JP2705554B2 - Flame-retardant filter medium and manufacturing method - Google Patents
Flame-retardant filter medium and manufacturing methodInfo
- Publication number
- JP2705554B2 JP2705554B2 JP5335478A JP33547893A JP2705554B2 JP 2705554 B2 JP2705554 B2 JP 2705554B2 JP 5335478 A JP5335478 A JP 5335478A JP 33547893 A JP33547893 A JP 33547893A JP 2705554 B2 JP2705554 B2 JP 2705554B2
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- Prior art keywords
- flame
- retardant
- filter medium
- flame retardant
- heat
- Prior art date
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、難燃性濾材および
その製造方法に関し、通気性に優れた難燃性濾材として
空調用濾材あるいは柔軟不織布の難燃化支持材などとし
て好適に利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant filter medium and a method for producing the same, and is suitably used as an air-conditioning filter medium or a flame-retardant support of a flexible nonwoven fabric as a flame-retardant filter medium having excellent air permeability. .
【０００２】[0002]
【従来技術】従来より難燃性濾材を得る方法には、特開
昭５１−１３４４７５号公報、特開昭５４−８３１８１
号公報などに開示されているように、非難燃性の不織布
を難燃剤とエマルジョン樹脂（バインダー）溶液に含浸
後、乾燥して不織布に硬い樹脂とともに難燃剤を付着さ
せる方法で難燃性と繊維間固定を図る方法や特開昭５５
−１１１８１６号公報に開示されているように、難燃性
の繊維構造体をバインダーで固定することで剛性の高い
難燃性濾材とする方法などが知られている。2. Description of the Related Art Conventionally, methods for obtaining a flame-retardant filter medium are disclosed in JP-A-51-134475 and JP-A-54-83181.
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10 (1995), a method of impregnating a non-flame-retardant non-woven fabric with a flame retardant and an emulsion resin (binder) solution, drying the non-flame-retardant non-woven fabric, and attaching the flame retardant together with the hard resin to the non-woven fabric is used as a flame retardant and fiber. The method of fixing the gap and the method disclosed in
As disclosed in JP-A-111816, a method of fixing a flame-retardant fibrous structure with a binder to obtain a highly rigid flame-retardant filter medium is known.
【０００３】[0003]
【発明が解決しようとする課題】これらの従来技術は、
難燃剤を繊維に接着するために樹脂（バインダー）が必
要であり、また難燃性繊維を用いる場合でも繊維間接着
を目的としてバインダーを必要とするなどバインダーが
不可欠な技術内容のものであった。そのためこれらのバ
インダーが繊維間の隙間を塞ぎ、濾材として用いた場
合、通気性を落とすという欠点があった。従って、従来
技術では難燃性を有する低圧損濾材を得ることは困難で
あった。SUMMARY OF THE INVENTION These prior arts are:
A resin (binder) is required to bond the flame retardant to the fiber, and even when flame-retardant fibers are used, the binder is indispensable technical content, such as requiring a binder for inter-fiber bonding. . If that for these binders block the gaps between the fibers, it was used as a filter medium
In this case , there is a drawback that air permeability is reduced. Therefore, it has been difficult to obtain a low pressure drop filter medium having flame retardancy by the conventional technology.
【０００４】本発明は、かかる従来技術の欠点を解消と
しようとするものであり、低圧損で、しかも優れた難燃
性を有する濾材およびその製造方法を提供することを目
的とする。An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and has a low pressure loss and excellent flame retardancy.
And an object that you provide filter media and a manufacturing method thereof sex.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的を達
成するため次の構成を有する。The present invention has the following arrangement to achieve the above object.
【０００６】「(1) 少なくとも一部が、低融点成分と高
融点成分とが複合された熱接着性繊維によって繊維間接
着された不織布に、難燃剤が用いられてなる難燃性濾材
において、該難燃剤は、一部の難燃剤が熱接着性繊維の
内部に染み込んでいるとともに、染み込まなかった難燃
剤は熱接着性繊維の表面にとどまっていることを特徴と
する難燃性濾材。[0006] "(1) At least a part is composed of a low melting point component and a high melting point component.
In a flame-retardant filter medium in which a flame retardant is used in a nonwoven fabric bonded between fibers by a heat-adhesive fiber composited with a melting point component , a part of the flame retardant is a heat-adhesive fiber.
