JP4927262B2 - Filter medium and disposable dust mask using the filter medium - Google Patents
Filter medium and disposable dust mask using the filter medium Download PDFInfo
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- JP4927262B2 JP4927262B2 JP2001085097A JP2001085097A JP4927262B2 JP 4927262 B2 JP4927262 B2 JP 4927262B2 JP 2001085097 A JP2001085097 A JP 2001085097A JP 2001085097 A JP2001085097 A JP 2001085097A JP 4927262 B2 JP4927262 B2 JP 4927262B2
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- 239000000428 dust Substances 0.000 title claims description 28
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 description 20
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 14
- 239000002245 particle Substances 0.000 description 14
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 9
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 9
- 238000001914 filtration Methods 0.000 description 9
- 238000011045 prefiltration Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 239000011780 sodium chloride Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Filtering Materials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、通気抵抗を高くすることなく高捕集効率を有し、かつ捕集効率の低下の少ないろ過材及び該ろ過材を使用した使い捨て式防じんマスクに関する。
【０００２】
【従来技術】
取替式防じんマスクのろ過材はメカニカルフィルタでは同心円状に折り畳まれたり或いは平行に折り畳まれているもの、静電ろ過材では打ち抜いただけの平板状のものが一般的である。そして、使い捨て式防じんマスク或いは簡易マスクにおいては、静電ろ過材のタイプが一般的である。使い捨て式防じんマスクでは、一般的に微細な粉じんを捕集するメインフィルタを中心とし、その外側に比較的大きな粉じんを捕集するプレフィルタが、また、その内側にマスクの形状を保持するサブフィルタとからなるろ過材部とろ過材を顔面に接し、鼻及び口に該当する部分を開口した接顔部とからなっている。そして、メインフィルタのろ過材は熱をかけた後のしぼり加工若しくは若しくは平板を数枚接合することにより椀形形状に成形されている。
メインフィルタに使用されるろ過材部の素材は、不織布に帯電処理をしたろ過材を一般的に使用しているが、粉塵を捕集する原理によって２つに大別される。その一つは静電フィルタであり、他方はメカニカルフィルタである。静電フィルタはろ過材の有する静電気によって粉塵を引きつけ、捕集するのであるが、一般にオイルミスト等を捕集すると電荷が失われるため捕集効率が低下しやすいといわれている。他方、メカニカルフィルタは捕集原理がろ過材の形状や配置だけによる単純なものであり、従って、一般にオイルミストを捕集しても捕集効率は低下し難いといわれている。ただ、メカニカルフィルタは素材が緻密なため静電フィルタと比較すると単位面積あたりの通気抵抗が高い場合が多く、従って、通気抵抗を低下させるには広いろ過面積を必要とすることが殆どであり、立体的に加工することが必要であった。
また、ろ過材の素材としては取替え式防じんマスクのろ過材として使用されているガラス繊維等の複合繊維が、帯電不織布に比べ、通気抵抗が高いので、使い捨て式防じんマスクのろ過材の素材としてガラス繊維等の複合繊維を利用する場合には、有効ろ過面積を広くしなければならない。
【０００３】
【発明が解決しようとする課題】
