JP6594609B2 - Filter medium for deodorizing filter - Google Patents
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- JP6594609B2 JP6594609B2 JP2014115616A JP2014115616A JP6594609B2 JP 6594609 B2 JP6594609 B2 JP 6594609B2 JP 2014115616 A JP2014115616 A JP 2014115616A JP 2014115616 A JP2014115616 A JP 2014115616A JP 6594609 B2 JP6594609 B2 JP 6594609B2
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Description
本発明は接着性と剛性に優れ、低圧力損失、高効率、高粉塵保持量を有する脱臭フィルター用濾材に関するものである。 The present invention relates to a filter medium for a deodorizing filter having excellent adhesiveness and rigidity, low pressure loss, high efficiency, and high dust holding capacity.
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、低コストの要求が高まってきており、除塵性能と脱臭性能を両立するフィルター用濾材の検討が多くなされている。一般に脱臭性能を付与するには、粒子状あるいは繊維状の吸着剤と接着剤を用いてシート化する方法が多く採用されており、例えば基材間に粒状吸着剤と粒状接着剤の混合物を散布し、これを加熱接着してなる吸着濾材が開発されている(例えば、特許文献1)。しかしながら、かかる吸着濾材は接着強度が弱いため、吸着剤の脱落や剛性の低下という問題があった。 In recent years, in the fields of air conditioners, air conditioners, and automobile filters, there has been an increasing demand for high performance and low cost filter media, and many studies have been made on filter media that achieve both dust removal performance and deodorization performance. . In general, in order to impart deodorizing performance, a method of forming a sheet using a particulate or fibrous adsorbent and an adhesive is often employed. For example, a mixture of a granular adsorbent and a granular adhesive is sprayed between substrates. However, an adsorption filter medium obtained by heat-bonding this has been developed (for example, Patent Document 1). However, such an adsorbent filter medium has a problem in that the adsorbent falls off and the rigidity decreases because the adhesive strength is weak.
これらの問題を解決するには、接着剤の混合比率を高める方法が挙げられるが、吸着剤表面への被膜による脱臭性能の低下や、圧力損失の増加を引き起こす。特許文献2では、ニードルパンチ不織布層と吸着層が隣接しており、かかるニードルパンチ不織布の毛羽が吸着層に入り込み、アンカー効果によって接着強度を高めているが、濾材表面の毛羽が著しい場合、外観品位を損ない好ましくなく、また剛性も不十分であった。 In order to solve these problems, there is a method of increasing the mixing ratio of the adhesive, but it causes a decrease in deodorizing performance due to a coating on the surface of the adsorbent and an increase in pressure loss. In Patent Document 2, the needle punched nonwoven fabric layer and the adsorbing layer are adjacent to each other, and the fluff of the needle punched nonwoven fabric enters the adsorbing layer to increase the adhesive strength by the anchor effect. It was not preferable because the quality was impaired, and the rigidity was insufficient.
本発明は接着性と剛性を高めながらも脱臭性能を十分に発揮でき、圧力損失や粒子捕集効率、粉塵保持量に優れた脱臭フィルター用濾材を提供することを課題とする。 It is an object of the present invention to provide a filter medium for a deodorizing filter that can sufficiently exhibit deodorizing performance while improving adhesion and rigidity, and is excellent in pressure loss, particle collection efficiency, and dust holding amount.
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。本発明は以下のとおりである。
(1) 基材層間に吸着剤と接着剤からなる吸着層を10〜450g/m2挟み込んだ積層構造体からなる濾材であって、基材層の少なくとも一層が目付5〜40g/m2である熱融着系長繊維からなる不織布とメルトブロー不織布を積層した積層シートであり、吸着層と前記積層シートの熱融着系長繊維からなる不織布が隣接するように積層され、熱融着されている脱臭フィルター用濾材。
(2)前記熱融着系長繊維からなる不織布が、芯鞘構造の複合熱融着系長繊維からなる不織布である(1)に記載の脱臭フィルター用濾材。
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. The present invention is as follows.
(1) A filter medium composed of a laminated structure in which an adsorbent layer made of an adsorbent and an adhesive is sandwiched between 10 to 450 g / m 2 between base material layers, and at least one base material layer has a basis weight of 5 to 40 g / m 2 It is a laminated sheet in which a non-woven fabric made of a certain heat-sealing long fiber and a melt blown non-woven fabric are laminated, and the adsorbing layer and the non-woven fabric made of a heat-welding long fiber of the laminated sheet are laminated so as to be adjacent to each other and heat-sealed. Filter media for deodorizing filters.
(2) The filter medium for a deodorizing filter according to (1), wherein the nonwoven fabric composed of the heat-sealing long fibers is a nonwoven fabric composed of composite heat-sealing long fibers having a core-sheath structure.
本発明は接着性と剛性に優れ、さらに低圧力損失、高効率、高粉塵保持量を有する脱臭フィルター用濾材を提供することができる。 The present invention can provide a filter medium for a deodorizing filter that is excellent in adhesiveness and rigidity, and further has low pressure loss, high efficiency, and high dust holding capacity.
本発明は基材層間に吸着剤と接着剤からなる吸着層を挟み込んだ積層構造体からなる濾材であって、基材層の少なくとも一層が熱融着系長繊維からなる不織布とメルトブロー不織布を積層した積層シートであり、吸着層と前記積層シートの熱融着系長繊維からなる不織布が隣接するように積層され、熱融着系長繊維からなる不織布の低融点成分と吸着層が熱融着により強固に接着していることを特徴とする脱臭フィルター用濾材である。 The present invention is a filter medium composed of a laminated structure in which an adsorbent layer made of an adsorbent and an adhesive is sandwiched between base materials, and at least one layer of the base material layer is laminated with a non-woven fabric made of heat-bonded long fibers and a melt blown non-woven fabric. The laminated sheet is laminated such that the adsorbing layer and the non-woven fabric composed of the heat-sealing long fibers of the laminating sheet are adjacent to each other, and the low melting point component of the non-woven fabric composed of the heat-sealing long fibers and the adsorbing layer are heat-sealed. It is the filter medium for deodorizing filters characterized by adhering more firmly.
熱融着系短繊維からなる不織布では、熱融着系短繊維の低融点成分と吸着剤は接着するものの、短繊維が厚み方向にも動きやすいため、吸着剤の自由度が大きく、濾材として十分な剛性が得られない。それに対し、熱融着系長繊維からなる不織布であれば、繊維は厚み方向へ動きづらいため、熱融着系長繊維からなる不織布に接着した吸着剤の自由度が小さく、濾材として高い剛性が得られる。 In non-woven fabrics composed of heat-bonding short fibers, the low-melting-point component of heat-bonding short fibers and the adsorbent adhere, but the short fibers are easy to move in the thickness direction. Sufficient rigidity cannot be obtained. On the other hand, if the nonwoven fabric is made of heat-bonded long fibers, the fibers are difficult to move in the thickness direction, so the degree of freedom of the adsorbent bonded to the nonwoven fabric made of heat-bonded long fibers is small, and the filter medium has high rigidity. can get.
本発明の熱融着系長繊維からなる不織布は、芯鞘構造の複合長繊維を構成繊維とし、芯部の素材は高融点であるポリエチレンテレフタレート、ポリブチレンテレフタレート等であることが好ましく、鞘部の素材は低融点であるポリエチレン、ポリプロピレン、低融点ポリエステル等であることが好ましい。
熱融着系長繊維が芯鞘構造であれば鞘部分が熱融着により減少しても、芯部分が残っているため熱融着系長繊維からなる不織布の平面性は損なわれず、繊維が厚み方向に動くことはないため、濾材として高い剛性を維持することができる。
The nonwoven fabric composed of the heat-sealing long fibers of the present invention is preferably composed of a core-sheath composite long fiber as a constituent fiber, and the core material is preferably a high melting point polyethylene terephthalate, polybutylene terephthalate, or the like. The material is preferably polyethylene, polypropylene, low melting point polyester or the like having a low melting point.
If the heat-sealable long fiber is a core-sheath structure, even if the sheath part is decreased by heat-sealing, the flatness of the nonwoven fabric made of the heat-sealable long fiber is not impaired because the core part remains, and the fiber Since it does not move in the thickness direction, high rigidity can be maintained as a filter medium.
本発明の熱融着系長繊維からなる不織布の目付は5〜40g/m2であり、10〜30g/m2が好ましい。目付が5g/m2未満では吸着層と熱融着する面積が小さく、十分な接着強度が得られない。一方、40g/m2を超えると、繊維本数の増加に伴い圧力損失が高くなるばかりか、繊維間の粉塵保持空間が減少し、粉塵保持量が低下する。 Basis weight of the nonwoven fabric made of heat fusion type long fiber of the present invention is 5~40g / m 2, 10~30g / m 2 is preferred. If the basis weight is less than 5 g / m 2 , the area to be heat-sealed with the adsorption layer is small, and sufficient adhesive strength cannot be obtained. On the other hand, when it exceeds 40 g / m 2 , not only the pressure loss increases as the number of fibers increases, but also the dust holding space between the fibers decreases and the dust holding amount decreases.
本発明の熱融着系長繊維からなる不織布を構成する熱融着系長繊維の繊維径は3〜100μmが好ましく、5〜80μmがより好ましく、10〜60μmがさらに好ましい。かかる範囲であれば、柔軟性を保持しつつ、吸着層とメルトブロー不織布をつなぎ止め、接着強度の向上と高剛性化の役割を十分に果たすことができるからである。 The fiber diameter of the heat-sealing long fibers constituting the nonwoven fabric composed of the heat-sealing long fibers of the present invention is preferably from 3 to 100 μm, more preferably from 5 to 80 μm, even more preferably from 10 to 60 μm. This is because, within such a range, the adsorbing layer and the melt blown nonwoven fabric can be held together while maintaining flexibility, and the role of improving the adhesive strength and increasing the rigidity can be sufficiently achieved.
本発明のメルトブロー不織布は特に限定するものではないが、素材としてはポリオレフィン、ポリエステル、ポリ乳酸、ポリカーボネート、ポリ塩化ビニル、ポリ塩化ビニリデン等の樹脂が挙げられ、なかでもポリプロピレンが好ましい。 The melt blown nonwoven fabric of the present invention is not particularly limited, but examples of the material include resins such as polyolefin, polyester, polylactic acid, polycarbonate, polyvinyl chloride, and polyvinylidene chloride, and polypropylene is preferable.
本発明のメルトブロー不織布の目付は5〜100g/m2が好ましく、10〜60g/m2がより好ましい。目付が5g/m2未満では繊維本数が少ないため、高い捕集効率が得られない。一方、100g/m2を超えると、圧力損失が高くなる。 Basis weight of the meltblown nonwoven fabric of the present invention is preferably 5~100g / m 2, 10~60g / m 2 is more preferable. When the basis weight is less than 5 g / m 2 , since the number of fibers is small, high collection efficiency cannot be obtained. On the other hand, when it exceeds 100 g / m 2 , the pressure loss increases.
本発明のメルトブロー不織布を構成する繊維の繊維径は1〜20μmが好ましく、1〜10μmがより好ましい。繊維径が1μm未満であると、圧力損失が増加するばかりでなく、粉塵負荷時の圧力損失の上昇が早いため、フィルターの使用寿命が短くなる。繊維径が20μmを超えると、高い捕集効率が得られない。 1-20 micrometers is preferable and, as for the fiber diameter of the fiber which comprises the melt blown nonwoven fabric of this invention, 1-10 micrometers is more preferable. When the fiber diameter is less than 1 μm, not only the pressure loss increases, but also the pressure loss at the time of dust loading increases rapidly, so the service life of the filter is shortened. When the fiber diameter exceeds 20 μm, high collection efficiency cannot be obtained.
熱融着系長繊維からなる不織布とメルトブロー不織布との積層方法は、特に限定するものではないが、熱融着系長繊維からなる不織布を構成する長繊維の低融点成分の融点以上で加熱する方法が好ましい。加熱方法としては、メルトブロー不織布と熱融着系長繊維からなる不織布を2つの加熱ロールの間に同時挿入し、両ロールの間隙を調整して加熱プレスする方法が挙げられる。
その他にも接着性樹脂をスプレーする方法や、またニードルパンチを用いた方法も適用できる。
The method for laminating the non-woven fabric composed of heat-bonded long fibers and the melt-blown non-woven fabric is not particularly limited, but heating is performed at a temperature equal to or higher than the melting point of the low melting point component of the long fibers constituting the non-woven fabric composed of heat-bonded long fibers. The method is preferred. Examples of the heating method include a method in which a melt-blown nonwoven fabric and a nonwoven fabric composed of heat-bonding long fibers are simultaneously inserted between two heating rolls, and the gap between the two rolls is adjusted and heat-pressed.
In addition, a method of spraying an adhesive resin and a method using a needle punch can be applied.
本発明における吸着剤は、粉末状、粒状、破砕状、造粒状、ビーズ状が挙げられるが、幅広く種々のガスを吸着できる活性炭系が好ましい。例えば、ヤシガラ系、木質系、石炭系、ピッチ系等の活性炭が好適である。表面観察によって見られる内部への導入孔いわゆるマクロ孔数は多い方がよい。活性炭と熱可塑性粉末樹脂から混合粉粒体をつくった際に、熱可塑性粉末樹脂が活性炭表面を被覆しても、熱プレス加工時に細孔内部からのガス脱着により、吸着可能な細孔を開放することができる。また、活性炭表面はある程度粗い方が溶融した樹脂の流動性も悪くなり、吸着性能低下を抑えることができる。 Examples of the adsorbent in the present invention include powder, granule, crushed, granulated, and bead-like, and an activated carbon system that can adsorb a wide variety of gases is preferable. For example, activated carbon such as coconut shell, wood, coal, and pitch is suitable. It is better that the number of so-called macropores introduced into the interior as seen by surface observation is large. When mixed powder is made from activated carbon and thermoplastic powder resin, the adsorbable pores are opened by gas desorption from the inside of the pores during hot press processing, even if the thermoplastic powder resin coats the activated carbon surface. can do. Further, if the surface of the activated carbon is rough to some extent, the fluidity of the melted resin is also deteriorated, and a decrease in adsorption performance can be suppressed.
本発明の吸着剤の粒径範囲は通気性、吸着材の脱落、シート加工性等を考慮して、JIS標準ふるい(JIS Z8801)による値で60〜1000μmが好ましく、100〜900μmがより好ましい。粒径範囲が60μm未満では、一定の高吸着容量を得るのに圧力損失が大きくなりすぎ、またシート充填密度が高くなるために粉塵負荷時の圧力損失の上昇が早くなり、粉塵保持量が低下する。1000μmを超える場合には、シートからの脱落が生じ易くなり、またワンパスでの初期吸着性能が極端に低くなり、更にはプリーツ形状及び波状等の空気浄化用フィルターユニットとしたときの折り曲げ、及び波状加工時の加工性が悪くなる。なお、上記の粒状粉粒状吸着剤は、通常の分級機を使用して所定の粒度調整をすることにより、得ることが可能である。 The particle size range of the adsorbent of the present invention is preferably 60 to 1000 μm, more preferably 100 to 900 μm as a value according to JIS standard sieve (JIS Z8801) in consideration of air permeability, adsorbent dropping, sheet processability and the like. If the particle size range is less than 60 μm, the pressure loss becomes too large to obtain a certain high adsorption capacity, and the sheet packing density increases, so the pressure loss rises quickly when the dust is loaded, and the dust holding amount decreases. To do. If it exceeds 1000 μm, it will be easy to drop off from the sheet, and the initial adsorption performance in one pass will become extremely low. Furthermore, it will be bent and corrugated when it is used as a pleated or corrugated air purification filter unit. Workability at the time of processing deteriorates. In addition, said granular powder granular adsorbent can be obtained by carrying out predetermined particle size adjustment using a normal classifier.
本発明の濾材の基材層間に挟み込まれる吸着剤の量は10〜450g/m2であり、50〜350g/m2が好ましい。かかる範囲であれば、圧力損失の大幅な上昇を抑えつつ、十分な脱臭性能を得ることができる。 The amount of the adsorbent sandwiched between the base materials of the filter medium of the present invention is 10 to 450 g / m 2 , and preferably 50 to 350 g / m 2 . If it is this range, sufficient deodorizing performance can be obtained, suppressing the big raise of a pressure loss.
本発明の脱臭フィルター用濾材に用いられる吸着剤は、極性物質やアルデヒド類の吸着性能を向上することを目的として、薬品処理を施して用いてもよい。ガス薬品処理に用いられる薬品としては、アルデヒド系ガスやNOx等の窒素化合物、SOx等の硫黄化合物、酢酸等の酸性の極性物質に対しては、例えばエタノールアミン、ポリエチレンイミン、アニリン、P−アニシジン、スルファニル酸等のアミン系薬剤や水酸化ナトリウム、水酸化カリウム、炭酸グアニジン、リン酸グアニジン、アミノグアニジン硫酸塩、5.5−ジメチルヒダントイン、ベンゾグアナミン、2.2−イミノジエタノール、2.2.2−ニトロトリエタノール、エタノールアミン塩酸塩、2−アミノエタノール、2.2−イミノジエタノール塩酸塩、P−アミノ安息香酸、スルファニル酸ナトリウム、L−アルギニン、メチルアミン塩酸塩、セミカルバジド塩酸塩、ヒドラジン、ヒドロキノン、硫酸ヒドロキシルアミン、過マンガン酸塩、炭酸カリウム、炭酸水素カリウム等が好適に用いられ、アンモニア、メチルアミン、トリメチルアミン、ピリジン等の塩基性の極性物質に対しては、例えば、リン酸、クエン酸、リンゴ酸、アスコルビン酸、酒石酸等が好適に用いられる。これら薬品処理した吸着剤は、薬品処理していない吸着剤と混合して使用しても良い。なお、薬品処理は、例えば、吸着剤に薬品を担持させたり、添着することにより行う。また、吸着剤に直接薬品を処理する以外に、シート面表面付近に通常のコーティング法等で添着加工する方法やシート全体に含浸添着することも可能である。この際、アルギン酸ソーダやポリエチレンオキサイド等の増粘剤を混入した薬品水溶液をつくり、これを担持、添着を実施する方法もできる。この方法では水への溶解度が低い薬品を担持、添着し、更に薬品の脱落を抑制するのにも有効である。 The adsorbent used in the filter medium for the deodorizing filter of the present invention may be used after chemical treatment for the purpose of improving the adsorption performance of polar substances and aldehydes. Examples of chemicals used in gas chemical treatment include aldehyde gases, nitrogen compounds such as NOx, sulfur compounds such as SOx, and acidic polar substances such as acetic acid such as ethanolamine, polyethyleneimine, aniline, and P-anisidine. , Amine drugs such as sulfanilic acid, sodium hydroxide, potassium hydroxide, guanidine carbonate, guanidine phosphate, aminoguanidine sulfate, 5.5-dimethylhydantoin, benzoguanamine, 2.2-iminodiethanol, 2.2.2 -Nitrotriethanol, ethanolamine hydrochloride, 2-aminoethanol, 2.2-iminodiethanol hydrochloride, P-aminobenzoic acid, sodium sulfanilate, L-arginine, methylamine hydrochloride, semicarbazide hydrochloride, hydrazine, hydroquinone , Hydroxyla sulfate , Permanganate, potassium carbonate, potassium hydrogen carbonate, etc. are preferably used. For basic polar substances such as ammonia, methylamine, trimethylamine, pyridine, phosphoric acid, citric acid, malic acid, etc. Ascorbic acid, tartaric acid and the like are preferably used. These chemical-treated adsorbents may be used in admixture with non-chemically treated adsorbents. The chemical treatment is performed, for example, by supporting or attaching a chemical to the adsorbent. In addition to directly treating the adsorbent with chemicals, it is also possible to impregnate and adhere to the entire surface of the sheet, such as a method of performing an adhesion process near the surface of the sheet by a normal coating method or the like. At this time, a chemical aqueous solution in which a thickener such as sodium alginate or polyethylene oxide is mixed can be prepared, supported, and attached. This method is effective in supporting and attaching a chemical having low solubility in water and further suppressing the chemical from falling off.
本発明に使用する接着剤は、熱可塑性粉末樹脂であることが好ましい。粉末樹脂であれば吸着剤および前記積層シートの毛羽や低融点部分に均一に分散することができる。熱可塑性粉末樹脂の種類としては、ポリオレフィン系、ポリアミド系、ポリエステル系、エチレン―アクリル共重合体等が挙げられる。 The adhesive used in the present invention is preferably a thermoplastic powder resin. If it is powder resin, it can disperse | distribute uniformly to the fluff and low melting | fusing point part of adsorption agent and the said lamination sheet. Examples of the thermoplastic powder resin include polyolefin, polyamide, polyester, and ethylene-acrylic copolymers.
本発明の接着剤に使用する熱可塑性粉末樹脂の大きさは平均で1〜40μmが好ましく、5〜30μmがより好ましい。さらに好ましくは1〜40μmの範囲に95重量%以上が含まれることである。かかる範囲の粒子径であれば、熱可塑性樹脂が、粉粒状吸着剤の表面細孔を塞ぐことを低減できる一方、吸着剤との混合時にファンデルワールス力や静電気力による粉粒状吸着剤への予備接着が有効になされ、均一に分散することができ、吸着剤層と基材層の部分的剥離を効果的に防止することができるからである。 The average size of the thermoplastic powder resin used in the adhesive of the present invention is preferably 1 to 40 μm, and more preferably 5 to 30 μm. More preferably, it is 95% by weight or more in the range of 1 to 40 μm. If the particle size is within this range, the thermoplastic resin can reduce blocking of the surface pores of the granular adsorbent, while at the time of mixing with the adsorbent, the van der Waals force or electrostatic force to the granular adsorbent. This is because the preliminary adhesion is effectively performed and can be uniformly dispersed, and the partial peeling between the adsorbent layer and the base material layer can be effectively prevented.
本発明の接着剤に使用する熱可塑性粉末樹脂の形状は特に規定はないが、球状、破砕状等があげられる。当然ながら、2種以上の熱可塑性粉末樹脂を併用もできる。さらには、薬品担持した粉粒状吸着剤あるいは薬品担持した基材不織布を使用した場合でもこの処方であれば、粉粒状吸着剤表面に熱可塑性粉末樹脂がドライ状態の混合時から仮接着した状態になるため仮に該薬品が相異なる性質のものであっても後のシート化工程でも互いに干渉することを避けることができるので充分な効果が発揮される。 The shape of the thermoplastic powder resin used for the adhesive of the present invention is not particularly limited, but examples thereof include a spherical shape and a crushed shape. Of course, two or more thermoplastic powder resins can be used in combination. Furthermore, even when a chemical-supported granular adsorbent or a chemical-supported non-woven fabric is used, if the prescription is used, the thermoplastic powder resin is temporarily bonded to the surface of the granular adsorbent from the time of dry mixing. Therefore, even if the chemicals have different properties, they can be prevented from interfering with each other in the subsequent sheet forming step, so that a sufficient effect is exhibited.
本発明の脱臭フィルター用濾材に含まれる熱可塑性粉末樹脂の量は粉粒状吸着剤に対して1〜40重量%使用するのが好ましく、3〜30重量%使用するのがより好ましい。かかる範囲内であれば、基材層との接着力、圧力損失、脱臭性能に優れる脱臭フィルター用濾材が得られるからである。 The amount of the thermoplastic powder resin contained in the filter medium for the deodorizing filter of the present invention is preferably 1 to 40% by weight, more preferably 3 to 30% by weight, based on the granular adsorbent. This is because, within such a range, a filter material for a deodorizing filter excellent in adhesive strength with the base material layer, pressure loss, and deodorizing performance can be obtained.
本発明の脱臭フィルター用濾材は、抗菌剤、抗かび剤、抗ウイルス剤、難燃剤等の付随的機能を有する成分等を含めて構成してもよい。これらの成分は繊維類や不織布、織物中に練り込んでも、後加工で添着、及び担持して付与してもよい。例えば、難燃剤を含めて構成することにより、FMVSS.302で規定されている遅燃性の基準やUL難燃規格に合致した脱臭フィルター用濾材を製造することが可能である。 The filter medium for a deodorizing filter of the present invention may be configured to include components having incidental functions such as antibacterial agents, antifungal agents, antiviral agents, flame retardants, and the like. These components may be kneaded into fibers, non-woven fabrics, or woven fabrics, or may be attached and supported by post-processing. For example, by including a flame retardant, FMVSS. It is possible to produce a filter medium for a deodorizing filter that meets the standards for retarding flame retardancy defined in 302 and UL flame retardant standards.
本発明の脱臭フィルター用濾材を最終的に熱プレスしシート製造するにはよく使用されるロール間熱プレス法、あるいは上下ともフラットな熱ベルトコンベヤー間にはさみこむフラットベッドラミネート法等があげられる。より均一な厚み、接着状態をつくりだすには後者の方がより好ましい。また、本特許で記載する基材不織布と上記製法の特徴の組み合わせにより、粉粒状吸着剤同志の過度の結着を抑制することができると同時に、基材不織布との実用上充分な接着強力を得ることができる。 For example, a hot press method between rolls, which is often used for producing a sheet by finally hot pressing the filter medium for the deodorizing filter of the present invention, or a flat bed laminating method in which the upper and lower flat belt belts are sandwiched between the belts. The latter is more preferable for producing a more uniform thickness and adhesion. In addition, the combination of the base nonwoven fabric described in this patent and the characteristics of the above production method can suppress excessive binding between the particulate adsorbents, and at the same time has practically sufficient adhesive strength with the base nonwoven fabric. Obtainable.
本発明の脱臭フィルター用濾材の製法について説明する。まずは、吸着剤と接着剤を所定の重量秤量し、攪拌機に入れ、約10分間回転速度30rpmで攪拌する。次にこの混合粉末を熱融着系長繊維からなる不織布とメルトブロー不織布を積層した積層シートの熱融着系長繊維からなる不織布側に散布し、さらにその上から基材層を重ね合わせ、熱プレス処理を行なう。熱プレスの際のシート表面温度は熱可塑性樹脂の融点の3〜30℃、好ましくは5〜20℃高いのが好ましい。なお、吸着剤と接着剤からなる吸着層の上に重ね合わせる基材層については、特に限定はしないが、サーマルボンド不織布を使用することが好ましい。 The manufacturing method of the filter medium for deodorizing filters of this invention is demonstrated. First, the adsorbent and the adhesive are weighed to a predetermined weight, put in a stirrer, and stirred at a rotational speed of 30 rpm for about 10 minutes. Next, this mixed powder is sprayed on the nonwoven fabric side consisting of the thermal fusion long fibers of the laminated sheet in which the nonwoven fabric consisting of the thermal fusion long fibers and the melt blown nonwoven fabric are laminated, and the base material layer is further laminated thereon to heat Press processing. The sheet surface temperature during hot pressing is preferably 3 to 30 ° C., preferably 5 to 20 ° C. higher than the melting point of the thermoplastic resin. In addition, although it does not specifically limit about the base material layer superimposed on the adsorption layer which consists of adsorption agent and an adhesive agent, It is preferable to use a thermal bond nonwoven fabric.
本発明の脱臭フィルター用濾材の厚みは0.1〜3.0mmが好ましく、0.5〜2.0mmがより好ましい。厚みが0.1mm以下であれば粉塵捕集空間が小さいため、粉塵負荷時の圧力損失の上昇が早く、目詰まりが発生する。また3.0mmを超えるとシート全体の厚みが厚すぎるため、プリーツ状ユニットとした場合に構造抵抗が大きくなり、結果としてユニット全体での圧力損失が高くなり過ぎ実用上問題がある。 0.1-3.0 mm is preferable and, as for the thickness of the filter material for deodorizing filters of this invention, 0.5-2.0 mm is more preferable. If the thickness is 0.1 mm or less, the dust collection space is small, so that the pressure loss rises quickly when the dust is loaded, and clogging occurs. On the other hand, if the thickness exceeds 3.0 mm, the thickness of the entire sheet is too thick, so that when the pleated unit is used, the structural resistance increases, and as a result, the pressure loss in the entire unit becomes too high, causing a practical problem.
本発明の脱臭フィルター用濾材の目付は、30〜500g/m2であることが好ましい。30g/m2未満であれば濾材の剛性が弱いため、通風負荷時にユニットが変形し、圧力損失が増大する。500g/m2を超えると、シート厚みが厚くなるためプリーツ状ユニットとした場合の構造抵抗が大きくなり実用上問題となる。 The basis weight of the filter medium for the deodorizing filter of the present invention is preferably 30 to 500 g / m 2 . If it is less than 30 g / m 2 , the rigidity of the filter medium is weak, so the unit is deformed at the time of ventilation load, and the pressure loss increases. If it exceeds 500 g / m 2 , the sheet thickness increases, so that the structural resistance in the case of a pleated unit is increased, which is a practical problem.
本発明の脱臭フィルター用濾材を使用したプリーツ状フィルターユニットの厚みは、10〜400mmが好ましい。カーエアコンに内蔵装着をはじめとする車載用途や家庭用空気清浄機であれば、通常の内部スペースの関係から、10〜60mm程度、ビル空調用途へよく設置される大型のフィルターユニットであれば40〜400mm程度が収納スペースから考えると好ましい。 The thickness of the pleated filter unit using the filter medium for the deodorizing filter of the present invention is preferably 10 to 400 mm. For in-vehicle applications such as built-in car air conditioners and home air purifiers, 40 to approximately 10 to 60 mm, a large filter unit that is often installed for building air conditioning applications, due to the normal internal space. About ~ 400 mm is preferable considering the storage space.
以下に実施例を示し、本発明をより具体的に説明する。実施例中に示した特性は以下の方法で測定した。 The following examples illustrate the present invention more specifically. The characteristics shown in the examples were measured by the following methods.
(濾材の圧力損失)
濾材をダクト内に設置し、空気濾過速度が31cm/秒になるよう大気を通気させ、濾材の上流、下流の静圧差を差圧計にて読み取り、圧力損失(Pa)を測定した。
(Pressure loss of filter media)
The filter medium was installed in the duct, the atmosphere was vented so that the air filtration speed was 31 cm / sec, the difference in static pressure upstream and downstream of the filter medium was read with a differential pressure gauge, and the pressure loss (Pa) was measured.
(0.3μm粒子捕集効率)
濾材をダクト内に設置し、空気濾過速度が16cm/秒になるよう大気を通気させ、濾材の上流、下流の0.3〜0.5μm粒子の個数濃度をパーティクルカウンターにて計測し、次式にて粒子捕集効率を算出した。
粒子捕集効率(%)=[1−(下流側濃度/上流側濃度)]×100
(0.3 μm particle collection efficiency)
The filter medium is installed in the duct, the atmosphere is vented so that the air filtration speed is 16 cm / sec, and the number concentration of 0.3 to 0.5 μm particles upstream and downstream of the filter medium is measured with a particle counter. The particle collection efficiency was calculated at
Particle collection efficiency (%) = [1− (downstream concentration / upstream concentration)] × 100
(接着強度)
上流側、下流側の基材層間の平均剥離強度を測定。試験片のサイズは巾50mm、長さ200mmとして、引張強度100mm/分として実施した。
(Adhesive strength)
Measure the average peel strength between the upstream and downstream substrate layers. The size of the test piece was 50 mm wide, 200 mm long, and the tensile strength was 100 mm / min.
(剛性)
JIS L−1096 A法(ガーレ法)に準拠し、MD方向の剛軟度を測定した。
(rigidity)
Based on JIS L-1096 A method (Gurley method), the bending resistance in the MD direction was measured.
(トルエン除去効率)
濾材をダクト内に設置し、空気濾過速度が16cm/秒になるよう大気を通気させ、濾材の上流側の濃度が80ppmになるようにトルエンガスを注入する。測定開始から1分後の上下流側濃度を炭化水素計にて測定し、次式にてトルエンガスの初期除去効率を算出した。
トルエン除去効率(%)=[1−(下流側濃度/上流側濃度)]×100
(Toluene removal efficiency)
The filter medium is placed in the duct, the atmosphere is vented so that the air filtration speed is 16 cm / sec, and toluene gas is injected so that the upstream concentration of the filter medium is 80 ppm. The upstream / downstream concentration after 1 minute from the start of measurement was measured with a hydrocarbon meter, and the initial removal efficiency of toluene gas was calculated by the following equation.
Toluene removal efficiency (%) = [1− (downstream concentration / upstream concentration)] × 100
(フィルターの圧力損失)
フィルターをダクト内に設置し、空気濾過速度が31cm/秒になるよう大気を通気させ、フィルターの上流、下流の静圧差を差圧計にて読み取り、圧力損失(Pa)を測定した。
(Filter pressure loss)
The filter was installed in the duct, the atmosphere was vented so that the air filtration rate was 31 cm / sec, the difference in static pressure upstream and downstream of the filter was read with a differential pressure gauge, and the pressure loss (Pa) was measured.
(ASHRAE粉塵保持量)
フィルターをダクト内に設置し、空気濾過速度が31cm/秒になるように大気を通気させ、フィルター上流側からASHRAE粉塵を1.0g/m3の濃度にて負荷し、圧力損失が200Paになるまで粉塵を負荷した。この時の試験時間中に投入した粉塵保持量を計測し、粉塵保持量(g/個)とした。
(ASHRAE dust holding amount)
A filter is installed in the duct, the atmosphere is vented so that the air filtration speed is 31 cm / sec, ASHRAE dust is loaded at a concentration of 1.0 g / m 3 from the upstream side of the filter, and the pressure loss becomes 200 Pa. Dust loaded up to. The amount of dust retained during the test time at this time was measured and used as the amount of dust retained (g / piece).
〔実施例1〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付12g/m2、繊維径30μm)を接着性樹脂を用いて積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付210g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
[Example 1]
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 12 g / m 2 of polypropylene, fiber diameter 30 μm) was laminated and integrated using an adhesive resin. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 210g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例2〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付12g/m2、繊維径30μm)を接着性樹脂を用いて積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
[Example 2]
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 12 g / m 2 of polypropylene, fiber diameter 30 μm) was laminated and integrated using an adhesive resin. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例3〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付12g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 3
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 12 g / m 2 of polypropylene, fiber diameter 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例4〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付20g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 4
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 20 g / m 2 of polypropylene, fiber diameter 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例5〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付12g/m2、繊維径30μm)をニードルパンチにて積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 5
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 12 g / m 2 of polypropylene, fiber diameter 30 μm) was laminated and integrated with a needle punch. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例6〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付20g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付368g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 6
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 20 g / m 2 of polypropylene, fiber diameter 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. It spread | dispersed so that it might become 368 g / m < 2 > of fabric weight, Furthermore, the thermal bond nonwoven fabric of 77 g / m < 2 > of fabric weight was piled up from the top, and the sheet-formation was performed by 140 degreeC heat processing. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例7〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付20g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付105g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 7
Meltblown nonwoven fabric (basis weight 20 g / m 2, fiber diameter 6.5 [mu] m) and a polyester (core) / polyethylene (sheath) consists configured heat-fusible type long-fiber nonwoven fabric (basis weight 20 g / m 2 of polypropylene, fiber diameter 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 105 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔実施例8〕
ポリプロピレンからなるメルトブロー不織布(目付30g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付20g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付105g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
Example 8
Non-woven fabric (weighing 20 g / m 2 , fiber diameter) consisting of heat-bonded long fibers composed of a melt blown nonwoven fabric made of polypropylene (30 g / m 2 basis weight, fiber diameter 6.5 μm) and polyester (core) / polyethylene (sheath) 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 105 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔比較例1〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、120℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
[Comparative Example 1]
Mixing a 1:50 weight ratio of flow beads EA209 manufactured by Sumitomo Seika Co., Ltd. as a thermoplastic powder resin with an average particle size of 550 μm to a melt blown nonwoven fabric made of polypropylene (20 g / m 2 basis weight, fiber diameter 6.5 μm) powder was sprayed so that the basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 120 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔比較例2〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付50g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付315g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
[Comparative Example 2]
Non-woven fabric (50 g / m 2 basis weight, fiber diameter) consisting of heat-bonded long fibers composed of a melt blown nonwoven fabric made of polypropylene (20 g / m 2 basis weight, fiber diameter 6.5 μm) and polyester (core) / polyethylene (sheath) 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 315 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
〔比較例3〕
ポリプロピレンからなるメルトブロー不織布(目付20g/m2、繊維径6.5μm)とポリエステル(芯)/ポリエチレン(鞘)で構成される熱融着系長繊維からなる不織布(目付50g/m2、繊維径30μm)を2本の加熱ロールでニップすることで積層一体化した。得られた積層シートの熱融着系長繊維からなる不織布側へ、平均粒径550μmのヤシガラ活性炭および熱可塑性粉末樹脂として住友精化製フロービーズEA209の重量比1:0.05の混合粉末を目付630g/m2になるように散布し、さらに上から目付77g/m2のサーマルボンド不織布を重ね合わせ、140℃の加熱処理にてシート化を行なった。この濾材をプリーツ機にて山高さ28mm、ピッチ6mmのプリーツ状に加工し、外形200mm×200mmのフィルターを作製した。
得られた濾材およびフィルターの各種測定結果を表1に記載した。
[Comparative Example 3]
Non-woven fabric (50 g / m 2 basis weight, fiber diameter) consisting of heat-bonded long fibers composed of a melt blown nonwoven fabric made of polypropylene (20 g / m 2 basis weight, fiber diameter 6.5 μm) and polyester (core) / polyethylene (sheath) 30 [mu] m) was nipped by two heating rolls and laminated and integrated. A mixed powder of 1: 0.05 weight ratio of Sumitomo Seika's Flow Beads EA209 as a coconut shell activated carbon having an average particle diameter of 550 μm and a thermoplastic powder resin is applied to the nonwoven fabric side comprising the heat-sealing long fibers of the laminated sheet obtained. sprayed so as to basis weight 630 g / m 2, further superimposing the basis weight 77 g / m 2 of a thermal bond nonwoven fabric from above was subjected to sheeting by heat treatment of 140 ° C.. This filter medium was processed into a pleated shape having a peak height of 28 mm and a pitch of 6 mm using a pleating machine, thereby producing a filter having an outer diameter of 200 mm × 200 mm.
Various measurement results of the obtained filter medium and filter are shown in Table 1.
本発明は圧力損失や粉塵保持量に優れた脱臭フィルター用濾材であり、長時間使用可能であり、産業界への寄与大である。 The present invention is a filter medium for a deodorizing filter excellent in pressure loss and dust holding capacity, can be used for a long time, and greatly contributes to the industry.
Claims (1)
前記熱融着系長繊維からなる不織布が、芯鞘構造の複合熱融着系長繊維からなる不織布である脱臭フィルター用濾材。 A filter medium composed of a laminated structure in which an adsorbent layer composed of an adsorbent and an adhesive is sandwiched between 10 to 450 g / m 2 between base material layers, wherein at least one layer of the base material layer has a basis weight of 5 to 40 g / m 2 It is a laminated sheet in which a nonwoven fabric composed of adhesive long fibers and a melt blown nonwoven fabric are laminated, and is laminated so that a nonwoven fabric composed of heat-bonding long fibers of the laminated sheet is adjacent to the heat-bonding long fibers. The low melting point component of the nonwoven fabric and the adsorption layer are thermally fused,
A filter medium for a deodorizing filter, wherein the nonwoven fabric composed of the heat-sealing long fibers is a nonwoven fabric composed of composite heat-sealing long fibers having a core-sheath structure .
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