TWI405660B - 具有錐狀點接合的彈性薄膜層合物 - Google Patents

具有錐狀點接合的彈性薄膜層合物 Download PDF

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Publication number
TWI405660B
TWI405660B TW098145006A TW98145006A TWI405660B TW I405660 B TWI405660 B TW I405660B TW 098145006 A TW098145006 A TW 098145006A TW 98145006 A TW98145006 A TW 98145006A TW I405660 B TWI405660 B TW I405660B
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Taiwan
Prior art keywords
laminate
film
laminates
elastic
elastic film
Prior art date
Application number
TW098145006A
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English (en)
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TW201034843A (en
Inventor
Eric Frost
Original Assignee
Tredegar Film Prod Corp
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Publication of TW201034843A publication Critical patent/TW201034843A/zh
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    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
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    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
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    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
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    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
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    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
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Description

具有錐狀點接合的彈性薄膜層合物 發明領域
本揭示內容係有關於彈性薄膜層合物、製造此等層合物之方法、及合併彼等之物件。
 發明背景
彈性薄膜層合物可用以製造許多物品。更詳細地，彈性薄膜層合物可用以製造吸收性物件，諸如尿布、訓練褲成人失禁物件、及類似物件。該等彈性薄膜層合物可作為，例如腰帶、褲腳摺邊、側襻(side tabs)、側耳狀物(side ears)、側冀(side panels)或作為該物件之罩。彈性薄膜層合物亦可用於其它物件，諸如服裝、帽子、長袍、工作服等，且典型上可用以使該物件得到所欲合適特性。
