CN101175630A - 横向的、弹性体的透气膜 - Google Patents
横向的、弹性体的透气膜 Download PDFInfo
- Publication number
- CN101175630A CN101175630A CNA2006800036524A CN200680003652A CN101175630A CN 101175630 A CN101175630 A CN 101175630A CN A2006800036524 A CNA2006800036524 A CN A2006800036524A CN 200680003652 A CN200680003652 A CN 200680003652A CN 101175630 A CN101175630 A CN 101175630A
- Authority
- CN
- China
- Prior art keywords
- sandwich layer
- plural layers
- additive
- layers
- calcium carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
本发明提供多层薄膜,其优选包括两表皮层、两外芯层和内芯层,所述两表皮层每层优选包含低密度聚乙烯,所述两外芯层优选包含添加剂和苯乙烯嵌段共聚物,所述内芯层优选包括添加剂和苯乙烯嵌段共聚物。
Description
技术领域
本发明主要涉及合成薄膜,更具体地,涉及具有微孔的透气结构的横向弹性体膜。本发明的薄膜优选具有通常为如下布置的五层结构:表皮/外芯/内芯/外芯/表皮。
背景技术
塑料薄膜用于各种应用。这种薄膜从单层聚合物到具有各种关系的层并且其中包含共聚物的多层结构。多层的使用可以定制改造薄膜,以满足一定的性能要求,如从阻挡性能要求到强度性能要求。
这种薄膜的一种应用是,在尿布、吸水垫(absorbent pad)等中作为阻挡层。在使用中,含有所述薄膜的产品会与人的皮肤接触很长一段时间,如例如在尿布的应用中,经如此接触的人的皮肤可能生长出皮疹或者产生其它的刺激。传统的薄膜并不能充分解决此问题。因此需要一种适合提供用于尿布等薄膜所想要的物理性能的多层薄膜,同时为了减少或者消除皮疹和其它的刺激要使其透气。
发明内容
在本发明的一个实施方式中,本发明的多层薄膜包括含有至少一种聚烯烃聚合物的第一层。还设有第二层,它包括至少一种聚合物配混料(polymercompound),所述聚合物配混料可以是聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟聚合物、聚氯乙烯、或任何其它合适的聚合物或者它们的混合物。
在本发明的一个可选择的实施方式中,多层薄膜的第二层包括茂金属催化的聚合物。在本发明的另一实施方式中,第二层进一步包括添加剂如碳酸钙或其它合适的添加剂。
在优选的实施方式中,本发明的薄膜有五层,包括优选含有低密度聚乙烯的两层表皮层、优选含有添加剂和苯乙烯嵌段共聚物的两层外芯层、以及优选含有添加剂和苯乙烯嵌段共聚物的内芯层。
在本发明优选的实施方式中,表皮层进一步包括至少一种添加剂如抗氧化剂或者防粘连剂。此外,外芯层优选包括茂金属催化的聚合物,如茂金属催化的线性低密度聚乙烯。在内芯层和外芯层的添加剂优选是碳酸钙。
附图说明
图1是依据本发明的教导所构建的五层薄膜的截面图。
具体实施方式
本发明的多层薄膜具有以下结构:该结构包括至少一种聚烯烃聚合物的至少一层第一层;以及至少一种混配料的至少一层第二层,所述混配料选自茂金属催化的聚烯烃聚合物、乙烯共聚物树脂、苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚物以及它们的混合物。所述薄膜的总厚度可以变化,这依赖于该薄膜的预期应用。优选的薄膜具有大约1.25密耳~大约1.5密耳,更优选大约1.34密耳(大约30g/cm2)的厚度。各层的厚度优选为大约0.025密耳~大约0.75密耳,更优选大约为0.60密耳。
现在请参见图1,本发明的优选实施方式具有如下构造的五层:表皮层/外芯/内芯/外芯/表皮层。在该图中,表皮层由字母“B”表示,外芯层由字母“A”表示,内芯层由字母“C”表示。在所述的本发明实施方式中,优选每层表皮层构成全部膜重量的大约1%~2%,或者优选构成全部膜重量的大约1%~1.5%,或者更优选构成全部膜重量的大约1%。在该实施方式中,还优选每层外芯层构成全部膜重量的大约18%~24%,或者优选构成全部膜重量的大约20%~24%,或者更优选构成全部膜重量的大约24%。最后,在该实施方式中,优选内芯构成全部膜重量的大约48%-60%,或者优选构成全部膜重量的大约48%-54%,或者更优选构成全部膜重量的大约48%。但是,本领域的技术人员将可以接受的是,每单层的厚度可以不同于上述给定的优选厚度。
