| 摘要 |
This invention relates to a process for atomizing, spiral spraying, oscillation spraying or melt blowing propylene copolymers onto a substrate comprising selecting a poly-alpha olefin inter-polymer comprising:A) from 60 to 94% of units derived from an alpha mono-olefin having from 3 to 6 carbon atoms andB) from 6 to 40 mol % of units derived from ethylene or one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); andC) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B);wherein the inter-polymer has:i) an Mw/Mn of 6 or less;ii) a storage modulus G', determined upon cooling, intersecting a value of 0.3 M Pa at a temperature of less than 85° C.;iii) a G''/G' ratio of 18 or more when G' is 10 Pa when measured at a frequency of 1 hz; andiv) a viscosity of 5000 mPa.sec or less at 190° C., andatomizing, spiral spraying, oscillation spraying or melt blowing the inter-polymer into a substrate.Blends of the above copolymers can also be used herein.
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