當薄膜或層合物係以輥筒形式製成時，則該材料可沿著通稱為機器方向(“MD”)起點之路徑移動，其中該材料成形或退捲至成品織物已捲繞在輥筒上的程度。該機器方向通常相當於織物之最長尺寸。橫向(“CD”)為通常與機器方向垂直之方向且典型上相當於織物之寬度。雖然已推薦許多彈性薄膜及層合物，但是大多數此等薄膜及層合物經設計並製造以提供呈橫向(“CD”)之拉伸。
對於具有改良柔軟性及手感且不會犧牲強度或接合品質之層合物仍有需求。
 發明概要
在一實施例中，該等彈性層合物包含一以超音波性接合至兩非織造織物之彈性薄膜，一種此非織造織物係位於該彈性薄膜之任一側上，其中該層合物具有不超過約20%之平域接合區。
在另一實施例中，該等彈性層合物包含一以點接合至兩非織造織物之彈性薄膜，一種此非織造織物係位於該彈性薄膜之任一側上，其中該層合物具有不超過總點接合面積之30%的平域接合區。
在另一實施例中，該彈性層合物包含第一非織造織物、第二非織造織物、一位於該第一與第二非織造織物間之彈性薄膜、及數個使該第一與第二非織造織物牢固於彈性薄膜上之超音波接合點，在接合區內，該超音波接合點不含任何凸出物。
一旦進一步閱讀本專利說明書並參考附圖及附加申請專利範圍，即可瞭解本揭示內容之這些及其它方面。
圖式簡單說明
第1圖為先前技藝層合物之橫截面圖，其特別闡明一超音波接合點。
第2圖為先前技藝層合物之平面圖，其特別闡明一超音波接合點。
第3圖為根據本揭示內容之彈性層合物的橫截面圖且其特別闡明該等超音波接合點。
第4圖為表示當以機器方向拉伸時，該等新穎層合物與先前技藝層合物間之尖峰拉伸比較的曲線圖。
與第4圖類似，第5圖為表示當以橫向或橫切向拉伸時，該等新穎層合物與先前技藝層合物間之尖峰拉伸比較的曲線圖。
第6圖為本揭示內容之實例段落中所述之新穎層合物與先前技藝層合物於模向之100%伸長率下的一系列應力應變曲線。
 較佳實施例之詳細說明
習知層合物係藉許多不同層合方法中之任一種而製成，這些法包括熱層合法、黏著層合法、真空層合法、擠壓塗覆法、超音波接合法、及其等之組合、以及本項技藝已知之其它方法。超音波接合法亦稱為“點接合法”，其中該層合物之各層係於分開的有間隔之位置或“點”經連接在一起。
超音波接合為非接觸接合法，其中係使未接合之層合物層通過超音波喇叭與圖案化砧之間。該砧可以是扁平的似片狀構件或柱形輥筒且具有一系列凸起的元件圖案位於其上。該凸出物之橫截面形狀可以呈扁平狀或圖形。該超音波喇叭係於高頻率下振動以產生聲波。當未接合織物在該喇叭下通過時，聲波可產生熱及壓力，因此可將該等織物一起熔融。因此該等接合點可在喇叭與砧輥筒之突起部件之間所形成的空隙內形成。
首先參考第1圖，其中係闡明先前技藝經超音波接合之彈性層合物的橫截面。該層合物10具有第一非織造織物12、第二非織造織物14、及位於該第一與第二非織造織物12、14之間的彈性薄膜16。該層合物之各層合物係藉數個超音波接合點18而一起接合。
該等先前技藝層合物之接合點18係使用如第1圖所示之具有數個實質上扁平上段22之尖端的砧輥筒所製成。如第2圖所示，當自該層合物之上面(或下面)觀看時，該等接合點18通常呈圖形。如第1圖所示，在該砧輥筒(圖中未顯示)上之扁平上尖端20可形成具有佔各該接合點18之實質上所有接合區25。更明確地，先前技藝之累積接合面積為該層合物總面積之約7.0-7.3%且該接合區之大於90%為平域區(flat land area)。不同地敘述，該總接合區之約6.3-6.6%包含平域區。
扁平上尖端20之使用亦可自欲送至該接合區之邊緣之薄膜16及/或非織物層12、14形成熔態聚合物材料。當該聚合物材料冷却時，其可在該接合點內形成凸出物。在大多數情況下，該凸出物呈在接合點周圍之圓周的脊狀突起或凸緣26的形式。然而，應該瞭解當聚合物被推向接合之外緣時，該凸出物可呈任何形式。一般而言，該凸出物為具有比薄膜之標稱厚度還大之厚度的任何缺陷。
