JP2023150158A - Nonwoven fabric wiper - Google Patents

Nonwoven fabric wiper Download PDF

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JP2023150158A
JP2023150158A JP2022059111A JP2022059111A JP2023150158A JP 2023150158 A JP2023150158 A JP 2023150158A JP 2022059111 A JP2022059111 A JP 2022059111A JP 2022059111 A JP2022059111 A JP 2022059111A JP 2023150158 A JP2023150158 A JP 2023150158A
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nonwoven fabric
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wiper
fiber
fibers
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生弥 林
Ikuya Hahashi
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Nippon Paper Crecia Co Ltd
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Nippon Paper Crecia Co Ltd
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Abstract

To provide a nonwoven fabric wiper that achieves excellent liquid adsorptivity and high surface strength at low cost by setting the basis weight at a low level.SOLUTION: A nonwoven fabric wiper contains cellulosic fiber, synthetic fiber, and heat-fusing fiber. Content of the synthetic fiber is 1 wt.% or more and 50 wt.% or less of the total amount of the nonwoven fabric wiper, and content of the heat-fusing fiber is 10 wt % or more and 30 wt.% or less of the total amount of the nonwoven fabric wiper. The nonwoven fabric wiper has a basis weight of 25 g/m2 or more and 35 g/m2 or less, a thickness of 0.25 mm/1 ply or more, a density of 0.080 g/cm3 or more and 0.130 g/cm3 or less, and a dry taber measurement value of 5 times or more.SELECTED DRAWING: None

Description

本発明は、不織布ワイパーに関する。 The present invention relates to a nonwoven wiper.

従来から不織布で作られたワイパーがクリーンエリア等低発塵性を必要とする環境で使用されている。これまでは半導体産業等、限定的な工業分野でのみ製造環境のクリーン化が行われていたが、近年では、化粧品や医療品、食品等、様々な工業分野でクリーン環境の導入が行われ、不織布ワイパーの需要が高まっている。様々な拭き取り環境に対応して、例えば、セルロース系繊維(木材パルプ、ビスコースレーヨンやリヨセル等)と合成繊維(PET、PP、PE等)の短繊維とを用い、湿式法又はスパンレース法により工業用不織布ワイパーが製造されている。 Wipers made of nonwoven fabric have traditionally been used in environments that require low dust generation, such as clean areas. Up until now, clean manufacturing environments had only been implemented in limited industrial fields such as the semiconductor industry, but in recent years, clean environments have been introduced in various industrial fields such as cosmetics, medical products, and food. Demand for non-woven wipers is increasing. In response to various wiping environments, for example, cellulose fibers (wood pulp, viscose rayon, lyocell, etc.) and short fibers of synthetic fibers (PET, PP, PE, etc.) are used, and wet method or spunlace method is used. Industrial non-woven wipers are manufactured.

特許文献1には、木質パルプ、熱融着性繊維、レーヨン繊維、ビニロンバインダー繊維及び紙力増強剤を湿式抄造し、抄造物の坪量が10g/m以上30g/m以下であり、繊維分として木質パルプ50~85重量%、レーヨン繊維10~50重量%、熱融着性繊維1~3重量%の割合で含有し、かつこれらの繊維分100重量%に対してビニロンバインダー繊維を1~15重量%含む湿式不織布製ワイパー用基布が記載されている。 Patent Document 1 discloses that wood pulp, heat-fusible fibers, rayon fibers, vinylon binder fibers, and paper strength enhancers are wet-formed, and the basis weight of the paper product is 10 g/m 2 or more and 30 g/m 2 or less, The fiber content is 50 to 85% by weight of wood pulp, 10 to 50% by weight of rayon fiber, and 1 to 3% by weight of heat-fusible fiber, and vinylon binder fiber is added to 100% by weight of these fibers. A wiper base fabric made of a wet-laid nonwoven fabric containing 1 to 15% by weight is described.

特許第3798372号公報Patent No. 3798372

化粧品や食品等の製造において、不織布ワイパーに更に吸液性を向上させるため、厚みを高くすることが一般的に行われるが、吸液性は向上する反面で、表面摩耗強度が低下して、油など粘度が高いものへの拭き取りを行ったとき、十分な強度を得ることができない。また、親水性であるセルロース系繊維の量を増やす方法については、製造コストが増加するなどの課題がある。 In the production of cosmetics, food, etc., it is common practice to increase the thickness of nonwoven wipers to further improve their liquid absorption properties, but while this improves their liquid absorption properties, their surface abrasion strength decreases. When wiping off highly viscous materials such as oil, sufficient strength cannot be obtained. Furthermore, methods for increasing the amount of hydrophilic cellulose fibers have problems such as increased manufacturing costs.

本発明の目的は、目付を低く設定することで、低コストであり、優れた吸液性と高い表面強度とを両立した不織布ワイパーを提供することである。 An object of the present invention is to provide a nonwoven fabric wiper that is low in cost and has both excellent liquid absorbency and high surface strength by setting a low basis weight.

本発明者らは上記課題を解決するために鋭意研究を重ねた結果、目付を低く設定しつつ、合成繊維及び熱融着繊維の各配合比率(含有量)並びに不織布ワイパーの密度を調整することで、所望の不織布ワイパーが低コストで得られることを見出し、本発明を完成するに至った。すなわち、本発明は下記の不織布ワイパーに係る。 The inventors of the present invention have conducted extensive research to solve the above problems, and found that while setting the basis weight low, the blending ratio (content) of synthetic fibers and heat-fused fibers and the density of the nonwoven wiper were adjusted. The inventors discovered that a desired nonwoven wiper can be obtained at low cost, and completed the present invention. That is, the present invention relates to the following nonwoven fabric wiper.

(1)セルロース系繊維、合成繊維、及び熱融着繊維を含む不織布ワイパーであって、
前記合成繊維の含有量が前記不織布ワイパー全量の3重量%以上50重量%以下であり、かつ前記熱融着繊維の含有量が前記不織布ワイパー全量の10重量%以上30重量%以下であり、
目付が25g/m以上35g/m以下、厚みが0.25mm/1ply以上、密度が0.080g/cm以上0.130g/cm以下、ドライテーバー測定値が5回以上である、不織布ワイパー。
(2)湿潤相対引張強度(GMT)が5.5N/25mm以上20.0N/25mm以下である、上記(1)の不織布ワイパー。
(3)吸水速度が20秒以下、吸油速度が260秒以下、T.W.A.が170g/m以上、T.O.A.が170g/m以上である、上記(1)又は(2)の不織布ワイパー。
(4)前記合成繊維が熱可塑性樹脂繊維であり、前記熱融着繊維が、芯鞘型複合繊維である、上記(1)乃至(3)のいずれかの不織布ワイパー。
(1) A nonwoven wiper containing cellulose fibers, synthetic fibers, and heat-fused fibers,
The content of the synthetic fiber is 3% by weight or more and 50% by weight or less of the total amount of the nonwoven fabric wiper, and the content of the heat-fusion fiber is 10% by weight or more and 30% by weight or less of the total amount of the nonwoven fabric wiper,
The basis weight is 25 g/m 2 or more and 35 g/m 2 or less, the thickness is 0.25 mm/1 ply or more, the density is 0.080 g/cm 3 or more and 0.130 g/cm 3 or less, and the dry taber measurement value is 5 or more times. Non-woven wiper.
(2) The nonwoven fabric wiper according to (1) above, having a wet relative tensile strength (GMT) of 5.5 N/25 mm or more and 20.0 N/25 mm or less.
(3) Water absorption speed is 20 seconds or less, oil absorption speed is 260 seconds or less, T. W. A. is 170g/ m2 or more, T. O. A. The nonwoven fabric wiper according to (1) or (2) above, wherein the nonwoven fabric wiper has a weight of 170 g/m 2 or more.
(4) The nonwoven fabric wiper according to any one of (1) to (3) above, wherein the synthetic fiber is a thermoplastic resin fiber, and the heat-fusion fiber is a core-sheath composite fiber.

