JPH0411947A - Production of fuel absorber - Google Patents

Abstract

PURPOSE:To obtain a fuel absorber having superior durability and evaporated fuel capturing ability by allowing a polymer to react with thermoplastic resin powder in the presence of a cross-linking agent, coating a thermoplastic carrier with the resulting polymer gel contg. the resin powder and heating the gel. CONSTITUTION:An org. high molecular compd. having fuel capturing function such as polyisoprene or polybutadiene is dissolved in a solvent such as toluene or benzene and thermoplastic resin powder for a binder such as PP or PE powder is added to the resulting soln. and mixed. A reaction is allowed to take place in the presence of a cross-linking agent such as benzoyl peroxide. After the end of the reaction, polymer gel 5 contg. the thermoplastic resin powder 52 is collected. A thermoplastic carrier 60 such as PP or PE is coated with the gel 50 and this gel 50 is dried and heated to a temp. at which the powder 52 melt-sticks together and the surface of the carrier 60 melts. Fine particles of the polymer are stuck together by the powder and also stuck to the carrier.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a fuel absorber used in a fuel evaporation prevention device.

[Prior Art] When a fuel gun is used to supply fuel into a fuel tank of an automobile, a relatively large amount of fuel is released.

Additionally, a portion of the fuel in the fuel tank and the float chamber of the carburetor evaporates both when the vehicle is running and when it is stopped.

Therefore, in order to prevent these evaporated fuels from leaking into the atmosphere, canisters (fuel evaporation prevention devices) filled with a fuel absorber are connected to these tanks and the like. This fuel absorber is for capturing single shot fuel. In addition, evaporated fuel from fuel storage tanks, etc. is not limited to automobiles,
Further, in order to capture leaked fuel liquid, a fuel evaporation prevention device similarly filled with a fuel absorber is used.

Activated carbon has conventionally been used as the fuel absorber. The fuel adsorbed on activated carbon.

Released from activated carbon during purge. Therefore,
Activated carbon is used by repeatedly adsorbing and desorbing fuel (see Part 3 below).

[Problem to be solved] However, canisters using the above-mentioned activated carbon often reduce the amount of evaporated fuel to lj! In some cases, the vaporized fuel is not captured and is released into the atmosphere.

When the cause of this was investigated, it was revealed that when activated carbon comes into contact with liquid gasoline, the ability of activated carbon to capture gasoline brown air is significantly reduced.

Furthermore, it has been found that the reason why the activated carbon comes into contact with liquid gasoline is that the liquid gasoline that has condensed on the piping connected to the canister and the wall surface above the canister comes into contact with the activated carbon.

The above-mentioned condensation of gasoline vapor occurs in the surrounding pipes and the space above the canister, especially when the outside temperature is high and the vapor pressure of gasoline in the fuel tank or vaporizer is very high.

In addition, activated carbon's ability to capture brown energy (working capacity)
Another reason for the decline is that among the fuel molecules adsorbed on activated carbon, small molecules with less than 4 or 5 carbon atoms are easily released during the canister purging process;
Molecules larger than this are difficult to release. Also, therefore, the vapor trapping capacity decreases as the time of use of the canister increases.

It has also been proposed to use organic polymers such as polypropylene and styrene-butadiene copolymers as fuel absorbers in place of activated carbon (Japanese Unexamined Patent Publications No. 1-67222 and No. 1-227861). However, a nuclear fuel absorber's fuel absorption capacity decreases while repeating a cycle of fuel absorption and desorption (adsorption/desorption cycle).

The reason for this is thought to be as follows. Intensity of primary particles, 1
Since the binding force between the primary particles (strength of the secondary particles) is weak, swelling during absorption and contraction during separation occur repeatedly, and furthermore, due to vibration, etc., the primary particles are destroyed and the secondary particles collapse. Such fine particles are easily scattered and cause a bias on the absorption side, resulting in a decrease in absorption capacity. Furthermore, when the two particles are made finer, the porosity decreases, so clogging occurs more easily during swelling, and the absorption capacity decreases.

In view of these conventional problems, it is an object of the present invention to provide a method for manufacturing a fuel absorber that has excellent durability against the above-mentioned adsorption/desorption cycle and has an excellent ability to capture evaporated fuel.

