200303185 ：·：·*·；\ί·ν··*--.：Λ·^：·χ： Λ·-·：：：*；. ·ν·ν -ν·····：*ν Λ：--.·· ....................................... 玖、發明說明. (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明) (一） 發明所屬之技術領域 本發明係關於吸塵機用集塵袋，更詳細地說，係關於低 壓力損失及捕集效率優異，而且於使用時不易有破袋發生 之吸塵機用集塵袋。 (二） 先前技術 以前，提案使用由內袋與外袋之2層構造所構成之濾紙 作爲吸塵機用集塵袋（實開平6-48556號公報）。然而，在 使用相關濾紙之情況下，爲了捕捉黴菌或花粉等之微細塵 埃則有增加濾紙之單位面積重量之必要，結果有增加壓力 損失之問題。 又，以捕集效率提升爲目的，提案於內袋使用不織布之 集塵袋（例如，特開平2 - 1 1 6 3 3 8號公報，實用新案註冊第 3019283號公報等）。然而，該等集塵袋係由於在使用中所 捕捉之水分而招致破袋，而有損害作爲集塵袋機能之缺點 〇 爲了解決這些問課題，有提案使用積層一體化由例如熔 融吹塑不織布所構成之過濾層與濕式不織布之補強層之纖 維片作爲外袋之吸塵機用集塵袋（特開平2 0 0 0 - 1 9 5號公報） 。然而，相關之吸塵機用集塵袋係由於熔融吹塑不織布與 濕式不織布之接著強度不足，於使用中於兩者間發生層間 剝離，該結果導致不能充分地活用熔融吹塑不織布之優異 -6 - 200303185 的粉塵捕捉能力。又，於吸塵粒徑極細塵埃之情況下，容 易引起堵塞，而絕對不能且滿足集塵性能。 (三）發明內容 發明所欲解決之問穎 本發明之目的係在於解決上述問題，提供以習知之吸塵 機用集塵袋不能充分地達成之低壓力損失以及高捕集效率 ，同時於使用時不易有破袋發生之吸塵機用集塵袋。 解決問穎之丰段 本發明者等，爲了解決上述之問題而重複專心一志之硏 究的結果，藉由使用於具有特定之單位面積重量之熔融吹 塑不織布之單面或雙面上，配置含有特定量聚乙烯醇系纖 維之濕式不織布之積層構造之纖維片作爲外袋，發現可解 決上述課題而達成本發明。 即。本發明係具有內袋與外袋之吸塵機用集塵袋，該外 袋係由1 Ομπι以下纖維直徑之纖維所成之熔融吹塑不織布與 在其單面或雙面上積層一體化的含有40%以上聚乙烯醇系 纖維之濕式不織布所成的單位面積重量35〜80g/m2之纖維 片所構成。 發明的實施熊樣 以下，具體說明本發明。 本發明之吸塵機用集塵袋係由內袋與外袋之2層構造所 構成，重要的是於外袋使用積層熔融吹塑不織布與含聚乙 烯醇系纖維之濕式不織布而成之纖維片。 用於構成本發明吸塵機用集塵袋之外袋之纖維片單層之 -7 - 200303185 熔融吹塑不織布之聚合物原料，如果是例如聚丙烯、聚乙 儲等之聚烯烴、聚對苯二甲酸乙二酯或聚對苯二甲酸丁二 酯等之聚酯、耐綸6、耐綸6 6等之聚醯胺等熱可塑性聚合 物，並無特別之限制，但從廉價地提供商品予消費者之觀 點，則以由聚烯烴、特別是由聚丙烯所構成之熔融吹塑不 織布爲佳。 又，如果在不損及本發明效果之範圍內，亦無妨一方面 添加抗菌劑、防霉劑等藥劑於該熱可塑性纖維中，一方面 進行於形成不織布後之後加工處理。 構成該熔融吹塑不織布之單纖維直徑，由捕集效率提昇 之觀點來看爲ΙΟμπι以下，較佳5μηι。然而由於纖維直徑過 小亦有所謂產生壓力損失增大之問題的情況，而以1 μπι以 上爲佳。又，該熔融吹塑不織布之單位面積重量係以 3〜30g/m2爲佳，而以5〜20g/m2爲更佳。單位面積重量超過 3 Og/m2則壓力損失變大而降低吸塵機之吸引力，另外，單 位面積重量低於3 g / m2則有捕集效率降低之情況。在發揮 較良好之捕集效率方面，係以5〜1 Og/m2爲特佳。相關之熔 融吹塑不織布係於熔點溫度以上加熱既定之熱可塑性聚合 物，藉由以噴嘴加壓幾出而形成絲條，進一步由聚物噴嘴 孔之週邊噴出加熱空氣來細化絲條同時捕集於金屬網上， 可藉由一般之熔融吹塑技術製造。 積層於該熔融吹塑不織布之單面或雙面上之濕式不織布 係重要爲包含40%以上聚乙烯醇系纖維。該聚乙烯系纖維 由於藉由使用適量而賦予濕式不織布足夠之強度，達成用 一 8 - 200303185 於補強熔融吹塑不織布之機械強度之比例。又，由於賦予 熔融吹塑不織布與濕式不織布之積層時足夠之接著強度， 亦可於用作集塵袋之情況下防止所謂層間剝離之缺點。特 別是在本發明中，係以包含該濕式不織布爲7〜20%之聚乙 烯醇系黏結纖維及30〜80%之聚乙烯醇系主體纖維爲佳。 聚乙烯醇系黏結纖維量過少則濕式不織布之強度及與熔 融吹塑不織布之接著力不足，過多則捕集效率降低，而且 有產生不利於成本等缺點之情況。由捕集效率以及與熔融 吹塑不織布之接著強度兩方面觀點來看，所配合之聚乙烯 醇系黏結纖維係以7〜20%爲佳，而以10〜15%爲較佳。 又，用於本發明之聚乙烯醇系主體纖維係以30〜80%爲佳 ’而以於50〜7 5%之範圍來混合爲較佳。該聚乙烯醇系主體 纖維之混合比例低於30%則難以得到足夠之強度，相反地 超過80%則有難以保持黏結纖維之混合比例於所欲之値的 情況。本發明中使用聚乙烯醇系主體纖維之優點係在於不 增加通氣阻力下提高集塵袋之強度。即，藉由倂用聚乙烯 醇系黏結纖維與聚乙烯醇系主體纖維，由於可於所得之濕 式不織布中形成適度之空隙，通氣阻力低，而且可製作強 度優異之集塵袋’再者於吸塵粒徑非常細之塵埃時發揮較 優異之效果。 還有’本發明中之聚乙烯醇系黏結纖維係溶解於8〇。〇以 下之水中者’皂化度係以9 9 · 9莫耳％以上者爲佳。又，該 聚乙燃醇系主體纖維係以實施縮醛化處理爲佳。還有，縮 醒化度係以15〜40莫耳％爲佳，而以25〜35莫耳％爲較佳 一 9- 200303185 。任何纖維所構成之聚乙烯醇系聚合度係以丨0 〇 0〜2 5 〇 〇爲 佳。 用於本發明之聚乙烯醇系纖維之製法係可採用公認之方 法’可採用濕式抽絲法、乾濕式抽絲法、乾式抽絲法之任 合一種。 用於本發明之聚乙烯醇系纖維係爲了使用作爲濕式不織 布’其織度則以0.3〜lOdtex爲佳，而以0.5〜5dtex爲較佳 。又’切斷長度係以1〜20mm爲佳，以2〜10mm爲較佳。該 聚乙烯醇系纖維之織度及切斷長度在上述範圍外，則於抄 製時有纖維分散不良之情況。 於本發明中，即使在使用聚烯烴系聚合物、特別是聚丙 烯於熔融吹塑不織布之情況下，由於在濕式不織布中之聚 乙烯醇系纖維之含量在上述之範圍，由熔融吹塑不織布與 濕式不織布所構成之纖維片於使用中亦不會剝離，不僅得 到捕集效率高之集塵袋，而且可效率佳地捕集粒徑爲1 μπι 以下之極細粒子，並且極不易引起堵塞。 還有，於本發明中，可使用破裂強度，作爲表示熔融吹 塑不織布與濕式不織布之剝離產生之難易度。該破裂強度 係以利用Mtihlen法低壓測定器之測定，以具有196kPa以 上者爲佳，而以294kPa以上爲較佳。又，於濕潤狀態下係 以69kPa以上爲佳，而以具有88kPa以上之破裂強度爲較 佳。即本發明之吸塵機用集塵袋，亦具有所謂具有對於無 論在乾燥狀態、濕潤狀態之使用中之優異之耐破裂性的優 點。 -10 - 200303185 又，於該濕式不織布中亦可配合其他纖維，所配合之其 他纖維方面，舉出有合成纖維或紙漿，爲了保持質地之均 勻性係以使用紙漿爲佳。爲了賦予纖維片鬆散性或通氣性 係較希望與合成纖維之倂用，而以適宜混合兩者來配合爲 較佳。然而，紙漿之使用量變得多量則有通氣阻力變大之 情況，又，增加合成纖維之混合比例則有與聚乙烯醇系黏 結纖維之接著性降低而不易得到必須之強度之情況。用於 本發明之紙漿係無特別之限制，可使用針葉樹未漂白牛皮 紙漿（NUKP)、針葉樹漂白牛皮紙漿（NBKP)、闊葉樹漂白牛 皮紙漿（LBKP)、針葉樹漂白亞硫酸鹽紙漿（NBSP)等之木材 紙漿。 該濕式不織布之單位面積重量係以30〜65g/m2爲佳，而 以40〜60g/m2爲較佳。單位面積重量低於30g/m2則得不到 足夠之補強效果與層間接著效果，相反地超過65g/m2則變 得過厚而有最終商品之處理性不方便之情況。還有，在積 層該濕式不織布於上述熔融吹塑不織布雙面之情況下，亦 可調整所使用之濕式不織布之總單位面積重量成爲上述之 範圍，如此之濕式不織布係可利用通常之抄紙法來製造。 於本發明中，使用積層熔融吹塑與濕式不織布而成之纖 維片作爲外袋，由確保優異之捕集效率之觀點來看，該纖 維片之單位面積重量爲35〜80g/m2，而以40〜70g/m2爲佳。 該纖維片之積層方法並無特別之限制，例如導入熔融吹塑 不織布於濕式不織布之抄紙步驟中所使用之乾燥用氈乾燥 器之氈面，來同時進行乾燥與積層等之方法，係可說是接 - 11 - 200303185 著強度亦高、工程上亦經濟之較佳手段。無論如何，重要 的是藉由積層不會造成捕集效率之降低或壓力損失之增大 地來進行強固之接著。還有，於本發明中使用已積層濕式 不織布於熔融吹塑不織布之纖維片之情況下，係以配置濕 式不織布成爲集塵袋之最外層者爲佳。 接下來說明構成本發明之吸塵機用集塵袋之內袋。 用於本發明之內袋方面，雖然可使用通常所用之濾紙、 乾式不織布、濕式不織布等，但由捕集效率與壓力損失之 平衡優異、同時於濕潤時之使用中亦不易破袋之觀點，以 使用不織布爲佳。本發明中之內袋係完成主要捕集3 0 μηι以 上粒徑之比較粒徑大之麈埃之比例，1 μπι以下粒徑之極細 塵埃通過內袋，並捕集於外袋。 特別是於本發明中，係以使用單位面積重量爲10〜50g/m2 、於縱向及橫向方向之濕潤強度爲1 5N / 5 cm以上而且濕潤 伸長度爲20%以上，再者通氣度爲50cc/cm、sec以上之不 織布爲較佳。由於使用相關之不織布，內袋可效率較佳地 捕集粒徑大之麈埃，而於外袋僅可捕集粒徑細之塵埃，可 得到不易產生堵塞之集塵袋。 構成用於內袋之不織布之纖維，雖可使用由耐綸、聚酯 、聚丙烯等之熱可塑性聚合物所構成之纖維，但由於熱封 性優異之理由，特別以聚丙烯爲佳。用於本發明之不織布 係特別以玻纖黏合不織布爲適，使用梳棉機所製造之熱黏 合型之乾式不織布係由於通氣度大而適合被使用。又，亦 可使用積層2層以上玻纖黏合不織布與熔融吹塑不織布之 - 1 2 - 200303185 原料。 用於內袋之不織布之單位面積重量係以5〜50g/m2爲佳， 而以10〜30 g/m2爲特佳。單位面積重量低於5g/m2則捕集效 率差’在提早因塵埃導致之外袋堵塞而損傷集塵袋壽命之 同時，濕潤強度不足而有由於所捕捉之水分導致破袋之情 況。另外，單位面積重量超過50g/m2則壓力損失變得過高 而有吸塵機之吸引力降低之情況。 又，該不織布係因於縱向及橫向方向之濕潤強度爲 15N/5 cm以上、斷裂伸長度爲20%以上之情況下，可防止 由於在同時吸進塵埃與水時等所引起之內袋潤濕導致破袋 之方面而佳。還有，於本發明中所謂之縱向方向係表示不 織布之MD方向，橫向方向係CD方向。 又，內袋用不織布之通氣度係以50cc/cm、sec以上爲佳 ，而以200cc/cm2*sec以上爲較佳。在低於50cc/cm2*sec 之情況下，係引起內袋提早堵塞，而有伴隨著吸塵機之使 用時間之壓力損失增大變大之情況。 本發明之吸塵機用集塵袋係可由使用例如上述之外袋與 內袋作爲袋本體，並設置安裝於該袋本體之板來製作。於 袋本體與所安裝之板上，設置用於導入塵埃之導入□，並 接著成爲該袋本體與所安裝之板之導入口一致。對於構成 所安裝之板之原料方面，並無特別之限制，可使用厚紙或 合成樹脂。又，對於本發明之吸塵機用集塵袋之形狀亦無 特別之限制，可對應所使用之吸塵機來適宜地設定。 所得之吸塵機用集塵袋係可安裝於吸塵機來使用。 - 1 3 _ 200303185 (四）實施方式 實例 以下’雖然藉由實例來更具體地說明本發明，但本發明 係不受該等實例所限制者。還有，實例中之各種物性値係 由以下之方法來測定者。 1 .壓力損失、捕集效率 a )粒徑大之塵埃之捕集效率 使用示於：i IS C9 1 08 - 1 992之吸引操作率測定裝置來進行 測定。使用市售之吸塵機（松下電器產業公司製：MC-S62P) 作爲吸塵機，適用高速風速來進行吸引來測定。以投入3〇g 小麥粉（65μπι平均粒徑）於上述測定裝置後之集塵袋之入上 風處與下風處之壓力差作爲壓力損失。 又捕集效率（％)係投入30g小麥粉後，如以下來求得。 捕集效率（％ )=[捕集前後集塵袋之質量增加（g)/3〇U)] X 100 b )粒徑細之塵埃之捕集性能 使用柴田科學公司製遮罩性能試驗裝置AP- 9000型，以 接下來之條件，讀取顯示於試驗裝置之値而求得堆積於以 內袋爲上游側之吸氣阻力成爲500Pa時點之集塵袋中之 NaCl量（mg)與此時之捕集效率。200303185: ·: · * ·; \ ί · ν ·· *-.: Λ · ^: · χ: Λ ·-· ::: * ;. · ν · ν -ν ··· :: * ν Λ: --....................................... 玖, invention description (Explanation of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments and the drawings are briefly explained) (1) The technical field to which the invention belongs The present invention relates to a dust bag for a vacuum cleaner, in more detail It is a dust collector for vacuum cleaners with low pressure loss and excellent collection efficiency, and it is not easy to have broken bags during use. (2) Prior art Previously, it was proposed to use a filter paper composed of a two-layer structure of an inner bag and an outer bag as a dust collecting bag for a vacuum cleaner (Shikai Hei 6-48556). However, in the case of using the relevant filter paper, it is necessary to increase the weight per unit area of the filter paper in order to capture fine dust such as mold or pollen, and as a result, there is a problem of increasing pressure loss. In order to improve the collection efficiency, it is proposed to use a non-woven dust bag for the inner bag (for example, Japanese Patent Application Laid-Open No. 2-1 1 6 3 38, Utility Model Registration No. 3019283, etc.). However, these dust collection bags are broken due to the moisture captured during use, which has a disadvantage of impairing the function of the dust collection bag. To solve these problems, it has been proposed to use laminates to integrate non-woven fabrics such as melt blow molding. The fibrous sheet composed of the filter layer and the reinforcing layer of the wet non-woven fabric is used as a dust collecting bag for a vacuum cleaner of an outer bag (Japanese Patent Application Laid-Open No. 2000-195). However, the related dust collecting bag for vacuum cleaners has insufficient bonding strength between the melt-blown nonwoven fabric and the wet-type nonwoven fabric, and interlayer peeling occurs between the two during use. As a result, the superiority of the melt-blown nonwoven fabric cannot be fully utilized. 6-200303185 for dust capture capability. In addition, in the case of extremely fine dust particles, clogging is easily caused, and the dust collection performance cannot be satisfied. (3) Summary of the Invention The purpose of the present invention is to solve the above-mentioned problems, and provide a low pressure loss and a high collection efficiency which cannot be fully achieved by the conventional dust collecting bag for a vacuum cleaner. Dust bags for vacuum cleaners that are less prone to breakage. To solve the problem of Ying Yingfeng, the present inventors, etc., repeated the research results in order to solve the above problems, and used it on one or both sides of the melt-blown non-woven fabric having a specific unit weight. A fiber sheet of a laminated structure of a wet type nonwoven fabric containing a specific amount of a polyvinyl alcohol-based fiber was used as an outer bag, and it was found that the above-mentioned problem can be solved and the present invention has been achieved. which is. The present invention relates to a dust collecting bag for a vacuum cleaner having an inner bag and an outer bag. The outer bag is a melt-blown non-woven fabric made of fibers with a fiber diameter of 10 μm or less and is integrated with one side or both sides. It is composed of a fiber sheet with a weight per unit area of 35 to 80 g / m2 made of a wet non-woven fabric of more than 40% polyvinyl alcohol-based fibers. DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below. The dust collecting bag for a vacuum cleaner of the present invention is composed of a two-layer structure of an inner bag and an outer bag. It is important to use a layer of melt-blown nonwoven fabric and a wet-laid nonwoven fabric containing polyvinyl