CN103597549A - 电线被覆材料、绝缘电线以及线束 - Google Patents
电线被覆材料、绝缘电线以及线束 Download PDFInfo
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Abstract
本发明提供一种电线被覆材料、绝缘电线以及线束,能够实现细径化,作为绝缘电线的情况下能够不压曲地插入端子,并且能够满足挠性、电线外观也良好。电线被覆材料包括100质量份的聚氯乙烯、10~20质量份的增塑剂、1~6质量份的氯化聚乙烯、1~6质量份的MBS类树脂,并且上述氯化聚乙烯和上述MBS类树脂的总量为2~7质量份,利用上述电线被覆材料以绝缘体(2)的厚度为0.25mm以下的方式覆盖导体(1),获得电线外径小于1.1mm的绝缘电线(1)。
Description
技术领域
本发明涉及电线被覆材料、绝缘电线以及线束,更详细地说,涉及适于用作机动车、设备等的布线所使用的绝缘电线的被覆材料的电线被覆材料、使用该被覆材料的绝缘电线以及线束。
背景技术
以往,作为机动车用低压电线的绝缘体,从阻燃性和耐化学品性优良的角度出发,一般使用聚氯乙烯树脂组合物。近年来,在有效地利用机动车的有限空间的需要的基础上,对电线的绝缘体的薄壁化、对电线的细径化的要求进一步提高。
在使电线外径变细的情况下,存在端子插入连接器时电线压曲而端子难以插入的问题。因此,为了解决上述问题,本申请人等之前提出了使用弯曲弹性模量超过2.0GPa的绝缘材料的绝缘电线(参照专利文献1)。
现有技术文献
专利文献
专利文献1:日本特开2009-181850号公报
发明内容
发明要解决的课题
上述专利文献1记载的绝缘电线使用弯曲弹性模量超过2.0GPa的绝缘材料,从而使得在绝缘体的厚度为0.25mm以下的薄壁化的电线中,绝缘电线也不会压曲,端子容易插入。进而,专利文献1记载的绝缘电线使用断裂伸长率为10%以上的绝缘材料,从而能够满足机动车用电线所需的挠性。
但是,上述专利文献1记载的弯曲弹性模量超过2.0GPa的绝缘材料是非常昂贵的材料,存在绝缘电线的成本变得非常高的问题。
因此,尝试了使用以便宜的聚氯乙烯为主要成分的绝缘材料来构成绝缘电线。将绝缘材料中的增塑剂减量来提高弹性模量时,绝缘电线不会压曲从而端子的插入变得容易,然而存在无法满足挠性的问题。
另外,将增塑剂减量后的以聚氯乙烯为主要成分的绝缘材料在覆盖电线来制造绝缘电线时,存在电线的挤出性容易恶化,绝缘电线的外观变差的问题。
本发明的目的在于解决上述现有技术的问题,提供一种电线被覆材料、绝缘电线以及线束,在以聚氯乙烯为主要成分的绝缘材料中,能够实现细径化,在作为绝缘电线的情况下能够不压曲地插入端子,并且能够满足挠性,电线外观也良好。
用于解决课题的方案
为了解决上述问题,本发明的电线被覆材料的要点在于,含有聚氯乙烯,其中,含有100质量份的上述聚氯乙烯、10~20质量份的增塑剂、1~6质量份的氯化聚乙烯、1~6质量份的MBS类树脂,并且上述氯化聚乙烯和上述MBS类树脂的总量为2~7质量份。
在上述电线被覆材料中,优选上述增塑剂包括选自邻苯二甲酸酯类增塑剂、偏苯三酸酯类增塑剂、均苯四甲酸酯类增塑剂、脂族酯类增塑剂的任一种或两种以上。
本发明的绝缘电线的要点在于,导体被绝缘体覆盖,电线外径小于1.1mm,其中,上述绝缘体的厚度为0.25mm以下,上述绝缘体的材料使用上述电线被覆材料。
本发明的线束的要点尤其在于使用上述绝缘电线。
发明效果
本发明的电线被覆材料含有聚氯乙烯,其中,含有特定量的增塑剂、氯化聚乙烯以及MBS类树脂,因而通过利用该电线被覆材料构成绝缘体,即使是上述绝缘体的厚度为0.25mm以下、电线外径小于1.1mm的细径化的绝缘电线,也能够具有充分的挠性,并且在将绝缘电线插入到连接器的端子时电线不会压曲,能够可靠地插入端子,绝缘体的外观也优良。另外,细径化的绝缘电线及使用该绝缘电线的线束能够有利于使用它们的机动车、设备等的轻量化及省空间化。
