JP3143860B2 - Water purification filter - Google Patents
Water purification filterInfo
- Publication number
- JP3143860B2 JP3143860B2 JP08075362A JP7536296A JP3143860B2 JP 3143860 B2 JP3143860 B2 JP 3143860B2 JP 08075362 A JP08075362 A JP 08075362A JP 7536296 A JP7536296 A JP 7536296A JP 3143860 B2 JP3143860 B2 JP 3143860B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- fiber
- water
- activated carbon
- nonwoven fabric
- 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
Landscapes
- Filtering Materials (AREA)
- Water Treatment By Sorption (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、活性炭素繊維を含
む浄水用フィルターに関するものであり、さらに詳しく
は冷蔵庫の自動製氷機あるいは給湯器など低水圧に好適
な浄水用フィルターに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification filter containing activated carbon fibers, and more particularly to a water purification filter suitable for low water pressure, such as an automatic ice maker or a water heater of a refrigerator.
【0002】[0002]
【従来技術】一般に、家庭に供給される飲料用の水道水
には殺菌のため1から2ppm程度の塩素が含まれてい
る。このため、水道水は塩素臭によって飲む人に不快感
を与える。2. Description of the Related Art Generally, drinking tap water supplied to households contains about 1 to 2 ppm of chlorine for sterilization. For this reason, tap water gives a drinker discomfort due to chlorine odor.
【0003】この塩素臭を水道水から除去するため、粒
状の活性炭あるいは活性炭素繊維より成るフィルターに
て脱臭することが一般に行われている。活性炭素繊維
は、粒状の活性炭と比較して賦形性において優れてお
り、単位重量当たりの塩素除去性能も高いため、広く活
用されている。[0003] In order to remove this chlorine odor from tap water, it is common practice to deodorize it with a filter made of granular activated carbon or activated carbon fiber. Activated carbon fibers are widely used because they have excellent shapeability and high chlorine removal performance per unit weight as compared with granular activated carbon.
【0004】活性炭素繊維を用いたフィルターは、例え
ば実開平6−72619号に開示されているように、活
性炭素繊維からなる中空筒体の内周面および外周面と
に、それぞれ、通水性不織布を巻着して、フィルター両
端部を固形パラフィンで固着して成るものがある。As disclosed in Japanese Utility Model Laid-Open Publication No. Hei 6-72619, a filter using activated carbon fiber is provided with a water-permeable nonwoven fabric on the inner peripheral surface and the outer peripheral surface of a hollow cylindrical body made of activated carbon fiber, respectively. , And both ends of the filter are fixed with solid paraffin.
【0005】この考案は、内周面と外周面の不織布が中
空筒体を保護するとともに、この成形体の側面からの活
性炭素繊維の脱落を防止し、さらにフィルター両端部の
固形パラフィンは、端部からの活性炭素繊維の脱落を防
止している。これによって、浄化された水の中に活性炭
素繊維が混入するのを防止するようにしている。[0005] In this invention, the nonwoven fabric on the inner and outer peripheral surfaces protects the hollow cylindrical body, prevents the activated carbon fibers from falling off from the side surface of the molded body, and furthermore, the solid paraffin at both ends of the filter is free from the end. Activated carbon fibers are prevented from falling off the part. This prevents the activated carbon fibers from being mixed into the purified water.
【0006】[0006]
【発明が解決しようとする課題】活性炭素繊維の脱落を
防止する目的により使用している不織布の濾過径は細か
いため、通水性が低くなるという問題が生じてしまう。
特に、冷蔵庫の自動製氷機あるいは給湯器などの低水圧
の環境で上記した浄水用フィルターを用いる場合、顕著
に現れる。また、通水性を良くするために繊維径の太い
繊維を用いた不織布を用いると、不織布の濾過径が粗く
なり、活性炭素繊維が脱落してしまう問題が生じてしま
う。The nonwoven fabric used for the purpose of preventing the activated carbon fibers from falling off has a small filtration diameter, which causes a problem that water permeability is reduced.
In particular, when the above-described water purification filter is used in a low water pressure environment such as an automatic ice maker or a water heater of a refrigerator, the above problem is remarkable. Further, when a nonwoven fabric using a fiber having a large fiber diameter is used to improve water permeability, a problem occurs in that the filtration diameter of the nonwoven fabric becomes coarse, and the activated carbon fibers fall off.
