Unlock instant, AI-driven research and patent intelligence for your innovation.

Fuel system with good antigasoline property

A fuel system and fuel technology, applied in the direction of charging system, liquid fuel feeder, polyurea/polyurethane coating, etc., can solve the problems of pinholes, wall thinning, low flexibility, etc.

Inactive Publication Date: 2007-07-11
MITSUBISHI GAS CHEM CO INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, it is difficult to make the wall thinner of the catheter embedded in different layers of the catheter structure (JP-A-2001-205745), and the flexibility is low, so it is difficult to apply to catheters with complex shapes.
In addition, the method of electrostatically coating resin powder (JP-A-8-25578) is difficult to form a uniform resin layer with a predetermined thickness on the inner wall surface of the rubber tube, and there is a problem that pinholes are generated.
Furthermore, when fluorine-based resins are used in any catheter, it is difficult to obtain good adhesion to catheter base materials such as rubber materials, and it is necessary to perform additional surface treatment or use an adhesive in combination.
In addition, in the case of using a polyamide resin (JP-A-2001-165360), good adhesion to conduit base materials such as rubber materials can be obtained, but its fuel permeation resistance is insufficient, and further improvement is required. performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel system with good antigasoline property
  • Fuel system with good antigasoline property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0094] (1) Gasoline permeability coefficient of coated film coating (Examples 1-3, Comparative Example 1)

[0095] The simulated gasoline (isooctane / toluene / ethanol=45 / 45 / 10) was filled in a 75 mmφ aluminum cup, covered with the test film for evaluation, and an adhesive was applied to the joint between the cup and the film to seal it. The gas phase method in which the film is not in direct contact with the simulated gasoline, and the liquid phase method in which the film is in direct contact with the simulated gasoline are used for determination. Let it stand for 500 hours in an environment of 60°C, and calculate the gasoline permeability (g / m2) from the weight change 2 ·sky). The gasoline transmission coefficient of the coating in the experimental film was calculated using the following formula:

[0096] 1 / R=1 / Rn(n=1, 2,...)+DFT / P

[0097] Among them, R = the gasoline permeability of the experimental film (g / m 2 ·sky)

[0098] Rn (n = 1, 2, ...) = gasoline permeability o...

Embodiment 4～6

[0101] (2) Gasoline permeability coefficient of conduit and gasoline permeability coefficient of conduit coating (embodiments 4-6, comparative examples 2-3)

[0102] One end of a test piece (500 mm in length, 24 mm in inner diameter, and 5 mm in thickness) obtained from the prepared catheter was sealed with aluminum (aluminum vapor-deposited film). Put about 30g of simulated gasoline (isooctane / toluene / ethanol=45 / 45 / 10) into the conduit, seal the other end with aluminum again, and let it stand for 500 hours under the environment of 60°C and 60%RH. Hours, get the gasoline permeability (g / m 2 ·sky).

[0103] In addition, use the same method to obtain the gasoline transmission rate of the uncoated conduit shell, and use the following formula to calculate the gasoline transmission coefficient of the coating:

[0104] 1 / R=1 / R'+DFT / P

[0105] Among them, R = the gasoline permeability of the conduit (g / m 2 ·sky)

[0106] R'=gasoline permeability of the conduit housing (g / m 2 ·s...

Embodiment 4～8

[0109] (3) Gasoline transmission rate after catheter bending treatment (10 times) (Examples 4-8, Comparative Examples 2-4)

[0110] A test piece (500 mm in length, 24 mm in inner diameter, and 5 mm in thickness) obtained from the manufactured catheter was subjected to bending treatment 10 times. After treatment, the gasoline permeability (g / m 2 ·sky).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is a fuel system comprising a fuel vessel, molded parts for a fuel and / or a tube for a fuel in which bodies are constituted from at least one of a thermoplastic resin and a synthetic rubber, wherein a coating layer is formed on the surfaces in at least one side of the insides and the outsides of the fuel vessel body, the molded part bodies for a fuel and / or the tube body for a fuel or at least one of connected parts in these bodies; the above coating layer is formed by curing a polyurethane resin composition comprising an active hydrogen-containing compound (A) and an organic polyisocyanate compound(B); and the above coating layer has a gasoline permeability coefficient of 2 g.mm / m<2>.day or less at 23 DEG C and a relative humidity of 60 % RH. The above coating layer is excellent in a permeation-preventing performance against an automobile fuel (gasoline barrier property), an adhesion property between fuel vessel body and molding parts or tube, a heat resistance and an impact resistance, a flexibility, a bending resistance, etc., then a fuel vessel, molded parts for a fuel and a tube for a fuel which have excellent performances are obtained.

Description

technical field [0001] The present invention relates to a fuel system composed of a fuel container, a molded part for fuel, and a conduit for fuel, which are excellent in permeation barrier property (gasoline barrier property), heat resistance, impact resistance, etc. for motor vehicle fuel. Background technique [0002] In recent years, among typical fuel containers used in automobiles, from the viewpoints of weight reduction, rust resistance, ease of formability, recyclability, etc., there has been an active shift from metal fuel containers to thermoplastic resins. The practical direction of the fuel container made is developing. In the case of loading a fuel container on a motor vehicle, since the container is required to have various properties such as heat resistance, water resistance, and impact resistance, as a fuel tank made of thermoplastic resin, although polyethylene The single-layer fuel tank made, but because of its relatively high gasoline permeability, there ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04B05D7/02C08L23/00C08L67/06B60K15/03B32B27/00B32B27/40C08G18/50F02M37/00
CPCY02P20/141
Inventor 野村岳志小山刚司
Owner MITSUBISHI GAS CHEM CO INC