CN1153867C - 用于多孔疏水聚合物基底上的耐久亲水涂料 - Google Patents
用于多孔疏水聚合物基底上的耐久亲水涂料 Download PDFInfo
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- CN1153867C CN1153867C CNB971954879A CN97195487A CN1153867C CN 1153867 C CN1153867 C CN 1153867C CN B971954879 A CNB971954879 A CN B971954879A CN 97195487 A CN97195487 A CN 97195487A CN 1153867 C CN1153867 C CN 1153867C
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Abstract
一种由基本均匀地涂布了亲水聚合物材料的疏水聚合物构成的涂层多孔基底。该基底可以是片状材料,如泡沫体、纤维及纤网。该纤网是非织造纤网。基底上的涂层可耐受温度约10℃~约50℃的含水介质,且不显著降低涂层多孔基底可能接触到的含水介质的表面张力。该疏水聚合物可以是聚烯烃,如聚乙烯或聚丙烯。涂布在聚合物纤维上的亲水聚合物材料可以是多糖或改性多糖。还提供一种制备涂层多孔基底的方法,它涉及提供由疏水聚合物组成的多孔基底。 然后,让多孔基底的至少一部分暴露在活性组分的场中。将多孔基底的至少一部分,包括已在活性组分场中暴露过的那部分,置于足以在多孔基底上基本均匀地涂布上亲水聚合物材料的条件下接受包含水和亲水聚合物材料的混合物的处理。
Description
发明领域
本发明涉及涂层聚合物基底。
聚合物广泛用于制作,包括吹胀及流延薄膜、挤塑片材、注塑制品、泡沫塑料、吹塑制品、挤塑管材、单丝及非织造纤网在内的各种产品。这些聚合物中的某些如聚烯烃,为本质疏水的,而对许多用途来说,这一性质或者是有利的属性,或者至少不是个缺点。
然而,还有若干聚合物应用领域,其疏水性本质则或者限制了其应用,或者需要花些力气来改变由它们制成的成形制品的表面特性。例如,以诸如聚乙烯和聚丙烯之类的聚烯烃制作织物,这类聚合物织物被用于制作诸如尿布、妇女卫生用品、失禁用品、训练裤、揩布之类的用即弃吸收制品。这类聚合物织物通常是采用如熔喷、共成型及纺粘等方法制备的非织造纤网。经常的情况是,要求这种聚合物织物能够被水或水基液体所润湿。可湿性可通过在非织布成形期间或成形之后,在其上喷洒或借其他方式涂上(如表面处理或局部处理)表面活性剂溶液,然后将纤网干燥来获得。
一些较为常见的局部施涂表面活性剂有:非离子表面活性剂,如聚氧乙基化辛基苯酚以及氧化丙烯与丙二醇的缩合产物,这不过是举例说明而已。这些表面活性剂在将常态为疏水的聚合织物转变为水可湿的用途上是有效的。然而,表面活性剂经常是在仅经过与含水液体接触一次之后便很容易脱落。这些表面活性剂是依靠降低含水液体的表面张力,达到有效地使疏水聚合物织物转变为可湿的目的。这种机理必然涉及至少一部分表面活性剂从构成非织布的纤维表面上脱除。
可见,需要一种涂层多孔疏水基底,它具有耐久涂层,这种涂层是水可湿的,却又不显著降低该涂层基底可能接触到的含水介质的表面张力。
发明概述
本发明通过提供一种由疏水聚合物构成的涂层基底来解决上述的某些困难和问题。基底的表面基本上均匀地涂布了一种亲水聚合物材料。该疏水聚合物,仅作为例子,可以是聚烯烃。例如,该聚烯烃可以是聚乙烯或聚丙烯。
该亲水聚合物材料涂层可耐受温度约10℃~约50℃的含水介质。而且,该亲水聚合物材料涂层不显著降低该基底可能接触到的含水介质的表面张力。在特定的实施方案中,聚合物材料涂层的亲水性可按照控制的方式沿基底的至少一个尺寸方向变化。
举例说,该基底可以是片状材料,如发泡材料片。该片状材料还可是纤维网,如织造或非织造布或纤网。希望该纤网是非织造纤网。
还是举例说明,该亲水聚合物材料可以是聚糖。作为另一个例子,该聚合物材料可以是改性的聚糖。当亲水聚合物材料是聚糖时,它可以包含多种疏水基团和多种亲水基团。疏水基团可以是聚糖主链中的=CH-及-CH2-基团。疏水基团适合为它本身所在聚合物提供对构成多孔基底的疏水聚合物的亲和性,而亲水基团则适合使它所在的聚合物变成亲水的。
当该聚合物材料是改性的聚糖时,疏水基团可以是聚糖主链或侧基中的=CH-及-CH2-基团。亲水基团也可是侧基。仅作为举例,改性聚糖可以是改性纤维素。例如,该疏水基团可以是一价烷基侧基,如乙基基团。作为另一个例子,该亲水基团可以是一价羟烷基侧基,如羟乙基基团。
本发明的涂层多孔基底可用作用即弃吸收制品的一种构成材料。用即弃吸收制品的例子,仅举例说明,包括尿布;训练裤;妇女卫生用品,如卫生巾及止血棉塞;失禁用品;手术罩衣;手术围裙;揩布等。
本发明还提供制备涂层多孔基底的方法,它包括:提供一种多孔疏水聚合物基底,并该基底的至少一部分暴露于活性组分的场中。随后让基底的至少一部分,包括暴露于活性组分场中的那部分,接受包含水与上述亲水聚合物材料的混合物的处理,处理条件应足以使多孔基底表面基本均匀地涂布上该亲水聚合物材料。该亲水聚合物材料涂层可耐受温度约10℃~约50℃的含水介质,且该涂层不显著降低该涂层多孔基底可能接触到的含水介质的表面张力。例如,此种含水介质的表面张力降低值应小于约10%。
该活性组分的场,例如可以是电晕场。该活性组分场,同样是举例说明,还可以是等离子场。活性组分的场强可沿着基底的至少一个尺寸方向按照控制的方式变化。
希望的话,可在用包含水及亲水聚合物材料的混合物处理该多孔基底的至少一部分之后,再让基底的一部分暴露于上述活性组分场中。
附图简述
图1是一幅流出量,毫升,及流出液体表面张力,达因/厘米,分别对按照本发明涂层的非织布洗涤循环次数所作的图。
图2是在一个实例中所使用的分段电极电晕放电设备的分段电极示意图。
图3是具有不同可湿性和/或芯吸特性区的基底示意图。
发明详述
本文所使用的术语“多孔疏水聚合物基底”意在涵盖任何只要是多孔的,而且全部或部分地由疏水聚合物构成的成形制品。例如,该基底可以是片状材料,如发泡材料片。该片状材料还可是纤维网,如织造或非织造布或纤网。该基底还可包括疏水聚合物纤维本身,或已被成形为纤网的疏水聚合物纤维。希望该纤网是非织造纤网,例如包括但不限于,熔喷纤网或纺粘纤网。该基底还可以是2层或更多层片状材料的层合物。例如,这些层可独立地选自熔喷纤网和纺粘纤网。然而,也可以使用其他片状材料来附加到或替代熔喷和纺粘纤网。另外,层合物的各个层可以用相同疏水聚合物或用不同疏水聚合物制造。
本文所使用的术语“疏水聚合物”是指任何不能或不容易被水润湿的聚合物,就是说,它缺乏对水的亲和性。疏水聚合物的例子,仅举例说明,包括聚烯烃,如聚乙烯、聚(异丁烯)、聚(异戊二烯)、聚(4-甲基-1-戊烯)、聚丙烯、乙烯-丙烯共聚物、乙烯-丙烯-己二烯共聚物以及乙烯-乙酸乙烯酯共聚物;苯乙烯聚合物,如聚(苯乙烯)、聚(2-甲基苯乙烯)、含少于约20%(摩尔)丙烯腈的苯乙烯-丙烯腈共聚物以及苯乙烯-甲基丙烯酸2,2,3,3-四氟丙基酯共聚物;卤代烃聚合物,如聚(三氟氯乙烯)、三氟氯乙烯-四氟乙烯共聚物、聚(六氟丙烯)、聚(四氟乙烯)、四氟乙烯-乙烯共聚物、聚(三氟乙烯)、聚(氟乙烯)及聚(亚乙烯氟);乙烯基聚合物,如聚(丁酸乙烯酯)、聚(癸酸乙烯酯)、聚(十二烷酸乙烯酯)、聚(十六烷酸乙烯酯)、聚(己酸乙烯酯)、聚(丙酸乙烯酯)、聚(辛酸乙烯酯)、聚(七氟异丙氧基乙烯)、聚(七氟异丙氧基丙烯)及聚(甲基丙烯腈);丙烯酸聚合物,如聚(乙酸正丁酯)、聚(丙烯酸乙酯)、聚(丙烯酸(1-氯二氟甲基)四氟乙基酯)、聚(丙烯酸二(氯氟甲基)氟甲基酯)、聚(丙烯酸1,1-二氢七氟丁基酯)、聚(丙烯酸1,1-二氢五氟异丙基酯)、聚(丙烯酸1,1-二氢十五氟辛基酯)、聚(丙烯酸七氟异丙基酯)、聚(丙烯酸5-(七氟异丙氧基)戊基酯)、聚(丙烯酸1,1-(七氟异丙氧基)十一基酯)、聚(丙烯酸2-(七氟丙氧基)乙基酯)以及聚(丙烯酸九氟异丁基酯);甲基丙烯酸聚合物,如聚(甲基丙烯酸苄基酯)、聚(甲基丙烯酸正丁基酯)、聚(甲基丙烯酸异丁基酯)、聚(甲基丙烯酸叔丁基酯)、聚(甲基丙烯酸叔丁基氨基乙基酯)、聚(甲基丙烯酸十二烷基酯)、聚(甲基丙烯酸乙基酯)、聚(甲基丙烯酸2-乙基己基酯)、聚(甲基丙烯酸正己基酯)、聚(甲基丙烯酸苯基酯)、聚(甲基丙烯酸正丙基酯)、聚(甲基丙烯酸十八基酯)、聚(甲基丙烯酸1,1-二氢十五氟辛基酯)、聚(甲基丙烯酸七氟异丙基酯)、聚(甲基丙烯酸十七氟辛基酯)、聚(甲基丙烯酸1-氢四氟乙基酯)、聚(甲基丙烯酸1,1-二氢四氟丙基酯)、聚(甲基丙烯酸1-氢六氟异丙基酯)及聚(甲基丙烯酸九氟叔丁基酯);以及聚酯,如聚(对苯二甲酸乙二醇酯)及聚(对苯二甲酸丁二醇酯)。
本文所使用的术语“聚烯烃”是指由仅含碳和氢原子的单或多不饱和单体经加成聚合制备的聚合物。该聚烯烃的例子包括聚乙烯、聚丙烯、聚(1-丁烯)、聚(2-丁烯)、聚(1-戊烯)、聚(2-戊烯)、聚(3-甲基-1-戊烯)、聚(4-甲基-1-戊烯)等。另外,该术语还涵盖两种或更多种聚烯烃的共混物以及由两种或更多种不同不饱和单体制备的无规及嵌段共聚物。由于其在商业上的重要性,最合意的聚烯烃是聚乙烯及聚丙烯。
该疏水聚合物还可含有技术上惯用的少量添加剂。例如,该疏水聚合物可含有颜料、消光剂、抗氧剂、抗静电剂、稳定剂、除氧剂等。
本文在提到多孔基底上的亲水聚合物材料涂层时所使用的术语“耐久”是指,该涂层多孔基底在经过至少3次暴露于诸如水、盐水及尿及其他体液之类的含水介质之后仍保持为可润湿的。
当多孔基底是纤网时,一种评价耐久性的程序是,在进行了修改的流出试验之后,继而进行洗涤和干燥(一次洗涤/干燥循环)。典型地说,纤网在至少经5次--暴露、洗涤并干燥--的循环之后仍应保持为可润湿的。希望纤网在经过至少10次循环之后仍保持为可润湿的。
流出试验(暴露)及洗涤/干燥程序可见诸于授予Meirowitz等人的美国专利5,258,221,该文收入本文作为参考。就典型而言,将大体呈矩形,8英寸×15英寸(约20厘米×38厘米)的例如非织造纤网的纤维网试样,固定在由聚丙烯、木浆纤维和/或超吸收剂材料组成的吸收芯上面。将得到的试验组件对中地放在一倾斜表面上,并用胶粘带在组件的每一个角处予以恰当地固定。倾斜表面的角度为45°,而不是该专利中所述的30°。将一个漏斗放在距试验组件的底或下边缘约7.8英寸(约200毫米)处。漏斗的阀门位于试验组件上表面的上方约10毫米处。将100毫升温度为35℃的水装入漏斗。将漏斗阀门打开,让水在约15秒钟的时间内分布到试样上。测定并记录溢出并收集在收集器皿中的水量。如果在收集器皿中收集到的水量少于就给定类型纤网来说为恰当的数量,则通常就认为该纤网通过了该修改的流出试验。例如,当纤网为轻薄(例如单位重量为0.6盎司/平方码或约20克/平方米)的纺粘非织造纤网时,则收集到的水量应少于20毫升。
本文的洗涤/干燥循环所做的修改是,使用500毫升,而不是1升的室温水(约23℃)。于是,将大体矩形的上述涂层多孔基底试样置于500毫升水中。让试样在水中维持1分钟,此间用机械振动器以15~20rpm的速率维持搅拌。将试样从水中取出,挤去多余的水并令其流回到洗水容器中。让试样风干过夜,然后再接受如上述修改的流出试验。重复该过程,直至达到要求的次数。测定每次洗涤/干燥循环之后的洗水表面张力,其中每次循环均采用淡水洗涤。水的表面张力系按照ASTM试验方法D 1590-60,用Fisher张力仪(Fisher科学公司,匹兹堡,宾夕法尼亚)测定的。
本文所使用的术语“亲水聚合物”是指,该聚合物材料具有表面自由能,以致该聚合物材料可以被含水介质润湿。就是说,含水介质能够将涂布在多孔基底上的亲水聚合物材料打湿。例如,该亲水聚合物材料的表面自由能至少为约50达因/厘米。作为另一个例子,该亲水聚合物材料的表面自由能可为约50~约72达因/厘米。
本文所使用的术语“含水介质”是指任何以水为主要成分的液体介质。因此该术语包括水本身、水溶液和水分散体。因此,含水介质可以是从人体排出的液体介质,如尿、月经和唾液。
本文所使用的术语“可润湿”及其变换表述是指可被含水介质润湿,即,水介质可在基底表面上散开。该术语与术语“水可湿”及其变换彼此通用,二者有相同的含义。
本文所使用的术语聚合物材料对多孔疏水聚合物基底为“亲和”是指,就典型而言,亲水聚合物材料,在基底经第一次暴露于活性组分场中之后,便基本均匀地涂布在基底上(即达到使涂层基底能够充分地被含水介质润湿的程度)。术语“部分亲和”是指,聚合物材料只能部分地涂布到多孔基底上。部分亲和的功能后果是,其涂层多孔基底仅为部分可润湿。
