201039790 六、發明說明 【發明所屬之技術領域】 本發明’是具有吸液性的血水用薄片，更詳細說，是 關於很適合用來吸收從肉品等所滲出之血水的血水用薄片 及其製造方法。 【先前技術】 Ο 以往’對於從放置在聚苯乙烯發泡體（保麗龍）製等 之托盤中的魚肉切塊或是牛肉切片所滲出的血水，用來吸 收該血水的薄片，已爲一般所周知。例如，於專利文獻 1’已揭示由具有：上層薄片爲具有複數個開孔之透液性 的熱可塑性塑膠薄膜，以及下層薄片爲吸液性之纖維不織 布所構成之2層構造的血水用薄片。 [專利文獻1]日本特開平09-40026號公報 〇 【發明內容】 [發明所要解決之問題] 在專利文獻1所揭示的血水用薄片中，是利用切縫刃 於上層薄片的上表面形成有切縫，藉此形成階段狀的開 孔，可以在比較短時間內吸收血水，並且可以掩蔽所吸收 的血水而從外部不會被辨識出來。 不過，爲了安定地對上層薄片的上表面施以切縫加 工，上層薄片要有比較高的剛性，而且下層薄片是由纖維 不織布所形成，由於難以變皺而不易折彎，所以在將食材 -5- 201039790 整體以血水用薄片包裹時就不易於使用，而無法維持該包 裹後之狀態的形狀。 爲了解決如此之問題，雖亦曾考慮對於上層薄片使用 剛性比較低的薄片構件，不過此情形時，就會導致降低回 滲再濕防止功能、血水用薄片易於捲曲等缺失，而有血水 吸收性能以及包裝操作性降低之虞。 因此，在本發明中，是以提供一種可以一面保持所需 要的血水吸收性能以及包裝操作性，同時彎曲剛性較低之 柔軟的血水用薄片來作爲課題。 [發明解決問題之技術手段] 爲了解決上述課題，作爲本發明之對象，爲包含：上 表面與下表面、及具有透液性的上層薄片、及被接合於上 述上層薄片的上述下表面之具有吸液性的下層薄片，所構 成的血水用薄片。 作爲本發明之特徵，係在於：上述上層薄片，是由爲 了使從載置於上述上層薄片之上述上表面的食材所滲出之 血水朝向上述下層薄片移動，而具有朝向上述上層薄片的 厚度方向延伸之導液部的熱可塑性塑膠薄膜所形成；上述 下層薄片爲濕式皺紋加工過的皺紋紙。 本發明，除了作爲上述特徵之構成以外’包含以下之 較佳的實施形態。 (1)上述上層薄片的上述導液部，是相互地鄰接於 上述上層薄片的平面方向並排列成規則性的複數個開孔。 -6 - 201039790 (2) 上述上層薄片的上述導液部，是相互地鄰接於 上述上層薄片的平面方向並排列成規則性的複數個切縫。 (3) 上述導液部，係具有：從上述上表面朝向上述 下表面側縮小孔徑的管狀部。 (4 )上述下層薄片的皺紋率爲1 0 %〜3 0 %，質量爲 25 g/m2 〜80g/m2° (5) 上述下層薄片在製造時之機械方向上的濕潤時 〇 伸長率爲ίο%以下。 (6) 上述血水用薄片之回滲再濕量爲〇.2g以下。 (7) 包含以下之製程的血水用薄片的製造方法：在 藉由濕式皺紋加工形成上述下層薄片，而對上述下層薄片 賦予有朝向將之捲出時之上述機械方向施加的拉張力之狀 態下，將上述下層薄片與上述上層薄片予以接合之製程。 [發明效果] 〇 本發明之血水用薄片，係具有：上層是由熱可塑性塑 膠薄膜所形成，下層是由濕式皺紋加工之皺紋紙所形成的 複合層構造，由於剛性較低而柔軟，因此在被覆包裹食材 整體時易於折彎，並且可以維持該狀態之形狀。又，對於 下層藉由使用皴紋紙，可以提升液體擴散性及吸液性，並 且可以抑制回滲再濕現象。又，不利用乾式皺紋加工，而 藉由施以濕式皺紋加工，即使吸收血水後，也能夠維持血 水吸收前的尺寸，所以可以防止血水用薄片捲曲。 201039790 【實施方式】 <第1實施形態> 第1圖，是血水用薄片10的平面圖；第2圖，是第 1圖之E-Π線的斷面圖。又，於第1圖中，以MD的箭頭 表示製造時的機械方向，並以CD的雙向箭頭表示與其垂 直相交的方向。 如第1圖及第2圖所示，血水用薄片10，具有上表 面1 〇A、以及下表面1 0B，並包含：由熱可塑性塑膠薄 膜，更佳爲，由厚度 0.3mm〜0.35mm，質量10g/m2〜 3 0g/m2，密度0.03g/cm3〜0.1 Og/cm3之低密度聚乙烯等之 聚烯烴系的熱可塑性塑膠薄膜所形成的上層薄片1 1 ;及 由厚度 0_25〇1111~0.3011111[1，質量45§/1112〜100经/1112，密度 0.15 g/cm3〜0.4Og/cm3之皺紋紙所構成的下層薄片12 ; 以及接合上層薄片11與下層薄片12的熱熔接著劑所形成 的中間層1 3。 於上層薄片11，於其平面方向（XY方向）相互地鄰 接並規則地排列形成有··從上表面1 〇A朝向下表面1 0B 將上層薄片1 1貫通之通氣透液性的複數個開孔（導液 部）1 4。開孔1 4，係具有其斷面形狀分別大致相同的圓 形狀。血水用薄片1 〇的上表面1 〇 A，亦即，藉由將肉品 或蔬菜等之生鮮食材載置於上層薄片11的上表面10A 側、或是以血水用薄片1 〇將食材整體包住，從食材滲出 之液滴，通過開孔1 4，藉由毛細管現象而朝向下層薄片 12移動。開孔14，除了圓形之外’亦可爲具有矩形、三 -8" 201039790 角形等之各種的斷面形狀者，且除了排列成格子狀、或是 波浪狀、交錯狀等之各種的排列模樣以外，爲了達到裝飾 效果’也可以是表現出從外部可以辨識的文字或是圖案 者。 下層薄片1 2，是用以吸收並保持住從食材滲出之血 水者’且是由濕式皺紋加工所加工過的皺紋紙所形成。對 於形成下層薄片1 2之皺紋紙的原材料，可以使用一般性 Ο 的紙漿纖維原料，除了闊葉樹及針葉樹的木材纖維之外， 可以組合木材以外的植物纖維或是合成纖維等。不過，從 皺紋紙的拉伸強度來考量則以針葉樹的紙漿纖維較佳。 又’爲了提升皴紋紙的吸收性能，以進行親水化增強處理 爲佳_。 下層薄片12是比上層薄片11還薄且爲高密度，且由 於是由吸水性優秀的皺紋紙所形成，所以藉由毛細管現象 可以瞬間性地使從食材滲出的血水，從上層薄片1 1朝向 Ο 下層薄片12移動。 對於形成下層薄片1 2的皺紋紙，係藉由濕式皺紋加 工，形成有朝向：與製造時之機械方向（MD方向）垂直 相交的方向（C D方向）延伸的複數條皺線（皺紋）1 5。 作爲下層薄片12，相較於氣流成型（air laid)不織布等 之其他的薄片構件，由於使用柔軟的皴紋紙，所以可以減 低血水用薄片1 0整體的彎曲剛性，在包住食材整體時可 易於折彎，並且折彎後的復元性較低。又，皺紋1 5具有 作爲吸收溝的作用，更加提升對血水的擴散性及吸水性， -9 - 201039790 並可以抑制被吸收後之血水倒流回滲（回滲再濕）。 在此，所謂濕式皺紋加工，是意指在皴紋紙的製造過 程中，使該紙材料處於濕潤狀態時進行皴紋加工。 作爲形成下層薄片1 2的皴紋紙並非是乾式皺紋紙， 而是以濕式皺紋紙爲較佳。從血水用薄片的吸收性及柔軟 性的觀點來考量，雖然一般是以乾式皺紋紙爲佳，但是在 使用過乾式皺紋紙之情況後，由於血水吸收後的尺寸變化 較大，在包裹食品時會造成血水用薄片1〇捲曲，而難以 包住食品。另一方面，只要是具有相同基重及皺紋率的濕 式皺紋紙與乾式皺紋紙，若只從吸收性及柔軟性的觀點來 考量，是以乾式鈹紋較佳，但是對於如前所述地在包裹食 品之情況時，在吸收後會造成捲曲，因此從包裹食品此事 之操作性的觀點而言是以濕式皺紋紙較佳。 亦即，將乾式皴紋紙使用在下層薄片1 2之情形時， 在血水被吸收之後，會造成皺紋1 5朝向MD方向延伸過 去，使得血水用薄片1〇整體隨意地捲曲，不過於使用濕 式皺紋紙之情形時，即使血水被下層薄片1 2吸收後’皺 紋1 5並不會朝向MD方向延伸’由於在血水吸收前後產 品尺寸並無變化之情形’所以血水用薄片1 〇整體不會有 容易捲曲之情形。因此’在以血水用薄片1 0包裹食材整 體之方式予以被覆包裹後’即使下層薄片12吸收了從食 材所滲出的血水’血水用薄片1 〇 ’可以維持被覆包裹後 的狀態形狀。反觀使用乾式皺紋紙之情形時，由於在被折 彎的狀態下吸收過血水時的形狀復元性較高，所以無法維 -10- 201039790 持包裹有食材的狀態’而恐有使血水漏出於外部之虞。 進一步地說明，在製造程序上的優點，於濕式皴紋加 工時，由於水分含有率較高，所以在製造程序中在將下層 薄片12裁斷時’裁斷端面的纖維或紙漿雖成爲粉狀但不 會有飛揚出外部之情形。反觀在乾式皺紋加工之情形，由 於裁斷端面的纖維或紙漿成爲粉末狀而散逸出外部，所以 在製造工程上，得費事將該等去除以及進行裁斷製程的管 〇 理、檢査等。 下層薄片12，爲了具有適當的吸水性與柔軟性，皴 紋率，以1 0%〜3 0%爲佳。於1 0%以下之情形時，柔軟性 較低而難以折彎，在包裹食材時不易操作，而於30 %以上 之情形時，會變得過度地膨鬆而難以操作，並且下層薄片 1 2的強度降低，而有不能充分發揮保液性之虞。 中間層13，其用來接合上層薄片11與下層薄片12 之熱熔接著劑是以質量1 g/m2〜5 g/m2的比率來使用。熱 〇 熔接著劑，雖然可以以螺旋狀或是點狀等之各種塗佈加工 圖案斷續地進行塗佈，不過爲了不會阻礙上層薄片11之 開孔1 4的通氣透液性，所以以比開孔1 4之孔徑尺寸還窄 的寬幅來進行塗佈加工較佳。又，在本發明中，上層薄片 11與下層薄片12雖是藉由熱熔接著劑而接著，不過也可 以利用熱密封、超音波密封等之各種熱熔著手段來接合。 第3圖，是第2圖的部分放大圖。 開孔1 4，係具有從開孔1 4的周緣1 4 a朝向上層薄片 1 1之厚度方向延伸的管狀部1 6。管狀部1 6 ’係具有由開 -11 - 201039790 孔1 4之周緣1 4a所構成的上端開口孔徑D 1、以及與下層 薄片12相對向的下端開口孔徑D2。管狀部1 6係具有孔 徑朝向下方縮小而成爲漏斗狀，其上端開口孔徑D1是比 下端開口孔徑D2還大。如此地，管狀部16爲孔徑朝向 下方縮小之情形時，由於毛細管現象愈是接近下層薄片 1 2愈顯著，所以可以使進入到開孔1 4的血水快速地朝向 下層薄片12移動。又，管狀部16是隨著朝向下方而縮小 孔徑，且由於上層薄片u比下層薄片12還要厚，所以即 使食材被載置在上層薄片11的上表面10A，使得血水用 薄片1 〇整體受到加壓時，也可以抑制被下層薄片1 2所吸 收的血水朝向上層薄片1 1的方向回滲。 爲了達到上述效果，具體而言，上端開口孔徑D1爲 0.5mm〜2.0mm，下端開口孔徑D2爲 0.1mm〜1.5mm爲 佳。又，雖沒有圖示出來，但上下端開口孔徑Dl、D2以 相同尺寸亦可。 <第2實施形態> 第4圖’是顯不另一實施形態，與第1圖相同之血水 用薄片10的平面圖；第5圖，是於第4圖中之V-V線的 斷面圖。由於在本實施形態中之血水用薄片10的基本構 成，是與第1實施形態相同，所以以下僅對於相異處進行 描述。 在本實施形態中，於上層薄片1 1，形成有排列成交 錯狀的複數條切縫1 7 (導液部）來取代第〗實施形態的 -12- 201039790 開孔。切縫1 7，由於是延伸於上層薄片1 1的厚度方向， 而貫通上層薄片11，所以從被載置在上層薄片11之上表 面1 0 A側的食材所滲出的血水，會通過切縫1 7並快速地 移動到下層薄片1 2，而被下層薄片所吸收、保持。又， 切縫1 7，係與第1實施形態的開孔1 4相同樣地，是以隨 著朝向下方而寬幅變狹窄的方式所形成，因此具有與開孔 1 4相同的效果。又，雖沒有圖示出來，爲了使血水的吸 〇 收速度更加地提升，亦可以將切縫1 7形成在具有複數個 開孔1 4的上層薄片1 1。 第6圖，是顯示製造形成下層薄片12之濕式皴紋紙 之製程的一部分的圖面。 