Polypropylene Fillers

Glass fibre is an excellent reinforcement, and mica is a lot better than talc, but not nearly so good as glass. A lot also depends on sizeing or coupling agents.

Talc is generally best at reducing warpage, and fibre is worst re warpage, as it greatly reduces shrinkage along the flow, but only moderately reduces it accross the flow

Regards
pat

Try this site -- it lists filler manufacturers for plastics


Maybe one is close and you can ask a rep round and pick their brains?

Are you blending new grades for re-sale? or for your companies specific use?

Can you talk to people like GE Plastics or BSAF?

Othersources the UK has the Plastic Advisory Service on 09061 90 80 70 (calls cost £1.50 per mimute) But calling from the States is not a good idea

Does the US have something similar?

J.

ResinBlend,

Try "Glass Bead" for a filler.

I would tell you where you could get it from, but "PATPRIMMER" may rip into me again for believing that I am trying to do some advertising.

Glass beads are an excellent filler, but they don't really reinforce.

I only know of one source, and that is from some very old info, so I promise I won't rip into anybody for identifying a source.

If more than one source is known, I think it is appropriate to identify all possible sources, so as to avoid the appearance of commercial any commercial motive

Regards
pat

Most common used materials for stiffness improvement, glass fibre is best, talc, wollastonite and mica are next with calcium carbonate being last.
Warpage is usually caused by differential shrinkage, irregular crystallisation, and polymer orientation. Talc will not stop warpage.