本発明によれば、目付を低く設定することで、低コストであり、優れた吸液性と高い表面強度とを両立した不織布ワイパーが提供される。 According to the present invention, by setting a low basis weight, a nonwoven fabric wiper that is low in cost and has both excellent liquid absorbency and high surface strength is provided.

本実施形態の不織布ワイパーの製造方法の一実施形態を模式的に示す側面図である。FIG. 1 is a side view schematically showing an embodiment of a method for manufacturing a nonwoven wiper according to the present embodiment. ドライテーバー試験後の本実施形態の不織布ワイパーの表面状態を示す写真である。It is a photograph showing the surface condition of the nonwoven fabric wiper of this embodiment after a dry Taber test.

<不織布ワイパー>
本実施形態に係る不織布ワイパーは、セルロース系繊維、合成繊維、及び熱融着繊維を含み、かつ目付が25g/m以上35g/m以下の範囲、厚みが0.25mm/1ply以上の範囲、密度が0.080g/cm以上0.130g/cm以下の範囲、及びドライテーバー測定値が5回以上のものである。このような不織布ワイパーは、良好な吸液性と表面強度とをバランス良く併せ持ち、各種工業分野において清拭用のワイパーとして好適に使用できる。
<Non-woven wiper>
The nonwoven fabric wiper according to the present embodiment contains cellulose fibers, synthetic fibers, and heat-fused fibers, has a basis weight in a range of 25 g/m 2 to 35 g/m 2 , and has a thickness in a range of 0.25 mm/1 ply or more. , the density is in the range of 0.080 g/cm 3 or more and 0.130 g/cm 3 or less, and the dry Taber measurement value is 5 or more times. Such a nonwoven fabric wiper has a well-balanced combination of good liquid absorbency and surface strength, and can be suitably used as a wiper for wiping in various industrial fields.

本実施形態によれば、強度、吸液性維持の為、目付を高くする方法を用いるのではなく、熱融着繊維を適切に配合することで、目付を維持したまま、低コストで強度、吸液性を維持することができる。より具体的には、不織布ワイパーの強度を向上させるために、合成繊維の配合比率(含有量)を高くし、合成繊維の配合比率が増えることによる吸液性の低下は、不織布の密度を低めに調整することで保持し、更に密度の低下に伴う表面強度の低下は、熱融着繊維を配合することで強度を維持した不織布ワイパーが得られる。 According to this embodiment, in order to maintain strength and liquid absorbency, instead of using a method of increasing the basis weight, by appropriately blending heat-sealable fibers, strength and absorbency can be maintained at low cost while maintaining the basis weight. Can maintain liquid absorbency. More specifically, in order to improve the strength of nonwoven fabric wipers, the blending ratio (content) of synthetic fibers is increased, and the decrease in liquid absorption due to the increased blending ratio of synthetic fibers is caused by lowering the density of the nonwoven fabric. A nonwoven fabric wiper can be obtained in which the surface strength is maintained by adjusting the surface strength, and the strength is maintained by blending heat-fusible fibers to prevent the decrease in surface strength due to the decrease in density.

<不織布ワイパーの原料>
本実施形態の不織布ワイパーは、前述のように、所定量の合成繊維、及び所定量の熱融着繊維を含み、残部がセルロース系繊維を含んで構成されている。以下、セルロース系繊維、合成繊維、及び熱融着繊維の順で各繊維を詳しく説明する。
<Raw materials for non-woven wipers>
As described above, the nonwoven fabric wiper of this embodiment includes a predetermined amount of synthetic fibers and a predetermined amount of heat-sealable fibers, and the remainder includes cellulose fibers. Each fiber will be explained in detail below in the order of cellulose fiber, synthetic fiber, and heat-fused fiber.

(セルロース系繊維)
セルロース系繊維は、例えば、本実施形態の不織布ワイパーに吸水性、吸油性等を付与する。セルロース系繊維としては、例えば、リヨセル、ビスコースレーヨン、銅アンモニアレーヨン、溶剤紡糸セルロース繊維レーヨン繊維、木綿繊維、針葉樹晒クラフトパルプ(以下「NBKP」ともいう)、広葉樹晒クラフトパルプ(以下「LBKP」ともいう)等、一般的なセルロース系繊維を用いることができる。セルロース系繊維におけるNBKPとLBKPの含有割合は、例えば、NBKP:LBKP=50:50以上100:0以下の範囲、NBKP:LBKP=70:30以上100:0以下の範囲、NBKP:LBKP=90:10以上100:0以下の範囲、又はNBKP:LBKP=100:0である。NBKPとしては、例えば、ラジアータパイン、スラッシュパイン、サザンパイン、ロッジポールパイン、スプルース及びダグラスファーからなる繊維が好ましい。なお、NBKPの代わりにNUKP、LBKPの代わりにLUKPを用いることもできる。これらの中でも、リヨセル、ビスコースレーヨン等が好ましい。セルロース系繊維は1種を単独で又は2種以上を組み合わせて使用できる。
(cellulose fiber)
The cellulose fibers, for example, impart water absorbency, oil absorbency, etc. to the nonwoven fabric wiper of this embodiment. Examples of cellulosic fibers include lyocell, viscose rayon, copper ammonia rayon, solvent-spun cellulose fiber rayon fiber, cotton fiber, softwood bleached kraft pulp (hereinafter also referred to as "NBKP"), and hardwood bleached kraft pulp (hereinafter referred to as "LBKP"). It is possible to use general cellulose fibers such as (also referred to as). The content ratio of NBKP and LBKP in the cellulose fiber is, for example, NBKP:LBKP=50:50 or more and 100:0 or less, NBKP:LBKP=70:30 or more and 100:0 or less, NBKP:LBKP=90: The range is 10 or more and 100:0 or less, or NBKP:LBKP=100:0. Preferable examples of NBKP include fibers made of radiata pine, slash pine, southern pine, lodgepole pine, spruce, and Douglas fir. Note that NUKP can be used instead of NBKP, and LUKP can be used instead of LBKP. Among these, Lyocell, viscose rayon, etc. are preferred. One type of cellulose fiber can be used alone or two or more types can be used in combination.