以捲取輥筒（圖示省略）將藉由成型（forming )製 程所形成的薄片狀皴紋原紙2 0的一端予以捲取固定，並 將另一端側沿著朝向機械方向輸送的下側毛氈（felt ) 2 1 連續性地搬運，一面通過相互反方向旋轉的上輥筒22與 Ο 第1下輥筒23之間，並一面壓平脫水。脫水之後，將在 濕潤狀態下的皺紋原紙20 —面壓接於上輥筒22的表面， 並一面於其上表面抵接於刮刀24，藉由以將之拉剝之方 式沿著位於上方位置的上側毛氈25進行搬運，而將規則 性的皺紋圖案施加賦予於皺紋原紙20。 皺紋原紙20之皺紋率，可以依在壓平製程中之成爲 上下輥筒22、23旋轉速度之下側毛氈2 1的周速度與上側 毛氈25的周速度之差來決定。沿著上側毛氈25被搬運的 皺紋原紙20，係在圓筒狀的乾燥器26與第2下輥筒27 -13- 201039790 之間一面被吹拂熱風而一面通過，成爲完全乾燥之狀態， 然後被捲取。 藉由如此之製造製程所形成的濕式皴紋紙，由於是在 濕潤狀態下形成皺紋再被乾燥，所以比起乾式皺紋紙，皴 紋1 5的縐褶會變得不易延伸。吾人認爲此乃，相較於乾 式皴紋加工，於濕式皺紋加工的情形下，在皺紋1 5中的 氫鍵結合變強的緣故。 對於捲取後的皺紋原紙20 (下層薄片1 2 )，是賦予 施加於MD方向上的拉張力來捲出，下層薄片12，是夾 介形成中間層13的熱熔接著劑而與形成上層薄片11的熱 可塑性塑膠薄膜接合。如上所述，在接合之時，對於下層 薄片12，雖作用有施加在將其捲出時之MD方向上的拉 張力，但由於藉由濕式皺紋加工使皴褶不易延伸，所以皺 紋1 5不會有鬆解的情形。因此，在接合上下層薄片1 1、 12形成血水用薄片10之後，作用有皴紋的復元力，亦 即，作用有要回復到原本皺紋加工後之狀態的力量，所以 血水用薄片整體不會有造成捲曲的疑慮。 另一方面，反觀藉由乾式皺紋加工來形成皺紋原紙 20之情形時，藉由施加在將之捲出時之MD方向上的拉 張力，而造成皺紋整體延伸。因此，下層薄片12 ’是維 持在皺紋1 5延伸後的狀態就直接與上層薄片Π接合’所 以在將兩薄片11、12接合之後’於下層薄片12’皺紋15 作用有要回復到原本之狀態的力量’因而使得血水用薄片 1 〇整體即使處於乾的狀態也有易於捲曲之虞。 -14- 201039790 表 紋 皴 式 濕 種 數 複 造 製 下 件 條 的 樣 各 式 各 在 是 較 比 相 品 產 的 往 以 與 1 以 第用 紙 者 匕匕 叫目 性 或 性 特 其 價 評 來 ο ο 【迤紙】 0 m 堪 η <〇 to o CO (D cs lO r> CN s CD 〇 in ir? s oi Γ- ΓΟ CM \n r> O (D <〇 5 d ο m 5 ο s 〇 d η s ίο Oi d ο s ^τ d r- d X d Oi B 5 s in in 〇 Ο CNt 0 © CO n o 〇 kO CO o' 〇 to CO d 〇 g 〇> ci ci CM r> O 之 o p in 沒 ο ο \n (O o o i. in d s ri to s <〇 CO 6 o s C>J X CO 00 CN< o 〇> σ> § Ο) m ta to X ΙΟ cni 〇 Θ 愆 ±3 <〇 卜 S o s (n o' s o in ri (O <〇 o' 0 01 C5 cn p \η Ο ο in o d CM (O σ> «Μ d o s o o s o 〇 in 3 d 〇 K 〇· 8 CM ι〇 (6 σ> to κ Ο Ο X @ m 提 概 CD g s o o d s U7 σ> d s 00 oo o V ci C>J rs o o o d m U1) ο ο in to O d 吋 ύ o d o s d a (〇 〇> 卜 d in CO o 0 m S d s esj £ CM ιη Ο) <〇 s 〇 0 m 握 艇 寸 ,π' o g ΟΊ d s m to o CO 5 o 令 r> CM cn n d 艺 o o ΙΑ Ο ο tn (O o d ο to CM 09 d S o’ <〇 o' 00 (n CO C4 d 〇 00 00 d 5 Λ ιη CSJ ίο CD 2 〇 00 (C> 〇 @ 匡 m (Ο 芝 d iO 〇> cn m σ s § o r> o o ci 〇 o o 之 o o ιτ> ιη ο ο m to o o CM <〇 d s ό d S § o 〇 r·» s 〇 a> at in (Ο σ> (〇 ΐο Ο Oi o © m 极 cq u> o CM to o s o s to CO d , ri <s r> CO O p ιτ> ο m 呂 o o 9 (O o 2 o d S o tn ΙΛ d 〇 s o O) 1/) 卜 r- § η «ο 〇 CO ai 〇 握 CN in o s s o o CM s 00 00 d C5 eg Ci cn O o d ιη ιη ο ο in CO o ό CO 每 CM d S o in o rj s CM 〇 Ο r>- s o r* C5 r- ao in 〇 r? V? o Θ m 辑 (O o iO P- to o o to CM £ σ> CO d 呀 H CM n <n 〇 o o (η ο ο in (O o c» CSl OJ § d ao ΟΪ in 〇 <〇 00 CM d 〇 σ) S O O 卜 卜 〇 (Ο in 〇 (O ci 〇 'ω m s m M Q S Q CJ 摩 ίΓ Η- 'ω 明 sk 1 i o s .枳 G U 增 I feS 赃 •i： •ft Q •ft Q 〇 輕 ίΓ Η- rrfJ 坻 i 滟 回 Έ "m 啊 §s 'bb Ε 面 Η- s-/ 躑 3 现 H- § -Μ rrSL 坻 承 w 瞰 s： 薛 m BiZ s m υί i ir (Λ LJ i «Γ CO UJ 结 m 自 雜 •H dC ts H- 嫌 m » 載 $ 担 租峨 雜 m 雄 m 狴 i -15- 201039790 〔測量方法〕 <薄片的厚度> 依據 JISL1096. 6. 5之規格，使用桌上厚度計 (MITUTOYO公司製，測量面φ 50.5mm，測量壓力 3g/cm2 )進行測量。首先，從各薄片切取 1 0 0mm X 1 0 0mm 的樣本，以位於上下位置的圓盤安靜地夾入樣本的中心， 求取此時之測量器的數値（N= 1 0 )。 < KES (彎曲）値〉 從各薄片切取lOOmmxlOOmm的樣本，將樣本對準並 配置在自動化純彎曲測試機（加藤科技（Kato Tech Co.， Ltd )製）之測量台的導引線，固定於夾頭的中央進行了 測量。於MD方向' CD方向分別測量5次。 <吸水量與保水量> 從各薄片切取140mmx60mm的樣本，測量各樣本的 質量（Ag )。測量重量之後，將樣本放置在1 0網目的金 屬網上，然後將樣本整體浸在注入於托盤的測試液（自來 水、生理食鹽水、食用油）中。於測試液中浸泡3分鐘之 後，從托盤將樣本包含整個金屬網取出，稍微瀝乾後’靜 置5分鐘。然後，測量金屬網與樣本的質量（B g ) ’再將 樣本卸取下，僅測量金屬網的質量（Cg )。然後，將樣本 置於樣本台之上，將42 Og的配重載置於樣本上’如此放 置3分鐘。在3分鐘之後，測量樣本的質量（Dg )。使 -16- 201039790 用由上述的測量方法所求得的値（A〜D )，藉由下述的 計算方法，求取吸水量、保水量。測量爲進行3次，以其 平均値作爲各薄片的吸水量與保水量。 吸水量（g/m2) =( B-C-A) /0.06/0.14 保水量（g/m2) =( D-A) /0.06/0.14 <擴散性> 〇 從各薄片切取65mmxl 00mm的樣本，設置於自動注 入機。以1.0ml/3sec之條件，將生理食鹽水從離樣本 1 0mm的上方位置朝向樣本的中心滴下。滴下經過3分鐘 後，測量血水用薄片的上表面、下層薄片的上表面、下層 薄片的下表面的擴散寬幅（mm) ( N = 5 )。 <鮮度保持判定> 作爲鮮度保持試驗，是使用鮮度試驗機（QS-O SOLUTION公司製）進行K値測量法。K値，爲生鮮度的 指標，是顯示食材的 ATP被分解而產生肌苷（inosine ) 和次黃嘌呤（hypoxanthine)的蓄積程度，具體上，是將 生的鮪魚的切塊載置於樣本薄片，求取在設定爲4°C的冷 藏庫內保存〇、1、2天後之切塊的鮮度（K値）。 <鮮度保持的評價方法> 上述試驗的結果，得知下層薄片之回滲再濕爲2.0g 以下之情形時，鮮度（K値）經過1〜2日後就會惡化》 -17- 201039790 因此，下層薄片之回滲再濕爲2.0g以下之情形時爲良好 (〇），於2.0g以上之情形時，當作爲不良（X )。 <濕潤時伸長率> 從各薄片切取150mmx25mm的樣本，從離樣本的兩 端緣2 5 mm之處以油性筆做記號，然後將樣本整體浸在注 入於托盤的自來水中。在自來水中浸泡1分鐘之後，從托 盤取出樣本，測量記號的間隔尺寸（尺寸E ) ( N = 3 )， 並藉由以下的計算，來求取濕潤時伸長率（％ )。 濕潤時伸長率 =(E - 1 0 0 ) / 1 0 0 X 1 〇 0。 <捲曲判定> 求取以〇.lN/25mm之應力來拉張血水用薄片時之捲 曲的比例。 <捲曲的評估方法> 藉由上述方法來求取各血水用薄片10之捲曲的比 例，並了解到各血水用薄片1 〇之下層薄片1 2之濕潤時伸 長率爲10%以下時，是難以捲曲，於10%以上時，是易於 捲曲。因此，以下層薄片1 2之濕潤時伸長率1 0%以下時 當作爲良好（〇），1 0 %以上時當作爲不良（X )。 <實施例1 > 作爲上層薄片11是使用由LDPE (低密度聚乙烯）所 -18- 201039790 製成的開孔塑膠薄膜，作爲下層薄片12是以NBKP (針 葉樹牛皮紙法漂白紙漿）作爲原材料，製成了質量 4 8 g/m2，皺紋率1 0 %的濕式皺紋紙來使用。 <實施例2 > ‘使用與實施例1相同的上層薄片11，作爲下層薄片 12是以NBKP作爲原材料，製成了質量48g/m2，皺紋率 〇 20%的濕式皴紋紙來使用。 <實施例3 > 使用與貫施例1相同的上層薄片11，作爲下層薄片 12是以NBKP作爲原材料，製成了質量48g/m2，皺紋率 3 0 %的濕式皺紋紙來使用。 <實施例4 > Ο 使用與實施例1相同的上層薄片11，作爲下層薄片 I2是以NBKP作爲原材料，製成了質量48g/m2，皺紋率 2 0 %的濕式·乾式皺紋紙來使用。 <實施例5 > 使用與實施例〗相同的上層薄片11，作爲下層薄片 12是以NBKP作爲原材料，製成了質量25g/m2，皴紋率 2 0 %的濕式皺紋紙來使用。 -19- 201039790 <實施例6 > 使用與貫施例1相同的上層薄片1 1，作爲下層薄片 12是以NBKP作爲原材料，製成了質量25g/m2，皺紋率 2〇%的濕式皴紋紙來使用。 <比較例1 > 使用與實施例1相同的上層薄片11，作爲下層薄片 12是以ΝΒΚΓ作爲原材料，製成了質量48g/m2，皺紋率 2 0 %的乾式皺紋紙來使用。 <比較例2 > 使用與實施例1相同的上層薄片11，作爲下層薄片 12是以NBKP作爲原材料，製成了質量48g/m2之沒有實 施皺紋加工的濕式紙來使用。 <比較例3 > 作爲上層薄片11是使用由HDPE (高密度聚乙烯） 所製成的開孔塑膠薄膜，作爲下層薄片1 2是將合成纖維 與NBKP混合，製成了質量48g/m2之氣流成型（air laid)不織布來使用。 <評估> 如第1表之結果所顯示，於實施例1〜6中，只要下 層薄片12之質量爲25 g/m2〜48 g/m2，皺紋率爲1〇。/。〜 -20- 201039790 3 0%之間，分別在捲曲容易度、鮮度保持、捲曲的判定結 果爲良好（〇）。又，從實施例4的判定結果可以明瞭， 即使是濕式乾式皺紋紙，也可以得到與濕式皴紋紙相同的 判定結果。 在比較例1中，對於捲曲容易度、鮮度保持，其判定 結果雖爲良好（〇），但乾濕紙之情形時，由於下層薄片 1 2之皺紋在濕潤的狀態下朝MD方向延伸，而易於捲 〇 曲，故捲曲的判定結果爲不良（X)。 又，在比較例2及3中，由於對於下層薄片12是使 用沒有實施皴紋加工的濕式紙或是氣流成型不織布，因而 血水用薄片整體的剛性比較高，捲曲容易度爲不良 【圖式簡單說明】 第1圖是在第1實施形態中之血水用薄片的部分斷裂 平面圖。 第2圖是第1圖之Π-Π線斷面圖。 第3圖第2圖的部分放大圖。 第4圖是在第2實施形態中之血水用薄片的部分斷裂 平面圖。 第5圖是第4圖的V-V線斷面圖。 第6圖是顯示濕式皺紋紙之製造工程的一部分的圖。 【主要元件符號說明】 -21 - 201039790 1 〇 :血水用薄片 1 0 A :上表面 1 0B :下表面 1 1 :上層薄片 12 :下層薄片 14 :開孔（導液部） 1 5 :皺紋（皺線） 1 6 ·‘管狀部 17 :切縫 MD :機械方向 CD:與MD垂直相交的方向 -22-[Technical Field] The present invention is a sheet for blood water having liquid absorbing properties, and more particularly, a sheet for blood water which is suitable for absorbing blood water oozing from meat or the like and Production method. [Prior Art] 以往 In the past, the blood oozing from the fish diced or beef slices placed in a tray made of polystyrene foam (styrofoam) or the like, the sheet for absorbing the blood water has been It is generally known. For example, Patent Document 1' discloses a two-layer structure of blood-water sheet comprising an upper layer sheet which is a liquid-permeable thermoplastic plastic film having a plurality of openings, and a lower layer sheet which is a liquid-absorbent fiber nonwoven fabric. . [Problem to be Solved by the Invention] The blood-water sheet disclosed in Patent Document 1 is formed on the upper surface of the upper sheet by a slitting blade. The slit is formed to form a stepped opening, which can absorb blood water in a relatively short time and can mask the absorbed blood water and is not recognized from the outside. However, in order to stably apply the slitting process to the upper surface of the upper sheet, the upper sheet has a relatively high rigidity, and the lower sheet is formed of a fiber non-woven fabric, and it is difficult to wrinkle because it is difficult to wrinkle, so the ingredients are- 5- 201039790 When the whole body is wrapped with blood water, it is not easy to use, and it cannot maintain the shape of the state after the package. In order to solve such a problem, it has been considered to use a sheet member having a relatively low rigidity for the upper sheet, but in this case, the function of preventing the re-wetting and re-wetting prevention, the curling of the blood-water sheet and the like, and the blood-water absorption property are obtained. And the operability of packaging is reduced. In view of the above, it is an object of the present invention to provide a soft blood-water sheet which can maintain desired blood-water absorption performance and packaging workability while having low bending rigidity. [Means for Solving the Problems] The object of the present invention is to provide an upper surface and a lower surface, an upper layer having liquid permeability, and a lower surface bonded to the upper sheet. The liquid-absorbent lower sheet is composed of a sheet for blood water. According to a feature of the present invention, the upper sheet is formed to extend in a thickness direction of the upper sheet in order to move blood water oozing from the food material placed on the upper surface of the upper sheet toward the lower sheet. The thermoplastic film of the liquid guiding portion is formed; the lower sheet is a wrinkle paper processed by wet wrinkles. The present invention includes the following preferred embodiments in addition to the above-described features. (1) The liquid guiding portion of the upper sheet is a plurality of openings which are adjacent to each other in the planar direction of the upper sheet and are arranged in a regular manner. -6 - 201039790 (2) The liquid-conducting portion of the upper sheet is a plurality of slits which are arranged adjacent to each other in the planar direction of the upper sheet. (3) The liquid guiding portion has a tubular portion that is reduced in diameter from the upper surface toward the lower surface side. (4) The wrinkle ratio of the lower layer is from 10% to 30%, and the mass is from 25 g/m2 to 80 g/m2 (5) The elongation of the underlying sheet in the mechanical direction at the time of manufacture is ίο. %the following. (6) The amount of re-moisture re-wetting of the above-mentioned blood-water sheet is 〇.2g or less. (7) A method for producing a blood-water sheet comprising the following process: forming the lower sheet by wet crepe processing, and applying a tensile tension to the lower sheet to the mechanical direction when the sheet is wound up Next, a process of joining the lower layer sheet and the upper layer sheet. [Effect of the Invention] The blood water sheet of the present invention has a composite layer structure in which the upper layer is formed of a