# US 2017/0290182 A1 · Screen protector for a mobile electronic device with a touch screen

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- Number: US 2017/0290182 A1
- Document ID: US20170290182A1
- Status: Published application
- Kind: A1
- Application number: 15/479,050
- Filed: 2017-04-04
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: Tech 21 Licensing Limited
- Applicants: Tech 21 Licensing Limited
- Inventors: Jason ROBERTS; Wilhelm MARSCHALL; Benjamin THORPE
- Web page: https://patentgrep.com/patent/US20170290182A1

## CPC

- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/06: permitting easy separation
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/36: comprising polyesters
- B32B 27/40: comprising polyurethanes
- C09J 7/29: Laminated material (metallised plastics C09J7/22)
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- H05K 5/03: Covers
- B32B 2250/05: 5 or more layers
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2274/00: Thermoplastic elastomer material
- B32B 2307/558: Impact strength, toughness
- B32B 2307/56: Damping, energy absorption
- B32B 2307/584: Scratch resistance
- B32B 2307/732: Dimensional properties
- B32B 2307/748: Releasability
- B32B 2457/208: Touch screens
- B32B 2571/00: Protective equipment
- C09J 2203/318: for the production of liquid crystal displays
- C09J 2301/162: the carrier being a laminate constituted by plastic layers only
- C09J 2301/312: parameters being the characterizing feature
- C09J 2467/006: in the substrate
- C09J 2475/006: in the substrate
- G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]}
- G06F 3/0393: {Accessories for touch pads or touch screens, e.g. mechanical guides added to touch screens for drawing straight lines, hard keys overlaying touch screens or touch pads}
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A screen protector (5) for a mobile electronic device with a touch screen. The screen protector comprises a flat laminated film comprising a layer (2) of polyethylene terephthalate (PET) bonded to one face of a layer (3) of thermoplastic urethane (TPU) and a layer (4) of adhesive on the opposite side of the TPU layer. The PET layer is less than 50 μm thick and wherein the adhesive layer provides a tack force of greater than 5 g/cm2. The relatively thin layer of PET with the relatively high tack force adhesive provides a screen protector particularly suited to a device with a curved screen.

## Claims

### Claim 1

A screen protector for a mobile electronic device with a touch screen, the screen protector comprising a flat laminated film comprising a layer of polyethylene terephthalate (PET) bonded to one face of a layer of thermoplastic urethane (TPU) and a layer of adhesive on the opposite side of the TPU layer; wherein the PET layer is less than 50 μm thick and wherein the adhesive layer provides a tack force of greater than 5 g/cm2.

### Claim 2 (depends on 1)

A screen protector according to claim 1, wherein the PET layer is less than 40 μm thick.

### Claim 3 (depends on 1)

A screen protector according to claim 1, wherein the PET layer is less than a half of the thickness of the TPU layer.

### Claim 4 (depends on 2)

A screen protector according to claim 2, wherein the PET layer is less than a third of the thickness of the TPU layer.

### Claim 5 (depends on 1)

A screen protector according to claim 1, wherein the PET layer is less than twice the thickness of the adhesive layer and is preferably less than 1.5 times the thickness of the adhesive layer and most preferably less than the thickness of the adhesive layer.

### Claim 6 (depends on 1)

A screen protector according to claim 1, wherein the thickness of the TPU is greater than two thirds of the total film thickness.

### Claim 7 (depends on 1)

A screen protector according to claim 1, wherein the film thickness is less than 250 μm and is preferably less than 220 μm.

### Claim 8 (depends on 1)

A screen protector according to claim 1, wherein the tack force is greater than 6 g/cm2 and is more preferably greater than 7 g/cm2.

### Claim 9 (depends on 1)

A screen protector according to claim 1 further comprising a second PET layer between the TPU layer and the adhesive.

### Claim 10 (depends on 1)

A combination of a screen protector according to claim 1, a first release layer removable to expose the layer of adhesive prior to application of the protector to the device, and a second release layer is removable to expose the top surface of the screen protector once the protector has been applied to the device such that it protects it during transportation and installation.

### Claim 11 (depends on 1)

A method of applying a screen protector according to claim 1, the method comprising laying the laminated film onto the screen of the device to bring the adhesive layer into contact with the screen and bending the edges of the film over the edges of the screen and adhering them in place.

### Claim 12 (depends on 1)

A combination of a mobile electronic device with a touch screen which is curved along its longitudinal edges and a screen protector according to claim 1 adhered to the touch screen including the curved edges.