電(dian)熱帶(dai)的(de)電(dian)熱元件是(shi)具有正(zheng)溫度效應的(de)PTC芯帶(dai)，這旨在(zai)兩根(gen)平行金屬導線(xian)之間均勻地包裹一(yi)層橫向流(liu)過PTC材料(liao)層，到達另(ling)一(yi)根(gen)導線(xian)，PTC材料(liao)層就是(shi)并聯在(zai)兩根(gen)導線(xian)之間的(de)電(dian)阻(zu)發熱體，它能將電(dian)能轉(zhuan)化為熱能，對(dui)管(guan)道(dao)等(deng)操(cao)作系統進行了伴熱、保溫。由(you)于電(dian)熱帶(dai)科技含量高，生產難度大，我們可以從以下幾方面對(dui)電(dian)熱帶(dai)的(de)品質進行區分和判斷：

    由于生產(chan)(chan)設(she)備、技術水平、工藝條件(jian)的限制，產(chan)(chan)品(pin)質量也參差不(bu)齊。如果(guo)用戶不(bu)慎使(shi)用了劣質的電(dian)熱(re)帶(dai)，輕(qing)則短路跳閘，重(zhong)(zhong)則會引(yin)發伴熱(re)管線起(qi)火，甚(shen)至燒毀被伴熱(re)設(she)備等重(zhong)(zhong)要部件(jian)。如何鑒別電(dian)熱(re)帶(dai)的優劣，是選(xuan)購帶(dai)電(dian)熱(re)帶(dai)的頭(tou)等大事。

一導電銅絲：

    電熱帶(dai)是一扁形長(chang)帶(dai)，其導(dao)(dao)電線(xian)(xian)優劣也直接關(guan)系到電纜的好(hao)壞，通(tong)常導(dao)(dao)電線(xian)(xian)芯(xin)用鍍(du)錫或鍍(du)鎳銅絲(si)(si)絞合成型，制造時，除要(yao)選擇質量(liang)好(hao)的鍍(du)錫銅絲(si)(si)外(wai)，還必須考慮導(dao)(dao)電線(xian)(xian)芯(xin)表面狀態對電熱帶(dai)產生的影響，在(zai)線(xian)(xian)徑的選擇上也不能偷工減料，為PTC芯(xin)帶(dai)的生產打下基礎。

二.起動電流

    PTC芯帶是電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶的(de)(de)(de)(de)(de)核(he)心(xin)部分，一(yi)般廠(chang)家(jia)(jia)不(bu)易掌握(wo)其核(he)心(xin)技術(shu)，其關(guan)鍵系數就是啟動(dong)電(dian)(dian)(dian)(dian)流大(da)小和衰退率(lv)，起(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)流是指電(dian)(dian)(dian)(dian)伴熱(re)(re)(re)(re)帶接(jie)(jie)通電(dian)(dian)(dian)(dian)源時(shi)，瞬間產生的(de)(de)(de)(de)(de)最大(da)電(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)峰值(zhi)。它對電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶的(de)(de)(de)(de)(de)品(pin)(pin)質有(you)著決定性意(yi)義(yi)，是反映電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶制造(zao)技術(shu)水(shui)平的(de)(de)(de)(de)(de)關(guan)鍵參數。如(ru)果起(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)流較(jiao)大(da)，那(nei)么單一(yi)電(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶使用(yong)長度就會減短(duan)，同時(shi)，每(mei)次起(qi)(qi)動(dong)時(shi)，還會破壞PTC層(ceng)與(yu)導電(dian)(dian)(dian)(dian)線芯的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)接(jie)(jie)觸界(jie)面，縮(suo)短(duan)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶的(de)(de)(de)(de)(de)使用(yong)壽命(ming)，并存在(zai)(zai)很大(da)的(de)(de)(de)(de)(de)安全(quan)隱(yin)患。目前國內(nei)大(da)部分廠(chang)家(jia)(jia)的(de)(de)(de)(de)(de)產品(pin)(pin)起(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)流一(yi)般在(zai)(zai)0.9-1.2A/m左右，美(mei)國瑞(rui)侃公司(si)的(de)(de)(de)(de)(de)產品(pin)(pin)在(zai)(zai)0.5A/m以下(xia)，而我(wo)們安徽環(huan)瑞(rui)電(dian)(dian)(dian)(dian)伴熱(re)(re)(re)(re)生產的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶均控制在(zai)(zai)0.6A/m以下(xia)，接(jie)(jie)近了(le)國際水(shui)平，達到了(le)國內(nei)領先水(shui)平，所以請(qing)廣大(da)用(yong)戶在(zai)(zai)選購(gou)時(shi)，務必弄(nong)清起(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)流這(zhe)個重要的(de)(de)(de)(de)(de)技術(shu)參數，條件允許的(de)(de)(de)(de)(de)情況下(xia)，最好自己測量，盡量選購(gou)起(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)流較(jiao)小的(de)(de)(de)(de)(de)產品(pin)(pin)，以免給公司(si)造(zao)成不(bu)必要的(de)(de)(de)(de)(de)損失(shi)。

