太陽能電池組件密封用專用灌封膠那個牌子好?

國外基本是用聚氨酯灌封膠，國內可能還是用的硅膠較多，一是國內對膠水體系之間的區別沒有概念性，二是很多忽略了灌膠后的具體作用，或可以說為了灌膠而灌膠吧。其實所謂牌子不牌子的灌到里面體系不出來的，能夠達到使用目的的才叫好吧。目前就產品而言無論價格還是防水性聚氨酯都優于硅膠，環氧肯定不適合。暫不知道還有無其他具體要求，我們公司的有REACH（遇到很多人說不知道REACH只要ROHS報告，哎供應商的無良真的會害死人啊），UL-V0，導熱系數達到0.8有第三方報告，防水IP67肯定沒問題的膠水價格有量的話至多報到15左右吧，樓主按這些條件對比一下其他的吧。

光伏組件灌封膠是什么

就組件做好之后的密封膠水，用了之后過段時間成固態，防止進水，漏電什么的

太陽能光伏組件密封膠的UL認證中，阻燃性一般都是做到V-0級，最高的不是5VA級嗎？5VA級的測試我們能做嗎？

塑料的防火認證最高級是5VA,申請5VA周期很長，費用很高，如果材料不行還過不了。

根據UL94標準判定材料的難燃性水平。按照HB、V-2、V-1、V-0的順序，難燃性依次增大。一般說的難燃材料指的是V-0。除了傳統的評價方法之外，還設定了上一級的5V評價。作為定位，難燃性順序依次為V-0、5VB、5VA。由于5V評價的 試驗 方法與傳統相比有些不同，所以卡中象V-0、5VA那樣就表示進行了兩個 試驗 。難燃性 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.