JP2016183433A - Wet type sheet making non-woven fabric - Google Patents

Wet type sheet making non-woven fabric Download PDF

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JP2016183433A
JP2016183433A JP2015064481A JP2015064481A JP2016183433A JP 2016183433 A JP2016183433 A JP 2016183433A JP 2015064481 A JP2015064481 A JP 2015064481A JP 2015064481 A JP2015064481 A JP 2015064481A JP 2016183433 A JP2016183433 A JP 2016183433A
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nonwoven fabric
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木原　幸弘
Yukihiro Kihara
幸弘 木原
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Abstract

PROBLEM TO BE SOLVED: To provide a non-woven fabric having no weight unevenness, exhibiting uniform appearance and also excellent in bulkiness.SOLUTION: Provided is a wet type sheet making non-woven fabric in which the cross-sectional shape of short cut fiber composing the wet type sheet making non-woven fabric being an almost Y4 shape connected to the upper-lower and the right-left at the lower edge of almost the Y shape, and its single fiber fineness is 10 decitex or higher. The short cut fiber is preferably composed of polyethylene terephthalate. Further, it is preferable that the wet type sheet making non-woven fabric includes thermo-adhesive fiber, and the thermo-adhesive components of the thermo-adhesive fiber are melted or softened, thus each constituting fiber is adhered and integrated.SELECTED DRAWING: Figure 2

Description

本発明は、嵩高性を有する湿式抄造不織布に関するものである。   The present invention relates to a wet papermaking nonwoven fabric having bulkiness.

繊維長が１０ｍｍ未満のいわゆるショートカット繊維やパルプ繊維を用いて、湿式抄造することにより得られる湿式不織布は、抄造する際に、繊維が十分均一に懸濁してなるスラリーを用いるため、目付斑が少なく、地合いの良好な不織布が得られる。   The wet nonwoven fabric obtained by wet papermaking using so-called shortcut fibers or pulp fibers with a fiber length of less than 10 mm uses a slurry in which the fibers are sufficiently uniformly suspended during paper making, so there is less spotted spots. A nonwoven fabric with a good texture can be obtained.

しかしながら、このような湿式不織布は、構成繊維の繊維長が短いため、強度に劣る場合がある。また、湿式抄造する際に、水中で繊維を十分に分散させる必要があるため、繊維には機械捲縮が施されないノークリンプの繊維が使用され、得られる湿式不織布は、繊維間の空隙が小さく嵩密なシートとなる。   However, such a wet nonwoven fabric may be inferior in strength because the fiber length of the constituent fibers is short. In addition, when wet papermaking, it is necessary to sufficiently disperse the fibers in water, so that no crimped fibers that are not subjected to mechanical crimping are used for the fibers. It becomes a dense sheet.

このような背景のなか、特許文献１には、顕在捲縮性繊維と潜在捲縮性繊維とを構成繊維とすることにより、従来にない嵩高さを湿式不織布に付与する技術が提案されている。   Against such a background, Patent Document 1 proposes a technique for imparting unprecedented bulkiness to a wet nonwoven fabric by using manifest crimpable fibers and latent crimpable fibers as constituent fibers. .

特許第５０３７９６４号公報Japanese Patent No. 5037964

本発明は、目付斑がなく、均一な外観を呈し、かつ嵩高性に優れた不織布を提供することを課題とする。本発明者は、前記課題を達成するために検討しているなかで、特定の異型断面を採用すると、嵩高性を付与でき、かつ外力が加わった場合でも嵩高性を維持しうることを見出し、本発明に到達した。   An object of the present invention is to provide a non-woven fabric that has no uneven appearance, exhibits a uniform appearance, and is excellent in bulkiness. The present inventor has found that the bulkiness can be imparted and the bulkiness can be maintained even when an external force is applied by adopting a specific atypical cross-section, while considering the above-mentioned problems. The present invention has been reached.