該扁平上尖端20亦可在非織造層12、14及接合點18之間形成相當陡峭的過渡區28。該過渡區28可在非織造織物12、14與接合點18的表面之間產生陡峭的側部件。這3種特性：大平域區24、圓周的脊狀突起及陡峭的轉變區28可配合以產生一當經消費者或使用者輕撫時具有顯著的勁度或粗糙性的層合物。更明確地，一旦輕撫該層合物時，觸覺為一旦越過一接合點時，消費者可注意到一顯著的隆起的感覺，該消費者將這種感覺視為粗糙或硬質的感覺。由於該等層合物通常係用於皮膚接觸之應用。諸如套穿型尿布之側冀，粗糙性或剛性或勁度的感知為不利的性質。
申請者已發現藉減少該接合點內之平域區，所形成之層合物之柔軟性及觸感優於具有較大平域區之層合物。
特別參考第3圖，新穎層合物110包含具有藉數個超音波接合點118而接合在薄膜116之任一側上的非織造層112、114之彈性薄膜116。層合物110之接合點118係使用具有數個圓形尖端120之砧輥筒(圖中未顯示)製成。該等圓形尖端122具有一平域區122，與使用平截錐形尖端20所製成之先前技藝層合物比較，該平域區122在總接合區125內之佔有百分率低很多。更詳細地，雖然第3圖之層合物亦具有約7.0-7.3%之總接合區，與先前技藝之6.3-6.5%比較，該平域區僅佔總接合區之約1.9-2.2%。
如第3圖中所示，除較少的平域接合區外，在該等新穎層合物內，接合點124與非織造層112、114間之過渡區128較不陡峭。此外，接合點124缺乏先前技藝層合物內所見之脊狀物或圓周的凸緣26。因此，與第1及2圖之先前技藝層合物比較，該等新穎層合物可提供大改良之柔軟性及觸感。
用於該等新穎層合物之彈性薄膜116可以是單層薄膜或多層薄膜。該名詞“彈性”係用以意指以至少一方向拉伸至其原有尺寸之約150%，且當釋放拉力時，會返回不大於其原有尺寸之125%之大小。例如若一英寸長之材料可拉伸至1.5英寸長度且當釋放拉力並使該材料鬆弛時，其可返回至不超過1.25英寸長度，則其具彈性。
若使用多層，較佳以共擠製法製成彈性薄膜116，其中彈性核心及一或多表層係同時自模具擠製。或者，可使用擠壓塗覆法以製造多層彈性薄膜12。該薄膜116較佳包括含一彈性核心層及至少一在該核心層之任一側上的皮膚之共擠製多層薄膜。應瞭解亦涵蓋具有不止一皮膚在彈性核心之各側上的實施例且可有利地使用。
該彈性核心包含天然或合成橡膠，諸如異戊二烯、丁二烯-苯乙烯材料、苯乙烯嵌段共聚物(例如苯乙烯/異戊二烯/苯乙烯(SIS)、苯乙烯/丁二烯/苯乙烯(SBS)或苯乙烯/乙烯-丁二烯/苯乙烯(SEBS)嵌段共聚物)烯系彈性體、聚醚酯、聚胺甲酸乙酯、及其等之混合物。該等皮層，若使用時可包含彈性低於該彈性核心之任何合適材料。較佳材料為聚烯烴聚合物，特別為聚乙烯聚合物及共聚物，其包括經金屬茂催化之聚乙烯、及聚乙烯聚合物或共聚物之摻合物。若必要，亦可有利地使用其它材料，諸如乙酸乙烯酯共聚物。
該名詞“聚合物”包括均聚物、共聚物，諸如嵌段、接枝、無規及交替共聚物、三元共聚物等、及其等之摻合物與改質物。而且，除非另有明確限制，該名詞“聚合物”有意包括該材料之所有可能立體化學構形，諸如等規、間列及無規構形。
在多層彈性薄膜內，該等皮層對核心層之相對厚度可根據特定應用及所欲性質而不同。適於多層彈性薄膜之較佳實施例之皮層/核心/皮層之重量比範圍為自5/90/5至15/70/15。可使用如本項技藝已知之凹凸滾輪進行彈性薄膜116之壓紋或可使用，例如真空箱使該彈性薄膜116具平滑表面。在製程期間，該真空箱可以使彈性薄膜116得到部份真空，將該薄膜拉至鑄造輥筒，因此產生更平滑且其規格通常比未使用真空箱所製成之薄膜還薄之薄膜。
如本項技藝所知，非織造織物為包含以無規或非重複圖案排列之聚合物纖維的纖維狀織物。就大多數非織造纖維而言，係藉以下各種方法之任一或多重：諸如紡黏法、熔噴法、黏合梳理織物法、水纏結法等；及/或藉於一纖維接觸另一纖維或穿過本身之位置使纖維一起接合而使該等纖維形成黏合織物。用以製造該等織物之織物可以是如本項技藝已知之單一組份或雙組份纖維且進一步可以是連續或人造短纖維。不同纖維之混合物亦可用於該等纖維狀非織造織物。
