Plastic material having enhanced magnetic susceptibility,...

Details Plastic material having enhanced magnetic susceptibility,... Plastic material having enhanced magnetic susceptibility,...

2005-07-26

2005-07-26

Walsh, Donald P. (Department: 3653)

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

Reexamination Certificate

active

06920982

ABSTRACT:
The magnetic susceptibility of one or more plastic articles is enhanced to enable their separation from a waste stream using magnetic separators. An amount of paramagnetic material is added to the plastic formulation to influence magnetic susceptibility without affecting the properties associated with the function of the plastic article. The material is preferably selected from a group consisting of magnetite, ferro-silicon and ferromagnetic particles (e.g., iron filings). The amount or material can be varied in the range of between 0.05% and 5% by weight of the plastic formulation. The plastic with altered magnetic susceptibility and a method separating that plastic from a waste stream are also disclosed.

REFERENCES:
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patent: 6290868 (2001-09-01), Martin et al.
patent: 6467628 (2002-10-01), Maehata et al.
patent: 6864294 (2005-03-01), Koike et al.
patent: 0.295.779 (1988-12-01), None

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