CN104939978A - 制备具有吸收材料的吸收结构的方法和设备 - Google Patents
制备具有吸收材料的吸收结构的方法和设备 Download PDFInfo
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Abstract
本发明公开了用于生产具有吸收层的吸收结构的设备(1)和方法,所述吸收层具有无吸收材料的通道,所述设备和方法使用具有特定凸起条(25)的第一移动的环状表面(20)和具有特定配合条(31)的第二移动的环状表面(30)。
Description
本申请是申请人为宝洁公司、国际申请日为2012年6月8日、进入国家阶段申请号为201280028290.X(国际申请号为PCT/US2012/041522)、题为“制备具有吸收材料的吸收结构的方法和设备”的PCT发明专利申请的分案申请。
技术领域
本公开涉及一种用于通过如下方式制备具有不含吸收材料的条的吸收结构的方法:将吸收材料容纳在具有不容纳吸收材料的凸起条的第一表面上;以及将其转移至具有配合条的第二表面,所述配合条与所述凸起条会合,并且因而不容纳吸收材料;并且本公开还涉及组合了此类第一和第二表面的设备。
背景技术
吸收制品诸如尿布和卫生巾吸收和容纳身体流出物。它们也旨在防止身体流出物脏污、润湿或换句话讲污染与穿着者接触的衣物或其它制品诸如被褥。一次性吸收制品诸如一次性尿布可以干燥状态或载尿状态被穿着数小时。因此,已作出许多努力来改善吸收制品在干燥时以及在完全地或部分地载有液体流出物时对穿着者的贴合性和舒适性,同时保持或增强制品的吸收和容纳功能。
人们也作出过努力以使吸收制品在干燥时更薄,从而改善此类制品的舒适度。
一些吸收制品比如尿布包含吸收材料诸如超吸收聚合物,所述超吸收聚合物吸收极大量的液体因而导致吸收制品显著地溶胀。此类制品因此在使用期间将显著地增加体积,并且有时候特别是在穿着者两腿之间的裆区中增加体积,这可使制品变得不舒适。
因此仍然需要进一步改善此类制品的贴合性和/或液体传送离开裆部的性能。也需要减少吸收材料在此类制品中的使用量。
还需要进一步减小渗漏的可能性并且改善吸收制品诸如尿布的吸收效率。
还发现能够通过提供传送通道来获得改善的液体传送性能,所述传送通道用于在吸收制品例如其吸收结构中分配液体。此外,还令人惊讶地发现,能够因此在保持性能的同时减少吸收材料的量。还发现能够通过提供具有如下吸收结构的吸收制品来获得改善的贴合性,其中吸收材料是在加工方向上结构化的,任选地具有包括较少或无吸收材料的区域,以便在使用中改善弯曲柔韧性(在对应于加工方向的方向上)。
本公开提供了一种用于提供此类吸收结构的设备和方法,所述吸收结构具有合适的传送通道,所述传送通道允许减少吸收材料的使用量和/或改善贴合性/柔韧性。
发明内容
本公开提供了一种制备吸收结构的设备1,所述吸收结构包括支撑片材200和其上的吸收层,所述吸收层具有纵向尺寸和横向尺寸以及高度尺寸,所述吸收层包括吸收材料100,所述吸收材料在其中具有一个或多个基本上不含吸收材料的通道,所述设备1具有:
a)喂料机60,所述喂料机用于将所述吸收材料100喂送至第一移动的环状表面;
b)转移装置,所述转移装置用于将支撑片材200转移至第二移动的环状表面;
c)第一移动的环状表面20,其具有一个或多个吸收层形成贮存器25,所述贮存器具有纵向尺寸和平均长度、与其垂直的横向尺寸和平均宽度、和与它们均垂直的深度尺寸和平均深度、以及用于在其中容纳所述吸收材料100的空隙体积,所述贮存器包括一个或多个基本上纵向延伸的凸起条21(不具有空隙体积并且因此不在其中容纳所述吸收材料100),它们各自具有平均宽度W和平均长度L,所述平均宽度为贮存器25的平均宽度的至少5%(在一些实施例中任选地至少5mm),并且所述平均长度为贮存器的平均纵向尺寸的至少5%且至多80%;所述贮存器用于将所述吸收材料100转移至与其邻近且接近的所述第二移动的环状表面30;
d)所述第二移动的环状表面30,其具有包括具有一个或多个透气的或部分地透气的储槽33的外壳,所述储槽用于在其上或在其中容纳所述支撑片材200,并且所述储槽33具有一个或多个基本上纵向延伸的基本上配合条31,所述配合条各自具有平均宽度W’,所述平均宽度为0.5×W至1.2×W,任选地至少2.5mm;任选地具有平均长度L’,所述平均长度为约0.8×L至1.2×L,被提供为贮存器的纵向尺寸的至多90%,
其中所述外壳任选地连接至一个或多个辅助真空系统,所述真空系统用于促进对所述支撑片材200和/或其上的所述吸收材料100的保持,并且
其中在会合点,所述第一移动的环状表面20和所述外壳和/或第二移动的环状表面30在所述吸收材料100的转移期间彼此邻近且彼此紧邻,并且其中每个配合条31在所述吸收材料的转移期间邻近且紧邻凸起条21。
本发明也提供了使用本发明的所述设备1的方法、和/或制备吸收结构的方法,所述吸收结构具有纵向尺寸和横向尺寸以及高度尺寸,并且包括支撑片材200和其上的吸收材料100的吸收层和其中的一个或多个基本上无吸收材料的通道,所述方法包括以下步骤:
a)提供喂料机60,所述喂料机用于将所述吸收材料100喂送至第一移动的环状表面;
b)提供转移装置,所述转移装置用于将支撑片材200转移至第二移动的环状表面;
c)提供第一移动的环状表面20,其具有一个或多个吸收层形成贮存器25,所述贮存器具有纵向尺寸和平均长度、与其垂直的横向尺寸和平均宽度、和与它们两者均垂直的深度尺寸和平均深度、以及用于在其中容纳所述吸收材料100的空隙体积,所述贮存器包括一个或多个基本上纵向延伸的凸起条21,所述凸起条各自具有平均宽度W和平均长度L,所述平均宽度为贮存器的平均宽度的至少5%,并且所述平均长度为贮存器的平均纵向尺寸的至少5%且至多80%;所述贮存器用于将所述吸收材料100转移至与其邻近且接近的所述第二移动的环状表面30;
d)提供第二移动的环状表面30,其具有包括一个或多个透气的或部分地透气的储槽33的外壳,所述储槽用于在其上或在其中容纳所述支撑片材200,它们具有容纳区域且具有一个或多个基本上纵向延伸的配合条31,所述配合条可为不透气的,并且各自具有平均宽度W’,所述平均宽度为0.5×W至1.2×W,并且各自具有平均长度L’,所述平均长度为约0.8×L至1.2×L,被提供为贮存器的纵向尺寸的至多90%,
其中所述外壳任选地连接至一个或多个辅助真空系统,所述真空系统用于促进对支撑片材200和/或其上的所述吸收材料100的保持,并且
其中在会合点,所述第一移动的环状表面20和所述第二表面30/外壳在所述吸收材料100的转移期间至少部分地彼此邻近且彼此紧邻,并且在所述吸收材料的转移期间使得每个配合条31基本上完全邻近且紧邻凸起条21;
e)用所述喂料机60将吸收材料100喂送至所述第一移动的环状表面,喂送到至少其所述贮存器25中;
f)任选地,移除所述凸起条21上的任何吸收材料100;
g)同时地,将所述支撑片材200转移至所述第二移动的环状表面,转移到所述储槽33上或其中;
h)在所述会合点,选择性地仅用所述第一移动的环状表面20将所述吸收材料100转移至支撑片材200的如下所述部分,所述部分处在所述储槽33的所述容纳区域上或其中。
所述贮存器25可由大量沟槽和/或腔体22形成,它们具有用于在其中容纳所述吸收材料100的空隙体积。在一些实施例中,(每个)条的平均宽度W为任选地至少6mm,或例如至少7mm,和/或相应贮存器的平均宽度的至少7%,或例如至少10%。
所述沟槽和/或腔体22可各自例如具有至少3mm的横向上的最大尺寸,并且其中直接相邻的腔体22和/或沟槽之间的基本上横向尺寸上的最短距离小于5mm。直接邻近凸起条21的腔体22和/或沟槽可具有超过它们的相邻腔体22或沟槽中的一个或多个或全部的体积的体积,所述相邻腔体或沟槽不直接邻近所述条或另一个条(因此从某个条上进一步移除)。
所述第一移动的环状表面的贮存器25可为至少部分地透气的,并且所述第一移动的环状表面20可具有包括所述贮存器的圆柱形表面,所述圆柱形表面可旋转地围绕定子移动,所述定子包括真空室28(和任选地吹泄室29,从而刚好在会合点之前将加压的空气通过贮存器吹送到所述吸收材料上);所述第二移动的表面的外壳可为圆筒,所述圆筒可旋转地围绕定子移动,所述定子包括连接至所述辅助真空系统的辅助真空室38(和任选地吹泄室39以将加压的空气通过储槽吹送到所述吸收结构上以促进从第二移动的环状表面上移除。)
所述储槽33还可包括大量基本上纵向延伸的杆36,它们在横向上彼此间隔开,例如,每个杆具有至少0.3mm的最大横向尺寸,并且相邻杆36之间的横向尺寸上的最小距离为至少1mm,并且所述杆36各自具有至少1mm的平均高度尺寸,任选地所述杆36和所述配合条31处在外壳的相同平面中。
设备1可包括一个或多个如本文所述的粘合剂涂覆单元50;51。所述粘合剂涂覆能够有益地固定所述吸收材料,从而确保所述通道在使用中基本上永久保持和/或帮助支撑材料附着到放置在所述通道中的所述吸收层上的另外的材料。该方法可包括附加步骤i):
i)1)向在步骤g)中产生的所述吸收结构上涂覆粘合剂材料(即第一粘合剂材料);和/或
