CN1580382A - 用油使超吸收性材料附着于纤维 - Google Patents
用油使超吸收性材料附着于纤维 Download PDFInfo
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- CN1580382A CN1580382A CNA2004100284974A CN200410028497A CN1580382A CN 1580382 A CN1580382 A CN 1580382A CN A2004100284974 A CNA2004100284974 A CN A2004100284974A CN 200410028497 A CN200410028497 A CN 200410028497A CN 1580382 A CN1580382 A CN 1580382A
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Abstract
本发明公开了将油用于吸收结构中以促进超吸收性材料保留在吸收结构内,所述吸收结构由纤维和超吸收性材料制成。在将纤维和超吸收性材料制成吸收结构之前或之中,将油施用于纤维或超吸收性材料上,或同时施用于两者上。本发明描述了吸收结构的吸收速率和流体保留水平。
Description
技术领域
本发明涉及使用油使超吸收性材料附着于纤维、实现这种附着的方法以及在使超吸收性材料附着于纤维时所使用的组合物。
背景技术
在制备吸收制品如尿布和失禁装置时,已知混合超吸收性材料和纤维素纤维可形成吸收芯。吸收芯容纳待吸附的流体,并保留这些流体。当超吸收性材料为粉末或小颗粒形式时,将超吸收性材料保留在吸收芯中是很困难的,所述吸收芯包括纤维基质,通常是纤维素纤维。已经描述了在吸收芯中保留超吸收性材料的多种方法。例如,已提出将纤维素纤维嵌入到超吸收性材料的表面内。
另一种方法描述于转让给本申请受让人的国际公开WO 94/04352和WO 94/04351,该方法在超吸收性材料和纤维之间提供了聚合的或非聚合的粘合剂。粘合剂被描述用于通过氢键或或配位共价键使超吸收性材料与纤维粘合。所述的国际公开描述了,向颗粒或纤维中添加少量水分可令人满意地促进在超吸收性材料和纤维之间的粘合。水分被描述为通过周围环境天然地提供,例如在超吸收性材料、粘合剂和纤维混合的环境中,当相对湿度为约60%至75%,或更高时,可天然地提供水分。在一些情况下,其中确定水分是必需的,且相对湿度低于所需水平时,可使用固定设备来增湿制造区域,在那里超吸收性材料、粘合剂和纤维发生接触。尽管增湿制造区域是有效的,但是这需要资本投资并增加生产成本。
在吸收芯中长期保留超吸收性材料是制造商面临的另一个困难。在吸收芯中超吸收性材料的保留经一段时间后可能由于许多原因而失效,如剧烈处理吸收芯可导致超吸收性材料的移位或吸收芯的水分含量的减少。
尿布包括由超吸收性材料和纤维素纤维组成的吸收芯,尿布典型地通过混合纤维素纤维和超吸收性材料的方法来制备。在这个方法中,没有超吸收性材料的纤维素纤维的卷或包通过纤维化装置如锤磨机纤维化。这些纤维化的纤维素纤维被夹带入空气,超吸收性材料被引入到加气纤维中。纤维素纤维和超吸收性材料的加气混合物被递送至气流成网装置如制垫机中,所述装置将纤维和超吸收性材料吸到筛子上,并将纤维和超吸收性材料制成特定形状。然后从制垫机中去除这些形成的衬垫以备进一步处理。在制备过程中为了使超吸收性材料的利用最大化和超吸收性材料的损失量最小化,尿布制造商希望在纤维和超吸收性材料一起被空气夹带时,将超吸收性材料附着到纤维上。
对于这个技术背景,本发明人已研究并解决了上述困难,并开发了使用油来协助吸收制品保留在超吸收性制品内的组合物和方法。
发明内容
