olefin resin 8 0 ldpe low density polyethylene 2 uv100 uv masterbatch 10 5 white mb 70 tio2 pigment and 30 polyethylene 6 ab 150 anti block the melt temperature range of the lower coating layer was between 490 u00b0 f to 550 u00b0 f chill roll temperatures varied between 45 u00b0 f and 85 u00b0 f a second roofing underlayment according to another embodiment comprises a woven polypropylene scrim the scrim comprised upper and lower coating layers corresponding with upper and lower surfaces of the scrim the polypropylene scrim used was a woven polypropylene with 11 0 u00d7 5 8 tapes per inch the upper surface of the scrim was coated first upper coating layer was comprised of a first upper layer or core layer and a second upper layer or skin layer the core layer comprised 70 by weight of the upper coating layer the skin layer comprised 30 by weight of the upper coating layer the core layer comprised 1 uv100 uv masterbatch 10 beige 889822 pigment 8 ldpe low density polyethylene and 81 h pp homo polymer polypropylene the skin layer comprised 2 uv10 uv masterbatch 10 beige 889822 pigment 8 ab150 anti block 10 h pp homo polymer polypropylene and 70 kraton u00ae md6649 compound s e b s block copolymer it should be noted that the amount of h pp in the skin layer varies from.