--- In [email protected], JGG KahnSr <jacekahn@...> wrote:
> Perhaps some chemist or chemical engineer on the list can provide an expert
> answer, but my understanding is that
> the molecules change under heat and the process is not entirely
> reversible--something about the polymers?--so
> that too much recycling results in imperfect integration of them. I do know
> over the years I've come across plastic
> parts that were either lumpy or unusually brittle.
hey jace, plastics are polymers, the same molecule arranged in a very long
chain, like 10,000. heat and pressure breaks the chains down which ruins the
good properties, so they can only be recyled once or twice without becoming
weak/brittle. dale, veteran of 33 years in the plastics industry.
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