JP7200494B2 - Wet-laid non-woven fabric for filters - Google Patents
Wet-laid non-woven fabric for filters Download PDFInfo
- Publication number
- JP7200494B2 JP7200494B2 JP2018068385A JP2018068385A JP7200494B2 JP 7200494 B2 JP7200494 B2 JP 7200494B2 JP 2018068385 A JP2018068385 A JP 2018068385A JP 2018068385 A JP2018068385 A JP 2018068385A JP 7200494 B2 JP7200494 B2 JP 7200494B2
- Authority
- JP
- Japan
- Prior art keywords
- wet
- average fiber
- nonwoven fabric
- laid nonwoven
- dtex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
- Paper (AREA)
Description
本発明は、付着した異物の除去に優れたフィルター用湿式不織布に関するものである。 TECHNICAL FIELD The present invention relates to a wet-laid nonwoven fabric for filters, which is excellent in removing adhering foreign matter.
近年、空調用、エアコン用、自動車用フィルター等の分野において、濾材の高性能化、多様化の要請が急激に高まっている。使用によりフィルターに付着した異物は容易には除去できないため、フィルターの再利用は難しい状況にある。フィルターの再利用に関しては、例えば吸引ノズルを用いた粉塵除去方法がある（特許文献１）。 In recent years, in the fields of air conditioners, air conditioners, automobile filters, and the like, there has been a rapid increase in demand for higher performance and diversification of filter media. It is difficult to reuse the filter because the foreign matter adhering to the filter cannot be easily removed during use. Regarding the reuse of filters, there is a dust removal method using a suction nozzle, for example (Patent Document 1).
しかしながら、吸引ノズルを使用して異物を除去すると、フィルターが変形し、性能が十分に回復しないといった問題がある。 However, when the foreign matter is removed using the suction nozzle, there is a problem that the filter is deformed and the performance is not sufficiently recovered.
そこで本発明は、上記課題に鑑みなされ、その目的は、付着した異物を容易に除去でき、再利用可能なフィルター用湿式不織布を提供することにある。 Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a reusable wet-laid nonwoven fabric for filters, from which adhering foreign matter can be easily removed.
本発明者らは鋭意検討した結果、以下に示す手段により、上記課題を解決できることを見出し、本発明に到達した。すなわち本発明は以下の通りである。
（１）ビニロン、ポリエステル、及びポリビニルアルコールから構成され、通気の上流側に配置される面の表面粗さ（ＳＭＤ）が２．７μｍ以下であるフィルター用湿式不織布。
（２）通気の上流側に配置される面の平均摩擦係数（ＭＩＵ）が０．１５以下である（１）に記載のフィルター用湿式不織布。
（３）前記ポリビニルアルコールを１０～２０重量％含有している（１）または（２）に記載のフィルター用湿式不織布。
（４）繊維長３０ｍｍ以下の繊維から成ることを特徴とする（１）～（３）のいずれか１つに記載のフィルター用湿式不織布。
（５）ポリアクリル酸エステルを０．００１～０．１重量％含有している（１）～（４）のいずれか１つに記載のフィルター用湿式不織布。
（６）（１）～（５）のいずれか１つに記載のフィルター用湿式不織布を用いたフィルター。
As a result of intensive studies, the inventors of the present invention have found that the above problems can be solved by means shown below, and have completed the present invention. That is, the present invention is as follows.
(1) A wet-laid nonwoven fabric for filters, which is composed of vinylon, polyester, and polyvinyl alcohol, and has a surface roughness (SMD) of 2.7 μm or less on the surface located on the upstream side of ventilation.
(2) The wet-laid nonwoven fabric for filters according to (1), wherein the average friction coefficient (MIU) of the surface arranged on the upstream side of ventilation is 0.15 or less.
(3) The wet-laid nonwoven fabric for filters according to (1) or (2), which contains 10 to 20% by weight of the polyvinyl alcohol.
(4) The wet-laid nonwoven fabric for filters according to any one of (1) to (3), which is made of fibers having a fiber length of 30 mm or less.
(5) The wet-laid nonwoven fabric for filters according to any one of (1) to (4), containing 0.001 to 0.1% by weight of polyacrylate.
(6) A filter using the wet-laid nonwoven fabric for filters according to any one of (1) to (5).