[Means for solving problems]

The present invention involves dissolving an organic polymer compound having a fuel trapping function in a solvent, adding and mixing a thermoplastic resin powder for a binder to the solution, and then reacting the organic polymer compound in the presence of a crosslinking agent for reaction. After completing one reaction, collect the polymer gel containing the thermoplastic resin powder, apply it to a thermoplastic carrier, dry it, and apply it to the thermoplastic carrier at a temperature at which the thermoplastic resin powders fuse together. A method for manufacturing a fuel absorber, characterized in that a fuel absorber with a carrier is obtained by heating to a surface fusion temperature.

In the present invention, an organic polymer compound having a fuel trapping function refers to an organic polymer compound that has a function of trapping evaporated fuel (including leaked fuel liquid) and is at least crosslinkable to the extent of forming a gel. say. In addition, 1. The capture function here refers to the property of being dissolved in or swollen by fuel.

Moreover, the above-mentioned reaction refers to any chemical reaction including crosslinking and/or polymerization reaction of the above-mentioned organic polymer compound.

Further, these reactions may be carried out using any of the usual polymerization methods such as turbid polymerization, emulsion polymerization, and solution polymerization.

As described later, in the case of suspension polymerization and emulsion polymerization, polymer gel particles are obtained, while in the case of solution polymerization, a polymer gel body is obtained.

Examples of organic polymer compounds having the above properties include polyisoprene, polybutadiene, polyisobutylene, polystyrene, polynorporinpolysiloxane, ethylene-propylene-diene copolymer, styrene-butadiene copolymer, ethylene-propylene copolymer, etc. Polymers, isobutylene isoprene copolymers, butanene-acrylonitrile copolymers, ethylene-vinyl acetate copolymers, acrylic polymers, polyepichlorohydrin, and styrene-isoprene copolymers are used.

In addition, solvents used when reacting these organic polymer compounds include toluene, dimethyl hexane, trimethyl hexane, pentane, hexane, heptane, methylene chloride, chloroform, carbon tetrachloride trichloroethylene, etc. .

The ratio of the organic polymer compound to the solvent is 2 to 30% (by weight) and 70 to 9% of the solvent.
It is preferably 8%.

Further, the thermoplastic resin powder for the binder includes crystalline resins such as PP, PE, PBT, PET, POM, and nylon. The thermoplastic resin powder is used as a bonding agent to fuse the intermediate particles together, as described below, and does not participate in the reaction of the organic polymer compound described above, or at least does not impair the fusion properties. It crosslinks only to a certain extent. Further, the thermoplastic resin powder is added to the solvent together with the organic polymer compound, but the thermoplastic resin powder used is one that is not completely soluble in the solvent.

Further, the thermoplastic resin powder is added in an amount of 20 to 70% by weight based on the organic polymer compound. If it is less than 20%, it will not be effective as a binder, and if it exceeds 70%, there will be too much thermoplastic resin powder, which may reduce the fuel absorption capacity.

In addition, the particle size of the thermoplastic resin powder is 0.01
It is preferable to use one having a diameter of 1000 μm.

Next, as a crosslinking agent, hengeyl peroxide,
Diacyl peroxides such as lauroyl peroxide, 2.4. , l) Hydroperoxides such as lymethyl hentyl-2-hydroperoxide, dialkyl peroxides such as dicumyl peroxide! , 1. 1 di-t-butyl peroxy-3,
Peroxy ketals such as 3,5-trimethyl cyclohexane, alkyl peresters such as t-butyl peroquinone neodecanoate, percarbonates such as bis(4-L butyl cyclohexyl) peroxy dicarbonate, There are peroxide-based crosslinking agents such as ketone peroxides such as methyl, ethyl, and ketone peroxide.

Furthermore, crosslinking agents commonly used in boat fishing, such as sulfur, sulfur compounds, amine compounds, eboxo compounds, and carboxo compounds, can also be used. Further, it is preferable to use a crosslinking agent that is capable of crosslinking the organic polymer compound having a fuel trapping function and does not crosslink the thermoplastic resin for the binder.

If one reaction is insufficient, a crosslinking aid is added.