すなわち、本発明の要旨は、湿式抄造不織布を構成するショートカット繊維の横断面形状が、略Ｙ字の下端で上下左右に連結した

Figure 2016183433
That is, the gist of the present invention is that the cross-sectional shape of the shortcut fiber constituting the wet papermaking nonwoven fabric is connected to the top, bottom, left and right at the lower end of a substantially Y shape.
Figure 2016183433

形状（以下、「略Ｙ４形状」という。）で、その繊度が１０デシテックス以上であることを特徴とする湿式抄造不織布である。 A wet papermaking nonwoven fabric having a shape (hereinafter referred to as “substantially Y4 shape”) and a fineness of 10 dtex or more.

本発明における湿式抄造不織布は、その構成繊維の横断面形状に特徴を有するものである。この横断面形状は、図１に示すような略Ｙ字を四個持つものである。そして、略Ｙ字の下端１で上下左右に連結して、図２に示すような略Ｙ４形状となっている。また、中央の略＋字部５と、略＋字部５の各先端に連結された四個の略Ｖ字部６により、高剛性となっている。すなわち、六角形やＹ字等の単なる異形ではなく、剛性の高い略＋字部５と略Ｖ字部６の組み合わせによって、より高剛性となるのである。また、繊維の異型度が大きいことや、繊度も１０デシテックス以上と大きいことから、一定体積中の繊維が存在しない箇所の比率（空隙率）が大きくなり、嵩高となる。また、繊維自体が高剛性であるため、繊維間の空隙は外力によって潰れにくく、圧力が加わった場合でも不織布の嵩高性が維持される。   The wet papermaking nonwoven fabric in the present invention is characterized by the cross-sectional shape of its constituent fibers. This cross-sectional shape has four substantially Y-characters as shown in FIG. And it is connected to the upper and lower sides and the right and left at the lower end 1 of a substantially Y shape, and has a substantially Y4 shape as shown in FIG. Moreover, it is highly rigid by the substantially + character part 5 of the center, and the four substantially V-shaped parts 6 connected with each front-end | tip of the substantially + character part 5. In other words, it is not a simple shape such as a hexagon or a Y-shape, but a higher rigidity is achieved by a combination of the substantially + -shaped portion 5 and the substantially V-shaped portion 6 having high rigidity. Moreover, since the degree of atypicality of the fibers is large and the fineness is as large as 10 dtex or more, the ratio (porosity) of the portions where the fibers are not present in a certain volume is increased and the bulk is increased. Further, since the fibers themselves are highly rigid, the gaps between the fibers are not easily crushed by an external force, and the bulkiness of the nonwoven fabric is maintained even when pressure is applied.

湿式抄造不織布を構成する前記した略Ｙ４形状の繊維は、熱可塑性重合体によって構成される。機械的強度に優れ、剛性に優れることから、ポリエステル系重合体によって構成されることが好ましく、なかでもポリエチレンテレフタレートによって構成されることがより好ましい。   The aforementioned substantially Y4-shaped fibers constituting the wet papermaking nonwoven fabric are made of a thermoplastic polymer. Since it is excellent in mechanical strength and excellent in rigidity, it is preferably composed of a polyester polymer, and more preferably composed of polyethylene terephthalate.

湿式抄造不織布の構成繊維は、繊維長が２〜１０ｍｍ程度のショートカット繊維が用いられる。また、水中で良好に分散しやすくするために、繊維には機械捲縮等のクリンプは付与させずノークリンプのストレートの形態を採用する。機械捲縮を付与しないことにより、前記した特殊な異型断面形状を変形させることなく維持するため、異型断面に起因する効果（嵩高性と剛性）を効率的に発揮できる。   As the constituent fibers of the wet papermaking nonwoven fabric, shortcut fibers having a fiber length of about 2 to 10 mm are used. Further, in order to facilitate easy dispersion in water, the fiber is not subjected to crimp such as mechanical crimping, and a straight form of no crimp is employed. By not providing mechanical crimping, the above-described special irregular cross-sectional shape is maintained without being deformed, so that the effects (bulkyness and rigidity) resulting from the irregular cross-section can be efficiently exhibited.

このような略Ｙ４形状のショートカット繊維を製造するにあたっては、ノズル孔を変更する以外は、従来公知の方法で得られる。すなわち、熱可塑性重合体を溶融紡糸して特殊な異型断面の繊維を得るために、溶融紡糸する際に用いるノズル孔の形状が、Ｙ字の下端で上下左右に連結し、かつ、隣り合うＹ字の／同士及び＼同士が平行である

Figure 2016183433
In manufacturing such a substantially Y4-shaped shortcut fiber, it can be obtained by a conventionally known method except that the nozzle hole is changed. That is, in order to obtain a specially shaped cross-section fiber by melt spinning the thermoplastic polymer, the shape of the nozzle hole used for melt spinning is connected to the upper and lower sides and the left and right at the lower end of the Y shape, and adjacent Y The characters / / and \ are parallel
Figure 2016183433

形状（以下、「Ｙ４形」という。）のものを用いる。 A shape (hereinafter referred to as “Y4 shape”) is used.

このノズル孔は、図３に示すＹ字を四個持つものである。そして、Ｙ字の下端７で上下左右に連結して、図４に示すＹ４形となっている。このＹ４形は、隣り合うＹ字の／８，８同士が平行であり、また＼９，９同士が平行となっている。かかるＹ４形のノズル孔に熱可塑性樹脂を供給して溶融紡糸することにより、横断面が略Ｙ４形状の繊維を得ることができるのである。特に、隣り合うＹ字の／８，８同士及び＼９，９同士が平行となっていることにより、四個の凹部２を持つ繊維を得ることができる。また、略＋字部５と、その各々の先端に設けられた略Ｖ字部６とを持つ繊維を得ることができる。 Ｙ４形のノズル孔に供給する熱可塑性重合体は、一種類であってもよいし、二種以上であってもよい。   This nozzle hole has four Y characters shown in FIG. And it connects with the upper and lower sides and right and left by the lower end 7 of Y character, and becomes Y4 form shown in FIG. In this Y4 form, adjacent Y-shaped / 8s and 8s are parallel to each other, and \ 9,9s are parallel to each other. By supplying a thermoplastic resin to such Y4 nozzle holes and melt spinning, fibers having a substantially Y4 cross section can be obtained. In particular, fibers having four concave portions 2 can be obtained by making adjacent Y-shaped / 8,8 and \ 9,9 parallel to each other. Moreover, the fiber which has the substantially + character part 5 and the substantially V-shaped part 6 provided in each front-end | tip can be obtained. The thermoplastic polymer supplied to the Y4 nozzle hole may be one type or two or more types.

略Ｙ４形状のショートカット繊維の繊度は、剛性を考慮して１０デシテックス以上とする。また、１５デシテックス以上であることが好ましい。繊度は大きいほど剛性に優れる傾向にあるが、上限は４０デシテックス程度とする。   The fineness of the substantially Y4-shaped shortcut fiber is set to 10 dtex or more in consideration of rigidity. Moreover, it is preferable that it is 15 decitex or more. The higher the fineness, the better the rigidity, but the upper limit is about 40 dtex.

