CN1145085A - 用于多孔膜的粘合剂 - Google Patents

用于多孔膜的粘合剂 Download PDF

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CN1145085A
CN1145085A CN95192483A CN95192483A CN1145085A CN 1145085 A CN1145085 A CN 1145085A CN 95192483 A CN95192483 A CN 95192483A CN 95192483 A CN95192483 A CN 95192483A CN 1145085 A CN1145085 A CN 1145085A
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R·E·V·尤里
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Abstract

披露了一种具有热熔粘合剂组合物、并含有液体添加剂的微孔膜的层合物。所述热熔粘合剂由聚丁烯聚合物或聚丁烯与任选的增粘剂和/或增塑剂的共聚物所形成,这样使得微孔膜在粘合剂接触区域的L值至少为70,最好至少为80。所述液体添加剂最好是增塑油如矿物油。

Description

用于多孔膜的粘合剂
发明的领域
本发明涉及用于将热塑性多孔膜粘合至基层上的热熔结构的粘合剂。
发明的背景
可处理的吸附制品通常需要一层不渗透液体的外层聚合物膜或背衬,以防止所吸附的液体穿透该制品并与穿着者的衣服或皮肤相接触。由于这种不渗透液体的膜层常不透气、不允许湿蒸气透过,所以这种制品常使人感到闷热、不舒服并且有时还会导致皮疹。因此,建议使用不渗透液体的微孔膜使吸附制品可透气。一种普通的可处理的微孔膜填充有约大于30%量的颗粒填料。但是,这种可透气的颗粒填充的膜在柔软性、手感以及对粘合带产生污染方面不符合要求。
美国专利4,902,553提出一种不会发出声响的蒸气渗透性微孔聚合物膜,用该膜作为可处理的吸附产品(如尿布或失禁产品)的外层不渗透液体的背片。该专利提出使用一种不渗透液体但可渗透蒸气的微孔膜,这种膜使水蒸气能够逸出,从而降低了吸附产品引起皮疹(如尿布皮疹或其它类型的皮肤发炎)的可能性。这种微孔膜是一种柔软的、不会发出声响的、可渗透蒸气、不渗透液体的膜。这种膜不发出声响的性能是通过在膜中掺入可降低声响的液体添加材料并通过压印而得到的。其它描述含有液体添加剂的微孔膜的专利包括美国专利4,539,256;4,609,584;4,726,989或4,824,719。在这些专利中所描述的微孔膜也适合于用作保健制品或吸附制品中的不渗透液体的微孔膜。但是,这种膜的缺点是在热熔粘合接触点上,该膜具有由不透明向半透明变化的趋势。当以间歇粘合方式使用常规热熔粘合方法将膜粘合至基层上时,这种变化特别显著和有害。这会导致产品不美观,而且这种产品在微孔膜和基层之间的粘合力较差。当液体添加剂是一种增塑油(如矿物油)时,这种变化特别成问题。尽管本发明人评估了许多将这种微孔膜粘合至常规基层上所用的常规热熔压敏粘合剂制剂,但是在粘合接触点上使膜变透明(clearing)的结果却是相同的。这种膜的透明还会扩散至不直接与粘合剂接触的膜的邻近区域。经过广泛的研究和筛选,本发明人研制了能解决上述问题(特别能用于上述含有液体添加剂的微孔膜)的粘合剂。
附图简述
图1是本发明粘合剂与现有粘合剂的性能比较图。
发明的简述
本发明提供一种微孔膜层合物,该层合物最好含有一种液体添加剂(如增塑油)并通过经改进的、特别适合多线(multi-line)或间歇粘合使用的热熔粘合剂组合物粘合至基层(如吸附垫片)上,这种粘合剂不会使微孔膜透明。
本发明层合物使用基于结晶聚丁烯聚合物的热熔粘合剂组合物,提供具有至少5秒、最好大于1分钟开启时间(open time)的热熔粘合剂。该热熔粘合剂最好含有100份聚丁烯、聚丁烯共聚物或其混合物,0-300份相容性固态增粘树脂,0-40份增塑剂以及任选的0-50份填料和0-15份聚合物降粘添加剂。较好实例的描述
