin can be evaluated. According to the study by the present inventors, if the maximum scratch depth exceeds 10 μm and the cumulative scratch depth exceeds 80 μm, the non-woven fabric in contact with the skin is highly irritating to the skin and easily damages the skin. In the present embodiment, the "surface fluff index" of the nonwoven fabric is preferably 3 or more. If the surface fluff index is less than 3, fluff is generated on the surface of the non-woven fabric due to friction with the skin, etc., resulting in a tactile skin feel and physical stimulation of the skin surface due to friction. In the present embodiment, the longitudinal and horizontal average values of the variation values (MMD) of the friction coefficient of the nonwoven fabric are preferably 0.015 or less. When it exceeds 0.015, it is unsatisfactory in terms of the smoothness of the touch of the skin and the size of the physical stimuli, and more preferably 0.017 or less, more preferably 0.015 or less. The friction with the skin includes friction in both the longitudinal direction and the transverse direction. It is preferred that the friction coefficient in any direction is low, smooth and less resistant. However, in the case where the magnitude of the frictional resistance between the longitudinal direction and the lateral direction is different, the stress of the frictional resistance concentrates on the direction in which the value of the friction coefficient in the longitudinal direction and the lateral direction is small, and as a result, the frictional resistance stress in the longitudinal direction and the lateral direction is averaged. . Therefore, it is important to use the vertical and horizontal average values of the fluctuation values of the friction coefficient as the values indicating the load on the physical stimulation of the skin. The difference in the magnitude of the frictional resistance is obtained. The reason why the frictional resistance stress is averaged is that in the longitudinal and lateral values of the variation value of the friction coefficient, if the coefficient of variation of the friction coefficient in the smaller direction and the coefficient of friction of the larger direction are When the ratio of the variation value exceeds 20 times, the influence of the value in the larger direction becomes higher, and even if the vertical and horizontal average value of the variation value of the friction coefficient is 0.015 or less, the skin feel becomes a rough skin touch. The alignment index obtained by X-ray CT of the non-woven fabric of the present embodiment is preferably 0.43 or less, more preferably 0.425 or less. When the orientation index obtained by the X-ray CT is in this range, the number of fibers occupying the thickness direction of the nonwoven fabric is increased, and the nonwoven fabric is not collapsed and has a bulkiness even under a load, and excellent cushioning properties can be obtained. Not woven. The lower limit is preferably as low as possible, but is preferably 0.30 or more, more preferably 0.33 or more. In order to increase the fiber alignment in the thickness direction of the nonwoven fabric, it is important to control the hot air temperature and the wind speed in the joining step of the nonwoven fabric, and the air permeability of the nonwoven web. If the hot air temperature is high, the degree of melting of the fiber surface becomes very high, and the texture becomes hard. If the hot air wind speed is fast, the hot air penetrates, but the fibers are simultaneously collapsed to become a small-sized non-woven fabric. Further, if the air permeability of the non-woven mesh is too low, hot air cannot penetrate, and if it is too high, hot air cannot apply heat to the fiber intersection, and it is difficult to form a fiber contiguous point that takes both volume and strength. The bulk density of the nonwoven fabric of the present embodiment is preferably in the range of 0.01 g/cm 3 or more and 0.07 g/cm 3 or less, and more preferably 0.03 g/cm 3 or more from the viewpoint of strength, from the viewpoint of texture. Further, it is preferably set to 0.07 g/cm 3 or less. The compression work amount WC of the nonwoven fabric of the present embodiment is preferably 0.20 gf·cm/cm 2 or more and 1.00 gf·cm/cm 2 or less, more preferably 0.25 gf·cm/cm 2 or more and 0.80 gf·cm·cm. 2 or less. From the viewpoint of the cushioning property of the nonwoven fabric for sanitary materials, it is preferable to maintain the compression work amount WC of the range. The average single yarn fineness of the composite long fibers constituting the nonwoven fabric of the present embodiment is preferably 0.5 dtex or more and 10.0 dtex or less, more preferably 0.7 dtex or more and 8.0 dtex or less, and further preferably 0.9 dtex or more and 5.0 dtex or less. From the viewpoint of spinning stability, it is preferably 0.5 dtex or more, and is preferably 10.0 dtex or less from the viewpoint of the texture of the nonwoven fabric of the sanitary material. The composite long fibers preferably have