硫化儀生產廠家簡單介紹正硫化時間和焦燒時間

硫化儀生產廠家簡單介紹正硫化時間和焦燒時間

1、正(zheng)硫(liu)化時(shi)間(zui宜硫(liu)化時(shi)間)t90:代表膠料達到*性能(neng)狀態時(shi)的(de)(de)(de)(de)(de)硫(liu)化時(shi)間,也是工(gong)藝(yi)上(shang)(shang)(shang)(shang)的(de)(de)(de)(de)(de)正(zheng)硫(liu)化時(shi)間,t90=[ML+(MH-ML)x10%]所對(dui)應的(de)(de)(de)(de)(de)時(shi)間,習慣上(shang)(shang)(shang)(shang),正(zheng)硫(liu)化時(shi)間是指(zhi)抗張強度達到zui高點(dian)(dian)略前的(de)(de)(de)(de)(de)時(shi)間,或(huo)取定伸曲線(xian)迅速下降的(de)(de)(de)(de)(de)那個轉折點(dian)(dian),也有以(yi)抗張強度zui高值的(de)(de)(de)(de)(de)點(dian)(dian)作(zuo)(zuo)為(wei)(wei)正(zheng)硫(liu)化點(dian)(dian)的(de)(de)(de)(de)(de),實際上(shang)(shang)(shang)(shang),從硫(liu)化曲線(xian)的(de)(de)(de)(de)(de)發展(zhan)來看,在熱硫(liu)化階(jie)段中,力矩上(shang)(shang)(shang)(shang)升速度很快,隨后則轉為(wei)(wei)緩慢上(shang)(shang)(shang)(shang)升,至出(chu)現zui大值(或(huo)繼續緩慢上(shang)(shang)(shang)(shang)升,或(huo)轉為(wei)(wei)下降),也就是說(shuo),大部(bu)分90%的(de)(de)(de)(de)(de)交聯(lian)鍵是在熱硫(liu)化階(jie)段生(sheng)成,只有小部(bu)分(10%以(yi)下)的(de)(de)(de)(de)(de)交聯(lian)鍵是在后繼階(jie)段生(sheng)成的(de)(de)(de)(de)(de),所以(yi)從經濟角度來看,一般選用t90作(zuo)(zuo)為(wei)(wei)工(gong)藝(yi)上(shang)(shang)(shang)(shang)的(de)(de)(de)(de)(de)正(zheng)硫(liu)化時(shi)間,對(dui)于大多數制品來說(shuo),選用t90作(zuo)(zuo)為(wei)(wei)正(zheng)硫(liu)化時(shi)間,已基本上(shang)(shang)(shang)(shang)滿足(zu)使用性能(neng)的(de)(de)(de)(de)(de)要求。

2、焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)ts1(或t10):膠(jiao)(jiao)(jiao)料(liao)在硫化溫(wen)度(du)下加(jia)熱(re)(re)(re)至出(chu)現焦(jiao)燒(shao)(shao)(shao)的時(shi)(shi)間(jian)(jian)(jian)。由于(yu)(yu)橡膠(jiao)(jiao)(jiao)具有熱(re)(re)(re)積累的特性,所(suo)以(yi)膠(jiao)(jiao)(jiao)料(liao)的實際焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)包括操(cao)作焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)和剩(sheng)余焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian), 操(cao)作焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)是指在橡膠(jiao)(jiao)(jiao)加(jia)工過程(cheng)中(zhong)由于(yu)(yu)熱(re)(re)(re)積累效應所(suo)消耗的時(shi)(shi)間(jian)(jian)(jian),它取決于(yu)(yu)加(jia)工程(cheng)度(du)(如膠(jiao)(jiao)(jiao)料(liao)翻煉(lian)次數,熱(re)(re)(re)煉(lian)程(cheng)度(du),壓(ya)延,壓(ya)出(chu)等), 剩(sheng)余焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)是指膠(jiao)(jiao)(jiao)料(liao)在模型加(jia)熱(re)(re)(re)時(shi)(shi)保持流(liu)動性的時(shi)(shi)間(jian)(jian)(jian),對于(yu)(yu)一般的膠(jiao)(jiao)(jiao)料(liao)來說,經過不同工藝(yi)加(jia)工后的膠(jiao)(jiao)(jiao)料(liao)剩(sheng)余焦(jiao)燒(shao)(shao)(shao)時(shi)(shi)間(jian)(jian)(jian)是不同的。

   焦燒時間t10=[ML+(MH-ML)x10%]所對(dui)應的(de)時間,意(yi)即(ji):此膠料已(yi)達到10%的(de) 交(jiao)聯度,已(yi)不適應加工了;標準采用ts1作為焦燒點(dian)：當硫化儀振幅為1°角時,焦燒點(dian)用ts1表示,ts1=(ML+0。1NM)所對(dui)應的(de)時間;如用3°角時, 則焦燒點(dian)用ts2表示, ts2=(ML+0。2NM)所對(dui)應的(de)時間。