The Applicant has now found that by selecting a suitable polyolefin material, {HEAD ~ in particular a copolymer} of {TAIL ~ polypropylene} with a C4 C8 α olefin, it is possible to avoid or at least substantially reduce the above shape variations of the extruded component, in particular of a buffer tube containing optical fibers 
The Applicant has now found that by selecting a suitable polyolefin material , { HEAD ~ in particular a copolymer } of { TAIL ~ polypropylene } with a C4 C8 α olefin , it is possible to avoid or at least substantially reduce the above shape variations of the extruded component , in particular of a buffer tube containing optical fibers
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