a spiral crimp in terms of maintaining the texture and fluffiness of the nonwoven fabric. The number of crimps of the fibers is preferably 5 / 吋 or more and 45 / 吋 or less, more preferably 10 / 吋 or more and 40 / 吋 or less. If the number of crimps is less than 5/吋, the obtained nonwoven fabric is insufficiently fluffy, and if it exceeds 45 sheets, the appearance of the non-woven fabric obtained is unevenly distributed and the appearance is impaired. The basis weight of the nonwoven fabric of the present embodiment is preferably 8 g/m 2 or more and 80 g/m 2 or less, more preferably 10 g/m 2 or more and 40 g/m 2 or less, and further preferably 10 g/ m 2 or more and 30 g/m 2 or less. When it is 8 g/m 2 or more, the strength is satisfied as a non-woven fabric for a sanitary material, and if it is 80 g/m 2 or less, the softness of the non-woven fabric for sanitary materials which is the object of the present invention is satisfied, and the appearance is not Caused a thick impression. The nonwoven fabric of this embodiment may contain a hydrophilizing agent. As the hydrophilizing agent to be used, it is preferred to use a higher alcohol, a higher fatty acid, an alkylphenol or the like to form an ethylene oxide, either alone or in a mixture, in consideration of safety to a human body, safety in a step, and the like. The nonionic active agent, an anionic active agent such as an alkyl phosphate or an alkyl sulfate. As a method of containing a hydrophilizing agent, a diluted hydrophilizing agent can be usually used, and a conventional method such as a dipping method, a spray method, a coating method (contact coater, gravure coater, die coater) can be used. Preferably, the previously mixed hydrophilizing agent is diluted and coated with a solvent such as water as needed. When the hydrophilizing agent is diluted and coated with a solvent such as water, there is a case where a drying step is required. As the drying method at this time, a known method using convection heat transfer, conduction heat transfer, radiation heat transfer, or the like can be employed, and drying using hot air or infrared rays or a drying method using thermal contact can be used. The amount of the hydrophilizing agent to be applied varies depending on the desired properties, and is usually preferably 0.05% by weight or more and 1.00% by weight or less, more preferably 0.15% by weight or more and 0.8% by weight or less, more preferably 0.1% by weight or less, and further preferably, relative to the fiber. It is 0.2% by weight or more and 0.6% by weight or less. When the amount of adhesion is in this range, the hydrophilic property of the top sheet as a sanitary material is satisfied, and the workability is also improved. When the hydrophilic agent is applied to the nonwoven fabric and the hydrophilic sheet is used as the top sheet of the sanitary material, the urine or blood passes through the surface of the nonwoven fabric, so that it does not remain on the skin, and the chemical stimulation of ammonia and the like is reduced. The irritation is small and it is not easy to damage the skin, so it is not easy to cause inflammation such as dermatitis for chemical stimulation. The nonwoven fabric of the present embodiment is achieved by using a composite long-fiber nonwoven fabric comprising two or more thermoplastic resins and adjusting the fusion portion of the surface in contact with the skin. Since the composite long-fiber non-woven fabric is used, the low-melting-point component of the composite fiber is thermally fusion-bonded when a part of the fiber intersection is not completely filmed, so that when it comes into contact with the skin, the degree of freedom of the fiber is not impaired, and the film is not formed. Part of the stress concentration occurs, so the physical stimulus becomes smaller. Moreover, by the thermal fusion bonding of the fiber intersections, practical strength and anti-fluff are achieved. The degree of freedom of the constituent fibers of the long-fiber non-woven fabric is determined by the degree of thermal fusion bonding between the film-formed portion formed by thermocompression bonding or the like and the low-melting component of the composite fiber, and is expressed by the toughness index of the long-fiber nonwoven fabric. The toughness index is a value obtained by dividing the product of the rupture and the elongation at break of the nonwoven fabric by the basis weight of the nonwoven fabric, and is preferably 40 or more and 250 or less, more preferably 50 or more and 150 or less. [Examples] The present invention will be specifically described by way of Examples, but the present invention is not limited to the Examples. The characteristics of the nonwoven fabric in the examples were measured by the following methods. The evaluation methods of the respective characteristics are as follows, and the obtained physical properties are shown in Table 1 below. Hereinafter, the direction of the production line and the direction in which the fibers travel are referred to as the MD (Machine Direction) direction, and the direction in which the fibers travel is a right angle and the width direction is referred to as a CD (Cross Direction) direction. (1) Average single yarn fineness (dtex) A test piece of 1 cm square was selected as a sample, and the diameter of the fiber was measured at each of 20 points using a microscope VHX-700F manufactured by KEYENCE, and the fineness was calculated from the average value. (2) Weight per unit area (g/m 2 ) According to JIS-L1906, five test pieces of MD 20 cm × CD direction of 5 cm are arbitrarily selected and the mass is measured, and the average value is converted into the weight per unit area. The weight per unit area. (3) Air permeability (cm 3 /cm 2 /s) The measurement was carried out in accordance with the Frazier method described in JIS L-1096. The measurement was performed at 10 points and the average value of the measured values was calculated. (4) The number of crimps is 5 cm in the CD direction, and the test piece of 5 cm square is used as a sample, and the microscope VH-Z450 manufactured by KEYENCE is used to measure each 吋 (2.54 cm) without applying a load to the fibers in the test piece. The number of volumes is reduced, and the number of crimps is calculated based on the average value. (5) Maximum scratch depth and cumulative scratch depth (a) A sample of 3 points 5 cm × 5 cm was produced from any position where the fabric was not woven. (b) The sample was attached to a friction terminal of a friction sensor tester (KES-SE) manufactured by Kato Tech Co., Ltd. (c) Using the above-mentioned friction feeling tester under the conditions of a contact pressure of 4.9 × 10 3 Pa, a contact area of 1 cm 2 and a frictional distance of 2 cm, the sample and the simulated skin model of the initial compressive stress of 98 mN/cm 2 described below were subjected to the following simulation. 1 friction. (d) Using a non-contact laser measuring machine, the center portion of the friction trace generated by the friction on the surface of the simulated skin model and having a width of 1 cm and a rubbing direction of 2 cm, and the maximum width of 1 cm wide with respect to the rubbing direction Scratch depth, cumulative scratch depth. (e) The maximum scratch depth and the cumulative scratch depth of the simulated skin model surface when rubbing 10 places at intervals of 1 cm in the longitudinal direction and the transverse direction of the sample were measured, and the vertical and horizontal average was used as the maximum scratch depth of the test piece, Cumulative scratch depth. The maximum scratch depth and the cumulative scratch depth of the sample were set to the average of the above three points. [Manufacturing method of simulated skin model] One part of agar (Agar POWDER, manufactured by Wako Pure Chemical Industries, Ltd.), and 8 parts of gelatin (manufactured by GIFCO Co., Ltd.) were dissolved in 91 parts of water and then solidified by a refrigerator. . Adjust the surface to be flat. The initial compressive stress is a compressive stress at a displacement of 0.1 mm when the simulated skin model is measured using a hand-held compression tester KES-G5 (manufactured by Kato Tech Co., Ltd.) at a compression area of 200 mm 2 and a compression speed of 0.1 mm/sec. . The amount of water added is finely adjusted as needed to make the initial compressive stress suitable. (6) Shape index of thermocompression joint (a) A sample of 5 cm × 5 cm was selected from any position of the non-woven fabric. (b) 25 sheets of 1 cm × 1 cm samples were prepared from the above samples and the surface was photographed with a microscope to obtain 25 sheets of 25-fold enlarged photographs. (c) Calculating the ratio of the area of the fused portion of the nonwoven fabric to the surface area of the nonwoven fabric based on the obtained photograph. (d) A value obtained by summing the total length of the portion of the film which is formed by fusion of 20 square millimeters per certain area based on the obtained photograph. (e) by the following formula (1): Thermocompression joint shape index = heat fusion area ratio × fusion circumference type per certain area (1) {In the formula, fusion area ratio: fusion portion of long fiber non-woven fabric The ratio of the area to the total area of the long-fiber non-woven fabric; the fusion circumference per certain area: the sum of the circumferences of the fusion portions included in the long-fiber non-woven fabric per 20 square millimeters} The shape index of the thermocompression joint portion was obtained. The hot crimping portion shape index is set to the average of the above 25 points. (7) Variation value of friction coefficient (a) A sample of 6 cm × 8 cm was produced at 3 o'clock from any position of the non-woven fabric. (b) The sample was attached to a measuring stand of a friction sensor tester (KES-SE) manufactured by Kato Tech Co., Ltd. (c) Using a sample and a standard friction terminal of a friction tester (10 mm square wire terminal), measure the coefficient of variation (MMD) of the friction coefficient at a load of 25 