[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JP2005220446A - Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same - Google Patents

Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same Download PDF

Info

Publication number
JP2005220446A
JP2005220446A JP2002054281A JP2002054281A JP2005220446A JP 2005220446 A JP2005220446 A JP 2005220446A JP 2002054281 A JP2002054281 A JP 2002054281A JP 2002054281 A JP2002054281 A JP 2002054281A JP 2005220446 A JP2005220446 A JP 2005220446A
Authority
JP
Japan
Prior art keywords
nonwoven fabric
uneven
fibers
fiber
short fibers
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.)
Withdrawn
Application number
JP2002054281A
Other languages
Japanese (ja)
Inventor
Masako Oka
正子 岡
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP2002054281A priority Critical patent/JP2005220446A/en
Priority to AU2003211756A priority patent/AU2003211756A1/en
Priority to PCT/JP2003/002180 priority patent/WO2003072868A1/en
Publication of JP2005220446A publication Critical patent/JP2005220446A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/06Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres by treatment to produce shrinking, swelling, crimping or curling of fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/76Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres otherwise than in a plane, e.g. in a tubular way

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an uneven nonwoven fabric 1 having produced natural and individualizable irregular and uneven crepes. <P>SOLUTION: The nonwoven fabric in which a card web composed of staple fibers having U% thickness unevenness of ±3% or more measured with an Uster measuring instrument and 5-15% shrinkage percentage in boiling water is interlaced at 20-200 g/m<SP>2</SP>basis and 0.15-0.45 g/m<SP>3</SP>apparent density is prepared. The resultant nonwoven fabric is subjected to a heat treatment with hot water at about 100°C without substantially restraining the nonwoven fabric. Thereby, the uneven crepes 2a and 2b are produced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、凹凸状不織布、凹凸状不織布製品及びそれらの製造方法に関し、更に詳細には不規則な凹凸状のシボが発現された凹凸状不織布、凹凸状不織布製品及びそれらの製造方法に関する。
【0002】
【従来の技術】
従来から、ウェブ形成法には各種の製造方法があり、乾式法、スパンボンド法、メルトブロー法、湿式法が例示される。乾式法としては、カード法及びエアレイ法等が0.6デシテックス以上の繊維開繊に好適である。特公平1−40151号公報では、複合繊維からなるウェブをカードで製造し、ニードルパンチする方法が、特開平3−33252号公報では、分割繊維を含有するウェブをカードで製造し、これより太繊度の繊維ウェブを積層し、交絡を行う方法が例示されている。これに対し、湿式法は、繊維径の細い繊維に好適であるといわれている。特開平11−107154号公報では、極細繊維0.8〜5μmのポリトリメチレンテレフタレート繊維ウェブ等が開示されている。不織布に皺や凹凸を発現させるには、プリーツ加工、エンボス加工、皺加工等の加工方法が用いられている。かかる加工方法のうち、プリーツ加工、エンボス加工では、熱セット性を有する繊維素材からなる不織布を折り畳む等して熱セットし、不織布に折り畳み状の皺や凹凸を記憶させる方法である。また、皺加工では、不織布を箱体等に強制的に押し込んで染色加工を施し、或いは熱収縮の大きい糸を部分的に用いた不織布に染色加工を施す等によって、不織布に皺を付与する方法である。
【0003】
【発明が解決しようとする課題】
しかし、従来の加工方法によれば、不織布に所定パターンの皺や凹凸を確実に形成できていない。また、従来の加工方法によって不織布に付与された皺や凹凸は、パターンが人工的で且つ規則的であるため、自然な意外性に欠ける面がある。一方、近年、消費者の自然性嗜好及び個性化志向の強まりに伴い、自然で且つ個性化し得る不規則な凹凸状のシボが発現された不織布や繊維製品が望まれている。そこで、本発明の課題は、自然で且つ個性化し得る不規則な凹凸状のシボが発現された凹凸状不織布であって、しかもその凹凸状のシボが長期間維持される不織布を提供することである。
【0004】
【課題を解決するための手段】
前記目的を達成するために、本発明の不織布は、ウースター測定器で測定したU%が±3%以上の太さ斑を有し、且つ沸水収縮率が5〜15%を有する短繊維で構成されたカードウェブが交絡した不織布であり、その目付量20〜200g/m2であり、かつ見掛け密度が0.15〜0.45g/m3であり、さらに前記不織布に凹凸状のシボが発現されていることを特徴とする。
【0005】
このように、特定の物性を有する繊維を用いた不織布に、例えば、沸騰水による熱処理を行えば、不規則な凹凸状のシボが発現し、しかもその凹凸状のシボは長期間維持できるものである。前記繊維は、ポリ乳酸繊維が好ましい。また、この不織布から製造された衣類等の製品は、凹凸状の不規則なシボが発現されて、個性的なデザインが可能となる。
【0006】
つぎに、本発明の不織布の製造方法は、ウースター測定器で測定したU%が±3%以上の太さ斑を有し、且つ沸水収縮率が5〜15%を有する短繊維で構成されたカードウェブが交絡しており、目付量が20〜200g/m2のであり、かつ見掛け密度が0.15〜0.45g/m3である不織布を準備し、前記不織布を実質的に拘束することなく熱処理を施すことにより凹凸状のシボを発現させる製造方法である。この製造方法により、本発明の不織布が製造できるが、本発明の不織布は、この製造方法に限定されず、他の製造方法で製造してもよい。
【0007】
本発明の製造方法において、カードウェブの交絡は、乾式法若しくは湿式法によることが好ましい。また、前記繊維はポリ乳酸繊維が好ましい。
【0008】
本発明において用いる不織布において、不規則な凹凸状のシボが発現する理由は、次のように考えられる。この不織布を構成する短繊維は、長手方向に太さ斑を有する繊維からなる繊維集合体であるため、長手方向の収縮にも収縮斑が存在する。また、一般に不織布を構成する短繊維同士の交点は、短繊維の交絡等が拘束される拘束点であるため、短繊維の収縮は短繊維同士の交点で規制されるが、本発明で用いる不織布では、不織布の見掛け密度が低密度であるため、短繊維同士の交点において短繊維の収縮が規制される程度は少ない。しかも、短繊維同士の交点における短繊維の拘束力は、不織布の製造工程における短繊維の交絡張力等に依存するが、通常、不織布の製造工程における短繊維の交絡張力等を一定値に保持することは至難のことであり、ある程度のバラツキが存在する。このため、短繊維同士の交点での短繊維の拘束力にも、バラツキが存在する。したがって、短繊維の長手方向の収縮斑と不織布の繊維集合体の交絡張力とに起因する短繊維の収縮差は、不織布を構成する短繊維同士の交点における短繊維の拘束力のバラツキによって更に不規則化される結果、不織布に不規則な凹凸状のシボを発現することができる。
【0009】
【発明の実施の形態】
本発明においては、ウースター測定器で測定したU%(以下、単にU%と称することがある)が±3%以上の太さ斑を有する繊維集合体によって構成され且つ沸水収縮率が5〜15%の短繊維を用いることが重要である。ここで、短繊維を構成する繊維集合体のU%が±3%未満であれば、短繊維の長手方向の収縮斑が少なくなって、不織布に充分な凹凸状のシボを発現することが困難となる。このU%は、±4%以上、特に±5%以上であることが、短繊維の長手方向の収縮斑を更に大きくでき好ましい。なお、U%の上限は、例えば、±13%である。また、沸水収縮率が5%未満の短繊維では、不織布に充分な凹凸状のシボを発現することが困難となり、15%を超える短繊維では、染色等の工程における耐熱性が低下する。
【0010】
かかる短繊維としては、ポリエステルやナイロン等の汎用されている合成繊維から成る短繊維を用いることができるが、ポリ乳酸繊維から成る短繊維を用いることが好ましい。かかるポリ乳酸繊維から成る短繊維を用いて得た不織布や繊維製品は、使用後等に廃棄された場合であっても、土中や水中の微生物によって分解されるため、地球環境上有利である。
【0011】
このポリ乳酸繊維から成る短繊維は、例えば特開2000−80531号公報において記載されている様に、ポリ乳酸樹脂を融点以上に加熱・溶融した後、微小な複数個の吐出孔が形成された紡糸口金から吐出し冷却して得た短繊維を、所定速度で巻き取ることによって得ることができる。巻き取られた短繊維には、必要に応じて延伸を施すことによって、U%が±3%以上の太さ斑を有する繊維集合体によって構成され且つ沸水収縮率が5〜15%のポリ乳酸繊維から成る短繊維を得ることができる。ここで、短繊維に延伸を施す際には、得られる延伸糸の長手方向に太さ斑を積極的に形成すべく、不均一延伸を施してもよい。なお、短繊維としては、ポリ乳酸繊維から成る短繊維と合成繊維または天然繊維とからなるウェブであってもよい。
【0012】
本発明におけるウェブは、ポリ乳酸繊維単独で、あるいは他の繊維と混合して、カード機や気流式ランダムウェバー等の公知の方法により得られる。
【0013】
他の繊維としては、例えば、木綿、麻、レーヨン、ポリアミド、ポリエステル等の有機繊維が使用できる。これらの有機繊維において、後述の熱処理によって変質しないものが好ましい。凹凸状シボの発現や不織布強度の点から、前記有機繊維の含有率は、30重量%未満であることが好ましい。
【0014】
ウェブを構成するポリ乳酸繊維は、1.6〜17デシテックスの太さで、カット長38〜76mmのステープルが好ましい。ウェブの沸水収縮率が50%を超えると、不織布に急激な収縮が起り、不織布に密度斑、修復できない皺が発生して品質を低下させ、仕上げ幅不足等が生じるおそれがある。
【0015】
本発明の不織布は、上記ウェブを積層してニードルパンチ法によって、目付量が20〜200g/m2の繊維相互に交絡・絡合を発生させた不織布から構成されているものを使用する。この方法では、カードウェブをニードルパンチにより緻密化して見掛け密度が0.45g/m3以下のものを得るのが好ましい。更に好ましくは、見掛け密度が0.25〜0.40g/m3の範囲が凹凸状不織布を容易とすることができる。不織布の見掛け密度が0.45g/m3を超える場合には、高密度不織布となって、不織布に凹凸状のシボを発現させることが困難となる。
【0016】
なお、他の機能を有する繊維を不織布に混綿することができる。例えば、繊維集合体の交絡部の強化や不織布強力を強めるため、PVA系バインダー繊維、低融点繊維等を用いることができる。また、肌に触れることで病原菌に対する抵抗力を高めるとともに、保湿性や抗菌・消臭効果を付与するため、キチン・キトサンをレーヨン繊維に溶解したキチン融合繊維等を混合することも有効である。
【0017】
次いで、得られた不織布を実質的に拘束することなく熱処理を施し、不織布に不規則な凹凸状のシボを発現させる。この熱処理は、不織布に染色を施す際に施してもよい。不織布に熱処理を施しつつ染色を施す条件としては、ポリ乳酸繊維から成る短繊維を用いて得た不織布の場合では、浴比が1:5〜1:40で且つ染色温度が100℃とすることが好ましい。
【0018】
また、不織布を実質的に拘束することなく染色するには、染色槽の染色液に不織布を可及的に張力を与えることなく浸漬して染色することが好ましい。また、染色機械によって不織布に連続染色を施す場合においても、不織布に可及的に張力を与えることなく染色する。
【0019】
また、不織布の状態で凹凸状のシボを発現させることなく、不織布を衣服等の繊維製品とした後、繊維製品を実質的に拘束することなく熱処理し、繊維製品を形成する不織布に不規則な凹凸状のシボを発現させてもよい。この場合も、熱処理を繊維製品に染色を施す際に施してもよく、ポリ乳酸繊維から成る短繊維を用いて得た不織布から成る繊維製品では、浴比が1:5〜1:40で且つ染色温度が約00℃の染色条件を採用できる。
【0020】
得られた凹凸状不織布及び凹凸状不織布製品は、凹凸を形成することによって、伸縮性不織布を成し、例えば、約3倍に伸張される伸縮性を有する。これを予め理解したうえで、伸縮性不織布の型入れ等は、ヒップサイズまたはヌードサイズに対して約2〜3倍大きく裁断することによって、着用者に密着しても、着用者に与える圧迫感や窮屈感等を軽減でき、しかも凹凸状不織布の感触の柔らかさと自然な立体感を有する衣服を得ることができる。
【0021】
本発明の不織布製品は、例えば、ブラウス、シャツ等のアウターウェア、インナーウェア等の衣服があげられ、その他、各種カバー等も含まれる。
【0022】
以下、本発明の一例を図面により説明する。
【0023】
図1は、本発明の凹凸状不織布の一例を模式的に示した平面図である。図1(a)は、平面図であり、図1(b)X−X‘方向断面図である。
【0024】
図1(a)において、凹凸状不織布1は、沸水(98〜100℃×20分間)処理した後、自然乾燥した状態にあり、曲線とその周囲の点で示したシボ山2aがある。図中でシボ山2aは不規則な形状で、部分的に途切れ、凹凸を形成している。不規則な凹凸柄は、実質的に拘束することなく熱処理を施し、不織布に凹凸状のシボを発現させることにより得られる。この熱処理は、不織布に染色を施す際に施してもよい。また、不織布を衣服等の不織布製品とした後、不織布製品を実質的に拘束することなく熱処理し、不織布製品を形成する不織布に不規則な凹凸状のシボを発現させてもよい。図1(b)は、(a)のX−X´方向断面図であり、図示のように、凹凸状不織布1において、シボ山2aとシボ谷2bが不規則に幾つも存在していることが判る。
【0025】
ここで、熱処理条件として乾燥熱温度140℃以上を超えないことが好ましい。例えば、アイロンでの製品仕上げの場合、120℃以下が望ましい。
【0026】
【実施例】
実施例により、本発明をさらに具体的に説明する。なお、各例で用いた評価方法を以下に示す。
(1)ウェブの熱収縮率
カード機を用いて作った目付量100g/m2のランダムウェブよりタテ25cm×ヨコ25cmの正方形の試料片を5枚切り取り、クラフト紙(25cm×25cm)に挟んで所定温度(100℃、120℃)の乾燥器中に5分間放置後、室温で30分間冷却し、その面積(Scm2)を測定し、次式より算出する。
ウェブの熱収縮率(%)=100×(625−S)/625
(2)不織布の収縮率
試験片は、原則として不織布の両端末から全幅の10分の1、全幅から100cm離れた部分から3枚、試料に250mmの大きさで採取して、測長区間の長さ20mm間隔で、タテ・ヨコ方向に印を付け、JIS−L1042 6.2B法(沸騰水浸漬法;沸騰水中に30分間)にて処理した後、脱水・自然乾燥させる。次式で算出する。
不織布の収縮率(%)=(L−L´)/L×100
L:処理前の測長区間の長さ(mm)
L´:処理後の測長区間の長さの平均値(mm)
【0027】
(実施例1)
ウースター測定器で測定したU%が±5%の太さ斑であり、かつ沸水収縮率が10%であるポリ乳酸繊維からなる紡績糸用原綿(2.2デシテックス×51mm、12〜14山/25mmクリンプ数)を45重量%(カネボウ合繊(株)製、「ラクトロン」)と、U%が±8%の太さ斑であり、かつ沸水収縮率が10%であるポリ乳酸繊維からなる紡績糸用原綿(3.3デシテックス×76mm、12〜15山/25mmクリンプ数)を55重量%(カネボウ合繊(株)製、「ラクトロン」)とを、混綿した短繊維を準備した。これをカード機に通して、目付量24g/m2のランダムウェブとした。このウェブの収縮率は、14%/100℃、24%/120℃であった。次に、これらのウェブをニードルパンチ絡合装置に移送して、目付量100±10g/m2に設定して、熱処理カレンダー装置を用い熱風温度75℃、滞留時間1分40秒で熱処理して不織布とした。得られた不織布は、目付量115g/m2、沸水収縮率がタテ36%、ヨコ28%で、不規則な凹凸状不織布であった。
【0028】
(実施例2)
実施例1で用いたポリ乳酸繊維の短繊維のウェブと、再生キチン・キトサンセルロース繊維からなるレーヨンステープル(2.7デシテックス×51mm、13〜16山/25mmクリンプ数(オーミケンシ(株)製、「クラビオン」))の目付量22g/m2のランダムウェブとを、水流噴射絡合装置に移送し、孔径0.15mm、ピッチ1.0mmの多数のノズルから30kg/m2の高圧水流を噴きつけ、移送速度35m/分で水流交絡処理し、含水率約124%の積層・絡合ウェブとし、この工程の直前にPVA系バインダー繊維4.2デシテックス×5mm((株)クラレ製)を3重量%吹き付け、爾後の熱処理装置を用い熱風温度110℃、滞留時間2分30秒で熱処理乾燥した。その結果、ポリ乳酸繊維77重量%、レーヨン繊維20重量%、PVA系バインダー繊維3重量%の不織布を得た。得られた不織布は、目付量70g/m2、沸水収縮率がタテ40%、ヨコ37%で、自然な凹凸状の不織布を得ることができた。これを用いて、複数枚のブラウス、シャツに仕立てた後、ウインス型常圧染色槽で袋詰めにした状態で、100℃×20分間染色した。この染色機内では、ブラウス、シャツには何らの張力も付与することなく染色できたので、不規則な凹凸状のシボが発現しており、自然な凹凸状のブラウス、シャツを得ることができた。しかも、各ブラウス、シャツに発現した凹凸状のシボを比較すると、各部位でその発現パターンが異なり雅趣に富んだものであり、シャツの肌さわりがソフト感で良好であった。
【0029】
【発明の効果】
本発明の不織布は、自然で且つ個性化し得る不規則な凹凸状のシボを発現するものであり、これは消費者の自然性嗜好及び個性化志向の強まりに十分対応し得るものである。
【図面の簡単な説明】
【図1】本発明の一実施例の凹凸状不織布の平面図である。
【符号の説明】
1:対象不織布
2a:シボ山
2b:シボ谷
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concavo-convex nonwoven fabric, a concavo-convex nonwoven product, and a method for producing the same, and more particularly relates to a concavo-convex nonwoven fabric, a concavo-convex nonwoven product in which irregular concavo-convex expression is expressed, and a method for producing the same.
[0002]
[Prior art]
Conventionally, there are various production methods for the web forming method, and a dry method, a spunbond method, a melt blow method, and a wet method are exemplified. As a dry method, a card method, an air lay method, etc. are suitable for fiber opening of 0.6 dtex or more. In JP-B-1-40151, a method of manufacturing a web made of a composite fiber with a card and performing needle punching is disclosed in JP-A-3-33252, in which a web containing divided fibers is manufactured with a card. A method of laminating fine fiber fibers and entanglement is illustrated. On the other hand, the wet method is said to be suitable for fibers having a small fiber diameter. Japanese Patent Application Laid-Open No. 11-107154 discloses a polytrimethylene terephthalate fiber web having ultrafine fibers of 0.8 to 5 μm and the like. Processing methods such as pleating, embossing and wrinkling are used to develop wrinkles and irregularities on the nonwoven fabric. Among such processing methods, pleating and embossing are methods in which a non-woven fabric made of a fiber material having heat setting properties is heat-set, for example, so that folded wrinkles and irregularities are stored in the non-woven fabric. In addition, in the wrinkle processing, a method of imparting wrinkles to the nonwoven fabric by forcing the nonwoven fabric into a box or the like to perform dyeing processing, or performing dyeing processing on the nonwoven fabric partially using a yarn having a large heat shrinkage, etc. It is.
[0003]
[Problems to be solved by the invention]
However, according to the conventional processing method, the predetermined pattern of wrinkles and irregularities cannot be reliably formed on the nonwoven fabric. In addition, the wrinkles and irregularities imparted to the nonwoven fabric by a conventional processing method have a natural lack of surprise because the pattern is artificial and regular. On the other hand, in recent years, with the increase in consumer's natural preference and individualization preference, nonwoven fabrics and textile products in which irregular wrinkles that are natural and can be individualized are expressed. Accordingly, an object of the present invention is to provide a concavo-convex nonwoven fabric in which irregular concavo-convex textures that are natural and can be individualized are expressed, and the concavo-convex texture texture can be maintained for a long period of time. is there.
[0004]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the nonwoven fabric of the present invention is composed of short fibers having thickness spots with a U% measured by a Wooster measuring instrument of ± 3% or more and a boiling water shrinkage of 5 to 15%. Is a nonwoven fabric entangled with the card web, the weight per unit area is 20 to 200 g / m 2 , the apparent density is 0.15 to 0.45 g / m 3 , and uneven wrinkles appear in the nonwoven fabric It is characterized by being.
[0005]
In this way, if a non-woven fabric using fibers having specific physical properties is subjected to, for example, heat treatment with boiling water, irregular concavo-convex wrinkles appear, and the concavo-convex wrinkles can be maintained for a long period of time. is there. The fiber is preferably a polylactic acid fiber. Further, products such as clothing manufactured from this nonwoven fabric exhibit irregular irregular textures and can be designed with a unique design.
[0006]
Next, the manufacturing method of the nonwoven fabric of the present invention was composed of short fibers having thickness spots with U% measured by Wooster measuring instrument of ± 3% or more and boiling water shrinkage of 5-15%. card webs are entangled, the basis weight is than 20 to 200 g / m 2, and an apparent density of preparing a nonwoven fabric is 0.15~0.45g / m 3, substantially restrain the non-woven fabric It is a manufacturing method in which uneven texture is expressed by performing heat treatment. Although the nonwoven fabric of this invention can be manufactured with this manufacturing method, the nonwoven fabric of this invention is not limited to this manufacturing method, You may manufacture with another manufacturing method.
[0007]
In the production method of the present invention, the card web is preferably entangled by a dry method or a wet method. The fiber is preferably a polylactic acid fiber.
[0008]