thermoplastic plastic film and the lower layer is formed by wet wrinkle-processed crepe paper, and is soft due to low rigidity. It is easy to bend when covering the whole packaged foodstuff, and the shape of this state can be maintained. Further, by using the crepe paper for the lower layer, the liquid diffusibility and the liquid absorbing property can be improved, and the phenomenon of rewet and rewet can be suppressed. Further, by applying the dry wrinkle processing, the wet wrinkle processing can maintain the size before the blood water absorption even after the blood water is absorbed, so that the blood water sheet can be prevented from being curled. [Embodiment] <First Embodiment> Fig. 1 is a plan view of a blood water sheet 10, and Fig. 2 is a cross-sectional view taken along line E-Π of Fig. 1. Further, in Fig. 1, the mechanical direction at the time of manufacture is indicated by an arrow of MD, and the direction perpendicular to the CD is indicated by a double-headed arrow of the CD. As shown in FIGS. 1 and 2, the blood water sheet 10 has an upper surface 1A and a lower surface 10B, and includes a thermoplastic plastic film, more preferably, a thickness of 0.3 mm to 0.35 mm. The upper sheet 1 1 formed of a polyolefin-based thermoplastic plastic film having a mass of 10 g/m 2 to 30 g/m 2 and a density of 0.03 g/cm 3 to 0.1 Og/cm 3 or less; and a thickness of 0_25〇1111~ 0.3011111 [1, a mass of 45 § / 1112 ~ 100 by / 1112, a lower layer 12 composed of crepe paper having a density of 0.15 g / cm3 ~ 0.4Og / cm3; and a hot-melt adhesive agent for bonding the upper sheet 11 and the lower sheet 12 The intermediate layer 13 is formed. The upper sheets 11 are adjacent to each other in the plane direction (XY direction) and are regularly arranged. The upper layer 1 〇A faces the lower surface 10B. The plurality of layers of the ventilating liquid permeating the upper sheet 1 1 are opened. Hole (liquid guiding portion) 14 4. The opening 14 has a circular shape in which the cross-sectional shapes are substantially the same. The upper surface of the blood-water sheet 1 is 〇A, that is, the raw material such as meat or vegetables is placed on the upper surface 10A side of the upper sheet 11, or the whole material is packaged in the blood-water sheet 1 The droplets oozing from the food material are moved toward the lower sheet 12 by capillary action through the opening 14 . The opening 14 may have various cross-sectional shapes such as a rectangular shape, a three-eighth-quote 201039790 angle shape, and the like, and may be arranged in a lattice shape, a wave shape, a staggered shape, or the like. In addition to the appearance, in order to achieve the decorative effect, it can also be a character or a pattern that can be recognized from the outside. The lower sheet 12 is formed by crepe paper which is used for absorbing and retaining blood oozing from the food material and processed by wet crepe processing. For the raw material of the crepe paper forming the lower sheet 12, a general pulp fiber raw material can be used, and in addition to the wood fiber of the broad-leaved tree and the conifer, plant fibers other than wood or synthetic fibers can be combined. However, it is preferable to use the pulp fiber of the coniferous tree from the viewpoint of the tensile strength of the crepe paper. Further, in order to enhance the absorption performance of the crepe paper, it is preferable to carry out the hydrophilization enhancement treatment. The lower sheet 12 is thinner than the upper sheet 11 and has a high density, and since it is formed of crepe paper having excellent water absorbability, the blood water oozing out from the food material can be instantaneously directed from the upper sheet 1 1 by capillary action. Ο The lower sheet 12 moves. The crepe paper forming the lower layer sheet 12 is formed by a wet crepe processing to form a plurality of crease lines (wrinkles) extending in a direction (CD direction) perpendicular to the machine direction (MD direction) at the time of manufacture. 5. As the lower sheet 12, since the other sheet member such as air laid non-woven fabric is used, since the soft crepe paper is used, the bending rigidity of the blood sheet 10 as a whole can be reduced, and when the whole food material is wrapped, Easy to bend and low recovery after bending. Further, the wrinkle 15 has a function as an absorption groove, and further enhances the diffusibility and water absorption of blood water, and -9 - 201039790 can suppress backflow of blood water after absorption (reverse osmosis and rewetting). Here, the term "wet wrinkle processing" means to perform crepe processing when the paper material is wetted during the production of crepe paper. The crepe paper forming the lower layer sheet 1 2 is not a dry crepe paper, but is preferably a wet crepe paper. From