# US 2020/0399434 A1 · Method for producing flexible-packaging film

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- Number: US 2020/0399434 A1
- Document ID: US20200399434A1
- Status: Published application
- Kind: A1
- Application number: 16/975,535
- Filed: 2019-02-14
- Published: 2020-12-24
- Earliest claimed: 2018-02-27
- Assignees: DIC Corporation
- Applicants: DIC Corporation
- Inventors: Kiyomi Hata; Shigekazu Takahashi
- Web page: https://patentgrep.com/patent/US20200399434A1

## CPC

- C08G 18/246: {containing also tin-carbon bonds}
- C08J 5/18: Manufacture of films or sheets
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- 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 15/12: of paper or cardboard
- 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 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/281: {comprising polyimides}
- B32B 27/285: {comprising polyethers}
- B32B 27/286: {comprising polysulphones; polysulfides}
- 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 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- 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 27/365: {comprising polycarbonates}
- B32B 27/40: comprising polyurethanes
- B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
- B32B 37/12: characterised by using adhesives
- 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)}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/16: Catalysts (catalysts in general B01J)
- C08G 18/168: {Organic compounds}
- C08G 18/227: {of antimony, bismuth or arsenic}
- C08G 18/36: Hydroxylated esters of higher fatty acids
- C08G 18/3819: {having nitrogen}
- C08G 18/48: Polyethers
- C08G 18/4825: {Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/4829: {Polyethers containing at least three hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/5024: {containing primary and/or secondary amino groups}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C09J 5/04: involving separate application of adhesive ingredients to the different surfaces to be joined
- C09J 175/04: Polyurethanes
- B32B 2250/02: 2 layers
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/205: Metallic coating
- B32B 2255/26: Polymeric coating
- B32B 2307/518: bi-axially
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- C09J 2301/204: the adhesive coating being discontinuous
- C09J 2475/00: Presence of polyurethane
- Y02W 90/10: Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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)
- 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
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A method for producing a flexible-packaging film in which a first substrate and a second substrate are laminated with a reactive adhesive of a polyisocyanate composition (X) and a polyol composition (Y) therebetween includes a two-component separate application step in which a liquid mixture applied to the first substrate and including the polyisocyanate composition (X) and the polyol composition (Y), and a catalyst (Z) formed in a dot pattern on the second substrate are brought into contact with each other to achieve contact-bonding together. The substrates are preferably plastic films, metal vapor-deposition films, or metal foils. As the second substrate, a non-oriented film is preferably employed.

## Claims

### Claim 1

A method for producing a flexible-packaging film in which a first substrate and a second substrate are laminated with a reactive adhesive of a polyisocyanate composition (X) and a polyol composition (Y) therebetween, the method comprising:
a two-component separate application step in which a liquid mixture applied to the first substrate and including the polyisocyanate composition (X) and the polyol composition (Y), and
a catalyst (Z) formed in a dot pattern on the second substrate are brought into contact with each other to achieve contact-bonding together.

### Claim 2 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the substrates are plastic films, metal vapor-deposition films, or metal foils.

### Claim 3 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein, as the second substrate, a non-oriented film is employed.

### Claim 4 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the first substrate and the second substrate are contact-bonded together using a nip roll.

### Claim 5 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein a ratio of a mass of the catalyst (Z) to a mass of the liquid mixture defined as 100, the liquid mixture being applied to the first substrate and including the polyisocyanate composition (X) and the polyol composition (Y), is in a range of 0.5 to 67.

### Claim 6 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the polyol composition (Y) contains at least one polyol selected from the group consisting of polyester polyol, polyester urethane polyol, polyether urethane polyol, polyether polyol, and castor oil-based polyol.

### Claim 7 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the polyol composition (Y) contains at least one polyol selected from the group consisting of polyester polyol, polyester urethane polyol, polyether urethane polyol, polyether polyol, and castor oil-based polyol, and a tertiary amine compound (B) having a plurality of hydroxyl groups.

### Claim 8 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the reactive adhesive has an amine value in a range of 0.5 to 40 mgKOH/g.

### Claim 9 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein a ratio of a mass of the polyol composition (Y) to a mass of the polyisocyanate composition (X) defined as 100 is in a range of 10 to 150.

### Claim 10 (depends on 1)

The method for producing a flexible-packaging film according to claim 1, wherein the catalyst (Z) includes at least one catalyst selected from metal-based catalysts, amine-based catalysts, diazabicycloundecene-based catalysts, aliphatic cyclic amide compounds, and titanium chelate complexes.