JPH11124710A - Low temperature-protective wear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low temperature-protective wear having no problems of freezing of a cloth/fabric even a warm liquid comes to contact with the cloth, capable of selecting specifications depending on working conditions and environments, having no problems of damaging even in contacting with a very low temperature-liquid and excellent in durability. SOLUTION: A water repelling process with a silicone resin 32 is applied to or a synthetic rubber layer is installed to the face side background 31 of an outer fabric 14 and a removable inner fabric 15 is fitted to the outer fabric 14 by a slide fastener. The inner fabric 15 includes an outer lining fabric 34, a middle fabric 36 and an inner lining fabric 37. When a very low temperature-liquid is brought to contact with the said process-applied face side background 31, the liquid rolls down in a spherical shape. Even when the very low temperature liquid is brought to contact with the face side background 31 applied with a rubber layer, the liquid does not penetrate into the face side background. The fabric is never frozen even under a moist environment. By preparing the inner fabrics having different thickness of the middle fabric 36, you can choose them depending on using conditions. As the outer fabric 14 and the inner fabric 15 are removable in wearing, it is easy to repair and wash either one of them when it is broken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature protective garment sometimes referred to as a cold-resistant garment.

[0002]

2. Description of the Related Art Low-temperature protective clothing is worn by workers in storage tanks and tank trucks handling cryogenic liquids such as liquefied natural gas and liquefied propane gas. It has low-temperature insulation performance so that workers do not suffer from frostbite even in a very low-temperature environment, has excellent heat retention, requires extremely low-temperature liquid permeation resistance, and quickly removes water vapor caused by sweat generated from the human body. It is required to have the ability to diffuse out of clothes.

[0003] A typical prior art of such a low temperature protective suit is disclosed in Japanese Utility Model Laid-Open Publication No. 59-37315, which is disclosed in FIG.
Is shown in The base fabric, which is the fabric forming the garment, is made of a woven aromatic polyamide fiber 1 from the front side to the back side.
And a porous film 2 of a fluorine resin, a felt 3 of an aromatic polyamide fiber, and a porous film 2a of a fluorine resin.
And a woven fabric 1a of aromatic polyamide fibers. Each of these layers is partially bonded at the heat-sealed portion 4. Sewing of the fabric composed in this way,
All layers are integrally provided, and the seam is made of a fluororesin tape 5.
To maintain liquid tightness at the sewn area. The fluororesin porous films 2 and 2a serve to prevent penetration of the cryogenic liquid and to prevent stuffiness in clothes.

[0004] In the above-mentioned prior art, in a humid environment, the dough may freeze when exposed to a low-temperature substance such as liquefied natural gas and liquefied propane gas. In addition, since all layers of the fabric are sewn integrally, it is not possible to select specifications according to working conditions and the environment. If 1 is soiled, there is also a problem that repair and washing are difficult. Further, in this prior art, since all the layers are partially adhered at the heat-sealed portion 4, the physical properties at the heat-sealed portion 4 are deteriorated. The part 4 may be peeled off.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the possibility of freezing a cloth as a dough even when it comes into contact with a cryogenic liquid, and to select specifications according to working conditions and environments. An object of the present invention is to provide a durable low-temperature protective suit that is not damaged even when contacted with a cryogenic liquid.

[0006]

SUMMARY OF THE INVENTION The present invention provides an outer garment formed by applying a water-repellent treatment to a surface material and a detachable inner garment. A low-temperature protective suit comprising: an inner garment portion including an inner lining.

According to the present invention, in the low-temperature protective garment including the outer garment portion and the inner garment portion, the inner surface or outer surface of the outer garment of the outer garment portion or the inside of the outer garment is subjected to a water repellent treatment with a synthetic resin water repellent such as silicone resin. Thereby, even if the cryogenic liquid comes into contact, freezing of low-temperature physical properties can be prevented.

According to the present invention, the low-temperature protective clothing is attached to and detached from the outer garment by means of a slide fastener, a planar fastener or a plurality of point fasteners called an open fastener, for example. And a possible inner garment.

An inner garment having various specifications such as a different thickness of batting of the inner garment is prepared, and working conditions, environment,
For example, low-temperature protective clothing having a specification corresponding to the temperature can be selected and worn. That is, by selecting an inner garment part of various specifications according to the use situation and replacing the various inner garment parts, it is possible to wear low-temperature protective clothing used according to the working environment temperature.

