TW200804077A - Elastic laminate and a method for producing an elastic laminate - Google Patents
Elastic laminate and a method for producing an elastic laminate Download PDFInfo
- Publication number
- TW200804077A TW200804077A TW96113800A TW96113800A TW200804077A TW 200804077 A TW200804077 A TW 200804077A TW 96113800 A TW96113800 A TW 96113800A TW 96113800 A TW96113800 A TW 96113800A TW 200804077 A TW200804077 A TW 200804077A
- Authority
- TW
- Taiwan
- Prior art keywords
- laminate
- elastic
- nonwoven web
- layer
- nonwoven
- Prior art date
Links
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Description
200804077 九、發明說明: 【明所屬貝^^ 3 發明領域 本發明有關一用以製造一包含至少三層的彈性積層材 5之方法。本發明亦有關一包含一第一非彈性非織造物網 膜、一第二非彈性非織造物網膜及一位於該第一及第二非 織造物網膜間的彈性穿孔膜之可彈性拉伸積層材。根據本 發明之彈性積層材特別適合用於諸如褲屎布、衛生褲、失 禁褲、及類似物等可棄式褲物件中。此等物件係包含一配 10置於一褲型底座中之吸收性單元且以一對底褲的方式作穿戴。 【先前技術】 發明背景 褲型吸收性物件係包括一褲型底座結構及一整合式吸 收性核心組件。構造褲物件時之目的係在於使其盡可能接 近地類似普通内裤。因此,諸如裤尿布、衛生裤及失禁裤 等吸收性物件係設計成可舒適且貼切地配合於穿戴者。想 要使物件能夠在臀部上被上下拉動以讓穿戴者或照護者容 易移除-弄髒物件且以一新的乾淨物件作取代。基於這些 理由,物件底座通常由一可彈性拉伸的材料製成,至少在 預疋方也加至牙戴者臀部上之區域如此。尚且,想要使圍繞 裤物件的吸收性部份之底座可滲透空氣及蒸氣,亦即令其 可呼吸。-可呼吸性物件係防止濕氣留存在穿戴者皮膚上 不可呼吸欧物件更為舒適且較不暖熱。如果物件為柔 _平i一且呈紡織物狀則亦為有利,故其不會磨刮穿戴者 5 200804077 皮膚且其盡可能接近地類似普通内褲。 並且,吸收性褲物件務必可在一穿戴者臀部上被拉上 …、斷4 種韦見問題係在於穿戴者或照護者試圖獲得 良好握持以將褲拉上或將褲移除時由於意外使手指經過材 5 料而使褲損壞。 褲物件之一先前使用的彈性材料係為一積層材,其包 3欺夾於兩層的非彈性非織造物之間的彈性膜。為了使 積層材成為可彈性拉伸,其接受—活化處理。—三層、經
活化積層材係揭露於國際專獅請案號鳥讀侧8。經 1〇活化積層材係由增量拉伸兩非彈性布狀層之間的一彈性膜 層來製造。藉由使積層材穿過互屬齒輪滾子之間來進行增 量拉伸。藉由增量拉伸之彈性積層材的活化亦揭露於美國 專利案號 5,143,679、5,156,793、5,167,897、5,422,172、 15 5,592,_、5,634,216、及5风斷。非彈性布狀層在活 化製程齡 1係完全或部分地破裂或·使得活化後之積層 材的彈性主要由彈性膜層的彈性所控管1⑽胸侧的 三層積層材中,非彈性層係完全地破裂故經活化積層材的 彈性與彈性膜層的彈性實質地相同。 所揭露積層材具有優良的舒適性質且柔軟、可呼吸且 具彈性。然而,已知積層材的—主要缺點係在於活化製程 至少部分地破裂且破壞布狀料致__化制材具有減 小的抗拉強度及抗穿刺性。當用來作為可棄式褲物件中的 -底座組件時,材料在曝露於褲物件穿上或拉除所產 力量時容易撕裂。對於常具有可能穿透及撕裂褲材料之長 20 200804077 指甲的女性穿戴者或照護者此撕裂問題特別顯著。 因此’需要-㈣於可棄式褲物件中之經 性拉伸、纺織物狀積層材。並且, tw 材之製程。 41以製造此積層 产及ίϊ刺r明之-目㈣提供—具有較㈣抗拉強 度及抗牙刺性之可彈性拉伸_物狀積層材。本發明之另 一目的係提供—用以製造-具有經改良的抗拉強度及抗穿 刺性的可彈餘伸_物_騎之料。 【明内容】 10 15 2〇 發明概要 積二供一用以製造一包含至少三層的可彈性拉伸 a) 製二τ根據本發明包含以下步驟: 二及-;:層材,其包含-第-亀 b) 藉由增量拉伸來 為可彈性拉伸; —、層材以使第―積層材成 c) 將經活化第_積層材在至少 10-200% ;及 方向中拉伸 d) 將經拉伸第—積声 爲 網膜。 