JPH0638860B2 - Molding mask - Google Patents
Molding maskInfo
- Publication number
- JPH0638860B2 JPH0638860B2 JP61154311A JP15431186A JPH0638860B2 JP H0638860 B2 JPH0638860 B2 JP H0638860B2 JP 61154311 A JP61154311 A JP 61154311A JP 15431186 A JP15431186 A JP 15431186A JP H0638860 B2 JPH0638860 B2 JP H0638860B2
- Authority
- JP
- Japan
- Prior art keywords
- overlayer
- mask
- collection efficiency
- dust collection
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000465 moulding Methods 0.000 title claims description 25
- 239000000835 fiber Substances 0.000 claims description 57
- 239000000428 dust Substances 0.000 claims description 54
- 229920001410 Microfiber Polymers 0.000 claims description 15
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 description 9
- 239000004743 Polypropylene Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 208000035285 Allergic Seasonal Rhinitis Diseases 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は防塵用、衛生用、花粉症用などに使用される成
形マスクに関する。TECHNICAL FIELD The present invention relates to a molded mask used for dust prevention, hygiene, hay fever, etc.
［従来技術］ 近年、使い捨て用のマスクの分野においても粉塵捕集効
率の高いマスクが望まれており、例えば労働省基準の簡
易防塵マスクではＪＩＳ−Ｔ−8158の6.1の試験法で測
定される粉塵捕集効率が90％以上必要とされている。こ
のため、従来過性能の高いマスクが種々提案されてお
り、例えば特開昭58-124639号公報には、平均直径が数
μｍ（マイクロメータ）の極細繊維からなる過層を中
間層に有する成形マスクが開示されている。[Prior Art] In recent years, even in the field of disposable masks, masks with high dust collection efficiency have been demanded. For example, in the case of a simple dust mask of the Ministry of Labor, dust measured by the test method of JIS-T-8158 6.1. A collection efficiency of 90% or more is required. For this reason, various masks having high overperformance have been proposed in the past. For example, Japanese Patent Laid-Open No. 58-124639 discloses a molding having an overlayer made of ultrafine fibers having an average diameter of several μm (micrometer) as an intermediate layer. A mask is disclosed.
ところが、この極細繊維からなる過層を有するマスク
は高い粉塵捕集効率を持つ反面、目詰りが生じ易くて使
用寿命が短いという欠点があり、また、極細繊維からな
る過層は成形により厚みが潰れて緻密化し易いので安
定生産が難しかった。このため、表面繊維層と裏面繊維
層とを予めマスク形状に成形しておき、この中間に極細
繊維からなる過層を配置したのち、周縁部をシールす
る方法や、表面繊維層と極細繊維からなる過層を重ね
て２つ折りし、円弧状に溶着裁断したものを広げて、予
めマスク形状に成形した裏面繊維層にかぶせ、周縁部を
シールする方法などにより、極細繊維からなる過層に
加熱加圧がかからない様にマスクを生産することが考え
られているが、いずれもその工程が非常に煩雑で、しか
もマスク周縁に沿ってシワが発生し易いという問題があ
った。However, this mask having an overlayer made of ultrafine fibers has a high dust collection efficiency, but on the other hand, it has the drawback of being easily clogged and having a short service life. Stable production was difficult because it was easily crushed and densified. Therefore, the front surface fiber layer and the back surface fiber layer are preliminarily formed into a mask shape, and a superficial layer made of ultrafine fibers is arranged in the middle, and then a peripheral edge is sealed, or from the surface fiber layer and the ultrafine fibers. The overlayers made of ultrafine fibers are heated by overlapping the overlayers, folding them in two, spreading them by cutting them in an arc shape, covering them with a backside fiber layer that has been formed into a mask shape in advance, and sealing the peripheral edge. It has been considered to produce a mask so that pressure is not applied, but all of them have a problem that the process is very complicated, and wrinkles are likely to occur along the periphery of the mask.
一方、目詰りを防ぐために過層を嵩高な状態のままで
高い粉塵捕集効率を得る手段として、過層をエレクト
レット化する手段が考えられるが、この手段は静電気力
による粉塵捕集を行うため、粉塵がたまるとその捕集能
力は低下するので、高い粉塵捕集効率を長期に亘って維
持することが難しく、結局、使用寿命が短いという欠点
を解消することができなかった。On the other hand, as a means to obtain high dust collection efficiency while keeping the overlayer bulky in order to prevent clogging, a means to electretize the overlayer can be considered, but this method collects dust by electrostatic force. However, if dust collects, its collection ability decreases, so it is difficult to maintain high dust collection efficiency for a long period of time, and in the end, it was not possible to eliminate the drawback of a short service life.