このような状況の下において、外観を小さいままに通気抵抗を低く保ちつつ高捕集効率を有し、かつ捕集効率の低下の少ないろ過材及び使い捨て式マスクについて種々検討した結果、本発明を完成したもので、本発明の目的は通気抵抗を高くすることなく有効ろ過面積を確保して高捕集効率を有し、かつ捕集効率の低下が少ないろ過材及び使い捨て式マスクを提供することである。
【０００４】
【課題を解決するための手段】
本発明の要旨は、ガラス繊維の不織布よりなり、鼻部を覆う部分の中央部を高く、その外縁部は鼻部から口部を覆うような輪郭に沿った線で、その外縁部に向かって次第に低く段差をもって円筒状の蛇腹状に折り畳まれていることを特徴とする使い捨て式防じんマスク過材であり、前記ろ過材の素材はガラス繊維を抄紙して得たものである。即ち、本発明は、メインフィルタろ過材を鼻部を覆う部分の中央部を高く、その外縁部は鼻部から口部を覆うような輪郭に沿った線で、その外縁部に向かって次第に低く段差をもって円筒状の蛇腹状に折り畳むことにより、メインフィルタの外形及び大きさ、即ち投影面積は従来の使い捨て式マスクと変わることなく小さく小型で、且つ大きな有効ろ過面積を確保することができ、これによって高い捕集効率で低抵抗且つ捕集効率の低下の少ない使い捨て式防じんマスクを実現した。
【０００５】
【発明の実施の形態】
本発明について詳細に説明する。
本発明にかかる使い捨て式防じんマスク用ろ過材（以下、単にろ過材という場合がある
。）は鼻部を覆う部分の中央部を高くその外縁部は鼻部から口部を覆うような輪郭に沿った線でその外縁部に向かって次第に低く段差をもって同筒状の蛇腹状に折り畳まれている。ろ過材に使用するろ過材素材は、従来この種のマスクに使用されているセルロース繊維、合成繊維等よりなる不織布でも良いが、取替え式防じんマスクに使用されているガラス繊維、レーヨン、パルプ、炭素繊維若しくはこれらの混合繊維等の繊維よりなる不織布を使用することが好ましい。そして、ろ過材は上記の繊維を抄紙して、これを鼻部を覆う部分を高く中心とし、これより口部を覆う部分をその周辺部とし、これに向かって低く段差を設けて蛇腹状に折り畳んだ形状をしている。
本発明にかかるろ過材の斜視図を図１に、また、その平面図を図２に、中心線ＡＡで切断した断面図を図３にそれぞれ示す。図１〜３においてろ過材１は鼻部を覆う中央部２，蛇腹状に折り畳まれた部分３及び口辺部を覆う周辺部４よりなっている。このろ過材は防じんマスクのフィルタ部として使用する。
【０００６】
本発明にかかる使い捨て式防じんマスクとは所謂簡易マスクとも称されているものであってろ過材が交換できる取替え式防じんマスク以外のマスクをいう。そして、本発明にかかる使い捨て式防じんマスクは、プレフィルタ、メインフィルタ及びサブフィルタよりなるろ過部と顔面に接する接顔部とが一体となり、しめひもにより装着出来るようになっている。
プレフィルタは比較的大きな粉塵を捕集し、かつメインフィルタの破損を防ぐ。メインフィルタは本発明の使い捨て式防じんマスクの機能を決める主体となるフィルタであり、先に述べた本発明のろ過材を使用する。すなわち、鼻部を覆う部分の中央部を高くその外縁部に向かって次第に低く段差をもって蛇腹状に折り畳まれている（図１〜３参照）。サブフィルタはメインフィルタの保護をする。接顔体は鼻及び口に接する中央部分が開口し、その周辺部が前記フィルタ部に接着して顔面に密着するようになっている。接顔部は熱可塑性樹脂で構成されていて、プレフィルタ、メインフィルタ及びサブフィルタよりなるフィルタ部の外周と熱接着されている。
【０００７】
本発明にかかる使い捨て式防じんマスクの構成を図４に示す。本発明の使い捨て式防じんマスクは上記ろ過材を使用したメインフィルター１を中心とし、その外側にプレフィルタ５を、内側にサブフィルタ６をそれぞれ配置しこれらを一体としてフィルタ部を構成する。そして、サブフィルタ６に接顔体７を重ねフィルタ部と接顔部とを接着して一体としその外周にしめひも取付具８を設ける。
なお、フィルタ部はメインフィルタのろ過材素材によってはサブフィルタを省略し、メインフィルタとプレフィルタからなっていても良い。
【０００８】
本発明のろ過材の製造方法の一例について述べる。まず、ガラス繊維を抄紙網で抄紙し、これを折り畳み機にセットする。折り畳み機は入り子状に折り畳み可能な円筒状の成形機である。この折り畳み機の外周にガラス繊維等よりなる不織布を被せ、折り畳み機を順次折り畳むことによって、ガラス繊維等よりなる不織布を折り畳んでその中央部が高く、外縁部に向かうに従って低く段差を設けて円筒状の蛇腹状に成形する。
【０００９】
【実施例】
実施例１
ガラス繊維、レーヨン及びパルプ等からなるろ過材素材をもって、図４に示すメインフィルタを中心とし、その外側にポリオレフィン系の不織布とネットよりなるプレフィルタを、またその内側にポリオレフィン系繊維よりなる不織布よりなるサブフィルタを配置し、これらを積層して一体とする。
