# US 7,744,715 B2 · Fluororesin laminated film and method for producing same

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- Number: US 7,744,715 B2
- Document ID: US7744715B2
- Status: Granted
- Kind: B2
- Application number: 10/557,372
- Filed: 2004-05-14
- Published: 2006-12-28
- Granted: 2010-06-29
- Earliest claimed: 2003-05-14
- Assignees: Mitsubishi Plastics, Inc.
- Inventors: Yoshihiko Nishio
- Web page: https://patentgrep.com/patent/US7744715B2

## CPC

- B32B 27/20: using fillers, pigments, thixotroping agents
- B29C 48/18: the components being layers
- B32B 7/06: permitting easy separation
- B32B 27/08: of synthetic resin
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/36: comprising polyesters
- B29C 48/0017: {combined with blow-moulding or thermoforming}
- B29C 48/08: flexible, e.g. films
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2067/00: Use of polyesters {or derivatives thereof}, as moulding material
- B29L 2007/002: {Panels; Plates; Sheets}
- B32B 2250/03: 3 layers
- B32B 2250/24: All layers being polymeric
- B32B 2262/101: Glass fibres
- B32B 2264/104: Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
- B32B 2307/748: Releasability
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/3154: Of fluorinated addition polymer from unsaturated monomers
- Y10T 428/31544: Addition polymer is perhalogenated
- Y10T 428/31681: Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
- Y10T 428/31685: Natural source polyamide [e.g., casein, gelatin, etc.]
- Y10T 428/31688: Next to aldehyde or ketone condensation product
- Y10T 428/31692: Next to addition polymer from unsaturated monomers
- Y10T 428/31696: Including polyene monomers [e.g., butadiene, etc.]
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- Y10T 428/31938: Polymer of monoethylenically unsaturated hydrocarbon
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for producing a fluororesin-laminated film comprising the steps of co-extruding a fluororesin layer (1) and a resin layer (2) which can be peeled off from the fluororesin layer (1), and extrusion-laminating the co-extruded layers on at least one side of a drawn polyethylene terephthalate film while the co-extruded fluororesin layer (1) facing to the drawn polyethylene terephthalate.

## Claims

### Claim 1

A method for producing a fluororesin-laminated film comprising:
co-extruding a fluororesin layer having a thickness of from 2 μm to 10 μm that comprises tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer (THV) and a resin layer that can be peeled off from the fluororesin layer, and
extrusion-laminating the co-extruded layers on at least one side of a drawn polyethylene terephthalate film with the co-extruded fluororesin layer facing the drawn polyethylene terephthalate film so that an adhesion strength between the fluororesin layer and the drawn polyethylene terephthalate film, as determined in accordance with a 180-degree peeling test specified in the Japanese Industrial Standards Z-0237 at a pulling rate of 5 mm/min, is 4 N/cm or larger.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the resin layer comprises a filler to mat a surface of the fluororesin layer facing the resin layer.

### Claim 3 (depends on 1)

The method according to claim 1, wherein a fluororesin layer is also co-extruded between the resin layer and the fluororesin layer in said first step, which fluororesin layer comprises a fluororesin different from the fluororesin constituting the layer and can be peeled from the resin layer.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the resin layer comprises a filler to mat a surface of the fluororesin layer facing the resin layer.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the resin for the resin layer does not contain fluorine.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the resin which does not contain fluorine is polyethylene.

### Claim 7 (depends on 3)

The method according to claim 3, wherein the fluororesin layer comprises a resin selected from the group consisting of tetrafluoroethylene-ethylene copolymers, tetrafluoroethylene-hexafluoropropylene copolymers and a poly(vinylidene fluoride).

### Claim 8 (depends on 2)

The method according to claim 2, wherein the filler is at least one selected from the group consisting of glass fiber, mica and calcium carbonate.

### Claim 9 (depends on 2)

The method according to claim 2, wherein the filler has a particle size of from 1 μm to 1000 μm and is contained in an amount of from 5 wt % to 30 wt % based on a total weight of the resin layer.

### Claim 10 (depends on 5)

The method according to claim 5, wherein the resin layer has a thickness of from 8 μm to 20 μm.

### Claim 11 (depends on 4)

The method according to claim 4, wherein the filler is at least one selected from the group consisting of glass fiber, mica and calcium carbonate.

### Claim 12 (depends on 4)

The method according to claim 4, wherein the filler has a particle size of from 1 μm to 1000 μm and is contained in an amount of from 5 wt % to 30 wt % based on a total weight of the resin layer.