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RE: LDPE (clear or white/translucent?) (fwd)





---------- Forwarded message ----------
Date: Thu, 23 Apr 1998 14:17:20 -0700
From: "Basura, Brian" <brian.basura-at-unistudios-dot-com>
To: 'Tesla List' <tesla-at-pupman-dot-com>
Subject: RE: LDPE (clear or white/translucent?) (fwd)

Harri,

I was told it's pure PE so it should be fine.  But just to be sure, I asked
them to FAX me the specification sheet before I'll buy it.

Thanks,
Brian  B.

> ----------
> From: 	Tesla List[SMTP:tesla-at-pupman-dot-com]
> Sent: 	Thursday, April 23, 1998 1:23 PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Re: LDPE (clear or white/translucent?) (fwd)
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Thu, 23 Apr 1998 22:51:57 +0300
> From: Harri Suomalainen <haba-at-cc.hut.fi>
> To: tesla-at-pupman-dot-com
> Subject: Re: LDPE (clear or white/translucent?) (fwd)
> 
> >I went to my local plastic supplier for LDPE (.030 mil) and what they had
> >wasn't clear.  They called  it white/translucent.  Is this OK to use as a
> >dielectric?  The counter dweeb said that it turns whitish at that
> thickness.
> 
> Unfortunately color does not tell you everything. You should have info on
> *material*. Important factors might be eg. fillers (if used) which tend to
> lower cap Q (ie. higher losses).
> 
> Weather it is transparen or not might be just a matter of mechanical
> handling.
> Some same polymers might be white when molded but transparent when
> it is a sort of "pulled" by the mashinery to alling microscopic fibres.
> I've
> seen nice practical examples of such.
> 
> If it is pure PE it is pure PE. Yet, even different PE grades do have
> differences.
> Thats why you usually overrate it to take much more voltage etc and assume
> low losses which is true for most cases.
> 
> 
> --
> Harri Suomalainen     mailto:haba-at-cc.hut.fi
> 
> We have phone numbers, why'd we need IP-numbers? - a person in a bus
>