200417644 (1) ' 玖、發明說明 【發明所屬之技術領域】 本發明爲，有關雖濕仍強的乾式紙漿不織布。更詳細 的爲，有關於使用在濕狀地板用、廚房用、汽車用之類之 對物擦拭物，和淸掃調理器具、擦淨食材、吸收滴落物用 之類廚房紙巾，和臉、手、身體之類對人擦拭物之類合適 的不織布。更進一步的說，本發明爲，有關在乾狀使用的 場合，亦因爲在此等之用途多爲存在水分的場合，可期待 相同的效果，而且，生理用品、尿布類的衛生材料，和在 醫學的用途亦合適的不織布。 【先前技術】 由以往而知的乾式紙漿不織布爲，以紙漿纖維層作爲 基底，聚丙烯酸酯系和聚醋酸乙烯系類的化學黏著劑噴霧 、塗佈於表層、又浸含於全體而形成纖維間結合。 於如此地不織布，就增加黏著劑量而言，樹脂形成膜 時會變硬，招致水分吸收能力的低下，而在減少的場合不 只增大纖維的脫落，而且對強力，特別是不可避免濕潤時 的強力的低下。 而且，考慮授與粉末狀之黏著劑樹脂的方法，在此之 場合，難以形成皮膜，而紙漿纖維與黏著劑的接著點數變 少，脫落纖維容易變多。從而，持續確保不過硬的質地、 適度的吸水性、少纖維脫落，更進一步製作於濕潤強力優 良的乾式紙漿不織布是困難的。 -5- (2) (2)200417644 以乾式紙獎不織布，作爲使用於生理用品之吸收內側 材料和家庭或工業用之洗淨用途者，有被提案僅由表面之 結合纖維構成之層，單位面積重量爲1〜5g/m2、內層 部之結合纖維爲2〜10%重量百分率之乾式紙漿不織布（ 日本特表2000-504792號公報）。 有關此之不織布之強度，關於通常的強力作爲生理用 品之吸收內側材料地衛生用品之用途是充分的，但不言及 一切有關本發明之大重點「雖濕仍強」。進入於此之公開 專利之範圍的技術內容的不織布爲，內層部之結合纖維之 量少於2〜1 0 %重量百分率，難謂雖濕仍強，甚至於濕潤 時招致強力低下，不適於擦去，完全異於本發明之意圖。 而且，熱黏著形成黏著劑纖維的交點，有特定拉裂強 力的氣流噴吹不織布也被提案出來（日本特開 2000-3 45454號公報），而在與紙漿複合之場合完全不言 及於濕潤強力和吸水性，完全沒有記載啓發作爲本發明之 層狀構造之技術。 在以往的不織布中，有上述地問題。 【發明內容】 本發明者群鑑於上述地現狀，重覆專心檢討的結果， 適合化包含熱黏著性合成纖維之表裏層的單位面積重量， 而且依增加內層之熱黏著性合成纖維之量，發現可得纖維 不脫落、吸水性佳、且強，特別在濕潤強力充分的乾式紙 漿不織布，達到完成本發明。 -6- (3) (3)200417644 【實施方式】 本發明爲，包含熱黏著性合成纖維，熱黏著該合成纖 維彼此間，單位面積重量爲超過5g / m2在12g / m2以下 之兩面的表層部和；由熱黏著性合成纖維與紙漿纖維以 20 / 80〜60 / 40之重量百分率％之比例混合，由熱黏著 該合成纖維彼此間及/或合成纖維和紙漿纖維而成，作成 單位面積重量爲超過8〜24 Og/m2的內層部，作爲全體， 表裏面與內層部之間亦，依該合成纖維彼此間之熱黏著而 一體化，長度與寬度的強力之比率爲，乾燥時與濕潤時同 時’爲〇 · 8〜1 · 2，在乾燥時與濕潤時強力之比率爲〇 . 6〜 1·1，水分之吸收性爲8〜20g/ g，且總單位面積重量20 〜25 0 g/ m2爲特徵，有關一體化層狀構造之乾式紙漿不 織布（以下，單以「乾式不織布」稱之）。 以下說明本發明之實施形態。 本發明之不織布爲，以由熱黏著性合成纖維和紙漿纖 維構成之內層、與包含挾持此之熱黏著性合成纖維之表層 ’作爲3層構造，以熱黏著而一體化。 在本發明爲，形成表層之主成分、或以與紙漿混合之 熱黏著性合成纖維爲即使以熱會溶融相互結合地任一物 就可以’依此纖維間結合之網目狀構造固定紙漿，使用與 紙漿纖維親和性大的聚合物之纖維特佳。例如，以聚烯烴 纖維類、不飽和羧酸類接枝化列舉聚烯烴纖維類、聚酯類 、聚乙烯醇纖維之類。 (4) ' (4) '200417644 此之內，以聚烯烴纖維系熱黏著性合成纖維，芯鞘型 和偏芯並列型之複合纖維爲合適。以構成鞘或纖維外周部 之聚烯烴纖維爲，如聚乙烯和聚丙烯。以構成芯成分或纖 維內層部之聚合物爲，比鞘高融點，在加熱黏著處理溫度 不變化之聚合物爲理想。以如此地組合，例如列舉聚乙烯 /聚丙烯、聚乙烯/聚酯、聚丙烯/聚酯之類。此等之聚 合物爲，在不阻害本發明之作用•效果之範圍內即使變性 也不妨害。更且，細絲狀纖維亦佳。例如，列舉三井化學 株式會社之SWP之類。 熱黏著性合成纖維爲，因爲如細就會變爲多的構成纖 維支數、脫落纖維變少、質地變柔。粗的場合爲，纖維間 的空隙變大，變爲體積大的不織布上，可期待刮取的效果 。從而，纖維的粗度若按照用途良好選擇，理想的纖度爲 0.5dt〜50dt，更進一步，理想爲 0.8dt〜30dt。超過 50dt 時抑制切斷紙漿的脫落並不佳。另一方面，未滿0.5 dt時 因欠缺不織布之生產性而無實用性。 而且，熱黏著性合成纖維之長度爲，1〜15 mm爲理 想。因爲纖維短與紙漿之混合性變佳，易爲更均一的不織 布，因變爲未滿1 mm而接近於粉末狀，難以作爲依纖維 間結合的網目構造，不只變爲不能抑制切斷紙漿的脫落， 而且以不織布的強力變低，欠缺實用性而不理想。另一方 面，因變比15mm長而提高不織布的強力，但在不織布製 造之纖維的空氣輸送時彼此間纖維變爲容易纏繞，因爲 使纖維塊狀缺點增大而不理想。特別理想者爲，3〜1 0mm (5) (5)200417644 者。 在表層爲，在上述之熱黏著性合成纖維外，包含嫘縈 類的再生纖維、醋酸鹽類的半合成纖維、聚酯、聚丙烯、 聚醯胺、維尼倫纖維之類的合成纖維、和紙漿、棉、麻之 類的天然纖維的其他纖維亦可。此之場告，在表層熱黏著 性合成纖維的比例爲70〜100%重量百分率爲理想，更理 想爲85〜100%重量百分率。未滿70%重量百分率之場合 爲產生上述之其他之纖維脫落的可能性變多上，不只控制 內層部的紙漿的脫落變少，而且濕潤強力亦變低，產生實 用上的問題。 熱黏著形成表層之此等之纖維，依此之纖維間結合而 在網目狀構造固定紙漿。單位面積重量必需超過5 g/ m2 在12 g/m2以下。在5 g/m2以下，因爲有耐水性合成 纖維的量、及纖維間之結合點數少，不只不能確保耐擦除 充分的濕潤強度，而且容易招致脫落纖維的增大。異於重 視衛生材地吸收性的用途，用於擦除的場合，纖維易脫落 ，如此地不織布以擦拭物和廚房紙巾之類的用途不實用。 另一方面，對超過12 g/m2者，有耐水性之熱黏著之層 容易變厚，在向內層的水分之吸收變爲不充分上，質地也 變硬，仍然欠缺實用性。單位面積重量變大和強度變大但 吸水性低下。然而，若於本發明之範圍，可得在吸水性充 分且在濕潤時亦有強度，纖維亦不脫落、質地柔軟的不織 布。 而且，因爲合成纖維之量多，油的吸收亦佳，因與油 -9- (6) (6)200417644 分親近，亦有容易除污的利點。 內層部爲熱黏著性合成纖維與紙漿纖維以熱黏著而一 體化。熱黏著性合成纖維爲，即使用與表層相同、相異之 物皆可。作爲紙獎纖維’長度爲〇 . 2 m m〜5 m m之粉碎紙獎 爲理想。 內層部之熱黏著性合成纖維與紙漿纖維之混合比率爲 ，熱黏著性合成纖維的比率是，對接著性合成纖維和紙漿 纖維之合計在未滿20%重量百分率時，脫落纖維增加、 強度，特別在濕潤時之強度低下。如此之物，如衛生用品 地，即使沒有強度但可使用於重視吸水性和柔軟性的用途 ，有本發明的目的，但不耐於作爲擦除用不織布的使用。 另一方面，對超過60 %重量百分率，有助於吸收性的紙 漿纖維的量下降，不只欠缺水的擦除性和吸收性，而且質 地變硬欠缺實用性。 因熱黏著性合成纖維之比率變大而強度變大但吸水 性下降。 於其處，充分的強度，特別是在濕潤時的強度、和吸 水性難以並存。 得到擦拭物類和廚房紙巾之類的用途，此等之並存非 常重要。在本發明之比率之範圍開始，保持充分的吸水性 ，而且可得即使濕潤時有充分的強度的不織布。而且，脫 落纖維的量也少，如此地不織布爲，即使髒，在可淸洗擰 乾有充分程度的強度，可數次反覆的使用。而且，因爲熱 合成纖維的比率大，因爲體積可變小 '變薄，包裝性優’ -10- 200417644 省空間也有效。 在於內層，熱黏著性合成纖維彼此間，而且熱黏著性 合成纖維與紙漿纖維被熱黏著。此之內層之單位面積重 量以8〜2 4 0 g / m2爲理想。在未滿8 g / m2時紙漿的量 過少致吸水性不充分，另一方面，超過240 g/ m2時全體 呈現板狀而不適於本用途。 而且，作爲不織布全體，表裏面與內層部之間亦以熱 黏著性合成纖維彼此間而一體化。更且，有充分的熱封性 〇 如此地不織布，若爲乾式不織布，以何種方法製造都 可以，以氣流噴吹法的不織布爲理想。以氣流噴吹法製造 的不織布爲，形成不織布的纖維，因在不織布的長邊方向 、寬幅方向、及厚方向隨機三次元配向所以爲理想。 於此，依氣流噴吹的不織布爲，如以下作用可得。 