(熱融着繊維)
熱融着繊維を配合することで、例えば、本実施形態の不織布ワイパーの密度の低下に伴う表面強度の低下を防止し、湿潤強度を向上させ、嵩高化により吸油量を向上させる。また、嵩高化の効果もあり、これにより吸油の容量の向上に寄与する。また融着によるバインディング効果により発塵を抑えることができる。本実施形態の不織布ワイパーにおける、熱融着繊維の含有量は、本実施形態の不織布ワイパー全量の10重量%以上30重量%以下の範囲、15重量%以上25重量%以下の範囲、又は18重量%以上22重量%以下の範囲である。熱融着繊維の含有量が10重量%未満では、油の拭き取り性は比較的良好であり、ゴワゴワ感も少ないが、ドライテーバーが5回未満で耐摩耗性が低く、高粘性物や水の拭き取り性が低下する傾向がある。一方、熱融着繊維の含有量が30重量%を超えると、不織布ワイパーの耐摩耗性や高粘性物の拭き取り性、発塵性は向上するものの、水や油の拭き取り性が低下し、ゴワゴワ感が増し、全体としてバランスの良い不織布ワイパーが得られない傾向がある。
(heat-fused fiber)
By blending heat-fusible fibers, for example, the surface strength of the nonwoven wiper of this embodiment is prevented from decreasing due to a decrease in density, the wet strength is improved, and the oil absorption is improved by increasing the bulk. It also has the effect of increasing bulk, which contributes to improving oil absorption capacity. Furthermore, dust generation can be suppressed due to the binding effect caused by fusion. The content of heat-fusible fibers in the nonwoven fabric wiper of this embodiment is in the range of 10% to 30% by weight, 15% to 25% by weight, or 18% by weight of the total amount of the nonwoven fabric wiper of this embodiment. % or more and 22% by weight or less. When the content of heat-fusible fibers is less than 10% by weight, the oil wiping property is relatively good and there is little stiffness, but if the dry taber is used less than 5 times, the abrasion resistance is low, and it is difficult to wipe off highly viscous materials or water. Wipeability tends to decrease. On the other hand, if the content of the heat-fusible fiber exceeds 30% by weight, the wear resistance of the nonwoven wiper, the ability to wipe highly viscous materials, and the dust generation properties will improve, but the ability to wipe away water and oil will decrease and the wiper will become stiff. There is a tendency that a well-balanced nonwoven fabric wiper cannot be obtained as a whole.

熱融着繊維とは、融点が100℃乃至200℃の範囲にある熱可塑性樹脂繊維である。このような熱可塑性樹脂繊維としては、融点が前述の範囲にあるものを特に限定なく使用でき、例えば、ポリエチレン(PE)、ポリプロピレン(PP)等のポリオレフィン系繊維、ポリエステル等のポリエステル系繊維、ナイロン6、ナイロン66等のポリアミド系繊維、ポリアクリル酸、ポリメタクリル酸アルキルエステル等のポリアクリル系繊維等が挙げられる。また、熱融着繊維として、低融点成分及び高融点成分の2成分以上からなる複合繊維を使用できる。前述の複合繊維としては、芯鞘型の複合繊維が挙げられる。好ましく、芯が高融点PET、PPで、鞘が低融点PET、PP、PEのものが好ましい。芯鞘型の複合繊維としては、芯成分が同心芯鞘型複合繊維や、偏心芯鞘型複合繊維が挙げられる。これら複合繊維の具体例としては、特開平9-296325号公報や特許2759331号公報等に記載のものが挙げられる。さらに市販の熱融着繊維も使用でき、市販品としては、ES Chopシリーズ(チッソ(株)製)、NBFシリーズ(大和紡績(株)製)等が挙げられる。特にNBFのEタイプは、低融点(約100℃)のEVA(エチレン-酢ビ共重合体)を鞘成分としており、抄造時の乾燥工程で乾燥と同時に融着を行うことができ、操業工程が簡略化できるために好適である。これらの熱融着繊維の中でも、芯鞘型複合繊維が好ましく、PE/PET型複合繊維がより好ましい。 Thermal fusible fibers are thermoplastic resin fibers having a melting point in the range of 100°C to 200°C. As such thermoplastic resin fibers, those having a melting point within the above-mentioned range can be used without particular limitation, such as polyolefin fibers such as polyethylene (PE) and polypropylene (PP), polyester fibers such as polyester, and nylon. 6, polyamide fibers such as nylon 66, polyacrylic fibers such as polyacrylic acid, polymethacrylic acid alkyl ester, and the like. Further, as the heat-fusible fiber, a composite fiber consisting of two or more components, a low melting point component and a high melting point component, can be used. Examples of the above-mentioned composite fibers include core-sheath type composite fibers. Preferably, the core is made of high melting point PET or PP and the sheath is made of low melting point PET, PP or PE. Examples of core-sheath type conjugate fibers include concentric core-sheath type conjugate fibers and eccentric core-sheath type conjugate fibers. Specific examples of these composite fibers include those described in Japanese Patent Application Laid-Open No. 9-296325, Japanese Patent No. 2759331, and the like. Furthermore, commercially available heat-fusible fibers can also be used, and commercially available products include ES Chop series (manufactured by Chisso Corporation), NBF series (manufactured by Daiwabo Co., Ltd.), and the like. In particular, NBF E type has a low melting point (approximately 100°C) EVA (ethylene-vinyl acetate copolymer) as a sheath component, and can be fused at the same time as drying in the drying process during papermaking. This is suitable because it can simplify the process. Among these heat-fusible fibers, core-sheath type composite fibers are preferred, and PE/PET type composite fibers are more preferred.

(合成繊維)
合成繊維は、例えば、本実施形態の不織布ワイパーの強度を向上させる。合成繊維の含有量は、本実施形態の不織布ワイパー全量の3重量%以上50重量%以下の範囲、10重量%以上40重量%以下の範囲、又は20重量%以上30重量%以下の範囲である。合成樹脂が1重量%未満では、ゴワゴワ感は比較的少ないものの、耐摩耗性、高粘性物や油の拭き取り性、発塵性等が低下する傾向がある。一方、合成樹脂が50重量%を超えると、耐摩耗性、高粘性物や油の拭き取り性は向上するものの、水の拭き取り性が顕著に低下し、ゴワゴワ感がでる傾向がある。
(Synthetic fiber)
For example, the synthetic fiber improves the strength of the nonwoven wiper of this embodiment. The content of synthetic fibers is in the range of 3% to 50% by weight, 10% to 40% by weight, or 20% to 30% by weight of the total amount of the nonwoven wiper of this embodiment. . When the synthetic resin content is less than 1% by weight, the stiffness is relatively low, but the abrasion resistance, the ability to wipe off highly viscous materials and oil, the ability to generate dust, etc. tend to deteriorate. On the other hand, when the synthetic resin content exceeds 50% by weight, although the abrasion resistance and the ability to wipe off highly viscous materials and oil are improved, the ability to wipe off water is markedly reduced and there is a tendency for a stiff feeling to appear.

