CN1277009C - 导电性织物 - Google Patents

导电性织物 Download PDF

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CN1277009C
CN1277009C CNB011100753A CN01110075A CN1277009C CN 1277009 C CN1277009 C CN 1277009C CN B011100753 A CNB011100753 A CN B011100753A CN 01110075 A CN01110075 A CN 01110075A CN 1277009 C CN1277009 C CN 1277009C
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fabric
warp
parallel
conductive fabric
metal
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CN1320734A (zh
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高木进
织田茂和
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Seiren Co Ltd
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Abstract

本发明提供一种防止树脂泄漏、柔软性、防止线绽开和导电性及电磁波屏蔽性均优的导电布。其特征在于，在织物上电镀的导电性织物中，构成该织物经线在织物表面占有率90-110%，而纬线在织物占有率为40-80%。

Description

导电性织物
技术领域
本发明涉及一种防止树脂泄漏、柔软性、防止线绽开性、导电性及电磁波屏蔽性均优的导电性织物。
背景技术
如所周知，通过在织物上形成金属被膜而赋于导电性，作为电磁波屏蔽材料和接地材料使用。
在这样的用途中，除导电性或电磁波屏蔽性外，由于多半使用于安装在电子机器的筐体上，所以还要求所使用的导电性织物要有柔软性。
并且，在将上述导电性织物用于这些用途时，多半要把导电性织物切小成为给定的尺寸，并切细之后才能使用，因此便产生织物的线绽开的问题。
为此，要在导电性织物上赋予丙烯腈等树脂，以便使构成织物的线不绽开。
此外，在用于这些用途的情况下，多半还要求有耐燃性，因此还需对该导电性织物赋予阻燃剂。
还有，在将导电性织物安装在电子机器筐体上使用时，多半要在导电性织物上涂布粘合剂或热熔胶粘剂。
并且，在涂布这些树脂时，要防止所赋予的树脂泄漏，以保持导电织物的品位不致降低。为此，要进行提高织物线密度的织制与加工，减少形成织物的纤维间的空隙，防止树脂等的泄漏。
此外，如所周知，在如此提高了线密度的织物上形成金属覆盖的产物提高了屏蔽性。
然而，一般说来，若提高织物的线密度，则具有有损于织物柔软性的倾向，通过电镀，使织物变得更硬。为此，例如，在氨基甲酸乙酯泡沫材料等上面卷绕这样的导电性织物加工成泡沫垫片而作为基板的地线材料使用时，与电子机器筐体的密合性差，作为电磁波屏蔽材料，是不理想的。
为此，通过使用极细纤维丝或加工丝，可提高织物的柔软性。
还有，为了降低线的绽开，也可以使用线绽开较少的平纹织组的织物。
然而，在使用极细纤维丝或加工丝的情况下，在电镀加工前尽管是柔软的，但是通过电镀构成织物的复合丝受到约束，犹如，成为单丝那样，由于缝线受到约束而有损于柔软性。
并且，要只是提高织物的密度，难于使织物的经线与纬线的交点部空隙全无。由于纤维间有空隙，所以难以谋求提高电磁波的屏蔽性或导电性。此外，在后加工中涂布树脂时，还有如上所述的树脂泄漏等问题。
并且，使用极细纤维丝或加工丝和提高丝密度构成织物，均导致成本上升，而且，由于增加原材料的表面积而增加电镀加工时的金属使用量也可导致电镀加工成本上升。
发明内容
本发明的目的在于解决这些已有的技术问题，特别是提供一种确保柔软性，同时防止树脂泄露，并具有高度的导电性和电磁波屏蔽性的织物。
本发明是为解决上述问题的，其构成如下。
即，其特征在于在覆盖金属导电性织物中，构成织物的纬线在织物表面占有率为90-110％，而且，纬线在织物表面占有率为40-80％。
并且，其特征在于，所述织物为平纹织组织。
并且，其特征在于，构成织物的纤维为合成纤维长丝。
并且，其特征在于，向织物上的金属覆盖为无电解电镀法的覆盖。
并且，其特征在于，覆盖的金属至少为银、铜、镍、锡及它们的合金的一种。
本发明中的所述的织物表面占有率，是指在图1所示的织物中，为如下表示：
经线在织物表面占有率(％)＝经线的宽度(A)
/经线的间距(B)×100
纬线在织物表面占有率(％)＝纬线的宽度(C)
/纬线间距(D)×100
本发明的导电性织物为：经线在织物占有率为90-110％，而且，纬线在织物占有率为40-80％。