【0007】特に、常時使用するフィルターは、湿った
状態にあるため初期通水は問題にならないが、自動製氷
機に組み込まれた浄水機のように、不使用期間が長く続
く場合はフィルターが乾燥し、このため乾燥状態から通
水する初期通水抵抗が問題となる。[0007] In particular, a filter which is always used has a damp condition, so that initial water flow is not a problem. However, when a filter is not used for a long period of time such as a water purifier incorporated in an automatic ice making machine, the filter is dried. However, there is a problem with the initial resistance to water flow from the dry state.
【0008】さらに、フィルタ−洗浄等により、フィル
ターの直径方向に外力が加わり、変形した場合、端部に
層間剥離のような割れを生じるので活性炭素繊維が脱落
するという問題も生まれてくる。Further, when an external force is applied in the diametrical direction of the filter due to washing of the filter and the like, when the filter is deformed, a crack such as delamination is generated at the end, so that there is a problem that the activated carbon fibers fall off.
【0009】本発明はこのような問題点に鑑みてなされ
たものであって、活性炭素繊維からなる円筒体のフィル
ターにおいて、低水圧時の通水性が良好で、しかも活性
炭素繊維の脱落を防止し、外力による型くずれを防止
し、これによって家庭用のみならず、冷蔵庫の自動製氷
機あるいは給湯器などに用いて好適な浄水用フィルター
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a cylindrical filter made of activated carbon fibers has good water permeability at low water pressure and prevents the activated carbon fibers from falling off. It is another object of the present invention to provide a water purification filter suitable for use not only in households but also in automatic refrigerators and water heaters for refrigerators, by preventing mold collapse due to external force.
【0010】[0010]
【課題を解決するための手段】本発明は、円筒体の内周
層と外周層がそれぞれ不織布からなり、内周層と外周層
の間の層が活性炭素繊維と熱溶融性繊維からなる混抄紙
によって構成され、円筒体の両端部を熱可塑性樹脂によ
って固着するようにした浄水用フィルターにおいて、不
織布を構成する繊維は、繊維径10〜50μmの繊維
と、繊維径0.5〜3μmの繊維を含み、かつ65%R
H、20℃における平衡水分率が5%以上の繊維を含む
ことを特徴とする浄水用フィルターである。According to the present invention, the inner peripheral layer and the outer peripheral layer of the cylindrical body are each formed of a nonwoven fabric, and the layer between the inner peripheral layer and the outer peripheral layer is formed of a mixture of activated carbon fibers and heat-meltable fibers. In the water purification filter which is made of paper and has both ends of a cylindrical body fixed with a thermoplastic resin, the fibers constituting the nonwoven fabric are a fiber having a fiber diameter of 10 to 50 μm and a fiber having a fiber diameter of 0.5 to 3 μm. And 65% R
H, a filter for water purification characterized by containing fibers having an equilibrium moisture content at 20 ° C. of 5% or more.
【0011】本発明のフィルターは、円筒体の外側ある
いは内側から半径方向に流体を透過させる。流体は不織
布を通して活性炭素繊維と熱溶融性繊維からなる混抄紙
を通過し、このとき活性炭素繊維の表面と流体とを接触
させることによって流体中に含まれる塩素等を除去す
る。そして浄化された流体を円筒体の中空部を通して、
あるいは外周側から排出することにより濾過を行う。[0011] The filter of the present invention allows fluid to permeate in the radial direction from outside or inside the cylindrical body. The fluid passes through a mixed paper made of activated carbon fibers and heat-meltable fibers through the nonwoven fabric. At this time, the surface of the activated carbon fibers is brought into contact with the fluid to remove chlorine and the like contained in the fluid. And the purified fluid passes through the hollow part of the cylinder,
Alternatively, filtration is performed by discharging from the outer peripheral side.
【0012】本発明の不織布は、繊維径10〜50μm
の繊維と、繊維径0.5〜3μmの繊維を用いることに
よって活性炭素繊維の通過を防ぎ、かつ通水性の良好な
濾過径が得られるため、活性炭素繊維の浄水への混入が
防止され、更に65%RH、20℃における平衡水分率
が5%以上の親水性繊維を用いることにより、不織布が
親水性になり、低水圧の時でも初期通水性が優れる。The nonwoven fabric of the present invention has a fiber diameter of 10 to 50 μm.