合成繊維とは融点が200℃以上の熱可塑性樹脂繊維である。このような熱可塑性樹脂繊維としては、例えば、ポリエチレン(PE)、ポリプロピレン(PP)等のポリオレフィン系繊維、ポリエチレンテレフタレート(PET)等のポリエステル系繊維、ナイロン6、ナイロン66等のポリアミド系繊維、ポリアクリル酸、ポリメタクリル酸アルキルエステル等のポリアクリル系繊維、ポリ塩化ビニル、ポリ塩化ビニリデン等の塩化ビニル系繊維等が挙げられる。これらの中でも、ポリエステル系繊維、ポリオレフィン系繊維等が好ましく、PP、PE、PET等がより好ましい。合成繊維は1種を単独で又は2種以上を組み合わせて使用できる。
以上のようなセルロース系繊維、熱融着性繊維、及び合成繊維の各所定量を用いて不織布を抄造することで、以下の各物性を有する不織布ワイパーを得ることができる。
Synthetic fibers are thermoplastic resin fibers with a melting point of 200°C or higher. Examples of such thermoplastic resin fibers include polyolefin fibers such as polyethylene (PE) and polypropylene (PP), polyester fibers such as polyethylene terephthalate (PET), polyamide fibers such as nylon 6 and nylon 66, and polyamide fibers such as polyethylene terephthalate (PET). Examples include polyacrylic fibers such as acrylic acid and polymethacrylic acid alkyl ester, and vinyl chloride fibers such as polyvinyl chloride and polyvinylidene chloride. Among these, polyester fibers, polyolefin fibers, etc. are preferred, and PP, PE, PET, etc. are more preferred. One kind of synthetic fiber can be used alone or two or more kinds can be used in combination.
By forming a nonwoven fabric using predetermined amounts of the cellulose fibers, heat-fusible fibers, and synthetic fibers as described above, a nonwoven fabric wiper having the following physical properties can be obtained.

<不織布ワイパーの物性>
次に、本実施形態に係る不織布ワイパーの物性について、目付、厚み、密度、ドライテーバー測定値、湿潤相対引張強度(GMT)、吸水速度、吸油速度、保水量(T.W.A.)、及び吸油量(T.O.A.)の順でさらに詳しく説明する。
<Physical properties of non-woven wiper>
Next, regarding the physical properties of the nonwoven fabric wiper according to this embodiment, the basis weight, thickness, density, dry Taber measurement value, wet relative tensile strength (GMT), water absorption rate, oil absorption rate, water retention amount (T.W.A.), and oil absorption amount (T.O.A.) will be explained in more detail in this order.

(目付)
本実施形態に係る不織布ワイパーの目付(坪量)は、25g/m以上35g/m以下の範囲、27g/m以上33g/m以下の範囲、又は28g/m以上32g/m以下の範囲である。目付が前述の範囲にあることで、強度が高くて破れ難く、柔らかでゴワゴワ感がないことから、拭き取りの際の密着性が良く、拭き取り性が良好である。目付が25g/m未満では、耐摩耗性が低下し、高粘性物や水、油の拭き取り性が低下する傾向があり、目付が35g/mを超えると、耐摩耗性や高粘性物、水、油の拭き取り性は向上するものの、ゴワゴワ感が非常に強く、発塵性が顕著に低下する傾向がある。不織布ワイパーの目付は、JIS P 8124に準拠して測定される。
(Weight)
The basis weight (basis weight) of the nonwoven fabric wiper according to this embodiment is in the range of 25 g/m 2 or more and 35 g/m 2 or less, 27 g/m 2 or more and 33 g/m 2 or less, or 28 g/m 2 or more and 32 g/m 2 or less. It is in the range of 2 or less. When the basis weight is within the above-mentioned range, it has high strength, is hard to tear, is soft and does not have a stiff feeling, and has good adhesion and good wiping properties. If the basis weight is less than 25 g/ m2 , abrasion resistance tends to decrease, and the ability to wipe off high viscosity materials, water, and oil tends to decrease.If the basis weight exceeds 35 g/ m2 , wear resistance and high viscosity materials Although the wiping properties of water and oil are improved, the feeling of stiffness is very strong and the dust generation tends to be significantly reduced. The basis weight of the nonwoven wiper is measured in accordance with JIS P 8124.

(厚み)
本実施形態に係る不織布ワイパーの厚みは、0.25mm/1ply以上の範囲、0.26mm/1ply以上0.40mm/1ply以下の範囲、又は0.28mm/1ply以上0.32mm/1ply以下の範囲である。厚みを前述の範囲に調整することで、例えば、高い強度とゴワゴワ感の低さとを両立しつつ、拭き取り性を向上させることができる。厚みが0.25mm/1ply未満では、厚みが低くなるため、水や油の抜き取り性が低下する傾向があり、更に粘性の高いものを拭き取りづらくなる傾向がある。厚みは、シックネスゲージ(尾崎製作所製、ダイヤルシックネスゲージ「PEACOCK」)を用いて測定される。
(thickness)
The thickness of the nonwoven fabric wiper according to the present embodiment is in the range of 0.25 mm/1 ply or more, 0.26 mm/1 ply or more and 0.40 mm/1 ply, or 0.28 mm/1 ply or more and 0.32 mm/1 ply or less. It is. By adjusting the thickness within the above-mentioned range, for example, it is possible to achieve both high strength and low stiffness while improving wiping performance. If the thickness is less than 0.25 mm/1 ply, the thickness tends to be low, so the ability to remove water and oil tends to decrease, and it also tends to become difficult to wipe off highly viscous substances. The thickness is measured using a thickness gauge (manufactured by Ozaki Seisakusho, dial thickness gauge "PEACOCK").

(密度)
本実施形態に係る不織布ワイパーの密度は、0.080g/cm以上0.130g/cm以下の範囲、0.090g/cm以上0.120g/cm以下の範囲、又は0.100g/cm以上0.110g/cm以下の範囲である。密度が前述の範囲にあることで、不織布ワイパーの拭き取り性が向上し、特に水、油に対する拭き取り性が顕著に向上する。密度が0.080g/cm未満では、耐摩耗性や、高粘性物、油等の拭き取り性、発塵性等が低下する傾向があり、密度が0.130g/cmを超えると、水、油等の拭き取り性が低下する傾向がある。密度は目付と厚みから算出される。
(density)
The density of the nonwoven fabric wiper according to the present embodiment is in the range of 0.080 g/cm 3 or more and 0.130 g/cm 3 or less, 0.090 g/cm 3 or more and 0.120 g/cm 3 or less, or 0.100 g/cm 3 or less. The range is 0.110 g/cm 3 or more and 0.110 g/cm 3 or less. When the density is within the above range, the wiping performance of the nonwoven wiper is improved, and in particular, the wiping performance for water and oil is significantly improved. If the density is less than 0.080 g/cm 3 , abrasion resistance, wiping off of highly viscous materials, oil, etc., dust generation properties, etc. tend to deteriorate, while if the density exceeds 0.130 g/cm 3 , water tends to deteriorate. , the ability to wipe off oil, etc. tends to decrease. Density is calculated from the basis weight and thickness.

