JPH11256464A - Nonwoven fabric, its production and absorbing article using the same - Google Patents

Nonwoven fabric, its production and absorbing article using the same

Info

Publication number
JPH11256464A
JPH11256464A JP10370028A JP37002898A JPH11256464A JP H11256464 A JPH11256464 A JP H11256464A JP 10370028 A JP10370028 A JP 10370028A JP 37002898 A JP37002898 A JP 37002898A JP H11256464 A JPH11256464 A JP H11256464A
Authority
JP
Japan
Prior art keywords
nonwoven fabric
fiber
fibers
suction
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10370028A
Other languages
Japanese (ja)
Other versions
JP4110651B2 (en
Inventor
Shigenori Fukuda
重則 福田
Osamu Yamaguchi
修 山口
Daisuke Masuda
大介 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JNC Corp
Original Assignee
Chisso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chisso Corp filed Critical Chisso Corp
Priority to JP37002898A priority Critical patent/JP4110651B2/en
Publication of JPH11256464A publication Critical patent/JPH11256464A/en
Application granted granted Critical
Publication of JP4110651B2 publication Critical patent/JP4110651B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Absorbent Articles And Supports Therefor (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a nonwoven fabric suitable for an absorbing particle having flexibility and excellent touch to the skin, composed of a thermoplastic yarn, comprising one face of rough and hard uneven face and the other of a smooth face, by thermally bonding contact points of constituent yarns. SOLUTION: At least two kinds of thermoplastic resins of a polypropylene and a high-density polyethylene or the like having >=10 deg.C difference in melting point are spun by using a spinning nozzle for conjugate yarn and melt blow equipment provided with a cylindrical body or a moving conveyor having a smooth face in the middle of the spinning nozzle and a suction drum or a suction conveyor to give the objective nonwoven fabric which comprises one face of an uneven face A and the other of a smooth face B, in which yarns dispersed in the face B is arranged mainly in a machine direction, its average angle of orientation is <=30 degrees, yarns dispersed in the face A are randomly dispersed, its average angle of orientation is larger than that of the face B by >=15 degrees, the ratio of rough hardness A/B is >=1.5 and an average friction deviation ratio A/B is >=2.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、吸収性物品に好適
な熱可塑性繊維からなる不織布及びその製造方法ならび
にそれを用いた吸収性物品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric made of thermoplastic fiber suitable for an absorbent article, a method for producing the same, and an absorbent article using the same.

【０００２】[0002]

【従来の技術】紙おむっや生理用ナプキン等の吸収性物
品を構成する材料には、使用される部分に応じて、通気
性、撥水性、不織布強力、肌触り等の諸特性が要求され
る。これらの要求に応じて熱可塑性繊維からなる様々な
不織布（例えばスパンボンド不織布やメルトブロー不織
布等）が使われている。吸収性物品は、各種不織布や多
孔性フィルム等を組み合わせることにより製造される。2. Description of the Related Art Materials constituting absorbent articles such as paper diapers and sanitary napkins are required to have various properties such as breathability, water repellency, strong nonwoven fabric, and softness, depending on the parts used. . Various nonwoven fabrics made of thermoplastic fibers (for example, spunbonded nonwoven fabrics and meltblown nonwoven fabrics) have been used according to these requirements. Absorbent articles are manufactured by combining various nonwoven fabrics, porous films, and the like.

【０００３】メルトブロー不織布は、細い径の繊維から
なるために、通気性及び接水性の要求される用途に適し
ており、また柔軟性があるという特徴を持っている。―
方、メルトブロー不織布は、繊維同士の接着が弱いた
め、繊維の落脱が起こり易い、不織布強力が弱い等の問
題がある。したがって、これを吸収性物品に使用する場
合、単独では破れ易く、肌と接触する部分に使用すると
毛羽立つ、肌触りが悪いといった問題がある。繊維の落
脱を少なくしたり、強力を上げるために、メルトブロー
不織布を加熱したカレンダーロールでプレスする方法も
ある。しかし、この場合、不織布の表面を滑らかにする
ことはできるが、不織布の嵩が減り、硬くなる（柔軟性
が低下する）ため、風合いが低下し、結果的に皮膚に対
する感触が悪くなってしまうという問題がある。[0003] Melt blown nonwoven fabrics are characterized by being suitable for applications requiring air permeability and water contact because they are made of fibers having a small diameter, and are flexible. ―
On the other hand, the melt-blown nonwoven fabric has problems such as easy detachment of fibers and weak strength of the nonwoven fabric due to weak adhesion between fibers. Therefore, when this is used for an absorbent article, there is a problem in that it is easily broken by itself, and when used in a portion that comes into contact with the skin, it becomes fluffy and has a poor feel. There is also a method in which a melt-blown nonwoven fabric is pressed with a heated calender roll in order to reduce the loss of fibers and increase the strength. However, in this case, although the surface of the nonwoven fabric can be made smooth, the bulk of the nonwoven fabric is reduced and the nonwoven fabric becomes hard (decreased in flexibility), so that the texture is reduced, and as a result, the feel to the skin is deteriorated. There is a problem.

【０００４】上記問題点を解決するために、メルトブロ
ー不織布の片面または両面にスパンボンド不織布を貼り
合わせて使用することが一般的に行われている。しか
し、貼り合わせにより得られる不織布は、紡糸後の後工
程でエンボスロールによる熱圧着加工を行うことにより
製造されるため、単一の不織布を製造する場合に比べ、
それを製造するための設備投資が非常に掛かるという問
題がある。本発明の類似の先行技術は、特開平８−２２
４４１２に記載されている。この文献には、メルトブロ
ー紡糸口金から熱可塑性樹脂を噴射させる際に、口金下
の鉛直方向から回転中心をオフセットした捕集ドラムに
向け噴射し、そのメルトブロー繊維流の中心線を口金下
の鉛直方向に対して１０〜３０度に傾斜させ、またその
中心線が捕集ドラムと交差する点での捕集ドラム上の接
線に対して５〜２０度にして捕集ドラム上に捕集するこ
とにより、全繊維本数の少なくとも５０％が束上に接合
した繊維束であり、該繊維束が実質的に一方向に配列し
ている不織布を製造することが開示されている。この文
献に開示された製造方法では、フィルターなどの用途に
使用可能な剛性が改善された不織布が得られる。しか
し、使い捨ておむつや生理用ナプキン等の吸収性物品に
使用できるように、不織布の片面を滑らかにして肌触り
を良くすることについての開示はない。[0004] In order to solve the above problems, it is common practice to bond a spunbonded nonwoven fabric to one or both sides of a meltblown nonwoven fabric. However, since the nonwoven fabric obtained by lamination is manufactured by performing thermocompression bonding using an embossing roll in a later process after spinning, compared to the case of manufacturing a single nonwoven fabric,
There is a problem that capital investment for manufacturing it is very expensive. A similar prior art of the present invention is disclosed in JP-A-8-22.
4412. According to this document, when injecting a thermoplastic resin from a melt-blow spinning nozzle, the thermoplastic resin is injected toward a collection drum whose rotation center is offset from a vertical direction under the die, and the center line of the melt-blow fiber flow is set in a vertical direction under the die. To the tangent on the collection drum at the point where the center line intersects with the collection drum at 5 to 20 degrees with respect to the collection drum. It is disclosed that at least 50% of the total number of fibers is a fiber bundle bonded on a bundle, and a nonwoven fabric in which the fiber bundle is arranged substantially in one direction. According to the production method disclosed in this document, a nonwoven fabric with improved rigidity that can be used for applications such as a filter is obtained. However, there is no disclosure about smoothing one side of the nonwoven fabric to improve the feel so that it can be used for absorbent articles such as disposable diapers and sanitary napkins.

【０００５】[0005]

【発明が解決しようとする課題】本発明は、不織布強力
が高く、柔軟性と肌触り感が良く、毛羽立ちのない不織
布及びその不織布の製造方法、更に、それを用いた吸収
性物品を提供することを課題とする。DISCLOSURE OF THE INVENTION The present invention provides a nonwoven fabric which has high strength of a nonwoven fabric, has good softness and softness, and has no fluff, a method for producing the nonwoven fabric, and an absorbent article using the same. As an issue.

【０００６】[0006]

