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Special-shaped fuel hose wound by 5-layer tetrafluoroethylene (TFE) resin films and preparation method thereof

A technology of tetrafluoroethylene resin and fuel hose, which is applied in the direction of hose, pipe, tubular articles, etc., can solve the problems of inability to make special shapes and poor flexibility of fluororesin.

Inactive Publication Date: 2012-07-04
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pengling Company designed a reasonable process and applied it to the current fuel system pipeline to solve the defects of poor flexibility and inability to make special shapes of fluororesin. It was first applied to automobiles, and the permeability performance was slightly improved through experiments.

Method used

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  • Special-shaped fuel hose wound by 5-layer tetrafluoroethylene (TFE) resin films and preparation method thereof
  • Special-shaped fuel hose wound by 5-layer tetrafluoroethylene (TFE) resin films and preparation method thereof
  • Special-shaped fuel hose wound by 5-layer tetrafluoroethylene (TFE) resin films and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] To produce a five-layer special-shaped fuel hose with an inner diameter of 7.3±0.3mm×13.3±0.5mm×1000±3mm, the steps are as follows:

[0029] 1. Extrusion process

[0030] ①Single-screw straight extruder with a core to extrude the inner layer of fluororubber, extrusion temperature: 95°C, 85°C, 85°C, 75°C; mandrel diameter selection 7.3±0.1mm, extrusion wall thickness 0.5mm, extrusion The output speed is 17.6m / min.

[0031] ② Select the F200 film with a model size of 0.05mm×25mm, and wrap it on the outside of the inner rubber through a cloth wrapping machine. The lap width is 2mm, the winding line speed is 17.6m / min, and the ratio of rotation speed to line speed is 41:1.

[0032] ③Cover the middle layer of chlorohydrin rubber directly through a single-screw T-type extruder after traction, extrusion temperature: 95°C, 90°C, 90°C, 85°C, extrusion speed 17.6m / min, middle layer thickness 1.0mm.

[0033] ④ After parking and cooling, weave the reinforcing layer, choose aramid...

Embodiment 2

[0041] To produce a five-layer special-shaped fuel hose with an inner diameter of 12.7±0.3mm×19.7±0.5mm×1000±3mm, the steps are as follows:

[0042] 1. Extrusion process

[0043] ①Single-screw straight extruder with a core to extrude the inner layer of fluororubber, extrusion temperature: 90°C, 80°C, 80°C, 70°C; mandrel diameter selection 12.5±0.1mm, extrusion wall thickness 0.6mm, extrusion The output speed is 13.6m / min.

[0044] ② Select the F200 film with a model size of 0.05mm×30mm, and wrap it on the outside of the inner rubber through a cloth wrapping machine. The lap width is 2mm, the winding line speed is 13.6m / min, and the ratio of rotation speed to line speed is 35:1.

[0045] ③Cover the middle layer of chlorohydrin rubber directly through a single-screw T-type extruder after traction, extrusion temperature: 90°C, 85°C, 85°C, 80°C, extrusion speed 13.6m / min, middle layer thickness 1.4mm.

[0046] ④ After parking and cooling, weave the reinforcing layer, choose aram...

Embodiment 3

[0055] To produce a five-layer special-shaped fuel hose with an inner diameter of 15.7±0.3mm×23.7±0.5mm×1000±3mm, the steps are as follows:

[0056] 1. Extrusion process

[0057] ①Single-screw straight extruder with a core to extrude the inner layer of fluororubber, extrusion temperature: 85°C, 75°C, 75°C, 65°C; mandrel diameter selection 7.3±0.1mm, extrusion wall thickness 0.5mm, extrusion The output speed is 12.6m / min.

[0058] ② Select the F200 film with a model size of 0.05mm×35mm, and wrap it on the outside of the inner rubber through a cloth wrapping machine. The lap width is 2mm, the winding line speed is 12.6m / min, and the ratio of rotation speed to line speed is 37:1.

[0059] ③Cover the middle layer of chlorohydrin rubber directly through a single-screw T-type extruder after traction, extrusion temperature: 85°C, 80°C, 80°C, 75°C, extrusion speed 12.6m / min, middle layer thickness 1.2mm.

[0060] ④ After parking and cooling, weave the reinforced layer, choose aramid...

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Abstract

The invention relates to the technical field of hoses, in particular to a special-shaped fuel hose wound by 5-layer tetrafluoroethylene (TFE) resin films and a preparation method thereof. The fuel hose wound by the 5-layer tetrafluoroethylene (TFE) resin films sequentially consists of a fluororubber layer 2, an F200 layer 3, an intermediate rubber layer 4, a reinforcing layer 5 and an external rubber layer 6 from inside to outside, wherein, the thicknesses of the fluororubber layer, the F200 layer, the intermediate rubber layer and the external rubber layer are 0.5mm to 0.8mm, 0.05mm, 1.0mm to 1.5mm and 1.0mm to 2.0mm respectively; and the inner diameter of the fuel hose ranges from 7.3mm to 15.7mm. The preparation of the structural pipeline can not only serve the function of preventing the fuel from permeating and meet the requirements for impermeability in Euro 4 Emission Standard, but also overcome the problems that the existing Euro 4 special-shaped fuel pipeline is difficult to be molded and the flexibility of the hose is poor.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to a five-layer tetrafluoroethylene resin film winding special-shaped fuel rubber hose and a manufacturing method. Background technique [0002] The present invention is a new type of product aimed at emission standards above Euro IV. As the implementation date of Euro IV requirements in China is approaching day by day, more and more automobile factories require parts and components to meet Euro IV emission standards. Four corresponding fuel hose structures 1, such as figure 1 As shown, the inner extruded fluororesin 1, the middle rubber layer 4, the reinforcing layer 5 and the outer rubber layer 6. Since the fluororesin is in a vitrified state at room temperature, it has high hardness and is not easily deformed. figure 2 In the shape shown, it is difficult to make the semi-finished product with fluororesin layer attached to the mandrel during the process of vulcanization an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L11/04B29D23/00B29C47/00B29C70/68
Inventor 张洪起孙国君
Owner TIANJIN PENGYI GRP CO LTD