JP2009135144A - Electromagnetic wave shield packing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic wave shield packing bag that can follow up inside/outside atmospheric pressure variations, has superior electromagnetic shielding performance having high sealing property at an opening portion after an electromagnetic wave shielded object is stored, and is lightweight, manufactured at a low cost and suitable to be carried and used. <P>SOLUTION: Disclosed is the packing bag for forming a space where the electromagnetic wave shielded object is to be stored, the electromagnetic wave shield packing bag being molded out of an electromagnetic wave shield material 54 made of a laminate film having a conductive material laminated on one surface of a base material. The packing bag 50 has a resealable opening portion 52 nearby its top and includes a sealing mechanism for sealing the opening portion 52. The sealing mechanism is adaptive to block electromagnetic waves to be transmitted, and the maximum gap width of a gap where electromagnetic wave can be transmitted in such a state that the opening portion is sealed is ≤500 μm, and equal to a diameter when the gap shape is circular, to a short diameter when it is an elliptic shape, or to the length of a short side when it is rectangular. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging bag for forming a space in which an electromagnetic wave shielding object is stored. More specifically, the present invention relates to an electromagnetic wave shielding packaging bag that is excellent in electromagnetic wave shielding performance, is lightweight and inexpensively manufactured, and is suitable for carrying and using.

In recent years, electromagnetic waves generated from communication devices such as mobile phones have been adversely affected by the human body and malfunctions of surrounding electronic devices have become a problem, and so-called non-contact type IC card data is stolen. Measures for shielding electronic devices from unnecessary electromagnetic waves are becoming increasingly important, for example, countermeasures against skimming are a problem.
In particular, mobile phones have become an indispensable tool for daily life and are widely used in large quantities, so the impact on social life is increasing. As the mobile phone population grows, if there is a person who turns on the power without knowing where it is used, or that the mobile phone automatically turns on at the reserved time of the mobile phone In some cases, the power is inadvertently turned on, and a situation in which a ringing tone of a mobile phone suddenly starts to cause discomfort to the surrounding people is increasing.
For this reason, in hospitals, movie theaters, performance halls, hotel conference rooms, etc., it has become desirable to construct electromagnetic wave shielding measures for entire buildings or specific rooms, and to construct facilities that are completely shielded from electromagnetic waves. Yes.
However, it is generally difficult to spread electromagnetic wave shielding measures for the entire building or the entire room because of the high construction costs.

  In addition, recently, electronic devices having a specific communication function such as a mobile phone brought into the aircraft have an adverse effect on the communication control function of the aircraft. In the “Notification that stipulates electronic devices, etc. that may interfere with the safety of aircraft operations” (2007 Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1120) enforced on October 1, 2007, Use in airplanes is restricted by law (Aviation Law) according to the following categories (1) to (3).

(1) Any device that has the ability to emit strong radio waves is prohibited.
(2) Although it does not have its own radio wave emission function, the one that generates strong electromagnetic waves during use is prohibited only during takeoff and landing.
(3) Electromagnetic waves that are extremely weak and that do not cause instrument failure can always be used.

  Electronic devices that are always prohibited from use in (1) include mobile phones, electronic game machines that use silent functions, wireless mice, wireless headphones, wireless communication between computers, active IC tags, wireless keys, Wireless control toys, transceivers, wireless earphones / microphones, and portable information terminals that use wireless functions are included.

  The electronic devices that are prohibited from being always used in (1) cannot be used in the aircraft at all, so even if the power is turned on by the carelessness of the passenger who brought these electronic devices into the aircraft, the communication control of the aircraft There is a need for fundamental safety measures that eliminate adverse effects on functions. For this reason, even if it is convenient, a means for shielding electromagnetic waves by an inexpensive method is required. For example, there is a need for a method of shielding electromagnetic waves transmitted to the outside at all times when a mobile phone is turned on.

  On the other hand, a simple method for shielding an electromagnetic wave shielding object from electromagnetic waves has been used for a long time. For example, a commercially available X-ray shielding bag used to carry silver halide photographic film when traveling abroad is used to protect the silver halide photographic film from being exposed to X-ray irradiation performed during baggage inspection at airports. A shielding bag made of a thin sheet of lead is used. This product is known to have been used at least since 1975, when overseas travel using aircraft began to become widespread.

By the way, many prior arts have already been disclosed with respect to a packaging bag having an electromagnetic shielding property for accommodating communication equipment such as a mobile phone and completely blocking communication with the outside.
For example, a laminated film in which a metal foil is laminated on a base material (see Patent Documents 1, 3, 4, 5, and 6), and a deposited film in which a metal vapor-deposited film is applied to a base material (Patent Documents 3, 4, 5, and 8) ), And fabrics woven with conductive fibers (see Patent Document 4) are known.
JP 59-201856 A Japanese Utility Model Publication No. 4-03003 Japanese Utility Model Publication No. 6-019543 JP-A-7-245496 Utility Model Registration No. 3044327 JP 2001-171683 A JP 2002-046790 A JP 2004-329818 A

For example, Patent Document 1 discloses a sheet-like electromagnetic shielding material in which a fabric is bonded and laminated on one side of a metal foil using an adhesive, and the metal foil has excellent electromagnetic shielding performance. It is shown. It is also useful as a cover packaging material for various items, bags, bag materials, electronic component covers, X-ray room walls, and bank card holders.
However, there is no description regarding a specific embodiment for housing the electromagnetic wave shielding object.

Further, in Patent Document 2, a double-layer film or sheet composed of a support layer and a conductive material layer laminated or coated on one side thereof is folded in two with the conductive material layer inside, and both wings are further provided. There is disclosed an electrostatic breakdown preventing bag which is folded into two on the outer surface and sealed at both side edges to form a bag shape. This is for storing products that are easily destroyed by static electricity, such as IC cards and IC modules. In this ESD protection bag, the conductive material layer is in contact with the inside, and the inside and outside of the bag are at the same potential. Therefore, the IC card stored in the bag is at the same potential as that of the bag, and the bag is grounded by hand. In this case, there is an effect that no potential difference is applied to the IC card. In addition, since the conductive material also acts as an electromagnetic shielding material, it is possible to prevent adverse effects due to electromagnetic waves.
However, the opening of this anti-static breakdown bag remains open to the atmosphere, and no device for shielding electromagnetic waves transmitted through the opening is shown.

Patent Document 3 discloses a packaging bag in which an aluminum foil or an aluminum-deposited shield layer is provided between an inner fabric and an outer fabric to form a bag. It is a dedicated packaging bag for rental videotapes or CD cassettes, and is used to prevent taking out of the store without permission. If a video tape or CD cassette having an RFID tag (wireless IC tag) is housed inside the bag, there will be no resonance due to the RFID tag even if it passes through a doorway (RFID tag detector) where high-frequency electromagnetic fields are stretched. However, when an item with an RFID tag attached is not stored in the bag and passes through the doorway, it can be prevented from being stolen by being reliably detected.
However, the opening of the packaging bag for storing the contents is sealed with a fastener, but there is no description about measures for preventing electromagnetic waves from passing through the gaps in the fastener member. . For example, there is no suggestion or disclosure regarding a method for preventing electromagnetic waves from leaking from a gap when a fastener using a conductive material is used or when a finer is opened and a finer is sealed.

Further, Patent Document 4 discloses a multilayer film composed of an insulator layer as an outer layer, a conductor layer as an intermediate layer, and a heat-sealable insulator layer as an inner layer as a packaging bag material. Folded so that the layer is on the inside, heat sealed at both ends and sewn with conductive thread, the upper and lower sides of the opening have no heat sealable insulator layer and the conductor layer is exposed An electromagnetic wave shielding surrounding bag provided with a conductive adhesive tape on one side of the exposed band is disclosed. In addition, as the conductor layer serving as the intermediate layer, a metal foil such as an aluminum foil, a laminated film of the metal foil and a plastic layer, a bag material in which a fibrous base material on which metal is vapor-deposited can be used. It is said.
This electromagnetic wave shield enclosure is an alternative to the electromagnetic wave shielding method in which an electronic circuit board provided in a housing according to the prior art is covered with a metal plate or a metal plating film inside a plastic housing.
Inside the electromagnetic wave shield enclosure, as an example of an electronic component, an electronic circuit board is stored with the front end side of the flexible wiring extended from the opening, and then the peelable sheet is peeled off and then the opening is crimped. Sealing with a conductive adhesive tape is disclosed as an embodiment.

In addition, in Patent Document 5, as a material for a packaging bag, a film in which a metal deposition film is provided on a base material, a laminated film in which a metal foil is bonded to the base material, and a fibrous base material in which metal deposition is performed are woven. A bag material and an electromagnetic shielding bag using the bag material are disclosed.
By the way, according to Patent Document 5, as an electromagnetic wave shielding material, a film having a thickness of 20 to 80 nm (200 to 800 angstroms) deposited on a base material, or a base material having a thickness such as aluminum, or a base material has a thickness. A laminated film to which a metal foil of 7 to 9 μm is bonded, and a bag material in which a fibrous base material on which metal is deposited are woven are disclosed. The electromagnetic wave shielding characteristic shown in FIG. 3 of Patent Document 5 shows the electromagnetic wave shielding characteristic of each material itself for a metal foil such as an aluminum foil, but includes an opening in a state molded into a packaging bag. It does not indicate electromagnetic shielding performance.
Patent Document 5 discloses a method for sealing an opening after an electromagnetic wave shielding object is stored in a storage bag by storing a mobile phone or the like inside and folding it at an upper fold. A space surrounded by an aluminum vapor deposition film is formed inside, and mobile phones and the like are enclosed in this space (see paragraph 0016). Regarding the sealing method of the opening, electromagnetic shielding is not considered by using special means.
It is a well-known fact that the metal foil itself has an extremely high electromagnetic shielding performance unless there is a pinhole. However, a packaging bag that exhibits high electromagnetic shielding performance as a whole is disclosed, while maintaining the excellent electromagnetic shielding performance of the metal foil and ensuring the hermeticity of the opening. Further, there is no disclosure of an electromagnetic wave shielding packaging bag in which expansion and destruction due to a pressure difference between the inside and outside of the packaging bag are prevented while maintaining electromagnetic wave shielding performance.

  Patent Document 6 discloses a bag body composed of an electromagnetic wave shielding sheet formed by sticking a synthetic resin material layer to one side of an electromagnetic wave shielding material layer made of an aluminum material layer. An electromagnetic shielding bag that stores electronic and electrical devices such as mobile phones and electronic toys that may adversely affect peripheral devices due to electromagnetic waves, and shields electromagnetic waves generated from these electronic and electrical devices. It is possible to shield electromagnetic waves simply by sealing the mouth.

Further, Patent Document 7 discloses an electromagnetic wave shielding bag having a bag shape by providing a metal vapor deposition layer on a base material or bonding a metal foil to the base material. The thickness of the aluminum vapor deposition layer vapor-deposited on a base material is 20-80 nm (200-800 angstrom). Alternatively, the thickness of the metal foil adhered to the substrate is 7 to 9 μm.
Patent Document 8 discloses a mobile phone packaging bag using a film in which a metal vapor deposition film is formed on a film resin.