Flame retardant that penetrates into the interior and does not penetrate
A flame-retardant filter medium characterized in that the agent stays on the surface of the heat-adhesive fiber .
【０００７】(2) 低融点成分と、高融点成分とを含む熱
接着性繊維を用いた不織布に、難燃剤が分散または溶解
された水溶液を付着後、該低融点成分の融点以上の温度
で熱処理することにより、該難燃剤の一部を熱接着性繊
維の内部に染み込ませるとともに、染み込まなかった難
燃剤を熱接着性繊維の表面にとどまらせて、繊維間接着
を行うことを特徴とする難燃性濾材の製造方法。」本発
明の難燃性濾材は、難燃性はもちろんのこと、特に低圧
損性と寿命特性および低コスト性に優れたものである。
これらの効果は、バインダーを用いることなく難燃化と
繊維間固定を行ったことによって始めて得られたもので
ある。(2) After adhering an aqueous solution in which a flame retardant is dispersed or dissolved to a nonwoven fabric using a heat-adhesive fiber containing a low-melting component and a high-melting component, the non-woven fabric is heated at a temperature equal to or higher than the melting point of the low-melting component. By performing the heat treatment, a part of the flame retardant is impregnated into the interior of the thermo-adhesive fiber , and
A method for producing a flame-retardant filter medium, characterized in that a flame retardant is left on the surface of a heat-adhesive fiber to perform inter-fiber adhesion. The flame-retardant filter medium of the present invention is excellent not only in flame retardancy but also in particularly low pressure drop, life characteristics and low cost.
These effects are obtained only by performing flame retardation and fixing between fibers without using a binder.
【０００８】本発明の不織布は、熱接着性繊維を少なく
ともその一成分として含み、かつ、一部の難燃剤が熱接
着性繊維の内部に染み込んでいるとともに（吸塵）、染
み込まなかった難燃剤が熱接着性繊維の表面にとどまっ
た状態でその熱接着性繊維の少なくとも一部が、繊維間
接着されていることが必要である。[0008] The nonwoven fabric of the present invention contains a heat-adhesive fiber as at least one component thereof, and a part of the flame retardant is thermally bonded.
While penetrating inside the adhesive fiber (dust absorption),
Flame retardant not incorporated stays on the surface of the thermo-adhesive fiber
In this state, it is necessary that at least a part of the heat-adhesive fibers be bonded to each other.
【０００９】不織布の構成は熱接着性繊維を１００％用
いることが剛性向上のために好ましいが、さらに難燃性
向上のためにモダクリル繊維やポリクラール繊維などの
難燃性繊維を混合したり、また、捕集効率向上のための
極細繊維、あるいは、抗菌・抗カビ、脱臭、親水性能を
有する繊維や、通常の熱接着性繊維でない繊維が混合さ
れていてもよい。また、後加工によって、抗菌、抗カ
ビ、脱臭性を持たせた不織布であってもよい。It is preferable to use 100% of the heat-adhesive fiber in the structure of the nonwoven fabric in order to improve the rigidity. However, in order to further improve the flame retardancy, flame retardant fibers such as modacrylic fiber and polyclar fiber are mixed. Ultrafine fibers for improving collection efficiency, fibers having antibacterial / antifungal, deodorizing and hydrophilic properties, and fibers which are not ordinary heat-adhesive fibers may be mixed. Further, a nonwoven fabric having antibacterial, antifungal and deodorizing properties by post-processing may be used.