附图说明
图1(a)是表示本发明的绝缘电线的一例的立体图,图1(b)是图1(a)的B-B线纵剖视图。
具体实施方式
以下,参照附图对本发明的实施方式进行详细说明。图1(a)是表示本发明的绝缘电线的一例的立体图,图1(b)是图1(a)的B-B线纵剖视图。如图1(a)、图1(b)所示,本发明的绝缘电线1的导体2的外侧周围被绝缘体3覆盖,绝缘电线1的外径(D)形成为直径小于1.1mm。
导体2可以是铜、铝、铜合金、铝合金、不锈钢等任一材质。另外,导体2可以是单线、多条线材构成的绞线、被压缩的绞线等任一形态。另外,在由多条线材构成的绞线的情况下,也可以将由两种以上材质构成的线材组合。导体2优选使用例如截面积为0.13mm2的粗细的导体。
绝缘体3至少由作为基础树脂以聚氯乙烯为主成分并含有增塑剂、氯化聚乙烯、MBS树脂的电线被覆材料形成。
绝缘体3的厚度的标准厚度为0.25mm以下。绝缘体3的厚度超过0.25mm时,绝缘体的薄壁化不充分。另外,绝缘体3的厚度超过0.25mm时,绝缘电线1的外径为直径小于1.1mm,因此相对而言导体2过度变细,导电性变得不充分。另外,优选绝缘体3的厚度在0.1mm以上。绝缘体3的厚度小于0.1mm时,难以均匀地形成绝缘体3的覆膜,存在无法充分发挥绝缘性能的危险。
构成绝缘体3的上述增塑剂、氯化聚乙烯以及MBS树脂的混合量处于特定范围内,并且氯化聚乙烯以及MBS树脂的总量处于特定范围内。
作为基础树脂的聚氯乙烯并不特别限定,但从抑制因增塑剂的减量而导致的提高压曲力的效果降低等的角度出发,优选聚合度为800以上。另外,从抑制聚氯乙烯与其他成分的混合性的降低等的角度出发,优选聚氯乙烯的聚合度为2800以下。更优选聚氯乙烯的聚合度为1300~2500的范围内。
相对于100质量份的聚氯乙烯,在10~20质量份的范围内混合增塑剂。增塑剂的混合量小于10质量份时,不仅电线挤出性降低,绝缘外观恶化,还无法满足绝缘电线的挠性。另一方面,增塑剂超过20质量份时,无法满足压曲力,无法可靠地插入端子。
增塑剂优选使用选自邻苯二甲酸酯类增塑剂、偏苯三酸酯类增塑剂、均苯四甲酸酯类增塑剂、脂族酯类增塑剂的任一种或两种以上。通过使用上述增塑剂,能够获得良好的增塑效果。
作为构成邻苯二甲酸酯类增塑剂的醇,可以列举出碳数为8~13的饱和脂族醇等。这些醇可以使用一种或两种以上。邻苯二甲酸酯类增塑剂更具体来说例如可以列举出邻苯二甲酸二乙基己酯、邻苯二甲酸二正辛酯、邻苯二甲酸二异壬酯、邻苯二甲酸二壬酯、邻苯二甲酸二异癸酯、邻苯二甲酸双十三烷酯等。
作为构成偏苯三酸酯类增塑剂以及均苯四甲酸酯类增塑剂的醇,可以列举出碳数为8~13的饱和脂族醇等。这些醇可以使用一种或两种以上。
作为脂族酯类增塑剂,可以列举出己二酸酯、癸二酸酯、壬二酸酯等。作为构成酯的醇,可以列举出碳数为3~13的饱和脂族醇等。这些醇可以使用一种或两种以上。脂族酯类增塑剂例如可以列举出己二酸二辛酯、己二酸二异壬酯、癸二酸二丁酯、癸二酸二辛酯、壬二酸二辛酯等。
作为氯化聚乙烯,可适宜使用含有15~45质量%的范围的氯的氯化聚乙烯。作为氯化聚乙烯,可以使用非结晶性氯化聚乙烯、半结晶性氯化聚乙烯等。它们可以单独使用,也可以并用两种以上。
相对于100质量份的聚氯乙烯,在1~6质量份的范围内混合氯化聚乙烯。在氯化聚乙烯的混合量小于1质量份的情况下,电线挤出性降低,从而绝缘电线的外观恶化。另一方面,在氯化聚乙烯的混合量超过6质量份的情况下,绝缘电线的压曲力降低,无法切实地插入端子。
相对于100质量份的聚氯乙烯,氯化聚乙烯的混合量更优选在2~5质量份的范围内,进而优选在3~4质量份的范围内。
作为MBS类树脂,为在聚丁二烯、苯乙烯-丁二烯类共聚物等橡胶成分中接枝聚合了丙烯酸甲酯、丙烯酸乙酯等丙烯酸单体、苯乙烯类单体等的聚合物,优选使用橡胶成分为20~75质量%的范围的树脂。
相对于100质量份的聚氯乙烯,在1~6质量份的范围内混合MBS类树脂。在MBS类树脂的混合量小于1质量份的情况下,无法满足绝缘电线的挠性。另一方面,在MBS类树脂的混合量超过6质量份的情况下,绝缘电线的压曲力降低,无法可靠地插入端子。相对于100质量份的聚氯乙烯,MBS类树脂的混合量更优选在2~5质量份的范围内,进而优选在3~4质量份的范围内。
本发明的电线被覆材料在包含聚氯乙烯的类中混合氯化聚乙烯以及MBS类树脂双方。在包含聚氯乙烯的类中仅混合氯化聚乙烯或者仅混合MBS类树脂的材料无法全部满足压曲力、挠性、绝缘外观。此时,相对于100质量份的聚氯乙烯,氯化聚乙烯、MBS类树脂的总量在2~7质量份的范围内。在总量小于2质量份的情况下,无法满足绝缘电线的挠性或绝缘外观,或者无法满足双方。另一方面,在总量超过7质量份时,压曲力降低,无法可靠地插入端子。
相对于100质量份的聚氯乙烯,氯化聚乙烯以及MBS类树脂的总量更优选在3~6质量份的范围内,进而优选在4~5质量份的范围内。
在本发明的电线被覆材料中,在不损害本发明的目的的范围内,也可以含有除了聚氯乙烯、增塑剂、氯化聚乙烯、MBS类树脂以外的其他成分。作为其他成分,可以列举出稳定剂、颜料、抗氧化剂、增量剂等通常电线被覆材料中使用的添加剂。
本发明的电线被覆材料例如在作为基础树脂的聚氯乙烯中混合增塑剂、氯化聚乙烯、MBS系数值以及根据需要而添加的各种添加成分,进行加热混炼,从而能够配制出聚氯乙烯组合物。此时,可以使用班伯里密炼机(Banbury mixer)、加压捏炼机、混炼挤压机、双轴挤压机、轧制辊轧机等通常的搅拌机。在进行加热混炼之前,也可以利用滚筒等预先进行干混合。在加热混炼之后,从搅拌机中取出而获得组合物。此时也可以利用造粒机等将该组合物成形为颗粒状。接着,将配制出的电线被覆材料挤出覆盖到导体2的外周,从而获得使用本发明的电线被覆材料作为绝缘体3的绝缘电线1。
在本发明中,绝缘电线除了图1所示的单线以外,还可以形成为未特别图示的扁平线、屏蔽线等的形态。另外,线束也可以利用上述各种形态的绝缘电线形成为公知的各种形态。
本发明的电线可以用于机动车用、设备用、信息通信用、电力用、船舶用、航空器用等各种电线,但尤其适合用于机动车用电线。
实施例
以下表示本发明的实施例、比较例。另外,本发明并不限定于实施例。
实施例1~25、比较例1~14
(电线被覆材料的配制)
如表1~3所示,使聚氯乙烯、增塑剂(A成分)、氯化聚乙烯(B成分)、MBS树脂(C成分)、非铅稳定剂等各成分为表1~3所示的混合量(质量份),利用单轴挤压机在180℃进行混合,利用造粒机成形为颗粒状,配制出聚氯乙烯组合物。
(绝缘电线的制作)
将配制出的聚氯乙烯组合物在截面积为0.13mm2的绞线导体的周围以0.2mm的覆盖厚度挤压成型,从而制作出电线外径D为0.85mm的绝缘电线。对所获得的绝缘电线进行同直径缠绕(self-diameterwinding)、压曲力、电线外观等的特性试验,评价了电线的特性。试验结果如表1~3所示。另外,表1~3的绝缘被覆材料的详情和电线的试验方法如下所述。
(表1~3的绝缘被覆材料的详情)
·聚氯乙烯(聚合度800):新第一塩ビ公司制,商品名“ZEST800Z”
·聚氯乙烯(聚合度1300):新第一塩ビ公司制,商品名“ZEST1300Z”
·聚氯乙烯(聚合度2500):新第一塩ビ公司制,商品名“ZEST2500Z”
·非结晶性氯化聚乙烯:昭和電工公司制,商品名“エラスレン401A”