可自任何形成纖維之熱塑性聚合，其包括聚烯烴、聚醯胺、聚酯、聚氯乙烯、聚乙烯乙酸酯及其等之共聚物與摻合物；以及熱塑性彈性體製成該等非織造織物。特定聚烯烴、聚醯胺、聚酯、聚氯乙烯、及其等之共聚物與摻合物係連同適於該薄膜層之聚合物闡明於上文。用於該纖維狀層之合適熱塑性彈性體包括三-及四-嵌段苯乙烯系嵌段共聚物、聚醯胺及以聚酯為主之彈性體等。
可自各種熱塑性聚合物，其包括聚烯烴，諸如聚乙烯及聚丙烯；聚酯；共聚物；聚乙烯乙酸酯；聚醯胺；共聚醯胺；聚苯乙烯；聚胺甲酸乙酯及上述任一種之共聚物(諸如氯乙烯/乙酸乙烯酯)等製成該等熱塑性纖維。合適的熱塑性纖維可自單一聚合物製成(單組份纖維)或可自不止一種聚合物製成(例如雙組份纖維)。例如“雙組份纖維”可指包含自一不同聚合物製成之熱塑性鞘內所包含的聚合物製成之芯纖維的熱塑性纖維。該含鞘之聚合物的熔化溫度典型上與含該芯之聚合物不同且較低。因此，由於該鞘聚合物之熔化，所以這些雙組份纖維可得到熱接合性，且可保有該芯聚合物之所欲強度性質。
雙組份纖維包括具有以下聚合物組合之鞘/芯纖維：聚乙烯/聚丙烯、聚乙基乙烯乙酸酯/聚丙烯、聚乙烯/聚酯、聚丙烯/聚酯、共聚酯/聚酯等。該等雙組份纖維可以是同心或偏心型纖維，其係指該雙組份纖維之整個橫截面積，不管該鞘是否具有平坦或不平坦的厚度。就於較低纖維厚度下提供更強之抗壓強度而言，偏心型雙組份纖維較佳。
就用於梳理非織造織物之熱塑性纖維而言，其等之長度可取決於這些纖維之特定熔點及所欲之其它性質。典型上，這些熱塑性纖維具有自約0.3至約7.5厘米、較佳自約0.4至約3.0厘米之長度。亦可藉改變該等纖維之直徑(口徑)而調整這些熱塑性纖維之性質，其包括熔點。這些熱塑性纖維之直徑典型上係根據其等之旦(denier)(每9000米之克數)或分特(decitex)(每10,000米之克數)而定義。根據該結構內之特定排列，合適的熱塑性纖維可具有在自遠低於1分特(諸如0.4分特)至高至約20分特範圍內之分特。
名詞“熔噴纖維”係指藉以下步驟而形成之纖維：在可以使熔態熱塑性材料之長絲變細以降低其等之直徑(其可達微纖維直徑)的高速氣體(例如空氣)流內經由數個組、通常為圓形之模毛細管擠壓呈熔態絲或長絲之熔態熱塑性材料。該名詞“微纖維”係指具有不大於約100微米之平均直徑的小直徑纖維。其後，該等熔態纖維係藉該高速氣流而搬運並沈積在一收集表面上以形成無規分散的熔噴纖維之織物。
該名詞“紡黏纖維”係指藉以下步驟而形成之小直徑纖維：自數個細、通常為圓形的具有經擠壓長絲之長絲之噴絲頭的毛細管擠壓呈長絲之熔態熱塑性材料。然後，例如藉排出拉伸法或其它已為吾人所熟知的紡黏技術而快速地降低其等之直徑。
更特佳之非織造織物為根據US RE 35,206中所述之方法而製成之熱硬化織物，該US RE 35,206之揭示內容在此併入本案以為參考資料。在此方法內，係使非織造織物接受熱及拉力以重新排列並定向該呈拉伸方向之織物。
若必要，可藉本項技藝已知之任何方法而製成透氣性新穎層合物。產生透氣性之方法包括打孔、開縫及其它技術，諸如熱針打孔、模內、劃線、剪切、真空穿孔、或經由高壓水噴射之使用。
亦可使用此等方法之組合。由於該等非織造織物通常具透氣性，所以較佳可在層合前，簡單地使該薄膜穿孔。經穿孔之薄膜在本項技藝中係已知且可藉機械打孔或真空穿孔或用於產生透氣性或空氣可滲透薄膜之任何其它已知方法而製成。
在某些實施例中，該薄膜可含有已分散在聚合物基質內之微粒狀填料。該薄膜形成後，拉伸該薄膜可將聚合物基質自該等微粒拉開，在該薄膜內產生微空隙，其藉維持該薄膜之液體不可滲透性而可傳送水蒸汽。藉此等方法而製成之微多孔透氣性薄膜在本項技藝已為吾人所熟知。
可拉伸或活化彈性薄膜116、非織造織物112、114或成品層合物以改良該等層合物之彈性特性。例如雖然該薄膜及/或該等非織造物可以由彈性體樹脂製成，但是該薄膜之皮層(若存在)及/或已連接至該薄膜之非織造織物有抗拉伸之傾向。因此，除非經活化，就特定應用而言，拉伸該等層合物所需之力可被視為太過度。因此，如本項技藝所習知，在將這些織物一起超音波接合以形成層合物110前，可較佳拉伸或活化薄膜116或非織造物112、114或兩者。或者，或此外，在該等織物經超音波接合在一起後，可較佳拉伸或活化該層合物。