By using a fiber having a fiber diameter of 0.5 to 3 μm, the passage of activated carbon fibers is prevented, and a good filtration diameter with good water permeability is obtained, so that the activated carbon fibers are prevented from being mixed into purified water, Further, by using a hydrophilic fiber having an equilibrium moisture content of 5% or more at 65% RH and 20 ° C., the nonwoven fabric becomes hydrophilic, and the initial water permeability is excellent even at a low water pressure.
【0013】以下、本発明を詳細に説明する。本発明で
使用できる活性炭素繊維はポリアクリロニトリル、レー
ヨン、ピッチ、フェノール樹脂等のフィラメントあるい
はステープルを原料とする活性炭素繊維が用いられ、製
造方法とともに特に制限されない。活性炭素繊維の比表
面積は、塩素除去性能が高い700m2 /g以上のもの
がよく用いられ、用途、要求特性に応じて適切な比表面
積のものが使用可能である。Hereinafter, the present invention will be described in detail. Activated carbon fibers that can be used in the present invention are activated carbon fibers made from filaments or staples such as polyacrylonitrile, rayon, pitch, and phenolic resin, and are not particularly limited with the production method. As the specific surface area of the activated carbon fiber, those having a high chlorine removal performance of 700 m 2 / g or more are often used, and those having an appropriate specific surface area can be used according to the application and required characteristics.
【0014】熱溶融性繊維は混抄紙に賦形性を付与する
ものでポリアミド、ポリエステル、ポリエチレン等熱溶
融性の繊維で、該浄水フィルターへの加工の際に形態を
保持し、活性炭素繊維の性能を劣化させないものがよ
い。具体的にはフィルター両端部の当該熱可塑性樹脂の
融点より高い融点を有する繊維が用いられる。また、熱
溶融性繊維は融点が鞘材よりも芯材のほうが高い構成を
有する芯鞘繊維を用いるのが好ましい。このような芯鞘
繊維としては、芯材がポリエステル、鞘材がポリエチレ
ンからなる芯鞘繊維が特に好ましく用いられる。The heat-meltable fiber is a fiber that imparts shapeability to the mixed paper and is a heat-meltable fiber such as polyamide, polyester, or polyethylene. Those that do not degrade the performance are better. Specifically, fibers having a melting point higher than the melting point of the thermoplastic resin at both ends of the filter are used. It is preferable to use a core-sheath fiber having a configuration in which the melting point of the core material is higher than that of the sheath material. As such a core-sheath fiber, a core-sheath fiber whose core material is made of polyester and whose sheath material is made of polyethylene is particularly preferably used.
【0015】混抄紙は活性炭素繊維および熱溶融性繊維
から成る。混抄紙の強度を保持し混抄紙の賦形性が良好
であるという点で、混抄紙に対する活性炭素繊維の重量
は50〜80重量%が好ましい。[0015] The mixed paper is composed of activated carbon fibers and hot melt fibers. From the viewpoint that the strength of the mixed paper is maintained and the shapeability of the mixed paper is good, the weight of the activated carbon fiber with respect to the mixed paper is preferably 50 to 80% by weight.
【0016】活性炭素繊維が80重量%より大きい場合
は賦形性が低下し、活性炭素繊維の脱落を招来する。5
0重量%より小さい場合は混抄紙の重量当たりのあるい
は円筒体の体積当たりの水道水の浄化能力の低下を招来
する。When the content of the activated carbon fibers is more than 80% by weight, the shapeability is reduced, and the activated carbon fibers fall off. 5
If the amount is less than 0% by weight, the purification ability of tap water per weight of the mixed paper or per volume of the cylindrical body is reduced.
【0017】また、混抄紙は成形体への賦形の際や賦形
後において、内周と外周とで歪の大きさに差が生じる。
この歪の大きさの差を小さくし、かつ混抄紙の引張強度
を保つために混抄紙の厚さは0.3〜0.6mmが好ま
しい。In addition, the mixed paper has a difference in the magnitude of distortion between the inner periphery and the outer periphery during or after shaping into a molded article.