【００１０】さらに、上記熱接着性繊維は低融点成分と
高融点成分とが複合されてなるが、かかる低融点成分と
しては、融点７０℃以上、１５０℃以下のものが好まし
く用いられ、例えば、ポリエステル系で芯鞘構造の東レ
（株）“サフメット”（１１０℃）、鐘紡（株）製“ベ
ルコンビ”（１１０〜１３０℃）などが好ましい。ま
た、ポリオレフィン系で芯鞘構造、あるいはサイドバイ
サイド構造のもので、チッソ（株）のＥＳ繊維（１００
〜１４８℃）なども好ましいものである。一方、高融点
成分としては、融点１６０℃以上のものが好ましく用い
られ、例えば、ポリプロピレン（１６５℃）、ポリエス
テル（２５６℃）、ポリアミド（２２０℃）、ポリブチ
レンテレフタレート（２３０℃）などのポリマーが、剛
性および耐熱性の点で優れ、ホットメルト樹脂のビード
取付けなどの加工に際し、高い濾材の熱変形防止性が得
られる。Further, the above-mentioned heat-adhesive fiber is a composite of a low-melting component and a high-melting component. As the low-melting component, those having a melting point of 70 ° C. or more and 150 ° C. or less are preferably used. Polyester-based core-sheath structure “Safmet” (110 ° C.) and Kanebo “Belcombi” (110-130 ° C.) are preferred. It is a polyolefin-based core-sheath structure or side-by-side structure, and is manufactured by Chisso Corporation's ES fiber (100%).
To 148 ° C.) are also preferable. On the other hand, as the high melting point component, those having a melting point of 160 ° C. or higher are preferably used. For example, polymers such as polypropylene (165 ° C.), polyester (256 ° C.), polyamide (220 ° C.), and polybutylene terephthalate (230 ° C.) It is excellent in terms of rigidity and heat resistance, and can provide a high filter medium thermal deformation prevention property in processing such as mounting a bead of a hot melt resin.
【００１１】その熱接着性繊維の形態としては、繊維断
面の外周部の少なくとも一部に低融点成分を用い、その
他の部分に高融点重合体成分を用いた芯鞘型、また、バ
イメタル型、分割多弁型などの複合繊維が用いられる。
特に、低融点ポリエステル系重合体や低融点ポリアミド
系重合体が繊維外周の一部に用いられた芯鞘型複合繊維
が好適素材である。そのなかでも低融点成分としての２
００℃以下のポリエステル系重合体を鞘成分に持つ芯鞘
複合繊維が、濾材の剛性に優れ、また難燃剤の吸塵性の
面からも好適である。As the form of the heat-adhesive fiber, a core-sheath type using a low-melting-point component in at least a part of the outer periphery of the fiber cross-section and a high-melting-point polymer component in the other part, a bimetal type, A composite fiber such as a split multi-valve type is used.
In particular, a core-sheath type composite fiber in which a low-melting-point polyester polymer or a low-melting-point polyamide polymer is used for a part of the fiber outer periphery is a preferable material. Among them, 2 as a low melting point component
A core-sheath composite fiber having a polyester polymer having a sheath component of 00 ° C. or less is excellent in the rigidity of the filter medium and is also suitable from the viewpoint of the dust-absorbing property of the flame retardant.
【００１２】本発明においては、難燃剤を熱接着性繊維
表面に熱接着させるとともに、その一部を熱接着性繊維
の内部に吸塵させるが、かかる難燃剤としては、ヘキサ
ブロムシクロドデカン、テトラブロムビスフェノール
Ａ、デカブロムジフェニルオキサイド、三酸化アンチモ
ン、ポリリン酸系、リン酸エステル系化合物などが用い
られる。なかでも、ポリエステル系繊維に対しては、熱
溶融流動性効果を高める作用の高いヘキサブロムシクロ
ドデカンが適するものであるが、繊維内部に侵入しやす
いように微細に調整された他の難燃剤も適するものであ
る。また難燃剤は、化学組成の異なる吸塵されるタイプ
または吸塵されないタイプの難燃剤と併用する形で用い
てもかまわない。In the present invention, a flame retardant is thermally adhered to the surface of the heat-adhesive fiber, and a part of the heat-adhesive fiber is absorbed into the interior of the heat-adhesive fiber. Examples of the flame retardant include hexabromocyclododecane and tetrabromo. Bisphenol A, decabromodiphenyl oxide, antimony trioxide, polyphosphoric acid type, phosphoric acid ester type compound and the like are used. Above all, for polyester fibers, hexabromocyclododecane, which has a high effect of enhancing the hot melt fluidity effect, is suitable, but other flame retardants finely adjusted to easily penetrate into the fiber are also It is suitable. Further, the flame retardant may be used in combination with a dust-absorbing type or a non-dust-absorbing type flame retardant having a different chemical composition.