According to the present invention, since the outer garment and the inner garment are detachable, for example, when the outer garment is soiled,
Only the outer garment can be repaired and washed. This is also true for the inner garment. Therefore, repair and washing are easy.

Further, according to the present invention, since the outer garment portion and the inner garment portion are detachable, the outer garment portion and the inner garment portion may be separately prepared, attached, and integrated. Therefore, it is not necessary to subject these two members to heat fusion processing, for example, in a dotted manner. Therefore, the physical property does not decrease due to the heat fusion processing, that is, the physical property of the heat fusion part does not decrease when the cryogenic liquid starts to fall. Therefore, when the cryogenic liquid starts to fall, the heat-sealed portion does not peel off or break. Thereby, the cryogenic liquid permeation prevention function is reliably achieved.

By subjecting the outer material to a water-repellent treatment, the surface of the fiber constituting the outer material is coated with a water-repellent agent, for example, a silicone resin. This allows liquids such as cryogenic liquids to be rolled in a bead shape and to be rolled down, and the fine permeation holes in the outer material not to be blocked, allowing the gas and liquid to pass through and maintaining the state of perspiration during sweating The stuffiness can be prevented.

According to the present invention, there is provided an outer garment portion formed by applying a synthetic resin layer to the outer material so as to prevent gas and liquid from permeating the outer garment portion, and detachable inside the outer garment portion. A low-temperature protective suit comprising an inner garment part including a lining.

According to the present invention, a flexible synthetic resin layer containing a synthetic rubber such as silicone rubber is coated on the inner surface or the outer surface of the outer material of the outer garment portion or in the outer material.
According to this configuration, the outer garment portion can be made of a completely waterproof fabric. Therefore, not only the cryogenic liquid but also the cryogenic gas can be prevented from entering the inside of the clothes. Further, together with the above-described claim 1, the inner garment portion can be shared, and the outer garment portion can be selectively used as the outer garment portion subjected to the water-repellent treatment and the outer garment portion provided with the synthetic resin layer. Thus, it becomes possible to select low-temperature protective clothing having various specifications.

Further, the present invention is characterized in that the inner garment portion has a polymer film layer between the outer lining and the inner lining that is permeable to water vapor and impermeable to liquid.

According to the present invention, the polymer film layer permeates the water vapor of the sweat generated from the human body to achieve a stuffiness prevention function, and at the same time, does not transmit the cryogenic liquid such as liquefied natural gas and liquefied propane gas. Has a low-temperature liquid penetration prevention function.

Since the polymer film layer is arranged as described above, even in a place where the cryogenic liquid may fall directly on the worker, the cryogenic protective suit can be used even when the cryogenic liquid is worn. Even if the cryogenic liquid permeates the outer garment, the inner garment can ensure the protection of the cryogenic liquid from penetrating. The polymer film layer serves to prevent liquids such as water from penetrating, for example, under water discharge conditions or when working in rainy weather. The polymer film layer may consist of a single or multiple polymer films.

Further, the present invention is characterized in that the polymer film layer has such a property that the lower the temperature, the lower the moisture permeability.

According to the present invention, the polymer film layer can control moisture permeability corresponding to the environmental temperature, and has a so-called temperature-responsive memory function. Therefore, the cryogenic liquid can be prevented from directly entering the human body side by the polymer film layer, and the lower the temperature, the lower the moisture permeability, so that the low-temperature gas gasified near the surface of the polymer film layer is , Does not transmit through the polymer film layer. Therefore, for example, a low-temperature gas of about −50 ° C. or less is prevented from entering the human body through the polymer film layer, and the low-temperature gas does not cause frostbite on the human body, and the moisture retention property is improved. Under normal conditions where the cryogenic liquid or gas does not contact the polymer film layer, the polymer film layer automatically changes to a super water resistant state and a high moisture permeable state. Therefore, the water vapor due to perspiration is smoothly radiated to the outside, and the heat radiation effect can be achieved without stuffiness.