本文所使用的术语“一价烷基”是指含有1~约6个碳原子的一价烷基。一价烷基的例子,仅作为举例说明,包括甲基、乙基、1-丙基、异丙基、1-丁基、2-丁基、叔丁基、1-戊基、2-戊基、3-戊基、2-甲基-2丁基、3-甲基-2丁基、1-己基、2-己基、3-己基、4-己基、2,2-二甲基丁基、2,3-二甲基丁基、2-甲基戊基、3-甲基戊基、3-乙基-2-丁基等。
本文所使用的术语“一价羟烷基”是指其氢原子被羟基取代了的上述一价烷基。一价羟烷基的例子,还是举例说明,包括羟乙基、2-羟丙基、3-羟丙基、1-羟基-2-丙基、4-羟丁基、3-羟丁基、2-羟丁基、4-羟基-2-丁基、3-羟基-2-丁基、2-羟甲基-2-丙基、5-羟戊基、4-羟戊基、3-羟戊基、2-羟戊基、5-羟基-2-戊基、4-羟基-2-戊基、3-羟基-2-戊基、5-羟基-3-戊基、4-羟基-3-戊基、2-羟甲基-2-丁基、3-羟甲基-2-丁基、3-甲基-1-羟基-2-丁基、6-羟己基、4-羟基-2-己基、1-羟基-3-己基、2-羟基-4-己基、2,2-二甲基-4-羟丁基、2,3-二甲基-1-丁基、2-羟甲基-戊基、2-甲基-4-羟戊基、3-(2-羟乙基)-2-丁基等。
本文在针对一价烷基和羟烷基所使用的术语“侧基”是指,该基团连接在聚合物主链上但不构成主链的一部分。因此,脱除侧基将不改变主链的化学结构。
如上所述,本发明的涂层多孔基底可包含疏水聚合物纤维。此种纤维被基本均匀地涂布上了亲水聚合物材料。作为例子,该疏水聚合物纤维可以是聚烯烃纤维。例如,该聚烯烃纤维可以是聚乙烯或聚丙烯纤维。
该疏水聚合物纤维一般地可采用任何已知方法制备。然而在实际实施上,该纤维通常是由熔融挤出法成形为纤网如非织造纤网而制成的。当应用到非织造纤网上所使用的术语“熔融挤出法”意在涵盖,用任何一种按熔融挤出法成形为非织造纤网从而制成的非织造纤网,其中熔融挤出成形为纤维之后,接着进行纤网成形,后者的典型情况是,在多孔支持物上同方向地进行。该术语特别包括诸如熔喷、共成型、纺粘之类众所周知的方法。仅作为举例说明,此类方法的例子可参见以下的参考文献:
(a)熔喷法参考文献,仅作为例子包括:授予R.W.Perry,Jr.的美国专利3,016,599、授予J.S.Prentice的3,704,198,授予J.P.Keller等人的3,755,527、授予R.R.Butin等人的3,849,241、授予R.R.Butin等人的3,978,185以及授予T.J.Wisneski等人的4,663,220。还可参见V.A.Wente,“超细热塑性纤维”,《工业及工程化学》,第48卷,第8期,1342~1346页(1956);V.A.Wente等人,“超细有机纤维的制造”,海军研究实验室,华盛顿特区,NRL报告4364(111437),日期1954年5月25日,美国商业部,技术服务办公室;以及Robert R.Butin与Dwight T.Lohkamp,“熔喷--新型非织造产品的-步成网法”,《浆粕及造纸工业技术协会会刊》,第56卷,第4期,第74~77页(1973);
(b)共成型的参考文献包括,授予R.A.Anderson等人的美国专利4,100,324及授予E.R.Hauser的4,118,531;以及
(a)纺粘法参考文献包括,特别是授予Kinney的美国专利3,341,394、授予Dorschner等人的3,655,862、授予Dorschner等人的3,692,618、授予Dobo等人的3,705,068、授予Matsuki等人的3,802,817、授予Porte的3,853,651、授予Akiyama等人的4,064,605、授予Harmon的4,091,140、授予Schwartz的4,100,319、授予Appel和Morman的4,340,563、授予Appel和Morman的4,405,297、授予Hartman等人的4,434,204、授予Greiser和Wagner的4,627,811以及授予Fowells的4,644,045。
当然,还知道其他制备非织造纤网的方法,而且也可使用。这些方法包括气流铺网、湿法铺网、梳理成网等。在某些情况下,或者希望或者出于需要,可采用已知的方法将非织造纤网稳定化,例如采用热点粘合、穿透空气粘合以及水力缠结。除了非织造纤网之外,该疏水聚合物纤维还可以是连续长丝或短纤维以及用此种连续长丝或短纤维制成的机织或针织织物等形式。
该疏水聚合物材料的涂层可耐受温度约10℃~约50℃的含水介质,且不显著降低可能与纤网接触的含水介质的表面张力。例如,使该含水介质的表面张力降低值不超过约10%。
仅举例说明,该亲水聚合物材料可以是聚糖。该聚糖可包含多种疏水基团或多种亲水基团。疏水基团可以是包含在聚糖主链中的=CH-和-CH2-基团。该疏水基团适合为聚合物材料提供对构成多孔基底的疏水聚合物的亲和性,而亲水基团适合使聚合物材料变为亲水的。聚糖的例子,如包括天然树胶,如琼脂、琼脂糖、角叉藻聚糖、帚叉藻聚糖、藻酸盐、角豆胶(locust bean)、***胶、瓜尔胶、魔芋胶及刺梧桐树胶;微生物发酵产物,如明胶聚糖(gellan)、呫吨聚糖(xanthan)胶及葡聚糖胶;纤维素,如微晶纤维素;以及动物制品,如透明质酸、肝素、壳多酸以及脱乙酰壳多酸。
还是仅作为举例说明,该亲水聚合物材料可以是改性的聚糖。改性聚糖也可以包含多种疏水基团和多种亲水基团。疏水基团可以是聚糖主链中的=CH-和-CH2-基团或侧基。亲水基团也可以是侧基。同样,疏水基团适合用来为聚合物材料提供对构成多孔基底的疏水聚合物的亲和性,而亲水基团适合用来使聚合物材料变为亲水的。仅举例说明,改性聚糖的例子包括改性纤维素或纤维素衍生物,如羟乙基纤维素、羟丙基纤维素、甲基纤维素、乙基纤维素、甲基羟丙基纤维素、乙基羟乙基纤维素及羧甲基纤维素;淀粉和果胶衍生物,如羧甲基淀粉、淀粉醛及果胶酸盐;以及动物制品衍生物,如羧甲基壳多糖及羧甲基脱乙酰壳多酸。
特别有用的聚糖和改性聚糖类型,作为例子,包括琼脂、藻酸盐;以及改性纤维素,如乙基羟乙基纤维素。在改性聚糖中,特别是在有用类型的改性聚糖中,仅举出那些其疏水基团是一价烷基侧基的。例如,此种疏水基团可以是甲基或乙基基团。作为另一个例子,亲水基团可以是一价羟烷基侧基。作为另一个的例子,例如该亲水基团可以是羟乙基基团。
最后,聚合材料涂层的亲水性可按照控制的方式沿涂层多孔基底的至少一个尺寸方向变化。例如,涂层多孔基底的中央区域可具有较高的亲水性,它沿着例如基底长度方向延伸,到了中央区域的两侧,亲水性就较低了。因此,此种基底的亲水性将可沿其幅宽方向按照控制的方式变化。其他各种在本发明范围内的变换方案,对于本领域技术人员则是显而易见了。
