JP2019177349A - Wet non-woven fabric - Google Patents
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- JP2019177349A JP2019177349A JP2018068385A JP2018068385A JP2019177349A JP 2019177349 A JP2019177349 A JP 2019177349A JP 2018068385 A JP2018068385 A JP 2018068385A JP 2018068385 A JP2018068385 A JP 2018068385A JP 2019177349 A JP2019177349 A JP 2019177349A
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Abstract
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。 The present invention relates to a wet nonwoven fabric for a filter excellent in the removal of attached 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 conditioning, air conditioning, automobile filters, etc., there has been a rapid increase in demand for high performance and diversification of filter media. Since the foreign matters adhering to the filter due to use cannot be easily removed, it is difficult to reuse the filter. Regarding the reuse of the filter, for example, there is a dust removal method using a suction nozzle (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。 Then, this invention is made | formed in view of the said subject, The objective is to provide the wet nonwoven fabric for filters which can remove the adhering foreign material easily and can be reused.
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 present inventors have found that the above problems can be solved by the following means, and have reached the present invention. That is, the present invention is as follows.
(1) A wet nonwoven fabric for a filter composed of vinylon, polyester, and polyvinyl alcohol, and having a surface roughness (SMD) of a surface disposed on the upstream side of ventilation of 2.7 μm or less.
(2) The wet nonwoven fabric for a filter according to (1), wherein an average friction coefficient (MIU) of a surface disposed on the upstream side of ventilation is 0.15 or less.
(3) The wet nonwoven fabric for filters according to (1) or (2), containing 10 to 20% by weight of the polyvinyl alcohol.
(4) The wet nonwoven fabric for a filter according to any one of (1) to (3), comprising a fiber having a fiber length of 30 mm or less.
(5) The wet nonwoven fabric for filters according to any one of (1) to (4), which contains 0.001 to 0.1% by weight of a polyacrylic acid ester.
(6) A filter using the wet nonwoven fabric for a filter 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 disposed on the upstream side of ventilation, foreign matters can be easily removed. Therefore, cleaning of the filter using the wet 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。
Hereinafter, embodiments of the present invention will be described in detail.
The wet nonwoven fabric of this embodiment is composed of vinylon, polyester, and polyvinyl alcohol, contains 10 to 20% by weight of the polyvinyl alcohol, and has a surface roughness (SMD) of the surface disposed on the upstream side of the ventilation. 2.7 μm or less, 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。 In this specification, the surface roughness is a value of SMD indicating an average deviation of surface irregularity data in evaluation by a Kato Tech friction tester (KES-SE). As the value of SMD increases, the surface is rough 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。 In the wet nonwoven fabric of this embodiment, the surface roughness (SMD) of the surface disposed on the upstream side of ventilation is 2.7 μm or less. When it is larger than 2.7 μm, the adhered foreign matter is difficult to remove 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。 In this specification, the average friction coefficient is a value of the average friction coefficient (MIU) of the degree of slippage of the surface measured in the evaluation with a Kato Tech friction feeling tester (KES-SE). As the MIU value decreases, the surface tends to slip.
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。 In the wet nonwoven fabric of this embodiment, MIU indicating the average friction coefficient of the surface disposed on the upstream side of ventilation is 0.15. If it is larger than 0.15, the adhered foreign matter is difficult to remove 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。 1-100 micrometers is preferable and, as for the average fiber diameter of the fiber which comprises the wet nonwoven fabric of this embodiment, 5-50 micrometers is more preferable. When the average fiber diameter of the constituent fibers is smaller than 1 μm, the gap between the fibers becomes narrow, dust in the air accumulates on the cover layer, and the airflow resistance increases rapidly. When the average fiber diameter of the constituent fibers is larger than 100 μm, it is difficult to remove foreign matters.
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。 As for the fiber length of the fiber which comprises the nonwoven fabric B of the filter medium of this embodiment, 30 mm or less is preferable. When the fiber length is longer than 30 mm, the fibers are easily oriented in the thickness direction, and the surface roughness is increased.
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 nonwoven fabric of this embodiment preferably has a thickness of 0.1 to 3.0 mm. If the thickness is smaller than 0.1 mm, a problem of formation occurs. If the thickness is larger than 3.0 mm, the thickness of the entire filter is too large, and when the filter is pleated, the structural resistance increases, resulting in excessively high ventilation resistance in the entire filter, which is problematic in practice.
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 nonwoven fabric of this embodiment preferably has a basis weight of 10 to 100 g / m 2 and more preferably 20 to 80 g / m 2 . If the basis weight is less than 10 g / m 2 , the texture becomes poor. If the basis weight exceeds 100 g / m 2 , the thickness increases, and the structural resistance during pleating increases when used in a filter.
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 fiber structure constituting the wet nonwoven fabric of the present embodiment is composed of vinylon, polyester, and polyvinyl alcohol. Here, it is preferable to contain 10 to 20% by weight of polyvinyl alcohol. When it is less than 10%, the wet strength of the wet nonwoven fabric is weak, and furthermore, it is difficult to obtain surface smoothness. When it is more than 20% by weight, the ventilation resistance is increased.
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。 It is preferable that the wet nonwoven fabric of this embodiment contains 0.001-0.1 weight% of polyacrylic acid ester. If it is less than 0.001%, surface smoothness and surface slipperiness will not be improved, and if it exceeds 0.1% by weight, 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 nonwoven fabric of this embodiment can be manufactured with a known paper machine by a known wet paper making method.
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 Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to those described in the examples. First, the measuring method of the physical property of the wet nonwoven fabric used by the Example and the comparative example is demonstrated.
［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]
Evaluation is performed by a friction tester (KES-SE) manufactured by Kato Tech. The sample (nonwoven fabric) fixed on the table is swept while applying a load of 10 gf at a speed of 1 mm / s, and the average deviation of the detected surface roughness data is defined as the value of surface roughness (SMD).
［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 friction coefficient]
Evaluation is performed by a friction tester (KES-SE) manufactured by Kato Tech. The sample fixed on the table is swept while applying a load of 25 gf at a speed of 1 mm / s, and the detected average friction coefficient (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 is cut to a size of 15 cm square, JIS 15 seed dust is loaded at 5 m 3 / min, and the load is stopped when the ventilation resistance is increased by 50 Pa from the base. The amount of dust collected on the sample is evaluated by weight. Then, a 15 cm square sample is placed on a jig perpendicular to the desk, and dropped 10 times from a height of 10 cm. Finally, weigh the sample and check the weight dropped from the sample. If the weight dropped from the sample is 70% of the adhesion amount, it is determined that the foreign matter removal performance is good (◯).
〔実施例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。
[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) was 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 wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type paper making method to form a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 40 g / m 2 and a thickness of 0.3 mm. The wet nonwoven fabric of Example 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 The mixture was mixed at a weight ratio of .2: 9 and further measured to be 0.05% with respect to the weight of the fiber charged with polyacrylate, and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type papermaking method to form a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 30 g / m 2 and a thickness of 0.2 mm. The wet nonwoven fabric 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. The mixture was mixed at a weight ratio of 2:15, and measured to be 0.05% with respect to the weight of the fiber charged with polyacrylate, and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type papermaking method to form a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 30 g / m 2 and a thickness of 0.2 mm. The wet nonwoven fabric of Example 3 was obtained.
〔実施例４〕
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。
Example 4
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 mixture was mixed at a weight ratio of 2:21 and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This paper stock solution is made by a short net-type paper making method to form a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., and has a basis weight of 30 g / m 2 and a thickness of 0.2 mm. 4 wet nonwoven fabrics were 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. The mixture was mixed at a weight ratio of 2:15, and further measured to 0.15% with respect to the weight of the fiber charged with polyacrylate, and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type papermaking method to form a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 30 g / m 2 and a thickness of 0.2 mm. The wet nonwoven fabric 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) Fiber diameter 40 μm) was mixed at a weight ratio of 5: 3: 2, and a thermal bond 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 a thermal bond 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 mixture was mixed at a weight ratio of 2: 9 and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type paper making method to make a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 30 g / m 2 and a thickness of 0.2 mm. The wet nonwoven fabric 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. The mixture was mixed at a weight ratio of 2:15 and further measured to 0.0009% with respect to the weight of the fiber charged with polyacrylate, and dispersed in water with a pulper to prepare a wet papermaking stock solution.
This wet papermaking stock solution is made by a short net-type paper making method to make a wet web, and then lightly drawn by a press roller and dried by a rotary drying drum at 140 ° C., with a basis weight of 30 g / m 2 and a thickness of 0.2 mm. The wet nonwoven fabric 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 wet 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。 It can be seen from Table 1 that the use of a wet nonwoven fabric having a surface roughness (SMD) of a surface disposed upstream of ventilation of 2.7 μm or less provides excellent foreign matter removal performance. That is, cleaning of the filter using the wet nonwoven fabric for filters of the present invention can be facilitated.
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。 The disclosed embodiments and examples are all illustrative and not restrictive. In addition, embodiments and examples in which the configurations disclosed in the embodiments and the examples are appropriately combined are also included in the present invention. In other words, the technical scope of the present invention is effective by the scope of the claims, and includes all changes, modifications, replacements, and the like within the meaning and scope equivalent to the description of the scope of 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 non-woven fabric for filter of the present invention is excellent for removing foreign matters when cleaning the filter, and can be effectively used for all filters such as an air-conditioning filter, an air-conditioning filter, and an automobile filter.
Claims (6)
通気の上流側に配置される面の表面粗さ（ＳＭＤ）が２．７μｍ以下であることを特徴とするフィルター用湿式不織布。 Consists of vinylon, polyester, and polyvinyl alcohol,
A wet nonwoven fabric for a filter, wherein a surface roughness (SMD) of a surface disposed on the upstream side of ventilation is 2.7 μm or less.
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| CN201980023208.6A CN111971105A (en) | 2018-03-30 | 2019-03-25 | Wet-type nonwoven fabric for filter, filter medium for filter, and filter |
| PCT/JP2019/012395 WO2019188923A1 (en) | 2018-03-30 | 2019-03-25 | Wet non-woven fabric for filter, filter medium 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 |
| EP19777006.8A EP3777991A4 (en) | 2018-03-30 | 2019-03-25 | Wet non-woven fabric for filter, filter medium for filter, and filter |
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| JPH06340043A (en) * | 1993-06-01 | 1994-12-13 | Asahi Chem Ind Co Ltd | Spacer sheet for beverage container |
| JPH0959859A (en) * | 1995-06-07 | 1997-03-04 | Toray Ind Inc | Nonwoven fabric for liquid filter and liquid filtering apparatus obtained by using the same |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06340043A (en) * | 1993-06-01 | 1994-12-13 | Asahi Chem Ind Co Ltd | Spacer sheet for beverage container |
| JPH0959859A (en) * | 1995-06-07 | 1997-03-04 | Toray Ind Inc | Nonwoven fabric for liquid filter and liquid filtering apparatus obtained by using the same |
| 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 |
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