JP2001120476A - Dust collection bag for electric vacuum cleaner and electric vacuum cleaner provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collection bag for an electric vacuum cleaner, which done little damage by pressure and can keep superior collecting ability and durability for long time usage and the electric vacuum cleaner provided with the dust collection bag. SOLUTION: A dust collection bag for an electric vacuum cleaner is made of a laminated filter medium, which is arranged with at least one medium layer of melt-blow non-woven fabric electret between at least each one layer of inner layer materials 3 and 3' and outer layer materials 1 and 1' using wet or dry non-woven fabric. Flaps 5 of the laminated filter mediums are piled each other to form a tubular body. Edges of the tubular body are folded back and adhered each other to form sealed and folded edge portions of the tubular body 4 and 4' having a suction mouth at an inhalation face. Adhesives 9, 10 and 11 penetrate the inner layer materials 3 and the outer layer materials 1' to the melt-blow non-woven fabrics 2 and 2' to adhere all together and one edge of the outer layer material 1 and the other edge of the outer layer materials 1' is adhered directly by another adhesive 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-collecting bag for a vacuum cleaner having a small pressure loss and excellent in collecting property and durability for a long period of time, and a vacuum cleaner provided with the same.

[0002]

2. Description of the Related Art Conventionally, a dust collecting bag for a vacuum cleaner is formed into a cylindrical shape by filtering a filter material composed of a thin inner layer material and a strong, thicker and harder outer layer material. It is a bag making structure sealed by bonding, fusion or folding.

In this case, a low-weight wet nonwoven fabric or a dry nonwoven fabric is used as an inner layer material, and coarse dust is mainly collected as the outer layer material, and fine dust is collected by a wet nonwoven fabric mainly composed of pulp.

[0004] As described above, since the cylindrical body is formed by the thin inner layer material and the thicker and harder outer layer material, the adhesive easily passes through the inner layer material and the outer layer material and the outer layer material. It was possible to bond the materials and it was strong, and it was possible to collect dust according to the ability of the material of the outer layer material.

[0005] However, this configuration is not preferable because the outer layer material, which is the main component of collection, is quickly clogged and the load on the vacuum cleaner is increased.

[0006] If the clogging is slowed down, there is a problem that the collecting performance is greatly reduced. As this performance improvement, JP-A-2-243127 and JP-A-4-58
No. 927 proposes using an electret meltblown nonwoven fabric as a main filter medium. In these proposals, the former JP-A-2-243127 describes that "cylindrical processing is performed by a heat welding seal". Also, in Japanese Patent Application Laid-Open No. 4-58927,
"Fusion-making by fusion" refers to joining by fusing a nonwoven fabric and / or an adhesive applied to the nonwoven fabric at a portion to be joined to create a bag-like shape in the vacuum cleaner filter pack. As this bonding method, any known method can be adopted, but preferably, heat sealing by heat, a method using an impulse sealer, an ultrasonic wave, a method using a high frequency, etc. are mentioned, but there are descriptions such as these. There is no description of a specific form or method.

However, even if such welding and fusing means are employed, in the technique using a meltblown nonwoven fabric, the permeability of the adhesive to the meltblown nonwoven fabric is poor, the strength of the undrawn yarn is low, and the fusion is difficult. At the interface between the bonded portion and the unfused portion, there was a problem in that the filter material was damaged during practical use, dusts leaked, and the like, and practical application of the body was not possible.

[0008]

SUMMARY OF THE INVENTION In view of the background of the prior art, the present invention provides a dust bag for a vacuum cleaner which has a small pressure loss, is practical for a long period of time, and has excellent collection and durability. It is intended to provide a vacuum cleaner consisting of:

[0009]

The present invention employs the following means in order to solve the above-mentioned problems. That is, the dust bag for a vacuum cleaner of the present invention has at least one or more layers in the intermediate layer between at least one or more inner layer materials 3 and 3 ′ and outer layer materials 1 and 1 ′ selected from a wet or dry nonwoven fabric. The laminated filter medium provided with the melt-blown nonwoven fabrics 2 and 2 ′ formed into electrets is superposed in a cylindrical shape and the body sticking portion 5 is formed.
Is formed into a tubular body, and the end of the tubular body is folded back to form folded tubular ends 4, 4 ', which are sealed and have a suction port in the suction surface. A dust collecting bag for an electric vacuum cleaner, wherein the body pasting portion 5 is sealed with an adhesive 9, 1
0, 11 penetrate through the inner layer material 3 and the outer layer material 1 ′ to bond and integrate the melt blown nonwoven fabric 2, 2 ′;
The end portion of the outer layer material 1 and the outer layer material 1 ′ are directly bonded by another adhesive 12. Further, the vacuum cleaner of the present invention is characterized in that such a vacuum cleaner dust bag is mounted.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention has been made to thoroughly study the above problems, that is, a dust collecting bag for a vacuum cleaner having a small pressure loss and excellent collection properties over a long period of time. The present inventors have tried to solve this problem at once by examining the body sticking with a specific structure.

As described above, by adopting a specific construction of the intermediate layer, the inner layer material, and the outer layer material, it is possible to prevent the leakage of dust and the rupture of the dust collecting bag, and to reduce the initial low pressure loss. Therefore, even in practical use for a long period of time, trapping property and durability can be maintained without any problem.

That is, the dust bag for a vacuum cleaner of the present invention is a laminated filter medium having a laminated structure in which a melt-blown non-woven fabric is laminated on an intermediate layer, and a wet or dry non-woven fabric is laminated on both sides thereof. At least one or more electret melt-blown nonwoven fabrics 2 and 2 ′, and on both sides thereof at least one or more inner layer materials 3 and 3 ′ and outer layer materials 1 and 1 ′ each selected from a wet or dry nonwoven fabric. The laminated filter media are superimposed in a tubular shape to form a body sticking portion 5 to form a tubular body, and the ends of the tubular body are folded back to form folded tubular ends 4, 4 ′, This is a detachable vacuum cleaner dust bag that is configured by sealing the cylindrical body and then attaching an air suction port to the suction surface.

One of the features of the dust bag for a vacuum cleaner according to the present invention resides in the body sticking portion 5 of the tubular body. That is, the body sticking portion 5
Is sealed, the adhesives 9, 10, 11 penetrate the inner layer material 3 and the outer layer material 1 'to bond and integrate the melt-blown nonwoven fabric 2, 2', and furthermore, the end of the outer layer material 1 and the outer layer material 1 ′ has a structure directly adhered by another adhesive 12. To explain these steps in detail,
The melt-blown nonwoven fabric 2 and the inner layer material 3 are adhered by an adhesive 9, the inner layer material 3 and the outer layer material 1 ′ are adhered by an adhesive 10, and the outer layer material 1 ′ and the melt-blown nonwoven fabric 2 ′ are adhered by an adhesive 11. , 10 and 11 are continuously applied in the longitudinal direction of the body sticking portion between the cylindrical ends 4 and 4 ′, and are penetrated and integrated at least partially in the cross-sectional direction to form an adhesive 12. However, the end portion of the outer layer material 1 and the outer layer material 1 ′ are directly bonded to each other.

The second feature is that the end of the tubular body is folded back and joined, that is, the end of the tubular body is folded twice and adhered by an adhesive 23, The folded cylindrical ends 4, 4 'are formed. In the second folding bonding, the outer layer materials 1 and 1 'are bonded with an adhesive 23, and, if necessary, in the first folding bonding, the outer layer materials 1' and 1 'are bonded with an adhesive 24. Further, at the end of the tubular body, the melt-blown nonwoven fabrics 2 and 2 ′ at the suction surface portion and the back surface portion are bonded and integrated by the adhesive 18 through the inner layer materials 3 and 3 ′. Parts 4 and 4 ', and has a structure for preventing leakage of fine dust.

That is, the dust collecting bag for a vacuum cleaner of the present invention uses at least one or more electret melt blown nonwoven fabrics for the purpose of collecting fine dust as an intermediate layer.

