JP2021000605A - Water purification filter, water purification cartridge and pot type water treatment apparatus - Google Patents
Water purification filter, water purification cartridge and pot type water treatment apparatus Download PDFInfo
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- Filtering Materials (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
本発明は、浄水フィルター、浄水カートリッジ及びポット型浄水器に関する。 The present invention relates to a water purification filter, a water purification cartridge and a pot type water purifier.
従来、円筒形状の活性炭成型体を含む浄水フィルターが知られている。該浄水フィルターとして、活性炭成型体の活性炭が一部脱落し浄化された水に混入することを防ぐべく、円筒形状における外周側側面及び内周側側面に不織布を備えさせたものが知られている。 Conventionally, a water purification filter containing a cylindrical activated carbon molded body is known. As the water purification filter, a non-woven fabric is provided on the outer peripheral side surface and the inner peripheral side side surface in a cylindrical shape in order to prevent the activated carbon of the activated carbon molded body from partially falling off and being mixed with the purified water. ..
上記浄水フィルターとして、例えば、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、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0.5〜3μmの繊維を含み、かつ65%RH、20℃における平衡水分率が5%以上の繊維を含むことを特徴とする浄水フィルターが知られている(例えば特許文献1参照。)。該浄水フィルターによれば、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とされている。 As the water purification filter, for example, the inner peripheral layer and the outer peripheral layer of the cylindrical body are each made of a non-woven fabric, and the layer between the inner peripheral layer and the outer peripheral layer is made of a mixed paper made of activated carbon fibers and heat-meltable fibers. In a water purification filter in which both ends of a cylindrical body are fixed with a thermoplastic resin, the fibers constituting the non-woven fabric include fibers having a fiber diameter of 10 to 50 μm and fibers having a fiber diameter of 0.5 to 3 μm, and 65. A water purification filter characterized by containing fibers having an equilibrium moisture content of 5% or more at% RH and 20 ° C. is known (see, for example, Patent Document 1). According to the water purification filter, it is said that the activated carbon fibers are prevented from falling off from the water flow direction, and the water flow is high from the initial stage of water flow even when used at a low water pressure.
ところで、浄水カートリッジを備えた浄水器として、いわゆるポット型のものが知られている。このポット型浄水器は、上側に位置する原水貯留部と、下側に位置する浄水貯留部との間に浄水カートリッジを介在させる構造になっている。原水貯留部に貯留される原水は自重により浄水カートリッジを通って浄水貯留部に流れ、浄水カートリッジ内にて浄化される。 By the way, as a water purifier equipped with a water purification cartridge, a so-called pot type is known. This pot-type water purifier has a structure in which a water purification cartridge is interposed between a raw water storage section located on the upper side and a purified water storage section located on the lower side. The raw water stored in the raw water storage section flows to the purified water storage section through the water purification cartridge by its own weight, and is purified in the water purification cartridge.
ポット型浄水器は、原水が自重により浄水カートリッジを通るため、特許文献1で想定されている用途である冷蔵庫の自動製氷機あるいは給湯器よりも一層低水圧となる。そして、本発明者等は、特許文献1の浄水カートリッジをポット型浄水器に適用した場合、流量が充分でなく、浄水に時間がかかる場合があることを知得した。 Since the raw water passes through the water purification cartridge by its own weight, the pot-type water purifier has a lower water pressure than the automatic ice maker or water heater of the refrigerator, which is the application assumed in Patent Document 1. Then, the present inventors have learned that when the water purification cartridge of Patent Document 1 is applied to a pot-type water purifier, the flow rate may not be sufficient and it may take time to purify the water.
また、ポット型浄水器は、前記したように浄水カートリッジの上側に原水貯留部を備えるところ、本発明者等は、円筒状である浄水フィルターの原水が流入する側の側面から活性炭成型体の活性炭が脱落した場合、脱落した活性炭が原水貯留部の水面に浮き上がり、ポット型浄水器のユーザーを不快にさせてしまうことを知得した。 Further, the pot type water purifier is provided with a raw water storage portion on the upper side of the water purification cartridge as described above, and the present inventors have described the activated carbon of the activated carbon molded body from the side surface on the side where the raw water of the cylindrical water purification filter flows in. I learned that if the activated carbon falls off, the activated carbon that has fallen off will float on the surface of the raw water reservoir, making users of pot-type water purifiers uncomfortable.
そこで、本発明は、上記問題を解決し、例えばポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減することに寄与する、浄水カートリッジに関する技術を提供することを主な課題とする。 Therefore, the present invention solves the above problems and contributes to reducing the inflow of the activated carbon that has fallen off into the raw water storage portion while having a sufficient flow rate even when applied to a pot-type water purifier, for example. The main issue is to provide technology related to water purification cartridges.
本発明者等が検討したところ、ポット型浄水器に適用した場合に、充分な流量を有するには、活性炭成型体の前記原水が流入する側の側面に配置される不織布における圧力損失を低減することが有効であることを知得した。しかしながら、本発明者等は、特許文献1の浄水カートリッジにおいて、ポット型浄水器とした場合の流量を高めるべく、円筒体の内周層と外周層としてそれぞれ配置される不織布の密度を低いものとすると、特に原水が流入する側の側面から原水貯留部への活性炭の漏出が多くなりやすくなることを知得した。すなわち、ポット型浄水器に適用する場合、充分な流量を有することと、原水貯留部への活性炭の漏出を低減させることとは、トレードオフの関係となっていることを知得した。 As a result of examination by the present inventors, the pressure loss in the non-woven fabric arranged on the side surface of the activated carbon molded body on the side where the raw water flows is reduced in order to have a sufficient flow rate when applied to a pot type water purifier. I learned that it is effective. However, in the water purification cartridge of Patent Document 1, the present inventors have made the density of the non-woven fabrics arranged as the inner peripheral layer and the outer peripheral layer of the cylindrical body low in order to increase the flow rate in the case of a pot type water purifier. Then, it was found that the leakage of activated carbon from the side surface on the side where the raw water flows into the raw water storage area tends to increase. That is, when applied to a pot-type water purifier, it was found that having a sufficient flow rate and reducing the leakage of activated carbon to the raw water storage section are in a trade-off relationship.
そして、本発明者等が上記課題を解決すべくさらに検討を重ねたところ、活性炭成型体の原水が流入する側の側面に、種々ある不織布の中でも、熱融着性短繊維からなる不織布を配置することにより、初めて、例えばポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減し得ることを見出した。本発明は、これらの知見に基づいて、さらに検討を重ねることにより完成された発明である。 Then, as a result of further studies by the present inventors in order to solve the above problems, a non-woven fabric made of heat-sealing short fibers is arranged on the side surface of the activated carbon molded product on the side where the raw water flows. By doing so, it was found that, for the first time, even when applied to a pot-type water purifier, for example, it has a sufficient flow rate and can reduce the inflow of the fallen activated carbon into the raw water reservoir. The present invention is an invention completed by further studying based on these findings.
すなわち、本発明は、下記に掲げる態様の発明を提供する。
項1.円筒形状である活性炭成型体を備え、原水が該円筒形状における径方向に通水される浄水フィルターであって、前記活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備える、浄水フィルター。
項2.前記熱融着性短繊維の熱融着性成分がポリエステル系樹脂である、項1に記載の浄水フィルター。
項3.前記活性炭成型体が熱融着性短繊維を含む、項1又は2に記載の浄水フィルター。
項4.前記不織布の厚さと目付から算出される見かけ密度が0.08〜0.30g/cm3である、項1〜3のいずれか1項に記載の浄水フィルター。
項5.前記不織布がイオン交換繊維、セルロース系繊維及び動物繊維からなる群より選ばれる1種以上を含む、項1〜4のいずれか1項に記載の浄水フィルター。
項6.前記不織布が無機繊維を含む、項1〜5のいずれか1項に記載の浄水フィルター。
項7.前記活性炭成型体を構成する活性炭が繊維状活性炭である、項1〜6のいずれか1項に記載の浄水フィルター。
項8.項1〜7のいずれか1項に記載の浄水フィルターを備えるポット型浄水器用浄水カートリッジ。
項9.原水が流入する流入部、及び浄水が流出する流出部を有する筒状のケーシングと、前記ケーシングの内部に収容され、前記原水をろ過するための項1〜7のいずれか1項に記載の浄水フィルターと、を備え、前記浄水フィルターは、弾性を有するとともに、空洞部を有する円筒状に形成され、軸方向の両端に、それぞれ第1面及び第2面を有しており、前記ケーシングは、前記浄水フィルターの第1面をカバーする第1カバー部と、前記浄水フィルターの第2面をカバーする第2カバー部と、前記浄水フィルターの外周面を覆う側壁部と、を備え、前記第1カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第1面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第1接触部が形成され、前記第2カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第2面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第2接触部が形成され、前記浄水フィルターは前記第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング内部に収容され、前記ケーシングの前記流入部から流入した前記原水は、前記第1カバー部を介して、前記浄水フィルターの前記空洞部に流入し、当該浄水フィルターを径方向外方に通過して前記浄水フィルターの外周面と前記ケーシングの側壁部との間の空間に流出し、前記流出部から外部に排出されるように構成されている、ポット型浄水器用浄水カートリッジ。
項10.項1〜7のいずれか1項に記載の浄水フィルターを備えるポット型浄水器。
That is, the present invention provides the inventions of the following aspects.
Item 1. A water purification filter having a cylindrically shaped activated carbon molded body through which raw water is passed in the radial direction in the cylindrical shape, and heat-sealing short fibers on the side surface of the activated carbon molded body on the side where the raw water flows. A water purification filter with a non-woven fabric containing.
Item 2. Item 2. The water purification filter according to Item 1, wherein the heat-sealing component of the heat-sealing short fibers is a polyester resin.
Item 3. Item 2. The water purification filter according to Item 1 or 2, wherein the activated carbon molded body contains heat-sealing short fibers.
Item 4. Item 2. The water purification filter according to any one of Items 1 to 3 , wherein the apparent density calculated from the thickness and basis weight of the nonwoven fabric is 0.08 to 0.30 g / cm 3 .
Item 5. Item 2. The water purification filter according to any one of Items 1 to 4, wherein the nonwoven fabric contains at least one selected from the group consisting of ion exchange fibers, cellulosic fibers and animal fibers.
Item 6. Item 2. The water purification filter according to any one of Items 1 to 5, wherein the non-woven fabric contains inorganic fibers.
Item 7. Item 2. The water purification filter according to any one of Items 1 to 6, wherein the activated carbon constituting the activated carbon molded body is fibrous activated carbon.
Item 8. A water purification cartridge for a pot-type water purifier including the water purification filter according to any one of Items 1 to 7.
Item 9. Item 2. The purified water according to any one of Items 1 to 7, which has a tubular casing having an inflow portion into which raw water flows in and an outflow portion from which purified water flows out, and a tubular casing housed inside the casing and for filtering the raw water. The water purification filter includes a filter, and the water purification filter is formed in a cylindrical shape having a cavity as well as being elastic, and has first and second surfaces at both ends in the axial direction, respectively. The first cover portion that covers the first surface of the water purification filter, the second cover portion that covers the second surface of the water purification filter, and the side wall portion that covers the outer peripheral surface of the water purification filter are provided. The cover portion is formed with a first contact portion that periodically contacts the first surface of the water purification filter so as to surround the outer periphery of the cavity portion and presses the water purification filter in the axial direction to elastically deform the second contact portion. The cover portion is formed with a second contact portion that periodically contacts the second surface of the water purification filter so as to surround the outer periphery of the cavity portion and presses the water purification filter in the axial direction to elastically deform the water purification filter. Is housed inside the casing in a state of being elastically deformed by the pressing force of the first contact portion and the second contact portion, and the raw water flowing in from the inflow portion of the casing passes through the first cover portion. , Flows into the cavity of the water purification filter, passes through the water purification filter radially outward, flows out into the space between the outer peripheral surface of the water purification filter and the side wall of the casing, and flows out from the outflow portion to the outside. A water purification cartridge for pot-type water purifiers that is configured to be discharged into the water.
Item 10. A pot-type water purifier including the water purification filter according to any one of Items 1 to 7.
本発明によれば、例えばポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減することに寄与する、浄水カートリッジに関する技術を提供することができる。 According to the present invention, a technique relating to a water purification cartridge that has a sufficient flow rate even when applied to a pot-type water purifier and contributes to reducing the inflow of dropped activated carbon into the raw water storage portion is provided. Can be provided.
本発明の浄水フィルターは、円筒形状である活性炭成型体を備え、原水が該円筒形状における径方向に通水される浄水フィルターであって、前記活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えることを特徴とする。 The water purification filter of the present invention includes an activated carbon molded body having a cylindrical shape, and is a water purification filter through which raw water is passed in the radial direction in the cylindrical shape, and is on the side surface of the activated carbon molded body on the side where the raw water flows. It is characterized by comprising a non-woven fabric containing heat-sealing short fibers.
例えば図1において、浄水フィルター3は、円筒形状である活性炭成型体35と、活性炭成型体35の径方向における内周側に配置される不織布36と、活性炭成型体35の径方向における外周側に配置される不織布37とを備える。図1において、浄水フィルター3は、内部に空洞部を有する。 For example, in FIG. 1, the water purification filter 3 is formed on the activated carbon molded body 35 having a cylindrical shape, the non-woven fabric 36 arranged on the inner peripheral side of the activated carbon molded body 35 in the radial direction, and the outer peripheral side of the activated carbon molded body 35 in the radial direction. It includes a non-woven fabric 37 to be arranged. In FIG. 1, the water purification filter 3 has a hollow portion inside.
円筒形状である本発明の浄水フィルターにおいて、原水及び浄水の通水方向のタイプとしては、in−outタイプと、out−inタイプの2通りが考えられる。図1を参照して説明すると、in−outタイプでは、原水が浄水フィルター2の空洞部に流入し、円筒形状の径方向外周側に向かって、不織布36、活性炭成型体35、不織布37の順に通過することによって浄化され、浄水が不織布37の外面側(不織布37の、活性炭成型体35との接面とは反対の面側)へ排出される。そして、図1に基づき説明すると、本発明の浄水フィルターにおける「活性炭成型体の前記原水が流入する側の側面」とは、in−outタイプの場合は活性炭成型体35の、不織布36との接面に相当し、当該不織布36が熱融着性短繊維からなる不織布である必要がある。 In the water purification filter of the present invention having a cylindrical shape, there are two types of raw water and purified water in the water flow direction, an in-out type and an out-in type. Explaining with reference to FIG. 1, in the in-out type, raw water flows into the cavity of the water purification filter 2, and the non-woven fabric 36, the activated carbon molded body 35, and the non-woven fabric 37 are in this order toward the radial outer peripheral side of the cylindrical shape. It is purified by passing through, and purified water is discharged to the outer surface side of the non-woven fabric 37 (the surface side of the non-woven fabric 37 opposite to the contact surface with the activated carbon molded body 35). Then, to explain based on FIG. 1, the "side surface of the activated carbon molded body on the side where the raw water flows in" in the water purification filter of the present invention is the contact of the activated carbon molded body 35 with the non-woven fabric 36 in the case of the in-out type. The non-woven fabric 36 corresponding to the surface needs to be a non-woven fabric made of heat-sealing short fibers.
また、out−inタイプは、上記in−outタイプと通水方向が逆方向であり、原水が不織布37の外面側(不織布37の、活性炭成型体35との接面とは反対の面側)から流入し、円筒形状の径方向中心方向に、不織布37、活性炭成型体35、不織布36の順に通過することによって浄化され、浄水が空洞部へ排出される。そして、図1に基づき説明すると、本発明の浄水フィルターにおける「活性炭成型体の前記原水が流入する側の側面」とは、out−inタイプの場合は活性炭成型体35の、不織布37との接面に相当し、当該不織布37が熱融着性短繊維からなる不織布である必要がある。 Further, the out-in type has a water flow direction opposite to that of the in-out type, and the raw water is on the outer surface side of the non-woven fabric 37 (the surface side of the non-woven fabric 37 opposite to the contact surface with the activated carbon molded body 35). Purified by passing through the non-woven fabric 37, the activated carbon molded body 35, and the non-woven fabric 36 in this order in the radial center direction of the cylindrical shape, and the purified water is discharged to the cavity. Then, to explain based on FIG. 1, the "side surface of the activated carbon molded body on the side where the raw water flows in" in the water purification filter of the present invention is the contact of the activated carbon molded body 35 with the non-woven fabric 37 in the case of the out-in type. The non-woven fabric 37 corresponding to the surface needs to be a non-woven fabric made of heat-sealing short fibers.
<活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布>
本発明の浄水フィルターは、活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備える。これにより、ポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減することに寄与する、浄水カートリッジに関する技術を提供することができる。
<Non-woven fabric containing heat-sealing short fibers provided on the side surface of the activated carbon molded body on the side where the raw water flows in>
The water purification filter of the present invention includes a non-woven fabric containing heat-sealing short fibers on the side surface of the activated carbon molded product on the side where the raw water flows. As a result, it is possible to provide a technology related to a water purification cartridge that has a sufficient flow rate even when applied to a pot-type water purifier and contributes to reducing the inflow of fallen activated carbon into the raw water storage section. it can.
具体的に、本発明者等は、例えばスパンボンド不織布等の長繊維不織布は、長繊維軸方向が平面方向に多く配列するため、特に原水の流入側に配置した場合に圧力損失が比較的大きくなり、ポット型浄水器に適用した場合に流量に劣ることを知得した。そして、本発明者等は鋭意検討し、熱融着性短繊維を含む不織布とすることで、該短繊維が3次元にランダムに配列し、さらに熱融着性繊維に熱処理を加えることで熱融着繊維は比較的硬い状態で、かつ繊維軸方向が一部厚さ方向に配向した状態で不織布内に存在することとなる結果、例えばポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減し得ることを見出したのである。 Specifically, the present inventors have stated that, for example, long-fiber non-woven fabrics such as spunbonded non-woven fabrics have a large number of long-fiber axial directions arranged in the plane direction, so that the pressure loss is relatively large especially when they are arranged on the inflow side of raw water. It was found that the flow rate was inferior when applied to a pot-type water purifier. Then, the present inventors diligently studied, and by forming a non-woven fabric containing heat-sealing short fibers, the short fibers are randomly arranged three-dimensionally, and further heat is applied to the heat-sealing fibers to generate heat. As a result of the fused fibers being present in the non-woven fabric in a relatively hard state and a state in which the fiber axial direction is partially oriented in the thickness direction, a sufficient flow rate is obtained even when applied to a pot-type water purifier, for example. It was found that the inflow of the fallen activated carbon into the raw water reservoir can be reduced.
熱融着性短繊維は、熱融着性成分を含む。熱融着性成分としては、融点(融点が存在しないものは軟化点、以下同じ。)が80〜170℃のものが好ましく、80〜140℃であるものがより好ましい。熱融着性成分の具体例としては、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、イソフタル酸等共重合成分が共重合した共重合ポリエチレンテレフタレート等のポリエステル系樹脂が挙げられる。中でも、親水性が比較的高く、水なじみ性がより良好となることで、ポット型浄水器に適用した場合の流量、特に浄水フィルターとしての使用開始時における流量がより向上するという観点から、熱融着性成分はポリエステル系が好ましく、イソフタル酸が共重合されたポリエチレンテレフタレートとすることがより好ましい。なお、本発明において、融点とは、示差走査型熱量計(パーキンエルマー社製DSC7)を用い、昇温速度20℃/分で測定した融解吸収曲線の極値を与える温度を融点とする。 The heat-sealing short fibers contain a heat-sealing component. As the heat-sealing component, a melting point (a softening point having no melting point, the same applies hereinafter) is preferably 80 to 170 ° C, and more preferably 80 to 140 ° C. Specific examples of the heat-sealing component include polyolefin-based resins such as polyethylene and polypropylene, and polyester-based resins such as copolymerized polyethylene terephthalate in which a copolymerization component such as isophthalic acid is copolymerized. Above all, heat is relatively high and has better water compatibility, so that the flow rate when applied to a pot-type water purifier, especially the flow rate at the start of use as a water purification filter, is further improved. The hydrophilic component is preferably polyester-based, and more preferably polyethylene terephthalate in which isophthalic acid is copolymerized. In the present invention, the melting point is defined as a temperature that gives an extreme value of a melting absorption curve measured at a heating rate of 20 ° C./min using a differential scanning calorimeter (DSC7 manufactured by PerkinElmer).