the viewpoint of absorbability and softness of the sheet for blood water, although dry crepe paper is generally preferred, after the use of dry crepe paper, the dimensional change after blood absorbing is large, when wrapping food It will cause the blood to curl with the sheet, and it is difficult to wrap the food. On the other hand, as long as it is a wet crepe paper and a dry crepe paper having the same basis weight and wrinkle ratio, it is preferable to use dry crepe from the viewpoint of absorbability and flexibility, but as described above. In the case of wrapping food, it causes curling after absorption, and therefore it is preferable to use wet crepe paper from the viewpoint of handling of the food. That is, when the dry crepe paper is used in the case of the lower sheet 12, after the blood water is absorbed, the wrinkles 15 are caused to extend toward the MD direction, so that the blood water is uniformly curled by the sheet 1 ,, but the wet is used. In the case of crepe paper, even if the blood water is absorbed by the lower sheet 12, the 'wrinkles 1 5 does not extend in the direction of the MD'. Since the product size does not change before and after the blood water absorption, the blood water sheet 1 does not There are situations where it is easy to curl. Therefore, 'the lower layer 12 absorbs the blood water oozing from the foodstuff', and the blood-water sheet 1 〇 ' can maintain the state shape after the coating is wrapped. On the other hand, in the case of using dry crepe paper, since the shape regaining property is high when the blood is absorbed in the state of being bent, it is impossible to maintain the state of the food wrapped with the ingredients - and the blood is leaked to the outside. After that. Further, in the manufacturing procedure, since the moisture content is high in the wet crepe processing, when the lower sheet 12 is cut in the manufacturing process, the fiber or the pulp of the cut end face is powdered but There will be no flying out of the outside. On the other hand, in the case of the dry wrinkle processing, since the fibers or the pulp of the cut end face are powdered and dissipated to the outside, it is necessary to remove the material and perform the inspection, inspection, and the like of the cutting process in the manufacturing process. The lower sheet 12 preferably has a crepe ratio of 10% to 30% in order to have appropriate water absorbability and flexibility. In the case of less than 10%, the flexibility is low and it is difficult to bend, and it is difficult to handle when wrapping the ingredients, and in the case of more than 30%, it becomes excessively bulky and difficult to handle, and the lower sheet 1 2 The strength is lowered, and the liquid retention property cannot be fully exerted. The intermediate layer 13, which is used to bond the upper sheet 11 and the lower sheet 12, is used at a mass ratio of 1 g/m2 to 5 g/m2. The hot-melt adhesive can be applied intermittently in various coating processing patterns such as a spiral shape or a dot shape, but in order not to hinder the air permeability of the opening 14 of the upper sheet 11, A coating process which is narrower than the aperture size of the opening 14 is preferable for coating processing. Further, in the present invention, the upper sheet 11 and the lower sheet 12 are joined by a hot-melt adhesive, but they may be joined by various heat-fusible means such as heat sealing or ultrasonic sealing. Fig. 3 is a partial enlarged view of Fig. 2. The opening 14 has a tubular portion 16 extending from the peripheral edge 14 a of the opening 14 toward the thickness direction of the upper sheet 1 1 . The tubular portion 16' has an upper end opening diameter D1 composed of a peripheral edge 14a of the opening -11 - 201039790, and a lower end opening diameter D2 opposed to the lower sheet 12. The tubular portion 16 has a hole diameter which is reduced toward the lower side and has a funnel shape, and the upper end opening diameter D1 is larger than the lower end opening diameter D2. As described above, when the tubular portion 16 is reduced in diameter toward the lower side, the closer the capillary phenomenon is to the lower sheet 12, the more the blood water entering the opening 14 can be moved toward the lower sheet 12. Further, the tubular portion 16 has a reduced diameter as it goes downward, and since the upper sheet u is thicker than the lower sheet 12, even if the food material is placed on the upper surface 10A of the upper sheet 11, the blood water sheet 1 is entirely received. At the time of pressurization, it is also possible to suppress the blood water absorbed by the lower sheet 12 from being oozing back in the direction of the upper sheet 1 1 . In order to achieve the above effects, specifically, the upper end opening diameter D1 is 0.5 mm to 2.0 mm, and the lower end opening diameter D2 is preferably 0.1 mm to 1.5 mm. Further, although not shown, the upper and lower end opening diameters D1 and D2 may be the same size. <Second Embodiment> Fig. 4 is a plan view showing a blood water sheet 10 similar to that of Fig. 1 and Fig. 5 is a cross-sectional view taken along line VV of Fig. 4; . Since the basic configuration of the blood-water sheet 10 in the present embodiment is the same as that of the first embodiment, only the differences will be described below. In the present embodiment, a plurality of slits 17 (conducting portions) arranged in a wrong shape are formed in the upper sheet 1 1 instead of the openings -12-201039790 of the first embodiment. Since the slit 17 extends in the thickness direction of the upper sheet 11 and penetrates the upper sheet 11, the blood water oozing from the food placed on the upper surface of the upper sheet 11 on the 10 A side passes through the slit. 1 7 and quickly moved to the lower sheet 1 2, which was absorbed and held by the lower sheet. Further, in the same manner as the opening 14 of the first embodiment, the slit 17 is formed so as to be narrower in width as it goes downward, and therefore has the same effect as the opening 14 . Further, although not shown, in order to increase the suction speed of blood water, the slit 17 may be formed in the upper sheet 11 having a plurality of openings 14 . Fig. 6 is a view showing a part of a process for producing a wet crepe paper forming the lower sheet 12. The end of the sheet-like crepe base paper 20 formed by the forming process is wound and fixed by a take-up roll (not shown), and the other end side is conveyed along the lower side felt facing the machine direction. (felt) 2 1 is continuously conveyed, and is dried by flattening between the upper roller 22 and the first lower roller 23 which are rotated in opposite directions. After dehydration, the wrinkle base paper 20 in a wet state is pressure-bonded to the surface of the upper roll 22, and abuts against the scraper 24 on the upper surface thereof, and is placed in the upper position by pulling it off. The upper felt 25 is conveyed, and a regular wrinkle pattern is applied to the wrinkle base paper 20. The wrinkle ratio of the wrinkle base paper 20 can be determined by the difference between the peripheral speed of the side felt 2 1 and the peripheral speed of the upper felt 25 in the flattening process which is the lowering speed of the upper and lower rolls 22, 23. The wrinkle base paper 20 conveyed along the upper felt 25 is passed between the cylindrical dryer 26 and the second lower roller 27-13-201039790 while being blown with hot air, and is completely dried, and then Rolling. Since the wet crepe paper formed by such a manufacturing process is wrinkled and then dried in a wet state, the crease of the crepe 15 becomes less likely to stretch than the dry crepe paper. In our opinion, this is because, in the case of wet wrinkle processing, the hydrogen bonding in the wrinkles 15 becomes stronger than in the dry crepe processing. The wrinkled base paper 20 (lower layer sheet 1 2) after winding is wound up by applying a pulling tension applied in the MD direction, and the lower layer sheet 12 is a hot-melt adhesive agent interposed to form the intermediate layer 13 and forms an upper sheet. 11 thermoplastic plastic film joints. As described above, at the time of joining, the lower sheet 12 is applied with a pulling tension applied in the MD direction when it is unwound, but since the crease is not easily stretched by the wet wrinkle processing, the wrinkles 15 There will be no loosening. Therefore, after the upper and lower sheets 1 1 and 12 are joined to form the blood-water sheet 10, the reticular recovery force acts, that is, the force to return to the state after the original wrinkle processing is applied, so that the blood-water sheet as a whole does not There are doubts about curling. On the other hand, in the case where the wrinkle base paper 20 is formed by dry wrinkle processing, the wrinkles are entirely extended by the tension applied in the MD direction when it is unwound. Therefore, the lower sheet 12' is directly joined to the upper sheet bundle while maintaining the state in which the wrinkles 15 are extended. Therefore, after the two sheets 11, 12 are joined, the lower sheet 12' wrinkles 15 are returned to the original state. The strength of the blood's thin film 1 〇 is easy to curl even if it is in a dry state. -14- 201039790 The variety of the embossed wet type of the wet type is the same as that of the first product, and the price of the paper is screaming or special. ο ο [迤纸] 0 m ηη <〇to o CO (D cs lO r> CN s CD 〇in ir? s oi Γ- ΓΟ CM \n r> O (D <〇5 d ο m 5 ο s 〇d η s ίο Oi d ο s ^τ d r- d X d Oi B 5 s in in 〇Ο CNt 0 © CO no 〇kO CO o' 〇to CO d 〇g 〇> ci ci CM