本发明提供了用油处理的纤维和/或超吸收性材料以用于吸收芯,所述吸收芯由处理的纤维和/或处理的超吸收性材料、以及未处理的纤维和/或未处理的超吸收性材料制成。本发明的组合物可被制成吸收制品以吸收流体例如含水流体如尿液或血液。组合物可用于下述方法中,所述方法用于在纤维网或纤维块中保留超吸收性材料,所述纤维网或纤维块通常用作吸收制品如尿布、失禁装置和女性卫生产品的吸收结构。所述方法提供了能在一定水平保留超吸收性材料的吸收结构,以使吸收制品的制造商满意。令人惊奇地,当根据本发明使用油时,尽管油具有疏水性,但是包括用油处理的纤维或超吸收性材料的吸收制品能以一定的速率和一定的量吸收并保留流体,这会使得吸收制品的制造商和消费者感到满意。使用油的其它优点将在下面更详细地描述,它们包括制备可保留超吸收性材料的吸收制品的能力,这与制备吸收制品时所具有的湿度、或制备的吸收制品在一段时间内所接触的湿度无关。
在一个方面,本发明涉及吸收含水流体的制品,其包括纤维素纤维和超吸收性材料,其中纤维素纤维或超吸收性材料用油处理。本发明还涉及已用油处理的纤维素纤维和已用油处理的超吸收纤维,其中所述油的熔点低于将油施用于纤维或超吸收性材料时的温度。
在另一方面,本发明涉及在纤维素纤维网内保留超吸收性材料的方法。在一个实施方案中,本方法提供了施用有油的纤维素纤维,其中油的熔点低于将油施用于纤维时的温度。然后将油处理过的纤维素纤维与超吸收性材料接触。在本发明的这个方面的另一个实施方案中,本方法提供了施用有油的超吸收性材料,其中油的熔点低于将油施用于超吸收性材料时的温度。然后将油处理过的超吸收性材料与纤维素纤维接触。
附图说明
参照下面的详细描述并结合附图,本发明的上述方面和许多附带的优点将变得显而易见,其中:
图1说明了测量超吸收性材料的水平的试验结果,其中所述超吸收性材料保留在不同吸收结构中;
图2说明了图1的吸收结构的吸收时间;
图3说明了图1的吸收结构所吸收的流体的量;和
图4说明了在马鞍型芯吸试验中所使用的装置示意图。
具体实施方式
如本发明使用的,术语“纤维”是指天然或合成的纤维。这些纤维可以是物理预处理的,例如通过使纤维经受蒸汽处理,或化学处理,例如通过交联纤维。纤维也可以按需要被扭曲或卷曲。
纤维的具体类型是纤维素纤维。纤维素纤维的具体实例为木浆纤维。木浆纤维可以为硬木浆纤维或软木浆纤维。木浆纤维可以是化学的、热机械的、化学热机械的或其组合。这些木浆纤维可得自熟知的化学方法如牛皮纸制浆法或亚硫酸盐制浆法。其它纤维素纤维包括莱塞尔、亚麻布、短丝纤维、蔗渣、大麻、黄麻、水稻、小麦、竹子、玉米、剑麻、棉花、亚麻、洋麻、泥煤苔及其混合物。当纤维为纤维素纤维时,它们可用化学物质预处理以得到富含木质素或纤维素的纤维表面。另外,纤维可被漂白。
合成纤维的实例包括丙烯酸、聚酯、羧化聚烯烃和聚胺纤维。
如本发明使用的,术语“超吸收性材料”是指在接触水后膨胀并通过吸收大量水以形成水合凝胶(水凝胶)的聚合物。超吸收性材料能够吸收大量流体,即每份材料吸收超过10至15份流体。这些超吸收性材料通常分为三类,即淀粉接枝共聚物、交联羧甲基纤维素衍生物和改性的亲水聚丙烯酸酯。这些吸收聚合物的实例为水解的淀粉-丙烯腈接枝共聚物、中性淀粉-丙烯酸接枝共聚物、皂化丙烯酸酯-乙酸乙烯酯共聚物、水解的丙烯睛共聚物或丙烯酰胺共聚物、改性的交联聚乙烯醇、中性自交联聚丙烯酸、交联聚丙烯酸盐、羧化纤维素和中性交联异丁烯-马来酸酐共聚物。
超吸收颗粒有市售,例如淀粉接枝聚丙烯酸酯水凝胶细粒(IM1000F),得自Portsmouth,VA的Hoechst-Celanese,或较大粒子如颗粒。其它市售超吸收颗粒的商品名为SANWET(得自Sanyo Kasei KogyoKabushiki Kaisha)、SUMIKA GEL(得自Sumitomo Kagaku KabushikiKaisha,其为乳液聚合的、呈球状,与溶液聚合的细磨粒子不同)、FAVOR(得自Greensboro,North Carolina的Stockhausen)和NORSOCRYL(得自Atochem)。