得られた使い捨て式防じんマスクの性能及び劣化について試験した。
【００１０】
捕集性能試験方法は試験粒子としてフタル酸ジオクチル（ＤＯＰ）または塩化ナトリウム（ＮａＣｌ）を使用し、粒子捕集効率測定器に装着した防じんマスクの内側へ、試験粒子含有空気を８５ｌ／ｍｉｎの流量で通じ、ろ過材に供給される試験粒子が一定値に達するまでの経過において、防じんマスク通過前及び通過後の試験粒子の濃度を散乱光方式による試験粒子濃度測定器により連続的に測定する。
試験粒子含有空気として、ＤＯＰの場合ＤＯＰのミストの粒径分布の中央値が０．１５〜０．２５μｍでその幾何標準偏差が１．６以下であって、且つ、ＤＯＰの濃度が１００ｍｇ／１ｍ3以下で、その変動がプラスマイナス１５％以下のものをいい、ＮａＣｌの場合ＮａＣｌの粒径分布の中央値が０．０６〜０．１μｍでその幾何標準偏差が１．８以下であって、且つ、ＮａＣｌの濃度が５０ｍｇ／１ｍ3以下で、その変動がプラスマイナス１５％以下のものをいう。また、試験終期の一定値とはＤＯＰの場合は２００ｍｇ、ＮａＣｌの場合は１００ｍｇである。
劣化試験方法としては、緩やかな劣化を与える試験粒子としてＮａＣｌ粒子を、大きな劣化を与える粒子としてＤＯＰ（ジオクチルフタレート）を使用した。試験結果を表１に示す。
【００１１】
【表１】
【発明の効果】
以上述べたように、本発明の使い捨て式防じんマスクは、全体の形状は従来の物と同様に椀状のマスクの輪郭に成形したので小型であり、マスクのメインフィルタろ過材は鼻部を覆う部分を中心としその周辺部に向かって次第に低く段差をもって円筒状の蛇腹状に折り畳んで有効ろ過面積を大きくし、更に、ろ過材部と、接顔部とは別に成形して組み合わせることによりろ過材部のろ過面積を無駄なく使用することができるので各種粒子に合わせろ過材の性能を調整することができ、仕様用途に合わせたマスクを作ることができる。特に、ＤＯＰなどの粒径約０．３μｍの微小粒子に対しても、高性能のろ過材を作ることが可能となる。
【図面の簡単な説明】
【図１】本発明のろ過材の斜視図
【図２】本発明のろ過材の半面平面図
【図３】図２における切断断面図
【図４】本発明の防じんマスクの構成をしめした斜視図
【符号の説明】
１ ろ過材（メインフィルタ） ２ 鼻部を覆う中央部 ３ 折り込み部
４ 外縁部 ５ プレフィルタ ６ サブフィルタ ７ 接顔部
８ しめひも取付具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter medium having a high collection efficiency without increasing ventilation resistance and having a small decrease in collection efficiency, and a disposable dust mask using the filter medium.
[0002]
[Prior art]
The filter material of the replaceable dust mask is generally folded concentrically with a mechanical filter or folded in parallel, and is a flat plate that can be punched out with an electrostatic filter material. And in a disposable dust mask or a simple mask, the type of an electrostatic filter material is common. Disposable dust masks generally have a main filter that collects fine dust, a pre-filter that collects relatively large dust on the outside, and a sub-filter that holds the mask shape on the inside. The filter medium part which consists of these and the filter medium are contacted to the face, and the face part which opened the part corresponding to a nose and a mouth consists of. And the filter material of the main filter is formed into a bowl shape by squeezing after heating, or by joining several flat plates.