熱融着性短繊維は、単一の熱融着性成分のみから構成される全融タイプ、又は鞘部に熱融着性成分、芯部に、融点が鞘部の融点よりも好ましくは20℃以上、より好ましくは30℃以上高い合成樹脂成分を配した、芯鞘型の熱融着性短繊維が挙げられる。中でも、浄水フィルターの強度、とりわけ後述する活性炭成型体を繊維状活性炭を含むものとした場合の浄水フィルターの強度、をより高めるという観点から、芯鞘型の熱融着性短繊維とすることが好ましい。芯鞘型の熱融着性短繊維とする場合、芯成分としては特に制限されないが、例えば、融点が150〜300℃、より好ましくは200〜300℃であって、融点が鞘部の融点よりも20℃以上高い合成樹脂成分が挙げられる。上記合成樹脂成分の具体例としては、ポリエチレンテレフタレートが挙げられる。 The heat-sealing short fibers are a Zen'yu type composed of only a single heat-sealing component, or a heat-sealing component in the sheath and a melting point in the core, preferably 20 than the melting point in the sheath. Examples thereof include a core-sheath type heat-sealing short fiber in which a synthetic resin component having a temperature higher than ° C., more preferably 30 ° C. or higher is arranged. Above all, from the viewpoint of further increasing the strength of the water purification filter, particularly the strength of the water purification filter when the activated carbon molded body described later contains fibrous activated carbon, it is possible to use a core-sheath type heat-sealing short fiber. preferable. In the case of a core-sheath type heat-sealing short fiber, the core component is not particularly limited, but for example, the melting point is 150 to 300 ° C., more preferably 200 to 300 ° C., and the melting point is higher than the melting point of the sheath portion. Also includes synthetic resin components having a temperature higher than 20 ° C. Specific examples of the synthetic resin component include polyethylene terephthalate.
熱融着性短繊維の繊維長の具体例としては、例えば、1〜100mmが挙げられ、10〜80mmが好ましく挙げられる。また、熱融着性短繊維の繊維径としては、例えば、1〜30μmが挙げられ、10〜25μmが好ましく挙げられる。また、熱融着性短繊維の繊度としては、例えば0.1〜20dtexが挙げられ、より好ましくは1〜10dtexが挙げられる。 Specific examples of the fiber length of the heat-sealing short fibers include, for example, 1 to 100 mm, preferably 10 to 80 mm. Further, as the fiber diameter of the heat-sealing short fiber, for example, 1 to 30 μm is mentioned, and 10 to 25 μm is preferably mentioned. The fineness of the heat-sealing short fiber is, for example, 0.1 to 20 dtex, more preferably 1 to 10 dtex.
本発明の浄水フィルターにおいて、活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布は、該熱融着性短繊維のみからなるものとすることができる。これにより、浄水フィルターの強度、特に後述する活性炭成型体を繊維状活性炭を含むものとした場合の浄水フィルターの強度、をより一層高めることができる。一方で、熱融着性短繊維を含む不織布は、該熱融着性短繊維以外の他の成分を含むことができる。活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布において、熱融着性短繊維の含有量としては、特に制限されないが、例えば、5〜100質量%が挙げられ、20〜100質量%が挙げられ、30〜100質量%が挙げられる。 In the water purification filter of the present invention, the non-woven fabric containing the heat-sealing short fibers provided on the side surface of the activated carbon molded product on the side where the raw water flows can be made of only the heat-sealing short fibers. As a result, the strength of the water purification filter, particularly the strength of the water purification filter when the activated carbon molded body described later contains fibrous activated carbon, can be further increased. On the other hand, the non-woven fabric containing the heat-sealing short fibers can contain components other than the heat-sealing short fibers. The content of the heat-sealing short fibers in the nonwoven fabric containing the heat-sealing short fibers provided on the side surface of the activated charcoal molded product on the side where the raw water flows in is not particularly limited, but is, for example, 5 to 100% by mass. 20 to 100% by mass, and 30 to 100% by mass.
上記熱融着性短繊維以外の他の成分としては、無機繊維が挙げられる。無機繊維としては、例えば、ガラス繊維、炭素繊維、繊維状活性炭、キレート繊維、ロックウール、アルミナ繊維、チタニア繊維等が挙げられる。上記繊維は、熱融着性短繊維を含む不織布において骨材として機能し、該不織布の嵩高性をより向上させるのに寄与する。無機繊維の中でも、繊維状活性炭が好ましい。繊維状活性炭とする場合、メソ細孔率が好ましくは10%以下、より好ましくは6%以下で、かつ、比表面積が好ましくは1000m2/g以下、より好ましくは900m2/g以下の繊維状活性炭とすると、活性炭の強度が高まり、骨材としての機能がより一層高まる。 Examples of the components other than the heat-sealing short fibers include inorganic fibers. Examples of the inorganic fiber include glass fiber, carbon fiber, fibrous activated charcoal, chelate fiber, rock wool, alumina fiber, titania fiber and the like. The fibers function as an aggregate in a non-woven fabric containing heat-sealing short fibers, and contribute to further improving the bulkiness of the non-woven fabric. Among the inorganic fibers, fibrous activated carbon is preferable. In the case of fibrous activated carbon, the mesopore ratio is preferably 10% or less, more preferably 6% or less, and the specific surface area is preferably 1000 m 2 / g or less, more preferably 900 m 2 / g or less. When activated carbon is used, the strength of the activated carbon is increased, and the function as an aggregate is further enhanced.
なお、本発明において、細孔容積とは、QSDFT法(急冷固体密度汎関数法)によって算出される細孔容積をいう。QSDFT法とは、幾何学的・化学的に不規則なミクロポーラス・メソポーラスな炭素の細孔径解析を対象とした、約0.5nm〜約40nmまでの細孔径分布の計算ができる解析手法である。QSDFT法では、細孔表面の粗さと不均一性による影響が明瞭に考慮されているため、細孔径分布解析の正確さが大幅に向上した手法である。本発明においては、Quantachrome社製「AUTOSORB−1−MP」を用いて窒素吸着等温線の測定、及びQSDFT法による細孔径分布解析をおこなう。77Kの温度において測定した窒素の脱着等温線に対し、Calculation modelとしてN2 at 77K on carbon[slit pore,QSDFT equilibrium model]を適用して細孔径分布を計算することで、特定の細孔径範囲の細孔容積を算出することができる。そして、活性炭の全細孔容積(m2/g)は、上記QSDFT法によって測定され、具体的には測定した窒素脱着等温線に対し、Calculation modelとしてN2 at 77K on carbon[slit pore,QSDFT equilibrium model]を適用して細孔径分布を計算することで、解析する。また、同様に、細孔径が2nm以下である細孔容積(m2/g)、細孔径が50nm以下の細孔容積についても、上記QSDFT法により、細孔径分布図の横軸Pore Widthが0.65nmにおけるCumulative Pore Volume(cc/g)の読み取り値から求める。そして、メソ細孔率は、上記細孔径が50nm以下の細孔容積から上記細孔径が2nm以下の上記全細孔容積を減ずることにより細孔径2〜50nmの細孔容積を算出し、当該細孔径が2〜50nmの細孔容積を、上記全細孔容積で除して、100を乗ずることにより、メソ細孔率(%)を求める。また、活性炭の比表面積は、Quantachrome社製「AUTOSORB−1−MP」を用いて77Kにおける窒素吸着等温線より、BET法によって相対圧0.1の測定点から計算する。 In the present invention, the pore volume refers to the pore volume calculated by the QSDFT method (quenching solid density functional theory). The QSDFT method is an analysis method that can calculate the pore size distribution from about 0.5 nm to about 40 nm, targeting the pore size analysis of geometrically and chemically irregular microporous and mesoporous carbon. .. In the QSDFT method, the influence of the roughness and non-uniformity of the pore surface is clearly taken into consideration, so that the accuracy of the pore diameter distribution analysis is greatly improved. In the present invention, the nitrogen adsorption isotherm is measured using "AUTOSORB-1-MP" manufactured by Quantachrome, and the pore size distribution is analyzed by the QSDFT method. By applying N2 at 77K on carbon [slit pore, QSDFT equilibrium model] as the Calcation model to the nitrogen desorption isotherm measured at a temperature of 77K, the pore size distribution is calculated to reduce the specific pore size range. The hole volume can be calculated. The total pore volume (m 2 / g) of the activated carbon was measured by the above-mentioned QSDFT method, and specifically, with respect to the measured nitrogen desorption isotherm, N2 at 77K on carbon [slit pore, QSDFT equilibrium] was used as a calculation model. Model] is applied to calculate the pore size distribution for analysis. Similarly, for the pore volume (m 2 / g) having a pore diameter of 2 nm or less and the pore volume having a pore diameter of 50 nm or less, the horizontal axis Pore Wide of the pore diameter distribution map is 0 by the above QSDFT method. Obtained from the reading of Cumulative Poros Volume (cc / g) at .65 nm. Then, the mesopore ratio is calculated by subtracting the total pore volume having a pore diameter of 2 nm or less from the pore volume having a pore diameter of 50 nm or less to calculate the pore volume having a pore diameter of 2 to 50 nm. The mesopore ratio (%) is obtained by dividing the pore volume having a pore diameter of 2 to 50 nm by the total pore volume and multiplying by 100. The specific surface area of the activated carbon is calculated from the measurement point of the relative pressure of 0.1 by the BET method from the nitrogen adsorption isotherm at 77K using "AUTOSORB-1-MP" manufactured by Quantachrome.
また、熱融着性短繊維以外の他の成分として、イオン交換繊維、セルロース系繊維及び動物繊維からなる群より選ばれる1種以上が挙げられる。これらの繊維は、熱融着性短繊維を含む不織布において、親水性を向上させるのに寄与し、ポット型浄水器に適用した場合に流量をより多くすることに寄与する。セルロース系繊維としては、木綿や、リネン、ラミーなどの麻繊維、ビスコースレーヨン、銅アンモニアレーヨンなどの再生繊維、リヨセルなどの溶剤紡糸セルロース繊維などが挙げられる。動物繊維としては、羊毛、アンゴラ、カシミヤ、シルク、アルパカ等が挙げられる。中でも、イオン交換繊維が好ましい。イオン交換繊維としては、弱酸型が好ましく、末端官能基がCa若しくはNaで置換されたポリアクリレート系イオン交換繊維が挙げられる。 In addition, as the component other than the heat-sealing short fiber, one or more selected from the group consisting of ion exchange fiber, cellulosic fiber and animal fiber can be mentioned. These fibers contribute to improving the hydrophilicity of the non-woven fabric containing the heat-sealing short fibers, and contribute to increasing the flow rate when applied to a pot-type water purifier. Examples of cellulosic fibers include cotton, hemp fibers such as linen and ramie, regenerated fibers such as viscose rayon and copper ammonia rayon, and solvent-spun cellulose fibers such as lyocell. Examples of animal fibers include wool, angora, cashmere, silk, alpaca and the like. Of these, ion exchange fibers are preferable. The ion exchange fiber is preferably a weak acid type, and examples thereof include a polyacrylate-based ion exchange fiber in which the terminal functional group is replaced with Ca or Na.
熱融着性短繊維を含む不織布の形態としては、特に制限されないが、嵩高性をより一層与え、ポット型浄水器に適用した場合にも、流量をより大きくし、かつ、脱落した活性炭の原水貯留部への流入をより低減させるという観点から、ニードルパンチ不織布とすることが好ましい。 The form of the non-woven fabric containing the heat-sealing short fibers is not particularly limited, but the bulkiness is further increased, and even when applied to a pot-type water purifier, the flow rate is increased and the raw water of the activated carbon that has fallen off is increased. From the viewpoint of further reducing the inflow to the storage portion, it is preferable to use a needle punched non-woven fabric.
熱融着性短繊維を含む不織布の目付としては、ポット型浄水器に適用した場合にも、流量をより多くし、かつ、脱落した活性炭の原水貯留部への流入をより低減させるという観点から、10〜100g/m2が好ましく、20〜80g/m2がより好ましい。また、熱融着性短繊維を含む不織布の厚さとしては、ポット型浄水器に適用した場合にも、流量をより大きくし、かつ、脱落した活性炭の原水貯留部への流入をより低減させるという観点から、0.05〜1.0mmが好ましく、0.08〜0.6mmがより好ましい。また、熱融着性短繊維を含む不織布の、上記目付と上記厚さから算出される見かけ密度としては、0.05〜0.4g/cm3が好ましく、0.08〜0.3g/cm3がより好ましい。なお、上記見かけ密度は、次のように計算される。
見かけ密度(g/cm3)=目付(g/m2)/厚さ(mm)/1000
The texture of the non-woven fabric containing heat-sealing short fibers is from the viewpoint of increasing the flow rate and further reducing the inflow of the fallen activated carbon into the raw water storage section even when applied to a pot-type water purifier. preferably 10~100g / m 2, 20~80g / m 2 is more preferable. In addition, the thickness of the non-woven fabric containing the heat-sealing short fibers increases the flow rate and further reduces the inflow of the fallen activated carbon into the raw water storage section even when applied to a pot-type water purifier. From the viewpoint, 0.05 to 1.0 mm is preferable, and 0.08 to 0.6 mm is more preferable. The apparent density of the non-woven fabric containing the heat-bondable short fibers, which is calculated from the basis weight and the thickness, is preferably 0.05 to 0.4 g / cm 3 , preferably 0.08 to 0.3 g / cm. 3 is more preferable. The apparent density is calculated as follows.
Apparent density (g / cm 3 ) = basis weight (g / m 2 ) / thickness (mm) / 1000
<活性炭成型体の浄水が排出される側の側面に備えられる不織布>
本発明の浄水フィルターは、活性炭成型体の浄水が排出される側の側面に不織布を備えることができる。当該不織布としては、前述した、活性炭成型体の原水が流入する側の側面に備えられる不織布と同様の、熱融着性短繊維を含む不織布としてもよい。また、長繊維又は連続繊維からなる不織布とすることもできる。引裂強度が比較的高く、取り扱い性や加工性がより優れるという観点から、活性炭成型体の浄水が排出される側の側面に備えられる不織布として、長繊維又は連続繊維からなる不織布とすることが好ましい。
<Non-woven fabric provided on the side surface of the activated carbon molded body on the side where purified water is discharged>
The water purification filter of the present invention may be provided with a non-woven fabric on the side surface of the activated carbon molded product on the side where purified water is discharged. The non-woven fabric may be a non-woven fabric containing heat-sealing short fibers similar to the above-mentioned non-woven fabric provided on the side surface of the activated carbon molded product on the side where the raw water flows. It can also be a non-woven fabric made of long fibers or continuous fibers. From the viewpoint of relatively high tear strength and excellent handleability and workability, it is preferable to use a non-woven fabric made of long fibers or continuous fibers as the non-woven fabric provided on the side surface of the activated carbon molded product on the side where purified water is discharged. ..
長繊維又は連続繊維からなる不織布としては特に制限されないが、スパンボンド不織布とすることが好ましい。スパンボンド不織布を構成する長繊維または連続繊維としては、鞘部に熱融着性成分、芯部に、融点が鞘部の融点よりも好ましくは20℃以上、より好ましくは30℃以上高い合成樹脂成分を配した、芯鞘型の熱融着性繊維が挙げられる。上記芯鞘型の熱融着性繊維の芯部としては、例えば融点が150〜300℃、より好ましくは200〜300℃であって、融点が鞘部の融点よりも20℃以上高い合成樹脂成分が挙げられ、より具体的には、ポリエチレンテレフタレートが挙げられる。上記芯鞘型の熱融着性繊維の鞘部としては、好ましくは融点が80〜170℃、より好ましくは80〜140℃であるものが挙げられ、より具体的には、ポリプロピレン、ポリエチレン等のオレフィン系樹脂、又はイソフタル酸等共重合成分が共重合した共重合ポリエチレンテレフタレート等のポリエステル系樹脂が挙げられる。中でも、柔軟性及び活性炭成型体に対する熱融着性により優れ、取り扱い性や加工性により優れるという観点から、ポリオレフィン系樹脂が好ましく、ポリエチレンがより好ましい。 The non-woven fabric made of long fibers or continuous fibers is not particularly limited, but a spunbonded non-woven fabric is preferable. As the long fibers or continuous fibers constituting the spunbonded non-woven fabric, a synthetic resin having a heat-sealing component in the sheath and a melting point of 20 ° C. or higher, more preferably 30 ° C. or higher higher than the melting point of the sheath in the core. Examples thereof include core-sheath type heat-sealing fibers in which components are arranged. The core portion of the core-sheath type heat-sealing fiber has, for example, a synthetic resin component having a melting point of 150 to 300 ° C., more preferably 200 to 300 ° C., and a melting point higher than the melting point of the sheath portion by 20 ° C. or more. More specifically, polyethylene terephthalate can be mentioned. Examples of the sheath portion of the core-sheath type heat-sealing fiber preferably have a melting point of 80 to 170 ° C., more preferably 80 to 140 ° C., and more specifically, polypropylene, polyethylene, or the like. Examples thereof include olefin resins and polyester resins such as copolymerized polyethylene terephthalate in which copolymerization components such as isophthalic acid are copolymerized. Among them, polyolefin-based resins are preferable, and polyethylene is more preferable, from the viewpoints of being excellent in flexibility and heat-sealing property to an activated carbon molded body, and excellent in handleability and processability.
活性炭成型体の浄水が排出される側の側面に備えられる不織布の目付としては、流量をより多くし、かつ、脱落した活性炭の流出を抑える観点から、10〜100g/m2が好ましく、20〜80g/m2がより好ましい。活性炭成型体の浄水が排出される側の側面に備えられる不織布の厚さとしては、流量をより多くし、かつ、脱落した活性炭の流出を抑える観点から、0.05〜1.0mmが好ましく、0.08〜0.6mmがより好ましい。活性炭成型体の浄水が排出される側の側面に備えられる不織布の上記目付と上記厚さから算出される見かけ密度としては、0.05〜0.4g/cm3が好ましく、0.08〜0.3g/cm3がより好ましい。 The basis weight of the non-woven fabric provided on the side surface of the activated carbon molded body on the side where the purified water is discharged is preferably 10 to 100 g / m 2 from the viewpoint of increasing the flow rate and suppressing the outflow of the activated carbon that has fallen off. 80 g / m 2 is more preferable. The thickness of the non-woven fabric provided on the side surface of the activated carbon molded body on the side where the purified water is discharged is preferably 0.05 to 1.0 mm from the viewpoint of increasing the flow rate and suppressing the outflow of the activated carbon that has fallen off. More preferably 0.08 to 0.6 mm. The apparent density calculated from the basis weight and the thickness of the non-woven fabric provided on the side surface of the activated carbon molded body on the side where the purified water is discharged is preferably 0.05 to 0.4 g / cm 3 , preferably 0.08 to 0. .3 g / cm 3 is more preferred.
<活性炭成型体>
本発明の浄水フィルターは、円筒形状である活性炭成型体を備える。活性炭成型体に含まれる活性炭としては、粒状活性炭及び/又は繊維状活性炭が挙げられる。ポット型浄水器に適用した場合にも、流量をより大きくし、かつ、脱落した活性炭の原水貯留部への流入をより低減させるという観点から、活性炭成型体に含まれる活性炭としては、繊維状活性炭を含むものとすることが好ましく、繊維状活性炭のみからなるものとすることが好ましい。
<Activated carbon molded body>
The water purification filter of the present invention includes an activated carbon molded body having a cylindrical shape. Examples of the activated carbon contained in the activated carbon molded body include granular activated carbon and / or fibrous activated carbon. Even when applied to a pot-type water purifier, the activated carbon contained in the activated carbon molded body is a fibrous activated carbon from the viewpoint of increasing the flow rate and further reducing the inflow of the dropped activated carbon into the raw water reservoir. It is preferable that the material contains only fibrous activated carbon.