i)2)在步骤f之前,或与其同时地,但在任何情况下均在步骤h)之前,向所述支撑片材200上涂覆粘合剂材料(即第二粘合剂材料)。
步骤i)1)可涉及将纤维形式的所述第一粘合剂材料喷涂到所述吸收层或其一部分上,例如基本上连续地喷涂,因此其也存在于所述通道中。
步骤i)2)可涉及槽式涂布或喷涂支撑片材200,连续地涂布,或例如以对应于通道图案的图案涂布。
在本文的一些优选的实施例中,设备1可具有包括凸起压力图案71的压力辊70,所述凸起压力图案基本上对应于所述配合条31和/或通道的图案,所述图案用于择性地在(仅)对应于所述通道的区域中接触所述吸收结构的支撑片材200和/或下文所述的另外的材料。
所述第二移动的表面的所述储槽33可具有第一平均宽度尺寸,并且所述储槽33上的所述支撑片材200或其所述部分具有第二平均宽度尺寸,并且所述第一平均宽度尺寸与所述第二平均宽度尺寸的比率为至少1:1.2。
通过使用本文的方法和设备1,其中在吸收材料100转移至支撑片材200期间凸起部分和配合条31在所述储槽33上例如在所述配合条31上基本上相配合,吸收结构可具有沉积在如下层上的所述吸收材料100,所述层在其中具有基本上无吸收材料的通道;吸收层可呈吸收材料100的条的形式,所述条在其中或在它们之间具有不含吸收材料的条(例如所述支撑片材200的冠部);在本文的一些实施例中,支撑片材200被成形为相邻条之间和/或如下文所述可存在的相邻杆36之间的起伏部,并且本文的方法和设备1使得吸收材料100被沉积在所述起伏部中。
如上所述,支撑片材200可被转移至所述第二移动的环状表面30使得其形成起伏部和冠部。然后,当从所述第二移动的环状表面上移除支撑片材200时,支撑片材200被牵拉成基本上平坦的,从而导致如下吸收结构,所述吸收结构具有基本上不包括吸收材料的基本上纵向延伸的条(所述条对应于所述材料的冠部)。
本发明也涉及可通过本文的方法或用本文的设备获得的吸收结构、芯、和包括这种结构或芯的吸收制品诸如护垫或具体地尿布。
应当理解,除非另外指明,以上和以下描述等同地适用于本发明的方法和设备1、以及用其获得的吸收结构。
附图说明
图1A为本文的第一移动的环状表面20的贮存器25的顶视图。
图1B为本文的第一移动的环状表面20的一种可供选择的贮存器25的顶视图。
图2为本公开的或用于本发明的方法的设备1的侧视图。
图3为本公开的或用于本发明的方法的设备1的局部透视图。
图4为本公开的或用于本发明的一种可供选择的方法的一种可供选择的设备1的局部透视图。
图5为本公开的设备1的或任选地用于本发明的方法的任选元件的局部透视图。
具体实施方式
如上文所概述,本发明涵盖了一种制备适用于吸收制品的吸收结构的方法和设备1,所述吸收结构包括吸收材料,任选地至少或仅粒状超吸收聚合物材料、和优选的吸收结构。在以下定义之后,本文进一步描述了此类方法和设备1的实施例以及所得吸收结构和吸收制品。
定义
“吸收结构”是指一种具有纵向尺寸和与其垂直且垂直于高度尺寸的横向尺寸的三维结构,并且其包括至少一种吸收材料100和支撑片材200,并且适用于吸收制品。
“吸收层”是指一种通过将吸收材料100沉积到支撑片材200上而形成的三维的吸收材料层。
“吸收材料”是指能够吸收并保持体液的材料或材料混合物;其通常包括或由“超吸收聚合物材料”组成。“超吸收聚合物材料”(也称为“吸收胶凝材料,”或“AGM”、或“超吸收剂,”)是指能够吸收如使用“离心保留容量”测试(Edana 441.2-02)测量的至少10倍(且通常至少15倍或至少20倍)于它们自身重量的含水的0.9%盐水溶液的聚合物材料,即具有至少10g/g且通常至少15g/g或至少20g/g的离心保留容量。
本文所用的“颗粒”是指呈颗粒形式以致在干燥状态时可流动的材料。
“吸收制品”是指吸收和容纳身体流出物的装置,更具体地讲是指与穿着者的身体紧贴或邻近放置以用于吸收和容纳由身体排放的各种流出物的装置。吸收制品可包括成人和婴儿尿布,包括裤诸如婴儿训练裤和成人失禁内衣、和女性卫生制品诸如卫生巾和卫生护垫和成人失禁护垫、以及胸垫、护理垫、围兜、伤口敷料产品等。吸收制品还可包括地板清洁制品、食品工业制品等。如本文所用,术语“体液”或“身体流出物”包括但不限于尿液、血液、阴道排出物、乳汁、汗液和粪便。
“尿布”是指一般被婴儿和失禁患者围绕下体穿着以便环绕穿着者的腰部和腿部并且特别适于接收和容纳尿液和粪便的吸收制品。
如本文所用,“裤”或“训练裤”是指为婴儿或成人穿着者设计的具有腰部开口和腿部开口的尿布。通过将穿着者的腿伸入腿部开口并将裤提拉到围绕穿着者下体的适当位置,可将裤穿到使用者身上的适当位置。可通过任何适当的技术预成形裤装,其包括但不限于使用可重复扣紧和/或非可重复扣紧粘结物(例如,接缝、焊接、粘合剂、胶粘剂粘结、紧固件等)将所述制品的部分接合在一起。沿制品圆周的任何地方可对裤预成形(例如,侧扣紧、前腰区扣紧)。尽管本文使用的是术语“短裤”或“裤”,但裤通常也称为“闭合尿布”、“预紧固尿布”、“套穿尿布”、“训练裤”、和“尿布裤”。合适的裤公开于以下专利中:1993年9月21日授予Hasse等人的美国专利5,246,433;1996年10月29日授予Buell等人的美国专利5,569,234;2000年9月19日授予Ashton的美国专利6,120,487;2000年9月19日授予Johnson等人的美国专利6,120,489;1990年7月10日授予Van Gompel等人的美国专利4,940,464;1992年3月3日授予Nomura等人的美国专利5,092,861;提交于2002年6月13日的名称为“Highly Flexible And Low Deformation Fastening Device”的美国专利公布2003/0233082 A1;1999年4月27日授予Kline等人的美国专利5,897,545;1999年9月28日授予Kline等人的美国专利5,957,908。
“非织造材料”为由定向或任意取向的纤维通过摩擦和/或粘合和/或粘着而粘结成的、或通过湿磨法而毡化成的人造片、纤维网或毛层,不包括纸张和通过织造、编织、簇成、缝编而合并束缚的纱或长丝产品,不考虑是否另外缝过。这些纤维可具有天然的或人造的来源,并且可为短纤维或连续长丝或为就地形成的纤维。可商购获得的纤维具有在小于约0.001mm至大于约0.2mm范围内的直径,并且它们呈现为若干种不同的形式:短纤维(称作化学短纤维或短切纤维)、连续单纤维(长丝或单丝)、无捻连续长丝束(丝束)、和加捻连续长丝束(纱线)。非织造织物可通过许多方法诸如熔喷法、纺粘法、溶液纺丝、静电纺纱和粗梳法来形成。非织造织物的基重通常表示为克/平方米(gsm)。
“基本上不含纤维素”在本文中用来描述包含按重量计小于5%的纤维素纤维的制品诸如吸收层结构或芯。
“厚度”和“高度”在本文中可互换使用。
本文的吸收结构及其吸收层、以及储槽33和贮存器25各自具有纵向尺寸和平均长度,并且这可对应于加工方向(MD;和与其垂直的横向尺寸和平均宽度,这可对应于横向(CD);以及前区、后区和中心区,它们各自分别为该结构层的平均长度的1/3,并且各自具有全宽度。它们各自具有延伸其全长的纵向边缘和边缘区,如下文所详述。
第一移动的环状表面,例如印刷辊
吸收材料100由第一移动的环状表面20递送给支撑片材200,所述第一移动的环状表面邻近且紧邻所述第二移动的环状表面放置,例如基本上在所述表面的上方。吸收材料100可基本上连续地沉积。其中吸收材料100离开第一移动的环状表面20并转移至所述第二移动的环状表面30的点或区域在本文中称作会合点;并且在该点或区域,凸起条21例如每个凸起条与配合条31配合,例如不直接接触。
喂料机60可将吸收材料100递送至所述第一移动的环状表面。诸如喂料机60能够包含吸收材料100并且让其流动至所述第二移动的环状表面上的支撑片材200,例如连续地流动。喂料机60可为具有用以保持材料的容器部分的(例如固定式)料斗,所述容器部分例如具有至少1000cm3的体积;并且其可具有引导部分例如管形部分,所述管形部分将材料从容器部分引导至第一移动的环状表面。
第一移动的环状表面20可为旋转辊或转筒,如例如图2,3和4所示。第一移动的环状表面20的半径可取决于所生产的是什么吸收结构,例如什么尺寸,以及例如第一移动的环状表面例如印刷辊或转筒的每次循环生产出了多少结构。例如,转筒/印刷辊可具有至少40mm,或至少50mm的半径;其可为例如至多300mm,或至多200mm。在一些实施例中,第一移动的表面的半径小于第二移动的环状表面的半径的50%。
第一移动的环状表面20可具有任何合适的宽度,但具有例如(基本上)对应于所要生产的吸收结构的宽度的宽度(例如在CD上,从而垂直于MD);这例如为至少40mm,或至少60mm,或例如至多400mm,或至多200mm。
所述第一移动的环状表面20可具有一个或多个贮存器,所述贮存器具有用于在其中容纳所述吸收材料100的某种体积,并且将其传送并随后沉积到第二移动的环状表面上的所述支撑片材200上。
每个贮存器25通常对应于旨在生产的吸收结构,如适用于吸收制品的吸收结构。支撑片材200可为材料纤维网,因此本文的方法和设备1能够因此用来生产此类吸收结构的纤维网,所述纤维网随后被分离成各个结构。
贮存器25为至少部分地透气的。其通常具有用来容纳所述吸收材料的区域,并且该区域基本上与真空系统空气连通,即透气的。
如例如图1A和1B和图3所示,贮存器25具有一个或多个凸起条21(它们不具有空隙体积),并且当第一移动的环状表面20邻近所述第二移动的环状表面30与所述配合条31上的所述支撑片材200一起移动(旋转)时,所述凸起条21与与所述配合条31基本上重合地配合(在本文中称作:配合)。然后,吸收材料100被选择性地沉积在基底材料上(在其不处在所述配合条31上的部分上),从而在支撑片材200上形成具有基本上不含吸收材料的通道(条)的吸收层。贮存器25通常具有与第二移动的环状表面的配合条31的数目相同数目的凸起条21。
所述条21可不与真空系统保持空气连通,所述真空系统与所述第一移动的环状表面保持空气连通,即凸起条21可为不透气的。它们可因此具有无孔的表面。具有用于容纳吸收材料的空隙体积的贮存器25的剩余区域(因此不包括凸起条21)可与真空系统保持空气连通,例如具有与真空系统保持空气连通的孔。
贮存器25具有周边边缘、和周边边缘区,包括相对的纵向边缘和边缘区、和横向前边缘和前边缘区、以及横向后边缘和后边缘区。所述前边缘区和后边缘区(延伸完整的横向尺寸)各自可例如具有纵向尺寸,所述纵向尺寸为贮存器的平均纵向尺寸的约5%至约20%,或至15%,或至10%。所述纵向边缘区各自可延伸贮存器25的长度,并且可具有平均横向尺寸,所述平均横向尺寸为贮存器的总平均横向尺寸的例如约5%至约20%,或通常至约15%或至约10%。在本文的一些实施例中,所述凸起条不存在于任何所述边缘区中。
除此之外或作为另外一种选择,贮存器25可包括前区、后区和它们之间的中心区,如下文所详述。中心区可为例如贮存器的中心1/3,其延伸全横向尺寸。在某种实施例中,凸起条21仅存在于前区中;作为另外一种选择,在一些实施例中,凸起条21仅或至少存在于中心区中;作为另外一种选择,在一些实施例中,凸起条21存在于中心区和前区和任选地后区中。作为另外一种选择或除此之外,优选的是,一个或多个凸起条21存在于中心区和前区中。为了使整体吸收结构提供改善的液体传送性能和更有效的吸收性,可优选地至少在中心区中具有所述凸起条并且任选地也至少在前区中延伸。
在任何此类情况下,可优选的是,上述边缘区均不包括此类凸起条21。
如例如图3和4所示,在本文的吸收材料100的转移期间,即在吸收材料100转移至所述第二移动的环状表面期间,凸起条21会合(并且因此配合于)配合条31,所述凸起条21基本上重叠所述配合条。这通常适用于每个配合凸起条21和配合条。换句话讲,每个凸起条21通常均具有对应的配合条。应当理解,凸起条21和配合条31在吸收材料100转移期间(支撑片材200材料处在它们之间)不直接接触。支撑片材200可或可不接触凸起条。
以下说明相关于其对应的配合条描述了凸起条,但可适用于每个凸起条。
凸起条21和对应的配合条31可具有相同的尺寸和形状和表面区域,并且从而是完全配合的。凸起条21可具有的表面区域略微超过对应的配合条的表面区域。因此,配合条31和对应的凸起条21通常因而仍然具有基本上相同的总体形状。上文和下文描述了优选的长度比率和尺寸。
在一些实施例中,可优选地(此外或作为对上述方案的可供选择的替代方案),配合条31可具有平均宽度W’,所述平均宽度小于凸起条的平均宽度W,但在一些实施例中,W’不超过W,如上文和下文所详述。
W通常为至少5mm,或例如至少6mm。或例如至少7mm或例如至少8mm,并且例如小于40mm或更小,或小于30mm或更小,或例如20mm或更小。
凸起条21通常延伸贮存器的纵向尺寸的至多80%或至多70%。
因此,凸起条21的平均长度可为贮存器的平均长度的80%或更小,或例如至多70%。
凸起条21为基本上纵向延伸的。它们可为直的或例如弯曲的,具有如本文所述的曲率半径,或为成角度的,如下文所述。
贮存器25可具有例如位于贮存器的纵向轴线的各一侧上的至少两个凸起条21,并且它们互为镜像。该例如示出于图1A中。
贮存器25也可例如具有3或4,或例如5或例如6个凸起条21。它们中的两个或更多个可彼此平行。贮存器25可具有例如3,或4,或5,或6个凸起条21,它们至少存在于中心区中,并且任选地在前区中和任选地在后区中延伸;它们可彼此平行和/或它们可使得位于贮存器25的纵向轴线的一个纵向侧上的那些成为位于相对纵向侧上的那些的镜像。该例如示出于图1B中。
贮存器25可在前区中具有例如两个凸起条21,它们各自位于纵向轴线的两侧上,并且在其中互为镜像;和在至少中心区中延伸的两个凸起条21,它们各自位于纵向轴线的两侧上,并且在其中互为镜像;和任选地后区中的两个凸起条21,它们各自位于纵向轴线的两侧上,并且在其中互为镜像。
在一些实施例中,可不存在与贮存器的纵向轴线重合,但仅位于其两侧上的凸起条21。这可帮助确保吸收结构在使用期间形成为U形而不是V形,这可导致更好的贴合性和/或吸收性。
在一些实施例中,至少两个凸起条21延伸,并且因此具有平均长度,所述平均长度为所述贮存器的平均长度的至少50%。在一些实施例中,存在至少附加的两个凸起条21,它们具有平均长度,所述平均长度为贮存器的平均长度的小于50%。
凸起条在X-Z平面(X为横向尺寸;Z为高度尺寸)中的横截面可为任何形式。其可具有例如正方形、矩形、或六边形横截面。然而,顶部表面通常为平坦的,即在贮存器的X-Y平面中。
本文的所述凸起条(中的每个)通常为基本上纵向延伸的,这意味着其纵向延伸量超过其横向延伸量。这包括完全纵向延伸的且直的凸起条;其包括与贮存器的纵向轴线成一角度的凸起条,前提条件是所述角度为至多30°;这可包括可略微弯曲的(如下文所述)的凸起条;这包括可为波状的凸起条;这包括可构成角度的凸起条,前提条件是所述角度为至少120°;并且前提条件是任何此类凸起条在纵向尺寸上的延伸量均超过在横向尺寸上的延伸量,例如任何此类凸起条在纵向尺寸上与在横向尺寸上相比延伸得多出至少50%或至少100%。
在一些实施例中,凸起条21中的一个或多个可为略微弯曲的,例如具有单一曲率,如例如示出于附图中,具有至少等于贮存器的平均横向尺寸的曲率半径;和/或具有符合例如最近纵向侧边缘的轮廓的曲率。在一些实施例中,可优选的是,凸起条21为凹入的,其中条的纵向中心比端点更靠近贮存器25的纵向轴线,并且其中曲率半径为贮存器的平均横向尺寸的至少1倍,或任选地至少1.5倍。
在一些实施例中,除了所述凸起条21或多个条以外,贮存器25还包括基本上在纵向尺寸上延伸的大量沟槽或基本上在纵向尺寸上延伸的大量腔体行,所述沟槽或腔体用于在其中容纳吸收材料100,在它们之间具有所述凸起条。
在本文的一些实施例中,所述凸起条21具有轮廓,并且邻近其任一纵向侧存在至少一个此类第一行或沟槽、和与其邻近的第二行和/或沟槽,并且所述第二行和/或沟槽可具有小于所述第一行或沟槽的总体积的总体积。因此,直接邻近某个通道(在本文的吸收结构中),吸收材料100可具有比在另外的邻近区中更高的基重。
在本文的一些实施例中,相邻沟槽或行可彼此分隔开,但相邻行的相邻腔体22之间或相邻沟槽之间的间隔距离(在横向尺寸上)小于5mm,并且通常为4mm或更小,或3.5mm或更小,或例如3mm或更小。
此类沟槽和/或行可在吸收材料100的转移期间配合于(重合于)基底材料的如下部分,所述部分位于相邻杆36(如果存在)之间,并且如下文所述基本上在纵向尺寸上延伸;并且因此相邻沟槽和/或行之间的区域可在吸收材料100的转移期间配合(重合)于位于所述杆36(如果存在)上的支撑片材200的部分(条),如下文所述。
腔体22可具有任何尺寸和形状,包括立方形、矩形、圆柱形、半球形、圆锥形、或任何其它形状。它们可为任何合适数目的腔体,但例如至少20或至少50个。
腔体22可作为相同的腔体22存在,或它们可在尺寸或形状上不相同。确切的图案、尺寸等将取决于要形成的所需结构,但可例如也取决于吸收材料的粒度、加工速度等。
在一些实施例中,第一移动的环状表面20贮存器25的表面区域的至少30%包括所述腔体,任选地至少40%;并且任选地至多60%或至多55%。
介于腔体22的中心点(所述中心点在第一移动的环状表面的外表面的平面中)和相邻腔体22的中心点(在腔体22行中)之间的纵向尺寸上的距离可例如为至少3mm,或至少4mm,或至少6mm,或例如至多40mm或至多30mm或至多20mm。这可应用于纵向尺寸上的相邻腔体22之间的所有此类距离,或这可为所有此类距离的平均值。
介于腔体22或沟槽的中心点(所述中心点在第一移动的环状表面的外表面的平面中)和相邻腔体22或沟槽的中心点(在横向腔体列中)之间的横向尺寸上的距离也可例如为如上值。在一些实施例中,腔体22列的两个相邻腔体22之间或相邻沟槽之间的横向尺寸上的最短距离为4.0mm或更小。
在一些实施例中,腔体22的纵向尺寸可为(按所有腔体22平均和/或就每个腔体而言;所述尺寸在第一移动的环状表面的外表面上测量)至少1mm,或至少2mm,或至少4mm,并且例如至多20mm或至多15mm。横向尺寸可在与如上所述的相同范围内,或其可甚至与一个或多个或每个腔体的纵向尺寸相同。