【００１３】さらに、かかる熱接着性繊維内部に難燃剤
を吸塵させることで難燃化を図る。ここで吸塵とは、難
燃剤が熱作用によって軟化してあるいは溶融して分子間
が粗となった熱接着性繊維表面から繊維内部に染み込む
ことを意味するものである。従って、難燃剤が繊維内部
に染み込み、また、吸塵されなかった一部の難燃剤は繊
維表面にとどまり繊維表面に熱接着するので従来必要で
あったバインダーを特に必要としない。また、繊維内部
に吸塵される特性をもつ難燃剤と吸塵されない特性の難
燃剤が併用された場合は、少なくとも一部の難燃剤は吸
塵され、また、吸塵されずに残った難燃剤は熱接着して
繊維表面にとどまる。Furthermore, Ru FIG flame retardant such heat bondable fibers inside flame retardant by causing dirt pickup. Here, dust absorption means that the flame retardant is softened or melted by the action of heat and penetrates into the interior of the fiber from the surface of the heat-adhesive fiber whose molecular weight is coarse. Therefore, the flame retardant soaks into the interior of the fiber, and some of the flame retardant that has not been absorbed by the dust stays on the fiber surface and is thermally bonded to the fiber surface. Also, when the flame retardant of the flame retardant and dust suction is not characteristic with a characteristic which is a dust suction inside fibers are combined, a flame retardant of at least a part is a dust suction, also, a flame retardant that remains without being dust suction heat Glues and stays on the fiber surface.
【００１４】また、用いた不織布が熱接着性繊維の他
に、通常の非熱接着性の繊維が含まれる場合、少なくと
も熱接着性繊維には難燃剤が繊維表面の少なくとも一部
に熱接着あるいは内部に染み込むことで難燃化が達成さ
れるものである。When the non-woven fabric used contains ordinary non-thermo-adhesive fibers in addition to the thermo-adhesive fibers, at least the heat-adhesive fibers are heat-bonded to at least a part of the fiber surface. Flame retardation is achieved by penetrating inside.
【００１５】以下、本発明の製造方法について述べる。
熱接着性繊維を含む不織布に、難燃剤が分散または溶解
された水溶液を付着後、かかる低融点成分の融点以上の
温度で熱処理して、難燃剤を熱接着性繊維表面に熱接着
させる。付着方法としては、特に限定されるものではな
いが、液に含浸する方法や液をスプレーする方法などが
用いられる。Hereinafter, the production method of the present invention will be described.
After the aqueous solution in which the flame retardant is dispersed or dissolved is adhered to the nonwoven fabric containing the heat-adhesive fiber, heat treatment is performed at a temperature equal to or higher than the melting point of the low-melting component to thermally bond the flame retardant to the surface of the heat-adhesive fiber. The adhesion method is not particularly limited, but a method of impregnating in a liquid, a method of spraying a liquid, and the like are used.
【００１６】さらに、熱接着性繊維を構成する特に外周
部の低融点成分の分子が、上記の軟化温度から溶融温度
以上の加熱によって激しい熱運動を起こし、これによっ
て難燃剤が繊維内部に染み込む（吸塵される）のであ
る。また一部の難燃剤は難燃剤の粗大粒子の形でポリマ
ーに、熱接着して一体化されて残るのである。染み込む
深さは、熱接着性繊維を構成する重合体と難燃剤の種類
および粒子径、あるいは熱処理温度・時間によってこと
なるが、ポリエステル系の場合、概ね表層から数十ミク
ロン程度以内である。Furthermore, the molecules of the low-melting-point component, particularly at the outer peripheral portion, constituting the heat-adhesive fiber cause intense thermal motion due to heating from the softening temperature to the melting temperature or higher, whereby the flame retardant permeates into the fiber. Dust is absorbed). Also, some of the flame retardants remain in the form of coarse particles of the flame retardant by heat bonding to the polymer. The penetration depth depends on the type and particle size of the polymer and the flame retardant constituting the heat-adhesive fiber, or the heat treatment temperature and time. In the case of polyester, however, the penetration depth is generally within about several tens of microns from the surface layer.