通过在生产多层薄膜中所使用的传统方法,包括共挤出法和挤出层合技术,可以生产本发明的多层薄膜。例如,所述薄膜可以通过共挤出法来形成。使用该方法,各层材料的熔融的、塑化流(plasticized stream)被送进共挤塑模头。当在模头中时,并置和结合各层,此后,它们以聚合材料的单一多层薄膜的形式由模头中挤出。合适的共挤出技术被详细地描述在美国专利Nos.5,139,878和4,677,017中,此处在法律允许的程度上将其引入作为参考。本发明薄膜的共挤出可以在大约400°F~大约510°F的温度下进行。共挤出技术包括使用带有标准模头、多支管模头如圆形模头以及诸如在形成平流延薄膜和流延片材中所使用的多支管模头的进料头。本发明的多层薄膜还可以通过吹塑薄膜共挤出法来制造。用由具有同心圆注孔的多支管圆形模头构成的吹塑薄膜装置,来形成所述薄膜。通过经圆形模头共挤出熔融层以及经与第一圆形模头同心的另外圆形模头共挤出熔融层在第一层的其它侧或者相对侧上,来形成所述多层薄膜。接着,经过与圆形模头同心的喷射器将气体,典型为空气吹出,由此形成膨胀各层的气泡。气泡自身破裂,形成在两相对边缘上粘连的一对多层薄膜。通常,该对粘连的多层薄膜然后在其一边缘或者多边缘上切开,分离成可以卷起的一对多层薄膜。优选本发明的薄膜用平流延方法(flat castprocess)齿轮传动。以下提供优选方法的实施例。
实施例1-生产本发明薄膜的方法
现在描述用于生产本发明薄膜的优选方法。第一步,在失重搅拌器中混合各组分,并以所希望的比例(以下相应于具体的薄膜,更详细地描述)来混合,然后送至挤出机的进料部分。该方法允许干式混合各组分,由此避免需要使用更昂贵的、完全混合式的混合。专用的挤出机混合、熔融和计量具体薄膜层的各组分。进料头和导流板(flow plate)将三股熔融流导入五层构造中。三股熔融流是A)外芯、B)表皮和C)内芯。熔融流的五层构造如下:B-A-C-A-B。平的单缝模头将薄膜挤压出在光滑的冷铸辊上,生产出平的薄膜产品。接着,一系列的预热、拉伸和退火辊提供给该薄膜以足够的纵向取向,以在该结构中形成微孔。这些孔允许水汽传送,但是它们太小不允许液体通过。纵向取向的方法还导致横向拉长所需要的力最小化。选择弹性体型材料有助于确保足够的伸展和复原,以及符合所述的物理性能要求。为了在随后使薄膜收缩最小化,在后续操作之后进行纵向松弛。在卷起之前,允许薄膜收缩10%-25%。
在优选的薄膜中,外表皮层每层构成总薄膜重量的大约1%-2%,并且优选包括至少一种聚烯烃聚合物。优选的聚烯烃聚合物包括聚乙烯、聚丙烯、聚丁烯、聚异戊二烯、它们的共聚物、它们的三元共聚物、α-烯烃丙烯共聚物以及它们的混合物。可以使用任何其它合适的聚烯烃聚合物。合适的聚乙烯包括,特别是低密度聚乙烯(LDPE)、线型低密度聚乙烯(LLDPE)、以及超低密度聚乙烯(ULDPE)。特别优选的是“光脚(barefoot)”级LDPE。优选的丙烯聚合物通常具有180℃或更高的熔点。优选的丙烯聚合物通常进一步具有在230℃和大约21.6N的力时大约0.5g/10分钟到大约10g/10分钟的熔体流动指数。具有大约1-15wt.%正庚烷可溶物的全同立构丙烯均聚物;丙烯与具有10wt.%或者更少的α-烯烃含量的C4-C8α-烯烃共聚物;丙烯含量为10wt%或者更少且丁烯含量为15wt%或者更少的丙烯、乙烯与丁烯的三元共聚物,这些是优选的丙烯聚合物。还有合适的是丙烯均聚物、共聚物、三元聚合物与其它聚烯烃的混合物。在其它功能中,表皮层用作防止模头堵塞,且最小化或防止薄膜粘连或粘住。表皮层可以进一步包括添加剂如抗氧化剂或防粘连剂。
