1. 生產PEX管(guan)的(de)主(zhu)要原料是HDPE以(yi)(yi)及(ji)引發(fa)劑(ji)(ji)(ji)(ji)、交聯(lian)(lian)(lian)劑(ji)(ji)(ji)(ji)、催(cui)化(hua)劑(ji)(ji)(ji)(ji)等助(zhu)劑(ji)(ji)(ji)(ji)，如(ru)有(you)特(te)殊要求(qiu)還可以(yi)(yi)添加其他改質(zhi)劑(ji)(ji)(ji)(ji)。PEX管(guan)采用(yong)(yong)世(shi)界上先進的(de)一步法（MONSOIL法）技(ji)術制造，采用(yong)(yong)普(pu)通(tong)聚乙烯原料加入硅烷接枝料，在(zai)聚合物大分子鏈間形(xing)成化(hua)學共價(jia)鍵以(yi)(yi)取(qu)代原有(you)的(de)范德華力，從而形(xing)成三(san)維交鏈網狀(zhuang)結構(gou)(gou)的(de)交聯(lian)(lian)(lian)聚乙烯，其交聯(lian)(lian)(lian)度可達(da)60％～89％，使其具有(you)優良的(de)理化(hua)性能。PEX 管(guan)交聯(lian)(lian)(lian)劑(ji)(ji)(ji)(ji)（添加劑(ji)(ji)(ji)(ji)）是對其原線(xian)型(xing)分子結構(gou)(gou)起裂解作用(yong)(yong)形(xing)成接枝料，進而形(xing)成三(san)維網狀(zhuang)結構(gou)(gou)。抗氧劑(ji)(ji)(ji)(ji)及(ji)色粒的(de)作用(yong)(yong)是提(ti)高PEX管(guan)的(de)耐腐性，防(fang)止日光長期照(zhao)射發(fa)生物性變化(hua)，能夠抵御(yu)紫外線(xian)的(de)長期侵蝕，從而延長其使用(yong)(yong)壽命。
2. PEX管(guan)的(de)性能和特點。
①. PEX管與鍍鋅(xin)鋼管的性能比(bi)較(jiao)見(jian)表(biao)4.3.14。
②. PEX管(guan)(guan)(guan)(guan)與UPVC管(guan)(guan)(guan)(guan)、鋁(lv)(lv)(lv)(lv)塑(su)(su)復(fu)合(he)管(guan)(guan)(guan)(guan)性(xing)(xing)能(neng)(neng)異同點。從(cong)性(xing)(xing)能(neng)(neng)上看，三種(zhong)管(guan)(guan)(guan)(guan)材(cai)除具有不(bu)銹(xiu)蝕、不(bu)結(jie)垢、不(bu)滋生(sheng)細菌和安裝(zhuang)簡便等共(gong)性(xing)(xing)外，還有一些(xie)區(qu)別：a.優良(liang)的(de)耐溫(wen)性(xing)(xing)能(neng)(neng)。PEX管(guan)(guan)(guan)(guan)使(shi)(shi)用(yong)(yong)溫(wen)度為(wei)-70～110℃，UPVC管(guan)(guan)(guan)(guan)使(shi)(shi)用(yong)(yong)溫(wen)度為(wei)5～45℃，鋁(lv)(lv)(lv)(lv)塑(su)(su)復(fu)合(he)管(guan)(guan)(guan)(guan)使(shi)(shi)用(yong)(yong)溫(wen)度為(wei)-40～85℃。b．防(fang)振性(xing)(xing)能(neng)(neng)。UPVC管(guan)(guan)(guan)(guan)由(you)(you)于(yu)采用(yong)(yong)膠(jiao)水粘接，防(fang)振性(xing)(xing)能(neng)(neng)略遜(xun)色于(yu)鋁(lv)(lv)(lv)(lv)塑(su)(su)復(fu)合(he)管(guan)(guan)(guan)(guan)和PEX管(guan)(guan)(guan)(guan)。c．使(shi)(shi)用(yong)(yong)壽命。UPVC管(guan)(guan)(guan)(guan)和鋁(lv)(lv)(lv)(lv)塑(su)(su)復(fu)合(he)管(guan)(guan)(guan)(guan)使(shi)(shi)用(yong)(yong)壽命約20～30年，PEX管(guan)(guan)(guan)(guan)約50年。d．抗化學腐(fu)蝕性(xing)(xing)能(neng)(neng)。