［発明の目的］ 本発明は上記従来技術の欠点を解消すべくなされたもの
であり、高い粉塵捕集効率を有しながら、使用寿命が長
く、しかも一体成形可能な成形マスクを提供することを
目的とする。[Object of the Invention] The present invention has been made to solve the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a molding mask that has a high dust collection efficiency, a long service life, and can be integrally molded. To aim.
［発明の構成］ すなわち、本発明は熱接着性繊維を含む表面繊維層と裏
面繊維層との間に極細繊維からなる過層を設けた成形
マスクにおいて、該過層が平均直径４〜10μｍの極細
繊維からなる第１過層と平均直径４μｍ未満の極細繊
維からなる第２過層で構成されており、かつ該第１
過層の粉塵捕集効率が70〜90％であって、第２過層の
粉塵捕集効率が第１過層の粉塵捕集効率より大きいこ
とを特徴とする成形マスクである。[Structure of the Invention] That is, the present invention provides a molding mask in which an overlayer made of ultrafine fibers is provided between a surface fiber layer containing a heat-adhesive fiber and a back fiber layer, and the overlayer has an average diameter of 4 to 10 µm. The first superlayer composed of ultrafine fibers and the second superlayer composed of ultrafine fibers having an average diameter of less than 4 μm, and
The forming mask is characterized in that the dust collecting efficiency of the overlying layer is 70 to 90%, and the dust collecting efficiency of the second overlying layer is higher than the dust collecting efficiency of the first overlying layer.
以下、図面を用いて本発明を説明する。第１図は本発明
の成形マスクの断面図であり、第２図は本発明の成形マ
スクの一例を示す正面図である。The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a shaped mask of the present invention, and FIG. 2 is a front view showing an example of the shaped mask of the present invention.
本発明の成形マスクは極細繊維からなる過層(1)(2)を
有する。この過層(1)(2)には、例えばポリプロピレン
系、ポリエステル系、ポリアミド系などの繊維形成性熱
可塑性樹脂又はこれらの樹脂の混合物を加熱されたノズ
ルのオリィフィスを通して溶融状態で熱ガス流中に押し
出して、溶融樹脂を繊維に細化して繊維流を形成し、繊
維を繊維流の通路中の捕集装置上で捕集する、いわゆる
メルトブロー法による極細繊維不織布などが使用され
る。The formed mask of the present invention has superlayers (1) and (2) made of ultrafine fibers. The overlayers (1) and (2) are, for example, polypropylene-based, polyester-based, polyamide-based, or other fiber-forming thermoplastic resins or a mixture of these resins in a hot gas flow in a molten state through an orifice of a heated nozzle. An ultrafine fiber non-woven fabric by a so-called melt blow method, which is extruded to thin the molten resin into fibers to form a fiber stream and collects the fibers on a trapping device in a passage of the fiber stream, is used.
このうち、第１過層(1)は平均直径４〜10μｍの微細
繊維から構成され、その粉塵捕集効率が70〜90％となる
ように目付、厚みなどが調整される。この第１過層
(1)は目詰りが生じない範囲で、微細な塵の大部分を捕
集する働きをするとともに、成形の際に過層、とくに
第２過層(2)の緻密化が進みすぎないための緩衝層と
して働く。従って、緻密化を妨げるため及び粉塵捕集効
率を90％以下とするために、微細繊維の平均直径は少な
くとも４μｍ以上でなければならないが、あまり太い繊
維になると微細な塵を捕集する能力が低下するので平均
直径は10μｍを越えてはならない。また、第１過層
(1)の粉塵捕集効率が70〜90％でなければならないの
は、90％を越えるとこの層で目詰りが著しく生じ易くな
り、一方70％未満であると、この層では目詰りを生じな
いが、この層を通過する微細な塵の量が増えるため、第
２過層において目詰りが生じ易くなるからである。Of these, the first overlayer (1) is composed of fine fibers having an average diameter of 4 to 10 μm, and the basis weight, thickness, etc. are adjusted so that the dust collection efficiency is 70 to 90%. This first overlayer
(1) collects most of the fine dust within the range where clogging does not occur, and because the overlayer, especially the second overlayer (2) does not become too dense during molding. Acts as a buffer layer. Therefore, the average diameter of the fine fibers must be at least 4 μm or more in order to prevent densification and the dust collection efficiency to be 90% or less, but if the fibers are too thick, the ability to collect fine dust is The average diameter should not exceed 10 μm as it decreases. Also, the first overlayer
The dust collection efficiency of (1) must be 70 to 90% because if it exceeds 90%, clogging tends to occur significantly in this layer, and if it is less than 70%, clogging in this layer occurs. Although it does not occur, since the amount of fine dust passing through this layer increases, clogging easily occurs in the second overlayer.