【００１７】難燃化は、繊維内部に難燃剤が吸塵される
ことで、火炎の接触に伴う熱溶融性が高まり、収縮性を
大きくする効果が得られ、火炎から遠ざかる効果によっ
て達成されると考えられる。この効果は繊維表面に吸塵
されずに付着している難燃剤によってももたらされる。When the flame retardant is absorbed by the flame retardant inside the fiber, the effect of increasing the heat melting property due to the contact of the flame and the effect of increasing the shrinkage can be obtained, and the flame retardant is achieved by the effect of moving away from the flame. Conceivable. This effect is also provided by the flame retardant adhering to the fiber surface without absorbing dust.
【００１８】高い吸塵効果を得るためには、熱接着性繊
維を形成する低融点成分の融点マイナス５℃から、熱接
着性繊維を形成する高融点成分の融点マイナス２０℃の
範囲内において、好ましくは難燃剤の融点以上で熱処理
することが好ましい。例えば、難燃剤にヘキサブロムシ
クロドデカンを用い、熱接着性繊維の低融点成分に融点
１６０℃のものを用いたケースでは１６０〜２３０℃の
熱処理温度で加工するのが吸塵率が高いものが得られ、
少量の難燃剤使用量で難燃化が達成できるのである。ま
た吸塵率を高めるために繊維可塑剤を併用しても良い。In order to obtain a high dust-absorbing effect, it is preferable that the melting point of the low-melting-point component forming the heat-adhesive fiber is minus 5 ° C. to the melting point of the high-melting-point component forming the heat-adhesive fiber minus 20 ° C. Is preferably heat-treated at a temperature equal to or higher than the melting point of the flame retardant. For example, in the case of using hexabromocyclododecane as the flame retardant and using a material having a melting point of 160 ° C. as the low melting point component of the heat-adhesive fiber, processing at a heat treatment temperature of 160 to 230 ° C. results in a material having a high dust absorption rate. And
Flame retardation can be achieved with a small amount of flame retardant used. Further, a fiber plasticizer may be used in combination to increase the dust absorption rate.
【００１９】本発明においては、難燃性濾材に別の不織
布が少なくとも１層積層されたものも好ましく用いられ
るが、かかる不織布としては、短繊維不織布、長繊維不
織布、バーストファィバー方式の不織布、あるいはメル
トブロー不織布や静電紡糸不織布などが用いられる。形
態はウエッブ状のものや、シート状、樹脂加工によって
繊維固定したものなどである。中でもメルトブロー不織
布が平均繊維径が小さく薄い材料で、捕集効率が高いも
のが得られるので好ましく、さらにはエレクトレット化
された不織布が低圧損で捕集効率が高いので最適であ
る。特に濾材を使いピッチで山折りすることにより作る
薄い空気フィルターには好適な材料である。積層方法は
特に限定されないが、超音波接着や、シンター接着、湿
気硬化型ウレタンの散布によって接着したものなどが、
厚み変化が少ないので好ましい。In the present invention, a non-woven fabric obtained by laminating at least one layer of another non-woven fabric on a flame-retardant filter medium is preferably used. Such non-woven fabrics include short-fiber non-woven fabric, long-fiber non-woven fabric, burst fiber non-woven fabric, and Melt blown nonwoven fabric, electrostatic spun nonwoven fabric and the like are used. The form may be a web-like form, a sheet-like form, or a fiber-fixed form by resin processing. Among them, a melt-blown nonwoven fabric is preferable because it is a thin material having a small average fiber diameter and a high collection efficiency can be obtained, and an electret nonwoven fabric is optimal because of low pressure loss and high collection efficiency. In particular, it is a suitable material for a thin air filter formed by mountain-folding at a pitch using a filter medium. Lamination method is not particularly limited, such as ultrasonic bonding, sinter bonding, and those bonded by spraying moisture-curable urethane,
This is preferable because the change in thickness is small.
【００２０】なお、難燃剤が繊維内部に吸塵されている
かどうかは、濾材を精練したのちエネルギー分散型Ｘ線
分析計（ＳＥＭ−ＸＭＡ）を用いて繊維断面部分の特に
表層の元素分析で行うものである。Whether or not the flame retardant is absorbed in the fibers is determined by scouring the filter medium and then performing elemental analysis of the cross section of the fiber, particularly the surface layer, using an energy dispersive X-ray analyzer (SEM-XMA). It is.
【００２１】[0021]
【実施例】実施例をもって更に詳細に本発明を説明す
る。The present invention will be described in more detail with reference to examples.