由(you)(you)于(yu)PEX管(guan)(guan)(guan)(guan)其分子(zi)(zi)結(jie)構，即使(shi)(shi)處于(yu)高(gao)溫(wen)下也能(neng)(neng)輸送多種(zhong)化學物質，而不(bu)被(bei)腐(fu)蝕。e．良(liang)好的(de)記(ji)憶性(xing)(xing)能(neng)(neng)。當(dang)PEX管(guan)(guan)(guan)(guan)被(bei)加熱到(dao)適當(dang)溫(wen)度（小于(yu)180℃）時(shi)(shi)會變成透明狀，再冷卻時(shi)(shi)會恢復(fu)到(dao)原來的(de)形(xing)狀，即在(zai)使(shi)(shi)用(yong)(yong)過程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)任何(he)錯誤的(de)彎曲都可(ke)(ke)以通(tong)過熱風槍加以矯正，使(shi)(shi)用(yong)(yong)起來更加自如(ru)。f.不(bu)結(jie)垢。水中(zhong)(zhong)(zhong)(zhong)碳酸(suan)氫鈣(gai)及鎂(mei)離(li)子(zi)(zi)的(de)存在(zai)易形(xing)成沉淀物，慢慢使(shi)(shi)管(guan)(guan)(guan)(guan)道堵塞，而PEX管(guan)(guan)(guan)(guan)具有較低的(de)表面張力(li)(li)以致使(shi)(shi)高(gao)表面張力(li)(li)的(de)水不(bu)會被(bei)浸潤管(guan)(guan)(guan)(guan)壁，從(cong)而防(fang)止管(guan)(guan)(guan)(guan)內水垢的(de)形(xing)成。g.環(huan)保(bao)性(xing)(xing)能(neng)(neng)。PEX管(guan)(guan)(guan)(guan)是無污(wu)染(ran)(ran)環(huan)境(jing)的(de)綠色管(guan)(guan)(guan)(guan)材(cai)，不(bu)含任何(he)毒素，也不(bu)釋放有害物質，焚燒(shao)后只產(chan)(chan)生(sheng)水和二氧化碳。而UPVC管(guan)(guan)(guan)(guan)在(zai)生(sheng)產(chan)(chan)過程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)加入重金屬添加劑，同時(shi)(shi)本身殘存的(de)單(dan)體氯乙烯(xi)在(zai)使(shi)(shi)用(yong)(yong)時(shi)(shi)一起進入輸送的(de)介質中(zhong)(zhong)(zhong)(zhong)，易造成介質污(wu)染(ran)(ran)；鋁(lv)(lv)(lv)(lv)塑(su)(su)復(fu)合(he)管(guan)(guan)(guan)(guan)由(you)(you)于(yu)中(zhong)(zhong)(zhong)(zhong)間為(wei)鋁(lv)(lv)(lv)(lv)層(ceng)，因(yin)鋁(lv)(lv)(lv)(lv)和塑(su)(su)料的(de)膨脹系數不(bu)一樣(yang)，易發生(sheng)龜裂現象，屬不(bu)可(ke)(ke)降(jiang)解物質，其垃圾易造成環(huan)境(jing)污(wu)染(ran)(ran)。
3. PEX管的領域(yu)。
①. 室(shi)內給(gei)水(shui)(shui)管、熱水(shui)(shui)管、純凈(jing)水(shui)(shui)輸(shu)(shu)送管。②. 食品(pin)(pin)中液體食品(pin)(pin)輸(shu)(shu)送管道(dao)。③. 水(shui)(shui)暖(nuan)供(gong)熱系(xi)(xi)統(tong)、中央空調管道(dao)系(xi)(xi)統(tong)、地面輻射(she)采(cai)暖(nuan)系(xi)(xi)統(tong)、太陽能(neng)熱水(shui)(shui)器系(xi)(xi)統(tong)等。④. 電(dian)(dian)信、電(dian)(dian)氣用配(pei)管。⑤. 電(dian)(dian)鍍、石油、化工(gong)廠輸(shu)(shu)送管道(dao)系(xi)(xi)統(tong)。
4. 交聯聚乙烯PEX管的主(zhu)要標(biao)準(zhun)見表(biao)4.3.15。
