Polyester moulds and elevated temps

Talk Composites - The Forum for Advanced Composites

Back

Polyester moulds and elevated temps

Author	Message
FLD	FLD posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 2.7K	Thanks guys. I really appreciate the experience input
	Reply Like 3
morepower	morepower posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 242, Visits: 1.2K	You can cook the styrene out if you post cure the moulds for about 24 hours and slowly take the temperature up to about 75 degrees C. When you use it for pre-preg you need to really make sure it is released up with a semi permanent release and dont cure over 65 degrees to try and stop not let the mould soften off or suffer from imprinting.. I have been using my polyester moulds for quite a while now with no issues... But I never go above 65 degrees... This is out of the polyester mould..
	Reply Like 3
Matthieu Libeert	Matthieu Libeert posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	when bagged and under high temperatures your mould will have some deformation...delamination is also possible at temperatures to high Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
	Reply Like 2
ajb100	ajb100 posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 346, Visits: 4.4K	Polyester isn't very stable dimensionally when heated so can distort a part Not as likely with old moulds, but there is the possibility for the styrene to remove the release effects of release agents if it has not fully cured and left
	Reply Like 3
FLD	FLD posted 11 Years Ago HOT Topic Details
Group: Forum Members Posts: 468, Visits: 2.7K	Just following on from another post... I have some older polyester moulds and I'd love to have a go with the EC pre-preg. I see that this material isn't recomended for hot mouldings. Why, what happens to it? Is it a case of 'its OK for a quick try but constant use fooks it' or is it a case of 'just dont'?
	Reply Like 3