# US 12,179,977 B2 · Film for food packaging, stretch film for food packaging, film for automatic packaging machine for food packaging, and method for packaging food

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

- Number: US 12,179,977 B2
- Document ID: US12179977B2
- Status: Granted
- Kind: B2
- Application number: 17/116,017
- Filed: 2020-12-09
- Published: 2021-03-25
- Granted: 2024-12-31
- Earliest claimed: 2018-06-15
- Assignees: Mitsubishi Chemical Corporation
- Applicants: Mitsubishi Chemical Corporation
- Inventors: Kazuya Tanaka; Yasuharu Amakasu
- Web page: https://patentgrep.com/patent/US12179977B2

## CPC

- B65D 65/38: Packaging materials of special type or form
- B65B 11/00: Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material (bundling articles by applying narrow strips or bands of flexible material B65B13/00)
- B65B 41/12: Feeding webs from rolls
- B65D 65/02: Wrappers or flexible covers
- C08K 5/07: Aldehydes; Ketones
- C08K 5/103: with polyalcohols
- C08L 27/06: Homopolymers or copolymers of vinyl chloride
- C08L 71/02: Polyalkylene oxides
- 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
- B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A film for food packaging includes a resin composition comprising a vinyl chloride-based resin (A); a plasticizer (B); and an anti-fogging agent (C), wherein the composition comprises 1.5 parts by mass to 4.0 parts by mass of a diglycerin ester, 0.1 part by mass to 1.5 parts by mass of a glycerin monoester, and 0.1 part by mass to 3.0 parts by mass of an ethylene oxide adduct as the anti-fogging agent (C) relative to 100 parts by mass of the vinyl chloride-based resin (A).

## Claims

### Claim 1

A film for food packaging, the film comprising a resin composition comprising: a vinyl chloride-based resin (A); a plasticizer (B); and an anti-fogging agent (C), comprising relative to 100 parts by mass of the vinyl chloride-based resin (A):
2.4 parts by mass to 4.0 parts by mass of a diglycerin ester,
0.1 part by mass to 1.5 parts by mass of a glycerin monoester, and
0.1 part by mass to 3.0 parts by mass of an ethylene oxide adduct.

### Claim 2 (depends on 1)

The film for food packaging according to claim 1, wherein the resin composition further comprises 0.01 part by mass to 1.0 part by mass of a β-diketone compound (D) relative to 100 parts by mass of the vinyl chloride-based resin (A).

### Claim 3 (depends on 1)

The film for food packaging according to claim 1, wherein the plasticizer (B) comprises at least one of an aliphatic dibasic acid ester compound or an epoxidized vegetable oil.

### Claim 4 (depends on 1)

The film for food packaging according to claim 1, wherein the resin composition further comprises a Ca—Zn-based stabilizer as a heat stabilizer (E).

### Claim 5 (depends on 1)

The film for food packaging according to claim 1, wherein an unrolling force per film width of 350 mm is 80 gf or more and 150 gf or less.

### Claim 6 (depends on 1)

A stretch film for food packaging, comprising the film for food packaging according to claim 1.

### Claim 7 (depends on 1)

A film for an automatic packaging machine for food packaging, comprising the film for food packaging according to claim 1.

### Claim 8 (depends on 6)

A film for an automatic packaging machine for food packaging, comprising the stretch film for food packaging according to claim 6.

### Claim 9

A method for packaging food using a film for food packaging comprising: a vinyl chloride-based resin (A); a plasticizer (B); and an anti-fogging agent (C), comprising relative to 100 parts by mass of the vinyl chloride-based resin (A):
2.4 parts by mass to 4.0 parts by mass of a diglycerin ester,
0.1 part by mass to 1.5 parts by mass of a glycerin monoester, and
0.1 part by mass to 3.0 parts by mass of an ethylene oxide adduct,
the method comprising:
forming the film for food packaging in a form of a roll having a width of 200 mm to 800 mm;
loading the roll into an automatic packaging machine and unwinding the film in the form of the roll at a speed of 300 mm/second to 2,000 mm/second from the automatic packaging machine; and
packaging food or a container containing food by wrapping the unwound film for food packaging around the food or the container containing food.