200304513 玖、發明說明 【發明所屬之技術領域】 本發明係關於表面上具有所需凹凸並具膨鬆構造的立 體片材。 【先前技術】 在曰本專利第3131557號公報中，便有記載著在包含由 熱收縮性纖維、及融點較低於該熱收縮性纖維之熱收縮開 始溫度的樹脂所構成熱熔接纖維的第〗纖維層單面上，層 積著由非熱收縮性纖維所構成第2纖維層的多鈹性不織 布。二纖維層利用線狀熱熔接而在厚度方向呈一體化，熱 熔接部將呈凹部，而該熱熔接部間則呈凸部，俾在第2纖 維層上形成條紋狀的多數皺折。此多皺性不織布係將第i 纖維層與第2纖維層予以重疊，然後依低於上述熱收縮性 纖維之熱收縮開始溫度的溫度，利用熱熔接將二纖維層進 行一體化之後，在吹送上述熱收縮溫度以上的熱風而使上 述熱收縮性纖維產生熱收縮後而獲得。但是，在此不織布 中，因爲第1纖維層與第2纖維層間的熱熔接，乃依存於 第1纖維層中所含30〜50重量％以上的熱熔接纖維，因此 二纖維層間接合力將受限制。所以，在第1纖維層的熱收 縮時、不織布的後加工時、以及使用時，上述熱熔接部將 容易剝落，結果凹凸模樣將不鮮明，且潛在無法獲得所需 凹凸形狀的狀況。此外，因爲上述熱收縮性纖維的收縮溫 度將高於熱熔接纖維的融點，因此在收縮之際，熱熔接纖 維將熔解而導致觸感惡化，形成不適於直接接觸皮膚的片 6 312/發明說明書(補件)/92·03/92100424 200304513 材。 在爲提高二纖維層間之 纖維層中所含熱熔接性纖 之際的溫度或壓力，但是 率，造成第1纖維層的收 凸形狀。此外，後者則熱 柔軟性將降低，且觸感將 再者，當將上述多皺性 的情況時，雖採用將第1 行固定，但是在第1纖維 縮力的熱熔接纖維，此外 縮纖維的收縮溫度以下進 即便欲利用熱壓紋等熱壓 分的接合強度。 在日本專利第3 1 8 1 1 9 5 (face fastener)之母材中戶jf 並部分進行熱熔接之第1 熱收縮，而使另一者突出 織布。此不織布雖採用使 側固定於其他組件上，但 法大量使用供確保收縮力 用熱壓紋等熱壓接而接合 合強度，即便獲得但是因 等觸感將更加惡化。 接合力方面，雖可考慮提高第1 維的比率，或者提高熱熔接加工 前者將降低熱收縮性纖維的比 縮性不足，恐將無法獲得所需凹 熔接部將變硬，結果片材整體的 惡化。 不織布固定於其他材料並供使用 纖維層側的面朝向其他材料等進 層中，便無法大量使用爲確保收 ，因爲熱壓紋等熱壓接係在熱收 行，熱收縮性纖維將無法熔解， 接而進行固定，亦仍無法獲得充 號公報中有記載著，面扣繫物 使用的不織布，乃藉由使經層積 與第2纖維層內的其中一者產生 於單面側，並形成規則凸部的不 經熱收縮過的上述其中依纖維層 是因爲在該另一纖維層中，並無 用的熱熔接纖維，因此即便欲利 其他組件’亦無法獲得充分的接 爲原本便屬不良，因此肌膚接觸 312/發明說明書(補件)/92-03/92100424 7 200304513 【發明內容】 有鑑於斯，本發明之目的在於提供一種觸感佳，對其他 材料等的熱壓接性優越，且在製造時可形成所需凹凸的立 體片材。 再者，本發明之目的在於提供一種可將採用熱收縮性纖 維的立體片材，堅固的接合於由纖維材料所構成被固定物 上的立體片材之固定方法。 本發明乃藉由提供下述立體片材而達成上述目的。該立 體片材係在包含經熱收縮過的熱收縮性纖維之第1纖維層 的單面上，層積著以非收縮性纖維爲主體，且含有熱熔接 性纖維的第2纖維層，而在第1纖維層的另一面上，層積 著含熱熔接性纖維的第3纖維層的立體片材，其特徵爲： 第1〜第3纖維層係在上述立體片材上形成既定圖案的熱熔 接部；上述熱熔接部係從第2纖維層延伸至第3纖維層； 上述第2纖維層係在上述熱熔接部以外的部分處形成凸 狀。（以下，當稱第1發明之時，便稱本發明）。 #發明乃藉由提供下述立體片材之固定方法而達成上 @ S % °該立體片材之固定方法係在包含熱收縮性纖維之 第1纖維層的單面上，層積著以非收縮性纖維爲主體，且 含有熱熔接性纖維的第2纖維層，而將第1纖維層與第2 纖維層形成既定圖案接合部的立體片材，在由纖維材料所 構成的被固定物上’使第2纖維層側朝被固定物側而進行 固定的立體片材之固定方法其特徵爲在上述立體片材與上 述被固定物之間’介設著含熱熔接性纖維的第3纖維層， 8 312/發明說明書(補件)/92-〇3/92100424 200304513 並利用熱壓紋加工而將該等進行一體化（以下，當稱第2 發明之時，便稱本發明）。 【實施方式】 (發明之較佳實施形態） 以下，根據較佳實施形態，參照圖式進行說明。 圖1所示係本發明（第丨發明）一實施形態，立體片材J 〇 的模式剖視圖。立體片材1 0係具有在含熱收縮性纖維的第 1纖維層1單面上，層積著第2纖維層2，並在第1纖維層 1的另一面上，層積著第3纖維層3的3層構造。第1纖 維層1由纖維集合體所構成。另一方面，第2纖維層2與 第3纖維層3係分別由與構成第1纖維層丨之纖維互異的 種類及/或配合的纖維集合體所構成。第2纖維層2與第3 纖維層3係由相同種類及配合的纖維集合體所構成，或者 由不同種類及/或配合的纖維集合體所構成。 當俯看立體片材1 0之情況時，在該立體片材1 〇中形成 如圖2 ( a)所示菱形格子狀圖案的熱熔接部4。熱熔接部4 係將層積狀態的第1〜第3纖維層進行部分熱壓接而形成。 熱熔接部4係從第2纖維層2延伸至第3纖維層3。第 2纖維層與第1纖維層間的接合處、及第1纖維層與第3 纖維層間的接合處，在俯看立體片材1 0之狀態下，分別呈 完全重疊的狀態。熱熔接部4係經由熱熔接樹脂的熔融固 化而形成。如後述’熱熔接樹脂最好依含其之熱熔接纖維 形態，包含於第2纖維層2與第3纖維層3中，該等二纖 維層的熱熔接樹脂係第1纖維層的樹脂並未完全熔解，同 9 312/發明說明書(補件)/92-03/92100424 200304513 時可熔融滲透，並相互黏著而黏著3層。更配合需要最好 亦含於第1纖維層中。熱熔接部4係立體片材i 〇的各個熱 熔接部之總合，最好從第2纖維層延伸至第3纖維層，此 外各個熱熔接部最好沿該部分的立體片材厚度方向全區域 延伸。 再者’本實施形態的各個熱熔接部雖屬於圓形，但是各 個熱熔接部的形狀，亦可爲橢圓形、三角形或矩形、或該 等組合等等。連接接合部的形狀，亦可形成如直線或曲線 等線狀。熱熔接部4的形成圖案可如圖2(b)及圖2(c)所示 的圖案。 對立體片材10面積的熱熔接部4面積率（立體片材10 平均單位面積的熱熔接部4面積），雖隨立體片材10之具 體用途等而異，但是就從突顯出充分提高第1〜第3纖維層 之接合強度的觀點、及隨第2纖維層之變形而充分形成凸 狀立體形狀的膨鬆度等觀點而言，在熱熔接部4形成後且 第1纖維層1熱收縮前，最好3〜5 0 % (尤以5〜3 5 %爲佳）， 在熱收縮後最好爲6〜90%(尤以10〜70%爲佳）。 立體片材1 〇係將層積狀態的第1〜第3纖維層進行部分 熱壓接而呈一體化後，再利用第1纖維層1中所含熱收縮 性纖維之收縮開始溫度以上的溫度施行熱處理而所製得 者，且隨第1纖維層的熱收縮，第2纖維層2的上述熱熔 接部4以外部分將形成凸狀。在本實施形態中，立體片材 10係如圖2(a)所示，具有多數個由菱形格子狀圖案所構成 熱熔接部4所包圍的封閉區域，在此封閉區域中，第2纖 10 312/發明說明書(補件)/92-03/92100424 200304513 維層2將變形爲圓頂狀的凸狀。此外，熱熔接部4在相較 於第2纖維層2形成凸狀部分（亦稱「凸部5」）的情況下， 便相對性呈凹陷狀態。藉此在立體片材1 〇之第2纖維層側 表面上，便形成由多數凸部與凹部所構成的凹凸形狀。在 本實施形態中，藉由第1纖維層1的收縮，在第3纖維層 3側亦將形成同樣的凹凸形狀。 第1纖維層1係包含熱收縮性纖維。此熱收縮性纖維在 立體片材1 〇中，將呈熱收縮的狀態。熱收縮性纖維係可採 用公知者並無特別的限制。若熱收縮性纖維採用潛在捲縮 性纖維的話，因爲將對第1纖維層1賦予彈性體的性質， 而使立體片材1 0整體顯現出彈性體性質，因此屬於較佳狀 況。若立體片材1 0具有彈性體性質的話，當將立體片材 1 〇譬如採用於如後述的使用後拋棄吸收性物品之構成組 件的情況時，對穿著者動作的配合性將較佳，並提昇該吸 收性物品的貼身性，可有效的防止液漏現象發生，因此屬 於較佳狀況。 潛在捲縮性纖維係由譬如以收縮率互異之2種熱可塑性 聚合物材料爲成分的偏芯鞘型複合纖維或並列（side-by-s i d e )型複合纖維所構成。此例記載在日本專利特開平 9-2 96 3 2 5號公報、或專利第27：5 9 3 3 1號說明書中。收縮率 互異的2種熱可塑性聚合物材料之例子，可舉例如：乙烯-丙烯無規共聚物（EP)與聚丙烯（PP)的組合、聚對苯二甲酸 乙二酯（PET)、聚對苯二甲酸乙二酯與聚異苯二甲酸乙二酯 之共聚物（CoPET)的組合等。熱收縮性纖維可爲短纖維短 11 312/發明說明書(補件)/92-03/92100424 200304513 纖（staple fiber) ’亦可爲長纖維纖絲。粗度最好爲i〜7dtex 程度。 熱收縮性纖維的熱收縮開始溫度可設定爲如9 0〜1 1 0 °C。所謂「熱收縮開始溫度」係指將纖維放置於可昇溫的 爐中，並當依一定速度進行昇溫之時，纖維開始產生實質 收縮時的實測溫度。 第1纖維層1可爲由熱收縮性纖維1 〇 〇 %所構成者，或者 亦可包含其他纖維者。第1纖維層〗中所含的其他纖維， 可舉例如：後述熱熔接纖維，如第2及/或第3纖維層中所 含的熱熔接纖維。 即便第1纖維層1中含有其他纖維之情況時，在立體片 材之製造時，就從不阻礙熱收縮性纖維之收縮的觀點而 言’熱收縮性纖維的量係相對於第1纖維層1的重量，最 好在7 〇重量％以上，尤以9 0〜1 0 〇重量％爲佳。 熱收縮前的第1纖維層1之形態，可舉例如：構成纖維處 於未接合狀態的纖維網、或不織布。纖維網形態的第1纖 維層1可舉例如：含熱收縮性纖維且利用梳理法而所形成 的纖維網。不織布形態的第1纖維層1係可舉例如：包含熱 收縮性纖維，並依各種不織布製造法所製得的不織布。不 織布製造法可舉例如：熱熔接法、交錯噴水法、針織法、溶 劑黏著法、紡黏法、及熔噴法等。 第2纖維層2係以非熱收縮性纖維爲主體的構造。在本 說明書中’所謂非熱收縮性纖維包含未顯示熱收縮性的纖 維，及雖顯示熱收縮性，但是在第1纖維層中所含熱收縮 12 3】2/發明說明書(補件)/92-03/92100424 200304513 性纖維的熱收縮開始溫度以下，並未實質發生熱收縮的纖 維。 第2纖維層2中的非熱收縮性纖維量，係相對於第2纖 維層2的重量，至少在7 〇重量％以上，最好在9 〇重量％ 以上，尤以1 0 0重量％者爲佳，就從第〗纖維層形成更立 體的觀點而言，乃屬較佳狀況。 再者’就從進行立體性與收縮性的調整之觀點而言，最 好使第2纖維層中含有與第1纖維層中的熱收縮性纖維相 同之熱收縮性纖維在10〜30重量％程度。 第2纖維層2及第3纖維層3係分別含有熱熔接性纖 維。熱熔接性纖維係含有熱熔接樹脂，並藉由該樹脂的熔 融固化而使纖維間產生熔接者。第2纖維層2及第3纖維 層3中所含熱熔接性纖維，就從更加提昇熱熔接部的接合 強度之觀點而言，最好分別含有熔點低於第1纖維層1中 所含熱收縮性纖維融點的熱熔接樹脂。第i纖維層中的熱 收縮性纖維係當屬於芯鞘型（偏心或同心型）複合纖維、或 並列型複合纖維的情況時，第2及第3纖維層中所含熱熔 接性纖維’最好含有融點低於芯鞘型複合纖維的鞘成分或 並列型複合纖維二者的熱熔接成分之融點的樹脂。 在此’熱收縮性纖維的融點係指依DSC(示差掃描熱量計） 執行熔解熱測量時的峰値。 第2纖維層2及第3纖維層3中所含熱熔接性纖維中的 熱熔接樹脂融點，就從不使接觸肌膚的第〗纖維層產生收 縮’ i可使第2纖維層中所含熱熔接纖維產生熔解並黏著 312/發明說明書(補件)/92-03/92100424 13 200304513 的觀點而言’最好低於第1纖維層之熱收縮性纖維融點i 〇 °C以上（特別係2 0 °C以上）。當熱熔接性纖維屬於多成分系 複數纖維的情況時’最好其中融點最低的熱熔接樹脂低於 第1纖維層的熱收縮性纖維融點。 再者，第2纖維層2及第3纖維層3中所含熱熔接性纖 維中的熱熔接樹脂融點，就從不使第1纖維層產生收縮， 且可使第2纖維層中所含熱熔接纖維產生熔解並進行充分 黏著強度之黏著的觀點而言，最好低於第1纖維層之熱收 縮性纖維融點30°C以上（特別係4CTC以上）。 再者，第2纖維層2中所含熱熔接纖維中的熱熔接樹脂 融點、與第3纖維層3中所含熱熔接纖維中的熱熔接樹脂 融點爲相同’或者該等二個熱熔接樹脂融點的差値在2〇r 以內（特別係1 0 °C以內）的話，可更加提昇第〗〜第3纖維層 的接合強度，此外，就從形成更加優越觸感立體片材的觀 點而言，最好將該等施行一體化的熱處理溫度條件依比較 低的溫度進行。 就從提昇熱熔接部4中的纖維層間之接合強度，以及優 越立體片材觸感的觀點而言，最好第2纖維層中所含熱熔 接纖維的量爲第2纖維層2重量的7 0〜1 0 0重量％，尤以 90〜100重量％爲佳。 第3纖維層3中所含熱熔接纖維的量，就從提昇熱熔接 部4中的纖維層間之接合強度，與優越立體片材觸感，以 及提高與其他材料等（特別係對纖維材料）之熱壓接性的觀 點而言’最好爲第3纖維層3重量的70〜100重量％，尤以 14 3發明說明書(補件)/92-03/92100424 200304513 90〜100重量％爲佳。 第2纖維層2與第3纖維層3中所含熱熔接纖 子，可舉例如··由聚乙烯（PE)、聚丙烯（PP)、聚乙: 聚物、聚對苯二甲酸乙二酯（PET)、聚對苯二甲酸 聚酯、聚對苯二甲酸乙二酯-異苯二甲酸乙二酯吳 醯胺乙烯丙烯酸共聚物、乙烯-丙烯酸甲酯共聚书 甲基丙烯酸乙酯共聚物、乙烯-甲基丙烯酸乙酯奥 嫌-丙嫌酸甲酯-丙嫌酸三元共聚物等所構成的纖 外，可採用由該等熱可塑性聚合物材料組合所構 型複合纖維或並列型複合纖維。該等纖維可爲短 纖，亦可爲長纖維纖絲。粗度最好爲1〜7 dt ex程 1纖維層1中含熱熔接纖維之情況時的熱熔接纖 用如同該等者。 第1纖維層1熱收縮前的第2與第3纖維層2， 可舉例如：構成纖維在未接合狀態的纖維網或不賴 縮前的第2纖維層2與第3纖維層3之形態可爲 可爲不同。 第2纖維層之形態特別係當屬於纖維網形態的 將容易隨收縮而使第2纖維層2面積甚至形狀產 且第2纖維層2將可輕易的朝厚度方向突起凸狀 於較佳狀況。此外，因爲在突起的凸部中充滿著 此可獲得富彈性具柔軟觸感的片材，所以屬於較 當第2纖維層2及/或第3纖維層3屬於纖維網序 該纖維網可利用如梳理法而形成。第2纖維層2 312/發明說明書(補件)/92-03/92100424 維的例 _ -丙烯共 丁二酯等 ^聚物、聚 3、乙烯-+聚物、乙 維。此 成的芯鞘 纖維短 度。當第 維，可採 3之形態， I布。熱收 相同、亦 I舌’因爲 生變化， ，因此屬 纖維，因 佳狀況。 ?情況時， 屬於由此 15 200304513 種纖維網所構成的立體片材1 〇，將形成膨鬆且形成由構成 該纖維網之纖維所充滿的凸部5，而且纖維將沿凸部5配 向著。