JPS60194159A - Polyester long fiber nonwoven fabric and its production - Google Patents
Polyester long fiber nonwoven fabric and its productionInfo
- Publication number
- JPS60194159A JPS60194159A JP59048078A JP4807884A JPS60194159A JP S60194159 A JPS60194159 A JP S60194159A JP 59048078 A JP59048078 A JP 59048078A JP 4807884 A JP4807884 A JP 4807884A JP S60194159 A JPS60194159 A JP S60194159A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- web
- temperature
- filament
- thermocompression bonded
- 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
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
く技術分野〉
本発明は実質的にポリエチレンテレフタレート単一成分
からなる長繊維不織布とその製造法に１ｙ１する。よシ
詳しくは、腰が強くて屈曲時の反撥’ｊｌ性が犬で、且
つ削毛羽特性に優れて鞄用芯利等に使用するのに適した
長繊維不織布とその製造法に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a long-fiber nonwoven fabric consisting essentially of a single component of polyethylene terephthalate and a method for producing the same. More specifically, the present invention relates to a long-fiber nonwoven fabric that is strong, has good resilience when bent, and has excellent fluffing properties, and is suitable for use in bag cores, etc., and a method for producing the same.
〈先行技術〉
熱可塑性ポリマーを溶融紡糸し、連続フィラメントの状
態で高速延伸した後移動コンベア上にこれら多数の連続
フィラメントからなるウェブを形成し、ひき続いて加熱
ロールあるいは樹脂により繊維間を結合させ一挙に不織
布を得る方法はスパンボンド方式として広く知られてい
る。中でもポリエチレンテレフタレートに代表されるポ
リエステルスパンポンド不織布は耐熱性、耐候性、寸法
安定性、高ヤング率等の種々の特長を有しているために
産業資材を始めとする多くの分野で使用されている。通
常ポリエステルスパンポンドでは紡糸直後に５０００ｍ
／分前後の高速度で延伸することにより強度並びに耐熱
寸法安定性の良好な単糸が得られ、これを適切な温度と
圧力の下で熱圧着することによりあるいは樹脂との併用
によシ繊維間の接合を図って、布帛としての実用特性を
有した不縁、布を荘るものである。しかし女からこのよ
うな高い紡糸速度で得られた長繊維ウェブを樹Ｊｌｔ’
ｉ処理なしの加声″（ロールのみで熱接合する場合、特
にポリエステルについてはナイロンその他の素材とは異
なシ熱接合条件の適切な領域が狭いので、最適奈件に対
しロールの温度や圧力が若干でも低いと引裂強力は満足
されるものの特に耐毛羽特性が劣るとととなり、一方ロ
ール温度や圧力が高過ぎると熱圧着部の繊維が損傷し、
引張強度や引裂強度が騒しく低下する。さらにたとえ適
切な条件下で熱圧着を行なったとしてもポリエステル長
繊維不織布の場合には高目付になるに従い繊維間の熱接
合が充分でなくなる傾向を有し、その結果耐毛羽特性が
劣るように力る。一方耐毛羽特性の改良を目的に樹脂処
理を行々う場合、その量が少ないと毛羽伏せ効果が充分
でなく、反対に樹脂−計を増加するに従い耐毛羽特性は
改良されるものの引裂強力の低下、層間剥離の発生、さ
らには樹脂処理なしの不織布の特徴の一つである軽さの
低減等これまた実用上さまざまな問題が発生する。<Prior art> A thermoplastic polymer is melt-spun, stretched at high speed in the form of continuous filaments, and then a web consisting of a large number of these continuous filaments is formed on a moving conveyor, and the fibers are subsequently bonded using heated rolls or resin. The method of obtaining nonwoven fabric in one go is widely known as the spunbond method. Among them, polyester spunpond nonwoven fabrics, represented by polyethylene terephthalate, have various features such as heat resistance, weather resistance, dimensional stability, and high Young's modulus, so they are used in many fields including industrial materials. There is. Normally, for polyester spun ponds, the length is 5000m immediately after spinning.
Single fibers with good strength and heat-resistant dimensional stability can be obtained by drawing at a high speed of around 1/2 min, and by thermocompression bonding under appropriate temperature and pressure, or in combination with resin, fibers can be obtained. It is intended to create a fabric that has practical characteristics as a fabric by creating a bond between the two. However, the long fiber web obtained from women at such high spinning speeds is
(If heat bonding is performed only with rolls, the appropriate range of heat bonding conditions for polyester, which is different from nylon and other materials, is narrower.) If the roll temperature or pressure is even slightly lower, the tear strength will be satisfactory, but the fuzz resistance will be poor.On the other hand, if the roll temperature or pressure is too high, the fibers in the thermocompression bonded part will be damaged.
Tensile strength and tear strength decrease noisily. Furthermore, even if thermocompression bonding is carried out under appropriate conditions, in the case of polyester long fiber nonwoven fabrics, as the basis weight increases, the thermal bonding between the fibers tends to become insufficient, resulting in poor fuzz resistance. Strengthen. On the other hand, when resin treatment is carried out for the purpose of improving fuzz resistance, if the amount is small, the fuzz binding effect will not be sufficient.On the other hand, as the amount of resin increases, the fuzz resistance will improve, but the tear strength will decrease. This also causes various practical problems, such as deterioration, delamination, and reduction in lightness, which is one of the characteristics of nonwoven fabrics without resin treatment.
本発明者等は、ポリエステル繊維の熱による収縮特性を
詳細に研究した結果、部分熱圧着金比較的低温で行った
上で、さらに高温で熱処理するという二段階処理方式に
よって耐毛羽特性を始めとした総合的な特性の優れた不
織布を得ることができることを見出し本発明に到達した
。As a result of detailed research on the heat-induced shrinkage characteristics of polyester fibers, the present inventors have determined that the fuzz resistance characteristics can be improved by using a two-step treatment method in which partial thermocompression bonding is performed at a relatively low temperature and then heat treatment is performed at a higher temperature. The present invention was achieved by discovering that it is possible to obtain a nonwoven fabric with excellent overall properties.