【００２２】実施例１ 繊度１５デニールのポリエステル系芯鞘型熱接着性短繊
維（融点１１０℃／２５６℃）と４デニールのポリエス
テル系芯鞘型熱接着性短繊維（融点８５℃／２５６℃）
が６：４で混合された目付５５ｇ／ｍ2 の不織布に、難
燃剤（ヘキサブロムシクロドデカンのデスパージョン）
が１０重量％、および浸透剤１重量％、繊維可塑剤１重
量％が分散された分散液をスプレー法で繊維重量比、固
形分で１０重量％付着させた後、１８５℃の乾燥機で１
０分間乾燥・熱処理して難燃剤を繊維内部に吸塵させ
た。次に、クリアランスを０．２ｍｍ設けた熱ロール間
で押圧して、厚さ０．２８ｍｍ、目付６７ｇ／ｍ2 の繊
維間接着された難燃性濾材を得た。Example 1 Polyester core-sheath type heat-adhesive short fiber having a fineness of 15 denier (melting point: 110 ° C./256° C.) and 4 denier polyester core-sheath type thermo-adhesive short fiber (melting point: 85 ° C./256° C.)
Flame retardant (dispersion of hexabromocyclododecane) on a non-woven fabric with a basis weight of 55 g / m 2 mixed at a ratio of 6: 4
10% by weight, 1% by weight of a penetrant, and 1% by weight of a fiber plasticizer were applied by a spray method to deposit 10% by weight of a fiber weight ratio and a solid content, and then 1% by a dryer at 185 ° C.
After drying and heat treatment for 0 minutes, the flame retardant was absorbed into the fibers. Next, the filter was pressed between hot rolls having a clearance of 0.2 mm to obtain a flame-retardant filter medium having a thickness of 0.28 mm and a basis weight of 67 g / m 2, which was bonded between fibers.
【００２３】難燃剤の付着状態をＳＥＭ−ＸＭＡで観察
したところ、繊維内部にもハロゲンの吸収が認められ難
燃剤が繊維内部に吸塵されたことを示すものであった。
また繊維表面にも難燃剤がまだ吸塵されずに熱接着して
いることが認められた。When the state of adhesion of the flame retardant was observed by SEM-XMA, it was found that halogen was also absorbed inside the fiber, indicating that the flame retardant was absorbed into the fiber.
It was also found that the flame retardant was still thermally adhering to the fiber surface without dust absorption.
【００２４】このサンプルの難燃性をＪＩＳ−Ｌ１０９
１（Ａ−１法）で試験したところ区分３の高い難燃性を
示した。The flame retardancy of this sample was measured according to JIS-L109.
Test 1 (A-1 method) showed high flame retardancy of Category 3.
【００２５】この難燃性濾材の通気量は３９０ｃｃ／cm
2 ・秒であった。The ventilation volume of the flame-retardant filter medium is 390 cc / cm.
2 seconds.
【００２６】比較例１ 繊度１５デニールのポリエステル系芯鞘型熱接着性短繊
維（融点１１０℃／２５６℃）と４デニールのポリエス
テル系芯鞘型熱接着性短繊維（融点８５℃／２５６℃）
が６：４で混合された目付５５ｇ／ｍ2 の不織布を１８
５℃の乾燥機で１分間処理して熱接着を行ったあとクリ
アランス０．２ｍｍを設けた熱ロール間で押圧して、厚
さ０．２８ｍｍ、目付６５ｇ／ｍ2 の繊維間接着された
不織布シートを得た。このサンプルの難燃性をＪＩＳ−
Ｌ１０９１（Ａ−１法）で試験したところ区分２で難燃
性が低いものであった。COMPARATIVE EXAMPLE 1 Polyester core-sheath type heat-adhesive short fibers having a fineness of 15 denier (melting point: 110 ° C./256° C.) and 4-denier polyester core-sheath type thermoadhesive short fibers (melting point: 85 ° C./256° C.)
Of non-woven fabric having a basis weight of 55 g / m 2 mixed at a ratio of 6: 4 with 18
After a 1 minute heat treatment in a dryer at 5 ° C., a non-woven fabric sheet having a thickness of 0.28 mm and a basis weight of 65 g / m 2 was pressed by pressing between heat rolls having a clearance of 0.2 mm. I got JIS-
When tested by L1091 (A-1 method), the flame retardancy was low in Category 2.