活性炭成型体に含まれる活性炭としては、ポット型浄水器に適用した場合の流量をより大きくすべく活性炭成型体の肉厚を可能な限り薄いものとした場合にも、トリハロメタン等の揮発性有機化合物の除去性能を担保しやすくする観点から、メソ細孔率が5〜60%が好ましく、10〜60%がより好ましく、20〜60%がさらに好ましい。また、同様の観点から、当該活性炭の比表面積としては、1000〜1800m2/gが好ましく、1000〜1600m2/gがより好ましい。一方で、活性炭成型体に含まれる活性炭を上記メソ細孔率の範囲である活性炭、とりわけ上記メソ細孔率の範囲である繊維状活性炭とする場合、比較的大きな細孔が多くなることから、活性炭自体の強度が比較的低いものとなりやすく、活性炭が脱落しやすくなる傾向がある。しかしながら、本発明の浄水フィルターにおいては、活性炭成型体の原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えることから、活性炭成型体を上記メソ細孔率である活性炭を含むものとしてポット型浄水器に適用した場合にも、脱落した活性炭の原水貯留部への流入を低減し得る。換言すれば、本発明の浄水フィルターにおいて、活性炭成型体を上記メソ細孔率である活性炭を含むものとしてポット型浄水器に適用した場合には、活性炭成型体の原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えることによる技術的意義がより大きいものになるといえる。 The activated carbon contained in the activated carbon molded body is a volatile organic compound such as trihalomethane even when the wall thickness of the activated carbon molded body is made as thin as possible in order to increase the flow rate when applied to a pot-type water purifier. From the viewpoint of facilitating the removal performance of the above, the mesopore ratio is preferably 5 to 60%, more preferably 10 to 60%, still more preferably 20 to 60%. From the same viewpoint, the specific surface area of the activated carbon, preferably 1000~1800m 2 / g, 1000~1600m 2 / g is more preferable. On the other hand, when the activated carbon contained in the activated carbon molded body is an activated carbon having a mesopore ratio range, particularly a fibrous activated carbon having a mesopore ratio range, relatively large pores are increased. The strength of the activated carbon itself tends to be relatively low, and the activated carbon tends to fall off easily. However, in the water purification filter of the present invention, since the non-woven fabric containing the heat-sealing short fibers is provided on the side surface of the activated carbon molded body on the side where the raw water flows, the activated carbon molded body is provided with the activated carbon having the mesopore ratio. Even when applied to a pot-type water purifier as a inclusion, the inflow of fallen activated carbon into the raw water reservoir can be reduced. In other words, in the water purification filter of the present invention, when the activated carbon molded product is applied to the pot type water purifier as containing the activated carbon having the mesopore ratio, it is on the side surface of the activated carbon molded product on the side where the raw water flows. It can be said that the technical significance of providing the non-woven fabric containing the heat-bondable short fibers becomes greater.
本発明の浄水フィルターにおいて、活性炭成型体は、活性炭以外の他の成分を含むことができる。上記他の成分として、熱融着性短繊維が挙げられる。活性炭成型体にも熱融着性短繊維を含有させることにより、活性炭成型体の原水が流入する側の側面に備えられる不織布、及び活性炭成型体の浄水が排出される側の側面に備えられる不織布との熱融着性がより一層向上する。熱融着性短繊維を含む活性炭成型体は、活性炭が、熱融着性成分によって互いに溶融接着されて形状保持された状態となる。当該熱融着性短繊維に含まれる熱融着性成分としては、融点が80〜170℃のものが好ましく、80〜140℃であるものがより好ましい。熱融着性成分の具体例としては、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、イソフタル酸等共重合成分が共重合した共重合ポリエチレンテレフタレート等のポリエステル系樹脂が挙げられる。また、活性炭成型体に含み得る熱融着性短繊維として、単一の熱融着性成分のみから構成される全融タイプ、又は鞘部に熱融着性成分、芯部に、融点が鞘部の融点よりも好ましくは20℃以上、より好ましくは30℃以上高い合成樹脂成分を配した、芯鞘型の熱融着性短繊維が挙げられる。中でも、浄水フィルターの強度、とりわけ活性炭成型体を繊維状活性炭を含むものとした場合の浄水フィルターの強度、をより高めるという観点から、芯鞘型の熱融着性短繊維とすることが好ましい。芯鞘型の熱融着性短繊維とする場合、芯成分としては特に制限されないが、例えば、融点が150〜300℃、より好ましくは200〜300℃であって、融点が鞘部の融点よりも20℃以上高い合成樹脂成分が挙げられる。上記合成樹脂成分の具体例としては、ポリエチレンテレフタレートが挙げられる。また、活性炭成型体の原水が流入する側の側面に備えられる不織布に含有される熱融着性短繊維の熱融着性成分と、活性炭成型体に含有される熱融着性短繊維の熱融着性成分とを同種のものとすることが好ましい。ここで、同種とは、例えば、一方がポリエスエル系であれば他方もポリエスエル系であることを示す。 In the water purification filter of the present invention, the activated carbon molded body can contain components other than activated carbon. Examples of the other components include heat-sealing short fibers. By incorporating heat-sealing short fibers in the activated carbon molded body, the non-woven fabric provided on the side surface on the side where the raw water of the activated carbon molded body flows in and the non-woven fabric provided on the side surface on the side where the purified water of the activated carbon molded body is discharged. The heat-sealing property with and is further improved. In the activated carbon molded body containing the heat-sealing short fibers, the activated carbon is melt-bonded to each other by the heat-sealing component to maintain its shape. As the heat-sealing component contained in the heat-sealing short fiber, one having a melting point of 80 to 170 ° C. is preferable, and one having a melting point of 80 to 140 ° C. is more preferable. Specific examples of the heat-sealing component include polyolefin-based resins such as polyethylene and polypropylene, and polyester-based resins such as copolymerized polyethylene terephthalate in which a copolymerization component such as isophthalic acid is copolymerized. Further, as the heat-sealing short fibers that can be contained in the activated charcoal molded body, a Zen'yu type composed of only a single heat-sealing component, or a heat-sealing component in the sheath and a melting point in the core are sheathed. Examples thereof include a core-sheath type heat-sealing short fiber in which a synthetic resin component having a temperature higher than the melting point of the portion is preferably 20 ° C. or higher, more preferably 30 ° C. or higher. Above all, from the viewpoint of further increasing the strength of the water purification filter, particularly the strength of the water purification filter when the activated carbon molded product contains fibrous activated carbon, it is preferable to use core-sheath type heat-sealing short fibers. In the case of a core-sheath type heat-sealing short fiber, the core component is not particularly limited, but for example, the melting point is 150 to 300 ° C., more preferably 200 to 300 ° C., and the melting point is higher than the melting point of the sheath portion. Also includes synthetic resin components having a temperature higher than 20 ° C. Specific examples of the synthetic resin component include polyethylene terephthalate. Further, the heat-sealing component of the heat-sealing short fibers contained in the non-woven fabric provided on the side surface of the activated carbon molded body on the side where the raw water flows in, and the heat of the heat-sealing short fibers contained in the activated carbon molded body. It is preferable that the fusing component is of the same type. Here, the same type means, for example, that if one is a Polysell system, the other is a Polysuel system.
また、活性炭成型体における活性炭以外の他の成分として、パルプが挙げられる。パルプは、活性炭成型体において、機械的強度をより向上させるのに寄与する。パルプとしては、濾水度が1〜300、好ましくは10〜200が挙げられる。パルプの繊維長としては、0.1〜3mmが挙げられる。パルプの具体例としては、アクリル系パルプ、ポリオレフィン系パルプ、アラミド系パルプ、木質パルプ、麻パルプ等が挙げられる。 In addition, as a component other than activated carbon in the activated carbon molded body, pulp can be mentioned. Pulp contributes to further improving the mechanical strength of the activated carbon molded product. Examples of the pulp have a drainage degree of 1 to 300, preferably 10 to 200. The fiber length of the pulp is 0.1 to 3 mm. Specific examples of pulp include acrylic pulp, polyolefin pulp, aramid pulp, wood pulp, hemp pulp and the like.
また、活性炭成型体における活性炭以外の他の成分として、イオン交換繊維が挙げられる。イオン交換繊維としては、弱酸型が好ましく、末端官能基がCa若しくはNaで置換されたポリアクリレート系イオン交換繊維が挙げられる。 Further, as a component other than the activated carbon in the activated carbon molded body, an ion exchange fiber can be mentioned. The ion exchange fiber is preferably a weak acid type, and examples thereof include a polyacrylate-based ion exchange fiber in which the terminal functional group is replaced with Ca or Na.
活性炭成型体の形態としては、円筒形状であれば特に制限されないが、例えば、湿式成型された活性炭成型体、又は活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体が挙げられる。 The form of the activated carbon molded body is not particularly limited as long as it has a cylindrical shape, but for example, a wet-molded activated carbon molded body, or a dry non-woven fabric containing activated carbon or a wet non-woven fabric is molded in a wound state. The body is mentioned.
具体的に、湿式成型された不織布の具体例として、活性炭を含むスラリーを調製し、該スラリーを、多数の吸引用小孔を有する成型用の型枠に流し込み、吸引用小孔を通じて吸引しながら濾過して予備成型体とし、該予備成型体を乾燥する方法(湿式成型法又はスラリー吸引法)により製造される活性炭成型体が挙げられる(以下、「スラリー吸引成型体」と略することがある。)。この場合、得られる活性炭成型体としては、例えば、活性炭が、前述したパルプと絡み合うことにより形状保持されるものが挙げられる。 Specifically, as a specific example of the wet-molded non-woven fabric, a slurry containing activated carbon is prepared, and the slurry is poured into a molding mold having a large number of small suction holes and sucked through the small suction holes. Examples thereof include an activated carbon molded body produced by a method of filtering the preformed body to obtain a preformed body and drying the preformed body (wet molding method or slurry suction method) (hereinafter, may be abbreviated as “slurry suction molded body”). .). In this case, examples of the obtained activated carbon molded product include those in which the activated carbon is entangled with the above-mentioned pulp to maintain its shape.
また、活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体において、乾式不織布としては、エアレイド又はカード法(カードウェブ法)により得られる短繊維構造体による不織布、及び当該不織布にニードルパンチ加工を施して積層一体化したニードルパンチ不織布が挙げられる。また、湿式不織布としては、繊維状炭素材料を含む溶液を、パルパー、ビーター、リファイナーなどの装置を用いて混合、せん断し、均一に分散したスラリーを作製し、得られたスラリーをワイヤー上に流し、脱水、乾燥して得られる、湿式抄紙不織布が挙げられる。 Further, in an activated carbon molded body in which a dry non-woven fabric containing activated carbon or a wet non-woven fabric is molded in a wound state, the dry non-woven fabric is a non-woven fabric made of a short fiber structure obtained by an airlaid or card method (card web method). In addition, a needle punched nonwoven fabric in which the nonwoven fabric is subjected to needle punching and laminated and integrated can be mentioned. As a wet non-woven fabric, a solution containing a fibrous carbon material is mixed and sheared using an apparatus such as a pulper, a beater, or a refiner to prepare a uniformly dispersed slurry, and the obtained slurry is poured onto a wire. , A wet papermaking non-woven fabric obtained by dehydration and drying.
活性炭成型体の質量(g)と体積(=(1/2)×π×{(外径)2−(内径)2}×高さ)から算出される密度としては、0.10〜0.55(g/cm3)が挙げられ、0.15〜0.5(g/cm3)が好ましく挙げられる。 The density calculated from the mass (g) and volume (= (1/2) × π × {(outer diameter) 2- (inner diameter) 2 } × height) of the activated carbon molded body is 0.10 to 0. 55 (g / cm 3 ) is mentioned, and 0.15 to 0.5 (g / cm 3 ) is preferably mentioned.
<浄水フィルター>
図1を参照し、本発明の浄水フィルターの、活性炭成型体35の径方向における内周側に配置される不織布36、活性炭成型体35、活性炭成型体35の径方向における外周側に配置される不織布37、の具体的な組合せの例として、以下が挙げられる。
・in−outタイプ
不織布36:熱融着性短繊維を含む不織布/活性炭成型体35:活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体/不織布37:熱融着性短繊維を含む不織布
不織布36:熱融着性短繊維を含む不織布/活性炭成型体35:活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体/不織布37:長繊維又は連続繊維からなる不織布
・out−inタイプ
不織布36:熱融着性短繊維を含む不織布/活性炭成型体35:活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体/不織布37:熱融着性短繊維を含む不織布
不織布36:長繊維又は連続繊維からなる不織布/活性炭成型体35:活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体/不織布37:熱融着性短繊維を含む不織布
<Water purification filter>
With reference to FIG. 1, the water purification filter of the present invention is arranged on the outer peripheral side of the activated carbon molded body 35 in the radial direction of the non-woven fabric 36, the activated carbon molded body 35, and the activated carbon molded body 35 arranged on the inner peripheral side in the radial direction. Examples of specific combinations of the non-woven fabric 37 include the following.
-In-out type non-woven fabric 36: Non-woven fabric / non-woven fabric containing heat-sealing short fibers 35: Non-woven fabric containing activated charcoal or wet non-woven fabric molded in a wound state 37: Heat Non-woven fabric containing short-sealed fibers 36: Non-woven fabric containing heat-sealed short fibers / activated carbon molded body 35: Dry-type non-woven fabric containing activated charcoal or wet non-woven fabric molded in a wound state / non-woven fabric 37: Non-woven fabric made of long fibers or continuous fibers, out-in type non-woven fabric 36: Non-woven fabric containing heat-sealing short fibers / activated carbon molded body 35: Dry non-woven fabric or wet non-woven fabric containing activated charcoal is molded in a wound state. Activated carbon molded body / non-woven fabric 37: Non-woven fabric containing heat-sealing short fibers 36: Non-woven fabric composed of long fibers or continuous fibers / Activated carbon molded body 35: Dry non-woven fabric or wet non-woven fabric containing activated charcoal is wound. Molded activated charcoal molded body / non-woven fabric 37: Non-woven fabric containing heat-sealing short fibers
浄水フィルターの、円筒形状における高さ(長さ)としては、10〜250mmが挙げられ、20〜150mmが好ましく挙げられる。また、円柱形状における外径としては、20〜100mmが挙げられ、30〜65mmが好ましく挙げられる。また、円柱形状における内径としては、5〜90mmが挙げられ、10〜55mmが好ましく挙げられる。 The height (length) of the water purification filter in a cylindrical shape is preferably 10 to 250 mm, preferably 20 to 150 mm. The outer diameter of the cylindrical shape is 20 to 100 mm, preferably 30 to 65 mm. The inner diameter of the cylindrical shape is 5 to 90 mm, preferably 10 to 55 mm.
本発明の浄水フィルターの製造方法としては、特に制限されない。例えば、活性炭成型体を、繊維状活性炭を含む乾式不織布又は湿式不織布が捲回された状態で成型されている活性炭成型体とする場合は、次のようにして製造することができる。まず、表面に離型処理が施された円柱状の芯を準備する。次に、当該芯に、活性炭成型体35の径方向における内周側に配置される不織布36を所定の厚さとなるように1回又は複数回巻き付ける。次いで、活性炭成型体35とする繊維状活性炭及び熱融着性短繊維を含む乾式不織布又は湿式不織布を、当該不織布36の上に所定の厚さとなるように1回又は複数回巻き付ける。そして、活性炭成型体35の径方向における外周側に配置される不織布37を所定の厚さとなるように1回又は複数回巻き付ける。そして、得られた、前述の芯に、外径側に向かって不織布36、活性炭成型体とする繊維状活性炭を含む乾式不織布又は湿式不織布、不織布37、の順に巻き付けたものを、炉に入れ、熱処理を施して、熱融着性短繊維の熱融着性成分等を溶融させ、冷却し、上記芯を抜き取ることで、空洞部から外周側に向かって不織布36、活性炭成型体35、不織布37を備える、浄水フィルターを得ることができる。 The method for producing the water purification filter of the present invention is not particularly limited. For example, when the activated carbon molded body is a dry non-woven fabric containing fibrous activated carbon or an activated carbon molded body in which a wet non-woven fabric is wound, it can be produced as follows. First, a columnar core whose surface has been subjected to a mold release treatment is prepared. Next, the non-woven fabric 36 arranged on the inner peripheral side in the radial direction of the activated carbon molded body 35 is wound around the core once or a plurality of times so as to have a predetermined thickness. Next, the dry non-woven fabric or the wet non-woven fabric containing the fibrous activated carbon and the heat-sealing short fibers to be the activated carbon molded body 35 is wound once or a plurality of times on the non-woven fabric 36 so as to have a predetermined thickness. Then, the non-woven fabric 37 arranged on the outer peripheral side in the radial direction of the activated carbon molded body 35 is wound once or a plurality of times so as to have a predetermined thickness. Then, a non-woven fabric 36, a dry non-woven fabric or a wet non-woven fabric containing fibrous activated carbon as an activated carbon molded body, and a non-woven fabric 37, which are wound around the above-mentioned core in this order, are placed in a furnace. By performing heat treatment to melt the heat-sealing components of the heat-sealing short fibers, cooling the fibers, and pulling out the core, the non-woven fabric 36, the activated carbon molded body 35, and the non-woven fabric 37 are removed from the cavity toward the outer periphery. A water purification filter can be obtained.
<ポット型浄水器用浄水カートリッジ>
本発明のポット型浄水器用浄水カートリッジは、前述した本発明の浄水フィルターを備える。
<Water purification cartridge for pot type water purifier>
The water purification cartridge for a pot-type water purifier of the present invention includes the water purification filter of the present invention described above.
(A.in−outタイプ)
以下、本発明に係る浄水カートリッジのin−outタイプ(以下、第1実施形態と記載することがある。)について図面を参照しつつ説明する。図2は本実施形態に係る浄水カートリッジ(以下、単にカートリッジと称することがある)1の外観斜視図、図4Aは図2の正面図である。以下では、説明の便宜のため、図4Aの上下方向を「上下」、図4Aの左右方向を「左右」または「水平」、図4Aの紙面方向を「前後」と称し、これを基準に説明を行う。
(A. in-out type)
Hereinafter, the in-out type of the water purification cartridge according to the present invention (hereinafter, may be referred to as the first embodiment) will be described with reference to the drawings. FIG. 2 is an external perspective view of the water purification cartridge (hereinafter, may be simply referred to as a cartridge) 1 according to the present embodiment, and FIG. 4A is a front view of FIG. In the following, for convenience of explanation, the vertical direction of FIG. 4A is referred to as "up and down", the horizontal direction of FIG. 4A is referred to as "left and right" or "horizontal", and the paper direction of FIG. 4A is referred to as "front and back". I do.
<1.浄水カートリッジの概要>
カートリッジ1は、原水が自重によりカートリッジ1を通過するポット型(サーバー型)の浄水器に主として用いられる。図11Aに浄水器の一例を示す。同図に示すように、この浄水器100は、上部に開口S1を有する筐体101を備える。筐体101は、内側に、上部が開口したタンク102を有する。タンク102は、原水を貯留するための部分であり、上部の開口S2からタンク102に原水を注ぐことができる。タンク102の底部には開口S4が形成されており、カートリッジ1は、パッキン104とともに開口S4の周縁部をシールするように取り付けられる。タンク102内の原水は、カートリッジ1内部に流入する。なお、開口S2は、開口S1よりも小さく形成されるため、開口S1は、開口S2と開口S3とに区切られる。
<1. Overview of water purification cartridge>
The cartridge 1 is mainly used in a pot type (server type) water purifier in which raw water passes through the cartridge 1 by its own weight. FIG. 11A shows an example of a water purifier. As shown in the figure, the water purifier 100 includes a housing 101 having an opening S1 at the top. The housing 101 has a tank 102 having an open top inside. The tank 102 is a portion for storing raw water, and raw water can be poured into the tank 102 through the upper opening S2. An opening S4 is formed at the bottom of the tank 102, and the cartridge 1 is attached together with the packing 104 so as to seal the peripheral edge of the opening S4. The raw water in the tank 102 flows into the cartridge 1. Since the opening S2 is formed smaller than the opening S1, the opening S1 is divided into the opening S2 and the opening S3.