The material of the filter medium part used for the main filter generally uses a filter medium obtained by electrifying a nonwoven fabric, but is roughly divided into two according to the principle of collecting dust. One is an electrostatic filter and the other is a mechanical filter. The electrostatic filter attracts and collects dust due to static electricity of the filter medium. However, it is generally said that the collection efficiency is likely to decrease because oil is lost when oil mist or the like is collected. On the other hand, the collecting principle of the mechanical filter is simple only by the shape and arrangement of the filter medium. Therefore, it is generally said that the collecting efficiency is hardly lowered even if oil mist is collected. However, mechanical filters are often dense and often have a high ventilation resistance per unit area compared to electrostatic filters. Therefore, in order to reduce the ventilation resistance, a large filtration area is often required. It was necessary to process in three dimensions.
In addition, as a material for filter media, composite fibers such as glass fibers used as filter media for replaceable dust masks have higher airflow resistance than charged nonwoven fabrics, so glass as a filter material for disposable dust masks. When using composite fibers such as fibers, the effective filtration area must be increased.
[0003]
[Problems to be solved by the invention]
Under such circumstances, as a result of various investigations on filter media and disposable masks that have high collection efficiency while keeping the airflow resistance low while maintaining a small appearance, and less decrease in collection efficiency, the present invention Completed, the object of the present invention is to provide a filtering medium and a disposable mask that secures an effective filtration area without increasing ventilation resistance, has high collection efficiency, and has little reduction in collection efficiency. It is.
[0004]
[Means for Solving the Problems]
The gist of the present invention consists of a non-woven fabric of glass fiber, the central part of the part covering the nose is high, and the outer edge is a line along the contour that covers the mouth from the nose toward the outer edge. It is a disposable dust mask covering material characterized by being gradually folded into a cylindrical bellows shape with a step difference, and the material of the filter material is obtained by papermaking glass fiber. That is, according to the present invention, the central portion of the portion of the main filter filter material covering the nose is high, and the outer edge is a line along the contour covering the mouth from the nose and gradually decreases toward the outer edge. By folding it into a cylindrical bellows with a step, the outer shape and size of the main filter, that is, the projected area can be kept small and small without changing from the conventional disposable mask, and a large effective filtration area can be secured. Has realized a disposable dust mask with high collection efficiency, low resistance and little reduction in collection efficiency.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail.
The filter material for a disposable dust mask according to the present invention (hereinafter sometimes referred to simply as a filter material) has a high central part of the part covering the nose part, and its outer edge part follows a contour that covers the mouth part from the nose part. It is folded into a cylindrical bellows with a step that gradually decreases toward the outer edge of the wire . The filter material used for the filter medium may be a non-woven fabric made of cellulose fiber, synthetic fiber, etc., which is conventionally used for this type of mask, but glass fiber, rayon, pulp, carbon used for replaceable dust masks. It is preferable to use a nonwoven fabric made of fibers or mixed fibers thereof. And the filter material is made of the above-mentioned fiber, with the part covering the nose as the center, and the part covering the mouth as the peripheral part, and providing a step difference toward the part in a bellows shape. It has a folded shape.
FIG. 1 is a perspective view of the filter medium according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view taken along the center line AA. 1-3, the filter medium 1 comprises a
[0006]
The disposable dust mask according to the present invention is also referred to as a so-called simple mask and refers to a mask other than a replaceable dust mask capable of exchanging a filter medium. In the disposable dust mask according to the present invention, the filtration part composed of the pre-filter, the main filter and the sub-filter and the face contact part in contact with the face are integrated, and can be attached with the laces.
The prefilter collects relatively large dust and prevents damage to the main filter. The main filter is a filter that determines the function of the disposable dust mask of the present invention, and uses the above-described filter medium of the present invention. In other words, the central part of the part covering the nose is folded in a bellows shape with a step gradually increasing toward the outer edge (see FIGS. 1 to 3). The sub filter protects the main filter. The face-facing body has an opening at the central part that contacts the nose and mouth, and its peripheral part adheres to the filter part so as to be in close contact with the face. The face contact portion is made of a thermoplastic resin, and is thermally bonded to the outer periphery of the filter portion including the prefilter, the main filter, and the subfilter.