(ドライテーバー測定値)
本実施形態に係る不織布ワイパーのドライテーバー測定値が5回以上の範囲、5回以上15回以下の範囲、又は5回以上12回以下の範囲である。ドライテーバー測定値が前述の範囲にあることで、不織布ワイパーの耐摩耗性や、高粘性物、水、油等の拭き取り性が
向上する。ドライテーバー測定値が5回未満では、耐摩耗性や、高粘性物、水等の拭き取り性等が低下する傾向がある。また、ドライテーバー測定値が15回以上になると、ゴワゴワ感が強まり、ワイパーの使用感が低下する傾向がある。
(Dry Taber measurement value)
The dry taber measurement value of the nonwoven fabric wiper according to the present embodiment is in a range of 5 times or more, a range of 5 times or more and 15 times or less, or a range of 5 times or more and 12 times or less. When the Dry Taber measurement value is within the above range, the wear resistance of the nonwoven wiper and the ability to wipe off highly viscous materials, water, oil, etc. are improved. If the Dry Taber measurement value is less than 5 times, the abrasion resistance and the ability to wipe off highly viscous materials, water, etc. tend to deteriorate. Furthermore, when the dry taber measurement value is 15 times or more, the stiffness tends to become stronger and the usability of the wiper tends to deteriorate.

好ましい実施形態では、本実施形態の不織布ワイパーは、湿潤相対引張強度(GMT)が5.5N/25mm以上20.0N/25mm以下の範囲、6.0N/25mm以上15.0N/25mm以下の範囲、又は8.0N/25mm以上13.0N/25mm以下の範囲である。湿潤相対引張強度(GMT)を前述の範囲とすることで、本実施形態の不織布ワイパーは、優れた耐摩耗性や拭き取り性と、柔らかさと、低い発塵性と、をバランス良く併せ持つものとなる。湿潤相対引張強度(GMT)が5.5N/25mm未満では、不織布ワイパーの耐摩耗性、高粘性物や油の拭き取り性が低下する傾向にあり、湿潤相対引張強度(GMT)が20.0N/25mmを超えると、不織布ワイパーにゴワゴワ感が強く現れ、発塵性が顕著に低下する傾向がある。湿潤相対引張強度(GMT)は、JIS P8113に基づいて測定される。 In a preferred embodiment, the nonwoven fabric wiper of this embodiment has a wet relative tensile strength (GMT) in a range of 5.5 N/25 mm or more and 20.0 N/25 mm or less, and in a range of 6.0 N/25 mm or more and 15.0 N/25 mm or less. , or in a range of 8.0 N/25 mm or more and 13.0 N/25 mm or less. By setting the wet relative tensile strength (GMT) within the above range, the nonwoven fabric wiper of this embodiment has a well-balanced combination of excellent abrasion resistance and wiping properties, softness, and low dust generation. . When the wet relative tensile strength (GMT) is less than 5.5 N/25 mm, the abrasion resistance of the nonwoven wiper and the ability to wipe off highly viscous materials and oil tend to decrease, and when the wet relative tensile strength (GMT) is less than 20.0 N/25 mm, When it exceeds 25 mm, the nonwoven fabric wiper tends to have a strong stiff feeling and the dust generation property tends to decrease significantly. Wet relative tensile strength (GMT) is measured based on JIS P8113.

(吸水速度)
好ましい実施形態では、本実施形態の不織布ワイパーは、吸水速度が20秒以下の範囲、又は8秒以下の範囲である。吸水速度が前述の範囲にあることで、各種工業分野において、特に水や油の拭き取り性が向上し、清拭性の高い不織布ワイパーとなる。吸水速度が20秒を超えると、耐摩耗性や、水、油等の拭き取り性が低下する傾向がある。吸水速度はJIS L 1907に規定された吸水速度試験に基づいて測定される。
(Water absorption rate)
In a preferred embodiment, the nonwoven fabric wiper of this embodiment has a water absorption rate of 20 seconds or less, or 8 seconds or less. When the water absorption rate is within the above range, the nonwoven fabric wiper can be used in various industrial fields, particularly in wiping off water and oil, and has high wiping performance. When the water absorption rate exceeds 20 seconds, the abrasion resistance and the ability to wipe off water, oil, etc. tend to deteriorate. The water absorption rate is measured based on the water absorption rate test specified in JIS L 1907.

(吸油速度)
好ましい実施形態では、本実施形態の不織布ワイパーは、吸油速度が260秒以下の範囲、又は200秒以下である。吸油速度が前述の範囲にあることで、各種工業分野において、特に水や油の拭き取り性が向上し、清拭性の高い不織布ワイパーとなる。吸油速度が260秒を超えると、水、油等の拭き取り性が低下する傾向がある。吸油速度は、JIS L 1907に規定された吸水速度試験において、水に代えて油を用いて測定する。
(Oil absorption speed)
In a preferred embodiment, the nonwoven fabric wiper of this embodiment has an oil absorption rate of 260 seconds or less, or 200 seconds or less. When the oil absorption rate is within the above range, the nonwoven fabric wiper can be used in various industrial fields, particularly in wiping off water and oil, and has high wiping performance. When the oil absorption speed exceeds 260 seconds, the ability to wipe off water, oil, etc. tends to decrease. The oil absorption rate is measured using oil instead of water in the water absorption rate test specified in JIS L 1907.

(保水量(T.W.A.))
好ましい実施形態では、本実施形態の不織布ワイパーは、保水量(T.W.A.)が170g/m以上の範囲、又は200g/m以上の範囲である。保水量を前述の範囲とすることで、各種工業分野において、特に水や油の拭き取り性が向上し、清拭性の高い不織布ワイパーとなる。保水量が170g/m未満であると、本実施形態の不織布ワイパーの耐摩耗性又は拭き取り性が低下する傾向がある。
(Water retention amount (T.W.A.))
In a preferred embodiment, the nonwoven wiper of this embodiment has a water retention amount (T.W.A.) of 170 g/m 2 or more, or 200 g/m 2 or more. By setting the water retention amount within the above-mentioned range, the nonwoven fabric wiper can be used in various industrial fields, particularly in wiping off water and oil, and has high wiping performance. If the water retention amount is less than 170 g/m 2 , the abrasion resistance or wiping properties of the nonwoven wiper of this embodiment tend to decrease.

(吸油量(T.O.A.))
好ましい実施形態では、本実施形態の不織布ワイパーは、吸油量(T.O.A.)が170g/m以上の範囲、又は200g/m以上の範囲である。保油量を前述の範囲とすることで、各種工業分野において、特に水や油の拭き取り性が向上し、清拭性の高い不織布ワイパーとなる。保油量が170g/m未満であると、本実施形態の不織布ワイパーの耐摩耗性又は拭き取り性が低下する傾向がある。
(Oil absorption amount (T.O.A.))
In a preferred embodiment, the nonwoven wiper of this embodiment has an oil absorption (TOA) of 170 g/m 2 or more, or 200 g/m 2 or more. By setting the oil retention amount within the above-mentioned range, the nonwoven fabric wiper can be used in various industrial fields, particularly in wiping off water and oil, and has high wiping performance. If the oil retention amount is less than 170 g/m 2 , the abrasion resistance or wiping performance of the nonwoven fabric wiper of this embodiment tends to decrease.

