초록 ▼

An expanded, memory molded, increased density, highly impact-resistant polystyrene construct, and method of making the construct. The construct is formed by molding pre-expanded non-equilibrated polystyrene beads to a first volume, cooling rapidly, and then compression molding to a final, smaller vo

An expanded, memory molded, increased density, highly impact-resistant polystyrene construct, and method of making the construct. The construct is formed by molding pre-expanded non-equilibrated polystyrene beads to a first volume, cooling rapidly, and then compression molding to a final, smaller volume. The resultant constructs have increased density, and high impact strength without increase in embrittlement. Also, the construct has "memory" in the sense that it returns substantially to its original shape after impact.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A layered expanded polystyrene bead construct comprising deformed hollow polystyrene beads, the beads of each layer fused to adjacent beads within the layer, and each layer fused t

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A layered expanded polystyrene bead construct comprising deformed hollow polystyrene beads, the beads of each layer fused to adjacent beads within the layer, and each layer fused to an adjacent layer in situ to form a continuous body of the construct, the layers each having a different density than another layer, and one of the layers of the body of the construct having a density at least about 200% greater than the density of pre-expanded hollow beads from which said construct was formed.