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PostPosted: Sun Apr 27, 2008 8:40 pm 
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It wouldn't be a problem if people would stop throwing inferior whistles overboard on cruise ships. :o


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PostPosted: Mon Apr 28, 2008 5:05 am 
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Location: Aurora, CO
sbfluter wrote:
The Walrus is right. And not only that but there's a story the news isn't telling you, which is the accumulation in the environment of plastic particles. Plastic gets into the environment as litter, as industrial waste and when shipping containers fall off ships.

As it degrades (by the sun -- photodegredation) the plastic pieces get smaller and enter the food chain at the bottom through filter-feeders in the ocean, concentrating the estrogenic effects up the chain. There's an area in the Pacific Ocean the size of Texas with 6 times more plastic by weight than biological life.

I'd worry more about the containers your food and other items are packaged in than your flute if I were you.


The BBC and one of the science channels recently have covered this, in particular how it is killing seabirds that think the plastic is food and feed it to their chicks who's stomachs become full of undigestable plastic and subsequently die. I suspect plastic is our biggest contamination issue, even beyond nuclear waste.

KAC

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 Post subject: Re: Delrin and BPA
PostPosted: Fri Sep 22, 2017 7:03 pm 
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Location: Lancaster, PA
Oh, it's much worse than that, folks. BPA is not good.
I, too, cannot find any web resources citing Delrin as containing it, however.

Here is what my Chemistry Ph.D. high school AP Chem teacher sister-in-law said when I followed up with "why is BPA bad?" to her statement that they'd just finished going over a unit on it in her AP Chem class.
Paraphrasing:
Normal molecules like this consist of benzine rings joined at angles to each other - thus they take up larger 3-D space. The benzine rings in BPA join flat, or sharing the same horizon, so to speak. In addition, the molecule is very small. This means (again, from her) they can get inside things easily, like, oh, DNA.

In addition, check these out:

http://www.npr.org/templates/story/stor ... =129031013

https://www.sciencefriday.com/segments/ ... bsorption/

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The Knotwork Band:

Kelli: fiddle

Craig: guitars, bodhrán, vocals

Tommy: high and low whistles & Irish flute; resonator mandolin, Irish bouzouki,
& acoustic bass guitar; hurdy gurdy & Northumbrian small pipes; bodhráns & bones; vocals

www.theknotworkband.com


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 Post subject: Re: Delrin and BPA
PostPosted: Fri Sep 22, 2017 7:20 pm 
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Wow! Decade Old Thread COMES ALIVE like Peter Frampton!

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 Post subject: Re: Delrin and BPA
PostPosted: Sat Sep 23, 2017 6:32 am 
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Delrin is VERY inert. It's used widely in medical devices and food industry machinery. It's FDA certified as food safe so I wouldn't worry about its use in a whistle. I checked into this before I started using a generic version of the polymer for my whistle fipples.

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