、曰材積層至-第二非彈性非織造物 以/禪 黏劑結合、熱妹 第一積層材可心何適當方式製造 性膜形成聚合物對於括精由 衫_塗覆。 非織痛網膜作 中之積廣讨 第-積層材的技伸量係被指定為拉伸方向 7 200804077 的初始、未拉伸延伸之百分比。範例中,-具有hn的第— 未拉伸長度且被拉伸50%之積層材係具有1.5m的第二經拉 伸長度。 根據本發明的一較佳實施例,以彈性 5層纖祕非織造物網膜藉以製造第—積層材。技塗 =膜較佳被穿孔藉以提供所製造積層材中之可啤吸 性。當第-非織造物網膜藉由擠製塗覆結合至彈性膜時, 可使經合併彈性層及非織造物網膜穿過一真空積層筒上方 同時彈性層處於一融化或半融化狀態藉以作出穿孔步驟。 ίο此製程揭露於美國專利案號5,733,628中且導致彈性膜被形 成為一三維開孔狀積層材層。 ^ 活化步驟包含增量拉伸第一積層材以使非彈性材料至 V P刀地破4°可藉由具有互f且藉此拉伸積層材之圓周 式配置的齒之經加熱或未經加熱互嚅齒輪滾子來進行活 I5化/舌化步驟可讓積層材隨後被拉伸而不被非彈性非織造 物網膜可察覺地拘限。非彈性非織造物材料的破裂程度係 决定所產生的積層材之最大可能伸長。⑹果非織造物材料 在活化製私中完全地破裂,積層材將具有與彈性膜層實質 地相同之最大伸長。 zo 進行第二積層步驟之前,第一積層材在至少一方向中 被拉伸10至200%其初始未拉伸延伸。藉由選擇及控制拉伸 1,可以獲得終端積層材的一選定彈性。第一積層材在與 第二非彈性非織造物網膜作積層之前係較佳拉伸乃至 180%其未拉伸延伸、更佳5〇至15〇%其未拉伸延伸且最佳7〇 8 200804077 至120%其未拉伸延伸。 第二非彈性非織造物網膜可黏劑式結合至經活化第一 積層材。 4者’第—非彈性非織網財熱性或超音波性結 5合至經活化第一積層材。熱性或超音波性結合可能為諸如 — ^合或線結合轉散結合的形式。藉由選擇稀疏分佈的 丄:。之-結合圖案’可以在所產生_層材巾達成比佔 • 用經結合層之間介面的大比例部分之結合圖案更高的撓 性。 材中的材料較佳係為行進網膜之形式。網膜可具 $等見度以產生-可在可棄式褲物件的製程巾隨後連續 被導入且形成物件底座的彈性部分之三層積層材。或者,、 可被切割及定形成用來產生—可棄式褲物件之分 兀件。 15
、或者’可以製造-其中第二非彈性非織造物網膜且有 ::第-積層材寬度的寬度之積層材。此三層積層材係適 ^氣造可棄式褲物件時連續地導人製程中且可形成物件 底座的彈性及非彈性部分。 一 t且兩或更多個行進的第—積層材網膜可結合至第 彈時織以物網膜。不同的雙積層材網膜可能已經拉 至不同範圍及/或可由材料的不同組合製造。 弟-及第二非彈性非織造物網膜可包含熱塑性纖維。 、用於纖維性_造物網膜之適當聚合物的範例係為聚乙 稀聚酉旨、聚丙烯及其他聚烯烴均聚物及共聚物。—特別 9 200804077 良好適合的非織造物網膜係包含身為聚丙稀及聚6稀纖維 的混授物之熱塑性纖維。較佳的網膜係 的熱塑 性纖維★且含有至少观熱塑性纖維及較佳至少80%熱塑性 纖維。第二及/或非雜纖維性非織造物網膜—據將被併入 5 -可棄式褲物件的接合部及接縫巾。因此,减要使非織 造物網膜可由熱量或超音波炼接製程作熔接。 特別用來作為第二非彈性非織造物網膜之〆特別類变 • W非織造物網膜係為經皺製非織造物。經皺製#鐵造物一 般比非皺製非織造物具有更大的可伸展性及撓性。藉由對 〇於第二非彈性非織造物網膜選擇-經皺製非織造物’可以 達^就柔車人性及順應性而言比起非敵製非織造物異有更好 ^之取終二層積層材。經皺製麵造物係使^積層材 在伸長之後更容易收縮,故相較於具有-非皺製第二葬織 15糾層之對應積層材而言增加了彈性。若想要,第^非彈 * ’丨生非織造物網臈亦可為-經皺製非織造物。 鲁 ㈣本發明用來製造三層積層材之彈性膜係可屬於任 何適當的彈性聚合物,天然或合成性。已證實具有良好彈 I及可^吸性之—彈性㈣範例係為-具有聚6婦-苯乙 烯/乙烯/丁 —烯’笨乙烯_聚乙烯(pE_娜§拥)的組成物之 開孔狀三層彈性體性膜。 h ^此上下文中’彈性材料係被界定為該材料在描述中所 疋的彈险測4中受到规伸長之後於放鬆後具有小於 〇%永久性伸長之材料。 非彈性材料係為不落入彈性材料的定義内之材料。為 200804077 此,如此處所用的非彈性材料係為一可能可拉伸或不可拉 伸之材料。在一可拉伸材料的案例中,材料如根據彈性測 試所決定在受到一 30〇/〇伸長之後於拉伸及放鬆後具有大於 10%之一永久性伸長。 5 本發明亦提供一可彈性拉伸積層材,其包含一第一非 雜非,造物網膜、—第二非彈性非織造物網膜及-位於 第-及第二非織造物網膜間之彈性穿孔狀膜。第一非彈性 非織造物網膜及彈性穿孔狀膜係形成已藉由增量拉伸及部 ㈣Μ織造物賴來提供彈性之—第—彈性積層材的部 10伤。第一彈性積層材隨後已被結合至第二非織造物層同時 處於一經拉伸狀態,藉此使積層材可彈性拉伸。 為此,根據本發明之三層積層材係包含一包括一非織 造物網膜及-彈性穿孔狀膜之第一彈性雙積層材 。彈性雙 積層材係由-層纖維性材料及一彈性層所構成。選擇纖維 15 1^以使其對於積層材提供一柔軟且布狀的感覺及外觀。 適當材料的範例係為融喷網膜及紡黏材料、及皺製非織造 物,如上述。此等材料亦適合被附接至雙積層材之第二非 織造物網膜。然而,可使用任何柔軟、撓性及較佳可伸展 卜非織k物材料及非織造物積層材,諸如纺黏-融噴_紡黏積 20層材(SMS)、梳理及紡黏材料。 弟非織造物網膜的基重係適當地為10至80 g/m2且較 ^為13至50 g/m2。纖維性材料中所使用之適當聚合物的範 例係為聚乙稀、聚g旨、聚丙稀及其他聚稀烴均聚物及共聚 物。亦可使用譬如綿等天然纖維,只要其提供所想要的性 11 200804077 質即可^合物的-混合物可有助於非織造物層的較高繞 ! 生且藉此對於非織造物村料提供最大負載時之一較高伸 長。聚乙烯及聚㈣聚合物之-混合物已經證實可提供此 方面的良好結果。亦可能採用不同聚合物的纖維之-混合 5 物。 根據本發明的一實施例,彈性層係為-具有10至 120g/m之間、較佳15至6〇咖2之間的基重之開孔狀彈性 膜。膜可為任何適當的彈性聚合物,天然或合成。彈性膜 之有用材料的部分範例係為低晶性聚乙烯、經金烯 1〇 (metall〇Cene)催化低晶性聚乙烯、乙烯醋酸乙稀共聚物 (服)、聚胺基甲酸醋、聚異戊二稀、丁二稀_苯乙稀共聚 物、苯乙烯肷段共聚物諸如笨乙烯/異戍二稀/苯乙稀⑽)、 苯乙烯/丁二烯/苯乙烯(SBS)、或笨乙稀/乙稀-丁二稀/苯乙 烯飯段共聚物等。亦可使用這些聚合物的混搜物,以及其 15他修改性彈性體性或非彈性體性材料。一適當膜的範例係 為一具有聚乙烯-苯乙烯/乙烯/ 丁二烯/苯乙烯_聚乙烯 (PE-SEBS-PE)組成物之開孔狀三層彈性體性膜。 彈性雙積層材例如可藉由將非織造物網膜施加至膜的 一側而根據WO 03/047488或EP 〇 715 351揭露的任一方法 20被製造及活化。非織造物網膜及膜可被擠製結合或可藉由 黏劑結合。雙積層材係被增量拉伸以活化膜層的彈性。可 令增量拉伸到達非彈性非織造物網膜的峰值負載處之伸長 以下之一點以保持非織造物網膜中的部分強度。或者,可 進行拉伸以使非織造物完全地撕裂,如w〇 〇3/〇47488所揭 12 200804077 經活化雙積層材根據本發明係進一步積層至一非彈性 非織造物網膜。在雙積層材於至少一方向中被拉伸1〇至 200%其初始未拉伸延伸、較佳35至180%其未拉伸延伸、更 5佳50至150%其未拉伸延伸且最佳70至120%其未拉伸延伸 之同時進行此第二積層製程。 第二及/或第一非彈性非織造物網膜較佳係包含一高 含量亦即至少50%且較佳至少8〇%之熱塑性聚合物纖維,諸 如聚乙烯、聚丙烯及聚酯。本發明的一特別實施例中,第 10 -及/或第-非彈性非織造物網膜係包含至少8〇%的聚丙稀 纖維。 15 20 兩步驟積層製程係導致一三層積層材,其中在施加第 -非織造物賴之表面上具有—平坦面,且在施加第二非 罔膜之相對表面上具有__略為聚集、縮攏狀面。用 來作為—褲物件巾的—可拉伸組件時,三層積層材可定向 成使平坦驗於物件㈣㈣制面朝外。彻此方式, 積層材的皮膚接觸部份將對於穿戴者线特別柔軟、平坦 二磨刮。然而’或者可以將積層材配置成使平坦面位於 =牛ΓΙΓ卜側。利用此方式’獲得—具有與穿在吸收性 件1Γ 接觸之—平坦表面之吸收性物件。當物 式:積2衛生褲或失禁褲時,此實施例可能是有利方 降低禪騎錢覆ttr止祕雜性接合物件表面並 且,一平坦外#:於9褲物件的區域中呈凸脊之風險。並 、將疋果觀的且在吸收性物件穿在薄或緊 13 200804077 身配合衣物下時較不明顯。 根據本發明之三層積層材係柔軟、具彈性且呈紡織物 狀並比起先前已知的積層材具有顯著較高的抗拉強度及抗 刺穿性。因此,當使用在一褲物件中時,三層積層材係顯 5著地降低在穿戴者養4上在上或往下拉時意外破壞該褲之 風險。 圖式簡單說明 將在下文中參照圖式更詳細地描述本發明,其中 第1圖顯示根據本發明之一積層製程; 10 第2圖顯示根據本發明之一三層積層材; 第3圖顯示側接合部呈現開啟之一褲尿布的平面圖;及 第4圖顯示具有關閉的側接合部之第3圖的尿布。 【實施方式3 較佳實施例之詳細說明 15 弟1圖示思地顯示根據本發明之一製造一可彈性拉伸 二層積層材之方法。一第一非彈性非織造物網膜丨係自一儲 存輥2進給至一橡膠輕3與一金屬輥4之間的一第一結合輥 隙中。