铜(Tong)包(Bao)铜(Tong)线(Xian)（(?)电(Dian)线(Xian)电(Dian)缆(Lan)）(?)是(Shi)裸(Luo)铜(Tong)丝(Si)、(?)镀(Du)锡(Xi)铜(Tong)丝(Si)等(Deng)的(De)一(Yi)种(Zhong)新(Xin)型(Xing)替(Ti)代(Dai)材(Cai)料(Liao)。(?)具(Ju)有(You)重(Zhong)量(Liang)轻(Qing)、(?)强(Qiang)度(Du)高(Gao)、(?)耐(Nai)腐(Fu)蚀(Shi)、(?)价(Jia)格(Ge)便(Bian)宜(Yi)等(Deng)特(Te)点(Dian)，(?)可(Ke)用(Yong)做(Zuo)通(Tong)信(Xin)线(Xian)缆(Lan)、(?)信(Xin)号(Hao)线(Xian)缆(Lan)、(?)屏(Ping)蔽(Bi)线(Xian)缆(Lan)理(Li)想(Xiang)的(De)导(Dao)体(Ti)和(He)屏(Ping)蔽(Bi)材(Cai)料(Liao)，(?)同(Tong)轴(Zhou)电(Dian)缆(Lan)和(He)数(Shu)据(Ju)传(Chuan)送(Song)电(Dian)缆(Lan)不(Bu)影(Ying)响(Xiang)测(Ce)试(Shi)数(Shu)据(Ju)。(?)

铜(Tong)包(Bao)铜(Tong)线(Xian)特(Te)点(Dian)：(?)

1．(?)导(Dao)电(Dian)率(Lu)约(Yue)为(Wei)25%~27%，(?)直(Zhi)流(Liu)电(Dian)阻(Zu)率(Lu)约(Yue)为(Wei)无(Wu)氧(Yang)铜(Tong)的(De)四(Si)倍(Bei)，(?)但(Dan)根(Gen)据(Ju)电(Dian)线(Xian)电(Dian)缆(Lan)“趋(Qu)肤(Fu)效(Xiao)应(Ying)”计(Ji)算(Suan)，(?)在(Zai)5MHz以(Yi)上(Shang)高(Gao)频(Pin)时(Shi)，(?)电(Dian)阻(Zu)率(Lu)与(Yu)纯(Chun)铜(Tong)线(Xian)相(Xiang)当(Dang)；(?)

2．(?)比(Bi)重(Zhong)为(Wei)8.4，(?)在(Zai)线(Xian)径(Jing)、(?)重(Zhong)量(Liang)相(Xiang)等(Deng)的(De)情(Qing)况(Kuang)下(Xia)，(?)其(Qi)长(Chang)度(Du)比(Bi)纯(Chun)铜(Tong)线(Xian)多(Duo)出(Chu)5% .

3、(?)抗(Kang)拉(La)强(Qiang)度(Du)比(Bi)同(Tong)类(Lei)高(Gao)1/4，(?)有(You)效(Xiao)解(Jie)决(Jue)生(Sheng)产(Chan)过(Guo)程(Cheng)断(Duan)线(Xian)问(Wen)题(Ti)，(?)进(Jin)一(Yi)步(Bu)提(Ti)高(Gao)生(Sheng)产(Chan)效(Xiao)率(Lu)，(?)起(Qi)到(Dao)降(Jiang)低(Di)生(Sheng)产(Chan)成(Cheng)本(Ben)的(De)作(Zuo)用(Yong)。(?)

4、(?)铜(Tong)包(Bao)铜(Tong)由(You)于(Yu)其(Qi)表(Biao)面(Mian)同(Tong)心(Xin)的(De)包(Bao)覆(Fu)了(Liao)一(Yi)层(Ceng)纯(Chun)铜(Tong)，(?)因(Yin)此(Ci)具(Ju)有(You)跟(Gen)纯(Chun)铜(Tong)线(Xian)一(Yi)样(Yang)的(De)易(Yi)焊(Han)性(Xing)。(?)

铜(Tong)包(Bao)铜(Tong)线(Xian)的(De)产(Chan)生(Sheng)：(?)随(Sui)着(Zhuo)铜(Tong)丝(Si)价(Jia)格(Ge)的(De)越(Yue)来(Lai)越(Yue)高(Gao)，(?)电(Dian)线(Xian)行(Xing)业(Ye)不(Bu)法(Fa)商(Shang)家(Jia)开(Kai)始(Shi)寻(Xun)思(Si)用(Yong)廉(Lian)价(Jia)导(Dao)体(Ti)代(Dai)替(Ti)铜(Tong)丝(Si)做(Zuo)为(Wei)电(Dian)线(Xian)电(Dian)缆(Lan)导(Dao)体(Ti)，(?)在(Zai)这(Zhe)种(Zhong)不(Bu)好(Hao)的(De)风(Feng)气(Qi)下(Xia)铜(Tong)包(Bao)铝(Lu)，(?)铜(Tong)包(Bao)钢(Gang)，(?)铜(Tong)包(Bao)铜(Tong)等(Deng)产(Chan)品(Pin)诞(Dan)生(Sheng)，(?)它(Ta)的(De)诞(Dan)生(Sheng)给(Gei)电(Dian)线(Xian)电(Dian)缆(Lan)行(Xing)业(Ye)蒙(Meng)上(Shang)了(Liao)一(Yi)层(Ceng)乌(Wu)云(Yun)，(?)其(Qi)中(Zhong)铜(Tong)包(Bao)铜(Tong)最(Zui)不(Bu)被(Bei)大(Da)家(Jia)认(Ren)同(Tong)也(Ye)，(?)最(Zui)不(Bu)好(Hao)辨(Bian)别(Bie)。(?)

铜(Tong)包(Bao)铜(Tong)线(Xian)多(Duo)用(Yong)于(Yu)电(Dian)线(Xian)电(Dian)缆(Lan)的(De)导(Dao)体(Ti)，(?)就(Jiu)是(Shi)指(Zhi)在(Zai)用(Yong)黄(Huang)铜(Tong)制(Zhi)成(Cheng)的(De)导(Dao)线(Xian)外(Wai)面(Mian)包(Bao)上(Shang)一(Yi)层(Ceng)紫(Zi)铜(Tong)。(?)紫(Zi)铜(Tong)也(Ye)就(Jiu)是(Shi)无(Wu)氧(Yang)铜(Tong)，(?)电(Dian)阻(Zu)符(Fu)合(He)国(Guo)家(Jia)标(Biao)准(Zhun)。(?)黄(Huang)铜(Tong)二(?)次(Ci)回(Hui)炉(Lu)的(De)铜(Tong)丝(Si)含(Han)较(Jiao)多(Duo)杂(Za)质(Zhi)，(?)各(Ge)电(Dian)性(Xing)能(Neng)也(Ye)远(Yuan)远(Yuan)比(Bi)紫(Zi)铜(Tong)差(Cha)。(?)但(Dan)是(Shi)就(Jiu)因(Yin)为(Wei)紫(Zi)铜(Tong)的(De)成(Cheng)本(Ben)比(Bi)黄(Huang)铜(Tong)每(Mei)吨(Dun)高(Gao)4000多(Duo)元(Yuan)，(?)所(Suo)以(Yi)一(Yi)些(Xie)黑(Hei)心(Xin)厂(Chang)家(Jia)就(Jiu)生(Sheng)产(Chan)紫(Zi)铜(Tong)包(Bao)黄(Huang)铜(Tong)的(De)电(Dian)线(Xian)，(?)降(Jiang)低(Di)成(Cheng)本(Ben)，(?)从(Cong)中(Zhong)牟(Mou)取(Qu)暴(Bao)利(Li)。(?)