In this way, moisture permeation control can be performed in conjunction with the temperature of the polymer film layer, whereby a heat retaining function can be achieved at low temperatures, and a heat radiation effect can be exerted at high temperatures such as when the human body is sweating.

Further, the present invention has an outer garment portion and an inner garment portion detachably provided inside the outer garment portion.
It is composed by applying water repellent treatment with a water repellent to the outer material, and the inner garment portion, in order from the outside to the inside, transmits the outer lining and water vapor,
A low-temperature protective suit comprising a polymer film layer that is impermeable to liquid and has a lower moisture permeability as the temperature is lower, a batting, and an inner lining.

Further, the present invention has an outer garment portion and an inner garment portion detachably provided inside the outer garment portion.
Outer material, including a synthetic resin layer formed on the outer material and impermeable to gas and liquid, the inner garment portion, in order from the outside to the inside,
A low-temperature protective suit comprising an outer lining, a polymer film layer that is permeable to water vapor, does not transmit liquid, and has a lower moisture permeability as the temperature is lower, a batting, and an inner lining.

According to the present invention, a silicone resin layer is formed on the inner surface of the outer material of the outer garment and water-repellent is applied, or a synthetic resin layer is formed on the outer material, and the outer garment and the inner garment are combined with each other. As described above, the attachment and detachment means such as fasteners or point fasteners make it possible to prevent the dough from freezing due to the cryogenic liquid in a moist environment. It is possible to select, and it is easy to repair and wash when only the outer or inner garment is soiled, and it is also possible to prevent breakage and the like at the time of contact with cryogenic liquid, and to achieve the above-mentioned respective functions. You.

[0024]

FIG. 1 is a sectional view of a part of a low-temperature protective garment 11 according to an embodiment of the present invention. The low-temperature protective clothing 11 can also be referred to as a cold-resistant clothing, and is worn by an operator in a workplace that handles cryogenic liquids such as liquefied natural gas and liquefied propane gas.

FIG. 2 is a perspective view showing the entire structure of the low-temperature protective clothing 11. The low-temperature protective clothing 11 is of a so-called separate type or two-piece type,
2 and a lower garment 13 as pants.

FIG. 3 is a development view of the upper garment 12 as viewed from the inside. The upper garment 12 includes an outer garment portion 14 and an inner garment portion 15 provided detachably inside the outer garment portion 14. The outer garment portion 14 and the inner garment portion 15 are detachable by slide fasteners 16 and 17 inside the outer garment portion 14. These slide fasteners 16, 17 are provided to extend vertically near the front end of the outer garment 14.

FIG. 4 is a perspective view showing a part of the lower garment 13. The lower garment 13 includes an outer garment portion 19 and an inner garment portion 20 provided inside the outer garment portion 19 so as to be detachable by a slide fastener 21. The slide fastener 21 is provided in an annular shape near the upper end line of the body. Outer garment parts 14, 19
Have the same sectional structure. The cross-sectional structures of the inner garments 15 and 20 are the same.

Referring again to FIG. 1, the outer garment portion 14 has a surface material 31 subjected to a water-repellent treatment. The silicone resin which is a water repellent for the water repellent process is indicated by reference numeral 32. The silicone resin 32, which is a water repellent, is applied to, for example, the inner surface (the lower surface in FIG. 1) of the outer material 31, whereby the surface of the fiber of the outer material 31 can be covered as described above. In FIG. 1, for convenience, the silicone resin 32 is used.
Are shown in layers. This water-repellent treatment may be achieved by applying a silicone resin to the outer surface (the upper surface in FIG. 1) of the outer material 31 or may be permeated into the outer material 31.

The outer material 31 is made of a woven fabric of aromatic polyamide fibers, and is formed by applying a water repellent treatment by coating the surface of the fibers with a silicone resin. The thickness of the coating layer of the silicon resin for the water-repellent processing is, for example, 5 μm. Due to the water-repellent treatment of the silicone resin, the liquid rolls down in a ball shape, and the outer material 31 and the high moisture absorbing sheet 3
It is possible to prevent freezing to a low-temperature object such as 3, and to maintain a state of passing gas and liquid.

