M262163 八、新型說明： 【新型所屬之技術領域】 本創作係有關吸收性物品創作，觀察者易於判斷其在排 尿耵後之視覺變化，具有確實告知更換時間之功能。 【先前技術】 截至目前，在由於排尿等而變濕之情形下，具有告知更 換功能之拋棄式尿布之方案，已經有多種。例如，尿布具 有内含pH指示劑之吸收性芯，當尿液到達與穿用者抵接面 相反一側的面時，會發生顏色改變。另有一些尿布含有一 旦被水潤濕即變色之試劑。 但疋，每個技術都有從外部較難明確識別變色程度之問 題。其原因在於：變色試劑爲親水性，感知到尿液時，試 劑浴解在尿液中，因產生滲透而使顏色變得模糊不清。而 且，爲了感知尿液，適宜將變色試劑設置在盡量靠近吸收 性芯的位置，所以該試劑一旦被吸收性芯吸收、擴散，從 外部識別顏色就更加困難。另外，因爲尿布一般都配有各 種圖案，爲了不影響尿布整體外觀，變色部分大多儘量做 得較小，在此情形下，一旦出現如前所述之現象，從外部 識別顏色變化就更加困難。 【新型内容】 本創作提供吸收性物品，其包含吸收體、以及位於與該 吸收體穿用者肌膚抵接面相反側之阻液性裏面片體，且分 別包含股下部以及從股下部向前後延伸的腹側部和背側 部。 93231.doc M262163 〜則述及收性物品，在前述吸收體和前述裏面片體間之把 疋：位1含有—旦接觸水分即發生視覺變化之親水性試劑: '述晨面片體上’裝飾有即使接觸水分也不發生視 化之匕紋。 又 在刖述吸收性物品之前述股下部，前述裏面片體上僅在 ，收性物品厚度方向上與含前述親水性試劑之部位不相重 疊之部分有前述花紋。 前述親水性試劑視覺變化前之顏色和變化後之顏色中之 任一顏色’舆前述花紋顏色類似。 【實施方式】 本創作係關於吸收性物品，其可從外面很容易識別以因 排尿而產生變色爲主的視覺變化。 下面根據其較佳之實施方式，參照圖式對本創作進行說 明。圖1表7F的是’作爲本創作一個實施方式的拋棄式尿布 的，從裏面片體一側觀看，部分剖析的平面圖。圖2係圖工 中IMI線之橫斷面圖。在圖2中表襯2 一側位於上部。尿布工 含透液性表襯2、阻液性裏面片體3及在表襯裏面片體2、3 之間之吸收體4，貫質上，沿縱長方向形成。吸收體4含吸 收性芯41及被覆在吸收性芯41周圍的，由親水性薄層紙等 薄紙組成之襯板紙42。襯板紙42含被覆吸收性芯41之表襯2 一側的第一襯板紙42a，以及被覆吸收性芯41之裏面片體3 側’並且上捲到表襯2 —側邊緣的第2襯板紙42b。使用襯 板紙42之目的，係維持吸收性芯41的保形性。 在義面片體3之外側（吸收體之相反側）一面，設置有不織 93231.doc M262163 布外罩7。夕卜罩7形成尿…之外緣。尿布】含股下㈣以及由 股下部B向前後延伸之腹側部c和背側部A。背側部a，使用 尿布時位於穿用者的後背中央，腹側部c，使用尿布時位於 使用者之腹部。在背側部A之左右兩側邊緣處，言史置有連接 帶8，8 ;在腹側部C之外罩7上設置有定位帶9 ;使用尿布時， 連接τ 8格接在定位帶9上。 吸收體4由表襯2及裏面片體3夾持、固定。從吸收體々前 後邊緣向前後方向延伸出腰部5，5，並從左右緣橫向延伸 出腿部6，6。使用尿布時爲了使各個部位都與使用者相密 &在5和6上分別设置腰部彈性材料5〗以及腿部彈性材料 61。在尿布丨表襯一面上長軸方向的左右兩侧，分別形成立 體防護層11。在立體防護層_自由端，設置有立體防護 層彈性材料111，形成收攏結構。 作爲構成尿布1的以上各部分之材料，可以不受特別限制 地使用該技術領域以往衆所周知的材料。例如，作爲表襯2 可以使用親水性的不織布及帶孔薄膜等。作爲裏面片體3 可以使用阻液性薄膜等。作爲吸收性芯4 i可以使用起毛紙 漿和高吸水性聚合體顆粒的疊織體。作爲彈性伸縮材料 6 1，7 1可以使用各種彈性材料。 而且本貫k方式之拋棄式尿布1，如圖丨和圖2所示，在抛 棄式裏面片體3和弟一襯板紙42b之間，含有一旦接觸水分 即產生視覺變化之親水性之試劑（以下稱變化劑）1〇。在本實 施方式中，爲了使變化劑1〇與位於裏面片體3一側的第二襯 板紙42b之表面相接觸，將該變化劑1〇設置在與裏面片體3 93231.doc M262163 相鄰之處。更具體地，在按後述方法得到的黏著成分中混 合pH指示劑（例如漠酚藍）等，得到由熱熔體組合物構成之 變化劑10，並將其塗在裏面片體3之吸收體相對面，在該吸 收體相對面上放有由襯板紙42a，42b被覆吸收性芯4ι所形 成之吸收體4。本創作中所謂「視覺變化」係包含如下三種 情況之概念：接觸水分前後發生顏色變化、接觸水分顏色 消失、以及接觸水分顯現顏色。本實施方式之變化劑1〇， 屬於接觸水分前後發生顏色變化之情況。 在本實施方式中，變化劑10設置在尿布寬度方向的中央 部分，經過尿布背侧部A、股下部B以及腹側部〇：，呈直線 形。更具體地，設置成在尿布寬度方向上並列的3條細長的 線。憑藉這種結構，使得在股下部B的變化劑丨〇之視覺變 化，通過與較難發生顏色變化的背側部B和腹側部c相比 較’能夠明確識別。而且將變化劑丨〇做成細條帶狀形態， 若干條（本實施方式爲3條）在尿布寬度方向上並列，所以視 覺變化更易識別。 本創作之拋棄式尿布有如下三大特點：（i)裏面片體3上裝 飾有即使接觸水分也不會發生視覺變化之花紋12，（π)裏面 片體3在尿布1股下部B處，僅在與含變化劑1〇的部位，在尿 布1之厚度方向上不發生重疊的部分才有花紋12，（iii)變化 劑10與發生視覺變化前之顏色和變化後之顏色中之任一顏 色類似，以及與花紋12之顏色類似。本實施方式之拋棄式 尿布，在尿布寬度方向上、3條變化劑10線之外側，裝飾有 2行沿尿布縱向延伸的兔形花紋12。花紋12裝飾在裏面片體 93231.doc M262163 3的與外罩7相對面上。各行花紋中，青綠色花紋兔和粉免 色兔相間排列。另外，變化劑1〇之各線在變化前呈黃色， 變化後呈青綠色。具體地講，所用變化劑1〇含有溴酚藍。 以本貫施方式之拋棄式尿布爲例，說明其提高視覺變化 可識別性之機制。排尿前，花紋12爲青綠色，變化劑10線 爲黃色。因此’觀察者（尿布穿用者爲嬰幼兒時，爲母親等） 形成兩者為不同顏色之認識。Μ，排尿後尿液一旦到達 變化劑丨0,變化劑10即變成青綠色。因此，觀察者第一次 由於花紋12與變化劑1()線之顏色變成類似而感到不協調。 接著第二次注意到花紋12之顏色與變化劑1〇線顏色變爲相 同，就知道更換尿布1的時間到了。這時最重要的是，在股 下部Β處變化劑10線與花紋12，在尿布寬度方向上間隔開。 即是說，在尿布1之股下部Β處，裏面片體3上之花紋以僅存 在於，與含有變化劑10的部位，在尿布丨之厚度方向上不相 重疊之處。如果變化劑10線與花紋12兩者重疊，變化劑⑺ 線的顏色變化就不易看到，觀察者錯過尿布丨更換時機之可 能性增高。 變化劑10線與花紋12之間距，如果太近，變化劑1〇的顏 色變化不易看到；如果離得過遠’對變化劑1〇的顏色變化 的不協調感就變得遲鈍。因此’二者間距爲5〜3〇職為好， 7〜25 mm最好。 本實施方式之拋棄式尿布1，在尿布長軸方向之整個區 域’變化劑10線與花紋12在尿布寬度方向上都有間隔，作 在股下部B以外的部分，即使二者重疊也不會有不利二響二 93231.doc -10- M262163 原因在於，具有接受最多排尿可能之部位是股下部B，所以 僅在股下部B處，變化劑線1〇與花紋12間隔開，觀察者就可 以充分識別顏色變化。雖説如此，當穿用者在睡眠時，尿 液有可能從預想不到的方向流出，因此，在背側部A以及腹 側部C，也將變化劑1〇線與花紋12，在寬度方向上間隔開來 為好。 關於變化劑10線顏色與花紋12顏色的類似性，只要具有 通¥ /主思力之觀察者看後，能認爲是類似的程度即可。爲 了進一步提高識別度，可以使用根據奥斯特瓦爾德（〇stwald) 色相環進行分類的24色色卡，以相同色卡、或者色相號在 相差1的範圍内為好。 下面將對本創作使用的變化劑10進行說明。變化劑為親 水性組合物，其含有通過接觸水分而產生視覺變化的物質 (以下稱變色物質）。作爲變色物質可以舉出PH指示劑等。 例如可以使用衆所周知的墨水或者指示劑。作爲pH指示 當吸收性物品’如本實施方式，為撤棄式尿布時，適 宜使用同尿液接觸前後出現顏色變化的。例如，漠盼藍、 甲基橙、茜素S、漠、甲酚綠、甲基红、漠甲酚紫、刀天青 ("esazurin)等變色範圍為pH 3〜7者為好。 在與水分接觸之前，變化劑10需要穩定地固定在裏面片 體3以及/或第二襯板紙42b之表面。實現這種固定的簡單有 效之方法爲：作爲變色物質和黏著性物質混合而成的親水 性組合物，將變化劑10塗在裏面片體3或者第二襯板紙42b 之表面。作爲黏著性物質’基㈣變色物質相溶性之考量， 93231.doc M262163 以有親水性的為好。作爲此類物質例如有聚合物，在與水 分接觸前，可作爲第二襯板紙42b和裏面片體3的黏著劑發 揮作用之親水性聚合物。作爲親水性聚合物例如可以使 用：聚乙二醇（PEG)，聚丙二醇（PPG)，聚乙烯醇（pvA"聚 醯胺，乙烯吡咯烷酮均聚物等任意一種。這些親水性聚合 物的平均分子量在1000〜50000之間，尤其在2〇〇〇〜2〇〇〇〇之 間為好，因為可以提供確實的固定作用。 铯紋12即使接觸水分也不會發生視覺變化。具體地講， 即使接觸水分，顏色也不變化，或顏色不消失。印製此種 花紋適且使用不溶於水的墨水。作爲此種墨水，例如可以 舉出··硝酸纖維素類墨水，聚醯胺類墨水，丙烯酸類墨水， 染料型墨水等。 花紋12可以設置在裏面片體3的第二襯板紙42b相向面， 或者外罩7相向面。本實施方式中，花紋12設置在外罩7相 向面，所以通過外罩7也可以清楚見到花紋12。 如本實施方式，在變化劑10的視覺變化是依靠顏色變化 的情況下，變化劑10視覺變化前，從尿布外裏面片體3侧測 定之明度L* ,以15〜80之間為好，最好在2〇〜7〇之間；視覺 灸化後明度L*在20〜80之間，最好在3〇〜8〇之間。另外，從 尿布外裏面片體3側測定的花紋12明度L*，以在3〇〜9〇之間 為好，在35〜90之間較好，在4〇〜9〇之間最佳，這樣透過裏 面片體3或外罩7可以看到鮮明的花紋12。 當變化劑10視覺變化前顏色和花紋12之顏色不是類似色 時，在變化劑10視覺變化前明度L*，比花紋12的明度L*小 93231.doc -12- M262163 1〜15為好。