这样，将织物的经线密度加大，使经线在织物表面占有率为90-110％，以织物表面为主由经线覆盖，而纬度密度减小，使纬线在织物表面占有率为40-80％，这样就可以使经线与纬线的交点部的空隙微细化，增加纬线的自由度，提高织物的柔软性。
经线在织物表面占有率为90％以下时，经线与纬线的交点部的空隙增大，但若超过110％时，则不仅有损织制性，而且也有损织物的柔软性。而且，相邻近的经线之间重叠加大，在电镀加工时有碍于电镀液的浸透，从而难于电镀到织物的内部。
若纬线在织物表面占有率为40％以下，则丝容易滑动而难于加工，但若超过80％，则有损织物的柔软性，经线与纬线的交点空隙增大。
此外，为了使构成织物的丝在织物表面的占有率处于上述范围，也可对织物进行轧光处理。
通过采取这样的构造，与已有的织物相比较，可得到柔软、而且涂布有树脂时树脂泄漏小并具有高度的导电性和电磁波屏蔽性的导电性织物。
用于本发明的纤维种类，可使用有尼龙、聚酯、丙烯腈等合成纤维或棉、麻等天然纤维，但从耐久性这一点来看，合成纤维，其中以尼龙和聚酯更为理想。
所使用的纤维总纤度，10-150旦(尼尔)是理想的，30-100旦更为理想。而单丝旦纤度0.1-10旦是理想的。纤维总纤度为10旦以下时，有强度及电镀加工性差的情况，若超过150旦，则织物手感变硬是不理想的。并且，在单丝旦为0.1旦以下时，则成本方面不利，而且电镀加工性能可变差。若超过10旦，则织物手感变硬而不理想。
此外，所用的丝的形状，圆截面丝和异形截面丝等，均可使用。
金属的覆盖可使用已有的方法进行，但最好是使用无电解电镀法。作为覆盖金属，至少可使用银、铜、镍及锡金属以及它们的合金中的一种。
其次，导电性织物延伸度，在试验布宽度1cm加1kg负荷时，最好是1.5％以下。若为1.5％以上，则截断时等的加工性有问题，而且得不到高的尺寸精度，尤其，在以延伸状态下安装在电子机器筐体上时，有可能降低屏蔽性。
附图说明
以下对附图作简单说明。
图1为表示本发明织物的经线及纬线覆盖率的略图。
在图中，1-经线，2-纬线，A-经线宽度，B-经线间距，C-纬线宽度，D-纬线间距。
具体实施方式
实施例
以下示出实施例来说明本发明的导电性织物，但本发明不受任何限制。
评价方法
1.树脂泄漏(Beck leak)
用目视判断了涂布有树脂的导电性织物树脂的泄漏程度
○：树脂泄漏少；
×：树脂泄漏多。
2.柔软性
用手模已电镀的织物(手感)评价
○：柔软
△：稍硬
×：硬
3.延伸度
测定了试验布宽度1cm加1kg负荷的织物延伸度。
○：1.5％以下
×：1.5％以上
4.电镀适当
用目视评价了无电解铜电镀的织物的经线与纬线电镀状态。
○：交点部的电镀析出良好
×：交点部的电镀析出不良
5.导电性
测定方法使用电阻值测定器(三菱化学株式会社Loresta-MP)，通过四端子四探针测定法(JIS-K-7194)测定了表面电阻。单位为Ω/□。
6.屏蔽性
测定方法是作成由关西电子工业振兴中心生驹电波测定所研制的测定单元相似的构件，通过带跟踪发生器的光谱分析器(Hewlett-Packard社制HP8591EM)由所述测定单元接受信号部经过测定的样品接受500MHz发送信号，并由光谱分析器进行了计量。单位为dB。
实施例1
将50d-24f的聚酯复丝用作经线、纬线的平纹织物精练后，在190℃下经2分钟热定形，使经线在织物表面占有率为95％，纬线在织物表面占有率为72％。此后，织物在含有50克/升的NaOH溶液中在90℃下浸渍10分钟，然后干燥。将浸渍后的织物浸入Pd/Sn胶体催化剂中40℃下经过5分钟。此后，将涂布过的织物进洗涤并浸渍于含0.1NHBF4溶液中数分钟。然后将织物洗涤并浸渍在无电解的铜溶液中，这样铜溶液的组成为：CuSO45H2O 15g/l，乙二胺四乙酸(40％)50cc/升、NaOH 15g/l，和HCHO(37％)10cc/升，在40℃下进行操作。这样就使织物镀上了铜被膜。进而，将塔克纶(toaclon)SA6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸酯交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps的树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃下干燥2分钟，其性能如后面的表1所示。
实施例2
将50d-36f的聚酯复丝用于经线、纬线的平纹织物精练后，在190℃经2分钟热定形，使经线在织物表面占有率为99％，纬线在织物表面占有率为75％。采用与实施例1相同的方法对本织物进行电镀。进而，将塔克纶AS6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸酯交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃下干燥2分钟，其性能如后面表1所示。
比较例1