下面,来讨论涂层多孔基底的制备方法,它涉及提供多孔疏水聚合物基底,并让基底的至少一部分暴露于活性组分的场中。随后,至少一部分基底,包括在活性组分的场中暴露过的那部分,在足以使多孔基底表面基本均匀地涂布上亲水聚合物材料的条件下接受包含水与上述亲水聚合物材料的混合物的处理。该亲水聚合物材料涂层可耐受温度约10℃~约50℃的含水介质,且该涂层不显著降低该涂层多孔基底可能接触到的含水介质的表面张力。例如,此种含水介质的表面张力降低值应小于约10%。在某些情况下,使多孔基底上的涂层发生交联,以便赋予其满意程度的耐久性可能是有益或必要的。
活性组分的场起到提高亲水聚合物材料对多孔疏水聚合物基底亲和力的作用。举例说,该活性组分的场可以是电晕放电场。作为另一个例子,该活性组分的场可以是等离子场。不拟囿于理论,本发明人相信,多孔疏水聚合物基底暴露于活性组分场中,造成基底表面的改变,从而暂时提高了基底的表面自由能。而这,又使得处理溶液得以进一步渗透到多孔基底的内部;就是说,该多孔基底得以被处理溶液所饱和。
虽然让多孔疏水聚合物基底暴露于活性组分场是暂时提高基底表面自由能的合意方法,但是也可以使用其他程序。例如,可以用臭氧处理多孔基底,或是让其通过一种氧化性溶液,如含有三氧化铬及硫酸的溶液。然而,在使用此类其他程序时应小心防止或尽量减少多孔基底的降解。
可让活性组分的场强按照控制的方式沿纤网的至少一个尺寸方向变化。在以亲水聚合物材料涂布了多孔基底之后,该涂层的亲水性大小将与该场强成正比。因此,该聚合物材料涂层的亲水性将按照控制的方式沿该纤网的至少一个尺寸方向变化。
活性组分的场强可采用已知的手段以控制的方式方便地予以改变。例如,可采用装有分段电极的电晕设备,其中每一段电极与待处理样品的距离可独立地改变。作为另一个例子,可采用电极***的间隙呈梯度变化的设备;在这种情况下,一个电极可围绕垂直于该电极长度方向的轴线旋转。还可采用其他方法,例如可参见,“以射频等离子放电形成连续可湿性梯度”,W.G.Pitt,《胶体界面科学杂志》,第133卷,第一期,223页(1989);以及“以电晕放电处理制备可湿性梯度变化的表面”,J.H.Lee等人,《生物材料协会十七届年会文集》,1991年5月1~5日,第133页,Scottsdale,亚利桑纳。
希望的话,可在以包含水和聚合物材料的混合物处理多孔基底的至少一部分之后,再让多孔基底的至少一部分暴露于活性组分的场中。此种后暴露通常可提高该涂层多孔基底的亲水性。而该后暴露中的活性组分场强也可如上面已描述的那样,沿该纤网的至少一个尺寸方向按控制的方式变化。此种后暴露通过交联作用可进一步提高涂层的耐久性。
下面,通过实施例进一步说明本发明。然而,这些实施例从任何意义上均不构成对本发明精神和范围的限制。
实例1
0.6盎司/平方码或osy(约20克/平方米或gsm)聚丙烯纺粘非织布(非织布A)在环境条件下接受电晕放电处理。电晕放电的场强为24瓦/平方英尺/分钟(约1.6焦耳/平方厘米)。在电晕处理之后,紧接着将织物浸渍在0.25%(重量)乙基羟乙基纤维素水溶液(Bermocol E481,Akzo Nobel公司)中,以下称作涂料A。等织物完全吸饱后,这一点可通过颜色由白变为半透明来判断,让织物通过Atlas实验室用轧水机的两个橡胶辊之间,在10磅(约4.5千克)的辊隙压力下轧干。随后,将该涂层非织布置于60℃的烘箱中干燥约30分钟。
通过将水滴在织物的表面可定性地考验涂层织物的吸水性。观察到水被瞬间吸收,就说明织物基本均匀地涂布上了乙基羟乙基纤维素(涂料A)。
试验了织物上涂层的耐久性;即按上面所描述的修改的流出试验程序,让布反复多次接触水。数据总括在表1中。除耐久之外,本发明的涂层还不降低与涂层非织布接触的液体的表面张力。为了证明确实如此,在每一次耐久性试验循环完毕之后,测定了流出水的表面张力。结果总括在表1中。
表1
流出/洗涤试验结果一览
循环序号 流出量(毫升) 表面张力a
0 0 67
1 1.2 66
2 0 67
3 0.5 67
4 2.0 67
5 1.0 66
6 3.0 66
7 2.0 67
8 2.5 66
9 1.5 66
10 2.0 66
a洗水的表面张力,达因/厘米。
为了更直观地揭示表中的数据,将洗水的流出量(左边y轴)及表面张力(右边y轴)分别对洗涤循环次数进行作图。作图情况如图1中所示。曲线清楚地表明,以乙基羟乙基纤维素涂布的织物能耐受多次以100毫升水的处理。
作为比较,在织物上涂布了典型的表面活性剂(例如,一种聚氧乙烯化辛基苯酚TrintonX-102),织物在多次接触水的过程中表现不佳,因为表面活性剂经过第一次暴露在水中之后便基本上被洗掉了。例如,在未用过的织物A上涂以TrintonX-102,然后令其接受修改的流出试验程序的处理。第一次洗涤之前的流出量为2毫升,然而经第一次洗涤之后,流出量就变为了90毫升。
图1也表明,洗水的表面张力实际上未发生变化。而另一方面,从TrintonX-102处理的织物的洗水上,则观察到表面张力的显著下降。举个例子,来自对以TrintonX-102处理的织物第一次洗涤的水的表面张力为54达因/厘米,与原使用水的表面张力相比,降低了约20%(见表1)。
实例2
重复实例1的涂布程序,不同的是,采用另外2种非织布,即织物B和C,并采用了另外一种乙基羟乙基纤维素(EHM100,AkzoNobel公司),以下称之为涂料B。织物B是由50/50偏心皮芯双组分1.3旦(0.14特)纤维组成的纺粘纤网。纤维芯由3445型聚丙烯(埃克森美洲化学公司,休斯顿,德克萨斯77079),皮由Aspun6811A线型低密度聚乙烯(陶氏化学公司)组成。每一种组分各包含2%(重量)Ampacet 41438二氧化钛。织物C是1.5osy(约51gsm)熔喷纤网,由Himont PF 015聚丙烯(Himont公司,Wilmington,Delaware)制成。
随后,就该涂层织物反抗重力芯吸水的能力做了试验(垂直重力芯吸试验)。试验采用4.5厘米×22.5厘米试样,试样最长尺寸平行于机器(产出)方向。将试样放在刻度试样夹具上并夹住一边悬挂在盛有盐水溶液的器皿上方。降下这一边,直至有2.5厘米的试样位于盐溶液表面以下。启动计时器并观察芯吸流体前沿的位置,在30分钟期间作为时间的函数记录下来。