相反，當變化劑1〇視覺變化後顏色和花紋12之 顏色不是類似色時，變化劑10發生視覺變化後之明度L*， 比花紋12之明度L*小1〜15為佳。而且，不論何種情況，變 化劑10視覺變化後明度L*與變化前明度L*之差，最好爲 -10〜5。因此，排尿前變化劑丨〇線雖然能被觀察者所識別， 但是與花紋12比相對地不很顯眼，所以有利於提高尿布i 之圖案設計水準。另一方面，在排尿後變化劑1〇線變成花 紋12之類似色的情形下，觀察者一看就像花紋12面積擴大 了一般，所以造成不協調感，相反，在變成與花紋丨2不同 顏色的情形下，給觀察者造成如同線浮出來的印象。因此， 有利於觀察者確實了解更換尿布的時機。 爲進一步提高本實施方式尿布丨的視覺變化上的識別 性，襯板紙42a和42b以親水性爲佳。另外每張襯板紙的基 重以5〜30 g/m2爲宜。而且，爲了使變化劑1〇牢固黏貼於第2 襯板紙42b上，同時變化劑10不向吸收性芯41滲透，並使尿 每張襯板紙的基重爲5〜30 。在本實施方式中，因第1 液以適當速度到達裏面片體3， g/m2，尤其以10〜20 g/m2爲最佳 襯板紙仏和第2襯板紙—由同種薄層紙組成，所以兩概板 紙42a和42b為相同基重，並有相同厚度。 爲了從尿布外部清晰識別變化劑_視覺變化，襯板紙 42a和42b以透明度較低且白色度較高爲宜。透明度以观 以下爲佳。白色度之L*a*b*表色系紡 巴糸統（CIE1976)之色座標指 數b*值，為3〜負值，而以卜巧、尤 、 兀具以〇〜·5更宜。具有這 樣透明度及白色度之襯板紙42，例 1J如可以通過使用經漂白 93231.doc -13· M262163 處理的紙漿、或在襯板紙中加填充料等而得到。另外，作 爲吸收性芯41也以白色度高爲佳。 L*值、b*值用色差計測定。本創作中，採用日本電色工 業（股）的可攜帶型分光色差計NF777(商品名），在照明條件 C、視野角度2 、正面文光=〇/45 、光束直徑φ1〇 mm之測 定條件下，並在測定樣品裏側重疊數張襯板紙使其厚度在5 mm以上’在此狀態下測定反射光求得。 變化劑10通過裏面片體3從尿布外部被識別。因此作爲裏 面片體3爲了提高其視覺識別性，採用透明度較高的爲佳: 但透明度如果過高，會有從尿布外部看透排泄物之情況。 從此觀點出發，裏面片體3的透光率以3〇_8〇%，特別是 35〜80%爲宜。 裏面片體3之透光率測定如下。 〈透光率之測定方法〉 九砑1肷，裂造的、商品名「HR-100」，測 定光源使用Α光源，敎全透光率Tt的值。敎裏面片體上 的2意10個點，將其平均值作爲透光率值。 =片體3除了具有前述透光率，而且具有阻液性以及透 濕性爲佳。裏面助之透濕度，依細z_ 保存1小時後的試樣的值爲這樣對 於通過尿布㈣度㈣度㈣，㈣ 及對於防止體液滲漏，都適宜。 $耆4，以 作爲這種具有阻液性 及透濕性、可用於裏面片體3Μ原 材料，例如有多孔性薄膜ϋ # 卸月體3的原 、j如，將疏水性熱可塑性樹脂， 93231.doc -14- M262163 *由：馱鈣等材料組成的精細無機填充料、或者與該樹脂 、有機回分子等進行溶解混勻，形成薄膜，並對該 薄膜谁并时丄 穸、 早σ或雙向拉延，可得到多孔性薄膜。作爲熱可 塱=樹=，可以舉出的例子是聚烯烴。作爲聚烯烴，可以 =牛出同〜低密度聚乙烯、線性低密度聚乙烯、聚丙稀以及 κ 丁稀等’這些材料可單獨、或混合使用。 孔面：體3之原料，如果使用基重為10〜4°g/m2的多 / 、，在變化劑ι〇的視覺變化易於從尿布外部進行識 別的同k ’也可以得到比較柔軟之觸感，所以很適合。 爲了便於識別變化劑㈣覺變化，外罩7具有__定的透光 :為f °外罩7的透光率在鄉以上為好，而在55%以上、 特別是在60%以上尤其好。 爲了能_尿布外部看透變化劑1G， =重/厚度之残布，以便得到前述透光率。該不織布^ 5 45 g/m ’尤其為10〜40 g/m2時’變化劑10視覺變化 的識別性、以及織物風格和手感等感官性能，二者得以兼顧。 如可以舉出’由聚乙埽和 :r #、：烴、聚對苯二f酸乙二酯等聚酯組成熱塑性 I吏用其中一種樹腊做成纖維，或使用其中2種以上樹 月曰做成具有芯猶型、和並列型| 不織布。 …以結構的複合纖維，並織成 並：=所❹的不織布材料，適宜使用底色透明度高 識別料，因爲可提高變化劑10視覺變化的 識別性。其中外罩7’在尿布厚度方向上，與含變化㈣ 93231.doc -15· M262163 的區域有重疊部分，該重疊區域的大部分以白色爲佳，而 在非重疊部分，在不妨礙變化劑1 0視覺變化的識別性的範 圍内，也可以實施印刷。 作爲被覆吸收性芯41之襯板紙，可以使用如圖3所示之材 料，取代如圖1、圖2所示之材料。在圖3中，吸收性芯4 j 由一張襯板紙42被覆，襯板紙42左右兩側部分42c、42d， 在吸收性心41上裏面片體3之相向面，以一定的寬度相互重 疊，成爲兩層。而且在成爲兩層的襯板紙42上，設置有變 化劑10。通過採用此種結構，可以提高告知尿布1更換時機 的視覺變化的識別性。 對於圖3所示之實施方式的提高視覺變化識別性之機 制，進行如下（1)〜(3)的推測。 (1) 尿液到達變化劑10存在地點，變化劑1 〇發生顏色變 化。於此同時，變化劑1 〇在尿液中溶解或分散，並轉移到 與裏面片體3相接的第1襯板紙42a内。變化劑10也要從第i 襯板紙42a向存在於吸收性芯41 一側之第2襯板紙42b進行 若干量的轉移，但因下述（2)及（3)的原因，大部分變化劑10 仍保留在第1襯板紙42a上，而幾乎不向第2襯板紙42b轉移。 (2) 第2襯板紙42d在尿液轉移到裏面片體3的階段，已經處 於濕潤狀態。因此，成爲難以吸收更多液體的狀態。這也 被認爲是變化劑1 〇幾乎不向第2襯板紙42d轉移的一個原 因。 (3) 由於第2襯板紙42d的存在，可以阻礙與變化劑1〇相接 的第1襯板紙42c，同吸收性芯41的接觸。因此，可防止變 93231.doc -16- M262163 化劑10通過吸收性芯41向平面方向擴散、以及變化劑1〇的 顏色變淺。 圖3中，相互重疊的第1襯板紙42c和第2襯板紙42d，在與 含有變化劑10的區域在尿布1之厚度方向上，相重疊的部 分、至少其中一部分，最好使用疏水性黏著劑如（熱熔體黏 著劑）使其互相接著。因此，可以防止尿液在第i襯板紙42a 上向尿布的寬度方向擴散，由此可抑制由於變化劑1〇的擴 散帶來顏色之滲透。 本創作之吸收性物品，不受前述實施方式之限制，在不 脫離本創作主旨之範圍内可做種種變更。例如，作爲被覆 吸收性芯4丨之材料，可以不使用前述的由薄層紙等組成的 襯板紙，而代以親水性的不織布。另外，在前述實施方式 中，在背側部A的左右兩側邊緣設置有固定帶8，8，也可以 改用在背側部A的左右兩側邊緣，在側面延伸出一對腰帶。 而且在一個腰帶的端部，設置一個固定帶子部分，通^此 固定部分，可賴左右腰㈣定在穿用者的腹部或者背部。 另外，前述實施方式係有關展開型拋棄式尿布的，本創 作也同樣能適用於其他吸收性物品，如短褲型拋棄式尿 布、生理用衛生棉、生理用短褲等。 如上之詳述，本創作之吸收性物品， .M T於σ知排尿更換 時機的視覺變化’從尿布外部即可非常容易地 【圖式簡單說明】 仃識別。 圖1係作爲本創作一個實施方式的撤畢 u系式尿布從寞面片 體一側觀看的、部分剖析的平面圖。 93231.doc •17- M262163 圖2爲圖1中II-II線之斷面圖。 圖3爲表示吸收體其他結構之斷面圖（相當於圖2)。 【元件符號說明】 1 拋棄式尿布（吸收性物品） 2 表襯 3 裏面片體 4 吸收體 5 腰部 6 腿部 7 外罩 8 連接帶 9 定位帶 10 變化劑 11 立體防護層 12 花紋 41 吸收性芯 42 襯板紙 42a, 42c 第1概板紙 42b， 42d 第2襯板紙 51 腰部彈性材料 61 腿部彈性材料 111 立體防護層彈性材料 A 背側部 B 股下部 C 腹側部 93231.doc -18-M262163 VIII. Description of the new type: [Technical field to which the new type belongs] This creation is related to the creation of absorbent articles. Observers can easily judge the visual changes after urination and have the function of telling the replacement time. [Prior art] Up to now, there have been various schemes of disposable diapers having a function of notifying replacement when the urine becomes wet due to urination or the like. For example, a diaper has an absorbent core containing a pH indicator, and when urine reaches the side opposite to the wearer's abutment surface, the color changes. Other diapers contain agents that change color once wetted with water. However, each technology has a problem that it is difficult to clearly identify the degree of discoloration from the outside. The reason is that the color changing reagent is hydrophilic. When urine is sensed, the reagent is dissolved in the urine, and the color becomes blurred due to the penetration. Moreover, in order to sense urine, it is suitable to place the color changing reagent as close to the absorbent core as possible, so once the reagent is absorbed and diffused by the absorbent core, it is more difficult to identify the color from the outside. In addition, because diapers are generally equipped with various patterns, in order not to affect the overall appearance of the diaper, the discolored parts are mostly made as small as possible. In this case, once the phenomenon described above occurs, it is more difficult to identify the color change from the outside. [New content] This creation provides an absorbent article, which includes an absorbent body and a liquid-resistant inner sheet on the opposite side of the skin abutting surface of the wearer of the absorbent body, and includes the lower part of the thigh and forward and backward from the lower part of the thigh. Extended ventral and dorsal portions. 93231.doc M262163 ~ refers to consumable articles, the handle between the aforementioned absorbent body and the aforementioned inner sheet: bit 1 contains-a hydrophilic agent that undergoes a visual change upon contact with moisture: 'mentioned morning on the sheet' Decorated with a dagger pattern that does not visualize even when exposed to moisture. Furthermore, in the aforementioned lower part of the absorbent article, the inner sheet body only has the aforementioned pattern on the inner sheet body, and the portion of the absorbent article that does not overlap with the portion containing the hydrophilic reagent in the thickness direction has the aforementioned pattern. Any one of the color before the visual change and the color after the change of the hydrophilic agent is similar to the color of the pattern. [Embodiment] The present invention relates to an absorbent article, which can easily recognize visual changes mainly caused by discoloration due to urination from the outside. The following describes the creation according to the preferred embodiment with reference to the drawings. Fig. 1 Table 7F is a plan view of a part of the disposable diaper as an embodiment of the present invention, viewed from the side of the inner sheet body. Figure 2 is a cross-sectional view of the IMI line in the drawing. The side of the table lining 2 is located on the upper side in FIG. 2. The diaper contains a liquid-permeable surface liner 2, a liquid-resistant inner sheet body 3, and an absorbent body 4 between the surface inner sheet bodies 2, 3, and is formed in the longitudinal direction. The absorbent body 4 includes an absorbent core 41 and a liner paper 42 composed of thin paper such as a hydrophilic thin-layer paper and covering the absorbent core 41. The liner paper 42 includes a first liner paper 42a covering one side of the surface liner 2 of the absorbent core 41, and a second liner paper covering the inner sheet body 3 side of the absorbent core 41 and rolled up to the surface liner 2-the side edge 42b. The purpose of using the liner paper 42 is to maintain the shape retention of the absorbent core 41. A non-woven 93231.doc M262163 cloth cover 7 is provided on the outer side of the pasta sheet body 3 (the opposite side of the absorbent body). The Xibu cover 7 forms a urine ... outer edge. Diaper] Contains the femoral chin and the ventral portion c and dorsal portion A which extend forward and backward from the lower femoral portion B. The back side a is located at the center of the wearer's back when using a diaper, and the ventral side c is located at the user's abdomen when using a diaper. At the left and right edges of the back side A, there are connecting belts 8 and 8; positioning belt 9 is provided on the outer cover 7 of the ventral portion C; when using a diaper, a connection τ 8 grid is connected to the positioning belt 9 on. The absorbent body 4 is clamped and fixed by the surface lining 2 and the back sheet body 3. The waist portions 5, 5 extend forward and backward from the front and rear edges of the absorbent body, and the legs 6, 6 extend laterally from the left and right edges. When using a diaper, in order to make each part close to the user & 5 and 6, respectively, a waist elastic material 5 and a leg elastic material 61 are provided. On the left and right sides of the diaper and surface lining in the long axis direction, a solid protective layer 11 is formed respectively. At the free end of the three-dimensional protective layer, a three-dimensional protective layer elastic material 111 is provided to form a closed structure. As the material constituting the above-mentioned respective parts of the diaper 1, a material conventionally known in this technical field can be used without particular limitation. For example, as the backing 2, a hydrophilic nonwoven fabric, a perforated film, or the like can be used. As the back sheet 3, a liquid-resistant film or the like can be used. As the absorptive core 4 i, a laminate of raised pulp and superabsorbent polymer particles can be used. As the elastically stretchable material 61, 71, various elastic materials can be used. Moreover, the disposable diaper 1 of the conventional k method, as shown in Figure 丨 and Figure 2, between the disposable inner sheet 3 and the first liner paper 42b, contains a hydrophilic agent that produces a visual change upon contact with water ( Hereafter referred to as a modifier) 10. In this embodiment, in order to bring the changing agent 10 into contact with the surface of the second liner paper 42b on the inner sheet 3 side, the changing agent 10 is disposed adjacent to the inner sheet 3 93231.doc M262163 Place. More specifically, a pH indicator (e.g., phenol blue) is mixed with the adhesive component obtained by the method described below to obtain a change agent 10 composed of a hot-melt composition, and this is applied to the absorbent body of the inner sheet body 3. On the opposite side, the absorbent body 4 formed by covering the absorbent core 4m with the liner papers 42a and 42b is placed on the opposite surface of the absorbent body. The so-called "visual change" in this creation includes the following three situations: the color changes before and after exposure to moisture, the color disappears when exposed to moisture, and the color appears when exposed to moisture. The change agent 10 of this embodiment is a case where the color changes before and after exposure to moisture. In this embodiment, the changing agent 10 is provided in the central portion in the width direction of the diaper, passes through the back side portion A, the lower thigh portion B, and the ventral side portion 0: of the diaper, and is linear. More specifically, three elongated lines are provided in parallel in the diaper width direction. With this structure, the visual change of the change agent in the lower femoral portion B can be clearly identified by comparing it with the dorsal portion B and the ventral portion c which are less likely to undergo a color change. In addition, the change agent is made into a thin strip shape, and a plurality of them (three in this embodiment) are juxtaposed in the width direction of the diaper, so the visual change is easier to recognize. The disposable diaper of this creation has the following three characteristics: (i) the inner sheet 3 is decorated with a pattern 12 that does not change visually even if it is exposed to moisture, (π) the inner sheet 3 is at the lower part B of the diaper 1 The pattern 12 is formed only on the portion containing the change agent 10 and does not overlap in the thickness direction of the diaper 1. (iii) Any of the color before the change agent 10 and the color after the change The color is similar and similar to that of the pattern 12. In the disposable diaper of the present embodiment, two rows of rabbit-shaped patterns 12 extending in the longitudinal direction of the diaper are decorated on the outer side of the three changing agent 10 lines in the diaper width direction. The pattern 12 is decorated on the surface of the inner sheet body 93231.doc M262163 3 opposite to the cover 7. In each row of patterns, the turquoise pattern rabbit and the pink rabbit are arranged alternately. In addition, each line of the change agent 10 was yellow before the change, and was green-blue after the change. Specifically, the modifier 10 used contained bromophenol blue. Take the disposable diaper of this method as an example to explain the mechanism of improving the visibility of visual changes. Before urination, the pattern 12 is cyan, and the change agent 10 line is yellow. Therefore, the observer (when the diaper wearer is an infant, a