# US 10,308,732 B2 · Package for pellets of saponified ethylene-vinyl ester-based copolymer or resin composition thereof

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- Number: US 10,308,732 B2
- Document ID: US10308732B2
- Status: Granted
- Kind: B2
- Application number: 15/324,080
- Filed: 2015-07-21
- Published: 2017-07-13
- Granted: 2019-06-04
- Earliest claimed: 2014-07-29
- Assignees: The Nippon Synthetic Chemical Industry Co., Ltd.
- Applicants: The Nippon Synthetic Chemical Industry Co., Ltd.
- Inventors: Ikko Matsui
- Web page: https://patentgrep.com/patent/US10308732B2

## CPC

- B29B 9/16: Auxiliary treatment of granules
- C08F 6/28: Purification
- B29B 9/12: characterised by structure or composition
- B32B 5/022: {Non-woven fabric}
- B32B 5/024: {Woven fabric}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 15/082: comprising vinyl resins; comprising acrylic resins
- B32B 15/085: comprising polyolefins
- B32B 15/088: comprising polyamides
- B32B 15/09: comprising polyesters
- B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)}
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)}
- B32B 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 29/002: {as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10)}
- B32B 29/005: {next to another layer of paper or cardboard layer}
- B65D 65/38: Packaging materials of special type or form
- B65D 65/40: Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)}
- B65D 85/70: {for materials not otherwise provided for}
- C08J 3/12: Powdering or granulating
- B29B 9/06: in the form of filamentary material, e.g. combined with extrusion
- B29B 9/065: {under-water, e.g. underwater pelletizers}
- B29B 2009/168: {Removing undesirable residual components, e.g. solvents, unreacted monomers; Degassing}
- B32B 2250/02: 2 layers
- B32B 2250/03: 3 layers
- B32B 2250/04: 4 layers
- B32B 2250/05: 5 or more layers
- B32B 2255/02: on fibrous or filamentary layer
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/12: on paper layer
- B32B 2255/205: Metallic coating
- B32B 2255/26: Polymeric coating
- B32B 2307/20: having particular electrical or magnetic properties, e.g. piezoelectric
- B32B 2307/202: Conductive
- B32B 2307/206: Insulating
- B32B 2307/31: Heat sealable
- B32B 2307/7246: Water vapor barrier
- B32B 2307/732: Dimensional properties
- B32B 2307/744: Non-slip, anti-slip
- B32B 2439/00: Containers; Receptacles
- B32B 2439/46: Bags
- B32B 2439/62: Boxes, cartons, cases
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- B65D 2213/02: Means for preventing buil-up of electrostatic charges
- C08J 2329/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

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 1.0×1014Ω or more, is capable of providing pellets to which 0.8 wt % or less of powder adhered relative to the weight of the pellets.

## Claims

### Claim 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 1.0×1014Ω 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.

### Claim 2 (depends on 1)

The package according to claim 1, wherein the inside surface of the packaging container has a surface resistivity of 1.0×1018Ω or less.

### Claim 3 (depends on 1)

The package according to claim 1, wherein the packaging container is formed from a multilayer film.

### Claim 4 (depends on 3)

The package according to claim 3, wherein the multilayer film comprises an aluminum layer.

### Claim 5 (depends on 4)

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%.

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 6)

The package according to claim 6, wherein the powder has a dimension passing through a 30 mesh sieve having an aperture of 500μm.

### Claim 8 (depends on 1)

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.

### Claim 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 1.0×1010Ω 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.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the packaging container is formed from a multilayer film comprising an aluminum layer.