以所定量被解纖的熱黏著性合成纖維作爲主體，纖維 在空氣氣流中均一分散及搬運，由在設置於吐出部有細孔 的隔幕吹出該纖維，落於在下部設置的金屬或塑膠網上， 一面由網子下部抽出空氣，使上述纖維在網上堆積。接著 ’同樣作用熱黏著性合成纖維與紙漿纖維的混合物，堆積 於上述堆積層上。更且，以熱接著性合成纖維爲主體，使 纖維在這此等層上堆積。 接著’此之熱黏著性合成纖維在充分發揮其之接著效 果之溫度加熱處理全體，可得本發明之乾式紙漿不織布。 在充分發揮接著效果時，需要在比熱黏著性合成纖維之接 -11 - (8) (8)200417644 著成分之融點高15〜4 (TC之溫度下加熱處理。 如此，以氣流噴吹法製造的不織布，能使向不織布的 流動方向、寬幅方向、及厚方向的纖維以隨機3次元配向 。於是，因爲此等熱黏著，不會引起層間剝離。而且，以 氣流噴吹法製造的不織布，因爲均一性良好，性能的差也 變少。 如果必要，更可施行滾筒壓光處理和壓紋處理。 本發明的不織布，長度和寬度的強力之比率爲，乾燥 時及濕潤時同時爲0.8〜1.2，理想爲必需是0.85〜1.2。 若低於那一方的強度則易產生實用上的妨礙。 而且，在乾燥時及濕潤時強力的比率爲，0.6〜1 . 1， 理想爲必需是〇 . 7〜1 · 1。未滿〇 . 6之物爲，比在乾燥時而 濕潤時的強力大幅低下，則是對濕而變弱的不織布，遠離 本發明的意圖，產生實用上的問題。而且，在濕潤時依水 分的存在因纖維間的表面張力而強力上昇，有超過1的場 合，這也在本發明的範圍內，而只要某些以水分之存在而 結合之別的手段不存在，則通常不會超過1 . 1。 適用本發明的不織布的擦拭物類、廚房紙巾類、衛材 類之類中需要適度的水分吸收性，水分吸收性爲，8〜20g /g，理想爲必需是10〜18g/g。在未滿8g/g時，在實 用上欠缺擦除性、水分保持性，有實用上的問題。另一方 面，對超過20g/g，不織布自身保持水分量過多，有操 縱處理性的問題。 以不織布全體的單位面積重量爲，20〜250 g/m2爲 (9) (9)200417644 理想，按照用途，可選擇適合的單位面積重量。 本發明的不織布限於不損及本發明的意圖，與他之層 一體化亦可。例如若與通氣性層一體化，當作本發明的不 織布’通氣性層先置於金屬網上，在其上使纖維逐漸堆積 ，可容易複合層化。 而且，作爲一體化層，例如一般所知的乾式不織布、 濕式不織布、紙、紡黏布、熔噴布、塑膠網、有孔薄膜、 SPRITYARN cross、粗目編織物、寒冷紗之類，以熱黏著 性材料構成層爲理想，且通氣性大者爲理想。 本發明爲，適合化包含熱黏著性合成纖維之表裏層之 單位面積重量，而且依增加內層之熱黏著性合成纖維之量 ，抑制纖維的脫落、不損及吸水性，不織布的強度，在濕 潤時使用和反覆使用的耐用程度能提高。而且水和油的擦 除性也佳，無層間剝離，可得在擦除的用途上非常適合的 不織布。而且，本發明的不織布有充分的熱封性。而且， 生理用品、尿布類的衛生材料，和在醫學的用途同樣合適 〇 而且，本發明的不織布爲以化學黏著劑樹脂不必擔心 殘留聚合物，是衛生的。 更且，不織布的製造工程不排水，在排氣中無化學黏 著劑的單體，環境負荷小。 實施例 提出本發明的實施例說明，但是本發明不限於此等之 •13- (10) 200417644 實施例。 實施例1200417644 (1) 玖, description of the invention [Technical field to which the invention belongs] The present invention relates to a dry pulp nonwoven fabric that is strong despite being wet. More specifically, it relates to wet wipes, kitchen wipes, automobile wipes, kitchen wipes, wipes, kitchen towels, and the like Suitable non-woven fabrics such as hand and body wipes. Furthermore, the present invention relates to the case where it is used in a dry state, and because such applications are often used in the presence of moisture, the same effect can be expected, and the sanitary materials such as physiological articles and diapers, and Nonwovens are also suitable for medical use. [Prior art] Conventionally known dry pulp non-woven fabrics are based on a pulp fiber layer, a polyacrylate-based and polyvinyl acetate-based chemical adhesive is sprayed, coated on the surface layer, and impregnated to form fibers.合 合。 Between combination. In such a non-woven fabric, in terms of increasing the amount of adhesive, the resin will harden when it forms a film, resulting in a low water absorption capacity. In the case of reduction, not only the fiber shedding will increase, but also the strength, especially when inevitably wet Powerful depression. Furthermore, a method of imparting a powdery adhesive resin is considered. In this case, it is difficult to form a film, and the number of bonding points between the pulp fiber and the adhesive is reduced, and the number of detached fibers is likely to increase. As a result, it is difficult to continue to ensure a non-hard texture, moderate water absorption, and less fiber shedding, and to further produce a wet and strong dry pulp nonwoven fabric. -5- (2) (2) 200417644 Non-woven fabrics are used as dry paper awards for absorbent inner materials used in physiological products and household or industrial cleaning purposes. There are layers proposed to be composed of only surface bound fibers. The area weight is 1 to 5 g / m2, and the bonding fibers in the inner layer portion are 2 to 10% by weight of a dry pulp nonwoven fabric (Japanese Patent Publication No. 2000-504792). Regarding the strength of this non-woven fabric, it is sufficient to use the general strength as a sanitary product for absorbing inner materials of physiological products, but it is not to mention that all the major points of the present