芯吸试验结果总括在表2中。在该表以及随后的某些表格中,“涂料增重”代表试样表面的涂料量,表示为试样干重的百分率。鉴于所涉及的数量很小,故该涂料增重乃是计算值。将试样称重,以亲水聚合物材料水溶液处理,并再次称重。湿重减去干重得出湿增重。将湿增重乘上处理液中亲水聚合物材料的浓度便得出试样中亲水聚合物材料的量。然后,将该数量除以试样的干重,得到的商乘以100,就得到涂料增重。于是有,
涂料增重=[(100)(湿重-干重)(浓度)]/干重
表2
涂层织物芯吸表现一览
涂层 垂直芯吸高度(厘米)
织物 涂料 增重a 5分钟 15分钟 30分钟
B - - 0.0 0.0 0.0
B B 0.1 9.5 10.5 10.5
B B 0.2 14.0 18.5 21.0
C A 0.2 14.0 20.0 21.0
B A 0.1 9.0 10.0 15.0
B A 0.2 12.5 14.5 15.0
C - - 0.0 0.0 0.0
C B 0.1 12.5 18.0 20.0
C B 0.2 13.0 18.5 20.0
C A 0.1 12.0 18.0 20.0
a表示为试样干重的百分率。
表2中的数据表明,该涂层织物吸水性很好。该数据还表明,可以通过选择适当的涂料、增重(涂布量)以及纤网结构将织物的芯吸性能调节到适合具体应用的需要。
实例3
本实例中所使用的织物是织物D,它是一种2.5osy(约85gsm)的纺粘非织造纤网,其中纤维为并列双组分纤维。2组分含量大致相等,分别由织物B(实例2)所使用的聚乙烯和聚丙烯构成。将织物裁成8英寸(约20厘米)×10英寸(约25厘米)的试样。试样在Branson/IPC型号PM119等离子处理器中,在功率80瓦、0.6毫米汞柱空气等离子压力的条件下进行5分钟氧化。然后,将试样放在由3.97克二水合氯化钙(目录号22,350-6,Aldrich化学公司,密尔沃基,威斯康星)和3,000毫升水组成的溶液中浸泡约30秒钟。溶液含0.1%重量氯化钙。多余的溶液借助真空抽吸从打湿的织物中除去(即让湿织物通过一个抽真空的狭缝)。真空抽吸后,该试样包含大约150%(重量)氯化钙溶液的湿增重(以试样干重为基准)。
将依旧潮湿的试样放在由3.00克或0.1%(重量)高粘度藻酸钠(目录号A-7128,Sigma化学公司,圣路易斯,密苏里)与3,000毫升水组成的溶液中浸泡约30秒钟。借助真空抽吸除去湿样品中的多余溶液。这阶段的试样包含约300%氯化钙和藻酸钠溶液,在试样纤维上生成藻酸钙凝胶(涂料C)。然后,让试样在环境温度(约20°~25℃)下风干过夜。
处理过的试样表现出的垂直芯吸高度,在5分钟和15分钟分别为6.5厘米和9.0厘米,表面张力降低小于2%。表面张力降低的评价方法是,将1英寸×9英寸(约2.5厘米×约23厘米)的涂层织物放在80毫升水中浸泡30分钟。然后,测定该水的表面张力,并与纯水的值进行比较,比较结果用变化百分率表示。
实例4
12英寸×12英寸(约30厘米×约30厘米)的阻挡级聚丙烯熔喷纤网(织物C),在300瓦功率等离子处理器的氧化性等离子中进行一分钟的氧化。然后,将试样在0.3%(重量)二水合氯化钙水溶液中浸泡约30秒钟。让试样通过Atlas实验室用轧水机的二辊隙之间榨去多余溶液。该试样包含200~250%氯化钙溶液的湿增重。
依旧潮湿的试样在0.5%(重量)聚半乳糖醛酸钠(目录号P-1879,Sigma化学公司)水溶液中浸渍约30秒钟。让试样通过Atlas实验室用轧水机的二辊隙之间榨去多余溶液。这阶段的试样包含约200~250%(重量)氯化钙和聚半乳糖醛酸钠的混合溶液,生成聚半乳糖醛酸钙凝胶涂层(涂料D)。然后,让试样在环境温度下风干过夜。
试样干燥后,用盐水溶液对其进行垂直芯吸试验。溶液在5分钟后达到11厘米的高度。
在下面的实例中(实例5~14),就涂层织物的盐水溶液垂直芯吸、表面张力降低以及流出量做了评价。表面张力降低的评价方法同实例3。流出量和垂直芯吸试验则按照前面所述(分别按实例1和2)进行。
实例5
7英寸×10英寸(约18厘米×25厘米)1.5osy(约51gsm)的聚丙烯熔喷纤网(织物C)片材,在射频(RF)等离子发生器(Branson/IPC型号PM119等离子处理器)中,在功率50瓦、0.6毫米汞柱及过氧化氢作用下处理10分钟。过氧化氢蒸汽是通过将盛有30%过氧化氢水溶液(目录号5240,Baxter诊断公司,McGaw,伊利诺依)的小烧杯置于该等离子装置的真空室中产生的。然后,将片材浸泡在维持于70℃的0.2%(重量)琼脂糖水溶液(涂料E,Aldrich化学公司)中,通过Atlas实验室轧水机轧干以达到100%(重量)的湿增重。此时,完全吸饱浴液的纤网,放在环境条件下干燥至恒重。处理过的纤网所显示出的垂直芯吸高度,在5分钟和15分钟时分别为13.5厘米和20.5厘米,表面张力降低为4%。
实例6
用实例2的织物B重复了实例5的程序;织物的单位重量为1.5osy(约51gsm)。处理过的织物所显示出的垂直芯吸高度,在5分钟和15分钟时分别为14.5厘米和18.0厘米,表面张力降低为6%。
实例7
重复实例5的程序,不同的是,织物是浸泡在包含0.2%(重量)90∶10(重量)琼脂(美国生物有机公司)与角叉藻聚糖(Kappa角叉藻聚糖,FMC公司)的混合物(涂料F)中的。该织物充分吸饱了浴液。处理过的织物所显示出的垂直芯吸高度,在5分钟和15分钟时分别为13厘米和19厘米,表面张力降低为4%。
实例8
重复实例5的程序,不同的是,织物是浸泡在包含0.3%(重量)gellan胶水溶液(涂料G,Gelrite,Kelco公司)中的。该织物完全吸饱了浴液。处理过的织物所显示出的垂直芯吸高度,在5分钟和15分钟时分别为7厘米和11.5厘米,表面张力降低为9%。
当用0.2%(重量)角豆胶(locust bean)溶液(涂料H,LBG,Aldrich化学公司)代替gellan胶溶液之后,处理过的织物所显示出的垂直芯吸高度,在60分钟时为2厘米,表面张力降低为0%。尽管该芯吸值并不引人注目,但是该涂层纤网既可润湿,又耐久。因此,角豆胶是亲水性逊于实例中所使用的其他聚合物材料的材料一例。然而角豆胶却提供了一种赋予多孔疏水聚合物基底以适度亲水特征的手段。
采用织物B和织物C以及各种不同涂料和涂布量,重复了以上的程序。按实例3所述方法评价了表面张力降低。结果总括在表3中。
表3
结果一览
涂料 芯吸高度(厘米)
织物
PT a
类型
涂布量 b
5分钟
15分钟
STD c