湿式抄造不織布には、略Ｙ４形状のショートカット繊維以外に、本発明の目的が達成される範囲において、針葉樹パルプや広葉樹パルプ等の天然パルプ、ポリエチレンやポリプロピレン等の合成パルプ等を混ぜてもよい。また、構成繊維同士を接着して一体化するためのバインダーが含まれているとよい。このようなバインダーとしては、熱により溶融し熱接着剤として機能する熱可塑性重合体によって構成される熱接着性繊維や、熱水により溶解して接着剤として機能するビニロンバインダー繊維等が挙げられる。熱接着性繊維を用いる場合は、接着強力を考慮して、ポリエステル系の熱接着性繊維であって、鞘成分が熱接着成分となる芯鞘型熱接着繊維を好ましく用いることが好ましい。略Ｙ４形状のショートカット繊維と熱接着性繊維との混合比率は、略Ｙ４形状のショートカット繊維／接着繊維＝６０／４０〜９０／１０がよく、６０／４０〜８０／２０がより好ましい。また、熱接着性繊維の繊度は、略Ｙ４形状のショートカット繊維の繊度よりも小さいものを使用する。熱接着繊維の繊度をより小さいものを使用することにより、熱接着点が増やすことができる。具体的には、熱接着性繊維の繊度は、１〜５デシテックス程度が好ましい。   In addition to the substantially Y4-shaped shortcut fibers, the wet papermaking nonwoven fabric may be mixed with natural pulp such as softwood pulp and hardwood pulp, synthetic pulp such as polyethylene and polypropylene, and the like as long as the object of the present invention is achieved. Moreover, the binder for adhere | attaching and integrating component fibers is good. Examples of such a binder include a thermoadhesive fiber composed of a thermoplastic polymer that melts by heat and functions as a thermal adhesive, and a vinylon binder fiber that dissolves in hot water and functions as an adhesive. In the case of using a heat-adhesive fiber, it is preferable to use a core-sheath type heat-adhesive fiber that is a polyester-based heat-adhesive fiber and has a sheath component as a heat-adhesive component in consideration of adhesive strength. The mixing ratio of the substantially Y4-shaped shortcut fiber and the heat-adhesive fiber is preferably approximately Y4-shaped shortcut fiber / adhesive fiber = 60/40 to 90/10, more preferably 60/40 to 80/20. The fineness of the heat-adhesive fiber is smaller than that of the substantially Y4-shaped shortcut fiber. The thermal bonding point can be increased by using a thermal bonding fiber having a smaller fineness. Specifically, the fineness of the heat-adhesive fiber is preferably about 1 to 5 dtex.

湿式抄造不織布の目付は、用途や要求性能に応じて適宜設定すればよく、１０〜３００ｇ／ｍ２程度がよい。 What is necessary is just to set the fabric weight of a wet papermaking nonwoven fabric suitably according to a use or required performance, and about 10-300 g / m < 2 > is good.

本発明の湿式抄造不織布は、例えば、以下の方法により得ることができる。   The wet papermaking nonwoven fabric of the present invention can be obtained, for example, by the following method.

まず、抄造ウェブの原料となる繊維懸濁液を準備する。抄造ウェブの構成繊維である略Ｙ４形状のショートカット繊維と接着剤となる熱接着性繊維、必要に応じて分散剤等を水中に投入して離解し、均一な分散液を調製する。なお、長時間の離解作業により繊維同士がもつれることや繊維がダメージを受けることを防ぐためにも、離解はできるだけ短い時間で行うのが好ましい。この工程で繊維の束を極力なくし、単繊維状に分散させておく。離解を行った繊維分散液は、緩やかな攪拌のもと必要に応じて希釈し、高分子のポリアクリルアミド溶液、ポリエチレンオキサイド溶液等の粘剤を適宜添加することで、均一な分散状態の繊維懸濁液（スラリー）を調製する。なお、離解が容易な繊維や、原料段階で水分と繊維とが混合してなるものを用いる場合については、攪拌のみにて分散させるとよい。   First, a fiber suspension serving as a raw material for the papermaking web is prepared. A substantially Y4-shaped shortcut fiber, which is a constituent fiber of the papermaking web, a heat-adhesive fiber serving as an adhesive, and a dispersing agent, if necessary, are poured into water and disaggregated to prepare a uniform dispersion. In order to prevent the fibers from becoming tangled or damaged by the long-time disaggregation operation, it is preferable to disaggregate in as short a time as possible. In this step, the bundle of fibers is eliminated as much as possible and dispersed in a single fiber form. The disperse fiber dispersion is diluted as necessary under gentle agitation, and appropriately added with a sticking agent such as a polymer polyacrylamide solution or a polyethylene oxide solution, so that the fiber suspension in a uniform dispersion state can be obtained. A suspension (slurry) is prepared. In addition, about the case where the fiber which a disaggregation is easy, and the thing formed by mixing a water | moisture content and a fiber in a raw material stage are used, it is good to disperse | distribute only by stirring.

