Method of melt kneading, extrudate, and transparent resin material

A melting and kneading method for producing a compatible nanostructured resin, wherein dispersed phases are uniformly dispersed in a matrix resin, comprising:

• a supplying step of supplying at least two incompatible resins from a material supplying part into a melting and kneading part which includes a cylinder, a screw, the material supplying part and a heating part, wherein the at least two incompatible resins include at least a first resin and a second resin;
• and
• a melting and kneading step to make the compatible nanostructured resin by melting and kneading the incompatible resins, in which the melted and kneaded resin is fed from a rear end of the screw to a front end thereof and trapped in a gap formed in the front end of the screw and then, returned from the gap to the rear end of the screw, wherein
• a rotation speed of the screw is set into a range from 600 rpm to 3000 rpm, and a shear rate of the screw is set into a range from 900 to 4500 sec−1, wherein the dispersed phases have sizes of 300 nm or less, and wherein
• the first resin has a polycarbonate of 97 to 3 weight % and the second resin has a methacryl-based resin of 3 to 97 weight %.

A melting and kneading method for producing a compatible nanostructured resin, wherein dispersed phases are uniformly dispersed in a matrix resin, comprising:

• a supplying step of supplying at least two incompatible resins from a material supplying part into a melting and kneading part which includes a cylinder, a screw, the material supplying part, a heating part and a seal, wherein the at least two incompatible resins include at least a first resin and a second resin;
• and
• a melting and kneading step to make the compatible nanostructured resin by melting and kneading the incompatible resins, in which the resin is fed from a rear end of the screw to a front end thereof and trapped in a gap formed in the front end of the screw and then, returned from the gap to the rear end of the screw, wherein
• a gap formed between a tip end surface of the screw and a sealing surface opposed to the tip end surface is set into a range from 0 to 5 mm, an inner diameter of a hole of the screw is set into a range from 1 mm to 5 mm, and a rotation speed of the screw is set into a range from 600 rpm to 3000 rpm, a shear rate is set into a range from 900 to 4500 sec−1, and the first resin is heated to a temperature higher than a glass transition point when the resin is amorphous resin, and the first resin is heated to a temperature higher than a melting point of crystalline resin when the first resin is crystalline resin, wherein the dispersed phases have sizes of 300 nm or less, and wherein
• the first resin has a polycarbonate of 97 to 3 weight % and the second resin has a mathacryl-based resin of 3 to 97 weight %.