·半结晶性氯化聚乙烯:昭和電工公司制、商品名“エラスレン404B”
·MBS树脂:三菱レイヨン公司制、商品名“メタブレンC-323A”
·偏苯三酸酯:DIC公司制、商品名“W-700”
·均苯四甲酸酯:DIC公司制、商品名“W-7010”
·邻苯二甲酸酯:ジェイ·プラス公司制、商品名“DUP”
·己二酸酯:DIC公司制、商品名“W-242”
·非铅类稳定剂:ADEKA公司制、商品名“RUP-100”
(评价方法)
(同直径缠绕)
这是评价绝缘电线的挠性的试验。在与电线的外径相同直径的心轴上将绝缘电线卷绕三圈来观察外观。观察外观,在绝缘体上不存在能看见导体的龟裂、破裂的情况下,进行1kV×1分钟的耐电压试验。将外观上没有龟裂、露出并且在耐电压试验中没有破损的产品评价为○(合格),将外观上存在龟裂、破裂或者在耐电压试验中破损的产品评价为×(不合格)。
(压曲力)
在距离绝缘电线的末端10mm的位置上保持电线,以一定的速度(200mm/分)将电线推抵到平板上,测定电线弯曲时的载荷,将该载荷作为压曲力(N)。压曲力的试验是评价将电线插入连接器的端子时的绝缘电线的压曲程度的试验。压曲力的数值越高表示越难以压曲。如果该压曲力(N)为10(N)以上,判断为在将绝缘电线实际插入连接器端子时能够进行良好的作业,评价为○(合格),在压曲力(N)小于10(N)时评价为×(不合格)。
(电线外观)
通过目视来评价所获得的绝缘电线,将绝缘电线表面的平滑性极其优秀、没有问题的产品评价为○(合格),将表面产生结霜状或麻点状的表面粗糙而判断为没有实用性的产品评价为×(不合格)。
[表1]
[表2]
[表3]
比较例1~14的绝缘电线如表3所示,并不具有本发明的电线被覆材料的全部构成要素,因此无法满足上述全部特性。与此相对,如表1及表2所示,实施例1~25具有本发明的电线被覆材料的构成要件,因此可获得满足同直径缠绕、压曲力、电线外观的全部特性的绝缘电线。
Claims (4)
1.一种电线被覆材料,含有聚氯乙烯,其特征在于,
上述电线被覆材料含有100质量份的上述聚氯乙烯、10~20质量份的增塑剂、1~6质量份的氯化聚乙烯、1~6质量份的MBS类树脂,并且上述氯化聚乙烯和上述MBS类树脂的总量为2~7质量份。
2.根据权利要求1所述的电线被覆材料,其特征在于,
上述增塑剂包括选自邻苯二甲酸酯类增塑剂、偏苯三酸酯类增塑剂、均苯四甲酸酯类增塑剂、脂族酯类增塑剂的任一种或两种以上。
3.一种绝缘电线,导体被绝缘体覆盖,电线外径小于1.1mm,其特征在于,
上述绝缘体的厚度为0.25mm以下,上述绝缘体的材料使用上述权利要求1或2所述的电线被覆材料。
4.一种线束,其特征在于,
使用上述权利要求3所述的绝缘电线。
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Also Published As
Publication number | Publication date |
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JP5729143B2 (ja) | 2015-06-03 |
DE112012002304T5 (de) | 2014-03-13 |
WO2012165480A1 (ja) | 2012-12-06 |
CN103597549B (zh) | 2017-03-22 |
US20140060925A1 (en) | 2014-03-06 |
JP2012252869A (ja) | 2012-12-20 |
US9484126B2 (en) | 2016-11-01 |
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