透明(ming)硅(gui)膠密(mi)封圈(quan)正常放個(ge)幾年也不(bu)會(hui)發(fa)(fa)黃(huang)，但是有時候在生(sheng)產(chan)中(zhong)，一(yi)些剛出(chu)爐(lu)的(de)(de)(de)透明(ming)的(de)(de)(de)硅(gui)膠密(mi)封圈(quan)看起來黃(huang)黃(huang)的(de)(de)(de)，好像變了(le)顏色(se)。透明(ming)硅(gui)膠密(mi)封圈(quan)為什么會(hui)發(fa)(fa)黃(huang)？　　一(yi)、硫(liu)(liu)化(hua)劑(ji)方面　　硫(liu)(liu)化(hua)劑(ji)性能有分(fen)為普通型(xing)和抗(kang)黃(huang)性.　　1.普通型(xing)不(bu)抗(kang)黃(huang)硫(liu)(liu)化(hua)劑(ji)，應(ying)用(yong)于一(yi)些可用(yong)于顏色(se)比較深或(huo)對顏色(se)要求不(bu)高(gao)的(de)(de)(de)非外(wai)露(lu)硅(gui)膠密(mi)封圈(quan).　　2.抗(kang)黃(huang)性硫(liu)(liu)化(hua)劑(ji)應(ying)用(yong)于需要外(wai)露(lu)、顏色(se)較淺較鮮艷，且對顏色(se)要求較高(gao)的(de)(de)(de)產(chan)品(pin).　　二、工(gong)藝(yi)方面　　透明(ming)硅(gui)膠密(mi)封圈(quan)在成

O型圈(quan)密封(feng)(feng)(feng)圈(quan)是(shi)較(jiao)為常見的(de)一種橡(xiang)(xiang)(xiang)膠(jiao)(jiao)密封(feng)(feng)(feng)圈(quan)，都說橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)密封(feng)(feng)(feng)圈(quan)具有很(hen)好的(de)耐高(gao)溫(wen)性(xing)能，那(nei)么究竟是(shi)多好？下面就(jiu)看看常用橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)材料溫(wen)度(du)(du)范圍。丁腈(jing)橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)密封(feng)(feng)(feng)圈(quan)：零(ling)(ling)下30度(du)(du)到120度(du)(du)，適(shi)合介(jie)質礦(kuang)物(wu)油、汽(qi)油、苯；氯丁橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)密封(feng)(feng)(feng)圈(quan)：零(ling)(ling)下40度(du)(du)到120度(du)(du)，適(shi)合空(kong)氣(qi)、水、氧(yang)；丁基橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)密封(feng)(feng)(feng)圈(quan)：零(ling)(ling)下30度(du)(du)到110度(du)(du)，適(shi)合動、植(zhi)物(wu)油、弱酸、堿；丁苯橡(xiang)(xiang)(xiang)膠(jiao)(jiao)O型圈(quan)密封(feng)(feng)(feng)圈(quan)：零(ling)(ling)下30度(du)(du)到100度(du)(du)，適(shi)合堿、動、植(zhi)物(wu)油

O型(xing)(xing)圈是(shi)在(zai)所(suo)有密(mi)(mi)封(feng)(feng)(feng)產(chan)(chan)(chan)品中(zhong)應(ying)用(yong)(yong)最廣(guang)的(de)(de)(de)一種，生產(chan)(chan)(chan)工藝也(ye)比較(jiao)簡單(dan)，應(ying)用(yong)(yong)的(de)(de)(de)材(cai)質(zhi)較(jiao)多。O型(xing)(xing)密(mi)(mi)封(feng)(feng)(feng)圈是(shi)典型(xing)(xing)的(de)(de)(de)靠擠壓(ya)(ya)發(fa)生形變而(er)產(chan)(chan)(chan)生的(de)(de)(de)密(mi)(mi)封(feng)(feng)(feng)效果，安裝時(shi)與密(mi)(mi)封(feng)(feng)(feng)面產(chan)(chan)(chan)生接(jie)觸壓(ya)(ya)力(li)(li)，當壓(ya)(ya)力(li)(li)大于密(mi)(mi)封(feng)(feng)(feng)介(jie)質(zhi)的(de)(de)(de)壓(ya)(ya)力(li)(li)時(shi)產(chan)(chan)(chan)生密(mi)(mi)封(feng)(feng)(feng)效果，小于時(shi)就(jiu)會(hui)發(fa)生泄漏。在(zai)產(chan)(chan)(chan)品多次試驗中(zhong)發(fa)現，O型(xing)(xing)密(mi)(mi)封(feng)(feng)(feng)圈的(de)(de)(de)損(sun)壞的(de)(de)(de)大部分(fen)原(yuan)因(yin)(yin)，并不是(shi)來(lai)自于O型(xing)(xing)圈的(de)(de)(de)設計(ji)或者是(shi)壓(ya)(ya)力(li)(li)，良好的(de)(de)(de)設計(ji)如(ru)果只是(shi)單(dan)方面的(de)(de)(de)增大壓(ya)(ya)力(li)(li)，并不會(hui)造成O型(xing)(xing)密(mi)(mi)封(feng)(feng)(feng)圈的(de)(de)(de)損(sun)壞，根本的(de)(de)(de)原(yuan)因(yin)(yin)是(shi)由(you)于工作環境的(de)(de)(de)高(gao)溫高(gao)壓(ya)(ya)

O型(xing)(xing)(xing)(xing)密(mi)(mi)(mi)(mi)封圈(quan)(quan)(quan)是(shi)一種截面為(wei)圓形的(de)(de)橡膠密(mi)(mi)(mi)(mi)封圈(quan)(quan)(quan)，因其截面為(wei)O型(xing)(xing)(xing)(xing)，所以稱為(wei)O型(xing)(xing)(xing)(xing)密(mi)(mi)(mi)(mi)封圈(quan)(quan)(quan)，也叫O型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)，開始出現在19世紀(ji)中葉(xie)，當時用(yong)(yong)它作蒸汽機汽缸的(de)(de)密(mi)(mi)(mi)(mi)封元件(jian)。常見的(de)(de)O型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)有：孔(kong)用(yong)(yong)YX型(xing)(xing)(xing)(xing)O型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)、YX型(xing)(xing)(xing)(xing)孔(kong)用(yong)(yong)擋(dang)O型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)、軸用(yong)(yong)YX型(xing)(xing)(xing)(xing)O型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)應用(yong)(yong)介(jie)紹(shao)：1、孔(kong)用(yong)(yong)YX型(xing)(xing)(xing)(xing)O密(mi)(mi)(mi)(mi)封型(xing)(xing)(xing)(xing)圈(quan)(quan)(quan)產品(pin)用(yong)(yong)途：用(yong)(yong)于往復(fu)運(yun)動液壓(ya)油缸中活塞的(de)(de)密(mi)(mi)(mi)(mi)封。適用(yong)(yong)范(fan)圍：TPU：一般(ban)液壓(ya)缸、通(tong)用(yong)(yong)設備液壓(ya)缸。CPU：工程機械(xie)用(yong)(yong)液壓(ya)缸及高溫、高壓(ya)用(yong)(yong)油缸。材質：聚氨酯TPU