在优选的薄膜中,外芯层每层构成整个薄膜重量的大约18%-24%,优选大约24%。每层外芯层优选包括大约67wt.%的中和剂如CaCO3(优选以碳酸钙超浓缩物的形式提供,描述如下)、大约26wt.%的苯乙烯-乙烯/丁烯-苯乙烯(SEBS)聚合物例如由Kraton聚合物公司(Kraton Polymers,Houston,Texas)得到的Kraton 1657、以及大约7wt%的茂金属催化的聚烯烃聚合物,例如由Dow化学公司(Dow Chemical Company,Midland,Michigan)得到的乙烯α-烯烃树脂Dow PL 1280。其它合适的弹性体可以用于代替上述的SEBS聚合物,如Kraton 6571和Kraton 6936。同样地,其它合适的茂金属催化聚合物可以用于代替上述的茂金属催化的聚烯烃聚合物。在其它功能中,外芯层用作提供透气性、某些弹性体性能、耐用性(与茂金属聚合物)以及抗粘连特性。
在优选的薄膜中,内芯层构成薄膜重量的大约48%-60%。内芯层优选包括大约67wt.%的中和剂如CaCO3(优选以碳酸钙超浓缩物的形式提供,描述如下)、大约33wt.%的高SEBS嵌段共聚物如例如Kraton G1657。也可以使用其它合适的配混料如苯乙烯-乙烯/丁烯-苯乙烯热塑性弹性体、或者高性能热塑性橡胶。在其它功能中,内芯层用于提供透气性和弹性性能给所述薄膜。
在本发明的内芯层和外芯层中的碳酸钙添加剂可以以任何合适的方法提供,但是优选以碳酸钙超浓缩物的形式提供。该超浓缩物优选含有大约75%的硬脂酸涂层的Omya 2SST碳酸钙、大约0.18%的B-900抗氧化剂(由CibaSpecialty Chemicals,Tarrytown,NY得到)、大约12.41%的Dowlex 2517LLDPE以及大约12.41%的Dowlex 2035LLDPE。
本领域的技术人员将可以接受的是,为了改进特定层的某些性能,可以将添加剂加入到本发明薄膜的一层或者多层中。优选的添加剂包括色母料、中和剂、操作助剂、润滑剂、稳定剂、烃类树脂、抗静电剂和防粘连剂。可以加入色母料,产生有色层、不透明层或半透明层。优选的色母料包括颜色配方(colorformulation),其包括黑色、白色和适合于本发明薄膜的其它颜色。优选的色母料包括白色PE母料,它可以由Ampacet Corporation(塔利顿,纽约州)得到。白色PE母料的载体树脂是具有20g/10分钟的熔体指数和0.92g/cc的密度的LLDPE。该母料具有2.06的标称(nominal)比重、3-23g/10分钟的熔体指数,并且标称上含有75%的灰份。另外优选的色母料包括白色HDPE母料,其载体树脂是具有10g/10分钟的标称熔体指数和0.96g/cc的密度的HD/LLDPE。该母料具有L54的标称比重、9-15g/10分钟的熔体指数、以及包含50%TiO2的颜料。
合适的中和剂包含如上所述的碳酸钙和硬脂酸钙。优选的中和剂具有小于10p,m的绝对粒径和至少40m2/g的比表面积。聚合加工助剂还可以用于层中。含氟聚合物、含氟聚合物混合物以及含氟弹性体是特别优选的,但是用于聚合物薄膜的、本领域已知的任何加工助剂是合适的。特别优选的加工助剂是加工助剂PE母料,其为具有2g/10分钟的标称熔体指数和0.918g/cc的密度的LLDPE载体树脂。此处母料具有0.91的标称比重、1-3g/10分钟的标称熔体指数,并且含有3%的灰份。
依据本发明可以使用的润滑剂包括高级脂肪酸酯、高级脂肪族酰胺、金属皂、聚二甲基硅氧烷以及蜡。用于乙烯、丙烯以及其它α-烯烃的聚合物的传统稳定化合物优选应用于本发明。具体地,碱金属碳酸盐、碱土金属碳酸盐、酚型稳定剂、碱金属硬脂酸盐以及碱土金属硬脂酸盐优选用作本发明组合物的稳定剂。
为了改进薄膜的所想要的物理性能,已经发现烃类树脂,特别是苯乙烯类树脂、萜烯树脂、石油树脂以及环戊二烯树脂适合用作添加剂。这些性能可以包括水汽渗透性、收缩率、薄膜硬度以及光学性能。特别是,粘合用树脂是优选的。特别优选的粘合用树脂是在商标下由杜邦集团(DuPontCorporation)出售的,其主要由带一些残余马来酸酐的马来酸酐改性聚烯烃组成,还可以包含少量的稳定剂、添加剂和颜料。
优选的抗静电剂包括基本上直链和饱和的脂肪族叔胺,其含有具有10-20个碳原子的、被o-羟基-(C1-C4)-烷基取代的脂肪族残基,和在烷基中具有10-20个碳原子的N,N-二(2-羟乙基)烷基胺。其它合适的抗静电剂包括乙氧基化或丙氧基化的聚二有机硅氧烷如聚二烷基硅氧烷和聚烷基苯基硅氧烷以及碱金属链烷磺酸盐。
优选的防粘连剂包括有机聚合物如聚酰胺、聚碳酸酯和聚酯。其它优选的防粘连剂包括碳酸钙、硅酸铝、硅酸镁、磷酸钙、二氧化硅和硅藻土。
在上文所述的本发明薄膜的优选实施方式中,薄膜结构是五层结构。五层构造允许最高含量的弹性体填埋在内芯层。这允许其它组分作为保护性外芯层,通过使外芯中的粘性弹性体的含量最小化,从而使薄膜粘住或粘连最小化,或者防止薄膜粘连或结块;为了封装内芯层并且提供膜强度,还允许在外芯层中使用茂金属催化的聚烯烃聚合物。最后,五层构造允许使用薄的、保护性LDPE外表皮,在薄膜流延加工期间提供防止模头堵塞。由于这些优点,上述的本发明薄膜的五层实施方式是优选的。但是,本领域技术人员将可以接受的是,在阅读本发明公开内容时,也可以使用其他数量的层。
本发明通过如下实施例来进一步解释,这些实施例不以任何方式构成对本发明范围的强加限制。相反,将清楚地了解到:在不偏离本发明的精神和/或所附权利要求的范围下,可以使用本领域技术人员在阅读此处描述以后自身所启示的各种其它实施方式、修改和等同物。
依据本发明的薄膜结构的实施例
用表1中所述的配方,生产具有总厚度为约1.5密耳的五层薄膜。
层 | 占薄膜的(w)百分比 | 聚合物 | 添加剂 | 茂金属 |
1(表皮) | 1% | LDPE | 0 | 0 |
2(外芯) | 18% | 23%SEBS | 67%CaCO3 | 7%乙烯α-烯烃树脂 |
3(内芯) | 62% | 33%SEBS | 67%CaCO3 | 7%乙烯α-烯烃树脂 |
4(外芯) | 18% | 23%SEBS | 67%CaCO3 | 7%乙烯α-烯烃树脂 |
5(表皮) | 1% | LDPE | 0 | 0 |
表1.配方A-5层配方
用于生产表1薄膜的具体产品提供在以下表2中。
层 | 占薄膜的(w)百分比 | 聚合物 | 添加剂 | 茂金属 |
1(表皮) | 1% | LDPE | 0 | 0 |
2(外芯) | 18% | 23%Kraton 1657 | 67%CaCO3 | 7%Dow PL 1280 |
3(内芯) | 62% | 33%Kraton G1657 | 67%CaCO3 | 0 |
4(外芯) | 18% | 23%Kraton G1657 | 67%CaCO3 | 7%Dow PL 1280 |
5(表皮) | 1% | LDPE | 0 | 0 |
表2.配方B-5层配方
表1和2中所述的薄膜通过如下方法来生产。该薄膜通过共挤出法来生产,用存在于表皮层挤出机中的LDPE,使得1%的LDPE表皮层被制备在所述薄膜的任一侧上。在大约50米/分钟(大约150英尺/分钟)的冷却辊速度下开始流延,冷却辊速度逐渐增加至最高大约75米/分钟(225英尺/分钟)。计算未伸长薄膜的厚度大约为3.4密耳。,将MDO温度调整为:在预加热区130°F,在伸展区125-130°F,在MDO中的最后两辊区170-175°F,以便使薄膜退火。使用大约3.85X到大约4X的拉伸比例,观察薄膜伸展性并检验薄膜性能。在MDO中薄膜收缩大约18%。
用表3中所述的配方,生产具有总薄膜厚度为约1.50密耳的五层膜。
层 | 占薄膜的(w)百分比 | 聚合物 | 添加剂 | 茂金属 |
1(表皮) | 1% | LDPE | 0 | 0 |
2(外芯) | 18% | 23%Kraton 1657 | 67%CaCO3 | 7%DowPL1280 |
3(内芯) | 62% | 33%Kraton混合物(20%1657+80%其它SEBS热塑性弹性体 | 67%CaCO3 | 0 |
4(外芯) | 18% | 23%Kraton 1657 | 67%CaCO3 | 7%DowPL1280 |
5(表皮) | 1% | LDPE | 0 | 0 |
表3.配方C-5层配方
用表3中所述的配方,生产具有总薄膜厚度为约1.50密耳的五层膜。
层 | 占薄膜的(w)百分 | 聚合物 | 添加剂 | 茂金属 |
1(表皮) | 1% | LDPE | 0 | 0 |
2(外芯) | 18% | 23%Kraton 1657 | 67%CaCO3 | 7%DowPL1280 |
3(内芯) | 62% | 23%Kraton混合物(40%1657+60%其它SEBS热塑性弹性体 | 67%CaCO3 | 0 |
4(外芯) | 18% | 23%Kraton1657 | 67%CaCO3 | 7%DowPL1280 |
5(表皮) | 1% | LDPE | 0 | 0 |
表4.配方D-5层配方
测试所述薄膜的弹性性能和透气性。对于弹性,使用二次循环测试(twocycle test)来测定负载损耗和永久变形率。二次循环测试实现最高达70%的伸长。样品尺寸为纵向3英寸,横向6英寸。夹头尺寸(grip size)为3英寸宽。夹头间隔为4英寸。装载该样品,使得该样品的横向是在垂直方向上。预负载设定为大约10-15g。在测试期间,该薄膜以20英寸/分钟(500mm/分钟)的速率拉伸至70%的伸长率(4英寸的间隙另加2.8英寸),然后立即返回到零点(4英寸测量间隔)。术语“永久变形率”表示在循环之后材料从其原始长度伸长的测试量。永久变形率被定义为收缩曲线跨过伸长轴的点。该“负载损耗”值计算如下:
其中,两个循环的伸长张力为均在50%的伸长率时测定的。
为了解释和描述的目的,已经给出了本发明实施方式的以上描述,所述以上描述不意指穷尽叙述,或者将本发明限制在所公开的确切形式。为了最好地解释本发明的原理和这些原理的实际应用而选择了该描述内容,以便能够使本领域其它技术人员以各种实施方式最好地使用本发明,和诸如适于特定预期应用的修改。本发明的范围不打算被说明书所限制,而是由以下所述的权利要求来定义。
Claims (51)
1.多层薄膜,包括:包含至少一种聚烯烃聚合物的第一层;以及
包含添加剂和至少一种聚合物配混料的第二层,所述聚合物配混料选自高性能热塑性橡胶、聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟聚合物、聚氯乙烯以及它们的混合物组成的组。
2.如权利要求1的薄膜,其中,所述第二层的所述聚合物配混料包括茂金属催化的聚合物。
3.如权利要求1的薄膜,其中,所述添加剂是中和剂。
4.如权利要求3的薄膜,其中,所述添加剂是碳酸钙。
5.多层薄膜,包括:包含至少一种聚烯烃聚合物的第一表皮层;
包含添加剂和至少一种聚合物配混料的芯层,所述聚合物配混料选自高性能热塑性橡胶、聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟聚合物、聚氯乙烯以及它们的混合物组成的组;以及
包含至少一种聚烯烃聚合物的第二表皮层;
其中,所述芯层位于所述第一表皮层与所述第二表皮层之间。
6.如权利要求5的薄膜,其中,所述添加剂是中和剂。
7.如权利要求6的薄膜,其中,所述添加剂是碳酸钙。
8.如权利要求4的薄膜,其中,所述芯层包括:
包含添加剂和至少一种聚合物配混料的第一外芯层,所述聚合物配混料选自聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟共聚物、聚氯乙烯以及它们的混合物组成的组,其中,所述至少一种聚合物配混料是茂金属催化的聚合物,
包含添加剂和至少一种聚合物配混料的内芯层,所述聚合物配混料选自高性能热塑性橡胶、聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟聚合物、聚氯乙烯以及它们的混合物组成的组;以及
包含添加剂和至少一种聚合物配混料的第二外芯层,所述聚合物配混料选自聚烯烃聚合物、乙烯共聚物树脂、苯乙烯嵌段共聚物、含氟聚合物、聚氯乙烯以及它们的混合物组成的组,其中,所述至少一种聚合物配混料是茂金属催化的聚合物,
其中,所述内芯层位于所述第一外芯层与所述第二外芯层之间。
9.如权利要求8的薄膜,其中,包含于所述内芯层与第一和第二外芯层的添加剂是中和剂。
10.如权利要求9的薄膜,其中,包含于所述内芯层与第一和第二外芯层的添加剂是碳酸钙。
11.多层薄膜,包括:包含至少一种聚烯烃聚合物的第一表皮层;
包含添加剂以及进一步包含苯乙烯嵌段共聚物的第一外芯层;
包含添加剂以及进一步包含苯乙烯嵌段共聚物的内芯层;
包含添加剂以及进一步包含苯乙烯嵌段共聚物的第二外芯层;以及
包含至少一种聚烯烃聚合物的第二表皮层,
其中,所述内芯层位于所述第一和第二外芯层之间,其中,所述第一和第二外芯层位于所述第一和第二表皮层之间。
12.如权利要求11的多层薄膜,其中,在所述第一和第二表皮层中的所述至少一种聚烯烃聚合物包括低密度聚乙烯。
13.如权利要求12的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
14.如权利要去13的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
15.如权利要求11的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
16.如权利要求12的多层薄膜,其中,所述第一和第二外芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
17.如权利要求16的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
18.如权利要求17的多层薄膜,其中,在所述内芯层与第一和第二外芯层中的添加剂包括碳酸钙。
19.如权利要求16的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
20.如权利要求16的多层薄膜,其中,所述内芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
21.如权利要求20的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
22.如权利要求21的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
23.如权利要求20的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
24.如权利要求11的多层薄膜,其中,所述第一和第二外芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
25.如权利要求24的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
26.如权利要求25的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
27.如权利要求24的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
28.如权利要求24的多层薄膜,其中,所述内芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
29.如权利要求28的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
30.如权利要求29的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
31.如权利要求28的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
32.如权利要求11的多层薄膜,其中,所述内芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
33.如权利要求32的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
34.如权利要求33的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
35.如权利要求32的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
36.如权利要求12的多层薄膜,其中,所述内芯层的苯乙烯嵌段共聚物包括苯乙烯-乙烯/丁烯-苯乙烯弹性体。
37.如权利要求36的多层薄膜,其中,所述第一和第二外芯层进一步包括茂金属催化的聚烯烃聚合物。
38.如权利要求37的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
39.如权利要求36的多层薄膜,其中,在所述内芯层与所述第一和第二外芯层中的添加剂包括碳酸钙。
40.如权利要求11的多层薄膜,其中,所述第一和第二表皮层构成所述薄膜重量的大约2%-大约4%。
41.如权利要求11的多层薄膜,其中,所述内芯层和外芯层构成所述薄膜重量的大约36%-大约45%。
42.如权利要求11的多层薄膜,其中,所述内芯层构成所述薄膜重量的大约48%-大约60%。
43.如权利要求20的多层薄膜,其中,所述第一和第二表皮层构成所述薄膜重量的大约2%-大约4%。
44.如权利要求20的多层薄膜,其中,所述内芯层和外芯层构成所述薄膜重量的大约36%-大约45%。
45.如权利要求20的多层薄膜,其中,所述内芯层构成所述薄膜重量的大约48%-大约60%。
46.如权利要求11的多层薄膜,其中,在所述第一和第二外芯层以及所述内芯层中的添加剂包括碳酸钙。
47.如权利要求11的多层薄膜,其中,所述第一和第二表皮层进一步包括选自抗氧化剂和防粘连剂组成的组中的至少一种添加剂。
48.如权利要求20的多层薄膜,其中,所述第一和第二表皮层进一步包括选自抗氧化剂和防粘连剂组成的组中的至少一种添加剂。
49.多层薄膜,包括:包含低密度聚乙烯的第一表皮层;
包含碳酸钙、苯乙烯-乙烯/丁烯-苯乙烯弹性体以及茂金属催化的线型低密度聚乙烯的第一外芯层;
包含碳酸钙和苯乙烯-乙烯/丁烯-苯乙烯弹性体的内芯层;
包含碳酸钙、苯乙烯-乙烯/丁烯-苯乙烯弹性体以及茂金属催化的线型低密度聚乙烯的第二外芯层;以及
包含低密度聚乙烯的第二表皮层,
其中,所述内芯层位于所述第一和第二外芯层之间,其中,所述第一和第二外芯层位于所述第一和第二表皮层之间。
50.如权利要求49的多层薄膜,其中,所述第一和第二表皮层进一步包括选自抗氧化剂和防粘连剂组成的组中的至少一种添加剂。
51.如权利要求49的多层薄膜,其中,所述第一和第二表皮层每层构成所述薄膜重量的大约1%-大约2%,所述第一和第二外芯层每层构成所述薄膜重量的大约18%-大约24%,所述内芯层构成所述薄膜重量的大约48%-大约60%。
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US6682803B2 (en) * | 1999-08-27 | 2004-01-27 | Kimberly-Clark Worldwide, Inc. | Breathable multilayer films with breakable skin layers |
JP2003515619A (ja) * | 1999-11-01 | 2003-05-07 | キンバリー クラーク ワールドワイド インコーポレイテッド | スチレン系ブロックコポリマーの通気性エラストマーフィルム |
US6794024B1 (en) * | 1999-11-01 | 2004-09-21 | Kimberly-Clark Worldwide, Inc. | Styrenic block copolymer breathable elastomeric films |
FR2802849B1 (fr) * | 1999-12-28 | 2002-03-01 | Trioplanex France | Film multicouche microporeux et procede de production |
JP2001294698A (ja) * | 2000-04-13 | 2001-10-23 | Sekisui Chem Co Ltd | 微多孔フィルム及び積層体 |
US6821915B2 (en) * | 2000-05-03 | 2004-11-23 | Kimberly-Clark Worldwide, Inc. | Film having high breathability induced by low cross-directional stretch |
US6702800B1 (en) * | 2000-10-27 | 2004-03-09 | Kimberly-Clark Worldwide, Inc. | Absorbent garment with transverse and longitudinal stretch |
US6582810B2 (en) * | 2000-12-22 | 2003-06-24 | Kimberly-Clark Worldwide, Inc. | One-step method of producing an elastic, breathable film structure |
AR035104A1 (es) * | 2001-08-13 | 2004-04-14 | Clopay Plastic Prod Co | Peliculas microporosas de varias capas y metodo para su fabricacion |
US6638636B2 (en) * | 2001-08-28 | 2003-10-28 | Kimberly-Clark Worldwide, Inc. | Breathable multilayer films with breakable skin layers |
EP1453668A1 (en) * | 2001-12-12 | 2004-09-08 | Kimberly-Clark Worldwide, Inc. | Nonwoven filled laminate with barrier properties |
US6682512B2 (en) * | 2001-12-18 | 2004-01-27 | Kimberly-Clark Worldwide, Inc. | Continuous biaxially stretchable absorbent with low tension |
US7226880B2 (en) * | 2002-12-31 | 2007-06-05 | Kimberly-Clark Worldwide, Inc. | Breathable, extensible films made with two-component single resins |
US7220478B2 (en) * | 2003-08-22 | 2007-05-22 | Kimberly-Clark Worldwide, Inc. | Microporous breathable elastic films, methods of making same, and limited use or disposable product applications |
-
2005
- 2005-02-01 US US11/048,408 patent/US20060172137A1/en not_active Abandoned
-
2006
- 2006-01-30 MX MX2007009103A patent/MX2007009103A/es unknown
- 2006-01-30 BR BRPI0606134-6A patent/BRPI0606134A/pt not_active IP Right Cessation
- 2006-01-30 CN CNA2006800036524A patent/CN101175630A/zh active Pending
- 2006-01-30 EP EP06719872A patent/EP1843896A4/en not_active Withdrawn
- 2006-01-30 WO PCT/US2006/003218 patent/WO2006083765A2/en active Application Filing
- 2006-01-30 JP JP2007554151A patent/JP2008538194A/ja active Pending
- 2006-01-30 CA CA002596162A patent/CA2596162A1/en not_active Abandoned
-
2007
- 2007-06-29 US US11/771,412 patent/US7799418B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102438824A (zh) * | 2009-05-21 | 2012-05-02 | 陶氏环球技术有限责任公司 | 包含粗糙化材料的聚合物膜 |
CN103496239A (zh) * | 2013-09-29 | 2014-01-08 | 佛山华韩卫生材料有限公司 | 一种特殊wvtr透气膜及其生产工艺 |
CN103496239B (zh) * | 2013-09-29 | 2014-08-27 | 佛山华韩卫生材料有限公司 | 一种特殊wvtr透气膜及其生产工艺 |
Also Published As
Publication number | Publication date |
---|---|
WO2006083765A2 (en) | 2006-08-10 |
EP1843896A4 (en) | 2010-09-29 |
US20070248835A1 (en) | 2007-10-25 |
US20060172137A1 (en) | 2006-08-03 |
CA2596162A1 (en) | 2006-08-10 |
BRPI0606134A (pt) | 2008-03-04 |
JP2008538194A (ja) | 2008-10-16 |
MX2007009103A (es) | 2007-09-12 |
WO2006083765A3 (en) | 2007-11-22 |
US7799418B2 (en) | 2010-09-21 |
EP1843896A2 (en) | 2007-10-17 |
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