一融化彈性膜形成聚合物6係經由一壓模7擠製至輥 隙及第-㈣性非織造物_ 4且彈性卿成—在滾子9 2〇處被取下之第-積層材8。隨後使積層材穿過互舊齒輪滾子 10、11之間使得第-積層材8受到增量拉伸藉以活化第一積 層材8。存在有夕種不同拉伸技術,如〇 7μ 所述。 依據互健輪滾子的設計而定,可在機器方向(MD)中或在 父又機器方向(CD)中增量拉伸以對角地拉伸積層材。可藉 200804077 由調整齒輪滾子上的互1元件或齒之互《度來控 制增量 拉伸所成之第一非織造物網臈的破裂量。增量拉伸係釋 放或活化彈性膜的彈性並可容許兩層第一積層材8彈性地 延伸。 5 一第二積層步驟中,藉由穿過以不同速度被驅動的一 對滾子12、13之間來拉伸第一積層材8。第一積層材8在至 少一方向中被拉伸10至200%其初始未拉伸延伸。藉由選擇 及控制拉伸量,可能獲得終端積層材中之一選定彈性。第 一積層材8在與第二非彈性非織造物網膜18作積層前及活 10化後係較佳拉伸35至180%其未拉伸延伸、更佳5〇至15〇%其 未拉伸延伸且最佳70至120%其未拉伸延伸。第一積層材8 的拉伸程度係為決定最終三層積層材19彈性之一主要因 素。影響最終三層積層材彈性之其他因素係為第二非彈性 非織造物網膜18的撓性及可伸展性。第一積層材8及第二非 15 彈性非織造物網膜之間的經結合區域亦確實會影響三層積 層材19的撓性及彈性。為此,一大的經結合區域將減小最 終積層材中的彈性,稀疏分佈的結合點則將對於彈性具有 很小或可忽略的影響。 經活化第一積層材8拉伸之後,積層材8的膜側14係塗 20覆或喷灑有黏劑且隨後連同一第二非彈性非織造物網膜18 穿過兩結合滾子16、17之間的一第二結合輥隙。黏劑較佳 為一熱塑性黏劑,但如果想要亦可使用其他類型的黏劑。 所產生的三層積層材19係可彈性拉伸且具有主要依據 彈性膜彈性、增量拉伸步驟中第一非織造物網膜的撕裂程 15 200804077 度及第-積層材8黏合至第—非彈性非織造物_i8前的 拉伸量而定之-選定彈性。然而,如上述,相對於繞性及 可伸展性及第二積層步驟中所實行的結合量而言之第二非 彈性非織造物_的性質《實會影響最終積騎的彈:。 第-結合輥隙中之金屬輥4較佳為_開孔狀吸取輕,藉 以與膜6結合至第-非織造物網膜i之作㈣時地達成經^ 製彈性膜6的三維成形及開孔之作用。 可替代性地藉由熱性或超音波性結合來進行第二積層 步驟。 10 15 20 第1圖為根據本發明之方法的高度示意性代表圖。缺 而,所有侧步驟皆為該技藝·知及描述。第丨圖未和 個別網膜的寬度。積層材材料可製成使所有網 二 寬度或者CD延伸。或者,第二非織造物網膜可比彈性胸 及第一非織造物膜1具有—更大寬度且可在其-或兩側上 延伸經過第一積層材。 1 第2圖所示的三層積層材19係包含一由—非 造物層1及一彈性膜所組成之第一雙積層材8。彈性膜2 孔狀且具有貫穿配置之多數個開孔。開孔係可為三維形: 的開孔如wo 〇3/〇47488所揭露或可為經過膜之簡單的: 孔。積層㈣進一步包括一第二非彈性非織造物層!二 稭由黏劑或藉由諸如絲熱钱超音財仏熱: 合至第一積層材8。 皮結 三層積層材19具有位於第一非織造物層m側上之— 平坦面21及位於第二非織造物層_侧上之-不規則維攏 16 200804077 狀面22 k疋由於第二非織造物層18已經結合至第—二厣 積層材8且二層積層材處於—彈性延伸狀態所致。三層2 材19係為柔軟、可下齿1古 、曰 了下垂具有—駄選㈣性且極為適入 二 使用在不__可棄式褲物件中。未經增量拉伸的第° 之 非織造物層係提供積層材的強化、提供垂直於拉伸方向、 較高抗拉強度、使積層材具有抗穿刺性、且可容許積層^ 受到穿上與脫下褲物件時所產生之拉力及拉伸力而盔:
或撕裂。 “、、衣 >並且,藉由選擇具有熱塑性性質之非織造物材料,可 1〇以獲件一可易於藉由熱溶接技術併入-可棄式物件中之積 層材。譬如,-其中將積層材定向成使第一非織造物層他 於物件内側上之物件中,如果第一非織造物層實質或完全 由車乂佳為聚丙稀等熱塑性纖維製成將是有利的。第一非織 Μ造物層隨後可用來形成具有良好抗拉強度之側接合部。反 之如果將積層材定向成使第二非織造物層位於褲物件内 側上’對於第二非織造物層選擇一熱塑性材料可能是對應 制的方式。因為側接合部中所使用的熱結合通常係穿透 、、二、溶接材料’積層材相對於第一及第二非織造物層之定向 2 對於獲彳于一熱結合接合部而言並不重要,只要該等層 ^至)-者主要由熱塑性纖維製成或兩層的組合含有充分 熱塑性材_料成充分結合強度即可。 。第3及4圖所示的褲尿布300係設計成可包圍一穿戴者 ϋ體的下部份就像習知的内褲。第3圖中,尿布從内側顯 $亦即從當穿戴物件時面對穿戴者之側;且第4圖中,尿 17 200804077 布從外侧或衣物面對側顯示,其係為穿戴尿布時背離穿戴 者之側。 尿布具有一前面板3〇1、一背面板3〇2及一延伸於前與 月面板301、302之間且相較於前與背面板3〇1、3〇2具有_ 5相對較窄寬度之胯面板303。前及背面板3(Π、302配置成可 覆盍穿戴者臀部且延伸於腹部上方及穿戴者背部以包繞穿 戴者軀幹的下部份。 尿布進一步包含一自胯面板303延伸至前面板301及背 面板302中之核心區3〇4。前及背面板3〇1、3〇2係形成延伸 1〇於尿布300的衣物面對侧上且圍繞核心區304之一底座307 的部份。底座307包含前面板3(^、背面板3〇2及胯面板3〇3 及一固接至前及背面板之彈性腰帶3〇9。前及背面板各者分 別具有一腰邊緣、一胯邊緣及一對側邊緣。 為此,面板’’用語在此處用來代表尿布底座的一功能 15性部份,而“區”及“部分,,用語則用來代表底座中之尿布的 一特定特徵結構的區位或描述尿布的一特定部份相對於一 使用者身體之預定定位。-面板可為一分離組件或底座的 一整合部份。一區或部分可具有一完全或部分地覆蓋一或 多個面板之延伸。 2〇 纟及背面板藉由熱結合、超音波溶接、膠串或類似物 沿著其側邊緣接合至彼此以形成側接縫3〇8,如第4圖清楚 地顯示。彈性腰帶309係由分別固接至前面板斯及背面板 302之一則部分及一背部分所組成。腰帶3〇9的這些部分亦 沿著側接縫308接合至彼此。藉由接合前及背面板川卜如2 18 200804077 及腰帶309,褲尿布300設有一腰開口 31〇及一對腳開口 31卜 第3圖顯示尿布處於一扁平狀態,其中在拉應力下附接 至底座307之任何彈性組件皆以底座3〇7的完全未拉張維度 畫出。第4圖顯示褲尿布3〇〇,其呈現側接縫3〇8已經形成且 5已讓經拉張彈性元件放鬆及收集底座材料以形成經彈性化 腳及腰開口 311、310時之情形。 根據本發明之一彈性積層材320係可覆蓋腰帶309的前 及背部分之間的整體尿布,包括核心區3〇4。然而,褲尿布 3〇〇的胯面板303之一實質部份亦即至少5〇%且較佳至少 10 75%最好係不含彈性積層材材料。 口此,一較佳身為非彈性材料諸如非彈性非織造物材 料之胯材料312係配置於物件的核心區3〇4中且重疊於彈性 則及背面板301、302。胯材料312沿著其橫向邊緣313、314 接。至如及背面板3〇1、302。圖示實施例中,胯材料312以 15 一重疊方式藉由胯接縫315接合至前及背面板30卜3〇2並形 成勝面板3G3。可膽何適#方式作丨接合,諸如藉由超音 波熔接、黏劑性或類似方式。本發明的替代性實施例中, 一外非織造物材料可連續地延伸於前及背面板301、3〇2及 胯面板303上方故在面板3〇3、301、302之間不需要接缝。 2〇 圖示範例中,彈性腰帶309包含第一及第二薄層的實質 非彈性非織造物材料,其藉由一或多個諸如彈性線或帶等 ^形彈性構件316被彈性m第三薄層係可自已經翻 摺於自身上之單層的材料形成或可身為兩分離條帶的材 料。彈性構件16以一經拉張狀態配置於腰帶309中故在容許 19 200804077 其放使其收縮及聚集腰帶中的非織造物材料,如第* 所示。 ^ 彈性腰帶3〇9固接至前及背面板3〇1、搬而其中彈性構 件316處於-延伸狀態且其中前及背面板中的材料被嵌爽 5於腰帶中的非織造物薄層之間。或者,彈性腰帶可為1 製且分別接合至前及背面板301、3〇2外側或内側之組件。 可諸如藉由超音波熔接、熱熔接或黏劑性等任何適當方式 來製造腰帶309及前及背面板3〇1、3〇2之間的腰帶接合部 317。另一選項係自亦身為前及背面板3〇1、3〇2的部份且形 10成其連續延伸部之一或多個非彈性非織造物層來生成腰帶 309。 彈性構件316亦配置於腳開口 311的邊緣處且用來彈性 化腳開口。位於腳開口處之彈性構件可屬於諸如彈性線、 帶、泡綿條帶或類似物等任何種類的習知彈性元件。 15 核心區304的平面性延伸係由配置於一吸收性核心319 與底座307間之一液體不可滲透性背片318所界定。液體不 可滲透性背片318為長方形且吸收性核心為漏斗形。因此, 液體不可滲透性背片318位於吸收性核心319及緊接在吸收 性核心319外侧的相鄰區域下方。胯面板3〇3中的非織造物 2〇材料係配置於液體不可滲透性背片318的衣物面對側上。核 心區3 04延伸至前及背面板3 (H、3 02中使得這些面板中的彈 性積層材320重疊於核心區304外部份中之液體不可渗透性 背片318如第3圖所示。彈性積層材320配置於液體不可滲透 性背片318的衣物面對侧上。 20 200804077 如圖所示’根據本發明之彈性三層積層材3 20較佳形成 褲尿布300的前及背面板3〇1、302。然而,可以只製造彈性 三層積層材320的各別前及背面板3〇1、3〇2部份。此等實施 例中’如弟3圖所示扁平狀態所示的底座之至少2〇%、較佳 5至少25%、更佳至少3〇%及最佳至少40%的總表面積係由根 據本發明之彈性三層積層材構成。一範例中,彈性積層材 可只使用在預定配置於穿戴者臀部上且因此形成彈性側面 板之前及背面板301、302部份中。亦可能設計一褲物件而 在核心區304與前及背面板3〇卜3〇2中的彈性積層材材料之 1〇 間無任何重疊。 使用根據本發明之彈性積層材320時不需要任何額外 彈性化侧面板。若想要,可提供額外彈性化側面板,特別 疋彈性積層材320只配置於前及/或背面板3〇1、3〇2部份中 之案例中尤然。 15 測試方法描述 拉拉強度(參考:ASTM D 882) 該方法測量不同彈性材料之抗拉強度及伸長。—經良 好界定的測試件之抗拉強度及伸長係由一拉力測試器作測試。 裝備:Instron 4301 •連接至一電腦之拉力測試器 •十字頭速度:500mm/分鐘 •夾固距離:50mm 整體寬度切割。樣本寬 至少比夾固距離更長 樣本製備:測試樣本自材料的 度將為25.4mm且若可能則長度 21 200804077 5〇mm。樣本的邊緣務必平整且無破裂凹口。樣本在測試之 前係於50%腿5魏及2坨饥中馳至少4小時㈨。 程序:拉力測試器根據裝傷使用指示作校準且歸零。 安裝樣本且確保其未歪斜或不平均地緊固。利用覆有緞帶 5 (gall—或類似材料的夾件來防止材料滑移。拉力測試器被 啟動’且在材料破裂後停止(縣受自動控制)4可能,忽 略過早失效(亦即樣本在夹固處破裂或製備期間受損)所導 致之測量。 下列結果係以拉力測試器/電腦表示: 10 -最大力,N/25.4mm -最大力的伸長,% -破壞力,N/25.4mm -破壞力之伸長,% •曲點(knee point),N/% 15 彈性測試 該方法測量一彈性材料在重覆負載及卸載的循環中如 何表現。樣本拉伸至一預定伸長且進行〇與該預定伸長之間 的一循環運動。記錄所想要的負載及卸載力。測量經放鬆 材料之永久性亦即留存的伸長。 2〇 使用一能夠進行循環性運動且配備有一印表機/繪圖 機或軟體簡報之拉力測試器Lloyd LRX。藉由將樣本切成 25mm寬度及較佳比拉力測試器中的夾件間距更長2〇111111之 長度來製備樣本。 拉力測試器根據裝備使用指示作校準。測試所需要的 22 200804077 參數(負載及卸載力)調整成:
•十字頭速度:500mm/分鐘 •夾固距離:50mm •預負載·· 0.05N 5 樣本根據標記放置在夾件中且確保樣本1被垂直地定 • 心且緊固於夾件中。拉力測試器被啟動且進行〇及等於最高 界定為第一負載之預定伸長之間的三個循環。最後循環之 前,樣本放鬆1分鐘,然後藉由拉伸樣本直到偵測出—〇1N 攀 力且讀取伸長為止來測量永久性伸長。 10 <彈性材料係界定為_在上述測試中材料受到遍伸 長之後於放鬆後具有小於10%的永久性伸長之材料。一. 伸長係指伸長至比樣本初始長度更長30%之一長度。 如此處所用的-非彈性材料係為一在已受到根據彈性 測試所決定的一30%伸長之後於拉伸及放鬆後具有大於 15 10%的一永久性伸長之材料。 — _穿刺強度 Φ _AS™代號D3763_02來測量穿刺強度。從穿刺衝 擊型測試,此方法產生負載vs•位移的資料。計算對於各樣 本之最大負載。 20紐 對於三樣本測量機器方向(MD)及交叉機器方向(CD) 中之抗拉強度。 樣本A為一包含一内開孔狀三層彈性體性膜之習知經 活化二層積層材,其包含基重36g/m2之pE_SEBS_pE,及各 23 200804077 有22g/m2基重的PP(聚丙烯)之兩外層的紡黏材料。藉由將一 紡黏層施加至膜同時膜處於一黏性狀態且譬如利用一壓敏 性熱融黏劑(膠量3g/m2)將另一紡黏層黏劑性積層至膜層來 製造積層材。積層材被增量拉伸,其中非彈性紡黏層被拉 5 伸至位於最大負載的伸長以下之一點以保留紡黏層中的部 分強度。 積層材中的層之基重係為活化後之基重。活化前,個 別層的基重係為:内膜層40g/m2,外紡黏層各25g/m2,而 膠層3g/m2。 10 樣本B為一包含一第一經活化雙積層材之三層積層 材,第一經活化雙積層材係包含22g/m2基重的一紡黏非織 造物PP層及基重36g/m2的PE-SEBS-PE的一開孔狀三層彈 性體性膜,其已在70%拉伸下與一具有18g/m2基重的紡黏非 織造物層(來自聯盟工業(Union Industries SpA)的 15 S1800PHW)作進一步積層。 樣本C為一包含樣本B的經活化雙積層材之三層積層 材’其已在70%拉伸下與一具有20g/m2基重的紡黏非織造物 層(來自福路登堡(Fruedenberg Fliesstoffe KG)的 Lutrasil 9520XF)作進一步積層。 20 樣本D為一包含樣本B的經活化雙積層材之三層積層 材,其已在25%拉伸下與一具有20 g/m2基重的經皺製非織 造物紡黏物(來自第一品質(First Quality))作進一步積層。經 敵製非織造物係在皺製時壓實至50%。 樣本E為與樣本D中相同但其中雙積層材在與經皺製 24 200804077 非織造物層作積層期間拉伸40%之三層積層材。 測試結果顯示於下表1。 樣本 抗拉強度 MD N/25 mm 抗拉強度 CD N/25 mm 穿刺力N A ~34~ 9 40 B ~42 26 74 C "40 33 80 D 25 38 73 E 22 44 77 表1
