Environmental Engineering Reference
In-Depth Information
Additive
Percentage
by weight of
resin
typically
used
Chemical nature Examples of use
Fillers
(reinforcing
and
nonreinforcing)
Up to 50%
Calcium carbonate,
talk, clay, zinc
oxide, glimmer,
wood powder
Figure 4.12
Major classes of additives used in plastics industry.
Sustainable products need to be safe to use. Safety of additives that can
leach out of food-contact plastics has drawn considerable public attention.
Endocrine disruptor effects (see
Chapter 7
) and toxicity often attributed to