本発明のフィルター用湿式不織布は、通気の上流側に配置される面が平坦であるため、簡易に異物を除去できる。そのため、本発明のフィルター用湿式不織布を用いたフィルターの清掃を容易にすることができる。 Since the wet-laid nonwoven fabric for filters of the present invention has a flat surface arranged on the upstream side of ventilation, foreign substances can be easily removed. Therefore, cleaning of the filter using the wet-laid nonwoven fabric for filters of the present invention can be facilitated.
以下、本発明の実施形態について詳細に説明する。
本実施形態の湿式不織布は、ビニロン、ポリエステル、及びポリビニルアルコールから構成され、前記ポリビニルアルコールを１０～２０重量％含有しており、通気の上流側に配置される面の表面粗さ（ＳＭＤ）が２．７μｍ以下であり、フィルターに用いられる。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail.
The wet-laid nonwoven fabric of the present embodiment is composed of vinylon, polyester, and polyvinyl alcohol, and contains 10 to 20% by weight of the polyvinyl alcohol. It is 2.7 μm or less and is used for filters.
本明細書において表面粗さとは、カトーテック製摩擦感テスター（ＫＥＳ－ＳＥ）による評価において、表面の凹凸データの平均偏差を示すＳＭＤの値である。ＳＭＤの値が大きくなるに従い、表面が粗く、凹凸性を有していることを示す。 The term "surface roughness" as used herein refers to an SMD value that indicates the average deviation of surface unevenness data as evaluated by a Kato Tech friction tester (KES-SE). As the SMD value increases, it indicates that the surface is rougher and has unevenness.
本実施形態の湿式不織布は、通気の上流側に配置される面の表面粗さ（ＳＭＤ）が２．７μｍ以下である。２．７μｍよりも大きいと、付着した異物が表面の凹凸性により除去し難い。 The wet-laid nonwoven fabric of this embodiment has a surface roughness (SMD) of 2.7 μm or less on the surface arranged on the upstream side of ventilation. If it is larger than 2.7 μm, it is difficult to remove the adhering foreign matter due to the unevenness of the surface.
本明細書において平均摩擦係数とは、カトーテック製摩擦感テスター（ＫＥＳ－ＳＥ）による評価において測定される表面の滑り度合いの平均摩擦係数（ＭＩＵ）の値である。ＭＩＵの値が小さくなるに従い、表面が滑り易いことを示す。 The average friction coefficient as used herein is the value of the average friction coefficient (MIU) of the degree of slippage of the surface measured in the evaluation by Kato Tech Co., Ltd.'s friction tester (KES-SE). A smaller MIU value indicates a slippery surface.
本実施形態の湿式不織布は、通気の上流側に配置される面の平均摩擦係数を示すＭＩＵが０．１５である。０．１５よりも大きいと、付着した異物が表面の摩擦により除去し難い。 The wet-laid nonwoven fabric of this embodiment has an MIU of 0.15, which indicates the average coefficient of friction of the surface arranged on the upstream side of ventilation. When it is larger than 0.15, it is difficult to remove adhering foreign matter due to surface friction.
本実施形態の湿式不織布を構成する繊維の平均繊維径は、１～１００μｍが好ましく、５～５０μｍがより好ましい。構成繊維の平均繊維径が１μｍよりも小さいと、繊維間の空隙も狭くなり、空気中の塵埃がカバー層上に堆積し、通気抵抗が急上昇する。構成繊維の平均繊維径が１００μｍよりも大きいと、異物を除去し難くなる。 The average fiber diameter of the fibers constituting the wet-laid nonwoven fabric of this embodiment is preferably 1 to 100 μm, more preferably 5 to 50 μm. If the average fiber diameter of the constituent fibers is less than 1 μm, the gaps between the fibers become narrow, dust in the air accumulates on the cover layer, and the ventilation resistance rises sharply. If the average fiber diameter of the constituent fibers is greater than 100 µm, it becomes difficult to remove foreign matter.
本実施形態の濾材の不織布Ｂを構成する繊維の繊維長は３０ｍｍ以下が好ましい。繊維長が３０ｍｍよりも大きいと、繊維が厚み方向に配向しやすくなり、表面粗さが大きくなる。 The fiber length of the fibers constituting the nonwoven fabric B of the filter medium of this embodiment is preferably 30 mm or less. If the fiber length is longer than 30 mm, the fibers tend to be oriented in the thickness direction, resulting in increased surface roughness.
本実施形態の湿式不織布は、厚みが０．１～３．０ｍｍであることが好ましい。厚みが０．１ｍｍよりも小さいと地合いの問題が生じる。厚みが３．０ｍｍよりも大きいとフィルター全体の厚みが大き過ぎ、フィルターをプリーツ状にした場合に構造抵抗が大きくなり、結果としてフィルター全体での通気抵抗が高くなり過ぎ、実用上問題がある。 The wet-laid nonwoven fabric of this embodiment preferably has a thickness of 0.1 to 3.0 mm. If the thickness is less than 0.1 mm, formation problems arise. If the thickness is more than 3.0 mm, the overall thickness of the filter is too large, and when the filter is pleated, the structural resistance increases.
本実施形態の湿式不織布は、目付量が１０～１００ｇ／ｍ２であることが好ましく、２０～８０ｇ／ｍ２がより好ましい。目付が１０ｇ／ｍ２未満であれば地合いが悪くなる。目付が１００ｇ／ｍ２を越えると、厚みが大きくなり、フィルターに用いる際にプリーツ加工時の構造抵抗が大きくなる。 The wet-laid nonwoven fabric of the present embodiment preferably has a basis weight of 10 to 100 g/m 2 , more preferably 20 to 80 g/m 2 . If the basis weight is less than 10 g/m 2 , the texture is poor. If the weight per unit area exceeds 100 g/m 2 , the thickness increases and the structural resistance increases during pleating when used for filters.
本実施形態の湿式不織布を構成する繊維構造体の素材は、ビニロン、ポリエステル、及びポリビニルアルコールから構成されている。ここで、ポリビニルアルコールを１０～２０重量％含有しているのが好ましい。１０％未満であると、湿式不織布の腰強度が弱く、更には表面平滑性が得られにくい。２０重量％よりも多いと、通気抵抗が上がってしまう。 The material of the fibrous structure constituting the wet-laid nonwoven fabric of this embodiment is composed of vinylon, polyester, and polyvinyl alcohol. Here, it is preferable to contain 10 to 20% by weight of polyvinyl alcohol. If it is less than 10%, the wet-laid nonwoven fabric will have low stiffness, and it will be difficult to obtain surface smoothness. If it is more than 20% by weight, the ventilation resistance will increase.
本実施形態の湿式不織布は、ポリアクリル酸エステルは０．００１～０．１重量％含有していることが好ましい。０．００１％未満であると、表面平滑性及び表面滑り性が向上せず、０．１重量%よりも多くなると、通気抵抗が上がってしまう。 The wet-laid nonwoven fabric of this embodiment preferably contains 0.001 to 0.1% by weight of polyacrylate. If it is less than 0.001% by weight, the surface smoothness and surface slipperiness will not be improved, and if it is more than 0.1% by weight, the ventilation resistance will increase.
本実施形態の湿式不織布は、公知の湿式抄紙法により公知の抄紙機で製造することが可能である。 The wet-laid nonwoven fabric of the present embodiment can be produced by a known wet-laid papermaking method using a known paper machine.
以下に実施例を示し、本発明をより具体的に説明するが、本発明は実施例に記載されたものに限定されない。まず、実施例および比較例で用いた湿式不織布の物性の測定方法について説明する。 EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to those described in the examples. First, the method for measuring the physical properties of the wet-laid nonwoven fabrics used in Examples and Comparative Examples will be described.
［表面凹凸性］
評価はカトーテック製、摩擦感テスター（ＫＥＳ－ＳＥ）にて評価を行う。テーブルに固定した試料（不織布）を１ｍｍ／ｓの速度で、１０ｇｆの荷重をかけながら、接触子を掃引させ、検出された表面凹凸データの平均偏差を表面粗さ（ＳＭＤ）の値とする。
[Surface unevenness]
The evaluation is performed using a friction tester (KES-SE) manufactured by Kato Tech. The sample (nonwoven fabric) fixed on the table is swept at a speed of 1 mm/s while applying a load of 10 gf, and the average deviation of the detected surface unevenness data is taken as the surface roughness (SMD) value.