如表1所示,根據本發明的積層材B-E比起先前技藝三 層積層材具有顯著更高的MD及CD抗拉強度及更高的抗穿 刺性。 【圖式簡單說明:3 第1圖顯示根據本發明之一積層製程; 第2圖顯示根據本發明之一三層積層材; 第3圖顯示側接合部呈現開啟之一褲尿布的平面圖;及 第4圖顯示具有關閉的侧接合部之第3圖的尿布。 【主要元件符號明】 1...第一非彈性非織造物網膜 2···儲存輥 3. ··橡膠輥 4. ·.金屬輥 6··.彈性膜 7··顧 8···第一積層材 9, 12, 13…滾子 10,11…齒輪滾子 14…積層材的膜側 16,17…結合滾子 18…第二非彈性非織造物網膜 19…三層積層材 21. ··平坦面 22. ··不規則縮攏狀面 301·.·前面板 25 200804077 302...背面板 311…腳開口 303...胯面板 312···胯材料 304...核心區 313,314…橫向邊緣 307...底座 317…腰帶接辦 308...側接缝 318…液體不可滲透性背片 309…彈性腰帶 319."吸收性核心 310...腰開口 320…彈性積層材 26
Claims (1)
- 200804077 十、申請專利範圍: -種用以製造—包含至少三層之可彈性拉伸積層 方法, m 其特徵在於4製造一第―積層材,其包含-第-非彈性纖維性 非織造物網膜(nonw〇venweb)及一彈性膜; b)藉由在至少一方向中增量拉伸來活化該第一積 層材以使該第-積層材成為可彈性拉伸; 、 〇將該經活化之第-積層材在至少-方向中拉伸 10至 200% ;及 d)將該經拉伸之第一積層材積層至一第二 非織造物網膜。 2.如申請專利範圍第旧之方法,其中以該雜膜來掩製 塗覆該第-纖紐非織造物網_以製造該第—積層 【如申_咖第域2項之方法,其中該雜膜被^ • ^申料職圍第丨、2或3項中任—項之方法,其中該 =二非彈性_造物_係黏劑性結合至該經活化的 第一積層材。 申料利範圍第卜2或3項中任—項之方法,其中該 弟二非彈性非織造物網膜係熱性或超音波性結合至該 經活化的第一積層材。 如剛述^專利範圍任—項之方法,其中該第一積層材 在與該第二非彈性非織造物網膜作積層之前係被拉伸 /、未拉伸延伸日讀奴⑽%、更佳係餘伸其未拉伸 27 200804077 K申%的5G至15G%且最佳係被拉伸7()至i 2〇%。 7·如前述中請專利範圍任—項之方法,其中該第二非彈性 非織造物網膜具有比該第一積層材的寬度更大之—寬声。 8.如料巾請專利範__項之方法,其中該第—及了或 該第一非彈性纖維性非織造物網膜包含熱塑性纖維。 ‘如申请專利範ϋ第8項之方法,其中該第—及/或該第二 非彈性纖維性非織造物網膜包含至少观熱塑性纖維 及車父佳至少80%熱塑性纖維。 如則述中㈣利範圍任_項之方法,其中該第二非彈性 非織造物網膜為可伸展性。 申μ專利範圍第1〇項之方法,其中該第二非彈性非織 造物網膜為一經皺製非織造物。 12·-種包含-第_非彈性非織造物網膜、—第二非彈性非 織造物網膜及一位於該第一與該第二非織造物網膜之 間的彈性膜之可彈性拉伸三層積層材,其特徵在於該第 非彈性非織造物網膜及該彈性膜係形成一已藉由增 1拉伸及部分地撕裂該第一非織造物網膜而成為彈性 之第一彈性積層材的部份且該第一彈性積層材已在一 π拉伸狀癌下結合至該第二非彈性非織造物層,藉此使 該積層材可彈性拉伸。 13·如申請專利範圍第12項之可彈性拉伸積層材,其中該彈 性膜被穿孔。 、 14·如申請專利範圍第12或13項之可彈性拉伸積層材,其中 該第一非織造物網膜為一融噴網膜或一紡黏網膜而該 28 200804077 一非織迈物網膜為一融噴網膜或一紡黏網膜。 汝申明專利範圍第12、13或14項中任一項之可彈性拉伸 積層材,其中該第一非織造物網膜具有從1〇至8〇名/以2的 基重且較佳具有從13至50g/m2的一基重。 如申明專利範圍第12至15項中任一項之可彈性拉伸積 層材,其中該彈性膜層具有1〇至12〇§/1112之間、較佳15 至60g/m2之間的一基重。17·如申請專利範圍第12至16項中任一項之可彈性拉伸積 層材,其中該第一及/或該第二非彈性非織造物網膜包 含熱塑性纖維。 18·如申請專利範圍第17項之可彈性拉伸積層材,其中該第 及/或該第二非彈性纖維性非織造物網膜包含至少 50%的熱塑性纖維及較佳至少8〇%的熱塑性纖維。 •如申凊專利範圍第12至18項中任一項之可彈性拉伸積 層材,其中該第二非彈性非織造物網膜為可伸展性。 20·如申請專利範圍第22項之可彈性拉伸積層材,其中該第 二非彈性非織造物網膜為一經皺製非織造物。 29
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2006
- 2006-05-12 BR BRPI0621657-9A patent/BRPI0621657B1/pt not_active IP Right Cessation
- 2006-05-12 CN CN2006800545628A patent/CN101437682B/zh not_active Expired - Fee Related
- 2006-05-12 AU AU2006343662A patent/AU2006343662B2/en not_active Ceased
- 2006-05-12 ES ES06747782T patent/ES2399242T3/es active Active
- 2006-05-12 US US12/300,398 patent/US8741083B2/en active Active
- 2006-05-12 JP JP2009510913A patent/JP4975807B2/ja not_active Expired - Fee Related
- 2006-05-12 WO PCT/SE2006/000564 patent/WO2007133128A1/en active Application Filing
- 2006-05-12 EP EP20060747782 patent/EP2024178B1/en not_active Not-in-force
- 2006-05-12 CA CA2649926A patent/CA2649926C/en not_active Expired - Fee Related
- 2006-05-12 KR KR1020087027516A patent/KR101293500B1/ko active IP Right Grant
- 2006-05-12 MX MX2008013624A patent/MX2008013624A/es active IP Right Grant
- 2006-05-12 PL PL06747782T patent/PL2024178T3/pl unknown
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Also Published As
Publication number | Publication date |
---|---|
CN101437682A (zh) | 2009-05-20 |
AU2006343662A1 (en) | 2007-11-22 |
PL2024178T3 (pl) | 2013-06-28 |
MX2008013624A (es) | 2008-10-30 |
ES2399242T3 (es) | 2013-03-26 |
CA2649926A1 (en) | 2007-11-22 |
TNSN08454A1 (en) | 2010-04-14 |
BRPI0621657A2 (pt) | 2011-12-20 |
JP4975807B2 (ja) | 2012-07-11 |
KR20090018902A (ko) | 2009-02-24 |
US20090208703A1 (en) | 2009-08-20 |
MY148163A (en) | 2013-03-15 |
US8741083B2 (en) | 2014-06-03 |
KR101293500B1 (ko) | 2013-08-07 |
EP2024178A4 (en) | 2011-08-31 |
AR060776A1 (es) | 2008-07-10 |
AU2006343662B2 (en) | 2011-08-11 |
CN101437682B (zh) | 2012-08-01 |
JP2009536888A (ja) | 2009-10-22 |
BRPI0621657B1 (pt) | 2018-01-16 |
EP2024178B1 (en) | 2013-01-09 |
EP2024178A1 (en) | 2009-02-18 |
TWI388424B (zh) | 2013-03-11 |
CA2649926C (en) | 2013-07-23 |
WO2007133128A1 (en) | 2007-11-22 |
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