JPH02300365A - Heat shrinkable nonwoven sheet rich in developability of bulkiness and production thereof - Google Patents
Heat shrinkable nonwoven sheet rich in developability of bulkiness and production thereofInfo
- Publication number
- JPH02300365A JPH02300365A JP1120370A JP12037089A JPH02300365A JP H02300365 A JPH02300365 A JP H02300365A JP 1120370 A JP1120370 A JP 1120370A JP 12037089 A JP12037089 A JP 12037089A JP H02300365 A JPH02300365 A JP H02300365A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- fiber
- sheet
- heat
- nonwoven sheet
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims abstract description 107
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009835 boiling Methods 0.000 claims abstract description 6
- 238000005304 joining Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 2
- 238000004049 embossing Methods 0.000 abstract description 12
- 239000005022 packaging material Substances 0.000 abstract description 8
- 238000010030 laminating Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 17
- 238000009987 spinning Methods 0.000 description 14
- 239000002356 single layer Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 230000002040 relaxant effect Effects 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920006300 shrink film Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- UUAGPGQUHZVJBQ-UHFFFAOYSA-N Bisphenol A bis(2-hydroxyethyl)ether Chemical compound C=1C=C(OCCO)C=CC=1C(C)(C)C1=CC=C(OCCO)C=C1 UUAGPGQUHZVJBQ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012771 household material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は熱収縮特性、捲縮発現性と表面耐毛羽性に優れ
た不織シート及びその製法に関する。かかる不織シート
は各種収縮包装材料として利用される。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nonwoven sheet with excellent heat shrinkage properties, crimp development properties, and surface fuzz resistance, and a method for producing the same. Such nonwoven sheets are used as various shrink wrapping materials.
包装分野で製品を包装する手段として収縮フィルムを利
用した収縮包装が、複雑な形状の製品をコンパクトに包
装できることと、包装工程の効率化のため浩、速に普及
している。かかる現状に鑑み、収縮包装材料に対する要
求も高度化しており、その一つに製品保護のためのクツ
シラン性、あるいは製品イメージの高級化の面から加飾
、意匠性に優れた収縮包材が求められている。従来、こ
の用途には塩化ビニルの収縮フィルムが大量に用いられ
ているが、これらフィルムの場合は引裂強度が弱いこと
、印刷など加飾を施しても外観品位が平板で高級感に欠
番することなどからその使用範囲が限られていた。2. Description of the Related Art Shrink wrapping, which uses shrink films as a means of wrapping products in the packaging field, is rapidly becoming popular due to its ability to compactly package products with complex shapes and to improve the efficiency of the packaging process. In view of this current situation, the requirements for shrink packaging materials are becoming more sophisticated, and one of them is the demand for shrink packaging materials with excellent decorativeness and design in order to protect the product, as well as to enhance the image of the product. It is being Conventionally, a large amount of vinyl chloride shrink film has been used for this purpose, but these films have low tear strength, and even when decorated with printing or other decorations, the appearance is flat and lacks a luxurious appearance. The scope of its use was limited due to such reasons.
本発明者等は、かかる従来の収縮フィルムのもつ問題点
を解決した新規な包材として特開昭６１−１７４４６３
号公報、同６２−６９８７２号公報、同６２−６９８７
５号公報などで熱収縮性の不織シートを提案している。The present inventors have developed a new packaging material that solves the problems of conventional shrinkage films in Japanese Patent Application Laid-Open No. 61-174463.
No. 62-69872, No. 62-6987
A heat-shrinkable nonwoven sheet has been proposed in Publication No. 5 and others.
これらの提案で得られるシートは、引裂強度、通気性、
結露防止性あるいはファプリツタ調の高級な表面品位な
ど従来のフィルム素材にない特徴をもった収縮包装材料
として高（評価されているが、一方、包装工程での加熱
収縮処理により不織シートの繊維密度が増大し、風合が
硬化、繊維素材のソフトなふ（らみのある感触が失われ
るという問題があった。The sheets obtained with these proposals have tear strength, breathability,
It is highly regarded as a shrink packaging material with features not found in conventional film materials, such as anti-condensation properties and a high-grade surface quality similar to that of a fabric. There was a problem in that the texture increased, the texture hardened, and the soft and fluffy feel of the fiber material was lost.
かかる技術的現状に鑑み、本発明は潜在収縮性を有し、
表面の耐摩耗性に優れ、熱収縮処理での風合硬化がなく
嵩高発現性の大きい不織シートを提供することにある。In view of the current state of the art, the present invention has latent shrinkage,
The object of the present invention is to provide a nonwoven sheet that has excellent surface abrasion resistance, is free from texture hardening during heat shrinkage treatment, and has high bulkiness.
本発明の一つの発明は、熱収縮性の異なる２種類の繊維
形成性のポリマーを繊維横断面に於いて偏心的に配置し
た複合繊維から成る長繊維不織ウェブが複数Ｎ積層され
部分熱融着によって接合一体化された長繊維不織シート
であって、シート中の部分熱融着部を連結する繊維は潜
在捲縮性を有しており、該シートの湧水収縮率が少なく
とも一方向に２０％以上である事を特徴とする熱収縮性
不織シート、であり、もうひとつの発明は、熱収縮性の
異なる繊維形成性ポリマーを、繊維横断面に於て偏心的
に配置した複合繊維からなる長繊維不織ウェブを、複数
層積層し、表面にエンボス模様を有するロールと超音波
発振ホーンの間隙で処理し、エンボス凸部にあたる繊維
を融着固定し接合一体化する事を特徴とする熱収縮性長
繊維不織シートの製法、である。One of the inventions of the present invention is that a plurality of N long-fiber nonwoven webs made of composite fibers in which two types of fiber-forming polymers with different heat shrinkability are arranged eccentrically in the cross section of the fibers are laminated and partially heated. It is a long fiber nonwoven sheet that is joined and integrated by bonding, and the fibers that connect the partially heat-fused parts in the sheet have latent crimpability, and the spring water shrinkage rate of the sheet is at least in one direction. Another invention is a heat-shrinkable non-woven sheet characterized by a heat-shrinkable non-woven sheet having a heat-shrinkability of 20% or more. It is characterized by laminating multiple layers of long-fiber nonwoven webs made of fibers, processing them between a roll with an embossed pattern on the surface and an ultrasonic oscillation horn, and fusing and fixing the fibers in the embossed convex parts to integrate them. This is a method for producing a heat-shrinkable long fiber nonwoven sheet.