The thickness of the mixed paper is preferably 0.3 to 0.6 mm in order to reduce the difference in the magnitude of the strain and maintain the tensile strength of the mixed paper.
【0018】混抄紙からなる円筒体は外側と内側とをそ
れぞれ不織布が巻着されることになる。The cylindrical body made of the mixed paper has the nonwoven fabric wound around the outside and the inside, respectively.
【0019】不織布は活性炭素繊維の脱落を防止するば
かりでなく、円筒体の形態保持の点からも必要である。
機能的には、通水性が良好で濾過性を有するものがよ
い。さらに、浄水フィルターへ加工する際に不織布およ
び活性炭素繊維の機能を損なうことなく、形態を保持す
るものがよい。具体的にはフィルター両端部の当該熱可
塑性樹脂の融点より高い融点を有する繊維からなる不織
布が用いられる。The nonwoven fabric is necessary not only to prevent the activated carbon fibers from falling off but also to maintain the shape of the cylindrical body.
Functionally, those having good water permeability and filterability are preferred. Further, it is preferable that the filter retains its shape without impairing the functions of the nonwoven fabric and the activated carbon fiber when processed into a water purification filter. Specifically, a nonwoven fabric made of fibers having a melting point higher than the melting point of the thermoplastic resin at both ends of the filter is used.
【0020】不織布は、活性炭素繊維の脱落を防止する
ために、繊維径の細い繊維のみを使用すると通水性が損
なわれる。そこで、活性炭素繊維の脱落を防止すること
と、通水性を良くすることの相反する両者の特性を同時
に満たすことができるように、不織布には繊維径が10
〜50μmに分布する繊維と、繊維径が0.5〜3μm
に分布する繊維を含むものを使用するのがよい。In the nonwoven fabric, if only fibers having a small fiber diameter are used in order to prevent the activated carbon fibers from falling off, water permeability is impaired. Therefore, the nonwoven fabric has a fiber diameter of 10 so that the opposite properties of preventing the activated carbon fiber from falling off and improving water permeability can be satisfied at the same time.
Fibers distributed to 50 μm and fiber diameter of 0.5 to 3 μm
It is preferable to use a material containing fibers distributed in the polymer.
【0021】繊維径が10〜50μmに分布する繊維と
繊維径が0.5〜3μmに分布する繊維とを用いること
により、不織布に通水性と、標準的に繊維径が5〜10
μmである活性炭素繊維の脱落を防止することができ
る。By using fibers having a fiber diameter of 10 to 50 μm and fibers having a fiber diameter of 0.5 to 3 μm, water permeability to the nonwoven fabric and a fiber diameter of 5 to 10
It is possible to prevent the activated carbon fibers of μm from falling off.
【0022】さらに、不織布の初期通水性を向上させる
上で平衡水分率が5%以上の繊維を使用するのが好まし
い。平衡水分率はJIS-L-1015に基づき65%RH、20
℃における繊維の水分率を表す。具体的には不織布には
平衡水分率5%以上の繊維を5〜15重量%含むものが
好ましい。Further, in order to improve the initial water permeability of the nonwoven fabric, it is preferable to use fibers having an equilibrium moisture content of 5% or more. Equilibrium moisture content is 65% RH, 20 based on JIS-L-1015.
Represents the moisture content of the fiber at ° C. Specifically, the nonwoven fabric preferably contains 5 to 15% by weight of a fiber having an equilibrium moisture content of 5% or more.
【0023】平衡水分率5%以上の繊維が5%に満たな
い場合、不織布に十分な親水性を与えることができず、
初期通水性が劣る。平衡水分率5%以上の繊維が15%
を超える場合、初期通水性は良くなるが、初期通水後の
通水性が悪くなる。平衡水分率5%以上の繊維としては
レーヨン、綿等が用いられ、特にレーヨンが好ましい。When the fiber having an equilibrium moisture content of 5% or more is less than 5%, the nonwoven fabric cannot have sufficient hydrophilicity.
Poor initial water permeability. 15% fiber with equilibrium moisture content of 5% or more
When it exceeds, the initial water permeability is improved, but the water permeability after the initial water penetration is deteriorated. Rayon, cotton or the like is used as the fiber having an equilibrium moisture content of 5% or more, and rayon is particularly preferable.
