# US 11,993,063 B2 · Transparent resin film, transparent resin film production method, and decorative material

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- Number: US 11,993,063 B2
- Document ID: US11993063B2
- Status: Granted
- Kind: B2
- Application number: 17/603,120
- Filed: 2020-03-19
- Published: 2022-04-21
- Granted: 2024-05-28
- Earliest claimed: 2019-04-18
- Assignees: Dai Nippon Printing Co., Ltd.
- Applicants: Dai Nippon Printing Co., Ltd.
- Inventors: Ryo Fujii; Satoshi Furuta; Yoshiaki Netsu; Tomomi Nakajima; Yosuke Sumida
- Web page: https://patentgrep.com/patent/US11993063B2

## CPC

- B29C 59/04: using rollers or endless belts
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B29C 48/0021: {combined with joining, lining or laminating}
- B29C 48/08: flexible, e.g. films
- B29C 48/154: Coating solid articles, i.e. non-hollow articles
- B29C 48/21: the layers being joined at their surfaces
- B29C 48/305: having a wide opening, e.g. for forming sheets
- B29C 48/88: Thermal treatment of the stream of extruded material, e.g. cooling
- B29C 59/046: {for layered or coated substantially flat surfaces}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 21/02: {the layer being formed} of fibres, chips, or particles {, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard}
- B32B 21/08: of synthetic resin
- B32B 27/08: of synthetic resin
- B32B 27/16: specially treated, e.g. irradiated
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B29C 2059/023: {Microembossing}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/26: Polymeric coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2264/1021: Silica
- B32B 2307/3065: Flame resistant or retardant, fire resistant or retardant
- B32B 2307/412: Transparent
- B32B 2307/732: Dimensional properties
- B32B 2451/00: Decorative or ornamental articles
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The invention provides a transparent resin film that has a smooth surface on a side to be laminated on a substrate to prevent entering of air bubbles when bonded to a substrate and has a pattern of protrusions and depressions on a side opposite to the side to be laminated on a substrate to provide high design quality, a method for producing the transparent resin film, and a decorative material. The invention relates to a transparent resin film to be laminated on a substrate including a picture layer, the transparent resin film having a pattern of protrusions and depressions with a maximum height Rz of 20 μm or higher and 200 μm or lower on a side opposite to a side to be laminated on the substrate, the transparent resin film having a maximum height Rz of 20 μm or lower on the side to be laminated on the substrate.

## Claims

### Claim 1

A transparent resin film to be laminated on a substrate including a picture layer,
the transparent resin film having a pattern of protrusions and depressions with a maximum height Rz (1) defined in JIS B 0601 (2001) of 20 μm or higher and 200 μm or lower on a side opposite to a side to be laminated on the substrate,
the transparent resin film having a maximum height Rz (2) defined in JIS B 0601 (2001) of 15 μm or lower on the side to be laminated on the substrate.

### Claim 2 (depends on 1)

The transparent resin film according to claim 1, comprising at least multiple transparent resin layers.

### Claim 3 (depends on 1)

The transparent resin film according to claim 1, comprising a surface protective layer on the side opposite to the side to be laminated on the substrate.

### Claim 4 (depends on 1)

The transparent resin film according to claim 1, containing a flame retardant.

### Claim 5 (depends on 4)

The transparent resin film according to claim 4,
wherein a layer containing the flame retardant in the transparent resin film contains a filler.

### Claim 6 (depends on 3)

The transparent resin film according to claim 3,
wherein the surface protective layer contains a flame retardant.

### Claim 7 (depends on 4)

The transparent resin film according to claim 4,
wherein the flame retardant is at least one selected from the group consisting of a phosphinic acid metal salt-based flame retardant, a phosphazene-based flame retardant, and a NOR hindered amine-based flame retardant.

### Claim 8

A method for producing a transparent resin film to be laminated on a substrate including a picture layer, the method comprising:
laminating multiple transparent resin layers by thermal lamination to provide a laminate while embossing a side of the laminate opposite to a side to be laminated on the substrate to form a pattern of protrusions and depressions having a maximum height Rz (1) defined in JIS B 0601 (2001) of 20 μm or higher and 200 μm or lower on the side opposite to the side to be laminated on the substrate,
the transparent resin film having a maximum height Rz (2) defined in JIS B 0601 (2001) of 15 μm or lower on the side to be laminated on the substrate.

### Claim 9 (depends on 8)

The method for producing a transparent resin film according to claim 8,
wherein the embossing is performed using a press roll having a type D durometer hardness defined in JIS K 6253-3 (2012) of 25 or more and 50 or less.

### Claim 10 (depends on 1)

A decorative material comprising:
a substrate including a picture layer; and
the transparent resin film according to claim 1 laminated on the substrate.

### Claim 11 (depends on 2)

The transparent resin film according to claim 2, comprising a surface protective layer on the side opposite to the side to be laminated on the substrate.

### Claim 12 (depends on 2)

The transparent resin film according to claim 2, containing a flame retardant.

### Claim 13 (depends on 3)

The transparent resin film according to claim 3, containing a flame retardant.

### Claim 14 (depends on 12)

The transparent resin film according to claim 12,
wherein a layer containing the flame retardant in the transparent resin film contains a filler.

### Claim 15 (depends on 13)

The transparent resin film according to claim 13,
wherein a layer containing the flame retardant in the transparent resin film contains a filler.

### Claim 16 (depends on 11)

The transparent resin film according to claim 11,
wherein the surface protective layer contains a flame retardant.

### Claim 17 (depends on 5)

The transparent resin film according to claim 5,
wherein the flame retardant is at least one selected from the group consisting of a phosphinic acid metal salt-based flame retardant, a phosphazene-based flame retardant, and a NOR hindered amine-based flame retardant.

### Claim 18 (depends on 6)

The transparent resin film according to claim 6,
wherein the flame retardant is at least one selected from the group consisting of a phosphinic acid metal salt-based flame retardant, a phosphazene-based flame retardant, and a NOR hindered amine-based flame.

### Claim 19 (depends on 2)

A decorative material comprising:
a substrate including a picture layer; and
the transparent resin film according to claim 2 laminated on the substrate.

### Claim 20 (depends on 3)

A decorative material comprising:
a substrate including a picture layer; and
the transparent resin film according to claim 3 laminated on the substrate.