mother, etc.) recognizes that the two colors are different. M, once the urine reaches the changing agent 0 after urination, the changing agent 10 becomes blue-green. Therefore, for the first time, the observer felt uncoordinated because the colors of the pattern 12 and the change agent 1 () line became similar. Then noticed for the second time that the color of the pattern 12 and the color of the changing agent 10 line are the same, and it is known that the time for changing the diaper 1 is up. At this time, the most important thing is that the change agent 10 line and the pattern 12 are spaced apart in the width direction of the diaper at the lower part B. That is to say, at the lower part B of the diaper 1, the pattern on the inner sheet 3 exists only in a place where it does not overlap with the portion containing the change agent 10 in the thickness direction of the diaper. If the lines of the changing agent 10 and the pattern 12 overlap, the color change of the changing agent ⑺ line is not easy to see, and the probability that the observer misses the diaper 丨 will increase. If the distance between the line of the change agent 10 and the pattern 12 is too close, the color change of the change agent 10 is not easy to see; if it is too far away, the sense of incompatibility with the color change of the change agent 10 becomes dull. Therefore, the distance between the two is preferably 5 to 30, and 7 to 25 mm is the best. In the disposable diaper 1 of the present embodiment, the change agent 10 line and the pattern 12 are spaced in the width direction of the diaper in the entire area of the long axis direction of the diaper, and are made in the part other than the lower part B, and even if they overlap There are disadvantages. 93231.doc -10- M262163 The reason is that the part with the most possibility to accept urination is the lower thigh B, so only at the lower thigh B, the change agent line 10 is separated from the pattern 12, and the observer can Fully recognize color changes. Even so, when the wearer is sleeping, urine may flow out of unexpected directions. Therefore, in the dorsal portion A and the ventral portion C, the change agent 10 line and the pattern 12 are also arranged in the width direction. Space up as well. Regarding the similarity between the 10-line color of the change agent and the 12-color color of the pattern, as long as an observer who has a thorough thinking about it can think of it, it can be regarded as similar. In order to further improve the recognition, you can use a 24-color color card that is classified according to the Ostwald hue ring. It is better to use the same color card or the hue number within the range of 1 difference. The change agent 10 used in this creation will be described below. The modifying agent is a hydrophilic composition containing a substance (hereinafter referred to as a discoloring substance) that causes a visual change upon contact with moisture. Examples of the color changing substance include a pH indicator. For example, well-known inks or indicators can be used. As the pH indicator, when the absorbent article 'is a disposable diaper as in this embodiment, it is suitable to use a color change that occurs before and after contact with urine. For example, Mopan Blue, Methyl Orange, Alizarin S, Mo, Cresyl Green, Methyl Red, Mocresol Purple, & esazurin have a color change range of pH 3-7. Prior to contact with moisture, the changing agent 10 needs to be stably fixed to the surface of the inner sheet 3 and / or the second liner paper 42b. A simple and effective way to achieve this fixation is to apply the change agent 10 to the surface of the inner sheet 3 or the second liner paper 42b as a hydrophilic composition made by mixing a color changing substance and an adhesive substance. As a consideration of the compatibility of the adhesive substance ' -based discoloration substance, 93231.doc M262163 is preferred to be hydrophilic. Examples of such a substance include a polymer, which is a hydrophilic polymer that functions as an adhesive for the second backing paper 42b and the back sheet 3 before coming into contact with water. As the hydrophilic polymer, for example, any one of polyethylene glycol (PEG), polypropylene glycol (PPG), polyvinyl alcohol (pvA " polyamine, vinylpyrrolidone homopolymer, etc.) can be used. The average molecular weight of these hydrophilic polymers It is preferably between 1000 and 50,000, especially between 2000 and 20000, because it can provide a fixed fixing effect. The cesium pattern 12 does not change visually even when it is exposed to moisture. Specifically, even if The color does not change or disappear even when exposed to moisture. Printing this pattern is suitable and uses water-insoluble ink. Examples of this ink include nitrocellulose-based inks, polyamide-based inks, Acrylic ink, dye-based ink, etc. The pattern 12 may be provided on the facing surface of the second liner paper 42b of the inner sheet body 3, or the facing surface of the cover 7. In this embodiment, the pattern 12 is provided on the facing surface of the cover 7, so it passes through the cover. 7 can also clearly see the pattern 12. As in this embodiment, in the case where the visual change of the change agent 10 depends on the color change, before the change agent 10 visually changes, from the outside of the diaper The lightness L * measured on the 3 sides of the body is preferably between 15 and 80, preferably between 20 and 70; after vision moxibustion, the lightness L * is between 20 and 80, preferably between 30 and 8 In addition, the pattern 12 lightness L * measured from the 3 sides of the outer sheet of the diaper is preferably between 30 and 90, preferably between 35 and 90, and between 40 and 90. It is best to see the bright pattern 12 through the inner sheet 3 or the outer cover 7. When the color of the change agent 10 and the color of the pattern 12 are not similar, the brightness L * before the change of the change agent 10 is visually similar. It is better that the lightness L * of the pattern 12 is smaller than 93231.doc -12- M262163 1 ~ 15. On the contrary, when the color of the change agent 10 and the color of the pattern 12 are not similar, the color change of the change agent 10 is not similar. The lightness L * is preferably 1 to 15 smaller than the lightness L * of the pattern 12. In any case, the difference between the lightness L * after the visual change of the change agent 10 and the lightness L * before the change is preferably -10 to 5 Therefore, although the urination change agent line can be recognized by the observer, it is relatively inconspicuous compared to the pattern 12, so it is beneficial to improve the pattern of the diaper i. On the other hand, in the case that the change agent 10 line changes to a similar color of the pattern 12 after urination, the observer sees that the area of the pattern 12 is enlarged, so it causes a sense of disharmony. On the contrary, it changes to the pattern. In the case of different colors, it gives the observer the impression that the line is floating out. Therefore, it is beneficial for the observer to know exactly when to change the diaper. In order to further improve the visibility of the diaper in this embodiment, the lining changes. The paperboards 42a and 42b are preferably hydrophilic. In addition, the basis weight of each paperboard is preferably 5 to 30 g / m2. In addition, in order to make the modifier 10 firmly adhere to the second paperboard 42b, the modifier 10 It does not penetrate into the absorbent core 41, and the basis weight of each liner paper is 5-30. In this embodiment, because the first liquid reaches the inner sheet body 3, g / m2 at an appropriate speed, especially 10 ~ 20 g / m2 is the optimal liner paper sheet and the second liner paper—composed of the same kind of thin paper, Therefore, the two rough sheets 42a and 42b have the same basis weight and the same thickness. In order to clearly recognize the change agent_visual change from the outside of the diaper, it is preferable that the liner papers 42a and 42b have low transparency and high whiteness. Transparency is better than the following. The L * a * b * color of the whiteness is the color coordinate index b * value of the spinning system (CIE1976), which is 3 ~ negative value, and it is more suitable to use Qiao, especially, and Wu to 0 ~ · 5. Liner paper 42 having such transparency and whiteness, such as 1J, can be obtained by using bleached 93231.doc -13 · M262163 pulp, or adding filler to the liner paper. The absorbent core 41 also preferably has a high whiteness. L * value and b * value were