alcohol-based fibers in the outer bag. sheet. -7-200303185 Melt-blown non-woven polymer raw materials used to form single layers of fiber sheets outside the dust bag of the vacuum cleaner of the present invention, if it is a polyolefin such as polypropylene, polyethylene storage, etc. There are no particular restrictions on thermoplastic polymers such as polyesters such as ethylene diformate or polybutylene terephthalate, polyamides such as nylon 6, nylon 6, 6 and so on. From the viewpoint of consumers, a melt-blown nonwoven fabric composed of polyolefin, especially polypropylene is preferred. In addition, if the effect of the present invention is not impaired, it is also possible to add an agent such as an antibacterial agent or a mildew-proof agent to the thermoplastic fiber, and to process it after forming a nonwoven fabric. The diameter of the single fiber constituting the melt-blown nonwoven fabric is 10 μm or less, and preferably 5 μm, from the viewpoint of improving the collection efficiency. However, there may be a problem that the pressure loss is increased because the fiber diameter is too small, and it is preferably 1 μm or more. The weight per unit area of the melt-blown nonwoven fabric is preferably 3 to 30 g / m2, and more preferably 5 to 20 g / m2. If the weight per unit area exceeds 3 Og / m2, the pressure loss increases and the attractiveness of the vacuum cleaner is reduced. In addition, if the unit weight is less than 3 g / m2, the collection efficiency may decrease. In terms of exerting a relatively good trapping efficiency, 5 to 1 Og / m2 is particularly preferred. The related melt-blown non-woven fabric is a predetermined thermoplastic polymer heated above the melting point temperature. The filament is formed by pressurizing the nozzle a few times, and the heated air is sprayed from the periphery of the polymer nozzle hole to refine the filament while capturing. Collected on a wire mesh, it can be manufactured by general melt blow molding technology. The wet-laid nonwoven fabric laminated on one side or both sides of the melt-blown nonwoven fabric is important to contain 40% or more of a polyvinyl alcohol-based fiber. Since the polyethylene fiber is given sufficient strength to the wet-type nonwoven fabric by using an appropriate amount, the ratio of mechanical strength for reinforcing the melt-blown nonwoven fabric by using 8-200303185 is achieved. In addition, since sufficient adhesion strength is provided when a layer of the melt-blown nonwoven fabric and the wet nonwoven fabric is provided, it is also possible to prevent the so-called interlayer peeling when used as a dust bag. Especially in the present invention, it is preferable that the wet-laid nonwoven fabric contains 7 to 20% of polyvinyl alcohol-based bonded fibers and 30 to 80% of polyvinyl alcohol-based main fibers. When the amount of the polyvinyl alcohol-based bonding fiber is too small, the strength of the wet nonwoven fabric and the bonding force with the melt-blown nonwoven fabric are insufficient, and when the amount is too large, the collection efficiency is reduced, and disadvantages such as cost disadvantage may occur. From the viewpoints of the collection efficiency and the bonding strength with the melt-blown nonwoven fabric, the blended polyvinyl alcohol-based bonding fiber is preferably 7 to 20%, and more preferably 10 to 15%. The polyvinyl alcohol-based main fiber used in the present invention is preferably 30 to 80%, and more preferably mixed in a range of 50 to 75%. When the blend ratio of the polyvinyl alcohol-based main fiber is less than 30%, it is difficult to obtain sufficient strength. On the other hand, when it exceeds 80%, it may be difficult to maintain the blend ratio of the bonded fibers at a desired level. The advantage of using a polyvinyl alcohol-based main fiber in the present invention is to increase the strength of the dust bag without increasing the ventilation resistance. That is, by using polyvinyl alcohol-based bonding fibers and polyvinyl alcohol-based main fibers, moderate voids can be formed in the obtained wet nonwoven fabric, the ventilation resistance is low, and a dust bag with excellent strength can be produced. It exhibits excellent effects when dust with a very fine particle size is collected. Also, the polyvinyl alcohol-based binder fiber in the present invention is dissolved in 80%. 〇 Saponification degree of those below the water is preferably at least 9 · 9 mol%. In addition, it is preferable that the polyethylene-based main fiber is acetalized. Also, the degree of awakeness is preferably 15 to 40 mol%, and more preferably 25 to 35 mol%. 9-200303185. The degree of polymerization of the polyvinyl alcohol based on any fiber is preferably from 0 to 0 to 2500. The production method of the polyvinyl alcohol-based fiber used in the present invention may adopt a recognized method ', and any one of a wet spinning method, a dry-wet spinning method, and a dry spinning method may be used. In order to use the polyvinyl alcohol-based fiber used in the present invention as a wet non-woven fabric, the weave is preferably 0.3 to 10 dtex, and more preferably 0.5 to 5 dtex. The cutting length is preferably 1 to 20 mm, and more preferably 2 to 10 mm. If the degree of weaving and cut length of the polyvinyl alcohol-based fibers are outside the above ranges, fiber dispersion may be poor during copying. In the present invention, even when a polyolefin-based polymer, particularly polypropylene, is used for melt-blown nonwoven fabric, since the content of the polyvinyl alcohol-based fiber in the wet nonwoven fabric is within the above-mentioned range, melt-blow molding is performed. The fiber sheet composed of non-woven fabric and wet-type non-woven fabric will not be peeled off during use. Not only the dust collection bag with high collection efficiency can be obtained, but also extremely fine particles with a particle size of 1 μm or less can be efficiently collected, and it is extremely unlikely Clogged. Further, in the present invention, the burst strength can be used as an indication of the degree of easiness of peeling of the melt blown nonwoven fabric and the wet nonwoven fabric. The rupture strength is measured by a low-pressure tester using the Mtihlen method, preferably 196 kPa or more, and more preferably 294 kPa or more. In a wet state, it is preferably 69 kPa or more, and it is more preferable to have a burst strength of 88 kPa or more. That is, the dust collecting bag for a vacuum cleaner of the present invention also has an advantage of having so-called excellent crack resistance for use in a dry state and a wet state. -10-200303185 In addition, other fibers can be blended into the wet non-woven fabric. For other blended fibers, synthetic fibers or pulp are mentioned. In order to maintain the uniformity of the texture, it is better to use pulp. In order to impart looseness or air permeability to the fiber sheet, it is more desirable to use it with synthetic fibers, and it is better to mix the two appropriately. However, when the amount of pulp used is large, the ventilation resistance may increase, and when the mixing ratio of synthetic fibers is increased, the adhesiveness with polyvinyl alcohol-based bonded fibers may be reduced, and it may not be easy to obtain the necessary strength. The pulp used in the present invention is not particularly limited. Coniferous unbleached kraft pulp (NUKP), coniferous bleached kraft pulp (NBKP), broadleaf bleached kraft pulp (LBKP), coniferous bleached sulfite pulp (NBSP), etc. may be used. Wood pulp. The basis weight of the wet nonwoven fabric is preferably 30 to 65 g / m2, and more preferably 40 to 60 g / m2. If the weight per unit area is less than 30g / m2, sufficient reinforcement effect and layer indirect effect cannot be obtained. On the contrary, if it exceeds 65g / m2, it becomes too thick and there is a reason that the final product is inconvenient. In addition, in a case where the wet nonwoven fabric is laminated on both sides of the above-mentioned melt-blown nonwoven fabric, the total unit weight of the wet nonwoven fabric used can also be adjusted to the above-mentioned range. Such a wet nonwoven fabric can use the usual Paper-making method. In the present invention, a fiber sheet made of laminated melt-blow molding and wet non-woven fabric is used as an outer bag. From the viewpoint of ensuring excellent collection efficiency, the basis weight of the fiber sheet is 35 to 80 g / m2, and 40 ~ 70g / m2 is preferred. The method for laminating the fiber sheet is not particularly limited. For example, a method of introducing a felt surface of a drying felt dryer used in a papermaking step of a melt-blown nonwoven fabric into a wet nonwoven fabric, and simultaneously drying and laminating, etc., is possible. Said to be-11-200303185 is a better means of strength and economical engineering. In any case, it is important to strengthen the bonding by laminating it without causing a decrease in the collection efficiency or an increase in pressure loss. In the case where a laminated wet-type nonwoven fabric is used in the melt-blown nonwoven fiber sheet