太阳能电池组件密封用专用灌封胶那个牌子好?
国外基本是用聚氨酯灌封胶，国内可能还是用的硅胶较多，一是国内对胶水体系之间的区别没有概念性，二是很多忽略了灌胶后的具体作用，或可以说为了灌胶而灌胶吧。其实所谓牌子不牌子的灌到里面体系不出来的，能够达到使用目的的才叫好吧。目前就产品而言无论价格还是防水性聚氨酯都优于硅胶，环氧肯定不适合。暂不知道还有无其他具体要求，我们公司的有REACH（遇到很多人说不知道REACH只要ROHS报告，哎供应商的无良真的会害死人啊），UL-V0，导热系数达到0.8有第三方报告，防水IP67肯定没问题的胶水价格有量的话至多报到15左右吧，楼主按这些条件对比一下其他的吧。
光伏组件灌封胶是什么
就组件做好之后的密封胶水，用了之后过段时间成固态，防止进水，漏电什么的
太阳能光伏组件密封胶的UL认证中，阻燃性一般都是做到V-0级，最高的不是5VA级吗？5VA级的测试我们能做吗？
塑料的防火认证最高级是5VA,申请5VA周期很长，费用很高，如果材料不行还过不了。
根据UL94标准判定材料的难燃性水平。按照HB、V-2、V-1、V-0的顺序，难燃性依次增大。一般说的难燃材料指的是V-0。除了传统的评价方法之外，还设定了上一级的5V评价。作为定位，难燃性顺序依次为V-0、5VB、5VA。由于5V评价的 试验 方法与传统相比有些不同，所以卡中象V-0、5VA那样就表示进行了两个 试验 。难燃性 HB < V-2 < V-1 < V-0 < 5VB < 5VA
UL94 5VA & 5VB Flammability Standard
Specimens
Bars: Length 125 mm (5 in) x Width 13 mm (0.5 in) x Thickness [typically 3.0 mm (1/8 in)].
Plaques: Length 150 mm (6 in) x 150 mm (6 in) x Thickness [typically 3.0 mm (1/8 in)].
Procedure for Bars
1.A total of 10 specimens (2 sets) are tested per thickness.
2.Five specimens of each thickness are tested after conditioning for 48 hours at 23 degrees C and 50% RH.
3.Five specimens of each thickness are tested after conditioning for 7 days at 70 degrees C.
4.For bar specimens, the specimens are mounted with the long axis vertical.
5.A 125 mm overall high Bunsen burner flame with a 40 mm blue inner cone is applied to the lower corner of each specimen at an angle of 20 degrees from vertical such that the tip of the blue inner cone touches the specimen. The flame is applied for 5 seconds and removed for 5 seconds. The operation is to be repeated until each specimen has been subjected to 5 applications of the test flame.
Procedure for Plaques
Same as for bars except that the plaques are to be mounted on the horizontal plane with the flame applied to the center of the bottom surface of the plaque.
Requirements for 5VA
1.The specimens may not burn with flaming or glowing combustion for more than 60 seconds after the fifth application of the test flame.
2.The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
3.Plaque specimens may not exhibit burnthrough.
Requirements for 5VB
1.The specimens may not burn with flaming or glowing combustion for more than 60 seconds after the fifth application of the test flame.
2.The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
3.Plaque specimens can exhibit burnthrough.