原水は、カートリッジ1内部を通過した後、カートリッジ1の下方から浄水として流出し、タンク102の下方のサーバー空間103に貯められる。開口S3は、サーバー空間103から浄水を取り出すための取り出し口として機能する。 After passing through the inside of the cartridge 1, the raw water flows out as purified water from below the cartridge 1 and is stored in the server space 103 below the tank 102. The opening S3 functions as an outlet for taking out purified water from the server space 103.
本実施形態に係るカートリッジ1は、図2〜5に示すように、全体として筒状であり、典型的には略円筒形状の外観を有する。カートリッジ1は、ケーシング2と、このケーシング2の内部に収容される略円筒状の浄水フィルター3とを備える。本実施形態のカートリッジ1は、浄水フィルター3の空洞部に流入した原水が、径方向外方に浄水フィルター3を通過し、浄水フィルター3の外周面とケーシング2の側壁部との間の空間に流出する、in−outタイプのカートリッジである。なお、図2〜11Bにおいて、浄水フィルター3における、円筒形状である活性炭成型体35と、活性炭成型体35の径方向における内周側に配置される不織布36と、活性炭成型体35の径方向における外周側に配置される不織布37は図示を省略する。 As shown in FIGS. 2 to 5, the cartridge 1 according to the present embodiment has a tubular shape as a whole, and typically has a substantially cylindrical appearance. The cartridge 1 includes a casing 2 and a substantially cylindrical water purification filter 3 housed inside the casing 2. In the cartridge 1 of the present embodiment, the raw water that has flowed into the hollow portion of the water purification filter 3 passes through the water purification filter 3 radially outward, and enters the space between the outer peripheral surface of the water purification filter 3 and the side wall portion of the casing 2. It is an in-out type cartridge that flows out. In FIGS. 2 to 11B, the activated carbon molded body 35 having a cylindrical shape in the water purification filter 3, the non-woven fabric 36 arranged on the inner peripheral side in the radial direction of the activated carbon molded body 35, and the activated carbon molded body 35 in the radial direction. The non-woven fabric 37 arranged on the outer peripheral side is not shown.
浄水フィルター3は、原水をろ過して浄水とするための部材である。図3に示すように、浄水フィルター3は中央に上面視略円形の空洞部34を有し、軸方向の両端に第1面31と第2面33とをそれぞれ有する。第1面31及び第2面33に連続し、軸方向に延びる浄水フィルター3の部分を、側周部32と称する。浄水フィルター3は、第1面31が上方に、第2面33が下方に向くような向きでケーシング2に収容される。この状態を収容状態と称する。浄水フィルター3の外径は、ケーシング2の側壁部21の内径よりも小さくなるように構成される。これにより、図5に示すように、収容状態において、浄水フィルター3の外周面とケーシング2の側壁部21との間に環状の空間230が形成される。 The water purification filter 3 is a member for filtering raw water into purified water. As shown in FIG. 3, the water purification filter 3 has a hollow portion 34 having a substantially circular top view in the center, and has a first surface 31 and a second surface 33 at both ends in the axial direction, respectively. The portion of the water purification filter 3 that is continuous with the first surface 31 and the second surface 33 and extends in the axial direction is referred to as a side peripheral portion 32. The water purification filter 3 is housed in the casing 2 so that the first surface 31 faces upward and the second surface 33 faces downward. This state is called a containment state. The outer diameter of the water purification filter 3 is configured to be smaller than the inner diameter of the side wall portion 21 of the casing 2. As a result, as shown in FIG. 5, an annular space 230 is formed between the outer peripheral surface of the water purification filter 3 and the side wall portion 21 of the casing 2 in the accommodation state.
第1カバー部20は、略円筒形状の側壁部200と、側壁部200に囲まれた流入部207とを有する。流入部207は、タンク102とカートリッジ1内とを連通させる部分である。すなわち、タンク102内の原水は、流入部207を介してカートリッジ1の内部に流入する。図5に示すように、流入部207は、側壁部200から連続し、下方へ窪んだ平底容器状に形成され、ケーシング2の内部空間に対向する面203を有する。収容状態における第1カバー部20は、面203において、浄水フィルター3の第1面31に密着することができる。特に、本発明に係る浄水カートリッジは、後述するように浄水フィルター3が第1カバー部20の第1接触部及び第2カバー部22の第2接触部の押圧力により弾性変形された状態で前記ケーシング2内部に収容される。この構成により、浄水フィルターとケーシング及び蓋体との間に弾性部材を介さずとも浄水フィルター3の空洞部34に流入した原水が、第1面31と第1カバー部20との隙間、及び第2面33と第2カバー部22との隙間を通過するのを防止することができ、原水が浄水フィルター3を通過するのを促進することができる。面203の中央には、原水がカートリッジ1内へ流入するための円形の貫通孔207aが形成される。収容状態において、浄水フィルター3の空洞部34は、貫通孔207aの概ね直下に位置し、原水は、貫通孔207aから浄水フィルター3の空洞部34に流入する。 The first cover portion 20 has a substantially cylindrical side wall portion 200 and an inflow portion 207 surrounded by the side wall portion 200. The inflow portion 207 is a portion that communicates the tank 102 with the inside of the cartridge 1. That is, the raw water in the tank 102 flows into the inside of the cartridge 1 through the inflow portion 207. As shown in FIG. 5, the inflow portion 207 is formed in the shape of a flat-bottomed container continuous from the side wall portion 200 and recessed downward, and has a surface 203 facing the internal space of the casing 2. The first cover portion 20 in the housed state can be brought into close contact with the first surface 31 of the water purification filter 3 on the surface 203. In particular, the water purification cartridge according to the present invention is described in a state in which the water purification filter 3 is elastically deformed by the pressing force of the first contact portion of the first cover portion 20 and the second contact portion of the second cover portion 22, as will be described later. It is housed inside the casing 2. With this configuration, the raw water that has flowed into the cavity 34 of the water purification filter 3 without an elastic member between the water purification filter and the casing and the lid is allowed to flow into the gap between the first surface 31 and the first cover portion 20 and the first cover portion 20. It is possible to prevent the raw water from passing through the gap between the two surfaces 33 and the second cover portion 22, and it is possible to promote the raw water from passing through the water purification filter 3. A circular through hole 207a for allowing raw water to flow into the cartridge 1 is formed in the center of the surface 203. In the housed state, the cavity 34 of the water purification filter 3 is located substantially directly below the through hole 207a, and the raw water flows into the cavity 34 of the water purification filter 3 from the through hole 207a.
側壁部200は、面203の形成される位置から上下方向に延びるよう形成される。側壁部200の外側であって、貫通孔207aよりも上の位置には、カートリッジ1が開口S4の周縁部に取り付けられるためのフランジ204が形成される。また、フランジ204の上下方向の中心には、周方向に延びる溝210が形成される。溝210は、カートリッジ1が開口S4の周縁部に取り付けられる際に、カートリッジ1と開口S4の周縁部との隙間をシールするパッキン104が嵌められるための部分である。 The side wall portion 200 is formed so as to extend in the vertical direction from the position where the surface 203 is formed. A flange 204 is formed on the outside of the side wall portion 200 and above the through hole 207a for attaching the cartridge 1 to the peripheral edge portion of the opening S4. Further, a groove 210 extending in the circumferential direction is formed at the center of the flange 204 in the vertical direction. The groove 210 is a portion for fitting the packing 104 that seals the gap between the cartridge 1 and the peripheral edge of the opening S4 when the cartridge 1 is attached to the peripheral edge of the opening S4.
側壁部200のフランジ204よりも下で、かつ面203よりも上の位置には、通気口205が形成される。通気口205は、サーバー空間103とケーシング2内部とを連通させる。原水がカートリッジ1内に流入すると、カートリッジ1(ケーシング2)内部の空気が通気口205を介して排出されるため、カートリッジ1を通過する水の動きがよりスムーズになる。通気口205は、カートリッジ1が開口S4の周縁部に取り付けられた状態においてタンク102の外部に位置し、かつ浄水フィルター3の第1面31よりも上方に位置するように配置される。 A vent 205 is formed at a position below the flange 204 of the side wall portion 200 and above the surface 203. The vent 205 communicates the server space 103 with the inside of the casing 2. When the raw water flows into the cartridge 1, the air inside the cartridge 1 (casing 2) is discharged through the vent 205, so that the movement of the water passing through the cartridge 1 becomes smoother. The vent 205 is arranged so as to be located outside the tank 102 in a state where the cartridge 1 is attached to the peripheral edge of the opening S4 and above the first surface 31 of the water purification filter 3.
図3に示すように、側壁部200の外側であって通気口205よりも下の位置には、側壁部200の厚みが他の部分より薄い薄肉領域Rが形成される。薄肉領域R上には、径方向外側に突出する略四角形の爪部206が、周方向に間隔を空けて複数形成される。爪部206は、後述する第2カバー部22の窓部222と係合することにより、第1カバー部20と第2カバー部22とを連結可能にする。なお、爪部206と窓部222とによる連結手段は、あくまでも第1カバー部20と第2カバー部との連結手段の一例として挙げたものであり、連結手段は特にこれに限定されず、他の例として、例えば、溶着若しくは接着による連結、又はネジ嵌合による連結等が挙げられる。 As shown in FIG. 3, a thin region R having a thickness of the side wall portion 200 thinner than the other portions is formed at a position outside the side wall portion 200 and below the vent 205. On the thin-walled region R, a plurality of substantially quadrangular claw portions 206 protruding outward in the radial direction are formed at intervals in the circumferential direction. The claw portion 206 makes it possible to connect the first cover portion 20 and the second cover portion 22 by engaging with the window portion 222 of the second cover portion 22, which will be described later. The connecting means by the claw portion 206 and the window portion 222 is given as an example of the connecting means between the first cover portion 20 and the second cover portion, and the connecting means is not particularly limited to this. Examples of the above are, for example, connection by welding or adhesion, connection by screw fitting, and the like.
図5に示すように、第1カバー部20の面203には、面203からケーシング2の内部空間に向かって突出する環状の第1突部208が形成される。第1突部208は、収容状態では、浄水フィルター3の空洞部34を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる。この場合、第1突部208が、空洞部34の外周を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第1接触部となり得る。本発明の浄水カートリッジにおいて、面203は突部を有さないものでもあり得る。例えば、面203は、平面状であり得る。この場合、面203が、空洞部34の外周を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第1接触部となり得る。第1突部208の断面形状は特に限定されないが、略三角形状、略四角形状、略半円形状、略半楕円形状等が挙げられる。略三角形状、略四角形状の角については、丸みを帯びたものであってもよい。 As shown in FIG. 5, on the surface 203 of the first cover portion 20, an annular first protrusion 208 projecting from the surface 203 toward the internal space of the casing 2 is formed. In the housed state, the first protrusion 208 contacts the first surface 31 of the water purification filter 3 in a ring shape so as to surround the cavity 34 of the water purification filter 3, and presses the water purification filter 3 in the axial direction to elastically deform it. In this case, the first protrusion 208 contacts the first surface 31 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and becomes the first contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. obtain. In the water purification cartridge of the present invention, the surface 203 may not have a protrusion. For example, the surface 203 can be flat. In this case, the surface 203 may be in contact with the first surface 31 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and may be the first contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. The cross-sectional shape of the first protrusion 208 is not particularly limited, and examples thereof include a substantially triangular shape, a substantially quadrangular shape, a substantially semicircular shape, and a substantially semi-elliptical shape. The corners having a substantially triangular shape or a substantially square shape may be rounded.
第2カバー部22は、底部227と、底部227から連続して立ち上がる側壁部220とを有し、全体として略円筒形の外観を有する。図4Dに示すように、底部227の周縁部には、浄水がカートリッジ1外に排出されるための貫通孔223aが周方向に間隔を空けて複数形成される。複数の貫通孔223aをまとめて流出部223と称する。図5に示すように、収容状態において、貫通孔223aは、浄水フィルター3の外周面とケーシング2の側壁部21との間の空間230の概ね直下にそれぞれ位置するように形成される。 The second cover portion 22 has a bottom portion 227 and a side wall portion 220 that continuously rises from the bottom portion 227, and has a substantially cylindrical appearance as a whole. As shown in FIG. 4D, a plurality of through holes 223a for discharging purified water to the outside of the cartridge 1 are formed on the peripheral edge of the bottom portion 227 at intervals in the circumferential direction. The plurality of through holes 223a are collectively referred to as an outflow portion 223. As shown in FIG. 5, in the accommodating state, the through holes 223a are formed so as to be located substantially directly below the space 230 between the outer peripheral surface of the water purification filter 3 and the side wall portion 21 of the casing 2.
図5に示すように、収容状態における第2カバー部22は、面221において浄水フィルター3の第2面33に接触することができる。特に、本発明に係る浄水カートリッジは、後述するように浄水フィルター3が第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング2内部に収容されることから、浄水フィルターとケーシング及び蓋体との間に弾性部材を介さずとも浄水フィルター3の空洞部34に流入した原水が、第1面31と第1カバー部20との隙間、及び第2面33と第2カバー部22との隙間を通過するのを防止することができ、原水が浄水フィルター3を通過するのを促進することができる。ここで、面221は、ケーシング2の内部空間に対向する底部227の面である。面221には、面221からケーシング2の内部空間に向かって突出する環状の第2突部224が形成される。第2突部224は、収容状態では、浄水フィルター3の空洞部34の外周を囲むように環状に浄水フィルター3の第2面33に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる。この場合、第2突部224が、空洞部34の外周を囲むように環状に浄水フィルター3の第2面33に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第2接触部となり得る。また、本発明の浄水カートリッジにおいて、面221は突部を有さないものでもあり得る。例えば、面221は、平面状であり得る。この場合、面221が、空洞部34の外周を囲むように環状に浄水フィルター3の第2面33に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第2接触部となり得る。第2突部224の断面形状は特に限定されないが、略三角形状、略四角形状、略半円形状、略半楕円形状等が挙げられる。略三角形状、略四角形状の角については、丸みを帯びたものであってもよい。 As shown in FIG. 5, the second cover portion 22 in the housed state can come into contact with the second surface 33 of the water purification filter 3 on the surface 221. In particular, in the water purification cartridge according to the present invention, as will be described later, the water purification filter 3 is housed inside the casing 2 in a state of being elastically deformed by the pressing force of the first contact portion and the second contact portion. The raw water that has flowed into the cavity 34 of the water purification filter 3 between the filter, the casing, and the lid without an elastic member enters the gap between the first surface 31 and the first cover portion 20, and the second surface 33 and the second surface 33. 2 It is possible to prevent the raw water from passing through the gap with the cover portion 22, and it is possible to promote the raw water from passing through the water purification filter 3. Here, the surface 221 is the surface of the bottom portion 227 facing the internal space of the casing 2. An annular second protrusion 224 is formed on the surface 221 so as to project from the surface 221 toward the internal space of the casing 2. In the housed state, the second protrusion 224 contacts the second surface 33 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34 of the water purification filter 3, and presses the water purification filter 3 in the axial direction to elastically deform it. .. In this case, the second protrusion 224 is in contact with the second surface 33 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and becomes a second contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. obtain. Further, in the water purification cartridge of the present invention, the surface 221 may not have a protrusion. For example, the surface 221 can be flat. In this case, the surface 221 may be in contact with the second surface 33 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and may be a second contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. The cross-sectional shape of the second protrusion 224 is not particularly limited, and examples thereof include a substantially triangular shape, a substantially quadrangular shape, a substantially semicircular shape, and a substantially semi-elliptical shape. The corners having a substantially triangular shape or a substantially square shape may be rounded.
側壁部220は、第1カバー部20の側壁部200と概ね同じ径の略円筒状に形成される。側壁部220の上部には、爪部206と対応する周方向の位置に、略四角形の開口である窓部222が爪部206と同数だけ形成される。これにより、薄肉領域Rを第2カバー部22の上側から第2カバー部22の内部に差し込み、爪部206と窓部222とを1対1対応させて係合させると、第1カバー部20と第2カバー部22とが連結した連結状態とすることができる。連結状態において、側壁部200及び側壁部220とは概ね面一となり、共にケーシング2の側壁部21を形成する。なお、窓部222と爪部206との係合を外すことで、第1カバー部20から第2カバー部22を取り外すこともできる。つまり、第1カバー部20と第2カバー部22とは、着脱可能に連結することができるし、着脱不能に連結することもできる。 The side wall portion 220 is formed in a substantially cylindrical shape having substantially the same diameter as the side wall portion 200 of the first cover portion 20. At the upper portion of the side wall portion 220, window portions 222, which are substantially quadrangular openings, are formed in the same number as the claw portions 206 at positions in the circumferential direction corresponding to the claw portions 206. As a result, when the thin-walled region R is inserted into the inside of the second cover portion 22 from the upper side of the second cover portion 22 and the claw portion 206 and the window portion 222 are engaged with each other in a one-to-one correspondence, the first cover portion 20 is engaged. And the second cover portion 22 can be connected to each other. In the connected state, the side wall portion 200 and the side wall portion 220 are substantially flush with each other, and both form the side wall portion 21 of the casing 2. The second cover portion 22 can be removed from the first cover portion 20 by disengaging the window portion 222 and the claw portion 206. That is, the first cover portion 20 and the second cover portion 22 can be detachably connected to each other, or can be detachably connected to each other.
第1カバー部20の材料としては、プラスチックが挙げられる。当該プラスチックとしては、ABS樹脂(アクリロニトリルブタジエンスチレン)、PE(ポリエチレン)、PP(ポリプロピレン)、AS樹脂(アクリロニトリルスチレン)、PS(ポリスチレン)、PET(ポリエチレンテレフタレート)、PLA(ポリ乳酸)樹脂製である。より具体的には、ポリプロピレン(PP)、ABS(アクリロニトリルブタジエンスチレン)からなる群から選択される。第1カバー部20の硬度は、95〜100であり、後述する浄水フィルター3の硬度よりも高い。なお、ABS樹脂の硬度は95、ポリプロピレンの硬度は100、ポリエチレンテレフタレート樹脂の硬度は97である。 Examples of the material of the first cover portion 20 include plastic. The plastic is made of ABS resin (acrylonitrile butadiene styrene), PE (polyethylene), PP (polypropylene), AS resin (acrylonitrile styrene), PS (polystyrene), PET (polyethylene terephthalate), PLA (polylactic acid) resin. .. More specifically, it is selected from the group consisting of polypropylene (PP) and ABS (acrylonitrile butadiene styrene). The hardness of the first cover portion 20 is 95 to 100, which is higher than the hardness of the water purification filter 3 described later. The hardness of the ABS resin is 95, the hardness of polypropylene is 100, and the hardness of the polyethylene terephthalate resin is 97.
第2カバー部22の材料としては、プラスチックが挙げられる。当該プラスチックとしては、ABS樹脂(アクリロニトリルブタジエンスチレン)、PE(ポリエチレン)、PP(ポリプロピレン)、AS樹脂(アクリロニトリルスチレン)、PS(ポリスチレン)、PET(ポリエチレンテレフタレート)、PLA(ポリ乳酸)樹脂製である。より具体的には、ポリプロピレン(PP)、ABS(アクリロニトリルブタジエンスチレン)からなる群から選択される。第2カバー部22の硬度は、95〜100であり、後述する浄水フィルター3の硬度よりも高い。なお、ABS樹脂の硬度は95、ポリプロピレンの硬度は100、ポリエチレンテレフタレート樹脂の硬度は97である。 Examples of the material of the second cover portion 22 include plastic. The plastic is made of ABS resin (acrylonitrile butadiene styrene), PE (polyethylene), PP (polypropylene), AS resin (acrylonitrile styrene), PS (polystyrene), PET (polyethylene terephthalate), PLA (polylactic acid) resin. .. More specifically, it is selected from the group consisting of polypropylene (PP) and ABS (acrylonitrile butadiene styrene). The hardness of the second cover portion 22 is 95 to 100, which is higher than the hardness of the water purification filter 3 described later. The hardness of the ABS resin is 95, the hardness of polypropylene is 100, and the hardness of the polyethylene terephthalate resin is 97.
第1カバー部20の硬度が浄水フィルター3の硬度よりも高く、かつ第2カバー部22の硬度が浄水フィルター3の硬度よりも高いのであれば、第1カバー部20と第2カバー部22とは同じ材料から形成されてもよいし、異なる材料から形成されてもよい。なお、本明細書中の硬度の測定は、測定機器はTECLOCK製硬度計GS701Gにて、JIS S 6050「プラスチック字消し」にて規定されている方法にて実施し、N=5での平均値を測定値、で行うものとする。 If the hardness of the first cover portion 20 is higher than the hardness of the water purification filter 3 and the hardness of the second cover portion 22 is higher than the hardness of the water purification filter 3, the first cover portion 20 and the second cover portion 22 May be formed from the same material or may be formed from different materials. The hardness in the present specification is measured by the TECLOCK hardness meter GS701G by the method specified in JIS S 6050 "Plastic eraser", and the average value at N = 5. Is the measured value.
図6で説明するように、第1カバー部20及び第2カバー部22のうち少なくとも一方は、内壁面に浄水フィルター3の位置決めのためのリブ240、241を備えていてもよい。図6Aはケーシング2の右側面図であり、図6Bは図6AのB−B断面図である。また、図6Cはケーシング2の右側面図であり、図6Dは図6CのD−D断面図である。図6Bに示すように、第1カバー部20の内壁面には、ケーシング2の内部空間に向かって突出し、上下方向(浄水フィルター3の軸方向)に延びるリブ240が形成される。図6Dに示すように、リブ240は、第1カバー部20の内壁面に4つ形成され、周方向に概ね等間隔に配置される。なお、図6B及び図6Dに示すリブ240はあくまでも一例である。リブ240が形成される位置、リブ240の形状及びリブ240の数等は、図6B及び図6Dに示す態様に限定されず、適宜変更することができる。 As described with reference to FIG. 6, at least one of the first cover portion 20 and the second cover portion 22 may be provided with ribs 240 and 241 for positioning the water purification filter 3 on the inner wall surface. 6A is a right side view of the casing 2, and FIG. 6B is a sectional view taken along the line BB of FIG. 6A. 6C is a right side view of the casing 2, and FIG. 6D is a sectional view taken along the line DD of FIG. 6C. As shown in FIG. 6B, ribs 240 are formed on the inner wall surface of the first cover portion 20 so as to project toward the internal space of the casing 2 and extend in the vertical direction (axial direction of the water purification filter 3). As shown in FIG. 6D, four ribs 240 are formed on the inner wall surface of the first cover portion 20 and are arranged at substantially equal intervals in the circumferential direction. The rib 240 shown in FIGS. 6B and 6D is merely an example. The position where the rib 240 is formed, the shape of the rib 240, the number of the rib 240, and the like are not limited to the modes shown in FIGS. 6B and 6D, and can be appropriately changed.
図6Eはケーシング2の右側面図であり、図6Fは図6EのF−F断面図である。図6Bに示すように、第2カバー部22の内壁面には、ケーシング2の内部空間に向かって突出し、上下方向(浄水フィルター3の軸方向)に延びるリブ241が形成される。図6Fに示すように、リブ241は、第2カバー部22の内壁面に4つ形成され、周方向に概ね等間隔に配置される。図6Gは、収容状態における図6EのF−F断面図である。図6Gに示すように、リブ241は、収容状態において、浄水フィルター3の中心がケーシング2の中心と概ね揃うように浄水フィルター3を位置決めする。なお、図6B及び図6Fに示すリブ241はあくまでも一例である。リブ241が形成される位置、リブ241の形状及びリブ241の数等は、図6B及び図6Fに示す態様に限定されず、適宜変更することができる。 6E is a right side view of the casing 2, and FIG. 6F is a sectional view taken along the line FF of FIG. 6E. As shown in FIG. 6B, ribs 241 projecting toward the internal space of the casing 2 and extending in the vertical direction (axial direction of the water purification filter 3) are formed on the inner wall surface of the second cover portion 22. As shown in FIG. 6F, four ribs 241 are formed on the inner wall surface of the second cover portion 22, and are arranged at substantially equal intervals in the circumferential direction. FIG. 6G is a cross-sectional view taken along the line FF of FIG. 6E in the housed state. As shown in FIG. 6G, the rib 241 positions the water purification filter 3 so that the center of the water purification filter 3 is substantially aligned with the center of the casing 2 in the housed state. The ribs 241 shown in FIGS. 6B and 6F are merely examples. The position where the rib 241 is formed, the shape of the rib 241 and the number of ribs 241 are not limited to the modes shown in FIGS. 6B and 6F, and can be appropriately changed.
リブ240、241は、収容状態において、浄水フィルター3の外周面とケーシング2の側壁部との間に空間230を備え、浄水フィルター3の中心がケーシング2の中心と概ね揃うように浄水フィルター3を位置決めする。浄水フィルター3がケーシング2に対して適切な位置に位置決めされることで、空洞部34、流入部207及び流出部223との相対位置が適切に維持されるとともに、浄水のための空間230が適切に確保される。これにより、水がカートリッジ1内を均一に移動するので、水浄化の効率が維持される。 The ribs 240 and 241 are provided with a space 230 between the outer peripheral surface of the water purification filter 3 and the side wall portion of the casing 2 in the housed state, and the water purification filter 3 is provided so that the center of the water purification filter 3 is substantially aligned with the center of the casing 2. Position. By positioning the water purification filter 3 at an appropriate position with respect to the casing 2, the relative positions of the cavity 34, the inflow portion 207 and the outflow portion 223 are appropriately maintained, and the space 230 for water purification is appropriate. Is secured in. As a result, water moves uniformly in the cartridge 1, so that the efficiency of water purification is maintained.
<2.浄水フィルター>
前述したように、浄水フィルター3は、空洞部34の原水を、側周部32を径方向外方に通過させることによって原水をろ過し、浄水とするための部材である。浄水フィルター3は、軸方向の両端に第1面31と第2面33とをそれぞれ有する。浄水フィルター3は、弾性を有する材料から形成されることが好ましい。これにより、浄水フィルター3は、第1カバー部20及び第2カバー部22のような、より硬度の高い物体と密着することができる。
<2. Water purification filter >
As described above, the water purification filter 3 is a member for filtering the raw water by passing the raw water in the cavity 34 outward in the radial direction through the side peripheral portion 32 to purify the raw water. The water purification filter 3 has a first surface 31 and a second surface 33 at both ends in the axial direction, respectively. The water purification filter 3 is preferably formed of an elastic material. As a result, the water purification filter 3 can be brought into close contact with a harder object such as the first cover portion 20 and the second cover portion 22.
浄水フィルター3をケーシングに収容する前の状態(すなわち、浄水フィルター3を軸方向に押圧し弾性変形させる前の状態)の第1面31と第2面33との距離L1(図2参照)は、連結状態における第1カバー部20の面203と第2カバー部22面221との距離L2(図5参照)と同値、又はわずかに短くなる様に形成されることが好ましい。 The distance L1 (see FIG. 2) between the first surface 31 and the second surface 33 in the state before the water purification filter 3 is housed in the casing (that is, the state before the water purification filter 3 is elastically deformed by pressing in the axial direction) is It is preferable that the surface 203 of the first cover portion 20 and the surface 221 of the second cover portion 22 are formed so as to be equal to or slightly shorter than the distance L2 (see FIG. 5) in the connected state.
また、浄水フィルター3をケーシングに収容する前の状態(すなわち、浄水フィルター3を軸方向に押圧し弾性変形させる前の状態)の第1面31と第2面33との距離L1(図2参照)は、連結状態における第1突部208の先端部209と、第2突部224の先端部225との間の距離L3(すなわち、第1接触部と第2接触部との間の距離L3、図5参照)よりも長くなることが好ましい。これにより収容状態の浄水フィルター3の第1面31においては、空洞部34の径方向外方の領域に第1突部208が食い込んで係合し、浄水フィルター3を軸方向に圧縮する力が浄水フィルター3に加わり、第1面31と第1カバー部20の面203との間を遮断する。同様に、収容状態の浄水フィルター3の第2面33においては、空洞部34の径方向外方の領域に第2突部224が食い込んで係合し、浄水フィルター3を軸方向に圧縮する力が浄水フィルター3に加わり、第2面33と第2カバー部22の面221との間を遮断することが好ましい。これらによって、浄水フィルター3の両端の面を介して水が通過することが抑制され、空洞部34の原水と、空間230の浄水とが分離される。すなわち、第1接触部である第1突部208が、空洞部34の外周を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させ、第2接触部である第2突部224が、空洞部34の外周を囲むように環状に浄水フィルター3の第2面33に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる。これにより、浄水フィルターとケーシング及び蓋体との間に弾性部材を介さずとも、浄水フィルターの空洞部に流入した原水が、第1面31と第1カバー部との隙間、及び第2面33と第2カバー部との隙間を通過するのを防止することができ、原水が浄水フィルター3を通過するのを促進することができる。 Further, the distance L1 between the first surface 31 and the second surface 33 in the state before the water purification filter 3 is housed in the casing (that is, the state before the water purification filter 3 is elastically deformed by pressing in the axial direction) (see FIG. 2). ) Is the distance L3 between the tip portion 209 of the first protrusion 208 and the tip portion 225 of the second protrusion 224 in the connected state (that is, the distance L3 between the first contact portion and the second contact portion). , See FIG. 5). As a result, on the first surface 31 of the water purification filter 3 in the housed state, the first protrusion 208 bites into and engages with the radial outer region of the cavity 34, and a force for axially compressing the water purification filter 3 is applied. It joins the water purification filter 3 and blocks between the first surface 31 and the surface 203 of the first cover portion 20. Similarly, in the second surface 33 of the water purification filter 3 in the housed state, the force of the second protrusion 224 biting into and engaging with the radial outer region of the cavity 34 to compress the water purification filter 3 in the axial direction. Is added to the water purification filter 3 to block between the second surface 33 and the surface 221 of the second cover portion 22. As a result, the passage of water through the surfaces at both ends of the water purification filter 3 is suppressed, and the raw water in the cavity 34 and the purified water in the space 230 are separated. That is, the first protrusion 208, which is the first contact portion, contacts the first surface 31 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and presses the water purification filter 3 in the axial direction to elastically deform it. The second protrusion 224, which is the second contact portion, contacts the second surface 33 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and presses the water purification filter 3 in the axial direction to elastically deform it. As a result, the raw water that has flowed into the hollow portion of the water purification filter can flow into the gap between the first surface 31 and the first cover portion and the second surface 33 without the need for an elastic member between the water purification filter and the casing and the lid. It is possible to prevent the raw water from passing through the gap between the and the second cover portion, and it is possible to promote the raw water from passing through the water purification filter 3.
浄水フィルター3をケーシングに収容する前の状態(すなわち、浄水フィルター3を軸方向に押圧し弾性変形させる前の状態)の浄水フィルター3の長さL1の、収容状態における接触部間における圧縮率(L3/L1×100(%))は、98%以下であることが好ましく、96〜98%がより好ましく、97〜98%がより好ましく挙げられる。また、収容状態において、接触部の面積を減少させ、浄水フィルター3を軸方向に押圧し弾性変形させる圧力を増加しやすくする観点から、第1接触部及び第2接触部が環状の第1突部208及び第2突部224であって、収容状態における浄水フィルター3の長さL1の第1、第2接触部間における圧縮率(L3/L1×100(%))を上記範囲としつつ、浄水フィルター3をケーシングに収容する前の状態(すなわち、浄水フィルター3を軸方向に押圧し弾性変形させる前の状態)の浄水フィルター3の長さL1に対する連結状態における第1カバー部20の面203と第2カバー部22の面221との距離L2の比率(L2/L1×100(%))としては、例えば、98%以上が挙げられ、98〜101%が好ましく挙げられ、99〜101%がより好ましく挙げられる。 The compression ratio (that is, the state before the water purification filter 3 is accommodated in the casing (that is, the state before the water purification filter 3 is axially pressed and elastically deformed) is the length L1 of the water purification filter 3 between the contact portions in the accommodating state. L3 / L1 × 100 (%)) is preferably 98% or less, more preferably 96 to 98%, and more preferably 97 to 98%. Further, from the viewpoint of reducing the area of the contact portion and increasing the pressure for elastically deforming the water purification filter 3 in the accommodating state, the first contact portion and the second contact portion are annular first protrusions. The compression ratio (L3 / L1 × 100 (%)) between the first and second contact portions of the length L1 of the water purification filter 3 in the contained state of the portion 208 and the second protrusion 224 is within the above range. The surface 203 of the first cover portion 20 in the state of being connected to the length L1 of the water purification filter 3 in the state before the water purification filter 3 is housed in the casing (that is, the state before the water purification filter 3 is elastically deformed by pressing in the axial direction). The ratio of the distance L2 (L2 / L1 × 100 (%)) between the surface and the surface 221 of the second cover portion 22 is, for example, 98% or more, preferably 98 to 101%, and 99 to 101%. Is more preferably mentioned.
水の通過をさらに確実に阻止する観点からは、浄水フィルターの第1面31、及び浄水フィルターの第2面33のうち少なくとも一方には、シール剤が塗布されていることが好ましい。また、浄水フィルターの第1面31、及び第2面33の双方にシール剤が塗布されていることがより好ましい。本実施形態では、第1面31及び第2面33にシール剤として、ホットメルト接着剤が塗布される。ホットメルト接着剤の主成分としては、例えばエチレン酢酸ビニル(EVA)、オレフィン、ゴム等が挙げられる。シール剤の塗布厚さとしては、10μm〜1000μm、塗布量としては、1〜100(mg/cm2)とすることが挙げられる。なお、シール剤は、浄水フィルター3をケーシング2に収容する前に、予め塗布し、固化させたものとすることができる。 From the viewpoint of more reliably blocking the passage of water, it is preferable that at least one of the first surface 31 of the water purification filter and the second surface 33 of the water purification filter is coated with a sealant. Further, it is more preferable that the sealant is applied to both the first surface 31 and the second surface 33 of the water purification filter. In the present embodiment, a hot melt adhesive is applied to the first surface 31 and the second surface 33 as a sealing agent. Examples of the main component of the hot melt adhesive include ethylene vinyl acetate (EVA), olefin, and rubber. The coating thickness of the sealant may be 10 μm to 1000 μm, and the coating amount may be 1 to 100 (mg / cm 2 ). The sealant may be applied and solidified in advance before the water purification filter 3 is housed in the casing 2.
カートリッジ1の内部を通過する水の主な流れは、図7中に示す矢印で表される。まず原水が第1カバー部20、すなわち流入部207を介してカートリッジ1内に流入する。カートリッジ1内に流入した原水は、空洞部34内に流入し、一旦貯留される。ここで、空洞部34の上側周縁及び下側周縁には、それぞれ第1突部208及び第2突部224が係合して、浄水フィルター3を軸方向に押圧し、弾性変形させている。このため、原水は第1面31及び第2面33を介して空間230へと流出しない。空洞部34内に貯留された原水は、側周部32を径方向外方に通過し、浄水として空間230へ流出する。続いて、浄水は空間230から流出部223を介してカートリッジ1の外部へ排出される。 The main flow of water passing through the inside of the cartridge 1 is represented by the arrow shown in FIG. First, the raw water flows into the cartridge 1 through the first cover portion 20, that is, the inflow portion 207. The raw water that has flowed into the cartridge 1 flows into the cavity 34 and is temporarily stored. Here, the first protrusion 208 and the second protrusion 224 are engaged with the upper peripheral edge and the lower peripheral edge of the cavity 34, respectively, to press the water purification filter 3 in the axial direction and elastically deform it. Therefore, the raw water does not flow out to the space 230 through the first surface 31 and the second surface 33. The raw water stored in the cavity 34 passes radially outward through the side peripheral portion 32 and flows out to the space 230 as purified water. Subsequently, the purified water is discharged from the space 230 to the outside of the cartridge 1 via the outflow portion 223.
浄水フィルター3は、活性炭成型体を繊維状活性炭を含むものとすると、弾性をより有しやすくなる。浄水フィルター3の硬度は、第1カバー部20の硬度及び第2カバー部22の硬度よりも低いことが好ましい。ケーシング2の硬度は、浄水フィルター3より硬く、浄水フィルター3の硬度は、86以下であることが好ましく、50〜80程度あることがより好ましい。なお、同硬度測定は、JIS S 6050「プラスチック字消し」にて規定されている方法にて実施し、N=5での平均値を硬度とする。 When the activated carbon molded body contains fibrous activated carbon, the water purification filter 3 is more likely to have elasticity. The hardness of the water purification filter 3 is preferably lower than the hardness of the first cover portion 20 and the hardness of the second cover portion 22. The hardness of the casing 2 is harder than that of the water purification filter 3, and the hardness of the water purification filter 3 is preferably 86 or less, more preferably about 50 to 80. The hardness is measured by the method specified in JIS S 6050 "Plastic Eraser", and the average value at N = 5 is taken as the hardness.
<5.特徴>
カートリッジ1の製造時において、浄水フィルター3の第1面31と第2面33との距離(浄水フィルター3の長さ)L1は、連結状態における第1カバー部20の面203と第2カバー部22面221との距離L2と同値、又はわずかに短くなる様に形成されることが好ましい。また、浄水フィルター3の長さL1は、連結状態における第1突部208の先端部209と、第2突部224の先端部225との間の距離L3よりも長くなることが好ましい。これにより収容状態の浄水フィルター3の第1面31においては、空洞部34の径方向外方の領域に第1突部208が食い込んで係合し、浄水フィルター3を軸方向に圧縮する力が浄水フィルター3に加わり、第1面31と第1カバー部20の面203との間を遮断する。同様に、収容状態の浄水フィルター3の第2面33においては、空洞部34の径方向外方の領域に第2突部224が食い込んで係合し、浄水フィルター3を軸方向に圧縮する力が浄水フィルター3に加わり、第2面33と第2カバー部22の面221との間を遮断することが好ましい。これらによって、浄水フィルター3の両端の面を介して水が通過することが抑制され、空洞部34の原水と、空間230の浄水とが分離される。
<5. Features>
At the time of manufacturing the cartridge 1, the distance (length of the water purification filter 3) L1 between the first surface 31 and the second surface 33 of the water purification filter 3 is the surface 203 and the second cover portion of the first cover portion 20 in the connected state. It is preferably formed so as to have the same value as the distance L2 from the 22nd surface 221 or slightly shorter. Further, the length L1 of the water purification filter 3 is preferably longer than the distance L3 between the tip portion 209 of the first protrusion 208 and the tip portion 225 of the second protrusion 224 in the connected state. As a result, on the first surface 31 of the water purification filter 3 in the housed state, the first protrusion 208 bites into and engages with the radial outer region of the cavity 34, and a force for axially compressing the water purification filter 3 is applied. It joins the water purification filter 3 and blocks between the first surface 31 and the surface 203 of the first cover portion 20. Similarly, in the second surface 33 of the water purification filter 3 in the housed state, the force of the second protrusion 224 biting into and engaging with the radial outer region of the cavity 34 to compress the water purification filter 3 in the axial direction. Is added to the water purification filter 3 to block between the second surface 33 and the surface 221 of the second cover portion 22. As a result, the passage of water through the surfaces at both ends of the water purification filter 3 is suppressed, and the raw water in the cavity 34 and the purified water in the space 230 are separated.
さらに、第1面31及び第2面33自体がシール剤によってシールされることにより、カートリッジ1内部に流入した原水が浄水フィルター3の第1面31や第2面33を介して空間230にバイパスすることがさらに確実に阻止され、上述の効果をより高めることができる。 Further, since the first surface 31 and the second surface 33 themselves are sealed with the sealant, the raw water flowing into the cartridge 1 is bypassed to the space 230 via the first surface 31 and the second surface 33 of the water purification filter 3. This can be more reliably blocked and the above effects can be further enhanced.
