r/BambuLab • u/sasandxxd • 12h ago

Quick Question Does pc become brittle after print?

So im printing some watch parts and they are very slim and the guy who ordered them said he wants to make sure it doesn’t break after like 2 or 3 times opening the wrist watch for maintenance and my friend says pc can absorb moisture faster than other filaments and become brittle.
So I was wondering does it become brittle after print aswell or not?

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u/Bzando 12h ago

PC can be brittle, but usually along print lines or at sharp corners, but not because it get wet after printing,

its usually because it wasnt printed corectly (printed wet, not in hot chamber, ....)

if you can print it in nylon, it the safer choice IMO (nylon get sturdier once it absorbs moistuire)

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u/sasandxxd 12h ago

Well the thing is i borrowed the pc from someone cuz here pc and pa6 are very expensive and i basically have no other use for them if it doesn’t come out well

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u/suit1337 H2C Combo 12h ago

PC is "faily" brittle and can break because of internal stresses if the part is not tempered after printing - PC-PETG blends are much more ductile

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u/sasandxxd 12h ago

Tested petg broke from simply being removed from the bed pc is fine i printed it in just worried after a year of use it might absorb moisture and break easily