Pigments for biodegradable plastic
Pigments for biodegradable plastic
(OP)
I am looking for pigments for biodegradable plastic. Actually I am confused about which kind of standard I need to follow to pick up the pigment.
Thanks.
Thanks.





RE: Pigments for biodegradable plastic
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RE: Pigments for biodegradable plastic
So, to be compostible the total residue can be no more than 1 weight %. That means adding a little bit of inorganic pigment could mean that your compostible plastic no longer meets the requirement. So any pigment choice should be made very carefully. As Pat mentioned, good pigment suppliers should be able to help.
RE: Pigments for biodegradable plastic
Actually I talked to some big suppliers of pigment, such as Clariant and Ciba. They are also not sure for this issue. In my understanding, first, the pigment should not affect the degradation behavior of biodegradable plastic, second, it would not introduce the hazard materials to the enviroment. Like Demon3 said, the inorganic pigment maybe not a good candidate. The possibility is some organic pigments that can decompose with the biodegradation of the plastic and there is no release of hazard chemicals.
From what I know, Polyone is the only one that claims they have special masterbatch for biodegradable plastics. But I really don't know what's the special for their product.
I expect more discussion in this field.
RE: Pigments for biodegradable plastic
Certain dyes or organic pigments are toxic to some organisms and that should be considered.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.