... Interliner and packing materialBecause of its good adherence, strength and low price, Spun bonded PP nonwoven is used as interliner in ... into travel and daily articles as required because of its low price, acid and alkali-proof, good breathability, washable, light, convenience ... Polypropylene is the main raw material; specific gravity is 0.9, is only third five, fleecy and touches well.2. ...