所述行或沟槽可基本上彼此平行且等间隔地延伸,和/或所述列可基本上彼此平行且等间隔地延伸。
在一些实施例中,这些行或沟槽中的两个或更多个或它们的一部分可呈凸起条的纵向侧边缘的形式,它们邻近(并且因此通常平行)于所述凸起条,例如具有相同的曲率、角度等,如本文所述。
贮存器、腔体22或沟槽可具有任何合适的深度尺寸,并且其可取决于例如第一移动的环状表面20的高度(例如半径),所期望生产的结构的厚度、材料的粒度等。贮存器,腔体22或沟槽的最大深度和/或平均最大深度(按所有腔体22和/或沟槽的所有最大深度平均)可为例如至少1mm,或至少1.5mm,或例如2mm或更大,以及例如至多20mm,或至多15mm,或在本文的一些实施例中,至多10mm,或至5mm,或至4mm。
根据本文的一些实施例,腔体22在纵向尺寸上和在横向尺寸上可具有2至8mm或3mm至7mm的平均尺寸;并且腔体22可具有例如1.5mm至4mm的最大深度和/或平均最大深度。
可使用刮刀或刮粉刀来移除多余的吸收材料。多余的材料可从贮存器25上移除并且被回收到例如料斗中。
一种将材料保持在贮存器25(或其沟槽或腔体)中的可能性可为真空,结合贮存器或沟槽或其腔体22的(底部)中的抽吸孔,所述真空被施加到第一移动的环状表面例如印刷辊或转筒的内侧上,因此将真空抽吸施加到吸收材料上。所述真空例如刚好在会合点之前或在会合点处被释放。所述真空可为任何真空压力,例如至少10kPa,或至少20kPa。
所述真空可通过在所述第一移动的环状表面20中(例如在其内部)提供一个或多个真空室28来提供,其中所述真空能够被施加、减小、增加、和释放(断开),这取决于其在所述工艺/设备中的位置。
靠近或在会合点处,可通过提供空气室29将附加空气压力施加到所述吸收材料100上,从而确保材料流动至所述第二移动的环状表面上的支撑片材200。
第二移动的环状表面30
本文的方法和设备1布置了第二移动的环状表面30,其如同第一移动的环状表面一样在加工方向(MD)上移动。其具有包括一个或多个成形储槽33的外壳,所述成形储槽用于在其上或在其中容纳支撑片材200(其可为材料纤维网,如下文所述,或为放置在储槽33上的各个片材)。以下内容描述了单一储槽33,但其可适用于第二移动的环状表面的外壳的每个储槽33。
每个储槽33通常对应于旨在生产的吸收结构,如适用于吸收制品的吸收结构。支撑片材200可为材料纤维网,因此本文的方法和设备1能够因此用来生产此类吸收结构的纤维网,所述纤维网随后被分离成各个结构。
第二移动的环状表面30可具有或为旋转表面,诸如旋转的例如圆柱形转筒。可能的情况是外壳移动,例如围绕固定式内室例如所谓的定子旋转。
外壳和储槽33具有平均横向尺寸,所述平均横向尺寸可例如为横向(CD)尺寸;并且储槽33具有与其垂直的平均纵向尺寸,所述平均纵向尺寸可例如为加工方向尺寸。
储槽33为至少部分地透气的。其通常具有用来容纳所述吸收材料的区域,并且该区域基本上与真空系统空气连通,即透气的。
储槽33具有一个或多个,任选地至少2个基本上配合条31,它们基本上配合(重合)于所述凸起部分(但不直接接触它们),它们在本文中称作配合条31。所述配合条可不与所述真空系统保持空气连通,即共可为不透气的。它们可因此在储槽33的平面中具有无孔的表面。
储槽33通常具有与第一移动的环状表面的贮存器25的凸起条21的数目相同数目的配合条31。
在本文的吸收材料100的转移期间,即在吸收材料100转移至所述第二移动的环状表面期间,凸起条21重合(并且因此配合于)配合条31,所述凸起条21基本上重叠所述配合条。这通常适用于每个配合凸起条21和配合条。换句话讲,每个凸起条21通常均具有对应的配合条。应当理解,凸起条21和配合条31在吸收材料100转移期间(支撑片材200材料处在它们之间)不直接接触。支撑片材200可或可不接触凸起条21;通常其不接触所述凸起条。
储槽33具有周边边缘、和周边边缘区,包括相对的纵向边缘和边缘区、和横向前边缘和前边缘区、以及横向后边缘和后边缘区。所述前边缘区和后边缘区(延伸完整的横向尺寸)各自可例如具有纵向尺寸,所述纵向尺寸为储槽33的平均纵向尺寸的约5%至约20%,或至15%,或至10%。所述纵向边缘区各自可延伸所述长度,并且可具有的平均横向尺寸为储槽33的平均横向尺寸的例如约5%至约20%,或通常至约15%或至约10%。在一些实施例中,配合条31不存在于任何这些边缘区中。
除此之外或作为另外一种选择,储槽33可包括前区、后区和它们之间的中心区域,如下文所详述。中心区可为例如储槽33的中心1/3,其延伸全横向尺寸。在某种实施例中,配合条仅存在于前区中;作为另外一种选择,在一些实施例中,配合条仅或至少存在于中心区中;作为另外一种选择,在一些实施例中,配合条存在于中心区和前区和任选地后区中。作为另外一种选择或除此之外,优选的情况是一个或多个配合条31存在于中心区和前区中。为了使整体吸收结构提供改善的液体传送性能和更有效的吸收性,可优选地至少在中心区中具有所述配合条并且任选地也至少在前区中延伸。
在任何此类情况下,可优选的是,上述边缘区均不包括此类配合条31。
以下内容相关于其对应的凸起条描述了配合条,但可适用于且任选地适用于每个配合条31(及其对应的凸起条)。
配合条31和对应的凸起条21可具有相同的尺寸和形状和表面区域,从而是完全配合的。凸起条21可具有的表面区域略微超过对应的配合条的表面区域。因此,配合条31和对应的凸起条21通常因而仍然具有基本上相同的总体形状。
在一些实施例中,可优选的是,配合条31的至少平均长度和对应的配合步骤的平均长度为基本上相同的,所述差值例如为至多20%,或例如凸起条21具有的平均长度超过对应的配合条的平均长度至多10%。因此配合条31的平均长度L’为约0.8×L至1.2×L,或例如0.9×L至1.1×L,或至1×L,(L为对应的凸起条的平均长度)。
在一些实施例中,可优选的是(此外或作为对上述方案的可供选择的替代方案),配合条31可具有的平均宽度W’小于凸起条的平均宽度W,但在一些实施例中,W’不超过W。因此,W’为0.5×W至1.2×W,或例如0.66×W,或例如0.8×W,至例如1×W,或例如至0.9×W。
W’可例如为至少2.5mm,或例如至少4mm或例如至少6mm。W’可小于20mm或更小,或小于15mm或更小,或例如10mm或更小。
因此,在一些实施例中,凸起条21在吸收材料100的转移期间完全重叠对应的配合条31,但配合条31不基本上重叠对应的凸起条。这可帮助将所沉积的吸收材料100略微铺展在所述支撑片材200上,从而确保其更匀质地沉积在所述支撑片材200上。
每个配合条31通常延伸储槽33的纵向尺寸的至多90%,或例如至多80%或至多70%。
因此,配合条31的平均长度可为储槽33的平均长度的90%或更小,或例如至多80%或至多70%。
储槽33可具有例如至少两个配合条31,它们各自位于储槽33的纵向轴线的两侧上,并且互为镜像。它们可为直的或例如弯曲的,具有如本文所述的曲率半径。
储槽33也可例如具有3或4,或例如5或例如6个配合条31。它们中的两个或更多个可彼此平行。
储槽33可具有例如3,或4,或5,或6个配合条31,它们至少存在于中心区中,并且任选地在前区和任选地后区中延伸;它们可彼此平行和/或它们可使得位于储槽33的纵向轴线的一个纵向侧上的那些成为位于相对纵向侧上的那些的镜像。
储槽33可在前区中具有例如两个配合条31,它们各自位于纵向轴线的两侧上,并且在其中互为镜像;和在至少中心区中延伸的两个配合条31,它们各自位于纵向轴线的两侧上,并且在其中互为镜像;和任选地后区中的两个配合条31,它们各自位于纵向轴线的两侧上,并且在其中互为镜像。
在一些实施例中,可不存在与储槽33的纵向轴线重合,但仅位于其两侧上的配合条31。这可帮助确保吸收结构在使用期间形成为U形而不是V形,这可导致更好的贴合性和/或吸收性。
在一些实施例中,至少两个配合条31延伸,并且因此具有平均长度(纵向尺寸),所述平均长度为所述储槽33的平均长度的至少50%。在一些实施例中,存在至少附加的两个配合条31,它们具有平均长度,所述平均长度为储槽33的平均长度的小于50%。
配合条31在X-Z平面中的横截面可为任何形式。其可具有例如正方形、矩形、或六边形横截面。然而,支撑支撑片材200的顶部表面通常为平坦的,即在储槽33的X-Y平面中。
本文的所述配合条31(中的每个)通常为基本上纵向延伸的,这意味着其纵向延伸量超过其横向延伸量。这包括完全纵向延伸的且直的配合条31;其包括与贮存器的纵向轴线成一角度的配合条,前提条件是所述角度为至多30°;这可包括可略微弯曲的(如下文所述)配合条;这包括可为波状的配合条;这包括可构成角度的配合条,前提条件是所述角度为至少120°;并且前提条件是任何此类配合条在纵向尺寸上的延伸量均超过在横向尺寸上的延伸量,例如任何此类配合条在纵向尺寸上与在横向尺寸上相比延伸得多出至少50%或至少100%。
在一些实施例中,配合条31中的一个或多个可为略微弯曲的,例如具有单一曲率,具有至少等于贮存器的平均横向尺寸的曲率半径;和/或具有符合例如最近纵向侧边缘的轮廓的曲率。在一些实施例中,可优选的是,配合条31为凹入的,其中条的纵向中心比端点更靠近贮存器25的纵向轴线,并且其中曲率半径为贮存器的平均横向尺寸的至少1倍,或任选地至少1.5倍。