invention are "wet and strong". The non-woven fabric of the technical content that falls into the scope of the published patent is that the amount of bonded fibers in the inner layer portion is less than 2 to 10% by weight. It is difficult to say that although it is still wet, it even causes low strength when wet, which is not suitable. Wiping off is completely different from the intention of the present invention. In addition, the intersection point of the adhesive fibers formed by thermal adhesion, and a non-woven fabric with a specific tensile strength of air blowing is also proposed. And water absorption, there is no documented technique that inspired the layered structure of the present invention. The conventional nonwoven fabric has the problems described above. [Summary of the Invention] In view of the above-mentioned current situation, the inventor group repeated the results of the intensive review, which is suitable for the unit area weight of the front and back layers including the heat-adhesive synthetic fiber, and according to the increase in the amount of the heat-adhesive synthetic fiber of the inner layer, It was found that the fibers obtained did not fall off, had good water absorption, and were strong, especially in a dry pulp nonwoven fabric with sufficient wet and strong strength to complete the present invention. -6- (3) (3) 200417644 [Embodiment] The present invention is a surface layer comprising thermally adhesive synthetic fibers which thermally adhere to each other and have a unit area weight of more than 5g / m2 and less than 12g / m2. It is made of heat-adhesive synthetic fibers and pulp fibers at a weight percentage of 20/80 ~ 60/40, and is made by thermally adhering the synthetic fibers to each other and / or synthetic fibers and pulp fibers to make a unit area. The inner layer with a weight of more than 8 ~ 24 Og / m2, as a whole, is integrated between the inner surface and the inner layer according to the thermal adhesion of the synthetic fibers. The ratio of the strength of the length to the width is dry. Time and wet time at the same time 'is 0.8 · 1 ~ 2, the ratio of strength when dry and wet is 0.6 ~ 1 · 1, the absorbency of water is 8 ~ 20g / g, and the total unit weight is 20 ~ 25 0 g / m2 is a dry pulp non-woven fabric with an integrated layered structure (hereinafter referred to as "dry non-woven fabric"). Embodiments of the present invention will be described below. The non-woven fabric of the present invention has a three-layer structure with an inner layer composed of heat-adhesive synthetic fibers and pulp fibers, and a surface layer including the heat-adhesive synthetic fibers holding it, and is integrated by heat-adhesion. In the present invention, the main component that forms the surface layer or the heat-adhesive synthetic fiber mixed with the pulp is any one that can be combined with each other even by heat, and the pulp can be fixed according to the mesh structure of the fibers. Polymers with a high affinity for pulp fibers are particularly good. For example, polyolefin fiber type, unsaturated carboxylic acid type grafting, polyolefin fiber type, polyester type, and polyvinyl alcohol fiber are listed. (4) '(4)' 200417644 Within this range, polyolefin fiber-based heat-adhesive synthetic fibers, core-sheath type and eccentric side-by-side type composite fibers are suitable. Polyolefin fibers, such as polyethylene and polypropylene, constituting the sheath or the outer periphery of the fiber are used. It is preferable that the polymer constituting the core component or the inner layer portion of the fiber has a higher melting point than the sheath, and a polymer that does not change at the heat-adhesive treatment temperature. Examples of such combinations