CN111372337A - 一种导电发热膜及其制备方法 - Google Patents
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Abstract
本发明涉及一种导电发热膜及其制备方法,其中,导电发热膜包括电极层以及由粒料熔融压膜成型的电阻膜层,所述电极层连接电阻膜层,而所述电阻膜层的原料包括热塑性机体、碳系导电填充物、助剂。本发明通过将热塑性高分子材料作为基体,来提高导电发热膜的结构稳定性、加工性和耐老化性;通过添加碳系导电填充物,来保证导电发热膜的导电性;通过添加助剂,来提高热塑性机体与碳系导电填充物界面的粘结性,从而提高导电发热膜整体的力学性能,从而提高导电发热膜的发热性能和使用寿命。
Description
技术领域
本发明涉及发热膜技术领域,具体涉及一种导电发热膜及其制备方法。
背景技术
目前市场上的导电发热膜一般通过喷涂或逗号刀涂覆工艺将导电聚合材料(如导电银浆或导电油墨)均匀地涂覆到基板上,再与电极复合在一起。由此生产得到的导电发热膜中,存在导电涂层不均匀的问题,并且导电涂层容易掉。因此,为了保护导电涂层以及防止银迁移,在导电涂层外增设一保护层。但该保护层的设置导致导电发热膜生产工艺复杂、成本高。而且在生产过程中,基板的翻折会导致基板上的导电银浆或导电油墨断开,从而影响了导电发热膜的性能及使用寿命。
也就是说,目前的导电发热膜存在使用寿命短、发热性能差,以及生产工艺复杂、生产成本高的问题。
发明内容
针对现有技术存在的问题,本发明的目的在于提供一种导电发热膜及其制备方法,其发热性能好、使用寿命长。
为实现上述目的,本发明采用的技术方案是:
一种导电发热膜,其包括电极层以及由粒料熔融压膜成型的电阻膜层,所述电极层连接电阻膜层,而所述电阻膜层的原料包括热塑性机体、碳系导电填充物和助剂。
所述热塑性基体为100份,碳系导电填充物为20-80份,助剂为6-13份。
所述热塑性机体为聚丙烯、聚氯乙烯、聚苯乙烯、聚甲醛,聚碳酸酯,聚酰胺、丙烯酸类塑料、乙烯-辛稀共聚物、聚砜、聚苯中任意一种。
所述碳系导电填充物为导电炭黑、乙炔黑、炉法炭黑、热裂解炭黑、槽法炭黑、石墨烯、碳纳米管、碳纤维及其衍生物中的一种或多种构成。
所述助剂包括相容剂、偶联剂和抗氧剂。
所述电阻膜层的原料还包括远红外陶瓷粉。
所述远红外陶瓷粉为5-20份,其目数大于200目。
所述电阻膜层的原料还包括3-20份的芳纶纤维或聚亚酰胺纤维。
一种导电发热膜的制备方法,其包括以下步骤:
步骤1、将热塑性基体、碳系导电填充物、助剂混合,形成混合物;
步骤2、将步骤1得到的混合物进行造粒,得到粒料;
步骤3、将步骤2得到的粒料进行熔融压膜形成电阻膜层;
步骤4、在电阻膜层上覆上电极层,即可制备得到导电发热膜。
所述步骤1中,混合物还添加有远红外陶瓷粉。
所述步骤1中,混合物还添加有芳纶纤维或聚亚酰胺纤维。
采用上述方案后,本发明通过将热塑性高分子材料作为基体,来提高导电发热膜的结构稳定性、加工性和耐老化性;通过添加碳系导电填充物,来保证导电发热膜的导电性;通过添加助剂,来提高热塑性机体与碳系导电填充物界面的粘结性,从而提高导电发热膜整体的力学性能,从而提高导电发热膜的发热性能和使用寿命。同时,免去保护层的设置,可以简化生产工艺、提高生产效率,降低生产成本。
此外,本发明通过添加远红外陶瓷粉可以使导电发热膜具有保健理疗功能,增加热辐射。
具体实施方式
本发明揭示了一种导电发热膜,其包括电极层以及由粒料熔融压膜成型的电阻膜层,电极层连接电阻膜层,而电阻膜层的原料包括热塑性机体、碳系导电填充物、助剂。
其中,热塑性基体为100份。热塑性基体可以是聚丙烯、聚氯乙烯、聚苯乙烯、聚甲醛,聚碳酸酯,聚酰胺、丙烯酸类塑料、乙烯-辛稀共聚物、聚砜、聚苯中任意一种。
碳系导电填充物添加量可以调节其电阻大小和屏蔽性能,本发明中碳系导电填充物为20-80份。其可以采用导电炭黑、乙炔黑、炉法炭黑、热裂解炭黑、槽法炭黑、石墨烯、碳纳米管、碳纤维及其衍生物中的一种或多种构成,当采用多种材料复配形成碳系导电填充物时,各材料之间的配比没有特别限定,只要其总和在20-80份的范围内即可。且采用多种材料复配形成碳系导电填充物可以提高其导电和导热网络,从而碳系导电填充物的电热转换效率。
助剂包括相容剂、偶联剂、抗氧剂。其中,相容剂5-12份,其可以是PE-g-ST、PP-g-ST、ABS-g-MAH、PE-g-MAH、PP-g-MAH、POE-g-MAH等。偶联剂为0.5-2份,以钛酸酯偶联剂效果最佳。抗氧剂为0.1-0.5份,常用的有:抗氧剂1010、抗氧剂168、抗氧剂1076、抗氧剂164、抗氧剂264等。