可藉本項技藝已知之任何方法而進行拉伸或活化，這些方法包括，諸如但不限於：(1)經由使用兩隔開之滾輪對以機器方向拉伸該織物，其中下游之滾輪對係以比上游滾輪對還快之旋轉速度操作；(2)經由使用拉幅器框以橫向拉伸該織物；(3)或互嚙合齒輪(“IMG”)活化作用。亦可使用這些方法之組合。
IMG為其中織物係通過具有數個在約該等滾輪之周圍定向之齒的滾輪尖端之方法。當該等滾輪集合在一起時，該等齒互嚙合。該織物被齒輪之齒夾牢並導致在一對鄰接齒間之區域拉伸。根據拉伸後，該織物之伸長的所欲定向，該等齒可沿著機器方向、橫向或於其間之任何角度定向。IMG活化作用為彈性層合物技藝中已為吾人所熟知的方法。
用以製造新穎層合物之任何該等織物(其，如文中使用，包括該薄膜層)可經加工、處理、潤飾或使含有如本項技藝所習知之添加物。例如該等織物可包括著色劑、表面活化劑、助滑劑、抗靜電劑或若必要處理時之其它添加物。
可製造該等層合物110以產生所謂頸接合層合物、拉伸接合層合物、頸-拉伸接合層合物或零應變拉伸層合物。頸接合層合物之製法為施加拉力至該等非織造層之一或兩者並將該非織造物與薄膜接合在一起，且該非織造物呈頸狀狀態。拉伸接合層合物之製法為施加拉力至該薄膜並使該等非織造層合物之一或多層與薄膜接合，且該薄膜係在拉力下。頸-拉伸接合層合物之製法為將該薄膜與非織造物接合在一起，且兩者係維持在拉力下。零應變拉伸層合物之製法為將該等織物接合在一起，且該等織物皆不在任何可感知之拉力下。如本項技藝所知，除零應變拉伸層合物外，通常不需要活化作用，但是仍然可毫不在意地使用。
實例
實例1包含使用具有苯乙烯系嵌段共聚物之核心、及聚乙烯之皮層的共擠製彈性薄膜且基礎重量為54克/米2 所製成之層合物。該薄膜結構包含9/82/9重量比之皮層/核心/皮層。使該薄膜經超音波接合至兩雙組份紡黏非織造織物(Dayuan NDYTB-BM020)，該等非織造織物之一係位於薄膜之任一側上。各非織造織物具有20克/米2 之基礎重量。使用得自Standex Corporation之“雙點(double dot)”雕花鋼砧輥筒進行超音波接合。該層合物具有約7%之總接合區、及約2%之平域接合區。
實例2包含使用具有苯乙烯系嵌段共聚物之核心、及聚乙烯之皮層的共擠製彈性薄膜且基礎重量為40克/米2 所製成之層合物。該薄膜結構包含9/82/9重量比之皮層/核心/皮層。使該薄膜經超音波接合至兩紡黏非織造織物(Fiberweb Sofspan 120 NFPN 732D)，該等紡黏非織造織物之一係位於薄膜之任一側上。各非織造織物具有20克/米2 之基礎重量。使用得自Standex Corporation之“雙點”雕花鋼砧輥筒進行超音波接合。該層合物具有約7%之總接合區、及約2%之平域接合區。
比較該等層合物與兩市售層合物FabriFlexTM 309及FabriFlexTM 35102(Tredegar Film Products Corporation,Richmond,VA)。各該比較用層合物具有約7%之總接合區、及約7%之平域區。
參考第4及5圖，自該等資料可知新穎層合物之抗拉強度及彈性特性(亦即拉伸及回復性)皆優於先前技藝層合物。第4及5圖中之曲線圖的資料係藉使該等層合物進行ASTM 882中所詳述之試驗程序而產生。
藉使用恆定拉力將該等層合物捲繞在精輥筒上而比較該等層合物之捲筒壓縮性。亦使用類似ASTM D6571之程序以評估該等層合物之膨鬆性。在該膨鬆性評估中，係在低負載下藉手而將該等層合物拉伸至約80%伸長率。最後，使用已為吾人所熟知之試驗程序比較該等層合物之抗剪強度。