将50d-24f的聚酯复丝用于经线、纬线的平纹织物精练后，在190℃经2分钟热定形，使经线在织物表面有率为72％、纬线在织物表面占有率为85％。采用与实施例1相同的方法对本织物进行电镀。进而，将在塔克纶AS6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸酯交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps的树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃干燥2分钟，其性能如表2所示。
比较例2
将50d-36f的聚酯复丝加工丝用于经线、纬线的平纹织物精练后，在190℃经2分钟热定形，使经线在织物表面占有率为89％，纬线在织物表面占有率为61％。采用与实施例1相同的方法对本织物进行电镀。进而，将在塔克纶SA6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸脂交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps的树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃下干燥2分钟，其性能如后面的表2所示。
比较例3
将50d-72f的聚酯复丝加工丝用于经线、纬线的平纹织物精练后，在190℃经2分钟热定形，使经线在织物表面占有率为90％，纬线在织物表面占有率为85％。采用与实施例1相同的方法对本织物进行电镀。进而，将在塔克纶SA6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸脂交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps的树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃下干燥2分钟，其性能如后面的表2所示。
比较例4
将50d-24f的聚酯复丝用于经线、纬线的平纹织物精练后，在190℃经2分钟热定形，使经线在织物表面占有率为90％，纬线在织物表面占有率为90％。采用已有公知的无电解电镀法对本织物进行镀铜。进而，将在塔克纶SA6218(Toupe社制丙烯腈系树脂)100重量份、UD交联剂(大日精化工业株式会社制异氰酸脂交联剂)1.5重量份中加入甲苯并将粘度调整为25000cps的树脂液，通过刮刀涂层法以固体部分5g/m2涂布在织物表面上，然后在130℃下干燥2分钟，其性能示于下列表2。
                    表1
  实施例1   实施例2
  经线表面覆盖率(％)   95   99
  纬线表面覆盖率(％)   72   75
  树脂泄漏   ○   ○
  柔软性   ○   ○
  延伸度(％)   ○   ○
  电镀适当   ○   ○
  电镀量(g/m2)   11   12
  导电性(Ω/□)   0.06   0.06
  屏蔽性(dB 500MHz)   80   80
                                表2
  比较例1   比较例2   比较例3   比较例4
  经线表面覆盖率(％)   72   89   90   90
  纬线表面覆盖率(％)   85   61   85   90
  树脂泄漏   ×   ×   ○   ○
  柔软性   ○   ○   Δ   ×
  延伸度(％)   ○   ×   ×   ○
  电镀适当   ○   ×   ×   ×
  电镀量(g/m2)   11   13   14   12
  导电性(Ω/□)   0.07   0.07   0.07   0.06
  屏蔽性(dB 500MHz)   75   75   85   80
本发明提供的导电性织物可用作树脂泄漏少、柔软性、线绽开防止性能、导电性、电磁波屏蔽性均优的电磁波屏蔽材料和接地材料。

Claims (9)

1.一种导电性织物，其特征在于，在覆盖金属的导电性织物中，构成该织物经线在织物表面占有率为90-110％，而且，纬线在织物表面占有率为40-80％。
2.根据权利要求1所述的织物，其特征在于，织物为平纹织组织。
3.根据权利要求1或2所述的导电性织物，其特征在于，构成织物的纤维为合成纤维长丝。
4.根据权利要求1或2所述的导电性织物，其特征在于，向织物上的金属覆盖为无电解电镀法的覆盖。
5.根据权利要求3所述的导电性织物，其特征在于，向织物上的金属覆盖为无电解电镀法的覆盖。
6.根据权利要求1或2所述的导电性织物，其特征在于，覆盖的金属至少为银、铜、镍、锡及它们的合金的一种。
7.根据权利要求3所述的导电性织物，其特征在于，覆盖的金属至少为银、铜、镍、锡及它们的合金的一种。
8.根据权利要求4所述的导电性织物，其特征在于，覆盖的金属至少为银、铜、镍、锡及它们的合金的一种。
9.根据权利要求5所述的导电性织物，其特征在于，覆盖的金属至少为银、铜、镍、锡及它们的合金的一种。
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