上述电阻膜层的原料还包括远红外陶瓷粉,远红外陶瓷粉为5-20份,其目数大于200目。远红外陶瓷红外辐射率高,能够辐射出比正常物体更多的远红外线。添加远红外陶瓷微珠可以使导电发热膜具有保健理疗功能,增加热辐射。当添加远红外陶瓷粉时,该导电发热膜可以用于可加热眼罩,可加热护膝/马甲/护肩中,提高其保健功效。
为了增强导电加热膜的可拉伸强度,上述电阻膜层的原料还可以包括3-20份的芳纶纤维或聚亚酰胺纤维。
基于同一发明构思,本发明还揭示了一种导电发热膜的制备方法,其包括以下步骤:
步骤1、将热塑性机体和碳系导电填充物、助剂混合,形成混合物;
步骤2、将步骤1得到的混合物进行造粒,得到粒料;
步骤3、将步骤2得到的粒料进行熔融压膜形成电阻膜层;
步骤4、在电阻膜层上以电镀或丝网印刷等方式覆上电极层,即可制备得到导电发热膜。
步骤1中,混合物中还可以添加远红外陶瓷粉,使导电发热膜能够产生较多的远红外线,使导电发热膜具备保健理疗功能。
步骤1中,混合物中还可以添加芳纶纤维或聚亚酰胺纤维,以提高导电加热膜的拉伸性强度。
本发明通过将热塑性高分子材料作为基体,来提高导电发热膜的结构稳定性、加工性和耐老化性;通过添加碳系导电填充物,来保证导电发热膜的导电性;通过添加助剂,来提高热塑性机体与碳系导电填充物界面的粘结性,从而提高导电发热膜整体的力学性能,从而提高导电发热膜的发热性能和使用寿命。同时,免去保护层的设置,可以简化生产工艺、提高生产效率,降低生产成本。
此外,本发明通过添加远红外陶瓷粉可以使导电发热膜具有保健理疗功能,增加热辐射。
当本发明导电发热膜通电后,导电发热膜中的碳分子产生布朗运动,碳分子之间发生剧烈的摩擦和撞击,产生的热能以热辐射、热对流和热传导的方式共同作用以最大的转换效率将热量传递出去。
红外线的辐射起源于分子的振动和转动,而分子的转动和振动起源于温度。所以,当导电发热膜发热是能够激发远红外陶瓷粉发出远红外线,远红外线作用于人体而起到保健理疗的功效。
为详尽本发明内容,以下将采用上述制备方法制备导电发热膜,并进行相应性能的测试,具体如下。
表1
表1中的材料按照上述制备方法制备得到电阻膜层,将电阻膜层连接电极层后即可得到导电发热膜。与现有的导电加热膜相比,五个实施例得到的导电加热膜层发热性能和耐拉伸性能均得到有效提高,也具有更好的理疗保健功能。
以上所述,仅是本发明实施例而已,并非对本发明的技术范围作任何限制,故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (11)
1.一种导电发热膜,其特征在于:包括电极层以及由粒料熔融压膜成型的电阻膜层,所述电极层连接电阻膜层,而所述电阻膜层的原料包括热塑性机体、碳系导电填充物、助剂。
2.根据权利要求1所述的一种导电发热膜,其特征在于:所述热塑性基体为100份,碳系导电填充物为20-80份,助剂为6-13份。
3.根据权利要求1所述的一种导电发热膜,其特征在于:所述热塑性机体为聚丙烯、聚氯乙烯、聚苯乙烯、聚甲醛,聚碳酸酯,聚酰胺、丙烯酸类塑料、乙烯-辛稀共聚物、聚砜、聚苯中任意一种。
4.根据权利要求1所述的一种导电发热膜,其特征在于:所述碳系导电填充物为导电炭黑、乙炔黑、炉法炭黑、热裂解炭黑、槽法炭黑、石墨烯、碳纳米管、碳纤维及其衍生物中的一种或多种构成。
5.根据权利要求1所述的一种导电发热膜,其特征在于:所述助剂包括相容剂、偶联剂和抗氧剂;所述相容剂为5-12份,所述偶联剂为0.5-2份,所述抗氧剂为0.1-0.5份。
6.根据权利要求1所述的一种导电发热膜,其特征在于:所述电阻膜层的原料还包括远红外陶瓷粉。
7.根据权利要求1所述的一种导电发热膜,其特征在于:所述远红外陶瓷粉为5-20份,其目数大于200目。
8.根据权利要求1所述的一种导电发热膜,其特征在于:所述电阻膜层的原料还包括3-20份的芳纶纤维或聚亚酰胺纤维。
9.一种导电发热膜的制备方法,其特征在于:其包括以下步骤:
步骤1、将热塑性基体、碳系导电填充物、远红外陶瓷粉、芳纶纤维或聚亚酰胺纤维助剂混合,形成混合物;
步骤2、将步骤1得到的混合物进行造粒,得到粒料;
步骤3、将步骤2得到的粒料进行熔融压膜形成电阻膜层;
步骤4、在电阻膜层上覆上电极层,即可制备得到导电发热膜。
10.根据权利要求10所述的一种导电发热膜的制备方法,其特征在于:所述步骤1中,混合物还添加有远红外陶瓷粉。
11.根据权利要求10所述的一种导电发热膜的制备方法,其特征在于:所述步骤1中,混合物还添加有芳纶纤维或聚亚酰胺纤维。
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