Such crosslinking aids for peroxide crosslinking agents include tetrahydrofurfuryl methacrylate, ethylene dimethacrylate, 1,3-butylene dimethacrylate, polyethylene glycol dimethacrylate, 2-2bis(4- Methacryloxy Shedkin
phenyl) propane, aluminum methacrylate calcium dimethacrylate triallyl innoanurate, diallyl phthalate, divinyl hanzene
P-quinone dioquine 12 Polybutanene, g yellow, etc.

On the other hand, for crosslinking agents other than the above peroxide type,
- A crosslinking aid used for boat fishing can be used.

In addition, the crosslinking agent is 1 to 20% of the organic polymer compound,
The crosslinking aid is also added in an amount of 0 to 20%.

Further, it is preferable that the organic polymer compound solution is subjected to a deoxidation treatment before performing the above reaction. As such a deoxidation treatment method, 1 is added to the organic polymer compound solution.
For example, there is a method of bubbling nitrogen (N2) gas.

There is also a method of repeating the operation of evacuating the container containing the solution and then filling it with NZ gas. This causes dissolved oxygen to be released from the two reaction solutions.

Next, in the case of turbid polymerization or emulsion polymerization, a reaction is carried out using a solution containing a dispersant as described below.

That is, the above solution containing an organic polymer compound and a crosslinking agent is
In the dispersant-containing solution, W! Add with stirring to make two dispersions. Then, heating and stirring are continued until the crosslinking agent is almost completely decomposed to cause one reaction.

As the dispersant, polyvinyl alcohol (PVA)
, gelatin, gum tragacanth, gum arabic, starch, methylcellulose, carboxymethylcellulose,
Synthetic surfactants such as polyacrylates, alkaline soaps, organic amine soaps, sulfur esters of higher alcohols, nonionic surfactants such as Tweens, proteins,
These include vegetable gum, alginate, saponin, etc.

Further, it is preferable that the solution containing one dispersion side is also subjected to deoxidation treatment in the same manner as above. Furthermore, water is usually used as the solvent for the solution. Also.

The concentration of the dispersant in the solution is about 1 to 5%.

After the reaction is completed, when it is cooled, the polymer obtained by the reaction and the solution are separated into upper and lower parts. By collecting the upper polymer phase, a fresh cream-like paste is obtained. This is the polymer gel fine particles. The polymer gel microparticles are made of a microparticle polymer with a particle size of IO to 1100p, adhering to it,
Contains thermoplastic resin powder for mixed binder, 2 solvents, dispersant, etc.

Next, polymer gel fine particles containing the thermoplastic resin powder are applied to the surface of the thermoplastic carrier and then dried. As a result, an intermediate body is obtained in which a large number of the finely divided polymers are lightly adhered to the thermoplastic resin powder, and these are adhered to the surface of the thermoplastic carrier.

Then, these are heated at a temperature higher than the fusion temperature of the thermoplastic resin powder and the fusion temperature of the surface of the thermoplastic carrier (
(melting temperature) or higher. As a result, the fine particulate polymers are fused to each other by the thermoplastic resin powder and also to the thermoplastic carrier. A fuel absorber with a carrier is obtained.

This fuel absorber also has a bonding structure in which both the carrier and binder are heat-fused, so it has high strength against impact, etc. Also, the carrier made of thermoplastic resin is usually flexible, so it is difficult to break. .

Furthermore, as shown in FIGS. 1 and 2, fine particulate polymer 5
0 is 1 because the binder takes a porous bond structure.
Improved air permeability and higher fuel absorption efficiency.

On the other hand, in the case of solution polymerization, the reaction is performed after adding a crosslinking agent to the organic polymer compound solution. In this case, no dispersant 5 is used. After one reaction is completed, a polymer gel containing the thermoplastic resin powder is obtained. This is applied to the thermoplastic carrier in the same manner as above. Thereafter, it is dried, heated, and fused in the same manner as above.

The shape of the thermoplastic carrier may be one particle, one plate, one cloth, a net, or a thread. Further, as the material of the thermoplastic carrier, there are thermoplastic resins such as PP PE PBT PETPOM and crystalline resins such as nylon.

Further, it is preferable to use a thermoplastic carrier made of the same material as the thermoplastic resin powder, or a material having a fusing temperature almost similar thereto.

