Abstract: In one aspect there is provided a foam comprising: a polymeric matrix comprising polyethylene grafted polymerized siloxane, and a plurality of cells formed in the polymeric matrix and containing a blowing agent comprising carbon dioxide. In another aspect there is provided a method of making a foam comprising: grafting polymerized siloxane to polyethylene to form a grafted intermediate; molding the grafted intermediate to form a molded intermediate; and foaming the molded intermediate using high-pressure CO2 to form the foam, wherein the foam has a porosity greater than 75%.

Abstract: The invention provides a garbage can capable of compressing items contained in an internal space thereof. The garbage can comprises a can housing, wherein axially symmetrical openings are formed in a side wall at the upper end of the can housing; door sheets in fit sizes are arranged in the openings; the upper ends of the door sheets are articulated with the can housing; a compression device is arranged on the top surface in the can housing; a control end of the compression device is connected with an output end of a controller; an input end of the controller is connected with output ends of door opening sensing devices; the door opening sensing devices are arranged on the door sheets; and the controller compresses the items contained in the can housing to release the space according to door opening times detected by the door opening sensing devices.