これに対して第２過層(2)は平均直径４μｍ未満の微
細繊維から構成されその粉塵捕集効率は第１過層(1)
より大きくなるように調整される。この第２過層(2)
は第１過層(1)を通過した微細な塵を捕集し、マスク
全体としての粉塵捕集効率を高める働きをする。従っ
て、この層(2)の粉塵捕集効率は第１過層(1)より高く
なければならず、通常90％以上となるように調整され
る。On the other hand, the second overlayer (2) is composed of fine fibers with an average diameter of less than 4 μm, and its dust collection efficiency is
Adjusted to be larger. This second overrise (2)
Serves to collect the fine dust that has passed through the first overlayer (1) and enhance the dust collection efficiency of the entire mask. Therefore, the dust collection efficiency of this layer (2) must be higher than that of the first overlayer (1), and is usually adjusted to 90% or more.
上記過層(1)(2)には、必要に応じてエレクトレット化
を施してもよく、この様な処理を行うと静電気力による
粉塵の捕集能力が加わるので、より空隙率の高い目詰り
の生じにくい状態で、高い粉塵捕集能力を得ることがで
きるようになる。The above overlayers (1) and (2) may be electretized if necessary, and if such treatment is performed, the dust collection capability due to electrostatic force is added, so clogging with a higher porosity It becomes possible to obtain a high dust collecting ability in a state in which the dust does not easily occur.
また、特に過層(1)(2)に前述したメルトブロー法によ
る微細繊維不織布を用いる場合、紡糸時の樹脂の溶融粘
度を50ポイズ以下と低くする、熱ガス流による延伸を強
くかけず、繊維に延伸の余地を残しておく、あるいはノ
ズルから捕集装置までの距離を30cm以上とり、繊維間の
絡みを増加させるなどの手段により成形性を高めれば一
体成形が容易に行える。Further, particularly when using the fine fiber nonwoven fabric by the melt blow method described above in the overlayer (1) (2), to reduce the melt viscosity of the resin at the time of spinning to 50 poise or less, do not strongly stretch by hot gas flow, fiber If there is room for stretching, or if the distance from the nozzle to the collecting device is 30 cm or more and the entanglement between the fibers is increased to improve the formability, the integral molding can be easily performed.
上述の如く構成された第１過層(1)と第２過層(2)と
の初期吸気抵抗値の比は１：1.5〜１：４となることが
望ましく、両者の値がこれより近いと粉塵捕集効率を低
下させずに使用寿命を延ばすという効果はあまり期待で
きず、これより両者の値が離れると、特に第２過層で
の目詰りが生じ易くなり、使用寿命が短くなる。特に好
ましい、初期吸気抵抗値の比は１：２〜１：３である。It is desirable that the ratio of the initial intake resistance values of the first overlayer (1) and the second overlayer (2) configured as described above be 1: 1.5 to 1: 4, and both values are closer to each other. The effect of extending the service life without lowering the dust collection efficiency can not be expected so much, and if the values deviate from this value, clogging especially in the second overlayer is likely to occur and the service life will be shortened. . A particularly preferable ratio of the initial intake resistance value is 1: 2 to 1: 3.
本発明の成形マスクは、上記の過層(1)(2)を表面繊維
層(3)と裏面繊維層(4)とに挟まれた積層構造となってい
る。The molded mask of the present invention has a laminated structure in which the above overlayers (1) and (2) are sandwiched between the front surface fiber layer (3) and the back surface fiber layer (4).
表面繊維層(3)は過層(1)(2)の上流側に設けられ、吸
気中に含まれる粗大な塵を捕集するプレフィルターとし
ての役割と、成形マスク形状を保持する役割を果たして
おり、一方、裏面繊維層(4)は過層(1)(2)の下流側、
すなわち顔面側に設けられ、主にマスク形状の保持のた
めに使用される。従って、この表面繊維層(3)(4)には成
形性を持たせ、かつ各層間を結合するために熱接着性繊
維が50〜100％含まれていた方がよい。この熱接着性繊
維としては、同時に配合される繊維より少なくとも融点
が20℃以上低い成分を含む、ポリエチレン系、ポリプロ
ピレン系、ポリアミド系、ポリエステル系、エチレン酢
酸ビニル系などの樹脂からなる繊維、もしくは融点の異
なる成分からなる複合繊維などが好適に用いられる。ま
た、表裏面繊維層(3)(4)はその吸気抵抗が低い方がよ
く、両層を合わせた初期吸気抵抗値が1.0mmH2O以下の範
囲にあることが望ましい。なお、表裏面繊維層(3)(4)に
は不織布、フェルトなどの過作用があり比較的嵩高な
素材が好適に用いられるが、この他、織物、編物、ネッ
トなどを用いてもよく、あるいは、これらを組合わせて
積層した構造としてもよい。更にこれらの層(3)(4)に活
性炭などの吸着物質を保持させたり、抗菌剤を付着させ
たりすることにより脱臭、殺菌、有害物質の捕集といっ
た機能を付加させてもよい。上記の表裏面繊維層(3)(4)
には、各層の強度や各層間の結合力を高めるため、マス
クの保形性を高めるため、あるいは吸着物質を保持する
ために、通気性を阻害しない範囲で、樹脂を付着させて
もよい。The surface fiber layer (3) is provided on the upstream side of the overlayers (1) and (2) and plays a role as a prefilter for collecting coarse dust contained in the intake air and a role for maintaining the shape of the molding mask. On the other hand, the back fiber layer (4) is on the downstream side of the overlayers (1) and (2),
That is, it is provided on the face side and is mainly used for holding the mask shape. Therefore, it is preferable that the surface fiber layers (3) and (4) have moldability and contain 50 to 100% of heat-adhesive fibers to bond the layers. As the heat-adhesive fiber, a fiber made of a resin such as a polyethylene-based, polypropylene-based, polyamide-based, polyester-based or ethylene vinyl acetate-based resin, which contains at least a component having a melting point of 20 ° C. or more lower than that of the fibers mixed at the same time, or a melting point Composite fibers composed of different components are preferably used. Further, the front and back fiber layers (3) and (4) preferably have a low intake resistance, and the initial intake resistance value of both layers combined is preferably within a range of 1.0 mmH 2 O or less. The front and back fiber layers (3) and (4) are preferably made of a non-woven fabric, a relatively bulky material such as felt having an excessive action, but other than this, woven fabric, knitted fabric, net, etc. may be used. Alternatively, a structure in which these are combined and laminated may be used. Further, these layers (3) and (4) may be provided with functions such as deodorization, sterilization, and collection of harmful substances by holding an adsorbing substance such as activated carbon or attaching an antibacterial agent. Front and back fiber layers (3) (4) above
In order to increase the strength of each layer and the bonding force between the layers, to improve the shape retention of the mask, or to hold the adsorbed substance, a resin may be attached within a range that does not impair the air permeability.
本発明の成形マスクは、表面繊維層(3)、第１過層
(1)、第２過層(2)、裏面繊維層(4)の順に積層され金
型などにより熱成形される。この場合、積層した基材を
予め金型でプレスし、プレスしたまま金型を冷却する方
法がとくに好ましく、過層の緻密化が進みにくい。こ
の成形時においては、第２過層(2)より太い繊維で構
成される第１過層(1)の緩衝作用により、過層の緻
密化をある程度防止できるので成形条件の若干の変化に
は追従でき、一体成形による安定生産を可能なものにし
ている。しかし、更に成形時に過層(3)(4)に圧力を伝
える表面繊維層(3)のマスク形状への変形性を容易にす
れば、この圧力が減少し過層の潰れは生じにくくなる
ので、表面繊維層(3)は成形温度付近での40％モジュラ
スが低いことが望ましく、140℃における40％モジュラ
スが1.0kg/5cm幅以下であるのがよい。また、このマス
クの成形時、あるいは成形後にマスクの周縁部に熱圧
着、超音波溶着などの手段により、シール部または部分
的なシール部を形成してもよく、この様な処理を施せ
ば、マスク周縁部からの層間剥離が防止できる。The molded mask of the present invention comprises a surface fiber layer (3) and a first overlayer.
