FOAMED SEPARATOR SPLINES FOR DATA COMMUNICATION CABLES
First Claim
1. An article comprising a foamed, polymeric, separator spline shaped to isolate at least one twisted pair of conductors.
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Accused Products
Abstract
A separator spline formed of a foamed, halogen-free polymeric material for separating twisted pairs of conductors is described. The isolator may take the shape of an “X”, a +, a rod, a star configuration, a tube or a flat rectangular shape, with the isolator separating twisted pairs of conductors. In the case of the “X”-shape, the twisted pairs are separated by the arms of the X. The halogen-free polymeric material is preferably selected from a resin selected from the group of polyetherimide (PEI), polyetherimide/polysiloxane copolymer, elastomer-modified-polyphenylene-ether blend, and combinations thereof. The isolator and twisted pairs are preferably part of a communication cable and being covered with a sheath.
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Citations
27 Claims
- 1. An article comprising a foamed, polymeric, separator spline shaped to isolate at least one twisted pair of conductors.
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12. An article comprising a halogen-free separator spline for isolating at least two twisted pair of communication conductors to reduce cross-talk between the conductors, the article comprising:
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two twisted pairs of communication conductors, a foamed, halogen-free separator spline, the separator spline being interposed between the two pairs of communication conductors, the separator spline comprising a foamed polyetherimide (PEI) or a polyetherimide/siloxane copolymer, wherein the foam reduces the density, as compared to a corresponding non-foamed resin, in the range of about 3% to about 55%. - View Dependent Claims (13, 17)
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- 14. A lightweight, flame and smoke retardant communication cable comprising at least two twisted pairs of communication conductors, separated by a halogen-free, foamed polymeric separator spline, the twisted pairs and spline being sheathed by an outer covering.
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18. A communication cable comprising a plurality of twisted conductor pairs, the conductor pairs being separated by a separator spline, wherein the separator spline has improved smoke, flame, and reduced toxicity properties;
- wherein the separator spline comprises a melt processed, foamed, polyetherimide (PEI) component selected from the group of polyetherimide homopolymers, polyetherimide copolymers, and combinations thereof, the separator spline having a reduced density, as compared to non-foamed PEI, of from about 3% to about 55%.
- View Dependent Claims (19, 20, 21, 22, 23)
Specification