Polypropylene (fwd)

---------- Forwarded message ----------
Date: Thu, 23 Jul 1998 16:24:08 +-100
From: "Gregory R. Hunter" <ghunter-at-enterprise-dot-net>
To: 'Tesla List' <tesla-at-pupman-dot-com>
Subject: Polypropylene

Can anybody give me data on polypropylene film?  I saw a flat plate cap at
the UK Teslathon that appeared to be made of plastic document protectors &
foil.  I found some pocket-style document protectors at work and examined
them.  The recycling symbol says they are polypropylene.  I can't find any
values as to dielectric strength, dielectric constant, etc., in my

Also, does anyone know the meanings of the various plastics recycling
symbols?  For example, I know "HDPE 2" is polyethylene, but I'm wondering
what the shorthand is for various other plastics.