浄水フィルター3は活性炭成型体を繊維状活性炭を含むものとすると、弾性をより有しやすくなる。これにより、第1カバー部20及び第2カバー部22を介して上下方向に圧縮される力が加わったとしても崩れにくく、破片を生じる可能性が低い。つまり、カートリッジ1内の水を汚染する可能性が低く、浄水の品質が維持される。また、浄水フィルター3が弾性を有することにより、第1カバー部20及び第2カバー部22の各突部208、224が、浄水フィルター3に係合したとき、浄水フィルター3を各突部208、224の形状に追従するように変形させることができる。すなわち、各突部208、224と浄水フィルター3とを密着させることができる。これによって、上述した原水の遮断効果をより向上することができる。 When the activated carbon molded body of the water purification filter 3 contains fibrous activated carbon, it becomes easier to have elasticity. As a result, even if a force that is compressed in the vertical direction is applied through the first cover portion 20 and the second cover portion 22, the cover is less likely to collapse and fragments are less likely to be generated. That is, the possibility of contaminating the water in the cartridge 1 is low, and the quality of purified water is maintained. Further, since the water purification filter 3 has elasticity, when the protrusions 208 and 224 of the first cover portion 20 and the second cover portion 22 are engaged with the water purification filter 3, the water purification filter 3 is moved to the protrusions 208, respectively. It can be deformed to follow the shape of 224. That is, the protrusions 208 and 224 can be brought into close contact with the water purification filter 3. Thereby, the above-mentioned blocking effect of raw water can be further improved.
一方、例えば、繊維状活性炭を含まず、粒状活性炭のみからなる浄水フィルターは、第1接触部及び第2接触部の押圧力により弾性変形しにくくなる。このような浄水フィルターに無理に押圧力を加えると、粒状活性炭の一部が崩れ落ち、浄水フィルターとして機能しなくなる可能性がある。また、押圧力を加えても反発力が生じず、浄水フィルターの両端面が第1、第2カバー部に密着しづらい。このため、浄水フィルターの空洞部に流入した原水が、第1面と第1カバー部との隙間、及び第2面と第2カバー部との隙間を通過するのを防止するためには、前述の隙間をシールするための弾性部材が別途必要となる。 On the other hand, for example, a water purification filter containing only granular activated carbon without containing fibrous activated carbon is less likely to be elastically deformed by the pressing force of the first contact portion and the second contact portion. If a pressing force is applied to such a water purification filter, a part of the granular activated carbon may collapse and the water purification filter may not function. Further, even if a pressing force is applied, no repulsive force is generated, and it is difficult for both end surfaces of the water purification filter to adhere to the first and second cover portions. Therefore, in order to prevent the raw water flowing into the cavity of the water purification filter from passing through the gap between the first surface and the first cover portion and the gap between the second surface and the second cover portion, the above-mentioned A separate elastic member is required to seal the gap between the two.
カートリッジ1は、同じ構成の浄水フィルター3を有するout−inタイプのカートリッジと比較すると、水のろ過速度が速いという特徴を有する。また、ケーシング2の外周面の液密性を確保する必要がないため、第1カバー部20と第2カバー部22とを着脱可能に構成することができ、浄水フィルター3の交換作業が容易となる。 The cartridge 1 is characterized in that the filtration rate of water is faster than that of an out-in type cartridge having the water purification filter 3 having the same configuration. Further, since it is not necessary to secure the liquidtightness of the outer peripheral surface of the casing 2, the first cover portion 20 and the second cover portion 22 can be detachably configured, and the water purification filter 3 can be easily replaced. Become.
(B.out−inタイプ)
以下、本発明に係る浄水カートリッジのout−inタイプ(以下、第2実施形態と記載することがある。)について図面を参照しつつ説明する。図8は本実施形態に係る浄水カートリッジ(以下、単にカートリッジと称することがある)1の外観斜視図、図9は断面図である。以下では、説明の便宜のため、図9の上下方向を「上下」、図9の左右方向を「左右」または「水平」、図9の紙面方向を「前後」と称し、これを基準に説明を行う。
(B. out-in type)
Hereinafter, the out-in type of the water purification cartridge according to the present invention (hereinafter, may be referred to as the second embodiment) will be described with reference to the drawings. FIG. 8 is an external perspective view of the water purification cartridge (hereinafter, may be simply referred to as a cartridge) 1 according to the present embodiment, and FIG. 9 is a sectional view. In the following, for convenience of explanation, the vertical direction of FIG. 9 is referred to as "up and down", the horizontal direction of FIG. 9 is referred to as "left and right" or "horizontal", and the paper direction of FIG. 9 is referred to as "front and back". I do.
第2実施形態に係る浄水カートリッジが第1実施形態と相違するのは、ケーシング2の構成である。より具体的には、本実施形態のカートリッジ1は、ケーシング2の側壁部と、浄水フィルター3の外周面との隙間に流入した原水が、径方向外側から内側に向かって浄水フィルター3を通過し、浄水フィルター3の空洞部から浄水として流出する、out−inタイプのカートリッジである。以下では、同一構成については同一の符号を付して、説明を省略する。 The water purification cartridge according to the second embodiment is different from the first embodiment in the configuration of the casing 2. More specifically, in the cartridge 1 of the present embodiment, the raw water that has flowed into the gap between the side wall portion of the casing 2 and the outer peripheral surface of the water purification filter 3 passes through the water purification filter 3 from the outer side to the inner side in the radial direction. , An out-in type cartridge that flows out as purified water from the cavity of the water purification filter 3. Hereinafter, the same components will be designated by the same reference numerals and description thereof will be omitted.
<1.ケーシング>
ケーシング2は、浄水フィルター3の第1面31をカバーする第1カバー部と、浄水フィルター3の第2面33をカバーする第2カバー部と、浄水フィルター3の外周面を覆う側壁部とを備える。本実施形態では、図8に示すように、ケーシング2は、浄水フィルター3の第1面31をカバーする第1カバー部20と、浄水フィルター3の第2面33をカバーする第2カバー部22とが連結されてなり、側壁部は、後述する第1カバー部20の側壁部と第2カバー部22の側壁部とから構成される。以下、第2カバー部22が第1カバー部20に連結された状態を連結状態と称する。連結状態において、ケーシング2内部には浄水フィルター3を収容するための空間が形成される。
<1. Casing >
The casing 2 has a first cover portion that covers the first surface 31 of the water purification filter 3, a second cover portion that covers the second surface 33 of the water purification filter 3, and a side wall portion that covers the outer peripheral surface of the water purification filter 3. Be prepared. In the present embodiment, as shown in FIG. 8, the casing 2 has a first cover portion 20 that covers the first surface 31 of the water purification filter 3 and a second cover portion 22 that covers the second surface 33 of the water purification filter 3. The side wall portion is composed of a side wall portion of the first cover portion 20 and a side wall portion of the second cover portion 22, which will be described later. Hereinafter, the state in which the second cover portion 22 is connected to the first cover portion 20 is referred to as a connected state. In the connected state, a space for accommodating the water purification filter 3 is formed inside the casing 2.
第1カバー部20は、上カバー部20aと、上カバー部20aの下端に一体的に連結される下カバー部20bとのパーツからなる。図9に示すように、上カバー部20aは、略円筒形状の側壁部231と、側壁部231に連続する略円形の上面部232とを有する。上面部232の周縁部には、原水がカートリッジ1内に流入するための貫通孔207aが周方向に間隔を空けて複数形成され、全体として複数の貫通孔207aが環状に配置された流入部207が形成される。側壁部231の外側上部には、カートリッジ1が浄水器の開口S4の周縁部に取り付けられるためのフランジ204が形成される。また、フランジ204の上下方向の中心にはパッキン104が嵌められるための溝210が形成される。浄水器の一例を図11Bに示す。図11Bに示す浄水器100は、カートリッジ1の構成以外は図11Aに示すものと共通であるため、説明は省略する。 The first cover portion 20 is composed of a part of an upper cover portion 20a and a lower cover portion 20b integrally connected to the lower end of the upper cover portion 20a. As shown in FIG. 9, the upper cover portion 20a has a substantially cylindrical side wall portion 231 and a substantially circular upper surface portion 232 continuous with the side wall portion 231. A plurality of through holes 207a for flowing raw water into the cartridge 1 are formed on the peripheral edge of the upper surface portion 232 at intervals in the circumferential direction, and a plurality of through holes 207a are arranged in an annular shape as a whole. Is formed. A flange 204 is formed on the outer upper portion of the side wall portion 231 for attaching the cartridge 1 to the peripheral edge portion of the opening S4 of the water purifier. Further, a groove 210 for fitting the packing 104 is formed at the center of the flange 204 in the vertical direction. An example of a water purifier is shown in FIG. 11B. Since the water purifier 100 shown in FIG. 11B is the same as that shown in FIG. 11A except for the configuration of the cartridge 1, the description thereof will be omitted.
下カバー部20bは、略円筒形状の側壁部233と、側壁部233の内側に形成された略円形の面部203′とを有する。図9に示すように、面部203′の周縁部には、流入部207を形成する貫通孔207aと対応する位置に貫通孔234aが周方向に間隔を空けて複数形成され、ケーシング2の内外を連通させる。面部203′のケーシング2の内部空間に対向する面を、面203と称する。面203には、複数の貫通孔234aに囲まれるように、環状の第1突部208が形成される。つまり、第1突部208は、流入部207aよりも径方向内側に形成される。第1突部208は、収容状態では、浄水フィルター3の第1面31において、浄水フィルター3の第1面31において、浄水フィルター3の空洞部34を囲むように環状に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる。この場合、第1突部208が、空洞部34の外周を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第1接触部となり得る。本発明の浄水カートリッジにおいて、面203は突部を有さないものでもあり得る。例えば、面203は、平面状であり得る。この場合、面203が、空洞部34の外周を囲むように環状に浄水フィルター3の第1面31に接触し、浄水フィルター3を軸方向に押圧し弾性変形させる第1接触部となり得る。第1突部208の断面形状は特に限定されないが、略三角形状、略四角形状、略半円形状、略半楕円形状等が挙げられる。略三角形状、略四角形状の角については、丸みを帯びたものであってもよい。 The lower cover portion 20b has a substantially cylindrical side wall portion 233 and a substantially circular surface portion 203 ′ formed inside the side wall portion 233. As shown in FIG. 9, a plurality of through holes 234a are formed at positions corresponding to the through holes 207a forming the inflow portion 207 on the peripheral edge of the surface portion 203'with a circumferential interval, and the inside and outside of the casing 2 are formed. Communicate. The surface of the surface portion 203 ′ facing the internal space of the casing 2 is referred to as a surface 203. An annular first protrusion 208 is formed on the surface 203 so as to be surrounded by the plurality of through holes 234a. That is, the first protrusion 208 is formed radially inward with respect to the inflow portion 207a. In the housed state, the first protrusion 208 is in circular contact on the first surface 31 of the water purification filter 3 and on the first surface 31 of the water purification filter 3 so as to surround the cavity 34 of the water purification filter 3, and the water purification filter 3 Is elastically deformed by pressing in the axial direction. In this case, the first protrusion 208 contacts the first surface 31 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and becomes the first contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. obtain. In the water purification cartridge of the present invention, the surface 203 may not have a protrusion. For example, the surface 203 can be flat. In this case, the surface 203 may be in contact with the first surface 31 of the water purification filter 3 in an annular shape so as to surround the outer periphery of the cavity 34, and may be the first contact portion that elastically deforms the water purification filter 3 by pressing it in the axial direction. The cross-sectional shape of the first protrusion 208 is not particularly limited, and examples thereof include a substantially triangular shape, a substantially quadrangular shape, a substantially semicircular shape, and a substantially semi-elliptical shape. The corners having a substantially triangular shape or a substantially square shape may be rounded.
面部203′の上面部232に対向する側には、前後方向に延びる断面四角形の通気通路235が形成される。通気通路235は、側壁部233に形成された断面四角形の通気口205と通じている。通気通路235は、下面203′から立ち上がる略平行な2つの側面と、2つの側面とに連続する上面で規定されるため、カートリッジ1内部を通過する水の流路とは隔離されている。 On the side of the surface portion 203 ′ facing the upper surface portion 232, a ventilation passage 235 having a quadrangular cross section extending in the front-rear direction is formed. The ventilation passage 235 communicates with the ventilation port 205 having a quadrangular cross section formed on the side wall portion 233. Since the ventilation passage 235 is defined by two substantially parallel side surfaces rising from the lower surface 203'and an upper surface continuous with the two side surfaces, the ventilation passage 235 is isolated from the water flow path passing through the inside of the cartridge 1.
第2カバー部22は、底部227と、底部227から連続して立ち上がる側壁部220とを有し、全体として略円筒形の外観を有する。側壁部220は、側壁部231及び側壁部233と概ね同じ径の略円筒形状に形成される。底部227の中央部には、浄水がカートリッジ1外に流出するための流出部223が形成される。流出部223は、円形の貫通孔223aを有する。底部227のケーシング2の内部空間に対向する面を面221と称する。面221において、流出部223の径方向外側の位置には、流出部223を囲むように環状の第2突部224が形成される。 The second cover portion 22 has a bottom portion 227 and a side wall portion 220 that continuously rises from the bottom portion 227, and has a substantially cylindrical appearance as a whole. The side wall portion 220 is formed in a substantially cylindrical shape having substantially the same diameter as the side wall portion 231 and the side wall portion 233. An outflow portion 223 for draining purified water to the outside of the cartridge 1 is formed in the central portion of the bottom portion 227. The outflow portion 223 has a circular through hole 223a. The surface of the bottom 227 facing the internal space of the casing 2 is referred to as a surface 221. An annular second protrusion 224 is formed on the surface 221 at a position on the outer side in the radial direction of the outflow portion 223 so as to surround the outflow portion 223.
本実施形態では、上カバー部20aと下カバー部20b、及び第1カバー部20と第2カバー部22とは、互いの連結部分が液密を保つように連結される。図8に示すように、第1カバー部20と第2カバー部22とが連結した連結状態において、側壁部231、側壁部233及び側壁部220とは概ね面一となり、共にケーシング2の側壁部21を形成する。上カバー部20aと下カバー部20b、及び第1カバー部20と第2カバー部22とは、例えば、超音波接合により連結される。 In the present embodiment, the upper cover portion 20a and the lower cover portion 20b, and the first cover portion 20 and the second cover portion 22 are connected so that the connecting portions thereof maintain liquid tightness. As shown in FIG. 8, in the connected state in which the first cover portion 20 and the second cover portion 22 are connected, the side wall portion 231 and the side wall portion 233 and the side wall portion 220 are substantially flush with each other, and both of them are the side wall portions of the casing 2. 21 is formed. The upper cover portion 20a and the lower cover portion 20b, and the first cover portion 20 and the second cover portion 22 are connected by, for example, ultrasonic bonding.
収容状態において、浄水フィルター3の外径は、ケーシング2の側壁部21の内径よりもわずかに小さい。これにより、第1実施形態と同様、収容状態では側周部32とケーシング2の側壁との隙間に環状の空間230が形成される。 In the housed state, the outer diameter of the water purification filter 3 is slightly smaller than the inner diameter of the side wall portion 21 of the casing 2. As a result, as in the first embodiment, in the accommodation state, an annular space 230 is formed in the gap between the side peripheral portion 32 and the side wall of the casing 2.
以下では、カートリッジ1を通過する水の流路について、より具体的に説明する。カートリッジ1内の水の主な流れは、図10中に示す矢印で表される。まず、タンク102から原水が流入部207、すなわち第1カバー部20を介してカートリッジ1内に流入する。流入部207から流入した原水は、貫通孔234aを通過し、空間230内に一旦貯留される。空間230内に貯留された原水は、浄水フィルター3の側周部32を径方向外側から内側へと通過し、浄水として空洞部34へと流入する。浄水は、空洞部34から流出部223からカートリッジ1の外部へ排出される。 Hereinafter, the flow path of water passing through the cartridge 1 will be described more specifically. The main flow of water in the cartridge 1 is represented by the arrows shown in FIG. First, raw water flows from the tank 102 into the cartridge 1 through the inflow portion 207, that is, the first cover portion 20. The raw water that has flowed in from the inflow portion 207 passes through the through hole 234a and is temporarily stored in the space 230. The raw water stored in the space 230 passes through the side peripheral portion 32 of the water purification filter 3 from the outside to the inside in the radial direction, and flows into the cavity 34 as purified water. The purified water is discharged from the cavity 34 to the outside of the cartridge 1 from the outflow portion 223.
<2.特徴>
第2実施形態の浄水フィルター3、面203、面221、第1突部208、及び第2突部224の構成は第1実施形態と共通である。従って、これらの構成による特徴は第1実施形態の説明で記載した通りである。以下では、第2実施形態に特有の特徴を記載する。
<2. Features>
The configurations of the water purification filter 3, the surface 203, the surface 221 and the first protrusion 208, and the second protrusion 224 of the second embodiment are the same as those of the first embodiment. Therefore, the features of these configurations are as described in the description of the first embodiment. In the following, features specific to the second embodiment will be described.
カートリッジ1では、浄水フィルター3の側周部32の径方向外側から内側へと水がろ過される。このため、浄水が存在するエリアである空洞部34に、中空糸膜等の別の種類のフィルターをさらに配置することができる。別の種類のフィルターを空洞部34に配置することで、カートリッジ1の容積を増加させることなく、コンパクトでろ過性能のより高い浄水カートリッジを提供することができる。 In the cartridge 1, water is filtered from the radial outside to the inside of the side peripheral portion 32 of the water purification filter 3. Therefore, another type of filter such as a hollow fiber membrane can be further arranged in the hollow portion 34, which is an area where purified water exists. By arranging another type of filter in the cavity 34, it is possible to provide a compact water purification cartridge having higher filtration performance without increasing the volume of the cartridge 1.
以下に、実施例及び比較例を示して本発明を詳細に説明する。ただし、本発明は、実施例に限定されない。 Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the examples.
(実施例1)
(1)浄水フィルターの製造
原水及び浄水の通水方向のタイプとしてin−outタイプとなるように、以下のようにして浄水フィルターを製造した。
(Example 1)
(1) Manufacture of water purification filter A water purification filter was manufactured as follows so that the type of raw water and purified water in the water flow direction would be an in-out type.
(1−1)活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布の準備
まず、熱融着性成分としてイソフタル酸が共重合されたポリエチレンテレフタレートを鞘部に、ポリエチレンテレフタレートを芯部に、配した、熱融着性短繊維を準備した。該熱融着性短繊維の、鞘部の融点は110℃、芯部の融点は260℃、繊維長は51mm、繊維径は12μm、繊度2.2dtexであった。該短繊維をカーディングして薄いウェブを形成し、該ウェブにニードルパンチ加工を施して温度175℃で熱処理、冷却することにより、短繊維が3次元にランダムに配列し該繊維同士が互いに交絡し熱融着した、活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布Aを得た。該不織布の目付は50g/m2、厚さは0.18mm、見かけ密度は0.28g/cm3であった。
(1-1) Preparation of Non-woven Fabric Containing Heat-Fusible Short Fibers Provided on the Side Side of the Activated Charcoal Molded Body on the Inflow Side First, polyethylene terephthalate copolymerized with isophthalic acid as a heat-sealing component is sheathed. A heat-sealing short fiber in which polyethylene terephthalate was arranged in the core portion was prepared. The heat-sealing short fibers had a melting point of 110 ° C. in the sheath portion, a melting point of 260 ° C. in the core portion, a fiber length of 51 mm, a fiber diameter of 12 μm, and a fineness of 2.2 dtex. The short fibers are carded to form a thin web, and the web is subjected to needle punching, heat-treated and cooled at a temperature of 175 ° C., so that the short fibers are randomly arranged in three dimensions and the fibers are entangled with each other. A non-woven fabric A containing heat-sealing short fibers was obtained, which was heat-sealed and provided on the side surface of the activated charcoal molded product on the side where the raw water flowed in. The weight of the non-woven fabric was 50 g / m 2 , the thickness was 0.18 mm, and the apparent density was 0.28 g / cm 3 .
(1−2)活性炭成型体とする不織布の準備
(1−2−1)原材料の準備
活性炭成型体とする不織布を製造するにあたり、以下の原材料を準備した。
・繊維状活性炭(株式会社アドール製商品名「W−10」、メソ細孔率27%、比表面積1100m2/g)
・弱酸型ポリアクリレート系イオン交換繊維(ユニチカ株式会社製Ca置換ポリアクリレート系イオン交換繊維:商品名A−02CAU)
・熱融着性短繊維(熱融着性成分としてイソフタル酸が共重合されたポリエチレンテレフタレートを鞘部に、ポリエチレンテレフタレートを芯部に、配した、熱融着性短繊維、鞘部の融点は110℃、芯部の融点は260℃、繊維長は51mm、繊維径は12μm、繊度は2.2dtex)
(1-2) Preparation of non-woven fabric to be used as an activated carbon molded body (1-2-1) Preparation of raw materials The following raw materials were prepared for producing a non-woven fabric to be used as an activated carbon molded body.
