The invention relates to a method for producing thin-walled small plastic parts having an average wall thickness of less than 1.5 mm, wherein the small plastic parts are produced in a plastic injection-molding method from polyethylene furanoate (PEF) having a viscosity of 0.3 dL/g to 0.7 dL/g, preferably less than 0.6 dL/g, measured according to a measurement method as per ASTM D4603, which polyethylene furanoate has a water content of less than 100 ppm in the plastic injection process.