得られた繊維懸濁液は、手漉きでもよいが、効率的に得るには、機械漉きである円網、長網、短網、傾斜式等のワイヤーの少なくとも一つを有する抄紙機を用い、抄造ウェブとする。得られた抄造ウェブは、必要に応じてプレス工程を経て、乾燥・熱処理工程に移動し、原料中の水分を除去し、乾燥させて、湿式抄造不織布とする。抄造ウェブ中に、接着剤として、ポリエステル系熱接着性繊維やビニロンバイダー繊維を用いた場合は、含水状態にて乾燥工程での加熱されることにより、ポリエステル系熱接着繊維の場合は熱接着成分が溶融または軟化して熱接着剤として機能し、また、ビニロンバインダー繊維の場合はビニロン繊維が溶解して接着剤として機能し、該接着剤を介して、抄造ウェブを構成するショートカット繊維同士が接着されて一体化する。ポリエステル熱接着性繊維を用いた場合は、乾燥工程での設定温度を、熱接着剤として機能する熱可塑性重合体が溶融または軟化する温度に設定するとよい。乾燥工程は、加熱フラットローラー、ヤンキードライヤー、熱風乾燥機等を用いればよいが、繊維の横断面形状が変形しにくく良好に維持しうることから、熱風を吹付けて熱処理を施す熱風乾燥機（エアスルー）を好ましく用いる。   The obtained fiber suspension may be hand-made, but in order to obtain it efficiently, use a paper machine having at least one of wire such as a circular net, a long net, a short net, an inclined type, etc. A paper web. The obtained paper web is subjected to a pressing process as necessary and then moved to a drying / heat treatment process to remove moisture in the raw material and dried to obtain a wet papermaking nonwoven fabric. When using polyester-based heat-adhesive fiber or vinylon binder fiber as the adhesive in the papermaking web, it is heated in the drying process in a water-containing state. Melts or softens to function as a thermal adhesive, and in the case of vinylon binder fiber, the vinylon fiber dissolves and functions as an adhesive, via which the shortcut fibers constituting the papermaking web are bonded together To be integrated. In the case where polyester heat-adhesive fibers are used, the set temperature in the drying step may be set to a temperature at which the thermoplastic polymer functioning as a heat adhesive melts or softens. The drying process may be performed by using a heating flat roller, a Yankee dryer, a hot air dryer or the like. However, since the cross-sectional shape of the fiber is difficult to be deformed and can be maintained satisfactorily, a hot air dryer that performs heat treatment by blowing hot air ( Air through) is preferably used.

本発明の湿式抄造不織布は、略Ｙ４断面形状の繊維により構成されていることから、剛性を有し、かつ高い嵩高性を有しながら、不織布表面は湿式抄造不織布の特徴である均一な表面形態を呈する。剛性があり、かつ繊維間の空隙が大きいにも関わらず外力によって変形しにくく嵩高性を維持するため、各種フィルター、フィルター基材、フィルター補強材、農業資材、建築材料、ワイピングクロスやワイピングクロス材料等として好適に使用しうる。   Since the wet papermaking nonwoven fabric of the present invention is composed of fibers having a substantially Y4 cross-sectional shape, the surface of the nonwoven fabric has a uniform surface morphology that is characteristic of the wet papermaking nonwoven fabric while having rigidity and high bulkiness. Presents. Various filters, filter base materials, filter reinforcements, agricultural materials, building materials, wiping cloths and wiping cloth materials in order to maintain bulkiness while being rigid and not easily deformed by external forces despite the large gap between fibers Etc. can be suitably used.

本発明によれば、抄造ウェブの特徴である目付斑がなく均一で地合いが良好であるという特徴と有しながら、抄造ウェブにはない嵩高性と剛性を有し、かつその嵩高性は、外力によっても変形しにくい嵩保持性も併せ持つ湿式抄造不織布を提供することができる。   According to the present invention, the paper web has the characteristic that the paper web has no unevenness and is uniform and has a good texture, but has the bulkiness and rigidity that the papermaking web does not have. It is possible to provide a wet papermaking nonwoven fabric that also has a bulk retention property that is not easily deformed.

以下、実施例により本発明を具体的に説明するが、本発明はこれらの実施例に限定されるものではない。なお、実施例における各特性値は、以下のようにして求めた。
（１）ポリエステルの相対粘度［ηｒｅｌ］；フェノールと四塩化エタンとの等質量比の混合溶媒１００ｃｃに試料０．５ｇを溶解し、２０℃で測定した。
（２） 融点（℃）；パーキンエルマー社製の示差走査熱量計ＤＳＣ−７型を用い、昇温速度２０℃／分で測定した。 EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. In addition, each characteristic value in an Example was calculated | required as follows.
(1) Relative viscosity of polyester [ηrel]: 0.5 g of a sample was dissolved in 100 cc of a mixed solvent having an equal mass ratio of phenol and ethane tetrachloride and measured at 20 ° C.
(2) Melting point (° C.): Measured at a heating rate of 20 ° C./min using a differential scanning calorimeter DSC-7 manufactured by PerkinElmer.

実施例
ポリエチレンテレフタレート（相対粘度〔ηｒｅｌ〕１．３８、融点２６０℃）を準備し、図４に示したノズル孔を用いて、紡糸温度２８５℃、単孔吐出量６．６７ｇ／分で溶融紡糸し、速度１０００ｍ／分で引き取った。引き取った未延伸糸は、延伸温度１４０℃で延伸し、次いで熱ローラーで緊張熱処理を行い、分散油剤を付与した後、カットして、単繊維繊度１６．５デシテックス、繊維長５ｍｍの横断面形状が略Ｙ４形のショートカット繊維を得た。 EXAMPLE Polyethylene terephthalate (relative viscosity [ηrel] 1.38, melting point 260 ° C.) was prepared, and melt spinning using a nozzle hole shown in FIG. 4 at a spinning temperature of 285 ° C. and a single-hole discharge rate of 6.67 g / min. And was taken at a speed of 1000 m / min. The undrawn yarn taken up is drawn at a drawing temperature of 140 ° C., then subjected to tension heat treatment with a heat roller, and after applying a dispersion oil agent, it is cut and cut to have a single fiber fineness of 16.5 dtex and a fiber length of 5 mm. Obtained a shortcut fiber of approximately Y4 shape.

次いで、繊維懸濁液を準備した。横断面形状が略Ｙ４形のショートカット繊維と、熱接着性繊維として、芯鞘型のポリエステル系熱接着性繊維（ユニチカ株式会社製 商品名「メルティ４０８０」単繊維繊度３デシテックス、繊維長５ｍｍ）を用い、略Ｙ４形のショートカット繊維／熱接着性繊維の混合比率を８０／２０として、パルプ離解機に投入し、３０００ｒｐｍにて２分間撹拌して繊維懸濁液とした。   A fiber suspension was then prepared. Short-sleeved fibers with a cross-sectional shape of approximately Y4 and a core-sheath polyester-based heat-adhesive fiber (trade name “Melty 4080”, single fiber fineness 3 dtex, fiber length 5 mm, manufactured by Unitika Ltd.) as the heat-adhesive fiber The mixture was used as a fiber suspension by using a substantially Y4-shaped shortcut fiber / thermal adhesive fiber mixing ratio of 80/20 and stirring the mixture at 3000 rpm for 2 minutes.

得られた繊維混濁液を、抄造装置の容器内に投入し、多孔板かき混ぜ器を用いて１分間撹拌した後、抄造を行い、抄造ウェブを得た。得られた抄造ウェブを１３０℃に設定した熱風乾燥機内に投入し、水分を除去するとともに熱接着させるための熱処理を施し、実施例の湿式抄造不織布（目付１０２ｇ／ｍ２）を得た。 The obtained fiber turbid liquid was put into a container of a papermaking apparatus, stirred for 1 minute using a perforated plate stirrer, and then papermaking was performed to obtain a papermaking web. The obtained paper web was put into a hot air dryer set at 130 ° C., and subjected to heat treatment for removing water and thermally bonding, to obtain a wet paper web nonwoven fabric (weight per unit area: 102 g / m 2 ).

比較例
実施例において、主体となるショートカット繊維として、略Ｙ４形のショートカット繊維に換えて、横断面が円形、繊度３デシテックス、繊維長５ｍｍのポリエチレンテレフタレートからなるショートカット繊維を用いたこと以外は、実施例と同様にして、比較例の湿式抄造不織布（目付１０６ｇ／ｍ２）を得た。 Comparative Example In the examples, the shortcut fiber that is the main component was replaced with a shortcut fiber of substantially Y4 shape, except that a shortcut fiber made of polyethylene terephthalate having a circular cross section, a fineness of 3 dtex, and a fiber length of 5 mm was used. In the same manner as in the example, a wet papermaking nonwoven fabric (weight per unit area: 106 g / m 2 ) as a comparative example was obtained.

得られた実施例および比較例の湿式抄造不織布について、２種類の荷重（１．９６ｋＰａ、９．８ｋＰａ）を加えた際の厚みを測定し、荷重による厚み変化を評価した結果を表１に示す。なお、空隙率は、ポリエステルの密度を１．３７ｇ／ｃｃとして算出した。   Table 1 shows the results of measuring the thickness when two types of loads (1.96 kPa, 9.8 kPa) were applied to the obtained wet papermaking nonwoven fabrics of Examples and Comparative Examples, and evaluating the thickness change due to the load. . The porosity was calculated with the density of the polyester being 1.37 g / cc.

また、参考例として、実施例１のショートカット繊維と同様の略Ｙ４形の横断面形状の繊度１６．５デシテックスの長繊維によって構成されるスパンボンド不織布であって、熱エンボス加工により部分的に熱圧着されることによって一体化してなるスパンボンド不織布（目付約１２０ｇ／ｍ２）の厚みについて、参考までに表１に示した。なお、参考例のスパンボンド不織布は、熱エンボス加工が施されたものであることから、その形態に起因して、空隙率が実施例や比較例に比べて低く、厚み変化率も小さい。 Also, as a reference example, a spunbonded nonwoven fabric composed of long fibers having a fineness of 16.5 dtex similar to the shortcut fiber of Example 1 and having a partially cross-sectional shape by heat embossing. The thickness of the spunbonded nonwoven fabric (approx. 120 g / m 2 ) that is integrated by being pressed is shown in Table 1 for reference. In addition, since the spunbonded nonwoven fabric of the reference example has been subjected to heat embossing, due to its form, the porosity is lower than that of Examples and Comparative Examples, and the rate of change in thickness is also small.

Figure 2016183433
Figure 2016183433

本発明の湿式抄造不織布は、比較例の湿式抄造不織布に比べて、嵩高性に優れるとともに、荷重を加えられた際の空隙保持性にも優れていることがわかる。
It can be seen that the wet papermaking nonwoven fabric of the present invention is superior in bulkiness as compared with the wet papermaking nonwoven fabric of the comparative example and also excellent in void retention when a load is applied.

