Yes, UNROLLS is a Scrabble word!

Letter values in Scrabble US: U 1, N 1, R 1, O 1, L 1, L 1, S 1.

Is it a valid word?

UNROLLS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

reverse the winding or twisting of
unroll, unfold, or spread out or be unrolled, unfolded, or spread out from a furled state

Also: wind off.