本発明の長繊維不織シートは熱収縮性の異なる２種類の
繊維形成性のポリマーを繊維横断面に於て偏心的に配置
した複合繊維からなる長繊維不織ウェブが複数層積層さ
れ、部分熱融着によって接合一体化された多層構造とな
っているため、同質の繊維からなる単層構造の同目付の
不織シートに比べて、熱収縮処理時の嵩高性の発現度が
非常に大きい特徴を有している。The long-fiber nonwoven sheet of the present invention is made by laminating multiple layers of long-fiber nonwoven webs made of composite fibers in which two types of fiber-forming polymers with different heat shrinkability are arranged eccentrically in the cross section of the fibers. Because it has a multilayer structure that is integrated by heat fusion, the bulkiness during heat shrinkage treatment is much greater than that of a nonwoven sheet with a single layer structure made of the same fibers and the same basis weight. It has characteristics.
これは、該不織シートにリラックス熱処理を施す事でシ
ート中の繊維自体が熱収縮を起こすのに加え多層に積層
された繊維の有す潜在捲縮性が顕在化し、シート全面に
点在する繊維の融着部分が微小なコイル状の捲縮繊維に
よって連結された多層構造の不織シートが得られること
によるものである。This is because when the nonwoven sheet is subjected to relaxing heat treatment, the fibers in the sheet themselves undergo heat shrinkage, and the latent crimp properties of the multilayered fibers become apparent, causing the fibers to be scattered over the entire surface of the sheet. This is because a nonwoven sheet with a multilayer structure in which the fused portions of fibers are connected by tiny coiled crimped fibers can be obtained.
この効果を、模式図を用いて更に詳しく説明する。第４
図Ａは単層構造の不織シートである。第４図Ｂはこれを
熱収縮処理を施した時の構造の変化を示すものである。This effect will be explained in more detail using schematic diagrams. Fourth
Figure A shows a nonwoven sheet with a single layer structure. FIG. 4B shows the change in structure when this is subjected to heat shrinkage treatment.
ここで、（７）は熱収縮性の異なる種類の繊維形成性ポ
リマーをサイドバイサイド型、あるいは偏心鞘芯型複合
繊維で該繊維は、熱処理を施すと個我縮分の収縮に伴い
微細なコイル状捲縮が発現する潜在捲縮性を有している
。（８）は部分熱融着部でシートに引張強度、耐摩擦性
などの機能を付与している。単層構造の不織シートは第
４図Ａに示す様にシート内において長繊維はシートの流
れ方向、中方向、厚さ方向に三次元的にランダムに配向
している。該不織シートに熱処理を施して繊維の捲縮を
発現させた場合、厚さ方向に配向している繊維は厚さを
減少させる方向に収縮応力が作用する。そして流れ方向
、巾方向に配向している繊維の捲縮発現を抑制する。こ
の現象は特に繊維密度の高く、繊維一本の当りの占有空
間の小さい厚目付品になる程捲縮発現が抑制され易く、
熱処理後の不織シートの嵩高発現性も小さくなる。Here, (7) is a side-by-side type or eccentric sheath-core type composite fiber made of different types of fiber-forming polymers with different heat shrinkability. It has a latent crimp property that causes crimp. (8) is a partially heat-sealed portion that imparts functions such as tensile strength and abrasion resistance to the sheet. As shown in FIG. 4A, in a nonwoven sheet having a single layer structure, long fibers are randomly oriented three-dimensionally in the machine direction, middle direction, and thickness direction of the sheet. When the nonwoven sheet is heat-treated to develop fiber crimp, shrinkage stress acts on the fibers oriented in the thickness direction in a direction that reduces the thickness. This suppresses crimp development of fibers oriented in the flow direction and width direction. This phenomenon is more likely to be suppressed when the fiber density is high and the space occupied by each fiber is small.
The bulkiness of the nonwoven sheet after heat treatment is also reduced.
これに対して、第５図Ａの様に潜在捲縮性繊維からなる
不織ウェブを複数層積層し部分熱融着によって接合一体
化した不織シートは、厚さ方向に配向する繊維が少なく
シート表面から裏面に達する繊維は存在しないため、熱
処理を施した際の厚さ方向に作用する形態収縮応力は極
めて小さく、流れ方向、中方向に配向している繊維は収
縮の捲縮発現によって目付が増す効果以上に大巾にシー
トの厚みが増し、得られた不織シート（第５図Ｂ）は非
常に嵩高性、クッション性に富んだものとなる。On the other hand, a nonwoven sheet made by laminating multiple layers of nonwoven webs made of latent crimpable fibers and joining them together by partial heat fusion, as shown in Figure 5A, has fewer fibers oriented in the thickness direction. Since there are no fibers that reach the back surface from the front surface of the sheet, the form shrinkage stress that acts in the thickness direction during heat treatment is extremely small, and the fibers oriented in the machine direction and the middle direction have a reduced fabric weight due to the appearance of shrinkage crimps. The thickness of the sheet increases to a greater extent than the effect of increasing the amount of water, and the obtained nonwoven sheet (FIG. 5B) becomes extremely bulky and rich in cushioning properties.
積層構造を構成する各層の目付は５０ｇ／ｒｒｒ以下更
に好ましくは２０ｇ／ｎｆ以下である。各単層の目付が
必要以上に大きいと、各層内で厚さ方向に繊維の配列本
数が増し、前述した様に嵩高発現性が低下するため、目
付の大きい不織ウェブを複数層積層しても、やはり嵩高
発現性は乏しいものとなってしまう。The basis weight of each layer constituting the laminated structure is 50 g/rrr or less, more preferably 20 g/nf or less. If the basis weight of each single layer is larger than necessary, the number of fibers arranged in the thickness direction will increase in each layer, and as mentioned above, the bulkiness will decrease. Therefore, multiple layers of nonwoven webs with large basis weights are laminated. However, the bulkiness is still poor.
本発明の長繊維不織シートの目付は、２０〜１５０ｇ／
％が好ましく、熱収縮処理した捲縮発現後の不織シート
の各用途に適した必要目付によって任意に選定できる。The basis weight of the long fiber nonwoven sheet of the present invention is 20 to 150 g/
%, and can be arbitrarily selected depending on the required basis weight suitable for each use of the nonwoven sheet after heat shrinkage treatment and crimping.
最終製品の目付として厚目付品が要求される場合は、積
Ｎ層数を増やした構造の不織シートとすればよい。If a thicker product is required for the final product's basis weight, a nonwoven sheet with a structure in which the number of stacked N layers is increased may be used.
本発明の不織シートをショートループ熱処理機、ピンテ
ンター等の装置を用いてリラックス熱処理する事によっ
て得られたシートは、第６図Ｂのようにシート全面に点
在する繊維の部分熱融着部が微小なコイル状の捲縮繊維
によって連結された構造であるため、従来の単層の捲縮
長繊維が部分熱融着結合された不織シートに比ベペーパ
ーライク惑のない極めて柔軟な風合物性のものである事
を示している。特に収縮処理後のシートの風合（柔軟性
）を重視した用途には、熱収縮率が小さくＩを縮発現率
の大きい繊維を選択するのが好ましい。The sheet obtained by subjecting the nonwoven sheet of the present invention to relaxing heat treatment using a device such as a short loop heat treatment machine or a pin tenter has partially heat-fused portions of fibers scattered over the entire surface of the sheet as shown in Figure 6B. Because the structure is connected by minute coiled crimped fibers, it is extremely flexible and does not feel paper-like compared to conventional non-woven sheets in which a single layer of crimped long fibers is partially bonded by heat fusion. This indicates that it is a compound. In particular, for applications where emphasis is placed on the feel (flexibility) of the sheet after shrinkage treatment, it is preferable to select fibers with a low heat shrinkage rate and a high shrinkage rate I.
本シートに含まれる三次元コイル状の微細捲縮繊維は、
低荷重下においても伸びが大きくかつ優れた伸長回復性
を示す捲縮弾性を有しているため、該繊維から構成され
る不織シートは、単層の捲縮長繊維不織シートに比べ極
めて低応力で伸長し形態追従性に富、伸長回復性に優れ
た特徴も合わせ持っている。The three-dimensional coiled fine crimped fibers contained in this sheet are
Because it has crimped elasticity that shows high elongation and excellent elongation recovery even under low loads, nonwoven sheets made of these fibers have extremely high elongation properties compared to single-layer crimped filament nonwoven sheets. It stretches with low stress, has good conformability to shape, and has excellent stretch recovery properties.
以上のような緒特性を不織シートに与えるためには、シ
ート全面に点在する繊維の部分熱融着部を連結する長繊
維が、隣接する部分熱融着部の間において２個以上（好
ましくは５個以上）のコイル状捲縮を有している事が必
要であるが、この捲縮の個数は、ポリマーの組合せ等の
紡糸条件、及びリラックス熱処理時プロセス、工程張力
等の条件の選択により、用途、目的に応じて調整可能で
ある。 このように本発明の不織シートは、熱処理等の
後加工を施す事により形態追従性と伸長回復性を有する
包装材料、生活資材、などの新規素材としても高い可能
性を有しているといえる。In order to provide the above-mentioned properties to a nonwoven sheet, it is necessary to have two or more long fibers that connect the partially heat-sealed parts of the fibers scattered over the entire surface of the sheet between adjacent partially heat-sealed parts. It is necessary to have coil-like crimps (preferably 5 or more), but the number of crimps depends on the spinning conditions such as the combination of polymers, the process during relaxing heat treatment, the process tension, etc. It can be adjusted depending on the use and purpose by selection. In this way, the nonwoven sheet of the present invention has high potential as a new material for packaging materials, household materials, etc., which has shape conformability and elongation recovery properties by performing post-processing such as heat treatment. I can say that.
次に、本発明の熱収縮性長繊維不織シートは、熱収縮性
の異なる繊維形成性ポリマーを、繊維横断面に於て偏心
的に配置した複合繊維からなる長繊維不織ウェブを、複
数層積層し表面にエンボス模様を有するロールと超音波
発振ホーンの間隙で処理し、エンボス凸部にあたる繊維
を融着固定する事を特徴とする製法によって得られる。Next, the heat-shrinkable long-fiber nonwoven sheet of the present invention consists of a plurality of long-fiber nonwoven webs made of composite fibers in which fiber-forming polymers with different heat-shrinkability are arranged eccentrically in the cross section of the fibers. It is obtained by a manufacturing method characterized in that the fibers are laminated and treated in a gap between a roll having an embossed pattern on the surface and an ultrasonic oscillation horn, and the fibers corresponding to the embossed convex portions are fused and fixed.
本発明の不織シートは複合紡糸を利用したスパンボンド
法により得られる。連続フィラメントを構成する一成分
は繊維形成能を有する熱可塑性ポリマーであり、ポリエ
チレンテレフタレート、ポリアミド、ポリプロピレン、
ポリエチレン等の単独ポリマーが選択されるが、共重合
体、ブレンド物であってもよい、又、他の成分はこれと
は熱収縮性の異なる熱収縮性ポリマーであり、前記単独
ポリマーに対して高い収縮能力をもった共重合体やブレ
ンド物が使用出来る。The nonwoven sheet of the present invention is obtained by a spunbond method using composite spinning. One component constituting the continuous filament is a thermoplastic polymer with fiber-forming ability, such as polyethylene terephthalate, polyamide, polypropylene,
A single polymer such as polyethylene is selected, but a copolymer or a blend may also be used.The other component is a heat-shrinkable polymer having a different heat-shrinkability from the single polymer. Copolymers and blends with high shrinkage ability can be used.
そして熱収縮性の異なる２種の熱可塑性ポリマーからな
る複合繊維は、その横断面に於て成分が偏心的に配置さ
れていることが必要であり、サイドバイサイド型や偏心
鞘芯型の配置が好ましい。Composite fibers made of two types of thermoplastic polymers with different heat shrinkability require components to be arranged eccentrically in the cross section, and side-by-side or eccentric sheath-core arrangement is preferable. .
潜在１壱縮性複合連続フィラメントウェブを得るために
は、二つ以上の押出機を有し、多数のノズルを有する第
１図の如き紡糸口金（１）を用い、溶融した重合体を上
記の如き偏心的配置にして複合構造として吐出し、糸条
をエアサッカー（２）によって高速牽引し、金網ネット
ジンベア（３）上などに分散し長繊維不織ウェブ（４）
として捕集する。ここでいう複合繊維の潜在的熱捲縮性
は複合繊維を構成する成分の組み合せ、配置方法や割合
、繊維の太さや断面形状、及び紡糸速度等の紡糸条件に
よって調整することが可能である。In order to obtain a composite continuous filament web with latent 1 shrinkage, a spinneret (1) as shown in FIG. The yarns are discharged as a composite structure in an eccentric arrangement, and the yarns are pulled at high speed by an air sucker (2) and dispersed on a wire net ginbear (3) to form a long fiber nonwoven web (4).
Collect as. The potential thermal crimpability of the conjugate fiber as referred to herein can be adjusted by the combination of components constituting the conjugate fiber, arrangement method and ratio, fiber thickness and cross-sectional shape, and spinning conditions such as spinning speed.
本発明の不織シートを構成する繊維は、清水処理後に於
いて２０個／２．５４ＣＩ以上、好ましくは３０〜１０
０個７２．５４Ｃ１１の捲縮が発現出来るよう上記紡糸
条件を選択することが好ましい。さらに、本発明におい
ては、シートを構成する繊維が高い潜在捲縮発現能力を
持つと同時に、シート中でそれらの繊維群がその捲縮発
現能力を十分発揮出来る状態に維持されていることが重
要なポイントである。The fibers constituting the nonwoven sheet of the present invention are 20 pieces/2.54 CI or more, preferably 30 to 10 pieces after clear water treatment.
It is preferable to select the above-mentioned spinning conditions so that 0 72.54C11 crimps can be produced. Furthermore, in the present invention, it is important that the fibers constituting the sheet have a high potential crimp ability, and at the same time that the fiber groups in the sheet are maintained in a state where they can fully demonstrate their crimp ability. This is a great point.
また、本発明の積層不織シートを得るためには、第１図
に示した紡糸設備を複数台流れ方向に並べた形式である
第３図の様な設備を用いて連続的に得る事もできるし、
第１図の設備で得た長繊維ウェブに一旦、仮接合を施し
て巻取ったシートを再度巻戻して積層させる方法をとっ
てもよい。この仮接合の際には必ずしも不織シートに強
度物性、耐摩擦性を与える事は必要ではなく、得られる
仮接合後の不織シート中の部分熱融着部を連結する繊維
が潜在捲縮性を残す様な接合方法であれば、例えば、超
音波ボンディング法や、収縮成分の二次転移温度以下の
温度でのエンボスロールを用いた部分熱融着法などの方
法をとる事ができる。In addition, in order to obtain the laminated nonwoven sheet of the present invention, it is also possible to continuously obtain the laminated nonwoven sheet using the equipment shown in Fig. 3, which has a plurality of spinning equipment shown in Fig. 1 arranged in the flow direction. I can and
A method may also be used in which the long fiber web obtained using the equipment shown in FIG. 1 is temporarily bonded and the sheets are wound up again and laminated. During this temporary bonding, it is not necessarily necessary to impart strength and abrasion resistance to the nonwoven sheet, and the fibers connecting the partially heat-fused portions in the nonwoven sheet after temporary bonding are latent crimped. As long as the bonding method maintains the properties, for example, an ultrasonic bonding method or a partial heat fusion method using an embossing roll at a temperature below the secondary transition temperature of the shrinkage component can be used.
つぎに、ボンディング方法について述べる。一方の表面
にエンボス模様を有する一対の加熱エンボスロールを使
用しシートを構成する繊維を部分的に熱圧着させる部分
熱圧着法がある。この方法を用い本発明のシートを構成
する繊維同志を十分に固定するには複合繊維の低融点成
分の融点近傍の温度条件で熱圧着させる事が必要である
、この際、シート中の繊維はエンボス凸部では無捲縮の
状態で固定されてしまうとともに、エンボス凸部以外の
部分も融点近傍の熱を受は収縮成分の熱固定がおこり繊
維の潜在捲縮発現能力も失われてしまう。従って得られ
た不織シートは熱収縮特性が失われ、風合など本発明の
目的を満たすことができないものとなってしまう、繊維
の潜在捲縮発現能力を維持するためには出来るだけ低温
度、好ましくは収縮成分の二次転移温度以下でエンボス
処理をする事が必要である。しかし、この二次転移温度
以下の低温ではシート中での繊維同志の固定が不十分な
ため得られる不織シートの引張強度、眉間剥離強度、表
面摩擦強度などが劣り、特に包装材料用途等での要求性
能を満すことができない。Next, the bonding method will be described. There is a partial thermocompression method in which a pair of heated embossing rolls having an embossed pattern on one surface are used to partially thermocompress the fibers constituting the sheet. In order to sufficiently fix the fibers constituting the sheet of the present invention using this method, it is necessary to heat and press the fibers in the sheet at a temperature close to the melting point of the low melting point component of the composite fiber. At the embossed convex portions, the fibers are fixed in a non-crimped state, and if the portions other than the embossed convex portions also receive heat near the melting point, the shrinkage components are heat-fixed, and the fiber's ability to develop latent crimp is lost. Therefore, the obtained nonwoven sheet loses its heat shrinkage properties and cannot meet the objectives of the present invention, such as texture.In order to maintain the ability of the fibers to develop latent crimp, the temperature must be kept as low as possible. It is necessary to perform the embossing process preferably at a temperature below the second-order transition temperature of the shrinkage component. However, at low temperatures below this second-order transition temperature, the fibers in the sheet are not sufficiently fixed together, resulting in poor tensile strength, glabellar peel strength, surface friction strength, etc., especially for packaging material applications. cannot meet the required performance.