储槽33的除了所述配合条31之外的区域可例如为网状材料,所述网状材料因此具有孔并且与所述真空系统38保持空气连通,例如为透气的。
作为另外一种选择,除了配合条31之外的储槽33的表面区域可构成基本上横向上的细支撑件,所述支撑件用于支撑支撑片材200,如例如图3所示,即通常在纵向上具有最大尺寸,所述最大尺寸可小于邻近配合条的平均宽度尺寸;和/或例如至多4mm,或例如至多3mm。
如例如图4所示,储槽33还可包括大量基本上纵向延伸的杆36,它们彼此间隔开,并且通常在横向上与相邻配合条间隔开。此类杆36因而可部分地形成所述储槽33的最外表面,使得支撑片材200被所述杆36和所述配合条31容纳和支撑。
因而在杆36之间,或在杆36和相邻配合条之间存在间隔,其中支撑片材200可不直接由储槽33的配合条31或杆36支撑。
储槽33可在储槽33的基本上整个长度(纵向尺寸)上,或例如在除了前边缘区和/或后边缘区之外的整个长度上包括所述杆36;或在本文的一些实施例中,杆36可仅存在于所述中心区中;在一些实施例中,杆36可存在于前区和任选地中心区中,但不存在于后区中;在一些实施例中,杆36可存在于后区和任选地中心区中,但不存在于前区中。
储槽33可在所述储槽33的整个宽度(纵向尺寸)上,或例如在整个宽度(除了在所述纵向边缘区中之外)包括此类杆36。
在任何这些实施例中,不包括所述杆36的区或区域在本文中称作无杆区或无杆区域;在所述无杆区域或无杆区中,支撑片材200随后被直接沉积到所述配合条31和任选地所述内格栅(例如网状材料)上。
所述储槽33可在不包括所述杆36的所述区域或区中具有比所述杆36更高的摩擦。这能够帮助确保在低摩擦区中的杆36之间或杆36和配合条31之间牵拉支撑片材200,并且在高摩擦区中较少牵拉或根本不牵拉所述支撑片材。例如,储槽33可由更高摩擦的材料(例如具有不太平坦表面的材料)制成,或可在不包括所述杆36的那些区或区域中用摩擦增强剂处理;或例如具有杆36的所述区或区域或仅所述杆36可由较低摩擦的材料制成,或用摩擦减弱剂处理。
杆36(如果存在)为基本上纵向延伸的,这对于本发明的目的来讲意味着与上文对于配合条的限定相同。
杆36可为任何形状或形式。例如,其可在CD上具有正方形、矩形、圆形、椭圆形或六边形横截面。每个杆具有顶部部分(对于例如具有正方形或矩形横截面的杆36,其可为顶部表面)和相对的底部部分或表面。所述顶部部分或表面因而与支撑片材200接触;所述底部表面可至少部分地邻近(例如:位于其上)透气的内格栅。
在一些实施例中,可优选的是,杆为大致矩形的,具有任选地三角形的顶部部分。
相邻杆36或相邻杆36和配合条31之间的最小距离为例如(在横向尺寸上)至少2mm,或至少3mm,或至少5mm,或例如至少10mm。
两个或更多个杆36可彼此平行,使得平行的相邻杆36之间的间隔距离(在横向尺寸上)沿基本上整个长度为至少所述2mm。
因此,在相邻杆36之间或在杆和相邻配合条之间可存在空隙体积,并且所述空隙体积基本上在加工方向上延伸。该空隙体积能够用来在其中容纳支撑片材200以作为起伏部,并且随后任选地在其中容纳所述吸收材料100。
每个杆可具有最大横向尺寸,所述最大横向尺寸可为至少0.1mm,任选地至少0.3mm,或至少0.5mm,并且例如小于4mm,或小于2mm。
储槽33可例如具有至少2个此类杆36,或例如至少4个此类杆36,或例如至少5或至少7个此类杆36。
所述杆36可在纵向上为直的和/或它们可例如平行于相邻配合条。
在一些优选的实施例中,支撑片材200被沉积到所述配合条31和任选的杆36上,并且其在相邻配合条31和/或杆36之间弯曲,例如由于真空抽吸而弯曲,从而在相邻杆36和/或配合条31之间在所述片材中形成起伏部,并且形成被支撑在所述杆36/配合条31上(在所述顶部表面或顶部部分上)的冠部。(内格栅可控制/决定所述起伏部的尺寸(高度)。)
支撑片材200从转移装置诸如转移辊210被转移至所述第二移动的环状表面30并且被沉积到所述外壳/储槽33上。其可作为纤维网或作为各个片材被传送至外壳及其储槽33。支撑片材200可为非织造材料,如本文所详述。
随后,所述吸收材料100可被沉积到所述储槽33上的所述支撑片材200上,使得基本上无材料被沉积在位于配合条31上的支撑片材200的部分上。
吸收材料100可被沉积成使得其仅存在于位于相邻杆36和/或配合条31之间例如位于所述起伏部中的支撑片材200的部分(例如支撑片材200的条)上。因此,可使用特定的第一移动的表面,其具有特定的沟槽或腔体22,所述沟槽或腔体配合于所述起伏部并且如下文所述不配合于所述杆36。
作为另外一种选择或除此之外,所述真空还可使得其向或朝存在于相邻杆36和/或配合条31之间的支撑片材200的部分牵拉吸收材料100,例如牵拉到所述起伏部中。基本上无吸收材料100可例如存在于位于所述杆36上的支撑片材200上,(不存在于所述配合条31上,如上所述),例如存在于所述支撑片材200的所述冠部上。
作为另外一种选择或除此之外,可通过本领域已知的装置诸如刮刀或刮粉刀来移除被沉积到所述杆36上的支撑片材200的部分(例如所述冠部)上的吸收材料100。
作为另外一种选择或除此之外,支撑片材200还可包括粘合剂。例如所述粘合剂可存在于位于相邻杆和/或配合条31之间的所述支撑片材200的所述部分例如所述起伏部上。这可帮助吸收材料100附着在此类部分中,例如随着在所述起伏部上。因而支撑片材200可在加入吸收材料之前不包括粘合剂,所述粘合剂涂覆在由所述杆36和/或配合条31支撑的所述部分例如所述冠部上,使得较少或无吸收材料100在所述部分例如冠部中附着。
在一些实施例中,第二移动的环状表面30可例如具有至少1000个部件/分钟的速度和/或至少4.5m/s,或至少6m/s,或至少8m/s的速度。
吸收材料100
本文的吸收材料100任选地为可流动材料(在干燥状态中),诸如粒状材料;其可为粒状形式的任何材料,所述材料包括颗粒、薄片、纤维、球体、聚焦的颗粒和本领域已知的其它形式。
吸收材料100包括超吸收聚合物材料(例如颗粒),所述超吸收聚合物材料任选地与纤维素材料(包括例如纤维素、呈纤维形式的粉碎的木浆)组合。在一些实施例中,吸收材料100可包括按重量计至少60%,或至少70%的超吸收聚合物材料、和至多40%或至多30%的纤维素材料。在一些其它实施例,吸收层包括吸收材料100,所述吸收材料基本上由吸收聚合物材料例如颗粒组成,例如存在按重量计小于5%(的吸收材料)的纤维素材料;并且所述吸收层/吸收结构可不含纤维素材料。
在本文的一些实施例中,吸收材料例如粒状吸收材料包括至少(粒状)超吸收聚合物材料或基本上由或由(粒状)超吸收聚合物材料组成,所述超吸收聚合物材料在本文中称作SAP,并且也称为粒状吸收胶凝材料,即AGM。本文的粒状SAP可具有高吸附容量,例如具有例如至少20g/g,或30g/g的离心保留容量。上限可为例如至多150g/g,或至多100g/g。
粒状SAP可具有良好的液体渗透性,例如,具有至少10×10-7cm3s/g;或任选地至少30×10-7cm3.s/g,或至少50×10-7cm3s/g 10×10-7cm3s/g的SFC值,或可能具有至少100×10-7cm3s/g的渗透性SFC值,或至少120×10-7cm3sec/g的SFC。该SFC是渗透性的量度,并且孔隙率指示由如1996年10月8日公布的美国专利5,562,646(Goldman等人)所述的凝胶床的盐水流动传导率提供(然而其中使用的是0.9%NaCl溶液,而不是Jayco溶液)。上限可为例如至多350或至多250(×10-7cm3.s/g)。
在本文的一些实施例中,所述SAP的聚合物为内部交联的和/或表面交联的聚合物。
在本文的一些实施例中,吸收材料100包括聚丙烯酸/聚丙烯酸酯聚合物的颗粒或由聚丙烯酸/聚丙烯酸酯聚合物的颗粒组成,所述聚丙烯酸/聚丙烯酸酯聚合物例如具有60%至90%,或约75%的中和度,具有例如如本领域已知的钠抗衡离子;它们可为表面交联的和/或内部交联的聚丙烯酸/聚丙烯酸酯聚合物。
在本文的一些实施例中,吸收材料100呈颗粒形式,具有至多2mm,或介于50微米和2mm或至1mm之间,或任选地100或200或300或400或500μm,或至1000或至800或至700μm的质量中值粒度;所述质量中值粒度可例如通过例如EP-A-0691133中所述的方法来测量。在本发明的一些实施例中,所述材料呈颗粒形式,所述颗粒中按重量计至少80%为具有介于50μm和1200μm之间的尺寸且具有介于上述任何范围组合之间的质量中值粒度的颗粒。此外,或在本发明的另一个实施例中,所述颗粒为大致上球形的。在本发明的另一个或附加实施例中,吸收材料100具有相对窄范围的粒度,例如其中大部分(例如按重量计至少80%或任选地至少90%或甚至至少95%)的颗粒具有介于50μm和1000μm之间,任选地介于100μm和800μm之间,并且更任选地介于200μm和600μm之间的粒度。