in the present invention, it is preferable to arrange the wet-type nonwoven fabric as the outermost layer of the dust bag. Next, an inner bag constituting a dust collecting bag for a vacuum cleaner of the present invention will be described. For the inner bag of the present invention, although commonly used filter papers, dry nonwovens, wet nonwovens, etc. can be used, it has an excellent balance between capture efficiency and pressure loss, and it is not easy to break the bag when it is wet. It is better to use non-woven fabrics. In the present invention, the inner bag is mainly used to capture the ratio of larger angstroms with a larger particle size of 30 μηι or larger, and extremely fine dust with a particle diameter of 1 μm or less passes through the inner bag and is collected in the outer bag. Particularly in the present invention, the weight per unit area is 10 to 50 g / m2, the wet strength in the longitudinal and transverse directions is 15 N / 5 cm or more, and the wet elongation is 20% or more, and the air permeability is 50 cc. Non-woven fabrics of at least 1 cm / sec are preferred. Due to the use of related non-woven fabrics, the inner bag can efficiently capture large sized angstroms, while the outer bag can only capture dust with a small particle size, and a dust collecting bag that is less prone to blockage can be obtained. Although the fiber constituting the non-woven fabric used for the inner bag can be made of a thermoplastic polymer such as nylon, polyester, polypropylene, etc., polypropylene is particularly preferred because of its excellent heat-sealability. The non-woven fabric used in the present invention is particularly suitable for glass-fiber bonded non-woven fabrics. The heat-bonded dry-type non-woven fabrics manufactured by using a card are suitable for use because of their high air permeability. In addition, it is also possible to use two or more layers of glass fiber bonded nonwovens and melt blown nonwovens-1 2-200303185 raw materials. The basis weight of the non-woven fabric used for the inner bag is preferably 5 to 50 g / m2, and particularly preferably 10 to 30 g / m2. If the weight per unit area is less than 5g / m2, the capture efficiency is poor. 'While the dust bag may be damaged due to the clogging of the outer bag due to dust, the wet strength may be insufficient and the bag may be broken due to the captured moisture. In addition, if the weight per unit area exceeds 50 g / m2, the pressure loss becomes too high and the attractive force of the vacuum cleaner may decrease. In addition, when the wet strength of the nonwoven fabric in the longitudinal and transverse directions is 15N / 5 cm or more and the elongation at break is 20% or more, the inner bag can be prevented from wetting due to the simultaneous inhalation of dust and water. Moisture is preferred in terms of broken bags. The longitudinal direction in the present invention means the MD direction of the nonwoven fabric, and the transverse direction means the CD direction. The air permeability of the non-woven fabric for the inner bag is preferably 50 cc / cm, sec or more, and more preferably 200 cc / cm 2 * sec or more. If it is lower than 50cc / cm2 * sec, the inner bag may be prematurely blocked, and the pressure loss may increase with the use time of the vacuum cleaner. The dust collecting bag for a vacuum cleaner of the present invention can be produced by using, for example, the above-mentioned outer bag and inner bag as a bag body and installing a plate mounted on the bag body. An introduction lead for introducing dust is provided on the bag body and the installed board, and then the introduction port of the bag body and the installed board is consistent. There are no particular restrictions on the raw materials constituting the board to be mounted, and thick paper or synthetic resin can be used. The shape of the dust collecting bag for the vacuum cleaner of the present invention is not particularly limited, and can be appropriately set in accordance with the vacuum cleaner to be used. The obtained dust bag for a vacuum cleaner can be used by being attached to a vacuum cleaner. -1 3 _ 200303185 (IV) Embodiments Examples Although the following describes the present invention more specifically with examples, the present invention is not limited by these examples. In addition, various physical properties in the examples are measured by the following methods. 1. Pressure loss and trapping efficiency a) The trapping efficiency of dust with large particle size is measured using a suction operation rate measuring device shown in i IS C9 1 08-1 992. A commercially available vacuum cleaner (manufactured by Matsushita Electric Industrial Co., Ltd .: MC-S62P) was used as the vacuum cleaner, and measurement was performed by applying high-speed wind speed to suction. The pressure difference was taken as the pressure difference between the inlet and outlet of the dust bag after 30g of wheat flour (average particle size of 65μm) was put into the measuring device. The trapping efficiency (%) was determined by adding 30 g of wheat flour as follows. Capture efficiency (%) = [mass increase of dust bag before and after collection (g) / 3〇U)] X 100 b) The collection performance of fine-grained dust is using a mask performance test device AP manufactured by Shibata Science Co., Ltd. -Model 9000: Under the following conditions, read the display on the test device to determine the amount of NaCl (mg) in the dust bag that was accumulated at the point when the suction resistance on the upstream side of the inner bag became 500 Pa, and Capture efficiency.
NaCl粒徑：0 . ΙμΐΏ平均粒徑 流量：3 0 L / m i η 2 .強度 依照；Π S LI 906來測定。還有，測定係針對濕潤時來測 200303185 疋。 3 .伸長度 依照；ί I S LI 9 06來測定。還有，測定係針對濕潤時來測 定。 4 .通氣度 依照J I S L 1 9 0 6 A法（F r a j 〇 u r形法）來測定。 5 ·破裂強度 依照JIS L1 906 A法（Miihlen形法）來測定。還有，測定 係針對乾燥時（標準狀態）與濕潤時來測定。 6 ·纖維直徑 使用掃描型電子顯微鏡（SEM)來攝影擴大不織布之表面成 1 000倍之照片，求得100根構成不織布纖維之平均値作爲 纖維直徑。 賨例1 於外袋用以6 0 %聚乙烯醇系主體纖維（庫拉類公司製 VPB103、1 · ldt ex、3mm切斷長）、12%聚乙烯醇系黏結纖維 (庫拉類公司製VPB101、1 · 7dt ex、4mm切斷長）、8%聚丙 烯纖維（Chisso公司製、2.2dtex、3 mm切斷長）及20%紙 漿NBKP爲原料，以通常之紙鈔法製造20g/m2單位面積重 量之濕式不織布。 另外，使用熔融指數（依據J I S K 67 58 ; 23 0 °C、2 . 1 6kg 荷重）爲600g/ 10分鐘之聚丙烯樹脂，利用通常之方法得到 7g/m2單位面積重量之熔融吹塑不織布。構成該不織布之平 均纖維直徑係由利用電子顯微鏡之照片來判定爲2 . 8μπ)。 -15 - 200303185 還有，於濕式不織布之抄紙步驟中之以氈乾燥器之乾燥 時，於氈面導入同時積層熔融吹塑不織布成爲纖維片。再 者再度導入所得之纖維片於氈乾燥器，合倂已捲取於其他 滾筒之濕式不織布於熔融吹塑不織布面並積層一體化，得 到以熔融吹塑不織布爲中間層並具有於兩側配置濕式不織 布（總計單位面積重量40g/m2)而成之47g/m2單位面積重量 之3層構造之外袋用纖維片。所得之纖維片之積層強度係 極爲強固，顯示3 5 3 kPa破裂強度、濕潤時之破裂強度爲 1 18kPa，完全不見層剝離。 又，使用具有17g/m2單位面積重量之聚乙烯玻纖黏合不 織布來製造內袋。該玻纖黏合不織布係縱向及橫向濕潤強 度個別爲42N/5cm、22N/5cm，濕潤伸長度爲縱向方向50% 、橫向方向50% ，厚度爲0. 19mm。 重疊所得之內袋與外袋，裁成4 7 cm布巾。其次，於成爲 外袋之外側部分設置5 cm直徑之開口部（塵埃導入口），於 流動方向從兩側面進入摺縫（邊折），使流動方向之製品布 巾爲12cm。此時，藉由熱封來進行背縫。 接著將流動方向之長度裁成31cm，改變生產之流動成爲 直角方向，於兩側面之開口部摺成2cm之摺疊並熱封之。 再者於上述麈埃導入口，安裝具有導入裝置、缺口、胺甲 酸酯製包裝之口紙（1 lcmx 12 · 5cm、2mm厚度），得到吸塵機 用集塵袋。結果示於表1及表2。 實例2 製造以於外袋用以70%聚乙烯醇系主體纖維（庫拉類公司 200303185 製VPBl 03、1 · 1 d t ex、3_切斷長）、1 5%聚乙烯醇系黏結 纖維（庫拉類公司製VPB101、1 . 7dtex、4mm切斷長）、及15 %由紙漿NBKP所構成之22g/m2單位面積重量之濕式不織 布。 又’與實例1相同地準備5 g / m2單位面積重量之熔融吹 塑不織布。以實例1相同之積層方法，得到於熔融吹塑不 織布之兩側配置上述濕式不織布而成之49g/m2單位面積重 量之纖維片。所得之纖維片之破裂強度爲3 24kP a、濕潤 時之破裂強度爲103kPa。 另外，使用於5 . 5μηι纖維直徑、4g/m2單位面積重量之聚 丙烯熔融吹塑不織布之雙面，積層5g/cm2單位面積重量之 聚丙烯玻纖黏合不織布，並施行壓花加工（7%壓花面積率） 來複合化之總計單位面積重量14g/m2單位面積重量之積層 不織布作爲內袋用。該積層不織布之濕潤強度係縱向、橫 向個別爲3 5N/5 cm、18N/5 cm，濕潤伸長度係縱向、橫向方 向個別爲40%及52%。（表1、表2) 實例3 製造以65%聚乙烯醇系主體纖維（庫拉類公司製VPB103 、1 · ldtex、3mm切斷長）、10%聚乙烯醇系黏結纖維（庫拉 類公司製VPB101、1 · 7dt ex、4mm切斷長）、12%聚酯纖維 (2 · 8dt ex、3_切斷長）及1 3%由紙漿NBKP所構成之50g/m2 單位面積重量之濕式不織布於外袋用。 另外，與實例1相同地準備6g/m2單位面積重量之聚丙 烯熔融吹塑不織布，以與實例1相同之方法得到4 1 g /m2 -17- 200303185 單位面積重量之2層構造之纖維片。於內袋使用與實例相 同之聚丙烯玻纖黏合不織布而得到集塵袋。（表1、表2 ) 比較例1 於內袋用使用由70%紙漿NBKP、24%聚酯纖維（1.7dtex 、3mm切斷長）及6%聚乙烯醇系黏結纖維（庫拉類公司製 VPB101、1.7dtex、4m m切斷長）所構成之20g/m2單位面積 重量之濕式不織布，於外袋用由65%紙漿NBKP、28%聚丙 烯纖維（1 . 7dt ex、3mm切斷長）、7%聚乙烯醇系黏結纖維（ 庫拉類公司製 VPB101、1 . 7dt ex、4m m切斷長）所構成之 48g/m2單位面積重量之濕式不織布而得到集塵袋。（表i、 表2) 比較例2 與實例1相同地使用聚丙烯樹脂，利用通常之方法得到 10g/m2單位面積重量之熔融吹塑不織布。另外以55%紙漿 、3 9%聚烯烴系熱融著複合纖維（Chi s so公司製「EA纖維 」）及6%聚乙烯醇系纖維（庫拉類公司製VPB101、1 .7dtex 、4m m切斷長）作爲原料，以通常之抄紙法得到25g/m2單 位面積重量之濕式不織布。接著，配置該濕式不織布於所 得之熔融吹塑不織布之兩面，以120°C熱壓鑄而使三層一體 化。除了使用所得之積層纖維片作爲外袋、使用於比較例 1所使用之內袋之外，與實例1相同地得到吸塵機用集麈 袋。（表1、表2) -18- 200303185 表1 外袋 內袋 集塵袋 破裂強度(kPa) 溻潤強度(N/5cm) 濕潤伸長度(％ ) 通氣度（cc/cm2 · sec) 乾燥時 濕潤時 縱向 橫向 縱向 橫向 內袋 外袋 實例1 353 118 42___ 22 50 55 451 28 實例2 324 103 35 18 40 52 352 25 實例3 360 120 42 22 50 55 451 25 比較例1 180 40 20 5 10 16 120 15 比較例2 175 38 20 5 10 16 120 14 表2 集1 壟袋性能 小麥粉 NaCl 壓力損失 (mmH20) 捕集效率 (% ) 捕集效率(¾ ) 堆積捕集量(mg) 實例1 318 99.2 93.0 5.4 實例2 323 99.4 90.6 5.1 實例3 334 99.6 91.7 5.3 比較例1 525 99.3 71.0 2.7 比較例2 550 99.5 72.5 3.0NaCl particle size: 0.1 μΐΏ average particle size flow rate: 30 L / m i η 2. Intensity was measured in accordance with UIS LI 906. The measurement is based on 200303185 2003. 3. Elongation was measured in accordance with I S LI 9 06. In addition, the measurement is performed for a wet time. 4. Ventilation was measured in accordance with the J I S L 1 906 A method (F r a j 〇 r r method). 5 Breaking strength Measured in accordance with JIS L1 906 A method (Miihlen method). In addition, the measurement is performed in a dry (standard state) and a wet state. 6. Fiber diameter A scanning electron microscope (SEM) was used to take a photograph of the surface of the non-woven fabric enlarged 1,000 times, and the average diameter of 100 non-woven fibers was obtained as the fiber diameter. Example 1 In the outer bag, 60% of polyvinyl alcohol-based main fiber (VPB103, 1 · ldt ex, 3mm cut length manufactured by Kura Corporation), 12% of polyvinyl alcohol-based bonded fiber (made by Kura Corporation) VPB101, 1 · 7dt ex, 4mm cut length), 8% polypropylene fiber (manufactured by Chisso, 2.2dtex, 3 mm cut length) and 20% pulp NBKP are used as raw materials. 20g / m2 is produced by the usual paper currency method. Wet nonwoven fabrics per unit weight. In addition, a polypropylene resin having a melt index (based on J I S K 67 58; 23 0 ° C, 2.16 kg load) of 600 g / 10 minutes was used to obtain a melt blown nonwoven fabric having a basis weight of 7 g / m2 by a conventional method. The average fiber diameter of the nonwoven fabric was determined to be 2.8 µπ from a photograph using an electron microscope). -15-200303185 In addition, when drying with a felt dryer in the papermaking step of the wet type nonwoven fabric, a melt-blown nonwoven fabric is introduced into the felt surface to form a fiber sheet. Furthermore, the obtained fiber sheet was re-introduced into a felt dryer, and the wet non-woven fabric that had been wound up in other drums was melt-blown on the surface of the non-woven fabric and then laminated and integrated to obtain a melt-blown non-woven fabric as an intermediate layer and having both sides A fiber sheet for bags with a 3-layer structure of 47 g / m2 unit area weight made of wet non-woven fabric (40 g / m2 in total unit area weight). The laminated layer strength of the obtained fiber sheet was extremely strong, showing a burst strength of 3 5 3 kPa and a burst strength of 1 18 kPa when wet, and no layer peeling was observed at all. An inner bag was made of a polyethylene glass fiber bonded nonwoven fabric having a basis weight of 17 g / m2. 19mm。 The glass fiber bonded non-woven series of longitudinal and transverse wet strength of 42N / 5cm, 22N / 5cm, respectively, wet elongation of 50% in the longitudinal direction, 50% in the transverse direction, the thickness is 0. 19mm. The inner bag and the outer bag were overlapped and cut into a 47 cm cloth towel. Next, an opening (dust introduction port) with a diameter of 5 cm is set on the outer part of the outer bag, and the folds (edge folds) are entered from both sides in the flow direction, so that the product cloth in the flow direction is 12 cm. At this time, back seam is performed by heat sealing. Then cut the length of the flow direction to 31cm, change the flow of production to a right-angle direction, fold the openings on both sides into 2cm folds and heat seal it. Further, a mouthpiece (1 lcmx 12 · 5cm, 2mm thickness) having an introduction device, a notch, and a urethane packaging was attached to the above-mentioned angstrom inlet to obtain a dust bag for a vacuum cleaner. The results are shown in Tables 1 and 2. Example 2 Manufactured in an outer bag with 70% polyvinyl alcohol-based main fiber (VPBl 03, 1.1 dt ex, 3_ cut length made by Kura Corporation 200303185), 1 5% polyvinyl alcohol-based bonded fiber ( VPB101, 1.7 dtex, 4mm cut length) made by Kura Corporation, and 15% wet-laid nonwoven fabric with a unit weight of 22g / m2 composed of pulp NBKP. Also, as in Example 1, a 5 g / m2 basis weight melt-blown nonwoven fabric was prepared. Using the same lamination method as in Example 1, a fiber sheet having a weight per unit area of 49 g / m2 obtained by disposing the above-mentioned wet nonwoven fabric on both sides of the melt-blown nonwoven fabric was obtained. The breaking strength of the obtained fiber sheet was 3 24 kP a, and the breaking strength when wet was 103 kPa. In addition, polypropylene melt-blown non-woven fabric with a fiber diameter of 5.5 μm and a unit weight of 4 g / m2 was used on both sides, and a polypropylene glass fiber bonded nonwoven fabric with a unit weight of 5 g / cm 2 was laminated and embossed (7% Embossed area ratio) The laminated non-woven fabric with a total basis weight of 14g / m2 per unit area for compounding is used as an inner bag. The wet strength of this laminated non-woven fabric is 3 5N / 5 cm and 18N / 5 cm respectively in the longitudinal and transverse directions, and the wet elongation is 40% and 52% in the longitudinal and transverse directions respectively. (Table 1, Table 2) Example 3 Production of 65% polyvinyl alcohol-based main fiber (VPB103, 1 · ldtex, 3 mm cut length manufactured by Kura Corporation), 10% polyvinyl alcohol-based bonded fiber (Kura Corporation) VPB101, 1 · 7dt ex, 4mm cut length), 12% polyester fiber (2 · 8dt ex, 3_ cut length), and 1% of 50g / m2 unit area weight made of pulp NBKP wet type Not woven for outer bags. In addition, a polypropylene melt-blown nonwoven fabric having a basis weight of 6 g / m2 was prepared in the same manner as in Example 1, and a fiber sheet having a two-layer structure having a basis weight of 4 1 g / m2 -17- 200303185 was obtained in the same manner as in Example 1. In the inner bag, the same polypropylene glass fiber non-woven fabric as in the example was used to obtain a dust collecting bag. (Tables 1 and 2) Comparative Example 1 For inner bags, 70% pulp NBKP, 24% polyester fiber (1.7 dtex, 3 mm cut length), and 6% polyvinyl alcohol-based bonded fiber (made by Kura Corporation) were used. VPB101, 1.7dtex, 4mm m cut length) of 20g / m2 wet area non-woven fabric with unit weight of 65% pulp NBKP, 28% polypropylene fiber (1.7dt ex, 3mm cut length) ), A wet-laid nonwoven fabric of unit weight of 48 g / m2 composed of 7% polyvinyl alcohol-based bonded fibers (VPB101 manufactured by Kura Corporation, 1.7 dt ex, 4 mm cut length) to obtain a dust bag. (Table i, Table 2) Comparative Example 2 A polypropylene resin was used in the same manner as in Example 1, and a melt-blown nonwoven fabric having a basis weight of 10 g / m2 was obtained by a conventional method. In addition, 55% pulp, 39% polyolefin-based heat-fusion composite fibers ("EA fibers" manufactured by Chisso Corporation) and 6% polyvinyl alcohol-based fibers (VPB101, 1.7 dtex, 4 mm, manufactured by Kura Corporation) are used. Cut length) As a raw material, a wet nonwoven fabric having a basis weight of 25 g / m2 was obtained by a conventional papermaking method. Next, the wet-laid nonwoven fabric was placed on both sides of the obtained melt-blown nonwoven fabric, and the three layers were integrated by hot die-casting at 120 ° C. A dust collecting bag for a vacuum cleaner was obtained in the same manner as in Example 1 except that the obtained laminated fiber sheet was used as an outer bag and an inner bag used in Comparative Example 1. (Table 1 and Table 2) -18- 200303185 Table 1 Bursting strength (kPa) of the outer bag and inner dust bag Wet strength (N / 5cm) Wet elongation (%) Ventilation (cc / cm2 · sec) When dry Example 1 353 118 42___ 22 50 55 451 28 Example 2 324 103 35 18 40 52 352 25 Example 3 360 120 42 22 50 55 451 25 Comparative Example 1 180 40 20 5 10 16 120 15 Comparative Example 2 175 38 20 5 10 16 120 14 93.0 5.4 Example 2 323 99.4 90.6 5.1 Example 3 334 99.6 91.7 5.3 Comparative Example 1 525 99.3 71.0 2.7 Comparative Example 2 550 99.5 72.5 3.0
本發明之吸塵機用集塵袋係壓力損失與捕集效率之平衡 優異，而且亦可效率佳地吸塵粒徑細之塵埃。又，於9 cm 直徑、2cm深度之煙灰缸中加入3支香煙濾嘴與50cc水， -19- 200303185 以具備上述實例及比較例之集麈袋來進行吸引試驗。於針 封各例個別平均1 0片來進行試驗時，於使用本發明集麈袋 之情況下係無發生任何破袋。然而，於使用比較例集塵袋 之情況下係1 〇袋中有4袋發現內袋與外袋之破袋，於使用 比較例2之情況下係1 〇袋中有4袋發現內袋之破袋。 發明之效畢 本發明之吸塵機用集塵袋係除了由於接著強度充足而不 怕在使用中或成型加工中發生層剝離，由於壓力損失及捕 集效率之平衡優異，有作爲吸塵機用集塵袋之高性能者， 而且可廉價地提供給消費者。又，本發明之吸塵機用集塵 袋係亦可效率佳地捕集粒徑極細之塵埃，不易發生堵塞者The dust collecting bag for a vacuum cleaner of the present invention is excellent in the balance between pressure loss and collection efficiency, and can also efficiently collect dust with a fine particle diameter. In addition, 3 cigarette filters and 50cc of water were added to an ashtray with a diameter of 9 cm and a depth of 2 cm. The suction test was performed with a collection bag having the above examples and comparative examples. When an average of 10 pieces were individually tested in each case of pin-sealing, no breakage occurred in the case of using the collection bag of the present invention. However, in the case of using the dust collecting bag of the comparative example, 4 of the 10 bags were found to be broken and the outer bag was broken, and in the case of using the comparative example 2, 4 of 10 bags were found to be the inner bag. Broken bag. Effectiveness of the invention The dust collecting bag for the vacuum cleaner of the present invention is not only afraid of layer peeling during use or molding processing due to sufficient bonding strength, but also has excellent balance between pressure loss and collection efficiency. High-performance bags are also available to consumers at low cost. In addition, the dust collection bag system for a vacuum cleaner of the present invention can also efficiently collect dust with extremely fine particle diameters, and is less likely to cause clogging.
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