〈発明の目的〉
本発明は腰が強くて屈曲時の反撥外付が大で、且つ耐毛
羽特性に優れた長繊維不織布とその製造法を提供するこ
とを目的とする。<Objective of the Invention> The object of the present invention is to provide a long-fiber nonwoven fabric that is strong, has a large external repulsion when bent, and has excellent fuzz resistance, and a method for producing the same.
〈発明の構成〉
本発明の目的はポリエチレンテレフタレート長繊維から
成るウェブに熱圧着による部分結合を与えて形成し、部
分熱圧着部と非熱圧着部とで構成されている不織布にお
いて、その不織布の部分熱圧着部が不織布の表面績の５
％以上を占め、非熱圧着部の垂直切断面中に占めるフィ
ラメントの切断面の面積比率が少くとも２０チであるこ
とを特徴トスるポリエチレンテレフタレート長繊維不織
布によって達成される。<Structure of the Invention> The object of the present invention is to provide a nonwoven fabric formed by partially bonding a web made of polyethylene terephthalate long fibers by thermocompression bonding, and comprising a partial thermocompression bonded portion and a non-thermocompression bonded portion. Partial thermocompression bonding part has a non-woven fabric surface.
% or more, and the area ratio of the cut surface of the filament in the vertical cut surface of the non-thermo-bonded part is at least 20 cm.
本発明による不織布の製造法は、１５０℃における乾熱
収縮率が３０１以上であり、且つ複屈折率が０．０２以
上であるポリエチレンテレフタレート長繊維、メントか
らなるウェブを７０℃以上１００℃以下の温度で５チ以
上の面積比率を与えて部分熱圧テチし、部分熱圧着ウェ
ブを１３０℃以上２３０℃以下の雰囲気中で該温度にお
ける部分熱圧着ウェブの乾熱収縮率よシタテ、ヨコ両方
向ともにそれぞれ５チから１５％小さい範囲の収縮を許
容する条件下で乾熱収縮させることを特徴とする。The method for producing a nonwoven fabric according to the present invention involves heating a web made of polyethylene terephthalate long fibers and mento having a dry heat shrinkage rate of 301 or more at 150°C and a birefringence of 0.02 or more at a temperature of 70°C to 100°C. Partially heat-pressed web is subjected to partial heat-pressing with an area ratio of 5 inches or more at a temperature, and the dry heat shrinkage rate of the partially heat-pressed web at that temperature is determined in both vertical and horizontal directions in an atmosphere of 130°C or higher and 230°C or lower. It is characterized by dry heat shrinking under conditions that allow shrinkage in the range of 5 cm to 15%.
〈構成のよ１１体的説明〉
まず本発明の不織布を得るためにそのウェブを構成する
ｊｐ糸は軟化温度が低くかつ熱収妃率が太きいもの、具
体的には１５０℃における乾熱収縮率が３０−以上であ
り、かつ複屈折率が０．０２以−ヒであることが必要で
ある。ポリエステルスパンポンド法により得られた単糸
の乾熱収縮率が３０チ以上であることは通常の５０００
１１１／分前後の紡糸速度で得られたものに対し比較的
低い紡糸速度で得られたいわゆる半延伸糸の領域のフィ
ラメントであることを意味する。すなわち、通常の高い
紡糸速度で得られたフィラメントに比べいわゆる軟化温
度が低いものであり、加熱に伴ない熱収縮力が生じると
ともにフィラメント同士が密着することができる。なお
乾熱収縮率が３０％以−ヒであって軟化温度の低い単糸
であシかつ複屈折率が０．０２を下回るものはいわゆる
未延伸糸の領域のものとなり、加熱に伴六い脆化を生じ
て極めてもろくなるとともに可撓性が低い。その結果そ
の繊維を用いて作られた不織布は実用性能の劣るものと
なり、本発明の目的とする不織布を召ノるためのウェブ
を構成する単糸としては適さない。<Comprehensive explanation of the structure> First, in order to obtain the nonwoven fabric of the present invention, the JP yarn constituting the web is one that has a low softening temperature and a high heat recovery rate, specifically, dry heat shrinkage at 150°C. It is necessary that the index is 30 or more and the birefringence is 0.02 or more. The dry heat shrinkage rate of the single yarn obtained by the polyester spunpond method is 30 cm or more, which is the normal 5000 cm.
This means that the filaments are in the region of so-called semi-drawn yarns obtained at relatively low spinning speeds compared to those obtained at spinning speeds of around 111/min. That is, the so-called softening temperature is lower than that of filaments obtained at a normal high spinning speed, and a thermal shrinkage force is generated upon heating, and the filaments can be brought into close contact with each other. Note that single yarns with a dry heat shrinkage rate of 30% or more, a low softening temperature, and a birefringence index of less than 0.02 are in the so-called undrawn yarn category, and the It becomes extremely brittle due to embrittlement and has low flexibility. As a result, a nonwoven fabric made using such fibers has poor practical performance, and is not suitable as a single yarn constituting a web for producing a nonwoven fabric, which is the object of the present invention.
樹脂を用ないず々わちノーバインダーの条件下で本り４
明の目的とする耐毛羽特性に優れ屈曲時の反ばつ弾性の
大きな不織布を得る過程でのウェブ挙動を具体的に説明
する。前記本発明の不織布は部分熱圧着部と非熱圧着部
とで構成されている。Book 4 under conditions of no binder without using resin
The behavior of the web in the process of obtaining a nonwoven fabric with excellent fuzz resistance and high repulsion elasticity when bent will be specifically explained. The nonwoven fabric of the present invention is composed of a partial thermocompression bonded portion and a non-thermocompression bonded portion.