This intermediate layer also has the purpose of having a dust-holding property, and is formed by laminating an electret melt-blown nonwoven fabric having a greater fineness or an electret meltblown nonwoven fabric immediately upstream of the electret meltblown nonwoven fabric. Is preferred from the viewpoint of collecting dust and improving durability.

As the material of the melt-blown nonwoven fabric, a homopolymer or copolymer such as a general heat-meltable polymer such as polyolefin, polyester, polycarbonate, or polyamide is used, but a polyolefin-based material is preferable from the viewpoint of effective electret treatment. .

Examples of the polyolefin-based material include polymer materials such as polyethylene-based and polypropylene-based materials. Among them, polypropylene-based materials and homo-polypropylene-based materials are more preferable.

The average fineness of the melt blown nonwoven fabric is as follows:
1-5 μm is preferred. When the thickness is 1 μm or less, the dust collecting property is improved, but the pressure loss is increased, which is not preferable. On the other hand, if the thickness is 5 μm or more, the main purpose of collecting dust is poor, which is not preferable. Therefore, more preferably, 1.5-3.
5 μm.

The basis weight of the melt blown nonwoven fabric is preferably 7 to 30 g / m ² , more preferably 1 to 30 g / m ² .
0 to 25 g / m ² . For 7 g / m ² or less, formation of the nonwoven fabric becomes poor, product unfavorably bulky when it comes to 30 g / m ² or more.

The electret processing method for the melt-blown non-woven fabric may be performed by a conventional method. For example, the melt-blown non-woven fabric is supplied to a drum-shaped ground electrode, and a high voltage of 10 to 40 kv of direct current is applied from a wire electrode to a position 3 to 10 cm away. This is achieved by applying the voltage for about 1 to 10 seconds.

In the construction of the dust bag for a vacuum cleaner, the inner layer material disposed on the upstream side of the electret meltblown nonwoven fabric has a main purpose of suppressing an increase in pressure loss and protecting the electret meltblown nonwoven fabric.

That is, for example, when large dust directly covers the electret meltblown nonwoven fabric, the filtration area is sharply reduced, and when the heavy vacuum dust is sucked by the vacuum cleaner, the electret meltblown nonwoven fabric is unstretched nonwoven fabric. Therefore, the inner layer is protected by such an inner layer material, since the strength is weak and it is easily damaged, and when it receives a force such as abrasion in bag making processing, it is easily broken.

The intermediate layer made of the melt-blown nonwoven fabric of the present invention is protected by laminating an inner layer made of a wet or dry nonwoven fabric having high strength on both sides. As such an inner layer material, a wet nonwoven fabric composed of a single or a combination of synthetic fibers, pulp and rayon, and a dry nonwoven fabric composed of a single or a combination of polyolefin, polyester and rayon are preferably used. Among such dry nonwoven fabrics, spunbonded nonwoven fabrics are more preferably used. Such spunbonded nonwoven fabrics include, for example, polyolefins,
A single yarn or a composite yarn made of a polyester-based or polyamide-based material, or a yarn made of a mixed fiber is preferably used, and more preferably, a heat-bonded type is higher in modulus than a needle-punched type because it has a higher modulus.

The basis weight of the inner layer material is preferably 10 to
At 25 g / m ² , the ventilation rate is preferably 100-500 c
One having a range of c / cm ² · sec is used.

In the construction of the dust-collecting bag for a vacuum cleaner, the outer layer material disposed downstream of the electret melt-blown non-woven fabric protects the electret melt-blown non-woven fabric having a low strength against deformation when the dust-collecting bag is used and protects it from deformation and low pressure loss. The main purpose is to be. The material constituting the outer layer material may be the same as the inner layer material, but as long as the air flow rate is 70 cc / cm ² · sec or more, there is no problem in load resistance during use. However, in a wet nonwoven fabric made of paper, it is difficult to obtain a predetermined strength with an air flow rate exceeding 300 cc / cm ² · sec.
Those having a ventilation rate of 0 cc / cm ² · sec or less are preferably used.

The basis weight of the outer layer material that satisfies such a ventilation rate is as follows:
Preferably 25 to 55 g / m ² is used. 2
If it is less than 5 g / m ² , the strength may not be partially satisfied due to the unevenness of the filter cloth. If it exceeds 55 g / m ² , the desired strength can be easily satisfied, but the dust collection bag becomes thick and hard. Too much, making bag-making workability difficult, and a predetermined ventilation rate cannot be obtained.

The dust-collecting bag has an antibacterial, anti-mildew and anti-mite function, and a function of preventing odors generated from these dead bodies and other dust, for capturing various bacteria, mites and other insects. Is beneficial to the user. For this reason, it is preferable to subject the inner layer material, the melt-blown nonwoven fabric, and the outer layer material to any of antibacterial, mite-proof, and odor-proof, or to use them together. It is preferable to apply such processing to the inner layer material to which at least a large amount of dust adheres and the melt-blown nonwoven fabric. As the antibacterial treatment and the antifungal treatment, a method used in a usual manner can be employed. For example, JP-A-6-313269, JP-A-59-866
No. 32, JP-A-59-163474 and the like can be used. In addition, Japanese Unexamined Patent Publication
No. 313269 discloses a drug as an inner layer material,
Melt blown nonwoven fabrics and those kneaded into the fiber-forming resin of the outer layer material are also effective and preferably used. Also,
For mites and fleas, for example,
No. 458 can be used.

The adhesive used in the present invention is selected from hot melt type, emulsion or solvent type adhesives such as polyolefin, EVA, acrylic, polyester, polyamide, rubber, etc. at each site. Being used.

In the above-described dust collecting bag composed of the intermediate layer, the inner layer material, and the outer layer material, when the airflow containing dust is discharged to the outside of the dust collecting bag, the intermediate layer electret melt blown must be used. By passing through the nonwoven fabric layer,
For the first time, the dust-collecting bag is capable of obtaining high dust-collecting efficiency.

Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the suction surface of the dust bag. Reference numeral 6 denotes a support plate attached to the main body of the vacuum cleaner, and air containing dust flows into the dust collection bag from the suction port 7 and is filtered inside the bag.

FIG. 2 is a perspective view of the back of the dust bag.
The folded cylindrical end portions 4 and 4 ′ are sealed by folded joining, and further form a body sticking portion 5.

The cylindrical body sticking portion 5 may be located at any position of the back portion 16, the gather portion 17, and the suction surface portion 15, and can be selected depending on the suitability for bag making, the appearance quality of the dust bag, and the like. The back 16 is preferred.

FIG. 3 is a cross-sectional view showing an example of the body sticking portion 5 shown in FIG.
It is a sectional enlarged view of A '. The material of the dust collecting bag is basically formed of a three-layer structure of an outer layer material 1, an intermediate layer melt-blown nonwoven fabric 2, and an inner layer material 3, and is formed in a cylindrical shape. The melt blown nonwoven fabric 2 'and the inner layer material 3' are overlapped and bonded.

According to the present invention, a completely airtight and high-strength dust collecting bag is made possible by bonding the structure of the body sticking portion to a specific bag-making structure.

The sealing of the body sticking portion 5 is performed by the melt-blown nonwoven fabric 2
And the inner layer material 3 are bonded by an adhesive 9, the inner layer material 3 and the outer layer material 1 'are bonded by an adhesive 10, the outer layer material 1' and the melt-blown nonwoven fabric 2 'are bonded by an adhesive 11, and The adhesives 9, 10, and 11 are continuously applied in the length direction of the body sticking portion between the folded cylindrical end portions 4 and 4 ', and the adhesive penetrates at least partially in the cross-sectional direction to be integrally bonded. Is becoming

When the inner layer material 3 is relatively thin and porous, the adhesive 10 is used as the adhesive by also using the adhesive 9 to penetrate the inner layer material 3 and adhere the melt-blown nonwoven fabric 2 also. In some cases, the application of the adhesive 9 can be omitted.

Similarly, when the outer layer material 1 'is relatively low in weight and porous, the adhesive 10 also bonds not only the outer layer material 1' but also the melt-blown nonwoven fabric 2 'therethrough.
The adhesive 11 can also be used, and the application of the adhesive 11 can be omitted. However, since the bonding of the outer layer materials 1 and 1 'requires a high adhesive strength and the strength of the outer layer material itself, it is necessary to use a material having a relatively high density as the outer layer material. Therefore, it is preferable to separately bond using the adhesive 11.

Next, the melt-blown non-woven fabric has a low strength, and even if it is made with the above-mentioned adhesive, it is liable to be broken when wind pressure is applied to this layer. For this reason, the outer layers 1, 1 ′ must be directly bonded by the adhesive 12. In this mode, as long as a firm direct bonding area is secured, a portion of the end of the melt-blown nonwoven fabric 2 or the inner layer material 3 may be bonded to the adhesive 12 at all.

The adhesive 13 is for bonding the intermediate layer 2 'made of melt-blown nonwoven fabric and the inner layer material 3', and is an adhesive for preventing the inner layer material from being turned up.

Therefore, it is preferable that the melt-blown non-woven fabric 2 'and the inner layer material 3' are applied to and adhered to the ends as much as possible, and that the adhesives 9, 10 and 11 which are penetrated are adhered on the inner side. I do.

The adhesive 14 is used for the purpose of performing auxiliary bonding so that the melt-blown nonwoven fabric 2 and the outer layer material 1 are not easily peeled off and easily laminated in the body sticking process. Therefore, strong bonding is not required,
It is sufficient that the processability of the bag making process is kept stable.

FIG. 4 shows an example in which the end of the outer layer material 1 is bent and adhered to the outer layer material 1 '. This method is a preferable mode because the outer end of the outer layer material is not exposed to the outside, so that the appearance of the dust bag is improved.

FIG. 5 shows that the adhesives 9, 10, 11 penetrate at least partially in the cross-sectional direction and are integrated, and
This shows an example in which at least one of 10 and 11 is adhered to the adhesive 12.

FIG. 6 shows a comparative example, in which any one of the adhesives 9, 10, and 11 does not penetrate in the cross-sectional direction, so that the air flow containing the inhaled dust causes the melt-blown nonwoven fabrics 2 and 2 'to pass through. This is an example in which fine dust is discharged without being collected because it does not pass through.

Even in the case of a dust collecting bag for a vacuum cleaner in which at least one of the inner layer material, the intermediate layer and the outer layer material is composed of a plurality of layers, the sealing of the body sticking portion 5 requires an adhesive between any of the plurality of layers. And at least partly penetrate and bond with the adhesives 9, 10, and 11 in the cross-sectional direction, thereby achieving the desired effect of the layer having a plurality of layers. can get.

FIG. 7 is a perspective view showing an example of an end portion of a cylindrical body formed by sticking the body.
And a gather surface 17.

FIG. 8 is an enlarged cross-sectional view showing an example in which the end of the cylindrical body of BB ′ in FIG. 7 is adhered by the adhesive 18, that is, it is applied to the inside of the inner layers 3 and 3 ′. The adhesive 18 penetrates through the inner layer material and melt-blown nonwoven fabric 2,
It reached 2 ', indicating that the adhesive was integrated. In this case, a relatively thin and porous nonwoven fabric is used for the inner layers 3 and 3 'so that the adhesive 18 can easily penetrate.

FIG. 9 is a cross-sectional view taken along the line CC ′ of the folded cylindrical end 4 when the end of the cylindrical body of FIG. 8 is folded twice, and is an enlarged view showing an example of the folded cylindrical end. is there. When the end of the tubular body is folded and joined, this portion is most likely to concentrate stress (peeling stress) as the shape of the dust bag. For this reason, the ends of the tubular body are folded twice to form folded tubular ends 4 and 4 ′. In the second folded joining, the outer layer materials 1 and 1 ′ are firmly bonded by the adhesive 23. Glued. In addition, if necessary, in the first turn-back joining, if the outer layer materials 1 'and 1' are adhered with the adhesive 24, even if the adhesive 23 in the second turn-back joining is peeled off by stress, it is difficult to break the bag, and the dust is removed. Leakage can be prevented. The adhesives 23 and 24 penetrate the outer layer materials 1 and 1 ′ and have good contact with each other depending on the type of the adhesive to be used and the basis weight, air permeability, apparent density, etc. of the outer layer material. In some cases, the adhesive may reach the melt-blown nonwoven fabric on the back surface. Adhesive 23,
24 is preferably adhered with a constant width to the end portion as continuously as possible in the folded length L direction shown in FIG.
Two or more coatings may be applied in parallel. Furthermore, the melt-blown nonwoven fabrics 2 and 2 ′ are bonded to the inner layer
, So that fine dust can be collected by the melt-blown nonwoven fabrics 2 and 2 ′ even if an air flow enters. The adhesive 18 is preferably adhered to the end in the direction of the folded length L, but the effect is obtained only in the vicinity of both ends where the stress is most likely to leak. The folded width W usually varies depending on the size and shape of the dust bag, but is preferably in the range of 10 to 25 mm from the viewpoint of bag making workability and function.

FIG. 10 is a perspective view showing an example of the vacuum cleaner main body when the dust collecting case of the vacuum cleaner equipped with the dust bag of the present invention thus obtained is opened.

The vacuum cleaner according to the present invention is characterized in that such a vacuum cleaner dust bag is mounted.
That is, as shown in FIG. 10, the outer casing is constituted by a vacuum cleaner main body 20 constituted by a lower case 25, an upper case 26 and a front cover 27, and a dust collecting chamber 21 formed in the cleaner main body.
An example is an electric vacuum cleaner having a dust collecting bag 22 provided in the dust collecting chamber and an electric blower (not shown) for generating a suction force, which is accommodated in the main body of the cleaner. .

The above fineness, basis weight and air permeability were measured by the following methods. 1) Fiber diameter average single denier SEM photograph enlarges the fiber, measures 100 fiber widths,
Indicated by median value. 2) Basis Weight of 0.5m square sample is measured and converted to 1m square weight. 3) Air permeability Measured based on JIS L1096 Frazier method.

[0053]

According to the present invention, it is possible to provide a vacuum cleaner dust bag which suppresses a rise in pressure loss, is completely sealed, and is durable without leaking fine dust, and a vacuum cleaner including the same. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a suction surface portion of a dust bag according to the present invention.

FIG. 2 is a perspective view showing an example of a back portion of the dust bag according to the present invention.

FIG. 3 is a view showing one example of the body sticking portion 5 of the present invention.
It is a sectional enlarged view of A '.

FIG. 4 is an enlarged cross-sectional view of AA ′ showing another example of the body sticking portion 5 of the present invention.

FIG. 5 is an enlarged cross-sectional view taken along the line AA ′ showing still another example of the body sticking portion 5 of the present invention.

FIG. 6 is an enlarged cross-sectional view of AA ′ of the body sticking portion 5 showing a comparative example of the dust bag according to the present invention.

FIG. 7 is an enlarged perspective view showing an example of an end portion of a cylindrical body formed by sticking the dust bag of the present invention on the body.

FIG. 8 is an enlarged cross-sectional view showing an example in which the end of the cylindrical body of BB ′ in FIG.

9 is a cross-sectional view taken along line CC 'of FIG. 2 when the end of the cylindrical body of FIG. 8 is folded twice, and is an enlarged view showing an example of the folded cylindrical end.

FIG. 10 is a perspective view showing an example of the main body of the vacuum cleaner when the dust collecting case of the vacuum cleaner equipped with the dust collecting bag of the present invention is opened.

