Elongated article with good flexibility and high flame retardancy
AssigneeLEONI Kabel GmbH
InventorsLYDIE DELINEAU, MARTIN EGLI, MELANIE EGGERT, HENRICH KRUMP, VLADIMIR KWAPULINSKY
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Abstract
The invention relates to elongated articles and polymer compositions used for preparing the elongated articles. The elongated articles comprise an inner structure/one or more elements including a static/moving current medium or communication medium; and a halogen-free polymer composition surrounding the element(s). The polymer composition includes a linear very low density polyethylene (VLDPE) composition and one or more polyolefin-elastomers. In addition, the polymer composition includes a flame retardant filler.
Claims22
Elongated article comprising:
- (i) one or more elements including a medium with static/moving charge/current or communication medium;
- and
- (ii) a halogen-free polymer composition surrounding the element(s), wherein said polymer composition is obtainable or obtained by compounding and extrusion of at least the following components:
- (a) 24-26.5 wt.-% of a linear very low density polyethylene (VLDPE) composition having a density in the range from 0.85 g/cm3 to 0.93 g/cm3, and having a melting point of above 110° C.;
- (b) 9.5-13 wt.-% of one or more polyolefin-elastomers, wherein the polyolefin-elastomer(s) is/are (an) ultra-low density random ethylene-octene copolymer(s) having a glass transition temperature of below −50° C.;
- and
- (c) 61-66 wt.-% of flame retardant filler, which is a hydrated metal-based filler.
Elongated article, comprising:
- (i) an inner structure;
- and
- (ii) a polymer composition surrounding the inner structure, wherein the polymer composition comprises a mixture of a linear very low density polyethylene (VLDPE) composition, a polyolefin-elastomer, which is an ultra-low density random ethylene-octene copolymer, a mineral hydroxide/hydrated metal-based filler flame retardant filler, an antioxidant and a coupling agent composition;
- and wherein the polymer composition has
- (aa) an elongation at break in the range from 150% to 500%, as measured by IEC 60811-501;
- and
- (bb) a strength at break in the range from 7.5 MPa to 15.0 MPa, as measured by IEC 60811-501.
Dependencies are inferred from the claim text.