The aromatic polyamide fiber does not cure even when it comes into contact with liquid helium at about -269 ° C., and retains its flexibility, so that it can be exposed directly to a cryogenic liquid.
The motor function of the low-temperature protective suit is not impaired. Moreover, even if a combustible gas such as liquefied natural gas and liquefied propane gas is ignited and the low-temperature protective suit of the present invention is exposed to the flame, it does not burn and has fire resistance and flame resistance. The outer material 31 may have a thickness of, for example, 0.3 mm and a density of about 180 g / cm ² . Instead of the aromatic polyamide fiber, an aromatic polyimide fiber or the like may be used. The outer material 31 may be a woven fabric, but may be a knitted fabric or a nonwoven fabric. The outer material 31 has a function of improving the strength of the low-temperature protective clothing 11 of the present case, and also has a function of preventing liquid such as a cryogenic liquid from entering by being subjected to the water-repellent treatment as described above. The woven fabric of aromatic polyamide fiber is, for example, Teijin Xfire C
It is commercially available as X2722OR (trade name).

The inner garment portion 15 of the upper garment 12 includes an outer lining 34, a polymer film layer 35, a batting 36, and an inner lining 37 in order from the outside to the inside (from top to bottom in FIG. 1). The batting 36 and the inner lining 37 are integrated by a quilting process of sewing with a thread. The outer lining 34, the polymer film layer 35, the batting 36 and the inner lining 37 are integrally sewn to form the inner garment portion 15.

The outer lining 34 and the inner lining 37 are woven fabrics of aromatic polyamide fibers, and are commercially available, for example, as Teijin Conex C01511NB (trade name).

The polymer film layer 35 is a material having both functions of transmitting water vapor and not transmitting liquid. The polymer film layer 35 is, for example, a polyurethane composition. The polyurethane composition is obtained by reacting an isocyanate, a polyol, and a chain extender, and has a glass transition point in a range of about -10 ° C to about 20 ° C, and contains at least 7. 0 mol /
Contains more than kg of ethylene oxide. Isocyanates include 4,4'-diphenylmethane diisocyanate (MDI) and water-added MDI. The polyol is composed of a mixture of polyethylene glycol and polytetramethylene glycol and has a molecular weight of 500 to
It is in the range of 3000. The polyol is composed of a mixture of polyethylene glycol, ethylene oxide and an ester of adipic acid, and has a molecular weight of 500 to 300.
It is in the range of 0. The chain extender is, for example, ethylene glycol.

By setting the glass transition point within the above range, the ratio of the water vapor transmission rate between 40 ° C. and 10 ° C. becomes 2 or more,
The lower the temperature, the lower the moisture permeability. The polymer film layer 35 made of this polyurethane composition has
A thin nonporous membrane is laminated, and the polymer molecules that make up the membrane have the property of causing micro-Brownian motion, that is, thermal vibration, depending on the temperature. When the temperature in the clothes rises due to the movement, the micro-Brownian movement is activated, and as shown in FIG. 5, the gap between the polymer molecules 23, that is, the free volume increases, and the water molecules 25 are changed as indicated by the arrow 26. Micropores are created that can pass through. As a result, the amount of water vapor permeated during perspiration is increased, and the function of preventing stuffiness in clothes is achieved. In FIG. 5, reference numeral 23 denotes a polymer molecule, reference numeral 24 denotes a molecular chain, and reference numeral 25 denotes a water vapor molecule. The water vapor molecules 25 move from the human body side (the lower part of FIG. 5) to the outside (the upper part of FIG. 5), that is, to the outer material 31 side as indicated by an arrow 26. This polyurethane composition is commercially available, for example, as Diamate (trade name, manufactured by Mitsubishi Heavy Industries, Ltd.).

In another embodiment of the present invention, a porous film of a fluorine resin, for example, polytetrafluoroethylene, can be used in place of the above polyurethane composition. This film has a large number of micropores having a pore diameter of, for example, 0.2 to 10 μm, which allow water vapor having a diameter of, for example, 0.0004 μm to pass therethrough and do not transmit raindrops having a diameter of 100 μm or more.
Such films are commercially available, for example, under trade names such as Gore-Tex and Micro-Tex.

The above-mentioned polyurethane composition differs from such a fluororesin porous film in that it does not have a porous structure and is a nonporous material. Since it has a temperature response memory function utilizing micro-Brownian motion, it is possible to control moisture permeability linked to temperature, achieve a heat retention function at low temperatures, and exhibit a heat radiation effect at high temperatures such as normal temperature. The thickness of the polymer film layer 35 is, for example, 10 μm.

