A little late for this thread, but outgassing plasticizers from PVC can
attack other plastics.
As an example, the insulating handles on a pair of wire nippers recently
dissolved large pits in the transparent face of a stop-watch, in one of my
tool kits. The points of near-contact retain their newly acquired flow
characteristic. Tacky.
The nippers are US-origin Xuron trade mark, so please don't start flaming
off-shore sources. The insulation on the handles is splitting, without any
regular use.
RL
On Wed, 18 Mar 2009 21:34:42 -0400, Bev Christian
<[log in to unmask]> wrote:
>Craig,
>Sorry for the late answer I have been traveling.
>
>The first records were made of a lacquer acetate plasticized with castor
>oil.
>The next materials used were:
>Shellac
>Bakelite
>Vinsol
>Valtie
>Vinyl chloride acetate
>
>33-1/3 LP and 45rpm Record Material:
>Vinyl records (33-1/3 LP and 45rpm) are made from polyvinyl chloride (PVC).
>
>Information on record material types was taken in part from 'The Care and
>Handling of Recorded Sound Materials' by Gilles St-Laurent Music Division of
>the National Library of Canada, January 1996.
>
>Vinyl chloride is a gas. PVC is a rigid solid and needs plasticizers to
>make it less so. In the case of cable sheathing a lot of plasticizer is
>needed and in many cases those plasticizers are the three phthalates on the
>REACH SVHC list!
>Bev
>RIM
>
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Cullum
>Sent: Thursday, March 12, 2009 5:11 PM
>To: [log in to unmask]
>Subject: [TN] Friday NTC question: is Vinyl really vinyl
>
>Hi techxperts,
>My mind got to wandering again, so here goes:
>
>The contemporary term for what we called "records" (LP's and 45's) is
>"vinyl".
>But to me something that is vinyl would be a lot less rigid.
>
>So, just what kind of material are records/"vinyl" made of?
>
>Thanks in advance.
>
>Craig Cullum, Engineering Technologist, AMTELCO
>e: [log in to unmask]
> [log in to unmask]
>f: 608 838 8367
>v: 608 838 4194, or 4197, x128
>
>Please visit us at www.amtelco.com
>
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