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Re: [IP] plastics

Thanks Ted. I'll tell me mom to rest easy.

>OK, Tara, I'm a plastics molding engineer (though in a whole different realm
>of plastics) and think I know what she's talking about. There is a lot of
>about PVC plastics (which is Poly Vinyl Chloride, BTW). They are trying to ban
>it's use in Europe, for instance.
>Anyway, the pump hoses are made of 2 different plastics which are
>which keeps the 2 in separate layers. The outer layer is a more flexible
>To quote the information on MiniMed's webpage at:
>It has long been known that polyolefin plastics have fewer binding sites, are
>more resistant to carbon
>dioxide penetration, and leach far fewer materials into solution than PVC
>plastic. But polyolefin tubing
>by itself is not satisfactory, since it is brittle and can kink or break
>By making a tubing with an
>inner layer of polyolefin plastic, a middle bonding layer, and an outer
>layer of
>PVC plastic for kink
>resistance and strength, April and her team were able to combine the best
>features of both plastics into
>tough insulin-compatible "Polyfin" tubing. They also decided that Polyfin
>should not be sterilized
>by gamma radiation, but by another process that does not affect
>So, in short, the newer tubing noiw in use doesn't have this problem.
>Ted Quick
>email @ redacted
>email @ redacted
>Insulin Pumpers website http://www.insulin-pumpers.org/
>for mail subscription assistance, contact: HELP@insulin-pumpers.org

Tara Dufour
Hargreaves, Charbonneau & Associates

Insulin Pumpers website http://www.insulin-pumpers.org/
for mail subscription assistance, contact: HELP@insulin-pumpers.org