三.衰退率

衰退率是指隨著使(shi)用(yong)期的延長電熱帶(dai)的溫度(du)和功率的衰減程(cheng)度(du)，其技術(shu)很難掌握，國外(wai)的衰退率較小，使(shi)用(yong)壽(shou)命可(ke)(ke)達(da)15年(nian)以上，而國內的一般都比較大(da)，使(shi)用(yong)壽(shou)命只有4--5年(nian)，目(mu)前我公(gong)司經多次實驗已達(da)到30公(gong)里(li)一次擠(ji)出成功，工藝(yi)參數(shu)也相對穩定(ding)，最高維(wei)持溫度(du)也在可(ke)(ke)控(kong)范圍，起動電流低于0.6A/m，使(shi)用(yong)壽(shou)命10年(nian)以上，達(da)到了國際水平，國內領先。

四.輻射加工技術

    PTC芯(xin)帶(dai)制成(cheng)后(hou)需要經(jing)過輻(fu)(fu)射交(jiao)(jiao)了(le)(le)聯(lian)(lian)(lian)才能具有(you)最優PTC效應，交(jiao)(jiao)聯(lian)(lian)(lian)的(de)(de)(de)好(hao)壞，決(jue)定(ding)了(le)(le)芯(xin)帶(dai)性(xing)(xing)(xing)(xing)能的(de)(de)(de)穩定(ding)性(xing)(xing)(xing)(xing)及使(shi)(shi)(shi)用壽(shou)(shou)命。目前(qian)，國內較(jiao)為普遍(bian)的(de)(de)(de)是(shi)采用高能電(dian)(dian)(dian)(dian)(dian)子輻(fu)(fu)照(zhao)(zhao)交(jiao)(jiao)聯(lian)(lian)(lian)，按PTC材(cai)料體系來(lai)確定(ding)適宜的(de)(de)(de)輻(fu)(fu)照(zhao)(zhao)劑(ji)量，另外(wai)，劑(ji)量率不宜過大(da)(da)(da)(da)，輻(fu)(fu)射時(shi)線速度也(ye)宜均勻，并控制好(hao)運行的(de)(de)(de)張力和(he)摩擦力。在輻(fu)(fu)照(zhao)(zhao)交(jiao)(jiao)聯(lian)(lian)(lian)環(huan)節中(zhong)，國內部分并未經(jing)過輻(fu)(fu)射交(jiao)(jiao)聯(lian)(lian)(lian)，這樣(yang)看似(si)廠家為用戶節約(yue)成(cheng)本，誰知(zhi)這其(qi)中(zhong)存(cun)在很大(da)(da)(da)(da)的(de)(de)(de)安(an)(an)全隱患(huan)。未經(jing)輻(fu)(fu)照(zhao)(zhao)交(jiao)(jiao)聯(lian)(lian)(lian)的(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)層(ceng)就耐(nai)熱(re)(re)(re)(re)性(xing)(xing)(xing)(xing)和(he)抗(kang)老化(hua)(hua)性(xing)(xing)(xing)(xing)很差，時(shi)間一(yi)長(chang)容易出(chu)現漏(lou)電(dian)(dian)(dian)(dian)(dian)、短路(lu)、破(po)壞PTC芯(xin)帶(dai)的(de)(de)(de)性(xing)(xing)(xing)(xing)能，大(da)(da)(da)(da)大(da)(da)(da)(da)縮(suo)(suo)短了(le)(le)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)的(de)(de)(de)使(shi)(shi)(shi)用壽(shou)(shou)命。而(er)(er)我(wo)(wo)公司推出(chu)的(de)(de)(de)安(an)(an)徽環(huan)瑞電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)，是(shi)經(jing)過輻(fu)(fu)照(zhao)(zhao)交(jiao)(jiao)聯(lian)(lian)(lian)，有(you)較(jiao)好(hao)的(de)(de)(de)耐(nai)熱(re)(re)(re)(re)性(xing)(xing)(xing)(xing)和(he)抗(kang)老化(hua)(hua)性(xing)(xing)(xing)(xing)。