JP2002011035A - Antistatic body warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antistatic body warmer with simple structure and low cost which can prevent a wearer from electric shock reminded of wearing it. SOLUTION: The antistatic body warmer 1 comprises a sheet body 2 constituted by at least one or more of synthetic resin film, paper, non-woven fabric and woven fabric, and an antistatic member 4 which, arranged on the sheet body 2 applied with a conductive material 3, passes and discharges electrostatic charge when it comes near touches a grounding body; a bag material 5 with the sheet body 2 partially used, and an exothermic agent 6 contained in the bag material 5. Apart from a normal function as the body warmer, it protects a human body from electric shock due to static discharge, by releasing static charged on the body to the grounding body at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warmer containing a heating agent, which reduces static electricity charged on a human body or the like by contacting it with a grounding body (earth) to reduce a charged voltage, thereby reducing static electricity. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warmer for preventing static electricity, which has a function of preventing a human body from receiving an electric shock.

[0002]

2. Description of the Related Art Generally, in winter or other dry seasons, static electricity is generated due to friction or the like, and when a door knob of a house or a door knob of a car is touched with bare hands, an electric shock is generated by the discharge of the charged static electricity. is there. The cause is that there is a potential difference between the human body and the doorknob trying to touch, and due to the electrical discharge phenomenon that occurs when touching or approaching, a current flows between the two in a short time and the potential difference between the two is neutralized Is to do.

On the other hand, disposable warmers are frequently used especially in the winter season, and the season also coincides with the time when an electrostatic failure occurs. A conventional warmer is provided in which a heating agent that starts an oxidation reaction by contact with air such as iron oxide and generates heat is contained in a bag material such as a nonwoven fabric.

[0004] By the way, various conventional techniques for preventing such a failure due to static electricity have been provided.

First, as a first prior art, there is an antistatic key ring.

Next, as a second prior art, Japanese Utility Model Laid-Open No.
There is one described in JP-A-7-21651. The invention described in this publication relates to felts, nonwoven fabrics, knitted fabrics, and woven fabrics in which conductive fibers such as metals, metal-containing, metal-plated, carbon, and various carbon-containing fibers are mixed in a very small amount. An antistatic adhesive cloth formed by applying an adhesive film or a heat-meltable substance to one side of the above-mentioned cotton body so as to give an adhesive film is used.

The third prior art is disclosed in Japanese Utility Model Application
There is one described in JP-A-2-148511. The invention described in this publication includes an electrostatic damage prevention glove in which a fingertip portion of 5 to 50 [mm] is made of a woven or knitted fabric made of at least one of carbon fibers and organic semiconductor processed fibers.

A fourth prior art is disclosed in Japanese Patent Application Laid-Open No. Hei 10-46001. The invention described in this publication is to graft copolymerize one or more ethylenically unsaturated monomers to a rubber trunk polymer containing a monomer having an alkylene oxide group and an ethylenically unsaturated bond as a constituent. Composed of a synthetic resin composition comprising a graft copolymer obtained by
^A molded article made of a synthetic resin having a volume specific resistivity in the range of ^{5 to 1 × 1013} [Ω · cm] and having a static electricity removing property is exemplified.

[0009]

The above-mentioned key ring according to the first prior art has a disadvantage that the structure is complicated and the cost is high because a high-resistance element must be built in the key ring. .

Further, according to the antistatic adhesive cloth according to the second prior art, the electric charge is released into the air only by bonding, and the accumulated static electricity is reduced, but the electrostatic damage is completely prevented. Had the disadvantage of being inadequate.

Further, according to the third prior art glove for preventing static electricity damage, since conductive fibers such as carbon fibers are used, it is difficult to process and the fibers themselves have no strength. There were problems such as easy tearing.

[0012] In addition, according to the fourth prior art synthetic resin molded article having static elimination properties, the resin is expensive, and because it is a molded article, it can be used when attached to clothing or the like or carried. Had problems such as a sense of discomfort. Further, the conventional warmer is often used at a time when an electrostatic failure is likely to occur, but there is no one that incorporates an electrostatic failure prevention function. Therefore, the present inventors
To solve the problem of the conventional products with the function of preventing static electricity, at the same time, the cairo is not so large that it does not feel uncomfortable even when worn, and it also has a function to make the user recognize the presence because it generates heat. The present invention focused on the above has been completed.