Further, the thermoplastic carrier 1 may be composed of two layers, a core portion and a surface layer portion, and the above-mentioned thermoplastic carrier resin may be used for the 5 surface layer portion. At this time, the core material is PEPP, PBT, PET, PO, which has a higher melting point than the surface layer.
M, nylon, polyimide, polysulfone, polyethersulfone, polyamideimide, polyphenylene oxide, thermoplastic resin such as PPS, or phenol type
Melamine-based, epoxy-based, polyimide-based, urea-based.

Synthetic resins such as unsaturated polyester, diallyl phthalate silicone, and polyurethane thermosetting resins are used. Alternatively, use metal, ceramic, 7x, etc.

In addition, polymer gel fine particles (hereinafter referred to as polymer gel)
As a method for coating the carrier, there is a dipping method in which the thermoplastic carrier is immersed in polymer gel particles and pulled up. Alternatively, there is a method in which the above-mentioned fresh cream-like polymer gel particles containing the above-mentioned thermoplastic resin powder are diluted or sprayed onto a thermoplastic carrier using a spray gun or the like without being diluted in water or a solvent. Furthermore, there is also a roll coater method in which the polymer gel particles are attached to a roll and coated onto a thermoplastic carrier.

In addition, in the above method, the thermoplastic resin powder is not added from the beginning, but the thermoplastic resin powder is added to and mixed with the polymer gel particles collected after one reaction, and then this is applied to the thermoplastic carrier in the same manner as above and dried. There is also a method in which the heating is performed afterward. In this case, the reaction of the organic polymer compound is carried out by suspension polymerization or emulsion polymerization.

That is, in this method, an organic polymer compound having a fuel trapping function is dissolved in a solvent, and then the solution is added to a separately prepared dispersant-containing solution with stirring to obtain the crosslinking agent for the organic polymer compound reaction. The reaction was carried out in the presence of 1 reaction, and after the completion of one reaction, the polymer gel fine particles were collected, and then a thermoplastic resin powder was added and mixed with the cough polymer gel fine particles, and then applied to a thermoplastic carrier in the same manner as in the above method, This is a method of heating to the above-mentioned fusion temperature after drying.

The fuel #4 absorber with a carrier obtained as described above has basically the same shape as the thermoplastic carrier, but it can be further shaped into a desired shape such as a honeycomb shape, a plate shape, a film shape, etc. etc. can also be made.

However, when the thickness increases, only the surface swells, and absorption does not proceed to the inside, which may reduce absorption capacity. Therefore, it is preferable that the diameter or thickness of the fuel absorber is 5 mm or less.

In addition, the fuel absorber according to the present invention captures evaporated fuel (
(absorption), but is insoluble in fuel. Therefore, by purging the captured fuel, it can be regenerated and its use can be repeated.

Note that the fuel absorber of the present invention can be used not only for automobile canisters but also for various fuel evaporation prevention devices such as boiler fuel tanks.

[Operations and Effects] In the present invention, since the fuel absorber obtained by the above manufacturing method is based on the above-mentioned '4ir41g polymer compound, it has a high trapping ability for evaporated fuel. . This high trapping ability is based on the ability of this organic polymer compound to absorb fuel such as gasoline and swell. This is due to the high affinity between the above-mentioned polymeric compound and the evaporated fuel.

In addition, since the fuel absorber has one particulate polymer bonded to each other by the thermoplastic resin powder, the overall strength is improved.

In addition, since the fuel absorber has a thermoplastic carrier as its skeleton, its overall strength is high, and the thermoplastic carrier is made by fusing the fine particulate polymer with its material, such as a thermoplastic resin. Therefore, the bond between the two is strong.

Therefore, it has excellent durability against the adsorption/desorption cycle of fuel capture and release.

Further, since thermoplastic resin powder is used as the binder, the thermoplastic resin can be uniformly adhered to the surface of the finely divided polymer, and the binder can be easily added.

In addition, since the above organic polymer compounds are chemically bonded to each other through two reactions, the obtained fuel absorber is
It has a three-dimensional structure. Therefore, the entire structure 5 is highly flexible and has a high fuel trapping ability.

Further, since the fine particulate polymer layer is provided on the surface of the thermoplastic carrier, the fine particulate polymer layer has a large surface area ratio to its volume. Therefore, the fuel absorption capacity per unit weight of the particulate polymer is high.