measured with a color difference meter. In this creation, the portable spectrophotometer NF777 (trade name) of Nippon Denshoku Industries Co., Ltd. was used in the measurement conditions of lighting condition C, viewing angle 2, front light = 0/45, and beam diameter φ10mm. Next, several sheets of backing paper were stacked on the back side of the measurement sample to have a thickness of 5 mm or more. The change agent 10 is recognized from the outside of the diaper through the inner sheet 3. Therefore, as the inner sheet body 3, in order to improve its visual recognition, it is better to use a high transparency: but if the transparency is too high, the excrement may be seen through the outside of the diaper. From this viewpoint, the light transmittance of the inner sheet body 3 is preferably from 30% to 80%, particularly from 35 to 80%. The transmittance of the back sheet 3 was measured as follows. <Measurement method of light transmittance> Nine 砑 1 肷, cracked, trade name "HR-100", A light source was used as the light source, and the total light transmittance Tt was measured.意 10 points on the inside of the sheet, and the average value is taken as the light transmittance value. = In addition to the aforementioned light transmittance, the sheet body 3 preferably has liquid resistance and moisture permeability. The inside allows moisture permeability, and the value of the sample after 1 hour of storage is fine. It is suitable for passing through the diaper, ㈣, ㈣, and 防止 to prevent leakage of body fluids. $ 耆 4, as a raw material that has liquid resistance and moisture permeability and can be used for the inner sheet body 3M, for example, there is a porous film ϋ # 脱 月 体 3 原, j For example, a hydrophobic thermoplastic resin, 93231 .doc -14- M262163 * Composed of: fine inorganic fillers made of materials such as osmium calcium, or dissolved and mixed with the resin, organic molecules, etc. to form a thin film, and who is 丄 穸, early σ or Two-way drawing can obtain a porous film. An example of a thermally active compound is a polyolefin. As the polyolefin, materials such as low-density polyethylene, linear low-density polyethylene, polypropylene, and κ butane can be used alone or in combination. Perforated surface: The raw material of the body 3, if the basis weight is 10 ~ 4 ° g / m2, the visual change of the change agent ιο is easy to be recognized from the outside of the diaper, and the soft touch can also be obtained. It's very suitable. In order to facilitate the recognition of the change in the sense of change of the change agent, the outer cover 7 has a predetermined light transmittance: it is better that the light transmittance of the outer cover 7 is more than 55%, especially more than 60%. In order to be able to see through the changing agent 1G from the outside of the diaper, = weight / thickness of the residual cloth in order to obtain the aforementioned light transmittance. This non-woven fabric ^ 5 45 g / m ', especially when it is 10 to 40 g / m2, recognizes the visual change of the' changing agent 10 'and the sensory properties such as fabric style and hand feel. For example, it can be mentioned that it is composed of polyesters such as polyethylene glycol and: r #,: hydrocarbons, polyethylene terephthalate, and other thermoplastics. I use one kind of wax to make fibers, or use more than two kinds of trees Said to have a core-type, and side-by-side type | Non-woven. … With structured composite fibers, and woven into: = = the non-woven fabric material, it is suitable to use identification material with high background transparency, because it can improve the recognition of the visual change of the change agent 10. Among them, the outer cover 7 'overlaps the area containing the change ㈣ 93231.doc -15 · M262163 in the thickness direction of the diaper. Most of the overlapping area is preferably white, and in the non-overlapping portion, the change agent 1 is not hindered. It is also possible to perform printing within the recognizable range of 0 visual changes. As the backing paper for covering the absorbent core 41, a material as shown in Fig. 3 may be used instead of the material shown in Figs. In FIG. 3, the absorptive core 4j is covered by a piece of liner paper 42, and the left and right side portions 42c, 42d of the liner paper 42 face each