That is, the present invention solves the above-mentioned drawbacks of the prior art, does not forget that it is worn, has a simple structure, is low in cost, and can prevent the electric shock caused by static electricity. The purpose is to provide a warmer for preventing electrostatic damage.

[0014]

In order to achieve the above-mentioned object, according to the present invention, there is provided a body for preventing static electricity damage, comprising a sheet made of at least one of synthetic resin film, paper, nonwoven fabric and woven fabric. And an anti-static member for applying and discharging a charged charge when the sheet body is provided with a conductive substance applied thereto and approaching or in contact with a grounded body, and a bag material using at least a part of the sheet body And a heating agent contained in the bag material.

According to the first aspect of the present invention, in addition to the function as a normal body warmer, the static electricity charged on the human body can be released to the grounding body to protect the human body from the electric shock caused by the electrostatic discharge.

According to a second aspect of the present invention, in the first aspect, the static electricity prevention member is provided on the surface of the sheet member.
It is provided by a conductive ink containing a conductive substance.

According to the third aspect of the present invention, the first or second aspect is provided.
In the above, the antistatic material is formed by applying a conductive ink to the surface of the sheet by printing.

According to a fourth aspect of the present invention, in the first, second or third aspect, the antistatic material is provided in a range of 45 to 100% of the surface of the sheet. Things.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings, but the present invention is not limited to the embodiments.

FIG. 1 is a cross-sectional view showing a warmer for preventing electrostatic damage according to an embodiment of the present invention. In this FIG.
Electrostatic hazard prevention warmer 1 according to an embodiment of the present invention
Is a sheet 2 made of at least one kind of synthetic resin film, paper, non-woven fabric, and woven fabric, and a conductive substance 3 applied to the sheet 2, and is charged when approaching or coming into contact with a grounded body. A static electricity prevention member 4 for supplying and discharging electricity, a flat bag-shaped bag material 5 using at least a part of the sheet member 2, and a heating agent 6 contained in the bag material 5. It is.

On one surface of the bag material 5, air permeability was adjusted by printing a conductive ink 7 containing a conductive material 3 such as carbon black, titanium or stainless steel on a nylon nonwoven fabric using a gravure printing machine. A non-woven fabric 8 is used as an outermost layer, and a film 9 having micropores formed on a low density polyethylene (LDPE) is laminated on the inner side, and a linear low density polyethylene (L / LDPE) having a good heat-sealing property is further laminated on the inside.
And a sheet 2a formed by laminating films 10 provided with fine holes made of

On the other side of the bag material 5, a low-density polyethylene film 11 serving as a base material layer is used as the outermost layer, and a linear polyethylene film 1 having good heat-fusibility is provided inside.
2 is composed of a sheet body 2b formed by laminating two sheets.
In the embodiment of the present invention, the nonwoven fabric 8 on which the conductive ink 7 is printed is used as the antistatic material 4.
The conductive ink 7 may be directly printed on the film 9 and the film 11 and the antistatic material 4 may be provided on both sides.

As described above, carbon black, titanium, stainless steel, or the like was used as the conductive substance 3 used in the anti-static obstacle warmer 1. However, the present invention is not limited to this. Anything that can be done. Preferably, a mixture of a conductive metal, a metal-containing substance, carbon, a carbon-containing substance, and the like in a solvent is used. More preferably, a mixture of carbon black in a solvent as a carbon-containing substance and a mixture of alumina in a solvent as a metal-containing substance may be used. Note that a pigment or an additive can be added in addition to the conductive substance.

As the form of the conductive substance 3 used in the electrostatic warmer 1 according to this embodiment, a conductive ink 7 is preferably used.

As a method for applying the conductive ink 7 used in the antistatic belt warmer 1 according to this embodiment to the sheet 2, the conductive ink 7 can be sprayed and applied. It is good to apply using technology. There are no particular restrictions on the printing technology,
Letterpress printing, gravure printing, and the like are used.

The ratio of providing the conductive material 3 on the surface of the sheet 2 is preferably set in the range of 45% to 100%. If it is 45 [%] or less, the grounding body and the antistatic material, and the antistatic material and the charged body (human body, etc.)
This is because the possibility of contact with the ground decreases, and measures such as increasing the number of times of contact with the grounding body are required, which is troublesome. More preferably, when it is set in the range of 60 [%] to 85 [%], the discharge state is stabilized. This is because, when it is provided in excess of 85 [%], the possibility of contact is not so different from that in the case of 100 [%], so that the conductive ink 7 is wasted and is not economical.

The amount of the conductive substance 3 to be provided on the sheet 2 can be represented by the applied thickness or the plate depth when using the printing technique. Alternatively, it can be represented by an application weight per unit area. The applied thickness or plate depth is preferably 0.05 [μm] to 2 μm.
It is good to be about 00 [μm]. If the thickness is less than 0.05 [μm], the conductive ink 7 may be interrupted on the way and may not be energized. On the other hand, if the thickness exceeds 200 [μm], the conductivity does not change, so that increasing the thickness is not economical.

On the other hand, in the case of the coating weight of the conductive substance per unit area (g / m ² ), it is preferably 0.5 [g / m ^2].
m ² ] to 30 [g / m ² ]. 0.5 [g / m ²
This is because if it is less than 0, the conductive ink may be interrupted in the middle and may not be energized. In addition, 30 [g / m ² ]
When it exceeds, the conductivity does not change much, so it is not economical to increase the coating amount.

The pattern for printing the conductive ink 7 used for the static electricity prevention warmer 1 according to this embodiment on the sheet 2 is such that the grounding body and the charged body (human body) can be easily energized. A pattern that is not interrupted is preferred. For example, a lattice pattern, a wavy pattern, a straight pattern, and the like can be given. It is more preferable to provide a grid pattern over the entire surface of the sheet body 2 because the possibility of contact between the grounded body and the charged body is high.

The exothermic agent 6 used in the hot stove 1 according to this embodiment is not particularly limited, as long as it easily reacts with oxygen in the air and generates heat during this reaction. For example, reduced iron powder, atomized iron powder, potato iron powder and the like are often used.

Here, in consideration of use as a cairo,
As appropriate, it is preferable to add an exothermic auxiliary, an electrolyte solution,
Activated carbon is preferably used as the exothermic auxiliary. As activated carbon, coconut shell activated carbon, wood flour coal, coal, calendar blue coal,
Peat, coke charcoal and the like.

Further, a water-retaining agent such as silica, vermiculite, a water-absorbing polymer, and wood flour may be added.

Examples of the water absorbing polymer include sodium polyacrylate, crosslinked polyacrylate, polyvinyl alcohol, polyvinylpyrrolidone, gum arabic, crosslinked polyalkylene oxide, water-soluble cellulose ether,
Examples include poly-N-vinylacetamide, hydroxyethylcellulose, methylcellulose, sodium alginate, pectin, acrylic sulfonic acid-based polymer, gelatin, polyethylene oxide, carboxymethylcellulose and the like.

[0034] Examples of the electrolyte solution include aqueous solutions of sodium chloride, potassium chloride, calcium chloride, magnesium chloride and the like.

As the bag material 5 containing the exothermic agent 6 used for the electrostatic warmer 1 according to this embodiment,
When using the exothermic agent 6 that generates heat by reacting with oxygen in the air, it is preferable that the exothermic agent 6 be adjusted in air permeability. In addition, since it is the bag material 5, there is also an advantage that it is more flexible to be attached to and carried on the human body than a molded product, so that there is no sense of incongruity,
With flexibility, the possibility of contact between the door knob and the like and the electrostatic interference preventing member can be increased in the case of the ground discharge type.

As described above, the bag member 5 is formed by forming the sheet 2 made of a synthetic resin film, paper, nonwoven fabric, woven fabric, or the like into a bag shape.

In forming the sheet 2,
If the exothermic agent requires air permeability, paper, nonwoven fabric, woven fabric, etc. have many air permeability, so there is no problem. However, synthetic resin films generally have low air permeability as they are. In order to prevent this poor air permeability, the film may be provided with air permeability. The film may be stretched and / or extracted with a soluble filler or perforated with a microneedle to obtain air permeability. Is used. Specifically, for example, polyethylene, polypropylene, cellophane, polyester, polyamide, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride,
Polyurethane, polystyrene, ethylene-vinyl acetate copolymer, polycarbonate, rubber hydrochloride and the like can be mentioned, and among these, those made of polyolefin resin are preferable because a uniform air-permeable film can be obtained by stretching or the like. Examples of the polyolefin-based resin include homopolymers such as polyethylene, polypropylene, and polybutadiene, and copolymers, and blended polymers thereof. In particular, polypropylene (PP), high-density polyethylene (HDPE), and linear low-density polyethylene (L / LDPE) is more preferable than the above viewpoint.

At least one kind of the sheet body 2 may be used as the synthetic resin film, woven fabric or nonwoven fabric. Preferably, the sheet body 2 is formed by laminating the nonwoven fabric and the synthetic resin film having air permeability. .

Next, the operation of the above-structured warmer for preventing electrostatic damage will be described.

A person who has been charged with static electricity has one end of the warming device 1 for preventing static electricity, and the other end of the warming device 1 for preventing static electricity is brought close to or in contact with the ground, so that the human body voltage can be reduced.

Normally, if the human body voltage is 3000 V or less, the human body does not receive an electric shock that causes pain, and the electrostatic damage can be almost completely prevented.

In the embodiment of the present invention, it is not an essential condition that the human body belt voltage is reduced to 3000 [V] or less, but it is sufficient to make it hard to receive an electric shock due to static electricity. Here, the electrostatic damage prevention warmer 1 according to the embodiment of the present invention preferably reduces the charged voltage to 4000 [V] or less, more preferably 3000 [V] or less, as a measure of the electrostatic damage prevention effect. is there.

[0043]

[First Embodiment to Eighth Embodiment] Next,
Specifically, the first to eighth examples were prepared under the conditions shown in Table 1 with respect to the electrostatic damage prevention warmer 1 according to the above embodiment, and the effect of preventing the electrostatic damage was examined.

In the first to eighth embodiments, the exothermic agent 4 is iron powder 28.3.
[G], activated carbon 3.5 [g], vermiculite 7.1
[G], water 12.7 [g], sodium chloride 1.4
[G] was used.

The type of the conductive ink 7, the depth of the printing plate, the density of the conductive substance 3, the ratio of the printing area, and the pattern of the electrostatic obstacle preventing member 4 are as shown in Table 1. In the first to eighth embodiments, the air permeability of the surface of the bag material 5 provided with the electrostatic damage preventing member 4 is 14.5 [sec] / 800 [c] measured by a Gurley-type air permeability meter.
c], and the height and width are 135 [mm]
One having a size of × 100 [mm] was used.

[First Comparative Example and Second Comparative Example] Further, in order to clarify the effects of the present invention, a first comparative example and a second comparative example were prepared. And a comparison with the eighth embodiment.

The warmers according to the first comparative example and the second comparative example have the same structure as that of the first embodiment or the second embodiment except that the static electricity prevention member 4 is not provided and the ink containing no conductive substance 3 is applied. Example 8 was prepared in the same manner as in Example 8.

Table 1 summarizes the conditions of the warmer according to the first comparative example and the second comparative example and the conditions of the warmer 1 for preventing electrostatic damage according to the first to eighth embodiments.

[0049]

[Table 1] 3 to 7 show shapes printed on the nonwoven fabric 8 with the conductive ink 7. Here, FIG. 3 shows a very fine grid 16 printed with a conductive ink 7 on a non-woven fabric 8 as an electrostatic damage preventing member 4, and the printing ratio is 81.
6 [%]. FIG. 4 shows a slightly coarse grid 17 made of conductive ink 7 on nonwoven fabric 8 as antistatic member 4.
Is printed, and the printing ratio is 69.4%. FIG. 5 shows a substantially coarse grid 18 printed on the nonwoven fabric 8 with the conductive ink 7 on the non-woven fabric 8 as the electrostatic damage preventing member 4, and the printing ratio is 52.3 [%]. FIG. 6 shows an example in which a coarser grid 19 is printed on the nonwoven fabric 8 with the conductive ink 7 on the nonwoven fabric 8 as the electrostatic failure preventing member 4, and the printing ratio is 41.9 [%]. FIG. 7 shows an example where the coarsest grid 20 is printed on the nonwoven fabric 8 with the conductive ink 7 on the nonwoven fabric 8 as the electrostatic damage preventing member 4, and the printing ratio is 19.0.
[%]belongs to. Table 1 shows the printing plate depth and printing shading.

Using the warmer 1 for preventing static electricity damage described in the eighth embodiment but not the first embodiment and the warmers according to the first comparative example and the second comparative example prepared as described above, A test for preventing a failure due to the charged static electricity was performed by the test apparatus 21 shown in FIG. 2 as follows. In this test, JIS L 1023 "Test method for performance of fiber floor covering" was used.

First, a test device used for the test will be described. As shown in FIG. 2, a test apparatus 21 used in this test includes an insulating plate 23 disposed on a ground level 22, a carpet 24 disposed on the insulating plate 23, and a work provided on the ground level. Table 25, insulating sheet 26 placed on work table 25, insulating sheet 2
An electrode 27 disposed on the work table 6, a probe 28 facing the electrode plate 27 on the insulating sheet 26, an electrometer 29 connected to the probe 28 and disposed on the work table 25, and disposed on the work table 25. An automatic recorder 30 capable of recording the measurement results of the electrometer 29 and a lead wire 32 connected to the electrode 27 and having a human body voltage measuring probe 31 at its tip.

In the vicinity of the insulating plate 23 of the test apparatus 21, a grounded metal door knob 33 is disposed.

A test is performed using the test apparatus 21 as follows. As shown in FIG. 2, the subject holds the probe 31 for measuring the human body belt voltage and steps on the carpet 24 made of 100% polyester. Then, the subject gradually charges due to friction between the shoes and the carpet.

When the voltage reaches, for example, 3000 [V] or more, the foot is stopped and the static electricity prevention warmer 1 described in the first to eighth embodiments is compared with the first comparative example and the first comparative example. Holding the warmers according to Comparative Example 2 in their hands, and bringing the warmer into contact with the grounded metal door knob 33;
Then, Table 2 shows whether there is an electric shock prevention effect when the metal door knob 33 is grasped with bare hands.

FIG. 8 shows changes in voltage in the first embodiment and the first comparative example. FIG. 8A shows a change in voltage of the warmer 1 according to the first embodiment, and FIG. 8B shows a change in voltage of the warmer according to the first comparative example. The axis represents the human body voltage [V], and the abscissa represents time (work).

In FIG. 8A, when the walking reaches a predetermined voltage of 6000 [V] after the start of walking, the walking is stopped, and when the electrostatic obstacle prevention warmer 1 is brought into contact with the metal door knob 33, the voltage shifts to almost zero [V]. You can see that. On the other hand, in FIG. 8B, a predetermined voltage 6000 [V]
Stop walking when it becomes, and place Cairo on a metal door knob 3
It can be seen that the voltage hardly drops even if the contact is made to touch the metal doorknob 33, and that when the person directly touches the metal doorknob 33, the voltage immediately shifts to zero [V].

Regarding the effect of preventing electric shock, after the respective warmers were brought into contact with the grounded metal door knob 33, the state when the grounded metal door knob 33 was grasped with bare hands was observed, and the electric shock caused by static electricity was observed. The way of receiving was evaluated as follows.

Here, the mark “◎” indicates that no electric shock was received. The mark “○” indicates that the fingertip was slightly stimulated without receiving electric shock. The “x” mark indicates that a strong electric shock was received.

As can be seen from Table 2, in the first to eighth embodiments, after the metal door knob 33 is brought into contact with the metal door knob 33 with the anti-static obstacle warmer 1, the metal door knob 33 is bare handed.
Almost never received an electric shock when touched. However, as shown in Table 2, the sixth embodiment, the seventh embodiment, and the eighth embodiment are arranged such that, after the electrostatic damage prevention warmer 1 is brought into contact with the metal door knob 33, 1500 [V], 10
Although the voltage of 00 [V] and 800 [V] remained,
Thereafter, when the hand was brought into direct contact with the metal door knob 33, the evaluation was "「 "," ○ ", and"「" according to the voltage.

On the other hand, in the warmers described in the first comparative example and the second comparative example, as shown in Table 2 and FIG. Then, the moment he touched the metal door knob 33 with his finger, he received a strong electric shock. Therefore, all the evaluations were "x".

[0061]

[Table 2] As shown in Table 2 above, the person using the static electricity prevention warmer 1 of the first to fifth embodiments and the eighth embodiment effectively eliminates static electricity charged on the human body and removes the grounded body. When the body was brought into contact with the static electricity prevention warmer 1, static electricity was released to the grounding body, and no electric shock was given to the human body.

Further, in the sixth embodiment, even if a grid 19 printed at 41.9 [%] with the conductive ink 7 is printed in order to provide the static electricity prevention member 4, As can be understood from the test results of the second and fourth embodiments, the electric shock can be sufficiently prevented.
It can be understood that printing with the conductive ink 7 is sufficiently practical if it is provided in the range of 45% to 80% of the surface of the sheet member 2.

As can be seen from these embodiments, the static electricity prevention warmer 1 in each embodiment of the present invention has a simple structure and a low cost electrostatic charge on the human body in addition to the function as a normal warmer. The contact voltage is lowered by contacting the grounding body with the grounding body, thereby preventing the human body from receiving an electric shock due to the electrostatic discharge.

[0064]

As described in detail above, according to the present invention, in addition to the function as a normal warmer, the static electricity charged to the human body can be grounded with a simple structure and at a low cost. Evacuation by contact with the body or the like has an effect of lowering a charged voltage and preventing a human body or the like from receiving an electric shock due to electrostatic discharge.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an electrostatic damage prevention warmer according to an embodiment of the present invention.

FIG. 2 is a diagram showing a test apparatus for performing a test for preventing a failure due to static electricity charged on a human body in the embodiment of the present invention.

FIG. 3 is a plan view showing a first embodiment of the present invention in which a very fine lattice is printed on a non-woven fabric with a conductive ink, and the printing ratio is 81.6%. It is.

FIG. 4 is a plan view showing that a slightly coarse lattice is printed with conductive ink on a nonwoven fabric as an antistatic member in an embodiment of the present invention, and the printing ratio is 69.4 [%]. .

FIG. 5 is a plan view showing an example in which a considerably coarse lattice is printed with conductive ink on a nonwoven fabric as an antistatic member in an embodiment of the present invention, and the printing ratio is 52.3 [%]. .

FIG. 6 is a plan view showing a case where a coarser grid is printed on a non-woven fabric as an antistatic member in an embodiment of the present invention, and the printing ratio is 41.9 [%].

FIG. 7 is a plan view showing that a grid is printed most coarsely with a conductive ink on a nonwoven fabric as an antistatic member in an embodiment of the present invention, and the printing ratio is 19.0 [%]. It is.

FIG. 8 is a diagram showing a change in voltage according to the first example of the present invention and a first comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrostatic obstacle prevention warmer 2, 2a, 2b Sheet body 3 Conductive substance 4 Electrostatic obstacle prevention member 5 Bag material 6 Heating agent 7 Conductive ink 8 Nonwoven fabric 9 LDPE film 10 L / LDPE film 11 L / LDPE film 12 LDPE film 16 , 17, 18, 19, 20 Grid 21 Test equipment 23 Insulating plate 24 Carpet 25 Workbench 26 Insulating sheet 27 Electrode 28 Probe 29 Electrometer 31 Human body voltage measuring probe 32 Lead wire 33 Metal door knob

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toru Wakabayashi 2-6-7 Motoasakusa, Taito-ku, Tokyo F-term (reference) in Matai Co., Ltd. 4C099 AA01 CA19 EA09 GA03 JA04 LA05 LA15 LA30

Claims (4)

[Claims] 1. A sheet made of at least one of a synthetic resin film, paper, non-woven fabric and woven fabric, and a charge provided when a conductive substance is applied to the sheet and brought close to or in contact with a grounded body. An electrostatic discharge prevention member, comprising: an electrostatic discharge prevention member for supplying and discharging electricity; a bag material using at least a part of the sheet body; and a heating agent housed in the bag material. . 2. The body according to claim 1, wherein the member for preventing static electricity damage is provided on the surface of the sheet body by a conductive ink containing a conductive substance. 3. The body according to claim 1, wherein the material for preventing electrostatic damage is formed by applying a conductive ink to the surface of the sheet by printing. 4. The body for preventing static electricity damage according to claim 1, wherein the material for preventing static electricity damage is provided in a range of 45 to 100% of the surface of the sheet body.