Bulk density > 1.36g/cm^3
Bulk density > 1.36g/cm^3
(OP)
Hello,
I am trying to find a plastic in pellet form that has a bulk density greater than 1.36g/cm^3.
Do any of you know of one?
I am trying to find a plastic in pellet form that has a bulk density greater than 1.36g/cm^3.
Do any of you know of one?






RE: Bulk density > 1.36g/cm^3
I know one manufacturer makes 85% Bronze filled nylon and also a heavily filled PP.
I will look up some details tomorrow.
If I forget, remind me
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bulk density > 1.36g/cm^3
RE: Bulk density > 1.36g/cm^3
This stuff is dense at a sg of 2.3 but data sheet very limited:
http://www.silon.eu/datasheets/taboren/PH82B75.pdf
As Pat stated, bronze might do it - it's all custom stuff though.
Application sounds intriguing...
Cheers
Harry
RE: Bulk density > 1.36g/cm^3
Modulus, yield strength, impact resistance etc.
By the way, the density of a polymer does not increase linearly as you add a certain weight % of filler. Rather the density of filled polymers varies linearly with the volume % of each component.
I just mention this because if you shoot for a density of 1.36 you will miss unless you calculate based on volume percentages.
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Bulk density > 1.36g/cm^3
The bronze filled was also developed for munitions, some as the projectile in rifles etc, some for if I told you I would have to shoot you stuff.
It has also found application as bearings, but the tensile and elongation are really poor.
Duromer would probably do less than 1/2 tonne of such a special compound, but at a considerable premium.
The cost premium is worked out by a simple formula. Add the cost of an extra 100 Kg to cover waste when cleaning and starting up and add 3 hour to the time portion of the cost.
A number of people also offer barium sulphate filled materials (most commonly PP)for more common heavy applications. This will not be as heavy as the others mentioned here but may be off the shelf items. A very common application is weights for vertical venitian blinds.
I don't know of the top of my head the conversion between packing density and SG, but it will vary a bit due to variations in pelet geometry.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bulk density > 1.36g/cm^3
The two most common high density, inert, cheap fillers are:
1. Barium sulfate (barytes or blan fixe)
2. Magnetite (see www.minelco.com and look for the tradename MagniFi h
The former is white with a density around 4.5 whereas the latter is black with a desnity of 5.0.
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Bulk density > 1.36g/cm^3
They need a packing density, not an SG of 1.36.
The SG will need to be at least 50% higher, possibly nearly twice as high, depending on pellet geometry.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bulk density > 1.36g/cm^3
I have an Excel sheet I made that allows you to input filler and polymer density and it plots the density of the composite versus weight % filler (a curve).
I will see if I can find that file and put in some numbers.
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Bulk density > 1.36g/cm^3
Thanks to everyone who replied, I appreciate it.
RE: Bulk density > 1.36g/cm^3
RE: Bulk density > 1.36g/cm^3
http://www.matweb.com/
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Bulk density > 1.36g/cm^3
Bulk density is a concern because the application is centrifugal.
I'll look at matweb.
Thanks.
RE: Bulk density > 1.36g/cm^3
The very high density plastics will not be cheap. I would try sand or lead shot or glass beads.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bulk density > 1.36g/cm^3
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Bulk density > 1.36g/cm^3
Concrete with iron slag particles
PP with iron slag particles
Epoxy with iron slag particles
Iron has a density of about 8gcm-3.
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell