JP2012144840A - Nonwoven fabric comprising mixed fiber and method for manufacturing the same - Google Patents

Nonwoven fabric comprising mixed fiber and method for manufacturing the same Download PDF

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JP2012144840A
JP2012144840A JP2012106210A JP2012106210A JP2012144840A JP 2012144840 A JP2012144840 A JP 2012144840A JP 2012106210 A JP2012106210 A JP 2012106210A JP 2012106210 A JP2012106210 A JP 2012106210A JP 2012144840 A JP2012144840 A JP 2012144840A
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nonwoven fabric
mixed
polyolefins
fibers
fiber
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JP5602183B2 (en
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Shigeyuki Motomura
茂之 本村
Kenichi Suzuki
健一 鈴木
Akiomi Manabe
顕臣 真鍋
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Mitsui Chemicals Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric which is good in touch and is superior in flexibility, that simultaneously has characteristics of both polyolefins and elastomers, and a method for manufacturing the same.SOLUTION: The nonwoven fabric is formed by entangling through hot emboss processing a nonwoven fabric web which includes a mixed fiber in which a fiber including polyolefines and a fiber including elastomer are mixed and which is formed by melt spinning according to a span bonding method by simultaneously extruding heterogeneous molten polymers including the polyolefins and the elastomer from different nozzles arranged in the same die. A method for manufacturing the same is also provided.

Description

本発明は、ポリオレフィン類からなる繊維とエラストマーからなる繊維が微細に分散されて混合され形成されている不織布及びその製造方法に関する。   The present invention relates to a nonwoven fabric in which fibers made of polyolefin and fibers made of elastomer are finely dispersed and mixed, and a method for producing the same.

近年、不織布はさまざまな用途に使用されてきており、その用途に応じて各種特性の向上が要求される。例えば、紙おむつ、生理用ナプキン等の衛生材料の一部、湿布材の基布等に用いられる不織布は、触感が良く、耐水性があり透湿性に優れることが要求される。また使用される箇所によっては加えて伸縮性も求められる。さらには、衛生材料などを構成する不織布素材間では、接着の際にヒートシール性が求められる。   In recent years, non-woven fabrics have been used for various purposes, and improvements in various properties are required depending on the uses. For example, non-woven fabrics used for sanitary materials such as disposable diapers and sanitary napkins, and base materials for poultices are required to have good tactile sensation, water resistance and excellent moisture permeability. In addition, stretchability is also required depending on the location used. Furthermore, heat-sealability is required between the non-woven fabric materials that constitute sanitary materials and the like during bonding.

これらの特性は、単一のポリマーからなる繊維で構成される不織布では、達成が難しく、たとえば強度と柔軟性を兼ね備えた不織布とするためスパンボンド不織布をバイコンポネーント繊維からなるものとしたり、加えて耐水性を向上させたりするために、メルトブロー不織布を積層することが行われている。また、伸縮性を有し触感にも優れていてべとつきのない不織布とするために、伸縮性素材からなる不織布に、伸長性の不織布を積層することが行われる。そして不織布を積層するためには層間接着性に優れた素材の組み合わせとしなければならなかった。さらには、異種のポリマーからなる不織布同士のヒートシールには、加工が複雑となるホットメルト等による接着工程が必要となる。   These properties are difficult to achieve with a nonwoven fabric composed of fibers made of a single polymer. For example, a spunbond nonwoven fabric composed of bicomponent fibers in order to obtain a nonwoven fabric having both strength and flexibility, In addition, in order to improve water resistance, a melt blown nonwoven fabric is laminated. Moreover, in order to make a non-woven fabric that has stretchability and excellent tactile sensation, a stretchable non-woven fabric is laminated on a non-woven fabric made of a stretchable material. And in order to laminate a nonwoven fabric, it had to be made into the combination of the material excellent in interlayer adhesiveness. Furthermore, in order to heat-seal non-woven fabrics made of different types of polymers, a bonding process using hot melt or the like that complicates processing is required.

また、異なる素材が有している両方の特性を併せ持つ不織布とするために、異種のポリマーからなる長繊維不織布層を積層して、ウォータージェットや、ニードルパンチなどの機械的な交絡を行う方法、あるいは接着剤を用いるケミカルボンドを行う方法がある。機械的な交絡方法では、生産性が落ちるし、得られたウェブの強度、毛羽立ち等、特におむつ等吸収性物品で求められる低目付（３０ｇ／ｍ２以下）に対して実用性がない。ケミカルボンドによる方法では、加工が複雑になるという問題点があった。 In addition, in order to make a nonwoven fabric having both characteristics of different materials, a method of laminating a long-fiber nonwoven fabric layer made of different polymers and performing mechanical entanglement such as water jet or needle punch, Alternatively, there is a method of performing chemical bonding using an adhesive. In the mechanical entanglement method, the productivity is lowered, and there is no practicality with respect to the low weight per unit area (30 g / m 2 or less) required for absorbent articles such as diapers, such as strength and fuzz of the obtained web. The chemical bond method has a problem of complicated processing.

本発明は、ポリオレフィン類とエラストマーとが有している特性を併せ持つ、触感が良く、伸縮性に優れる不織布を提供することを目的とする。   An object of this invention is to provide the nonwoven fabric which has the characteristics which polyolefins and an elastomer have, which is good in touch and excellent in stretchability.

本発明によれば、 本発明によれば、同一ダイに配設された異なるノズルから、ポリオレフィン類とエラストマーからなる異種の溶融ポリマーを同時に押出してスパンボンド法により溶融紡糸し、ポリオレフィン類からなる繊維とエラストマーからなる繊維が混合された混合繊維からなる不織布ウェブに熱エンボス加工により交絡処理を施した不織布が提供される。
が提供される。 According to the present invention, according to the present invention, fibers made of polyolefins are extruded by simultaneously extruding different types of molten polymers made of polyolefins and elastomers from different nozzles arranged on the same die, and by a spunbond method. There is provided a non-woven fabric obtained by subjecting a non-woven web made of a mixed fiber in which fibers made of an elastomer and an elastomer are mixed to each other by hot embossing .
Is provided.

本発明においては、ポリオレフィン類が、ポリエチレンおよびポリプロピレンから選ばれた少なくとも１種であることが好ましい。   In the present invention, the polyolefin is preferably at least one selected from polyethylene and polypropylene.

本発明においては、エラストマーがポリスチレン系エラストマーであることが好ましい。 In the present invention, the elastomer is preferably a polystyrene-based elastomer .

本発明により、同一ダイに配設された異なるノズルから、ポリオレフィン類とエラストマーからなる異種の溶融ポリマーを同時に押出してスパンボンド法により溶融紡糸し、ポリオレフィン類からなる繊維とエラストマーからなる繊維が混合された混合繊維からなる不織布ウェブに熱エンボス加工により交絡処理を施す不織布の製造方法が提供される。
が提供される。 According to the present invention, different types of molten polymers made of polyolefins and elastomers are simultaneously extruded from different nozzles arranged on the same die and melt-spun by the spunbond method, and fibers made of polyolefins and fibers made of elastomers are mixed. A method for producing a nonwoven fabric is provided, in which a nonwoven web composed of mixed fibers is subjected to an entanglement treatment by hot embossing .
Is provided.

また、本発明により、前記の混合繊維からなる不織布を、少なくとも１層有する積層体が提供される。   Moreover, the laminated body which has at least 1 layer of the nonwoven fabric which consists of said mixed fiber is provided by this invention.

本発明の混合繊維からなる不織布は、ポリオレフィン類とエラストマーとが有している特性を併せ持つ不織布となるので、触感が良く、伸縮性に優れる単一層の不織布ができる。本発明の混合繊維からなる不織布を積層した積層体では、ポリオレフィン類とエラストマーとが有している特性を併せ持つ不織布層が介在するので、従来のものよりも柔軟性、耐水性及び層間接着性などに優れた積層不織布が得られる。本発明の混合繊維からなる不織布の製造方法によれば、ポリオレフィン類からなる繊維とエラストマーからなる繊維が微細に分散されて混合されているので、ポリオレフィン類とエラストマーとが有している特性を併せ持つ不織布を得ることができる。   Since the nonwoven fabric made of the mixed fiber of the present invention is a nonwoven fabric having the characteristics of polyolefins and elastomers, a single layer nonwoven fabric having good tactile sensation and excellent stretchability can be obtained. In the laminate in which the nonwoven fabric composed of the mixed fibers of the present invention is laminated, a nonwoven fabric layer having the characteristics of polyolefins and elastomers intervenes, so flexibility, water resistance, interlayer adhesion, etc. than conventional ones A laminated nonwoven fabric excellent in the above can be obtained. According to the method for producing a nonwoven fabric composed of the mixed fibers of the present invention, since the fibers composed of polyolefins and the fibers composed of elastomers are finely dispersed and mixed, it has the characteristics of polyolefins and elastomers. A nonwoven fabric can be obtained.

本発明に係る混合繊維からなる不織布を製造するための、スパンボンド不織布製造装置の一例を示す概略図である。It is the schematic which shows an example of the spun bond nonwoven fabric manufacturing apparatus for manufacturing the nonwoven fabric consisting of the mixed fiber which concerns on this invention. 本発明に係る混合繊維からなる不織布を製造するための、スパンボンド不織布製造ノズルのパターン配置図の部分図例である。It is the example of a partial figure of the pattern arrangement | positioning figure of the spun bond nonwoven fabric manufacturing nozzle for manufacturing the nonwoven fabric consisting of the mixed fiber which concerns on this invention. 本発明に係る混合繊維からなる不織布を製造するための、メルトブロー不織布製造装置の一例を示す概略図である。It is the schematic which shows an example of the melt blown nonwoven fabric manufacturing apparatus for manufacturing the nonwoven fabric consisting of the mixed fiber which concerns on this invention. 本発明に係る混合繊維からなる不織布を製造するための、メルトブロー不織布製造用紡糸口金の断面図の一例（ａ）、及び紡糸口金ノズル部を下方より見た部分平面図の例（ｂ）および（ｃ）である。An example (a) of a cross-sectional view of a spinneret for producing a melt blown nonwoven fabric for producing a nonwoven fabric composed of mixed fibers according to the present invention, and an example (b) of a partial plan view of a spinneret nozzle portion viewed from below ( c).

本発明に係る混合繊維からなる不織布及びその製造方法並びに該不織布からなる積層体について具体的に説明する。
本発明の不織布に用いられる混合繊維は、同一ダイに配設された異なるノズルから、異種の溶融ポリマーを同時に押出して溶融紡糸し、異種のポリマーからなる繊維が混合されたものである。 The nonwoven fabric consisting of the mixed fibers according to the present invention, the production method thereof, and the laminate comprising the nonwoven fabric will be specifically described.
The mixed fiber used in the nonwoven fabric of the present invention is a fiber in which different types of molten polymers are simultaneously extruded and melt-spun from different nozzles arranged on the same die, and fibers made of different types of polymers are mixed.

本発明において、異種のポリマーとは、ポリエチレンやポリプロピレン等のポリオレフィン類と、ポリオレフィン系エラストマー、ポリスチレン系エラストマー、ポリエステル系エラストマーポリアミド系エラストマー及びポリウレタン等のエラストマーからなる組み合せである。   In the present invention, the different polymer is a combination of polyolefins such as polyethylene and polypropylene, and elastomers such as polyolefin elastomer, polystyrene elastomer, polyester elastomer polyamide elastomer and polyurethane.

混合繊維は、スパンボンド法により溶融紡糸されて得られるものが好ましい。また、混合繊維は、メルトブロー法により溶融紡糸されて得られるものが好ましい。以下それぞれについて、説明する。
スパンボンド法による混合繊維の製造においては、ポリオレフィン類とエラストマーから選ばれた２種のポリマーを、別々の押出機等により溶融する。溶融されたポリマーは、同一のダイに導かれ、ダイに設けられた多数のノズルから吐出されて紡糸される。２種類のポリマーは、ダイに配設された異なるノズルから吐出される。このとき、２種類のポリマーの吐出ノズルを、例えば、図２のように配置しておけば、２種類の繊維の混合状態や割合を自由に制御できる。ノズルから吐出されたフィラメントは、高速のエア流により冷却、延伸されて捕集コンベアーに堆積され不織布ウェブが形成される。 The mixed fiber is preferably obtained by melt spinning by a spunbond method. The mixed fiber is preferably obtained by melt spinning by a melt blow method. Each will be described below.
In the production of mixed fibers by the spunbond method, two kinds of polymers selected from polyolefins and elastomers are melted by separate extruders or the like. The melted polymer is guided to the same die, discharged from a number of nozzles provided on the die, and spun. The two types of polymers are discharged from different nozzles disposed on the die. At this time, if two types of polymer discharge nozzles are arranged as shown in FIG. 2, for example, the mixed state and ratio of the two types of fibers can be freely controlled. The filament discharged from the nozzle is cooled and stretched by a high-speed air flow, and deposited on a collecting conveyor to form a nonwoven web.

その後不織布ウェブは交絡処理されてスパンボンド不織布が得られる。交絡処理の方法としては、エンボスロールを用いた熱エンボス加工、超音波による融着、ウォータージェットによる交絡、ホットエアースルーによる繊維の融着、ニードルパンチを用いた交絡などを挙げることができる。   The nonwoven web is then entangled to obtain a spunbond nonwoven. Examples of the entanglement treatment method include heat embossing using an embossing roll, ultrasonic fusion, entanglement using a water jet, fiber fusion using hot air through, and entanglement using a needle punch.

メルトブロー法による混合繊維の製造においては、ポリオレフィン類とエラストマーから選ばれた２種のポリマーを、別々の押出機等により溶融する。溶融されたポリマーは、同一のメルトブローダイに導かれ、ダイに設けられ一列に並んだ多数のノズルから空気の二つの収束する高速加熱気流中に吐出されて紡糸される。２種類のポリマーは、ダイに配設された異なるノズルから吐出される。このとき、２種類のポリマーの吐出ノズルを、例えば、図４のように配置しておけば、２種類の繊維の混合状態や割合を自由に制御できる。ノズルから吐出されたマイクロファイバーは、捕集スクリーン上に堆積されメルトブロー不織布が得られる。メルトブロー不織布の場合にも、必要に応じて、後工程で交絡処理を施しても良い。   In the production of mixed fibers by the melt blow method, two kinds of polymers selected from polyolefins and elastomers are melted by separate extruders or the like. The melted polymer is guided to the same melt blow die, and discharged from two or more nozzles arranged in a row in the die into two converging high-speed heated air streams of air to be spun. The two types of polymers are discharged from different nozzles disposed on the die. At this time, if two types of polymer discharge nozzles are arranged as shown in FIG. 4, for example, the mixed state and ratio of the two types of fibers can be freely controlled. Microfibers discharged from the nozzle are deposited on a collection screen to obtain a melt blown nonwoven fabric. Also in the case of a melt blown nonwoven fabric, an entanglement process may be performed in a subsequent process, if necessary.

伸長性素材となるポリエチレンやポリプロピレンと伸縮性素材となるエラストマーとを用いた混合繊維からなる不織布を製造すれば、伸縮性に優れる単一層の不織布が得られる。   If a non-woven fabric made of mixed fibers using polyethylene or polypropylene as an extensible material and an elastomer as an elastic material is produced, a single-layer non-woven fabric having excellent elasticity can be obtained.

このように本発明の不織布は、従来得られなかった特性を併せ持つ単一層の不織布並びに積層体が得られる。そして、積層体の層間接着性の良い素材の組み合せに対する自由度も増え、これにより、不織布の飛躍的な用途の拡大が期待されるものである。   Thus, the nonwoven fabric of this invention can obtain the single layer nonwoven fabric and laminated body which have the characteristic which was not obtained conventionally. And the freedom degree with respect to the combination of a raw material with good interlayer adhesiveness of a laminated body also increases, and, thereby, the expansion of the use of a nonwoven fabric is anticipated.

以下、本発明を実施例により説明する。実施例および比較例で用いた破断伸度、１００％伸長後の歪の測定は、以下の方法により行った。   Hereinafter, the present invention will be described with reference to examples. Measurement of elongation at break and strain after 100% elongation used in Examples and Comparative Examples were performed by the following methods.

（１）破断伸度
ＪＩＳ Ｌ１９０６に準拠し、幅５０ｍｍ、長さ２００ｍｍの試験片について引張試験機を用いて、室温下、チャック間隔１００ｍｍ、引張速度１００ｍｍ／分で測定した。
（２）１００％伸長後の歪
上記（１）の引張試験と同様の条件で引張り、伸度１００％まで伸長させた後、同じ速度で戻し、応力が０となったときの伸び率を歪として求めた。 (1) Elongation at break According to JIS L1906, a test piece having a width of 50 mm and a length of 200 mm was measured with a tensile tester at a room temperature, a chuck interval of 100 mm, and a tensile speed of 100 mm / min.
(2) Strain after 100% elongation After pulling under the same conditions as in the tensile test of (1) above, stretching to 100% elongation, returning at the same speed, the strain when the stress becomes zero is strained. As sought.

（実施例１）
ＭＦＲ（ＡＳＴＭ Ｄ１２３８準拠し温度２３０℃、荷重２．１６ｋｇで測定）６０ｇ／１０分、密度０．９１ｇ／ｃｍ３、融点１６０℃のプロピレンホモポリマー９５重量部と、ＭＦＲ（ＡＳＴＭ Ｄ１２３８準拠し温度１９０℃、荷重２．１６ｋｇで測定）５ｇ／１０分、密度０．９７ｇ／ｃｍ３、融点１３４℃の高密度ポリエチレン５重量部との混合物と、ＳＥＢＳ（スチレン・エチレン・ブチレン・スチレンブロック共重合体、旭化成（株）製タフテックＴＭ１０５２）とを原料とし、同一ダイに配設された異なるノズルから、それぞれ繊維Ａおよび繊維Ｂとして、スパンボンド法により樹脂温度、ダイ温度とも２００℃、冷却風温度２０℃、延伸エア風速４０００ｍ／分で溶融紡糸した。 Example 1
MFR (according to ASTM D1238, temperature 230 ° C., measured at load 2.16 kg) 60 g / 10 min, density 0.91 g / cm 3 , melting point 160 ° C. 95 parts by weight of propylene homopolymer, MFR (according to ASTM D1238, temperature 190 SEBS (styrene / ethylene / butylene / styrene block copolymer) and a mixture of 5 parts by weight of high density polyethylene having a density of 0.97 g / cm 3 and a melting point of 134 ° C. Asahi Kasei's Tuftec ™ 1052), from different nozzles arranged in the same die, fiber A and fiber B were respectively made by the spunbond method with both resin temperature and die temperature of 200 ° C., cooling air temperature Melt spinning was performed at 20 ° C. and a drawing air speed of 4000 m / min.

その際、紡糸口金の繊維Ａおよび繊維Ｂのノズル配置パターンは図２（ｂ）（ノズルのピッチは縦方向８ｍｍ、横方向９ｍｍ）であり、ノズル径０．６ｍｍφ、ノズル数の比は繊維Ａ：繊維Ｂ＝３：１とし、繊維Ａの単孔吐出量０．６ｇ／分／孔、繊維Ｂの単孔吐出量０．８ｇ／分／孔とした。得られたフィラメント径の平均値から、繊維速度は、繊維Ａが１５００ｍ／分、繊維Ｂが８００ｍ／分であった。ウェブフォーマー速度を３０ｍ／分とし、１２０℃でエンボス加工（エンボス面積率：７％、刻印ピッチ：縦方向および横方向２．１ｍｍ、刻印形状：ひし形）を行って、目付３０ｇ／ｍ２のスパンボンド不織布を製造した。得られたスパンボンド不織布の測定結果を表１に示す。 At that time, the nozzle arrangement pattern of the fibers A and B of the spinneret is FIG. 2B (the nozzle pitch is 8 mm in the vertical direction and 9 mm in the horizontal direction), the nozzle diameter is 0.6 mmφ, and the ratio of the number of nozzles is the fiber A : Fiber B = 3: 1, single hole discharge rate of fiber A 0.6 g / min / hole, single hole discharge rate of fiber B 0.8 g / min / hole. From the average value of the filament diameters obtained, the fiber speed was 1500 m / min for fiber A and 800 m / min for fiber B. The web former speed is 30 m / min, and embossing is performed at 120 ° C. (embossing area ratio: 7%, marking pitch: vertical and horizontal directions 2.1 mm, stamping shape: rhombus), and the basis weight is 30 g / m 2 . A spunbond nonwoven was produced. Table 1 shows the measurement results of the obtained spunbonded nonwoven fabric.

（比較例）
ＳＥＢＳ原料を使用せず、すべてプロピレンホモポリマー９５重量部と、高密度ポリエチレン５重量部との混合物を用いた繊維Ａとした以外は、実施例１と同様にして、目付２８ｇ／ｍ２のスパンボンド不織布を製造した。得られたスパンボンド不織布の測定結果を表１に示す。 (Comparative example)
A span with a weight per unit area of 28 g / m 2 was obtained in the same manner as in Example 1 except that no fiber was used and a SEB raw material was used, and a mixture of 95 parts by weight of propylene homopolymer and 5 parts by weight of high-density polyethylene was used. A bonded nonwoven fabric was produced. Table 1 shows the measurement results of the obtained spunbonded nonwoven fabric.

Figure 2012144840
実施例のスパンボンド不織布は、積層によらないでも十分な伸縮性を示した。
Figure 2012144840
 The spunbonded nonwoven fabric of the example exhibited sufficient stretchability even without lamination.

１ 押出機
１’ １とは異種のポリマー用押出機
２ 紡糸口金
３ 連続フィラメント
４ 冷却風
５ エジェクター
６ 捕集装置
７ 吸引
８ ウェブ
９ 交絡処理
１０ 巻き取りロール
１１ スパンボンド不織布溶融紡糸用ポリマーのノズル
１２ １１とは異種のスパンボンド不織布溶融紡糸用ポリマーのノズル
１３ 押出機
１３’ １３とは異種のポリマー用押出機
１４ 高圧加熱空気流入口
１５ 紡糸口金
１６ マイクロファイバー
１７ 捕集装置
１８ ウェブ
１９ 溶融ポリマーの流入口
２０ １９とは異種の溶融ポリマーの流入口
２１ マニホールド
２２ エアホルダー
２３ エアの流れ
２４ マイクロファイバー
２５ メルトブロー不織布溶融紡糸用ポリマーのノズル
２６ ２５とは異種のメルトブロー不織布溶融紡糸用ポリマーのノズル DESCRIPTION OF SYMBOLS 1 Extruder 1 'Extruder for polymers different from 1 2 Spinneret 3 Continuous filament 4 Cooling air 5 Ejector 6 Collection device 7 Suction 8 Web 9 Entangling process 10 Winding roll 11 Spunbond nonwoven melt spinning polymer nozzle 12 11 Nozzle of spunbonded nonwoven fabric different from 11 13 Extruder 13 ′ Extruder for polymer different from 13 13 High-pressure heated air inlet 15 Spinner cap 16 Microfiber 17 Collection device 18 Web 19 Melted polymer Different melt polymer inlets 21 19 Manifold 22 Air holder 23 Air flow 24 Microfiber 25 Melt blown nonwoven melt spinning polymer nozzles 26 25 Different melt blown nonwoven melt spinning polymer nozzles

Claims (5)

同一ダイに配設された異なるノズルから、ポリオレフィン類とエラストマーからなる異種の溶融ポリマーを同時に押出してスパンボンド法により溶融紡糸し、ポリオレフィン類からなる繊維とエラストマーからなる繊維が混合された混合繊維からなる不織布ウェブに熱エンボス加工により交絡処理を施した不織布。 From different nozzles arranged on the same die, different types of molten polymers composed of polyolefins and elastomers are extruded at the same time and melt-spun by the spunbond method . From mixed fibers in which fibers composed of polyolefins and fibers composed of elastomers are mixed The nonwoven fabric which gave the entanglement process to the nonwoven fabric web which becomes by hot embossing . ポリオレフィン類が、ポリエチレンおよびポリプロピレンから選ばれた少なくとも１種である請求項１に記載の不織布。   The nonwoven fabric according to claim 1, wherein the polyolefin is at least one selected from polyethylene and polypropylene. 前記エラストマーが、ポリスチレン系エラストマーである請求項１に記載の不織布。 The nonwoven fabric according to claim 1, wherein the elastomer is a polystyrene-based elastomer . 同一ダイに配設された異なるノズルから、ポリオレフィン類とエラストマーからなる異種の溶融ポリマーを同時に押出してスパンボンド法により溶融紡糸し、ポリオレフィン類からなる繊維とエラストマーからなる繊維が混合された混合繊維からなる不織布ウェブに熱エンボス加工により交絡処理を施す不織布の製造方法。 From different nozzles arranged on the same die, different types of molten polymers composed of polyolefins and elastomers are extruded at the same time and melt-spun by the spunbond method. From mixed fibers in which fibers composed of polyolefins and fibers composed of elastomers are mixed The manufacturing method of the nonwoven fabric which performs the entanglement process by hot embossing to the nonwoven fabric web which becomes. 請求項１〜３のいずれかに記載の混合繊維からなる不織布を、少なくとも１層有する積層体。   The laminated body which has at least 1 layer of the nonwoven fabric which consists of mixed fiber in any one of Claims 1-3.
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