Auxetic filamentary materials

Details Auxetic filamentary materials Auxetic filamentary materials

2007-07-24

2007-07-24

Salvatore, Lynda (Department: 1771)

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

C264S109000, C264S126000, C428S299700, C428S036100

Reexamination Certificate

active

11018062

ABSTRACT:
An auxetic material, which has a negative Poisson ratio so that it has the property of expanding or contracting transversely to a direction in which it is extended or compressed, is made in filamentary or fibrous form. A suitable process involves cohering and extruding heated polymer powder so that the cohesion and extrusion is effected with spinning to produce auxetic filaments. Typically the powder is heated to a temperature sufficient to allow some degree of surface melting yet not high enough to enable bulk melting.

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