【００２７】比較例２ 比較例１で得た不織布シートを塩化ビニール樹脂エマル
ジョンと難燃剤（ヘキサブロムシクロドデカンのデスパ
ージョン）が３：７で混合された濃度３０重量％液に含
浸して、難燃剤を繊維重量に対して２０重量％付着させ
た。乾燥後、難燃性をＪＩＳ−Ｌ１０９１（Ａ−１法）
で試験したところ区分３の難燃性が得られたが、通気量
は２２０ｃｃ／cm2 ・秒で実施例１より通気抵抗の高い
ものであった。Comparative Example 2 The nonwoven fabric sheet obtained in Comparative Example 1 was impregnated with a 30% by weight liquid in which a vinyl chloride resin emulsion and a flame retardant (dispersion of hexabromocyclododecane) were mixed at a ratio of 3: 7. The flame retardant was applied in an amount of 20% by weight based on the weight of the fiber. After drying, the flame retardancy was measured according to JIS-L1091 (A-1 method).
As a result, the flame retardancy of Category 3 was obtained, but the air flow rate was 220 cc / cm 2 · second and the air flow resistance was higher than that of Example 1.
【００２８】実施例２ 実施例１で得た難燃性濾材にエレクトレット化メルトブ
ロー不織布（目付１５ｇ／ｍ2 ）を低融点パウダー５ｇ
／ｍ2 を用いて積層した。このサンプルの難燃性をＪＩ
Ｓ−Ｌ１０９１（Ａ−１法）で試験したところ区分３の
高い難燃性を示した。Example 2 Electret melt-blown nonwoven fabric (15 g / m 2 in area weight) was added to the flame-retardant filter medium obtained in Example 1 in an amount of 5 g of low melting powder.
/ M2. The flame retardancy of this sample was determined by JI
When tested by S-L1091 (A-1 method), it showed a high flame retardancy of Category 3.
【００２９】[0029]
【００３０】[0030]
【００３１】[0031]
【００３２】[0032]
【発明の効果】本発明においては、従来難燃性濾材を得
るために、難燃剤の付着あるいは繊維間固定のために必
要であったバインダーを用いることがなく、一部の難燃
剤が熱接着性繊維の内部に染み込んでいるとともに、染
み込まなかった難燃剤は熱接着性繊維の表面にとどまっ
ているので、通気性に優れた難燃性濾材を低コストで得
ることが可能である。In the present invention, in order to obtain a conventional flame-retardant filtering medium, rather name be used binder was required for adhesion or inter-fiber fixing of the flame retardant, some of the flame retardant
The agent is seeping into the inside of the thermo-adhesive fiber,
Flame retardants not incorporated remain on the surface of the thermo-adhesive fiber.
Since it is, it is possible to obtain a flame retardant filtering medium which is excellent in breathability at a low cost.
Claims (12)
分とが複合された熱接着性繊維によって繊維間接着され
た不織布に、難燃剤が用いられてなる難燃性濾材におい
て、該難燃剤は、一部の難燃剤が熱接着性繊維の内部に染み
込んでいるとともに、染み込まなかった難燃剤は熱接着
性繊維の表面にとどまって いることを特徴とする難燃性
濾材。At least a portion comprises a low melting point component and a high melting point component.
In minutes and is bonded between fibers by heat-adhesive fibers composite nonwoven, in flame-retardant filtering medium consisting used flame retardants, flame retardant, some of the flame retardant in the heat-adhesive fibers stain
Flame retardant that is soaked but not soaked is thermally bonded
A flame-retardant filter medium characterized in that it stays on the surface of a conductive fiber .
あることを特徴とする請求項２記載の難燃性濾材。2. A low melting point component, the flame retardancy filter medium 請 Motomeko 2 wherein you characterized in that the polyester-based polymer.
含むものであることを特徴とする請求項１または２記載
の難燃性濾材。3. A flame retardant filtering medium according to claim 1 or 2, wherein the flame retardant is characterized in that containing hexa bromine cyclododecane.
