JP2011219900A - 伸縮不織布およびそれを用いた加工物品 - Google Patents
伸縮不織布およびそれを用いた加工物品 Download PDFInfo
- Publication number
- JP2011219900A JP2011219900A JP2010092577A JP2010092577A JP2011219900A JP 2011219900 A JP2011219900 A JP 2011219900A JP 2010092577 A JP2010092577 A JP 2010092577A JP 2010092577 A JP2010092577 A JP 2010092577A JP 2011219900 A JP2011219900 A JP 2011219900A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fiber layer
- fibers
- heat
- nonwoven fabric
- 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
Links
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Images
Classifications
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
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- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
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- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0207—Elastomeric fibres
- B32B2262/0215—Thermoplastic elastomer fibers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/10—Fibres of continuous length
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- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
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Abstract
【解決手段】熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)が積層され、該熱接着性繊維の熱接着により部分的に形成された熱接着部において両繊維層の繊維が圧着扁平化することなく両繊維層が一体化されており、該熱接着部の間において繊維層(1)が繊維層(1)側に突出した凸状構造を形成している、伸縮性不織布。
【選択図】なし
Description
1.熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)が積層され、該熱接着性繊維の熱接着により部分的に形成された熱接着部において両繊維層の繊維が圧着扁平化することなく両繊維層が一体化されており、該熱接着部の間において繊維層(1)が繊維層(1)側に突出した凸状構造を形成している、伸縮性不織布。
2.繊維層(2)が、螺旋捲縮を発現しうる複合繊維を含み、該複合繊維の螺旋捲縮による繊維間の絡まり合いによって形成されている、前項1に記載の伸縮性不織布。
3.熱接着部の間において、繊維層(1)が、繊維層(1)を構成する複合繊維の熱融着によって該繊維間の交点が接合されている、前項1または2に記載の伸縮性不織布。
4.熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)を積層し、該熱接着性繊維の熱接着によって部分的に形成した熱接着部において両繊維層の繊維を圧着扁平化することなく両繊維層を一体化し、該熱接着部の間において繊維層(1)側に繊維層(1)を突出させて凸状構造を形成させる、伸縮性不織布の製造方法。
5.ポイントスルーエアー加工によって両繊維層の繊維を圧着扁平化することなく両繊維層を熱接着によって部分的に一体化する前項4に記載の製造方法。
繊維層(1)の収縮率は、繊維層(2)の収縮率よりも、好ましくは30%以上、より好ましくは50%以上低い収縮率となることが好ましい。収縮率は後述する実施例の方法により測定することができる。繊維層(1)と繊維層(2)の収縮率の差(繊維層(2)の収縮率―繊維層(1)の収縮率)を30%以上とすることにより、後に形成される表面凹凸形状が大きく、不織布の嵩を増すことができ好ましい。
繊維層(2)は、互いに異なる樹脂成分からなる複合繊維を含む繊維層である。該複合繊維は、螺旋捲縮を発現しうる複合繊維であることが好ましく、潜在捲縮性複合繊維であることがより好ましい。
本発明の伸縮性不織布は、熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)を積層し、両繊維層の繊維を圧着扁平化することなく両繊維層を熱接着によって部分的に一体化し、熱接着部の間において繊維層(1)側に繊維層(1)を突出させて凸状構造を形成させることにより製造する。
各繊維層は、それぞれの構成繊維間が一体化処理されていないウェブの状態で積層することが好ましい。ウェブ化の方法としては、特に限定されず、例えば、カーディング法およびエアレイド法が挙げられる。凸部構造を形成させる点でカーディング法が好ましい。
前処理加工工程の、繊維層(1)と繊維層(2)を圧着扁平化することなく部分的に一体化する手法としては、例えば、一般的な熱風循環式スルーエアー装置の搬送コンベアーと任意のパンチングを施したステンレスベルト(以降パンチングベルトと記す)の間に積層不織布を挟み、これに熱風をあてて、熱風をパンチング部分(開口部)のみ貫通させることによって(後に「熱接着部となる部位」)、両層を一体化する方法等を挙げることができる。パンチングベルトの替わりに開孔を施したローラーを用いて熱風を貫通させてもよい。
収縮加工には、一般的な熱風循環式スルーエアー装置が使用できる。収縮加工における加工温度は、本願発明の構造を有する不織布が得られる限り、ポイントスルーエアー時の加工温度より高くとも、同じであっても、また低くてもよい。好ましくは100℃以上130℃以下の範囲である。
各実施例及び比較例で製造した伸縮性積層シートは以下の測定方法により評価した。
(イ)繊維層(1)及び繊維層(2)
熱処理前のサンプルをMD方向3箇所(中央、両端を測定)の長さを測定し、その平均を(A)値とした。次いで、熱処理後についても同様箇所の長さを測定しその平均を(B)値とし、以下の式により収縮率とした。CD方向についても同様の測定方法にて収縮率求めた。
収縮率(%)=((A)−(B))/(A)×100
不織布を25×25cm、面積625cm2に切り出し、熱処理後のこの不織布の面積を算出して(C)値とし、以下の式により収縮率を求めた。
収縮率(%)=((625)−(C))/(625)×100
島津製作所「オートグラフAG500D」を用いて、試験速度100m/minの速度で試料長100mmから50%伸張後、試料長まで戻し、再度50%伸張時の荷重を初回と再回の2点10%、20%、30%、40%、50%の強度を測定し、強度を縦軸に歪を横軸にとったグラフ(S−Sカーブ)とした。
初回の荷重と再回の荷重の差が大きい程、伸張性が低い。また、伸張と加重のグラフにおいて、傾きが高いほど柔軟性が低いと判断した。
不織布の凸部の中心を通るように垂直に切断し、その断面をKEYENCE社製 デジタルマイクロスコープ「VHX−900」を用いて、その凹部と凸部の厚みを測定し、その差について10ヶ所の平均を求めた。
融点160℃のポリプロピレンと融点130℃のエチレン-プロピレン共重合体からなる並列型複合繊維(容積比:50/50)を用いて、目付10g/m2の繊維層(2)をカーディング法にて作成した。繊維層(2)の収縮率は70%であった。
融点160℃のポリプロピレンと融点130℃のエチレン-プロピレン共重合体からなる並列型複合繊維(容積比:50/50)を用いて、目付20g/m2の繊維層(2)をカーディング法にて作成した。繊維層(2)の収縮率は70%であった。
融点160℃のポリプロピレンと融点130℃のエチレン-プロピレン共重合体からなる、並列型複合繊維(容積比:50/50)を用いて、目付10g/m2の繊維層(2)をカーディング法にて作成した。繊維層(2)70%であった。
融点160℃のポリプロピレンと融点130℃のエチレン-プロピレン共重合体からなる並列型複合繊維(容積比:50/50)を用いて、目付80g/m2のウェブをカーディング法にて作製した。このウェブを、ウォータージェット加工機(大昌鉄工社製)により、7.84Mpaのジェット水流をあて、交絡させた後、120℃の熱風循環式スルーエアー機(壽工業社製)にて、乾燥、収縮処理して不織布を得た。この不織布の収縮率はMD22%、CD9.4%であった。得られた不織布の物性等を表1に示す。
2 熱収縮加工前の繊維層(2)
1’ 熱収縮加工後の繊維層(1)
2’ 熱収縮加工後の繊維層(2)
3 熱接着部(熱接着繊維同士の交点が接着している部位)
4 熱接着部の間(熱接着繊維同士の交点が接着していない部位)
4’ 熱収縮加工後の熱接着部の間(凸状構造形成部)
5 熱接合領域(繊維層(1)と繊維層(2)の界面における熱接合面)
6 空間部
X1−X1’、X2−X2’ 不織布の断面箇所
Claims (5)
- 熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)が積層され、該熱接着性繊維の熱接着により部分的に形成された熱接着部において両繊維層の繊維が圧着扁平化することなく両繊維層が一体化されており、該熱接着部の間において繊維層(1)が繊維層(1)側に突出した凸状構造を形成している、伸縮性不織布。
- 繊維層(2)が、螺旋捲縮を発現しうる複合繊維を含み、該複合繊維の螺旋捲縮による繊維間の絡まり合いによって形成されている、請求項1に記載の伸縮性不織布。
- 熱接着部の間において、繊維層(1)が、繊維層(1)を構成する複合繊維の熱融着によって該繊維間の交点が接合されている、請求項1または2に記載の伸縮性不織布。
- 熱接着性繊維を含む繊維層(1)の少なくとも片面に、互いに異なる樹脂成分からなる複合繊維を含む繊維層(2)を積層し、該熱接着性繊維の熱接着によって部分的に形成した熱接着部において両繊維層の繊維を圧着扁平化することなく両繊維層を一体化し、該熱接着部の間において繊維層(1)側に繊維層(1)を突出させて凸状構造を形成させる、伸縮性不織布の製造方法。
- ポイントスルーエアー加工によって両繊維層の繊維を圧着扁平化することなく両繊維層を熱接着によって部分的に一体化する請求項4に記載の製造方法。
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EP11160390A EP2384881B1 (en) | 2010-04-13 | 2011-03-30 | Nonwoven fabric having stretchability, and process for producing the same |
TW100111047A TWI575132B (zh) | 2010-04-13 | 2011-03-30 | 伸縮不織布及其製造方法 |
CN201110083622.1A CN102233693B (zh) | 2010-04-13 | 2011-03-30 | 伸缩无纺布及其制造方法 |
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JP2008144321A (ja) * | 2006-12-12 | 2008-06-26 | Kao Corp | 不織布 |
Cited By (5)
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WO2014074788A1 (en) | 2012-11-08 | 2014-05-15 | 3M Innovative Properties Company | Nonwoven and stretchable laminate |
WO2014157280A1 (ja) * | 2013-03-28 | 2014-10-02 | Jnc株式会社 | 不織布およびそれを用いて得られた製品 |
JP2014194090A (ja) * | 2013-03-28 | 2014-10-09 | Jnc Corp | 不織布およびそれを用いて得られた製品 |
JP2015190065A (ja) * | 2014-03-27 | 2015-11-02 | 日本バイリーン株式会社 | 不織布及びその製造方法 |
US11826229B2 (en) | 2015-05-29 | 2023-11-28 | Kuraray Co., Ltd. | Fibrous sheet |
Also Published As
Publication number | Publication date |
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EP2384881B1 (en) | 2012-08-22 |
US20110250390A1 (en) | 2011-10-13 |
TWI575132B (zh) | 2017-03-21 |
EP2384881A1 (en) | 2011-11-09 |
TW201134998A (en) | 2011-10-16 |
CN102233693B (zh) | 2016-01-20 |
JP5703586B2 (ja) | 2015-04-22 |
CN102233693A (zh) | 2011-11-09 |
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