【0024】円筒体の両端の切断面からの活性炭素繊維
の脱落を防止するために切断面を熱可塑性樹脂によって
固着している。具体的には酢酸ビニルとエチレンの共重
合体、あるいはポリオレフィン、あるいは該共重合体と
ポリオレフィンの混合物が好ましく、溶融温度が80〜
180℃のものが好ましい。また、食品衛生法適合の樹
脂を使用する。The cut surface is fixed with a thermoplastic resin in order to prevent the activated carbon fibers from falling off from the cut surfaces at both ends of the cylindrical body. Specifically, a copolymer of vinyl acetate and ethylene, or a polyolefin, or a mixture of the copolymer and a polyolefin is preferable, and the melting temperature is 80 to
Those at 180 ° C. are preferred. In addition, use a resin that complies with the Food Sanitation Law.
【0025】本発明を図面によって説明する。図1は、
本発明の浄水用フィルターの一部断面斜視図を示したも
のである。図2は、本発明の浄水用フィルターの端部を
樹脂で固着する前の模式図である。 図1及び図2にお
いて、1は混抄紙、2は不織布、3は端部樹脂固着部
(斜線部)である。The present invention will be described with reference to the drawings. FIG.
It is a figure which showed the partial cross section perspective view of the filter for water purification of this invention. FIG. 2 is a schematic diagram before fixing an end of the water purification filter of the present invention with a resin. 1 and 2, reference numeral 1 denotes a mixed paper, 2 denotes a nonwoven fabric, and 3 denotes an end resin fixing portion (hatched portion).
【0026】本発明の浄水用フィルターの製法は、まず
長尺の芯棒に該不織布、混抄紙、不織布の順に必要量を
巻装した後、加熱して混抄紙に含まれる熱溶融性繊維に
よって混抄紙相互あるいは混抄紙と不織布を熱融着して
熱セットする。The method for producing the water purification filter of the present invention is as follows. First, a required amount of the nonwoven fabric, the mixed paper, and the nonwoven are wound on a long core rod in this order, and then heated to obtain the hot melt fiber contained in the mixed paper. The non-woven fabric and the mixed paper or the non-woven fabric are heat-set to each other.
【0027】次いで、長尺の円筒体を切断して芯棒より
抜き取り、所定の長さのフィルターとする。この時のフ
ィルターの状態を図2に示す。そして、フィルム状に溶
融した熱可塑性樹脂をフィルターの端部に押圧し、樹脂
を含浸させ、その後冷却させることによって、図1に示
すような本発明の浄水用フィルターを形成することがで
きる。Next, the long cylindrical body is cut and extracted from the core rod to obtain a filter having a predetermined length. FIG. 2 shows the state of the filter at this time. Then, the thermoplastic resin melted into a film shape is pressed against the end of the filter, impregnated with the resin, and then cooled, whereby the water purification filter of the present invention as shown in FIG. 1 can be formed.
【0028】以下に実施例を挙げて本発明を具体的に説
明するが、本発明の効果確認のための評価方法を以下に
示す。Hereinafter, the present invention will be described specifically with reference to examples. An evaluation method for confirming the effects of the present invention will be described below.
【0029】塩素除去性能は塩素濃度2ppmの室温の
モデル水をフィルターの外周面から内周面に向けて通過
させて、通過後の塩素濃度が臭気限界値とされる0.4
ppmになるまで測定した。このときの通過した水の量
をもって塩素除去性能として評価した。The chlorine removal performance is such that room temperature model water having a chlorine concentration of 2 ppm is passed from the outer peripheral surface to the inner peripheral surface of the filter, and the chlorine concentration after passing the filter is defined as 0.4 which is the odor limit value.
It measured until it became ppm. The amount of water passed at this time was evaluated as chlorine removal performance.
【0030】活性炭素繊維の脱落は未使用のフィルター
5個をイオン交換水2リットル中に沈めて金網で固定
し、プロペラ回転により、流速0.5m/sで水を30
分間攪拌して水洗する。その洗浄水中の活性炭素繊維を
濾別して重量を測定して、フィルター1個当たりの活性
炭素繊維の重量をもって評価した。To remove the activated carbon fibers, five unused filters were immersed in 2 liters of ion-exchanged water, fixed with a wire mesh, and rotated at a flow rate of 0.5 m / s with a propeller to rotate 30 water.