The batting 36 has a structure in which a plurality of, for example, two nonwoven fabrics are stacked. This nonwoven fabric is made of aromatic polyamide fibers, and the thickness of one sheet is, for example, about 2 mm. This non-woven fabric is manufactured by Teijin Conex C09
It is commercially available as 015WS (trade name).
The batting 36 may also be a nonwoven fabric made of aramid fiber, which is a flame-retardant material. The batting 36 forms a heat insulating layer. Various thicknesses of the batting 36 are used for the inner garment 1
By replacing 5, it is possible to select and wear low-temperature protective clothing having specifications according to the working environment temperature.
Other cloths may be used in place of the woven cloth.

The outer garment portion 19 of the lower garment 13 corresponds to the outer garment portion 1 described above.
4 and the inner garment 20 is the same as the inner garment 1 described above.
5 is configured in the same manner.

FIG. 6 is a sectional view of a part of the inner garment portion 15. The outer lining 34 is sewn together with a sewing thread 56 in a state where the polymer film layer 35 is superimposed on the outer lining 34, and furthermore, the outer lining 34 and the polymer film layer 35, which are folded in directions extending in mutually opposite directions, form a sewing thread. Stitched by 57. Further, the tape 58 is used for the sewing thread 5
It is stuck on 6,57 stitches. This tape 58
Is a urethane-based resin and has a thickness of about 100 μm. The tape 58 is fixed on the stitches of the sewing threads 56 and 57 by heat fusion. This ensures airtightness to the cryogenic liquid at the perforations, and maintains the liquid permeation resistance of the seam of the inner garment 15.

Regarding the outer garment section 14, the seams of the outer garment 31 are air-tightly fixed in the same manner as the outer lining 34 of FIG.

FIG. 7 is a sectional view showing the vicinity of the cuff 59 of the upper garment 12. At the cuff 59 of the inner garment portion 15, the outer lining 34 is folded at the end 60 of the cuff 59 to form another lining 61, and a cylindrical gap 62 facing the end 60 between the inner lining 37 and the inner lining 37. Form. The cylindrical mouth 64 of the glove 63 is inserted into the gap 62. At the cuff 59, the inner peripheral surface of the outer garment portion 14 and the outer peripheral surface of the outer lining 34 of the inner garment portion 15 are configured to be detachable by an annular surface fastener 65 that is continuous in the circumferential direction. Therefore, in the vicinity of the end 60 of the cuff 59,
Can be detachably tightened and fixed. Thus, even during intense exercise, the outer garment portion 14 and the inner garment portion 15 do not shift, and the glove 63 and the upper garment 12
The gap with the cuff 59 is made airtight.

The rubber cuff of the sock or the cylindrical upper end of the shoe is sandwiched between the base of the lower garment 13 as the pants, and the cuff 5 shown in FIG.
In the same manner as the configuration in which the glove 63 is sandwiched between 9, it can be detachably attached.

FIG. 8 is a simplified perspective view of still another embodiment of the present invention. The present invention is not only practiced in connection with the two-piece cold protection garment 11 described above, but also with respect to a one-piece, tethered or smoke-tube garment-type cold protection garment 66 as shown in FIG.
Can be implemented. Further, the present invention can be practiced with respect to a coat-type low-temperature protective suit.

FIG. 9 is a front view of the slide fastener 16. One core string 68 is sewn and fixed to the inner surface of the outer garment portion 14. The other core cord 69 is sewn and fixed to the outer surface of the inner garment portion 15. The element 70 fixed to the core strings 68 and 69 is connected and disconnected by the movement of the slider 71. An upper stop 72 is provided at one end in the arrangement direction of the elements 70, and a lower stop 73 is provided at the other end so as to be detachable from each other. Another slide fastener 17 is also configured similarly to the slide fastener 16.

The experimental results of the present inventor will be described. Example 1
4, the thickness of the silicone resin 32 of the outer garment portion 14 differs as shown in Table 1, and the number of battings 36 of the inner garment portion 15 differs as shown in Table 1.

[0046]

[Table 1]

The first embodiment has the structure shown in FIGS. 1 to 7, and the outer garment portion 14 of the upper garment 12 is made of Teijin Xfire C.
A 5 μm thick silicon resin 32 was coated on the inner surface of a dress material 31 made of woven aromatic polyamide fiber X2722OR (trade name), and subjected to a water-repellent treatment. The inner garment portion 15 includes an outer lining 34 made of woven aromatic polyamide fiber as Teijin Conex C01511NB (trade name), a 10 μm thick polymer film layer 35 as Diamate (trade name), and a Teijin Conex C0901.
A batting 36 in which two felts or non-woven fabrics of aromatic polyamide fiber having a thickness of 2 mm and 5WS (trade name) are stacked;
And an inner lining 37 made of woven aromatic polyamide fiber which is Teijin Conex C01511NB (trade name). The batting 36 and the inner lining 37 were integrated by quilting, and these layers 34 to 37 were integrally sewn. In the configuration shown in FIG. 6, the tape 58 is made of urethane resin, has a thickness of 100 μm, and is bonded by heat fusion. The lower garment 13 also has the same configuration as the upper garment 12.

As shown in Table 1, in Example 2, the thickness of the silicon resin 32 is 200 μm, is configured to be impermeable to gas and liquid, and is completely waterproof.
The number of the battings 36 of the inner garment 15 is three, so that the batting 36 can be used in a situation where there is a high risk of leakage of the cryogenic liquid.

In the third embodiment, one batting 36 is used, and the other configuration is the same as that of the first embodiment.

In the fourth embodiment, the polymer film layer 35
Teijin XFire CX2942NB (trade name) was a woven aromatic polyamide fiber. The batting 36 in the inner garment 15 in the fourth embodiment is not used. The inner garment 15 in the fourth embodiment does not include the batting 36. In the fourth embodiment, the inner garment 15 is used for comparison, but will be referred to as an example for convenience.

Table 2 shows the test results of flame protection and low-temperature heat insulation in Examples 1 to 4 described above. The tests in Table 2 were performed under the atmosphere open at a temperature of 20 ° C. and a humidity of 40%.

[0052]

[Table 2]

The flame protection test was carried out according to the international industrial standard ISO.
The test results are based on DIS-5190.
When the heat of kW / cm ² was continuously supplied, the time required for the temperature on the back side of the sample to rise from room temperature 20 ° C. to 24 ° C. was measured. According to the results of the flame protection test of Examples 1 to 3, the temperature rise time is 20 seconds or more, and for example, a performance that can sufficiently satisfy 15 seconds, which is the time specified by the Tokyo Fire Department Fire and Fire Research Institute. It was confirmed that it had. According to the flame protection test result of Example 4, the temperature rise time is 1
The time was 0 second, and it was confirmed that, even in the case of the fire, this example 4 had the ability to make an emergency evacuation from that place. Therefore, the present protective suit can be used even in a high-temperature atmosphere and has high-temperature resistance.

The low-temperature insulation test at “−50 ° C.” in Table 2 is a result of measuring the heat insulation when the sample was brought into contact with a low-temperature object at −50 ° C. The time at which the temperature of the inner surface of the clothes dropped to -5 ° C was measured.
Regarding thermal insulation at low temperatures, human body tissues have an outside air temperature of -1.
Start to freeze at 0 ° C. In Examples 1 to 4, the temperature did not decrease to −5 ° C. even after elapse of 30 minutes, and it was confirmed that the composition had sufficient low-temperature heat insulating properties.

The low-temperature insulation test at “−150 ° C.” in Table 2 shows the time when the inner surface of the low-temperature protective suit of the present invention falls to −5 ° C. when the sample is brought into contact with a 150 ° C. low-temperature object.
"Exposure to liquid nitrogen" means that the sample was subjected to -196 ° C and a pressure of 2 kg.
5 shows the same low-temperature adiabatic test results when exposed to liquid nitrogen at / cm ² .

According to the results of these low-temperature insulation tests,
When the cryogenic liquid leaked suddenly, it was confirmed that it had sufficient performance to enable emergency evacuation from that location. Actually, since heat is supplied to the skin tissue of the human body by blood flow or the like, the time required for the skin surface temperature to decrease to 5 ° C. in the low-temperature adiabatic test by exposure to liquid nitrogen is about 1% in Example 1. 4 minutes, and about 7 minutes in Example 2. From this, it was confirmed that Examples 1 to 4 can be carried out also for emergency repair of a leaked part and rescue of life when the amount of leakage of the cryogenic liquid is not large.

In such a low-temperature protective suit having the structure of the first to fourth embodiments, by always keeping the low-temperature protective suit having the structure of the second embodiment, emergency repair of a leaked part and rescue of human life are possible. . The outer garment portion 14 is prepared in two types, that is, the configuration shown in the first, third, and fourth embodiments and the configuration shown in the second embodiment.
As shown in Nos. 1 to 3, the inner garment 1 having a different number of battings 36, and further having a configuration in which the number of battings 36 is 4 or more
By preparing a plurality of types 5, it is possible to select and wear low-temperature protective clothing of various types according to the outside air temperature or the use environment and conditions. For example, the outer garment portion 14 of the first embodiment and the inner garment portion 15 of any one of the first to third embodiments.
In combination with the above, a low-temperature protective suit can be realized. Also, a combination of the outer garment portion 14 of the second embodiment and the inner garment portion 15 of any one of the first to third embodiments can realize a low-temperature protective suit.

[0058]

According to the first aspect of the present invention, a worker who performs daily inspection and carry-in work of a storage tank that handles cryogenic liquid such as liquefied natural gas and liquefied propane gas, and a worker who carries a tank truck. By wearing the low-temperature protective suit of the present invention, when a cryogenic liquid leaks due to a sudden accident and a fire occurs, safe emergency evacuation from the work site becomes possible, resulting in death or serious injury. Can be prevented beforehand.

Since the outer garment is formed by applying a water repellent treatment to the outer material with a water repellent such as a silicone resin, it is possible to prevent freezing to a low-temperature object, and there is a possibility that the dough may freeze in a humid environment. Therefore, the strength is maintained, and the person wearing the low-temperature protective suit can exercise smoothly.

Further, according to the present invention, since the outer garment portion and the inner garment portion are made detachable, for example, by preparing inner garment portions having various batting thicknesses and selectively attaching them to the outer garment portion, the temperature of the working environment can be improved. A low-temperature protective garment having specifications according to the requirements can be selected. By replacing the inner garment with different specifications such as batting thickness,
It is possible to wear low-temperature protective clothing having specifications corresponding to the working environment temperature.

Further, since the outer garment portion and the inner garment portion are detachable, when one or both of them are soiled, there is an effect that maintenance and inspection such as selection and repair are easy. The outer garment is more likely to be damaged than the inner garment, and if the outer garment is damaged, the outer garment can be removed from the inner garment and easily repaired, washed, and replaced.

Further, by making the outer garment portion and the inner garment portion detachable, it is not necessary to bond these two members by heat fusion. This does not cause a decrease in physical properties due to the heat fusion, and therefore there is no possibility of breakage such as peeling at the heat fusion portion when the cryogenic liquid falls on the low temperature protective suit and comes into contact with the low temperature protective suit. Low-temperature liquid permeability can be reliably achieved, and safety is ensured.

According to the second aspect of the present invention, since a synthetic resin layer such as a synthetic rubber is applied to the outer material of the outer garment portion, a long-time operation in an environment where a cryogenic liquid is in direct contact with the outer garment portion,
A completely waterproof fabric can prevent the cryogenic liquid and cryogenic gas from entering the interior of the garment.
The use of the outer garment having a surface material provided with a synthetic resin layer enables an emergency repair work of a storage tank and a tank truck in an extremely low temperature environment. Further, the inner garment portion is shared with the configuration of the above-described claim 1, and the outer garment portion having the water-repellent treated outer material portion and the outer garment portion having the synthetic rubber layer applied outer material portion are selectively used. Accordingly, it is possible to select a low-temperature protective suit having specifications according to the working environment such as working conditions and temperature.

According to the third aspect of the present invention, the worker feels discomfort due to stuffiness by wearing the low-temperature protective suit of the present invention at a work site where there is a possibility of being directly exposed to the cryogenic liquid. Without the need for comfortable work.

According to the fourth aspect of the present invention, the polymer film layer is a material that reacts in accordance with the environmental temperature, and therefore prevents the low-temperature gas gasified on the surface of the polymer film layer from entering the human body, For example, a polymer film layer prevents a low-temperature gas of about -50 ° C. or less from entering the human body and prevents frostbite, and in a normal state where such a low-temperature gas does not exist near the surface of the polymer film layer, The permeation of water vapor caused by perspiration of the human body is ensured, and the stuffiness prevention function is achieved.

According to a fifth aspect of the present invention, a water-repellent outer garment is used for the outer material, and an outer garment having the outer material with the synthetic resin layer formed thereon is used. By configuring the low-temperature protective clothing by detachably attaching the parts, the effects of the above-described respective inventions can be similarly achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a part of a low-temperature protective garment 11 according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the entire configuration of the low-temperature protective clothing 11.

FIG. 3 is a development view as viewed from the inside of the upper garment 12;

FIG. 4 is a perspective view showing a part of a lower garment 13;

FIG. 5 is a view for explaining a state in which water vapor molecules 25 pass through the nonporous polyurethane composition which is the polymer film layer 35.

FIG. 6 is a sectional view of a part of the inner garment portion 15;

FIG. 7 is a sectional view of the vicinity of a cuff 59 of the upper garment 12;

FIG. 8 is a simplified perspective view of still another embodiment of the present invention.

FIG. 9 is a front view of the slide fastener 16. FIG.

FIG. 10 is a sectional view of a part of the prior art.

[Explanation of symbols]

 11,66 low-temperature protective clothing 12 upper garment 13 lower garment 14,19 outer garment 15,20 inner garment 16,17 slide fastener 31 outer material 32 silicone resin 34 outer lining 35 polymer film layer 36 batting 37 inner lining 56,57 sewing machine thread 58 tape 59 Cuffs 60 Ends 61 Lining 62 Gaps 63 Gloves

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koichi Sumida, Inventor 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Ken Ogasawara 1-5-2, Kaigan, Minato-ku, Tokyo No. Tokyo Gas Co., Ltd. (72) Inventor Hiroshi Minami 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Masaru Yuki 19-18 Sakuradacho, Atsuta-ku, Nagoya City, Aichi Prefecture Toho Gas Co., Ltd. (72) Kazuo Kato 19-18 Sakuradacho, Atsuta-ku, Nagoya City, Aichi Prefecture No. Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Shunichi Hayashi 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Nagoya Research Laboratory, Mitsubishi Heavy Industries, Ltd. Man Takahama Engineering Co., Ltd. 2-1-1 Shinhama, Arai-cho, Takasago-shi, Hyogo

Claims (6)

[Claims] 1. An outer garment portion formed by applying water repellent treatment to a surface material with a water repellent, and an inner garment portion detachable inside the outer garment portion and including an outer lining, a batting, and an inner lining. A low-temperature protective suit comprising: 2. An outer garment, which is formed by applying a synthetic resin layer to the outer material so as to prevent gas and liquid from permeating, and an outer lining, a batting and an inner lining, which are detachable inside the outer garment. A low-temperature protective suit comprising: 3. The low-temperature protective clothing according to claim 1, wherein the inner garment portion has a polymer film layer between the outer lining and the inner lining that is permeable to water vapor and impermeable to liquid. 4. The low-temperature protective suit according to claim 3, wherein the polymer film layer has a characteristic that the lower the temperature, the lower the moisture permeability. 5. An outer garment portion and an inner garment portion detachably provided inside the outer garment portion, wherein the outer garment portion is formed by applying water repellent treatment to a surface material with a water repellent. , From the outside to the inside, the outer lining, the water vapor, not the liquid, and the lower the temperature,
A low-temperature protective suit comprising a polymer film layer having a reduced moisture permeability, a batting, and an inner lining. 6. An outer garment portion, and an inner garment portion detachably provided inside the outer garment portion, wherein the outer garment portion includes a surface material, a synthetic resin layer formed on the surface material, and impermeable to gas and liquid. The inner garment, in order from the outside to the inside, has an outer lining, a water vapor-permeable, liquid-impermeable, and a lower temperature,
A low-temperature protective suit comprising a polymer film layer having a reduced moisture permeability, a batting, and an inner lining.