PETG

Density is higher than PLA and ABS.
Stiffness is significantly lower than PLA and may be compared to ABS.
Like ABS, PETG can readily be solvent welded. Cyclohexanone, Methyl ethyl ketone (MEK) and possibly acetone can be used. The Handbook of Plastics Joining suggests a mixture of cyclohexanone and MEK, but cyclohexanone alone also works.

Cyclohexanone is relatively benign, similar to acetone, but it considerably more expensive and less commonly available. MEK is, for the time being, still available in hardware stores, but is nastier and seems to take longer to reach full strength than cyclohexanone.

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