Provided is a method for producing a thermoplastic elastomer composition that involves using a twin-screw kneader to melt-knead a thermoplastic resin and an elastomer. The twin-screw kneader has at least two stock material inlets including a first stock material inlet, and a second stock material inlet that is provided to a position separated downstream by 15D-38D from the first stock material inlet, where D is the cylinder inner diameter of the twin-screw kneader. The elastomer is fed in a divided manner from the first and second stock material inlets, the proportion of the elastomer that is fed in from the second stock material inlet being 10-60 vol% of the total amount of elastomer. The elastomer is melt-kneaded in a kneading zone the length of which in the cylinder axis direction of the twin-screw kneader is 0.5D-20D, and one or more of the kneading zones is provided between the first and second stock material inlets and to the downstream side of the second stock material inlet.
Method for producing thermoplastic elastomer composition
2015-04-29
Patent
Elektronische Ressource
Englisch
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