# US 11,897,217 B2 · Method to manufacture an electronic device for a rubber article

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- Number: US 11,897,217 B2
- Document ID: US11897217B2
- Status: Granted
- Kind: B2
- Application number: 17/626,651
- Filed: 2020-07-15
- Published: 2022-09-08
- Granted: 2024-02-13
- Earliest claimed: 2019-07-23
- Assignees: Bridgestone Europe NV/SA
- Applicants: Bridgestone Europe NV/SA [Be/Be]
- Inventors: Maria Cristina Caccami; Francesco Iozia; Raffaele Di Ronza; Roberto Lombardi; Maria Cecilia Palumbi, I; Giacomo Andreini
- Web page: https://patentgrep.com/patent/US11897217B2

## CPC

- B29D 30/0061: {Accessories, details or auxiliary operations not otherwise provided for}
- B60C 23/0447: {Wheel or tyre mounted circuits}
- B60C 23/0493: {for attachment on the tyre}
- G06K 19/07722: {the record carrier being multilayered, e.g. laminated sheets (flat articles in general, see B32B37/00)}
- G06K 19/07764: {the adhering arrangement making the record carrier attachable to a tyre (tyre temperature or pressure control arrangements, see B60C23/00)}
- G06K 19/07773: {Antenna details (antennas for wireless devices, e.g. RFID tags, in general H01Q1/22)}
- G06K 19/07794: {the record carrier comprising a booster or auxiliary antenna in addition to the antenna connected directly to the integrated circuit}
- B29D 2030/0077: {Directly attaching monitoring devices to tyres before or after vulcanization, e.g. microchips}
- B29D 2030/0083: {Attaching monitoring devices to tyres before or after vulcanization by inserting them inside tyre cavities}
- H01Q 1/2241: {used in or for vehicle tyres}
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A method to manufacture an electronic device to be applied to rubber article. The device comprises an electronic element, two layers of thermoplastic material which are arranged in a sandwich-like manner so as to contain, between one another, the electronic element, and at least an outer rubber layer arranged to cover an outer surface of at least one of the respective thermoplastic layers. The method comprises a preliminary step comprising (a) a deposition operation, during which an adhesive solution consisting of a basic water solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde is applied on at least one outer surface of one of the layers of thermoplastic material; and (b) a heating operation, during which the layers of thermoplastic material on which the adhesive solution was applied are kept at a temperature ranging from 120 to 230° C. for an amount of time ranging from 2 to 15 min.

## Claims

### Claim 1

A method to manufacture an electronic device to be applied to a rubber article, wherein the device comprises an electronic element, two layers of thermoplastic material which are arranged in a sandwich like manner so as to contain said electronic element there between, and at least two outer rubber layers, each of the at least two outer rubber layers arranged to cover an outer surface of a respective thermoplastic layer, said method comprising:
a deposition operation, during which an adhesive solution comprising a basic water solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde is applied on at least one outer surface of one of the layers of thermoplastic material; and
a heating operation, during which the layers of thermoplastic material on which the adhesive solution was applied are kept at a temperature ranging from 120 to 230° C. for an amount of time ranging from 2 to 15 min.

### Claim 2 (depends on 1)

The method of claim 1, wherein at least one of the layers of thermoplastic material is made of insulating material.

### Claim 3 (depends on 2)

The method of claim 2, wherein said insulating material is chosen in a group comprising polyesters, polyamides, and polyimides.

### Claim 4 (depends on 2)

The method of claim 2, wherein said insulating material is comprised in a group consisting of PET, Nylon, and polyethylene naphtalate.

### Claim 5 (depends on 1)

The method of claim 1, wherein said basic water solution comprises a pre-condensed resin comprising resorcinol and formaldehyde with isocyanate blocking groups.

### Claim 6 (depends on 5)

The method of claim 5, wherein said basic water solution comprises lignin and a chemical chosen between urea and thiourea.

### Claim 7 (depends on 1)

The method of claim 1, wherein said elastomer rubber latex comprises a latex of styrene-butadiene-vinylpyridine or a mixture of styrene-butadiene-vinylpyridine and styrene-butadiene.

### Claim 8 (depends on 1)

The method of claim 1, wherein said deposition operation involves said adhesive solution being applied on both surfaces of the layers of thermoplastic material.

### Claim 9 (depends on 1)

The method of claim 1, wherein said rubber article is a tire.

### Claim 10 (depends on 1)

The method of claim 1, wherein said electronic element comprises an RFID chip, a first antenna connected to the chip, and a second antenna electromagnetically coupled to the first antenna.

### Claim 11

An electronic device to be used in a rubber article, wherein the device comprises:
an electronic element;
two layers of thermoplastic material which are arranged in a sandwich like manner so as to contain said electronic element there between;
at least two outer rubber layers, each of the at least two outer rubber layers arranged to cover an outer surface of a respective thermoplastic layer; and
an adhesive solution comprising a basic water solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde applied on at least one outer surface of one of the layers of thermoplastic material,
wherein the layers of thermoplastic material on which the adhesive solution was applied are kept at a temperature ranging from 120 to 230° C. during a heating operation of manufacture of the electronic device for an amount of time ranging from 2 to 15 min.

### Claim 12 (depends on 11)

The electronic device of claim 11, wherein the electronic device is a radio-frequency identification (RFID) device.

### Claim 13 (depends on 12)

The electronic device of claim 12, wherein said electronic element comprises an RFID chip, a first antenna connected to the chip, and a second antenna electromagnetically coupled to the first antenna.

### Claim 14 (depends on 11)

The electronic device of claim 11, wherein at least one of the layers of thermoplastic material is made of insulating material.

### Claim 15 (depends on 14)

The electronic device of claim 14, wherein said insulating material is chosen in a group comprising polyesters, polyamides, and polyimides.

### Claim 16 (depends on 15)

The electronic device of claim 15, wherein said insulating material is comprised in a group consisting of PET, Nylon, and polyethylene naphtalate.

### Claim 17 (depends on 11)

The electronic device of claim 11, wherein said basic water solution comprises a pre-condensed resin comprising resorcinol and formaldehyde with isocyanate blocking groups.

### Claim 18 (depends on 17)

The electronic device of claim 17, wherein said basic water solution comprises lignin and a chemical chosen between urea and thiourea.

### Claim 19 (depends on 11)

The electronic device of claim 11, wherein said elastomer rubber latex comprises a latex of styrene-butadiene-vinylpyridine or a mixture of styrene-butadiene-vinylpyridine and styrene-butadiene.

### Claim 20 (depends on 11)

The electronic device of claim 11, wherein said rubber article is a tire.