JP2008261713A - Oil resistance test method of resin material or rubber composition, and testing device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil resistance test method of a resin material or a rubber composition and a testing device therefor capable of performing safely an evaluation test of oil resistance to a soured fuel oil at a high temperature. <P>SOLUTION: This oil resistance test is performed as follows: a test body T comprising the resin material or the rubber composition which is an evaluation object and the soured fuel oil P are enclosed inside a pressure vessel 2 arranged in water W in a constant-temperature water bath 3; the temperature of the water W in the constant-temperature water bath 3 is adjusted, to thereby set the temperature of the fuel oil P at a prescribed high temperature; and the test body T is dipped into the fuel oil P as long as a prescribed time. When the fuel oil P leaks out from the pressure vessel 2, the leaking-out fuel oil P floating on the water surface in the constant-temperature water bath 3 is recovered by an oil-absorbing polymer 4 arranged near the water surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for testing oil resistance of a resin material or a rubber composition and a test apparatus therefor, and more specifically, a resin material or rubber that can safely evaluate and test the oil resistance of a resin material against a high-temperature septic fuel oil. The present invention relates to an oil resistance test method for a composition and a test apparatus therefor.

  In recent years, the development of fuel cells has become active, so that fuel cells can be used in various applications such as automobile fuel cells installed in automobiles and stationary fuel cells installed in various facilities and houses. It has become.

  By the way, in stationary fuel cells that use kerosene or light oil as raw fuel, the fuel oil component is reduced in molecular weight by a catalytic reaction that extracts hydrogen from the raw fuel, and so-called acidified fuel oil that is radicalized and peroxy-radicalized is piped It has become clear that it flows. In general, it is known that septic fuel oil will cause a great deal of damage to the resin material, and it is necessary to properly evaluate the oil resistance of the resin material against the septic fuel oil when the fuel cell piping is made into a resin. I came. Similarly, when a rubber tube or a rubber hose is used as piping, it is necessary to legitimately evaluate the oil resistance of the rubber composition.

Such an adverse effect of the septic fuel oil on the resin material or rubber composition becomes prominent in a high temperature environment, so it is necessary to perform an evaluation test with the septic fuel oil at a high temperature, but the fuel oil is usually volatile, Due to its high flammability, there is a high risk of ignition during the evaluation test. Conventionally, various methods for testing oil resistance of resin materials and the like have been proposed (see, for example, Patent Document 1). It was not a premise. For this reason, there is a problem that fuel oil volatilization suppression and fuel oil leakage prevention measures are insufficient, and an evaluation test cannot be performed safely.
JP-A-5-10944

  An object of the present invention is to provide an oil resistance test method for a resin material or a rubber composition and a test apparatus for the resin material or a rubber composition which can safely evaluate and test the oil resistance against a high-temperature, stale fuel oil.

  In order to achieve the above object, the resin material or rubber composition of the present invention has an oil resistance test method in which a test body made of a resin material or a rubber composition to be evaluated and a soured fuel oil are sealed in a pressure vessel. Place the fuel oil in the pressure vessel by setting the temperature in the water tank and adjust the water temperature of the constant temperature water tank to a predetermined temperature, and perform an evaluation test of the oil resistance of the specimen against the spoiled fuel oil When the fuel oil leaks from the pressure vessel, the fuel oil that leaks and floats on the water surface of the thermostatic water tank is collected.

  In addition, the resin material or rubber composition oil resistance test apparatus of the present invention includes a test specimen made of the resin material or rubber composition to be evaluated, a pressure vessel that encloses the spoiled fuel oil, and the pressure vessel disposed therein. And a recovery means for recovering the fuel oil leaked from the pressure vessel floating on the water surface in the vicinity of the water surface of the constant temperature water tank.

  According to the present invention, the temperature of the water temperature of the constant temperature water tank is adjusted by placing the test body made of the resin material or rubber composition to be evaluated and the spoiled fuel oil in a pressure vessel placed in the water of the constant temperature water tank. Indirectly, the fuel oil in the pressure vessel is set at a predetermined temperature, so that the ignition source does not exist in the vicinity of the fuel oil, and even if the fuel oil has high volatility and flammability, it can be safely kept at a predetermined high temperature. Can be set.

  In addition, not only is the spoiled fuel oil sealed in the pressure vessel, so that it does not leak out, but as a further safety measure, the leaked fuel oil will remain on the surface of the thermostatic tank even if it leaks from the pressure vessel. Since it will surface, it can be reliably recovered. As a result, even when fuel oil having high volatility and flammability leaks from the pressure vessel, it does not diffuse to the surroundings, and it is possible to safely perform an evaluation test without risk of ignition.

  Hereinafter, an oil resistance test method and a test apparatus for a resin material or a rubber composition of the present invention will be described based on the embodiments shown in the drawings.

  As illustrated in FIG. 1, an oil resistance test apparatus 1 (hereinafter referred to as a test apparatus 1) of the present invention includes a pressure vessel 2 and a constant temperature water tank 3 in which the pressure vessel 2 is disposed. The constant temperature water tank 3 contains a predetermined amount of water W, and the pressure vessel 2 disposed therein is immersed, and an oil absorbing polymer 4 is disposed in the vicinity of the water surface. At the bottom of the thermostatic water tank 3, an electrothermal temperature adjusting unit 3a for adjusting the temperature of the internal water W is provided.

  Inside the pressure vessel 2, a test body T made of a resin material or a rubber composition that is an object of oil resistance evaluation and a soured fuel oil P are enclosed. In addition to the inside of the pressure vessel 2, a deterioration accelerator (peroxide) of the fuel oil P may be sealed as necessary. The pressure vessel 2 is made of stainless steel such as SUS316, for example.

  Next, the test method of the present invention using this test apparatus 1 will be described using the evaluation object as a resin material.

  A fuel oil P such as kerosene or light oil, which is a raw fuel, circulates in a resin pipe used for a stationary fuel cell. This fuel oil P is degraded by the catalytic reaction when hydrogen is taken out, and the fuel oil P that has been degraded is degraded. The adverse effect on the resin is significant at high temperatures. Therefore, in order to legitimately evaluate the oil resistance of the resin material used in the resin piping against the spoiled fuel oil P, an evaluation test is performed with the spoiled fuel oil P at a predetermined high temperature.

  Therefore, by operating the temperature control unit 3a of the constant temperature water tank 3 to adjust the temperature of the water W inside the constant temperature water tank 3 to a predetermined temperature, the fuel oil P sealed in the pressure resistant container 2, that is, the pressure resistant container 2, is provided. Is set to a target predetermined temperature. For example, the flash point of kerosene is 40 ° C or higher, and the flash point of light oil is 45 to 50 ° C or higher. The predetermined temperature of the fuel oil P is set to a high temperature of about 60 ° C to 80 ° C exceeding the flash point. Can do. The pressure vessel 2 can be attached with a temperature sensor such as a thermocouple or a resistance temperature detector.

  In this way, the fuel oil P is indirectly heated to a predetermined high temperature state by directly moving the fuel oil P away from the periphery of the fuel oil P without directly heating the fuel oil P. Even when the fuel oil P has high properties, the safety at the time of heating to a predetermined temperature above the flash point can be improved. In addition, since the fuel oil P is sealed in the pressure-tight container 2 that is firmly tightened with high airtightness, the fuel oil P is prevented from leaking out of the pressure-resistant container 2 even if volume expansion is caused by heating. When it is desired to release the pressure in the pressure vessel 2, it is possible to release the pressure in a place where safety is ensured by attaching piping, an on-off valve or the like to the pressure vessel 2.

  Even if the fuel oil P leaks from the pressure vessel 2, the leaked fuel oil P floats on the water surface of the thermostatic water tank 3, and is thus reliably absorbed and recovered by the oil-absorbing polymer 4 disposed in the vicinity of the water surface. Will be. Therefore, even if the fuel oil P has high volatility and flammability, the volatile component of the fuel oil P leaked from the pressure vessel 2 is diffused into the air, resulting in a dangerous state such as ignition around the test apparatus. You can avoid that.

  As described above, according to the present invention, since multiple safety measures are taken, the oil resistance test of the resin material in which the specimen T is immersed in the fuel oil P in a predetermined high temperature state for a predetermined time is performed. This can be done safely by preventing the fire of the fire. Therefore, it is possible to accurately grasp the damage that the resin material used for the resin piping or the like of the stationary fuel cell receives from the spoiled fuel oil P and to evaluate the proper oil resistance of the resin material.

  FIG. 2 shows another embodiment of the test apparatus 1. Since this test apparatus 1 is a replacement of the test apparatus 1 illustrated in FIG. 1 with the recovery means for recovering the fuel oil P leaked from the pressure vessel 2, that is, only the oil-absorbing polymer 4, only the replaced portion is replaced. explain.

  A water inflow pipe 5 provided with a heater 7 is disposed at a predetermined position near the water surface of the constant temperature water tank 3 of the test apparatus 1, and a water outflow pipe 6 is disposed at a position facing the water inflow pipe 5. A recovery tank 8 is disposed at the lower end of the water outflow pipe 6.

  In the test apparatus 1, new water W heated to a predetermined temperature by the heater 7 through the water inflow pipe 5 is continuously poured into the constant temperature water tank 3. On the other hand, an amount of water W corresponding to the newly injected water W through the water inflow pipe 5 flows out of the constant temperature water tank 3 through the water outflow pipe 6 and is stored in the recovery tank 8. The water W newly injected through the water inflow pipe 5 is set to the same temperature as the water W whose temperature has been adjusted to a predetermined temperature in the constant temperature water tank 3 by the heater 7, and the temperature of the fuel oil P enclosed in the pressure vessel 2. Do not fluctuate. If the amount of water W to be injected is small, the heater 7 can be replaced with a copper pipe or a serpentine tube immersed in the constant temperature water tank 3 to exchange heat with the water in the constant temperature water tank 3. You can also

  If the fuel oil P leaks from the pressure vessel 2, the fuel oil P floating on the surface of the constant temperature water tank 3 is stored in the recovery tank 8 together with the water W flowing out of the constant temperature water tank 3 through the water outflow pipe 6. Is done. Thereby, the leaked fuel oil P can be reliably accommodated in the recovery tank 8, and a safe oil resistance test can be performed. Further, since the amount of water W in the constant temperature water tank 3 does not change, the variation in test conditions (temperature conditions) is small and stable.

  In this embodiment, the recovery means is composed of the water inflow pipe 5 and the water outflow pipe 6 and the recovery tank 8, but it is a mechanism that causes the water W near the water surface of the constant temperature water tank 3 to flow out of the constant temperature water tank 3. If there is, it can be adopted as a collecting means. Moreover, you may make it arrange | position the oil-absorbing polymer 4 in the water surface vicinity of the constant temperature water tank 3 of the test apparatus 1 of this embodiment.

  Examples of the fuel oil P used in the present invention include alcohols, hexane, and other volatile and highly flammable organic solvents, gasoline, and the like. Examples of the resin material to be used as the test body T include polyolefin resins, Examples thereof include thermoplastic resins such as polyester resins and polyamide resins, and thermosetting resins.

  Examples of the rubber composition to be evaluated used as the specimen T include chloroprene rubber (CR), acrylonitrile-butadiene copolymer rubber (NBR), hydrogenated acrylonitrile-butadiene copolymer rubber (HNBR), acrylic rubber (ACM), Examples thereof include ethylene-acrylic acid ester copolymer rubber (AEM) and fluorine copolymer rubber (FKM).

It is explanatory drawing which illustrates embodiment of the testing apparatus of this invention. It is explanatory drawing which illustrates another embodiment of the testing apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil resistance test apparatus 2 Pressure-resistant container 3 Constant temperature water tank 3a Temperature control part 4 Oil-absorbing polymer 5 Water inflow pipe 6 Water outflow pipe 7 Heater 8 Recovery tank P Fuel oil T Test body W Water

Claims (6)

  In the pressure vessel, the test body made of the resin material or rubber composition to be evaluated and the spoiled fuel oil are sealed and placed in the water of a constant temperature water tank, and the temperature of the water temperature of the constant temperature water tank is adjusted, whereby the pressure pressure container The fuel oil inside is set to a predetermined temperature, and the evaluation test of the oil resistance of the test specimen against the spoiled fuel oil is conducted. When the fuel oil leaks from the pressure vessel, it leaks and floats on the surface of the constant temperature water tank A method for testing the oil resistance of a resin material or a rubber composition in which fuel oil is recovered.   The oil resistance test method for a resin material or a rubber composition according to claim 1, wherein the fuel oil leaked from the pressure vessel is recovered by an oil absorbing polymer disposed in the vicinity of the water surface of the constant temperature water tank.   Water that causes the fuel oil leaked from the pressure vessel to flow out of the thermostatic water tank by injecting new water into the thermostatic water tank and causing water near the water surface to flow out of the thermostatic water tank and storing it in the recovery tank. The method for testing oil resistance of the resin material or rubber composition according to claim 1, wherein the oil material is collected together.   A test specimen made of a resin material or a rubber composition to be evaluated and a pressure vessel enclosing the spoiled fuel oil, a thermostatic water bath in which the pressure vessel is placed and immersed, and the surface of the thermostatic water bath floats near the water surface. An oil resistance test apparatus for a resin material or a rubber composition, comprising recovery means for recovering fuel oil leaked from the pressure vessel.   The oil resistance test apparatus for a resin material or a rubber composition according to claim 4, wherein the recovery means is an oil-absorbing polymer disposed in the vicinity of the water surface of the constant temperature water tank.   The recovery means includes a water inflow pipe for injecting new water into the constant temperature water tank, a water outflow pipe for allowing water near the water surface to flow out of the constant temperature water tank, and a recovery tank disposed at a lower end of the water outflow pipe. An oil resistance test apparatus for a resin material or a rubber composition according to claim 4.

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