[0007]
The configuration of the disposable dust mask according to the present invention is shown in FIG. The disposable dust mask of the present invention has a main filter 1 using the above-mentioned filter medium as a center, a pre-filter 5 is arranged on the outer side, and a sub-filter 6 is arranged on the inner side to constitute a filter part. Then, the face body 7 is overlapped with the sub filter 6 and the filter part and the face part are bonded together to be integrated with each other, and a lace attachment 8 is provided on the outer periphery thereof.
The filter unit may be composed of a main filter and a pre-filter, omitting the sub-filter depending on the filter material of the main filter.
[0008]
An example of the method for producing the filter medium of the present invention will be described. First, glass fiber is made with a papermaking net and set in a folding machine. The folding machine is a cylindrical molding machine that can be folded in a nested manner. By covering the outer periphery of this folding machine with a nonwoven fabric made of glass fiber or the like, and folding the folding machine in order, the nonwoven fabric made of glass fiber or the like is folded so that the central part is high, and a step is provided toward the outer edge part to form a cylindrical shape. Molded into a bellows shape.
[0009]
【Example】
Example 1
With a filter material made of glass fiber, rayon, pulp, etc., with the main filter shown in FIG. 4 as the center, a polyolefin non-woven fabric and a net pre-filter on the outside, and a non-woven fabric made of polyolefin fiber on the inside Sub-filters are arranged, and these are laminated and integrated.
The resulting disposable dust mask was tested for performance and degradation.
[0010]
The collection performance test method uses dioctyl phthalate (DOP) or sodium chloride (NaCl) as test particles, and the flow of test particle-containing air is 85 l / min into the inside of a dust mask attached to the particle collection efficiency measuring instrument. In the process until the test particles supplied to the filter medium reach a certain value, the concentration of the test particles before and after passing through the dust mask is continuously measured by a test particle concentration measuring device using a scattered light method.
As test particle-containing air, in the case of DOP, the median value of the particle size distribution of the mist of DOP is 0.15 to 0.25 μm, the geometric standard deviation is 1.6 or less, and the concentration of DOP is 100 mg / 1 m. 3 or less and the fluctuation is plus or minus 15% or less. In the case of NaCl, the median value of the particle size distribution of NaCl is 0.06 to 0.1 μm and the geometric standard deviation is 1.8 or less, In addition, the NaCl concentration is 50 mg / 1 m 3 or less, and the fluctuation is plus or minus 15% or less. The constant value at the end of the test is 200 mg for DOP and 100 mg for NaCl.
As the deterioration test method, NaCl particles were used as test particles that gave moderate deterioration, and DOP (dioctyl phthalate) was used as particles that gave large deterioration. The test results are shown in Table 1.
[0011]
[Table 1]
【Effect of the invention】
As described above, the disposable dust mask of the present invention is small because the entire shape is formed into the shape of a bowl-shaped mask like the conventional one, and the main filter filter material of the mask covers the nose. Folding into a cylindrical bellows shape with a step gradually lowering toward the periphery around the part to increase the effective filtration area, and further filtering and combining the filter material part and the face part separately Since the filtration area of the part can be used without waste, the performance of the filter medium can be adjusted according to various particles, and a mask adapted to the specification application can be made. In particular, a high-performance filter medium can be made even for fine particles having a particle diameter of about 0.3 μm such as DOP.