特別係第2纖維層2若屬於利用梳理法而所形成纖 維網之形態的話，第2纖維層2將形成極疏的構造，本發 明的立體片材1 〇便可穿透及保持黏度較高的液體。此外， 亦可提高立體片材1 0朝厚度方向進行壓縮時的壓縮變形 性。黏度較高的液體，可舉例如：軟便或月經血、人體用淸 潔劑或保濕劑、或者物品用淸潔劑。 此外，第2纖維層的形態若在接合與收縮前屬於不織布 的話，便具有搬送性佳且強度較大的優點。此外，在與第 1纖維層進行接合後，因爲無須使第2纖維層之構成纖維 間進行熔接，因此具有收縮溫度的選擇範圍較廣泛的優點。 本實施形態的立體片材1 〇，譬如可利用下述方法而獲 得，即採用公知方法分別製造第1〜第3纖維層，並在第2 纖維層2與第3纖維層3之間包夾著第1纖維層1，再將 該等進行重疊之後，利用凹凸輥間、或由凹凸輥與平滑輥 所構成熱壓紋輥裝置，對所層積的第1〜第3纖維層部分熱 壓接既定圖案，接著再經第1纖維層1中所含熱收縮性纖 維之熱收縮開始溫度以上的熱處理，經由使該熱收縮性纖 維產生收縮而獲得。熱處理的方法除採用對層積一體化的 第1〜第3纖維層通入熱風並進行吹付的方法之外，尙可採 用如微波、蒸氣、紅外線、熱輥接觸等方法。 依照本實施形態之立體片材1 〇的話，在俯看該立體片 材1 0的狀態中，因爲既定圖案的熱熔接部4，將形成從第 16 312/發明說明書(補件)/92-03/92100424 200304513 2纖維層延伸至第3纖維層之方式，因此便可提昇熱熔接 部4中從第2纖維層至第3纖維層的接合強度。所以，可 充分的維持著第1纖維層的足夠收縮性、及從第2纖維層 延伸至第3纖維層的接合強度，譬如可將製造時的熱壓接 依比較低溫的條件實施。故，可獲得具柔軟且肌膚接觸感 佳之觸感的立體片材。 再者，藉由將第3纖維層朝向欲固定立體片材10之其 他材料等（亦稱「被固定物6」），而進行熱壓接（熱壓紋等）， 便可使該立體片材1 0堅固的熱壓接於該其他材料等之 上，使立體片材1 〇與被固定物間不易產生剝落。 圖3所示係將上述構造的立體片材1 〇，經由熱壓紋加 工，而在由纖維材料所構成被固定物6的衛生棉（吸收性物 品）之吸收體6 1與防漏片材62上，將第3纖維層側固定於 該被固定物側而呈固定的狀態。 即’ 體片材1 0係在衛生棉的中央區域中，經由利用 熱彌封裝置的熱壓紋加工，而熱壓接於吸收體6 1之接觸肌 膚側的表面上，藉由此熱壓接部7 1，在衛生棉的肌膚接觸 面上便形成環狀中央防漏溝。此外，立體片材1 0係在衛生 棉長度方向的二側部，同樣的利用熱彌封裝置的熱壓紋加 工，而熱壓接於吸收體6 1上所配設的防漏片材上，再藉由 此熱壓接部72，而在衛生棉的肌膚接觸面之上述中央防漏 溝二側，形成一對側邊防漏溝。此外，熱壓接部7 1的吸收 體表面係由纖維素等纖維材料所構成的襯紙而所形成。熱 壓接部72的防漏片材62係在纖維素係纖維材料上層合著 17 312/發明說明書(補件)/92-03/92 ] 00424 200304513 聚乙嫌而所構成。爲使防漏片材6 2具更佳的黏著性，因此 便採用使層合（聚乙烯）側朝向表面片材側的方式（在後述 實施例及比較例中亦同）。 在二熱壓接部71，72中，當利用熱彌封裝置進行熱壓紋 加工之時，因爲第3纖維層中的熱熔接樹脂將依被吞食入 被固定物6構成纖維間的狀態而熔融固化，因此立體片材 1 〇與該等被固定物6之間便不易產生剝落現象。 此外，熱彌封裝置在衛生棉、使用後拋棄式尿布等情況 下，可採用習知所採用的溝形成用熱彌封裝置或邊緣彌封 部形成用熱彌封裝置。在圖3中，省略圖示立體片材10 表面上所形成的凹凸等。在圖3所示衛生棉中，將立體片 材1 0當作液透性表面材（表面片材）使用，並在該立體片材 1 〇與液不透過性背面材（背面片材）8之間，介設著液保持 性的吸收體6 1。立體片材1 〇係在吸收體6 1二側部附近， 利用熱熔性黏著劑9 1而固定於防漏片材62與背面材8 上。防漏片材62則利用熱熔性黏著劑92而固定於背面材 8上。 圖4所示係本發明（第2發明）的立體片材之固定方法較 佳實施形態圖。圖4所示立體片材1 0’係在含有熱收縮性 纖維的第1纖維層1單面上，層積著以非熱收縮性纖維爲 主體且含有熱熔接性纖維的第2纖維層2，第1與第2纖 維層1，2係形成既定圖案之熱熔接部（接合部）4的立體片材 1〇’。立體片材10,係除在第1纖維層1的另一面上’並未 層積著第3纖維層之外，其餘均如同上述立體片材1 〇的相 18 312/發明說明書(補件)/92-03/92100424 200304513 同構造。在立體片材1 〇’中，第1纖維層1與第2纖維層2 係利用如同立體片材1 〇相同的圖案進行熱熔接，藉此而形 成上述既定圖案的熱熔接部4。第1纖維層1與第2纖維 層2的較佳構造等，係如同立體片材1 0的第1與第2纖維 層。 在本實施形態的立體片材之固定方法中，當將立體片材 1 〇’，利用熱壓紋加工而固定於由纖維材料所構成被固定物 6的衛生棉（吸收性物品）吸收體6 1上之際，在立體片材1 0 ’ 的第2纖維層2與被固定物6之間介設著在該立體片材1 0’ 之外另行製造的含熱熔接性纖維之第3纖維層，並從該立 體片材1 〇’側施行熱壓紋加工處理。 依照本實施形態之固定方法的話，在利用熱彌封裝置施 行熱壓紋加工的部分，如同上述立體片材1 〇，利用第1纖 維層與第3纖維層中的熱熔接纖維之熱熔接樹脂熔融固 化，而從第2纖維層2至第3纖維層3間極堅固的接合一 體化，同時在熱壓紋·加工時，第3纖維層中的熱熔接樹脂 因爲依被吞食入被固定物構成纖維間的狀態而熔融固化， 因此便可在立體片材與該等被固定物之間獲得足夠的接合 強度。 本發明並不受限於上述實施形態。 本發明之立體片材係可適當的使用於如在單次或數次 使用後便拋棄物品的構成組件。此外，尙可使用於面扣繫 物的母材（環材）或濕布材等方面。特別係適於使用爲衛生 棉或使用後拋棄式尿布等使用後拋棄式物品、淸掃用抹布 19 312/發明說明書(補件)/92-03/92100424 200304513 或人體用擦布等使用後拋棄式擦布的構成組件。當使用爲 使用後拋棄式吸收性物品（譬如：在液透性表面材與液不透 性背面材等二片材之間，具有吸收體的吸收性物品）的構成 組件之情況時，便可將此構成組件（譬如：表面材、背面材、 或側邊立體梳理的任何組件），當作任何組件之其中一部份 使用。 當採用將本發明之立體片材利用熱壓紋加工而固定於 其他材料等（被固定物）上之情況、及立體片材之固定方 法，固定著立體片材的被固定物，可舉例如：使用後拋棄式 擦布的基材片材。其中，特別當由纖維材料所構成被固定 物之情況時，特別係對上述衛生棉或使用後拋棄式尿布等 使用後拋棄式吸收性物品之吸收體等，當利用壓縮而產生 變形的柔軟被固定物之情況時，將可特別明顯的突顯出本 發明的效果。 藉由以下實施例更詳盡說明本發明。惟本發明範圍並不 僅限於該等實施例。 〔實施例〕 (1)第1纖維層之製造 熱收縮性纖維係採用D a i w a b ο ρ ο 1 y t e c h公司製的潛在捲 縮性芯銷型複合纖維（商品名：C P P、芯：聚丙烯（融點 165〜170°C )、鞘：乙烯•丙烯共聚物（融點145〜14rc )、芯/ 銷重量比-5/5、纖度2.2dtex、纖維長51mm、熱收縮開始 溫度9 0 C )。此纖維的原料除將纖維網利用輕梳理而形 成，並通過壓紋輥（壓紋率28%、溫度條件：圖案145t、速 312/發明說明書(補件)/92-03/92100424 20 200304513 度80m/min)，並通過冷卻輥，而形成基重20g/m2的第1 纖維層之熱輥不織布。 (2) 第2纖維層之製造 熱收縮性纖維係採用D a i w a b ο ρ ο 1 y t e c h公司製的芯鞘型 複合纖維（商品名：SHW6、芯：聚對苯二甲酸乙二酯（融點 2 5 0〜2 5 5 °C)、鞘：聚乙烯（融點128〜130°C)、芯/鞘重量比 = 5/5、纖度2.2dtex、纖維長5 lmm)。此纖維的原料除將纖 維網利用輥梳理而形成，並通過透氣熱處理機（速度 13 8m/min、吹風風速lm/sec、處理時間約10秒），而形成 基重12g/m2的第2纖維層之透氣不織布。 (3) 第3纖維層之製造 將如同上述第2纖維層之製造而所獲得的透氣不織布， 當作第3纖維層。 (4) 立體片材之製造 重疊上述第1〜第3纖維層，利用壓紋輥（圖案輥1 4 5 °C、 平面輥135 °C、壓紋圖案2(c)、點徑1.5mm、面積率7.4%) 進行貼合。然後，迅速的利用針板拉鋸機施行熱收縮處理 (上下風風速約4.2m、溫度llOt：〜116°C、處理時間約14 秒），利用機械設定而收縮爲處理前尺寸的長70%、寬 70%。所獲得不織布基重約84g/m2。 〔比較例〕 在實施例的立體片材之製造中，除未採用第3纖維層的 情況下進行貼合後，再收縮之外，其餘均如同實施例般的 獲得立體片材。 21 312/發明說明書(補件)/92-03/92100424 200304513 〔性能評估〕 將所獲得的各個立體片材，使用爲吸收性物品的表面 材，針對圖3所示截面構造衛生棉，利用各片材連續製造 生產100個以上。各立體片材係經由溫度19〇t的熱彌封 (熱壓紋加工），而固定於吸收體61(基重約2 5 0g/m2)之由襯 紙（基重約16g/m2)所構成表面上，同時利用溫度200 °C的 熱彌封（熱壓紋加工），而將撥水性聚乙烯片材固定於由經 層合過的紙（層合基重約7g/m2、紙基重約16g/m2)所構成 防漏片材62上。 相關所製得各衛生棉，對固定於吸收體6 1上的熱壓接 部7 1、及固定於防漏片材62上的熱壓接部72之彌封性， 利用目視觀察圖案部有無浮起現象，並將依據下述評估基 準判斷屬於熱壓接部外觀無問題（外觀良好）的衛生棉個 數，表示於表1中（N=100)。 <評估基準> 外觀良好：如彌封區塊的形狀，明確的接合於基材，完全 無浮起現象。 外觀不良：即便僅部分彌封區塊的形狀稍微不明確或部 分或全部浮起。 表1 熱壓接部7 1 熱壓接部72 實施例 100 98 比較例 0 88 衛生棉1 0 0個中的片材部外觀良好者的個數 22 312/發明說明書(補件)/92-03/92100424 200304513 由表1所示結果可明顯得知，實施例的立體片材（本發明 品）係對吸收體及防漏片材具優越熱壓接性，且對其他材料 等（特別係由纖維材料所構成被固定物）的熱壓接性良好。 相對於此，比較例的立體片材，彌封區塊的形狀存在有 部分稍微不明確、或部分或全部浮起現象，在製造性能上 將產生問題。 (產業上可利用性） 本發明之立體片材係可形成觸感佳、對其他材料的熱壓 接性優越，而且在製造時可形成所需凹凸者。 依照本發明的立體片材之固定方法的話，可將採用熱收 縮性纖維的立體片材，堅固的接合於由纖維材料所構成被 固定物上者。 【圖式簡單說明】 圖1爲本發明（第1發明）的立體片材一實施形態，將立 體片材，與固定其時所採用的被固定物之模式剖視圖。 圖2(a)〜（C)爲分別在立體片材上所形成熱熔接部的形成 圖案例之俯視圖。 圖3爲採用立體片材而所製得衛生棉（吸收性物品）的寬 度方向截面模式剖視圖。 圖4爲本發明（第2發明）的立體片材之固定方法一實施 形態模式剖視圖。 (元件符號說明） 1 第1纖維層 2 第2纖維層 23 312/發明說明書(補件)/92-03/92100424 200304513 3 第3纖維層 4 熱 熔 接 部 5 凸 部 6 被 固 定 物 8 背 面 材 10,10' 體 片 材 61 吸 收 體 62 防 漏 片 材 7 1,72 熱 壓 接 部 91,92 熱 熔 性 黏著劑 312/發明說明書(補件)/92-03/92100424200304513 (1) Description of the invention [Technical field to which the invention belongs] The present invention relates to a solid sheet having desired unevenness on the surface and having a bulky structure. [Prior Art] In Japanese Patent No. 3131557, it is described that a heat-sealed fiber composed of a heat-shrinkable fiber and a resin having a melting point lower than the heat-shrinking start temperature of the heat-shrinkable fiber is described. The first layer of the fiber layer is laminated with a beryllium non-woven fabric of a second fiber layer composed of non-heat-shrinkable fibers. The two fiber layers are integrated in the thickness direction by linear heat welding, and the heat welding portion is a concave portion, and the heat welding portion is a convex portion, and a plurality of stripes are formed on the second fiber layer. This wrinkle non-woven fabric is made by overlapping the i-th fiber layer and the second fiber layer, and then integrating the two fiber layers by thermal fusion at a temperature lower than the thermal shrinkage start temperature of the heat-shrinkable fiber, and then blowing It is obtained after hot-shrinkage of the said heat-shrinkable fiber by the hot air of the said heat-shrinkage temperature or more. However, in this non-woven fabric, since the thermal fusion between the first fiber layer and the second fiber layer depends on the thermal fusion fibers contained in the first fiber layer at 30 to 50% by weight or more, the bonding force between the two fiber layers will be affected. limit. Therefore, when the first fiber layer is thermally contracted, when the non-woven fabric is post-processed, and when it is used, the heat-welded portion is easily peeled off, and as a result, the concave-convex shape is not clear, and the desired concave-convex shape is not obtained. In addition, because the shrinkage temperature of the heat-shrinkable fibers will be higher than the melting point of the heat-sealed fibers, the heat-sealable fibers will melt during shrinkage, resulting in deterioration of the touch, forming a sheet not suitable for direct contact with the skin. 6 312 / Invention Instruction (Supplement) / 92 · 03/92100424 200304513. In order to increase the temperature or pressure at the time of increasing the heat-sealable fibers contained in the fiber layer between the two fiber layers, the convex shape of the first fiber layer is caused. In addition, in the latter case, the thermal flexibility will be reduced, and the touch will be reduced. In the case of the wrinkle, although the first line is fixed, the heat-welded fibers with the first fiber shrinkage force are used. The shrinkage temperature is lower than the bonding strength even if it is intended to use a hot pressing point such as hot embossing. In the Japanese Patent No. 3 1 8 1 1 5 (face fastener), the household material jf is partly subjected to the first heat shrinkage of heat welding, so that the other one protrudes from the woven fabric. Although this non-woven fabric is used to fix the side to other components, it is used in a large amount to ensure the shrinkage force. The bonding strength is obtained by thermal compression bonding such as thermal embossing. Even if it is obtained, the touch will be worsened. In terms of bonding strength, although it may be considered to increase the ratio of the first dimension, or to increase the former, the shrinkage of the heat-shrinkable fiber will be insufficient, and the desired concave welded portion will not be obtained, which will harden the result. deterioration. The non-woven fabric is fixed to other materials and the surface of the fiber layer side faces into the other materials. It cannot be used in large quantities. To ensure the collection, because the thermal compression bonding such as heat embossing is in heat collection, the heat-shrinkable fiber cannot be melted. It was fixed in succession, and it is still not available in the charge statement that the non-woven fabric used for the face buckle is produced by laminating one of the warp and the second fiber layer on the single side, and The above-mentioned intermediate fiber layer that does not undergo heat shrinkage to form a regular convex portion is because in this other fiber layer, there is no use of heat-welded fibers, so even if other components are used, it is not possible to obtain sufficient joints. Poor skin contact 312 / Invention Specification (Supplement) / 92-03 / 92100424 7 200304513 [Summary of the Invention] In view of this, the object of the present invention is to provide a good tactile feel and excellent thermal compression bonding to other materials. , And can form a three-dimensional sheet with desired unevenness during manufacturing. Furthermore, an object of the present invention is to provide a method for fixing a three-dimensional sheet using heat-shrinkable fibers to a three-dimensional sheet firmly bonded to a fixed object composed of a fiber material. The present invention achieves the above object by providing the following three-dimensional sheet. This three-dimensional sheet is formed by laminating a second fiber layer mainly composed of non-shrinkable fibers and containing heat-sealable fibers on one side of the first fiber layer including heat-shrinkable fibers that have been heat-shrinked. On the other side of the first fiber layer, a three-dimensional sheet including a third fiber layer containing heat-fusible fibers is laminated, wherein the first to third fiber layers are formed on the three-dimensional sheet with a predetermined pattern. The thermally welded portion; the thermally welded portion extends from the second fiber layer to the third fiber layer; the second fiber layer is formed in a convex shape at a portion other than the thermally welded portion. (Hereinafter, when the first invention is referred to as the present invention). # Invention is achieved by providing the following method of fixing the three-dimensional sheet @ S% ° The method of fixing the three-dimensional sheet is on one side of the first fiber layer containing heat-shrinkable fibers, and the layers are laminated with non- The shrinkable fiber is a main body and contains a second fiber layer of heat-fusible fibers. A three-dimensional sheet in which the first fiber layer and the second fiber layer form a predetermined pattern joint is placed on a fixed object made of the fiber material. 'A method of fixing a three-dimensional sheet that fixes the second fiber layer side toward the object to be fixed is characterized in that a third fiber containing a heat-sealable fiber is interposed between the three-dimensional sheet and the object to be fixed' Layer, 8 312 / Invention Specification (Supplement) / 92-〇3 / 92100424 200304513, and these are integrated by heat embossing (hereinafter, when the second invention is referred to as the present invention). [Embodiment] (Preferred Embodiment of the Invention) Hereinafter, a preferred embodiment will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a three-dimensional sheet J 0 according to an embodiment of the present invention (the first invention). The three-dimensional sheet 10 has a first fiber layer 1 containing heat-shrinkable fibers on one side, a second fiber layer 2 is laminated, and a third fiber is laminated on the other side of the first fiber layer 1 3-layer structure of layer 3. The first fiber layer 1 is composed of a fiber assembly. On the other hand, the second fiber layer 2 and the third fiber layer 3 are each composed of a fiber assembly of a different type and / or combination from the fibers constituting the first fiber layer. The second fiber layer 2 and the third fiber layer 3 are composed of the same type and combination of fiber assemblies, or