C Pd Ie 0.1 10.0 16.5 8
C P I 0.5 --- 19.0 5
C P Ef 0.2 13.5 20.5 4
C P Fg 0.2 13.0 19.0 4
B P E 0.2 14.5 18.0 6
B P F 0.2 13.0 19.0 0
C P Gh 0.3 7.0 11.5 9
B P G 0.3 14.5 18.0 10
a预处理
b以试样干重的百分率表示
c表面张力降低百分率
d等离子
e琼脂
f琼脂糖
g琼脂/角叉藻聚糖
hGellan胶。
实例9
用Faustel公司制造的处理器对一卷24英寸宽(约61厘米)的织物连续地进行了表面处理。让织物顺序地通过:Enercon RF电晕处理器(能量输入调节到约20瓦/平方英尺/分钟或约1.3焦耳/平方厘米)、浸渍及轧干涂布辊以及空气穿透干燥炉,最后重新打卷。1.5osy的聚丙烯熔喷纤网(织物C)以15英尺/分钟(约7.6厘米/秒)的速度进行了在线处理,琼脂涂布机中盛有50℃的0.3%(重量)琼脂溶液(涂料I,美国生物有机公司),干燥是在40℃进行的。处理过的纤网所显示出的垂直芯吸高度,在5分钟和15分钟时分别为5.5厘米和8.5厘米,表面张力降低为0。表面张力降低的评价方法如实例3中所述。结果载于表4中。
表4
结果一览
涂料 芯吸高度(厘米)
织物
PT a
类型
涂布量 b
5分钟
15分钟
STD c
B OCd Ie 0.3 8.0 9.5 0
C OC I 0.3 9.0 12.5 0
a预处理
b以试样干重的百分率表示
c表面张力降低百分率
d在线电晕
e琼脂
实例10
7英寸×10英寸(约18厘米×25厘米)0.6osy(约20gsm)聚丙烯纺粘尿布衬里(在Kimberly-Clark公司的Berkeley工厂的工业规模产品)(织物A)在Branson等离子发生器中,在如实例3中所描述的过氧化氢等离子条件下处理5分钟。然后,将片材浸渍在维持于70℃的0.3%琼脂水溶液(涂料I,美国生物有机公司)中,并通过Atlas实验室用轧干机轧干以达到100%的湿增重。被浴液彻底湿透的纤网在环境条件下干燥。处理过的衬里未显示出表面张力的降低。对织物进行了修改的流出量试验(实例1)以考查涂层的耐久性。结果载于实例11后面的表5中。
实例11
重复实例10的程序,不同的是,在等离子处理之后,用实验室用玻璃喷雾器在片材上喷洒了0.3%琼脂热水溶液(涂料I,美国生物有机公司),达到约100%的湿增重。将纤网在环境条件下干燥至恒重。处理过的衬里未显示出表面张力的降低。按实例10所述对处理过的衬里进行测试。测试结果连同实例10的结果一并载于表5(在表中,“浸渍并轧干”指实例10,而“喷雾”则指实例11)。
表5
流出量测试结果一览
流出量(g)
测试编号 浸渍并轧干 喷雾
1 0 0
2 0.3 0.4
3 0 1
4 0 0.7
5 0.1 1
6 0 2.3
7 0.4 2.5
8 0.2 1.2
9 0.6 1.2
10 0.2 2.9
11 0.6 5.1
12 0.8 0.4
13 1.7 1.2
14 0.6 2.1
15 1 0.7
实例12
金属茂聚烯烃发泡片材(OPCELLLC31泡沫体,Sentinel产品公司,Hyannis,麻省)被切成0.25英寸的厚度(约0.6厘米)。泡沫体在等离子发生器(Branson/PC型号PM119)中,在80瓦、0.6毫米汞柱的空气等离子中处理8分钟。然后,让泡沫体吸饱约60℃的0.2%(重量)琼脂溶液(涂料I)。让泡沫体经过抽真空的狭缝将其真空吸干至约250%的湿增重。所有的试样在测试前均进行了风干。滴到泡沫体上的水滴在1分钟内被吸入结构中,相比之下,未经处理的泡沫体,水滴不渗入或根本不散开,甚至经过15分钟之后也不。
还测定了该材料能够保持的流体量。将试样放在水中并加上110克的重量(加重量的目的是为防止试样浮起),维持5分钟。每克泡沫体所容纳的水量载于实例15后面的表6中。如表中所示,处理过的材料能容纳2倍于未处理的泡沫容纳量。
实例13
重复实例12的琼脂(涂料I)试验,不同的是,所使用的泡沫体为不同的金属茂聚烯烃泡沫体(OPCELLLC33泡沫体,Sentinel产品公司)。泡沫体由真空吸干至湿增重约100%。测试前试样经风干。滴到泡沫体上的水滴在0.5分钟内被吸入结构中,相比之下,未经处理的泡沫体,水滴不渗入或不散开,即便15分钟之后也不。按实例12所述测定了泡沫体中所含流体量,结果一并载于实例15后面的表6中。处理的泡沫体比未处理的泡沫体能容纳更多的水。
实例14
重复实例12的程序,不同的是,在等离子处理之后,让泡沫体吸饱0.4%(重量)二水合氯化钙水溶液。用真空将多余溶液从湿泡沫体中吸掉,直至湿重约为干重的150%。然后,将依旧湿的泡沫体浸泡在0.3%(重量)高粘度藻酸钠水溶液中。用真空将多余溶液从湿泡沫体中吸掉,直至总湿重约为干重的300%。此时,在泡沫体中存在着反应产物藻酸钙凝胶(涂料C)。然后,让泡沫体在环境温度下风干过夜。滴加到泡沫体上的水滴在0.5分钟内被吸入结构中,相比之下,未处理的泡沫体,水滴不渗入或散开,即便15分钟之后也不。测定了泡沫体中所含流体量,一并载于实例15后面的表6中。处理的泡沫体可容纳3倍于未处理材料能容纳的水。
实例15
按实例12所述对实例13的泡沫体进行等离子处理。然后让泡沫体吸饱0.4%(重量)二水合氯化钙水溶液。用真空将多余溶液从湿泡沫体中吸掉,直至湿重约为干重的150%。然后,将依旧湿的泡沫体浸泡在0.3%(重量)高粘度藻酸钠水溶液中。用真空将多余溶液从湿泡沫体中吸掉,直至总湿重约为干重的300%。此时,在泡沫体中存在着反应产物藻酸钙凝胶(涂料C)。然后,让泡沫体在环境温度下风干过夜。滴加到泡沫体上的水滴瞬间便被吸入结构中,相比之下,未处理的泡沫体,水滴不渗入或散开,即便15分钟之后也不。测定了泡沫体中所含流体量,一并载于下面的表6中。处理后泡沫体可容纳的水多于未处理材料能够容纳的。
表6
泡沫体处理结果一览
泡沫体 涂料 流体保持
LC31 无 2.57
LC31 Ia 6.20
LC31 Cb 9.04
LC33 无 7.06
LC33 I 11.91
LC33 C 17.30
a琼脂
b藻酸钙
实例16
本实例描述用分段电极电晕放电可在同一非织布上产生可湿性变化的区。