(1), the second overlayer (2) and the back fiber layer (4) are laminated in this order and thermoformed by a mold or the like. In this case, it is particularly preferable to press the laminated base material with a mold in advance and cool the mold while it is pressed, and it is difficult for the overlayer to be densified. During this molding, the buffering action of the first overlayer (1) made of fibers thicker than that of the second overlayer (2) can prevent the overlayer from being densified to some extent. It is possible to follow up, and stable production is possible by integral molding. However, if the surface fiber layer (3) that transmits pressure to the overlayer (3) (4) at the time of molding is made more deformable into a mask shape, this pressure is reduced and the overlayer is less likely to be crushed. The surface fiber layer (3) preferably has a low 40% modulus near the molding temperature, and the 40% modulus at 140 ° C. is preferably 1.0 kg / 5 cm width or less. Further, at the time of molding the mask, or after the molding, the seal portion or the partial seal portion may be formed on the peripheral portion of the mask by means of thermocompression bonding, ultrasonic welding, or the like. It is possible to prevent delamination from the peripheral portion of the mask.
本発明のマスクは、上述のごとく作成された後、所望に
より顔面とマスクとのスキ間からの空気洩れを防止する
クッション材（図示せず）、鼻の形状にマスクを沿わせ
るための鼻金(5)、マスク装着用の紐(6)、などが取り付
けられるが、特に空気洩れ防止用のクッション材には顔
面への沿いがよく、ソフトで通気性のない部材を用いる
ことが好ましく、例えば、独立気泡の発泡塩化ビニル樹
脂などの発泡倍率５倍以上のソフトなスポンジが使用さ
れる。After the mask of the present invention is produced as described above, a cushioning material (not shown) for preventing air leakage from the gap between the face and the mask, if desired, and a nose wire for fitting the mask in the shape of the nose (5), a string for wearing a mask (6), etc. are attached, but it is preferable to use a member that is soft and non-breathable, especially as a cushioning material for preventing air leakage, that fits well to the face. A soft sponge with a foaming ratio of 5 times or more, such as closed-cell foamed vinyl chloride resin, is used.
なお、本発明において成形マスク及び各過層の粉塵捕
集効率、初期吸気抵抗値、吸気抵抗上昇値は以下に示す
試験法により測定される。In the present invention, the dust collection efficiency, the initial intake resistance value, and the intake resistance increase value of the molding mask and each overlayer are measured by the following test methods.
（粉塵捕集効率） ＪＩＳ−Ｔ−8158 6.1に準じ、試験用面型に装着し、周
囲を密閉したマスクに、石英粉塵含有空気（石英粉塵の
粒子の大きさが２μｍ以下であって、かつ、濃度が30±
５mg/cm2のものをいう。）を30／分の流量で通じ、そ
の２分後からの１分間、通過前及び通過後の石英粉塵濃
度を散乱光方式による粉塵測定器により測定し、次式に
よって粉塵捕集効率を算出した。(Dust collection efficiency) In accordance with JIS-T-8158 6.1, a mask equipped with a test surface mold and having a hermetically sealed periphery was filled with quartz dust-containing air (the size of particles of quartz dust was 2 μm or less, and , The concentration is 30 ±
It means 5 mg / cm 2 . ) At a flow rate of 30 / min, and after 2 minutes, for 1 minute, the quartz dust concentration before and after passage was measured by a dust measuring instrument using a scattered light method, and the dust collection efficiency was calculated by the following formula. .
Ｅ＝{(Co-Ci)/Co}×100 （ただし、Ｅ：捕集効率（％）、Co：通過前の石英粉塵
の濃度（mg/m2）、Ci：通過後の石英粉塵の濃度（mg/
m2）である。）なお、過層の粉塵捕集効率には、測定
しようとする過層を表裏面繊維層の間に配したマスク
を、上記試験法により測定した値を用いた。これは、本
発明に用いられる過層が、表裏面繊維層に比して粉塵
捕集への寄与がはるかに大きいため、表裏面繊維層での
粉塵捕集を無視できるものとして取り扱ったことによ
る。E = {(Co-Ci) / Co} × 100 (E: collection efficiency (%), Co: concentration of quartz dust before passage (mg / m 2 ), Ci: concentration of quartz dust after passage (Mg /
m 2 ). Note that, for the dust collection efficiency of the overlayer, the value measured by the above-mentioned test method for the mask in which the overlayer to be measured is placed between the front and back fiber layers was used. This is because the overlayer used in the present invention has a much larger contribution to dust collection as compared to the front and back fiber layers, and therefore, it was treated as dust that can be ignored in the front and back fiber layers. .
（初期吸気抵抗値） ＪＩＳ−Ｔ−8158 6.2に準じ、試験用面型に装着し、周
囲を密閉したマスクに空気を40／分の流量で通じ、１
分後のマスクの内外の圧力差を測定し、初期吸気抵抗値
とする。(Initial intake resistance value) According to JIS-T-8158 6.2, air is passed through a mask, which is mounted on a test surface mold and has a closed periphery, at a flow rate of 40 / min.