層されたものであることを特徴とする請求項求１〜３の
いずれかに記載の難燃性濾材。4. A flame-retardant filtering medium according to any of claims KoMotome 1-3 of flame-retardant filtering medium in the nonwoven fabric is characterized in that laminated on at least one layer.
を特徴とする請求項４記載の難燃性濾材。5. The flame-retardant filter medium according to claim 4 , wherein said non-woven fabric is a melt-blown non-woven fabric.
とを特徴とする請求項４または請求項５記載の難燃性濾
材。6. The method of claim 4 or claim 5 flame retardant filtering medium, wherein the nonwoven fabric is an electret sheet.
性繊維を用いた不織布に、難燃剤が分散または溶解され
た水溶液を付着後、該低融点成分の融点以上の温度で熱
処理することにより、該難燃剤の一部を熱接着性繊維の
内部に染み込ませるとともに、染み込まなかった難燃剤
を熱接着性繊維の表面にとどまらせて、繊維間接着を行
うことを特徴とする難燃性濾材の製造方法。7. An aqueous solution in which a flame retardant is dispersed or dissolved is adhered to a nonwoven fabric using a heat-adhesive fiber containing a low-melting component and a high-melting component, and then heat-treated at a temperature equal to or higher than the melting point of the low-melting component. by a portion of the flame retardant heat-adhesive fibers
Flame retardant that penetrated into the inside and did not penetrate
A method for producing a flame-retardant filter medium, wherein the fibers are left on the surface of the heat-adhesive fibers to perform inter-fiber adhesion.
用いたことを特徴とする請求項７記載の難燃性濾材の製
造方法。 8. A low melting component, a polyester-based polymer
The method for producing a flame-retardant filter medium according to claim 7, wherein the filter medium is used.
を含むものを用いたことを特徴とする請求項７または８
記載の難燃性濾材の製造方法。 9. A flame retardant according to claim 7 or 8, characterized by using those containing hexa bromine cyclododecane
A method for producing the flame-retardant filter medium according to the above.
層積層させたものであることを特徴とする請求項８記載
の難燃性濾材の製造方法。10. A flame retardant filtering medium, a nonwoven fabric of at least 1
The method of producing a flame-resistant filter medium according to claim 8, wherein a is obtained by the layer stack.
たことを特徴とする請求項１０記載の難燃性濾材の製造
方法。11. A non-woven fabric comprising a melt-blown non-woven fabric .
The method for producing a flame-retardant filter medium according to claim 10, wherein
いたことを特徴とする請求項１０または１１記載の難燃
性濾材の製造方法。 12. A nonwoven fabric, use electret sheet
Claim 10 or 11 The method of producing a flame-resistant filter medium according to, characterized in that had.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5335478A JP2705554B2 (en) | 1993-12-28 | 1993-12-28 | Flame-retardant filter medium and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5335478A JP2705554B2 (en) | 1993-12-28 | 1993-12-28 | Flame-retardant filter medium and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07185238A JPH07185238A (en) | 1995-07-25 |
| JP2705554B2 true JP2705554B2 (en) | 1998-01-28 |
Family
ID=18289024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5335478A Expired - Fee Related JP2705554B2 (en) | 1993-12-28 | 1993-12-28 | Flame-retardant filter medium and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2705554B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3270446B2 (en) * | 1995-07-27 | 2002-04-02 | 大成建設株式会社 | Clean booth or semiconductor manufacturing equipment |
| JP3270445B2 (en) * | 1995-07-27 | 2002-04-02 | 大成建設株式会社 | Clean room |
| JP4446673B2 (en) * | 2003-03-28 | 2010-04-07 | 日本バイリーン株式会社 | Coarse dust filter |
| JP4880934B2 (en) * | 2005-07-22 | 2012-02-22 | 日本バイリーン株式会社 | Laminate and filter media |
| JP2007083467A (en) * | 2005-09-21 | 2007-04-05 | Japan Vilene Co Ltd | Composite sheet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0568824A (en) * | 1991-09-13 | 1993-03-23 | Toray Ind Inc | Flame-retardant filter medium and its production |
| JPH05212225A (en) * | 1992-02-04 | 1993-08-24 | Toray Ind Inc | Fire-retardant filter medium and its production |
-
1993
- 1993-12-28 JP JP5335478A patent/JP2705554B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07185238A (en) | 1995-07-25 |
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