other on the absorptive core 41 on the opposite side of the sheet body 3 with a certain width, Become two floors. Further, the two-layered liner paper 42 is provided with a change agent 10. By adopting such a structure, it is possible to improve the visibility of the visual change informing the diaper 1 when it is changed. The mechanism for improving the visibility of the visual change in the embodiment shown in FIG. 3 is estimated as follows (1) to (3). (1) The urine reaches the place where the change agent 10 exists, and the change agent 10 changes color. At the same time, the change agent 10 is dissolved or dispersed in the urine and transferred to the first liner paper 42a which is in contact with the inner sheet body 3. The modifier 10 must also be transferred from the i-th liner paper 42a to the second liner paper 42b on the absorbent core 41 side. However, most of the modifiers are due to the following reasons (2) and (3). 10 remains on the first liner paper 42a, and is hardly transferred to the second liner paper 42b. (2) The second liner paper 42d is already in a wet state when urine is transferred to the inner sheet body 3. Therefore, it becomes difficult to absorb more liquid. This is also considered to be a reason why the change agent 10 is hardly transferred to the second liner paper 42d. (3) The presence of the second backing paper 42d prevents the first backing paper 42c in contact with the change agent 10 from coming into contact with the absorbent core 41. Therefore, it is possible to prevent the change agent 93231.doc -16- M262163 from being diffused in a planar direction by the absorbent core 41 and the color of the change agent 10 becoming light. In FIG. 3, the first liner paper 42c and the second liner paper 42d, which overlap each other, preferably overlap with at least a part of the diaper 1 in the thickness direction of the area containing the change agent 10, using hydrophobic adhesion. Adhesives such as (hot melt adhesives) make them adhere to each other. Therefore, it is possible to prevent the urine from spreading in the width direction of the diaper on the i-th liner paper 42a, and it is possible to suppress color penetration due to the diffusion of the change agent 10. The absorbent article of this creation is not limited by the foregoing embodiments, and various changes can be made without departing from the purpose of this creation. For example, as a material for covering the absorbent core 4, it is possible to use a hydrophilic nonwoven fabric instead of the aforementioned liner paper composed of thin paper or the like. In addition, in the foregoing embodiment, the fixing belts 8 and 8 are provided on the left and right edges of the back side A. Alternatively, the left and right sides of the back side A may be replaced with a pair of waist belts. And at the end of a waist belt, a fixing belt portion is provided. Through this fixing portion, the left and right waist loops can be fixed on the abdomen or back of the wearer. In addition, the aforementioned embodiment is related to a deployment type disposable diaper, and the present invention can also be applied to other absorbent articles, such as a pant type disposable diaper, a sanitary napkin, a sanitary short, and the like. As detailed above, the absorbent article of this creation, .M T at σ knows the visual change of the timing of urination change ’can be easily identified from the outside of the diaper [Simplified illustration of the figure] 仃 Identify. FIG. 1 is a partially exploded plan view of a dismantled u-type diaper as an embodiment of the present invention, viewed from the side of a lonely sheet. 93231.doc • 17- M262163 Figure 2 is a cross-sectional view of the line II-II in Figure 1. Fig. 3 is a sectional view showing another structure of the absorbent body (equivalent to Fig. 2). [Description of component symbols] 1 Disposable diaper (absorbent article) 2 Table lining 3 Inside sheet 4 Absorber 5 Waist 6 Leg 7 Cover 8 Connection belt 9 Positioning belt 10 Change agent 11 Three-dimensional protective layer 12 Pattern 41 Absorbent core 42 Liner paper 42a, 42c First rough paper 42b, 42d Second liner paper 51 Waist elastic material 61 Leg elastic material 111 Three-dimensional protective layer elastic material A Back side B Bottom C C Ventral portion 93231.doc -18-