The present invention relates to a novel water-disintegrable environment-friendly macromolecular material formed by blending water absorbent resin particles into polymers, such as
polystyrene. Said material will disintegrate into
powder or lose its intensity at a certain rate in the presence of water. The present invention also relates to two kinds of processes for preparing said material. The first process is called blending-
polymerization process, wherein water absorbent resin particles with particle size not more than 5 μm, together with an initiator, are added into one or more monomers, such as
styrene, to carry out
polymerization. The second process is called reverse-phase
emulsion polymerization process, wherein a W / O
emulsion was firstly formed by agitating a mixture of one or more oil-soluble monomers, such as
styrene, one or more water-soluble monomers that will form water-absorbent
polymer after polymerization, such as
sodium acrylate and
methylene bisacrylamide, water, initiators and a W / O emulsifer, and then a polymerization was carried out. The material of the present invention has advantages that its preparation involves low cost, and its water-disintegrating rate is controllable. The material of the present invention can be used to replace the currently used foamed
polystyrene type packing materials, especially the packing materials for disposable
meal boxes, which are pollutive and difficult to be recycled and degraded.