JP2000328323A - Heat insulating protective clothing and formation of gas layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten protective clothing wearable in handling a very low- temperature liquid. SOLUTION: In this heat insulating protective clothing 10, an air bag 15 is attachable to and detachable from the inside of a protective clothing 11 having durability to a very low temperature and high temperature. The air bag 15 has a shape of covering human trunk parts such as chest part and abdominal part of body, is inserted into a pocket 13 and can be fixed by a Hook-and- Loop fastener 14. Since the air bag is lightweight and a gas layer in the interior has an preferable heat insulating effect, the air bag effectively protects a wearer of the heat-insulating protective clothing 10. Generally the air bag 15 is not expanded and is made to expand in the occurrence of a sudden leakage accident, an ordinary operation in wearing the heat-insulating protective clothing 10 can be readily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cryogenic liquid and a flammable gas represented by liquefied natural gas (hereinafter abbreviated as "LNG") leaked due to a sudden accident or the like. TECHNICAL FIELD The present invention relates to a heat-insulating protective suit used in such a case and a method for forming a gas layer used in the heat-insulating protective suit.

[0002]

2. Description of the Related Art In workplaces or transport vehicles that handle cryogenic liquids typified by liquid nitrogen and LNG, they are used as winter clothing during the winter season and are safe in the event of a sudden accident of leakage of the cryogenic liquid. It is necessary to provide work clothes that enable emergency evacuation and emergency repair. Especially LN
At workplaces or vehicles that handle flammable gas cryogenic liquids represented by G, safe evacuation should be taken even if the cryogenic liquid leaked due to a sudden accident ignites and burns for some reason. Must be possible. If sudden cryogenic liquid leakage is expected at workplaces handling cryogenic liquids, a specially applied workwear that can be safely evacuated, saves lives, and repairs leaks in an emergency should the leakage occur. There is one proposed in Hei 9-283921.

FIG. 18 shows the fabric structure of cold-resistant workwear proposed in Japanese Patent Application No. 9-283921. On the outermost side, an outer layer made of a base fabric 1 made of an aromatic polyamide fiber woven fabric is arranged. On the inside of the base cloth 1, a cloth constituting a lining 2 called an inner is arranged. An aromatic polyamide fiber woven fabric 3 is disposed as the first lining on the outermost side of the inner. The inside of the aromatic polyamide fiber woven fabric 3 is coated with a moisture-permeable waterproof film 4 made of a memory-shaped polymer. A 4 mm-thick batting 5 made of aromatic polyamide fiber felt is inserted inside the moisture permeable waterproof film 4, and an aromatic polyamide fiber woven fabric 6 as a second lining is disposed inside the batting 5. The batting 5 and the aromatic polyamide fiber woven fabric 6 are integrated by quilting.

[0004]

If work clothes having a cloth structure as shown in FIG. 18 are worn, it is safe emergency to prevent sudden leakage of cryogenic liquid at a work place handling cryogenic liquid. Although evacuation, rescue of lives, and emergency repair of leaks are possible, work clothes are heavy, about 6 kg.
Not active. For this reason, it is difficult to always wear it, and it takes a long time to wear it alone. For the batting 5 used as a material for the quilting process, various measures are required in order to satisfy the standard of antistatic work clothes defined by JIS T 8118 in order to frequently use flame-retardant chemical fiber felt.

[0005] An object of the present invention is to provide a heat-insulating protective suit which is lightweight and can improve the heat insulating property, and a method for forming a gas layer suitable as a heat-insulating layer of the heat-insulating protective suit.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to an insulated protective garment comprising: a protective garment having resistance to external temperature; and a heat insulating layer provided inside the protective garment and holding gas. is there.

According to the present invention, since the protective clothing has resistance to external temperature, it is possible to wear the protective clothing and perform necessary activities such as when cryogenic liquid leaks. Since a heat insulation layer that holds gas is provided inside the protective clothing,
The influence of the external temperature can be hardly transmitted to the wearer of the protective suit. Since the heat insulating layer holds gas, it is possible to exhibit a lightweight and effective heat insulating effect.

[0008] Further, in the present invention, the heat insulation layer is detachable inside the protective clothing.

According to the present invention, since the heat-insulating layer is detachable inside the protective clothing, the operation of wearing the thermal insulating layer only in an emergency, and removing the heat-insulating layer and wearing the protective clothing in non-emergency situations can be performed. Can be easier. Even if the thermal insulation layer is removed, the protective clothing is resistant to external temperatures, so even if leakage of cryogenic liquid etc. occurs due to a sudden accident, wear it until the thermal insulation layer is installed inside the protective clothing Can be protected. If a heat insulating layer is attached inside the protective clothing, it is possible to protect the wearer for a longer time.

In the present invention, the heat insulating layer is a gas layer capable of supplying and expanding a gas, and is provided with gas supply means for supplying air to the gas layer to expand the gas layer.

According to the present invention, since the heat insulating layer is a gas layer capable of supplying and expanding a gas, the weight can be easily reduced. Since the gas layer expands by supplying gas from the gas supply means, if the liquid layer expands with the gas, the heat insulating effect can be further improved, and the wearer can be effectively protected from external temperature. Good activity can be maintained in a state where the gas layer is not expanded.

In the present invention, the gas supply means includes a temperature detector for detecting a temperature of the outside air, and a control for starting expansion of the gas when the temperature detector detects a predetermined low temperature or high temperature. And a device.

According to the present invention, the gas supply means includes a temperature detector for detecting the temperature of the outside air, and a control for starting the expansion of the gas when a predetermined low or high temperature is detected by the temperature detector. Including the device, when the cryogenic liquid leaks, or when the temperature rises due to the ignition of LNG, etc., the gas layer can be expanded to automatically protect the wearer effectively. it can.

Further, according to the present invention, as a material for forming the gas layer, aromatic polyamide, polyimide, polytetrafluoroethylene, vinyl fluoride polymer, flame-retardant grade polyethylene terephthalate, or aromatic resin coated with a fluorine resin is used. It is characterized in that either polyamide or aromatic polyamide coated with a silicone resin is selected.

According to the present invention, for example, aromatic polyamide, polyimide, polytetrafluoroethylene, vinyl fluoride polymer, and flame retardant which do not lose flexibility even at a low temperature of -100 ° C. and are insoluble at a high temperature of 150 ° C. Either grade polyethylene terephthalate, fluororesin coated aromatic polyamide, or silicone resin coated aromatic polyamide is selected as the material forming the gas layer, so it expands at low or high temperatures As a result, an effective heat insulating effect can be achieved.

In the present invention, the heat insulation layer is formed of carbon fiber felt.

According to the present invention, since carbon fiber felt is used as the heat insulating layer, the bulk specific gravity is small and the weight can be reduced. Further, since the carbon fiber felt has conductivity, it is possible to eliminate the possibility of igniting the combustible gas due to static electricity.

In the present invention, the heat insulation layer is formed of an aromatic polyamide fiber felt.

According to the present invention, since the aromatic polyamide fiber felt is used as the heat insulating layer, the bulk specific gravity is reduced,
The weight can be reduced.

Further, in the present invention, the heat insulation layer has a shape that covers the trunk of the body when the protective clothing is worn on the body.

According to the present invention, the trunk of the body can be covered with the heat-insulating layer when the protective clothing is worn on the body, so that the trunk, such as the chest and abdomen, is fatal when exposed to low or high temperatures. Minutes can be effectively protected.

Further, in the present invention, the protective suit is characterized in that a batting of carbon fiber felt is provided between the base cloth on the front side and the lining on the back side.

According to the present invention, as the batting in the protective clothing,
The presence of the carbon fiber felt prevents generation of static electricity from the protective clothing and eliminates the possibility of ignition when handling combustible gas.

Further, the present invention is a method for forming a gas layer provided inside a protective garment having resistance to an external temperature and expandable by a gas, wherein a cloth of an aromatic polyamide fiber is made of a fluorine-based resin or a silicone-based cloth. A method of forming a gas layer, characterized in that a bag is formed by coating with a resin, and the bag forms a removable gas layer inside the protective clothing.

According to the present invention, it is possible to form a gas layer by applying a gas to a bag formed by coating a cloth of an aromatic polyamide fiber with a fluorine-based resin or a silicone-based resin and supplying a gas to the bag. Therefore, an effective gas layer can be obtained at both extremely low and high temperatures, and the heat insulating effect of the gas can be effectively exhibited.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration of a heat-insulating protective garment 10 according to an embodiment of the present invention, in which a rear surface is developed. The heat-insulating protective clothing 10 is provided with a pocket 13 on the surface of a lining 12 of the protective clothing 11 and a hook-and-loop fastener 14 inside the pocket 13. An airbag 15 serving as a heat insulating layer is housed in the pocket 13 and can be fixed by the hook-and-loop fastener 14. The airbag 15 can inflate by supplying air when the protective clothing 11 is worn on the body. The airbag 15 is provided with a silicone tube 16 as a gas supply means and a valve 17 with a check valve.
In the wearing state, the wearer can blow air from the mouth from the valve 17 with the check valve and inflate the air.

FIG. 2 shows the shape of the airbag 15 shown in FIG. The airbag 15 has a shape that covers the front surface of the trunk such as the chest and abdomen of the body when the protective clothing 11 of FIG. 1 is worn on the body. The airbag 15 is provided separately on the left and right sides, and can be inserted into the pocket 13 of FIG. 1 and inflated as needed. In addition, airbag 1
5 can be inserted or pulled out of the pocket 13 even in the inflated state, and can be removed and stored in the inflated state when unnecessary, and can be worn in the inflated state when necessary. it can. Further, the airbag 15 can be attached and detached in an intermediate inflated state, and if necessary, the airbag 15 can be inserted into the pocket 13 to further inflate.
Since the airbag 15 performs a heat insulating action by an air layer held inside, it is preferable to inflate the air layer so as to increase the thickness of the air layer in terms of the heat insulating effect. However, when the airbag 15 is inflated, workability when wearing the heat-insulating protective clothing 10 is deteriorated.
It is preferable not to inflate the airbag 15.

FIG. 3 shows a fabric configuration of the protective clothing 11 of FIG. FIG. 3A shows the configuration when the airbag 15 is not inflated, and FIG. 3B shows the configuration when the airbag 15 is inflated. The fabric is composed of a base cloth 2 made of an aromatic polyamide fiber woven cloth from the outside as work clothes.
1, a lining 22 and an air layer 23 formed by the airbag 15. The back side of the base cloth 21 is coated with a porous fluororesin polymer as a moisture-permeable waterproof film 24. Between the base cloth 21 and the lining 22, a batting 25 made of aromatic polyamide fiber felt and having a thickness of 2 mm is inserted. The lining 22 of the batting 25 is quilted and integrated so that the batting 25 is not biased. The airbag 15 is formed of a woven fabric made of a flame-retardant fiber coated with a flame-retardant polymer film or an air-tight film, and has a pocket 13 made of an aromatic polyamide fiber woven fabric.
To the lining 22. In addition, as the aromatic polyamide fiber woven fabric, for example, one sold under the trademark “Cornex” by Teijin Limited can be used. The moisture permeable waterproof film 24 is marketed by each company under a trademark such as “Gore-Tex” and “Micro-Tex”.

FIG. 4 shows a schematic configuration of an apparatus 30 for testing the heat insulation performance of the airbag 15 used in the heat-insulating protective clothing 10 of the present embodiment. FIG. 4A shows a state in which the test apparatus 30 is viewed from the front, and FIG. 4B shows a state in which the test apparatus 30 is viewed from the bottom. The single tube 31 is made of stainless steel, and the upper end in the axial direction is
The lid 32 made of stainless steel is sealed by welding. The lower end side in the axial direction of the single tube 31 is open, and a stainless steel flange 33 is attached around the opening. On the lid 32,
A stainless steel pipe 35 for injecting liquid nitrogen 34,
A pipe 36 for releasing nitrogen gas is attached.

In order to test a fabric such as the airbag 15, the airbag 1 is placed between the flange 33 and the flange 37.
5 and the like, and the space between the flange 33 and the flange 37 is tightened with the bolt 38. In this state, the space inside the single pipe 31 is closed except for the pipes 35 and 36. Pipe 3
From 5, liquid nitrogen 34 is injected, and the nitrogen vaporized and expanded in the single pipe 31 is released from the pipe 36 to the atmosphere.
A pressure gauge 39 for measuring the pressure of nitrogen in the single tube 31 is provided. Liquid nitrogen 34 is injected from the pipe 35 so that the pressure measured by the pressure gauge 39 becomes ² kgf / cm ² G.

FIG. 5 shows the result of measuring the temperature of the fabric such as the airbag 15 at the center of the lower surface as shown in FIG. In FIG. 5, a circle plot shows a temperature change when only the cloth of the protective clothing 11 of FIG. 1 is used, that is, only the base cloth 21 and the lining 22 of FIG. It shows the temperature change when inserting. By inserting the airbag 15, an improvement in heat insulation of about 30 ° C. is recognized. The plots with triangles show the test results for the fabric of the cold-resistant clothes proposed in Japanese Patent Application No. 9-283921 as shown in FIG. It is recognized that the heat resistance when the airbag 15 of the present embodiment is inserted is improved by about 10 ° C. with respect to the cold-resistant clothing cloth.

FIG. 6 shows the shape of the airbag 15 of the present embodiment in which the inside is divided into small booths. The broken line in the figure represents the bonding portion. The size of the airbag 15 is
It has the same area as the front body. "Type 1" is divided into intermittent vertical lines, diagonally divided at the center, "Type 3" is divided into continuous vertical lines, and "Type 4" is intermittent. Booths are divided by vertical and horizontal lines, and "Type 5" is a diagonal booth without leaving much of the center area, and "Type 6" is a booth where the intermittent portions of vertical and horizontal lines intersect alternately. “Type 7” is divided into booths so that many small bubbles are formed.

FIG. 7 shows the airbag 15 of each type shown in FIG.
Test device 40 for measuring the time required to inflate
The schematic configuration of is shown. The air bag 15 is provided with a chirp 41 for air injection, and air is injected from a pump 43 via a gas flow meter 42, and the air injection amount and the injection time are measured. The injection pressure is set at 40 mmHg, assuming the expiration pressure of an adult male, and the pressure is controlled by a pressure gauge 44. The test results are shown in Table 1 below.

[0034]

[Table 1]

As a result of the test, it was found that the type 4 and type 6 airbags 15 having a relatively uniform thickness can be obtained. In the type 2 and the type 5 which were bonded in the diagonal direction, a tendency that wrinkles were formed at the end of the bonded portion was observed. Also,
As the number of booths increased, the amount of air (internal volume) required for inflation was reduced, and the thickness of the airbag 15 tended to be reduced. Next, the time required to inflate the airbag 15 depends on the internal capacity, and the result is that the larger the number of divided booths, the shorter the time required for inflation. In the present embodiment, Type 6 is based on a uniform thickness that can be obtained and that has a short expansion time.

FIG. 8 shows an outline of a liquid nitrogen irradiation test for testing the protective action against low temperatures. In the test, liquid nitrogen 46 was applied at a pressure of 2 kgf / cm ² G and a distance of 50 cm to a thermal mannequin 45 in which cotton underwear and cotton polyester work clothes were mounted, and the heat-insulating protective clothing 10 according to the present embodiment was mounted thereon. Irradiation is performed from two front directions under test conditions, and the change in the surface temperature of the thermal manikin 45 is measured. FIG. 8A shows the test state in a side view, and FIG. 8B shows the test state in a plan view. The ejection amount of the liquid nitrogen 45 is 300 cc per second.

FIG. 9 shows the temperature change on the surface of the thermal manikin 45 in the liquid nitrogen irradiation test shown in FIG. The black circles indicate the temperature change when the cold-resistant clothing having the fabric structure shown in FIG. 18 is attached to the thermal mannequin 45, and the white circles indicate the thermal manikin 45 in the heat-insulating protective clothing 10 of the present embodiment in a state where the airbag 15 is not inflated. Shows a temperature change when the airbag 15 is inflated, and a triangle mark shows a temperature change when the airbag 15 is inflated. In the heat-insulating protective clothing 10 in which the airbag 15 is not inflated, a temperature drop of about 45 ° C. is observed in 15 minutes, but the temperature drop when the airbag 15 is inflated is about 15 ° C. in 15 minutes of irradiation with liquid nitrogen. , Showing excellent heat insulating properties. In the cold-resistant clothes made of the cloth of FIG. 18, a temperature drop of about 20 ° C. was observed in 15 minutes of irradiation with liquid nitrogen, and the excellent heat-insulating performance of the heat-insulating protective suit 10 according to the present embodiment was proved.

Next, the flame protection of the heat-insulating protective clothing 10 of this embodiment will be described. As a test method for evaluating the fire protection of a firefighting suit or the like, there is a fire protection test according to ISO DIS9151. In this test, one side of the test fabric (actually, the front fabric side of a firefighting suit, etc.) is exposed to a gas burner flame having a calorific value of 80 KW / m ² , and the time required for the temperature of the fabric surface on the opposite side to rise by 24 ° C. is measured. Things. And
This time is set to 15 seconds as a guide for firefighting suit development. Therefore, a flame protection test of the thermal insulation protective clothing 10 of the present embodiment was performed. The test results are shown in Table 2 below.