所使用的术语“油”通常涉及许多物质。油可以得自动物或植物种子或坚果,这些类型的油在化学上倾向于等同于脂肪,唯一区别是室温下的稠度不同。动物油和植物油主要由脂肪酸、油酸、棕榈酸、硬脂酸和亚麻酸的甘油三酯组成。油还可得自石油来源。来自石油的油通常包括烃混合物。如本发明所使用的,术语“油”是指熔点低于将其施用于纤维或超吸收性材料时的温度的油,这将在下面更详细地描述。这些温度通常低于25℃,但可能较高。如果油的熔点大于将其施用于纤维或超吸收性材料时的周围温度,那么油可被加热而液化。这保证了油在施用于纤维或超吸收性材料时保持为液体。可用于本发明的油还应具有足够低的蒸汽压,以防止在施用或使用时蒸发。
油不应快速渗透纤维的壁,以免在超吸收性材料与油处理的纤维接触时,不能保持超吸收性材料。在由纤维、油和超吸收性材料制成的吸收制品的使用寿命期间,油优选存在于纤维表面。为此,具有较高分子量的油比具有较低分子量的油较慢地渗透纤维壁。
对于某些油,具体是那些包括不饱和组分的油如大豆油,已观察到,尽管象其它油一样可用于促进超吸收性材料在吸收结构内的保留,所述吸收结构包括纤维和超吸收性材料,但是在长期接触空气后,可观察到大豆油会发生交联和固化。固化的大豆油增加了施用有大豆油的纤维的疏水性。对于大豆油和其它可能发生这样的交联的油,可使用交联抑制剂或稳定剂如叔丁基羟基苯甲醚(BHA,2-或3-叔丁基-4-甲氧基-苯酚);丁基羟基甲苯(BHT,2,6-二叔丁基-4-甲基-苯酚);抗坏血酸(维生素C);棕榈酸抗坏血酸酯;生育酚(维生素E);鼠尾草酸;和芝麻素来抑制这些交联作用。
如本发明使用的术语“油”的实例包括脂肪和它们的脂肪酸组分。如上所述,脂肪为长链羧酸和三元醇甘油的天然酯。这些酯还可称为甘油三酯。脂肪水解产生甘油和三种羧酸组分。可通过脂肪水解得到的这些直链羧酸称为脂肪酸,其包括一个羧酸基。脂肪酸可以是饱和的或不饱和的。最常见的饱和脂肪酸是月桂酸、肉豆寇酸、棕榈酸和硬脂酸。其它脂肪酸包括油酸、亚油酸和亚麻酸。通常,脂肪的熔点取决于脂肪酸的不饱和度。含有大量不饱和酸的脂肪的熔点通常低于约25℃。本发明所使用的术语油的具体实例包括大豆油、棉籽油、亚麻子油、桐油、蓖麻油、椰子油、橄榄油、低芥酸菜子油、红花油、玉米油或霍霍巴油。霍霍巴油在室温下为浅黄色油,在技术上讲不是油或脂肪,而是蜡。蜡是指脂肪酸与长链一元醇形成的酯。本发明所使用的术语油将包括霍霍巴油和其它蜡,所述蜡在根据本发明将其施用于纤维或超吸收性材料的温度下为液体。应理解,上述物质为示例性油的列表,本发明不一定局限于上述油。应理解,本申请所使用的术语“油”不仅是指其本身包括多种脂肪和脂肪酸组分的混合物的油,还包括单个分离的脂肪和分离的脂肪酸,所述脂肪酸在该脂肪水解时产生。例如,本发明所使用的术语“油”还可指脂肪酸:油酸、棕榈酸、硬脂酸和亚麻酸,它们在得自动物和植物的许多油中形成最常见的甘油三酯,可根据本发明用在吸收结构中以保留超吸收性材料,所述吸收结构包括纤维和超吸收性材料。
本发明所使用的术语“油”还可以指未取代的链烷烃、链烯烃、链炔烃、环烷烃、环烯烃、环炔烃、芳烃及其混合物,它们得自石油或动物来源,熔点低于将油施用于纤维或超吸收性材料的温度(这将在下面更详细地描述),例如约25℃。这些油通常得自石油来源,但也可得自动物来源。可用于本发明的这类油应具有足够低的蒸汽压,以防止在施用或使用时油蒸发。这些类型的油的具体实例包括矿物油、石蜡油、十六烷、角鲨烷和角鲨烯。
如本发明使用的,矿物油为高度精制液体石油衍生物的实例。矿物油为轻质、透明、无色和无味,还可称为药用油。矿物油在医药上用作内部润滑剂,用于制备药膏和油膏。