[Explanation of symbols]

 1, 1 ': outer layer material 2, 2': melt-blown non-woven fabric 3, 3 ': inner layer material 4, 4': folded cylindrical end portion 5: body sticking portion 6: support plate 7: suction port 8: gather portion 9, 10, 11, 12, 18, 23, 24: adhesive 13: adhesive for preventing the inner layer material from turning up 14: auxiliary adhesive 15: suction surface 16: back surface 17: gather surface 20: vacuum cleaner body 21: dust collection chamber 22: Dust collection bag 25: Upper case 26: Lower case 27: Front cover W: Fold width L: Fold length

Continued on the front page (71) Applicant 000005108 Hitachi, Ltd. 4-6-1, Kanda Surugadai, Chiyoda-ku, Tokyo (72) Inventor Eiichi Nishiura 3-360, Ookaga, Matsuyama-shi, Ehime Prefecture Toray Fine Chemical Co., Ltd. 72) Inventor Kunio Suzuki 1-12-5 Kyobashi, Chuo-ku, Tokyo Inside Yoshikawa Paper Trading Co., Ltd. (72) Inventor Yasuo Ishii 1-2602 Wakasa 1-chome, Tokorozawa-shi, Saitama Pref. Person Masaro Sunagawa 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Taga Electronics Co., Ltd.

Claims (7)

[Claims] 1. A melt-blown nonwoven fabric 2, 2 'in which at least one or more electret layers are formed in at least one intermediate layer between at least one inner layer material 3, 3' and at least one outer layer material 1, 1 'selected from a wet or dry nonwoven fabric. Are laminated in a tubular shape to form a body sticking portion 5 to form a tubular body, and the end of the tubular body is folded back to form a folded tubular end 4, 4 ′.
A dust-collecting bag for a vacuum cleaner having a suction port formed on a suction surface thereof, wherein the adhesive 9, 10, 11 is sealed by an inner layer material. 3 and the melt-blown nonwoven fabric 2, 2 ′ are bonded and integrated through the outer layer material 1 ′, and the end of the outer layer material 1 and the outer layer material 1 ′ are directly bonded by another adhesive 12. A dust bag for a vacuum cleaner. 2. The sealing of the body affixing part 5 is performed by bonding the melt-blown nonwoven fabric 2 and the inner layer material 3 with an adhesive 9, the inner layer material 3 and the outer layer material 1 'with an adhesive 10, the outer layer material 1' and the melt-blown nonwoven fabric 2 '. Are respectively bonded by an adhesive 11,
In addition, the adhesives 9, 10, 11 are continuously applied in the length direction of the body sticking portion between the folded tubular ends 4, 4 ', and penetrate at least partially in the cross-sectional direction. The dust bag for an electric vacuum cleaner according to claim 1, wherein the dust bag is bonded and integrated. 3. At least one selected from the inner layer material, the intermediate layer and the outer layer material is a dust collecting bag for a vacuum cleaner constituted in a plurality of layers, wherein the body sticking portion 5 is sealed. The plurality of layers are adhered, and the position is determined by the adhesive 9, 10, 11
3. The dust collecting bag for a vacuum cleaner according to claim 1, wherein the dust collecting bag is the same as the above, and at least partially penetrates and is integrated. 4. At the end of the tubular body, the melt-blown nonwoven fabrics 2, 2 'at the suction surface and the back surface are bonded and integrated through the inner layer material 3, 3' by an adhesive 18, and The dust collecting bag for an electric vacuum cleaner according to any one of claims 1 to 3, wherein the dust collecting bag comprises the end portions 4, 4 '. 5. The end of the tubular body is folded twice, and at least in the second folding joining, the outer layer materials 1, 1 ′ are formed.
Are bonded by an adhesive 23, and the folded cylindrical end portion 4,
The dust collecting bag for a vacuum cleaner according to any one of claims 1 to 4, wherein the dust collecting bag constitutes 4 '. 6. An electric vacuum cleaner equipped with the dust collecting bag for an electric vacuum cleaner according to claim 1. 7. A vacuum cleaner main body formed by arranging a plurality of cases forming an outer shell, a dust collecting chamber formed in the vacuum cleaner main body, and 7. The electric vacuum cleaner according to claim 6, further comprising a dust bag disposed therein, and an electric blower that generates a suction force and is stored in the main body of the vacuum cleaner.