RRRF HDPE spools

Quick question. Does anyone know approximately how many meters are in the 5lb spool from RRRF. I have a price here for 3mm black/white HDPE, 300m reel for AU$50. I'm trying to figure out if this is good/bad/ugly.

Thanks in advance.

-Mark

P.S the place I got the price from is www.plastral.com.au

Batmark,

Let's see. HDPE has about 0.95-0.97 g/mL according to some random source online--I just did a quick search and picked the first result that had info that I wanted so this may not be totally accurate! :-) For the 2 kg spool we have that comes out to 2105.26 mL of HDPE--2000/.95. To get length from this we need to recognize that V = A * L and that A = Pi*r^2, and V = 2105.26 mL. So, gathering everything together and making sure the units come out correctly we solve for L and get 7,445.8 meters of HDPE.

After getting that result I start to doubt it. That's a LONG bit of HDPE! WTF. I may have done something wrong but it's late and I want to go to bed. Someone check me.

Demented

ok....

I just did the same thing as you... except I got 327m. I think that sounds more reasonable.

Damn you making me do maths. This is supposed to be my holidays.

So that makes it twice as expensive as at RRRF. DAMN!

-Mark

This site [k-mac-plastics.com] says 3mm HDPE is 220ft/lb (147.833175m/kg). The 5lb reel, then, is about 1100ft (335m).

Is 3.0mm right, double check. someone mentioned that the extruder really needs material SMALLER than 3.0mm... like 2.6mm.

Or am I confused?

yup, the RRRF stuff is 3mm. It easily fits through the machined heater barrels and PTFE that I had made, so those must be slightly larger.