幅宽为14英寸(约36厘米)的1.5osy(约51gsm)聚丙烯熔喷纤网(织物C)被涂布上如实例1中所述的乙基羟乙基纤维素(涂料A)。然后,让涂布的非织布在沿织物长度方向1英寸的区内接受氧化处理;这是通过让涂层织物暴露于电晕放电设备实现的,该设备装备了由多个1英寸的段组成的分段电极(Flexydine System,Corotec公司,Farmington,康奈迪格);这种电极示意地表示在图2中。在图2中,分段电极20,从垂直于机器运行的横向看去,由多个独立的段22组成。位于中央的段22A与接地电极24的距离较近,构成最关键的电晕放电隙26。涂层织物28将分段电极20与接地电极24隔开。
电晕放电是通过以24瓦/平方英尺/分钟(约1.6焦耳/平方厘米)的能量输入使中央电极22A(图2)活化而产生的。该处理产生一个中央区,其可湿性显著高于未暴露于电晕放电的邻近区。由电晕放电造成的这些区示意地表示在图3中。在图3中,非织造纤网30具有中央区32,然后沿织物长度方向延伸,便是两侧区34和36。
通过测定织物反抗重力芯吸流体(即垂直芯吸)的能力并以其作为时间的函数,对织物的可湿性进行了评价。垂直芯吸的结果载于表7中。
表7
分区的涂层聚丙烯非织造纤网的垂直芯吸数据
垂直芯吸高度(厘米)
时间(分钟) 中央区 两侧区
1.5 7.0 4.0
3.0 10.0 5.0
5.0 12.0 7.0
9.0 14.5 7.0
10.0 15.0a 8.0
15.0 - 9.0
a最大高度
如表7所示,中央区(电晕处理后)对流体的芯吸比两侧区更高、更快。
为了测量接触角,用聚丙烯薄膜代替非织造纤网重复了上述程序。之所以优选在薄膜上测量接触角是由于,这样可更可靠地就这些涂层所固有的可湿性进行比较,就是说,在薄膜中,非织造布情况所存在的那种毛细管效应将不复存在。接触角是采用无座水滴法(例如参见“接触角与界面能量学”,J.D.Andrade,L.M.Smith及D.E.Gregonis,《生物医学聚合物的表面与界面问题》,第一卷,J.D.Andrade主编,1985,Plenum出版社,纽约),结果载于表8中。将既未涂布也未经电晕放电处理的素薄膜作为对比试样。
表8
乙基羟乙基纤维素涂层的聚丙烯薄膜的水接触角
材料 接触角(°)
对比试样 97
仅涂布(两侧区) 30
涂布并电晕
处理(中央区) 0
表8显示,涂布乙基羟乙基纤维素,以及将此种涂布与电晕后处理相结合所获得的可湿性改善。该表还显示出对涂层薄膜进行电晕后处理的优点。
另外,又通过X射线光电子图谱术(XPS)对非织布表面的分析映证电晕后氧化的效果。以氧/碳比(O/C)表示的XPS分析结果载于表9中。
表9
乙基羟乙基纤维素涂层聚丙烯非织造纤网的XPS数据
材料
O/C原子百分比
对比试样 0.01
仅涂布(两侧区) 0.55
涂布并电晕处理
(中央区) 0.75
上表显示,经过电晕放电处理的中央区的O/C比,与未经过电晕放电处理的两侧区相比,有了提高。接触角、垂直芯吸及XPS数据之间关联得很好,清楚地表明,该表面按XPS测定衡量的氧化程度提高了,接触角降低了,同时垂直芯吸速率加快了。最重要的是,关系到流体输运(即垂直芯吸)的可湿性行为可被控制在同一非织布的特定区域内。
实例17
重复实例16的程序,不同的是,以射频辉光放电(RFGD)代替电晕放电。就典型情况而言,将涂层织物置于两个可移动铝套筒之间,以便使约1英寸(约2.5厘米)宽的一段狭窄区域暴露于如下条件的RFGD之下:
功率=50瓦
压力=0.5毫米汞柱
气体=空气
暴露时间=5分钟
垂直芯吸结果载于表10中。
表10
乙基羟乙基纤维素涂层聚丙烯非织造纤网,
经过或未经RFGD后处理的垂直芯吸高度
垂直芯吸高度(厘米)
时间(分钟) 中央区 两侧区
1.5 6.0 3.5
3.0 8.5 4.5
5.0 12.0 7.0
10.0 15.0a 9.0
15.0 - 11.5
a最大高度。
在比较了表10的数据与表7的数据之后可明显看出,RFGD后处理的效果与电晕放电后处理的效果大致相当。
实例18
将织物C的试样(1.5osy或51gsm聚丙烯熔喷纤网,如实例2所述)层合到织物B试样(皮芯双组分纤维组成的纺粘纤网,同样如实例2所述)上。这两种织物的涂层如实例1所述。趁仍旧饱含涂布溶液的时候将二织物叠合在一起,并让层合的片材在辊隙压力10磅(约4.5千克)的条件下通过实验室用轧干机,以去除多余涂布溶液。将如此获得的层合物放在烘箱中干燥至不再观察到重量损失,典型地在60℃下需要30分钟。然后测定该层合物的垂直芯吸,并将其表现与构成该层合物的各涂布织物进行比较。结果载于表11。
表11
每一种非织造纤网,以及两种纤网的层合物
(均涂布了乙基羟乙基纤维素)的垂直芯吸数据
垂直芯吸高度(厘米)
时间(分钟) 层合物 织物B 织物C
1.0 5.0 1.0 3.5
2.0 8.0 2.5 4.0
4.0 15.0 4.0 6.0
由织物B与C的层合物所提供的芯吸性能显著优于各单独的织物。进而,该层合物的表现证明,两种织物的结合意外地产生一种协同效应。
虽然,上面已就本发明的具体实施方案详细说明了本发明的规格,然而要知道,本领域技术人员在理解了上述内容之后将很容易想到这些实施方案的各种变换方案及等价方案。
Claims (25)
1.一种涂层多孔基底,它包含:
基本均匀地涂布了占基底干重0.1-1.25%的亲水聚合物材料的多孔疏水聚合物基底;其中:
该亲水聚合物材料涂层可耐受温度约10℃~约50℃的含水介质;而且
该亲水聚合物材料涂层将不会显著降低涂层多孔基底可能接触到的含水介质的表面张力。
2.权利要求1的涂层多孔基底,其中多孔疏水聚合物基底是多孔片状材料。
3.权利要求2的涂层多孔基底,其中多孔片状材料选自泡沫体、纤维及纤网。
4.权利要求3的涂层多孔基底,其中多孔片状材料是聚烯烃纤维构成的纤网。
5.权利要求1的涂层多孔基底,其中亲水聚合物材料是交联的。
6.权利要求1的涂层多孔基底,其中亲水聚合物材料是聚糖。
7.权利要求1的涂层多孔基底,其中亲水聚合物材料是改性聚糖。
8.权利要求7的涂层多孔基底,其中改性聚糖是改性纤维素。
9.权利要求1的涂层多孔基底,其中亲水聚合物材料涂层的亲水性按控制的方式沿其至少一个尺寸方向变化。
10.一种层合物,特征在于包含至少两层权利要求4的涂层纤网。
11.权利要求10的层合物,其中各层独立地选自熔喷纤网和纺粘纤网。
12.一种用即弃吸收制品,其特征在于包括前述权利要求2、4-7和9之一的涂层多孔基底作为其一种组成部分。
13.一种制备涂层多孔基底的方法,它包括:
提供由疏水聚合物构成的多孔基底;