The pressure difference between the inside and outside of the mask after a minute is measured and used as the initial inspiratory resistance.
なお、過層の初期吸気抵抗値には、測定しようとする
過層を表裏面繊維層の間に配したマスクの初期吸気抵
抗値から、表裏面繊維層のみからなるマスクの初期吸気
抵抗値を引いた値を用いる。The initial intake resistance value of the overlayer is calculated from the initial intake resistance value of the mask in which the overlayer to be measured is placed between the front and back fiber layers, and the initial intake resistance value of the mask including only the front and back fiber layers. Use the subtracted value.
（吸気抵抗上昇値） ＪＩＳ−Ｔ−8158 6.3に準じ、試験用面型に装着し、周
囲を密閉したマスクに石英粉塵が100mg供給されるま
で、石英粉塵含有空気を40／分の流量で通じ、このと
きのマスク内外の圧力差を測定し、吸気抵抗上昇値とす
る。(Intake resistance increase value) In accordance with JIS-T-8158 6.3, the quartz dust-containing air was passed at a flow rate of 40 / min until 100 mg of quartz dust was supplied to the mask that was mounted on the test surface mold and had its periphery sealed. At this time, the pressure difference between the inside and outside of the mask is measured and used as the intake resistance increase value.
なお、過層の吸気抵抗上昇値には、初期吸気抵抗値の
場合と同様に、測定しようとする過層を表裏面繊維層
の間に配したマスクの吸気抵抗上昇値から、表裏面繊維
層のみからなるマスクの吸気抵抗上昇値を引いた値を用
いる。In addition, as in the case of the initial intake resistance value, the intake resistance increase value of the overlayer is calculated from the intake resistance increase value of the mask in which the overlayer to be measured is arranged between the front and back fiber layers. The value obtained by subtracting the intake resistance increase value of the mask consisting of only is used.
（実施例１） 繊度３デニールのエチレン酢酸ビニル−ポリプロピレン
系複合繊維50重量％と繊度３デニールのポリエステル繊
維50重量％とからなる目付80g/m2、厚さ3.4mmの不織布
（140℃における40％モジュラス0.5kg/5cm幅）の表面繊
維層と、繊度３デニールのポリエチレン−ポリプロピレ
ン系複合繊維70重量％と繊度２デニールのポリプロピレ
ン繊維30重量％とからなる目付170g/m2、厚さ1.8mmの不
織布の裏面繊維層との間に、メルトブロー法により作成
された平均直径５μｍのエレクトレット化されたポリプ
ロピレン繊維不織布（目付40g/m2）の第１過層と、平
均直径２μｍのエレクトレット化されたポリプロピレン
繊維不織布（目付40g/m2）の第２過層とを配して積層
する。(Example 1) Nonwoven fabric having a weight per unit area of 80 g / m 2 and a thickness of 3.4 mm (50% at 40 ° C.) composed of 50% by weight of an ethylene vinyl acetate-polypropylene composite fiber having a fineness of 3 denier and 50% by weight of polyester fiber having a fineness of 3 denier % Modulus 0.5kg / 5cm width), surface weight fiber layer 70g% of polyethylene-polypropylene composite fiber of 3 denier fineness and polypropylene fiber of fineness 2 denier 170g / m 2 , thickness 1.8mm The first overlayer of electretized polypropylene fiber non-woven fabric (weight per unit area: 40 g / m 2 ) having an average diameter of 5 μm created by the melt-blowing method and the back surface fiber layer of the non-woven fabric of No. A second overlayer of polypropylene fiber non-woven fabric (area weight 40 g / m 2 ) is arranged and laminated.
次いで、この積層体を140℃に加熱した金型によりプレ
スし、そのまま冷却して成形を施した後、周縁部に超音
波溶着により不連続な線状の部分的なシール部を設けて
成形マスクを作成した。Next, this laminated body is pressed by a mold heated to 140 ° C., cooled as it is, and molded, and then a discontinuous linear partial seal portion is provided on the peripheral portion by ultrasonic welding to form a molding mask. It was created.
上記、成形マスク及び過層の粉塵捕集効率、初期吸気
抵抗値、吸気抵抗上昇値を測定して第１表に示した。The dust collecting efficiency, the initial intake resistance value, and the intake resistance increase value of the molding mask and the overlayer are measured and shown in Table 1.
