Switching from polycarbonate to P.E.T.G. 1

[design2bgreen]

When changing plastics in blow molding, polycarbonate to PETG, is it necessary to re-tool the mold? Any help on this would be appreciated. I have tried searching the forums, and do not know if I am using the correct search terms.

Thanks

 

[Pud]

I guess it depends how much of a size change you can tolerate. PETG had a greater mould shrinkage than PC.

A Google search will give you the data you need.

http://www.tynevalleyplastics.co.uk

 

[patprimmer]

PETG has a lot bless mould shrinkage than PET and is not all that different to PC. I would need to check data sheets for exact numbers. Eastman and Bayer should be able to provide reliable data to the exact difference in shrinkage.

Regards
Pat
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[design2bgreen]

Thank you both for you help, and suggestions.