3248環(huán)氧玻璃布層壓板的顏色為淡青色或淺褐色。 層壓板表面平整、無氣泡、麻坑和皺紋，允許有不影響使用的其他缺陷，如：擦傷、壓痕、污點，及少量斑點。邊緣應(yīng)切割整齊，端面不得有分層和裂紋。2、2 主要性能指標 Main property indication序 號No.項 目Item單 位Unit試驗方法Testing Method指 標Indication物 理 性 能 Physical Properties1 密度Density g/cm3 GB/T5130 ≥1.82 玻璃纖維含量Glass Fibre Content% —— ≥603 吸水性（10mm）Water Obsorptionmg GB/T5130 ≤344 熱膨脹系數(shù)Thermal Expansion Coefficient1/℃ GB/T1036 11.1×10-65 導(dǎo)熱系數(shù)Coefficient of Heat Conductivityw/m.k —— 0.46機 械 性 能 Mechanical Properties6 垂直層向彎曲強度Flexural Strengthat perpendicular to lamination常態(tài)（23+2）℃Under normalMPa GB/T5130 ≥410熱態(tài)（150+5）℃At heatMPa ≥2407 彎曲彈性模量Modulus of Elasticity in FlexureMPa ≥249008 壓縮強度Compressive strength垂直層向At perdicular laminationMPa ≥350平行層向At parallel to laminationMPa ≥2009 拉伸強度Tensile strength 縱向Lengthwise MPa ≥314橫向Crosswise ≥30010 沖擊強度（簡支梁）Impact strength charp（無缺口）No notch縱向Lengthwise kJ/ m2 ≥160橫向Crosswise ≥120（缺口）Notched縱向Lengthwise ≥40橫向Crosswise11 粘合強度 Bonding strength N Q/JBQP51 ≥766012 平行層向剪切強度Shear strength at parallel to laminationMPa GB/T5130 ≥3013 洛氏硬度 Rochwell strength HRM GB/T9342 ≥115電 氣 性 能 Dielectric Properties絕緣電阻InsulationResistance常態(tài)下 Under normal MΩ GB/T5130 ≥1.0×106浸水(24+1)h后After Immersion for24+1h≥5.0×104電氣強度（于90℃+2℃變壓器油中1min）Dielectric strength in transformer oil at 90℃ for 1 minkv/mm ≥14.2平行層向耐電壓（于90℃+2℃變壓器油中1min）Proof voltage in transformer oil at 90℃ for 1 min≤194 KV ≥45介質(zhì)損耗因數(shù)（于浸水后，1MHz時）Dielectric loss factor after immersion at 1MHz≤0.04介質(zhì)常數(shù)（于浸水后，1MHz時）Dielectric loss Constant after immersion at 1MHz≤5.5表面電阻率Surface Resistivity常態(tài)Under normal MΩ GB/T1410 ≥1.0×107浸水（23+2℃/24h）After Immersion of 23+2℃ for 24th≥1.0×105體積電阻率Volume Resistivity常態(tài) Under normal MΩ.m ≥1.0×105浸水（23+2℃/24h）After Immersion of 23+2℃ for 24th≥1.0×103相比電痕化指數(shù)Comparative Trackling IndexGB/T4207 ≥200耐 熱 性 能 Thermal Properties玻璃化轉(zhuǎn)變溫度TgGlass Transition Temperature℃ IEC61006 ≥172熱壓收縮率Reduction rate of Heat press% 參考ASTMD621 ≤0.40溫度指數(shù) Thermal Index GB/T11026.1 ≥155