石蜡油为石蜡馏出物经加压蒸馏或干燥蒸馏而得的油的实例,所述石蜡馏出物得自石油蒸馏。
角鲨烷是得自动物来源如皮脂的链烷烃实例。角鲨烯是链烯烃实例;更具体地,它是得自动物来源如人皮脂或鲨鱼肝油的萜。角鲨烯也可从得自植物和酵母的油分离得到,所述油为例如橄榄油、麦胚芽油、米糠油。
如下文更详细描述的,本发明人已发现,与包括那些未根据本发明使用油来处理的超吸收性材料和纤维的吸收结构内保留的超吸收性材料量相比,,由油处理的纤维或超吸收性材料形成的吸收结构可在结构内保持较多量的超吸收性材料。
在气流成网的吸收结构内的超吸收性材料的保留可使用如下所述的Rotap试验来评估,所述吸收结构包括纤维和超吸收性材料。
将切割自包括纤维和超吸收性材料的吸收结构的10×10cm的衬垫放在一组筛子的顶部筛子上。这组筛子从顶部至底部包括8目筛子、20目筛子和200目筛子。在200目筛子下设有收集盘,以收集通过这三个筛子的物质。盖子置于8目筛子上。将筛子组放在Rotap装置内,所述Rotap装置可以旋转筛子组,同时用锤子敲击盖子。旋转和敲打的频率为约2Hz。除非另有说明,将样品处理2分钟。在2分钟后,200目筛子上收集有超吸收性材料和纤维的混合物。纤维可用钳子很容易地取出,称量超吸收性材料。对于较长的测试时间,在200目筛子上的超吸收性材料可每隔一段时间进行测量。Rotap机器由W.S.Tyler,Incorporated制造。
本发明人已观察到,令人惊奇地,作为疏水材料的油的存在没有显著改变吸收结构吸收和运输流体的能力。吸收结构吸收和运输流体的能力可使用下述的马鞍型芯吸试验来评估。
马鞍型芯吸试验用于说明液体从初始定量进料点向吸收结构内的分布。这个试验还测量了三种不同剂量的液体被吸收至吸收结构的速度。在马鞍型芯吸装置内进行试验,所述装置包括在图4内说明的装置。
参照图4,马鞍型芯吸装置50包括U型接受器52,其通过间隔分开的左支撑板54和右支撑板56来支撑。支撑板包括U型切口部分,其形成托架,以直立地容纳和支持U型接受器,其开口端向上。位于U型接受器52的槽内的是两个间隔分离的挡板58和60。挡板58和60包括下边缘62,其与U型容器52所形成的槽的底部配合。挡板58和60的上边缘64位于下边缘的上方,这样挡板58和60形成向上延伸的单元,其用于阻止流体流过挡板,所述流体在挡板之间分配。
U型接受器的开口顶部为约23.2cm宽。U型接受器深约17.1cm。挡板58和60从槽底部计算为约3.2cm高,并沿U型接受器向上延伸至一个位置,其中U型容器的一个侧壁与另一个侧壁之间的距离为约14.0cm。挡板58和60以约12.7cm的距离间隔分开。马鞍型芯吸装置可由任意硬质材料如塑料制成。如下面更详细描述的,样品66位于U型接受器的底部,在挡板58和60之间。
吸收制品包括超吸收性材料和纤维,其尺寸为约30cm长,12.1cm宽,将其分割成从样品中心线的左边到右边为3.8cm宽的片段,。这形成了在中心线右边的片段F1、F2、F3和F4和在中心线左边的B1、B2、B3、B4。在吸收结构上标记这些图案。然后将样品定位,夹在马鞍型芯吸装置内,使得它保持与装置一样的曲率。吸收结构不应在中心处向上弯曲。如果必要,可在马鞍型芯吸装置的底部使用胶带,以防止吸收结构向上弯曲。在中心线的右边2.5cm处标以X。这表示进料(insult)点。在X上5cm处有一个漏斗。漏斗的流速为每秒5-7ml。第一次进料的100ml合成尿通过漏斗分配。测量从开始进料到合成尿被完全吸收至吸收结构内的时间。当吸收结构的折缝和折痕看不见液体时,就说明合成尿完全吸收了。记录第一次进料的时间。另外在第二次和第三次进料时使用50ml合成尿将上述方法另外重复两次。在开始进料和所施用的合成尿被完全吸收之间的时间记录为第二次和第三次进料的时间。然后将吸收结构切为片段F1-F4和B1-B4,如上所述。应在第三次进料停止后的五分钟内切割完吸收结构。然后称量各个片段,记录重量。然后将切割的片段放在Plexiglas板上,在烘箱中干燥,温度为92-100℃,最小干燥时间为16小时。然后称量所干燥的片段,记录重量。通过从具体片段的湿重量减去干重量,计算得到各个相应区域中所吸收的合成尿的重量。