Stir for a minute and wash with water. The activated carbon fibers in the washing water were separated by filtration and weighed, and evaluated by the weight of activated carbon fibers per filter.
【0031】初期通水性は、図3に示すような円筒の開
口部に未使用のフィルターを置き、他方の開口部に水道
水を1リットル注いで水深9cmになるようにして、外
周面から内周面に向けて水が通過する際、通過して内周
面より水が出てくるまでの時間をもって評価した。The initial water permeability is determined by placing an unused filter in the opening of the cylinder as shown in FIG. 3 and pouring 1 liter of tap water into the other opening to a depth of 9 cm so that the inner surface is inward from the outer peripheral surface. When the water passed toward the peripheral surface, the evaluation was based on the time required for the water to pass and emerge from the inner peripheral surface.
【0032】初期通水後の通水性は100リットル通水
後のフィルターを用いて、1リットルの水を通過させた
ときの時間当たりの通過水量をもって評価した。The water permeation after initial water permeation was evaluated by the amount of water per hour when 1 liter of water was passed using a filter after 100 liters of water permeation.
【0033】フィルター両端部の柔軟性は外力によって
該円筒体が直径方向に外径の30%以上変形した際に、
端部に層間剥離様の割れを生じるかどうかを目視で評価
した。The flexibility of both ends of the filter is such that when the cylindrical body is deformed by 30% or more of the outer diameter in the diameter direction due to external force,
It was visually evaluated whether or not cracks such as delamination occurred at the ends.
【0034】[0034]
【実施例1】ポリアクリロニトリルを原料とする活性炭
素繊維(東邦レーヨン(株)製 ファインガードFP3
41、比表面積 900m2 /g、銀添着)と、ポリエ
ステルを芯材、ポリエチレン鞘材とする芯鞘構造の熱溶
融性繊維からなる混抄紙(目付 60g/m2 、密度
0.13g/cm3 )を多重に巻着して、内径69m
m、外径75mm、高さ25mmの円筒体とし、その内
周面と外周面に不織布を巻着して加熱セットした。不織
布に用いた繊維と、その繊維径と、平衡水分率と、各繊
維の配合率を表1、及び表2に示す。この時の不織布の
目付は30g/m2 、厚さは0.13mm、密度は0.
23g/cm3 である。その後、酢酸ビニル/エチレン
共重合体を固着樹脂として使用して浄水用フィルターを
得た。このフィルターの各性能を表1に示す。Example 1 Activated carbon fiber made from polyacrylonitrile (Fineguard FP3 manufactured by Toho Rayon Co., Ltd.)
41, a mixed paper made of heat-meltable fibers having a core-sheath structure using polyester as a core material and a polyethylene sheath material (basis weight: 60 g / m 2 , density: 900 m 2 / g, silver impregnated)
0.13 g / cm 3 ) and wrapped multiple
m, a cylindrical body having an outer diameter of 75 mm and a height of 25 mm, and a nonwoven fabric was wound around the inner and outer peripheral surfaces thereof and heated and set. Tables 1 and 2 show the fibers used in the nonwoven fabric, the fiber diameter, the equilibrium moisture content, and the blending ratio of each fiber. At this time, the basis weight of the non-woven fabric was 30 g / m 2 , the thickness was 0.13 mm, and the density was 0.
23 g / cm 3 . Thereafter, a water purification filter was obtained using a vinyl acetate / ethylene copolymer as a fixing resin. Table 1 shows the performances of this filter.
【0035】[0035]
【表1】 [Table 1]
【0036】[0036]
【表2】 [Table 2]
【0037】[0037]
【実施例2、実施例3】混抄紙と不織布を表1に示すよ
うな構成で、その他は実施例1と同じ構成で浄水用フィ
ルターを作製した。このフィルターの各性能を表1に示
す。Example 2 and Example 3 A water purifying filter was manufactured in the same manner as in Example 1 except that the mixed paper and the nonwoven fabric were configured as shown in Table 1. Table 1 shows each performance of this filter.