-Fibrous activated carbon (trade name "W-10" manufactured by Ador Co., Ltd., mesopore ratio 27%, specific surface area 1100 m 2 / g)
-Weak acid type polyacrylate-based ion exchange fiber (Ca-substituted polyacrylate-based ion exchange fiber manufactured by Unitica Co., Ltd .: trade name A-02CAU)
・ Heat-sealing short fibers (polyethylene terephthalate copolymerized with isophthalic acid as a heat-sealing component in the sheath and polyethylene terephthalate in the core, heat-sealing short fibers, the melting point of the sheath is 110 ° C, core melting point 260 ° C, fiber length 51 mm, fiber diameter 12 μm, fineness 2.2 dtex)
(1−2−2)活性炭を含む湿式不織布の製造
上記繊維状活性炭を78質量部、イオン交換繊維を10質量部、熱融着性短繊維を12質量部、合計100質量部を、パルパーを用いて混合し、均一に分散したスラリーを作製した。得られたスラリーを所定の流量でワイヤー上に流し、脱水することで坪量を調整した。その後、プレスパートを経てドライヤーパートでシートを乾燥し、カレンダーパートでシート表面を平滑にしてからリールで巻き取った。その後、熱プレスローラーでシートを110℃で熱プレスし、湿式不織布Bを得た。
(1-2-2) Production of Wet Nonwoven Fabric Containing Activated Carbon 78 parts by mass of the above fibrous activated carbon, 10 parts by mass of ion exchange fibers, 12 parts by mass of heat-sealing short fibers, 100 parts by mass in total, and pulper. To prepare a uniformly dispersed slurry. The basis weight was adjusted by flowing the obtained slurry on a wire at a predetermined flow rate and dehydrating it. Then, the sheet was dried by the dryer part via the press part, the surface of the sheet was smoothed by the calendar part, and then wound on a reel. Then, the sheet was hot-pressed at 110 ° C. with a hot press roller to obtain a wet non-woven fabric B.
(1−3)活性炭成型体の浄水が排出される側の側面に備えられる不織布の準備
スパンボンド不織布C(ユニチカ株式会社製商品名エルベス(登録商標)S0303WTO、芯部がポリエステル系樹脂からなり、鞘部がポリオレフィン系樹脂からなる芯鞘型複合繊維である連続繊維からなるスパンボンド不織布であり、堆積された連続繊維同士が、熱エンボス加工により部分的に圧着されることにより一体化された不織布、該不織布の目付30g/m2、厚さ0.23mm、見かけ密度0.13g/cm3)を準備した。
(1-3) Preparation of non-woven fabric provided on the side surface of the activated charcoal molded product on the side where purified water is discharged Spunbond non-woven fabric C (trade name Elves (registered trademark) S0303WTO manufactured by Unitika Ltd., the core is made of polyester resin. A spunbonded non-woven fabric made of continuous fibers whose sheath is a core-sheath-type composite fiber made of a polyolefin resin, and the deposited continuous fibers are partially pressure-bonded by thermal embossing to be integrated. , The texture of the non-woven fabric was 30 g / m 2 , the thickness was 0.23 mm, and the apparent density was 0.13 g / cm 3 ).
(1−4)浄水フィルターの製造
芯として外径が23.7mmの鉄製の円筒状パイプを準備し、当該芯に、不織布Aを所定の厚さとなるように捲回し、次いで、当該不織布Aの上に、活性炭成型体とする活性炭を含む湿式不織布Bを、当該不織布Aの上に所定の厚さとなるように捲回し、さらに、活性炭を含む湿式不織布Bの上に、スパンボンド不織布Cを所定の厚さとなるように捲回した。そして、不織布A、活性炭を含む湿式不織布B、及びスパンボンド不織布Cを捲回した状態で、炉に入れ、雰囲気温度150℃で2時間熱処理を施した後、自然冷却した。その後、芯を除去した後、カット機で92mmの長さにカットし、本発明の浄水フィルターを得た。なお、浄水フィルターの高さ(長さ)L1は92mm、外径は40mm、内径は22.4mmであった。また、JIS S 6050準拠デュロメータ硬さ計(株式会社テクロック社製)で測定される浄水フィルターの硬度は62であり弾性を有していた。また、浄水フィルターにおける活性炭成型体は、外径が39.5mm、内径が22.8mm、質量が18.2gであり、活性炭成型体に含有される熱融着性短繊維の熱融着性成分、不織布Aの熱融着性短繊維の熱融着性成分及びスパンボンド不織布Cを構成する複合繊維のポリオレフィン系樹脂が溶融することにより、不織布Aと活性炭成型体、スパンボンド不織布Cと活性炭成型体とが融着していた。
(1-4) Manufacture of water purification filter An iron cylindrical pipe having an outer diameter of 23.7 mm is prepared as a core, and the non-woven fabric A is wound around the core so as to have a predetermined thickness, and then the non-woven fabric A is wound. A wet non-woven fabric B containing activated carbon as an activated carbon molded body is wound on the non-woven fabric A so as to have a predetermined thickness, and a spunbonded non-woven fabric C is predetermined on the wet non-woven fabric B containing activated carbon. It was wound so that it would be as thick as. Then, the non-woven fabric A, the wet non-woven fabric B containing activated carbon, and the spunbonded non-woven fabric C were placed in a furnace in a wound state, heat-treated at an atmospheric temperature of 150 ° C. for 2 hours, and then naturally cooled. Then, after removing the core, it was cut to a length of 92 mm with a cutting machine to obtain the water purification filter of the present invention. The height (length) L1 of the water purification filter was 92 mm, the outer diameter was 40 mm, and the inner diameter was 22.4 mm. Further, the hardness of the water purification filter measured by a JIS S 6050 compliant durometer hardness meter (manufactured by Teclock Co., Ltd.) was 62, which was elastic. The activated carbon molded body in the water purification filter has an outer diameter of 39.5 mm, an inner diameter of 22.8 mm, and a mass of 18.2 g, and is a heat-sealing component of the heat-sealing short fibers contained in the activated carbon molded body. , Heat-sealing property of non-woven fabric A The heat-sealing component of short fibers and the polyolefin resin of the composite fiber constituting the spunbonded non-woven fabric C are melted to form the non-woven fabric A and the activated carbon molded body, and the spunbonded non-woven fabric C and the activated carbon molding. The body was fused.
(2)浄水カートリッジの製造
得られた浄水フィルターを含む、本発明の浄水カートリッジを製造した。浄水カートリッジは、前述した第1実施形態と同様のものを製造し、ケーシングの材料はABS樹脂であり、硬度は95であった。また、ケーシングのL2は92.0mm、L3は89.2mmとした。すなわち、原水が流入する流入部、及び浄水が流出する流出部を有する筒状のケーシングと、前記ケーシングの内部に収容され、前記原水をろ過するための浄水フィルターと、を備え、前記浄水フィルターは、弾性を有するとともに、空洞部を有する円筒状に形成され、軸方向の両端に、それぞれ第1面及び第2面を有しており、前記ケーシングは、前記浄水フィルターの第1面をカバーする第1カバー部と、前記浄水フィルターの第2面をカバーする第2カバー部と、前記浄水フィルターの外周面を覆う側壁部と、を備え、前記第1カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第1面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第1接触部が形成され、前記第2カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第2面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第2接触部が形成され、前記浄水フィルターは前記第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング内部に収容され、前記ケーシングの前記流入部から流入した前記原水は、前記第1カバー部を介して、前記浄水フィルターの前記空洞部に流入し、当該浄水フィルターを径方向外方に通過して前記浄水フィルターの外周面と前記ケーシングの側壁部との間の空間に流出し、前記流出部から外部に排出されるように構成されている、ポット型浄水器用浄水カートリッジを得た。
(2) Manufacture of water purification cartridge The water purification cartridge of the present invention including the obtained water purification filter was manufactured. The water purification cartridge was manufactured in the same manner as in the first embodiment described above, the casing material was ABS resin, and the hardness was 95. The casing L2 was 92.0 mm and L3 was 89.2 mm. That is, the water purification filter includes a tubular casing having an inflow portion into which raw water flows in and an outflow portion through which purified water flows out, and a water purification filter housed inside the casing for filtering the raw water. It is formed in a cylindrical shape having elasticity and a cavity, and has first and second surfaces at both ends in the axial direction, respectively, and the casing covers the first surface of the water purification filter. A first cover portion, a second cover portion that covers the second surface of the water purification filter, and a side wall portion that covers the outer peripheral surface of the water purification filter are provided, and the first cover portion includes the outer periphery of the cavity portion. A first contact portion is formed in which the water purification filter is annularly contacted with the first surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The second cover portion has an outer periphery of the cavity portion. A second contact portion is formed in which the water purification filter is annularly contacted with the second surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The water purification filter has the first contact portion and the second contact portion. The raw water, which is housed inside the casing in a state of being elastically deformed by the pressing force of the contact portion and has flowed in from the inflow portion of the casing, flows into the cavity portion of the water purification filter via the first cover portion. Then, it is configured to pass through the water purification filter outward in the radial direction, flow out into the space between the outer peripheral surface of the water purification filter and the side wall portion of the casing, and be discharged to the outside from the outflow portion. , Obtained a water purification cartridge for a pot-type water purifier.
(3)浄水器の製造
上記浄水カートリッジを、図11Aに示すような浄水器に取り付け、本発明のポット型浄水器を得た。
(3) Manufacture of Water Purifier The above water purification cartridge was attached to a water purifier as shown in FIG. 11A to obtain a pot-type water purifier of the present invention.
(実施例2)
(1)浄水フィルターの製造
原水及び浄水の通水方向のタイプとしてin−outタイプとなるように、以下のようにして浄水フィルターを製造した。
(1−1)活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布の準備
(1−1−1)原材料の準備
上記不織布を製造するにあたり、以下の原材料を準備した。
・熱融着性短繊維(実施例1で準備した、活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布に用いた熱融着性短繊維を準備した。)
・繊維状活性炭(株式会社アドール製商品名「A−7」、メソ細孔率4%、比表面積850m2/g)
・弱酸型ポリアクリレート系イオン交換繊維(ユニチカ株式会社製Ca置換ポリアクリレート系イオン交換繊維:商品名A−02CAU)
(1−1−2)熱融着性短繊維を含む不織布の製造
上記熱融着性短繊維35質量部、繊維状活性炭20質量部、イオン交換繊維45質量部、合計100質量部を、混合し、カーディングして薄いウェブを形成し、該ウェブにニードルパンチ加工を施して温度110℃で熱処理、冷却することにより、短繊維が3次元にランダムに配列し該繊維同士が互いに交絡し熱融着した、活性炭成型体の原水が流入する側の側面に備えられる、熱融着性短繊維を含む不織布Dを得た。該不織布の目付は70g/m2、厚さは0.42mm、見かけ密度は0.17g/cm3であった。
(Example 2)
(1) Manufacture of water purification filter A water purification filter was manufactured as follows so that the type of raw water and purified water in the water flow direction would be an in-out type.
(1-1) Preparation of non-woven fabric containing heat-sealing short fibers provided on the side surface of the activated carbon molded product on the inflow side (1-1-1) Preparation of raw materials In manufacturing the above-mentioned non-woven fabric, the following The raw materials were prepared.
-Heat-fused short fibers (prepared in Example 1, heat-fused short fibers used for the non-woven fabric containing the heat-fused short fibers provided on the side surface of the activated carbon molded body on the side where the raw water flows in are prepared. did.)
-Fibrous activated carbon (trade name "A-7" manufactured by Ador Co., Ltd., mesopore ratio 4%, specific surface area 850 m 2 / g)
-Weak acid type polyacrylate-based ion exchange fiber (Ca-substituted polyacrylate-based ion exchange fiber manufactured by Unitica Co., Ltd .: trade name A-02CAU)
(1-1-2) Production of Nonwoven Fabric Containing Heat-Fusible Short Fibers A total of 100 parts by mass of 35 parts by mass of the heat-bondable short fibers, 20 parts by mass of fibrous activated carbon, and 45 parts by mass of ion exchange fibers are mixed. Then, by carding to form a thin web, the web is subjected to needle punching, heat-treated at a temperature of 110 ° C., and cooled, short fibers are randomly arranged in three dimensions, and the fibers are entangled with each other to generate heat. A non-woven fabric D containing heat-sealing short fibers provided on the side surface of the fused activated charcoal molded product on the inflow side was obtained. The non-woven fabric had a basis weight of 70 g / m 2 , a thickness of 0.42 mm, and an apparent density of 0.17 g / cm 3 .
(1−2)活性炭成型体とする不織布の準備
実施例1と同一の、活性炭成型体とする不織布Bを準備した。
(1-2) Preparation of Non-woven Fabric as Activated Carbon Molded Body The same non-woven fabric B as the activated carbon molded body as in Example 1 was prepared.
(1−3)活性炭成型体の浄水が排出される側の側面に備えられる不織布の準備
実施例1と同一の、活性炭成型体の浄水が排出される側の側面に備えられる不織布C(スパンボンド不織布)を準備した。
(1-3) Preparation of non-woven fabric provided on the side surface of the activated carbon molded product on the side where purified water is discharged The same as in Example 1, the non-woven fabric C (spun bond) provided on the side surface of the activated carbon molded product on the side where purified water is discharged. Non-woven fabric) was prepared.
(1−4)浄水フィルターの製造
芯として外径が23.7mmの鉄製の円筒状パイプを準備し、当該芯に、不織布Dを所定の厚さとなるように捲回し、次いで、当該不織布Dの上に、活性炭成型体とする活性炭を含む湿式不織布Bを、当該不織布Dの上に所定の厚さとなるように捲回し、さらに、活性炭を含む湿式不織布Bの上に、スパンボンド不織布Cを所定の厚さとなるように捲回した。そして、不織布D、活性炭を含む湿式不織布B、及びスパンボンド不織布Cを捲回した状態で、炉に入れ、雰囲気温度150℃で2時間熱処理を施した後、自然冷却した。その後、芯を除去した後、カット機で92.0mmの長さにカットし、本発明の浄水フィルターを得た。なお、浄水フィルターの高さ(長さ)L1は92.0mm、外径は40.0mm、内径は22.4mmであった。また、JIS S 6050準拠デュロメータ硬さ計(株式会社テクロック社製)で測定される浄水フィルターの硬度は62であり弾性を有していた。また、浄水フィルターにおける活性炭成型体は、外径が39.5mm、内径が23.2mm、質量が17.2gであり、活性炭成型体に含有される熱融着性短繊維の熱融着性成分、不織布Dの熱融着性短繊維の熱融着性成分及びスパンボンド不織布Cを構成する複合繊維のポリオレフィン系樹脂が溶融することにより、不織布Dと活性炭成型体、スパンボンド不織布Cと活性炭成型体とが融着していた。
(1-4) Manufacture of water purification filter An iron cylindrical pipe having an outer diameter of 23.7 mm is prepared as a core, and the non-woven fabric D is wound around the core so as to have a predetermined thickness, and then the non-woven fabric D is wound. A wet non-woven fabric B containing activated carbon as an activated carbon molded body is wound on the non-woven fabric D so as to have a predetermined thickness, and a spunbonded non-woven fabric C is predetermined on the wet non-woven fabric B containing activated carbon. It was wound so that it would be as thick as. Then, the non-woven fabric D, the wet non-woven fabric B containing activated carbon, and the spunbonded non-woven fabric C were placed in a furnace in a wound state, heat-treated at an atmospheric temperature of 150 ° C. for 2 hours, and then naturally cooled. Then, after removing the core, it was cut to a length of 92.0 mm with a cutting machine to obtain a water purification filter of the present invention. The height (length) L1 of the water purification filter was 92.0 mm, the outer diameter was 40.0 mm, and the inner diameter was 22.4 mm. Further, the hardness of the water purification filter measured by a JIS S 6050 compliant durometer hardness meter (manufactured by Teclock Co., Ltd.) was 62, which was elastic. The activated carbon molded body in the water purification filter has an outer diameter of 39.5 mm, an inner diameter of 23.2 mm, and a mass of 17.2 g, and is a heat-sealing component of heat-sealing short fibers contained in the activated carbon molded body. , Heat-sealing property of non-woven fabric D The heat-sealing component of short fibers and the polyolefin resin of the composite fiber constituting the spunbonded non-woven fabric C are melted to form the non-woven fabric D and the activated carbon molded body, and the spunbonded non-woven fabric C and the activated carbon molding. The body was fused.
(2)浄水カートリッジの製造
得られた浄水フィルターを含む、本発明の浄水カートリッジを製造した。浄水カートリッジは、前述した第1実施形態と同様のものを製造し、ケーシングの材料はABS樹脂であり、硬度は95であった。また、ケーシングのL2は92.0mm、L3は89.2mmとした。すなわち、原水が流入する流入部、及び浄水が流出する流出部を有する筒状のケーシングと、前記ケーシングの内部に収容され、前記原水をろ過するための浄水フィルターと、を備え、前記浄水フィルターは、弾性を有するとともに、空洞部を有する円筒状に形成され、軸方向の両端に、それぞれ第1面及び第2面を有しており、前記ケーシングは、前記浄水フィルターの第1面をカバーする第1カバー部と、前記浄水フィルターの第2面をカバーする第2カバー部と、前記浄水フィルターの外周面を覆う側壁部と、を備え、前記第1カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第1面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第1接触部が形成され、前記第2カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第2面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第2接触部が形成され、前記浄水フィルターは前記第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング内部に収容され、前記ケーシングの前記流入部から流入した前記原水は、前記第1カバー部を介して、前記浄水フィルターの前記空洞部に流入し、当該浄水フィルターを径方向外方に通過して前記浄水フィルターの外周面と前記ケーシングの側壁部との間の空間に流出し、前記流出部から外部に排出されるように構成されている、ポット型浄水器用浄水カートリッジを得た。
(2) Manufacture of water purification cartridge The water purification cartridge of the present invention including the obtained water purification filter was manufactured. The water purification cartridge was manufactured in the same manner as in the first embodiment described above, the casing material was ABS resin, and the hardness was 95. The casing L2 was 92.0 mm and L3 was 89.2 mm. That is, the water purification filter includes a tubular casing having an inflow portion into which raw water flows in and an outflow portion through which purified water flows out, and a water purification filter housed inside the casing for filtering the raw water. It is formed in a cylindrical shape having elasticity and a cavity, and has first and second surfaces at both ends in the axial direction, respectively, and the casing covers the first surface of the water purification filter. A first cover portion, a second cover portion that covers the second surface of the water purification filter, and a side wall portion that covers the outer peripheral surface of the water purification filter are provided, and the first cover portion includes the outer periphery of the cavity portion. A first contact portion is formed in which the water purification filter is annularly contacted with the first surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The second cover portion has an outer periphery of the cavity portion. A second contact portion is formed in which the water purification filter is annularly contacted with the second surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The water purification filter has the first contact portion and the second contact portion. The raw water, which is housed inside the casing in a state of being elastically deformed by the pressing force of the contact portion and has flowed in from the inflow portion of the casing, flows into the cavity portion of the water purification filter via the first cover portion. Then, it is configured to pass through the water purification filter outward in the radial direction, flow out into the space between the outer peripheral surface of the water purification filter and the side wall portion of the casing, and be discharged to the outside from the outflow portion. , Obtained a water purification cartridge for a pot-type water purifier.
(3)浄水器の製造
上記浄水カートリッジを、実施例1と同様に浄水器に取り付け、本発明のポット型浄水器を得た。
(3) Manufacture of Water Purifier The above water purification cartridge was attached to the water purifier in the same manner as in Example 1 to obtain the pot-type water purifier of the present invention.
(比較例1)
(1)浄水フィルターの製造
原水及び浄水の通水方向のタイプとしてin−outタイプとなるように、以下のようにして浄水フィルターを製造した。
(1−1)活性炭成型体の原水が流入する側の側面に備えられる、不織布の準備
実施例1の、活性炭成型体の浄水が排出される側の側面に備えられる不織布として準備した不織布と同一の不織布C(スパンボンド不織布)を準備した。
(Comparative Example 1)
(1) Manufacture of water purification filter A water purification filter was manufactured as follows so that the type of raw water and purified water in the water flow direction would be an in-out type.
