What plastics are used to make ready-meal packets?

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Offline chris

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What is the plastic material used for microwave-able and oven bake-able ready-meals?
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Offline RD

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Re: What plastics are used to make ready-meal packets?
« Reply #1 on: 12/10/2012 01:23:19 »
poly(ethylene terephthalate), PET ...

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If crystallizable PET is used, the trays can be used for frozen dinners, since they withstand both freezing and oven baking temperatures.
https://en.wikipedia.org/wiki/Poly(ethylene_terephthalate)#Uses
« Last Edit: 12/10/2012 01:30:59 by RD »

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Offline damocles

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Re: What plastics are used to make ready-meal packets?
« Reply #2 on: 18/10/2012 00:06:39 »
I have just gone to the pantry and looked at one of my packages -- the polymer used in that package is polypropylene.
1 4 6 4 1
4 4 9 4 4     
a perfect perfect square square
6 9 6 9 6
4 4 9 4 4
1 4 6 4 1