聚氨酯直埋保溫管發現現狀：
  保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)是影響(xiang)節(jie)能的(de)(de)(de)重要因素，保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)的(de)(de)(de)研制與(yu)應用(yong)越來(lai)越受到(dao)世界各國(guo)(guo)的(de)(de)(de)普遍(bian)重視。20世紀70年(nian)(nian)代(dai)后，國(guo)(guo)外普遍(bian)重視保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)的(de)(de)(de)生(sheng)產和應用(yong)，力求大(da)幅度減少(shao)能源的(de)(de)(de)消耗量，從(cong)而減少(shao)環(huan)境(jing)污(wu)染(ran)和溫(wen)(wen)(wen)(wen)室效(xiao)應。國(guo)(guo)外保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)工業已經有(you)(you)很長(chang)的(de)(de)(de)歷(li)史(shi)，而新型保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)材(cai)(cai)料(liao)(liao)也正在(zai)不斷(duan)地(di)涌現。1980年(nian)(nian)以(yi)前，我國(guo)(guo)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)的(de)(de)(de)發(fa)展十分緩慢，為數不多的(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)廠只能生(sheng)產少(shao)量地(di)下直(zhi)埋保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)，但(dan)中(zhong)(zhong)(zhong)國(guo)(guo)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)工業經過30多年(nian)(nian)的(de)(de)(de)努力，特別(bie)是經過近10年(nian)(nian)的(de)(de)(de)高速發(fa)展，不少(shao)產品從(cong)無到(dao)有(you)(you)，從(cong)單(dan)一到(dao)多樣化，質(zhi)量從(cong)低到(dao)高，應用(yong)越來(lai)越普遍(bian)。聚(ju)(ju)氨(an)(an)酯(zhi)(zhi)材(cai)(cai)料(liao)(liao)是目前國(guo)(guo)際(ji)上(shang)最常用(yong)的(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)材(cai)(cai)料(liao)(liao)。硬(ying)質(zhi)聚(ju)(ju)氨(an)(an)酯(zhi)(zhi)具有(you)(you)很多優(you)異性能，在(zai)歐美國(guo)(guo)家(jia)廣泛用(yong)于保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)隔熱領域。歐美等發(fa)達國(guo)(guo)家(jia)的(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)材(cai)(cai)料(liao)(liao)中(zhong)(zhong)(zhong)約有(you)(you)49%為聚(ju)(ju)氨(an)(an)酯(zhi)(zhi)材(cai)(cai)料(liao)(liao)，而在(zai)中(zhong)(zhong)(zhong)國(guo)(guo)這(zhe)一比例尚不足20%。因此(ci)，聚(ju)(ju)氨(an)(an)酯(zhi)(zhi)材(cai)(cai)料(liao)(liao)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)管(guan)在(zai)中(zhong)(zhong)(zhong)國(guo)(guo)的(de)(de)(de)發(fa)展還(huan)有(you)(you)很大(da)的(de)(de)(de)空(kong)間。