本发明层合物的热熔粘合剂向微孔膜,特别是含液体添加剂的微孔膜(可参见美国专利4,902,553;4,539,256;4,609,5874;4,726,989;或4,824,719)提供高剪力和剥离粘性,而不使膜透明或由不透明转化成半透明。与热熔粘合剂粘合接触的点上以及邻近该粘合接触点的区域中,在层合物中L值至少为80的微孔膜经过15天热老化后,L值至少保持为70,宜至少保持为75,最好保持为80。用2000g辊压紧(rolldown)并经15天热老化后,层合物中的微孔膜与基层的T剥离粘性至少为20g/25mm,最好至少为50g/25mm。
在上述专利中描述的、在层合物中较好的含液体添加剂的微孔膜包括一种微孔膜,该微孔膜的制备是通过将可结晶的聚合物材料在高于该聚合物材料的熔融温度溶入液体添加剂中,并使该熔体形成膜(如通过挤塑),然后使均相的溶液以适合于可结晶聚合物能结晶成不同的、相互联接的相的速率冷却,在环境或使用条件下该聚合物与添加剂是非相容的。然后,将不同相的膜材料单轴向或多轴向取向,使膜具有微孔,其中空穴含有现在不同相的液体添加剂。该液体添加剂最好具有增塑性能。可使用的添加剂材料包括饱和烃如矿物油、甘油、凡士林、低分子量聚乙烯、聚环氧乙烷、聚环氧丙烷、聚环氧丁烷、软聚乙二醇、增塑油等。较好的添加剂材料为增塑油,矿物油由于其相对低廉的价格和优良的成膜性能而特别受到青睐。可结晶的聚合材料宜为烯烃如聚烯烃,或缩聚物如聚酯或聚酰胺。最好为聚烯烃如结晶等规聚丙烯、聚乙烯、聚丁烯、聚乙基戊烯、及其共聚物、嵌段共聚物和经改性的形式。
添加的液体的量可占成膜后膜的重量的约5-80%,较好约为5-50%,最好约为10-30%。
可结晶的聚合物和分相添加剂的描述也可参见美国专利4,247,798和4,100,238。例如,就等规聚丙烯而言,这些专利描述了可分相的添加剂(如聚1-丁烯、聚乙烯蜡、低分子量聚乙烯、醇、醛、胺、酯如苯甲酸甲酯、醚如二苯醚、烃如反式均二苯代乙烯或酮)的应用。
还可使用成核试剂(如描述在美国专利4,824,718和4,726,989中的成核试剂),使得聚合物材料冷却时均匀地结晶。这种成核试剂最好是至少一种主要试剂,通常为有机酸或衍生物,这种成核试剂在高于热塑性聚合物的晶体转化温度至少10℃时溶入液体添加剂中,其用量占整个体系重量的0.05-5%,以及任选的、大约相同使用浓度的次要惰性成核试剂,该次要成核试剂常包括无机颗粒材料,如滑石粉、二氧化钛、碳酸钙、碳酸镁、碳酸钡、硫化镁、硫化钡等。合适的有机酸包括单元酸或多元酸,如羧酸、磺酸、膦酸和固态有机醇,如二亚苄基山梨糖醇。较好的有机酸包括己二酸和丁二酸,较好的次要成核试剂是滑石粉。热塑性可结晶聚合物结晶析出后,可制得经取向或未经取向的、在一个方向上拉伸比至少为0-3,最好为1.5-2.5的膜。如果该膜是未经取向的,则最好将液体添加剂从该膜上洗去。
微孔膜的厚度通常为5-250微米,最好为20-200微米。从成本和湿蒸气的透过性的观点看,较薄的膜是优选的。较厚的膜提高了对高腐蚀性粘合剂的张力性能。
热熔粘合剂聚合物是一种具有粘性开启时间至少为5秒钟、常大于1分钟、经常大于5分钟的粘合剂。为进行常规热熔粘合剂喷涂,该粘合剂的粘度宜小于10,000厘泊(cp),最好小于5,000cp。为进行挤塑(如熔融吹塑),该粘合剂的粘度可高至50,000cp或更高。
用在热熔粘合剂制剂中的结晶热塑性聚合物宜为1-丁烯的均聚物或共聚物或其掺合物。较好是1-丁烯与1-30摩尔%α烯烃共聚单体(最好是聚乙烯、聚丙烯、2-丁烯或C5-C8α烯烃)的共聚物。该共聚单体最好占整个聚合物摩尔数的2-15%,其中最好的共聚单体为乙烯单体。这些聚合物和共聚物可参见美国专利4,937,138。无定型聚合物(如聚丙烯、聚己烯和聚辛烯)形成的粘合剂会使微孔膜透明。
用于基于可结晶聚合物的粘合剂的增粘组分通常包括单独使用的固态增粘树脂或与液态增粘树脂和/或液态增塑剂一起组合使用的固态增粘树脂。增粘树脂最好选自与弹性聚合物或嵌段共聚物至少部分相容的树脂。
用于层合物热熔粘合剂组合物中的合适的增塑剂包括在含液体添加剂微孔膜中的可分相的添加剂(包括蜡,例如石油蜡、Fischer-Tropsch蜡、微晶蜡、聚烯烃蜡;增塑油,如对氨基萘磺酸油、石蜡油、芳香油、聚丁烯油和矿物油)。在100份可结晶聚合物中,蜡、增塑油或其它增塑剂的用量可高至40份。在100份聚合物中,低分子量增塑剂(平均分子量小于500)或在低于50℃时具有足够液体比例的增塑剂(如增塑油、石蜡或液态增粘剂)的用量最好小于20份;高分子量(平均分子量高于1000)增塑剂、在低于50℃时具有很小液体含量的增塑剂(如蜡)或高熔点增塑剂的用量最好小于35份。