[0039]

[Table 2]

The temperature rise time at 24 ° C. is 16.5 seconds even for the cloth in which the airbag 15 is not inflated, and 22.3 seconds for the cloth in which the airbag 15 is inflated,
Shows better fire protection than regular firefighters. In addition, each component fabric is made of flame-retardant aromatic polyamide 100%
Considering the use of carbon fiber and carbon fiber, it is illuminated that the heat-insulating protective clothing 10 of the present embodiment is a work clothing that can be sufficiently used in firefighting activities in the event of a fire.

FIG. 10 shows a schematic shape of an airbag 50 as another embodiment of the present invention. The airbag 50 of the present embodiment has a life jacket type shape that protects the front and back of the body. The front and back are
Connected by shoulders. The internal volume of the airbag 50 is about 7 liters in total, and can be inflated in about 30 seconds by a standard expiration of an adult male. The internal volume of the airbag 15 shown in FIG. 2 is about 3.5 l for both, and can be inflated in 4 to 5 seconds by the exhalation of an adult male.

FIG. 11 shows a silicone tube 5 as a gas supply means for inhaling expiration into the airbag 50 of FIG.
1 and a state in which a valve 52 with a check valve is provided. Such an airbag 50 can be used in an emergency in the same manner as a life jacket provided on an aircraft or the like.
1 can be added to the mouth and inflated by exhalation.

FIG. 12 shows a configuration for automatically inflating the airbags 15, 50 as still another embodiment of the present invention. Gas such as air is compressed and stored in the high-pressure cylinder 55, and the control device 57 controls the on-off valve 56,
If the gas in the high-pressure cylinder 55 is supplied into the airbags 15, 50, the airbags 15, 50 can be instantaneously inflated. A temperature detector 58 is connected to the control device 57, detects the temperature outside the protective clothing, and when the external temperature reaches a preset low temperature, for example, −100 ° C., or a high temperature, for example, 150 ° C., the on-off valve 56. Is opened and the gas in the high-pressure cylinder 55 is controlled so as to inflate the airbags 15 and 50. As a gas supply means for supplying a gas for inflating the airbags 15 and 50, for example, as is practically used in a fire extinguisher or the like, a gas is generated chemically or inflated similarly to an airbag device of an automobile. It is also possible to adopt a configuration in which the control is performed.

The materials for forming the airbags 15 and 50 include aromatic polyamides, polyimides, polytetrafluoroethylene, vinyl fluoride polymers, and flame-retardant grades sold under trademarks such as “Teflon”. PET
(Polyethylene terephthalate) is preferably used. In particular, an aromatic polyamide coated with a fluorine-based resin or a silicone-based resin is preferable because it is flexible even at extremely low temperatures and hardly melts even at high temperatures. When the airbags 15 and 50 are formed of such a material, they may be formed as a bag and bonded as shown in FIG.

FIG. 13 shows a fabric structure using a felt heat insulating material 60 instead of a gas layer as a heat insulating layer, as still another embodiment of the present invention. In this embodiment, portions corresponding to the fabric configuration shown in FIG. 3 are denoted by the same reference numerals, and redundant description will be omitted. The felt heat insulating material 60 is detachable from the heat insulating protective clothing 10 shown in FIG. The felt insulation 60 is made of carbon fiber felt 62.
Is sewn by sandwiching it with an aromatic polyamide fiber woven fabric 63.

FIG. 14 shows a state in which the felt heat insulating material 60 is formed in the shape of the front body, and is attached to and detached from the lining 22 with the cotton fastener 61. FIG. 15 shows a configuration in which the felt heat insulating material 60 is formed so as to cover the front and back surfaces of the trunk portion, and is detachable from the lining 22 via the cotton fastener 61.

FIG. 16 shows a test result obtained by performing a heat insulating test of the felt heat insulating material 60 of the present embodiment using the test apparatus 30 shown in FIG. The black circles indicate the test results with the felt heat insulating material 60 removed, and the triangles indicate the test results when the felt heat insulating material 60 is used. For comparison, the test results for the fabric of the cold-resistant clothes shown in FIG. 18 are shown by white circles. When the felt heat insulating material 60 is mounted, the heat insulating property is improved by about 25 ° C. as compared with the case where the felt heat insulating material 60 is not mounted.
Further, an improvement in the heat insulating property of about 5 ° C. is recognized as compared with the cold-resistant clothing cloth shown in FIG.

FIG. 17 shows the felt heat insulating material 6 of this embodiment.
For 0, a test result of a liquid nitrogen irradiation test as shown in FIG. 8 is shown. Black circles indicate the state where the felt heat insulating material 60 is mounted, and triangles indicate the state where the felt heat insulating material 60 is removed. In a state in which the felt heat insulating material 60 is not mounted, a temperature drop of about 40 ° C. is observed in 15 minutes, but in a state in which the felt heat insulating material 60 is mounted, about 15 ° C.
, Indicating excellent heat insulation. Further, in the cold-resistant clothing fabric shown in FIG. 18, a temperature drop of about 20 ° C. is observed in 15 minutes as indicated by white circles, and the excellent heat insulating performance of the felt heat insulating material 60 of the present embodiment is illuminated. As the felt heat insulating material 60, it is preferable to use carbon fiber felt. Since the bulk density of the carbon fiber felt is 12 kg / m ³ and the bulk density of the aromatic polyamide fiber felt is 65 kg / m ³ , if the felt heat insulating material 60 is made of carbon fiber felt, the felt is made of aromatic polyamide fiber. The weight can be reduced by about 1.6 kg as compared with the case where the heat insulating material 60 is formed. FIG.
In the fabric configuration shown in FIG. 8, an aromatic polyamide fiber felt was used as the heat insulating layer.
With the number of sheets reduced, the weight can be further reduced by 1.4 kg, and the total weight can be reduced by 2.5 kg. Insulated protective clothing, 2.5 kg lighter without compromising low-temperature insulation performance and flame protection, and easy to install, allowing for quick response to accidents and disasters while maintaining insulation performance And it is possible to have exercise functionality equivalent to that of ordinary winter clothing or firefighting clothing.

In this embodiment, the same flame protection test as in Table 2 was performed, and good results as shown in Table 3 were obtained.

[0050]

[Table 3]

[0051]

As described above, according to the present invention, a heat insulating layer for holding a gas is provided inside a protective garment, and the weight can be reduced to effectively protect a wearer.

Further, according to the present invention, since the heat insulating layer is detachable inside the protective clothing, work and the like can be easily performed by wearing the heat insulating clothing in a state where the heat insulating layer is not mounted. Wearing can effectively protect the wearer.

Further, according to the present invention, since the heat insulating layer is a gas layer which can be expanded by gas, it is not expanded when unnecessary, but is expanded only when necessary, and does not impair workability when unnecessary, and is more effective when necessary. The heat insulation effect can be exhibited.

Further, according to the present invention, when the temperature of the outside air reaches a predetermined low or high temperature, the gas layer automatically expands, and the wearer can be effectively protected.

Further, according to the present invention, the gas layer is formed of a material which does not lose its flexibility even at a low temperature and is not easily melted even at a high temperature.
The wearer can be effectively protected at extremely low or high temperatures.

Further, according to the present invention, since the heat insulating layer is formed of carbon fiber felt, lightweight and effective heat insulation can be performed, and the danger of flammable gas or the like due to generation of static electricity can be avoided.

Further, according to the present invention, since the heat insulating layer is formed of an aromatic polyamide fiber felt, lightweight and effective heat insulation can be performed.

Further, according to the present invention, since the heat insulating layer can cover the trunk of the body, the trunk which is fatal to the body can be effectively protected.

Further, according to the present invention, the generation of static electricity in the protective suit can be prevented, and the danger of ignition when handling flammable gas can be avoided.

Further, according to the present invention, the gas layer provided inside the protective clothing is easily formed by a bag formed by coating an aromatic polyamide fiber cloth with a fluorine resin or a silicone resin. be able to. Since the bag is formed from an aromatic polyamide fiber cloth,
Even at a low temperature of 100 ° C. or lower, the flexibility can be maintained and the gas does not melt at a high temperature of 150 ° C., and the gas can be retained to effectively protect the wearer. In the aromatic polyamide fiber cloth,
Since the coating of the fluorine-based resin or the silicone-based resin is applied, the airtightness can be improved, the gas to be expanded can be effectively stopped, and the expanded state can be continued.

[Brief description of the drawings]

FIG. 1 is a developed view of a back surface side of a heat-insulating protective clothing 10 according to an embodiment of the present invention.

FIG. 2 is a front view of the airbag 15 of FIG.

FIG. 3 is a simplified cross-sectional view showing a fabric configuration of the heat-insulating protective clothing 10 of FIG.

FIGS. 4A and 4B are a front view and a bottom view showing a schematic configuration of a test apparatus 30 for heat insulation performance.

FIG. 5 is a graph showing an example of a test result of heat insulation performance.

FIG. 6 is a diagram showing a divided booth state of the airbag 15 of FIG. 1 by type.

7 is a piping diagram showing a schematic configuration of a test device 40 for a time required to inflate each type of airbag 15 of FIG.

FIG. 8 is a side view and a plan view showing an outline of a liquid nitrogen irradiation test.

FIG. 9 is a graph showing an example of a liquid nitrogen irradiation test result.

FIG. 10 is a front view and a rear view showing a schematic shape of an airbag 50 as another embodiment of the present invention.

11 is a front view showing a configuration for inflating the airbag 50 of FIG.

FIG. 12 shows a still further embodiment of the present invention.
FIG. 11 is a piping diagram showing a configuration for automatically inflating the airbag 15 of FIG. 10 and the airbag 50 of FIG.

FIG. 13 is a simplified cross-sectional view showing a fabric configuration as still another embodiment of the present invention.

FIG. 14 is a simplified front view showing an example of the shape of the felt heat insulating material 60 of FIG.

FIG. 15 is a simplified front view showing another example of the shape of the felt heat insulating material 60 of FIG.

FIG. 16 is a graph showing test results obtained by the test apparatus 30 of FIG. 4 in relation to the felt heat insulating material 60 of FIG.

FIG. 17 is a graph showing the results of the liquid nitrogen irradiation test of FIG. 8 in relation to the felt heat insulating material 60 of FIG. 13;

FIG. 18 is a simplified cross-sectional view showing the fabric configuration of a prior art cold-resistant garment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Insulation protective clothing 11 Protective clothing 12,22 Lining 13 Pocket 14,61 Surface fastener 15,50 Airbag 16,51 Silicone tube 17,52 Valve with check valve 21 Base cloth 23 Air layer 24 Moisture-permeable waterproof film 25 Filling 30 , 40 Test equipment 55 High-pressure cylinder 57 Controller 58 Temperature detector 60 Felt insulation material 62 Carbon fiber felt 63 Aromatic polyamide fiber woven fabric

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A41D 31/00 503 A41D 31/00 503F 503N 31/02 31/02 H

Claims (10)

[Claims] 1. An insulated protective garment comprising: a protective garment having resistance to an external temperature; and a heat insulating layer provided inside the protective garment and holding a gas. 2. The heat-insulating protective clothing according to claim 1, wherein the heat-insulating layer is detachable inside the protective clothing. 3. The heat-insulating layer is a gas layer capable of supplying and expanding a gas, and includes gas supply means for supplying air to the gas layer and expanding the gas layer. Or the insulated protective clothing of 2. 4. A gas detector, comprising: a temperature detector for detecting a temperature of the outside air; and a controller for starting expansion of the gas when the temperature detector detects a predetermined low or high temperature. The heat-insulating protective suit according to claim 3, comprising: 5. The material for forming the gas layer is aromatic polyamide, polyimide, polytetrafluoroethylene, vinyl fluoride polymer, flame-retardant grade polyethylene terephthalate, aromatic polyamide coated with a fluororesin, or 5. The heat-insulating protective suit according to claim 3, wherein one of aromatic polyamides coated with a silicone resin is selected. 6. The heat-insulating protective clothing according to claim 1, wherein the heat-insulating layer is formed of carbon fiber felt. 7. The heat insulating layer according to claim 1, wherein the heat insulating layer is formed of an aromatic polyamide fiber felt.
Insulated protective clothing as described. 8. The heat-insulating protective garment according to claim 1, wherein the heat-insulating layer has a shape that covers the trunk of the body when the protective garment is worn on the body. . 9. The heat-insulating protective clothing according to claim 1, wherein the protective clothing has a batting of carbon fiber felt between a base cloth on a front surface and a lining on a rear surface. 10. A method of forming a gas layer provided inside a protective suit having resistance to an external temperature and expandable by a gas, wherein a cloth of an aromatic polyamide fiber is coated with a fluorine-based resin or a silicone-based resin. And forming a removable gas layer inside the protective clothing using the bag.