Package for pellets of saponified ethylene-vinyl ester-based copolymer or resin composition thereof
View Patent ↗The purpose of the invention is to provide: a package for EVOH resin pellets which is capable of providing the EVOH resin pellets almost free from powder even in a case where the package contains the powder generated therein during transportation or the like after shipment; and EVOH resin pellets contaminated with very small amount of the powder in a case where a user uses the EVOH resin pellets as a molding material. A package, where pellets each having a substantially circular or oval cross-section are packed in a packaging container whose inner surface has a surface resistivity of 1.0×10 14 Ω or more, is capable of providing pellets to which 0.8 wt % or less of powder adhered relative to the weight of the pellets.
1. A package comprising pellets made of saponified ethylene-vinyl ester-based copolymer or resin composition thereof, and a packaging container in which the pellets are packed, wherein the inside surface of the packaging container has a surface resistivity of 1.0×10 14 Ω or more, the surface resistivity being measured according to JIS K6911 with respect to the inside surface of the packaging container after moisture conditioned by being placed for 24 hours in a bath where the constant condition of 23° C. and 50% RH being set, and wherein each of the pellets has no edge and an approximately circular or oval cross-section.
2. The package according to claim 1 , wherein the inside surface of the packaging container has a surface resistivity of 1.0×10 18 Ω or less.
3. The package according to claim 1 , wherein the packaging container is formed from a multilayer film.
4. The package according to claim 3 , wherein the multilayer film comprises an aluminum layer.
5. The package according to claim 4 , wherein a rate in thickness of the aluminum layer to the multilayer film is in the range of 3.0 to 10%.
6. The package according to claim 1 , further comprising powder in an amount of 0.0001 to 2.0 weight % based on the weight of the pellets of saponified ethylene-vinyl ester-based copolymer or resin composition thereof.
7. The package according to claim 6 , wherein the powder has a dimension passing through a 30 mesh sieve having an aperture of 500μm.
8. Pellets of saponified ethylene-vinyl ester-based copolymer or resin composition thereof, the pellets having been packed in the package of claim 1 , the pellets taken out from the package characterized by that the amount of powder attached to surface of the pellets is 0.8 weight % or less based on the weight of the pellets.
9. A method for reducing powder adhered to the surface of pellets made of saponified ethylene-vinyl ester-based copolymer or resin composition thereof, the pellets each having an approximately circular or oval cross-section and no edge, and the pellets obtained from a package therefor, characterized by that a packaging container for packing the pellets has an inside surface of surface resistivity of 1.0×10 10 Ω or more, the surface resistivity being measured according to JIS K6911with respect to the inside surface of the packaging container after moisture conditioned by being placed for 24 hours in a bath where the constant condition of 23 ° C. and 50% RH being set.
10. The method according to claim 9 , wherein the packaging container is formed from a multilayer film comprising an aluminum layer.