include polyethylene / polypropylene, polyethylene / polyester, and polypropylene / polyester. These polymers are not detrimental even if they are denatured within a range that does not hinder the action and effect of the present invention. Moreover, filamentous fibers are also preferable. For example, Mitsui Chemicals Co., Ltd. SWP and the like are listed. The heat-adhesive synthetic fibers are composed of a larger number of constituent fibers, a smaller number of dropped fibers, and a softer texture. When it is thick, the space between the fibers becomes large and becomes a bulky non-woven fabric, and the effect of scraping can be expected. Therefore, if the thickness of the fiber is appropriately selected according to the application, the ideal fineness is 0.5 dt to 50 dt, and more preferably, it is 0.8 dt to 30 dt. When it exceeds 50dt, it is not good to suppress the shedding of the cut pulp. On the other hand, if it is less than 0.5 dt, it is not practical because of the lack of productivity of non-woven fabrics. The length of the heat-adhesive synthetic fiber is preferably 1 to 15 mm. Because the short fiber and the pulp have better mixing properties, it is easy to be a more uniform non-woven fabric. It becomes close to powder because it becomes less than 1 mm. It is difficult to use as a mesh structure based on the bonding between fibers. It falls off, and the strength of the non-woven fabric is low, which is not ideal because it is not practical. On the other hand, the strength of the non-woven fabric is increased because it becomes longer than 15 mm. However, the fibers of the non-woven fabric are easily entangled with each other during air transportation, which is not preferable because the defects of the fiber mass are increased. Particularly desirable is 3 to 10 mm (5) (5) 200417644. On the surface layer, in addition to the above-mentioned heat-adhesive synthetic fibers, synthetic fibers such as fluorene-based recycled fibers, acetate-based semi-synthetic fibers, polyester, polypropylene, polyamide, and vinylon fibers, and Other fibers such as natural fibers such as pulp, cotton, and hemp can also be used. It has been reported that the proportion of the heat-adhesive synthetic fibers on the surface layer is preferably 70 to 100% by weight, and more preferably 85 to 100% by weight. In the case of less than 70% by weight, in order to increase the possibility of the other fibers falling out, not only the pulp shedding in the inner layer portion is reduced, but the wet strength is also lowered, which causes practical problems. These fibers, which are heat-adhered to form a surface layer, bond the pulp to fix the pulp in a mesh structure. The weight per unit area must exceed 5 g / m2 and less than 12 g / m2. Below 5 g / m2, the amount of water-resistant synthetic fibers and the number of bonding points between the fibers are small, which not only cannot ensure sufficient wet strength for erasing resistance, but also tends to cause an increase in exfoliated fibers. The use is different from the absorption of hygienic materials. The fiber is easy to fall off when it is used for erasing. It is not practical to use non-woven cloth for wipes and kitchen towels. On the other hand, for those over 12 g / m2, the heat-adhesive layer with water resistance tends to thicken, the absorption of moisture into the inner layer becomes insufficient, the texture becomes hard, and it still lacks practicality. The weight per unit area increases and the strength increases but the water absorption is low. However, within the scope of the present invention, it is possible to obtain a non-woven fabric that is sufficiently absorbent and has strength when wet, and that the fibers do not fall off and have a soft texture. In