The fuel absorber, which swells by absorbing evaporated fuel, releases the trapped fuel during the process of purging the inside of the fuel evaporation prevention device, and its fuel absorption capacity is restored, allowing continued use. can do.

As described above, according to the present invention, it is possible to provide a method for manufacturing a fuel absorber that has excellent durability against one fuel adsorption/desorption cycle and has an excellent ability to capture evaporated fuel.

〔Example〕

First Example Regarding the method for manufacturing a fuel absorber according to an example of the present invention,
This will be explained using FIG.

First, as an organic polymer compound with fuel capture function,
Ethylene-propylene-ethylidene norbornene polymer (Japan Synthetic Rubber EP33゜ethylene-propylene-
Diene copolymer) 20g was dissolved in toluene, 10%
(Weight ratio, same below)) 8 liquids (liquid volume 200g)
).

Further, 13 g of PE resin was added to the above solution as a thermoplastic resin powder for a binder and mixed (solution amount: 213 g). The particle size of the thermoplastic resin powder was about 30 μm.

To this solution, 20 parts of Hensil peroxide as a crosslinking agent was added and dissolved in terms of pure product (100%) based on 100 parts (parts by weight, hereinafter the same) of the polymer. Further, 20 parts of divinylhenzene as a crosslinking aid was added to 100 parts of the polymer and dissolved. Bubbling N2 gas into the polymer solution prepared in this way,
Deoxygenation treatment was performed to remove dissolved oxygen in each method.

On the other hand, put polyvinyl alcohol (PVA) as a dispersant (polymerization degree 500, saponification degree 86.5) into a pressure-resistant container.
~89 mol%) of 1% water? Prepare 8 liquids (solution amount 64
0g). Then, a dispersion stirrer was fixed to the top of the pressure container, and the container was sealed.

Next, after evacuating the inside of the pressure-resistant container, the operation of filling it with N2 gas was performed three times, and the PVA water? Deoxygenation treatment was performed to remove dissolved oxygen in tjH.

Thereafter, the deoxidized polymer solution was poured into a PVA aqueous solution in a pressure-resistant container and stirred at high speed using the dispersion stirrer to prepare 5 dispersions.

Further, after the polymer solution had finished flowing in, the inside of the pressure-resistant container was subjected to deoxidation treatment in the same manner as described above, and stirring was continued for 15 minutes.

Next, the dispersion stirrer was replaced with a simple propeller stirrer, and the reaction solution in the pressure vessel was stirred at 120 to 300 rpm while raising the temperature to 92°C. After reaching 92°C, the stirring was continued for another 6 hours, and then a 20% toluene solution of an antioxidant (polymerization inhibitor) was added to the reaction solution to stop one reaction.

After the reaction was completed, the pressure container was cooled with ice water and left at room temperature for 3 hours. As a result, the fresh cream-like polymer gel particles are separated in the lower layer 1 and the aqueous solution in the lower layer 2. Therefore, the upper layer of polymer gel particles is collected. Thereby, polymer gel fine particles were obtained, which were composed of fine polymer particles produced by the reaction of the organic polymer compound and thermoplastic resin powder adhering to the surface of the polymer particles.

This was then applied to the surface of the thermoplastic carrier.

Granules of PE material with a diameter of 1.5 mm were used as the core thermoplastic carrier. Further, the above coating was performed using a dipping method.

Furthermore, the intermediate is heated at a temperature higher than the temperature at which the PE resin as the thermoplastic resin powder fuses (150°C), and at a temperature at which the PE resin as the thermoplastic carrier fuses (150°C).
The mixture was heated for 3 minutes as described above. As a result, two granular fuel absorbers according to the present invention were obtained. This fuel absorber is designated as sample No. 1.

As shown in the model in FIG. 1, the fuel absorber manufactured in this way includes fine particulate polymer 50 produced by the crosslinking reaction of the organic polymer compound and the particulate polymer 50 attached to the surroundings thereof. thermoplastic resin powder layer 52
and a thermoplastic carrier 60 supporting them.

That is, the thermoplastic resin powder layer 52 is fused to become a binder, which joins each particulate polymer 50, and these are bonded to the surface 5 of the thermoplastic carrier 60 to constitute the fuel absorber 5 with a carrier. ing.

Then, between the fine particulate polymer 50 and the thermoplastic carrier 60, the thermoplastic carrier 60 and the thermoplastic resin powder layer 5
2 are fused together.

Second Example In the first example above, the thermoplastic resin powder was not added from the beginning, but the thermoplastic resin powder was added and mixed with the fresh cream-like polymer gel fine particles collected after one reaction.

This was then applied to a thermoplastic carrier.

The thermoplastic carrier has a core portion 62 as shown in FIG.
A granular thermoplastic carrier 6 consisting of a surface layer 63 and a surface layer 63 was used. Here, the core portion 62 was made of PP material, and the surface layer portion 63 was made of PE material. The core portion 62 has a diameter of approximately 0.8 mm and the surface layer portion 63 has a thickness of approximately 0.1+nm.

The addition ratio of the thermoplastic resin powder to the organic polymer compound was the same as in the first example.

Next, as described above, the material coated on the thermoplastic carrier is heated to 150° C., which is higher than the melting temperature of the thermoplastic resin powder and the surface layer portion 63 of the thermoplastic carrier.
A fuel absorbent with a carrier according to the present invention was obtained. Others are 1
This is the same as the first embodiment.

The thus obtained fuel absorber is, as shown in FIG. 2, in which fine particulate polymer 50 is fused to the surface of a thermoplastic carrier 6 consisting of a core portion 62 and a surface layer portion 63. . Each particulate polymer 50 is fused with thermoplastic powder 52 on its surface. This fuel absorber will be referred to as Sample 2.

Third Embodiment The first example above. Obtained in the second example. Sample No. 12
The characteristics of the fuel absorber were measured.

That is, first, regarding the fuel adsorption/desorption cycle durability, the fuel absorbers were placed in a 100 mesh stainless wire mesh container and immersed in toluene for 24 hours. Then, a load was applied from above to the fuel absorber immediately after it was taken out, and the crushing load (gf) at the time of crushing was measured.

As for the fuel capture ability of the fuel absorber, first about 0.2 g of a sample (including 0.1 g of thermoplastic carrier) is placed in a wire mesh container (weight: ■) similar to the above and weighed. One weight at this time is assumed to be W. Then, each sample was placed in a wire mesh container.
It is immersed in toluene as a fuel, taken out at intervals shown in Table 1, and its weight Y is weighed.

Then, the fuel absorption layer (%) for each hour was calculated using the following formula.

The measurement results are shown in Table 1.

For comparison, in Example 1, the reaction was carried out without adding thermoplastic resin powder as a binder, and fresh cream-like polymer gel particles were collected. Then, it is granulated to obtain a fuel absorber without applying it to a thermoplastic carrier. This is designated as sample No. CI. The measurement results are also shown in Table 1.

As can be seen from Table 1, all of the fuel absorbers according to the present invention (sample Nα1.2) exhibit a higher crushing load than the comparative sample NαC1. This is because each particulate polymer is bonded by the thermoplastic resin powder as a binder, and these particles are also bonded by the fusion of the thermoplastic carrier, giving the heat absorber as a whole a high strength.

Therefore, the fuel absorber of the present invention exhibits excellent durability against fuel adsorption and desorption cycles.

Furthermore, regarding the fuel trapping performance, it can be seen that it exhibits a high degree of absorption.

On the other hand, comparative sample C1, which does not use thermoplastic resin powder as a binder and thermoplastic carrier,
Although the absorption is very high, the crushing load during fuel absorption is quite low because the particulate polymer is not bound by a thermoplastic carrier or even a thermoplastic carrier. Therefore, the durability of the adsorption/desorption cycle is poor.

Fourth Embodiment An example in which the fuel absorber of the present invention is used in an automobile canister will be explained with reference to FIG.

As shown in the figure, the wooden canister 1 includes a main body 10, which is a container for accommodating a fuel absorber, and an absorption chamber 2 in the main body IO.
The fuel absorber 20 is filled with a fuel absorber 20.

The main body 10 has a cylindrical shape, and a lid 11 is provided at the upper end of the main body 10.
and a bottom plate 12 provided on the bottom surface. In addition, a second introduction pipe 14 with a tip 141 inserted into the lid 11 up to the vicinity of the center of the absorption chamber 2. The first introduction pipe 13 inserted in the same way
．． and fix the purge pipe 16.