  However, these conventional techniques are electromagnetic shielding packaging bags that can also be used in an aircraft, and can prevent expansion and destruction due to a pressure difference between the inside and outside of the packaging bag, and the opening gap after sealing the packaging bag. An electromagnetic wave shielding packaging bag that shields electromagnetic waves transmitted from the surface and is excellent in electromagnetic wave shielding performance has not been known.

  The present invention has been made in view of the above circumstances, and can follow atmospheric pressure fluctuations inside and outside, and has high sealing performance of the opening after storing the stored electromagnetic shielding object, and excellent electromagnetic shielding performance. It is an object of the present invention to provide an electromagnetic wave shielding packaging bag that is lightweight and inexpensive and is suitable for carrying and using.

  In order to solve the above problems, the present invention is a packaging bag for forming a space in which an electromagnetic wave shielding object is stored, and an electromagnetic wave comprising a laminated film in which a conductive material is laminated on one surface of a substrate. A shielding material is molded, and has a re-sealable opening near the top of the packaging bag, and the packaging bag has a sealing mechanism for sealing the opening, and the sealing mechanism Is capable of shielding the transmission of electromagnetic waves, the maximum gap width of the gap that can transmit electromagnetic waves in a state where the opening is sealed is 500 μm or less, the maximum gap width is a diameter in a circular gap shape, Provided is an electromagnetic wave shielding packaging bag characterized in that an elliptical shape has a short diameter and a rectangular shape has a short side length.

The packaging bag is preferably provided with at least one vent hole having a maximum gap width of 500 μm or less that can transmit electromagnetic waves.
The top part of the packaging bag is made of a conductive material and is used to reinforce sealing such as linear fasteners, occlusion tools such as surface fasteners, flap parts coated with an adhesive layer, and openings. Of sealing mechanisms that seal the top opening, such as sealing pieces coated with a pressure-sensitive adhesive layer, sealing pieces coated with a pressure-sensitive adhesive layer that seals over the entire periphery of the opening It is preferable that at least one selected from the inside is provided.

The conductive material is preferably a woven fabric made of metal foil or conductive fiber yarn.
It is preferable that at least one active type IC tag for inspection of an electromagnetic wave shielding function is disposed inside the packaging bag.
The electromagnetic wave shielding object is a mobile phone, an electronic game machine using a wireless function, a wireless mouse, a wireless headphone, wireless communication between computers, an active IC tag, a wireless key, a wireless toy, a transceiver, a wireless earphone -It is preferable that it is 1 type or multiple types selected from the electronic device group which has a communication function which is always prohibited use in an aircraft, such as a microphone and a portable information terminal using a wireless function.

  According to the electromagnetic wave shielding packaging bag of the present invention, it is a packaging bag for forming a space in which an electromagnetic wave shielding object is stored, and has a resealable opening in the vicinity of the top of the packaging bag, The packaging bag is provided with a sealing mechanism for sealing the opening, and the sealing mechanism is capable of shielding the transmission of electromagnetic waves, and is the largest gap that can transmit electromagnetic waves in a state where the opening is sealed. The gap width is 500 μm or less, and the maximum gap width is a diameter for a circular gap shape, a short diameter for an elliptical shape, and a short side length for a rectangular shape. Can be shielded.

Further, according to the electromagnetic wave shielding packaging bag of the present invention, in the packaging bag forming the space in which the electromagnetic wave shielding object is accommodated, at least one or more air holes having a maximum gap width of 500 μm or less capable of transmitting electromagnetic waves, Since it is arranged, it is possible to follow the atmospheric pressure fluctuation inside and outside the packaging bag, and it is possible to avoid the packaging bag from expanding and being damaged.
In addition, since at least one active type IC tag for inspecting the electromagnetic wave shielding function is disposed inside the packaging bag, the opening near the top of the packaging bag is sealed. Therefore, it is possible to determine whether the sealing mechanism for forming the sealed space that shields the transmission of electromagnetic waves is functioning normally by measuring whether the signal transmitted from the active IC tag can be received. The reliability of the electromagnetic wave shielding packaging bag according to the present invention is increased.

  From the above, according to the present invention, it is possible to follow fluctuations in atmospheric pressure inside and outside, and the airtightness of the opening after storing the stored electromagnetic wave shielding object is high, and the electromagnetic wave shielding performance is excellent. In addition, it is possible to provide an electromagnetic wave shielding packaging bag that is manufactured inexpensively and is suitable for carrying and using.

The present invention will be described below with reference to the drawings based on the best mode.
FIG. 1 is a schematic cross-sectional view showing an example of an electromagnetic wave shielding film used in the present invention. FIG. 2 is a schematic sectional view showing another example of the electromagnetic wave shielding film used in the present invention. FIG. 3 is a perspective view showing an embodiment of the electromagnetic wave shielding packaging bag according to the present invention. FIG. 4 is a schematic cross-sectional view taken along the line AA in FIG. FIG. 5 is a perspective view showing another embodiment of the electromagnetic wave shielding packaging bag according to the present invention. FIG. 6 is a perspective view showing another embodiment of the electromagnetic wave shielding packaging bag according to the present invention. Fig.7 (a) is a perspective view which shows another embodiment of the electromagnetic wave shield packaging bag based on this invention, FIG.7 (b) is a schematic sectional drawing of the BB arrow in Fig.7 (a).

FIGS. 8A to 8C are sealing mechanisms for sealing the opening of the top according to the present invention, and are perspective views showing an example of use of a flap portion and a sealing piece, and FIG. FIG. 9 is a partial enlarged cross-sectional view of a portion C in FIG. 9 (a) to 9 (c) are perspective views showing a sealing mechanism for sealing the opening of the top part according to the present invention, which is a perspective view showing another use example of the flap part and the sealing piece, and FIG. ) Is a partial enlarged cross-sectional view of a portion D in FIG.
FIG. 10 is a plan view showing an embodiment of an electromagnetic wave shielding packaging bag provided with a sealing piece for sealing with a margin of overlap around the entire periphery of the opening according to the present invention. FIG. 11 is a sealing mechanism for sealing the opening of the top part according to the present invention, and shows an example of use of a sealing piece that is sealed with an overlap margin all around the opening (a) perspective view (B) Cross-sectional view before sealing, (c) Cross-sectional view after sealing.
12 (a) to 12 (c) are other examples of a sealing mechanism for sealing the opening of the top according to the present invention, and are perspective views showing an example of use of sealing pieces.

1 is a partial schematic cross-sectional view of an electromagnetic wave shielding material 5 used in the present invention, which is an electromagnetic wave shielding material 5 made of a laminated film in which a metal foil 3 is laminated on one side of a base material 1 with an adhesive material 2 interposed therebetween. Show. If necessary, a protective film 4 is laminated on the metal foil 3 with an adhesive 2 interposed therebetween.
FIG. 2 shows another electromagnetic shielding material 6 used in the present invention. The electromagnetic shielding material 6 is made of a laminated film in which the base material 1 is directly laminated on one surface of the metal foil 3 by a method such as extrusion lamination. The partial schematic sectional drawing of is shown. If necessary, a protective film 4 is laminated on the metal foil 3 with an adhesive 2 interposed therebetween.

  The metal foil 3 used in the present invention is not particularly limited as long as it is a metal having excellent conductivity, such as an aluminum foil (aluminum foil), a copper foil, a tin foil, a lead foil, a nickel foil, and a silver foil. Aluminum foil is preferred because the material price for the metal foil is relatively low and it is light and soft. The thickness of the aluminum foil can be about 3 to 60 μm, and particularly about 7 to 20 μm is suitably used as the thickness. The thickness of the aluminum foil is preferably set to a thickness of at least 3 μm from the standpoint that an electromagnetic wave shielding effect is exhibited and handling is easy. When the thickness of the aluminum foil is thicker than 60 μm, it is not preferred because it lacks flexibility when molded into a packaging bag.

Moreover, as a conductive material used for the electromagnetic wave shielding material of the present invention, a woven fabric made of conductive fiber yarn is used in addition to the metal foil. The woven fabric made of the conductive fiber yarn may be woven after finishing the conductive fiber in which the metal film is formed on the non-conductive fiber yarn by the electroless plating method, or may be non-conductive. After weaving with fiber yarn and finishing it into a cloth, a metal film may be finally formed by electroless plating. Note that the conductive fiber in which a metal film is formed on a non-conductive fiber thread by electroless plating and then woven into a cloth is coated with electroless plating all around the conductive fiber thread. Therefore, since all the fibers contribute to the electromagnetic wave shielding effect, there is an advantage that the electromagnetic wave shielding performance is high.
Synthetic fibers such as nylon, polyester, and acrylic are preferably used as the fiber type used in the present invention. The electroless plating is performed after an activation treatment for fixing the catalyst core to the fiber yarn. Most commonly, palladium chloride is used as a catalyst nucleus, and electroless copper plating or electroless nickel plating is performed.

  Examples of the base material 1 used in the present invention include paper such as high-quality paper, glassine paper, and coated paper, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyphenylene sulfide (PPS), polyethylene, Examples thereof include polyolefin resins such as polypropylene, synthetic resins such as polyvinyl chloride resins, polyurethane resins, acrylic resins, and fluorine resins, but a laminated film using one or more of these may also be used.

In particular, a laminated film with a metal foil using a polyolefin resin as a sealant layer is preferably used. The sealant layer is a sheet-like or film-like polyolefin having heat-fusibility, and specifically, low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, polybutylene, ethylene-propylene copolymer. As long as the resin can be used as a normal packaging material, there is no particular limitation.
Although there is no restriction | limiting in particular in the shape of the base material of a sealant layer, It is preferable that it is a roll-shaped elongate film. Although there is no restriction | limiting in particular in the thickness of the film of a sealant layer, Generally it is convenient on handling to set it as the thickness of 2 micrometers-100 micrometers, More preferably, it is about 5 micrometers-60 micrometers. If the thickness of the film of the sealant layer is less than 2 μm, it tends to be wrinkled, and if it is thicker than 60 μm, the flexibility is lowered.

In addition, when an electromagnetic shielding material having a sealant layer using a heat-sealable polyolefin film is used, the members can be joined using a heat seal device in the process of manufacturing the packaging bag by molding the electromagnetic shielding material. Therefore, the working efficiency is superior to the case of joining while applying an adhesive or a pressure-sensitive adhesive, and the number of manufacturing steps and the manufacturing cost of the packaging bag can be reduced.
The method for producing an electromagnetic shielding material having heat-fusibility may be obtained by preparing a polyolefin resin film having heat-fusibility and then laminating the metal foil via an adhesive layer. A melt of a polyolefin-based resin having the above may be melt-extruded and laminated on a metal foil.

The sealant layer made of a polyolefin resin having heat-fusibility according to the present invention is preferably an unstretched (sometimes referred to as non-stretched) resin film having excellent heat-fusibility. This is because the resin film that has been uniaxially or biaxially stretched has reduced heat-sealing properties, particularly heat-sealing strength.
The resin film having heat-fusibility is produced by a conventional molding method. As a method for molding a resin film, for example, a melt extrusion molding method such as an inflation method or a T-die method, or a step of pouring and adhering a molten resin onto a drum or a stainless steel smooth belt having a smooth surface and heating the same And a solution casting method in which the solvent is evaporated to form a film. In the case of polyolefin resin, a resin film is produced mainly by a melt extrusion molding method.

  In the standing pouch type electromagnetic wave shielding packaging bag 10 which is one of the embodiments of the present invention shown in FIGS. 3 and 4, the two trunk members 11 and the bottom member 12 have the sealant layer as the innermost layer as described above. In this way, the three sides of the bottom and both side edges are heat-sealed, leaving the top opening 14. Inside the electromagnetic wave shielding packaging bag 10, at least one active type IC tag 18 for inspecting the electromagnetic wave shielding function is disposed. The width dimension of the heat seal part 13 is about 3 to 16 mm although it depends on the overall dimensions of the packaging bag.

In FIG. 3, the top part of the packaging bag is provided with a resealable opening 14 for accommodating the electromagnetic wave shielding object. Once the electromagnetic wave shielding object is stored in the packaging bag, the packaging bag is sealed using a sealing mechanism that seals the opening 14.
The sealing mechanism that seals the opening of the top part is made of a conductive material, such as a linear fastener, an occlusion tool such as a surface fastener, a flap part coated with an adhesive layer, and a sealing of the opening part. Sealing pieces that seal the top of the opening, such as sealing pieces coated with a pressure-sensitive adhesive layer to reinforce the sealing, and sealing pieces coated with a pressure-sensitive adhesive layer that seals the entire periphery of the opening. One or more selected from the mechanism group is provided. In FIG. 3, the linear fastener 15 is provided in the position where a pair of trunk | drum members 11 and 11 mutually oppose, Furthermore, the flap part 17 to which the adhesive layer 16 was apply | coated to one trunk | drum member 11 is opened. It is provided in the upper part of the part 14. After closing the linear fasteners 15 and 15 made of the conductive material, the flap portion 17 is bent to seal the opening portion 14 and the electromagnetic wave is transmitted through the gap after the opening portion 14 is sealed. Reduce

With this sealing mechanism, it is important that the gap of the opening left on the top of the packaging bag has a maximum gap width of 500 μm or less. This is because, when the top opening is sealed, if there is at least one portion having a maximum gap width of 500 μm or more, electromagnetic waves leak from the gap and electromagnetic wave shielding performance cannot be obtained.
In the present invention, the maximum gap width is a diameter in a circular gap shape, a short diameter in an elliptical shape, and a short side length in a rectangular shape.

In addition, the electromagnetic wave shielding packaging bag of the present invention is provided with at least one vent hole having a maximum gap width of 500 μm or less through which electromagnetic waves can be transmitted, thereby opening an opening in the vicinity of the top of the packaging bag. After sealing, the air inside the packaging bag can be exhausted to adjust the outer shape of the packaging bag, or the pressure difference between the inside and outside of the packaging bag can be prevented from expanding and damaging the bag.
As for the dimensions of the air holes, the maximum gap width is preferably 500 μm or less. The maximum air gap width is a diameter in the case of a circular air gap, a short diameter in the oval shape, and a short side length in the rectangular shape. This is because if there is at least one portion having a maximum air gap width of 500 μm or more, the electromagnetic wave leaks from the air hole and a predetermined electromagnetic wave shielding performance cannot be obtained.

If the actual size of the vent hole is circular, the diameter is preferably about 20 to 300 μm. This is because if the diameter is 20 μm or less, the number of ventilation holes increases.
The number of vent holes to be arranged is not particularly limited, but if the vent holes are close and dense, the mechanical strength of the electromagnetic wave shielding film is lowered, which is not preferable. For example, if a plurality of ventilation holes are provided, the intervals between the ventilation holes may be several millimeters, and the total number may be about 2-50. The ventilation holes can be drilled by mechanical means by pressing a sharp needle. Also, when the electromagnetic shielding material is a laminated film of aluminum foil and polyolefin resin film, the polyolefin resin absorbs it. It is also possible to make fine holes in the aluminum foil using a carbon dioxide laser having no wavelength.

  In FIG. 3, a through hole 8 is provided in a part of the heat seal portion 13 at the upper left end of the packaging bag 10, and a string 9 for hanging is passed therethrough. When the electromagnetic wave shielding target is relatively small, for example, a packaging bag containing a mobile phone or the like is convenient because it can be prevented from being lost if it is hung from the neck.

  In FIG. 4, at least one or more active type IC tags 18 for inspecting the electromagnetic wave shielding function are disposed inside the electromagnetic wave shielding packaging bag 10. Therefore, it is determined whether or not the sealing mechanism for sealing the opening 14 near the top of the packaging bag and forming a sealed space for shielding the transmission of electromagnetic waves is functioning normally. Since the signal transmitted from the tag 18 can be measured outside the packaging bag, the reliability of the electromagnetic wave shielding performance of the electromagnetic wave shielding packaging bag according to the present invention can be enhanced.

  There are no particular restrictions on the specifications of the active type IC tag 18 for testing the electromagnetic wave shielding function, but it is sufficient that the transmission distance is an output of several meters to several tens of meters, and an extremely high output is not required. . Also, an integrated management system that associates the identification number of the active IC tag 18 for testing the electromagnetic wave shielding function housed in the individual electromagnetic wave shielding packaging bag 10 with the owner or the location of the individual electromagnetic wave shielding packaging bag 10 is provided. If prepared, the identification number of the IC tag can be instantaneously determined by the integrated management system from the transmission / reception from the active IC tag, and the specific electromagnetic shielding packaging bag 10 having a defect can be quickly confirmed. The problem in this case is that the opening of the packaging bag is not sealed, or the opening is incompletely sealed, and the sealing mechanism based on the present invention is not functioning normally. It is. When it is found that the sealing mechanism based on the present invention is not functioning normally, a countermeasure is taken such as transferring the electromagnetic wave shielding object to another electromagnetic wave shielding packaging bag to solve the problem.

  In FIG. 5, the packaging bag 20 has a shape of a gusset pouch formed by folding a single electromagnetic wave shielding film 21 and forming a back-sticking seal 22 and a square bottom seal 23. The top of the packaging bag 20 is made of an electrically conductive material, a bite fastener such as a linear fastener or a surface fastener, a folding overlap provided with an adhesive layer, and the entire circumference of the opening. One or more selected from a sealing mechanism group that seals the opening of the top, such as a sealing piece that is sealed with an overlap margin, for example, a linear fastener 24 is provided.

In FIG. 6, a packaging bag 25 is formed by heat-sealing a body member 26 made of two electromagnetic shielding films, each of which is made of an electromagnetic shielding material.
7 (a) and 7 (b), the packaging bag 27 is formed by folding one sheet of electromagnetic shielding material in half, with the crease 28 as the bottom, and sealing both side edges 29, and has a cylindrical bag shape. It is what you are doing.
The top of the packaging bags 25 and 27 is made of a conductive material, and is made of an occlusion device such as a linear fastener and a surface fastener, a folding overlap margin provided with an adhesive layer, and an opening portion. One or more selected from a sealing mechanism group that seals the top, such as a sealing piece that seals the entire periphery with a margin of overlap, for example, a linear fastener 24 is provided.

FIGS. 8A to 8C are perspective views showing a use example of a flap part provided with a pressure-sensitive adhesive layer, which is a sealing mechanism for sealing an opening of a top part according to the present invention. FIG. 8D is a partial enlarged cross-sectional view of a portion C in FIG. In the partial detailed view of FIG. 8D, the gap 39 generated when the flap portion 32 is bent and sealed with the adhesive material 36 is due to the step t when the opening 37 is closed, and the maximum gap width thereof. Is the elliptical minor axis s.
In the present invention, it is important to set the maximum gap width of the gap left on the top of the packaging bag to 500 μm or less. This is because, when the top opening is sealed, if there is at least one gap having a maximum gap width of 500 μm or more, electromagnetic waves leak from the gap and electromagnetic wave shielding performance cannot be obtained. For this reason, in the heat seal portions 31, 31 provided on both side edges of the packaging bag, the overlap portion of the flap portion 32 is provided with a sufficient turn-back allowance 33, and is overlapped to a position exceeding both ends 34 of the heat seal portion 31. Let ’s say 35. As shown in FIG. 8 (b), the flap portion 32 is folded and bonded to prevent leakage of electromagnetic waves through the gap 39 (see FIG. 8 (d)) generated at both ends 34 of the heat seal portion 31. After that, the sealing piece 40 (see FIG. 8C) to which the pressure-sensitive adhesive layer is applied may be further overlapped.
In this case, the adhesive layer 36 is not applied to the entire surface of the flap portion 32, but is applied with an emphasis on the vicinity of the opening 37 as shown in FIG. It is preferable to leave the area 38 when grasping by hand.

9 (a) to 9 (c) are perspective views showing another use example of the flap portion to which the pressure-sensitive adhesive layer is applied, which is a sealing mechanism for sealing the opening of the top portion according to the present invention. FIG. 9D is a partial enlarged cross-sectional view of a portion D in FIG. 9B. In order to avoid a gap between the bent portions 41 (see FIG. 8D) that occurs when the flap portion 32 is folded back, the flap portions 32 are provided on both sides of the opening portion 37, and one or both of the flap portions 32 is provided with an adhesive. A layer 36 is formed, and the flap portions 32 and 32 are bonded together at an extension line of the heat seal portion 31 provided on both side edges of the packaging bag and sealed with an adhesive. After laminating the flap portion 32 as shown in FIG. 9 (b) so as not to leak electromagnetic waves through the gap 39 (see FIG. 9 (d)) generated at both ends 34 of the heat seal portion 31. Further, the sealing piece 40 (see FIG. 9C) to which the pressure-sensitive adhesive layer is applied may be further overlapped.
In addition, the flap part provided with either the linear fastener or the surface fastener, and the adhesive layer shown in FIG. 8 and FIG. May be used in combination.

FIG. 10 is a plan view showing an embodiment of an electromagnetic wave shielding packaging bag provided with a sealing piece for sealing with a margin of overlap around the entire periphery of the opening according to the present invention.
FIG. 11 is a sealing mechanism for sealing the opening of the top part according to the present invention, and shows an example of use of a sealing piece that is sealed with an overlap margin all around the opening (a) perspective view (B) Cross-sectional view before sealing, (c) Cross-sectional view after sealing.
The sealing piece 51 to which the pressure-sensitive adhesive material 53 is applied has a release film for protecting the adhesive material. When the opening 52 at the top of the packaging bag 50 is sealed, the release film is sealed. Is peeled off to expose the adhesive material 53, and then the top opening 52 is covered with a sealing piece 51 to be sealed. In particular, the use example of the sealing piece shown in FIGS. 10 and 11 has a feature that the upper end 55 of the top part is heat-sealed and an opening 52 is formed on a part of the body member 54 on a plane. For this reason, the sealing piece 51 which covers the opening part 52 may also be a planar shape, and since there is no need to bend the sealing piece 51, there is no possibility that a gap will be generated in the bent part. Therefore, the sealing mechanism using the sealing piece 51 shown in FIGS. 10 and 11 can be preferably used because the maximum gap width of the gap left on the top of the packaging bag can be reliably reduced to 500 μm or less.

The sealing piece 51 is prepared by sticking a part thereof to the packaging bag with an adhesive material in a positioned state so that the opening 52 at the top of the packaging bag 50 can be immediately sealed. It may be placed separately, or it may be separated from the packaging bag, prepared separately and placed, and pasted together.
The sealing piece 51 used for this invention is produced using the material which has electroconductivity similarly to other sealing mechanisms. For example, an adhesive material may be applied to one side of a non-transparent electromagnetic shielding material made of a metal foil laminated film, or an adhesive material may be applied to one side of a transparent electromagnetic shielding film It may be what you did. Moreover, you may use together the planar fastener produced using the material which has electroconductivity, and the sealing piece 51 shown in FIG.

FIGS. 12A, 12B, and 12C show a sealing mechanism for sealing the top opening 37 according to the present invention, in which a sealing piece 43 coated with a pressure-sensitive adhesive layer 42 is used. FIG.
The sealing piece 43 has three folded portions 44, 45, and 46. By folding each side in order, the gap can be further reduced and the effect of shielding electromagnetic waves transmitted through the gap is enhanced. In addition, on the top of the packaging bag, either a linear fastener or a planar fastener made using a conductive material, and a sealing piece 43 coated with an adhesive layer shown in FIG. You may use together.

  The present invention provides an electromagnetic wave shielding packaging bag, and mainly has a communication function that is always prohibited in an aircraft, a mobile phone, an electronic game machine using a wireless function, a wireless mouse, and a wireless headphone. , Radio communication between PCs, active IC tags, wireless keys, other radio-controlled toys, transceivers, wireless earphones / microphones, portable information terminals that use wireless functions, etc. It is intended to prevent electromagnetic waves generated from electronic devices from leaking out of the packaging bag.

By the way, mobile phones, electronic game machines that use wireless functions, wireless mice, wireless headphones, wireless communication between PCs, active IC tags, wireless keys, other wireless toys, transceivers, wireless earphones and microphones, The portable information terminal uses electromagnetic waves (radio waves) in a band of about 30 MHz to 10 GHz.
For example, an 800 MHz band, a 1.5 GHz band, and a 2.0 GHz band are used as the frequency band of the mobile phone. Various frequencies are used for an electronic game machine that uses a wireless function, and as an example, the 2.4 GHz band is used. The wireless mouse uses a 27 MHz band, a 2.4 GHz band, and the like.
For example, a 2.4 GHz band is used for the wireless headphones. For example, a 430 MHz band of 300 MHz to 1000 MHz band is used for the active IC tag. For example, 27 MHz is used for the wireless keyboard. For example, a 400 MHz band is used for a transceiver for conversation. For communication with a personal computer or the like, a 2.4 GHz band or a 5 GHz band wireless LAN, or a UWB (Ultra Wideband) wireless LAN using a frequency band of 3 to 9 GHz is used.

Electromagnetic waves have the property of being transmitted and reflected even when gaps smaller than the wavelength are open on the metal surface. When the frequency is 30 MHz to 10 GHz, the wavelength of the electromagnetic wave is 10 m to 3 cm. The electromagnetic shielding material itself used in the present invention is a laminated film in which a conductive material such as a woven fabric made of metal foil or conductive fiber yarn is laminated on at least one surface of a base material, and has high electromagnetic shielding performance. Is.
However, in order to improve the electromagnetic wave shielding performance as the electromagnetic wave shielding packaging bag of the present invention, it is necessary to make the maximum gap width of the gap capable of transmitting electromagnetic waves with the opening of the packaging bag sealed to 500 μm or less. Here, the maximum gap width is a diameter in a circular gap shape, a short diameter in an elliptical shape, and a short side length in a rectangular shape. In addition, it is preferable that the length | longer_axis when a space | gap is elliptical or the long side in rectangular shape is below the wavelength of the electromagnetic waves which should be shielded.
In addition, the ventilation holes arranged in one or more quantities in the packaging bag are required to have a maximum gap width of 500 μm or less of gaps through which electromagnetic waves can be transmitted.
This is because when the maximum gap width of the gaps present in the packaging bag exceeds 500 μm, the ratio of electromagnetic waves that are transmitted without being reflected by the conductive material of the electromagnetic wave shielding material increases, and the electromagnetic wave shielding performance decreases.

  According to the present invention, it is possible to follow fluctuations in atmospheric pressure inside and outside, and has high sealing performance of the opening after storing the stored electromagnetic wave shielding object, and excellent in electromagnetic wave shielding performance, and is manufactured at a light weight and at low cost. Since we can provide an electromagnetic shielding packaging bag suitable for carrying around, mobile phones, electronic game machines that use silent functions, wireless mice, wireless headphones, wireless communication between computers, active IC tags, wireless To store electronic devices that have communication functions that are normally prohibited in airplanes, such as keys, radio-controlled toys, transceivers, wireless earphones and microphones, and portable information terminals that use wireless functions, as electromagnetic wave shielding objects. It can be useful.

It is a schematic sectional drawing which shows the example of the electromagnetic wave shielding film used for this invention. It is a schematic sectional drawing which shows another example of the electromagnetic wave shielding film used for this invention. It is a perspective view which shows one Embodiment of the electromagnetic wave shielding packaging bag which concerns on this invention. It is a schematic sectional drawing of the AA arrow in FIG. It is a perspective view which shows another embodiment of the electromagnetic wave shield packaging bag which concerns on this invention. It is a perspective view which shows another embodiment of the electromagnetic wave shield packaging bag which concerns on this invention. (A) is a perspective view which shows another embodiment of the electromagnetic wave shield packaging bag based on this invention, (b) is a schematic sectional drawing of the BB arrow in (a). (A)-(c) is a sealing mechanism which seals the opening part of the top part which concerns on this invention, Comprising: It is a perspective view which shows the usage example of a flap part and a sealing piece, (d) is (b) It is a partial expanded sectional view of the C section. (A)-(c) is a sealing mechanism which seals the opening part of the top part which concerns on this invention, Comprising: It is a perspective view which shows the usage example of another flap part and sealing piece, (d) is ( It is a partial expanded sectional view of D section of b). It is a top view which shows one Embodiment of the electromagnetic wave shield packaging bag provided with the sealing piece which gives an allowance to the perimeter of the opening part and seals based on this invention. The sealing mechanism which seals the opening part of the top part based on this invention, Comprising: (a) Perspective view which shows the usage example of the sealing piece which gives an overlap margin to the perimeter of an opening part, (b) It is sectional drawing before sealing, (c) It is sectional drawing after sealing. (A)-(c) is another example of the sealing mechanism which seals the opening part of the top part which concerns on this invention, Comprising: It is a perspective view which shows the usage example of a sealing piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material, 2 ... Adhesive material, 3 ... Metal foil, 4 ... Protective film, 5, 6 ... Electromagnetic shielding material, 8 ... Through-hole, 9 ... Hanging string, 10 ... Standing pouch type electromagnetic shielding packaging Bag, 11 ... trunk member, 12 ... bottom member, 13 ... heat seal part, 14 ... opening, 15 ... linear fastener, 16 ... adhesive layer, 17 ... flap part, 18 ... IC tag, 20 ... gusset pouch shape Electromagnetic wave shielding packaging bag, 21 ... Electromagnetic shielding film, 22 ... Back sticker seal, 23 ... Square bottom seal, 24 ... Linear fastener, 25 ... Electromagnetic shielding bag, 26 ... Body member, 27 ... Electromagnetic shielding packaging bag, 28 ... Fold, 29 ... Side edge, 31 ... Heat seal part applied to both side edges, 32 ... Flap part, 33 ... Folding allowance, 34 ... Tip of heat seal part, 35 ... Overlap allowance, 36 ... Adhesion Layer, 37 ... opening, 38 ... area when grasped by hand, 39 ... gap, 40 ... sealing piece coated with adhesive layer, 41 ... bent part, 42 ... adhesive layer, 43 ... sealing piece, 44, 45, 46 ... folded portion, 50 ... electromagnetic wave shielding packaging bag, 51 ... flat sealing piece, 52 ... opening of body member, 53 ... adhesive material, 54 ... body member, 55 ... upper end.

Claims (6)

  A packaging bag for forming a space in which an electromagnetic wave shielding object is stored, wherein the packaging bag is formed by molding an electromagnetic shielding material made of a laminated film in which a conductive material is laminated on one surface of a substrate. There is an opening that can be resealed in the vicinity of the top of the bag, and the packaging bag has a sealing mechanism for sealing the opening, and the sealing mechanism can shield the transmission of electromagnetic waves. The maximum gap width of the gap that can transmit electromagnetic waves in a state where the opening is sealed is 500 μm or less. The maximum gap width is a diameter in a circular gap shape, a short diameter in an elliptical shape, and a short side in a rectangular shape. An electromagnetic shielding packaging bag characterized by having a length of.   2. The electromagnetic wave shielding packaging bag according to claim 1, wherein the packaging bag is provided with at least one vent hole having a maximum gap width of 500 μm or less through which electromagnetic waves can pass.   The top part of the packaging bag is made of a conductive material and is used to reinforce sealing such as linear fasteners, occlusion tools such as surface fasteners, flap parts coated with an adhesive layer, and openings. Of sealing mechanisms that seal the top opening, such as sealing pieces coated with a pressure-sensitive adhesive layer, sealing pieces coated with a pressure-sensitive adhesive layer that seals over the entire periphery of the opening The electromagnetic wave shielding packaging bag according to claim 1, wherein at least one selected from the inside is provided.   4. The electromagnetic wave shielding packaging bag according to claim 1, wherein the conductive material is a woven fabric made of metal foil or conductive fiber yarn. 5.   5. The electromagnetic wave shielding package according to claim 1, wherein at least one active type IC tag for inspection of an electromagnetic wave shielding function is disposed inside the packaging bag. bag.   The electromagnetic wave shielding object is a mobile phone, an electronic game machine using a wireless function, a wireless mouse, a wireless headphone, wireless communication between computers, an active IC tag, a wireless key, a wireless toy, a transceiver, a wireless earphone 6. One or more types selected from a group of electronic devices having a communication function that is always prohibited in an aircraft, such as a microphone and a portable information terminal using a wireless function. The electromagnetic wave shielding packaging bag according to any one of the above.

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