この点に関し、本発明においては、複数層の潜在捲縮性
複合長繊維ウェブを積層し、これに超音波によるボンデ
ィングを施すことにより、本発明の不織シートを効果的
に製造する方法を可能にしたものである。In this regard, the present invention enables a method for effectively manufacturing the nonwoven sheet of the present invention by laminating multiple layers of latent crimpable composite long fiber webs and subjecting them to ultrasonic bonding. This is what I did.
超音波ボンディングは第２図に示すようなエンボスロー
ル（６）と長音波発振ホーン（５）を組合せた装置（商
品名；ピンソニック二日光商事代）を用い、エンボスロ
ールと超音波発振子の間で不織ウェブに超音波エネルギ
ーを印加し、処理、エンボスロールの凸部模様に当る繊
維を超音波エネルギーにより自己発熱、融着させること
によって複数層のウェブを接合一体化させる。Ultrasonic bonding uses a device (product name: Pinsonic Nikko Shojiyo) that combines an embossing roll (6) and a long-wave oscillation horn (5) as shown in Figure 2. Ultrasonic energy is applied to the nonwoven web in between, and the fibers that are in contact with the convex pattern of the embossing roll are self-heated and fused by the ultrasonic energy, thereby joining and integrating the multiple layers of the web.
このようにして、得られた不織シートはシート全面に点
在する融着部分で構成繊維が固定され、それら融着部分
が潜在捲縮性の複合繊維で連結された構造を有している
。In this way, the obtained nonwoven sheet has a structure in which the constituent fibers are fixed in fused parts scattered over the entire surface of the sheet, and these fused parts are connected by latent crimp composite fibers. .
超音波ボンディング法においては、熱融着部以外の繊維
には実質的に熱覆歴が加わらず、ウェブ化時点での繊維
の潜在捲縮発現能力が維持されたままの状態で繊維が固
定されるため、該シートは、捲縮発現性（熱収縮性）と
引張強度、眉間剥離強度、表面摩擦性などの強度物性を
兼ね備えた、本発明の目的を十分に充すものとなる。In the ultrasonic bonding method, there is virtually no heat coverage applied to the fibers other than the heat-fused portion, and the fibers are fixed while maintaining their latent crimp ability at the time of web formation. Therefore, the sheet fully satisfies the object of the present invention, having crimpability (heat shrinkability) and strong physical properties such as tensile strength, glabellar peel strength, and surface friction properties.
超音波ボンディングの条件はボンディング圧力、圧着面
積、圧着部の形状パターンなどであるが、シートの意匠
性、強度、風合など目的に応じて任意に選択される。ソ
フトな風合、感触を狙うためには圧着面積が１〜２０％
、好ましくは１〜１０％であることが好ましい。Conditions for ultrasonic bonding include bonding pressure, crimped area, shape pattern of the crimped part, etc., and are arbitrarily selected depending on the purpose, such as the design, strength, and texture of the sheet. In order to achieve a soft texture and feel, the crimping area should be 1 to 20%.
, preferably 1 to 10%.
なお、本発明の熱収縮性長繊維不織シートを得るために
は、熱融着部分において、繊維相互が十分な接合強力を
もって固定され、かつ熱融着部以外の繊維に実質的に熱
覆歴の加わらないような方法であれば上記超音波ボンデ
ィング以外の方法をとる事も可能である。In order to obtain the heat-shrinkable long-fiber nonwoven sheet of the present invention, it is necessary that the fibers are fixed with sufficient bonding strength in the heat-sealed portion, and that the fibers other than the heat-sealed portion are substantially heat-covered. It is also possible to use methods other than the above-mentioned ultrasonic bonding as long as the method does not add any damage.
以下、本発明を実施例により具体的に説明する。 Hereinafter, the present invention will be specifically explained with reference to Examples.
なお、本明細書中で用いられる各種特性値の定義および
測定方法を以下に示す。Note that the definitions and measurement methods of various characteristic values used in this specification are shown below.
く繊維の沸水収縮率、捲縮率〉
１００ｍｇ／ｄ荷重下での試料長さをＬｏとし、荷重を
取り除き導水中で３分間処理した後の２ ｍｇ／ｄの荷
重下での繊維長をＬｌ、再度１００ｍｇ／ｄの荷重下で
の繊維長をＬ２とすると、沸水収縮率、捲縮率は、
で表わされる。なお測定はｎ＝５の平均値で求めた。Boiling water shrinkage rate and crimp rate of fibers〉 Lo is the sample length under a load of 100 mg/d, and Ll is the fiber length under a load of 2 mg/d after the load is removed and treated in water for 3 minutes. , If the fiber length under a load of 100 mg/d is again L2, the boiling water shrinkage rate and crimp rate are expressed as follows. Note that the measurement was performed using the average value of n=5.
く繊維の捲縮数〉
繊維に任意区間を２個所マーキングし、２■／ｄ荷重下
の状態で、その区間内にある捲縮の山の数を数え、１０
０■／ｄの荷重下で区間長（繊維実長）を測り、２．５
４ｃ璽当たりの捲縮数に換算して求める。Number of crimps in the fiber Mark two arbitrary sections on the fiber, count the number of crimps in that section under a 2/d load, and calculate the number of crimps in the section.
The section length (actual fiber length) was measured under a load of 0■/d, and the result was 2.5
Calculate the number of crimps per 4c seal.
く目 （寸〉
試験片３０ＣＩＩＸ３０（１ｍを取り、その重量を測り
、目付に換算して表わす。Dimensions: Take a test piece of 30CIIX30 (1 m), measure its weight, and convert it to basis weight.
〈厚 み〉
カド−チック味社製、圧縮試験機（ＫＥＳ −ＦＢ２）
にて、圧力０．５５ｆ／ｃｍ下での厚みを少なくとも５
点以上測り、その平均値で表わす。<Thickness> Compression tester (KES-FB2) manufactured by Kadochik Aji Co., Ltd.
At a pressure of 0.55 f/cm, the thickness is at least 5
Measure more than one point and express it as the average value.
〈不織シートの沸水収縮率〉
シートを３０；Ｘ３０ａｓ角に切り取りタテ、ヨコ各々
２０ｃｍの位置にマーキングして導水中で３分間処理し
た後、試料の寸法変化を測定し収縮率を求める。なお測
定はｎ−５の平均値で求める。<Boiling water shrinkage rate of non-woven sheet> The sheet is cut into a 30×30 as square, marked at a position of 20 cm both vertically and horizontally, and treated in water for 3 minutes, and then the dimensional change of the sample is measured to determine the shrinkage rate. Note that the measurement is determined by the average value of n-5.
く引張強伸度〉
東洋ボールドウィン社製、万能引張試験機（テンシロン
）により、把握長１０ｃｍ、巾３（至）の試験片を引張
速度２０Ｃ１／分で測定する。Tensile strength and elongation> Using a universal tensile tester (Tensilon) manufactured by Toyo Baldwin, a test piece with a gripping length of 10 cm and a width of 3 (maximum) is measured at a tensile rate of 20 C1/min.
実施例１
第３図の紡糸設備を用い固有粘度０．７８（０−クロロ
フェノール中３５°Ｃ）のポリエチレンテレフタレート
（ＰＥＴ）とジオール成分として２．２ビス（４−ヒド
ロキシエトキシフェニル）プロパンを１０ｍｏｊ！％含
む固有粘度０．７３のポリエチレンテレフタレート共重
合体（Ｃｏ ＰＥＴ）を用い吐出量比（ＰＥＴ／Ｃｏ
ＰＥＴ）１／１のサイドバイサイド型配置として孔当り
１．０ ｇ／ｓ＋ｉｎの吐出量で溶融ポリマーを吐出
し、エアサッカーにて紡速４５００ ＋ｓ／ｓｉｎで拘
束牽引し、開繊分散後金網ドラム上に捕集して順次積層
した後３Ｎ構造の連続フィラメントウェブとした。この
繊維は単糸２．３ｄ、強度２．７ ｇ／ｄ、伸度９３％
であり、沸水収縮率は２５％、清水処理後の繊維の捲縮
率は７．１％、捲縮数６０個／インチ（２，５４ｃ璽）
という潜在捲縮性を有す複合長繊維であった。このウェ
ブを、超音波発振ホーンと直径１閤のビンポイント模様
が２ｆｆｌピツチで彫刻されたエンボスロールを組合せ
た超音波ボンディング装置（日光商事成製）を用いて部
分熱融着を行ない、目付６０ｇ／ｒｄ、厚み０．５５ｍ
の不織シートＡを得た。この不織シー、トＡは、拡大鏡
により不織シート全面にエンボスロールのピンポイント
模様に対応した繊維の融着部分が点在している状態が確
認された（第６図Ａ）。Example 1 Using the spinning equipment shown in Figure 3, 10 moj of polyethylene terephthalate (PET) with an intrinsic viscosity of 0.78 (in 0-chlorophenol at 35°C) and 2.2 bis(4-hydroxyethoxyphenyl)propane as a diol component were prepared. ! % polyethylene terephthalate copolymer (Co PET) with an intrinsic viscosity of 0.73, the discharge rate ratio (PET/Co
PET) 1/1 side-by-side arrangement, the molten polymer was discharged at a discharge rate of 1.0 g/s+in per hole, restrained and pulled using an air sucker at a spinning speed of 4500+s/sin, and after opening and dispersion, it was placed on a wire mesh drum. The fibers were collected and sequentially laminated to form a continuous filament web with a 3N structure. This fiber has a single thread of 2.3 d, strength of 2.7 g/d, and elongation of 93%.
The boiling water shrinkage rate is 25%, the fiber crimp rate after clear water treatment is 7.1%, and the number of crimps is 60/inch (2.54 cm).
It was a composite long fiber with latent crimp properties. This web was partially heat-sealed using an ultrasonic bonding device (manufactured by Nikko Shoji Seibu) that combined an ultrasonic oscillation horn and an embossing roll engraved with a bottle point pattern of 1 loaf in diameter at 2 ffl pitches, and the fabric weight was 60 g. /rd, thickness 0.55m
A nonwoven sheet A was obtained. Using a magnifying glass, it was confirmed with a magnifying glass that the entire surface of the nonwoven sheet was dotted with fused portions of fibers corresponding to the pinpoint pattern of the embossing roll (FIG. 6A).
該シートＡをショートループ熱処理機にて雰囲気温度１
２０°Ｃ１処理時間２０ｓｅｃの条件でリラックス熱処
理を施したところ、潜在捲縮の顕在化に伴いタテ方向に
４３％、ヨコ方向に３０％収縮し、目付１５０ｇ／ボ、
厚み５．３ｍの非常に柔軟で嵩高性、伸長回復性、形態
追従性に富んだ第１表に示す物性を持った長繊維不織シ
ートＢが得られた。該シートＢを拡大鏡で観察すると、
点在する繊維の熱融着部分が、コイル状の極めて微細な
捲縮を有する繊維によって連結されており、隣接する熱
融着部の間において約１０個の捲縮が存在している状態
が確認できた（第６図Ｂ）。The sheet A is heated to an ambient temperature of 1 in a short loop heat treatment machine.
When relaxing heat treatment was performed at 20°C for 20 seconds, the material contracted by 43% in the vertical direction and 30% in the horizontal direction due to the emergence of latent crimp, and the fabric weight was 150 g/bore.
A long-fiber nonwoven sheet B having a thickness of 5.3 m and having the physical properties shown in Table 1 was obtained, being extremely flexible and rich in bulk, stretch recovery, and conformability. When observing the sheet B with a magnifying glass,
The heat-sealed portions of scattered fibers are connected by coiled fibers with extremely fine crimps, and there are approximately 10 crimps between adjacent heat-sealed portions. This was confirmed (Figure 6B).
比較例１
第１図の紡糸設備を用い実施例１と全く同一の紡糸条件
で紡糸して得られた単層構造の目付６０ｇ／ｆ、潜在捲
縮性、長繊維ウェブに、実施例１と同条件で超音波ボン
ディングを施し不織シー）Ｃとした。該シートＣに実施
例１と同様条件のショートループ熱処理機でリラックス
熱処理を施し不織シートＤとしたが収縮率はタテ方向に
２０％、ヨコ方向に１６％と小さく嵩高性に乏しい本発
明の目的には適さないものであった。Comparative Example 1 A single-layer structure with a basis weight of 60 g/f, latent crimpability, and long fiber web obtained by spinning under the same spinning conditions as in Example 1 using the spinning equipment shown in FIG. Ultrasonic bonding was performed under the same conditions to obtain nonwoven sheet) C. The sheet C was subjected to a relaxing heat treatment using a short loop heat treatment machine under the same conditions as in Example 1 to obtain a nonwoven sheet D, but the shrinkage rate was 20% in the vertical direction and 16% in the horizontal direction, which is the result of the present invention having low bulk. It was unfit for purpose.
実施例２
第１図の紡糸設備を用い実施例１と全く同一の紡糸条件
で紡糸して得られた単層構造目付２０ｇ／ボの潜在捲縮
性長繊維ウェブを、超音波発振ホーンと直径１ｍｍのビ
ンポイント模様が５１１Ｉ＋１ピツチで彫刻されたエン
ボスロールを組合せた超音波ボンディング装置を用いて
部分熱融着による仮接合を行ない不織シートＥとし一旦
巻取った。Example 2 A potentially crimpable long-fiber web with a single-layer structure having a basis weight of 20 g/bo was obtained by spinning using the spinning equipment shown in Fig. 1 under the same spinning conditions as in Example 1. Temporary bonding was performed by partial heat fusion using an ultrasonic bonding device combined with an embossing roll on which a 1 mm bottle point pattern was engraved with 511I+1 pitches, and a nonwoven sheet E was formed and wound up once.
さらに該不織シートＥを５層同時に巻戻して積層し超音
波発振ホーンと直径１ａｕｎビンポイント模様が５ｍｍ
ピッチで彫刻されたエンボスロールを組合せた超音波ボ
ンディング装置を用いて部分熱融着を行ない層間を接合
一体化させ目付１００ｇ／ｒＷ、厚さ０．９５閣の不織
シートＦを得た。この不織シートＦに、実施例１と同様
条件のショートループ熱処理機でリラックス熱処理を施
したところ目付２２０ｇ／％厚さ７．８μ−の非常に嵩
高性、り・ンション性に富んだ不織シー）Ｇが得られた
。Furthermore, five layers of the nonwoven sheet E are simultaneously unwound and laminated to form an ultrasonic oscillation horn and a bottle point pattern with a diameter of 1 aun and 5 mm.
Partial heat fusion was performed using an ultrasonic bonding device combined with an embossing roll engraved with pitch to bond and integrate the layers to obtain a nonwoven sheet F with a basis weight of 100 g/rW and a thickness of 0.95 mm. When this nonwoven sheet F was subjected to relaxing heat treatment using a short loop heat treatment machine under the same conditions as in Example 1, it was found that the fabric weight was 220 g/% and the thickness was 7.8 μm. C) G was obtained.
［発明の効果］
本発明の不織シートは、熱収縮処理で風合の硬化がなく
、嵩高発現性が大きくクッション性があり、且つ、表面
耐摩耗性にすぐれたものである。[Effects of the Invention] The nonwoven sheet of the present invention does not harden in texture when subjected to heat shrinkage treatment, has high bulkiness, has cushioning properties, and has excellent surface abrasion resistance.
さらに潜在収縮性を有しそのため形態追従性、伸長回復
性をもち、収縮包装材料、生活資材として高い機能を有
するものである。Furthermore, it has latent shrinkability, and therefore has shape followability and elongation recovery properties, and has high functionality as a shrink packaging material and daily life material.
第１図は、本発明の製法を実施するための不織シート製
造装置の一例を示す斜視図である。
第２図は本発明の製法を実施するための超音ボンディン
グ法を示す模式図である。
第３図は、本発明の積層不織シートを連続的に得るため
製造装置の一例を示す模式図である。
第４図Ａ、 Ｂ、第５図Ａ、Ｂは、単層及び積層構造の
不織シートにリラックス熱処理をした潜在捲縮の顕在化
に伴う嵩高性の変化の様子を示す模式図である。
第５図Ａは本発明の熱処理前の不織シート中の繊維配列
状態を示す写真拡大模写図、第５図Ｂは本発明の不織シ
ートに熱処理を施し、潜在捲縮を顕在化させた不織シー
ト中での繊維の配列状態を示す写真拡大模写図である。FIG. 1 is a perspective view showing an example of a nonwoven sheet manufacturing apparatus for carrying out the manufacturing method of the present invention. FIG. 2 is a schematic diagram showing an ultrasonic bonding method for carrying out the manufacturing method of the present invention. FIG. 3 is a schematic diagram showing an example of a manufacturing apparatus for continuously obtaining the laminated nonwoven sheet of the present invention. FIGS. 4A and 4B and FIGS. 5A and 5B are schematic diagrams showing changes in bulkiness due to manifestation of latent crimp when single-layer and laminated nonwoven sheets are subjected to relaxation heat treatment. FIG. 5A is an enlarged photographic reproduction showing the state of fiber arrangement in the nonwoven sheet before heat treatment of the present invention, and FIG. 5B is a photographic enlarged copy showing the state of fiber arrangement in the nonwoven sheet of the present invention before heat treatment, and FIG. 5B shows the nonwoven sheet of the present invention subjected to heat treatment to reveal latent crimp. FIG. 2 is an enlarged photographic reproduction showing the arrangement of fibers in a nonwoven sheet.
Claims (2)
繊維横断面に於て偏心的に配置した複合繊維から成る長
繊維不織ウェブが複数層積層され部分熱融着によって接
合一体化された長繊維不織シートであって、シート中の
部分熱融着部を連結する繊維は潜在捲縮性を有しており
、該シートの沸水収縮率が少なくとも一方向に２０％以
上である事を特徴とする嵩高発現性に富む熱収縮性不織
シート1. Two types of fiber-forming polymers with different heat shrinkability,
A long-fiber nonwoven sheet in which multiple layers of long-fiber nonwoven webs made of composite fibers arranged eccentrically in the cross section of the fibers are laminated and joined together by partial heat-fusion. A heat-shrinkable nonwoven sheet with high bulkiness, characterized in that the fibers connecting the bonded parts have latent crimpability, and the sheet has a boiling water shrinkage rate of 20% or more in at least one direction.
面に於て偏心的に配置した複合繊維からなる長繊維不織
ウェブを複数層積層し、表面にエンボス模様を有するロ
ールと超音波発振ホーンの間隙で処理し、エンボス凸部
にあたる繊維を融着固定し接合一体化する事を特徴とす
る熱収縮性長繊維不織シートの製法2. Multiple layers of long-fiber nonwoven webs made of composite fibers made of fiber-forming polymers with different heat shrinkability are arranged eccentrically in the cross section of the fibers are laminated, and a roll with an embossed pattern on the surface and an ultrasonic oscillation horn are used. A method for manufacturing a heat-shrinkable long-fiber nonwoven sheet, which is characterized by processing the fibers in the gaps, fusing and fixing the fibers in the embossed convex portions, and joining and integrating them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1120370A JPH02300365A (en) | 1989-05-16 | 1989-05-16 | Heat shrinkable nonwoven sheet rich in developability of bulkiness and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1120370A JPH02300365A (en) | 1989-05-16 | 1989-05-16 | Heat shrinkable nonwoven sheet rich in developability of bulkiness and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02300365A true JPH02300365A (en) | 1990-12-12 |
Family
ID=14784523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1120370A Pending JPH02300365A (en) | 1989-05-16 | 1989-05-16 | Heat shrinkable nonwoven sheet rich in developability of bulkiness and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02300365A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533257A (en) * | 1991-07-19 | 1993-02-09 | Unitika Ltd | Nonwoven fabric |
| JPH05125645A (en) * | 1991-10-28 | 1993-05-21 | Unitika Ltd | Stretchable bulky filament nonwoven fabric and its production |
| JP2000314065A (en) * | 1999-04-28 | 2000-11-14 | Daiwabo Co Ltd | Cleaning nonwoven fabric and its production |
| JP2002187228A (en) * | 2000-10-12 | 2002-07-02 | Kao Corp | Three dimensional sheet material |
| JP2003247155A (en) * | 2002-02-25 | 2003-09-05 | Kao Corp | Three-dimensional sheet material |
| JP2008280665A (en) * | 2007-04-10 | 2008-11-20 | Mitsubishi Rayon Co Ltd | Core-sheath conjugated fiber |
| US7534928B2 (en) | 2001-08-10 | 2009-05-19 | Kao Corporation | Topsheet for absorbent article |
| US7569264B2 (en) | 2001-12-28 | 2009-08-04 | Kao Corporation | Topsheet for absorbent article |
| JP2017225741A (en) * | 2016-06-24 | 2017-12-28 | ユニ・チャーム株式会社 | Disposable wearing article |
-
1989
- 1989-05-16 JP JP1120370A patent/JPH02300365A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533257A (en) * | 1991-07-19 | 1993-02-09 | Unitika Ltd | Nonwoven fabric |
| JPH05125645A (en) * | 1991-10-28 | 1993-05-21 | Unitika Ltd | Stretchable bulky filament nonwoven fabric and its production |
| JP2000314065A (en) * | 1999-04-28 | 2000-11-14 | Daiwabo Co Ltd | Cleaning nonwoven fabric and its production |
| JP2002187228A (en) * | 2000-10-12 | 2002-07-02 | Kao Corp | Three dimensional sheet material |
| US7303808B2 (en) | 2000-10-12 | 2007-12-04 | Kao Corporation | Bulky sheet material having three-dimensional protrusions |
| US7534928B2 (en) | 2001-08-10 | 2009-05-19 | Kao Corporation | Topsheet for absorbent article |
| US7569264B2 (en) | 2001-12-28 | 2009-08-04 | Kao Corporation | Topsheet for absorbent article |
| JP2003247155A (en) * | 2002-02-25 | 2003-09-05 | Kao Corp | Three-dimensional sheet material |
| US7942992B2 (en) | 2002-02-25 | 2011-05-17 | Kao Corporation | Bulky sheet material having three-dimensional protrusions |
| JP2008280665A (en) * | 2007-04-10 | 2008-11-20 | Mitsubishi Rayon Co Ltd | Core-sheath conjugated fiber |
| JP2017225741A (en) * | 2016-06-24 | 2017-12-28 | ユニ・チャーム株式会社 | Disposable wearing article |
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