本発明における繊維の横断面形状である略Ｙ４形状の一つの略Ｙ字を示した図である。It is the figure which showed one substantially Y character of the substantially Y4 shape which is the cross-sectional shape of the fiber in this invention. 本発明における繊維の横断面形状である略Ｙ４形状を示した図である。It is the figure which showed the substantially Y4 shape which is the cross-sectional shape of the fiber in this invention. 本発明における繊維を得るためのＹ４形のノズル孔のひとつのＹ字を示した図である。It is the figure which showed one Y character of the Y4 type nozzle hole for obtaining the fiber in this invention. 本発明における繊維を得るためのＹ４形のノズル孔を示した図である。It is the figure which showed the Y4 type nozzle hole for obtaining the fiber in this invention.

１ 繊維横断面形状である略Ｙ４形状の一つの略Ｙ字の下端
２ 略Ｙ４形状で形成された凹部
３ 略Ｙ４形状で形成された凸部
４ 略Ｙ４形状で形成された小凹部
５ 略Ｙ４形状中の略十字部
６ 略Ｙ４形状中の略Ｖ字部
７ 溶融紡糸する際のノズル孔の形状であるＹ４形状の一つのＹ字の下端
８ Ｙ字の／
９ Ｙ字の＼
DESCRIPTION OF SYMBOLS 1 One substantially Y-shaped lower end of the substantially Y4 shape which is fiber cross-sectional shape 2 The recessed part formed in the substantially Y4 shape 3 The convex part 4 formed in the substantially Y4 shape The small recessed part 5 formed in the substantially Y4 shape About Y4 Approximate cross section 6 in the shape Approximate V-shaped section 7 in the approximate Y4 shape One Y-shaped lower end 8 of the Y4 shape that is the shape of the nozzle hole at the time of melt spinning
9 Y-shaped \

Claims (3)

湿式抄造不織布を構成するショートカット繊維の横断面形状が、略Ｙ字の下端で上下左右に連結した
Figure 2016183433
形状（以下、「略Ｙ４形状」という。）で、その繊度が１０デシテックス以上であることを特徴とする湿式抄造不織布。 The cross-sectional shape of the shortcut fibers that make up the wet papermaking nonwoven fabric is connected to the top, bottom, left and right at the lower end of the approximate Y
Figure 2016183433
A wet papermaking nonwoven fabric having a shape (hereinafter referred to as “substantially Y4 shape”) and a fineness of 10 dtex or more. ショートカット繊維が、ポリエチレンテレフタレートによって構成されることを特徴とする請求項１記載の湿式抄造不織布。 The wet papermaking nonwoven fabric according to claim 1, wherein the shortcut fiber is composed of polyethylene terephthalate. 湿式抄造不織布が、熱接着性繊維を含み、熱接着性繊維の熱接着成分が溶融または軟化することにより、構成繊維同士が接着一体化していることを特徴とする請求項１または２記載の湿式抄造不織布。
The wet-type nonwoven fabric according to claim 1 or 2, wherein the wet-made nonwoven fabric contains heat-adhesive fibers, and the constituent fibers are bonded and integrated by melting or softening the heat-adhesive component of the heat-adhesive fibers. Papermaking nonwoven fabric.
JP2015064481A 2015-03-26 2015-03-26 Wet type sheet making non-woven fabric Pending JP2016183433A (en)

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TWI836333B (en) * 2021-12-20 2024-03-21 南韓商可隆股份有限公司 Shaped cross-section polyethylene yarn, functional fabric and sweat absorption and quick drying product

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Publication number Priority date Publication date Assignee Title
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TWI836333B (en) * 2021-12-20 2024-03-21 南韓商可隆股份有限公司 Shaped cross-section polyethylene yarn, functional fabric and sweat absorption and quick drying product

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