Page 245 - belden

TE CH N I C A L INF O RM A T I O N 245

Insulations and Jackets
Overview

Insulations Jackets Typical Characteristics of Popular
Insulation and Jacketing Compounds
Because we formulate our own insulations, Belden electronic cables are manufactured
they provide superior performance under a in a wide selection of jacketing materials. EPDM
variety of hostile environmental conditions.
®
• Flamarrest — A Belden jacketing EPDM (ethylene-propylene-diene elastomer)
Belden cables are available in UL Listed and innovation, Flamarrest is a low-smoke,
CSA Approved insulation compounds. flame retardant compound that is five is a chemically cross-linked elastomer
times more flexible than fluorocopolymer. with excellent flexibility at high and low
Among the insulations we offer: temperatures (150° to -55°C). It has good
Cables jacketed with Flamarrest are cost
• Polyethylene efficient and easy to install. insulation resistance and dielectric strength,
as well as excellent abrasion resistance and
• Polyvinyl chloride (PVC) Also included in our wide selection of
mechanical properties. EPDM also has better
jacketing compounds are:
• Polypropylene cut-through resistance than Silicone rubber,
• Polyvinyl chloride • Neoprene which it replaces in some applications.
Also available are:
• Polyethylene • EPDM EPDM is compatible with most varnishes,
®
• Datalene — For computer and data
• Polyurethane • CSPE but after the dip and bake cycle varnish
transmission, Datalene is crush resistant,
lightweight, and offers good performance • FEP • Silicone rubber tends to adhere to the insulation (because
characteristics over a wide range of • ETFE • Natural rubber EPDM, unlike some rubber insulations, does
temperatures. not exude oils or waxes). As lead wires are
• E-CTFE pulled apart for termination, the varnish
• FEP Insulated Plenum &
High-Temperature Cables — For data Special compounds and variations of cracks, sometimes breaking the insulation.
communications, instrumentation/control, standard compounds are used as well. To resolve this problem, a stearic solution
and other commercial and industrial
applications. Plenum cables eliminate is applied to the lead wire during the put-up
the need for conduit and reduce process. This ensures that rigid varnish does
installation time. not cause EPDM insulation to rupture when
the wire is terminated.
Field evaluations by numerous users reveal
that the coated EPDM has excellent varnish
resistance at least equal to synthetic
elastomers, cross-link polyethylene, or
silicone glass braid in dip and bake systems.

Flamarrest ®
Flamarrest is a plenum grade chloride-based
jacketing material with low smoke and low
flame spread properties. Cables jacketed with
Flamarrest meet the ANSI/NFPA Standard
262-1985 (U L910), Plenum Cable Flame Test.

Technical Information

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