(1-1) Preparation of non-woven fabric provided on the side surface of the activated carbon molded product on the side where the raw water flows in The same as the non-woven fabric prepared as the non-woven fabric provided on the side surface of the activated carbon molded product on the side where the purified water is discharged. Nonwoven fabric C (spunbonded non-woven fabric) was prepared.
(1−2)活性炭成型体とする不織布の準備
実施例1と同一の、活性炭成型体とする不織布Bを準備した。
(1-2) Preparation of Non-woven Fabric as Activated Carbon Molded Body The same non-woven fabric B as the activated carbon molded body as in Example 1 was prepared.
(1−3)活性炭成型体の浄水が排出される側の側面に備えられる不織布の準備
実施例1と同一の、活性炭成型体の浄水が排出される側の側面に備えられる不織布C(スパンボンド不織布)を準備した。
(1-3) Preparation of non-woven fabric provided on the side surface of the activated carbon molded product on the side where purified water is discharged The same as in Example 1, the non-woven fabric C (spun bond) provided on the side surface of the activated carbon molded product on the side where purified water is discharged. Non-woven fabric) was prepared.
(1−4)浄水フィルターの製造
芯として外径が23.7mmの鉄製の円筒状パイプを準備し、当該芯に、不織布Cを所定の厚さとなるように捲回し、次いで、当該不織布Cの上に、活性炭成型体とする活性炭を含む湿式不織布Bを、当該不織布Cの上に所定の厚さとなるように捲回し、さらに、活性炭を含む湿式不織布Bの上に、別のスパンボンド不織布Cを所定の厚さとなるように捲回した。そして、不織布C、活性炭を含む湿式不織布B、及びスパンボンド不織布Cを捲回した状態で、炉に入れ、雰囲気温度150℃で2時間熱処理を施した後、自然冷却した。その後、芯を除去した後、カット機で92.0mmの長さにカットし、比較例の浄水フィルターを得た。なお、浄水フィルターの高さ(長さ)L1は92.0mm、外径は40.0mm、内径は22.4mmであった。また、JIS S 6050準拠デュロメータ硬さ計(株式会社テクロック社製)で測定される浄水フィルターの硬度は62であり弾性を有していた。また、浄水フィルターにおける活性炭成型体は、外径が39.5mm、内径が22.9mm、質量が18.3gであり、活性炭成型体に含有される熱融着性短繊維の熱融着性成分、スパンボンド不織布Cを構成する複合繊維のポリオレフィン系樹脂が溶融することにより、内層側のスパンボンド不織布Cと活性炭成型体、外層側のスパンボンド不織布Cと活性炭成型体とが融着していた。
(1-4) Manufacture of water purification filter An iron cylindrical pipe having an outer diameter of 23.7 mm is prepared as a core, and the non-woven fabric C is wound around the core so as to have a predetermined thickness, and then the non-woven fabric C is wound. A wet non-woven fabric B containing activated carbon as an activated carbon molded body is wound on the non-woven fabric C to a predetermined thickness, and another spunbonded non-woven fabric C is placed on the wet non-woven fabric B containing activated carbon. Was wound so as to have a predetermined thickness. Then, the non-woven fabric C, the wet non-woven fabric B containing activated carbon, and the spunbonded non-woven fabric C were placed in a furnace in a wound state, heat-treated at an atmospheric temperature of 150 ° C. for 2 hours, and then naturally cooled. Then, after removing the core, it was cut to a length of 92.0 mm with a cutting machine to obtain a water purification filter of Comparative Example. The height (length) L1 of the water purification filter was 92.0 mm, the outer diameter was 40.0 mm, and the inner diameter was 22.4 mm. Further, the hardness of the water purification filter measured by a JIS S 6050 compliant durometer hardness meter (manufactured by Teclock Co., Ltd.) was 62, which was elastic. The activated carbon molded body in the water purification filter has an outer diameter of 39.5 mm, an inner diameter of 22.9 mm, and a mass of 18.3 g, and is a heat-sealing component of the heat-sealing short fibers contained in the activated carbon molded body. By melting the polyolefin-based resin of the composite fiber constituting the spunbonded nonwoven fabric C, the spunbonded nonwoven fabric C on the inner layer side and the activated carbon molded body were fused, and the spunbonded nonwoven fabric C on the outer layer side and the activated carbon molded body were fused. ..
(2)浄水カートリッジの製造
得られた浄水フィルターを含む、比較例の浄水カートリッジを製造した。浄水カートリッジは、前述した第1実施形態と同様のものを製造し、ケーシングの材料はABS樹脂であり、硬度は95であった。また、ケーシングのL2は92.0mm、L3は89.2mmとした。すなわち、原水が流入する流入部、及び浄水が流出する流出部を有する筒状のケーシングと、前記ケーシングの内部に収容され、前記原水をろ過するための浄水フィルターと、を備え、前記浄水フィルターは、弾性を有するとともに、空洞部を有する円筒状に形成され、軸方向の両端に、それぞれ第1面及び第2面を有しており、前記ケーシングは、前記浄水フィルターの第1面をカバーする第1カバー部と、前記浄水フィルターの第2面をカバーする第2カバー部と、前記浄水フィルターの外周面を覆う側壁部と、を備え、前記第1カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第1面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第1接触部が形成され、前記第2カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第2面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第2接触部が形成され、前記浄水フィルターは前記第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング内部に収容され、前記ケーシングの前記流入部から流入した前記原水は、前記第1カバー部を介して、前記浄水フィルターの前記空洞部に流入し、当該浄水フィルターを径方向外方に通過して前記浄水フィルターの外周面と前記ケーシングの側壁部との間の空間に流出し、前記流出部から外部に排出されるように構成されている、ポット型浄水器用浄水カートリッジを得た。
(2) Manufacture of water purification cartridge A water purification cartridge of a comparative example including the obtained water purification filter was manufactured. The water purification cartridge was manufactured in the same manner as in the first embodiment described above, the casing material was ABS resin, and the hardness was 95. The casing L2 was 92.0 mm and L3 was 89.2 mm. That is, the water purification filter includes a tubular casing having an inflow portion into which raw water flows in and an outflow portion through which purified water flows out, and a water purification filter housed inside the casing for filtering the raw water. It is formed in a cylindrical shape having elasticity and a cavity, and has first and second surfaces at both ends in the axial direction, respectively, and the casing covers the first surface of the water purification filter. A first cover portion, a second cover portion that covers the second surface of the water purification filter, and a side wall portion that covers the outer peripheral surface of the water purification filter are provided, and the first cover portion includes the outer periphery of the cavity portion. A first contact portion is formed in which the water purification filter is annularly contacted with the first surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The second cover portion has an outer periphery of the cavity portion. A second contact portion is formed in which the water purification filter is annularly contacted with the second surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The water purification filter has the first contact portion and the second contact portion. The raw water, which is housed inside the casing in a state of being elastically deformed by the pressing force of the contact portion and has flowed in from the inflow portion of the casing, flows into the cavity portion of the water purification filter via the first cover portion. Then, it is configured to pass through the water purification filter outward in the radial direction, flow out into the space between the outer peripheral surface of the water purification filter and the side wall portion of the casing, and be discharged to the outside from the outflow portion. , Obtained a water purification cartridge for a pot-type water purifier.
(比較例2)
(1)浄水フィルターの製造
原水及び浄水の通水方向のタイプとしてin−outタイプとなるように、以下のようにして浄水フィルターを製造した。
(Comparative Example 2)
(1) Manufacture of water purification filter A water purification filter was manufactured as follows so that the type of raw water and purified water in the water flow direction would be an in-out type.
(1−1)活性炭成型体とする不織布の準備
実施例1と同一の、活性炭成型体とする不織布Bを準備した。
(1-1) Preparation of Non-woven Fabric as Activated Carbon Molded Body The same non-woven fabric B as the activated carbon molded body as in Example 1 was prepared.
(1−2)活性炭成型体の浄水が排出される側の側面に備えられる不織布の準備
実施例1と同一の、活性炭成型体の浄水が排出される側の側面に備えられる不織布C(スパンボンド不織布)を準備した。
(1-2) Preparation of non-woven fabric provided on the side surface of the activated carbon molded body on the side where purified water is discharged The same as in Example 1, non-woven fabric C (spun bond) provided on the side surface of the activated carbon molded body on the side where purified water is discharged. Non-woven fabric) was prepared.
(1−3)浄水フィルターの製造
芯として外径が23.7mmの鉄製の円筒状パイプを準備し、当該芯に、活性炭成型体とする活性炭を含む湿式不織布Bを所定の厚さとなるように捲回し、さらに、活性炭を含む湿式不織布Bの上に、スパンボンド不織布Cを所定の厚さとなるように捲回した。そして、活性炭を含む湿式不織布B、及びスパンボンド不織布Cを捲回した状態で、炉に入れ、雰囲気温度150℃で2時間熱処理を施した後、自然冷却した。その後、芯を除去した後、カット機で92.0mmの長さにカットし、比較例の浄水フィルターを得た。なお、浄水フィルターの高さ(長さ)L1は92.0mm、外径は40.0mm、内径は22.5mmであった。また、JIS S 6050準拠デュロメータ硬さ計(株式会社テクロック社製)で測定される浄水フィルターの硬度は62であり弾性を有していた。また、浄水フィルターにおける活性炭成型体は、外径が39.5mm、内径が22.4mm、質量が18.3gであり、活性炭成型体に含有される熱融着性短繊維の熱融着性成分、スパンボンド不織布Cを構成する複合繊維のポリオレフィン系樹脂が溶融することにより、外層側のスパンボンド不織布Cと活性炭成型体とが融着していた。
(1-3) Manufacture of water purification filter An iron cylindrical pipe having an outer diameter of 23.7 mm is prepared as a core, and a wet non-woven fabric B containing activated carbon as an activated carbon molded body is provided on the core so as to have a predetermined thickness. The spunbonded non-woven fabric C was wound on the wet non-woven fabric B containing activated carbon so as to have a predetermined thickness. Then, the wet non-woven fabric B containing activated carbon and the spunbonded non-woven fabric C were placed in a furnace in a wound state, heat-treated at an atmospheric temperature of 150 ° C. for 2 hours, and then naturally cooled. Then, after removing the core, it was cut to a length of 92.0 mm with a cutting machine to obtain a water purification filter of Comparative Example. The height (length) L1 of the water purification filter was 92.0 mm, the outer diameter was 40.0 mm, and the inner diameter was 22.5 mm. Further, the hardness of the water purification filter measured by a JIS S 6050 compliant durometer hardness meter (manufactured by Teclock Co., Ltd.) was 62, which was elastic. The activated carbon molded body in the water purification filter has an outer diameter of 39.5 mm, an inner diameter of 22.4 mm, and a mass of 18.3 g, and is a heat-sealing component of the heat-sealing short fibers contained in the activated carbon molded body. , The polyolefin resin of the composite fiber constituting the spunbonded nonwoven fabric C was melted, so that the spunbonded nonwoven fabric C on the outer layer side and the activated carbon molded body were fused.
(2)浄水カートリッジの製造
得られた浄水フィルターを含む、比較例の浄水カートリッジを製造した。浄水カートリッジは、前述した第1実施形態と同様のものを製造し、ケーシングの材料はABS樹脂であり、硬度は95であった。また、ケーシングのL2は92.0mm、L3は89.2mmとした。すなわち、原水が流入する流入部、及び浄水が流出する流出部を有する筒状のケーシングと、前記ケーシングの内部に収容され、前記原水をろ過するための浄水フィルターと、を備え、前記浄水フィルターは、弾性を有するとともに、空洞部を有する円筒状に形成され、軸方向の両端に、それぞれ第1面及び第2面を有しており、前記ケーシングは、前記浄水フィルターの第1面をカバーする第1カバー部と、前記浄水フィルターの第2面をカバーする第2カバー部と、前記浄水フィルターの外周面を覆う側壁部と、を備え、前記第1カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第1面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第1接触部が形成され、前記第2カバー部には、前記空洞部の外周を囲むように前記浄水フィルターの第2面に環状に接触し、前記浄水フィルターを軸方向に押圧し弾性変形させる第2接触部が形成され、前記浄水フィルターは前記第1接触部及び前記第2接触部の押圧力により弾性変形された状態で前記ケーシング内部に収容され、前記ケーシングの前記流入部から流入した前記原水は、前記第1カバー部を介して、前記浄水フィルターの前記空洞部に流入し、当該浄水フィルターを径方向外方に通過して前記浄水フィルターの外周面と前記ケーシングの側壁部との間の空間に流出し、前記流出部から外部に排出されるように構成されている、ポット型浄水器用浄水カートリッジを得た。
(2) Manufacture of water purification cartridge A water purification cartridge of a comparative example including the obtained water purification filter was manufactured. The water purification cartridge was manufactured in the same manner as in the first embodiment described above, the casing material was ABS resin, and the hardness was 95. The casing L2 was 92.0 mm and L3 was 89.2 mm. That is, the water purification filter includes a tubular casing having an inflow portion into which raw water flows in and an outflow portion through which purified water flows out, and a water purification filter housed inside the casing for filtering the raw water. It is formed in a cylindrical shape having elasticity and a cavity, and has first and second surfaces at both ends in the axial direction, respectively, and the casing covers the first surface of the water purification filter. A first cover portion, a second cover portion that covers the second surface of the water purification filter, and a side wall portion that covers the outer peripheral surface of the water purification filter are provided, and the first cover portion includes the outer periphery of the cavity portion. A first contact portion is formed in which the water purification filter is annularly contacted with the first surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The second cover portion has an outer periphery of the cavity portion. A second contact portion is formed in which the water purification filter is annularly contacted with the second surface of the water purification filter so as to surround the water purification filter, and the water purification filter is axially pressed to elastically deform. The water purification filter has the first contact portion and the second contact portion. The raw water, which is housed inside the casing in a state of being elastically deformed by the pressing force of the contact portion and has flowed in from the inflow portion of the casing, flows into the cavity portion of the water purification filter via the first cover portion. Then, it is configured to pass through the water purification filter outward in the radial direction, flow out into the space between the outer peripheral surface of the water purification filter and the side wall portion of the casing, and be discharged to the outside from the outflow portion. , Obtained a water purification cartridge for a pot-type water purifier.
(3)浄水器の製造
上記浄水カートリッジを、実施例1と同様に浄水器に取り付け、比較例のポット型浄水器を得た。
(3) Manufacture of water purifier The above water purification cartridge was attached to the water purifier in the same manner as in Example 1 to obtain a pot-type water purifier of Comparative Example.
(4)評価
(4−1)流量
JIS S 3201 2017 6.1 ろ過流量試験 c)1)に準じ、ろ過流量を測定、算出した。
(4−2)脱落した活性炭の原水貯留部への流入の評価
原水貯留部に水が溜まっている状態で、目視で脱落した活性炭の有無を確認した。
(4−3)リークの有無
実施例1、2及び比較例1、2に係る浄水カートリッジそれぞれに、初濃度2mg/Lの遊離残留塩素を通水し、リークの有無を確認した。また、実施例1、2及び比較例1、2に係る浄水カートリッジについて、通水後に浄水フィルターをケーシングから取り出し、ケーシングの第1接触部(第1突部)と接触していた部分と、第2接触部(第2突部)と接触していた部分との距離L4を測定し、距離L4の長さL1に対する割合W(%)から、浄水フィルターの弾性回復の程度を評価した。
(4) Evaluation (4-1) Flow rate The filtration flow rate was measured and calculated according to JIS S 3201 2017 6.1 Filtration flow rate test c) 1).
(4-2) Evaluation of inflow of dropped activated carbon into the raw water storage section With water accumulated in the raw water storage section, the presence or absence of the dropped activated carbon was visually confirmed.
(4-3) Presence or absence of leak The presence or absence of leak was confirmed by passing free residual chlorine having an initial concentration of 2 mg / L through each of the water purification cartridges according to Examples 1 and 2 and Comparative Examples 1 and 2. Further, regarding the water purification cartridges according to Examples 1 and 2 and Comparative Examples 1 and 2, the water purification filter was taken out from the casing after passing water, and the portion that was in contact with the first contact portion (first protrusion) of the casing and the second portion. The distance L4 between the two contact portions (second protrusions) and the portion in contact was measured, and the degree of elastic recovery of the water purification filter was evaluated from the ratio W (%) of the distance L4 to the length L1.
評価結果を表1に示す。 The evaluation results are shown in Table 1.
表1に示すように、実施例1及び2の浄水フィルターは、円筒形状である活性炭成型体を備え、原水が該円筒形状における径方向に通水される浄水フィルターであって、活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えることから、ポット型浄水器に適用した場合にも、充分な流量を有し、かつ、脱落した活性炭の原水貯留部への流入を低減するものであった。 As shown in Table 1, the water purification filters of Examples 1 and 2 include an activated carbon molded body having a cylindrical shape, and are water purification filters through which raw water is passed in the radial direction in the cylindrical shape of the activated carbon molded body. Since a non-woven fabric containing heat-sealing short fibers is provided on the side surface on the side where the raw water flows in, it has a sufficient flow rate even when applied to a pot-type water purifier, and the activated carbon that has fallen off is stored in the raw water. It was intended to reduce the inflow to the section.
一方、比較例1は、活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えず、連続繊維からなるスパンボンド不織布を備えるものであったことから、流量が充分でなく、浄水に時間がかかるものであった。 On the other hand, in Comparative Example 1, the side surface of the activated carbon molded product on the side where the raw water flows was not provided with the non-woven fabric containing the heat-sealing short fibers, but was provided with the spunbonded non-woven fabric made of continuous fibers. The flow rate was not sufficient and it took time to purify the water.
また、比較例2は、活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備えないものであったことから、脱落した活性炭の原水貯留部への流入が認められた。 Further, in Comparative Example 2, since the non-woven fabric containing the heat-sealing short fibers was not provided on the side surface of the activated carbon molded body on the side where the raw water flows, the fallen activated carbon flows into the raw water storage portion. Was recognized.
1 カートリッジ
2 ケーシング
3 浄水フィルター
20 第1カバー部
21 側壁部
22 第2カバー部
31 第1面
32 側周部
33 第2面
34 空洞部
35 活性炭成型体
36 活性炭成型体の径方向における内周側に配置される不織布
37 活性炭成型体の径方向における外周側に配置される不織布
203 面
207 流入部
208 第1突部(第1接触部)
221 面
223 流出部
224 第2突部(第2接触部)
230 空間
300 シート
1 Cartridge 2 Casing 3 Water purification filter 20 1st cover part 21 Side wall part 22 2nd cover part 31 1st surface 32 Side peripheral part 33 2nd surface 34 Cavity part 35 Activated carbon molded body 36 Inner peripheral side in the radial direction of the activated carbon molded body Non-woven fabric arranged in 37 Non-woven fabric arranged on the outer peripheral side in the radial direction of the activated carbon molded body 203 Surface 207 Inflow part 208 First protrusion (first contact part)
221 Surface 223 Outflow part 224 Second protrusion (second contact part)
230 space 300 seats
Claims (10)
前記活性炭成型体の前記原水が流入する側の側面に、熱融着性短繊維を含む不織布を備える、浄水フィルター。 A water purification filter having a cylindrically shaped activated carbon molded body through which raw water is passed in the radial direction in the cylindrical shape.
A water purification filter comprising a non-woven fabric containing heat-sealing short fibers on the side surface of the activated carbon molded product on the side where the raw water flows.
A pot-type water purifier including the water purification filter according to any one of claims 1 to 7.
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JPH0737682Y2 (en) * | 1989-05-31 | 1995-08-30 | 株式会社土屋製作所 | Activated carbon filter |
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US5580451A (en) * | 1995-05-01 | 1996-12-03 | Automotive Fluid Systems, Inc. | Air conditioning refrigerant fluid dryer assembly |
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CN114763279B (en) * | 2021-01-13 | 2023-11-28 | Lg电子株式会社 | Filter module for drinking device |
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