<不織布ワイパーの製造方法>
本実施形態に係る不織布ワイパーは、従来公知のスパンレース不織布の製造方法に従って作製することができ、スパンレース不織布として得ることができる。図1に、ウェブ作製工程と、水流交絡工程と、乾燥工程と、を含むスパンレース不織布の製造方法の一実施形態を示す。
<Method for manufacturing non-woven wiper>
The nonwoven fabric wiper according to the present embodiment can be produced according to a conventionally known method for manufacturing a spunlace nonwoven fabric, and can be obtained as a spunlace nonwoven fabric. FIG. 1 shows an embodiment of a method for producing a spunlace nonwoven fabric including a web production process, a hydroentangling process, and a drying process.

ウェブ作製工程では、セルロース系繊維、合成繊維、及び熱融着繊維の各所定量をカード機10に通すことで、繊維ウェブを得る。得られた繊維ウェブは、水流交絡工程に搬送される。 In the web production process, a fibrous web is obtained by passing predetermined amounts of cellulose fibers, synthetic fibers, and heat-fusible fibers through a carding machine 10. The resulting fibrous web is conveyed to a hydroentangling process.

水流交絡工程では、繊維ウェブに対して上方のほぼ垂直な方向に配置されたウォータージェットノズル11から高圧水流を噴射し、繊維ウェブ内で各繊維を交絡させる。本実施形態ではウォータージェットノズル11は4本であるが、本実施形態に限定されず、任意の本数とすることができる。ここで、ウォータージェットノズル11の穴直径φは、例えば、0.06mm以上0.15mm以下の範囲、又は0.10mm以上0.12mm以下の範囲である。また、隣り合う2つのウォータージェットノズル11の間隔は例えば0.4mm以上1.0mm以下の範囲である。また、水流交絡処理の水圧は、繊維ウェブの坪量等に応じて設定され、例えば、1MPa以上30MPa以下の範囲である。こうして水流交絡が施され、各繊維が絡み合った繊維ウェブが得られ、この繊維ウェブは乾燥工程に搬送される。 In the hydroentangling process, a high-pressure water stream is jetted from a water jet nozzle 11 arranged above the fiber web in a direction substantially perpendicular to the fiber web to entangle each fiber within the fiber web. In this embodiment, the number of water jet nozzles 11 is four, but the number is not limited to this embodiment and can be any number. Here, the hole diameter φ of the water jet nozzle 11 is, for example, in a range of 0.06 mm or more and 0.15 mm or less, or in a range of 0.10 mm or more and 0.12 mm or less. Further, the interval between two adjacent water jet nozzles 11 is, for example, in a range of 0.4 mm or more and 1.0 mm or less. Further, the water pressure for the hydroentangling treatment is set depending on the basis weight of the fiber web, and is, for example, in the range of 1 MPa or more and 30 MPa or less. In this way, hydroentanglement is performed to obtain a fibrous web in which each fiber is intertwined, and this fibrous web is conveyed to a drying process.

乾燥工程では、前述の繊維同士が絡み合った繊維ウェブを乾燥機12内にて乾燥し、本実施形態の不織布ワイパーをスパンレース不織布として得る。所定量のセルロース系繊維、合成繊維、及び熱融着繊維を用いるとともに、ウォータージェットノズル11の穴直径φ、ウォータージェットノズル11の間隔、及び水流交絡処理の水圧をそれぞれ前述の範囲にすることで、本実施形態の所定の特性を有するスパンレース不織布を得ることができる。ここで、乾燥条件は特に限定されないが、例えば、80℃以上180℃以下の温度条件で1分以上20分以下の範囲で乾燥を実施すればよい。さらに80℃以上180℃以下の温度条件で熱プレスパート(熱カレンダー等)を実施するのが好ましい。 In the drying step, the fiber web in which the aforementioned fibers are entangled with each other is dried in the dryer 12 to obtain the nonwoven fabric wiper of this embodiment as a spunlace nonwoven fabric. By using a predetermined amount of cellulose fibers, synthetic fibers, and heat-fused fibers, and setting the hole diameter φ of the water jet nozzle 11, the interval between the water jet nozzles 11, and the water pressure of the hydroentangling treatment within the above-mentioned ranges. , a spunlace nonwoven fabric having the predetermined characteristics of this embodiment can be obtained. Here, the drying conditions are not particularly limited, but for example, drying may be carried out at a temperature of 80° C. or higher and 180° C. or lower for 1 minute or more and 20 minutes or less. Furthermore, it is preferable to perform a hot press part (thermal calender, etc.) at a temperature of 80° C. or higher and 180° C. or lower.

以上、本発明を、実施形態を用いて説明したが、本発明の技術的範囲は上記の実施形態に記載の発明の範囲には限定されないことは言うまでもなく、上記実施形態に、多様な変更又は改良を加えることが可能であることが当業者に明らかである。また、そのような変更又は改良を加えた実施形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲の記載から明らかである。 Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiments. It will be obvious to those skilled in the art that modifications may be made. Furthermore, it is clear from the claims that embodiments with such changes or improvements may also be included within the technical scope of the present invention.

以下に実施例及び比較例を挙げ、本実施形態をさらに具体的に説明する。 The present embodiment will be described in more detail with reference to Examples and Comparative Examples below.

(実施例1~7及び比較例1~8)
ビスコースレーヨン(セルロース系繊維)、ポリエチレンテレフタレート繊維(合成繊維)、及びPE/PET芯鞘繊維(熱融着繊維)を表1に示す割合(重量%)で用い、スパンレース不織布を作製し、実施例1~7及び比較例1~8の不織布ワイパーを作製した。得られた不織布ワイパーを下記の通り評価した。結果を表1に示す。
(Examples 1 to 7 and Comparative Examples 1 to 8)
A spunlace nonwoven fabric was produced using viscose rayon (cellulose fiber), polyethylene terephthalate fiber (synthetic fiber), and PE/PET core/sheath fiber (thermal adhesive fiber) in the proportions (wt%) shown in Table 1. Nonwoven fabric wipers of Examples 1 to 7 and Comparative Examples 1 to 8 were produced. The obtained nonwoven fabric wiper was evaluated as follows. The results are shown in Table 1.

〔測定方法〕
実施例1~7及び比較例1~8で得られた各不織布ワイパーについて、下記の試験を実施した。
(目付)JIS P 8124に準拠して測定した。
(厚み)シックネスゲージ(尾崎製作所製、ダイヤルシックネスゲージ「PEACOCK」)を用いて測定した。測定荷重3.7kPa、測定子直径30mmで、測定子と測定台の間に試料(不織布ワイパー1プライ)を置き、測定子を1秒間に1mm以下の速度で下ろしたときのゲージを読み取った。測定は10回繰り返して平均値を求めた。
(密度)目付と厚みより算出した。
(表面強度)ドライテーバー試験を実施した。ドライテーバー試験は、テーバー形摩耗試験機((株)東洋精器製作所製、商品名:Rotary Abrasion Tester TS-2)を使用し、その上部の所定箇所に2個の摩耗輪:CS-0/S-32(Rubber)を対向するように取り付け、試料(不織布ワイパー)を2個の摩耗輪の間に挟み込み、2個の摩耗輪を所定の回数で回転させ、試料(不織布ワイパー)の2個の摩耗輪との接触面を目視観察し、毛羽立ちが生じるまでの回数を測定した。
(湿潤引張強度)JIS P8113に基づき湿潤時の縦横の引張強度を測定した。
(吸水速度)吸水速度はJIS L1907に規定された吸水速度試験に準拠し、0.1mlの水滴が試験片の表面に達したときから、試験片の鏡面反射が消えるまでの時間(秒)を測定して求めた。
(吸油速度)吸水速度の測定で使用した水に代えて油を使用する以外は、吸水速度と同様に測定した。油は、機械油(商品名:FBK-100、エネオス(株)製)を使用した。
(保水量、TWA)不織布を75mm×75mmの正方形に切断してサンプルを作製し、乾燥重量(W1)を測定する。次に、このサンプルを蒸留水中に2分間浸漬した後、水蒸気飽和状態(100%RH)の容器中で、サンプルの1つの角部が上側の頂部となるようにし、この頂部と隣接する2つの角部とを支持して展伸した状態で吊るし、30分放置して重量(W2)を測定する。そして、測定値(W2-W1)をサンプル1m当たりの保水量(g/m)に換算する。
(TOA、吸油量)TWAの測定で使用した蒸留水に替えて油を使用する以外は、TWAと同様の方法で吸油量を測定した。油は、日石機械油(FBK-100)を使用した。
(耐摩耗性)上述のドライテーバー試験を実施し、以下の基準で評価した。図2に、本実施形態の不織布ワイパーにドライテーバー試験を施した後の、不織布ワイパーの表面状態を示す。この写真では、中央部分に毛羽立ちは生じていない。
毛羽立ちまでの回数が2未満のものを「1」
毛羽立ちまでの回数が2以上、5未満のものを「2」
毛羽立ちまでの回数が5以上、8未満のものを「3」
毛羽立ちまでの回数が8以上、11未満のものを「4」
毛羽立ちまでの回数が11以上のものを「5」
(拭き取り性)モニター10名により、平面上に拭き取り対称物である高粘度物(糊、接着剤等)、水又は油を散布し、これを不織布ワイパーで拭き取り、拭き取り易さを5段階で評価した。「5」は一回又は2回程度の拭き取りで拭き取り対象物を完全に拭き取ることができ、不織布ワイパーの破れもなく、「4」は複数回の拭き取りで拭き取り対象物をほぼ完全に拭き取ることができ、不織布ワイパーに少し破れが生じ、「3」は複数回以上拭き取っても、少量の拭き取り対象物が残存し、不織布ワイパーの破れが比較的目立ち、「2」は複数回以上拭き取っても、拭き取り対象物を十分に拭き取ることができず、不織布ワイパーには破れが目立ち、「1」は繰り返し何度も拭き取りをしても、不織布ワイパーの破れが多くなり、拭き取り対象物を十分に拭き取ることができない。
(ゴワゴワ感)モニター10名により、不織布ワイパーの触感を次の基準に従って評価した。「4」は柔らかで滑らかな感触であり、「3」は比較的柔らかであるものの、ゴワゴワ感を多少感じる感触であり、「2」は硬さとゴワゴワ感のある感触であり、「1」は硬さとゴワゴワ感が強い感触である。
(発塵性)
不織布ワイパーの自己発塵性を評価した。JIS B 9923のタンブリング法で、250mm×250mmのサイズの不織布ワイパーを自己発塵させ、発塵させた空気10L中の粒子径0.3μm~5μmの発塵の個数をパーティクルカウンター(商品名:KC-03B、リオン(株)製)で計測した。前述のサイズの不織布ワイパー1枚当たりの発塵個数を求め、下記の基準で評価した。
発塵個数が1100以上のものを「1」
発塵個数が800以上、1100未満のものを「2」
発塵個数が500以上、800未満のものを「3」
発塵個数が100以上、500未満のものを「4」
発塵個数が100以下のものを「5」
〔Measuring method〕
The following tests were conducted on each of the nonwoven fabric wipers obtained in Examples 1 to 7 and Comparative Examples 1 to 8.
(Basic weight) Measured in accordance with JIS P 8124.
(Thickness) Measured using a thickness gauge (manufactured by Ozaki Seisakusho, dial thickness gauge "PEACOCK"). With a measurement load of 3.7 kPa and a probe diameter of 30 mm, a sample (1 ply of nonwoven fabric wiper) was placed between the probe and the measuring stand, and the gauge was read when the probe was lowered at a speed of 1 mm or less per second. The measurement was repeated 10 times and the average value was determined.
(Density) Calculated from basis weight and thickness.
(Surface strength) A dry Taber test was conducted. The dry Taber test uses a Taber type abrasion tester (manufactured by Toyo Seiki Seisakusho Co., Ltd., product name: Rotary Abrasion Tester TS-2), and two wear wheels: CS-0/CS-0/ Attach the S-32 (Rubber) so that they face each other, sandwich the sample (non-woven wiper) between the two wear wheels, rotate the two wear wheels at a predetermined number of times, and remove the two pieces of the sample (non-woven wiper). The contact surface with the worn wheel was visually observed, and the number of times until fluffing occurred was measured.
(Wet tensile strength) The vertical and horizontal tensile strengths in wet conditions were measured based on JIS P8113.
(Water absorption rate) The water absorption rate is based on the water absorption rate test specified in JIS L1907, and is the time (seconds) from when a 0.1 ml water drop reaches the surface of the test piece until the specular reflection of the test piece disappears. It was determined by measurement.
(Oil absorption rate) The water absorption rate was measured in the same manner as the water absorption rate, except that oil was used instead of the water used in the water absorption rate measurement. Machine oil (trade name: FBK-100, manufactured by Eneos Co., Ltd.) was used as the oil.
(Water retention amount, TWA) A sample is prepared by cutting the nonwoven fabric into a square of 75 mm x 75 mm, and the dry weight (W1) is measured. Next, after immersing this sample in distilled water for 2 minutes, place it in a container saturated with water vapor (100% RH) so that one corner of the sample becomes the top of the upper side, and the two adjacent to this top. The sample was hung in a stretched state with the corners supported, and the weight (W2) was measured after being left for 30 minutes. Then, the measured value (W2-W1) is converted into the water retention amount (g/m 2 ) per 1 m 2 of the sample.
(TOA, oil absorption) Oil absorption was measured in the same manner as for TWA, except that oil was used instead of distilled water used in TWA measurement. As the oil, Nippon Oil Machinery Oil (FBK-100) was used.
(Abrasion resistance) The above-mentioned dry Taber test was carried out and evaluation was made according to the following criteria. FIG. 2 shows the surface state of the nonwoven fabric wiper of this embodiment after the dry Taber test was performed on the nonwoven fabric wiper. In this photo, there is no fluffing in the center.
“1” indicates that the number of times until fluffing is less than 2
If the number of times until fluffing is 2 or more and less than 5, it is rated “2”.
"3" if the number of times until fluffing is 5 or more and less than 8
"4" if the number of times until fluffing is 8 or more but less than 11
``5'' if the number of times until fluffing is 11 or more
(Wipeability) Ten monitors sprayed a high viscosity material (glue, adhesive, etc.), water or oil on a flat surface, wiped it off with a non-woven wiper, and evaluated the ease of wiping on a five-point scale. did. "5" means that the object to be wiped can be completely wiped off with one or two wipes, and the non-woven wiper will not be torn, and "4" means that the object to be wiped can be almost completely wiped off with multiple wipes. The non-woven wiper may be slightly torn, and in "3" a small amount of the object to be wiped remains even after wiping multiple times, and the tear in the non-woven wiper is relatively noticeable, and in "2" even after wiping multiple times, The object to be wiped cannot be wiped sufficiently, and the non-woven wiper has noticeable tears, and "1" means that even after repeated wiping, the non-woven wiper has many tears and the object to be wiped cannot be sufficiently wiped. I can't.
(Rough Feeling) Ten monitors evaluated the feel of the nonwoven fabric wiper according to the following criteria. "4" means a soft and smooth feel, "3" means a relatively soft but somewhat stiff feel, "2" means a hard and stiff feel, and "1" means a feeling of hardness and stiffness. It has a strong hard and stiff feel.
(Dust generation)
The self-dusting property of the nonwoven wiper was evaluated. Using the tumbling method of JIS B 9923, a nonwoven wiper with a size of 250 mm x 250 mm is allowed to self-generate dust, and the number of particles with a particle size of 0.3 μm to 5 μm in 10 L of the generated air is measured using a particle counter (product name: KC). -03B, manufactured by Rion Co., Ltd.). The number of dust generated per nonwoven fabric wiper of the above-mentioned size was determined and evaluated based on the following criteria.
``1'' indicates that the number of dust particles is 1100 or more
``2'' indicates that the number of dust particles is 800 or more and less than 1,100.
``3'' indicates that the number of dust particles is 500 or more and less than 800.
``4'' indicates that the number of dust particles is 100 or more and less than 500.
``5'' indicates that the number of dust particles is 100 or less

