Ethylene-vinyl alcohol copolymer composition
AssigneeMitsubishi Chemical Corporation
InventorsKota Inoue, Daichi Morita
Life of this patent
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Abstract
An ethylene-vinyl alcohol copolymer composition that contains an ethylene-vinyl alcohol copolymer (A), an unmodified polyolefin (B), and an acid-modified polyolefin (C). The mass ratio [(B)/(C)] between the unmodified polyolefin (B) and the acid-modified polyolefin (C) is 75/25 to 1/99. The melt viscosity ratio [(η1)/(η2)] between the melt viscosity (η1) of the composition at 210° C. and a shear rate of 18 (sec−1) and the melt viscosity (η2) of the composition at 210° C. and a shear rate of 365 (sec−1) is 5.6 or more. The mass ratio [(A)/((B)+(C))] between the ethylene-vinyl alcohol copolymer (A) and the total content of the unmodified polyolefin (B) and the acid-modified polyolefin (C) is 60/40 or more and less than 75/25.
Claims10
An ethylene-vinyl alcohol copolymer composition comprising:
- an ethylene-vinyl alcohol copolymer (A);
- an unmodified polyolefin (B);
- and
- an acid-modified polyolefin (C),
- wherein a mass ratio [(B)/(C)] between the unmodified polyolefin (B) and the acid-modified polyolefin (C) is 75/25 to 1/99,
- a melt viscosity ratio [(η1)/(η2)] between a melt viscosity (η1) of the composition at 210° C. and a shear rate of 18 (sec−1) and a melt viscosity (η2) of the composition at 210° C. and a shear rate of 365 (sec−1) is 5.6 or greater, and
- a mass ratio [(A)/((B)+(C))] between the ethylene-vinyl alcohol copolymer (A) and a total content of the unmodified polyolefin (B) and the acid-modified polyolefin (C) is 60/40 or more and less than 75/25.
Dependencies are inferred from the claim text.