すなわち、まず半姑伸糸からなるウェブを加熱条件下で
処理して全体的に熱収縮させるとともにフィラメント同
士の軟化に伴なうフィラメント交絡点における密着現象
を発現させることによって特に非熱圧着部における繊維
充填密度を増加させ、さらに繊維間結合力をも増加させ
ることが必要である。その結果耐毛羽特性が向上される
ことになる。That is, first, a web made of half-drawn yarn is treated under heating conditions to cause the entire body to undergo thermal shrinkage, and at the same time to develop an adhesion phenomenon at the intertwining points of the filaments due to the softening of the filaments. It is necessary to increase the fiber packing density and also increase the interfiber bond strength. As a result, the fuzz resistance is improved.
才たフィラメント間の接合を部分的に強固に生せしめる
ために熱と圧力を局部的にかけたいわゆる部分熱圧着部
を設けることが必要であシ、この部分熱圧着部を全体の
５チ以上の面積率で与える本発明の不織布はこのように
構成されているので優れた耐毛羽特性を有すると共に、
部分熱圧着部で相互に強固に接合されている複数のフィ
ラメントが非熱圧着部において高い繊維充填密度で配置
されることになり、その結果腰の強い屈曲反撥弾性の高
い不織布が得られることになる。したがって部分熱圧着
部の面積率が５ｑ６を下回ると本発明による単糸をもっ
てしても充分な耐毛羽特性が得られなくなる１１か腰の
強い屈曲反ばつ弾性の高い不織布が得られない。なおこ
の部分熱圧着部の面積率〃巧Ｏチを越えると不織布のも
つ嵩高性、通気性等の特徴が著しく低減されるため部分
熱圧着面積率は５０％以下であることが好ましい。In order to partially strengthen the bond between the broken filaments, it is necessary to provide a so-called partial thermocompression bonding section in which heat and pressure are applied locally. Since the nonwoven fabric of the present invention given by the area ratio is configured in this way, it has excellent fuzz resistance, and
A plurality of filaments that are firmly bonded to each other in the partial thermocompression bonded area are arranged at a high fiber packing density in the non-thermocompression bonded area, resulting in a nonwoven fabric that is strong and has high bending resilience. Become. Therefore, if the area ratio of the partial thermocompression bonded portion is less than 5q6, sufficient fuzz resistance cannot be obtained even with the single yarn according to the present invention, and a nonwoven fabric with high stiffness and high bending resilience cannot be obtained. If the area ratio of the partial thermocompression bonded portion exceeds 0, the characteristics of the nonwoven fabric such as bulkiness and air permeability will be significantly reduced, so the area ratio of the partial thermocompression bonding portion is preferably 50% or less.
次に本発明のポリエステル繊維不織布の最も好ましい製
造法について説明する。すなわち１５０℃における乾熱
収縮率が３０チ以上であり、かつ複屈折率が０．０２以
上のフィラメントからなるウェブを少なくとも一方の表
面に凹凸模様を有し、その凸部の面積率が５チ以上好ま
しくは５０％以下である一対の圧着ロールに通し、７０
°Ｃ以」１１００℃以下の温度で部分熱圧着する。次に
１３０℃以上２３０℃以下好ましくは１５０℃以上２２
０℃以下の温度で該温度における部分熱圧着ウェブのタ
テ方向並びにヨコ方向の乾熱収縮率よｐそれぞれ５チか
ら１５係小さい範囲の収縮率になるようコントロールし
た状態で部分熱圧着ウェブを収縮させることにより構成
フィラメントを収縮させ、フィラメント間の又絡箇所を
増加させるとともにそこでのフィラメントの軟化に伴な
う結合力の強化を図る。その結果、本発明の目的とする
耐手羽特性が優れかつ屈曲反ばつ弾性の高い不織布が得
られる。Next, the most preferred method for producing the polyester fiber nonwoven fabric of the present invention will be explained. In other words, a web made of filaments having a dry heat shrinkage rate of 30 inches or more at 150°C and a birefringence of 0.02 or more has an uneven pattern on at least one surface, and the area ratio of the convex portions is 5 inches. or more preferably 50% or less, pass through a pair of pressure rolls, and
Partial thermocompression bonding is carried out at a temperature of 1100°C or less. Next, 130℃ or higher and 230℃ or lower, preferably 150℃ or higher22
Shrink the partially thermocompressed web at a temperature below 0°C in a controlled manner so that the shrinkage rate is within a range of 5 to 15 times smaller than the dry heat shrinkage rates of the partially thermocompressed web in the vertical and horizontal directions at that temperature. By doing so, the constituent filaments are shrunk, the number of intertwining points between the filaments is increased, and the bonding force at these points is strengthened as the filaments soften. As a result, a nonwoven fabric with excellent wing resistance properties and high bending/flipping elasticity, which is the object of the present invention, can be obtained.
