Molding material using saponified ethylene-vinyl ester-based copolymers
View Patent ↗Provided is a melt-molding material using saponified ethylene-vinyl ester-based copolymer (EVOH resin), and has excellent feed property during melt extrusion molding. The molding material consists of EVOH resin pellets comprising a first EVOH resin pellet having approximately circular or elliptical cross section and a second EVOH resin pellet having a cylindrical shape. The ratio in weight of the first EVOH resin pellet (A 1 ) to the second EVOH resin pellet (A 2 ), A 1 /A 2 , is from 99/1 to 20/80.
1. A molding material consisting of saponified ethylene-vinyl ester-based copolymer pellets, the pellets comprising a first saponified ethylene-vinyl ester-based copolymer pellet (A 1 ) having approximately circular or elliptical cross section, and a second saponified ethylene-vinyl ester-based copolymer pellet (A 2 ) having a cylindrical shape,
wherein the ratio (A 1 /A 2 ) in weight of the first saponified ethylene-vinyl ester-based copolymer pellet (A 1 ) to the second saponified ethylene-vinyl ester-based copolymer pellet (A 2 ) is from 99/1 to 20/80.
2. The molding material according to claim 1 , wherein the first saponified ethylene-vinyl ester-based copolymer pellet has a cross-section of appropriate circle or ellipse having major axis of 3.0 to 6.0 mm and minor axis of 2.5 to 6.0 mm.
3. The molding material according to claim 1 , wherein the second saponified ethylene-vinyl ester-based copolymer pellet has 1.5 to 4.0 mm in diameter of its circular bottom face and 1.5 to 4.0 mm in height.
4. The molding material according to claim 1 , having an angle of repose less than 37° of a conical pile of the pellets formed by pouring the pellets to a circular container having 9.5 cm in diameter through a funnel having 8 mm in diameter of its tip.
5. The molding material according to claim 1 , wherein the first saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %, and the second saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %.
6. The molding material according to claim 2 , wherein the second saponified ethylene-vinyl ester-based copolymer pellet has 1.5 to 4.0 mm in diameter of its circular bottom face and 1.5 to 4.0 mm in height.
7. The molding material according to claim 6 , having an angle of repose less than 37° of a conical pile of the pellets formed by pouring the pellets to a circular container having 9.5 cm in diameter through a funnel having 8 mm in diameter of its tip.
8. The molding material according to claim 7 , wherein the first saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %, and the second saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %.
9. The molding material according to claim 3 , wherein the second saponified ethylene-vinyl ester-based copolymer pellet has 1.5 to 4.0 mm in diameter of its circular bottom face and 1.5 to 4.0 mm in height.
10. The molding material according to claim 9 , having an angle of repose less than 37° of a conical pile of the pellets formed by pouring the pellets to a circular container having 9.5 cm in diameter through a funnel having 8 mm in diameter of its tip.
11. The molding material according to claim 10 , wherein the first saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %, and the second saponified ethylene-vinyl ester-based copolymer pellet has an ethylene unit content of 20 to 60 mol %.
12. The molding material according to claim 1 , wherein the first saponified ethylene-vinyl ester-based copolymer pellet is hot-cut pellet and the second saponified ethylene-vinyl ester-based copolymer pellet is strand-cut pellet.