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Ethanol petrol resistant acrylonitrile butadiene / polychloroethylene blended rubber tube and preparation thereof

A technology of nitrile rubber and polyvinyl chloride, which is applied in the direction of pipes/pipe joints/fittings, hoses, pipes, etc., can solve the problems of inability to meet the requirements of use, inability to meet the application, poor processing technology, etc., and achieve excellent chemical stability and weather resistance, low cost, and the effect of improving oil resistance

Active Publication Date: 2009-08-12
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the change in the composition of vehicle fuel gasoline, the corresponding rubber parts must be suitable for ethanol gasoline. The original nitrile rubber can no longer meet the use requirements due to obvious swelling in ethanol gasoline; although fluorine rubber and chloroether rubber are resistant to The performance of ethanol gasoline is very good, but the processing technology is poor and the price is high
It can be seen that nitrile rubber can no longer meet the application of existing fuel gasoline, and the price of fluororubber and chloroether rubber is too high

Method used

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  • Ethanol petrol resistant acrylonitrile butadiene / polychloroethylene blended rubber tube and preparation thereof
  • Ethanol petrol resistant acrylonitrile butadiene / polychloroethylene blended rubber tube and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] produce a figure 1 and figure 2 For the NBR / PVC hose whose size is 41±0.5mm×51±0.5mm×230±3mm, the steps are as follows:

[0020] 1. Rubber material selection

[0021] This kind of rubber hose requires moderate resistance to ethanol gasoline, and the 70:30 NBR / PVC blended rubber is selected to be mechanically blended on a rubber mill under the condition of 155 ° C to 165 ° C.

[0022] 2. Tube embryo manufacturing process

[0023] A pin-barrel cold-feed extruder with a length-to-diameter ratio of 12 was selected.

[0024] Extrusion inner rubber: head temperature: 85°C, extrusion section temperature: 75°C, plasticizing section temperature: 70°C, feeding section temperature: 60°C.

[0025] The reinforcement layer is made of aramid thread and has a knitted structure.

[0026] Extrusion cover: head temperature: 85°C, extrusion section temperature: 75°C, plasticizing section temperature: 70°C, feeding section temperature: 60°C. And choose a 50mm needle and a 53mm mouth ...

Embodiment 2

[0038] Produce a kind of NBR / PVC rubber hose that size is 30 ± 0.5mm * 40 ± 0.5mm * 470 ± 3mm, method step is as shown in embodiment 1, difference is:

[0039] 1. Rubber material selection

[0040] This kind of rubber hose requires high ethanol gasoline resistance, and the NBR / PVC blend rubber of 55:45 is used for extrusion.

[0041] 2. Tube embryo manufacturing process

[0042] A rubber extruder with an aspect ratio of 11 was selected.

[0043] Extrusion inner rubber: head temperature: 90°C, extrusion section temperature: 85°C, plasticizing section temperature: 80°C, feeding section temperature: 70°C.

[0044] The reinforcement layer is made of polyester thread and has a knitted structure.

[0045] Extrusion cover: head temperature: 90°C, extrusion section temperature: 85°C, plasticizing section temperature: 80°C, feeding section temperature: 70°C. And choose a 39mm needle and a 41mm mouth shape to ensure the size of the hose.

[0046] 3. Cooling

[0047] After the rubb...

Embodiment 3

[0057] Produce a kind of NBR / PVC rubber hose that size is 8 ± 0.4mm * 16 ± 0.4mm * 530 ± 3mm, method step is as shown in embodiment 1, difference is:

[0058] 1. Rubber material selection

[0059] This kind of rubber hose only requires low ethanol gasoline resistance, and 80:20 NBR / PVC blend rubber is used for extrusion.

[0060] 2. Tube embryo manufacturing process

[0061] A rubber extruder with an aspect ratio of 15 was selected.

[0062] Extrusion inner rubber: head temperature: 80°C, extrusion section temperature: 70°C, plasticizing section temperature: 60°C, feeding section temperature: 60°C.

[0063] The reinforcement layer is made of aramid yarn and adopts a braided structure.

[0064] Extrusion cover: head temperature: 80°C, extrusion section temperature: 70°C, plasticizing section temperature: 60°C, feeding section temperature: 60°C. And choose a 15mm needle and a 17mm mouth shape to ensure the size of the hose.

[0065] 3. Cooling

[0066] After the rubber mater...

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Abstract

The invention relates to an acrylonitrile butadiene rubber / polyvinyl chloride blended rubber tube resistant to ethanol gasoline and a preparation method thereof. The rubber tube consists of three layers which are a rubber layer, an enhancement layer and a rubber layer from the inside out and is produced by extruding, and vulcanization process of a steam vulcanizer. The preparation process is as follows: extruding semi-finished products: at first, selecting a rubber extruder (pin barrel cold-feed extruder is preferred) having a screw with the length-diameter ratio of 11-15, wherein, temperature of the extruder at various sections is as follows: diehead temperature is 70-90 DEG C, temperature of extrusion section is 65-85 DEG C, temperature of plasticization section is 65-85 DEG C and the temperature of feed section is 60-80 DEG C; selecting a proper machine needle and a proper exit die to ensure size of the rubber tube according to size of the finished rubber tube; vulcanizing for molding by the steam vulcanizer: sheathing the semi-finished products on a mandrel with fixed specification and pushing into the steam vulcanizer for vulcanization, wherein, the vulcanization is performed at the temperature of 150-170 DEG C for 15-40min. The rubber tube has characteristics of low price and weathering resistance and helps solve a problem that the rubber tube swells after use of the ethanol gasoline as automobile fuel.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to an ethanol-gasoline-resistant nitrile rubber / polyvinyl chloride (NBR / PVC) blended rubber hose and a preparation method thereof. Background technique [0002] With the deepening of people's understanding of the global energy crisis and environmental protection, the fuel gasoline used in automobiles is gradually replaced by ethanol. Ethanol fuel for vehicles, also known as ethanol gasoline, refers to special gasoline component oils that do not contain MTBE (methyl tert-butyl ether) oxygen-containing additives (produced by refineries or petrochemical plants for blending ethanol for vehicles) A new generation of clean and environment-friendly vehicle fuel is formed by adding a certain proportion (tentatively 10% in my country) of denatured fuel ethanol to the blended oil of gasoline) according to the volume ratio, and mixed through a specific process. It does not affect the driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L27/06B29C47/60B29C47/92B29C47/88B29C35/04B29C47/66B29C47/06F16L11/04B29C48/09B29C48/395B29C48/625B29C48/92
CPCB29C47/38B29C48/92B29C2948/92704B29C48/09B29C48/395B29C48/625B29C48/9185B29C2948/92561B29C2948/92638B29C2948/92895B29C2948/92904B29C2948/92923
Inventor 张洪起孙佩祝李风海张桂林
Owner TIANJIN PENGYI GRP CO LTD
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