# US 2019/0315097 A1 · Deep-drawable film

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

- Number: US 2019/0315097 A1
- Document ID: US20190315097A1
- Status: Published application
- Kind: A1
- Application number: 16/314,678
- Filed: 2017-07-04
- Published: 2019-10-17
- Earliest claimed: 2016-07-04
- Assignees: Amcor Flexibles Rorschach AG
- Applicants: Amcor Flexibles Rorschach AG
- Inventors: Patrik Benz; Tony Malfait
- Web page: https://patentgrep.com/patent/US20190315097A1

## CPC

- B32B 15/08: of synthetic resin
- B32B 15/09: comprising polyesters
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/085: comprising polyolefins
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- 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 37/12: characterised by using adhesives
- B32B 2255/06: on metal layer
- B32B 2255/26: Polymeric coating
- B32B 2307/31: Heat sealable
- B32B 2307/4023: on the layer surface, e.g. ink
- B32B 2307/4026: within the layer by addition of a colorant, e.g. pigments, dyes
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2323/10: Polypropylene
- B32B 2439/40: Closed containers
- B32B 2439/70: Food packaging
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

Deep-drawable packaging film (60, 80, 93, 95) having an aluminum foil (10) as a core layer and comprising on an outer side of the aluminum foil (10) a semi-crystalline PET film (21, 25, 50) that is laminated to the aluminum foil (10) using an adhesive layer (40) and comprising on the other side of the aluminum foil (10) opposite to the PET film (21, 25, 50) a sealing layer (30, 35). The PET film (21, 25, 50) has a degree of crystallization between 20 and 70% and has a Young's modulus of 2000 MPa to 2700 MPa. The PET film (21, 25, 50) is a non-stretched film and the inner side of the PET film (21, 25, 50) directed to the aluminum foil (10) comprises a reverse printing (23).

## Claims

### Claim 1

Deep-drawable packaging film (60, 80, 93, 95) having an aluminum foil (10) as core layer and comprising on an outer side of the aluminum foil (10) a semi-crystalline PET film (21, 25, 50) having a degree of crystallization between 20 and 70% and having a Young's modulus of 2000 MPa to 2700 MPa that is laminated to the aluminum foil (10) using an adhesive layer (40), the deep-drawable packaging film (60, 80, 93, 95) further having a sealing layer (30, 35) on the other side of the aluminum foil (10) opposite to the PET film (21, 25, 50),
characterized in that
the PET film (21, 25, 50) is a non-stretched film and that the inner side of the PET film (21, 25, 50) directed to the aluminum foil (10) comprises a reverse printing (23).

### Claim 2 (depends on 1)

Deep-drawable packaging film according to claim 1, characterized in that the PET film (21, 25, 50) exhibits a strain level equal or above 2 strain % when stressed with 2 MPa at 90° C.

### Claim 3 (depends on 1, 2)

Deep-drawable packaging film according to claim 1 or 2, wherein the PET film (21, 25, 50) is either a reverse printed unpigmented or pigmented single layer PET film (20, 50) or a coextruded multilayer PET film (21) having an inner reverse printed and pigmented polymer layer (50) and an outer unpigmented polymer layer (25).

### Claim 4 (depends on 1, 2, 3)

Deep-drawable packaging film according to one of claims 1 to 3, wherein the degree of crystallization of the PET film (21, 25, 50) is between 20 and 40%, in particular between 23 and 30%.

### Claim 5 (depends on 1, 2, 3, 4)

Deep-drawable packaging film according to any one of claims 1 to 4, wherein the Young's modulus of the semi-crystalline PET film (21, 25, 50) is between 2100 MPa and 2300 MPa.

### Claim 6 (depends on 1, 2, 3, 4, 5)

Deep-drawable packaging film according to any one of claims 1 to 5, wherein the PET film (21, 25, 50) has a thickness of 8 to 40 μm, preferably 15 to 35 μm.

### Claim 7 (depends on 1, 2, 3, 4, 5, 6)

Deep-drawable packaging film according to any one of claims 1 to 6, wherein the sealing layer consists of a heat seal lacquer (35) preferably having a mass per square meter of 5 to 15 g/m2, in particular 8 to 12 g/m2.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7)

Deep-drawable packaging film according to any one of claims 1 to 7, wherein the sealing layer consists of a film (30) made of polypropylene (PP) that is glued to the aluminum foil (10) by an intermediate adhesive layer (45).

### Claim 9 (depends on 8)

Deep-drawable packaging film according to claim 8, wherein the polypropylene film (30) has a thickness of between 25 μm to 35 μm, preferably 28 μm to 32 μm.

### Claim 10 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9)

Deep-drawable packaging film according to any one of claims 1 to 9, wherein the adhesive layer/s (40, 45) has/have a mass per square meter of 3 g/m2 to 8 g/m2, preferably 4.5 g/m2 to 6 g/m2.

### Claim 11 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

Deep-drawable packaging film according to any one of claims 1 to 10, wherein the aluminum foil (10) is a soft annealed aluminum foil made of an AA8011A alloy having a thickness of between 80 to 120 μm.

### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)

Method for manufacturing a flat, deep-drawable packaging film (60, 80, 93, 95) according to any one of claims 1 to 11 for manufacturing cup-shaped capsules for packaging food or pharma products, characterized in that an aluminum foil (10), a semi-crystalline, non-stretched PET film (21, 25, 50), adhesives (40, 45) and a sealing lacquer (35) or a polypropylene film (30) are provided and the PET film (21, 25, 50) is provided with a reverse printing (23), wherein the PET film (21, 25, 50) has a degree of crystallization between 20 to 70% and has a Young's modulus of 2000 MPa to 2700 MPa, at least one side of the aluminum foil (10) or the reverse printed side of the PET film (20, 21, 50) is coated with the adhesive, the reverse printed side of the PET film (20, 21, 50) is then laminated to the aluminum foil (10) by the adhesive layer (40) and the surface of the aluminum foil (10) opposite to the semi-crystalline PET film (25, 50) is either coated with the heat seal lacquer (35), or the film made of polypropylene (PP) is laminated to said aluminum surface using the adhesive (45).

### Claim 13 (depends on 12)

Method according to claim 12, wherein the semi-crystalline PET film (21, 25, 50) is a single layer film (25, 50), or the PET film is a coextruded multilayer film (21) having an inner laying reverse printed pigmented layer (50).

### Claim 14 (depends on 12, 13)

Method according to claim 12 or 13, wherein the printing is distortion corrected relative to a subsequent deep-drawing process.