可加入某些蜡和/或增塑剂将粘合剂的粘度降低至适宜的范围。还可在聚合物中加入降低分子量或聚合物粘度的添加剂,这种添加剂包括自由基引发剂,如过氧化物(例如2,5-二甲基2,5-双叔丁基过氧己炔-3)或过渡金属催化剂等,在100份聚合物中,这种添加剂的用量宜为0.01-50份,最好为0.01-5份。
可向粘合剂制剂中加人填料以增加微孔膜在粘合接触点上的不透明性或L值。填料对本发明低粘度热熔粘合剂特别有用,它会轻微地降低微孔膜在粘合接触点而不是邻近区域上的L值。合适的填料包括用于颗粒填充的微孔膜中的颗粒,从不透明性和成本的观点看,二氧化钛是较好的。在100份聚合物中,填料的用量宜为0-25份,最好小于15份。
还可向优选的粘合剂制剂中加入少量的成核试剂以增加结晶和结晶速率。这种成核试剂包括等规聚丙烯、硬脂酰胺或1-萘乙酰胺,按总的粘合剂制剂计,这种成核试剂的用量宜为0.01-10份,较好为0.1-5份,最好小于1份。本领域中已知的其它成核试剂描述在美国专利4,937,138中。
所使用的较好的聚丁烯共聚物可掺合有聚丁烯均聚物,聚合物与共聚物的掺合比宜为1/10-10/1,最好为2/10-10/2。
可通过插入官能单体或通过与诸如马来酸酐或其它自由基活性的改性剂进行接枝对聚丁烯共聚物进行改性。
通常,该微孔膜粘合剂层合物还包括一层基层,该基层是可透气的丝网或其它材料,包括常规的非纺织丝网如通过纺粘、射流喷网、熔喷、梳理或其余方法形成的非纺织丝网、纺织物、纸或吸附毡(batts),其中层合物结构是可处理的吸附制品(如尿布、妇女卫生巾或成人失禁产品)中的一个组分。在一个较好的实例中,通过加热、加压、超声等对层合物进行点状或纹路状压印。压印可软化层合物的手感并可部分掩盖膜的轻微透明。
                      粘合剂制备
将预先掺合的粘合剂组分加至单螺杆挤塑机中,并在至少为350°F(177℃)的温度下混合/熔融该掺合物制得粘合剂。将粘合剂样品收集在一个白铁盆中,随后将其切成小片,接着用这种小片进行热熔喷涂。对粘合剂组合物的评估结果列于表1和表2。并在表1中列出了粘合剂的Brookfield粘度。
实施例1-8和11-18
将粘合剂样品A-Q(粘合剂H除外)熔化,并用刮刀涂布至微孔膜上,涂布厚度列于表3和表4。所使用的微孔膜是根据美国专利4,539,256和4,726,989制得的。该微孔膜组合物由70重量%聚丙烯(#5D45,熔体流动指数为0.65的聚丙烯,购自Shell Chemical Co.,)、29.9重量%矿物油(USP级的Amoco White#31,购自Amoco Oil Co.)以及0.1重量%二亚苄基山梨糖醇成核试剂(Millad3905,购自Milliken Chemical)组成。微孔膜的厚度约为1.8mil(45微米)。得到的这些样品的试验数据和不透明度值列于表3和表4。在图1中,列出了实施例1-8、比较例9和10以及基层膜X在50℃、热老化至15天的膜的不透明度值。比较例9和10
作为对照,对两种市售的热熔粘合剂进行评估。用上述实施例中的方法将Ecomelt#H-406和National Starch#34-5566(均为由烃型增粘剂增粘的苯乙烯-丁二烯共聚物粘合剂)涂布至微孔膜上。这两个比较例样品的不透明度值列于表3。
                            表1
   A   B   C    D    E    F    G     H     I
 DP8910PC  100   98   97    85    85    85    78    49    87
 “IRGANOX”1076   -    2    2    -    -    -     2     2     2
  “ARKON”P-100   -    -    -    10    10    10    10    10    10
 “LUPERCO”101-XL   -    -    1    -    -    -     -     -     1
  “MEKON”   -   -   -    5    -    -     -     -     -
“UNILIN”700   -   -   -    -     5    -     -     -     -
 “POLYWAX”2000   -   -   -    -     -     5    10    39     -
   Brookield粘度*(cp) 7500  8530  3600  7970  6300  6600  8780  3675  3925
*根据ASTM#D2556,使用#DV-1型Brookfield数字粘度计,经至少1小时加热后在170℃测得。
                 表2
    组分    J    K     L     M     N     O     P     Q
  DP8910PC    78   73.5    69    49    88    78    69    88.7
“IRGANOX”1076     2     2     2     2     2     2     2     1
 “ARKON”P-100     20   24.5     29     49    -    -    -      -
“PICCOLYTE”S-115     -    -     -     -    10    20    29      -
“ESCOREZ”5300     -    -     -     -    -    -    -     9.9
 “LUPERCO”101-XL     -    -     -     -    -    -    -     0.4
                          表3
  实施例 粘合剂类型 粘合剂厚度(微米)  L值(%)初始    L值(%)经1天热老化    L值(%)经3天热老化   L值(%)经5天热老化    L值(%)经7天热老化   L值(%)经9天热老化   L值(%)经15天热老化
 1     A     48   84.62   84.25    84.96    84.52    84.65    83.97    83.51
 2     B     56   84.11   84.25    84.43    84.12    84.16    84.03    83.39
 3     C     58   84.62   84.25    84.23    83.61    83.38    82.93    83.22
 4     D     38   84.11   82.68    82.22    79.71    79.28    78.88    79.83
 5     E     53   84.42   84.72    84.55    84.42    84.11    83.77    83.39
 6     F     43   84.63   83.91    83.71    82.90    82.84    82.53    82.35
 7     G     41   84.22   84.08    83.84    83.46    82.93    82.79    82.33
 8     I     46   84.70   83.31    82.51    81.89    81.52    80.74    80.49
 C9   ECOMELTH-406     38   84.01   70.14    65.38    63.71    62.08    59.97    58.84
 C10   N.S.#34-5566     38   80.22   27.48    31.62    33.10    36.52    24.45    33.32
                        表4
实施例 粘合剂类型 粘合剂厚度(微米) L值(%)初始  L值(%)经1天热老化  L值(%)经2天热老化  L值(%)经3天热老化  L值(%)经6天热老化  L值(%)经7天热老化
  11     J     81  84.14   84.36   83.53   83.46   81.75   81.55
  12     K     69  83.46   83.31   82.98   82.64   80.39   80.56
  13     L     43  83.95   83.1O   82.00   81.37   80.17   79.66
  14     M     66  84.53   84.75   84.14   83.62   82.34   82.01
  15     N     61  84.36   84.29   84.11   83.46   82.88   82.47
  16     O     25  83.97   83.52   82.88   82.37   81.46   80.97
  17     P     69  84.70   84.62   83.89   83.69   82.73   82.58
  18     Q     66  84.62   84.57   84.55   84.38
实施例19-32
在热熔粘合剂喷枪(Nordson3500系列,购自Nordson Corp.)的熔融腔中,在330°F(166℃)温度下将约1000克粘合剂熔化,然后通过一个0.012英寸(0.305mm)直径的喷嘴将该粘合剂喷涂至微孔膜基层(如同实施例1-18的微孔膜基层)上,在微孔膜上产生约1英寸(2.54cm)宽的螺旋形粘合剂喷射图形。沿6英寸(15.2cm)宽的微孔膜试样的长度方向(或纵向)喷涂3列粘合剂。喷涂的粘合剂列之间留有约1英寸(2.54cm)宽的不喷涂粘合剂区域。
然后,立即用手将非纺织物放在粘合剂表面上,并使用一根4.5磅(2公斤)的橡胶辊用手将微孔膜/粘合剂/非纺织物层合物来回(with two passes)压紧。所使用的非纺织物通常是用于可处理尿布内部上层片的材料(一种点粘合纺粘聚丙烯基重为0.8oz/yard2(25.8g/m2),购自International Paper Co.)。
试验该层合物的初始以及热老化(在50℃)后的T-剥离粘性。初始T-剥离粘性指在制得层合物的3天内对试样进行试验。结果列于表5。比较例33-35
为了进行比较,对几种无定形聚α-烯烃聚合物进行了评估。所评估的聚合物是丙烯均聚物(“REXTACTM”2115,购自Rexene Products Co.)、乙烯-丙烯共聚物(“REXTACTM”2304,购自Rexene Products Co.)以及丁烯-丙烯共聚物(“REXTACTM”2715,购自Rexene Products Co.)。这些聚合物的结晶热分别为25、15和6J/g,相比之下等规聚丙烯的结晶热为95-100J/g。
将聚合物熔化在手提式热熔粘合剂喷枪的样品腔中,并以螺旋形喷射图形将其喷涂在与实施例1-l8相同的微孔膜试样上,然后立即用手将相同于实施例1-18中所用的非纺织物放于粘合剂表面上。在与无定形聚合物接触处,全部三个试样的微孔膜都变得透明。
                       表5
    实施例 粘合剂类型  T-剥离粘性初始  T-剥离粘性经1天热老化  T-剥离粘性经3天热老化
    19     A     225     147     143
    20     B     189     98     88
    21     C     69     123     130
    22     D     151      -     274
    23     E     164     130     104
    24     F     178      -     177
    25     G     184     178     157*
    26     H     20      -     16
    27     I     139     307     260
    28     J     180     187      -
    29     K     128      -     223
    30     N     260     250      -
    31     O     273     318      -
    32     Q     333     359     387**
*试样经4天热老化
**试样经2天热老化比较例36
将比较例9的粘合剂(“ECOMELT”H-406)在一容器中熔化,然后掺入一种蓝色的颗粒,掺入颜色的浓度应使得粘合剂中的颜色能掩盖常规粘合剂所发生的透明效应。使用点状喷射图形将粘合剂掺合物喷涂至实施例1-18的微孔膜上,覆盖率为膜总面积的12.5-50%,然后用手将非纺织物层合其上。在室温经2-3天后,得到的层合物中的膜开始变透明。尽管粘合点保持其颜色不变,但是随着透明从粘合接触点向外扩散,膜的其余部分(未涂布粘合剂的区域)变得透明了。当使用常规粘合剂时,加入有色颗粒并没有解决微孔膜的透明问题。实施例37
将一种聚丁烯基热熔粘合剂制剂:
DP-8910                 65%
Arkon P-100             10%
聚丁烯油(Indapol#H-1900)20%
加热并降解至呈浅棕色。这样做的目的是降低粘合剂的粘度以便使微孔膜产生轻微的透明。降解后,加入5%TiO2以观察经过喷涂以及热老化后该TiO2能否掩盖微孔膜的透明。如所有前面的试样那样,将经粘合剂涂布的膜层合在非纺织物上。尽管所得层合物中的膜在粘合线上显示出轻微的褪色,但是在该粘合线外没有观察到膜的褪色。
DP 8910PC是聚丁烯/聚乙烯共聚物(6%乙烯含量),广角X-射线测得具有34%结晶度,购自Shell Chemical Co.;
“IRGANOXTM”1076是一种购自Ciba-Geigy的位阻酚抗氧化剂;
“ARKONTM”P-100是一种氢化的C9固态增粘树脂,购自Arakawa ChemicalCo.;
“PICCOLYTETM”S-115是一种β蒎烯固态增粘树脂,购自Hercules Inc.;
“ESCOREZTM”5300是一种氢化烃固态增粘树脂,购自Exxon Chemical.;
“LUPERCOTM”101-XL是一种过氧化物,购自Elf Atochem North AmericaInc.;
“MEKONTM”是一种白色微晶石油基蜡,购自Petrolite;
“UNILINTM”700是一种饱和的长链线型醇,购自Petrolite;
“POLYWAXTM”2000是一种聚乙烯蜡,其数均分子量为2000,熔点为126℃,购自Petrolite;
“INDPOLO”H=1900是一种聚丁烯油,购自Amoco。
                            试验方法
下列试验用于评估用作微孔膜的聚丁烯基结构的粘合剂。T-剥离粘性试验
本试验在常温和常湿(23℃,50%相对湿度)下进行,在试验前将微孔膜/非纺织物层合物试样在试验条件下放置24小时。用1×6英寸(2.5cm×12.7cm)横向切下的层合物试样进行试验。对每个试样进行切割使得试样至少一端无粘合剂。然后将非纺织物层夹在恒速“INSTRONTM”拉伸试验机的下端夹头中,并将微孔膜层夹在拉伸试验机的上端夹头中。在滑动横梁(crosshead)的速度为12英寸/分钟(30.5厘米/分钟)时,记录将微孔膜从非纺织物上以T-剥离形式(180°)剥离所需要的力。将膜从非纺织物上剥离所需的力以克/25mm宽表示,所给出的值至少是6次试验(两个试验样品,分别具有三个独立的粘合试验区域)的平均值。不透明度试验
测量涂有粘合剂的微孔膜的不透明度(或白色组分)以评估在微孔膜上的粘合剂的透明效应。不透明度可以以其LAB颜色试验的L值表示。根据TAPPI试验步骤#T-524用“LABSCANTM”色谱仪(Spectro Colorimeter)(弗吉尼亚,Reston的Hunter Associates Laboratory,Inc.,制)测得初始和热老化(在50℃下高达7-15天)后的L值数据。给出的数据是两次试验的平均值。
在不偏离本发明的精神和范围的情况下,本发明的各种变化和改进对熟悉本领域的人来说是显而易见的,并且本发明并不限于所例举的用于说明的实例。

Claims (21)

1.一种层合物结构,包括含有液体添加剂的热塑性微孔膜、一层连续的或间隙的热熔粘合剂涂层,其中含有液体添加剂的微孔膜在粘合接触点上的L值至少为70,所述热熔粘合剂包括:
100份聚丁烯聚合物、共聚物或掺合物,其特征在于共聚物包括1-30摩尔%C2-C3或C5-C8的α烯烃共聚单体,
0-300份与聚丁烯相可相容的固态增粘树脂,
0-20份液态增粘剂,
0-40份增塑剂,
0-25份颗粒填料。
2.如权利要求1中所述的层合物,其特征在于在微孔膜中热塑性微孔膜层和液体添加剂形成不同的相。
3.如权利要求2中所述的层合物,其特征在于所述液体添加剂占膜重量的5-50%,并且所述微孔膜是定向的。
4.如权利要求3中所述的层合物,其特征在于所述液体添加剂占膜重量的10-30%,并且所述微孔膜在至少一个方向上定向高达3∶1。
5.如权利要求4中所述的层合物,其特征在于液体添加剂是矿物油。
6.如权利要求1-5中任何一项所述的层合物,其特征在于所述热熔粘合剂具有至少1分钟的开启时间,还含有0.01-10份聚合物降粘添加剂。
7.如权利要求6中所述的层合物,其特征在于热熔粘合剂组合物的粘度小于10,000cp。
8.如权利要求1-7中任何一项所述的层合物,其特征在于热熔粘合剂组合物的粘度小于5000,开启时间大于5分钟。
9.如权利要求1-8中任何一项所述的层合物,其特征在于在粘合剂接触点上微孔膜的L值至少为75,在粘合剂非接触区域的L值至少为80。
10.如权利要求1-9中任何一项所述的层合物,其特征在于热熔粘合剂还含有按100份粘合剂计为0-50份的填料。
11.如权利要求1-10中任何一项所述的层合物,其特征在于层合物包括用热熔粘合剂将微孔膜粘合至吸附毡结构上形成的可处理吸附制品。
12.如权利要求1-11中任何一项所述的层合物,其特征在于增塑剂包括0-20份平均分子量小于500的增塑油。
13.如权利要求1-11中任何一项所述的层合物,其特征在于粘合剂组合物包括0-35份平均分子量至少为1000的增塑剂。
14.如权利要求1-13中任何一项所述的层合物,其特征在于经15天热老化后,在形成时向层合物施以2000克压紧粘合的微孔膜与微孔基层的T-剥离粘性至少为30g/25mm。
15.如权利要求1-14中任何一项所述的层合物,其特征在于T-剥离至少为50g/25mm。
16.如权利要求1-15中任何一项所述的层合物,其特征在于增塑剂包括微晶蜡、聚丁烯油或聚乙烯蜡。
17.如权利要求1-16中任何一项所述的层合物,其特征在于粘合剂还包括0.01-5份成核试剂。
18.如权利要求1-17中任何一项所述的层合物,其特征在于成核试剂小于1份,并且其中聚丁烯是具有2-13摩尔%α烯烃共聚单体的聚丁烯共聚物。
19.如权利要求18中所述的层合物,其特征在于α烯烃共聚单体是乙烯单体。
20.如权利要求1-18中任何一项所述的层合物,其特征在于层合物还包括一层基层。
21.如权利要求20中所述的层合物,其特征在于层合物是点状或图形压印的。
CN95192483A 1994-04-12 1995-03-03 用于多孔膜的粘合剂 Pending CN1145085A (zh)

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US08/226,653 US5455111A (en) 1994-04-12 1994-04-12 Construction adhesive for porous film

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CN (1) CN1145085A (zh)
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CA2186145A1 (en) 1995-10-19
MX9604585A (es) 1997-11-29
KR970702340A (ko) 1997-05-13
US5455111A (en) 1995-10-03
AU2116095A (en) 1995-10-30
JPH09511545A (ja) 1997-11-18
AU690245B2 (en) 1998-04-23

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