橡胶水管绝缘材料

Rubber insulation pipe: PVC/NBR PLASTIC-RUBBER FOAM MATERIALItemUnitSpecificationSort 1Sort 11boardpipeboardpipeDensityKg/m365-8540-110FlammabilityGradeB1GradeB2Oxygen index≥32Oxygen index≥26SDR≤75SDRConductivity factor(Average temp.0)w/(m.k)≤0.038≤0.042Water vapor permeabilityCoffientg/(m.s.pa)≤4.4*1010factor≥4.5*1010Water absorption ratio in cacuum%≤10Dimension stability105±3,7d%≤10Crack resistanceN/cm≥3.0≥3.0≥3.0≥3.0Compression resilience ratioCompression ratio50%Compression ratio70h%≥70Anti-ozoneOzone pressure202Pa 200hNot CrackingAging resistance 150hSlightly crumpling,no cracks,no pin holes,not deforming.