g/cm 2 , and measure the cross-section of the sample. average value. (8) Surface fluff index was carried out in accordance with JIS P 8136 in the following manner. (a) Three samples of 25 cm in the longitudinal direction and 3 cm in the lateral direction were produced from any position where the fabric was not woven. (b) The sample was attached to the sample stage of the abrasion resistance tester, and the fine cotton cloth No. 3 (4 cm × 5 cm) was attached to the friction member. (c) A friction member (500 g) was placed on the non-woven fabric, and a friction test of 100 round trips was performed. (d) Functional evaluation of the fluff state of the non-woven surface after rubbing. It is expressed by the average of 3 points according to the following criteria. [Evaluation Criteria: Surface Fleece Index] 5 points: No fluff caused by friction was observed, and damage due to surface friction was not confirmed. 4 points: A slight change in surface shape caused by friction was confirmed, but fluff was not confirmed. 3 points: A number of fluffs caused by friction were observed, but the fiber ends of the peeling were 10 or less. 2 points: The fluff caused by the friction was observed, and it was confirmed that the fiber ends of the peeling were 11 or more and 49 or less. 1 point: A large amount of fluff was generated by friction, and it was confirmed that 50 or more fiber ends were peeled off. (9) Direction 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. (10) Bulk density (g/cm 3 ) The ends of the non-woven fabric crepe sample were removed by 10 cm, and the peacock-type thickness gauge (5 g/4 cm 2 ) was measured at 20 points in such a manner that the width direction was uniform. And calculate the average thickness. The bulk density was calculated from the average value using the following formula. Bulk density (g/cm 3 ) = weight per unit area (g/m 2 ) / thickness (mm) / 1000 (11) Compressed work volume (WC) Select a 5 cm square test piece in the CD direction, and The measurement was carried out using a compression tester (KES-G5) manufactured by Kato Tech. The test piece was placed on a metal sample stage and compressed between steel sheets having a circular plane having a press area of 2 cm 2 . The compression speed was 0.067 mm/s and the maximum compression load was set to 3.4 kPa (35 gf/cm 2 ). The recovery process is also measured at the same speed, and the average value of the compression work is calculated. (12) Texture The softness of the sample was judged by a functional evaluation by five inspectors. The texture of the sample is classified as "harder" or "soft" and is judged on average by 5 people. (13) Toughness index According to JIS L-1906, samples with a MD direction of 20 cm and a CD direction of 5 cm were selected at 5 o'clock, and a longitudinal tensile test was performed using a tensile tester at a clamping interval of 100 mm and a tensile speed of 300 mm/min. In the tensile test, the toughness index was calculated from the measured breaking strength and elongation at break by the following formula. Toughness index = breaking strength (N/50 mm) × elongation at break (%) / basis weight (g/m 2 ) [Examples 1-3, Comparative Examples 1, 2] The MFR was 55 g/10 min ( According to JIS-K7210, the polypropylene (PP) resin measured at a temperature of 230 ° C and a load of 2.16 kg was used as the first component, and the MI was 26 g/10 min (according to JIS-K7210, at a temperature of 190 ° C, a load of 2.16 The high-density polyethylene (HDPE) resin measured in kg is used as the second component, and the discharge amount of the first component is 0.4 g/min by the spunbonding method at a spinning temperature of 220 ° C. Hole, the second component The discharge amount is 0.4 g/min·Hole and the total single hole discharge amount is 0.8 g/min·Hole, and the fiber shape is an eccentric sheath core structure, and the ratio of the first component to the second component is 50/50. A long fiber nonwoven fabric having an average single yarn fineness of 2.8 dtex was prepared by extruding the filament group toward the moving capturing surface at a spinning speed of 3,000 m/min using a high-speed air current pulling device using air jet. Then, hot air having a hot air temperature of 142 ° C and a hot air velocity of 0.7 m/s was passed through the obtained non-woven net, and further subjected to a pressure bonding treatment by a thermocompression bonding roll in which an engraving roll and a smooth roll were combined. The conveying speed at the time of passing the hot air, the temperature of the hot press roll, the pressure, the speed of the conveyor and the winding device were adjusted to obtain Examples 1 to 3 and Comparative Example 1 having a specific shape of the hot crimping portion. 