are composed of different types and / or combination of fiber assemblies. When the three-dimensional sheet 10 is viewed from the top, the heat-sealed portion 4 having a diamond-shaped grid pattern as shown in FIG. 2 (a) is formed in the three-dimensional sheet 10. The heat-sealed portion 4 is formed by partially thermocompression-bonding the first to third fiber layers in a laminated state. The heat-welded portion 4 extends from the second fiber layer 2 to the third fiber layer 3. The joints between the second fiber layer and the first fiber layer and the joints between the first fiber layer and the third fiber layer are completely overlapped with each other when the three-dimensional sheet 10 is viewed from the top. The heat-sealed portion 4 is formed by melt-solidification of a heat-sealed resin. As described later, it is desirable that the heat-sealing resin is included in the second fiber layer 2 and the third fiber layer 3 according to the shape of the heat-sealed fiber. Completely melted, melt-penetrate at 9 312 / Invention Specification (Supplement) / 92-03 / 92100424 200304513, and adhere to each other with 3 layers. It is preferable that it is contained in the first fiber layer even if it is more compatible. The heat-sealed portion 4 is a total of the heat-sealed portions of the three-dimensional sheet i 0. It is preferable that the heat-sealed portion extends from the second fiber layer to the third fiber layer. In addition, each heat-sealed portion preferably extends along the thickness direction of the three-dimensional sheet of the portion. Area extension. Furthermore, although each of the heat-sealed portions in this embodiment is circular, the shape of each heat-sealed portion may be elliptical, triangular, or rectangular, or a combination thereof. The shape of the connection joint may be linear, such as a straight line or a curved line. The formation pattern of the heat-sealed portion 4 may be a pattern shown in Figs. 2 (b) and 2 (c). Although the area ratio of the heat-sealed portion 4 of the area of the three-dimensional sheet 10 (the average area of the heat-sealed portion 4 of the average unit area of the three-dimensional sheet 10) varies with the specific use of the three-dimensional sheet 10, it is obvious that the From the viewpoints of the bonding strength of the first to third fiber layers and the bulkiness of the convex three-dimensional shape due to the deformation of the second fiber layer, after the heat-sealed portion 4 is formed and the first fiber layer 1 is heated, Before shrinking, it is preferably 3 to 50% (especially 5 to 35%), and after heat shrinking, it is preferably 6 to 90% (especially 10 to 70%). The three-dimensional sheet 10 is a layer in which the first to third fiber layers in a laminated state are partially thermocompression-bonded and integrated, and then the temperature above the shrinkage start temperature of the heat-shrinkable fibers contained in the first fiber layer 1 is used. A product obtained by performing a heat treatment, and in accordance with the thermal contraction of the first fiber layer, a portion other than the heat-welded portion 4 of the second fiber layer 2 will be convex. In this embodiment, as shown in FIG. 2 (a), the three-dimensional sheet 10 has a plurality of closed areas surrounded by the heat-sealed portion 4 formed by a rhombic grid pattern. In this closed area, the second fiber 10 312 / Invention (Supplement) / 92-03 / 92100424 200304513 The two-dimensional layer 2 will be deformed into a dome-shaped convex shape. In addition, when the heat-sealed portion 4 is formed in a convex portion (also referred to as a "convex portion 5") compared to the second fiber layer 2, the relative fusion is in a recessed state. As a result, a concave-convex shape composed of a plurality of convex portions and concave portions is formed on the side surface of the second fiber layer of the three-dimensional sheet 10. In this embodiment, the same uneven shape is formed on the third fiber layer 3 side due to the shrinkage of the first fiber layer 1. The first fiber layer 1 contains heat-shrinkable fibers. This heat-shrinkable fiber is in a state of being heat-shrinkable in the three-dimensional sheet 10. The heat-shrinkable fiber system may be any known one, and there is no particular limitation. The use of latently shrinkable fibers as the heat-shrinkable fibers is preferable because the properties of the elastomer will be imparted to the first fiber layer 1 and the elastomeric properties of the three-dimensional sheet 10 will be exhibited as a whole. If the three-dimensional sheet 10 has elastomer properties, for example, when the three-dimensional sheet 10 is used in a case where the components of the absorbent article are discarded after use, as described later, the action of the wearer will be better, and Increasing the fit of the absorbent article can effectively prevent the occurrence of liquid leakage, so it belongs to a better situation. Potentially crimpable fibers are composed of, for example, eccentric sheath-type composite fibers or side-by-side d-type composite fibers composed of two thermoplastic polymer materials having different shrinkage rates. This example is described in Japanese Patent Laid-Open Publication No. 9-2 96 3 2 5 or Patent No. 27: 5 9 3 31. Examples of two types of thermoplastic polymer materials with different shrinkage rates include, for example, a combination of ethylene-propylene random copolymer (EP) and polypropylene (PP), polyethylene terephthalate (PET), Combination of polyethylene terephthalate and polyethylene isophthalate copolymer (CoPET). The heat-shrinkable fiber may be short fiber short 11 312 / Invention Specification (Supplement) / 92-03 / 92100424 200304513 Staple fiber ′ may also be a long fiber filament. The thickness is preferably about i ~ 7dtex. The thermal shrinkage start temperature of the heat-shrinkable fiber can be set to, for example, 90 ° to 110 ° C. The "heat shrinkage initiation temperature" refers to the actual temperature at which the fibers begin to shrink substantially when they are placed in a furnace that can be heated and the temperature is increased at a certain rate. The first fiber layer 1 may be composed of 100% of heat-shrinkable fibers, or may include other fibers. The other fibers contained in the first fiber layer