実施例1~7の不織布ワイパーは、耐摩耗性、高粘性物、水、油の拭き取り性、ゴワゴワ感(ゴワゴワ感がなく、柔らかで滑らかな感触)、発塵性(発塵しにくい)という各特性をバランス良くかつ高水準で併せ持ち、各種工業分野において清拭用不織布ワイパーとして好適に使用できる。 The nonwoven fabric wipers of Examples 1 to 7 have excellent abrasion resistance, ability to wipe off highly viscous materials, water, and oil, stiffness (soft and smooth feel without stiffness), and dust generation (hard to generate dust). It has a well-balanced and high level of properties, and can be suitably used as a nonwoven wiper for cleaning in various industrial fields.

(比較例1)目付が低すぎるため、吸液性、拭き取り性、表面強度が低い。
(比較例2)目付が高すぎるため、ごわごわ感があり、発塵しやすい。
(比較例3)厚みが低く、密度が高い為、拭き取り性が劣る。
(比較例4)厚みが高すぎるため、表面強度、発塵性が低い。
(比較例5)ドライテーバー値が低い為、表面強度、発塵性が低い。
(比較例6)合成樹脂比率が高すぎるため、水の拭き取り性が低く、ゴワゴワ感がある。
(比較例7)熱融着繊維比率が低い為、表面強度、発塵性が低い。
(比較例8)熱融着繊維比率が高い為、水の拭き取り性が低く、ゴワゴワ感がある。
(Comparative Example 1) Since the basis weight is too low, liquid absorption, wipeability, and surface strength are low.
(Comparative Example 2) Since the basis weight is too high, it feels stiff and easily generates dust.
(Comparative Example 3) Since the thickness is low and the density is high, the wiping performance is poor.
(Comparative Example 4) Since the thickness is too high, surface strength and dust generation are low.
(Comparative Example 5) Since the Dry Taber value is low, surface strength and dust generation are low.
(Comparative Example 6) Since the synthetic resin ratio was too high, the water wiping property was low and there was a feeling of stiffness.
(Comparative Example 7) Since the heat-fused fiber ratio is low, surface strength and dust generation are low.
(Comparative Example 8) Since the ratio of heat-fusible fibers is high, the water wiping property is low and there is a feeling of stiffness.

10 カード機
11 ウォータージェットノズル
12 乾燥機
10 Card machine 11 Water jet nozzle 12 Dryer

Claims (4)

セルロース系繊維、合成繊維、及び熱融着繊維を含む不織布ワイパーであって、
前記合成繊維の含有量が前記不織布ワイパー全量の3重量%以上50重量%以下であり、かつ前記熱融着繊維の含有量が前記不織布ワイパー全量の10重量%以上30重量%以下であり、
目付が25g/m以上35g/m以下、厚みが0.25mm/1ply以上、密度が0.080g/cm以上0.130g/cm以下、ドライテーバー測定値が5回以上である、不織布ワイパー。
A nonwoven wiper comprising cellulose fibers, synthetic fibers, and heat-fused fibers,
The content of the synthetic fiber is 3% by weight or more and 50% by weight or less of the total amount of the nonwoven fabric wiper, and the content of the heat-fusion fiber is 10% by weight or more and 30% by weight or less of the total amount of the nonwoven fabric wiper,
The basis weight is 25 g/m 2 or more and 35 g/m 2 or less, the thickness is 0.25 mm/1 ply or more, the density is 0.080 g/cm 3 or more and 0.130 g/cm 3 or less, and the dry taber measurement value is 5 or more times. Non-woven wiper.
湿潤相対引張強度(GMT)が5.5N/25mm以上20.0N/25mm以下である、請求項1に記載の不織布ワイパー。 The nonwoven fabric wiper according to claim 1, having a wet relative tensile strength (GMT) of 5.5 N/25 mm or more and 20.0 N/25 mm or less. 吸水速度が20秒以下、吸油速度が260秒以下、T.W.A.が170g/m以上、T.O.A.が170g/m以上である、請求項1又は請求項2に記載の不織布ワイパー。 Water absorption speed is 20 seconds or less, oil absorption speed is 260 seconds or less, T. W. A. is 170g/ m2 or more, T. O. A. The nonwoven fabric wiper according to claim 1 or claim 2, wherein the nonwoven fabric wiper is 170 g/m 2 or more. 前記合成繊維が熱可塑性樹脂繊維であり、かつ前記熱融着繊維が芯鞘型複合繊維である、請求項1乃至請求項3のいずれか1項に記載の不織布ワイパー。 The nonwoven fabric wiper according to any one of claims 1 to 3, wherein the synthetic fiber is a thermoplastic resin fiber, and the heat-fusion fiber is a core-sheath type composite fiber.
JP2022059111A 2022-03-31 2022-03-31 Nonwoven fabric wiper Pending JP2023150158A (en)

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