In order to test the tensile strength and elongation at break ofthe samples, five dumbbell-shaped test pieces were cut from eachof the MENR and MENR/CSt blend sheets and were dried. Theiraverage thickness was established and they were then attachedbetween the grips of a tensile strength tester (Strograph E-L, TOYO-SEIKI). The tensile strength and elongation at break of the sampleswere measured according to ASTM D412-98 at a crosshead speedof 500 mm/min with a load cell of 100 N. The modulus of the sam-ples was also determined according to JIS K6251 using the sametensile strength tester at the same crosshead speed with a load cellof 500 N.