Patent ID: 9447272
Filing Date: 2016-09-20
CPC Classification: B32B,C08K,C08L,C09K,H01L,Y02E,Y10T

Claim Text:
1. A solar cell encapsulant material comprising a resin composition comprising a first olefin-based polymer and a second olefin-based polymer, wherein a crystal melting peak temperature of the first olefin-based polymer, as measured at a heating rate of 10° C./min in differential scanning calorimetry, is from 30 to 95° C.; an extrapolated onset temperature of melting of the second olefin-based polymer, as measured at a heating rate of 10° C./min in differential scanning calorimetry, is 100 to 130° C. a difference between the crystal melting peak temperature of the first olefin-based polymer and the extrapolated onset temperature of melting of the second olefin-based polymer is 35° C. or higher; and wherein a ratio by mass of the first olefin-based polymer to the second olefin-based polymer in the resin composition is in a range of 99:1 to 50:50, wherein the first olefin-based polymer is an α-olefin random copolymer that comprises units of an α-olefin and units of a monomer other than the α-olefin, and wherein a content of units from the α-olefin in the α-olefin random copolymer is from 2 to 40 mol %, relative to the total monomer units in the α-olefin random copolymer.