CN103491919A - 包括孔屑的成型纤维网 - Google Patents
包括孔屑的成型纤维网 Download PDFInfo
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- CN103491919A CN103491919A CN201280020141.9A CN201280020141A CN103491919A CN 103491919 A CN103491919 A CN 103491919A CN 201280020141 A CN201280020141 A CN 201280020141A CN 103491919 A CN103491919 A CN 103491919A
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Abstract
本发明公开了一种成型纤维网,所述成型纤维网包括形成于其中的离散的三维元件,其中所述离散的三维元件中的至少一些包括具有对应孔的孔屑,其中所述孔具有周边,其中所述孔屑具有长度,其中所述孔屑沿所述孔周边的一部分附接,该部分形成连接段,其中所述连接段少于整个孔周边的约50%,并且其中所述纤维网包括膜。
Description
技术领域
本发明涉及一种具有孔屑的成型纤维网。孔屑可形成于膜或膜-非织造层压体中。
背景技术
纤维网诸如热塑性膜具有多种用途,所述纤维网包括吸收制品的组件材料(诸如顶片和底片)、包装(诸如流动包裹、收缩包裹和塑料袋)、垃圾袋、食品包裹物、牙线、擦拭物、电子元件等。对于纤维网的这些用途中的许多,纤维网具有纹理的三维表面可为有益的,其可为纤维网表面提供期望的感觉(例如柔软的、丝般的)、视觉印象、和/或听觉印象、以及一种或多种期望的特性,诸如改善的流体处理或强度。表现出期望感觉的纤维网可经由真空成形法、液压成形法、压花法等制成。
需要开发出具有期望的感觉、视觉印象、和/或听觉印象以及附加特性的纤维网。就吸收制品中所使用的纤维网而言,希望该纤维网的单一部分在该纤维网上的预定位置中包括双重特性或更多特性(诸如改善的柔软性、流体处理、或其它特性)。
发明内容
一种成型纤维网,其包括形成于其中的离散的三维元件,其中离散的三维元件中的至少一些包括具有对应孔的孔屑,其中孔具有周边,其中孔屑具有长度,其中孔屑沿孔周边的一部分附接,所述部分形成连接段,其中连接段少于整个孔周边的约50%,并且其中纤维网包括膜。
附图说明
当结合本文所附的图片阅读时,可最好地理解以下对本发明的具体实施例的详细描述。
图1A和1B为包括孔屑的纤维网的图像;
图2A-E为离散的三维元件的例子;
图3为纤维网的一部分的透视图;
图4为另一个纤维网的一部分的透视图;
图5为包括孔屑的纤维网的图像;
图6为孔屑的图示;
图7示出了包括孔屑的另一个纤维网;
图8为一对配合的成形结构的透视图;
图9为另一对配合的成形结构的透视图;
图10为另一对配合的成形结构的透视图;
图11A和11B为另一对配合的成形结构的透视图;
图12为成形结构的一部分的透视图;
图13为示出了孔和凹陷的透视图;
图14A-D示出了空隙30和突起20的示例性组合;
图15A-H为各种突起几何形状的图示;
图16为成形结构和具有不同振幅的纤维网的示意图;
图17A-C为突起对空隙的不同比率的图示;
图18为成形方法的透视图;
图19为另一种成形方法的透视图;
图20A和20B为成形方法的透视图;
图21A-C示出了实例1、2和3的齿;
图22示出了实例1的纤维网;
图23示出了实例2的纤维网;并且
图24示出了实例3的纤维网。
具体实施方式
本发明涉及一种克服了现有技术的一个或多个前述缺点的纤维网。与现有技术的纤维网相比,这种新纤维网的实施例允许形成如下纤维网,其包括呈“孔屑”或纤维网材料片形式的离散的三维元件(“3-D元件”)、以及相关联的孔。孔屑仅部分地附接到对应的孔的周边,并因此由于孔屑能够弯曲和铰接而提供期望的柔软性。就吸收制品中所用的纤维网而言,此类新结构可包括提供纤维网单个部分的那些,该纤维网在纤维网上的预定位置中具有多种特性(诸如改善的柔软性、流体处理、或其它特性)。
前体纤维网
根据下述方法将前体纤维网50转换加工为成型纤维网60。合适的前体纤维网50包括如下材料:该材料可由施加在工艺变形区中的纤维网上的应变而变形至超过它们的屈服点,使得前体纤维网50被迫在成形结构110,120的成形元件10之间适形,以产生具有离散的三维元件(“3-D元件”)62的纤维网60。前体纤维网50包括膜,诸如聚合物膜或热塑性膜,并且任选地与纤维素、箔诸如金属箔(例如铝、黄铜、铜等)层合;聚合物膜或热塑性膜;包括可持续聚合物的纤维网;泡沫;包括合成纤维(例如)的纤维质非织造纤维网、胶原膜、脱乙酰壳多糖膜、人造丝、玻璃纸等。合适的膜包括流延膜和吹胀膜。纤维网50可类似于美国专利申请12/879,567中所述的那些。在成形之前,前体纤维网50的厚度通常将在5至150微米,10至100微米,或15至50微米的范围内。其它合适的厚度包括10、15、20、25或30微米。
热塑性前体纤维网50通常将具有屈服点,并且前体纤维网50优选地被拉伸超过其屈服点以形成纤维网60。即,前体纤维网50应当具有足够的屈服特性,使得前体纤维网50可被应变而不破裂至某种程度,从而产生期望的离散的3-D元件62。如下所述,工艺条件诸如温度可因给定的聚合物而变化,以允许其在有破裂或无破裂的情况下拉伸,从而形成具有期望的离散的3-D元件62的纤维网60。因此,一般来讲,已发现优选的要用作生产纤维网60的前体纤维网50的原料表现出低屈服和高伸长特性。适于用作前体纤维网50的膜的例子包括低密度聚乙烯(LDPE)、线性低密度聚乙烯(LLDPE)、以及线性低密度聚乙烯和低密度聚乙烯的共混物(LLDPE/LDPE)。
两个前体纤维网50的至少一部分可通过压花的密封件接合,所述密封件包括形成于所述至少两个纤维网中的共配准的同心离散的3-D元件,这些离散的3-D元件具有开口近端。关于密封膜/膜、膜/非织造织物和静态密封件的更详细的内容,参见US2010/0233428和美国专利申请12/879,531。
前体纤维网50也可任选地包含用来向材料赋予某种颜色的着色剂诸如颜料、色淀、调色剂、染料、墨或其它试剂,以改善纤维网60的视觉外观。本文合适的颜料包括无机颜料、珠光颜料、干涉颜料等。合适的颜料的非限制性例子包括滑石、云母、碳酸镁、碳酸钙、硅酸镁、硅酸铝镁盐、二氧化硅、二氧化钛、氧化锌、红氧化铁、黄氧化铁、黑氧化铁、炭黑、群青颜料、聚乙烯粉末、甲基丙烯酸酯粉末、聚苯乙烯粉末、丝粉、结晶纤维素、淀粉、钛酸云母、氧化铁钛酸云母、氯氧化铋等。合适的着色纤维网在US2010/0233438和US2010/0233439中有所描述。前体纤维网50可包括各种任选成分,诸如美国专利申请12/879,567中所述的那些。
成型纤维网
根据本公开的方法来加工前体纤维网50以形成成型纤维网60,其可具有各种期望的结构特征和特性,诸如期望的柔软手感、审美上悦人的视觉外观和改善的声音效果(例如,当进行处理或手动操作时,纤维网60与前体纤维网50相比可产生更小的声音)。提供一对配合的成形结构101以使前体纤维网50适形于第一结构110和第二成形结构120的成形元件10之间。由此产生具有离散的三维元件(“3-D元件”)62的第一纤维网60,如图1A所示。图1B示出了图1A中以“3”所示的3-D元件62的放大视图;具体地,3-D元件62为孔屑73。其它示例性离散的3-D元件62绘出于图2A-E中。图2A示出了泡90,其中侧壁在横向上薄化。图2B示出罩92,图2C示出带94,图2D示出孔屑73,并且图2E示出坑96。离散的3-D元件62被成形为纤维网60的突起的延伸部,一般处在其第一表面76、第二表面78、或这两个表面上。因此,离散的3-D元件62可被描述为与纤维网60成一整体,并且通过使前体纤维网50永久地局部塑性变形来成形。离散的3-D元件62可被描述为具有侧壁70,所述侧壁限定开口近端64和开口67(例如,图3)或闭合68(例如,图4)远端。
离散的3-D元件62均具有高度h,所述高度从相邻3-D元件62之间的最小振幅Amin测量至闭合远端或开口远端66处的最大振幅Amax。离散的3-D元件62具有直径d,就大致圆柱形结构而言,所述直径为侧向横截面的外径。所谓“横向”,是指大致平行于第一表面76的平面。对于具有非均匀侧向横截面的大致柱状离散的3-D元件62、和/或非圆柱形结构的离散的3-D元件62,直径d被测量为离散的3-D元件的1/2高度h处的平均侧向横截面尺寸。因此,对于每个离散的3-D元件,可确定被定义为h/d的纵横比。离散的3-D元件可具有至少0.2,至少0.3,至少0.5,至少0.75,至少1,至少1.5,至少2,至少2.5,或至少3的纵横比h/d。离散的3-D元件62通常将具有至少30微米,至少50微米,至少65微米,至少80微米,至少100微米,至少120微米,至少150微米,或至少200微米的高度h。或离散的3-D元件62可具有至多5cm,2.5cm,至多2cm,至多1.5cm,至多1cm,至多0.5cm,至多0.1cm,或至多0.02cm的较高高度h。3-D元件62将通常具有与前体纤维网50的厚度至少相同的高度,或为前体纤维网50的厚度的至少两倍,或优选为前体纤维网50厚度的至少三倍。离散的3-D元件62可具有50微米至790微米,50微米至600微米,50微米至500微米,65微米至400微米,或75微米至300微米的直径。或离散的3-D元件62可具有至多2.5cm,至多2cm,至多1.5cm,至多1cm,至多0.5cm,至多0.1cm,或至多0.08cm的更大直径。对于具有大致非柱状或不规则形状的离散的3-D元件62,离散的3-D元件的直径可被限定为两倍于离散的3-D元件在1/2高度处的回转半径。在一个实施例中,离散的3-D元件的直径为恒定的或随着振幅的增加而减小(振幅在闭合远端或开口远端66处增加至最大值)。离散的3-D元件62的直径或平均侧向横截面尺寸在近侧部分可为最大,并且侧向横截面尺寸稳固地减小至远端。期望该结构110,120有助于确保纤维网60可容易地从成形结构110,120上移除。
前体纤维网50的薄化可由于形成高纵横比的离散的3-D元件62所需要的较深冲压而发生。例如,在闭合部68或开口67远端66处和/或沿着侧壁70可观察到薄化。所谓“观察到”,是指当在放大的横截面中观察时薄化是明显的。此类薄化可为有益的,因为当触摸时,薄化的部分对压缩或剪切提供极小的阻力。例如,当某个人触摸到纤维网60的表现出离散的3-D元件62的侧面时,其指尖首先接触离散的3-D元件62的闭合远端或开口远端67。由于离散的3-D元件62的高纵横比以及远端66处和/或沿着侧壁70的前体纤维网50的壁薄化的缘故,离散的3-D元件62提供对由人的手指施加在纤维网60上的压缩或剪切的很小阻力。
在远端66处和/或沿着侧壁70的成型纤维网60的薄化可相对于前体纤维网50的厚度或者相对于完全围绕着纤维网60的离散的3-D元件62的着陆区域61的厚度进行测量。纤维网60或3-D元件62通常将包括如下至少一部分,所述至少一部分相对于前体纤维网50的厚度表现出至少25%,至少50%,或至少75%的薄化。纤维网60或3-D元件62通常将包括如下至少一部分,所述部分相对于围绕纤维网60的离散的3-D元件62的着陆区域的厚度表现出至少25%,至少50%,至少75%,或至少85%的薄化。在一些情况下,在远端66处存在相对较少的薄化,例如,当使用相对不是很尖的突起20时。在此类情况下,据信摩擦锁定发生,从而导致侧壁70上相对较多的薄化。
当离散的3-D元件62中的至少一些包括图1A,1B,2D和5所示的孔屑73时,获得了期望的柔软感觉诸如类似于对丝绒织物的感觉。当侧壁70的至少一部分薄化并破裂时形成孔屑73,从而留下附接到纤维网60的孔83和纤维网材料片或孔屑73,如图5所示。如果使用具有纤维结构的膜层压体,则前体纤维网50应当被取向成使得纤维网60将不包括在孔屑73的孔83的平面以上突起的纤维。没有纤维在的孔屑73方向上突入到孔83中或突穿所述孔。
与本文所述的其它3-D元件62不同,孔屑73仅部分地连接到孔Pa的周边。在一个实施例中,Pa等于约孔直径d乘以π。孔屑73沿孔周边Pa的一部分在连接段CS处附接。这使得孔屑73能够比如下3-D元件62更自由地在更多方向上移动,所述元件围绕整个周边或沿孔周边在两个或更多个连接段处附接。连接段CS可相对于纵向位于孔Pa的周边的任何部分上。连接段CS为整个孔周边Pa的小于约50%,小于约40%,小于约30%,小于约20%,或小于约10%。随着连接段CS的长度变得越来越短,孔屑73可更容易地铰接、移动、弯曲、或围绕其连接段CS旋转。优选地,孔屑73可围绕连接段CS铰接。
3-D元件可包括每孔83一个孔屑73或每孔83多于一个孔屑73。在一个优选的实施例中,存在每孔83一个孔屑73。孔83可与纤维网表面76齐平,或其可高出纤维网表面76的平面,诸如呈坑的形式(例如,图2D)。因此,孔83可具有高度Ha。如图6所示,孔屑73通常将具有至少30微米,或至少65微米,或至少100微米,至少200微米,至少300微米,至少400微米,至少500微米,至少600微米,或至少700微米的长度Lc(当从其连接段延伸时)。或孔屑73可具有至多7.5cm,5cm,2.5cm,2cm,1.5cm,1cm,0.5cm,0.1cm,或至多0.08cm的更大长度Lc。或孔屑73可具有为至少两倍,三倍,四倍,或至多十倍的孔83的直径d的长度Lc。孔屑73的厚度Tc可沿孔屑73的长度Lc有变化。孔屑73的宽度可宽于,窄于,或类似于连接段CS长度。孔屑73的宽度Wc可在孔屑73的1/2长度Lc处测量。孔屑73具有纵横比ARc=Lc/Wc。ARc可大于0.5,0.75,1,1.5,2,3或4。随着该纤维网的孔屑73的纵横比ARc的增加,该纤维网将变得更柔软。孔屑73和另一个3-D元件62(其可为或可不为另一个孔屑73)的中心至中心间距是从孔屑的孔83的中心测量的。优选地,孔屑73可沿它们的长度Lc在各种点弯曲。
纤维网60上的孔屑73的数目、尺寸和分布情况可基于期望的柔软感和视觉效果预定。形成于该纤维网中的3-D元件62中的至少一些,至少25%,至少50%,至少75%,至少95%,或全部均为孔屑73。为了在一次性吸收制品或包装中应用诸如顶片、底片或防粘纸包裹物,可期望孔屑73仅从纤维网60的一个表面突出。因此,当纤维网60用作一次性吸收制品中的顶片时,纤维网60可被取向成使得孔屑73被皮肤接触以便产生较好的柔软印象。在其它实施例中,将期望在纤维网60的第一表面76和第二表面78上均具有孔屑73。就吸收制品中所用的纤维网而言,此类新结构可包括提供纤维网单个部分的那些,该纤维网在纤维网上的预定位置中具有多种特性(诸如改善的柔软性、流体处理、或其它特性)。孔屑73通常不具有与它们的孔83相同的面积,因此将不会成为良好的单向阀。
孔屑73通常将包括如下至少一部分,所述至少一部分相对于前体纤维网50的厚度表现出至少25%,至少50%,或至少75%的薄化。孔屑73通常将包括如下至少一部分,所述至少一部分相对于围绕孔屑73的着陆区域的厚度表现出至少25%,至少50%,至少75%,或至少85%的薄化。在一个优选的实施例中,孔屑73包括如下至少一部分,所述至少一部分相对于围绕孔屑73的着陆区域的厚度表现出至少75%的薄化。为了获得期望的纤维网柔软性,可使薄化最大化以获得长且窄的孔屑73。来源于孔屑73的纤维网60的厚度变化极小(然而,坑型孔83可改变纤维网60的厚度)。孔屑73可不明显地改变该纤维网的整体厚度(如果有的话)的一个原因是由于孔屑73可平贴在纤维网60上(例如,接触该纤维网或平行于它)而不是垂直于纤维网60立起。这可归因于经历进一步加工(例如,折叠、包装)的孔屑73和/或纤维网60的薄且脆的性质。孔屑73的至少一部分(除了连接段部分以外)可接触纤维网60;例如,吸收制品可包括顶片,所述顶片包括平贴顶片的接触身体的表面的孔屑。
可最优化离散的3-D元件62的“面积密度”,所述面积密度为第一表面76的每单位面积上的离散的3-D元件62的数目,并且纤维网60可包括约200至约3,000;或约200至约10,000;约220至8,000;约240至约6,000;约300至约5,000;或约350至约3,000个离散的3-D元件62/平方厘米。或纤维网60可包括约0.1至约10,000,4至约10,000,约95至约10,000,约240至约10,000,约350至约10,000,约500至约5,000,或约700至约3,000个离散的3-D元件62/平方厘米。一般来讲,当该纤维网用作例如顶片时,可最优化中心至中心间距以获得足够的触觉印象,同时最小化离散的3-D元件62之间的截留材料,诸如流体。相邻离散的3-D元件62之间的中心至中心间距C可小于约800微米或大于约800微米。其它可接受的中心至中心间距为约30微米至约700微米,约50微米至约600微米,约100微米至约500微米,或约150微米至约400微米。其它可接受的中心至中心间距为约30微米至约32,000微米,约100微米至约5,000微米,约150微米至约1,000微米,约150微米至约600微米,或约180微米至约500微米。
除了第一离散的3-D元件62以外,还可产生具有第二离散的3-D元件74和/或第三离散的3-D元件75的第二纤维网80,如下文所述且如图7所示。所述各种3-D元件62,74,75可为相同的、类似的、不同的、或它们的组合。第二离散的3-D元件74和/或第三离散的3-D元件75可与第一离散的3-D元件62相邻、在它们之间、或至少部分地与它们重叠而形成。它们可在纤维网的各个侧面上形成。所述3-D元件的位置可变化—例如,在该纤维网的中间、周边、多个区中等。第一离散的3-D元件62、第二离散的3-D元件74、和/或第三3-D元件75可为各种尺寸,并且具有各种开口远端和闭合远端的组合。在一个实施例中,第一离散的3-D元件62和第二离散的3-D元件74具有闭合远端68,而第三离散的3-D元件75具有开口远端。在一个实施例中,成型纤维网80包括呈孔屑73形式的第一离散的3-D元件,呈宏观圆锥74形式的第二3-D元件、呈簇75形式的第三3-D元件、以及不具有3-D元件的区域。孔屑73可形成于纤维网60的第一或面向身体表面76上;宏观圆锥74可形成于纤维网80的第二或非面向身体表面78上;并且簇75可形成于纤维网80的第一表面76上。孔屑73可为位于整个纤维网60上的微观纹理,而宏观圆锥74可为位于该纤维网的中心区域中的宏观纹理,并且簇75可为位于周边区域中的宏观纹理。US2010/0036338A1提供了其它纤维网,它们可与孔屑73组合。
成形结构
该成形方法可经由如下设备来执行,所述设备包括一对刚性配合的成形结构,诸如图8-10所示的那些。成形结构可包括辊、板、带、套等、或它们的组合。合适的成对的成形结构101包括但不限于:在它们之间限定辊隙的一对反转辊、一对板和一对带。在一个实施例中,如图8所示,成对的配合的成形结构101是一对反转辊102,103,它们在纵向MD上接合。使用具有辊的成形设备在连续方法情况下可为有益的,尤其是在那些其中工艺的速度受关注的情况下更是如此。在另一个实施例中,如图9所示,成对的配合的成形结构101是一对反转辊104,105,它们与纵向MD成一角度AA接合。在另一个实施例中,如图10所示,成对的配合的成形结构101是一对板106,107。在另一个优选的实施例中,成对的配合的成形结构可包括环形带。参见图10、11A和11B,在本公开的方法中使用的各个成形结构110,120(或附加纹理化步骤的任何附加成形结构210,220)包括多个成形元件10。如本文所用,“成形结构”一般是指能够赋予纤维网纹理的结构。如本文所用,“成形元件”一般是指为纤维网提供纹理的元件;成形元件的类型包括离散的突起、离散的空隙、连续的空隙、或它们的组合。成形元件可在形状、尺寸、锐度、渐缩、纵横比、和/或中心至中心间距上不同。在单个成形结构上可存在一种类型或多种类型的成形元件10。一般来讲,一对配合的成形结构包括至少两种类型的成形元件。例如,第一成形结构110可包括空隙30,而第二成形结构120可包括突起20。作为另外一种选择,第一成型结构110和第二成形结构120可具有相同类型的成形元件10;例如,成形结构110,120均可包括突起20和空隙30,如图11A和11B所示。在如图11B所示的实施例中,在相邻的突起20之间的间距作为空隙30。如本文结构或区域所用,术语“邻近”是指靠近或接近,并且不彼此接触。
如图12所示,第一成形结构110和第二成形结构120中任一个或两个的成形元件10可包括突起20或空隙30,它们选自离散的突起22(例如柱24或齿26)、脊28、离散的空隙32(例如孔34或凹陷36)、连续空隙38、沟槽39、或它们的组合。成形结构110,120还可包括完全围绕成形元件10的棱40。成形结构110,120的成形元件10可具有比在常规的纹理化或压花方法中的成形结构110,120上所用的典型图案相对较小的尺寸。本公开的方法甚至在不加热纤维网以及甚至高速情况下也能够生产出如下纤维网60,它们包括具有薄化远端66和/或侧壁70的相对较高的纵横比的3-D元件62。
图13示出了本文所述的两种示例性类型的离散的空隙32即孔34和凹陷部36之间的区别。如本文所用,“孔34”是指不包括限制开口深度的底部表面的成形结构110,120中的开口。与此相比,如本文所用,“凹陷36”是指具有限制开口深度小于成形结构110,120的厚度的底部表面或谷31的成形结构110,120中的开口。谷31可为例如多孔的或无孔的。谷31可包括开口,所述开口具有小于凹陷36的直径的宽度,所述直径通过允许空气穿过凹陷36而使凹陷36通气。例如,谷31开口可具有小于前体纤维网50厚度的宽度。谷31可为平坦的、圆形的、或尖的。
如本文所用,“沟槽39”是横截面为非圆形的空隙30,其具有大于宽度的长度并且其尺寸设定成包括一个或多个突起20。沟槽39的长度可与纵向MD或横向CD对齐,或者与纵向或横向或它们的组合弯曲成某一角度。重新参见图9,成对的弯曲辊104包括沟槽39。在某些实施例中,沟槽是弯曲的,这意味着它们与纵向成5°至85°、15°至75°、25°至65°、或45°的角度AA来运行。取决于纤维网60的用途,与纵向MD倾斜成一角度的接合成形辊能够形成具有较大强度和/或柔软性的结构(以及与如果它仅为纵向对齐时的情况不同的视觉外观)。
成形结构110,120可为固体辊,或者具有25至25,000微米,或100至5,000微米的厚度。空隙30可具有10至500微米,或25至5000微米,或甚至更大的深度。空隙30的深度应当至少与最高突起20一样高。优选地,空隙30具有为至少三倍的纤维网的总厚度的深度。孔34的深度对应于成形结构110,120的厚度,因为孔34不具有限制其深度的底部表面。
成形结构110,120的纤维网接触表面上的空隙30的周边可具有直边或可具有曲率半径,所述曲率半径从成形结构110,120的纤维网接触表面测量到空隙30中。曲率半径可为0至2000微米,优选地0至25微米,还更优选地2至25微米。在一个实施例中,使用通常称作斜面的成角度的锥形。在一个实施例中,使用直边和半径的组合。
空隙30具有至少一个直径,其对于一般的圆柱形结构为内径。例如,离散的空隙32可采用椭圆形状,而连续的空隙38可采用沟槽39的形状;每个空隙均具有两个直径,一个为长度方向上的直径并且另一个为宽度方向上的直径。空隙30的直径可将尺寸设定成包括一个或多个突起。图14A-D示出空隙30和突起20的示例性组合。在成形结构110,120的接合位置140,在突起20与空隙30之间有一个侧壁间隙42和一个末端至谷的间隙44。空隙直径取决于一个或多个突起的直径(或不一致的和/或非圆柱形的空隙的宽度)加上侧壁间隙。每个空隙30可具有40至2,000微米,50至500微米,65至300微米,75至200微米,或10至5000微米,50至5000微米,500至5000微米,或800至2,500微米的直径。或空隙30直径可甚至更大,诸如至多2.5cm。空隙30的直径可为恒定的、随着深度的增加而减小、或随着深度的增加而增加。例如,空隙30可具有第一深度处的第一直径和深于第一深度的第二深度处的第二直径。第一直径可大于第二直径,即,向内渐缩。或第二直径可大于第一直径,即,向外渐缩。
空隙30的侧壁可为完全竖直的、渐缩的、弯曲的、或者侧壁可包括它们的组合。在一个实施例中,空隙30具有渐缩的侧壁。在一个实施例中,具有向内渐缩的侧壁将通常具有0°至50°、2°至30°,或5°至25°的渐缩角度。在另一个实施例中,空隙的侧壁包括竖直和弯曲侧壁的组合。
在一个成形结构110,120上的突起20可具有不同的高度或基本上相同的高度。突起20可具有100微米至2,000微米,至少500微米,至少700微米,至少900微米,或至少1,100微米的高度。或者,突起20可具有至多7.5cm,5cm,2.5cm,至多2cm,至多1.5cm,至多1cm,至多0.5cm,或至多0.1cm的更大高度。优选地,突起20具有为至少三倍的纤维网的总厚度的高度。突起20可具有直径,就大致圆柱形结构而言,所述直径为外径。就突起20的非均匀横截面、和/或非圆柱形结构而言,将直径dp测量为突起20的在突起20的1/2高度hp处的平均横截面尺寸,如图14A所示。突起20可具有10微米至770微米,50微米至600微米,50微米至500微米,65微米至400微米,或75微米至300微米的直径dp。或突起20可具有至多2.5cm,至多2cm,至多1.5cm,至多1cm,至多0.5cm,至多0.1cm,或至多0.08cm的更大直径dp。
各种突起形状如图15A-H所示。成形结构110,120的突起20可具有远端或末端21,它们是平坦的、圆形的或尖的,这取决于是否期望产生具有三维元件(“3-D元件”)62的纤维网60,这些元件具有远端66,所述远端为开口的或开孔的67(需要成形结构110上的较尖的突起)或闭合的68(需要成形结构110上的较圆的突起)。不太尖的或圆的突起末端21可导致3-D元件62的侧壁70较多的侧面薄化并且甚至破裂形成侧面开口或孔71。在一些实施例中,成形结构110,120的突起20的末端21是圆形的并且具有某个末端半径,例如5至300微米,10至150微米,15至100微米,20至75微米,或30至60微米的末端半径。
突起20的侧壁可为完全竖直的、渐缩的、弯曲、或它们的组合。渐缩的侧壁也可允许纤维网60在成形之后更容易地与成形结构110,120分离。在一个实施例中,侧壁将通常具有0°至50°、2°至30°、或5°至25°的渐缩角度。在其它实施例中,突起20可为球形的、椭圆形的、或雪人形的(沿着突起20的高度具有不同的或变化的直径)。在一个优选的实施例中,突起20包括具有较小半径的末端21和具有较陡渐缩角度的侧壁。
单个成形结构110,120的成形元件10可具有变化的几何形状,例如突起20的高度和空隙30的深度,或者二者的组合。例如,成形元件10能够逐渐增加高度或者在几十或几百相邻突起20的范围内增加高度,这可能导致纤维网60具有不同高度的离散的3-D元件62。可调节成形结构110,120的其它结构以在纤维网60的离散的3-D元件62中形成梯度特性,所述成形结构产生离散的3-D元件62的对应结构。如图16所示,成形结构110,120可包括成形元件10的面积密度梯度。
图17A-C示出成形结构110,120上突起20对空隙30的不同比率。在一些实施例中,突起20和空隙30相对于彼此的尺寸设定为允许配合的以成功地产生本发明的纤维网60。突起20对空隙30的比率可为1:1,使得每个突起20具有对应的空隙30,如图17A所示。或者,突起20对空隙30的比率可小于1:1,使得存在额外的空隙30,其不匹配突起20,如图17B所示。额外的空隙30可简化两个配合的成形结构的对齐。或者,突起20对空隙30的比率可大于1:1,例如两个、三个、四个、或更多个突起20可设定尺寸以与仅有的一个空隙30配合,如图17C所示。突起20对空隙30的比率可在至少约1:1,至少约100:1,至少约10,000:1,或者甚至更大的范围内,例如当多个离散突起22与一个连续空隙38配合时,如图8所示。在其它实施例中,突起20不需要配合空隙30,但是能够与在其它突起20之间的空隙30间距配合。例如,图11A和11B示出一对成形结构101,其中两个成形结构110,120是包括突起20的辊,在形成空隙30之间具有间距。在这个实施例中,对准在每个辊108,109上的突起20,它们由此接合。
在某些实施例中,突起20的形状模拟空隙30的形状。例如,突起20和空隙30可一般均为圆柱形并渐缩,并且可具有匹配的或不同的渐缩角度。或者,在某些实施例中,突起20的形状不模拟空隙30的形状。例如,突起20可为圆形,而空隙30可为正方形或椭圆形。成形结构110,120的成形元件10可具有多种不同的横截面形状,诸如大致柱状或非柱状形状,包括圆形、椭圆形、沙漏形、星形、多边形等、以及它们的组合。多边形横截面形状包括但不限于矩形、三角形、六边形、或梯形。
一般来讲,成形结构110,120对于它们的给定部分将包括至少约200,至少约220;约240至约10,000;约300至约5,000;或约350至约3,000个成形元件10/平方厘米。或者,成形结构110,120对于它们的给定部分将包括至少约0.1至约10,000;4至约10,000;约95至约10,000;约240至约10,000;约350至约10,000;约500至约5,000;或约700至约3,000个成形元件10/平方厘米。本发明的一个目的是在前体纤维网50和成形结构110,120之间存在足够的纤维网张力和/或摩擦以允许形成纤维网60。纤维网50在成形期间通过纵向、横向、与纵向所成角度、或它们的组合上的纤维网张力和/或摩擦保持在原位。
参见图10,相邻突起20具有中心至中心间距C,可对其进行控制以控制所得离散的3-D元件62的间距。在相邻突起20之间的中心至中心间距可相同或不同。可接受的中心至中心间距小于约800微米(即,微观)或大于约800微米(即,宏观)。其它可接受的中心至中心间距为约30微米至约700微米,约50微米至约600微米,约100微米至约500微米,或约150微米至约400微米。其它可接受的中心至中心间距为约30微米至约32,000微米,约100微米至约5,000微米,约150微米至约1,000微米,约150微米至约600微米,或约180微米至约500微米。在一些实施例中,至少一个突起28与其邻近突起20中的至少三个,至少四个,或至少五个具有小于约800微米的中心至中心间距。或成形结构上的突起20中的至少25%,至少50%,至少75%,至少95%,或全部与它们的邻近突起20中的至少三个,至少四个,或至少五个具有小于约800微米中心至中心间距。或至少一个突起28与其邻近突起20中的至少三个,至少四个,或至少五个具有大于约800微米的中心至中心间距。或成形结构上的突起20中的至少25%,至少50%,至少75%,至少95%,或全部与它们的邻近突起20中的至少三个,至少四个,或至少五个具有大于约800微米的中心至中心间距。
成形元件10可在纵向、横向、或与纵向或横向成一角度的方向上对齐。成形元件10可被布置成随机阵列或非随机阵列。非随机阵列的例子包括矩形、六边形、正方形、以及它们的组合。可设计成形元件10的阵列以提高纤维网60的强度,例如,通过最小化纵向上的对齐,这将提高横向强度。可设计成形元件10的阵列以最大化撕裂纤维网60的简易度,例如,利用锯齿状的或直线的对齐。
在某些实施例中,一部分成形结构110,120可包括如上所述成形元件10的面积密度,而成形结构110,120的其它部分可不包括成形元件10,如图16所示。无成形元件10的成形结构110,120的区域可定位在不同的径向距离或在不同的水平面中。在其它实施例中,成形结构110,120的成形元件10可定位在不同的径向距离或在成形结构110,120的不同水平面中。位于成形结构110,120的不同的水平面中的不具有成形元件10的部分和/或具有成形元件10的部分可呈具体图案或设计的形式,诸如花、鸟、条带、波纹、卡通人物、徽标等形式,以便纤维网60将具有如下的部分,其相对于纤维网的其余部分在视觉上突显出来、和/或当触摸时具有不同的手感。例如,纤维网60可包括非成型部分,其在视觉上突显出来、和/或具有与成型部分不同的手感,诸如US5,158,819所述。无成形元件10的成形结构110,120的部分不将具有成形元件10的成形结构110,120部分中相邻成形元件的中心至中心间距要求作为因素计算在内。例如,如果具有成形元件的两个部分被不具有成形元件的第三部分分开,则不认为源自第一部分的成形元件是邻近于源自第二部分的成形元件;仅每个部分内的成形元件被认为是彼此邻近的。
用于制备成型纤维网的方法
一种用于制备成型纤维网的方法包括如下成形步骤,其中使前体纤维网移动穿过位于一对配合的成形结构之间的变形区。每个成形结构包括成形元件如突起和空隙。所得纤维网包括多个离散的三维元件(“3-D元件”)。该方法也可包括如下附加成形步骤,其中使纤维网移动穿过位于第二对配合的成形结构之间的至少一个其它变形区。所得纤维网包括由第一成形步骤赋予的多个离散的3-D元件、以及由第二成形步骤赋予的那些元件,从而提供复合纤维网。第二离散的3-D元件可从该纤维网的第一侧面或第二侧面延伸,可处在与第一3-D元件相同或类似的位置,可放置在第一3-D元件之间以增加面积密度,或可为与第一3-D元件相比更大或更小或相同的尺寸,例如,可形成具有微观纹理以及宏观纹理的纤维网。
一种合适的方法包括至少一对配合的成形结构101。成形结构可包括辊、板、带、套等、或它们的组合。合适的成对的成形结构101包括但不限于:在它们之间限定辊隙的一对反转辊、一对板、一对带等。
如果成形结构110,120的配合对101均包括突起20和空隙30,则离散的3-D元件62可形成于从与如下表面相对的纤维网60的表面延伸出的纤维网60中,从所述表面形成由成形结构110,120的空隙30所形成的离散的3-D元件62。参见例如图11A和11B。因此,可产生双侧面的纤维网60,其在纤维网60的每个侧面上具有不同图案或尺寸的3-D元件62。取决于由成形设备产生的应变、以及成形结构110,120的空隙30和任选的柱24的几何形状,纤维网60的离散的3-D元件62可具有开口的或开孔的远端67;闭合远端68;开口的或开孔的侧壁71、闭合侧壁72、或孔屑73。此外,双侧面纤维网60的一个侧面上的3-D元件62的尺寸、形状、和面积密度还可独立于双侧面纤维网60的另一个侧面受到控制。
如图18所示,用于形成纤维网60的方法100包括从第一供料辊112移动前体纤维网50穿过一对配合的成形结构101至回绕辊122。成对的成形结构101包括第一成形结构110和第二成形结构120,它们在变形区130处配合。在一个优选的实施例中,至少第一成形结构110包括空隙30并且至少第二成形结构120包括突起20。使前体纤维网50移动穿过所述两个成形结构之间的变形区130,其中第二成形结构120上的突起配合或接合第一成形结构上的空隙。成形结构110,120在接合位置140处接合并具有接合深度DOE,其中在突起20和空隙30之间存在可接受的侧壁间隙42和末端至谷的间隙44,例如,如图14A-D所示。在接合位置140,至少主要的接合空隙和突起通过约30微米至约300微米的侧壁间隙42和大于30微米的末端至谷的间隙44彼此分开。通常限定突起20的侧壁角度,使得当成形结构接合时,存在足够的纤维网间隙,并且纤维网不被成形结构剪切(其中纤维网部分相对于其它部分滑走)或夹住。辊110,120可按与纤维网被喂送穿过辊之间的辊隙时的速度基本上相同的速度旋转;或它们可按大于或小于纤维网被喂送穿过辊之间的辊隙时的速度的速度旋转。
在变形区130中对前体纤维网50所施加的力足以导致前体纤维网50适形于成形元件10以形成具有离散的3-D元件62的纤维网60。前体纤维网50对成形元件10的适形可为部分的、基本的、或完全的适形(除非发生破裂),这取决于纤维网50、在纤维网50上诱发的应变、温度和成形结构110,120的形貌特征。
该方法可任选地与其它方法组合以进一步操纵纤维网60。例如,如图19所示,纤维网60可穿过至少第二变形区230以形成第二成型纤维网80。可在任何时间将附加的纤维网引入该方法。在变形区230中对第一纤维网60所施加的力足以导致第一纤维网60适形于第二成形元件12,以形成第二成型纤维网80,其具有第二离散的3-D元件74和/或第三3-D元件75以及第一离散的3-D元件62(或它们的一些变形的变型)。图7所示的第三3-D元件75是根据US2006/0087053A1制备的。第一纤维网60对附加成形元件的适形可为部分的、基本的、或完全的适形,这取决于纤维网60、在纤维网60上诱发的应变、温度、和成形结构210,220的形貌特征。可使用第一对成形结构101和第二对成形结构201来产生图案的阴影效果,所述成形结构具有无成形元件10并控制第一纤维网60的位置的对齐部分。
第二对配合的成形结构210,220可包括与第一成形结构和第二成形结构分开的第三成形结构和第四成形结构。如图19所示,两个变形区、或辊隙130,230间距上是分开的。作为另外一种选择,第二变形区230可由第三成形结构210形成(如果它与第一成形结构110或第二成形结构120中的任一个套叠或配合的话)。例如,在如图20A所示的方法300中,成形结构110,210可与在平面排列中的成形结构120配合。成形结构110,210具有至少一些相似尺寸和/或阵列的成形元件10,从而与第二成形结构120配合。如果纤维网60仍在相同成形结构/突起20上对准,如图20A所示,则第二变形区230可产生较大的纤维网60对至少一些成形元件10(遍布各处或者在某些位置)的适形角度。如果纤维网60不在相同成形结构/突起上配准,如图20B的套叠排列所示,则第二变形区230或第三变形区330可用较便宜的加工方式并以较快的生产线速度来增加离散的3-D元件的面积密度,并且产生具有从纤维网的两个侧面延伸出的3-D元件的纤维网80。例如,参见授予Orr的、代理人案卷号12089R、与本专利申请相同的日期提交的美国专利申请12/879,567和美国专利申请序列号_(待定)_,“Method for Deforming a Web”。
尽管不受理论的束缚,但据信可调节一些因素诸如前体纤维网50;突起20和空隙30的形状、尺寸、种类、和中心至中心间距;在前体纤维网50上诱发的应变;温度;和成形结构110,120的形貌特征;以及所述施加的应变以生产出期望的纤维网60,其在纤维网60的一个或两个侧面上具有例如离散的3-D元件62,所述元件具有闭合的或开口的远端66或闭合的或开口的侧壁70等,从而获得前体纤维网50和第一纤维网60的永久性变形以分别形成第一纤维网60和第二纤维网80,所施加的应变一般足以拉伸所述前体超过其屈服点。可通过改变这些成形结构之间的接合深度来诱导不同水平的应变。在一个实施例中,孔屑在较高接合深度和/或较高温度下形成。
当期望微观纹理纤维网时,本文所公开的方法允许使用在相邻成形元件之间具有较窄的中心至中心间距以及较高的成形元件面积密度的刚性成形结构,从而生产出在相邻离散3-D元件之间具有较小标度的间距以及高密度离散3-D元件的微观纹理纤维网。以前将刚性成形结构设计为与具有较大面积密度的成形元件且相邻元件之间间距较小的成形结构相比,具有更少的成形元件且相邻元件之间的间距更宽,因为它们成本更低廉并且更容易制造,同时显著延长了使用寿命。存在用于制备微观纹理纤维网的方法,这些方法结合刚性结构使用适形材料诸如水、橡胶、和空气;然而,迄今为止,两个刚性配合的成形结构尚不能够产生具有此类小标度的微观纹理纤维网。已经发现应用成形结构技术如在US7,655,176中公开的那些形成本发明的两个刚性配合的成形结构可产生对于本发明的方法来说高速更新的模具。目前,在多对刚性配合的成形结构上形成小长度尺度的突起和空隙是可能的。
该方法可具有相对短的保压时间。保压时间是指施加到前体纤维网50或第一纤维网60的给定部分上的应变时间量,通常指前体纤维网50或第一纤维网60的给定部分定位在变形区,或在成对的成形结构101,201,301之间的辊隙130,230,330中消耗的时间量。应变通常被施加到前体纤维网50或第一纤维网60上不到约5秒,不到1秒,不到0.5秒,不到0.1秒,不到0.01秒,或者不到0.005秒的保压时间。例如,保压时间可为0.5毫秒至50毫秒。应变可在第一变形区130的第一保压时间期间施加到前体纤维网50上,并且应变可在第二变形区230的第二保压时间期间施加到第一纤维网60上。第一保压时间和第二保压时间可基本上相等或可以不同。即便使用此类相对短的保压时间,也可生产出本文所述的具有期望的结构特征的纤维网。因此,本公开的方法使得能够高速地生产纤维网。在其它实施例中,方法可具有相对长的保压时间,诸如US2008/0224351中描述的用于渐增地拉伸纤维网的方法。
前体纤维网50或第一纤维网60可按至少0.01米/秒,至少1米/秒,至少5米/秒,或至少10米/秒的速率在第一成形步骤和第二成形步骤之间喂入。其它合适的速率包括例如至少0.01、0.05、0.1、0.5、1、2、3、4、5、6、7、8、9或10米/秒。将前体纤维网50喂入第一对成形结构101之间的速率可与将第一纤维网60喂入第二对成形结构201之间的速率基本上相同或不同。
该方法的任何或每个成形步骤可在环境温度下实施,这意味着不有意地向成形结构和/或纤维网施加热量。然而,应当认识到热量可由于前体纤维网50的高应变而产生。因此,可冷却成形结构以便将工艺条件保持在期望的温度诸如环境温度。该方法的任何或每个成形步骤也可在具有升高的温度的纤维网上实施。例如,纤维网的温度可低于前体纤维网50的熔点。例如,纤维网的温度可至少低于前体纤维网50的熔点10℃。一般来讲,方法可在10℃至200℃,10℃至120℃,10℃至80℃,或者10℃至40℃的温度下进行。可通过预热步骤或通过主动加热一个或两个成形结构来加热纤维网50。所述温度可通过例如非接触式温度计诸如红外温度计或激光温度计来测量,测量变形区130,230处的温度。所述温度也可使用温度敏感材料诸如购自Paper Thermometer Company的温度标贴来确定。
成型纤维网的用途
可按许多不同的方式来利用本发明的成型纤维网,诸如吸收制品的组件材料(诸如顶片、底片或防粘纸包裹物,例如,用于女性卫生制品、尿布、或成人失禁制品)、包装(诸如流动包裹、收缩包裹、或塑料袋)、垃圾袋、食品包裹物、擦拭物、电子组件、壁纸、衣服、窗帘、盘垫、图书封面等。
实例
实例1
可使用平板成形结构110,120生产出成型纤维网60。第一成形结构110包括沿第一方向的平行连续沟槽39和平行脊28,并且沿第二方向的中心至中心间距为约520微米。脊28具有与竖直方向成约5度的渐缩角度。沟槽39具有约940微米的深度和在深度一半处约320微米的直径。第二成形结构120包括约320个齿26/平方厘米,齿26具有如图21A-C所示的一般形状。齿26被布置成矩形阵列,其具有沿第一方向约610微米的中心至中心间距和沿第二方向约520微米的中心至中心间距。齿26具有沿第一方向直的、竖直的侧壁,以及沿第二方向约10度的向内渐缩角度。齿26具有沿第一方向约610微米的高度、沿第二方向约800微米的高度,并且具有约230微米的第一直径的矩形横截面和在高度一半处130微米的第二直径。末端为圆形,具有约115微米的第一半径和约50微米的第二半径。成形结构110,120通过EDM线雕刻由铝制成。使用的前体纤维网50为具有小正方形压花图案的聚乙烯膜,得自德国的RKW-Group,厚度约为18微米,基重为约17克/平方米(gsm)。
使用高速研究压机(HSRP)在室温下实施该成形方法。设计HSRP(在美国专利2009/0120308中详述)以模拟压花前体纤维网50的连续生产线方法。操纵HSRP来模拟206mm的成形结构110,120辊直径。以约6m/sec的近似速率沿第一方向(平行于沟槽和脊)将前体纤维网50喂入1.5%预应变状态的成形结构110,120之间。接合为约600微米,在该点侧壁间隙为沿第二方向约105微米,并且末端至谷的间隙为约330微米。
图22为SEM图像,其示出了包括多个离散的3-D元件62的所得纤维网60。前体纤维网的细小方形压花图案位于表面。离散的3-D元件62主要为具有显著的侧壁和末端薄化的泡90和一些罩92的形式。离散的3-D元件62的高度为约165微米,在高度一半处的第一直径为约220微米,并且高度一半处的第二直径为约108微米。
实例2
可在类似于图8所示的设备上使用圆筒形成形结构102,103来生产成型纤维网60。两个成形结构均具有145mm的外径和189mm的宽度。第一成形结构102包括沿第一方向的平行连续沟槽39和平行脊28,并且沿第二方向的中心至中心间距为约508微米。脊28具有与竖直方向成约4.4度的渐缩角度。沟槽39具有约1,000微米的深度和在深度一半处约340微米的直径。第二成形结构120包括约287个齿26/平方厘米,具有如图21A所示的一般形状。齿26被布置成矩形阵列,其具有沿第一方向约685微米的中心至中心间距和沿第二方向约508微米的中心至中心间距。齿26具有沿第一方向直的、竖直的侧壁,以及沿第二方向与竖直方向成约4.4度的向内渐缩角度。齿26具有约1,000微米的高度和具有约305微米的第一直径(长度)的矩形横截面以及在高度一半处约170微米的第二直径(宽度)。末端为圆形,具有约150微米的第一半径和约50微米的第二半径。成形结构102,103由铝机加工而成以产生沟槽;然后将成形结构103进行EDM线雕刻以产生齿26。所用的前体纤维网50为获自Clopay Cincinnati的聚乙烯膜,其为约25微米厚并且具有约25克/平方米(gsm)的基重。
该成形方法通过在室温下以8m/s的线速度将前体纤维网50喂入到成形结构102,103的辊隙130中来进行。以纵向(平行于沟槽39和脊28)将前体纤维网50喂入成形结构102,103之间。进料侧上的纤维网张力为约1%至5%,即,在纤维网的线性弹性区域内。出料侧上的纤维网张力应当大于进料张力以保持纤维网移动。出料包角为90°。剥离惰辊250定位在距离成形辊103的0.8mm处。接合为约800微米,在该点侧壁间隙为沿第二方向约95微米,并且末端至谷的间隙为约200微米。
图23为SEM图像,其示出了包括多个离散的3-D元件62的所得纤维网60。3-D元件62为具有显著的侧壁和末端薄化的泡90、罩92和孔屑73的形式。
实例3
这个实例与实例4相同,不同的是在方法期间两个成形结构102,103均保持在70摄氏度而非室温。图24为SEM图像,其示出了包括多个离散的3-D元件62的所得纤维网60。离散的3-D元件62主要为具有显著的侧壁和末端薄化的坑96和一些孔屑73的形式。
本文所公开的量纲和值不应被理解为严格限于所述确切数值。相反,除非另外指明,每个这样的量纲旨在表示所引用的值和围绕该值功能上等同的范围。例如,所公开的量纲“40mm”旨在表示“约40mm”。
具体实施方式中引用的所有文件的相关部分均以引用方式并入本文;任何文献的引用均不可解释为是对其作为本发明的现有技术的认可。如果此书面文件中术语的任何含义或定义与以引用方式并入的文件中的所述术语的任何含义或定义相冲突,则以此书面文件中赋予所述术语的含义或定义为准。
尽管举例说明和描述了本发明的具体实施例,但是对本领域的技术人员而言显而易见的是,在不脱离本发明的实质和范围的情况下可作出许多其它的改变和变型。因此,随附权利要求书旨在涵盖本发明范围内的所有此类改变和变型。
Claims (15)
1.一种成型纤维网,包括形成于其中的离散的三维元件,其中所述离散的三维元件中的至少一些包括具有对应孔的孔屑,其中所述孔具有周边,其中所述孔屑具有长度,其中所述孔屑沿所述孔周边的一部分附接,所述部分形成连接段,其中所述连接段少于所述整个孔周边的约50%,并且其中所述纤维网包括膜。
2.根据权利要求1所述的纤维网,其中所述孔屑能够围绕所述连接段铰接。
3.根据权利要求1或权利要求2所述的纤维网,其中所述孔屑包含至少约30微米或至少约300微米的长度。
4.根据前述权利要求中任一项所述的纤维网,其中所述孔屑能够沿它们的长度在各个点处弯曲。
5.根据前述权利要求中任一项所述的纤维网,其中所述成型纤维网由具有厚度的前体纤维网形成,并且其中所述孔屑包括如下至少一部分:所述至少一部分相对于所述前体纤维网的所述厚度薄化至少约25%。
6.根据前述权利要求中任一项所述的纤维网,其中所述成型纤维网包括围绕所述孔屑的着陆区域,并且其中所述孔屑包括如下至少一部分:所述至少一部分相对于围绕所述孔屑的所述着陆区域的厚度薄化至少约25%。
7.根据前述权利要求中任一项所述的纤维网,其中所述纤维网除了所述第一纤维网以外还包括至少第二纤维网,其中压花的密封件接合所述至少两个纤维网的至少一部分,所述密封件包括形成于所述至少两个纤维网中的共配准的同心离散的三维元件,所述离散的三维元件具有开口近端。
8.根据前述权利要求中任一项所述的纤维网,其中所述孔屑包含约100微米至约800微米的相邻孔屑之间的中心至中心间距。
9.根据前述权利要求中任一项所述的纤维网,其中所述纤维网的面积密度介于约0.1至约10,000个孔屑/平方厘米之间。
10.根据前述权利要求中任一项所述的纤维网,其中所述纤维网还包括至少第二离散的三维元件。
11.根据前述权利要求中任一项所述的纤维网,其中所述纤维网为吸收制品的组件,其中所述吸收制品为女性卫生制品、成人失禁制品、或尿布。
12.根据前述权利要求中任一项所述的纤维网,其中所述纤维网包括第一表面和第二表面,并且其中所述孔屑从所述第一表面延伸。
13.根据权利要求12所述的纤维网,其中所述第一表面为接触身体的表面,并且其中所述第二表面为非接触身体的表面。
14.根据前述权利要求中任一项所述的纤维网,其中所述纤维网包括第一表面和第二表面;其中所述孔屑从所述第一表面延伸;其中所述第一表面为接触身体的表面并且其中所述第二表面为非接触身体的表面;其中所述纤维网还包括至少第二离散的三维元件;其中所述第二离散的三维元件从所述非接触身体的表面延伸;其中所述纤维网还包括至少第三离散的三维元件;其中所述第三离散的三维元件从所述接触身体的表面延伸;其中所述第一离散的三维元件、第二离散的三维元件和第三离散的三维元件在尺寸和形状上彼此不同。
15.根据权利要求14所述的纤维网,其中所述第一离散的三维元件、第二离散的三维元件和第三离散的三维元件位于所述纤维网的三个不同的区域中。
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2012
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- 2012-04-24 CN CN201280020141.9A patent/CN103491919A/zh active Pending
- 2012-04-24 JP JP2014506623A patent/JP5706037B2/ja not_active Expired - Fee Related
- 2012-04-24 WO PCT/US2012/034795 patent/WO2012148908A1/en active Application Filing
- 2012-04-24 RU RU2013143722/12A patent/RU2553031C1/ru not_active IP Right Cessation
- 2012-04-24 EP EP12719856.2A patent/EP2701657B1/en active Active
- 2012-04-24 BR BR112013025352A patent/BR112013025352A2/pt not_active IP Right Cessation
- 2012-04-24 MX MX2013011924A patent/MX2013011924A/es not_active Application Discontinuation
- 2012-04-24 CA CA2834076A patent/CA2834076A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
MX2013011924A (es) | 2013-11-01 |
KR20130133896A (ko) | 2013-12-09 |
RU2553031C1 (ru) | 2015-06-10 |
US20120277701A1 (en) | 2012-11-01 |
BR112013025352A2 (pt) | 2016-12-13 |
EP2701657A1 (en) | 2014-03-05 |
EP2701657B1 (en) | 2019-07-24 |
JP5706037B2 (ja) | 2015-04-22 |
WO2012148908A1 (en) | 2012-11-01 |
US9724245B2 (en) | 2017-08-08 |
JP2014518780A (ja) | 2014-08-07 |
CA2834076A1 (en) | 2012-11-01 |
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