［平均摩擦係数］
評価はカトーテック製、摩擦感テスター（ＫＥＳ－ＳＥ）にて評価を行う。テーブルに固定した試料を１ｍｍ／ｓの速度で、２５ｇｆの荷重をかけながら、接触子を掃引させ、検出された平均摩擦係数（ＭＩＵ）を算出する。
[Average coefficient of friction]
The evaluation is performed using a friction tester (KES-SE) manufactured by Kato Tech. The sample fixed on the table is swept with a load of 25 gf at a speed of 1 mm/s, and the detected average coefficient of friction (MIU) is calculated.
［異物除去性］
１５ｃｍ角のサイズに試料を切り取り、ＪＩＳ１５種粉塵を５ｍ３／ｍｉｎにて負荷させ、通気抵抗がベースよりも５０Ｐａアップした時点で負荷を止める。試料に捕集された粉塵量を重量にて評価する。そして１５ｃｍ角の試料を机上に対して垂直に治具に設置し、高さ１０ｃｍのところから１０回落とす。最後に試料の重量を測り、試料から落ちた重量を確認する。試料から落ちた重量が付着量の７割であれば、異物除去性能は良好である（○）との判定とする。
[Foreign matter removal]
A sample of 15 cm square was cut and loaded with JIS class 15 dust at 5 m 3 /min. The amount of dust collected on the sample is evaluated by weight. Then, a 15 cm square sample is placed on a jig perpendicularly to the desk and dropped 10 times from a height of 10 cm. Finally, the sample is weighed to determine the weight that has fallen off the sample. If the weight dropped from the sample is 70% of the adhered amount, it is determined that the foreign matter removing performance is good (○).
〔参考例１〕
ビニロン繊維（１７ｄｔｅｘ、平均繊維長１２ｍｍ、平均繊維径４０μｍ）、ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、２６：３１．２５：５．２５：１１．２５：１１．２５：１５の重量比で混繊し、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付４０ｇ／ｍ２、厚み０．３ｍｍの実施例１の湿式不織布を得た。
[ Reference Example 1]
Vinylon fiber (17 dtex, average fiber length 12 mm, average fiber diameter 40 μm), vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester Fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm), polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm) were mixed at a weight ratio of 26:31.25:5.25:11.25:11.25:15 and dispersed in water with a pulper to prepare a stock solution for wet papermaking.
This wet papermaking stock solution is made into paper by a short-mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140°C to obtain a basis weight of 40 g/m2 and a thickness of 0.3 mm. A wet-laid nonwoven fabric of No. 1 was obtained.
〔実施例２〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）、ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、５１：７．６：１６．２：１６．２：９の重量比で混繊し、更にポリアクリル酸エステルを投入した繊維重量に対して０．０５％となるように測り、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの実施例２の湿式不織布を得た。
[Example 2]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm), polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm ), polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 51: 7.6: 16.2: 16 Fibers were mixed at a weight ratio of 2:9, and polyacrylic acid ester was weighed to be 0.05% based on the weight of the fibers added, and dispersed in water with a pulper to prepare a stock solution for wet papermaking.
This wet papermaking stock solution is made into paper by a short-mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140° C. to obtain a basis weight of 30 g/m 2 and a thickness of 0.2 mm. A wet-laid nonwoven of Example 2 was obtained.
〔実施例３〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、４５：７．６：１６．２：１６．２：１５の重量比で混繊し、更にポリアクリル酸エステルを投入した繊維重量に対して０．０５％となるように測り、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの実施例３の湿式不織布を得た。
[Example 3]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm) , polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 45:7.6:16.2:16. Fibers were mixed at a weight ratio of 2:15, and polyacrylic ester was weighed so as to be 0.05% based on the weight of the fibers added, and dispersed in water with a pulper to prepare a stock solution for wet papermaking.
This wet papermaking stock solution is made into paper by a short-mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140° C. to obtain a basis weight of 30 g/m 2 and a thickness of 0.2 mm. A wet-laid nonwoven of Example 3 was obtained.
〔参考例２〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、３９：７．６：１６．２：１６．２：２１の重量比で混繊し、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの実施例４の湿式不織布を得た。
[ Reference example 2 ]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm) , polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 39:7.6:16.2:16. The fibers were mixed at a weight ratio of 2:21 and dispersed in water with a pulper to prepare a stock solution for wet papermaking.