本文的吸收材料100可有利地包括按重量计小于15%,或小于10%,或小于8%或小于5%的水。所述水含量可按Edana测试号ERT 430.1-99(1999年2月)来测定,其涉及将颗粒材料100在105摄氏度下干燥3小时,并且在干燥之后通过颗粒材料100的重量损失来测定含水量。
本文的粒状SAP可为如下SAP粒,它们为表面涂覆的或表面处理的(这不包括表面交联,其可为一种附加表面处理);此类涂覆和表面处理步骤是本领域熟知的,并且包括用一种或多种无机粉末(包括硅酸盐、磷酸盐)进行的表面处理和涂覆聚合材料(包括弹性体聚合材料或成膜聚合材料)。
支撑片材200
可用本发明的设备1和方法来生产的吸收结构包括用以容纳吸收材料的支撑片材200。该支撑片材200可为任何单个片材或纤维网片材料,具体地为纸材、膜、机织织物或非织造织物、或任何这些材料的层压体。
在本文的一些实施例中,支撑片材200为非织造织物,例如非织造纤维网,诸如梳理非织造织物、纺粘非织造织物或熔喷非织造织物,并且包括任何这些材料的非织造层压体。
这些纤维可具有天然的或人造的来源,并且可为短纤维或连续长丝或为就地形成的纤维。可商购获得的纤维具有通常在小于约0.001mm至大于约0.2mm范围内的直径,并且它们呈现为若干种不同的形式:短纤维(称作化学短纤维或短切纤维)、连续单纤维(长丝或单丝)、无捻连续长丝束(丝束)、和加捻连续长丝束(纱线)。所述纤维可为双组分纤维,例如具有片-芯排列,例如具有形成所述片和所述芯的不同的聚合物。非织造织物可通过许多方法诸如熔喷法、纺粘法、溶液纺丝、静电纺纱和粗梳法来形成。非织造织物的基重通常表示为克/平方米(gsm)。
本文的非织造材料可由亲水性纤维制成;“亲水性”描述纤维或纤维表面,它们可被沉积在这些纤维上的含水流体(例如含水体液)润湿。亲水性和可润湿性通常根据流体例如通过非织造织物的接触角和透湿时间来定义。在由Robert F.Gould编辑的名称为“Contact angle,wettability andadhesion”的American Chemical Society出版物(1964版权所有)中对此进行了详细的讨论。或者当流体和纤维或其表面之间的接触角小于90°时,或者当流体趋于在纤维表面上自发铺开时(两种情况通常共存),就说纤维或纤维表面被流体润湿(即亲水的)。相反,如果接触角大于90°并且流体不能在整个纤维表面上自发铺展,则纤维或纤维表面被认为是疏水的。
本文的支撑片材200可为透气的。因此可用于本文的薄膜可包括微孔。本文的非织造材料可为例如透气的。支撑片材200可具有例如40或50至300或至200m3/(m2×min)的透气率,所述透气率通过EDANA方法140-1-99(125Pa,38.3cm2)测定。作为另外一种选择,支撑片材200可具有更低的透气率,例如为非透气的,从而例如更好地滞留在包括真空的移动的表面上。
在优选的实施方式中,支撑片材200为例如SMS或SMMS类型的非织造层压体材料、非织造层压体纤维网。
为了容易地形成所述起伏部,支撑片材200可具有小于60gsm,或例如小于50gsm,例如5gsm至40gsm,或至30gsm的基重。
支撑片材200可具有例如超过20%,或例如超过100%,但例如不超过200%的横向延展性或纵向延展性。
在本文的一个实施例中,支撑片材200具有横向尺寸,所述横向尺寸超过储槽33的部分的横向尺寸例如至少10%,或例如at 20%或至少30%,并且例如至多约120%。
粘合剂涂覆单元50;51和方法步骤。
支撑片材200在转移至所述第二移动的环状表面之前可包括粘合剂。因此,本文的设备1可在所述第二移动的环状表面的上游和例如所述支撑材料转移装置例如辊的下游包括(第二)粘合剂涂覆单元51。本文的方法可因此包括这种粘合剂涂覆步骤。
该粘合剂可均匀地和/或连续地涂覆,从而促进吸收材料100的固定,并且随后其可帮助将支撑片材200附着到另外的材料,所述另外的材料可重叠吸收层,如下文所述。作为另外一种选择,其可按某种图案来涂覆。其可通过喷涂或例如通过选择性地槽式涂布来涂覆;设备1可因此包括具有图案的槽式涂布机。
粘合剂可涂覆在旨在容纳吸收材料的支撑片材200的那些部分上;因而其帮助将吸收材料100固定在其上(例如从而确保吸收材料100将基本上保持为所施加时那样(具有所述通道),任选地不仅在制造期间,而且也在储存和使用期间(至少在使用过程的一部分期间))。或作为另外一种选择,仅施加在旨在位于所述配合条31上的支撑片材200的那些部分上;因而其可帮助将支撑片材200附着到另外的材料,所述另外的材料可重叠吸收层,如下文所述。例如,可将其涂覆为基本上纵向条。
在一些实施例中,设备1可包括用以按某种图案将粘合剂涂覆到所述支撑片材200上的单元,所述图案例如配合条31的图案和任选地杆36(如果存在于)的图案。
任何合适的粘合剂均能够用于该目的,例如使用所谓的热熔融粘合剂。例如,能够使用可喷涂的热熔融粘合剂,诸如H.B.Fuller Co.(St.Paul,MN)的产品号HL-1620-B。
作为另外一种选择或除此之外,还可有益地向通过本文的设备1或方法生产的所述吸收结构上涂覆另外的固定作用粘合剂,例如以确保吸收材料100将保持基本上所施加的那样(具有所述通道),任选地不仅在制造期间,而且也在储存和使用期间(至少在使用过程的一部分期间)。然后,可紧接在将所述吸收材料100施加到所述支撑片材200上之后,将该固定作用粘合剂例如涂覆到所述吸收层上。
本文的设备1可因此具有另外的(第一)粘合剂涂覆单元50,例如在所述第二移动的环状表面的会合点的下游。该方法可具有对应的方法步骤。
该粘合剂可均匀地和/或匀质地涂覆。其可为热塑性粘合剂材料。
根据某些实施例,热塑性粘合剂材料可整体包括单一热塑性聚合物或热塑性聚合物的共混物,当通过ASTM方法D-36-95“Ring和Ball”测定时,所述聚合物具有在介于50℃和300℃之间的范围内的软化点;或作为另外一种选择,热塑性粘合剂材料可为热熔融粘合剂,其包括至少一种与其它热塑性稀释剂诸如增粘树脂、增塑剂和添加剂诸如抗氧化剂相组合的热塑性聚合物。在某些实施例中,热塑性聚合物通常具有超过10,000的分子量(Mw)和通常低于室温的玻璃化转变温度(Tg)或-6℃>Tg<16℃。在某些实施例中,热熔融聚合物的典型浓度按重量计在约20%至约40%的范围内。在某些实施例中,热塑性聚合物可为对水不敏感的。示例性聚合物为包括A-B-A三嵌段结构、A-B两嵌段结构和(A-B)n径向嵌段共聚物结构的(苯乙烯)嵌段共聚物,其中A嵌段为通常包含聚苯乙烯的非弹性体聚合物嵌段,并且B嵌段为不饱和共轭双烯或(部分)氢化的此类变体。B嵌段通常为异戊二烯、丁二烯、乙烯/丁烯(氢化丁二烯)、乙烯/丙烯(氢化异戊二烯)、以及它们的混合物。可采用的其它合适的热塑性聚合物为茂金属聚烯烃,它们为利用单位点或茂金属催化剂制备的乙烯聚合物。其中,至少一种共聚单体可与乙烯聚合以制备共聚物、三元共聚物或更高级的聚合物。同样适用的是无定形聚烯烃或无定形聚α-烯烃(APAO),它们为C2-C8α烯烃的均聚物、共聚物或三元共聚物。在示例性实施例中,增粘树脂通常具有低于5,000的Mw和通常高于室温的Tg;热熔融状态的树脂的典型浓度在约30%至约60%的范围内;并且增塑剂具有通常小于1,000的低Mw和低于室温的Tg,其典型浓度为约0%至约15%。在某些实施例中,热塑性粘合剂材料以纤维形式存在。在一些实施例中,这些纤维将具有约1微米至约50微米或约1微米至约35微米的平均粗度和约5mm至约50mm或约5mm至约30mm的平均长度。
其它方法步骤/设备单元
本文的设备1和方法可包括如下另一个步骤/单元:将另外的支撑片材300施加到所述吸收结构上以包封所述吸收材料,如本领域已知的那样。这可进行成使得第一吸收结构的通道或每个通道对应于第二吸收结构的通道。
作为另外一种选择或除此之外,本文的设备1和方法还可包括如下设备1单元/方法步骤:将支撑片材200折叠到吸收材料100上从而包封它。其可包括密封单元、密封步骤以沿吸收层的周边边缘密封所述两个支撑片材200或折叠的支撑片材200。
作为另外一种选择或除此之外,吸收结构还可与其它层诸如采集层或顶片相组合,并且本文的设备1和方法可包括相应的步骤/单元。
本文的方法或设备1可旨在生产吸收芯或结构,其包括上述吸收结构中的两个或更多个;例如彼此叠加的两个此类层,使得第一层的吸收材料100和另一个第二层的吸收材料100彼此邻近并且夹置在第一层的支撑片材200和第二层的支撑片材200;300之间。本文的设备1可因此成为一种组合设备,包括本文所述设备中的两个或更多个例如两个,从而生产出两个或更多个例如两个吸收结构,并且因而包括组合单元以组合这些吸收结构。该方法可包括相应的方法步骤。
用本文的本发明的方法/设备1生产的吸收结构也可与通过不是本公开的方法/设备1所生产的吸收结构相组合,所述组合可如上所述地进行。
设备1可包括压力部件70诸如压力辊,其能够向吸收结构上施加压力,并且通常为如下吸收结构,其中吸收材料100夹置在支撑片材200和另外的材料之间;压力可施加到所述支撑片材200上或施加在放置在吸收层上的任何所述另外的材料/层上,如该段落的上文所述。本文的方法因而可包括对应的方法步骤。
