From RepRap
Revision as of 23:53, 15 December 2012 by Klk5327 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Polyethylene glycol (PEG)

Polyethylene glycol (PEG) is a potential water-soluble support mechanism that can be used for 3D printing.

For detailed information see this page.


PEG is a flexible, non-toxic water-soluble wax-like polymer.

Via a random MSDS, here: "Melting Point: Melting point increases as molecular weight increases: PEG 400 = 4-8C (39-46F) PEG 600 = 20-25C (68-77F) PEG1500 = 44-48C (111-118F) PEG 4000 = 54-58C (129-136F) PEG 6000 = 56-63C (133-145F)"


PEGs are used in cosmetics, medicine, used in food and food packaging. They can be used as plasticizers, solvents, water-soluble lubricants for rubber molds; wetting or softening agents, antistatics in the production of urethane rubber, components of detergents, etc.


Jesse Brennan pointed out that Lee Valley sells PEG 1000 and PEG 1450 for CAD$6/lb (USD$11.25/kg). PEG 1000 melts at 37C, PEG 1450 melts at 43C. (PEG x means PEG with a molecular weight of x). Lee Valley is an expensive but high-quality Canadian woodworking tool store. They sell the PEG as a "green wood stabilizer".