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Polypropylene Fillers

Polypropylene Fillers

Polypropylene Fillers

(OP)
I've been working with 20% talc filled polypropylene for moderately stiff printable materials.  Is there a filler or compounded resin available that will grant a notably stiffer extruded product (without sacrificing tear and crack resistance)?   Additionally, are there any suggestions for technique or materials that would decrease creep ('wavyness') of extruded PP/filler product?   Thanks.

RE: 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

RE: Polypropylene Fillers

Try this site -- it lists filler manufacturers for plastics

http://www.plastics-ez.com/plastics/0055...

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.

RE: Polypropylene Fillers

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.

RE: Polypropylene Fillers

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

RE: Polypropylene Fillers

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.  

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