该压力施加可任选地进行以选择性地仅向吸收结构的通道上施加压力,例如施加在支撑片材200的如下部分上,所述部分对应于通道并且因此不包括(在相对的表面上)吸收材料,从而避免所述吸收材料100自身的压实。
因此,设备1可包括具有凸起施压图案71的压力部件70,所述施压图案对应于凸起条的和/或所述配合条的所述图案,在一些任选地对应于配合条的图案。该方法可具有相应的方法步骤。
吸收制品
本发明的设备1和方法例如适用于生产适用于吸收制品的吸收结构或吸收芯(即与本文所述另外的材料组合的所述结构)。
吸收制品可包括尿布,所述尿布包括可扣紧尿布和(可重复扣紧的)训练裤;成人失禁内衣(护垫、尿布)。女性卫生产品(卫生巾、卫生护垫)、胸垫、护理垫、围兜、伤口敷料产品等。在一些优选的实施例中,吸收制品为尿布、或成人失禁产品。
除了吸收结构或吸收芯以外,本文的吸收制品还可包括顶片和底片、以及例如一个或多个侧翼或箍。顶片或箍或侧翼可包括本领域已知的护肤组合物或洗剂或粉末、片,包括U.S.5,607,760;U.S.5,609,587;U.S.5,635,191;U.S.5,643,588中所述的那些。
本文优选的吸收制品包括在使用中面向穿着者的顶片,例如非织造片材、和/或开孔片,包括如本领域已知的开孔成形膜;和底片。
底片可为液体不可透过的,如本领域已知的那样。在优选的实施例中,液体不可透过的底片包括薄塑料薄膜例如具有约0.01mm至约0.05mm厚度的热塑性薄膜。合适的底片材料典型地包括允许蒸汽从尿布逸出同时还防止渗出物透过底片的透气材料。合适的底片薄膜包括由TredegarIndustries Inc.,Terre Haute,IN制造并以商品名X15306、X10962和X10964出售的那些。
底片或其任何部分可在一个或多个方向上弹性地延展。可通过本领域已知的任何附接部件将底片附接或接合到顶片、本文所述的吸收结构或芯、或尿布的任何其它元件。
本文的尿布可包括腿箍和/或阻隔箍;因而制品通常具有一对相对的侧翼和/或腿箍和/或阻隔箍,每对均被定位成邻近吸收结构或芯的一个纵向侧边,并且沿所述结构或芯纵向延伸,并且通常在制品的纵向轴线上互为镜像;如果存在腿箍和阻隔箍,则每个腿箍通常被定位在阻隔箍的外侧。这些箍可沿至少70%长度的制品纵向延伸。所述箍可具有自由的纵向边缘,所述边缘可定位在制品的X-Y平面(纵向/横向)外,即在z方向上。成对的侧翼或箍可在制品的Y轴线(纵向轴线)上互为镜像。这些箍可包括弹性材料。
本文的尿布可包括腰带,或例如前腰带和后腰带,它们可包括弹性材料。
尿布可包括侧片或所谓的耳片。尿布可包括用以扣紧前部和后部的扣紧部件,例如前腰带和后腰带。优选的扣紧系统包括扣紧插片和着陆区,其中扣紧插片接连或接合到尿布的后区并且着陆区为尿布的前区的一部分。
吸收制品也可包括设置在顶片和吸收结构或芯之间的次层,所述次层能够吸收并分配和/或固定身体流出物。适宜的次层包括如本领域已知的采集层、涌流层和/或粪便存储层。用作次层的合适的材料可包括大气室开放式泡沫、大孔耐压高蓬松非织造材料、大粒径颗粒形式的开孔和闭孔泡沫(大孔和/或微孔)、高蓬松非织造材料、聚烯烃、聚苯乙烯、聚氨酯泡沫或微粒、包括大量垂直定向的任选地环状的纤维束的结构、或任选地如上关于生殖器覆盖片所述的开孔成形膜。(本文所用术语“微孔的”是指能够通过毛细作用传送流体但具有大于50微米的平均孔径的材料。术语“大孔的”是指这样的材料:所述材料具有的孔太大而不能通过毛细作用传送流体,所述材料通常具有大于约0.5mm(平均)的直径的孔,更具体地讲,具有大于约1.0mm(平均)的直径但典型地小于10mm或甚至小于6mm(平均)的直径的孔。
本文所指的转让给Procter&Gamble Company的所有专利和专利申请(包括因此公布的任何专利)均在与本文一致的程度上以引用方式并入本文。
本文所公开的量纲和值不应当被理解为严格限于所引用的精确值。相反,除非另外指明,每个这样的量纲均旨在既表示所引用的值,也表示围绕此值的功能上等同的范围。例如,公开为“40mm”的量纲旨在表示“约40mm”。
在具体实施方式中引用的所有文献的相关部分均引入本文以供参考;任何文献的引用并不可理解为是对其作为本公开的现有技术的认可。当本文献中术语的任何含义或定义与以引用方式并入的文献中相同术语的任何含义或定义冲突时,将以赋予本文献中那个术语的含义或定义为准。
尽管已用具体实施例来说明和描述了本公开内容,但对于本领域的技术人员显而易见的是,在不脱离本发明的实质和保护范围的情况下可作出许多其它的改变和变型。因此,所附权利要求旨在涵盖本发明范围内的所有这些改变和变型。
Claims (20)
1.一种制备用于吸收制品的吸收结构的设备(1),包括:
支撑片材(200)和其上的吸收层,所述吸收层具有纵向尺寸和横向尺寸以及高度尺寸,所述吸收层包括吸收材料(100),所述吸收材料在其中具有一个或多个基本上不含吸收材料的通道,所述设备(1)具有:
a)喂料机(60),所述喂料机用于将所述吸收材料(100)喂送至第一移动的环状表面(20);
b)转移装置(210),所述转移装置用于将支撑片材(200)转移至第二移动的环状表面(30);
c)第一移动的环状表面(20),所述第一移动的环状表面具有一个或多个吸收层形成贮存器(25),所述贮存器具有纵向尺寸和平均长度、与其垂直的横向尺寸和平均宽度、和与它们两者均垂直的深度尺寸和平均深度、以及用于在其中容纳所述吸收材料(100)的空隙体积,所述贮存器包括一个或多个基本上纵向延伸的凸起条(21),所述凸起条各自具有平均宽度W和平均长度L,所述平均宽度为所述贮存器的平均宽度的至少5%,并且所述平均长度为所述贮存器的平均纵向尺寸的至少5%且至多80%;所述贮存器(25)用于将所述吸收材料(100)转移至与其邻近且接近的所述第二移动的环状表面(30);
d)第二移动的环状表面(30),所述第二移动的环状表面具有外壳,所述外壳具有一个或多个透气的或部分地透气的储槽(33),所述储槽用于在其上或在其中容纳所述支撑片材(200),并且所述储槽(33)具有一个或多个基本上纵向延伸的配合条(31),所述配合条各自具有为0.5×W至1.2×W的平均宽度W',并且各自具有为0.8×L至1.2×L的平均长度L',
其中所述外壳优选地连接至一个或多个真空系统,所述真空系统用于促进对所述支撑片材(200)和/或其上的所述吸收材料(100)的保持,并且
其中在会合点,所述第一移动的环状表面(20)和所述第二移动的环状表面(30)在所述吸收材料(100)从所述第一移动的环状表面转移至所述第二移动的环状表面期间彼此邻近且紧邻;并且
其中每个配合条(31)在所述吸收材料的转移期间均基本上配合凸起条(21)。
2.根据权利要求1所述的设备(1),其特征在于,W为至少5mm,并且L为至少30mm,并且W'为至少2.5mm。
3.根据权利要求1或2所述的设备(1),其特征在于,所述贮存器(25)由大量的具有空隙体积的沟槽和/或腔体(22)形成,所述空隙体积用于在其中容纳所述吸收材料(100),并且W为至少6mm。
4.根据权利要求3所述的设备(1),其特征在于,所述沟槽和/或腔体(22)各自具有至少3mm的横向上的最大尺寸,并且其中直接相邻的腔体(22)和/或沟槽之间的基本上横向尺寸上的最短距离小于5mm。
5.根据前述权利要求中任一项所述的设备(1),其特征在于,除所述凸起条(21)之外的所述第一移动的环状表面的贮存器(25)具有旨在部分地透气的孔,并且其中所述第一移动的环状表面(20)具有包括所述贮存器的圆柱形表面,所述圆柱形表面可旋转地围绕定子移动,包括连接至真空系统的真空室(28);并且其中所述第二移动的表面的外壳为圆筒,所述圆筒可旋转地围绕定子移动,所述定子包括连接至真空系统的真空室(28)。
6.根据前述权利要求中任一项所述的设备(1),其特征在于,所述凸起条(21)的总表面区域(在所述第一移动的环状表面的平面中)为所述贮存器(25)的总表面区域(在所述环状表面的平面中)的3%至20%。
7.根据前述权利要求中任一项所述的设备(1),其特征在于,存在至少两个配合条(31),它们在所述储槽(33)的纵向轴线上互为镜像;并且存在至少两个凸起条(21),它们在所述贮存器(25)的纵向轴线上互为镜像。
8.根据前述权利要求中任一项所述的设备(1),其特征在于,所述储槽(33)还包括大量基本上纵向延伸的杆(36),它们在横向上彼此间隔开,每个杆具有至少0.3mm且小于2.5mm的最大宽度尺寸,所述杆(36)各自具有至少1mm的平均高度尺寸,优选地所述杆(36)的顶部表面和所述配合条(31)处在所述储槽(33)的相同平面中。
9.根据前述权利要求中任一项所述的设备(1),其特征在于,所述贮存器(25)由大量所述腔体(22)和/或所述沟槽形成,并且其中直接邻近凸起条(21)的所述腔体(22)和/或沟槽具有的体积超过它们的不直接邻近凸起条的相邻腔体(22)或沟槽中的一个或多个或全部的体积。
10.根据前述权利要求中任一项所述的设备(1),其特征在于,包括定位在所述会合点下游的第一粘合剂涂覆单元(50)和/或所述会合点上游的第二粘合剂涂覆单元(51)。