本発明のポリエステル繊維不織布の最も好ましい虻造法
においては前述のように熱処理を二段階に分けて実施し
ている。以下その理由について説明ｆる。すなわち一般
にス・マンボンド法のような空気流による開繊によシウ
エプを形成する方法においてはコンベア等のフィラメン
ト補集面上で目付斑のない均−外ウェブを形成すること
は必ずしも容易ではなく、いわゆる海島状の厚薄斑を生
じ易い。このような目付斑の比較的大きなウェブを熱収
縮がを−じる温度条件下にあるロール間で直接熱圧着し
ようとすると熱圧着ロールによってウェブが牛皮ｔ；１
（下におかれるために熱収縮力が目付の高い部分に集中
する結果、高目付部は一層高い目付となシ低目付部は反
対に−Ｊｉ％低い目付となるためにウェブ形成時の目付
斑が拡大するという問題が発生し、この傾向１／ｉ熱収
縮率の高いウェブにおいて、すなわち一般的に軟化温度
が低く、フィラメント同士が密着し易いウェブにおいて
顕著とたる。このようなＪｊｌｊ由により熱収縮の生じ
ない温度での部分熱圧着がまず必要となる。ひき続いて
高温度の下で該温度におけるシートの乾熱収縮率よりタ
テ・ヨコ両方向ともそれぞれ５チから１５％小さい範囲
の収縮率になるようコントロールした状態で該シートを
収縮させるが、この際に乾熱収縮率、！：ｐ５係小さい
値以上に収縮させると非熱圧着部のフィラメント交絡点
の増加とここでのフィラメント間密着により耐毛羽特性
の向上したものとなる反面、熱収縮の際に海島部におい
て応力歪みを生じ、このために得られた不織布の表面に
波状の凹凸が発生し実用上間；“１１となる。一方、収
縮を該温度での乾熱収縮率よシ１５ｑ６下回る値より小
さい値に抑えた場合には鋤鶴述べた理由による厚薄斑、
いわゆる目付斑の拡大化を伴なうという問題が生じるほ
かフィラメント交絡点の増加と密着化が充分でなく力る
ために本発明の目的とする耐毛羽特性に優れ、かつ屈曲
反ばつ弾性の大きな不織布が得られなくなる。In the most preferred method for making the polyester fiber nonwoven fabric of the present invention, the heat treatment is carried out in two stages as described above. The reason for this will be explained below. In other words, in general, in a method such as the Sumanbond method in which a web is formed by opening the filament with an air flow, it is not necessarily easy to form a uniform web without unevenness on the filament collection surface of a conveyor or the like. So-called sea-island-like thick and thin spots are likely to occur. If you attempt to directly heat-press a web with such relatively large density spots between rolls under temperature conditions that prevent heat shrinkage, the web will be bonded to cowhide skin by the heat-press rolls.
(As a result of the heat shrinkage force being concentrated on the area with high basis weight due to being placed at the bottom, the area with high basis weight has an even higher basis weight, and the area with low basis weight has a -Ji% lower basis weight, so the basis weight at the time of web formation) The problem of enlarged spots occurs, and this tendency is noticeable in webs with a high 1/i heat shrinkage rate, that is, in general, in webs where the softening temperature is low and the filaments tend to stick together. First, partial thermocompression bonding is required at a temperature that does not cause heat shrinkage.Subsequently, shrinkage is performed at a high temperature in a range of 5% to 15% lower in both the vertical and horizontal directions than the dry heat shrinkage rate of the sheet at that temperature. The sheet is shrunk in a controlled state so that the dry heat shrinkage ratio, !: p5, is smaller than the value, and the number of intertwined points of the filaments in the non-thermo-bonded area increases and the number of interfilaments increases. Although the adhesion improves the fuzz resistance, stress distortion occurs in the sea-island areas during heat shrinkage, which causes wavy irregularities on the surface of the obtained nonwoven fabric, resulting in a practical problem of 11. On the other hand, if the shrinkage is suppressed to a value smaller than the dry heat shrinkage rate at that temperature by 15q6, thick and thin spots will occur due to the reasons mentioned above.
In addition to the problem of enlargement of so-called eye spots, there is an increase in the number of intertwined points of filaments and insufficient adhesion. It becomes impossible to obtain nonwoven fabric.
以上述べたように、本発明による製造法は、一般のポリ
エステルス・やンボンド不織布に供せられる５（１００
ｍ７分前後の高い紡糸速度で得られた軟化温度が高く、
寸法安定性の良好なフィラメント群からなるウェブを１
１４いる場合と異なシ、軟化４２度が低く熱収縮率が太
きいという一般的には好゛ましくない半延伸糸の領域に
属するウェブの特性を利用するので、加熱下での収縮現
象に伴なう非熱圧着部におけるフィラメント交絡点の増
加とこの部分の単位体積中に占めるフィラメント密度の
増加並びに軟化に伴なう交絡箇所でのフィラメント同士
の密着力の強化を図ることができるのである。この結！
’Ｊ：ＭＬ ’ｔ”＋會′りい目付になるほど熱圧着の
みでは毛羽止めが削離となる単一成分からなるポリニス
デル長繊維不織布において極めて良好な耐毛羽特性を有
するものが得られることになる。As described above, the manufacturing method according to the present invention can be applied to a general polyester yarn bonded nonwoven fabric.
The softening temperature obtained at a high spinning speed of around 7 minutes is high;
A web consisting of a group of filaments with good dimensional stability is
14, the properties of the web, which belong to the generally unfavorable semi-drawn yarn region of having a low softening rate of 42 degrees and a high heat shrinkage rate, are utilized, so it is less likely to shrink under heating. This increases the number of filament entanglement points in the non-thermo-compression bonded area, increases the filament density in the unit volume of this area, and strengthens the adhesion between filaments at the intertwined points due to softening. . This knot!
'J: ML 't' + 會' The higher the weight, the more excellent anti-fluffing properties can be obtained in a single-component polynisdel long fiber nonwoven fabric, where anti-fluffing will be removed by heat-press bonding alone. Become.
次に断面顕微鏡写真ふ・よび断面構造を示す模式図を用
いて従来の不織布と本発明による不織布との違いを説明
する。第１図は従来から知られている紡糸速度５０００
ｍ／分程度で得られたポリエチレンテレフタレート単一
成分からなる熱圧着によ多部分結合された不織布の断面
における繊維の形状と糾：Ｒの集枦状態を示す顕微鏡写
真であり、第２図は本発明による不織布の断面の第１図
と同様の顕微鏡写真である。第１図において右傾および
第２図において２個所に表れている肉厚の薄い部分は部
分ＦＭＳ圧着部である。一方第１図における中央から左
側の部分および第２図の２ケ所の部分熱圧着部の間の部
分は非熱圧着部である。第３図および第４図はそれぞれ
き１１図および第２図の非図から判るように従来不織布
は非熱圧着部における単位体積中に占めるフィラメント
の割合が比較的少なく空隙部が多いのに対し、本発明に
よる不織布ではフィラメントが密に存在するとともに相
互に密着している様子が観、察される。本発明者らが詳
細に検討した結果、本発明の目的とする耐毛羽特性に優
れかつ腰の強い、す女わち屈曲時の反撥弾性の高いポリ
エステル不織布は従来不織布とは異なり不織布の非圧着
部におけるフィラメント充填密度すなわち非熱圧着部を
垂直に切断した場合に該垂直切断面中に占めるフィラメ
ント切断面の面積比率が少なくとも２０ｑ６であること
を満たすものにほかならないことを見い出した。Next, the difference between the conventional nonwoven fabric and the nonwoven fabric according to the present invention will be explained using a cross-sectional micrograph and a schematic diagram showing the cross-sectional structure. Figure 1 shows the conventionally known spinning speed of 5000.
