| abstract |
[PROBLEMS] A solar cell sealing material using an olefin-based (co) polymer, which is excellent in flexibility, stress absorbing ability, transparency, low temperature impact strength, etc., and which can improve productivity by eliminating crosslinking if necessary. to provide.n n n [Solution] 1 to 40 parts by weight of polypropylene (i) having a content of propylene units greater than 90 mol%; And 60 to 99 weight of propylene / ethylene copolymer (ii) containing 45 to 90 mol% of propylene units, 10 to 25 mol% of ethylene units and 0 to 30 mol% of α-olefin units (a) having 4 to 20 carbon atoms. Part (i) + (ii) = 100 parts by weight, and 5 to 95 parts by weight of the ethylene / α-olefin copolymer (B) based on 95 to 5 parts by weight in total of (i) and (ii) A solar cell sealing material containing ((i) + (ii) + (B) = 100 parts by weight). |