addition, because the amount of synthetic fibers is large, oil absorption is also good. Because it is close to oil, it also has the advantage of easy decontamination. The inner layer is made of heat-adhesive synthetic fibers and pulp fibers integrated by thermal adhesion. The heat-adhesive synthetic fibers are the same as those used in the surface layer. It is ideal as a paper award fiber's pulverized paper award with a length of 0.2 mm to 5 mm. The mixing ratio of the heat-adhesive synthetic fibers and pulp fibers in the inner layer portion is as follows. The ratio of the heat-adhesive synthetic fibers to the total of the adhesive synthetic fibers and the pulp fibers is less than 20% by weight. , Especially when wet, the strength is low. Such articles, such as sanitary articles, can be used for applications where water absorption and softness are important even if they do not have strength. They have the object of the present invention, but they are not resistant to use as a nonwoven fabric for erasing. On the other hand, for more than 60% by weight, the amount of pulp fibers that contribute to absorbency is reduced, not only lacking water erasability and absorbency, but also hardening texture and lacking practicality. As the ratio of the heat-adhesive synthetic fibers increases, the strength increases but the water absorption decreases. For this reason, sufficient strength, particularly when wet, and water absorption are difficult to coexist. It is very important to obtain applications such as wipes and kitchen towels. Starting from the range of the ratio of the present invention, a non-woven fabric having sufficient strength even when wet can be obtained while maintaining sufficient water absorption. In addition, the amount of dropped fibers is small. Such a non-woven fabric has sufficient strength to be washed and wrung even if it is dirty, and can be used repeatedly. Moreover, because the ratio of thermosynthetic fibers is large, because the volume can be made smaller, it becomes thinner and has better packaging properties. -10- 200417644 Space saving is also effective. In the inner layer, the heat-adhesive synthetic fibers are thermally adhered to each other. The unit area weight of the inner layer is preferably 8 to 240 g / m2. When the amount of pulp is less than 8 g / m2, the amount of pulp is too small, which causes insufficient water absorption. On the other hand, when the amount exceeds 240 g / m2, the whole is plate-like and is not suitable for the purpose. Furthermore, as the entire non-woven fabric, the front and back surfaces and the inner layer portion are integrated with each other by heat-adhesive synthetic fibers. Furthermore, it has sufficient heat-sealability. As such a nonwoven fabric, if it is a dry-type nonwoven fabric, it can be produced by any method, and a nonwoven fabric using an air jet method is preferred. Non-woven fabrics produced by air blowing are ideal for fibers forming non-woven fabrics, which are randomly oriented in three dimensions in the long, wide, and thick directions of the non-woven fabric. Here, the non-woven fabric sprayed by air flow is as follows. Mainly based on the determined amount of thermally adhesive synthetic fibers that are defibrated, the fibers are uniformly dispersed and transported in the air stream, the fibers are blown out by a curtain with fine holes in the discharge section, and fall on the metal or plastic provided in the lower part On the net, air is drawn from the lower part of the net, so that the above fibers accumulate on the net. Next, a mixture of heat-adhesive synthetic fibers and pulp fibers acts on the same and is deposited on the above-mentioned accumulation layer. Furthermore, the main body is a thermally-adhesive synthetic