Method of producing composition comprising thermoplastic resin and rubber

Abstract

Provided is a method of producing a composition comprising a thermoplastic resin and a rubber, wherein a solid rubber is molten by a rubber kneading machine and fed into an extruder, and the molten rubber is melt-kneaded with the thermoplastic resin in the extruder. The composition has a uniform component ratio and excellent moldability, and can be used widely as raw materials of molded articles, sheets, films and containers.

1 . An extruding equipment, which is used for melt-kneading a thermoplastic resin and a rubber to produce a composition, comprising: 
 a rubber kneading machine for melting and kneading a solid rubber; and    a main extruder having a resin feeding portion for feeding the thermoplastic resin and a rubber feeding portion for feeding a molten rubber from the rubber kneading machine, which is for melt-kneading the thermoplastic resin and the molten rubber to produce the composition;    wherein the rubber kneading machine comprises a hopper having a pair of intermeshing screws for kneading and charging the solid rubber into a rubber feeder, and the rubber feeder for further kneading the rubber into a molten state to be fed into the main extruder.    
   
   
       2 . The extruding equipment according to  claim 1 , wherein the resin feeding portion is located at a downstream position of the main extruder compared with the rubber feeding portion.  
   
   
       3 . The extruding equipment according to  claim 1 , wherein a filter for removing undesired foreign materials contained in the molten rubber is provided at a tip portion of the rubber feeder.  
   
   
       4 . The extruding equipment according to  claim 3 , wherein the mesh screen of the filter is 150 or more.  
   
   
       5 . The extruding equipment according to  claim 2 , wherein a filter for removing undesired foreign materials contained in the molten rubber is provided at a tip portion of the rubber feeder.