Polyolefin compositions having improved optical and mechanical properties
AssigneeBorealis Technology Oy
InventorsChristelle Grein, Tonja Schedenig
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Abstract
The invention relates to the use of a polyolefin composition comprising a propylene-ethylene random copolymer having an ethylene content of 0.5-10 wt % and a randomness R of the ethylene distribution in the polymer chain of ≧0.945 for the production of articles having high sterilisation resistance.
Claims14
Use of a polyolefin composition comprising a propylene-ethylene random copolymer having an ethylene content of 0.5-10 wt % and a randomness R of the ethylene distribution in the polymer chain of ≧0.945 for the production of sterilisable articles, having a Δ(haze) value of 100% or less, wherein the sterilization is carried out at 121° C. for 30 minutes and wherein further the randomness R of the ethylene distribution in the polymer chain satisfies the relationship R≧0.887+0.048*CM-0.007*CM2, wherein CM denotes the ethylene content in wt % of the propylene-ethylene random copolymer.
A process for sterilising an article comprising,
- providing an article comprising a polyolefin composition comprising a propylene-ethylene random copolymer having an ethylene content of 0.5-10 wt % and a randomness R of the ethylene distribution in the polymer chain of >0.945 for the production of sterilisable articles, having a Δ(haze) value of 100% or less, wherein the randomness R of the ethylene distribution in the polymer chain satisfies the relationship R>0.887+0.048*CM-0.007*CM2, wherein CM denotes the ethylene content in wt % of the propylene-ethylene random copolymer.
Dependencies are inferred from the claim text.