根据本发明,可将油施用于纤维,或可供选择地,油可被施用于吸收材料上。然后将油处理的纤维或油处理的超吸收性材料分别与未处理的超吸收性材料或未处理的纤维混合,形成吸收制品,这将在下面更详细地描述。油处理的纤维和油处理的超吸收性材料也可混合形成吸收制品。
将油施用于纤维的具体方法不是很重要。将油施用于纤维的技术实例包括使用凹版类型的辊式涂布机来涂布纤维网。可供选择地,油可被喷涂到纤维网,或纤维可浸渍在油浴中。当纤维网被破碎,如在锤磨机中被破碎时,那么油也可被加入到纤维中。施用于纤维的油量应足够多以达到本发明的超吸收性材料的保留,但不能太多,以免对纤维的流体吸收性产生显著的不利效果,所述流体吸收性包括例如流体吸收速率或被纤维网吸收的流体量。吸收制品制造商希望这些吸收结构的流体吸收性类似于他们正在考虑替换的吸收结构的流体吸收性,所述吸收制品包括含有本发明的油处理的纤维或油处理的超吸收性材料的吸收结构。理想地,吸收结构的流体吸收性至少与通过未处理纤维制备的类似吸收结构的流体吸收性一样令人满意。施用于纤维上的油量也不能过大,以免它不利地影响油处理的纤维网的纤维化。施用于纤维上的合适油量包括按烘干的纤维重量计约0.5重量%至约20重量%的油。较窄的使用范围是按烘干的纤维重量计1.0重量%至约15重量%,甚至更窄的使用范围是按烘干的纤维重量计1.0重量%至约10重量%。
施用有油的纤维形式可以变化。如果使用辊式涂布机,纤维可以为纤维板形式。油可被施用于湿法纤维板,其基重为至少350克/平方米,密度为至少约400千克/立方米。
可以加入纯油,或它可以用溶剂稀释,所述溶剂在油施用于纤维后蒸发。溶剂不应不利地影响超吸收性材料与纤维的附着、或吸收制品的流体吸收性和流体保留性,所述吸收制品包含油处理的纤维。
在油被施用于超吸收性材料的实施方案中,施用方法仍是不重要的。油可被喷涂到超吸收性材料上,或将超吸收性材料浸渍在油浴中。
施用于超吸收性材料上的油量应足以使油处理的超吸收性材料在与纤维混合时与纤维附着,但不应过多,以免一旦油处理的SAP混杂在其中时,所述油量对纤维网的流体吸收性和流体保留性产生严重的不利影响。另外,所使用的油量不应过大,以免它对超吸收性材料本身的吸收性产生显著的不利影响。施用于超吸收性材料上的合适油量按超吸收性材料的重量计为约0.01重量%至小于10重量%的油。
油处理的纤维和未处理的超吸收性材料、油处理的超吸收性材料和未处理的纤维、或油处理的纤维和油处理的超吸收性材料可被混合,然后按如下方式制成吸收结构。下列描述涉及纤维和超吸收性材料。应理解,下列描述适用于如下情况:其中油处理的纤维与未处理的超吸收性材料混合,未处理的纤维与油处理的超吸收性材料混合,或油处理的纤维与油处理的超吸收性材料混合。通过纤维化装置如锤磨机将没有颗粒的纤维卷或纤维包纤维化。单根化纤维被空气夹带,在这段时间内可将超吸收性材料加入其中。然后将加气的纤维化纤维和超吸收性材料递送至气流成网装置,如小型成型机,制成所需形状。将所形成的衬垫从气流成网装置中除去,以便进一步处理。所形成的衬垫为纤维网或纤维块形式,用作吸收制品如上述讨论的那些产品中的吸收结构。纤维网或纤维块的基重为约0.01至约0.05g/cm2,厚度为约0.3-2mm,密度为0.15至约1g/cm3。
应理解,在可供选择的实施方案中,油可被施用于纤维和超吸收性材料的混合物上,此时纤维和超吸收性材料一起被气流夹带。
可在很宽范围的湿度条件下混合纤维和超吸收性材料。为了在吸收制品内保留超吸收性材料,所述吸收制品包括纤维和超吸收性材料,不要求在混合这两个组分时保持任意特定的湿度水平。在相对湿度水平低于约70%、低于约60%、甚至低于约50%的条件下,可实现令人满意的保留率。
如下面的实施例所说明的,根据本发明将油添加到纤维或超吸收性材料中不会显著影响由此形成的吸收结构的流体吸收性和流体保留性。尽管存在疏水油,本发明的吸收结构可吸收和保留流体。根据本发明制造的吸收结构是柔软和挠性的。
下列实施例用于说明本发明的某些具体实施方案,但不是限制本
发明的范围。
实施例1 纤维的油处理
南方松树绒毛浆板,得自Weyerhaeuser Company,NB416规格,起始水分含量按浆板总重量计为6%,将其在Black Brothers凹版型辊式涂布机中涂以矿物油。该矿物油为USP矿物油,购自Rite Aidpharmacy,标签为“Rite Aid Mineral OIL USP”,CAS编号8020-83-5和8012-95-1,可供选择的CAS编号为39355-35-6、79956-36-8和83046-05.3。凹版涂布机将矿物油的均匀涂层施用于浆板的一侧的整个表面上,由此它被浆板快速吸收。矿物油被施用于浆板,其比率按重量计为10.5份矿物油比100份烘干的浆粕。被处理的板在塑料拉链包内在室温下储存24小时,使加入的油在板内迁移。然后将浆板在锤磨机内纤维化,与超吸收性材料(得自Stockhausen,SXM77规格)混合,然后递送至小型成型机中,该成型机类似于在制备尿布和女性卫生产品时常规使用的小型成型机,所述成型机可制备的衬垫的目标纤维基重为每平方米300克,超吸收性材料的基重为每平方米200克。小型成型机运行时的成型速率为每分钟18个衬垫。在运行开始时,相对湿度为39%,在运行结束时相对湿度为31%。起始温度为约16.5℃,运行结束时温度上升至约22.5℃。
收集一些所得的衬垫,进行Rotap试验。将其它衬垫压实到0.25cc/gm,并根据上述技术进行马鞍型芯吸试验。在Rotap试验中,将衬垫振动两分钟。在马鞍型芯吸试验中,使用合成尿,三次进料量为100ml、50ml和50ml。结果以RP-SO描绘于图1、2和3,
对照实施例1
对于这个对照实施例,使用与实施例1的类型相同的纤维和超吸收性材料,但没有矿物油施用于纤维,从而制得衬垫。使用与实施例1相同的条件制备本对照实施例的衬垫。将收集的衬垫进行Rotap试验和马鞍型芯吸试验,使用与实施例1相同的试验条件。结果以NB416描绘于图1、2和3。
对照实施例2
在这个对照实施例中,使用市售的改性浆,其得自WeyerhaeuserCompany,商品名为RP-S4,由此得到这些纤维和与实施例1所述相同的超吸收性材料的衬垫。RP-S4包含用许多试剂处理过的木浆纤维,所述试剂包括具有至少两个氢键或配位共价键形成官能团或这些官能团的组合的分子,所述分子包含在纤维上以使超吸收性材料附着于纤维。使用与实施例1相同的条件来制备衬垫。将收集的衬垫进行Rotap试验和马鞍型芯吸试验,使用与实施例1所述相同的条件。结果以RP-S4描述于图1、2和3。
结果说明,通过本发明的油处理的纤维与超吸收性材料混合所制备的吸收制品可保留超吸收性材料,其保留量与根据对照实施例制备的衬垫的保留量相同或比后者更多。另外,结果说明,在含有油的情况下,根据本发明所制备的吸收制品与根据对照实施例制备的衬垫相比具有类似的流体吸收速率和流体保留水平。
尽管已说明和描述了本发明的优选实施方案,但是应理解,在不背离本发明的精神和范围的情况下,可对此作出许多变化。
Claims (19)
1.一种吸收含水流体的制品,所述制品包括:
纤维素纤维;
超吸收性材料;和
施用于纤维素纤维或超吸收性材料的油。
2.如权利要求1所述的制品,其中油的熔点低于约25℃。
3.如权利要求1所述的制品,其中油包括甘油三酯。
4.如权利要求1所述的制品,其中油为脂肪酸。
5.如权利要求1所述的制品,其中油为橄榄油、大豆油、红花油、棉籽油、亚麻子油、桐油、蓖麻油、椰子油、低芥酸菜子油、玉米油或霍霍巴油。
6.如权利要求1所述的制品,其中油为饱和的或不饱和的链烷烃、链烯烃、链炔烃、环烷烃、环烯烃、环炔烃或其组合。
7.如权利要求1所述的制品,其中油得自石油。
8.如权利要求7所述的制品,其中油选自矿物油、十六烷、角鲨烷和角鲨烯。
9.如权利要求1所述的制品,其中油存在于纤维上,其存在量按烘干的纤维重量计为约0.5重量%至20重量%
10.如权利要求1所述的制品,其中油存在于超吸收性材料上,其存在量按超吸收性材料的重量计为约0.01重量%至小于10重量%。
11.处理过的纤维,所述纤维包括:
纤维素纤维;和
施用于纤维的油,所述油的熔点低于其被施用于所述纤维时的温度。
12.如权利要求11所述的处理过的纤维,其中纤维素纤维为木浆纤维。
13.如权利要求11所述的处理过的纤维,其中油得自石油。
14.如权利要求11所述的处理过的纤维,其中油包括甘油三酯。
15.处理过的超吸收性材料,所述处理过的超吸收性材料包括:
超吸收性材料;和施用于超吸收性材料的油,所述油的熔点低于其被施用于所述超吸收性材料时的温度。
16.如权利要求15所述的处理过的超吸收性材料,其中油得自石油。
17.如权利要求15所述的处理过的超吸收性材料,其中油包括甘油三酯。
18.一种在纤维素纤维网内保留超吸收性材料的方法,所述方法包括:
提供施用有油的纤维素纤维,所述油的熔点低于其被施用于所述纤维时的温度;和
将超吸收性材料与油处理的纤维素纤维接触。
19.一种在纤维素纤维网内保留超吸收性材料的方法,所述方法包括:
提供施用有油的超吸收性材料,所述油的熔点低于其被施用于所述超吸收性材料时的温度;和
将纤维素纤维与油处理的超吸收性材料接触。
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-
2003
- 2003-08-05 US US10/635,062 patent/US20050031841A1/en not_active Abandoned
-
2004
- 2004-03-02 EP EP20040251200 patent/EP1504770A1/en not_active Withdrawn
- 2004-03-09 CL CL2004000459A patent/CL2004000459A1/es unknown
- 2004-03-12 AR ARP040100812 patent/AR043576A1/es not_active Application Discontinuation
- 2004-03-12 CN CNA2004100284974A patent/CN1580382A/zh active Pending
- 2004-03-12 RU RU2004107295/12A patent/RU2004107295A/ru not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
RU2004107295A (ru) | 2005-09-27 |
AR043576A1 (es) | 2005-08-03 |
US20050031841A1 (en) | 2005-02-10 |
EP1504770A1 (en) | 2005-02-09 |
CL2004000459A1 (es) | 2005-01-07 |
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