fiber, and the fibers are deposited on these layers. Then, the heat-adhesive synthetic fiber is heat-treated at a temperature at which the adhesive effect is fully exerted to obtain the dry pulp nonwoven fabric of the present invention. In order to fully exert the bonding effect, it is necessary to heat-treat at a temperature 15 ~ 4 (TC higher than the melting point of the composition of the heat-adhesive synthetic fiber -11-(8) (8) 200417644.) The manufactured nonwoven fabric can align fibers in the flow direction, width direction, and thickness direction of the nonwoven fabric at random 3 dimensions. Therefore, due to such thermal adhesion, interlayer peeling does not occur. Moreover, it is manufactured by air blowing method The non-woven fabric has less uniformity due to its good uniformity. If necessary, it can be subjected to roller calendering and embossing treatment. The non-woven fabric of the present invention has a strength ratio of length and width of both at the time of drying and when it is wet. 0.8 to 1.2, preferably 0.85 to 1.2. If the strength is lower than that, practical obstacles are likely to occur. In addition, the ratio of strength when dry and wet is 0.6 to 1.1. Ideally, it is necessary to be 〇7 ~ 1 · 1. The content of less than 0.6 is significantly lower than the strength when it is dry and wet. It is a non-woven fabric that becomes weak and weak, far from the intention of the present invention, and causes practical problems. In addition, when wet, due to the presence of moisture, the surface tension between the fibers increases strongly. If it exceeds 1, this is also within the scope of the present invention. As long as some other means combined with the presence of moisture does not exist, , It usually does not exceed 1.1. Moderate moisture absorption is required in the non-woven wipes, kitchen towels, sanitary materials, etc. to which the present invention is applied, and the moisture absorption is 8 to 20 g / g, ideally It must be 10 to 18 g / g. When it is less than 8 g / g, it is practically lacking in erasability and moisture retention, which has practical problems. On the other hand, for more than 20 g / g, the nonwoven fabric itself retains too much moisture There is a problem in handling properties. The unit weight of the entire non-woven fabric is 20 to 250 g / m2 as (9) (9) 200417644 Ideally, a suitable unit weight can be selected according to the application. The non-woven fabric of the present invention is not limited to Impairing the intention of the present invention, it may be integrated with other layers. For example, if it is integrated with the air-permeable layer, the air-permeable layer of the nonwoven fabric of the present invention is first placed on a metal mesh, and fibers are gradually accumulated thereon. Can be easily restored In addition, as the integrated layer, for example, generally known dry nonwoven fabric, wet nonwoven fabric, paper, spunbond fabric, meltblown fabric, plastic mesh, perforated film, SPRITYARN cross, coarse mesh knitted fabric, cold yarn, etc. The layer composed of a heat-adhesive material is ideal, and the one having a large air permeability is ideal. The present invention is suitable for the weight per unit area of the surface layer including the heat-adhesive synthetic fiber, and the inner layer of the heat-adhesive synthetic fiber is increased The amount of fiber can be prevented from falling off, without damaging water absorption, the strength of the non-woven fabric, and the durability during use and repeated use can be improved. It also has good erasability with water and oil. Very suitable for the use of non-woven fabrics. The nonwoven fabric of the present invention has sufficient heat-sealability. In addition, sanitary materials such as sanitary products and diapers are suitable for medical use. Moreover, the non-woven fabric of the present invention is made of a chemical adhesive resin without having to worry about residual polymer, and is hygienic. Furthermore, the manufacturing process of nonwoven fabrics does not drain water, there is no monomer with chemical adhesive in the exhaust gas, and the environmental load is small. Examples A description of examples of the present invention is provided, but the present invention is not limited to these. 13- (10) 200417644 Examples. Example 1
以表裏層部之熱黏著性合成纖維，用芯爲聚乙烯對苯 二甲酸酯、鞘爲聚乙烯的芯鞘型複合纖維（帝人 FIBER 株式會社製· F6。2.2dt、長度 5mm)，用作爲內層部爲 ，用芯爲聚丙烯、鞘爲共聚合聚乙烯之複合纖維，（ CHISSO POLYPRO 纖維株式會社· IN T A C。1 . 7 d t，長度 5mm)和、紙獎（Weyerhaeuser 公司製· NB416Kraft)以 各個30%重量百分率、70%重量百分率之比例混合，以 氣流噴吹法1 4 5 °C加熱溫度製造不織布。 表裏層之單位面積重量爲6 g/m2、內層之單位面積 重量爲33 g/m2。厚度爲0.54mm。 長度、寬度的強力，其之比率、其之乾燥時與濕潤時 之比率、吸水性之類的物性表示於表1A core-sheath type composite fiber (made by Teijin Fiber Co., Ltd. · F6. 2.2 dt, 5 mm in length) using a core-sheath synthetic fiber having a core and a polyethylene terephthalate as a core and a heat-adhesive synthetic fiber on the front and back layers. As the inner layer, a composite fiber with a core of polypropylene and a sheath of copolymerized polyethylene (CHISSO POLYPRO Fiber Co., Ltd. · IN TAC. 1.7 dt, 5 mm in length) and the paper award (made by Weyerhaeuser Corporation · NB416Kraft) ) Were mixed at a ratio of 30% by weight and 70% by weight, and a non-woven fabric was produced by heating at a temperature of 1 45 ° C by an air jet method. The basis weight of the front and back layers is 6 g / m2, and the basis weight of the inner layer is 33 g / m2. The thickness is 0.54mm. The strength of the length and width, their ratios, their dry and wet ratios, and their physical properties such as water absorption are shown in Table 1.
而且，強力、吸水性以以下的方法測定。 (1)強力：依JIS L-1913。但是試驗片的寬幅爲 2 5 m m，抓間隔爲1 0 0 m m。 (2 )吸水性：由預先測重的 100mm X 1 00mm的試驗 片浸漬在20 °C的水中一分鐘，在傾斜45度的玻璃板上放 置一分鐘，之後再度測定重量，依次式算出吸水性。 ① 對面積的吸水性（g / m2 ):已吸水的水重，除以 試驗片的面積，以g/m2表示。 ② 對己重的吸水性（g/ g ):以已吸水的水重’除以 -14· (11) (11)200417644 試驗片的重量’以g/g表示。 實施例2 g裏層部的接著性複合纖維與紙漿的比率爲90/10 ，單位面積重量爲8 g/m2’內層部之接著性複合纖維與 紙漿的比率爲25/75，單位面積重量爲49 g/m2其他全 部與實施例1相同，以氣流噴吹法製造不織布。 厚度爲〇.68mm。 實施例3 表裏層部的單位面積重量爲10 g/m2，內層部之接 著性複合纖維與紙漿的比率爲4〇/60，單位面積重量爲 1 00 g/ m2其他全部與實施例1相同，以氣流噴吹法製造 不織布。 比較例1 表裏層部的單位面積重量爲4 g/m2，內層部之接著 性複合纖維與紙漿的比率爲8 / 92，單位面積重量爲52 g / m2其他全部與實施例1相同’以氣流噴吹法製造不織 布。 比較例2 表裏層部的單位面積重量爲I6g/m2，內層部之接 著性複合纖維與紙漿的比率爲7 〇 / 3 0，單位面積重量爲 -15- (12) 200417644 2 3 g / m2其他全部與實施例1相同，以氣流噴吹法製造不 織布。 比較例3The strength and water absorption were measured by the following methods. (1) Strength: According to JIS L-1913. However, the width of the test piece was 25 mm, and the grasping interval was 100 mm. (2) Water absorption: 100mm X 100mm test piece weighed in advance was immersed in water at 20 ° C for one minute, placed on a glass plate inclined at 45 degrees for one minute, and then the weight was measured again, and the water absorption was calculated sequentially. . ① Water absorption to area (g / m2): The weight of water that has been absorbed, divided by the area of the test piece, expressed in g / m2. ② Absorptivity (g / g) to own weight: Divide the weight of water that has been absorbed 'by -14 · (11) (11) 200417644 The weight of the test piece' is expressed in g / g. Example 2 The ratio of the adhesive composite fiber to the pulp in the g inner layer portion is 90/10, and the basis weight is 8 g / m2 '. The ratio of the adhesive composite fiber to the pulp in the inner layer portion is 25/75, and the basis weight is It was 49 g / m2, and other things were the same as in Example 1. A nonwoven fabric was produced by an air-jet method. The thickness is 0.68 mm. Example 3 The weight per unit area of the front and back layers is 10 g / m2, the ratio of the adhesive composite fiber to the pulp in the inner layer is 40/60, and the weight per unit area is 100 g / m2. The rest is the same as in Example 1. , Non-woven fabrics are produced by air blowing. Comparative Example 1 The basis weight of the front and back layers was 4 g / m2, the ratio of the adhesive fiber to the pulp in the inner layer was 8/92, and the basis weight was 52 g / m2. Non-woven fabrics are produced by air jet. Comparative Example 2 The basis weight of the front and back layer portions was 16 g / m2, the ratio of the adhesive composite fiber to the pulp in the inner layer portion was 70/30, and the basis weight was -15- (12) 200417644 2 3 g / m2 The rest is the same as in Example 1, and a nonwoven fabric was manufactured by the air-jet method. Comparative Example 3
僅以單位面積重量爲58 g/ 的紙漿製作氣流噴吹 不織布，聚丙烯酸酯的乳狀液，以固形分成爲8 g/ m2地 授與含浸，以熱風溫度1 3 0 °C乾燥，作爲樹脂型的氣流噴 吹不織布。 以上述之實施例和比較例得之不織布的物性於表1所 〇 -16 - (13) 200417644 (13)The air-blown nonwoven fabric and polyacrylate emulsion were made from pulp with a weight per unit area of 58 g /, and impregnated with a solid content of 8 g / m2, and dried at a hot air temperature of 130 ° C as a resin. Non-woven fabrics are blown by airflow. The physical properties of the non-woven fabric obtained from the above examples and comparative examples are shown in Table 1. -16-(13) 200417644 (13)
〔表1〕 項目 實施例 1 實施例 2 實施例 3 比較例 1 比較例 2 比較例3 表 裏 面 層 組成 PET/PE複合纖 維(2.2dt x5mm) 100% 90% 100% 100% 100% 丙烯樹脂 8 g/m2， 紙漿 55 g/m2 紙漿 • 10% - 單位面積 重量 g/m2 6 8 10 4 16 內 層 組成 PP/PE複合纖維 (1.7dtx5mm) 30% 25% 40% 8% 70% 紙漿 70% 75% 60% 92% 30% p q /丄 77~T 單{αι面積 重量 g/m2 33 49 100 52 32 不 織 布 物 性 單位面積重量(g/m2) 45 65 120 60 55 63 厚度(mm) 0.54 0.68 1.30 0.78 0.50 0.73 乾強力 (N/25mm) 長度 11.3 9.3 34.5 5.1 15.0 7.9 寬度 9.9 9.0 33.8 4.7 15.2 6.0 比率 (寬度/長度） 0.88 0.97 0.98 0.92 1.01 0.76 濕強力 (N/25mm) 長度 9.0 7.9 31.2 2.3 14.8 3.1 寬度 9.2 7.5 30.8 1.9 15.0 2.5 比率 (寬度/長度） 1.02 0.95 0.99 0.83 1.01 0.81 乾濕強力比 率(長度） 濕/乾 0.80 0.85 0.90 0.45 0.99 0.39 吸水性 g/m2 538 790 1080 960 385 882 g/g 12.0 12.2 9.0 16 7 14 -17- (14) (14)200417644 產業上之利用可能性 以本發明之一體化層狀構造的乾式紙漿不織布，適合 使用在濕狀地板用、廚房用、汽車用之類之對物擦拭物， 和淸掃調理器具、擦淨食材、吸收滴落物用之類廚房紙巾 ，和臉、手、身體之類對人擦拭物之類。更且，亦同樣合 適在生理用品、尿布類的衛生材料’和在醫學的用途。[Table 1] Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 PET / PE composite fiber (2.2dt x 5mm) on the surface layer composition 100% 90% 100% 100% 100% acrylic resin 8 g / m2, pulp 55 g / m2 pulp • 10%-Weight per unit area g / m2 6 8 10 4 16 Inner layer composition PP / PE composite fiber (1.7dtx5mm) 30% 25% 40% 8% 70% 70% pulp 75% 60% 92% 30% pq / 丄 77 ~ T single (αι area weight g / m2 33 49 100 52 32 non-woven physical unit weight (g / m2) 45 65 120 60 55 63 thickness (mm) 0.54 0.68 1.30 0.78 0.50 0.73 Dry strength (N / 25mm) Length 11.3 9.3 34.5 5.1 15.0 7.9 Width 9.9 9.0 33.8 4.7 15.2 6.0 Ratio (width / length) 0.88 0.97 0.98 0.92 1.01 0.76 Wet strength (N / 25mm) Length 9.0 7.9 31.2 2.3 14.8 3.1 Width 9.2 7.5 30.8 1.9 15.0 2.5 Ratio (width / length) 1.02 0.95 0.99 0.83 1.01 0.81 Wet / dry strength ratio (length) Wet / dry 0.80 0.85 0.90 0.45 0.99 0.39 Water absorption g / m2 538 790 1080 960 385 882 g / g 12.0 12.2 9.0 16 7 14 -17- (14) (14) 200417644 Possibility of industrial utilization The dry pulp non-woven fabric of the integrated layered structure of the present invention is suitable for use on wet floor, kitchen, automobile, and the like, as well as cleaning and conditioning appliances, cleaning materials, and absorbing drips. Kitchen towels, and face, hand, body wipes and the like. Furthermore, it is also suitable for use in sanitary materials, sanitary materials such as diapers, and medical applications.
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