在使(shi)(shi)(shi)用過程中(zhong)，不僅延(yan)長(chang)了(le)(le)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)的(de)(de)(de)使(shi)(shi)(shi)用壽(shou)(shou)命，還提高了(le)(le)它的(de)(de)(de)安(an)(an)全性(xing)(xing)(xing)(xing)。那(nei)么，如何區分電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)的(de)(de)(de)輻(fu)(fu)照(zhao)(zhao)程度呢？首(shou)先我(wo)(wo)們可(ke)以(yi)從電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)的(de)(de)(de)柔軟性(xing)(xing)(xing)(xing)來(lai)觀(guan)察一(yi)般(ban)情(qing)況。經(jing)整(zheng)(zheng)體輻(fu)(fu)射的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)較(jiao)柔軟，而(er)(er)只輻(fu)(fu)射芯(xin)帶(dai)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)柔軟性(xing)(xing)(xing)(xing)差，不易彎曲。其(qi)次，也(ye)可(ke)以(yi)從電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)的(de)(de)(de)噴碼(ma)(ma)區分。整(zheng)(zheng)體輻(fu)(fu)照(zhao)(zhao)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)由(you)于(yu)(yu)高能電(dian)(dian)(dian)(dian)(dian)子束照(zhao)(zhao)射，噴碼(ma)(ma)顏(yan)色較(jiao)暗淡，而(er)(er)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)絕(jue)(jue)緣(yuan)(yuan)層(ceng)未經(jing)輻(fu)(fu)射射擊的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)纜，其(qi)噴碼(ma)(ma)顏(yan)色較(jiao)鮮艷(yan)，另外(wai)整(zheng)(zheng)體輻(fu)(fu)射的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)其(qi)絕(jue)(jue)緣(yuan)(yuan)層(ceng)中(zhong)甚至可(ke)以(yi)來(lai)回抽動(dong)，同時(shi)，這樣(yang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)帶(dai)通電(dian)(dian)(dian)(dian)(dian)發熱(re)(re)(re)(re)時(shi)，未經(jing)輻(fu)(fu)照(zhao)(zhao)的(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)層(ceng)收縮(suo)(suo)性(xing)(xing)(xing)(xing)較(jiao)大(da)(da)(da)(da)，由(you)于(yu)(yu)絕(jue)(jue)緣(yuan)(yuan)層(ceng)的(de)(de)(de)后(hou)縮(suo)(suo)，使(shi)(shi)(shi)半(ban)導體PTC芯(xin)帶(dai)曝露出(chu)來(lai)，這樣(yang)很容易出(chu)現漏(lou)電(dian)(dian)(dian)(dian)(dian)、短路(lu)，存(cun)在很大(da)(da)(da)(da)的(de)(de)(de)安(an)(an)全隱患(huan)。