11.根据前述权利要求中任一项所述的设备(1),其特征在于,包括所述会合点下游的单元(310)以用另外的材料覆盖所述吸收层,所述另外的材料选自用于将所述支撑片材(200)折叠到所述吸收层上的单元;用于施加另外的支撑片材(300)的单元;用于施加另外的层状材料例如采集材料的单元;用于将所述结构与另外的吸收结构组合的单元。
12.根据前述权利要求中任一项所述的设备(1),其特征在于,包括具有凸起压力图案(71)的下游压力辊(70),所述压力图案基本上对应于所述配合条的图案,所述压力图案用于选择性地在其对应于所述通道的区域中接触所述吸收结构的支撑片材(200)或所述另外的材料。
13.一种组合设备,包括:
i)前述权利要求中任一项的至少第一设备(1)和前述权利要求中任一项的第二设备(1);或
i)前述权利要求中任一项的至少第一设备(1)和第二设备,所述第二设备具有:
a)喂料机,所述喂料机用于将吸收材料喂送至第一移动的环状表面;
b)转移装置,所述转移装置用于将支撑片材转移至第二移动的环状表面;
c)所述第一移动的环状表面,所述第一移动的环状表面具有一个或多个吸收层形成贮存器,所述贮存器具有纵向尺寸、与其垂直的横向尺寸和与它们垂直的深度尺寸、以及空隙体积,所述空隙体积用于在其中容纳所述吸收材料,并且将所述吸收材料转移至:
d)所述第二移动的表面,所述第二移动的表面具有外壳,所述外壳具有一个或多个透气的或部分地透气的容纳区域,在其上或在其中具有所述支撑片材,其中所述外壳优选地连接至一个或多个真空系统,所述真空系统用于促进将支撑片材和/或所述吸收材料保持在所述表面上;
并且
ii)其中在会合点,所述第一移动的环状表面和所述外壳在所述吸收材料的转移期间彼此邻近且彼此紧邻;并且
iii)其中所述组合设备还包括用以组合由所述第一设备(1)和第二设备生产的吸收结构的单元,以形成层压体吸收芯。
14.一种使用前述权利要求中任一项的设备(1)制备吸收结构的方法。
15.一种制备吸收结构的方法,所述吸收结构具有纵向尺寸和横向尺寸以及高度尺寸,并且包括支撑片材(200)和其上的吸收材料(100)的吸收层和其中的一个或多个基本上无吸收材料的通道,所述方法包括以下步骤:
a)提供喂料机(60),所述喂料机用于将所述吸收材料(100)喂送至第一移动的环状表面(20);
b)提供转移装置,所述转移装置用于将支撑片材(200)转移至第二移动的环状表面(30);
c)提供第一移动的环状表面(20),所述第一移动的环状表面具有一个或多个吸收层形成贮存器(25),所述贮存器具有纵向尺寸和平均长度、与其垂直的横向尺寸和平均宽度、和与它们两者均垂直的深度尺寸和平均深度、以及用于在其中容纳所述吸收材料(100)的空隙体积,所述贮存器包括一个或多个基本上纵向延伸的凸起条(21),所述凸起条各自具有平均宽度W和平均长度L,所述平均宽度为所述贮存器的平均宽度的至少5%,并且所述平均长度为所述贮存器的平均纵向尺寸的至少5%且至多80%;所述贮存器用于将所述吸收材料(100)转移至与其邻近且接近的所述第二移动的环状表面(30);
d)提供第二移动的环状表面(30),所述第二移动的环状表面具有外壳,所述外壳具有一个或多个透气的或部分地透气的储槽(33),所述储槽用于在其上或在其中容纳所述支撑片材(200),所述储槽具有容纳区域并且具有一个或多个基本上纵向延伸的配合条(31),并且各自具有为0.5×W至1.2×W的平均宽度W'、和为约0.8×L至1.2×L的平均长度L',
其中所述外壳优选地连接至一个或多个真空系统,所述真空系统用于促进对支撑片材(200)和/或其上的所述吸收材料(100)的保持,并且
其中在会合点,所述第一移动的环状表面(20)和所述外壳在所述吸收材料(100)的转移期间至少部分地彼此邻近且彼此紧邻,并且在所述吸收材料的转移期间使得每个配合条(31)基本上完全邻近且紧邻凸起条(21);
e)用所述喂料机(60)将吸收材料(100)喂送至所述第一移动的环状表面(20),喂送到至少其所述贮存器(25)中;
f)任选地,移除所述凸起条(21)上的任何吸收材料(100);
g)同时地,将所述支撑片材(200)转移至所述第二移动的环状表面,转移到所述储槽(33)上或其中;
h)在所述会合点,选择性地仅用所述第一移动的环状表面(20)将所述吸收材料(100)转移至所述支撑片材(200)的如下所述部分,所述部分处在所述储槽(33)的所述容纳区域上或其中,但基本上不转移至处在所述配合条上的所述支撑片材(200)的所述部分。
16.根据权利要求14或15所述的方法,其特征在于,所述吸收材料(100)为粒状超吸收聚合物材料。
17.根据权利要求14至16中任一项所述的方法,其特征在于,包括以下步骤:提供第一粘合剂涂覆单元(50),并且在从所述第二移动的环状表面上移除它之前或紧接在所述移除之后向所述吸收结构上涂覆粘合剂;和/或所述方法包括以下步骤:提供第二粘合剂涂覆单元(51),并且在所述吸收材料(100)沉积到其上之前向所述支撑片材(200)涂覆粘合剂。
18.根据权利要求14至17中任一项所述的方法,其特征在于,包括以下步骤:
-在所述会合点下游提供单元(310)以用材料来覆盖所述吸收层,所述材料选自用于将所述支撑片材(200)折叠到所述吸收层上的单元;用于将另外的支撑片材(300)施加到所述吸收层上的单元;用于将另外的层状材料例如采集材料施加到所述吸收层上的单元;用于组合所述吸收结构与第二吸收结构的单元;以及
-分别用如下材料来覆盖所述吸收结构:所述折叠的所述支撑片材(200);所述另外的支撑片材(200)材料;所述另外的层状材料;或所述第二吸收结构,以获得吸收芯。
19.根据权利要求14至18中任一项所述的方法,其特征在于,包括以下步骤:提供具有凸起压力图案(71)的压力辊(70),所述压力图案基本上对应于所述配合条(31)的图案;以及将所述压力辊图案选择性地与所述支撑片材(200)材料或所述另外的层的如下部分配合,所述部分对应于所述吸收结构的所述层中的所述通道。
20.一种吸收结构或吸收芯、或包括所述吸收结构或吸收芯的吸收制品,所述吸收结构或吸收芯可通过前述权利要求中任一项所述的方法或用前述权利要求中任一项所述的设备来获得。
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- 2012-06-08 CN CN201280028290.XA patent/CN103607985B/zh not_active Expired - Fee Related
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CN111923464B (zh) * | 2020-07-20 | 2022-12-13 | 陈建功 | 一种可生产多种不同形状铝型材的挤压设备 |
CN111923464B8 (zh) * | 2020-07-20 | 2023-01-13 | 佛山市骏明耀铝业有限公司 | 一种可生产多种不同形状铝型材的挤压设备 |
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CA2838841C (en) | 2016-06-07 |
SG195284A1 (en) | 2013-12-30 |
EP2532329B1 (en) | 2018-09-19 |
RU2564621C2 (ru) | 2015-10-10 |
US11000422B2 (en) | 2021-05-11 |
JP2014534820A (ja) | 2014-12-25 |
EP2532329A1 (en) | 2012-12-12 |
CN103607985A (zh) | 2014-02-26 |
CN103607985B (zh) | 2015-09-23 |
US20120312491A1 (en) | 2012-12-13 |
JP5996638B2 (ja) | 2016-09-21 |
US20190038477A1 (en) | 2019-02-07 |
CL2013003525A1 (es) | 2014-07-11 |
US8568566B2 (en) | 2013-10-29 |
RU2013156989A (ru) | 2015-07-20 |
WO2012170798A1 (en) | 2012-12-13 |
US10245188B2 (en) | 2019-04-02 |
MX2013014591A (es) | 2014-01-24 |
BR112013031719A2 (pt) | 2016-12-06 |
US20140027066A1 (en) | 2014-01-30 |
CA2838841A1 (en) | 2012-12-13 |
US20170231828A1 (en) | 2017-08-17 |
US9492328B2 (en) | 2016-11-15 |
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