Fig. 2 is a micrograph showing the shape of fibers and the aggregated state of R in the cross section of a nonwoven fabric made of polyethylene terephthalate, which was obtained at a speed of about 100 m/min, and which was bonded in many parts by thermocompression bonding. 2 is a micrograph similar to FIG. 1 of a cross section of a nonwoven fabric according to the invention; FIG. The thin walled portions that are tilted to the right in FIG. 1 and appear at two locations in FIG. 2 are partial FMS crimping portions. On the other hand, the portion to the left of the center in FIG. 1 and the portion between the two partial thermocompression bonding portions in FIG. 2 are non-thermocompression bonding portions. Figures 3 and 4 are shown in Figures 11 and 2, respectively.As can be seen from Figures 11 and 2, conventional non-woven fabrics have a relatively small proportion of filaments in the unit volume in non-thermo-bonded areas, whereas there are many voids. In the nonwoven fabric according to the present invention, it can be seen that the filaments are densely present and are in close contact with each other. As a result of detailed studies by the present inventors, we found that the polyester nonwoven fabric, which is the object of the present invention, has excellent fuzz resistance, is strong, and has high rebound resilience when bent, unlike conventional nonwoven fabrics. It has been found that the filament packing density in the section, that is, the area ratio of the filament cut surface in the vertical cut section when the non-thermocompression bonded section is cut vertically, is at least 20q6.
例えば融点の異なる２成分系の繊維からなる不織布にお
いては低融点成分をバインダーの役割として使うことに
よシ耐毛羽特性の改良されたものがイ↓ｔられることは
公知であるがチリエステルの単一成分からなシ、１１￥
に１００Ｐ／靜以上の高目付において耐毛羽特性に優れ
た腰の強い不織布は本へ〇旧／Ｆ ？ ／”ｌイ小）１
佃り勘７シハイ火７ ンハ障鼎熱圧着部の切断面中に占
めるフィラメント切断面の面積比率が２０％を下回るも
のはフィラメント充填密度が低く、交絡箇所も少ないた
めに屈曲時の反ばつ弾性が低くしかも耐毛羽特性面でも
劣るようになる。For example, it is known that nonwoven fabrics made of two-component fibers with different melting points can have improved fuzz resistance by using a low-melting point component as a binder; From one ingredient, 11 yen
For a strong non-woven fabric with excellent fuzz resistance at a high basis weight of 100P/silver or higher, please refer to this book〇Old/F ? ／”l い小）１
If the area ratio of the filament cut surface in the cut surface of the thermocompression bonded part is less than 20%, the filament packing density is low and there are few intertwined points, so the anti-failure elasticity during bending is low. In addition, it becomes inferior in terms of fuzz resistance.
本発明によυ得られた不織布はカバンの芯材等の曲げ剛
性率が高く、優れた耐毛羽特性の要求される分野におい
て有用に供される。The nonwoven fabric obtained according to the present invention has a high flexural rigidity for core materials of bags, etc., and is useful in fields where excellent fuzz resistance is required.
〈発明の効果〉
本発明による不織布は前述のように構成されているので
、腰が強くて屈曲時の反撥弾性が大で、且つ耐毛羽特性
に優れている。その結果鞄用芯材等の従来この種不織布
が用いることのできない分野においても使用することが
できる。<Effects of the Invention> Since the nonwoven fabric according to the present invention is configured as described above, it is strong, has high rebound resilience when bent, and has excellent fuzz resistance. As a result, it can be used even in fields where this type of nonwoven fabric could not be used conventionally, such as core materials for bags.
〈実施例〉 以下本発明を実施例をあげて具体的に説明する。<Example> The present invention will be specifically described below with reference to Examples.
尚実施例に記載した特性の定義及び測定方法を以下に示
す。The definitions and measurement methods of the characteristics described in the Examples are shown below.
Ｏ耐毛羽特性
学搗型摩擦試験機を用いて摩擦子に共布を用い、た・い
′ｌ’Ｃ２５Ｑ Ｐで１００１り摩擦して判定した。５
級は毛羽立ちが見られず、４級はほんのわずか毛羽立ち
がある。３級は点在した毛羽立ちが見られる。Fuzz Resistance Characteristics: Judgments were made by using a hammer-type friction tester, using the same fabric as the friction element, and rubbing 1001 times with Ta'l'C25QP. 5
Grade 4 has no fluff, and Grade 4 has only slight fluff. Grade 3 has scattered fluff.
２級は毛羽立ちが目立つ。１級は全面がはげしく毛羽立
っている。Grade 2 has noticeable fluff. Grade 1 is extremely fluffy all over.
◎ 単糸乾熱収縮率
収縮率サンプリング板上で２５ｏｎの長さに単糸を切断
し、マーク間が正しく２０ｃｍになるようにマークペン
をつける。これを所定の温度に設定した熱風循環式乾燥
量中で５分間処理し、−昼夜恒温室内に放置後次式によ
り収縮率を算出した。◎ Single yarn dry heat shrinkage rate Shrinkage rate Cut the single yarn to a length of 25 ounces on the sampling plate and attach a mark pen so that the distance between marks is 20 cm. This was treated for 5 minutes in a hot air circulation type drying volume set at a predetermined temperature, and after being left in a constant temperature room day and night, the shrinkage rate was calculated using the following formula.