（実施例２） メルトブロー法により作成された平均直径７μｍのポリ
プロピレン不織布（目付40g/m2）をエレクトレット化
し、粉塵捕集効率を74.8％にした第１過層を用いたこ
と以外は実施例１と同様にして成形マスクを作成した。
この成形マスクの粉塵捕集効率、初期吸気抵抗値、吸気
抵抗上昇値を測定し第１表に示した。(Example 2) Example 1 except that a polypropylene non-woven fabric having an average diameter of 7 µm (unit weight: 40 g / m 2 ) prepared by the melt-blowing method was electretized and a first overlayer having a dust collection efficiency of 74.8% was used. A molding mask was prepared in the same manner as in.
The dust collection efficiency, the initial intake resistance value, and the intake resistance increase value of this molding mask were measured and shown in Table 1.
（実施例３） メルトブロー法により作成された平均直径５μｍのポリ
プロピレン不織布（目付80g/m2）をエレクトレット化
し、粉塵捕集効率を86.4％にした第１過層を用いたこ
と以外は実施例１と同様にして成形マスクを作成した。
この成形マスクの粉塵捕集効率、初期吸気抵抗値、吸気
抵抗上昇値を測定し第１表に示した。(Example 3) Example 1 except that a polypropylene non-woven fabric having an average diameter of 5 µm (weight per unit area: 80 g / m 2 ) prepared by the melt-blowing method was electretized and a first overlayer having a dust collection efficiency of 86.4% was used. A molding mask was prepared in the same manner as in.
The dust collection efficiency, the initial intake resistance value, and the intake resistance increase value of this molding mask were measured and shown in Table 1.
前表から明らかなように、実施例１〜３のマスクは、も
し単独で用いると吸気抵抗上昇値が20.4mmH2Oとなり目
詰りが生じ易い第２過層を用いていながら、これを粉
塵捕集効率が81.9％、74.8％、86.4％の第２過層より
粉塵捕集効率が低い第１過層と組合せることにより、
吸気抵抗上昇値を8.2mmH2O、7.8mmH2O、8.7mmH2Oと低く
することができ、しかも粉塵捕集効率を98％を越える非
常に高効率のものとしている。すなわち、従来のマスク
はこの第２過層のみから作られたマスクに相当し、粉
塵捕集効率が92％程度でも、その吸気抵抗上昇値は20.7
mmH2O（第２過層＋表裏面繊維層）と高く、その使用
寿命は極めて短かったが、本実施例のマスクでは98％を
越える粉塵捕集効率を有するうえに、その使用寿命は従
来のものの２倍以上にも及ぶのである。 As is clear from the previous table, the masks of Examples 1 to 3 have an intake air resistance increase value of 20.4 mmH 2 O when used alone, and use the second overlayer which is apt to cause clogging, and By combining with the first overlayer, which has a lower dust collection efficiency than the second overlayer, which has a collection efficiency of 81.9%, 74.8%, 86.4%,
The intake resistance rise value can be lowered to 8.2mmH 2 O, 7.8mmH 2 O, and 8.7mmH 2 O, and the dust collection efficiency is extremely high, exceeding 98%. That is, the conventional mask is equivalent to a mask made only from this second overlayer, and even if the dust collection efficiency is about 92%, the intake resistance increase value is 20.7.
mmH 2 O (second overlayer + front and back surface fiber layers) was high, and its service life was extremely short, but the mask of this example has a dust collection efficiency of over 98% and its service life is conventional. It is more than double that of
なお、実施例１〜３をみると、第１過層に高い粉塵捕
集効率を用いるほど、全体の粉塵捕集効率はあがるが、
逆に吸気抵抗上昇値もあがるため使用寿命は短くなる傾
向があることがわかる。As seen from Examples 1 to 3, the higher the dust collection efficiency in the first overlayer, the higher the dust collection efficiency as a whole,
On the contrary, it can be seen that the service life tends to be shortened because the intake resistance increase value also increases.
［発明の効果］ 以上述べた様に、本発明の成形マスクはその過層が平
均直径４〜10μｍの極細繊維からなり、粉塵捕集効率が
70〜90％である第１過層と、平均直径４μｍ未満の極
細繊維からなり、粉塵捕集効率が第１過層より大きい
第２過層とからなるので、非常に高い粉塵捕集効率が
得られるうえに、その高い粉塵捕集効率を維持しながら
使用寿命を飛躍的に延ばすことができる。しかも、成形
の際に第１過層が緩衝層として働くために、過層が
潰れて緻密化しすぎることがないので、過層と表裏面
層を一体に成形でき、生産性にも優れている。[Effects of the Invention] As described above, in the formed mask of the present invention, the overlayer is made of ultrafine fibers having an average diameter of 4 to 10 µm, and the dust collection efficiency is high.
