# US 12,214,571 B2 · Molding packaging material, power storage device packaging case, and power storage device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,214,571 B2
- Document ID: US12214571B2
- Status: Granted
- Kind: B2
- Application number: 18/231,487
- Filed: 2023-08-08
- Published: 2023-11-30
- Granted: 2025-02-04
- Earliest claimed: 2017-09-06
- Assignees: Resonac Packaging Corporation
- Applicants: Showa Denko Packaging Co., Ltd.
- Inventors: Kenji Yoshino; Makoto Karatsu; Takashi Nagaoka
- Web page: https://patentgrep.com/patent/US12214571B2

## CPC

- B32B 15/085: comprising polyolefins
- C08L 23/00: Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/08: of synthetic resin
- 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 27/00: Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)}
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 37/12: characterised by using adhesives
- B32B 38/0036: {Heat treatment (for heating or cooling of layers during lamination B32B37/06, B32B37/08)}
- 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)}
- C08L 23/12: Polypropene
- H01G 11/78: Cases; Housings; Encapsulations; Mountings
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 50/105: Pouches or flexible bags
- H01M 50/202: Casings or frames around the primary casing of a single cell or a single battery
- H01M 50/231: having a layered structure
- B32B 2264/102: Oxide or hydroxide
- B32B 2307/30: having particular thermal properties
- B32B 2307/31: Heat sealable
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7265: Non-permeable
- B32B 2307/732: Dimensional properties
- B32B 2439/70: Food packaging
- B32B 2439/80: Medical packaging
- B32B 2457/10: Batteries
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- B32B 2605/00: Vehicles
- Y02E 60/10: Energy storage using batteries
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A molding packaging material is capable of ensuring good slipperiness to secure good formability when molding the molding packaging material and is less likely to cause white powder on a surface of the packaging material. The molding packaging material includes a substrate layer as an outer layer, a heat fusible resin layer as an inner layer, and a metal foil layer arranged between the two layers. The heat fusible resin layer is composed of a single layer or a multi-layer. The innermost layer of the heat fusible resin layer is made of a resin composition containing a heat fusible resin, an anti-blocking agent, a slip agent, and a fluoropolymer-based lubricant.

## Claims

### Claim 1

A molding packaging material comprising:
a substrate layer as an outer layer;
a heat fusible resin layer as an inner layer; and
a metal foil layer arranged between the substrate layer and the heat fusible resin layer,
wherein the heat fusible resin layer is composed of a single layer or a multi-layer,
wherein an innermost layer of the heat fusible resin layer is made of a resin composition containing a heat fusible resin, a roughening material, a slip agent, and a fluoropolymer-based lubricant,
wherein the roughening material contains a thermoplastic resin, and
wherein a first lubricative layer containing the fluoropolymer-based lubricant in a content rate greater than 50 mass % is formed on an inner surface of the innermost layer.

### Claim 2 (depends on 1)

The molding packaging material as recited in claim 1,
wherein the fluoropolymer-based lubricant comprises a fluorine resin, which does not include elastomers, having a melting point falling within the range of 100° C. to 300° C.

### Claim 3 (depends on 1)

The molding packaging material as recited in claim 1,
wherein the fluoropolymer-based lubricant comprises a fluoroelastomer lubricant and a fluorine resin lubricant, which does not include elastomers.

### Claim 4 (depends on 1)

The molding packaging material as recited in claim 1,
wherein a content rate of the fluoropolymer-based lubricant in the innermost layer is 50 ppm to 3,000 ppm.

### Claim 5 (depends on 1)

The molding packaging material as recited in claim 1,
wherein the fluoropolymer-based lubricant is one or two fluoropolymer-based lubricants selected from the group consisting of a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer and a hexafluoropropylene-vinylidene fluoride copolymer.

### Claim 6 (depends on 1)

The molding packaging material as recited in claim 1,
wherein the resin composition of the innermost layer of the heat fusible resin layer further contains an anti-blocking agent.

### Claim 7 (depends on 1)

A power storage device packaging case composed of a molded article of a molding packaging material as recited in claim 1.

### Claim 8 (depends on 7)

A power storage device comprising:
a power storage device main parts; and
an external material including at least the power storage device packaging case as recited in claim 7,
wherein the power storage device main parts is packaged with the external material.