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安裝發(fa)泡(pao)膠(jiao)的原因在(zai)于熱(re)搜索(suo)縮冷脹(zhang)原因。中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)比較容(rong)易受氣(qi)候(hou)的影(ying)響。天氣(qi)干燥炎(yan)熱(re)的時(shi)候(hou)，中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)中(zhong)(zhong)(zhong)的水分會(hui)被蒸(zheng)發(fa)掉，中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)形態細微(wei)變小，不用(yong)發(fa)泡(pao)膠(jiao)的話，會(hui)產生(sheng)縫隙。天氣(qi)潮(chao)濕(shi)的時(shi)候(hou)，中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)容(rong)易吸收水份，使用(yong)發(fa)泡(pao)膠(jiao)作為縫隙緩沖物質，防止中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)發(fa)脹(zhang)，引起中(zhong)(zhong)(zhong)山(shan)(shan)木(mu)門(men)變形。

中(zhong)山木門的安(an)(an)裝(zhuang)方(fang)式有(you)兩(liang)種，一種叫：先立(li)口安(an)(an)裝(zhuang)法(fa)，即先一種叫：后(hou)塞(sai)(sai)口安(an)(an)裝(zhuang)法(fa)。先立(li)口安(an)(an)裝(zhuang)法(fa)即臨時(shi)固(gu)定門框(kuang)，隨砌墻固(gu)定門框(kuang)，待墻體砌完后(hou)拆除支撐。后(hou)塞(sai)(sai)口安(an)(an)裝(zhuang)法(fa)即砌墻時(shi)預留門洞，將(jiang)門套(tao)塞(sai)(sai)入門洞，然后(hou)與洞口連(lian)接。

先立口安(an)裝法因施(shi)工(gong)(gong)(gong)不便，施(shi)工(gong)(gong)(gong)過程(cheng)門套容(rong)易損壞，連(lian)接方(fang)法不科學已(yi)經淘汰，中(zhong)山木(mu)門行業安(an)裝明確規定：中(zhong)山木(mu)門采用后塞口的施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)序，洞(dong)口與(yu)門框間的安(an)裝縫隙應在8-30mm之(zhi)間。

為了(le)保證門(men)(men)套(tao)安裝后可以(yi)自由(you)脹(zhang)縮，門(men)(men)套(tao)與墻體之間的(de)縫(feng)隙(xi)應填充(chong)彈性(xing)(xing)材料，又(you)(you)要帶有一定的(de)粘(zhan)(zhan)結(jie)性(xing)(xing)能。為了(le)防止彈性(xing)(xing)材料吸(xi)水，彈性(xing)(xing)材料必須是閉(bi)(bi)孔性(xing)(xing)結(jie)構。聚氨(an)酯發(fa)泡膠能夠兼顧(gu)具備這些功能：它本身(shen)具有較強的(de)粘(zhan)(zhan)結(jie)性(xing)(xing)，又(you)(you)屬于閉(bi)(bi)孔結(jie)構的(de)彈性(xing)(xing)材料，所以(yi)可以(yi)吸(xi)收門(men)(men)套(tao)、建筑洞口產生(sheng)的(de)脹(zhang)縮變形，又(you)(you)能使門(men)(men)套(tao)與門(men)(men)洞粘(zhan)(zhan)接密(mi)封，起到隔熱保溫的(de)作用。