让该多孔基底的至少一部分暴露在活性组分的场中;以及
将多孔基底的至少一部分,包括在活性组分场中暴露过的那部分,置于足以使多孔基底基本均匀地涂布上亲水聚合物材料的条件下接受包含水和亲水聚合物材料的混合物处理;
其中,
该亲水聚合物材料涂层可耐受温度约10℃~约50℃的含水介质;而且
该亲水聚合物材料涂层将不会显著降低涂层多孔基底可能接触到的含水介质的表面张力。
14.权利要求13的方法,其中多孔基底是多孔片状材料。
15.权利要求14的方法,其中多孔片状材料选自泡沫体、纤维及纤网。
16.权利要求15的方法,其中多孔片状材料是聚烯烃纤维构成的纤网。
17.权利要求13的方法,它还包括,在以包含水和亲水聚合物材料的混合物处理过多孔基底的至少一部分之后,使亲水聚合物材料交联。
18.权利要求13的方法,其中亲水聚合物材料是聚糖。
19.权利要求13的方法,其中亲水聚合物材料是改性聚糖。
20.权利要求19的方法,其中改性聚糖是改性纤维素。
21.权利要求13的方法,其中活性组分的场选自电晕放电场及等离子场。
22.权利要求21的方法,其中活性组分的场强按控制的方式沿纤网的至少一个尺寸方向变化。
23.权利要求13的方法,它还包括,在以包含水和亲水聚合物材料的混合物处理过多孔基底的至少一部分之后,让多孔基底的一部分暴露于活性组分的场之中。
24.权利要求23的方法,其中活性组分的场选自电晕放电场及等离子场。
25.权利要求23的方法,其中活性组分的场强按控制的方式沿纤网的至少一个尺寸方向变化。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/665,172 US5814567A (en) | 1996-06-14 | 1996-06-14 | Durable hydrophilic coating for a porous hydrophobic substrate |
US08/665,172 | 1996-06-14 |
Publications (2)
Publication Number | Publication Date |
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CN1222207A CN1222207A (zh) | 1999-07-07 |
CN1153867C true CN1153867C (zh) | 2004-06-16 |
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ID=24669021
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Application Number | Title | Priority Date | Filing Date |
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CNB971954879A Expired - Fee Related CN1153867C (zh) | 1996-06-14 | 1997-06-10 | 用于多孔疏水聚合物基底上的耐久亲水涂料 |
Country Status (10)
Country | Link |
---|---|
US (2) | US5814567A (zh) |
EP (1) | EP0904446A1 (zh) |
CN (1) | CN1153867C (zh) |
AR (1) | AR007589A1 (zh) |
AU (1) | AU725443B2 (zh) |
BR (1) | BR9709723A (zh) |
CA (1) | CA2256388A1 (zh) |
CO (1) | CO4850633A1 (zh) |
WO (1) | WO1997047801A1 (zh) |
ZA (1) | ZA975066B (zh) |
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-
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- 1997-06-10 EP EP97928861A patent/EP0904446A1/en not_active Withdrawn
- 1997-06-10 BR BR9709723A patent/BR9709723A/pt not_active IP Right Cessation
- 1997-06-10 CN CNB971954879A patent/CN1153867C/zh not_active Expired - Fee Related
- 1997-06-10 AU AU33022/97A patent/AU725443B2/en not_active Expired
- 1997-06-10 CA CA002256388A patent/CA2256388A1/en not_active Abandoned
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1998
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BR9709723A (pt) | 1999-08-10 |
AR007589A1 (es) | 1999-11-10 |
WO1997047801A1 (en) | 1997-12-18 |
CA2256388A1 (en) | 1997-12-18 |
US5814567A (en) | 1998-09-29 |
AU3302297A (en) | 1998-01-07 |
US5945175A (en) | 1999-08-31 |
ZA975066B (en) | 1998-01-14 |
AU725443B2 (en) | 2000-10-12 |
CO4850633A1 (es) | 1999-10-26 |
EP0904446A1 (en) | 1999-03-31 |
CN1222207A (zh) | 1999-07-07 |
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