The reason why irregular uneven texture appears in the nonwoven fabric used in the present invention is considered as follows. Since the short fibers constituting the nonwoven fabric are a fiber assembly composed of fibers having thickness spots in the longitudinal direction, shrinkage spots also exist in the contraction in the longitudinal direction. Moreover, since the intersection of the short fibers which generally comprise a nonwoven fabric is a restraint point in which the entanglement etc. of a short fiber are restrained, the shrinkage | contraction of a short fiber is controlled by the intersection of short fibers, but the nonwoven fabric used by this invention However, since the apparent density of the nonwoven fabric is low, the degree to which the shrinkage of the short fibers is regulated at the intersections of the short fibers is small. Moreover, the binding force of the short fibers at the intersections of the short fibers depends on the entanglement tension of the short fibers in the nonwoven fabric manufacturing process, but normally the entanglement tension of the short fibers in the nonwoven fabric manufacturing process is maintained at a constant value. This is extremely difficult, and there is some variation. For this reason, variation also exists in the binding force of the short fiber at the intersection of the short fibers. Therefore, the shrinkage difference of the short fibers due to the shrinkage spots in the longitudinal direction of the short fibers and the entanglement tension of the nonwoven fiber assembly is further reduced due to variations in the restraining force of the short fibers at the intersections of the short fibers constituting the nonwoven fabric. As a result of regularization, irregular uneven textures can be expressed in the nonwoven fabric.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, U% (hereinafter sometimes referred to simply as U%) measured by a Wooster measuring instrument is constituted by a fiber assembly having a thickness spot of ± 3% or more and has a boiling water shrinkage of 5 to 15. % Of short fibers are important. Here, if the U% of the fiber aggregate constituting the short fiber is less than ± 3%, the shrinkage spots in the longitudinal direction of the short fiber are reduced, and it is difficult to develop sufficient uneven texture on the nonwoven fabric. It becomes. The U% is preferably ± 4% or more, and more preferably ± 5% or more because the shrinkage spots in the longitudinal direction of the short fibers can be further increased. Note that the upper limit of U% is, for example, ± 13%. Moreover, it is difficult for the short fibers having a boiling water shrinkage of less than 5% to exhibit sufficient uneven texture on the nonwoven fabric, and the short fibers exceeding 15% reduce the heat resistance in processes such as dyeing.
[0010]
As such short fibers, short fibers made of synthetic fibers such as polyester and nylon can be used, but short fibers made of polylactic acid fibers are preferably used. Nonwoven fabrics and fiber products obtained using short fibers made of polylactic acid fibers are advantageous to the global environment because they are decomposed by microorganisms in the soil and water even when discarded after use. .
[0011]
The short fiber made of polylactic acid fiber is formed with a plurality of minute discharge holes after heating and melting the polylactic acid resin to the melting point or more as described in, for example, Japanese Patent Application Laid-Open No. 2000-80531. The short fiber obtained by discharging from the spinneret and cooling can be obtained by winding at a predetermined speed. The wound short fiber is stretched as necessary to form a polylactic acid having a fiber aggregate having a thickness unevenness of U% of ± 3% or more and a boiling water shrinkage of 5 to 15%. Short fibers made of fibers can be obtained. Here, when the short fiber is stretched, nonuniform stretching may be performed in order to positively form a thick spot in the longitudinal direction of the obtained drawn yarn. In addition, as a short fiber, the web which consists of a short fiber which consists of a polylactic acid fiber, and a synthetic fiber or a natural fiber may be sufficient.
[0012]
The web in the present invention is obtained by a known method such as a card machine or an airflow type random weber by using polylactic acid fibers alone or mixed with other fibers.
[0013]
Examples of other fibers include organic fibers such as cotton, hemp, rayon, polyamide, and polyester. Among these organic fibers, those that do not change in quality by the heat treatment described later are preferable. From the viewpoint of the appearance of uneven texture and the strength of the nonwoven fabric, the content of the organic fiber is preferably less than 30% by weight.
[0014]
The polylactic acid fibers constituting the web are preferably staples having a thickness of 1.6 to 17 dtex and a cut length of 38 to 76 mm. If the boiling water shrinkage of the web exceeds 50%, the nonwoven fabric may undergo rapid shrinkage, density unevenness and wrinkles that cannot be repaired will occur on the nonwoven fabric, and the quality may be degraded, resulting in insufficient finishing width.
[0015]
The nonwoven fabric of this invention uses what is comprised from the nonwoven fabric which laminated | stacked the said web and produced the entanglement and the entanglement of the fibers of 20-200 g / m < 2 > of fabric weights by the needle punch method. In this method, it is preferable that the card web is densified with a needle punch to obtain an apparent density of 0.45 g / m 3 or less. More preferably, the range of the apparent density of 0.25 to 0.40 g / m 3 can facilitate the uneven nonwoven fabric. When the apparent density of a nonwoven fabric exceeds 0.45 g / m < 3 >, it becomes a high-density nonwoven fabric and it becomes difficult to express uneven | corrugated wrinkles on a nonwoven fabric.
[0016]
In addition, the fiber which has another function can be mixed with a nonwoven fabric. For example, in order to strengthen the entangled part of the fiber assembly and strengthen the strength of the nonwoven fabric, PVA binder fibers, low melting point fibers and the like can be used. It is also effective to mix chitin-fused fiber in which chitin / chitosan is dissolved in rayon fiber in order to increase resistance to pathogenic bacteria by touching the skin and to provide moisture retention and antibacterial / deodorant effects.
[0017]
Next, the obtained nonwoven fabric is subjected to heat treatment without substantially restraining it, and irregular nonwoven texture is expressed on the nonwoven fabric. This heat treatment may be performed when dyeing the nonwoven fabric. As a condition for dyeing the nonwoven fabric while performing heat treatment, in the case of the nonwoven fabric obtained using short fibers made of polylactic acid fibers, the bath ratio is 1: 5 to 1:40 and the dyeing temperature is 100 ° C. Is preferred.
[0018]
Moreover, in order to dye | stain a nonwoven fabric without restraining substantially, it is preferable to immerse and dye a nonwoven fabric in the dyeing | staining liquid of a dyeing tank, without giving tension as much as possible. Further, even when continuous dyeing is performed on a nonwoven fabric by a dyeing machine, the nonwoven fabric is dyed without applying as much tension as possible.
[0019]
Also, after making the nonwoven fabric into a textile product such as clothing without causing uneven texture in the nonwoven fabric state, the nonwoven fabric forming the textile product is irregularly heat treated without substantially restraining the textile product. An uneven texture may be developed. Also in this case, the heat treatment may be performed when the fiber product is dyed, and in the fiber product made of nonwoven fabric obtained by using the short fiber made of polylactic acid fiber, the bath ratio is 1: 5 to 1:40 and Dyeing conditions with a dyeing temperature of about 00 ° C. can be employed.
[0020]
The obtained concavo-convex nonwoven fabric and concavo-convex nonwoven product are formed into an elastic nonwoven fabric by forming irregularities, and have, for example, a stretchability that is stretched about three times. With this understanding in advance, the mold of stretchable nonwoven fabric is cut about 2 to 3 times larger than the hip size or nude size, so that even if it is in close contact with the wearer, the feeling of pressure given to the wearer Further, it is possible to reduce the feeling of cramping and the like, and to obtain a garment having a soft feel and a natural three-dimensional feeling of the uneven nonwoven fabric.
[0021]
Nonwoven fabric products of the present invention include, for example, outerwear such as blouses and shirts, clothing such as innerwear, and various other covers.
[0022]
Hereinafter, an example of the present invention will be described with reference to the drawings.
[0023]
FIG. 1 is a plan view schematically showing an example of the uneven nonwoven fabric of the present invention. FIG. 1A is a plan view, and is a cross-sectional view in the XX ′ direction in FIG.
[0024]
In FIG. 1 (a), the uneven nonwoven fabric 1 is in a naturally dried state after being treated with boiling water (98 to 100 ° C. for 20 minutes), and has a grain 2a indicated by a curve and surrounding points. In the drawing, the embossed mountain 2a has an irregular shape and is partially interrupted to form irregularities. Irregular concavo-convex patterns can be obtained by applying heat treatment without substantially restraining the woven fabric so as to develop concavo-convex creases. This heat treatment may be performed when dyeing the nonwoven fabric. Further, after the nonwoven fabric is made into a nonwoven fabric product such as clothes, the nonwoven fabric product may be heat-treated without being substantially restrained, and irregular uneven texture may be expressed in the nonwoven fabric forming the nonwoven fabric product. FIG. 1B is a cross-sectional view in the XX ′ direction of FIG. 1A, and as shown in the figure, in the uneven nonwoven fabric 1, there are irregular number of grain peaks 2 a and grain valleys 2 b. I understand.
[0025]
Here, it is preferable that the drying heat temperature does not exceed 140 ° C. or higher as the heat treatment condition. For example, in the case of product finishing with an iron, 120 ° C. or lower is desirable.
[0026]
【Example】
The present invention will be described more specifically with reference to examples. The evaluation method used in each example is shown below.
(1) Heat shrinkage rate of web From a random web with a basis weight of 100 g / m 2 made using a card machine, 5 square sample pieces of 25 cm x 25 cm are cut and sandwiched between kraft paper (25 cm x 25 cm). After leaving in a drier at a predetermined temperature (100 ° C., 120 ° C.) for 5 minutes, cooling at room temperature for 30 minutes, measuring the area (Scm 2 ), and calculating from the following equation.
Web thermal shrinkage (%) = 100 × (625-S) / 625
(2) The shrinkage rate test piece of the nonwoven fabric is, as a rule, taken from both ends of the nonwoven fabric to 1/10 of the full width, 3 pieces from the part 100 cm away from the full width, and 250 mm in the sample. Marked in the vertical and horizontal directions at intervals of 20 mm in length, treated by the JIS-L1042 6.2B method (boiling water immersion method; 30 minutes in boiling water), then dehydrated and air dried. Calculate with the following formula.
Non-woven fabric shrinkage (%) = (L−L ′) / L × 100
L: Length of measurement section before processing (mm)
L ′: Average length of the length measurement section after processing (mm)
[0027]
(Example 1)
Spun yarn raw cotton (2.2 decitex x 51 mm, 12-14 piles / weight) made of polylactic acid fibers having a thickness of U% measured by a Wooster measuring instrument of ± 5% and a boiling water shrinkage of 10% Spinning made of polylactic acid fiber having a 25 mm crimp number) of 45% by weight (manufactured by Kanebo Synthetic Co., Ltd., “Lactron”), U% is a thickness spot of ± 8%, and boiling water shrinkage is 10%. A short fiber prepared by blending 55% by weight (“Lactron” manufactured by Kanebo Synthetic Co., Ltd.) of raw cotton for yarn (3.3 decitex × 76 mm, 12-15 piles / 25 mm crimp number) was prepared. This was passed through a card machine to obtain a random web having a basis weight of 24 g / m 2 . The shrinkage of this web was 14% / 100 ° C. and 24% / 120 ° C. Next, these webs are transferred to a needle punch entanglement device, set to a basis weight of 100 ± 10 g / m 2 , and heat-treated using a heat treatment calender device at a hot air temperature of 75 ° C. and a residence time of 1 minute and 40 seconds. A non-woven fabric was used. The obtained nonwoven fabric was an irregular uneven nonwoven fabric with a basis weight of 115 g / m 2 , a boiling water shrinkage of 36% and a width of 28%.
[0028]
(Example 2)
A short fiber web of polylactic acid fibers used in Example 1 and a rayon staple (2.7 decitex × 51 mm, 13-16 piles / 25 mm crimp number (Omikenshi Co., Ltd., “ A random web with a basis weight of 22 g / m 2 is transferred to a water jet entanglement device, and a high pressure water flow of 30 kg / m 2 is sprayed from a large number of nozzles having a hole diameter of 0.15 mm and a pitch of 1.0 mm. Then, water entangled at a transfer speed of 35 m / min to obtain a laminated / entangled web having a water content of about 124%. Just before this step, 3 wt. Heat treatment was performed using a heat treatment apparatus after spraying and heating at a hot air temperature of 110 ° C. and a residence time of 2 minutes 30 seconds. As a result, 77% by weight of polylactic acid fiber, 20% by weight of rayon fiber, and 3% by weight of PVA binder fiber were obtained. The obtained nonwoven fabric had a basis weight of 70 g / m 2 , a boiling water shrinkage of 40% and a width of 37%, and a natural uneven nonwoven fabric could be obtained. Using this, after making it into a plurality of blouses and shirts, it was dyed at 100 ° C. for 20 minutes while being packed in a wins-type atmospheric pressure dyeing tank. In this dyeing machine, blouse and shirt could be dyed without applying any tension, so irregular irregular wrinkles appeared, and natural irregular blouse and shirt could be obtained. . Moreover, when comparing the uneven wrinkles appearing in each blouse and shirt, the expression patterns differed in each part and were elegant, and the shirt feel was soft and good.
[0029]
【The invention's effect】
The non-woven fabric of the present invention expresses irregular uneven textures that are natural and can be personalized, and this can sufficiently cope with the consumer's natural taste preference and individualization intensification.
[Brief description of the drawings]
FIG. 1 is a plan view of an uneven nonwoven fabric according to an embodiment of the present invention.
[Explanation of symbols]
1: Target nonwoven fabric 2a: Shibo mountain 2b: Shibo valley

Claims (6)

ウースター測定器で測定したU%が±3%以上の太さ斑を有し、且つ沸水収縮率が5〜15%を有する短繊維で構成されたカードウェブが交絡した不織布であり、その目付量20〜200g/m2であり、かつ見掛け密度が0.15〜0.45g/m3であり、さらに前記不織布に凹凸状のシボが発現されていることを特徴とする凹凸状不織布。U% measured with a Worcester measuring instrument is a non-woven fabric entangled with a card web composed of short fibers having a thickness variation of ± 3% or more and a boiling water shrinkage of 5 to 15%. A concavo-convex nonwoven fabric characterized by having an apparent density of 20-200 g / m 2 , an apparent density of 0.15-0.45 g / m 3 , and concavo-convex wrinkles in the nonwoven fabric. 短繊維が、ポリ乳酸繊維である請求項1記載の凹凸状不織布。  The uneven nonwoven fabric according to claim 1, wherein the short fibers are polylactic acid fibers. 請求項1または2記載の不織布から製造された凹凸状不織布製品。  The uneven | corrugated nonwoven fabric product manufactured from the nonwoven fabric of Claim 1 or 2. ウースター測定器で測定したU%が±3%以上の太さ斑を有し、且つ沸水収縮率が5〜15%を有する短繊維で構成されたカードウェブが交絡しており、目付量が20〜200g/m2のであり、かつ見掛け密度が0.15〜0.45g/m3である不織布を準備し、前記不織布を実質的に拘束することなく熱処理を施すことにより凹凸状のシボを発現させる不織布の製造方法。A card web composed of short fibers having a thickness of U% measured by a Wooster measuring instrument of ± 3% or more and a boiling water shrinkage of 5 to 15% is entangled, and the basis weight is 20 -200 g / m < 2 > and an apparent density of 0.15-0.45 g / m < 3 > is prepared, and uneven | corrugated wrinkles are expressed by heat-processing, without substantially restraining the said nonwoven fabric A method for producing a nonwoven fabric. カードウェブの交絡が、乾式法若しくは湿式法による請求項4記載の製造方法。  The manufacturing method according to claim 4, wherein the card web is entangled by a dry method or a wet method. 短繊維が、ポリ乳酸繊維である請求項4または5記載の製造方法。  The production method according to claim 4 or 5, wherein the short fibers are polylactic acid fibers.
JP2002054281A 2002-02-28 2002-02-28 Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same Withdrawn JP2005220446A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002054281A JP2005220446A (en) 2002-02-28 2002-02-28 Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same
AU2003211756A AU2003211756A1 (en) 2002-02-28 2003-02-27 Uneven nonwoven fabric, uneven nonwoven fabric product and production methods therefor
PCT/JP2003/002180 WO2003072868A1 (en) 2002-02-28 2003-02-27 Uneven nonwoven fabric, uneven nonwoven fabric product and production methods therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002054281A JP2005220446A (en) 2002-02-28 2002-02-28 Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same

Publications (1)

Publication Number Publication Date
JP2005220446A true JP2005220446A (en) 2005-08-18

Family

ID=27764390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002054281A Withdrawn JP2005220446A (en) 2002-02-28 2002-02-28 Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same

Country Status (3)

Country Link
JP (1) JP2005220446A (en)
AU (1) AU2003211756A1 (en)
WO (1) WO2003072868A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007177375A (en) * 2005-12-28 2007-07-12 Komatsu Seiren Co Ltd Method for producing textile product having wrinkle and/or crimp
JP2012177219A (en) * 2012-05-02 2012-09-13 Komatsu Seiren Co Ltd Method for manufacturing wrinkled and/or embossed fiber product
WO2017154871A1 (en) * 2016-03-07 2017-09-14 Jxエネルギー株式会社 Filament nonwaven fabric having wrinkles and method for manufacturing same
US10005255B2 (en) 2013-03-04 2018-06-26 Finetrack Long fiber nonwoven fabric and laminate of fabrics having long fiber nonwoven fabric

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3178243B2 (en) * 1993-05-19 2001-06-18 東レ株式会社 Mixed fiber composite yarn, method for producing the same, and knitted fabric
JP3506288B2 (en) * 1995-06-26 2004-03-15 東洋紡績株式会社 Polyester composite yarn
JP3736014B2 (en) * 1997-03-10 2006-01-18 チッソ株式会社 Laminated nonwoven fabric
JP2000226727A (en) * 1999-02-08 2000-08-15 Toray Ind Inc Aliphatic polyester fiber having denier unevenness

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007177375A (en) * 2005-12-28 2007-07-12 Komatsu Seiren Co Ltd Method for producing textile product having wrinkle and/or crimp
JP2012177219A (en) * 2012-05-02 2012-09-13 Komatsu Seiren Co Ltd Method for manufacturing wrinkled and/or embossed fiber product
US10005255B2 (en) 2013-03-04 2018-06-26 Finetrack Long fiber nonwoven fabric and laminate of fabrics having long fiber nonwoven fabric
WO2017154871A1 (en) * 2016-03-07 2017-09-14 Jxエネルギー株式会社 Filament nonwaven fabric having wrinkles and method for manufacturing same

Also Published As

Publication number Publication date
WO2003072868A1 (en) 2003-09-04
AU2003211756A1 (en) 2003-09-09

Similar Documents

Publication Publication Date Title
US5355565A (en) Process for the production of a non-woven cloth constituted of continuous interconnected filaments and cloth thus obtained
US4560385A (en) Process for the treatment of non-woven sheets and the product obtained
US4172172A (en) Nonwoven fabric of three dimensional entanglement
CN1365405A (en) Bonded-fibre fabric for producing clean-room protective clothing
FI70732C (en) FIBER STRUCTURES WITH FLASHING COMPONENTS
CN106400250B (en) Trimming woven label and preparation method thereof
JP2008297673A (en) Filament nonwoven fabric and method for producing base material for artificial leather
JP2004521194A (en) Abrasion resistant and drapable nonwoven
JP2005220446A (en) Uneven nonwoven fabric, uneven nonwoven fabric product and method for producing the same
JPH08291451A (en) Nonwoven fabric and its production
JP3241517B2 (en) Composite nonwoven fabric and interlining using the same
US4188690A (en) Nonwoven fabric and manufacturing method thereof
US20030213546A1 (en) Extensible nonwoven fabric
US7500292B2 (en) Hydrodynamic treatment of tubular knitted fabrics
WO2003039863A1 (en) Textured nonwoven fabric
KR20030034288A (en) Process for preparing nonwoven composite having cushiony and stretchable property
JP3686308B2 (en) Irregular fabric and method for producing the same, irregular fiber product and method for producing the same
CN108251994B (en) Softening method for spunlace nonwoven fabric and product thereof
JP2009001945A (en) Leather-like sheet and method for producing the same
JPH03137281A (en) Napped fiber sheet and its production
JPS627309B2 (en)
WO2020138029A1 (en) Knitting string and knitted product
JPS602426B2 (en) Method of manufacturing suede-like fabric
JP2006299463A (en) Method for producing filament nonwoven fabric
JPH0147585B2 (en)

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20050906