A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form

摘要

The present invention relates to a process which provides a route to convert conventional foams to auxetic foams as an alternative to existing thermomechanicalprocesses[ WO88 /00523 ]. The present process involves taking the said conventional foam, exposing it to a correspondingly suitable solvent, removing excess solvent, compressing it, drying the foam in the compressed state only releasing it after the crying process is complete. The solvent can also be used in a process to reconvert the auxetic foam, or any other foam made auxetic by any other process to a conventional foam. This process involves exposing the foam to a suitable solvent, pulling it (sometimes not necessary), and drying the foam.