[Brief description of the drawings]
FIG. 1 is a perspective view of a filter medium of the present invention. FIG. 2 is a plan view of a half surface of the filter medium of the present invention. FIG. 3 is a cross-sectional view taken along the line of FIG. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filter material (main filter) 2 Center part which covers nose part 3 Folding part 4
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001085097A JP4927262B2 (en) | 2001-03-23 | 2001-03-23 | Filter medium and disposable dust mask using the filter medium |
| EP20020006551 EP1243291B1 (en) | 2001-03-23 | 2002-03-20 | A filter and a disposable dustproof mask with use of said filter |
| DE2002618238 DE60218238T2 (en) | 2001-03-23 | 2002-03-20 | Filter and dustproof disposable dust mask equipped with such filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001085097A JP4927262B2 (en) | 2001-03-23 | 2001-03-23 | Filter medium and disposable dust mask using the filter medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002282373A JP2002282373A (en) | 2002-10-02 |
| JP4927262B2 true JP4927262B2 (en) | 2012-05-09 |
Family
ID=18940666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001085097A Expired - Fee Related JP4927262B2 (en) | 2001-03-23 | 2001-03-23 | Filter medium and disposable dust mask using the filter medium |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1243291B1 (en) |
| JP (1) | JP4927262B2 (en) |
| DE (1) | DE60218238T2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101876150B1 (en) * | 2017-12-12 | 2018-07-06 | 김영구 | Bellows-type Mask Package |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3742418B2 (en) * | 2003-04-16 | 2006-02-01 | 千鶴子 坂口 | Multi-purpose mask that does not adhere to the nose and mouth |
| FR2903610B1 (en) * | 2006-07-13 | 2009-02-20 | Bacou Dalloz Plaintel Soc Par | INDIVIDUAL RESPIRATORY MASK VISIBLE IN DARKNESS. |
| JP5701538B2 (en) * | 2010-08-24 | 2015-04-15 | 株式会社重松製作所 | Filter for mask, method for manufacturing the same, and mask for collecting particles |
| WO2015066967A1 (en) * | 2013-11-07 | 2015-05-14 | 林净植 | Filtration structure |
| CN106075692A (en) * | 2016-07-29 | 2016-11-09 | 吴江富凯医用卫生用品有限公司 | Flexible adjustable medical respiratory masks |
| KR101941128B1 (en) * | 2017-08-14 | 2019-01-22 | 박휘 | Expanding mask |
| KR102585442B1 (en) * | 2017-11-13 | 2023-10-06 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Inner shell and mask including same |
| CN210301966U (en) * | 2019-04-26 | 2020-04-14 | 深圳市三一进取技术有限公司 | Liner pad |
| CN110064142A (en) * | 2019-05-24 | 2019-07-30 | 中国人民解放军第四军医大学 | A kind of multi-functional three proofings mask |
| KR102233488B1 (en) * | 2020-07-29 | 2021-03-26 | 박찬길 | High efficient mask for easy breathing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE625287A (en) * | ||||
| JPS5226794A (en) * | 1975-08-25 | 1977-02-28 | Bunkai You | Method of producing filter for smoke protective mask |
| SE445299B (en) * | 1984-01-11 | 1986-06-16 | Flodins Filter Ab | RESPIRATORY |
| DE3711505A1 (en) * | 1987-04-04 | 1988-10-20 | Draegerwerk Ag | HALF-MASK-DESIGNED HEPAID FILTER |
| DE9011154U1 (en) * | 1990-07-28 | 1990-10-31 | Bilsom Ab, Billesholm | Particle filtering half mask |
| JP3769674B2 (en) * | 1995-11-30 | 2006-04-26 | 日本バイリーン株式会社 | Electretized mask |
| JP4418906B2 (en) * | 1999-04-02 | 2010-02-24 | 興研株式会社 | Dust mask filter |
-
2001
- 2001-03-23 JP JP2001085097A patent/JP4927262B2/en not_active Expired - Fee Related
-
2002
- 2002-03-20 DE DE2002618238 patent/DE60218238T2/en not_active Expired - Lifetime
- 2002-03-20 EP EP20020006551 patent/EP1243291B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101876150B1 (en) * | 2017-12-12 | 2018-07-06 | 김영구 | Bellows-type Mask Package |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1243291B1 (en) | 2007-02-21 |
| DE60218238D1 (en) | 2007-04-05 |
| JP2002282373A (en) | 2002-10-02 |
| DE60218238T2 (en) | 2008-01-03 |
| EP1243291A1 (en) | 2002-09-25 |
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