include, for example, heat-sealable fibers described later, such as heat-sealable fibers contained in the second and / or third fiber layers. Even when the first fiber layer 1 contains other fibers, the amount of the heat-shrinkable fiber is relative to the first fiber layer from the viewpoint of not hindering the shrinkage of the heat-shrinkable fiber during the production of the three-dimensional sheet. The weight of 1 is preferably 70% by weight or more, and more preferably 90 to 100% by weight. The form of the first fiber layer 1 before heat shrinking may be, for example, a fibrous web constituting the fibers in an unbonded state, or a non-woven fabric. The first fiber layer 1 in the form of a fiber web may be, for example, a fiber web containing heat-shrinkable fibers and formed by a carding method. Examples of the first fibrous layer 1 in the form of a non-woven fabric include non-woven fabrics made of various types of non-woven fabrics including heat-shrinkable fibers. Non-woven fabric manufacturing methods include, for example, a heat-welding method, a staggered water-jet method, a knitting method, a solvent adhesion method, a spun-bonding method, and a melt-blown method. The second fiber layer 2 has a structure mainly composed of non-heat-shrinkable fibers. In this specification, "the non-heat-shrinkable fiber" includes fibers that do not show heat-shrinkability, and although they show heat-shrinkability, the heat shrinkage contained in the first fiber layer 12 3] 2 / Invention Specification (Supplement) / 92-03 / 92100424 200304513 Fibers that have not undergone substantial heat shrinkage since the heat shrinkage starting temperature of sexual fibers. The amount of non-heat-shrinkable fibers in the second fiber layer 2 is at least 70% by weight or more, preferably 90% by weight or more, and particularly 100% by weight relative to the weight of the second fiber layer 2 Preferably, it is a better condition from the viewpoint that the fibrous layer is formed more three-dimensionally. Furthermore, from the viewpoint of adjusting the three-dimensionality and shrinkability, it is preferable that the second fiber layer contains the heat-shrinkable fiber having the same heat-shrinkable fiber as that in the first fiber layer at 10 to 30% by weight. degree. The second fiber layer 2 and the third fiber layer 3 each contain a heat-sealable fiber. The heat-sealable fiber contains a heat-sealable resin, and the resin is fused and solidified to cause fusion between the fibers. From the viewpoint of further improving the bonding strength of the heat-sealed portion, the heat-fusible fibers contained in the second fiber layer 2 and the third fiber layer 3 preferably each contain a melting point lower than the heat contained in the first fiber layer 1. Heat-sealable resin with shrinking fiber melting point. When the heat-shrinkable fiber in the i-th fiber layer is a core-sheath (eccentric or concentric) type composite fiber or a side-by-side type composite fiber, the heat-sealable fibers contained in the second and third fiber layers are the most A resin containing a melting point lower than that of the sheath component of the core-sheath composite fiber or the thermal fusion component of the side-by-side composite fiber is preferred. Here, the melting point of the heat-shrinkable fiber is a peak value when a heat of fusion measurement is performed by a DSC (differential scanning calorimeter). The melting point of the heat-sealable resin in the heat-sealable fibers contained in the second fiber layer 2 and the third fiber layer 3 never shrinks the first fiber layer that comes into contact with the skin. From the viewpoint of 312 / Invention Specification (Supplement) / 92-03 / 92100424 13 200304513, the heat-sealable fibers are melted and adhered. 'It is preferably lower than the melting point i of the heat-shrinkable fibers of the first fiber layer by 0 ° C or more (especially (Above 20 ° C). In the case where the heat-sealable fiber is a multi-component system, it is preferable that the heat-sealable resin having the lowest melting point is lower than the heat-shrinkable fiber of the first fiber layer. Furthermore, the melting point of the heat-sealable resin in the heat-sealable fibers contained in the second fiber layer 2 and the third fiber layer 3 will never cause the first fiber layer to shrink, and the second fiber layer can be included in the second fiber layer. From the viewpoint of heat-sealable fibers melting and adhering with sufficient adhesive strength, the heat-shrinkable fibers of the first fiber layer are preferably 30 ° C or higher (especially 4CTC or higher). Furthermore, the melting point of the thermal fusion resin in the thermal fusion fiber contained in the second fiber layer 2 is the same as that of the thermal fusion resin in the thermal fusion fiber contained in the third fiber layer 3, or the two thermal fusion points. If the difference between the melting points of the fusion resin is within 20r (especially within 10 ° C), the bonding strength of the third to third fiber layers can be further improved. In addition, the formation of a three-dimensional sheet with superior touch texture can be achieved. From the viewpoint, it is preferable to perform such integrated heat treatment at a relatively low temperature. From the standpoint of improving the bonding strength between the fiber layers in the heat-sealed portion 4 and the superior three-dimensional sheet feel, it is preferable that the amount of the heat-sealed fibers contained in the second fiber layer is 7 times the weight of the second fiber layer 2 0 to 100% by weight, preferably 90 to 100% by weight. The amount of the heat-sealed fibers contained in the third fiber layer 3 increases the bonding strength between the fiber layers in the heat-sealed portion 4, improves the touch with a superior three-dimensional sheet, and improves other materials (especially for fiber materials). From the viewpoint of thermocompression bonding, it is preferable to be 70 to 100% by weight of the weight of the third fiber layer 3, especially 14 3 Invention Specification (Supplement) / 92-03 / 92100424 200304513 90 to 100% by weight. . Examples of the heat-sealed fibers contained in the second fiber layer 2 and the third fiber layer 3 include polyethylene (PE), polypropylene (PP), polyethylene: polyethylene, and polyethylene terephthalate. Ester (PET), polyethylene terephthalate, polyethylene terephthalate-ethylene isophthalate, uramine, acrylic copolymer, ethylene-methyl acrylate copolymer, and ethyl methacrylate copolymer Fibers, ethylene-ethyl methacrylate ortho-propanoic acid methyl-propanoic acid terpolymers, etc., can use composite fibers or side-by-side configuration of these thermoplastic polymer material combinations Type composite fiber. These fibers can be short fibers or long fiber filaments. The thickness is preferably 1 to 7 dt ex stroke. In the case where the heat-sealed fiber is contained in the fiber layer 1, the heat-sealed fiber is used as such. The second and third fiber layers 2 before the first fiber layer 1 are heat-shrinked may be, for example, the form of the fiber web in which the fibers are not bonded or the second fiber layer 2 and the third fiber layer 3 before being shrunk. To be different. The form of the second fiber layer is particularly a fiber web. The area and even the shape of the second fiber layer 2 can easily be produced with shrinkage, and the second fiber layer 2 can easily protrude in the thickness direction in a better condition. In addition, since the convex portions of the protrusions are filled with a sheet material having a high elasticity and a soft touch, the second fiber layer 2 and / or the third fiber layer 3 belong to the fiber network sequence. The fiber network can be used. Formed by carding. Second fiber layer 2 312 / Invention specification (Supplement) / 92-03 / 92100424 Dimensional example _-propylene co-butadiene, etc. ^ polymer, poly 3, ethylene-+ polymer, ethyl dimensional. The resulting sheath fiber is short. When the third dimension, can take the form of 3, I cloth. The heat recovery is the same, and because the tongue ’s changes, it is a fiber, and it is in a good condition. In the case, the three-dimensional sheet 10, which is composed of 15 200304513 fiber webs, will form a bulk and form the convex portion 5 filled with the fibers constituting the fiber web, and the fibers will be aligned along the convex portion 5 toward . In particular, if the second fiber layer 2 is in the form of a fiber web formed by a carding method, the second fiber layer 2 will form an extremely sparse structure, and the three-dimensional sheet 10 of the present invention can penetrate and maintain high viscosity. Liquid. In addition, the compression deformability when the three-dimensional sheet 10 is compressed in the thickness direction can also be improved. Examples of liquids with higher viscosity include soft stools or menstrual blood, detergents or moisturizers for humans, or detergents for articles. In addition, if the shape of the second fiber layer is a non-woven fabric before joining and shrinking, it has the advantages of good transportability and high strength. In addition, after joining with the first fiber layer, there is no need to weld the constituent fibers of the second fiber layer, so there is an advantage that the selection range of the shrinking temperature is wide. The three-dimensional sheet 10 according to this embodiment can be obtained by, for example, a method in which first to third fiber layers are separately manufactured by a known method, and sandwiched between the second fiber layer 2 and the third fiber layer 3. After the first fiber layer 1 is overlapped, the layers are overlapped, and then the embossed rollers or the heat embossing roller device composed of the uneven rollers and smooth rollers are used to heat-press the laminated first to third fiber layers. It is obtained by following a predetermined pattern, and then subjecting the heat-shrinkable fiber to shrinkage by subjecting it to a heat treatment at a temperature higher than the heat-shrink start temperature of the heat-shrinkable fiber contained in the first fiber layer 1. In addition to the method of applying heat to the laminated first and third fiber layers and blowing them, the methods of heat treatment may include methods such as microwave, steam, infrared, and heat roller contact. According to the three-dimensional sheet 10 according to this embodiment, when the three-dimensional sheet 10 is viewed from the bottom, the heat-sealed portion 4 of a predetermined pattern will form the 16th 312 / Invention Specification (Supplement) / 92- 03/92100424 200304513 Since the 2 fiber layer is extended to the third fiber layer, the bonding strength from the second fiber layer to the third fiber layer in the heat-sealed portion 4 can be improved. Therefore, sufficient shrinkage of the first fiber layer and bonding strength extending from the second fiber layer to the third fiber layer can be sufficiently maintained. For example, thermal compression bonding at the time of manufacture can be performed under relatively low temperature conditions. Therefore, it is possible to obtain a three-dimensional sheet which is soft and has a good touch on the skin. Furthermore, the three-dimensional sheet can be made by thermocompression bonding (heat embossing, etc.) by orienting the third fiber layer toward other materials (also referred to as "fixed object 6") to which the three-dimensional sheet 10 is to be fixed. The material 10 is firmly thermocompression-bonded to the other materials and the like, so that the three-dimensional sheet 10 and the object to be fixed do not easily peel off. As shown in FIG. 3, the three-dimensional sheet 10 having the above-mentioned structure is subjected to heat embossing, and the absorbent body 61 and the leak-proof sheet of a sanitary napkin (absorbent article) composed of a fibrous material are fixed. At 62, the third fiber layer side is fixed to the object to be fixed and is fixed. That is, the body sheet 10 is in the central area of the sanitary napkin, and is heat-embossed on the skin-contacting surface of the absorbent body 61 through heat embossing using a heat-sealing device. The contact portion 71 is formed with a ring-shaped central leak-proof groove on the skin contact surface of the sanitary napkin. In addition, the three-dimensional sheet 10 is on both sides of the sanitary napkin in the lengthwise direction, and is similarly heat-embossed by a heat-sealing device, and is heat-pressed on the leak-proof sheet provided on the absorbent body 61. Then, a pair of side leak-proof grooves are formed on the two sides of the above-mentioned central leak-proof groove on the skin contact surface of the sanitary napkin by the thermal pressure-contacting portion 72. The surface of the absorber of the thermocompression bonding section 71 is formed by a stabilizer made of a fibrous material such as cellulose. The leak-proof sheet 62 of the thermocompression bonding portion 72 is formed by laminating a cellulose-based fiber material 17 312 / Invention Specification (Supplement) / 92-03 / 92] 00424 200304513 Polyethylene. In order to improve the adhesion of the leak-proof sheet 62, a method in which the laminated (polyethylene) side faces the surface sheet side is adopted (the same applies to the examples and comparative examples described later). In the two thermal compression bonding sections 71 and 72, when the thermal embossing is performed by using a thermal sealing device, the thermal fusion resin in the third fiber layer will be swallowed into the fixed object 6 to form a state between the fibers. Since it melts and solidifies, it is difficult for the three-dimensional sheet 10 to peel off from the fixed objects 6. In addition, the heat-sealing device may be a conventional heat-sealing device for groove formation or an edge-sealing part for sanitary napkins, disposable diapers, and the like. In FIG. 3, irregularities and the like formed on the surface of the three-dimensional sheet 10 are omitted. In the sanitary napkin shown in FIG. 3, the three-dimensional sheet 10 is used as a liquid-permeable surface material (surface sheet), and the three-dimensional sheet 10 and the liquid-impermeable back surface material (back sheet) 8 are used. A liquid-retaining absorber 61 is interposed therebetween. The three-dimensional sheet 10 is fixed to the leakage-preventing sheet 62 and the back surface 8 using a hot-melt adhesive 91 in the vicinity of the two sides of the absorbent body 61. The leakage preventing sheet 62 is fixed to the backing material 8 by using a hot-melt adhesive 92. Fig. 4 is a view showing a preferred embodiment of a method for fixing a three-dimensional sheet of the present invention (second invention). The three-dimensional sheet 10 'shown in FIG. 4 is on one side of the first fiber layer 1 containing heat-shrinkable fibers, and a second fiber layer 2 containing non-heat-shrinkable fibers as a main body and containing heat-fusible fibers is laminated. The first and second fiber layers 1 and 2 are three-dimensional sheets 10 ′ that form a heat-welded portion (joint portion) 4 in a predetermined pattern. The three-dimensional sheet 10 is similar to the above-mentioned three-dimensional sheet 10, phase 18 312 / Instruction Manual (Supplement), except that the third fiber layer is not laminated on the other side of the first fiber layer 1. / 92-03 / 92100424 200304513 The same structure. In the three-dimensional sheet 10 ', the first fiber layer 1 and the second fiber layer 2 are thermally fused by using the same pattern as the three-dimensional sheet 10, thereby forming the thermally fused portion 4 having the predetermined pattern. Preferred structures of the first fiber layer 1 and the second fiber layer 2 are similar to the first and second fiber layers of the three-dimensional sheet 10. In the method for fixing the three-dimensional sheet of this embodiment, the three-dimensional sheet 10 'is fixed to a sanitary napkin (absorbent article) absorbent body 6 which is fixed to a fixed object 6 made of a fibrous material by heat embossing. In the case of 1 above, between the second fiber layer 2 of the three-dimensional sheet 1 0 ′ and the fixed object 6, a third fiber containing a heat-sealable fiber, which is separately manufactured, is interposed between the three-dimensional sheet 10 0 ′. Layer, and heat-embossed from the 10 'side of the three-dimensional sheet. According to the fixing method of this embodiment, in the portion where the heat embossing is performed by the heat-sealing device, the three-dimensional sheet 10 is used, and the heat-sealing resin of the heat-sealed fibers in the first fiber layer and the third fiber layer is used. It melts and solidifies, and the extremely strong joints are integrated from the second fiber layer 2 to the third fiber layer 3. At the same time, during heat embossing and processing, the heat fusion resin in the third fiber layer is swallowed into the fixed object. Since the state between the fibers is melted and solidified, sufficient bonding strength can be obtained between the three-dimensional sheet and the object to be fixed. The invention is not limited to the embodiments described above. The three-dimensional sheet material of the present invention can be suitably used as a component of a disposable article after a single or several uses. In addition, 尙 can be used for the base material (ring material) or wet cloth material of the face buckle. Particularly suitable for use as sanitary napkins or disposable diapers, disposable wipes, wipes for cleaning 19 312 / Invention Manual (Supplement) / 92-03 / 92100424 200304513 or disposable wipes for human use Components of a wiper. When using a component that is a disposable absorbent article after use (for example, an absorbent article with an absorber between two sheets such as a liquid-permeable surface material and a liquid-impervious back material), it may be used. Use this constituent component (such as: surface material, back material, or any component with side combing) as part of any component. When the three-dimensional sheet of the present invention is fixed to other materials (fixed objects) by heat embossing, and the method of fixing the three-dimensional sheet is used to fix the fixed object of the three-dimensional sheet, for example, : Base sheet of disposable wipes after use. Among them, especially in the case of a fixed object composed of a fibrous material, particularly the absorbent body of the disposable absorbent article such as the above-mentioned sanitary napkin or disposable diaper, etc., the soft quilt deformed by compression In the case of a fixture, the effect of the present invention can be particularly prominently displayed. The invention is illustrated in more detail by the following examples. However, the scope of the present invention is not limited to these examples. [Examples] (1) Production of the first fiber layer The heat-shrinkable fiber was made of a daiwab ο ρ ο 1 ytech company potential shrinkable core pin type composite fiber (trade name: CPP, core: polypropylene (melt Point 165 ~ 170 ° C), sheath: ethylene • propylene copolymer (melting point 145 ~ 14rc), core / pin weight ratio -5/5, fineness 2.2dtex, fiber length 51mm, heat shrink start temperature 90 ° C). The raw material of this fiber is formed by lightly combing the fiber web, and passed through an embossing roller (embossing rate 28%, temperature conditions: pattern 145t, speed 312 / invention specification (supplement) / 92-03 / 92100424 20 200304513 degrees 80 m / min) and passed through a cooling roll to form a heat roll nonwoven fabric with a first fiber layer having a basis weight of 20 g / m2. (2) Production of the second fiber layer The heat-shrinkable fiber is a core-sheath composite fiber (trade name: SHW6, core: polyethylene terephthalate (melting point 2) manufactured by Daiwab ο ρ ο 1 ytech. 5 0 ~ 2 5 5 ° C), sheath: polyethylene (melting point 128 ~ 130 ° C), core / sheath weight ratio = 5/5, fineness 2.2dtex, fiber length 5 lmm). The raw material of this fiber is formed by combing the fiber web with a roller and passing through a heat treatment machine (speed 13 8m / min, air blow speed lm / sec, and processing time about 10 seconds) to form a second fiber with a basis weight of 12g / m2. Layer of breathable non-woven fabric. (3) Production of the third fiber layer The breathable nonwoven fabric obtained as described above for the production of the second fiber layer was used as the third fiber layer. (4) The three-dimensional sheet is made by overlapping the first to third fiber layers, and an embossing roller (pattern roller 1 45 ° C, flat roller 135 ° C, embossing pattern 2 (c), dot diameter 1.5 mm, 7.4%). Then, quickly perform heat-shrinking treatment with a pin plate pull saw (up and down wind speed about 4.2m, temperature llOt: ~ 116 ° C, processing time about 14 seconds), using mechanical settings to shrink to 70% of the size before processing, 70% wide. The basis weight of the obtained non-woven fabric was about 84 g / m2. [Comparative Example] In the production of the three-dimensional sheet of the example, a three-dimensional sheet was obtained in the same manner as in the example, except that the three-layer sheet was laminated without using a third fiber layer and then contracted. 21 312 / Invention Manual (Supplement) / 92-03 / 92100424 200304513 [Performance Evaluation] Each obtained three-dimensional sheet is used as a surface material of an absorbent article, and a sanitary napkin with a cross-section structure shown in FIG. 3 is used. Continuous production of more than 100 sheets. Each three-dimensional sheet is heat-sealed (heat-embossed) at a temperature of 19 ° and is fixed to an absorbent body 61 (basis weight of about 250 g / m2) by a backing paper (basis weight of about 16 g / m2). On the surface, heat-sealing (heat embossing) at a temperature of 200 ° C is used to fix the water-repellent polyethylene sheet to the laminated paper (laminated basis weight is about 7g / m2, paper basis) It weighs about 16 g / m2) on the leak-proof sheet 62. The sealability of each of the prepared sanitary napkins with respect to the thermocompression bonding portion 71 fixed to the absorbent body 61 and the thermocompression bonding portion 72 fixed to the leak-proof sheet 62 was observed visually with or without the pattern portion. Floating phenomenon, and the number of sanitary napkins which are judged to have no problem with the appearance of the thermo-compression-bonded part (good appearance) according to the following evaluation criteria are shown in Table 1 (N = 100). < Evaluation criteria > Appearance is good: if the shape of the sealed block is clearly bonded to the substrate, there is no floating phenomenon at all. Poor appearance: Even if the shape of the partially sealed block is slightly ambiguous or partially or fully floated. Table 1 Thermocompression bonding section 7 1 Thermocompression bonding section 72 Example 100 98 Comparative example 0 88 The number of those with good appearance of the sheet section out of 100 sanitary napkins 22 312 / Invention Specification (Supplement) / 92- 03/92100424 200304513 From the results shown in Table 1, it can be clearly seen that the three-dimensional sheet (product of the present invention) of the example has excellent thermocompression bonding properties to the absorber and the leak-proof sheet, and to other materials, etc. The to-be-fixed object made of fiber material has good thermocompression bonding properties. On the other hand, in the three-dimensional sheet of the comparative example, the shape of the sealed block is partially unclear or partially or completely floated, which causes problems in manufacturing performance. (Industrial Applicability) The three-dimensional sheet of the present invention can be formed with a good tactile sensation, excellent thermocompression bonding to other materials, and a desired unevenness during production. According to the method for fixing a three-dimensional sheet of the present invention, a three-dimensional sheet using heat-shrinkable fibers can be firmly bonded to a fixed object made of a fibrous material. [Brief description of the drawings] FIG. 1 is a schematic cross-sectional view of an embodiment of a three-dimensional sheet material according to the present invention (the first invention), using a solid sheet material and an object to be fixed when fixing the sheet material. Figs. 2 (a) to (C) are plan views of examples of forming a heat-sealed portion formed on a three-dimensional sheet. Fig. 3 is a schematic cross-sectional view in the width direction of a sanitary napkin (absorbent article) produced using a three-dimensional sheet. Fig. 4 is a schematic sectional view of an embodiment of a method for fixing a three-dimensional sheet of the present invention (second invention). (Description of element symbols) 1 1st fiber layer 2 2nd fiber layer 23 312 / Instruction of the Invention (Supplement) / 92-03 / 92100424 200304513 3 3rd fiber layer 4 Heat-welded portion 5 Convex portion 6 Fixture 8 Back material 10,10 'Body sheet 61 Absorber 62 Leak-proof sheet 7 1,72 Thermal compression part 91,92 Hot-melt adhesive 312 / Invention manual (Supplement) / 92-03 / 92100424