【0038】[0038]
【比較例1】表1に示すように、不織布を構成する繊維
が繊維径10〜20μmに分布する繊維から成るフィル
ターを作製した。このフィルターの各性能を表1に示す
が、平衡水分率5%以上の繊維が含まれていないので初
期通水性が悪く、繊維径の細い繊維が含まれていないの
で活性炭素繊維の脱落量も多くなった。Comparative Example 1 As shown in Table 1, a filter comprising fibers in which the fibers constituting the nonwoven fabric were distributed in a fiber diameter of 10 to 20 μm was prepared. The performances of this filter are shown in Table 1. The fibers having an equilibrium moisture content of 5% or more are not included, so that the initial water permeability is poor. More.
【0039】[0039]
【比較例2】表1に示すように、混抄紙に対する活性炭
素繊維重量が90重量%のフィルターを作成した。この
フィルターの各性能を表1に示すが、混抄紙に対する活
性炭素繊維重量が多いために活性炭素繊維の脱落量も多
くなり、混抄紙の賦形性が悪化して端部の割れを生じ
た。Comparative Example 2 As shown in Table 1, a filter was prepared in which the weight of activated carbon fibers was 90% by weight based on the mixed paper. The performances of this filter are shown in Table 1. As the weight of the activated carbon fibers relative to the mixed paper was large, the amount of the activated carbon fibers that had dropped out was also large, and the shapeability of the mixed paper was deteriorated, resulting in cracks at the edges. .
【0040】[0040]
【比較例3】表1に示すように、端部を固着するものと
してパラフィンを使用したフィルターを作成した。この
フィルターの各性能を表1に示すが、端部にパラフィン
を使用しているために端部に割れを生じ易くなった。COMPARATIVE EXAMPLE 3 As shown in Table 1, a filter using paraffin was prepared for fixing the ends. The performance of this filter is shown in Table 1. As a result of using paraffin at the end, the end was liable to crack.
【0041】[0041]
【発明の効果】本発明の浄水用フィルターは、円筒状の
フィルターであって、その外周層と内周層とが、繊維径
10〜50μmの繊維と繊維径0.5〜3μmの繊維を
含み、かつ65%RH、20℃における平衡水分率が5
%以上の繊維を含む不織布によって構成され、これによ
って通水方向からの活性炭素繊維の脱落が防止されると
共に、低水圧で使用される場合においても通水初期から
通水性が高いものとなる。The filter for water purification of the present invention is a cylindrical filter, wherein the outer layer and the inner layer contain fibers having a fiber diameter of 10 to 50 μm and fibers having a fiber diameter of 0.5 to 3 μm. And the equilibrium moisture content at 65% RH and 20 ° C. is 5
% Of the fibers, which prevents the activated carbon fibers from falling off in the water passage direction, and has high water permeability from the beginning of water passage even when used at a low water pressure.
【0042】また、フィルターの両端部が熱可塑性樹脂
によって固着されているために、両端からの活性炭素繊
維の脱落も防止され、しかもフィルターの形態保持性も
よく、取扱い性に優れたものとなる。このようなフィル
ターは、製造工程が簡素で、かつフィルター上下の端部
が柔軟性を有し、浄水器に用いて好適な取扱い性に優れ
た浄水用フィルターとなる。Further, since both ends of the filter are fixed by the thermoplastic resin, the activated carbon fibers are prevented from falling off from both ends, and the filter retains a good shape and is excellent in handleability. . Such a filter has a simple manufacturing process, has flexibility at the upper and lower ends of the filter, and is a water purifying filter suitable for use in a water purifier and excellent in handleability.
【図1】本発明の浄水用フィルターの断面斜視図であ
る。FIG. 1 is a sectional perspective view of a water purification filter of the present invention.
【図2】本発明の浄水用フィルターの端部を熱可塑性樹
脂で固着する前の斜視図である。FIG. 2 is a perspective view before fixing an end of the water purification filter of the present invention with a thermoplastic resin.
【図3】浄水用フィルターの初期通水性を評価するため
の装置の正面図である。FIG. 3 is a front view of an apparatus for evaluating initial water permeability of a water purification filter.