表1報告該等試驗程序之結果。如自表1可知，該等新穎層合物經證明具有優於先前技藝層合物之捲筒壓縮性及柔軟性。更明確地，該等新穎層合物經證明且有改良壓縮性，其可以使更多平方米之材料捲繞在輥筒上且不會增加該精輥筒直徑亦不會不利影響層合物性質或性能。其有利的原因在使用該等層合物製造最終產物時導致的變化較少且亦可降低裝運成本，且廢棄物少。此外，該等新穎層合物經證明在拉伸後具有增加的膨鬆性。膨鬆性與柔軟性間之相互關係(如自與輕撫感覺不同之壓縮性感覺所感知)在先前技藝(見，例如US 4,725,473;US 5,470,640；及US 5,288,348)中有詳細證明。因此藉消費者而感知之增加的膨鬆性可作為該等層合物之柔軟性的改良。最後，表1證明在不會犧牲接合強度下可獲得捲筒壓縮性及柔軟性/膨鬆性的改良。
10．．．層合物
12．．．第一非織造織物
14．．．第二非織造織物
16，116．．．彈性薄膜
18、124．．．接合點
20．．．尖端
22．．．扁平上段
24，122．．．平域區
25．．．接合區
26．．．凸緣
28，128．．．過渡區
110．．．新穎層合物
112，114．．．非織造層
118．．．超音波接合點
120．．．圓形尖端
125．．．總接合區
第1圖為先前技藝層合物之橫截面圖，其特別闡明一超音波接合點。
第2圖為先前技藝層合物之平面圖，其特別闡明一超音波接合點。
第3圖為根據本揭示內容之彈性層合物的橫截面圖且其特別闡明該等超音波接合點。
第4圖為表示當以機器方向拉伸時，該等新穎層合物與先前技藝層合物間之尖峰拉伸比較的曲線圖。
與第4圖類似，第5圖為表示當以橫向或橫切向拉伸時，該等新穎層合物與先前技藝層合物間之尖峰拉伸比較的曲線圖。
第6圖為本揭示內容之實例段落中所述之新穎層合物與先前技藝層合物於模向之100%伸長率下的一系列應力應變曲線。
112，114．．．非織造層
116．．．彈性薄膜
118．．．超音波接合點
120．．．圓形尖端
122．．．平域區
124．．．接合點
125．．．總接合區
128．．．過渡區

Claims (13)

  1. 一種具有彈性薄膜及以超音波接合至該薄膜之各側之非織造織物的層合物，該層合物包含不超過約2%平域(flat land)接合區，其中該平域接合區佔總接合區之小於約30%。
  2. 如申請專利範圍第1項之層合物，該層合物具有約7.0至7.3%總接合區。
  3. 如申請專利範圍第1項之層合物，其中各非織造織物係獨立選自紡黏、梳理及水針非織造織物。
  4. 如申請專利範圍第1項之層合物，其中至少一非織造織物為雙組份非織造織物。
  5. 如申請專利範圍第1項之層合物，其中該彈性薄膜為共擠製多層薄膜。
  6. 如申請專利範圍第5項之層合物，其中各彈性薄膜包含一苯乙烯嵌段共聚物。
  7. 如申請專利範圍第1項之層合物，其包含零應變拉伸層合物。
  8. 如申請專利範圍第1項之層合物，其中該層合物具透氣性。
  9. 如申請專利範圍第1項之層合物，其中該彈性薄膜係經活化。
  10. 一種方法，其包括：a.超音波接合一彈性薄膜之各側至一非織造織物；b.其中該超音波接合可產生不超過約2%的平域接合區，其中該平域接合區佔總接合區之小於約30%。
  11. 如申請專利範圍第10項之方法，其中該薄膜係在接合前被活化。
  12. 如申請專利範圍第10項之方法，其中該層合物係在接合後被活化。
  13. 如申請專利範圍第11-12項之任一項的方法，其中該接合步驟係發生於該薄膜及非織造織物皆在實質上零拉力下時。
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BRPI1000364A2 (pt) 2011-03-22
EP2223796A1 (en) 2010-09-01
JP2010195044A (ja) 2010-09-09
TW201034843A (en) 2010-10-01
CN101811383B (zh) 2014-10-22
US20100215923A1 (en) 2010-08-26
JP5351070B2 (ja) 2013-11-27
CN101811383A (zh) 2010-08-25
KR20100097009A (ko) 2010-09-02

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