【課題を解決するための手段】本発明者らは、上記課題
を解決するべく鋭意研究を重ねた結果、以下の構成を採
用することにより、所期の目的が達成される見通しを得
て、本発明を完成するに至った。本発明は以下の構成を
有する。 （１）熱可塑性樹脂からなる繊維で構成される不織布で
あって、該不織布は一方の面は粗硬な凹凸面（Ａ）を形
成し、他方の面は平滑面（Ｂ）であり、かつ該不織布の
繊維接点が熱接着されていることを特徴とする不織布。 （２）前記凹凸面（Ａ）と平滑面（Ｂ）が、粗硬度比Ａ
／Ｂ≧１．５である（１）に記載の不織布。 （３）前記凹凸面（Ａ）と平滑面（Ｂ）が、平均摩擦偏
差比Ａ／Ｂ≧２である（１）または（２）に記載の不織
布。 （４）不織布の平滑面（Ｂ）に分散する繊維が、主とし
て機械方向（ＭＤ方向）に配列し、その平滑面（Ｂ）の
平均配向角度が３０度以下である（１）〜（３）のいず
れかに記載の不織布。 （５）不織布の粗硬な凹凸面（Ａ）に分散する繊維が、
ランダム分散配列している（１）〜（３）のいずれかに
記載の不織布。 （６）不織布の粗硬な凹凸面（Ａ）に分散する繊維の平
均配向角度が、平滑面（Ｂ）の平均配向角度より、少な
くとも１５度以上大きい（１）〜（５）のいずれかに記
載の不織布。 （７）不織布の機械方向（ＭＤ方向）／横方向（ＣＤ方
向）の強度比が、少なくとも１．３である（１）〜
（６）のいずれかに記載の不織布。 （８）不織布を構成する熱可塑性樹脂からなる繊維が、
１０℃以上の融点差を有する少なくとも２種の熱可塑性
樹脂からなる複合繊維である、（１）〜（７）のいずれ
かに記載の不織布。 （９）不織布を構成する熱可塑性樹脂からなる繊維が、
１０℃以上の融点差を有する少なくとも２種の熱可塑性
樹脂からなる混織繊維である、（１）〜（７）のいずれ
かに記載の不織布。 （１０）不織布が、メルトブロー不織布である（１）〜
（９）のいずれかに記載の不織布。 （１１） （１）〜（１０）のいずれかに記載の不織布
を―部に用いた吸収性物品。 （１２）少なくとも１種の熱可塑性樹脂成分を溶融して
紡糸ノズルから吐出させ繊維とし、該繊維をサクション
ドラム上またはサクションコンべア上に堆積捕集して繊
維集合体とし、続いて熱処理により該繊維集合体を構成
する該繊維の接点を熱接着させる不織布の製造方法にお
いて、紡糸ノズルとサクションドラムまたはサクション
コンべアとの中間に平滑な表面を有し回転する円筒体ま
たは平滑な表面を有する回転移動コンべアを設置し、紡
糸ノズルから吐出された繊維の少なくとも一部をを半固
化状態のうちに該回転する円筒体または該回転移動コン
べアの表面に接触させてから前記サクションドラムまた
はサクションコンべア上に移動捕集させることを特徴と
する（１）項に記載の不織布の製造方法。 （１３）少なくとも１種の熱可塑性樹脂成分を溶融して
紡糸ノズルから吐出させ繊維とし、該繊維をサクション
ドラム上またはサクションコンべア上に堆積捕集して繊
維集合体とし、続いて熱処理により該繊維集合体を構成
する該繊維の接点を熱接着させる不織布の製造方法にお
いて、紡糸ノズルとサクションドラムまたはサクション
コンべアとの間に平滑な表面を有し回転する円筒体また
は平滑な表面を有する回転移動コンべアを設置し、紡糸
ノズルから吐出された繊維の一部を少なくとも半固化状
態のうちに該回転する円筒体または該回転移動コンべア
の表面に接触させてから前記サクションドラムまたはサ
クションコンべア上に捕集して繊維集合体（Ｂ’）と
し、前記紡糸ノズルから同時に吐出された繊維の残部を
直接前記サクションドラム上またはサクションコンべア
上に捕集して、該繊維集合体（Ａ’）として移動させ、
前記繊維集合体（Ａ’）と（Ｂ’）とを合流積層させた
後、積層された繊維集合体に熱処理を行うことを特徴と
する（１）項に記載の不織布の製造方法。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, by adopting the following configuration, the prospect of achieving the intended object has been obtained. The present invention has been completed. The present invention has the following configuration. (1) A nonwoven fabric composed of fibers made of a thermoplastic resin, wherein the nonwoven fabric has a rough uneven surface (A) on one surface, a smooth surface (B) on the other surface, and A nonwoven fabric, wherein the fiber contacts of the nonwoven fabric are thermally bonded. (2) The uneven surface (A) and the smooth surface (B) have a coarse hardness ratio A
The nonwoven fabric according to (1), wherein /B≧1.5. (3) The nonwoven fabric according to (1) or (2), wherein the uneven surface (A) and the smooth surface (B) have an average friction deviation ratio A / B ≧ 2. (4) The fibers dispersed on the smooth surface (B) of the nonwoven fabric are mainly arranged in the machine direction (MD direction), and the average orientation angle of the smooth surface (B) is 30 degrees or less (1) to (3). The nonwoven fabric according to any one of the above. (5) The fibers dispersed on the rough and uneven surface (A) of the nonwoven fabric are:
The nonwoven fabric according to any one of (1) to (3), which is randomly distributed. (6) Any one of (1) to (5), wherein the average orientation angle of the fibers dispersed on the rough and uneven surface (A) of the nonwoven fabric is at least 15 degrees larger than the average orientation angle of the smooth surface (B). The described nonwoven fabric. (7) The strength ratio of the nonwoven fabric in the machine direction (MD direction) / lateral direction (CD direction) is at least 1.3.
The nonwoven fabric according to any one of (6). (8) Fibers made of a thermoplastic resin constituting the nonwoven fabric,
The nonwoven fabric according to any one of (1) to (7), which is a composite fiber made of at least two kinds of thermoplastic resins having a melting point difference of 10 ° C or more. (9) Fibers made of a thermoplastic resin constituting the nonwoven fabric,
The nonwoven fabric according to any one of (1) to (7), which is a mixed woven fiber composed of at least two kinds of thermoplastic resins having a melting point difference of 10 ° C or more. (10) The nonwoven fabric is a meltblown nonwoven fabric (1) to
The nonwoven fabric according to any one of (9). (11) An absorbent article using the nonwoven fabric according to any one of (1) to (10) for the-part. (12) At least one kind of thermoplastic resin component is melted and discharged from a spinning nozzle to produce fibers, and the fibers are deposited and collected on a suction drum or a suction conveyor to form a fiber aggregate, which is subsequently heat-treated. In a method for producing a nonwoven fabric for thermally bonding the contact points of the fibers constituting the fiber assembly, a rotating cylindrical body or a smooth surface having a smooth surface between a spinning nozzle and a suction drum or a suction conveyor is provided. Installing a rotary moving conveyor having at least a part of the fibers discharged from the spinning nozzle in a semi-solid state, in contact with the rotating cylindrical body or the surface of the rotary moving conveyor, and then performing the suction. The method for producing a nonwoven fabric according to item (1), wherein the nonwoven fabric is moved and collected on a drum or a suction conveyor. (13) At least one thermoplastic resin component is melted and discharged from a spinning nozzle to produce fibers, and the fibers are deposited and collected on a suction drum or a suction conveyor to form a fiber aggregate, which is then subjected to a heat treatment. In a method for producing a nonwoven fabric for thermally bonding the contact points of the fibers constituting the fiber assembly, a rotating cylindrical body or a smooth surface having a smooth surface between a spinning nozzle and a suction drum or a suction conveyor is provided. A rotary moving conveyor having a part of the fibers discharged from the spinning nozzle and contacting the rotating cylindrical body or the surface of the rotary moving conveyor in at least a semi-solid state, and then the suction drum. Alternatively, the fiber is collected on a suction conveyor to form a fiber aggregate (B '), and the remainder of the fibers simultaneously discharged from the spinning nozzle is directly discharged to the suction conveyor. Collected on a ram or on a suction conveyor and moved as the fiber aggregate (A '),
The method for producing a nonwoven fabric according to item (1), wherein after the fiber aggregates (A ′) and (B ′) are merged and laminated, a heat treatment is performed on the laminated fiber aggregates.

【０００７】[0007]

【発明の実施の形態】以下、本発明について詳細に説明
する。本発明は、熱可塑性繊維からなる不織布の一方の
面を滑らかにして毛羽立ちをなくし、他方の面に凹凸を
持たせることで、滑らかな面による肌触り感の向上と凹
凸面による柔軟性の向上を同時に実現させ、かつ充分な
強度を有する不織布である。本発明の不織布を吸収性物
品等に使用する場合、皮膚に対する感触を著しく向上さ
せることができる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The present invention provides a nonwoven fabric made of thermoplastic fiber, which has a smooth surface to eliminate fluff and has a rough surface on the other surface, so that the smooth surface improves the feel of touch and the uneven surface improves flexibility. It is a nonwoven fabric which is realized at the same time and has sufficient strength. When the nonwoven fabric of the present invention is used for an absorbent article or the like, the feel to the skin can be significantly improved.

【０００８】本発明の不織布を形成する熱可塑性樹脂か
らなる繊維は、不織布を製造する際に繊維接点が熱接着
できるものであれば、特に限定されるものではない。該
繊維の具体的な態様としては、単一の成分から紡糸され
たモノコンポーネント繊維、１０℃以上の融点差を有す
る少なくとも２種の熱可塑性樹脂を複合紡糸した複合繊
維が挙げられる。複合繊維の形態としては、高融点樹脂
を芯側、低融点樹脂を鞘側とした鞘芯型または偏芯鞘芯
型、高融点樹脂と低融点樹脂を並列に紡糸した並列型が
挙げられる。更にまた、高融点樹脂からなる繊維と低融
点樹脂からなる繊維が各々独立して存在する混織繊維も
挙げられる。上記繊維が混織繊維の場合、混織繊維中に
前記複合繊維が混合したものも用いることができる。こ
れらの繊維を使用して不織布とする場合、スルーエアー
型ドライヤーにより熱処理を行うことで、いずれの繊維
も風合いを損なうことなく繊維接点を熱接着でき、繊維
落脱や毛羽立ちを防止した不織布を得ることができる。[0008] The fibers comprising the thermoplastic resin forming the nonwoven fabric of the present invention are not particularly limited as long as the fiber contacts can be thermally bonded at the time of producing the nonwoven fabric. Specific examples of the fiber include a monocomponent fiber spun from a single component and a composite fiber obtained by composite-spinning at least two kinds of thermoplastic resins having a melting point difference of 10 ° C. or more. Examples of the form of the conjugate fiber include a sheath-core type or an eccentric sheath-core type having a high-melting-point resin on the core side and a low-melting-point resin on the sheath side, and a parallel type in which a high-melting-point resin and a low-melting-point resin are spun in parallel. Still further, a mixed woven fiber in which a fiber made of a high melting point resin and a fiber made of a low melting point resin are present independently of each other may be used. When the above-mentioned fiber is a mixed fiber, a mixture of the mixed fiber and the mixed fiber can also be used. When these fibers are used as a nonwoven fabric, by performing a heat treatment with a through-air dryer, any fibers can be thermally bonded to the fiber contacts without impairing the texture, and a nonwoven fabric that prevents fiber dropout and fluffing is obtained. be able to.

【０００９】本発明に用いられる熱可塑性樹脂の例とし
ては、ポリプロピレン、ポリエチレン、ポリ−４−メチ
ルぺンテン、プロピレンと他のα−オレフィンとの２元
または３元共重合体、ポリエチレンテレフタレート、ポ
リブチレンテレフタレート、ポリアミド、ポリカーボネ
ート等の熱可塑性樹脂が挙げられる。複合繊維または混
織繊維とする場合の組み合わせとしては、これらの中か
ら、その融点差が１０℃以上、好ましくは１５℃以上に
なるような樹脂を適宜選択することができる。更には、
上に例示した種種の態様の繊維を用いて不織布を製造す
る場合、不織布の片方の面の繊維の並びをＭＤ方向に揃
えることで、一方向に不織布強度が必要とされる用途に
も適した不織布とすることができる。これら各々の複合
繊維や混織繊維から製造される不織布としては、メルト
ブロー紡糸法により製造されたものが好適である。Examples of the thermoplastic resin used in the present invention include polypropylene, polyethylene, poly-4-methylpentene, a binary or tertiary copolymer of propylene and another α-olefin, polyethylene terephthalate, and poly (ethylene terephthalate). Thermoplastic resins such as butylene terephthalate, polyamide, and polycarbonate are exemplified. As a combination in the case of a conjugate fiber or a mixed woven fiber, a resin having a melting point difference of 10 ° C. or more, preferably 15 ° C. or more can be appropriately selected from these. Furthermore,
When fabricating a nonwoven fabric using the fibers of the various embodiments exemplified above, by aligning the fibers on one side of the nonwoven fabric in the MD direction, it is also suitable for applications where nonwoven fabric strength is required in one direction. It can be a non-woven fabric. As the nonwoven fabric produced from each of these conjugate fibers or mixed woven fibers, those produced by melt blow spinning are suitable.

【００１０】高融点樹脂と低融点樹脂の複合比もしくは
混織比は、好ましくは８０：２０から２０：８０であ
る。低融点樹脂が少ないと繊維同士の熱接着点が少なく
なり、充分な強度が得られなくなる傾向がある。また、
逆に低融点樹脂が多いと、繊維同士を接着するための熱
処理時に溶ける量が多くなることで溶けた樹脂が集ま
り、繊維径が太い部分と細い部分が現れて繊維径に斑が
生じ、肌触りが悪くなる傾向がある。上記の比のうちよ
り好ましい範囲は、７０：３０から３０：７０である。[0010] The composite ratio or blend ratio of the high melting point resin and the low melting point resin is preferably from 80:20 to 20:80. When the amount of the low melting point resin is small, the number of heat bonding points between the fibers decreases, and sufficient strength tends not to be obtained. Also,
Conversely, if there is a large amount of low-melting resin, the amount of resin that melts during the heat treatment for bonding the fibers will increase, and the melted resin will collect.Thus, the fiber diameter will appear thicker and thinner, causing unevenness in the fiber diameter, Tend to be worse. A more preferred range of the above ratios is from 70:30 to 30:70.

【００１１】本発明の不織布の製造方法については、添
付した図面（図１）にその一例を示す。本発明において
不織布の一方の片面を他方の片面より平滑にする方法と
しては、例えばメルトブロー紡糸法、フラッシュ紡糸法
等により不織布を得る際に、紡糸ノズル１と繊維を捕集
するサクションコンべア４（これは、サクションドラム
でもかまわない。以下「サクションコンべア等」と記
す）との中間に、平滑面を有する回転する円筒体２（こ
れは平滑面を有する回転移動コンべアでもかまわない。
以下「円筒体等」と記す）を設置し、この面に紡糸され
た繊維４を半固化状態のときに直接当てて接触させた後
に、下方のサクションコンべア等４の上に繊維を移動捕
集させることで不織布の片面を平滑にすることができ
る。ここで、紡糸ノズル１から出た半固化状態の繊維５
は、該円筒体等２の表面に接触させることでこの表面上
に一旦堆積され、半ば不織布を形成した状態となる。こ
の状態では繊維の接点はまだ完全に熱接着されてはいな
い。この半ば不織布状の繊維は、該円筒体等を回転させ
ることにより下方のサクションコンべア等４の上に移動
捕集され、さらに熱処理装置７に送られて繊維の接点が
熱接着された不織布となる。この場合、重要なことは、
紡糸直後の繊維が半固化状態のときに該円筒体ヘの接触
を行うことである。繊維の固化が進んでから接触させた
場合、不織布の片面を平滑面（Ｂ）に形成するのが難し
い。紡糸ノズルから出てきた繊維が半固化状態になる紡
糸法であれば本発明を実施することができるが、好まし
い態様として例えばメルトブロー法やフラッシュ紡糸法
を挙げることができ、その中でもメルトブロー法は特に
好ましい態様である。該円筒体等の表面を金属ロールや
金属べルト等の平滑な面で構成することで、この面に当
たった繊維は、片側が平滑な面を持った不織布状態とな
って固化する。そのため、次にサクションコンべア等に
捕集された後も、平滑な面を保持しているのである。An example of the method for producing a nonwoven fabric of the present invention is shown in the attached drawing (FIG. 1). In the present invention, as one method for making one side of the nonwoven fabric smoother than the other side, for example, when a nonwoven fabric is obtained by a melt blow spinning method, a flash spinning method or the like, a spinning nozzle 1 and a suction conveyor 4 for collecting fibers are used. (This may be a suction drum; hereinafter, referred to as a "suction conveyor or the like"), and a rotating cylindrical body 2 having a smooth surface (this may be a rotary moving conveyor having a smooth surface). .
(Hereinafter referred to as a "cylindrical body"), and the spun fiber 4 is directly brought into contact with this surface in a semi-solid state to make contact therewith, and then the fiber is moved onto the lower suction conveyor 4 and the like. By collecting, one surface of the nonwoven fabric can be smoothed. Here, the semi-solidified fiber 5 coming out of the spinning nozzle 1
Is brought into contact with the surface of the cylindrical body or the like 2 to be temporarily deposited on this surface, thereby forming a semi-woven fabric. In this state, the fiber contacts have not yet been completely thermally bonded. The semi-nonwoven fabric is moved and collected on a suction conveyor or the like 4 below by rotating the cylindrical body or the like, and further sent to a heat treatment device 7 where the contact points of the fibers are thermally bonded. Becomes In this case, the important thing is
The contact with the cylindrical body is performed when the fiber immediately after spinning is in a semi-solid state. When the fibers are contacted after the solidification proceeds, it is difficult to form one surface of the nonwoven fabric on the smooth surface (B). The present invention can be practiced as long as the spinning method is such that the fiber coming out of the spinning nozzle is in a semi-solid state.Preferred embodiments include, for example, a melt blowing method and a flash spinning method. This is a preferred embodiment. By forming the surface of the cylindrical body or the like with a smooth surface such as a metal roll or a metal belt, the fiber hitting this surface is solidified into a nonwoven fabric having a smooth surface on one side. Therefore, even after being collected next by a suction conveyor or the like, a smooth surface is maintained.

【００１２】また、平滑面を有する回転する該円筒体等
上での堆積する位置を変化させることで、繊維の密度、
配向状態を調節することが可能であり、紡糸ノズルから
放出される繊維が、該円筒体等の面から外れる直前の位
置で接触を行い（繊維の放出される方向の直線が、該円
筒体等の円周に対して接線に近くなるように該円筒体を
配置して円筒体等の回転方向と同じ方向に繊維を吹き付
けるようにする。図１において円筒体２を少し左に移動
させた状態にて行う）不織布を形成させることで、得ら
れる不織布は、ＭＤ方向に並んだ繊維の割合が多くな
り、結果として、ＭＤ方向の不織布強力が増大された不
織布を得ることができる。紡糸ノズルから放出された繊
維の―部を該円筒体等の表面に接触させ、残りを直接サ
クションコンべア等に捕集させる方法、すなわち上記
（１３）項の発明は、本発明の特に好ましい態様であ
る。この方法を実施するためには、図１の円筒体２を更
に左に移動させればよい。この態様を図２に示す。[0012] Further, by changing the deposition position on the rotating cylindrical body or the like having a smooth surface, the fiber density,
The orientation state can be adjusted, and the fibers discharged from the spinning nozzle make contact at a position immediately before deviating from the surface of the cylinder or the like (the straight line in the direction in which the fibers are released is aligned with the cylinder or the like). The fiber is sprayed in the same direction as the rotation direction of the cylindrical body, etc., so that the cylindrical body is slightly moved to the left in FIG. In the nonwoven fabric obtained, the ratio of fibers arranged in the MD direction is increased, and as a result, a nonwoven fabric having an increased strength in the nonwoven fabric in the MD direction can be obtained. The method of bringing the minus part of the fiber discharged from the spinning nozzle into contact with the surface of the cylindrical body or the like and directly collecting the remainder on a suction conveyor or the like, that is, the invention of the above item (13) is particularly preferred in the present invention. It is an aspect. In order to carry out this method, the cylinder 2 in FIG. 1 may be moved further to the left. This embodiment is shown in FIG.

【００１３】図２の態様では、円筒体等２とサクション
コンべア等４の間には後述する繊維集合体（Ａ’）及び
繊維集合体（Ｂ’）が積層状態で通過するに充分な隙間
を設けて置くことが好ましい。かかる図２の製造装置に
おいて、紡糸ノズル１より紡糸された繊維５の一部を半
固化状態のうちに、前記円筒体等２に直接当てて接触堆
積させた後、回転円筒体２の矢印Ｘ方向の回転で堆積さ
れた繊維は回転円筒体２の平滑面と接触しながら下方の
サクションコンべア等４の上に堆積する。この結果、前
記円筒体等２と接触した面には、平滑面（Ｂ）が形成さ
れた繊維集合体（Ｂ’）５Ｂが得られるのである。In the embodiment of FIG. 2, between the cylindrical body 2 and the suction conveyor 4 etc., a fiber assembly (A ') and a fiber assembly (B') described later are sufficient to pass in a laminated state. It is preferable to provide a gap. In the manufacturing apparatus shown in FIG. 2, a part of the fiber 5 spun from the spinning nozzle 1 is brought into direct contact with the cylindrical body 2 or the like in a semi-solid state, and is then deposited thereon. The fibers deposited by the rotation in the direction accumulate on the lower suction conveyor 4 while contacting the smooth surface of the rotating cylinder 2. As a result, a fiber assembly (B ') 5B having a smooth surface (B) formed on the surface in contact with the cylindrical body 2 is obtained.

【００１４】一方、紡糸ノズル１より同時に吐出された
繊維の残部は直下に設置されたサクション３で直接吸引
され、サクションコンべア等４上に捕集堆積されるの
で、サクションコンべア等４のネットと接触した面に
は、ネットの凹凸により粗硬な凹凸面（Ａ）が形成され
た繊維集合体（Ａ’）５Ａが形成される。この動作は連
続的に行われるので、繊維集合体（Ａ’）５Ａは、サク
ションコンべア等４上を矢印Ｚ方向に移動搬送され、前
記繊維集合体（Ｂ’）５Ｂも平滑面（Ｂ）を上にして繊
維集合体（Ａ’）５Ａと合流積層されることで、下方の
面には粗硬な凹凸面（Ａ）を有する繊維集合体（Ａ’）
５Ａが、ー方、上方の面には平滑面（Ｂ）を有する繊維
集合体（Ｂ’）５Ｂからなる積層繊維集合体シート（不
織布）６が得られる。つまり、図２の装置により製造さ
れた本発明の不織布は、サクションコンべア等４にも紡
糸後の半固化状態に近い繊維がネット孔を通して吸引力
で直接捕集堆積されるので、図１の装置により製造され
た不織布に比べて、ネット側の面は粗硬感のある凹凸を
有する凹凸面（Ａ）がより顕著に発生するのである。積
層繊維集合体シート６は、サクションコンべア等４上を
矢印Ｚ方向に搬送され熱処理装置７に送られる。ここ
で、繊維接点が熱接着され、繊維集合体（Ａ’）５Ａ及
び繊維集合体（Ｂ’）５Ｂが一体化された本発明の不織
布を得ることができるのである。On the other hand, the remainder of the fibers simultaneously discharged from the spinning nozzle 1 is directly sucked by the suction 3 installed immediately below and collected and deposited on the suction conveyor 4 so that the suction conveyor 4 and the like can be collected. The fiber assembly (A ') 5A in which the rough and uneven surface (A) is formed by the unevenness of the net is formed on the surface in contact with the net. Since this operation is performed continuously, the fiber assembly (A ') 5A is moved and conveyed on the suction conveyor 4 in the direction of arrow Z, and the fiber assembly (B') 5B is also smoothed (B '). ) With the fiber assembly (A ′) 5A merged and laminated, so that the fiber assembly (A ′) having a rough uneven surface (A) on the lower surface
A laminated fiber aggregate sheet (nonwoven fabric) 6 composed of a fiber aggregate (B ') 5B having a smooth surface (B) on the upper surface is obtained. In other words, in the nonwoven fabric of the present invention manufactured by the apparatus shown in FIG. 2, fibers close to a semi-solid state after spinning are directly collected and deposited by suction through the net holes in the suction conveyor 4 and the like. As compared with the nonwoven fabric manufactured by the above device, the uneven surface (A) having unevenness with a rough and hard feeling is more remarkably generated on the surface on the net side. The laminated fiber aggregate sheet 6 is conveyed on the suction conveyor 4 in the direction of arrow Z and sent to the heat treatment device 7. Here, the fiber contact is thermally bonded, and the nonwoven fabric of the present invention in which the fiber assembly (A ') 5A and the fiber assembly (B') 5B are integrated can be obtained.

【００１５】粗硬な凹凸の隆起程度は、コンべアのメッ
シュ、吸引力、コンべアの移動速度、紡糸吐出量、紡糸
速度、繊度、目付、円筒体等のサクションコンべア等へ
の押しつけ圧力等を調節することで様々なものが得られ
る。凹凸の隆起形状もシボ状、ループ状、突起状などが
形成されるが、特に限定されるものではない。この操作
により、不織布の柔軟性が向上するため、平滑面側から
触れた時に、より肌触りの良い不織布とすることができ
る。The degree of elevation of the rough irregularities depends on the conveyor mesh, suction force, conveyor moving speed, spinning discharge amount, spinning speed, fineness, basis weight, and suction conveyor such as cylindrical body. Various things can be obtained by adjusting the pressing pressure and the like. The raised shape of the unevenness may be a grain shape, a loop shape, a projection shape, or the like, but is not particularly limited. By this operation, the flexibility of the nonwoven fabric is improved, so that the nonwoven fabric can be made more comfortable when touched from the smooth surface side.

【００１６】また、円筒体等をＹ−Ｙ’方向に移動さ
せ、円筒体等の上において接触させる繊維の量を変化さ
せることで、繊維の密度、配向状態、配向した繊維の量
を調節することが可能であり、できるだけ接触させる繊
維の量を多くすれば、得られる不織布は、ＭＤ方向に並
んだ繊維の割合が多くなり、結果として、ＭＤ方向の不
織布強力が増大された不織布を得ることができる。Further, by moving the cylindrical body or the like in the YY 'direction and changing the amount of the fiber to be brought into contact with the cylindrical body or the like, the density, the state of orientation, and the amount of the oriented fiber are adjusted. It is possible to increase the amount of fibers to be brought into contact as much as possible, so that the resulting nonwoven fabric has a higher percentage of fibers arranged in the MD direction, and as a result, obtains a nonwoven fabric with increased nonwoven fabric strength in the MD direction. Can be.

【００１７】不織布の一方の片面を平滑面（Ｂ）に形成
するためには、紡糸ノズルから吐出された繊維を半固化
状態のうちに平滑な表面を有する回転する円筒体等の表
面に接触させてからサクションコンべア等の上に捕集さ
せることが必要であり、この回転する円筒体等の表面に
接触した面が不織布の平滑面（Ｂ）となる。なお円筒体
等の表面の材質は、メルトブロー紡糸時の紡糸ノズルよ
り噴出される熱風の温度に耐えるものであれば、金属の
他に、紙管やテフロン等でもかまわない。但し、その面
の粗度が大きい状態であると、不織布表面も粗い状態と
なるため注意が必要である。また、必要に応じて円筒体
または回転移動コンべアのべルトに空冷や水冷の機構を
設けて、表面温度が上昇しすぎないように調節してもよ
い。In order to form one surface of the nonwoven fabric as a smooth surface (B), the fibers discharged from the spinning nozzle are brought into contact with the surface of a rotating cylindrical body having a smooth surface in a semi-solid state. It is necessary that the non-woven fabric be collected on a suction conveyor or the like after that, and the surface in contact with the surface of the rotating cylinder or the like becomes the smooth surface (B) of the nonwoven fabric. The material of the surface of the cylindrical body or the like may be a paper tube, Teflon, or the like, in addition to metal, as long as it can withstand the temperature of hot air blown from the spinning nozzle during melt blow spinning. However, care must be taken when the roughness of the surface is large because the surface of the nonwoven fabric is also rough. Further, if necessary, an air-cooling or water-cooling mechanism may be provided on the cylindrical body or the belt of the rotary moving conveyor to adjust the surface temperature so as not to rise too much.

【００１８】円筒体の最大直径または該回転移動コンべ
アのべルトを回転させ、保持しているロール直径は、紡
糸ノズルとサクションドラムまたはサクションコンべア
の間の距離（以下ＤＣＤと略記する。）にもよるが、通
常直径４〜５０ｃｍのものが使用される。直径が小さす
ぎると繊維を形成する面のＭＤ方向の幅が小さくなり、
紡糸された繊維をＭＤ方向に配向させる場合には、直接
サクションコンべア等に捕集される繊維が多くなり、充
分に配向できない結果となる。また、直径が大きすぎる
と紡糸ノズルとの距離が短くなり、紡糸ノズルより噴出
される熱風を乱し、繊維の飛散や不織布幅方向の均一性
を損なうため、ＤＣＤの１／２までとした方が望まし
い。The maximum diameter of the cylindrical body or the diameter of the roll that rotates and holds the belt of the rotary moving conveyor is determined by the distance between the spinning nozzle and the suction drum or the suction conveyor (hereinafter abbreviated as DCD). ), A diameter of 4 to 50 cm is usually used. If the diameter is too small, the width in the MD direction of the surface forming the fiber becomes small,
When the spun fibers are oriented in the MD direction, a large number of fibers are directly collected on a suction conveyor or the like, resulting in insufficient orientation. On the other hand, if the diameter is too large, the distance from the spinning nozzle becomes short, which disturbs the hot air blown out from the spinning nozzle, impairs the scattering of fibers and the uniformity in the width direction of the nonwoven fabric. Is desirable.

【００１９】この製法による不織布の平均繊維径は、１
〜１００μｍ程度までのものが得られるが、細すぎると
通気性が低下し、太すぎると肌触り感が損なわれるた
め、実際に吸収性物品に用いられるものとしては、平均
繊維径が２〜５０μｍ程度のものが好ましい。また、不
織布の目付としては、目付が少ないと不織布強力が低下
し、逆に目付が多いと柔軟性が損なわれるため５〜８０
ｇ／ｍ2のものが好ましい。The average fiber diameter of the nonwoven fabric produced by this method is 1
Although it is possible to obtain those up to about 100 μm, if it is too thin, the air permeability decreases, and if it is too thick, the feeling of touch is impaired, so that as an actual absorbent article, the average fiber diameter is about 2 to 50 μm Are preferred. As the basis weight of the nonwoven fabric, if the basis weight is small, the strength of the nonwoven fabric is reduced, and if the basis weight is large, the flexibility is impaired.
g / m 2 are preferred.

【００２０】本発明の不織布において粗硬な凹凸面
（Ａ）および平滑面（Ｂ）の状態の差を表すためにＪＩ
Ｓ Ｂ ０６０１に準拠し測定される粗硬度比を用いる
ことができる。すなわち、肌触り感を向上させるため不
織布の粗硬度は、ＪＩＳ Ｂ ０６０１に準拠して測定
した粗硬な凹凸面（Ａ）の平均粗さを平滑面（Ｂ）の平
均粗さで割ることで表した粗硬度比Ａ／Ｂを１．５以
上、より好ましくは２以上にすることが望ましい。この
値が小さいとざらつき感を生じ、肌触りを低下させてし
まう。なお、平滑面の粗硬度は、円筒体または回転移動
コンべアのべルトにおける表面に、梨地加工を施した
り、微小な編み目、絵柄模様を入れるなどの方法により
調節してもよい。この場合は、平滑面（Ｂ）が著しく微
小な凹凸を有しながら平滑性を有する味わいのある風合
いとなる。In the nonwoven fabric of the present invention, JI is used to express the difference between the state of the rough and uneven surface (A) and the state of the smooth surface (B).
A coarse hardness ratio measured according to SB0601 can be used. That is, the roughness of the nonwoven fabric for improving the feel of touch is calculated by dividing the average roughness of the rough uneven surface (A) measured according to JIS B0601 by the average roughness of the smooth surface (B). It is desirable that the rough hardness ratio A / B is 1.5 or more, more preferably 2 or more. If this value is small, a rough feeling is generated, and the touch is reduced. The rough hardness of the smooth surface may be adjusted by a method such as applying a satin finish to the surface of the cylindrical body or the belt of the rotatable conveyor or adding a fine stitch or a pattern. In this case, the smooth surface (B) has a smooth texture with extremely fine irregularities, and has a pleasant texture.

【００２１】また、本発明の不織布の粗硬な凹凸面
（Ａ）および平滑面（Ｂ）の状態の差を表すために、摩
擦感テスターによって測定される平均摩擦偏差比を用い
ることもできる。すなわち、摩擦感テスターで測定した
粗硬な凹凸面（Ａ）の平均摩擦偏差を平滑面（Ｂ）の平
均摩擦偏差で除すことで表した平均摩擦偏差比Ａ／Ｂを
２以上、より好ましくは２．５以上とすることで、より
肌触りの良い、不織布面を形成することができる。この
値は大きい場合には問題とならないが、２．０を下回る
と、抵抗感が生じ肌触りを悪くする要因となる。Further, in order to express the difference between the state of the rough and uneven surface (A) and the state of the smooth surface (B) of the nonwoven fabric of the present invention, an average friction deviation ratio measured by a friction tester can be used. That is, the average friction deviation ratio A / B expressed by dividing the average friction deviation of the rough and uneven surface (A) measured by the friction tester by the average friction deviation of the smooth surface (B) is 2 or more, more preferably. By setting it to 2.5 or more, it is possible to form a nonwoven fabric surface with a better touch. When this value is large, there is no problem, but when it is less than 2.0, a sense of resistance is generated, which is a factor of deteriorating the touch.

【００２２】更に、一方向だけに不織布強度が必要な場
合には、円筒体等の上に不織布が形成される位置を調節
することで繊維のＭＤ方向への配向度を増やすことでＭ
Ｄ方向の不織布強力を上げることが可能である。ＭＤ方
向を０度とし、これに対して、繊維の軸方向がＭＤ方向
と成す角度の平均値をＭＤ配向角度としたとき、この値
が３０度以内となるような状態に円筒体等を配置するこ
とでＭＤ方向の不織布強度に優れた不織布を得ることが
できる。具体的にはＭＤ方向／ＣＤ方向の不織布強度比
が１．３以上、好ましくは１．５以上となることが望ま
しく、この値より低いと吸収性物品に使用されたときの
強度が充分得られず、延び過ぎたり、破れたりしてしま
う。Further, when the strength of the nonwoven fabric is required only in one direction, the degree of orientation of the fiber in the MD direction is increased by adjusting the position where the nonwoven fabric is formed on the cylindrical body or the like.
It is possible to increase the strength of the nonwoven fabric in the D direction. When the MD direction is 0 degree and the average value of the angle formed by the axial direction of the fiber and the MD direction is the MD orientation angle, the cylinder and the like are arranged such that this value is within 30 degrees. By doing so, a nonwoven fabric excellent in the strength of the nonwoven fabric in the MD direction can be obtained. Specifically, it is desirable that the strength ratio of the nonwoven fabric in the MD direction / CD direction is 1.3 or more, preferably 1.5 or more. If the ratio is lower than this value, the strength when used in an absorbent article can be sufficiently obtained. Without being stretched or broken.

【００２３】不織布の繊維落脱防止や不織布強度を出す
ためには、不織布の熱処理が必要であり、遠赤外線ヒー
ターやスルーエアー型ドライヤーによる方法が挙げられ
るが、遠赤外線ヒーターは、目付が大きい場合や繊維径
が細い場合、不織布への熱の通りが悪いため、スルーエ
アー型ドライヤーによる熱処理が望ましい。処理温度と
しては、充分な熱接着と加熱しすぎによる風合いの低下
を考慮し、低融点樹脂の融点以上高融点成分の融点以下
の温度が望ましい。Heat treatment of the nonwoven fabric is necessary in order to prevent the fiber from falling out of the nonwoven fabric and to increase the strength of the nonwoven fabric, and a method using a far-infrared heater or a through-air dryer can be used. When the fiber diameter is small, the heat flow to the nonwoven fabric is poor, and therefore, heat treatment with a through-air dryer is desirable. The treatment temperature is desirably a temperature not lower than the melting point of the low melting point resin and not higher than the melting point of the high melting point component, in consideration of sufficient thermal bonding and a reduction in texture due to excessive heating.

【００２４】以上の様に、本発明の不織布は、熱可塑性
繊維からなる不織布の一方の面を滑らかにすることで、
この面を肌側になるように吸収性物品に使用したとき、
肌触りを向上させ、他方の面に凹凸を付けることで、凹
凸によるクッション性と凹部による屈曲性により不織布
の柔軟性も向上させている。また、高融点樹脂と低融点
樹脂からなる複合繊維または混織繊維を使用すること
で、風合いを損なうことなく繊維交点を熱接着し、繊維
落脱を防止している。更に、平滑面側の繊維の並びをＭ
Ｄ方向に揃えることで、不織布強度が必要とされる用途
にも対応ができるのである。このため、従来はスパンボ
ンド不織布との貼り合わせが必要であったところでも貼
り合わせを必要としなくすることが可能である。したが
って、貼り合わせるスパンボンド不織布の量を減らすこ
とが可能となるため、製造工程の簡略化やコスト削減に
有益である。As described above, the nonwoven fabric of the present invention is obtained by smoothing one surface of a nonwoven fabric made of thermoplastic fiber,
When this surface is used for an absorbent article so as to be on the skin side,
The softness of the nonwoven fabric is also improved by improving the touch and providing the other surface with irregularities, by the cushioning property due to the irregularities and the flexibility due to the concave parts. In addition, by using a composite fiber or a mixed woven fiber composed of a high melting point resin and a low melting point resin, the fiber intersections are thermally bonded without impairing the feeling, thereby preventing the fiber from falling off. Further, the arrangement of the fibers on the smooth surface side is M
By arranging them in the D direction, it is possible to cope with applications requiring nonwoven fabric strength. For this reason, it is possible to eliminate the need for lamination even where the lamination with the spunbonded nonwoven fabric has conventionally been required. Therefore, the amount of spunbonded nonwoven fabric to be bonded can be reduced, which is advantageous for simplifying the manufacturing process and reducing costs.

【００２５】[0025]

【実施例】以下、実施例及び比較例により本発明を詳細
に説明するが、本発明はこれら実施例に限定されるもの
ではない。なお、各例において用いた測定方法を以下に
示す。 〇平均繊維径 不織布を構成する繊維の電子顕微鏡画像を画像処理装置
に取り込み、繊維直径を１００本測定し、その平均値を
平均繊維径とした。 〇粗硬度比 ＪＩＳ Ｂ ０６０１に準拠し、不織布の表裏面におい
て、平均粗さを測定長１０ｍｍでＭＤ方向とＣＤ方向そ
れぞれ３ケ所測定し、各面の平均値をその面における平
均粗さとした。次に、本発明の不織布についてはＤＣＤ
の間に設けた円筒体等の表面に当たる面、それ以外の不
織布についてはサクションコンべア等に当たる面におけ
る平均粗さで、一方の面の平均粗さを割った値を粗硬度
比とした。 〇平均摩擦偏差比 摩擦感テスター（カトーテック製）を用い、試料移動速
度１ｍｍ／ｓｅｃにて表裏面の各平均摩擦偏差を測定し
た。次に、本発明の不織布についてはＤＣＤの間に設け
た円筒体等の表面に当たる面、それ以外の不織布につい
てはサクションコンべア等に当たる面における平均摩擦
偏差で、一方の面の平均摩擦偏差を割った値を平均摩擦
偏差比とした。 〇平均配向角度 不織布の表裏面において繊維の電子顕微鏡画像を画像処
理装置に取り込み、任意の繊維１００本に対して繊維長
１ｍｍの軸方向を直線で結んだ線とＭＤ方向が成す角度
を−９０度〜９０度の範囲で測定し、マイナスの角度は
プラスに変換した後、全ての角度の平均値をその面での
平均配向角度とした。 〇毛羽立ち ＪＩＳ Ｌ ０８４９に準拠し、ラビングメーター（ス
ガ試験機製）を用い、１回／ｓｅｃの往復摩擦を１００
回行い、目視判定した。毛羽立ちがないものを良、毛羽
立ちがあるものを不良とした。なお、本発明の不織布に
ついては平滑面を測定した。 〇肌触り モニター１０人が、不織布表面の手触りによる官能試験
を行い、肌触りが良いと感じたら１点／人で加点した。
なお、本発明の不織布については平滑面を測定した。 〇強度比 ＪＩＳ Ｌ １０９６に準拠し、ＭＤ方向とＣＤ方向の
引張強度をそれぞれ３回測定し、各平均値を不織布の強
度とした。次に、ＣＤ方向の強度で、ＭＤ方向の強度を
割った値を強度比とした。 〇耐水圧 耐水圧測定器（東洋精機製作所製）を用い、サンプル５
枚の平均値を耐水圧とした。なお、本発明の不織布につ
いては平滑面を水に当たる面として測定した。The present invention will be described in detail with reference to examples and comparative examples, but the present invention is not limited to these examples. The measurement method used in each example is shown below. 〇Average fiber diameter An electron microscope image of the fibers constituting the nonwoven fabric was taken into an image processing apparatus, 100 fiber diameters were measured, and the average value was defined as the average fiber diameter. 〇Rough hardness ratio In accordance with JIS B 0601, the average roughness was measured at three locations in the MD and CD directions on the front and back surfaces of the nonwoven fabric with a measurement length of 10 mm, and the average value of each surface was defined as the average roughness on that surface. Next, regarding the nonwoven fabric of the present invention, DCD
The value obtained by dividing the average roughness of one surface by the average roughness of the surface corresponding to the surface of the cylindrical body provided between them and the surface of the other nonwoven fabric corresponding to the suction conveyor was defined as the coarse hardness ratio. 〇Average friction deviation ratio Each friction deviation on the front and back surfaces was measured at a sample moving speed of 1 mm / sec using a friction tester (manufactured by Kato Tech). Next, for the nonwoven fabric of the present invention, the average frictional deviation of the surface corresponding to the surface of the cylindrical body provided between the DCDs, and for the other nonwoven fabric, the average frictional deviation of the surface corresponding to the suction conveyor, etc. The divided value was defined as the average friction deviation ratio. 〇Average orientation angle The electron microscopic images of the fibers on the front and back surfaces of the nonwoven fabric are taken into an image processing apparatus, and the angle formed by a line connecting the axial direction of the fiber length of 1 mm and the MD direction with respect to 100 arbitrary fibers is −90. The angle was measured in a range of degrees to 90 degrees, and a negative angle was converted into a positive angle. Then, an average value of all angles was defined as an average orientation angle on the surface. 〇Fuzziness According to JIS L 0849, using a rubbing meter (manufactured by Suga Test Machine), reciprocating friction of 100 times / sec.
Twice and visually determined. Those with no fluff were rated good, and those with fluff were rated poor. In addition, about the nonwoven fabric of this invention, the smooth surface was measured. 〇Touch The ten monitors conducted a sensory test by touching the surface of the nonwoven fabric, and when they felt that the touch was good, they were given 1 point per person.
In addition, about the nonwoven fabric of this invention, the smooth surface was measured. 〇Strength ratio Tensile strength in the MD and CD directions was measured three times in accordance with JIS L 1096, and the average value was taken as the strength of the nonwoven fabric. Next, a value obtained by dividing the intensity in the MD direction by the intensity in the CD direction was defined as an intensity ratio.水 Water pressure resistance Sample 5 using a water pressure resistance measuring instrument (Toyo Seiki Seisakusho)
The average value of the sheets was defined as the water pressure resistance. In addition, about the nonwoven fabric of this invention, the smooth surface was measured as the surface exposed to water.

【００２６】（実施例１）メルトブロー用並列型複合糸
紡糸ノズル（ホール径０．３ｍｍ、１，０ｍｍピッチ、
５０１ホール）より、高融点樹脂としてポリプロピレン
（ＭＦＲ７２ｇ／１０分（２３０℃）、ｍｐ．１６２
℃）を、低融点樹脂として高密度ポリエチレン（ＭＩ３
８ｇ／１０分（１９０℃）、ｍｐ。１３３℃）を紡糸温
度２８０℃、成分比率５０：５０で押し出し、３６０℃
の加熱空気を用いてメルトブロー紡糸した。ＤＣＤは５
０ｃｍとし、サクションコンべアと接するように直径１
０ｃｍ、幅５１０ｍｍのステンレス製のロールを設置し
て、サクションコンべアと同じ周速で回転させ、メルト
ブロー紡糸した繊維の一部をこのロール上に直接当てて
堆積した後、引き続き下方のサクションコンべア上へ移
動捕集させることで不織布を作製した。次に、この不織
布を加熱温度１３３℃のスルーエアー型ドライヤーに通
して低融点樹脂を溶融させることで繊維接点を熱接合さ
せた、平均繊維径４μｍ、目付２０ｇ／ｍ2の不織布を
作製した。得られた不織布は、平滑なステンレス製ロー
ル面と接触した面は平滑面（Ｂ）を形成し、他方の面は
粗硬な凹凸面（Ａ）を形成していた。測定結果は表１、
表２に示す。(Example 1) Parallel type composite yarn spinning nozzle for melt blowing (hole diameter 0.3 mm, pitch 1.0 mm,
501 holes), polypropylene (MFR 72 g / 10 min (230 ° C.), mp.
C.) as high-density polyethylene (MI3
8 g / 10 min (190 ° C.), mp. 133 ° C.) at a spinning temperature of 280 ° C. and a component ratio of 50:50, 360 ° C.
And melt blow spinning. DCD is 5
0 cm and a diameter of 1 so that it contacts the suction conveyor
A stainless steel roll having a width of 0 cm and a width of 510 mm was installed, rotated at the same peripheral speed as the suction conveyor, and a portion of the melt-blow spun fiber was directly applied to the roll to be deposited. A nonwoven fabric was produced by moving and collecting the material on a bear. Next, the nonwoven fabric was passed through a through-air dryer at a heating temperature of 133 ° C. to melt the low-melting-point resin, thereby thermally bonding the fiber contacts to produce a nonwoven fabric having an average fiber diameter of 4 μm and a basis weight of 20 g / m 2 . In the obtained nonwoven fabric, the surface in contact with the smooth stainless steel roll surface formed a smooth surface (B), and the other surface formed a rough and rough uneven surface (A). Table 1 shows the measurement results.
It is shown in Table 2.

【００２７】（比較例１）メルトブロー用単一糸紡糸ノ
ズル（ホール径０．３ｍｍ、１．０ｍｍピッチ、５０１
ホール）より、高密度ポリエチレン（ＭＩ３８ｇ／１０
分（１９０℃）、ｍｐ．１３３℃）を紡糸温度２７０℃
で押し出し、３６０℃の加熱空気を用いてメルトブロー
紡糸した。ＤＣＤは５０ｃｍとし、メルトブロー紡糸し
た繊維を直接サクションコンべア上に捕集することで、
平均繊維径４μｍ、目付２０ｇ／ｍ 2の不織布を作製し
た。得られた不織布は両面とも粗硬な状態の凹凸面
（Ａ）であった。測定結果は表１、表２に示す。(Comparative Example 1) Single yarn spinning for melt blowing
Slip (Hole diameter 0.3mm, 1.0mm pitch, 501
Hole) from high-density polyethylene (MI 38g / 10
Min (190 ° C.), mp. 133 ° C) at a spinning temperature of 270 ° C
Extrusion with 360 ° C heated air
Spun. DCD is 50cm, melt blow spinning
The collected fibers are collected directly on the suction conveyor,
Average fiber diameter 4μm, basis weight 20g / m TwoOf non-woven fabric
Was. The obtained non-woven fabric is rough on both sides.
(A). The measurement results are shown in Tables 1 and 2.

【００２８】（実施例２）メルトブロー用鞘芯型複合糸
紡糸ノズル（ホール径０．３ｍｍ、１．０ｍｍピッチ、
５０１ホール）より、高融点樹脂としてポリプロピレン
（ＭＦＲ７２ｇ／１０分（２３０℃）、ｍｐ。１６２
℃）を、低融点樹脂として高密度ポリエチレン（ＭＩ３
８ｇ／１０分（１９０℃）、ｍｐ。１３３℃）を紡糸温
度２８０℃、成分比率５０：５０で押し出し、３６０℃
の加熱空気を用いてメルトブロー紡糸した。ＤＣＤは５
０ｃｍとし、サクションコンべアと接するように直径１
０ｃｍ、幅５１０ｍｍのステンレス製のロールを設置し
て、サクションコンべアと同じ周速で回転させ、メルト
ブロー紡糸した繊維の一部をこのロール上に直接当てて
堆積した後、引き続き下方のサクションコンべア上ヘ移
動捕集させることで不織布を作製した。次に、この不織
布を加熱温度１３５℃のスルーエアー型ドライヤーに通
して低融点樹脂を溶融させることで繊維接点を熱接合さ
せた、平均繊維径６μｍ、目付３０ｇ／ｍ2の不織布を
作製した。得られた不織布は、平滑なステンレス製ロー
ル面と接触した面は平滑面（Ｂ）を形成し、他方の面は
粗硬な凹凸面（Ａ）を形成していた。測定結果は表１、
表２に示す。(Example 2) Sheath-core type composite yarn spinning nozzle for melt blowing (hole diameter 0.3 mm, 1.0 mm pitch,
501 hole), polypropylene (MFR 72 g / 10 min (230 ° C.), mp. 162) as a high melting point resin.
C.) as high-density polyethylene (MI3
8 g / 10 min (190 ° C.), mp. 133 ° C.) at a spinning temperature of 280 ° C. and a component ratio of 50:50, 360 ° C.
And melt blow spinning. DCD is 5
0 cm and a diameter of 1 so that it contacts the suction conveyor
A stainless steel roll having a width of 0 cm and a width of 510 mm was installed, rotated at the same peripheral speed as the suction conveyor, and a portion of the melt-blow spun fibers was directly applied to the roll to be deposited thereon. A nonwoven fabric was produced by moving and collecting the material on the bear. Next, the nonwoven fabric was passed through a through-air dryer at a heating temperature of 135 ° C. to melt the low-melting point resin, thereby thermally bonding the fiber contacts to produce a nonwoven fabric having an average fiber diameter of 6 μm and a basis weight of 30 g / m 2 . In the obtained nonwoven fabric, the surface in contact with the smooth stainless steel roll surface formed a smooth surface (B), and the other surface formed a rough and rough uneven surface (A). Table 1 shows the measurement results.
It is shown in Table 2.

【００２９】（比較例２）比較例１と同じノズルより、
ポリプロピレン（ＭＦＲ７２ｇ／１０分（２３０℃）、
ｍｐ．１６２℃）を紡糸温度２８０℃で押し出し、３６
０℃の加熱空気を用いてメルトブロー紡糸した。ＤＣＤ
は５０ｃｍとし、メルトブロー紡糸した繊維を直接サク
ションコンべア上に捕集することで、平均繊維径６μ
ｍ、目付３０ｇ／ｍ2の不織布を作製した。得られた不
織布は両面とも粗硬な状態の凹凸面（Ａ）であった。測
定結果は表１、表２に示す。Comparative Example 2 From the same nozzle as in Comparative Example 1,
Polypropylene (MFR72g / 10min (230 ° C),
mp. 162 ° C.) at a spinning temperature of 280 ° C.
Melt blow spinning was performed using hot air at 0 ° C. DCD
Is 50 cm, and the melt-blown spun fibers are directly collected on a suction conveyor to obtain an average fiber diameter of 6 μm.
m, a nonwoven fabric having a basis weight of 30 g / m 2 was prepared. The obtained nonwoven fabric had a rough surface (A) in a rough and hard state on both sides. The measurement results are shown in Tables 1 and 2.

【００３０】（実施例３）実施例２と同じノズルより、
高融点樹脂としてエチレングリコールテレフタレート・
イソフタレート共重合体（ｍｐ．１６０℃）を、低融点
樹脂として高密度ポリエチレン（ＭＩ３８ｇ／１０分
（１９０℃）、ｍｐ．１３３℃）を紡糸温度２９０℃、
成分比率６０：４０で押し出し、３８０℃の加熱空気を
用いてメルトブロー紡糸した。ＤＣＤは５０ｃｍとし、
サクションコンべアと接するように直径１０ｃｍ、幅５
１０ｍｍのステンレス製のロールを設置して、サクショ
ンコンべアと同じ周速で回転させ、メルトブロー紡糸し
た繊維の一部をこのロール上に直接当てて堆積した後、
引き続き下方のサクションコンべア上ヘ移動捕集させる
ことで不織布を作製した。次に、この不織布を加熱温度
１３３℃のスルーエアー型ドライヤーに通して低融点樹
脂を溶融させることで繊維接点を熱接合させた、平均繊
維径８μｍ、目付３５ｇ／ｍ2の不織布を作製した。得
られた不織布は、平滑なステンレス製ロール面と接触し
た面は平滑面（Ｂ）を形成し、他方の面は粗硬な凹凸面
（Ａ）を形成していた。測定結果は表１、表２に示す。(Embodiment 3) From the same nozzle as in Embodiment 2,
Ethylene glycol terephthalate as high melting point resin
The isophthalate copolymer (mp. 160 ° C.) is made of a high-density polyethylene (MI 38 g / 10 min (190 ° C., mp. 133 ° C.) as a low-melting point resin, mp.
Extrusion was performed at a component ratio of 60:40, and melt blow spinning was performed using heated air at 380 ° C. DCD is 50cm,
Diameter 10cm, width 5 so as to be in contact with the suction conveyor
A stainless steel roll of 10 mm was installed, rotated at the same peripheral speed as the suction conveyor, and a part of the melt-blow spun fiber was directly applied to the roll and deposited.
Subsequently, the non-woven fabric was produced by moving and collecting it on the lower suction conveyor. Next, the nonwoven fabric was passed through a through-air dryer at a heating temperature of 133 ° C. to melt the low-melting-point resin, thereby thermally bonding the fiber contacts to produce a nonwoven fabric having an average fiber diameter of 8 μm and a basis weight of 35 g / m 2 . In the obtained nonwoven fabric, the surface in contact with the smooth stainless steel roll surface formed a smooth surface (B), and the other surface formed a rough and rough uneven surface (A). The measurement results are shown in Tables 1 and 2.

【００３１】（比較例３）実施例３と同じノズル及び同
じ原料を用い、紡糸温度２９０℃で押し出し、３８０℃
の加熱空気を用いてメルトブロー紡糸した。ＤＣＤは５
０ｃｍとし、メルトブロー紡糸した繊維を直接サクショ
ンコンべア上に捕集することで不織布を作製した。次
に、この不織布を加熱温度１３５℃のスルーエアー型ド
ライヤーに通して低融点樹脂を溶融させることで繊維接
点を熱接合させた、平均繊維径８μｍ、目付３５ｇ／ｍ
2の不織布を作製した。得られた不織布は両面とも粗硬
な状態の凹凸面（Ａ）であった。測定結果は表１、表２
に示す。(Comparative Example 3) Using the same nozzle and the same raw material as in Example 3, extruded at a spinning temperature of 290 ° C, 380 ° C
And melt blow spinning. DCD is 5
The length was set to 0 cm, and the melt-spun fiber was directly collected on a suction conveyor to prepare a nonwoven fabric. Next, the nonwoven fabric was passed through a through-air dryer at a heating temperature of 135 ° C. to melt the low-melting-point resin, thereby thermally bonding the fiber contacts. The average fiber diameter was 8 μm, and the basis weight was 35 g / m.
No. 2 nonwoven fabrics were produced. The obtained nonwoven fabric had a rough surface (A) in a rough and hard state on both sides. The measurement results are shown in Tables 1 and 2.
Shown in

【００３２】（実施例４）２成分を紡糸孔から交互に押
し出すメルトブロー用混織糸紡糸ノズル（ホール径０．
３ｍｍ、１．０ｍｍビッチ、５０１ホール）より、高融
点樹脂としてポリプロピレン（ＭＦＲ６７ｇ／１０分
（２３０℃）、ｍｐ．１６２℃）を、低融点樹脂として
プロピレン−エチレン−ブテン−１三元共重合体（エチ
レン：２．３重量％、ブテン−１：４．２重量％、ＭＦ
Ｒ６０ｇ／１０分（２３０℃）、ｍｐ．１３５℃）とを
紡糸温度２９０℃、成分比率５０：５０で押し出し、３
５０℃の加熱空気を用いてメルトブロー紡糸した。ＤＣ
Ｄは５０ｃｍとし、サクションコンべアと接するように
直径１０ｃｍ、幅５１０ｍｍのステンレス製のロールを
設置して、サクションコンべアと同じ周速で回転させ、
メルトブロー紡糸した繊維の一部をこのロール上に直接
当てて堆積した後、引き続き、下方のサクションコンべ
ア上へ移動捕集させることで不織布を作製した。次に、
この不織布を加熱温度１３５℃のスルーエアー型ドライ
ヤーに通して低融点樹脂を溶融させることで繊維接点を
熱接合させた、平均繊維径８μｍ、目付３５ｇ／ｍ2の
不織布を作製した。得られた不織布は、平滑なステンレ
ス製ロール面と接触した面は平滑面（Ｂ）を形成し、他
方の面は粗硬な凹凸面（Ａ）を形成していた。測定結果
は表１、表２に示す。(Example 4) A mixed-woven yarn spinning nozzle for melt-blowing (hole diameter of 0,2) for alternately extruding two components from a spinning hole.
From 3 mm, 1.0 mm bitch, 501 holes), polypropylene (MFR 67 g / 10 min (230 ° C.), mp. 162 ° C.) as a high melting point resin and propylene-ethylene-butene-1 terpolymer as a low melting point resin (Ethylene: 2.3% by weight, butene-1: 4.2% by weight, MF
R 60 g / 10 min (230 ° C.), mp. 135 ° C) at a spinning temperature of 290 ° C and a component ratio of 50:50.
Melt blow spinning was performed using heated air at 50 ° C. DC
D is 50 cm, a stainless steel roll having a diameter of 10 cm and a width of 510 mm is installed so as to be in contact with the suction conveyor, and rotated at the same peripheral speed as the suction conveyor,
After a part of the melt-blown spun fibers was directly applied to the roll and deposited, it was subsequently moved and collected on a lower suction conveyor to produce a nonwoven fabric. next,
This nonwoven fabric was passed through a through-air dryer at a heating temperature of 135 ° C. to melt the low-melting-point resin, thereby thermally bonding the fiber contacts to produce a nonwoven fabric having an average fiber diameter of 8 μm and a basis weight of 35 g / m 2 . In the obtained nonwoven fabric, the surface in contact with the smooth stainless steel roll surface formed a smooth surface (B), and the other surface formed a rough and rough uneven surface (A). The measurement results are shown in Tables 1 and 2.

【００３３】（比較例４）実施例４と同じノズル及び同
じ原料を用い、紡糸温度２９０℃で押し出し、３５０℃
の加熱空気を用いてメルトブロー紡糸した。ＤＣＤは５
０ｃｍとし、メルトブロー紡糸した繊維を直接サクショ
ンコンべア上に捕集することで、不織布を作製した。次
に、この不織布を加熱温度１３５℃のスルーエアー型ド
ライヤーに通して低融点樹脂を溶融させることで繊維接
点を熱接合させた、平均繊維径８μｍ、目付３５ｇ／ｍ
2の不織布を作製した。得られた不織布は両面とも粗硬
な状態の凹凸面（Ａ）であった。測定結果は表１、表２
に示す。(Comparative Example 4) Using the same nozzle and the same raw material as in Example 4, extruded at a spinning temperature of 290 ° C,
And melt blow spinning. DCD is 5
The length was set to 0 cm, and the melt-spun fiber was directly collected on a suction conveyor to prepare a nonwoven fabric. Next, the nonwoven fabric was passed through a through-air dryer at a heating temperature of 135 ° C. to melt the low-melting-point resin, thereby thermally bonding the fiber contacts. The average fiber diameter was 8 μm, and the basis weight was 35 g / m.
No. 2 nonwoven fabrics were produced. The obtained nonwoven fabric had a rough surface (A) in a rough and hard state on both sides. The measurement results are shown in Tables 1 and 2.
Shown in

【００３４】実施例で示した本発明の不織布は、毛羽立
ちが無く、肌触りが良好で、ＭＤ方向の不織布強度に優
れたものであった。これに対して、比較例で示した不織
布は、耐水圧にっいては同等の性能であるが、毛羽立ち
が多かったり、毛羽立ちが少なくても、肌触りの悪いも
のであった。The nonwoven fabric of the present invention shown in the examples had no fluff, had a good touch, and was excellent in the strength of the nonwoven fabric in the MD direction. On the other hand, the nonwoven fabric shown in the comparative example had the same performance in terms of water pressure resistance, but had poor fluff even if it had a lot of fluff or less fluff.

【００３５】次に、実施例１〜４で得られた本発明の不
織布と比較例１〜４で得られた不織布を吸収性物品に使
用し、着用試験を実施した。 （実施例５）実施例１で得られた不織布を平滑面（Ｂ）
が肌方向となる用に、生理用ナプキンのサイドシートと
して使用した。得られた生理用ナプキンを着用試験した
ところ、結果は表３に示すように、肌触りが良好で、液
漏れがなく、着用後の毛羽立ちも無い良好な結果であっ
た。Next, the nonwoven fabric of the present invention obtained in Examples 1 to 4 and the nonwoven fabric obtained in Comparative Examples 1 to 4 were used for absorbent articles, and a wearing test was carried out. (Example 5) The nonwoven fabric obtained in Example 1 was treated with a smooth surface (B).
Was used as a side sheet of a sanitary napkin so that the skin direction was reached. When the obtained sanitary napkin was subjected to a wearing test, as shown in Table 3, the results were good, with good touch, no liquid leakage, and no fluff after wearing.

【００３６】（実施例６）実施例２で得られた不織布を
平滑面（Ｂ）が肌方向となる用に、使い捨ておむつのサ
イドギャザーとして使用した。得られた使い捨ておむつ
を着用試験したところ、結果は表３に示すように、肌触
りが良好で、液漏れがなく、着用後の毛羽立ちも無い良
好な結果であった。(Example 6) The nonwoven fabric obtained in Example 2 was used as a side gather of a disposable diaper so that the smooth surface (B) faces the skin. When a wearing test was performed on the obtained disposable diaper, as shown in Table 3, the results were good, with good touch, no liquid leakage, and no fluff after wearing.

【００３７】（実施例７）実施例３で得られた不織布を
平滑面（Ｂ）が肌方向となる用に、使い捨ておむつのラ
ウンドシートとして使用した。得られた使い捨ておむつ
を着用試験したところ、結果は表３に示すように、肌触
りが良好で、液漏れがなく、着用後の毛羽立ちも無い良
好な結果であった。(Example 7) The nonwoven fabric obtained in Example 3 was used as a round sheet of a disposable diaper so that the smooth surface (B) was in the skin direction. When a wearing test was performed on the obtained disposable diaper, as shown in Table 3, the results were good, with good touch, no liquid leakage, and no fluff after wearing.

【００３８】（実施例８）実施例４で得られた不織布を
平滑面（Ｂ）が肌方向となる用に、使い捨ておむつのウ
ェストギャザーとして使用した。得られた使い捨ておむ
つを着用試験したところ、結果は表３に示すように、肌
触りが良好で、液漏れがなく、着用後の毛羽立ちも無い
良好な結果であった。(Example 8) The nonwoven fabric obtained in Example 4 was used as a waist gather of a disposable diaper so that the smooth surface (B) was oriented toward the skin. When a wearing test was performed on the obtained disposable diaper, as shown in Table 3, the results were good, with good touch, no liquid leakage, and no fluff after wearing.

【００３９】（比較例５）比較例１で得られた不織布を
生理用ナプキンのサイドシートとして使用した。得られ
た生理用ナプキンを着用試験したところ、結果は表３に
示すように、液漏れは無いが、肌触りが悪く、使用後に
毛羽立ちが見られ、性能の悪いものであった。Comparative Example 5 The nonwoven fabric obtained in Comparative Example 1 was used as a side sheet of a sanitary napkin. When the obtained sanitary napkin was subjected to a wearing test, the results were as shown in Table 3. As shown in Table 3, there was no liquid leakage, but the feel was poor, and fluff was observed after use, and the performance was poor.

【００４０】（比較例６）比較例２で得られた不織布を
使い捨ておむつのサイドギャザーとして使用した。得ら
れた使い捨ておむつを着用試験したところ、結果は表３
に示すように、液漏れは無いが、肌触りが悪く、使用後
に毛羽立ちが見られ、性能の悪いものであった。Comparative Example 6 The nonwoven fabric obtained in Comparative Example 2 was used as a side gather of a disposable diaper. Table 3 shows the results of a wearing test of the obtained disposable diaper.
As shown in Fig. 7, there was no liquid leakage, but the feel was poor, and fluff was seen after use, and the performance was poor.

【００４１】（比較例７）比較例３で得られた不織布を
使い捨ておむつのラウンドシートとして使用した。得ら
れた使い捨ておむつを着用試験したところ、結果は表３
に示すように、液漏れは無いが、肌触りが悪く、使用後
に毛羽立ちが見られ、性能の悪いものであった。Comparative Example 7 The nonwoven fabric obtained in Comparative Example 3 was used as a round sheet of a disposable diaper. Table 3 shows the results of a wearing test of the obtained disposable diaper.
As shown in Fig. 7, there was no liquid leakage, but the feel was poor, and fluff was seen after use, and the performance was poor.

【００４２】（比較例８）比較例４で得られた不織布を
使い捨ておむつのウェストギャザーとして使用した。得
られた使い捨ておむつを着用試験したところ、結果は表
３に示すように、液漏れは無いが、肌触りが悪く、使用
後に毛羽立ちが見られ、性能の悪いものであった。Comparative Example 8 The nonwoven fabric obtained in Comparative Example 4 was used as a waist gather of a disposable diaper. When the obtained disposable diaper was subjected to a wearing test, the results showed that there was no liquid leakage as shown in Table 3, but the feel was poor, and fluff was observed after use, and the performance was poor.

【００４３】[0043]

【表１】 [Table 1]

【００４４】[0044]

【表２】 [Table 2]

【００４５】[0045]

【表３】 [Table 3]

【００４６】[0046]

【発明の効果】本発明の不織布は、一方の面を他方の面
より平滑にすることで従来の不織布で得られなかった肌
触りを著しく良好にし、かつ、融点差が１０℃以上を有
する２成分以上の熱可塑性繊維を用い、繊維接点を熱接
着させることで繊維の落脱や毛羽立ちを抑えることがで
きる。更に、ＭＤ方向に繊維を配向させることによりＭ
Ｄ方向における不織布強力を増強させ、従来のメルトブ
ロー不織布が持つ欠点を改良することで、吸収性物品に
好適なメルトブロー不織布を提供することができる。As described above, the nonwoven fabric of the present invention is a two-component non-woven fabric having one side smoother than the other side, thereby significantly improving the feel that cannot be obtained with the conventional nonwoven fabric, and having a melting point difference of 10 ° C. or more. By using the above thermoplastic fibers and thermally bonding the fiber contacts, the fibers can be prevented from falling off and fluffing. Further, by orienting the fibers in the MD direction, M
By increasing the strength of the nonwoven fabric in the D direction and improving the drawbacks of the conventional meltblown nonwoven fabric, a meltblown nonwoven fabric suitable for an absorbent article can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の不織布の製造方法の一例を表わした概
略図。FIG. 1 is a schematic view illustrating an example of a method for producing a nonwoven fabric of the present invention.

【図２】本発明の不織布の製造方法の特に好ましい一例
を表わした概略図。FIG. 2 is a schematic view showing a particularly preferred example of the method for producing a nonwoven fabric of the present invention.

【符号の説明】 １ 紡糸ノズル ２ 平滑な表面を有する円筒体 ３ サクション ４ サクションコンベア ５ 繊維 ５Ａ 繊維集合体（Ａ’） ５Ｂ 繊維集合体（Ｂ’） ６ 不織布（積層繊維集合体シート） ７ 熱処理装置 （Ａ） 粗硬な凹凸面 （Ｂ） 平滑面[Description of Signs] 1 Spinning nozzle 2 Cylindrical body having a smooth surface 3 Suction 4 Suction conveyor 5 Fiber 5A Fiber aggregate (A ') 5B Fiber aggregate (B') 6 Non-woven fabric (laminated fiber aggregate sheet) 7 Heat treatment Equipment (A) Rough and rough surface (B) Smooth surface

Claims (13)

【特許請求の範囲】[Claims] 【請求項１】熱可塑性樹脂からなる繊維で構成される不
織布であって、該不織布は一方の面は粗硬な凹凸面
（Ａ）を形成し、他方の面は平滑面（Ｂ）であり、かつ
該不織布の繊維接点が熱接着されていることを特徴とす
る不織布。1. A non-woven fabric composed of fibers made of a thermoplastic resin, wherein the non-woven fabric has a rough uneven surface (A) on one surface and a smooth surface (B) on the other surface. A non-woven fabric, wherein the fiber contacts of the non-woven fabric are thermally bonded. 【請求項２】前記凹凸面（Ａ）と平滑面（Ｂ）が、粗硬
度比Ａ／Ｂ≧１．５である請求項１に記載の不織布。2. The nonwoven fabric according to claim 1, wherein the uneven surface (A) and the smooth surface (B) have a coarse hardness ratio A / B ≧ 1.5. 【請求項３】前記凹凸面（Ａ）と平滑面（Ｂ）が、平均
摩擦偏差比Ａ／Ｂ≧２である請求項１または２に記載の
不織布。3. The nonwoven fabric according to claim 1, wherein the uneven surface (A) and the smooth surface (B) have an average friction deviation ratio A / B ≧ 2. 【請求項４】不織布の平滑面（Ｂ）に分散する繊維が、
主として機械方向（ＭＤ方向）に配列し、その平滑面
（Ｂ）の平均配向角度が３０度以下である請求項１〜３
のいずれかに記載の不織布。4. The fiber dispersed on the smooth surface (B) of the nonwoven fabric,
4. An arrangement mainly in the machine direction (MD direction), wherein the average orientation angle of the smooth surface (B) is 30 degrees or less.
The nonwoven fabric according to any one of the above. 【請求項５】不織布の粗硬な凹凸面（Ａ）に分散する繊
維が、ランダム分散配列している請求項１〜３のいずれ
かに記載の不織布。5. The nonwoven fabric according to claim 1, wherein the fibers dispersed on the rough uneven surface (A) of the nonwoven fabric are randomly dispersed and arranged. 【請求項６】不織布の粗硬な凹凸面（Ａ）に分散する繊
維の平均配向角度が、平滑面（Ｂ）の平均配向角度よ
り、少なくとも１５度以上大きい請求項１〜５のいずれ
かに記載の不織布。6. The nonwoven fabric according to claim 1, wherein the average orientation angle of the fibers dispersed on the rough and uneven surface (A) is at least 15 degrees larger than the average orientation angle of the smooth surface (B). The described nonwoven fabric. 【請求項７】不織布の機械方向（ＭＤ方向）／横方向
（ＣＤ方向）の強度比が、少なくとも１．３である請求
項１〜６のいずれかに記載の不織布。7. The nonwoven fabric according to claim 1, wherein the strength ratio of the nonwoven fabric in the machine direction (MD direction) / lateral direction (CD direction) is at least 1.3. 【請求項８】不織布を構成する熱可塑性樹脂からなる繊
維が、１０℃以上の融点差を有する少なくとも２種の熱
可塑性樹脂からなる複合繊維である、請求項１〜７のい
ずれかに記載の不織布。8. The fiber according to claim 1, wherein the fiber comprising the thermoplastic resin constituting the nonwoven fabric is a composite fiber comprising at least two kinds of thermoplastic resins having a melting point difference of 10 ° C. or more. Non-woven fabric. 【請求項９】不織布を構成する熱可塑性樹脂からなる繊
維が、１０℃以上の融点差を有する少なくとも２種の熱
可塑性樹脂からなる混織繊維である、請求項１〜７のい
ずれかに記載の不織布。9. The fiber according to claim 1, wherein the fiber comprising the thermoplastic resin constituting the nonwoven fabric is a mixed fiber comprising at least two kinds of thermoplastic resins having a melting point difference of 10 ° C. or more. Nonwoven. 【請求項１０】不織布が、メルトブロー不織布である請
求項１〜９のいずれかに記載の不織布。10. The nonwoven fabric according to claim 1, wherein the nonwoven fabric is a melt blown nonwoven fabric. 【請求項１１】請求項１〜１０のいずれかに記載の不織
布を―部に用いた吸収性物品。11. An absorbent article using the nonwoven fabric according to any one of claims 1 to 10 for a-part. 【請求項１２】少なくとも１種の熱可塑性樹脂成分を溶
融して紡糸ノズルから吐出させ繊維とし、該繊維をサク
ションドラム上またはサクションコンべア上に堆積捕集
して繊維集合体とし、続いて熱処理により該繊維集合体
を構成する該繊維の接点を熱接着させる不織布の製造方
法において、紡糸ノズルとサクションドラムまたはサク
ションコンべアとの中間に平滑な表面を有し回転する円
筒体または平滑な表面を有する回転移動コンべアを設置
し、紡糸ノズルから吐出された繊維の少なくとも一部を
を半固化状態のうちに該回転する円筒体または該回転移
動コンべアの表面に接触させてから前記サクションドラ
ムまたはサクションコンべア上に移動捕集させることを
特徴とする請求項１に記載の不織布の製造方法。12. A fiber, wherein at least one thermoplastic resin component is melted and discharged from a spinning nozzle to produce fibers, and the fibers are deposited and collected on a suction drum or a suction conveyor to form a fiber aggregate. A method for producing a non-woven fabric, in which heat-bonding of the contact points of the fibers constituting the fiber assembly by heat treatment, comprises a rotating cylindrical body or a smooth cylindrical body having a smooth surface between a spinning nozzle and a suction drum or a suction conveyor. A rotating conveyor having a surface is installed, and at least a part of the fibers discharged from the spinning nozzle is brought into contact with the rotating cylinder or the surface of the rotating conveyor in a semi-solid state. The method for producing a nonwoven fabric according to claim 1, wherein the nonwoven fabric is moved and collected on the suction drum or the suction conveyor. 【請求項１３】少なくとも１種の熱可塑性樹脂成分を溶
融して紡糸ノズルから吐出させ繊維とし、該繊維をサク
ションドラム上またはサクションコンべア上に堆積捕集
して繊維集合体とし、続いて熱処理により該繊維集合体
を構成する該繊維の接点を熱接着させる不織布の製造方
法において、紡糸ノズルとサクションドラムまたはサク
ションコンべアとの間に平滑な表面を有し回転する円筒
体または平滑な表面を有する回転移動コンべアを設置
し、紡糸ノズルから吐出された繊維の一部を少なくとも
半固化状態のうちに該回転する円筒体または該回転移動
コンべアの表面に接触させてから前記サクションドラム
またはサクションコンべア上に捕集して繊維集合体
（Ｂ’）とし、前記紡糸ノズルから同時に吐出された繊
維の残部を直接前記サクションドラム上またはサクショ
ンコンべア上に捕集して、該繊維集合体（Ａ’）として
移動させ、前記繊維集合体（Ａ’）と（Ｂ’）とを合流
積層させた後、積層された繊維集合体に熱処理を行うこ
とを特徴とする請求項１に記載の不織布の製造方法。13. A fiber which is melted by discharging at least one kind of thermoplastic resin component from a spinning nozzle to form a fiber, and the fiber is deposited and collected on a suction drum or a suction conveyor to form a fiber aggregate. A method for producing a nonwoven fabric, in which heat-bonding of the contact points of the fibers constituting the fiber assembly by heat treatment is performed, wherein a rotating cylindrical body or a smooth cylindrical body having a smooth surface between a spinning nozzle and a suction drum or a suction conveyor is provided. A rotary moving conveyor having a surface is installed, and a part of the fibers discharged from the spinning nozzle is brought into contact with the rotating cylindrical body or the surface of the rotary moving conveyor in at least a semi-solidified state, The fiber is collected on a suction drum or a suction conveyor to form a fiber aggregate (B '), and the remainder of the fibers simultaneously discharged from the spinning nozzle is directly transferred to the suction cylinder. After being collected on a transfer drum or a suction conveyor and moved as the fiber assembly (A ′), the fiber assemblies (A ′) and (B ′) were merged and laminated, and then laminated. The method for producing a nonwoven fabric according to claim 1, wherein a heat treatment is performed on the fiber assembly.
JP37002898A 1997-12-26 1998-12-25 Nonwoven fabric, method for producing the same, and absorbent article using the same Expired - Fee Related JP4110651B2 (en)

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