This stock solution for papermaking is made into paper by a short-mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140° C. to achieve a basis weight of 30 g/m 2 and a thickness of 0.2 mm. of the wet-laid nonwoven fabric was obtained.
〔実施例５〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、４５：７．６：１６．２：１６．２：１５の重量比で混繊し、更にポリアクリル酸エステルを投入した繊維重量に対して０．１５％となるように測り、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの実施例５の湿式不織布を得た。
[Example 5]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm) , polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 45:7.6:16.2:16. Fibers were mixed at a weight ratio of 2:15, and polyacrylic acid ester was weighed so as to be 0.15% with respect to the fiber weight added, and dispersed in water with a pulper to prepare a stock solution for wet papermaking.
This wet papermaking stock solution is made into paper by a short-mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140° C. to obtain a basis weight of 30 g/m 2 and a thickness of 0.2 mm. A wet-laid nonwoven of Example 5 was obtained.
〔比較例１〕
低融点ポリエステル繊維（２２ｄｔｅｘ、平均繊維長６４ｍｍ、平均繊維径４５μｍ）、低融点ポリエステル繊維（４．４ｄｔｅｘ、平均繊維長５１ｍｍ、平均繊維径２０μｍ）、レギュラーポリエステル繊維（１７ｄｔｅｘ、平均繊維長５１ｍｍ、平均繊維径４０μｍ）を、重量比５：３：２で混繊し、サーマルボンド法により、厚み０．２ｍｍ、目付６５ｇ／ｍ２、の比較例１のサーマルボンド不織布を得た。
[Comparative Example 1]
Low melting point polyester fiber (22 dtex, average fiber length 64 mm, average fiber diameter 45 μm), low melting point polyester fiber (4.4 dtex, average fiber length 51 mm, average fiber diameter 20 μm), regular polyester fiber (17 dtex, average fiber length 51 mm, average A fiber diameter of 40 μm) was mixed at a weight ratio of 5:3:2, and a thermal bonded nonwoven fabric of Comparative Example 1 having a thickness of 0.2 mm and a basis weight of 65 g/m 2 was obtained by the thermal bonding method.
〔比較例２〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、５１：７．６：１６．２：１６．２：９の重量比で混繊し、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの比較例２の湿式不織布を得た。
[Comparative Example 2]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm) , polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 51:7.6:16.2:16. The fibers were mixed at a weight ratio of 2:9 and dispersed in water using a pulper to prepare a stock solution for wet papermaking.
This wet papermaking undiluted solution is made into paper by a short - mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140°C. A wet-laid nonwoven of Example 2 was obtained.
〔比較例３〕
ビニロン繊維（７ｄｔｅｘ、平均繊維長１０ｍｍ、平均繊維径２５μｍ）、ビニロン繊維（２．２ｄｔｅｘ、平均繊維長６ｍｍ、平均繊維径１５μｍ）ポリエステル繊維（０．６ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径８μｍ）、ポリエステル繊維（２．２ｄｔｅｘ、平均繊維長５ｍｍ、平均繊維径１５μｍ）、ＰＶＡ繊維（１．１ｄｔｅｘ、平均繊維長３ｍｍ、平均繊維径１０μｍ）を、４５：７．６：１６．２：１６．２：１５の重量比で混繊し、更にポリアクリル酸エステルを投入した繊維重量に対して０．０００９％となるように測り、パルパーで水中に分散させ、湿式抄紙用原液を調整した。
この湿式抄紙用原液を短網式抄紙法にて抄紙して湿潤ウェッブをつくり、その後プレスローラーで軽く絞り１４０℃で回転乾燥ドラムにて乾燥し、目付３０ｇ／ｍ２、厚み０．２ｍｍの比較例３の湿式不織布を得た。
[Comparative Example 3]
Vinylon fiber (7 dtex, average fiber length 10 mm, average fiber diameter 25 μm), vinylon fiber (2.2 dtex, average fiber length 6 mm, average fiber diameter 15 μm) polyester fiber (0.6 dtex, average fiber length 5 mm, average fiber diameter 8 μm) , polyester fiber (2.2 dtex, average fiber length 5 mm, average fiber diameter 15 μm), PVA fiber (1.1 dtex, average fiber length 3 mm, average fiber diameter 10 μm), 45:7.6:16.2:16. Fibers were mixed at a weight ratio of 2:15, and polyacrylic acid ester was added so that the weight of the fibers was 0.0009%.
This wet papermaking undiluted solution is made into paper by a short - mesh papermaking method to form a wet web, which is then lightly squeezed with a press roller and dried with a rotary drying drum at 140°C. A wet-laid nonwoven of Example 3 was obtained.
表１に実施例及び比較例の湿式不織布の評価を示す。 Table 1 shows the evaluation of the wet-laid nonwoven fabrics of Examples and Comparative Examples.
表１から、通気の上流に配置される面の表面粗さ（ＳＭＤ）が２．７μｍ以下である湿式不織布を用いることで、異物の除去性能に優れることが分かる。つまり、本発明のフィルター用湿式不織布を用いたフィルターの清掃を容易にすることができる。 From Table 1, it can be seen that the use of a wet-laid nonwoven fabric having a surface roughness (SMD) of 2.7 μm or less on the surface located upstream of the airflow provides excellent foreign matter removal performance. In other words, it is possible to facilitate the cleaning of filters using the wet-laid nonwoven fabric for filters of the present invention.
なお、上記開示した実施の形態および各実施例はすべて例示であり制限的なものではない。また、実施の形態および各実施例で開示した構成を適宜組み合わせた実施の形態や実施例も本発明に含まれる。つまり、本発明の技術的範囲は、特許請求の範囲によって有効であり、特許請求の範囲の記載と均等の意味および範囲内のすべての変更・修正・置き換え等を含むものである。 It should be noted that the above-disclosed embodiments and examples are all examples and are not restrictive. The present invention also includes embodiments and examples in which the configurations disclosed in the embodiments and examples are appropriately combined. In other words, the technical scope of the present invention is valid according to the scope of the claims, and includes all changes, modifications, replacements, etc. within the meaning and scope of equivalents to the description of the scope of the claims.
本発明のフィルター用不織布は、フィルターを清掃する際の異物除去に対して優れており、空調用フィルター、エアコン用フィルター、自動車用フィルター等のフィルター全般に有効に利用できる。 The nonwoven fabric for filters of the present invention is excellent in removing foreign matter when cleaning filters, and can be effectively used for filters in general, such as filters for air conditioners, filters for air conditioners, and filters for automobiles.
Claims (5)
通気の上流側に配置される面の表面粗さ（カトーテック製摩擦感テスター（ＫＥＳ－ＳＥ）による評価において、表面の凹凸データの平均偏差を示すＳＭＤ）が２．７μｍ以下であり、
前記繊維はポリアクリル酸エステルを０．００１～０．１重量％含有しており、
前記繊維の平均繊維径１～１００μｍであり、
目付１０～１００ｇ／ｍ ２ 、厚み０．１～３．０ｍｍである、ことを特徴とするフィルター用湿式不織布。 A nonwoven fabric composed of fibers made of vinylon, polyester, and polyvinyl alcohol,
The surface roughness of the surface arranged on the upstream side of the ventilation (SMD indicating the average deviation of surface unevenness data in evaluation by Kato Tech's friction tester (KES-SE)) is 2.7 μm or less,
The fiber contains 0.001 to 0.1% by weight of polyacrylate ,
The average fiber diameter of the fibers is 1 to 100 μm,
A wet-laid nonwoven fabric for filters, characterized by having a basis weight of 10 to 100 g/m 2 and a thickness of 0.1 to 3.0 mm .
徴とする請求項１に記載のフィルター用湿式不織布。 2. The wet-laid nonwoven fabric for filters according to claim 1, wherein the average coefficient of friction (MIU) of the surface arranged on the upstream side of ventilation is 0.15 or less.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018068385A JP7200494B2 (en) | 2018-03-30 | 2018-03-30 | Wet-laid non-woven fabric for filters |
| PCT/JP2019/012395 WO2019188923A1 (en) | 2018-03-30 | 2019-03-25 | Wet non-woven fabric for filter, filter medium for filter, and filter |
| EP19777006.8A EP3777991A4 (en) | 2018-03-30 | 2019-03-25 | WET NON-WOVEN FOR FILTER, FILTER MEDIA FOR FILTER AND FILTER |
| US17/040,655 US20210016213A1 (en) | 2018-03-30 | 2019-03-25 | Wet non-woven fabric for filter, filter medium for filter, and filter |
| CN201980023208.6A CN111971105A (en) | 2018-03-30 | 2019-03-25 | Wet-type nonwoven fabric for filter, filter medium for filter, and filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018068385A JP7200494B2 (en) | 2018-03-30 | 2018-03-30 | Wet-laid non-woven fabric for filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2019177349A JP2019177349A (en) | 2019-10-17 |
| JP7200494B2 true JP7200494B2 (en) | 2023-01-10 |
Family
ID=68277336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018068385A Active JP7200494B2 (en) | 2018-03-30 | 2018-03-30 | Wet-laid non-woven fabric for filters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7200494B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009242973A (en) | 2008-03-31 | 2009-10-22 | Toray Ind Inc | Textile using cellulose fiber |
| WO2009139194A1 (en) | 2008-05-16 | 2009-11-19 | ミドリホクヨー株式会社 | Topcoat |
| JP2012218284A (en) | 2011-04-08 | 2012-11-12 | Toyobo Co Ltd | Surface decorative film having tattile impression of plain wood |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3290755B2 (en) * | 1993-06-01 | 2002-06-10 | 旭化成株式会社 | Spacer sheet for beverage containers |
| JP3653863B2 (en) * | 1995-06-07 | 2005-06-02 | 東レ株式会社 | Non-woven fabric for liquid filter and liquid filtration apparatus using the same |
-
2018
- 2018-03-30 JP JP2018068385A patent/JP7200494B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009242973A (en) | 2008-03-31 | 2009-10-22 | Toray Ind Inc | Textile using cellulose fiber |
| WO2009139194A1 (en) | 2008-05-16 | 2009-11-19 | ミドリホクヨー株式会社 | Topcoat |
| JP2012218284A (en) | 2011-04-08 | 2012-11-12 | Toyobo Co Ltd | Surface decorative film having tattile impression of plain wood |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019177349A (en) | 2019-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2987544B1 (en) | Filter material for air filter, method for manufacturing same, and air filter provided with same | |
| JP6668203B2 (en) | Manufacturing method of filter medium for air filter | |
| JP6158061B2 (en) | Air filter media | |
| JP7200494B2 (en) | Wet-laid non-woven fabric for filters | |
| JP4110628B2 (en) | Fabric and manufacturing method thereof | |
| WO2019188923A1 (en) | Wet non-woven fabric for filter, filter medium for filter, and filter | |
| JP4556318B2 (en) | Heat resistant fabric and filter comprising the same | |
| JP7424298B2 (en) | Filter media and filters | |
| JP2023152337A (en) | Filter medium for air filter and its manufacturing method | |
| JPH08196829A (en) | Air cleaning filter medium and method for producing the same | |
| WO2021054465A1 (en) | Non-woven fabric | |
| JP3114079B2 (en) | Filter material made of non-woven fabric for removing salt and air filter using the same | |
| WO2024203820A1 (en) | Laminated filter medium and air filter | |
| JPH0456645B2 (en) | ||
| JP7281419B2 (en) | Filter material for filter and manufacturing method thereof | |
| JP6276044B2 (en) | Gas turbine intake air filter | |
| JP3991576B2 (en) | FILTER ELEMENT, MANUFACTURING METHOD THEREOF, AND FILTER | |
| JP7200495B2 (en) | Filter media and filters | |
| JP7117174B2 (en) | glass filter | |
| JP2004209470A (en) | Air filter media, air filter and washing regeneration filter | |
| JP4254893B2 (en) | Fabric and manufacturing method thereof | |
| JP4741748B2 (en) | Disposable paper bag filter for vacuum cleaner and manufacturing method thereof | |
| JP2521111B2 (en) | Filter medium for air cleaner of internal combustion engine and manufacturing method thereof | |
| JP2014054595A (en) | Filter medium for air filter | |
| JP6858678B2 (en) | Filter media for air filters and their manufacturing methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20210215 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20211130 |
|
| A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20220127 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20220325 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20220628 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20220824 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20221122 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20221205 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 7200494 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |