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玖、發明說明 【發明所屬之技術領域】 本發明爲有關雖濡濕但強度仍強的乾式紙漿不織布。 更詳細而言是有關在濡濕狀態使用的地板用、廚房用、汽 車用等之對物擦拭物，和清掃調理器具、擦淨食材、吸收 滴落物用等的之類廚房紙巾，和臉、手、身體等的對人擦 拭物等合適的不織布。更進一步，本發明爲有關在乾燥狀 態使用的場合，因爲在此等用途多存在有水分的場合，可 期待相同的效果，而且生理用品、尿布類的衛生材料，和 在醫學的用途亦可適用的不織布。 【先前技術】 以往爲人所熟知的乾式紙漿不織布是以紙漿纖維層作 爲基底，將聚丙烯酸酯系或聚醋酸乙烯系等的化學黏著劑 樹脂噴霧、塗佈於表層或浸漬其整體而形成纖維間結合。 以上的不織布中，一旦黏著劑量增加時，樹脂會形成 膜而變硬，導致水分吸收能力的降低，而在減少的場合則 不只是增大纖維的脫落，而且不可避免的對於強度，特別 是濕潤時強度的降低。 而且，考慮賦與粉末狀黏著劑樹脂的方法，在此時， 難以形成皮膜，而紙漿纖維與黏著劑的黏著點數變少，脫 落纖維容易變多。從而，持續確保不過硬的觸感視覺、適 度的吸水性、少纖維的脫落，可耐實用的強度等，更進一 步製作濕潤強度優良的乾式紙漿不織布困難。 -5- 1324195 一一… 乾式紙漿不織布作爲使用在生理用品之吸收內側材料 和家庭或工業用之洗淨用途者’提出僅由表面之結合纖維 構成層的單位面積重量爲1〜5 g/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）。 有關此不織布的強度，關於通常的強度作爲如生理用 品之吸收內襯材的衛生用品的用途並不充分，且並未述及 任何有關本發明主要「雖濡濕但強度仍強」的重點。關於 此公開申請專利範圍的技術內容的不織布爲內層部之結合 纖維的量少於2〜1 0重量％ ’難謂雖濡濕但強度仍強，甚 至因濕潤導致強力明顯降低，不適於擦拭，完全異於本發 明之意圖。 而且’提出一種熱黏著黏著劑纖維的交點所形成的具 有特定拉裂強度的氣流噴吹不織布（日本特開 2000-345454號公報）’但是與紙漿複合的場合，完全未 述及濕潤強度和吸水性，完全沒有記載有暗示作爲本發明 層狀構造之技術。 在以往的不織布中有上述的問題。 【發明內容】 本發明人有鑑於上述的現狀，重覆專心硏究的結果， 適合化包含熱黏著性合成纖維之表背面的表層部的單位面 積重量，而且依內層之熱黏著性合成纖維量的增加，發現 可獲得纖維不脫落、吸水性佳、且強，特別在濕潤強度充 -6-BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry pulp non-woven fabric which is wet but strong in strength. More specifically, it relates to a kitchen wipe for flooring, kitchen, and automobiles used in a damp state, and a kitchen towel such as a cleaning and conditioning device, a wiping material, and a dripping object, and a face, A suitable non-woven fabric such as a human body wipe such as a hand or a body. Furthermore, the present invention relates to the use in a dry state, and in the case where moisture is often present in such applications, the same effect can be expected, and physiological materials, sanitary materials for diapers, and medical uses can also be applied. Non-woven. [Prior Art] A conventional dry pulp nonwoven fabric is known in which a pulp fiber layer is used as a base, and a chemical adhesive resin such as polyacrylate or polyvinyl acetate is sprayed on a surface layer or impregnated to form a fiber. Combination. In the above non-woven fabric, once the adhesive dose is increased, the resin forms a film and becomes hard, resulting in a decrease in moisture absorption capacity, and in the case of reduction, not only increases the shedding of the fiber, but also inevitably for strength, especially wetness. The intensity is reduced. Further, in consideration of the method of imparting a powdery adhesive resin, it is difficult to form a film at this time, and the number of adhesion points of the pulp fiber and the adhesive is small, and the number of the detached fibers is likely to increase. Therefore, it is difficult to continuously produce a dry pulp non-woven fabric having excellent wet strength, while ensuring a hard touch, a moderate water absorption, a small amount of fiber falling off, and a practical strength. -5- 1324195 One-to-one... Dry pulp non-woven fabric is used as a sinking material for physiological products and for household or industrial use. It is proposed that the weight per unit area of the layer composed only of the bonded fibers of the surface is 1 to 5 g/m2. The bonded fiber of the inner layer portion is a dry pulp non-woven fabric of 2 to 10% by weight (Japanese Patent Publication No. 2000-504792). Regarding the strength of the nonwoven fabric, the use of the usual strength as a sanitary article such as an absorbent lining material for physiological products is not sufficient, and there is no mention of any of the main points of the present invention which are "deep but wet but strong in strength". The non-woven fabric of the technical content of the scope of this disclosure is such that the amount of the bonding fibers of the inner layer portion is less than 2 to 10% by weight. It is difficult to say that although it is wet, the strength is still strong, and even the strength is significantly lowered by the wetting, and it is not suitable for wiping. It is completely different from the intention of the present invention. Further, 'the air jet blowing non-woven fabric having a specific tensile strength formed by the intersection of the heat-adhesive adhesive fibers is proposed (JP-A-2000-345454)', but in the case of compounding with the pulp, the wet strength and the water absorption are not mentioned at all. There is no description at all of the technique suggesting the layered structure of the present invention. The above problems have been encountered in conventional nonwoven fabrics. SUMMARY OF THE INVENTION The present inventors have, in view of the above-mentioned state of the art, repeated the results of intensive research, and are suitable for the basis weight of the surface layer portion including the front and back surfaces of the heat-adhesive synthetic fiber, and the heat-adhesive synthetic fiber according to the inner layer. The increase in the amount of fiber is found to be non-shedding, good in water absorption, and strong, especially in wet strength.
1324195 -. * 99. ί. 26 :Μ 分的乾式紙漿不織布，完成本發明。 【實施方式】 本發明爲包含熱黏著性合成纖維，該合成纖維彼此間 熱黏著成單位面積重量超過5g/m2且12g/m2以下之兩 面的表層部；及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，該合成纖維彼此 間及/或合成纖維和紙漿纖維熱黏著成單位面積重量爲8 φ 〜240g/ m2的內層部所組成，整體上，在表背面的表層 部與內層部之間同樣藉著該合成纖維彼此間之熱黏著而形 成一體化，長度與寬度的強度之比値爲乾燥時與濕潤時皆 爲0.8〜1.2，在乾燥時與濕潤時強度之比値爲〇.6〜1.1， 水分之吸收性爲 8〜20g/g，且總單位面積重量20〜250 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。 @ 本發明之不織布爲由熱黏著性合成纖維和紙漿纖維構 成之內層、與包含夾持此之熱黏著性合成纖維之表層作爲 3層構造，以熱黏著形成一體化。 本發明中，形成表層之主成分、或以與紙漿混合之熱 _ 黏著性合成纖維爲以熱熔融相互結合之其中之一即可，依 ' 此纖維間結合之網眼構造固定紙漿，但是以使用與紙漿纖 維親和性大的聚合物之纖維尤佳。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 1324195 % A 猶頁 烯醇纖維等。 其中’聚烯烴纖維系熱黏著性合成纖維以芯鞘型和偏 芯並列型之複合纖維爲合適。構成鞘或纖維外周部之聚烯 烴纖維可舉例如聚乙烯和聚丙烯。構成芯成分或纖維內層 部之聚合物比鞘高融點，以加熱黏著處理溫度不變化之聚 合物爲理想。以上的組合，例如列舉聚乙烯/聚丙烯、聚 乙烯/聚酯、聚丙烯/聚酯等。此等之聚合物在不阻礙本 發明之作用•效果之範圍內即使變性也無妨。更且，細絲 狀纖維亦佳。例如可列舉三井化學株式會社之SWP等。 熱黏著性合成纖維因爲細就會變爲多的構成纖維支數 ’因此脫落纖維變少、觸感視覺變柔和。粗的場合，纖維 間的空隙變大’變爲體積大的不織布之外，可期待刮取的 效果。從而’纖維的粗度雖可按照用途加以選擇，但是理 想的纖度爲〇.5dt〜50dt，更進一步，理想爲0.8dt〜30dt 。超過50dt時並不能抑制紙漿的脫落而不理想。另—方 面，小於0.5dt時因不織布之生產性不足而無實用性。 而且，熱黏著性合成纖維之長度1〜15mm爲理想。 雖然纖維短與紙漿之混合性變佳，可更容易形成均一的不 織布，但是小於1 mm時接近粉末狀，難以作爲纖維間結 合的網眼構造，不只不能抑制紙漿的脫落，而且作爲不織 布的強度變低，缺之實用性而不理想。另一方面，比 15 mm長時雖會提高不織布的強度，但在不織布製造時纖 維的空氣輸送中纖維彼此間變爲容易纏繞，使纖維塊狀缺 點增大而不理想。特別理想者爲3〜10mm。 -8- 13241951324195 -. * 99. ί. 26 : The dry pulp non-woven fabric of Μ is completed to complete the present invention. [Embodiment] The present invention relates to a heat-adhesive synthetic fiber which is thermally adhered to each other to have a surface portion having a basis weight of more than 5 g/m 2 and less than 12 g/m 2 ; and a thermally adhesive synthetic fiber and pulp fiber Mixing at a ratio of weight ratio of 20/80 to 60/40, the synthetic fibers are thermally bonded to each other and/or synthetic fibers and pulp fibers are formed into an inner layer portion having a basis weight of 8 φ to 240 g/m 2 , as a whole. The surface layer portion and the inner layer portion on the back surface of the watch are also integrally formed by thermal adhesion of the synthetic fibers to each other, and the ratio of the strength of the length to the width is 0.8 to 1.2 in both dry and wet conditions. The ratio of the strength at the time of drying to the strength at the time of wetting is 〇6 to 1.1, the absorbency of water is 8 to 20 g/g, and the total basis weight is 20 to 250 g/m2, and the dry pulp of the integrated layered structure is characterized. Non-woven fabric (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 is an inner layer composed of a heat-adhesive synthetic fiber and a pulp fiber, and a surface layer containing a heat-adhesive synthetic fiber sandwiched therebetween as a three-layer structure, and is integrally formed by heat adhesion. In the present invention, the main component of the surface layer or the heat-adhesive synthetic fiber mixed with the pulp may be one of heat-melt-bonded, and the pulp may be fixed by the mesh structure of the fiber, but It is especially preferred to use a fiber having a polymer having a high affinity for pulp fibers. For example, a polyolefin fiber, a polyester, a polyethylene 2324195 % A, and a polyhexene alcohol fiber are exemplified by grafting a polyolefin fiber or an unsaturated carboxylic acid. Among them, the polyolefin fiber-based heat-adhesive synthetic fiber is preferably a core-sheath type and a eccentric type composite fiber. The polyolefin fibers constituting the outer periphery of the sheath or fiber may, for example, be polyethylene and polypropylene. It is preferable that the polymer constituting the core component or the inner layer of the fiber has a higher melting point than the sheath, and it is preferable to heat the polymer whose adhesive treatment temperature does not change. The combination of the above includes, for example, polyethylene/polypropylene, polyethylene/polyester, polypropylene/polyester, and the like. These polymers may be denatured even if they do not impair the effects and effects of the present invention. Moreover, fine filament fibers are also preferred. For example, SWP of Mitsui Chemicals Co., Ltd., etc. are mentioned. The heat-adhesive synthetic fiber becomes a constituent fiber count because it is fine, so that the amount of the fiber is reduced and the touch is softened. In the case of a thick case, the gap between the fibers becomes large. In addition to the non-woven fabric having a large volume, the effect of scraping can be expected. Therefore, the thickness of the fiber can be selected according to the use, but the desired fineness is 〇5dt to 50dt, and further, it is preferably 0.8dt to 30dt. When it exceeds 50 dt, it does not inhibit the detachment of the pulp. On the other hand, when it is less than 0.5dt, there is no practicality due to insufficient productivity of non-woven fabric. Further, the length of the heat-adhesive synthetic fiber is preferably 1 to 15 mm. Although the shortness of the fiber and the pulp are better, it is easier to form a uniform non-woven fabric, but when it is less than 1 mm, it is close to a powder, and it is difficult to be a mesh structure in which fibers are bonded, and not only the peeling of the pulp but also the strength of the non-woven fabric cannot be suppressed. It becomes lower and lacks practicality and is not ideal. On the other hand, although the strength of the non-woven fabric is increased when it is longer than 15 mm, the fibers are easily entangled with each other during the air transport of the fibers at the time of fabricating the nonwoven fabric, and it is not preferable to increase the blockiness of the fiber. Particularly ideal is 3 to 10 mm. -8- 1324195
在表層除了上述之熱黏著性合成纖維外，包含嫘縈等 _ 的再生纖維、醋酸鹽等的半合成纖維、聚酯、聚丙燃、聚 酿胺、維尼倫纖維等的合成纖維和紙獎、棉、麻等的天$ 纖維的其他纖維亦可。此時，表層的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85〜1〇〇重 量百分率。小於70 %重量百分率之場合產生上述其他纖 維脫落的可能性變多之外，不只抑制內層部紙漿的脫落效 果降低，而且濕潤強度亦變低，產生實用上的問題。 φ 熱黏著形成表層之此等纖維，依此纖維間結合的網眼 構造固定紙漿。單位面積重量必需超過5 g/m2且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，不只不能確保耐擦拭用充分的濕 潤強度，而且容易導致脫落纖維的增大。與重視如衛生材 的吸收性的用途不同，用於擦拭的場合，纖維容易脫落， 如此的不織布以擦拭物和廚房紙巾等的用途上並不實用。 另一方面，超過12 g/m2時，有耐水性之熱黏著層容易 春 變厚，在向內層的水分之吸收除了變得不充分之外，觸感 視覺也變硬，仍然欠缺實用性。單位面積重量變大時強度 變大但吸水性降低。然而，若於本發明之範圍，即使吸水 性充分且在濕潤時仍可獲得具有強度，纖維不脫落、觸感 ‘ 視覺柔軟的不織布。 而且’因爲合成纖維的量多，油的吸收亦佳，因與油 易於融入，亦有容易除污的利點。 內層部是以熱黏著使熱黏著性合成纖維與紙漿纖維而 -9- 1324195 .啤換頁 9舉 p!. 一體化。熱黏著性合成纖維爲可以使用與表層相同或不同 皆可。作爲紙漿纖維，以長度爲0.2mm〜5mm之粉碎紙漿 爲理想。 內層部之熱黏著性合成纖維與紙漿纖維之混合比値爲 ，熱黏著性合成纖維的比値相對於黏著性合成纖維和紙漿 纖維之合計在小於20重量百分率時，脫落纖維增加、強 度，特別在濕潤時之強度降低。如此，如衛生用品，即使 沒有強度但可使用於重視吸水性和柔軟性的用途，但不能 使用於有本發明目的的作爲擦拭用不織布。另一方面，對 超過60重量百分率，會使得賦予吸收性的紙漿纖維量減 少，不只擦拭性和吸收性不足，而且觸感視覺變硬實用性 不足。 熱黏著性合成纖維之比値變大而強度變大但吸水性下 降。 因此，充分的強度，特別是在濕潤時的強度、和吸水 性難以並存。 對於擦拭物和蔚房紙巾類的用途，此等的並存非常重 要。在本發明之比値範圍中，首先保持充分的吸水性，而 且即使濕潤時仍可獲得充分強度的不織布。而且，脫落纖 維的量也少，如此的不織布即使髒仍可清洗擰乾具有充分 程度的強度，可數次反覆的使用。而且，因爲熱合成纖維 的比値大，因爲體積可變小、變薄，使用性佳’省空間也 有效。 在內層，熱黏著性合成纖維彼此間’而且熱黏著性合 -10- 1324195 ^ ：\ 成纖維與紙漿纖維被熱黏著。此內層之單位面積重量以8 〜24 0 g/ m2爲理想。在小於8 g/ m2時紙漿的量過少致 吸水性不充分，另一方面’大於240 g/m2時整體呈現板 狀而不適於本用途。 而且’作爲不織布整體，表背面的表層部與內層部之 間亦以熱黏著性合成纖維彼此間形成一體化。更且，有充 分的熱封性。 如此的不織布，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，但是以不織布的長邊方向 、寬幅方向及厚方向隨機三次元配向所以理想。 於此’依氣流噴吹的不織布爲如以下方式可得。 以所定量被解纖的熱黏著性合成纖維作爲主體的纖維 在空氣氣流中均一分散及搬運，由設置於吐出部有細孔的 隔屏吹出該纖維’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’使上述纖維堆積在網上。黏著， 使熱黏著性合成纖維與紙漿纖維的混合物同樣，堆積於上 述堆積層上。更且，使熱黏著性合成纖維爲主體的纖維在 該等層上堆積。 接著’此熱黏著性合成纖維充分發揮其黏著效果之溫 度加熱處理整體’可得本發明之乾式紙漿不織布。在充分 發揮黏著效果時’需要比熱黏著性合成纖維之黏著成分之 融點高15〜40 °C之溫度下加熱處理。 如此’以氣流噴吹法製造的不織布，能向不織布的流 -11 - 1324195 •韓—Lt.’ - -； 動方向、寬幅方向及厚方向使纖維以隨機3次元配向。於 · 是，因爲此等爲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 _ 〇 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，長度和寬度的強度之比値爲乾燥時 及濕潤時皆爲0.8〜1 .2，理想爲必需是0.85〜1.2。若低 於任一方的強度則易產生實用上的妨礙。 φ 而且，在乾燥時及濕潤時強度的比値爲0.6〜1.1，理 想爲必需是〇 . 7〜1 . 1。小於0.6時比在乾燥時使得濕潤時 的強度大幅降低，即一旦濡濕時即變弱的不織布，遠離了 本發明的意圖，產生實用上的問題。而且，在濕潤時依水 分的存在使纖維間的表面張力而強度上昇，大於1的場合 ，這也在本發明的範圍內時，而只要某些以水分的存在而 結合別的手段不存在時，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 擊 類等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。在小於8g/g時，在實用 上擦拭性、水分保持性不足，有實用上的問題。另一方面 ，對大於20g/ g時，不織布本身保持水分量過多，有操 ‘ 作使用上的問題。 _ 不織布全體的單位面積重量以20〜250 g/m2爲理想 ，按照用途，可選擇適合的單位面積重量。 本發明的不織布只要不損及本發明的意圖，也可以與 -12- 1324195 …-- j 其他的層形成一體化。例如與通氣性層一體化，在製作本 發明的不織布時，通氣性層先置於金屬網上，在其上逐漸 堆積纖維，可容易複合層化。 而且，作爲一體化層，可舉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、裂膜絲織物、粗眼編織物、薄細布等，以熱黏著性材 料構成層爲理想，且通氣性大者爲理想。 本發明爲使包含熱黏著性合成纖維之表背面的表層部 之單位面積重量適當化，而且增加內層之熱黏著性合成纖 維的量，藉以抑制纖維的脫落、不損及吸水性，不織布的 強度在濕潤時使用枣反覆使用上能提高其耐用度。而且水 和油的擦拭性也佳，無層間剝離，可獲得在擦拭用途上非 常適合的不織布。而且，本發明的不織布具有充分的熱封 性。而且’生理用品、尿布等的衛生材料和在醫學的用途 同樣合適。 而且’本發明的不織布無需擔心因化學黏著劑樹脂的 殘留聚合物，極爲衛生。 更且’不織布的製造步驟不會排水，排氣中亦無化學 黏著劑的單體，環境負荷小。 實施例 雖舉本發明的實施例說明，但是本發明不限於此等之 實施例。 -13-In addition to the above-mentioned heat-adhesive synthetic fibers, the surface layer includes recycled fibers such as yttrium, semi-synthetic fibers such as acetate, synthetic fibers such as polyester, polypropylene, polyacrylamide, and vinylon, and paper, cotton. , hemp, etc. Days of fiber can also be used for other fibers. At this time, the ratio of the heat-adhesive synthetic fiber of the surface layer is preferably 70 to 100% by weight, more preferably 85 to 1% by weight. When the amount is less than 70% by weight, the possibility that the other fibers are detached is increased. In addition, not only the detachment effect of the inner layer pulp is lowered, but also the wet strength is lowered, which causes a practical problem. φ heat adheres to the fibers forming the surface layer, and the pulp is fixed by the mesh structure between the fibers. The weight per unit area must exceed 5 g/m2 and below 12 g/m2. When it is 5 g/m2 or less, since the amount of the water-resistant synthetic fiber and the number of bonding points between the fibers are small, it is not possible to ensure sufficient wet strength for wiping resistance, and it is easy to cause an increase in the detached fiber. Unlike applications that emphasize the absorption of sanitary materials, the fibers are liable to fall off when used for wiping, and such non-woven fabrics are not practical for use in such applications as wipes and kitchen towels. On the other hand, when it exceeds 12 g/m2, the heat-adhesive layer having water resistance tends to become thicker in spring, and the absorption of moisture into the inner layer becomes insufficient, and the visual sense of the touch becomes hard, and the practicality is still lacking. . When the weight per unit area becomes large, the strength becomes large but the water absorbability is lowered. However, if it is within the scope of the present invention, it is possible to obtain a non-woven fabric which has sufficient strength and is wet, and which does not fall off and has a soft touch. Moreover, because the amount of synthetic fibers is large, the absorption of oil is also good, and since it is easy to be incorporated with oil, there is also a point of easy decontamination. The inner layer is made of heat-adhesive to make heat-adhesive synthetic fibers and pulp fibers. 9- 1324195. The heat-adhesive synthetic fiber can be used in the same or different form as the surface layer. As the pulp fiber, a pulverized pulp having a length of 0.2 mm to 5 mm is preferable. The ratio of the heat-adhesive synthetic fiber to the pulp fiber in the inner layer is that the ratio of the specific adhesive of the heat-adhesive synthetic fiber to the total of the adhesive synthetic fiber and the pulp fiber is less than 20% by weight, and the shedding fiber is increased and strength. In particular, the strength is reduced when wet. Thus, for example, a sanitary article can be used for the purpose of attaching importance to water absorption and flexibility even if it has no strength, but it cannot be used as a non-woven fabric for wiping which has the object of the present invention. On the other hand, for more than 60% by weight, the amount of pulp fibers imparting absorbency is reduced, not only the wiping property and the absorptivity are insufficient, but also the visual perception of the touch is hard and the practicality is insufficient. The ratio of the heat-adhesive synthetic fiber becomes large and the strength becomes large but the water absorption is lowered. Therefore, sufficient strength, particularly strength at the time of wetting, and water absorption are difficult to coexist. For the use of wipes and Weifang paper towels, the coexistence of these is very important. In the comparative range of the present invention, sufficient water absorbability is first maintained, and a nonwoven fabric of sufficient strength can be obtained even when wet. Further, the amount of detached fibers is also small, and such a non-woven fabric can be washed and wrung to have a sufficient degree of strength even if it is dirty, and can be used repeatedly several times. Further, since the ratio of the heat-synthesized fiber is large, since the volume is small and thin, the usability is good and the space is also effective. In the inner layer, the thermally adhesive synthetic fibers are "and thermally bonded" to each other. -10- 1324195 ^ :\ The fibers and the pulp fibers are thermally bonded. The inner layer has a basis weight of 8 to 24 0 g/m2. When the amount is less than 8 g/m2, the amount of pulp is too small to cause insufficient water absorption, and on the other hand, when it is larger than 240 g/m2, it is generally in the form of a plate and is not suitable for the purpose. Further, as the nonwoven fabric as a whole, the heat-adhesive synthetic fibers are integrated with each other between the surface layer portion and the inner layer portion of the front and back surfaces. Moreover, there is sufficient heat sealing. Such a non-woven fabric, if it is a dry non-woven fabric, can be manufactured by any method. The non-woven fabric produced by the air jet method is a fiber which forms a non-woven fabric, but is preferably three-dimensionally aligned in the longitudinal direction, the wide direction, and the thick direction of the non-woven fabric. Here, the non-woven fabric blown by the air current is obtained as follows. The fiber mainly composed of the defibrated heat-adhesive synthetic fiber is uniformly dispersed and transported in an air flow, and the fiber is blown out from a screen provided with pores in the discharge portion, and the metal or plastic net is placed on the lower portion. On the one hand, air is extracted from the lower part of the net to make the fibers accumulate on the net. Adhesively, the heat-adhesive synthetic fiber is deposited on the above-mentioned accumulation layer in the same manner as the mixture of the pulp fibers. Further, fibers mainly composed of the heat-adhesive synthetic fibers are deposited on the layers. Then, the heat-adhesive synthetic fiber is subjected to a temperature-heating treatment to fully exert its adhesive effect, and the dry pulp non-woven fabric of the present invention can be obtained. When the adhesive effect is sufficiently exerted, it is required to heat at a temperature 15 to 40 ° C higher than the melting point of the adhesive component of the heat-adhesive synthetic fiber. Such a non-woven fabric manufactured by the air jet method can align the fibers in a random 3 dimensional direction to the non-woven flow -11 - 1324195 • Han-Lt.' - -; in the moving direction, the wide direction, and the thick direction. Yes, because these are heat-adhesives that do not cause interlayer peeling. Moreover, the non-woven fabrics produced by the airflow blowing method have good uniformity and poor performance. _ If necessary, roller calendering can be performed. And embossing. In the non-woven fabric of the present invention, the ratio of the strength of the length to the width is 0.8 to 1.2 when dry and wet, and desirably 0.85 to 1.2. If it is lower than the strength of either side, it is easy to cause practical trouble. φ Moreover, the ratio of the strength during drying and wetting is 0.6 to 1.1, and it is desirable to be 〇. 7~1. When it is less than 0.6, the strength at the time of wetting is drastically lowered, i.e., the nonwoven fabric which becomes weak once wet, away from the intention of the present invention, causes practical problems. Further, when wet, the strength of the surface tension between the fibers increases depending on the presence of moisture, and when it is more than 1, this is also within the scope of the present invention, and as long as some of the means other than the presence of moisture does not exist, , usually does not exceed 1.1. Applicable to the non-woven fabric of the present invention, such as a wipe, a kitchen towel, a sanitary napkin, etc., it is required to have appropriate water absorbability, and the water absorbability is 8 to 20 g/g, preferably 10 to 18 g/g. When it is less than 8 g/g, practical wiping property and moisture retaining property are insufficient, and there are practical problems. On the other hand, when it is more than 20 g/g, the non-woven fabric itself maintains a large amount of water, and there is a problem in operation. _ The weight per unit area of the non-woven fabric is preferably 20 to 250 g/m2, and the unit weight can be selected according to the application. The nonwoven fabric of the present invention may be integrated with other layers of -12- 1324195 ...--j as long as the intention of the present invention is not impaired. For example, when it is integrated with the air permeable layer, when the nonwoven fabric of the present invention is produced, the air permeable layer is first placed on the metal mesh, and the fibers are gradually deposited thereon, so that the composite layer can be easily laminated. Further, as the integrated layer, for example, a dry non-woven fabric such as a wet non-woven fabric, a paper, a spunbonded fabric, a melt-blown fabric 'plastic net', a perforated film, a split-filament fabric, a coarse-knit fabric, and a thin cloth can be mentioned. It is ideal for forming a layer with a heat-adhesive material, and it is desirable for a large air permeability. The present invention is intended to reduce the basis weight of the surface layer portion including the front and back surfaces of the heat-adhesive synthetic fiber, and to increase the amount of the heat-adhesive synthetic fiber of the inner layer, thereby suppressing the fall-off of the fiber, damage and water absorption, and non-woven fabric. When the strength is wet, the use of the jujube can increase the durability. Moreover, the wiping property of water and oil is also good, and there is no interlayer peeling, and a non-woven fabric which is very suitable for wiping use can be obtained. Moreover, the nonwoven fabric of the present invention has sufficient heat sealability. Moreover, sanitary materials such as physiological products, diapers, and the like are equally suitable for medical use. Further, the nonwoven fabric of the present invention is not particularly concerned with the residual polymer of the chemical adhesive resin and is extremely hygienic. Furthermore, the manufacturing process of the non-woven fabric does not drain, and there is no chemical adhesive in the exhaust gas, and the environmental load is small. EXAMPLES Although the examples of the invention are illustrated, the invention is not limited to the examples. -13-
1324195 實施例1 表表面的表層部之熱黏著性会 烯對苯二甲酸酯、鞘爲聚乙烯的 FIBER株式會社製· F6。2.2dt、 使用芯爲聚丙烯、鞘爲共聚合 CHISSO POLYPRO纖維株式會社 5mm)和紙浆（Weyerhaeuser 公百 以30重量百分率' 70重量百分率 吹法145 °C加熱溫度製造不織布。 表表背面層部之單位面積重量 位面積重量爲33 g/m2。厚度爲〇 長度、寬度的強度，其比値、 値、吸水性等的物性表示於表1 而且，強度、吸水性以以下的 (1)強度.：依 JIS L-1913 25mm，夾取間隔爲l〇〇mm。 (2 )吸水性：由預先測重的 片浸漬在20 °C的水中一分鐘，在伯 置一分鐘之後再度測定重量，依下 ① 單位面積的吸水性（g/ 試驗片的面積，以g/m2表示。 ② 單位本身重的吸水性（纟 試驗片的重量，以g/g表示。 Γ成纖維是使用芯爲聚乙 芯鞘型複合纖維（帝人 長度5mm) ’內層部是 聚乙烯之複合纖維（ • INTAC。1 .7dt，長度 製.NB4 1 6Kraft )分別 之比例混合，以氣流噴 爲6 g/ m2、內層之單 .54mm。 其乾燥時與濕潤時之比 方法測定。 。但是試驗片的寬幅爲 1 0 0 m m X 1 0 0 m m 的試驗 ΐ斜45度的玻璃板上放 式算出吸水性。 ):已吸水的水重除以 ):已吸水的水重除以 1324195 .· . *>' —. ι02δ …' i ΐ 干 3 ——，.*—-、-〜<><_ _ _ ^ 實施例2 表背面的表層部的黏著性複合纖維與紙漿的比値爲 90/10，單位面積重量爲8 g/m2，內層部之黏著性複合 纖維與紙漿的比値爲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0.68mm。 實施例3 表背面的表層部的單位面積重量爲10 g/m2，內層 部之黏著性複合纖維與紙漿的比値爲40/ 60，單位面積 重量爲100 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 表背面的表層部的單位面積重量爲4g/m2，內層部 之黏著性複合纖維與紙漿的比値爲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 表背面的表層部的單位面積重量爲16 g/m2，內層 部之黏著性複合纖維與紙漿的比値爲70/30，單位面積 重量爲23 g/m2其他全部與實施例1相同，以氣流噴吹 法製造不織布。 -15- 1324195 比較例3 僅以單位面積重量爲58 g/ m2的紙漿製作氣流噴吹 不織布，聚丙烯酸酯樹脂的乳狀液，以固形量成爲8 g/ m2地賦予浸漬，以熱風溫度13 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如表1所 131324195 Example 1 Thermal adhesion of the surface layer of the surface of the surface of the surface of the surface of the ethylene terephthalate, and the sheath of the polyethylene was made by FIBER Co., Ltd. F6. 2.2 dt, the core was polypropylene, and the sheath was a copolymerized CHISSO POLYPRO fiber. 5mm) and pulp (Weyerhaeuser 100% by weight '70% by weight blowing method 145 °C heating temperature to make non-woven fabric. The surface area of the back surface of the table weight weight area is 33 g / m2. Thickness is 〇 length The strength of the width, the physical properties such as 値, 値, water absorption, etc. are shown in Table 1. Moreover, the strength and water absorption are as follows: (1) Strength: According to JIS L-1913 25mm, the gripping interval is l〇〇mm (2) Water absorption: The pre-weighted piece is immersed in water at 20 ° C for one minute, and the weight is measured again after one minute of standing, and the water absorption of 1 unit area is used (g/the area of the test piece to g/m2 is expressed. 2 The weight of the unit itself is heavy (the weight of the test piece is expressed in g/g. The fiber is a core-sheath type composite fiber (the length of the Teijin is 5 mm). Ethylene composite fiber ( • INTAC 1 .7dt, length system. NB4 1 6Kraft ) The ratio of the mixture is 6 g / m 2 in airflow and 54 mm in inner layer. The ratio of drying to wetness is measured. However, the width of the test piece is wide. The water absorption was calculated on a glass plate with a skew of 45 degrees for a test of 100 mm X 1 0 0 mm.): Water that has been absorbed by water is divided by: The water that has been absorbed is divided by 1324195 .· . *> ;' —. ι02δ ...' i ΐ dry 3 ——,.*—-, —〜<><_ _ _ ^ Example 2 The ratio of the adhesive composite fiber to the surface of the back side of the back of the table is 90/10, the weight per unit area is 8 g/m2, the ratio of the adhesive composite fiber to the pulp in the inner layer is 25/75, and the weight per unit area is 49 g/m2. All the same as in the first embodiment, the air flow is sprayed. The nonwoven fabric was produced by a blow method. The thickness was 0.68 mm. Example 3 The surface area of the back surface of the watch has a basis weight of 10 g/m2, and the ratio of the adhesive composite fiber of the inner layer to the pulp is 40/60, and the basis weight is The other 100 g/m2 was the same as in Example 1, and the nonwoven fabric was produced by a gas jet method. Comparative Example 1 The surface area of the surface portion of the back surface of the watch was heavy. 4 g/m2, the ratio of the adhesive conjugate fiber of the inner layer to the pulp was 8/92, and the basis weight was 52 g/m2. All of the same as in Example 1, the nonwoven fabric was produced by a gas jet method. The surface area of the back surface of the watch has a basis weight of 16 g/m 2 , the ratio of the adhesive conjugate fiber of the inner layer to the pulp is 70/30, and the basis weight is 23 g/m 2 , and all the same as in the first embodiment, Non-woven fabric is produced by air jet blowing. -15- 1324195 Comparative Example 3 A non-woven fabric was sprayed on a pulp having a basis weight of 58 g/m2, and an emulsion of a polyacrylate resin was impregnated at a solid content of 8 g/m2 to a hot air temperature of 13 It was dried at 0 ° C, and a non-woven fabric was sprayed as a resin type air flow. The physical properties of the non-woven fabric obtained in the above examples and comparative examples are shown in Table 1.
〔表1〕〔Table 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 組成 PET/PE複合纖 維(2.2dtx5mm) 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% 單位面積重 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 比値 (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 比値 (寬度/長度) 1.02 0.95 0.99 0.83 1.01 0.81 乾濕強力比値 (長度） 濕墘 0.80 0.85 0.90 0.45 0.99 0.39 吸水性 g/m2 538 790 1080 960 385 882 s/g 12.0 12.2 9.0 16 7 14 -17- 1324195 Λ χ . 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 使用在濡濕地板用、廚房用、汽車用等之對物擦拭物和清 掃調理器具、擦浄食材、吸收滴落物用等廚房紙巾，和臉 、手、身體等對人擦拭物等。更且，亦同樣適合於生理用 品、尿布等的衛生材料和在醫學的用途。Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Table composition PET/PE composite fiber (2.2 dtx5 mm) 100% 90% 100% 100% 100% propylene resin 8 g/m2, pulp 55 g /m2 Pulp. 10% • - Weight per unit area g/m2 6 8 10 4 16 Inner layer PP/PE composite fiber (1.7dtx5mm) 30% 25% 40% 8% 70% Pulp 70% 75% 60% 92% 30% Unit weight g/m2 33 49 100 52 32 Non-woven fabric 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 Dry and wet strength ratio 长度 (length) Wet 墘 0.80 0.85 0.90 0.45 0.99 0.39 Water absorption g/m2 538 790 1080 960 385 882 s/g 12.0 12.2 9.0 16 7 14 -17- 1324195 Λ χ . INDUSTRIAL APPLICABILITY The dry pulp of the integrated layer structure of the present invention Weaving cloth, suitable for kitchen wipes such as wet wipes, kitchens, automobiles, etc., wipes and cleaning utensils, wiping foods, absorbing dripping, etc., and face, hand, body, etc. Wait. Furthermore, it is also suitable for sanitary materials such as physiological products, diapers, and the like for medical use.
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