... walk in cold room 3.PU density>40kg/m3,export over 30 countrie PU sandwich panel for cold room focus ... We speical make PU sandwich panel: PU cold storage panel by continous line,PU wall panel,PU roof panel,PU cam lock panel. ... 180mm,200mm. No2.uncontinous line,its can make PU cam lock panel,its standard width is 960mm,the ... .118(sec)Self-distinguishing: less than 5 PU sandwich panel for cold room,freezer