r> O op in no ο ο \n (O oo i. in ds ri to s <〇CO 6 os C>JX CO 00 CN< o 〇>σ> § Ο) m ta to X ΙΟ cni 〇Θ愆±3 <〇卜S os (no' so in ri (O <〇o' 0 01 C5 cn p \η Ο ο in od CM (O σ> «Μ dosooso 〇in 3 d 〇K 〇· 8 CM ι〇(6 σ> to κ Ο Ο X @ m 提 CD gsoods U7 σ> ds 00 oo o V ci C>J rs ooodm U1) ο ο in to O d 吋ύ odosda (〇〇> In CO o 0 m S ds esj £ CM ιη Ο) <〇s 〇0 m grip boat inch, π' og Ο Ί dsm to o CO 5 o 令 r gt CM cn 艺 oo ΙΑ ο ο tn (O od ο to CM 09 d S o' <〇o' 00 (n CO C4 d 〇00 00 d 5 Λ ιη CSJ ίο CD 2 〇00 (C> 〇@ 匡m (Ο芝 d iO 〇> cn m σ s § o r> oo ci 〇oo oo ιτ> ιη ο ο m to oo CM <〇ds ό d S § o 〇r·» s 〇a> at in (Ο σ> (〇ΐο Ο Oi o © m pole cq u> o CM to osos to CO d , ri <s r> CO O p ιτ> ο m loo 9 (O o 2 od S o tn ΙΛ d 〇so O) 1/) 卜r- § η «ο 〇CO ai CN CN in ossoo CM s 00 00 d C5 eg Ci cn O od ιη ιη ο ο in CO o ό CO per CM d S o in o rj s CM 〇Ο r>- sor* C5 r- ao in 〇r? V? o Θ m series (O o iO P- to oo to CM £ σ> CO d H CM n <n 〇oo (η ο ο in (O oc» CSl OJ § d ao ΟΪ in 〇<〇00 CM d 〇σ) SOO 卜卜〇 (Ο in 〇(O ci 〇'ω msm MQSQ CJ 摩Γ Η - 'ω 明 sk 1 ios .枳GU 增I feS 赃•i: •ft Q •ft Q 〇轻ίΓ Η- rrfJ 坻i 滟回"m 啊§s 'bb Ε Η Η - s-/ 踯3 now H- § -Μ rrSL 坻 w w s: 薛 m BiZ sm υί i ir (Λ LJ i «Γ CO UJ knot m self-mixed • H dC ts H- m m » Containing $ 租租杂杂 m 雄 m 狴i -15- 201039790 [Measurement method] <Thickness of sheet> According to the specifications of JISL1096.6.5, use table thickness meter (MITUTOYO The company system, measuring surface φ 50.5 mm, measuring pressure 3 g/cm 2 ) was measured. First, a sample of 100 mm X 1 0 0 mm was cut from each sheet, and the disk located at the upper and lower positions was quietly sandwiched into the center of the sample, and the number of the measuring device at this time was obtained (N = 1 0 ). < KES (bending) 値> A sample of 100 mm x 100 mm was cut out from each sheet, and the sample was aligned and placed on a guide wire of a measuring stand of an automated pure bending tester (Kato Tech Co., Ltd.), and fixed. Measurements were taken at the center of the chuck. The CD direction was measured 5 times in the MD direction. <Water absorption amount and water retention amount> A sample of 140 mm x 60 mm was cut out from each sheet, and the mass (Ag) of each sample was measured. After measuring the weight, the sample was placed on a metal mesh of 10 mesh, and then the whole sample was immersed in a test solution (tap water, physiological saline, edible oil) injected into the tray. After soaking for 3 minutes in the test solution, the sample was taken from the tray containing the entire metal mesh, drained slightly, and allowed to stand for 5 minutes. Then, the mass (B g ) of the metal mesh and the sample is measured and the sample is removed, and only the mass (Cg) of the metal mesh is measured. The sample was then placed on top of the sample stage and a 42 Og weight was placed on the sample' so placed for 3 minutes. After 3 minutes, the mass (Dg) of the sample was measured. -16-201039790 Using the 値(A to D) obtained by the above-described measurement method, the water absorption amount and the water retention amount were obtained by the following calculation method. The measurement was carried out 3 times, and the average enthalpy was used as the water absorption amount and the water retention amount of each sheet. Water absorption (g/m2) = (BCA) /0.06/0.14 Water retention capacity (g/m2) = (DA) /0.06/0.14 <Diffraction> 〇 A sample of 65 mm x 00 mm was cut from each sheet and set in automatic injection. machine. The physiological saline was dropped from the upper position of the sample 10 mm toward the center of the sample at 1.0 ml/3 sec. After 3 minutes from the dropping, the diffusion width (mm) (N = 5) of the upper surface of the sheet for blood water, the upper surface of the lower sheet, and the lower surface of the lower sheet was measured. <Freshness retention judgment> As a freshness retention test, the K値 measurement method was performed using a freshness tester (manufactured by QS-O SOLUTION Co., Ltd.). K値, an indicator of freshness, is the degree to which ATP is decomposed to produce the accumulation of inosine and hypoxanthine. Specifically, the cut of the raw salmon is placed in the sample. For the sheet, the freshness (K値) of the cuts after storage for 1 day and 2 days in a refrigerator set at 4 ° C was obtained. <Evaluation method of freshness retention> As a result of the above test, when the rewet moisture of the lower sheet is 2.0 g or less, the freshness (K値) deteriorates after 1 to 2 days. -17-201039790 When the re-wetting of the lower sheet is 2.0 g or less, it is good (〇), and when it is 2.0 g or more, it is bad (X). <Elongation at Wetness> A sample of 150 mm x 25 mm was cut out from each sheet, and an oily pen was marked from 2 mm from both end edges of the sample, and then the whole sample was immersed in tap water injected into the tray. After immersing in tap