The first introduction pipe 13 communicates with the space above the carburetor float chamber 81, and the second introduction vibe 14 communicates with the fuel tank 82. Further, the purge pipe 16 communicates with a purge port 85. Further, a purge air pipe 15 is opened in the bottom plate 12. Each of the above pipes has a respective valve 131142.151.161.

Further, within one main body 10, a perforated plate 17 is disposed below one absorption chamber 2, and a perforated plate 18 is disposed above one absorption chamber 2.

Further, the perforated plate 17 is pressed upward by a spring 101, and the perforated plate 18 is pressed downward by a spring 102. In addition, in the same figure, 8 is gasoline.

However, the capture of the fuel from the fire by this canister 1 is as follows.
As mentioned above, the carburetor float chamber 81 or the fuel tank 8
Gasoline vapor evaporated in step 2 enters the absorption chamber 2 in the canister 1 through the first or second introduction pipe 13, 14, contacts the fuel absorber 20, and is absorbed therein. During this absorption, the valve 131142 of the introduction pipe 13.14 is opened, and the valve 161 of the purge pipe 16 and the valve 151 of the purge air vibe 15 are closed.

The above absorption occurs when the fuel absorber 20 traps gasoline and swells.

When these fuel absorbers have absorbed a large amount of gasoline vapor, the fuel absorbers are regenerated. After repeated use, the lid 11 is removed and replaced with a new fuel absorber.

The above reproduction is based on the above answer 131.142, 151.16.
Open and close 1 in the opposite direction to the above for absorption.

This is done by supplying air from the purge air vibrator 15. Then, exhaust gas is discharged from the upper purge pipe 16 to the parts port 85. At this time, the introduced air serves to separate the gasoline absorbed by the fuel absorber and discharge it as described above.

By carrying out the adsorption/desorption cycle of absorption and regeneration as described above, the fuel absorber can be used repeatedly and gasoline brown vapor as evaporated fuel can be captured with high efficiency.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the bonding state of fine particulate polymers in the fuel absorber with a carrier of the first embodiment, FIG. 2 is an explanatory diagram of the bonding state of the fine particulate polymers in the fuel absorber with a carrier of the second embodiment, The third figure is an explanatory diagram of the canister in the fourth embodiment. 101. Canisk 20°8°5°50°52°63°3. absorption chamber. 0. Fuel absorber 0. Gasoline 1. Fuel absorber 1. Particulate polymer9. Thermoplastic resin powder layer 60, . . . Thermoplastic carrier 8. Core material part 11 surface layer Toyoda Gosei Co., Ltd. Toyota Central Research Institute Co., Ltd. Agent Patent attorney Yoshiyasu Takahashi

Claims (3)

[Claims] (1) An organic polymer compound having a fuel trapping function is dissolved in a solvent, a thermoplastic resin powder for a binder is added and mixed to the solution, and then a reaction is performed in the presence of a crosslinking agent for the reaction of the organic polymer compound. After completion of the reaction, collect the polymer gel containing the thermoplastic resin powder, apply it to a thermoplastic carrier, dry it, and apply it to the surface of the thermoplastic carrier at a temperature at which the thermoplastic resin powders fuse together. 1. A method for producing a fuel absorber, the method comprising heating the fuel absorber to a fusion temperature of 100 to obtain a fuel absorber with a carrier. (2) Dissolve an organic polymer compound with a fuel capture function in a solvent, then add the solution to a separately prepared dispersant-containing solution while stirring to perform a reaction, and collect polymer gel particles after the reaction is complete. Next, a thermoplastic resin powder is added and mixed with the polymer gel fine particles, and then this is applied to a thermoplastic carrier and dried. A method for manufacturing a fuel absorber, which comprises heating the thermoplastic resin powder to a temperature at which the thermoplastic resin powder fuses and to a temperature at which the surface of the thermoplastic carrier fuses to obtain a fuel absorber with a carrier. (3) In the first or second claim, the thermoplastic carrier consists of a core part and a surface layer part provided on the surface thereof, and the surface layer part has a lower melting point than the core part. A method for manufacturing a fuel absorber characterized by: