# US 2019/0315225 A1 · Fuel tank composition

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- Number: US 2019/0315225 A1
- Document ID: US20190315225A1
- Status: Published application
- Kind: A1
- Application number: 16/317,367
- Filed: 2017-07-27
- Published: 2019-10-17
- Earliest claimed: 2016-07-27
- Assignees: Plastic Omnium Advanced Innovation and Research
- Applicants: Plastic Omnium Advanced Innovation and Research
- Inventors: Laurent DUEZ; Pierre DE KEYZER
- Web page: https://patentgrep.com/patent/US20190315225A1

## CPC

- B60K 15/03177: {made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material (B60K15/03006 takes precedence)}
- B29C 66/54: {Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles}
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B32B 27/08: of synthetic resin
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/34: comprising polyamides
- B60K 15/03006: {Gas tanks (B60K15/07 takes precedence)}
- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- F17C 1/16: constructed of plastics materials {(shaping of plastics B29C)}
- B29C 45/0001: {characterised by the choice of material}
- B29C 65/02: by heating, with or without pressure
- B29C 66/1142: {Single butt to butt joints}
- B29C 66/721: {Fibre-reinforced materials (B29C66/729 takes precedence)}
- B29K 2077/10: {Aromatic polyamides [polyaramides] or derivatives thereof}
- B29L 2031/7156: {Pressure vessels}
- B29L 2031/7172: {Fuel tanks, jerry cans}
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/046: Synthetic resin
- B32B 2262/101: Glass fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2307/50: having particular mechanical properties
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/724: Permeability to gases, adsorption
- B32B 2605/00: Vehicles
- B60K 2015/03059: {Fuel tanks with double shells or more}
- B60K 2015/03493: {made of plastics}
- F17C 2201/0109: with exteriorly curved end-piece
- F17C 2201/056: Small (<1 m3)
- F17C 2201/058: portable (<30 l)
- F17C 2203/0604: Liners
- F17C 2203/066: Plastics
- F17C 2203/0675: with details of composition
- F17C 2209/2118: by injection
- F17C 2209/2154: Winding
- F17C 2209/221: Welding
- F17C 2221/012: Hydrogen
- F17C 2223/0123: gaseous, e.g. CNG, GNC
- F17C 2223/036: Very high pressure (>80 bar)
- F17C 2260/012: Reducing weight
- F17C 2260/036: Avoiding leaks
- F17C 2270/0178: Cars
- Y02E 60/32: Hydrogen storage
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25)
- 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention proposes a fuel tank comprising at least two shells weldable together, each of said at least two shells is made of a polymer composition comprising at least 45% by weight of at least one aromatic polyamide and at least 10% by weight of at least one aliphatic polyamide relative to the total weight of the polymer composition.

## Claims

### Claim 1

A fuel tank comprising at least two shells weldable together, each of said at least two shells is made of a polymer composition comprising at least 45% by weight of at least one aromatic polyamide and at least 10% by weight of at least one aliphatic polyamide relative to the total weight of the polymer composition, the maximum content of aromatic group-containing repeating units in an aliphatic polyamide being 0 mole % based on 100 mole % repeating units in the polymer.

### Claim 2 (depends on 1)

The fuel tank according to claim 1, wherein the weight ratio between the at least one aromatic polyamide and the at least one aliphatic polyamide is comprised between 1.4 and 9.

### Claim 3 (depends on 1)

The fuel tank according to claim 1, wherein the polymer composition comprises:
at least one first composition of aromatic polyamide in a first proportion of from 65 to 90% by weight relative to the total weight of the polymer composition, said first proportion being measured by NMR spectroscopy; and
at least one second composition of aliphatic polyamide in a second proportion of from 10 to 35% by weight relative to the total weight of the polymer composition, said second proportion being measured by NMR spectroscopy.

### Claim 4 (depends on 3)

The fuel tank according to claim 3, wherein the first proportion is from 75 to 80% by weight relative to the total weight of the polymer composition and the second proportion is from 20 to 25% by weight relative to the total weight of the polymer composition.

### Claim 5 (depends on 3)

The fuel tank according to claim 3, wherein said first composition further comprises a first modifying agent, and wherein the proportion of aromatic polyamide is from 60 to 100% by weight relative to the total weight of said first composition, and the proportion of first modifying agent is from 0 to 40% by weight relative to the total weight of said first composition.

### Claim 6 (depends on 3)

The fuel tank according to claim 3, wherein said second composition further comprises a second modifying agent, and wherein the proportion of aliphatic polyamide is from 60 to 100% by weight relative to the total weight of said second composition, and the proportion of second modifying agent is from 0 to 40% by weight relative to the total weight of said second composition.

### Claim 7 (depends on 1)

The fuel tank according to claim 1, wherein the at least one aromatic polyamide is a polyphthalamide (PPA).

### Claim 8 (depends on 1)

The fuel tank according to claim 1, wherein the at least one aliphatic polyamide is a PA6 or/and PA6.6.

### Claim 9 (depends on 1)

The fuel tank according to claim 1, wherein the polymer composition is substantially devoid of agents adversely affecting the fuel permeability.

### Claim 10 (depends on 1)

A vehicle containing a fuel tank according to claim 1.