water for 1 minute, the sample was taken out from the tray, and the interval size (size E) of the mark (N = 3) was measured, and the elongation at break (%) was obtained by the following calculation. Elongation at wetting = (E - 1 0 0 ) / 1 0 0 X 1 〇 0. <Curling judgment> The ratio of the curl when the sheet for blood water was pulled by the stress of 〇.lN/25 mm was obtained. <Evaluation Method of Curl> The ratio of the curl of each of the blood water sheets 10 is determined by the above method, and it is understood that when the wet sheet elongation of each of the lower sheet 1 2 of the blood water sheet 1 is less than 10%, It is difficult to curl, and when it is 10% or more, it is easy to curl. Therefore, when the elongation at the time of wetting of the lower layer sheet 1 2 is 10% or less, it is regarded as a good (X) when it is good (〇) or more than 10%. <Example 1> As the upper sheet 11, an open-pore plastic film made of LDPE (Low Density Polyethylene) -18-201039790 was used, and as the lower sheet 12, NBKP (coniferous kraft paper bleached pulp) was used as a raw material. A wet crepe paper having a mass of 4 8 g/m 2 and a wrinkle rate of 10% was produced. <Example 2 > 'The same upper layer sheet 11 as in Example 1 was used, and as the lower layer sheet 12, NBKP was used as a raw material to prepare a wet crepe paper having a mass of 48 g/m 2 and a wrinkle ratio of % 20%. . <Example 3> The same upper sheet 11 as in Example 1 was used, and as the lower sheet 12, wet crepe paper having a mass of 48 g/m 2 and a wrinkle ratio of 30% was produced by using NBKP as a raw material. <Example 4> Ο The same upper sheet 11 as in Example 1 was used, and as the lower sheet I2, NBKP was used as a raw material to prepare a wet/dry crepe paper having a mass of 48 g/m 2 and a wrinkle ratio of 20%. use. <Example 5> The same upper sheet 11 as in the Example was used, and the lower sheet 12 was made of NBKP as a raw material to obtain a wet crepe paper having a mass of 25 g/m 2 and a crepe ratio of 20%. -19-201039790 <Example 6> The same upper layer sheet 1 as in Example 1 was used as the lower layer sheet 12, and NBKP was used as a raw material to prepare a wet type having a mass of 25 g/m 2 and a wrinkle rate of 2% by weight. Use crepe paper for use. <Comparative Example 1 > The same upper layer sheet 11 as in Example 1 was used, and as the lower layer sheet 12, dry crepe paper having a mass of 48 g/m 2 and a wrinkle ratio of 20% was produced by using ruthenium as a raw material. <Comparative Example 2 > The same upper layer sheet 11 as in Example 1 was used, and as the lower layer sheet 12, NBKP was used as a raw material, and a wet paper having a mass of 48 g/m2 without crepe processing was used. <Comparative Example 3 > As the upper sheet 11, an open-pore plastic film made of HDPE (High Density Polyethylene) was used, and as the lower sheet, the synthetic fiber was mixed with NBKP to obtain a mass of 48 g/m2. Air laid non-woven fabric for use. <Evaluation> As shown in the results of the first table, in Examples 1 to 6, the wrinkle ratio was 1 Å as long as the mass of the lower sheet 12 was 25 g/m2 to 48 g/m2. /. ~ -20- 201039790 3 0%, the judgment results of curl ease, freshness retention, and curl are good (〇). Further, from the results of the determination of Example 4, it is understood that the same determination result as that of the wet crepe paper can be obtained even in the case of wet dry crepe paper. In Comparative Example 1, although the result of the curling is easy and the freshness is maintained, the result of the determination is good (〇), but in the case of dry and wet paper, the wrinkles of the lower sheet 12 are extended in the MD direction in a wet state. It is easy to curl up, so the result of the curl is bad (X). Further, in Comparative Examples 2 and 3, since the wet paper or the air-laid nonwoven fabric which is not subjected to crepe processing is used for the lower sheet 12, the whole of the blood-water sheet has a relatively high rigidity, and the curling ease is poor. Brief Description of the Drawings Fig. 1 is a partially broken plan view showing a sheet for blood water in the first embodiment. Fig. 2 is a cross-sectional view of the Π-Π line of Fig. 1. A partially enlarged view of Fig. 3 and Fig. 2. Fig. 4 is a partially broken plan view showing the blood-water sheet in the second embodiment. Fig. 5 is a cross-sectional view taken along line V-V of Fig. 4. Fig. 6 is a view showing a part of a manufacturing process of wet crepe paper. [Description of main component symbols] -21 - 201039790 1 〇: Sheet for blood water 1 0 A : Upper surface 1 0B : Lower surface 1 1 : Upper sheet 12 : Lower sheet 14 : Opening (conveying portion) 1 5 : Wrinkles ( Wrinkle line) 1 6 · 'Tubular part 17 : slit MD : mechanical direction CD: direction perpendicular to MD - 22 -