1.混抄紙 2.不織布 3.端部樹脂固着部(斜線部) 4.浄水用フィルタ− 5.円筒 6.水 1. Mixed paper 2. Non-woven fabric 3. 3. Resin fixing portion at end (hatched portion) Filter for water purification -5. Cylinder 6. water
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B01D 39/16 C02F 1/28 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B01D 39/16 C02F 1/28
Claims (6)
からなり、内周層と外周層の間の層が活性炭素繊維と熱
溶融性繊維からなる混抄紙によって構成され、前記円筒
体の両端部を熱可塑性樹脂によって固着するようにした
浄水用フィルターにおいて、前記不織布を構成する繊維
は、繊維径10〜50μmの繊維と、繊維径0.5〜3
μmの繊維を含み、かつ65%RH、20℃における平
衡水分率が5%以上の繊維を含むことを特徴とする浄水
用フィルター。An inner layer and an outer layer of a cylindrical body are each made of a nonwoven fabric, and a layer between the inner layer and an outer layer is made of a mixed paper made of activated carbon fibers and heat-meltable fibers. In the water purification filter wherein both ends of the nonwoven fabric are fixed with a thermoplastic resin, the fibers constituting the nonwoven fabric are a fiber having a fiber diameter of 10 to 50 μm and a fiber having a fiber diameter of 0.5 to 3
A filter for water purification, comprising a fiber having a fiber of μm and an equilibrium moisture content at 65% RH and 20 ° C. of 5% or more.
℃における平衡水分率が5%以上の繊維の重量が5〜1
5重量%であることを特徴とする請求項1記載の浄水用
フィルター。2. The 65% RH, 20% relative to the nonwoven fabric
The weight of a fiber having an equilibrium moisture content at 5 ° C of 5% or more is 5-1.
The filter for water purification according to claim 1, wherein the content is 5% by weight.
H、20℃における平衡水分率が5%以上の繊維がレー
ヨンであることを特徴とする請求項1、請求項2記載の
浄水用フィルター。3. The 65% R of the water-permeable nonwoven fabric
H, The fiber whose equilibrium water content at 20 ° C. is 5% or more is rayon.
リエステルを芯材、ポリエチレンを鞘材とする芯鞘構造
の繊維であることを特徴とする請求項1記載の浄水用フ
ィルター。4. The filter for water purification according to claim 1, wherein the heat-fusible fibers constituting the mixed paper are fibers having a core-sheath structure using polyester as a core material and polyethylene as a sheath material.
量は50〜80重量%で、かつ前記混抄紙の厚さは0.
3〜0.6mmであることを特徴とする請求項1、請求
項4記載の浄水用フィルター。5. The weight of the activated carbon fiber relative to the mixed paper is 50 to 80% by weight, and the thickness of the mixed paper is 0.1%.
The filter for water purification according to claim 1, wherein the size of the filter is 3 to 0.6 mm.
の共重合体、あるいはポリオレフィン、あるいは前記共
重合体とポリオレフィンの混合物であることを特徴とす
る請求項1記載の浄水用フィルター。6. The filter according to claim 1, wherein the thermoplastic resin is a copolymer of vinyl acetate and ethylene, a polyolefin, or a mixture of the copolymer and polyolefin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08075362A JP3143860B2 (en) | 1996-03-06 | 1996-03-06 | Water purification filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08075362A JP3143860B2 (en) | 1996-03-06 | 1996-03-06 | Water purification filter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09239214A JPH09239214A (en) | 1997-09-16 |
JP3143860B2 true JP3143860B2 (en) | 2001-03-07 |
Family
ID=13574043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP08075362A Expired - Fee Related JP3143860B2 (en) | 1996-03-06 | 1996-03-06 | Water purification filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3143860B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104961267A (en) * | 2015-07-13 | 2015-10-07 | 江苏二泉环保集团有限公司 | Active carbon filter |
JP7288647B2 (en) * | 2018-11-14 | 2023-06-08 | ユニチカ株式会社 | filter |
JP6511557B1 (en) * | 2018-02-28 | 2019-05-15 | ユニチカ株式会社 | Wet mixed sheet for air cleaning |
JP7281806B2 (en) * | 2019-06-21 | 2023-05-26 | ユニチカ株式会社 | Water purification filters, water purification cartridges and pot-type water purifiers |
CN114981215A (en) * | 2020-03-31 | 2022-08-30 | 日本制纸株式会社 | Filter for purifying water and method for manufacturing the same |
JPWO2023008246A1 (en) | 2021-07-28 | 2023-02-02 |
-
1996
- 1996-03-06 JP JP08075362A patent/JP3143860B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH09239214A (en) | 1997-09-16 |
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