transparent plastic tea filter - minimal discoloration & cracking
transparent plastic tea filter - minimal discoloration & cracking
(OP)
I'm wondering what would be the best material, and whether there are coatings preventing discoloration.
PC would be my personal choice for this product as it seems the most widely used transparent plastic for kitchen appliances etc., I do see quite a few measuring bekers that crack. Is it correct that dicoloration occurs mainly because of microscopic surface damage, and particles getting stuck there?
I realise that my best option might be to go for a cheap material so that the filter can be replaced affordably, but obviously it would be better if waste and replacement could be prevented.
Kind regards,
Max
PC would be my personal choice for this product as it seems the most widely used transparent plastic for kitchen appliances etc., I do see quite a few measuring bekers that crack. Is it correct that dicoloration occurs mainly because of microscopic surface damage, and particles getting stuck there?
I realise that my best option might be to go for a cheap material so that the filter can be replaced affordably, but obviously it would be better if waste and replacement could be prevented.
Kind regards,
Max





RE: transparent plastic tea filter - minimal discoloration & cracking
PC does suffer from environmental stress cracking (ESC), also there is a big debate over whether PC should be used for food contact due to the bisphenol A component being a possible endocrine disruptor.
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: transparent plastic tea filter - minimal discoloration & cracking
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: transparent plastic tea filter - minimal discoloration & cracking
Chris DeArmitt - PhD FRSC CChem
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RE: transparent plastic tea filter - minimal discoloration & cracking
I would not recommend PVC for this.
As to staining, it can be very small particles trapped in very small cracks or scratches or other microscopic surface irregularities, but it can also be absorption into the matrix at a molecular level by diffusion, just like dyestuff is applied to textiles.
Regards
Pat
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RE: transparent plastic tea filter - minimal discoloration & cracking
If you are a tea drinker, it goes with the territory - tea stains!
I never put my (Brown Bess) teapot in the dishwasher - it removes all the patina off the inside! Taste!
We are now digressing into forbidden realms I fear....
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.