Since it consists of 70-90% of the first overlayer, and ultrafine fibers with an average diameter of less than 4 μm, and a second overlayer having a dust collection efficiency higher than the first overlayer, a very high dust collection efficiency is achieved. In addition to being obtained, the service life can be remarkably extended while maintaining the high dust collection efficiency. Moreover, since the first overlayer acts as a buffer layer during molding, the overlayer does not crush and become too dense, so that the overlayer and the front and back layers can be integrally molded, and the productivity is excellent. .
この様に本発明の成形マスクは簡単に製造でき、しかも
優れた過性能を長期に亘って発揮することができるの
で、防塵用、衛生用、花粉症用などのマスクとして好適
に使用できるものである。As described above, the molded mask of the present invention can be easily manufactured, and can exhibit excellent overperformance for a long period of time, so that it can be suitably used as a mask for dust prevention, hygiene, hay fever, etc. is there.
第１図は本発明のマスクの断面図であり、第２図は本発
明のマスクの一例を示す正面図である。 １…第１過層、２…第２過層 ３…表面繊維層、４…裏面繊維層FIG. 1 is a sectional view of the mask of the present invention, and FIG. 2 is a front view showing an example of the mask of the present invention. DESCRIPTION OF SYMBOLS 1 ... 1st overlayer, 2 ... 2nd overlayer 3 ... Surface fiber layer, 4 ... Back surface fiber layer
Claims (4)
層との間に極細繊維からなる過層を設けた成形マスク
において、該過層が平均直径４〜10μｍの極細繊維か
らなる第１過層と平均直径４μｍ未満の極細繊維から
なる第２過層で構成されており、かつ該第１過層の
粉塵捕集効率が70〜90％であって、第２過層の粉塵捕
集効率が第１過層の粉塵捕集効率より大きいことを特
徴とする成形マスク。1. A molding mask in which an overlayer made of ultrafine fibers is provided between a surface fiber layer containing heat-adhesive fibers and a backside fiber layer, wherein the overlayer is made of ultrafine fibers having an average diameter of 4 to 10 μm. The first overlayer is composed of a second overlayer composed of ultrafine fibers having an average diameter of less than 4 μm, and the dust collection efficiency of the first overlayer is 70 to 90%, and the dust collection of the second overlayer is performed. A forming mask having a collection efficiency higher than the dust collection efficiency of the first overlayer.
の比が１：1.5〜１：４である特許請求の範囲第１項記
載の成形マスク。2. The molding mask according to claim 1, wherein the ratio of the initial intake resistance between the first overlayer and the second overlayer is 1: 1.5 to 1: 4.
レクトレット化されている特許請求の範囲第１項または
第２項記載の成形マスク。3. The molding mask according to claim 1 or 2, wherein the first overlayer and / or the second overlayer is electretized.
ラスが1.0kg/5cm幅以下の不織布からなる特許請求の範
囲第１項ないし第３項のいずれかに記載の成形マスク。4. The molding mask according to claim 1, wherein the surface fiber layer is made of a non-woven fabric having a 40% modulus at 140 ° C. of 1.0 kg / 5 cm width or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61154311A JPH0638860B2 (en) | 1986-06-30 | 1986-06-30 | Molding mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61154311A JPH0638860B2 (en) | 1986-06-30 | 1986-06-30 | Molding mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS639455A JPS639455A (en) | 1988-01-16 |
| JPH0638860B2 true JPH0638860B2 (en) | 1994-05-25 |
Family
ID=15581340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61154311A Expired - Fee Related JPH0638860B2 (en) | 1986-06-30 | 1986-06-30 | Molding mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638860B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5194596A (en) * | 1989-07-27 | 1993-03-16 | California Biotechnology Inc. | Production of vascular endothelial cell growth factor |
| TWI240906B (en) * | 2003-04-09 | 2005-10-01 | Ind Tech Res Inst | Driving method of transflective liquid-crystal display device |
| MY154880A (en) * | 2007-06-26 | 2015-08-14 | Filligent Ltd | Devices and methods for decreasing human pathogen transmission |
| JP2012161475A (en) * | 2011-02-07 | 2012-08-30 | Midori Anzen Co Ltd | Mask |
-
1986
- 1986-06-30 JP JP61154311A patent/JPH0638860B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS639455A (en) | 1988-01-16 |
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