2 composite single-fiber fineness 2.8 Decitex, crimping number 30 / 吋, composite long-fiber non-woven fabric per unit area weight 20 g / m 2 . [Example 4] A composite long-fiber nonwoven fabric obtained in the same manner as in Example 2 was subjected to a discharge temperature of 40 W·min/m 2 (discharge degree: 4.0 W/cm 2 ) at room temperature of 22 ° C. A non-woven fabric having a wetting tension of 39 mN/m was obtained by a corona discharge treatment machine. The obtained non-woven fabric was subjected to a polyether-based hydrophilizing agent by a spray method, and then dried by hot air at 110 ° C for 30 seconds to obtain a long-fiber nonwoven fabric having a coating concentration of 0.3% by weight. The nonwoven fabric obtained has properties sufficient to be used as the top sheet of the diaper. [Example 5] A polypropylene (PP) resin having an MFR of 40 g/10 min (measured according to JIS-K7210 at a temperature of 230 ° C and a load of 2.16 kg) was used as the first component, and the MI was 26 g/10. Min (high-density polyethylene (HDPE) resin measured according to JIS-K7210 at a temperature of 190 ° C and a load of 2.16 kg) as a second component, and the first component is extruded at a spinning temperature of 235 ° C by a spunbonding method. The discharge amount is 0.4 g/min·Hole, the discharge amount of the second component is 0.4 g/min·Hole, and the total single hole discharge amount is 0.8 g/min·Hole, and the fiber shape is the eccentric sheath core structure, The fiber having a ratio of the first component to the second component was 50/50, and the filament group was extruded toward the moving capturing surface at a spinning speed of 2,500 m/min using a cold air extrusion type air current pulling device to prepare an average single yarn fineness of 2.8 dtex. Fiber is not meshed. Then, the hot air having a hot air temperature of 145 ° C and a hot air velocity of 1.0 m / s was thermally joined by the nonwoven fabric obtained by the obtained nonwoven web. The conveying speed and the speed of the winding device when the hot air was passed were adjusted to obtain a composite long fiber nonwoven fabric having a specific heat-bonding portion shape index of 20 g/m 2 . [Example 6] A composite long-fiber nonwoven fabric obtained in the same manner as in Example 5 was subjected to a discharge temperature of 40 W·min/m 2 (discharge degree: 4.0 W/cm 2 ) at room temperature of 25 ° C. A non-woven fabric having a wetting tension of 39 mN/m was obtained by a corona discharge treatment machine. The obtained non-woven fabric was subjected to a polyether-based hydrophilizing agent by a spray method, and then hot air-dried at 120 ° C to obtain a long-fiber non-woven fabric having an agent concentration-adhering amount of 0.35% by weight. The nonwoven fabric obtained has properties sufficient to be used as the top sheet of the diaper. [Comparative Example 3] 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 The filament assembly was extruded in a single component, and the filament group was extruded toward the moving capturing surface at a spinning speed of 3,000 m/min using a high-speed air stream pulling device using air jet to prepare a long fiber nonwoven web having an average single yarn fineness of 2.8 dtex. Then, the obtained non-woven net was passed through a flat roll of 141 ° C and an embossing roll (pattern specification: circular, 0.425 mm in diameter, misaligned arrangement, lateral spacing 2.1 mm, longitudinal spacing 1.1 mm, crimp area ratio 6.3%) The fibers were then bonded to each other to obtain a long-fiber non-woven fabric having a basis weight of 20 g/m 2 and a gas permeability of 456 cm 3 /cm 2 /s and a fiber crimped heat-pressed portion shape index of 1.9. The obtained non-woven fabric has a high bulk density, no cushioning property, and a hard texture. [Comparative Example 4] The short-fiber in which the core component of the first component is a polypropylene having a melting point of 162 ° C and the sheath component of the second component is a high-density polyethylene having a melting point of 130 ° C and a fineness of 2.5 dtex and a cut length of 38 mm is used. The fibers are formed, and the non-woven net is obtained by the carding method. Then, the obtained non-woven nets were joined to each other by hot air bonding at a hot air temperature of 140 ° C and a hot air wind speed of 1.0 m/s to obtain a basis weight of 18 g/m 2 and a gas permeability of 717 cm 3 /cm 2 /s. The composite short fiber non-woven fabric with a crimping number of 5/吋. The obtained non-woven fabric has a low elongation rate, a low toughness index, and a hard texture. [Table 1] [Industrial Applicability] The composite long-fiber nonwoven fabric of the present invention has a cushioning softness fluffiness and a high elongation, and thus can be preferably used for the production of sanitary materials. As a sanitary material, it can be preferably used as a disposable diaper, a menstrual sanitary napkin or an incontinence pad, and can be used as a top sheet of the surface and an outer sheet of the outer side. Moreover, the use is not limited, and for example, it can also be used for a mask, a furnace, a tape bottom cloth, a waterproof sheet base cloth, a patch base cloth, a wound base cloth, a packaging material, a wiping product, a medical robes, a bandage, and a clothing. , skin care tablets, etc.