ｔｏ：マーク長
ｔ：測定長
なお測定回数は１０回であシ、その平均値をめた０
◎ 基布乾熱収縮率
タテ２５α×ヨコ２５ｃｍのサンプルにタテ・ヨコ各々
２０ｚのところにマークペンをつけた後同様に所定の温
度に設定した熱風循環式乾燥量中で５分間処理し、−昼
夜恒温室内に放ｆｉ’（した後上式によシタテ・ヨコ両
方向の収縮率を算出しプこ。測定回数は同じく１０回と
し、その平均値をめた。to: Mark length t: Measurement length The number of measurements was 10 times, and the average value was calculated. After attaching, process for 5 minutes in a hot air circulation dryer set to a specified temperature, and then leave it in a temperature controlled room day and night. The number of measurements was 10 times, and the average value was calculated.
◎ 複屈折率
白色光下で偏光顕微鏡とペレック式コンペンセーターを
用いて測定した。◎ Birefringence Measured using a polarizing microscope and Perec compensator under white light.
◎ 破断強伸度
３ｃｒｎ×２０（−ｒｎの試料をテンシロン引張試験機
にて把み間隔１０ｃｒｎ、引張速度２０ｔＭ／分にて測
定し、破断時の強力及び伸度をめた。なお測定回数は５
回であり、その平均値をめた。◎ Strength and elongation at break A sample of 3 crn x 20 (-rn) was measured using a Tensilon tensile tester at a gripping interval of 10 crn and a tensile speed of 20 tM/min to determine the strength and elongation at break.The number of measurements was 5
times, and the average value was calculated.
◎ 屈曲度ばつ弾性
ヨコ方向５ｏｎタテ方向２０ｃｒｎの試料を切り取シ、
第５図に示した試料固定台１の端部Ａに試料２のタテ方
向の中央部が乗るようセントして一方を台上に固定する
。次に固定部と反対側の試料端部から５圏入った場所に
重量５２のフック付きＮシ３を掛は静止した位置におけ
る試料の突き出し距離ｔをめる。ｔが犬であるほど屈曲
度ばつ弾性は犬である。◎ Cut out a sample with varying degrees of bending and elasticity of 5 on in the horizontal direction and 20 crn in the vertical direction.
The center of the sample 2 in the vertical direction is placed on the end A of the sample fixing table 1 shown in FIG. 5, and one end is fixed on the table. Next, hang the hook-equipped N-shape 3 with a weight of 52 at a location 5 circles from the end of the sample on the opposite side to the fixing part, and measure the protruding distance t of the sample in the stationary position. The more t is a dog, the more dog the bending elasticity is.
◎ 非熱圧着部のフィラメント充填密度２ケ所の部分熱
圧着部にはさまれた非熱圧着部をセクションカッターに
て切断し、断面を５００倍に拡大した顕微鏡写真を撮影
する。この拡大写真において非熱圧着部の中央音附近を
中心とした半径２５ｍｍの円を描くとともにこれを切夛
取ｐ１その重量ＷＩを測定する。次にこの切〕取った円
内に存在するフィラメントの切断部をカッターナイフで
切り出し、その縮重＠Ｗ２に測定する。非熱圧着部の切
断面中に占めるフィラメント切断面の固着比率を以下の
式で定義し、これをフィラメント充填密度とする。なお
測定は異なった場所５ケ所について行ない、これらの平
均からめる。◎ Filament packing density of non-thermo-bonded part The non-thermo-bonded part sandwiched between the two partial thermo-compression parts is cut with a section cutter, and a micrograph of the cross section is taken with a magnification of 500 times. In this enlarged photograph, a circle with a radius of 25 mm centered near the center of the non-thermo-compression bonded part is drawn, and the circle is cut out and its weight WI is measured. Next, a cut portion of the filament existing within the cut circle is cut out using a cutter knife, and its degeneracy @W2 is measured. The adhesion ratio of the filament cut surface to the cut surface of the non-thermocompression bonded part is defined by the following formula, and this is defined as the filament packing density. The measurements were taken at 5 different locations and the averages were taken.
本発明の製婬；法の二段階熱処理によって不織布を作シ
本発明の条件を満たす場合と満たさない姑“１合とを比
較して示す。A comparison will be made between a case in which a nonwoven fabric is produced by the two-step heat treatment according to the method of the present invention and a case in which the conditions of the present invention are met and a case in which the conditions of the present invention are not met.
４００個の紡糸孔を有する矩型紡出口よシ吐出′叶４０
０Ｆ／分で紡出速度をり・えて紡糸したポリエチレンテ
レフタレートフィラメントを該紡出口の下方１０００ｍ
ｍにあるエアーサッカーにて牽引した後、移動するネッ
トコンベアにて捕集してｌ１ｆｉ々の目付のウェブを製
造した。このウェブを上部に凹凸模様を有し、下部がフ
ラットな一次ロールで圧力５０に９／ｃｍ、上］・ロー
ル温Ｉｆｆ ８０ ’Ｃの下で部分熱圧着な施し、部分
熱圧着面積率の異るウェブを得た。次いでこのウェブを
１８０°Ｃで３分間タテ、ヨコ方向それぞれ所定の収縮
率になるように加熱雰囲気中でコントロールして２５０
ｖ／靜の不織布を得た。得られた不織布の製造条件と非
熱圧着部のフィラメント充填密度、耐毛羽特性、屈曲度
ばつ弾性の関係を第１表に示す。Rectangular spinning spout with 400 spinning holes and discharge blade 40
Polyethylene terephthalate filaments spun by changing the spinning speed at 0 F/min were spun 1000 m below the spinning opening.
After being pulled by an air sucker located at m, the web was collected by a moving net conveyor to produce a web with a basis weight of l1fi. This web is subjected to partial thermocompression bonding using a primary roll with an uneven pattern on the top and a flat bottom at a pressure of 50 to 9/cm at a roll temperature of 80'C, with differences in the partial thermocompression area ratio. I got a web that works. Next, this web was heated at 180°C for 3 minutes in a heated atmosphere to achieve a predetermined shrinkage rate in both the vertical and horizontal directions.
A nonwoven fabric of v/silence was obtained. Table 1 shows the relationship between the manufacturing conditions of the obtained nonwoven fabric, the filament packing density of the non-thermocompression bonded part, the anti-fuzz property, and the bending elasticity.
なお第１表中の単象複屈折率（△ｎ）は部分熱圧着を示
す前の繊維の複屈折率である。Note that the single element birefringence (Δn) in Table 1 is the birefringence of the fiber before partial thermocompression bonding.
以下余白
第１表に示すように実施例１〜４の本発明不織布は耐毛
羽特性が優れているとともに屈曲反撥弾性の高いものが
得られた。一方比較例５は熱収縮コントロール率が大で
あり、収縮応力により不織布表面が波打っておυ、賄釧
６痣熱収縮コントロール率が小さく、得られた不織布の
目付斑が著しく拡大している。さらにまた比較例７は部
分熱圧着面積率が小さく、比較例８は１５０℃における
乾熱収縮率が小さいためにいずれも特に優れた耐毛羽特
性並びに屈曲反撥弾性は示さない。また比較例９は熱収
縮に伴ない極めて脆化した実用性に乏しいものとなった
。As shown in Table 1 below, the nonwoven fabrics of Examples 1 to 4 of the present invention had excellent fuzz resistance and high flexural rebound. On the other hand, in Comparative Example 5, the heat shrinkage control rate was large, and the surface of the nonwoven fabric was wavy due to shrinkage stress. . Furthermore, Comparative Example 7 has a small partial thermocompression bonding area ratio, and Comparative Example 8 has a small dry heat shrinkage rate at 150° C., so neither exhibits particularly excellent fuzz resistance and flexural rebound. Furthermore, Comparative Example 9 became extremely brittle due to thermal shrinkage, and was therefore impractical.
比較例１０
前記実施例２の方法において得られた紡糸速度３０００
ｒｎ／分、複屈折率０．０４３の単糸からなるウェブを
同じく上部に凹凸模様を有し、下部がフラットな一対の
ロールにて圧力５０ｋｇ１／釧、上下ロール温度１５０
℃の下で一段階で圧着面積率が２５チに々るよう部分熱
圧着を施した。このとき得られた不織布は著しく目付斑
の拡大したものであった。Comparative Example 10 Spinning speed 3000 obtained in the method of Example 2
rn/min, a web consisting of a single yarn with a birefringence index of 0.043 was rolled using a pair of rolls with a concavo-convex pattern on the upper part and a flat lower part at a pressure of 50 kg1/min, and a temperature of the upper and lower rolls at 150.
Partial thermocompression bonding was performed at a temperature of 0.degree. C. in one step so that the bonding area ratio reached 25 cm. The nonwoven fabric obtained at this time had significantly enlarged areas.
比較例１１
４００個の紡糸孔を有する矩型紡出口よシ吐出（ｉｔ
４００ ｆ ７分で紡糸したポリエチレンテレフタレー
トフィラメントを該紡出口の下方５００ＩＩ＋＋＋＋に
ある二アーザッカーにてｓｏｏｏｍ／分の紡糸速度にて
牽引した後移動するネットコンベアにて補ｔ′
集して２５０ ｆ ／ ｎ？のウェブを製造した。この
ウェブを上部に凹凸模様を有し下部がフラットな一対の
ロールにて一段階で圧着面積率が１０チになるよう圧力
５ （ｌ ｋｇ ／σ、上下ロール温度２３０°Ｃで部
分熱圧着を施した。得られた不織布の耐毛羽特性並びに
タテ方向破断強伸度の結果第２表に示す。Comparative Example 11 Discharge from a rectangular spinning spout having 400 spinning holes (it
Polyethylene terephthalate filaments spun at 400 f/7 minutes are pulled at a spinning speed of sooom/min by a Niersacker located below the spinning outlet at 500 II++++, and then collected by a moving net conveyor at 250 f/n. ? web was produced. This web was partially thermocompressed using a pair of rolls with an uneven pattern on the top and a flat bottom at a pressure of 5 (l kg/σ, upper and lower roll temperatures of 230°C) so that the crimping area ratio was 10 inches in one step. Table 2 shows the results of the fuzz resistance and longitudinal breaking strength and elongation of the obtained nonwoven fabric.
第２表
第２表に示すように比較例１１の不織布（従来から用い
られている不織布）は耐毛羽特性および屈曲反撥弾性が
小発明による不織布に比較して劣る。Table 2 As shown in Table 2, the nonwoven fabric of Comparative Example 11 (a conventionally used nonwoven fabric) is inferior to the nonwoven fabric according to the small invention in fluff resistance and bending resilience.
第１図は従来から知られている紡糸速度５０００ｍ／分
程ｊ川でイ丑られたボ目ノエチ１／ンデレフタレート単
一成分からなる熱圧着によυ部分結合された不織布の断
面における繊維の形状と繊維の集積状態に：示す倍率１
００倍の題微鏡写真であり、第２図は本発明による不織
布の断面の第１図と同様の倍率３０倍の顕微境写山であ
る。第３図お・よび第４図はそ：１１．ぞ第１− ”’
５１図２）−上び２１５２図の非熱圧着部におりるｆ我
維の１ヒ４ノｉζおよび繊維の集積状態を示す模式図で
ある。ヅパ５図は屈曲反撥弾性の測定法金示した略示正
面図である１−１
１・・・試料［ｉ’、ｌ定台、２・・・試（」、：３・
・・フック付き１）（υ。
第１図
第２１ンｌ
第３図
シ、４１図
第５回
ヒ！−門
鳴Figure 1 shows the cross-section of the fibers in the cross section of a nonwoven fabric partially bonded by thermocompression bonding consisting of a single component of polyester 1/nderephthalate, which was spun at a spinning speed of 5000 m/min at a conventionally known rate of 5,000 m/min. Shape and fiber accumulation state: Shown at magnification 1
FIG. 2 is a microscopic photograph at a magnification of 30 times, similar to FIG. 1, of a cross section of a nonwoven fabric according to the present invention. Figures 3 and 4: 11. Part 1 - ”'
51 FIG. 2) - A schematic diagram showing the state of accumulation of fibers and fibers in the non-thermocompression bonded part of FIGS. 21 and 21. Figure 5 is a schematic front view showing the measurement method of flexural rebound.
...with hook 1) (υ. Figure 1, Figure 21, Figure 3, Figure 41, 5th Hi! - Kadonari
Claims (1)
に熱圧着による部分結合を与えて形成し、部分熱圧着部
と非熱圧着部とで構成されている不織布において、 該不織布の部分熱圧着部が不織布の表面積の５チ以上を
占め、非熱圧着部の垂直切断面中に占めるフィラメント
の切断面の面積比率が少くとも２０係であることを特徴
とするＩリエチレンテレフタレ〜ト長繊維不織布。 ２１５０℃における乾熱収縮率が３０係以上であり、且
つ複屈折率が０．０２以上であるポリエチレンテレフタ
レートフィラメントからなるウェブを７０℃以上１０
（１’Ｃ以下の温度で５悌以上の面積比率を与えて部分
熱圧着し、部分熱圧着ウェブを１３０℃以上２３０℃以
下の雰囲気中で該温度における部分熱圧着ウェブの乾熱
収縮率よりタテ、ヨコ両方向ともにそれぞれ５チから１
５％小さい範囲の収縮を許容する条件下で乾熱収縮させ
ることを特徴とするポリエチレンテレフタレート長繊維
不織布の製造法。[Scope of Claims] 1. A nonwoven fabric formed by partially bonding a web made of polyethylene terephthalate long fibers by thermocompression bonding, and comprising a partial thermocompression bonded portion and a non-thermocompression bonded portion, comprising: I-lyethylene terephthalate filament, characterized in that the filament portion occupies 5 cm or more of the surface area of the nonwoven fabric, and the area ratio of the cut surface of the filament to the vertical cut surface of the non-thermocompression bonded portion is at least 20 times. Non-woven fabric. A web made of polyethylene terephthalate filaments having a dry heat shrinkage coefficient of 30 or more at 2150°C and a birefringence of 0.02 or more is heated at 70°C or more by 10
(Partial thermocompression bonding is performed at a temperature of 1'C or less with an area ratio of 5 degrees or more, and the partially thermocompression bonded web is heated in an atmosphere of 130℃ or more and 230℃ or less, based on the dry heat shrinkage rate of the partially thermocompression bonded web at that temperature. 5 inches to 1 inch each in both vertical and horizontal directions
A method for producing a polyethylene terephthalate long fiber nonwoven fabric, which comprises performing dry heat shrinkage under conditions that allow shrinkage within a 5% smaller range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048078A JPS60194159A (en) | 1984-03-15 | 1984-03-15 | Polyester long fiber nonwoven fabric and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048078A JPS60194159A (en) | 1984-03-15 | 1984-03-15 | Polyester long fiber nonwoven fabric and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60194159A true JPS60194159A (en) | 1985-10-02 |
| JPH0122375B2 JPH0122375B2 (en) | 1989-04-26 |
Family
ID=12793299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59048078A Granted JPS60194159A (en) | 1984-03-15 | 1984-03-15 | Polyester long fiber nonwoven fabric and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60194159A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63120154A (en) * | 1986-05-28 | 1988-05-24 | 旭化成株式会社 | Moldable nonwoven sheet |
| JPH01201567A (en) * | 1988-01-30 | 1989-08-14 | Asahi Chem Ind Co Ltd | Production of bulky spun-bond nonwoven fabric |
| JPH01271504A (en) * | 1988-04-22 | 1989-10-30 | Tokyo Keiki Co Ltd | Pavement thickness measuring device |
| WO2023085276A1 (en) * | 2021-11-09 | 2023-05-19 | 東洋紡エムシー株式会社 | Filament nonwoven fabric and bag-like article using same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50987A (en) * | 1973-05-08 | 1975-01-08 | ||
| JPS5237876A (en) * | 1975-09-13 | 1977-03-24 | Toyo Boseki | Manufacture of unwoven fabric interlinings |
| JPS556527A (en) * | 1978-06-28 | 1980-01-18 | Teijin Ltd | Production of net like nonwoven fabric |
| JPS5621936U (en) * | 1979-07-30 | 1981-02-26 | ||
| JPS5754583A (en) * | 1980-09-16 | 1982-04-01 | Kikkoman Corp | Vinegar brewing and its device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5359165A (en) * | 1976-11-09 | 1978-05-27 | Takano Corp | Spiral spring |
-
1984
- 1984-03-15 JP JP59048078A patent/JPS60194159A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50987A (en) * | 1973-05-08 | 1975-01-08 | ||
| JPS5237876A (en) * | 1975-09-13 | 1977-03-24 | Toyo Boseki | Manufacture of unwoven fabric interlinings |
| JPS556527A (en) * | 1978-06-28 | 1980-01-18 | Teijin Ltd | Production of net like nonwoven fabric |
| JPS5621936U (en) * | 1979-07-30 | 1981-02-26 | ||
| JPS5754583A (en) * | 1980-09-16 | 1982-04-01 | Kikkoman Corp | Vinegar brewing and its device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63120154A (en) * | 1986-05-28 | 1988-05-24 | 旭化成株式会社 | Moldable nonwoven sheet |
| JPH01201567A (en) * | 1988-01-30 | 1989-08-14 | Asahi Chem Ind Co Ltd | Production of bulky spun-bond nonwoven fabric |
| JPH0429777B2 (en) * | 1988-01-30 | 1992-05-19 | ||
| JPH01271504A (en) * | 1988-04-22 | 1989-10-30 | Tokyo Keiki Co Ltd | Pavement thickness measuring device |
| WO2023085276A1 (en) * | 2021-11-09 | 2023-05-19 | 東洋紡エムシー株式会社 | Filament nonwoven fabric and bag-like article using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0122375B2 (en) | 1989-04-26 |
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