JP2587461B2 - Nonwoven fabric manufacturing method - Google Patents
Nonwoven fabric manufacturing methodInfo
- Publication number
- JP2587461B2 JP2587461B2 JP63157440A JP15744088A JP2587461B2 JP 2587461 B2 JP2587461 B2 JP 2587461B2 JP 63157440 A JP63157440 A JP 63157440A JP 15744088 A JP15744088 A JP 15744088A JP 2587461 B2 JP2587461 B2 JP 2587461B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- stretched
- stretching
- comparative example
- web
- 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.)
- Expired - Lifetime
Links
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- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は横方向の伸びを保持した高強度なスパンボン
ド不織布の製造方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a high-strength spunbonded nonwoven fabric which maintains a lateral elongation.
従来技術 不織布は通気性、通水性、耐蝕性等を有することから
農業用、土木用、建築用その他様々な分野で使用されて
いるが、用途によっては、高強度の不織布が要求され
る。例えば盛土の補強等地盤強化のための補強材として
使用される場合がそうで、こうした分野では歪が10％前
後に達すると地くずれが発生する。2. Description of the Related Art Nonwoven fabrics are used in agriculture, civil engineering, construction, and various other fields because of their breathability, water permeability, corrosion resistance, and the like. However, high strength nonwoven fabrics are required depending on the application. For example, it is used as a reinforcing material for ground reinforcement such as embankment reinforcement. In such a field, when the strain reaches about 10%, landslide occurs.
高強度なスパンボンド不織布を製造するためには、不
織布を構成するフィラメントを延伸してフィラメント強
度を強めればよく、こうした観点からスパンボンド不織
布の製造方法に延伸工程を付与し、フィラメントをロー
ル延伸したものが知られる（特公昭49−43506号）。In order to manufacture a high-strength spunbonded nonwoven fabric, the filaments constituting the nonwoven fabric may be drawn to increase the filament strength. From such a viewpoint, a drawing process is provided to the spunbonded nonwoven fabric manufacturing method, and the filament is roll-drawn. Is known (Japanese Patent Publication No. 49-43506).
発明が解決しようとする問題点 フィラメントを延伸する場合には、延伸による糸切
れ、冷却不足によるフィラメント相互の付着、べた付い
たフィラメントが延伸ロールに付着することによる糸切
れ等が生じ、均一な延伸ができにくい。このため不織布
の外観が悪化したり、強度が低下し品質上の問題が生じ
易い。Problems to be Solved by the Invention In the case of drawing a filament, yarn breakage due to drawing, adhesion of filaments due to insufficient cooling, thread breakage due to sticky filaments adhering to a drawing roll, etc., occur, resulting in uniform drawing. It is difficult to do. For this reason, the appearance of the nonwoven fabric is deteriorated, the strength is reduced, and quality problems are likely to occur.
本発明者らは、上記の問題を解消して高強度なスパン
ボンド不織布を得るためにウェブを延伸することを考え
たが、ウェブを延伸するのに横方向に延伸したのでは、
スパンボンド不織布の場合、フィラメントが縦並びにな
っているためウェブ外観の厚薄斑が大きくなってウェブ
が裂けることがあり、また物性のばら付きも大きくなる
等の問題を生じる。The present inventors have considered stretching the web in order to solve the above problems and obtain a high-strength spunbonded nonwoven fabric, but since the web was stretched in the transverse direction,
In the case of a spunbonded nonwoven fabric, since the filaments are arranged vertically, thick and thin spots on the appearance of the web become large, the web may be torn, and problems such as large variations in physical properties arise.
本発明は上記の問題を解消し、横方向の伸びを保持し
た高強度なスパンボンド不織布を得ることを目的とす
る。An object of the present invention is to solve the above-mentioned problems and to obtain a high-strength spunbonded nonwoven fabric that maintains lateral elongation.
問題点の解決手段 本発明は、縦横の引張強度比が0.8〜５であるポリプ
ロピレン製スパンボンド不織布を延伸装置により延伸倍
率２〜４倍で縦方向に延伸して縦横の引張強度比を延伸
前の強度比に対して２〜15倍にすることを特徴とするも
のである。Means for Solving the Problems The present invention is to stretch a polypropylene spunbonded nonwoven fabric having a vertical to horizontal tensile strength ratio of 0.8 to 5 in a vertical direction at a draw ratio of 2 to 4 times by a stretching device and to increase the vertical and horizontal tensile strength ratio before stretching. The intensity ratio is 2 to 15 times.
本発明で使用されるポリプロピレン製スパンボンド不
織布は、繊度が１〜20デニール、好ましくは３〜15デニ
ール、目付が15〜600g/m2で構成されており、不織布の
ボンディングは、例えばヒートエンボス、ニードルパン
チ、ウォータージェットパンチ、超音波ウェルダー等に
よって行われる。Polypropylene spunbonded nonwoven fabric used in the present invention, fineness of 1-20 deniers, preferably 3 to 15 denier, basis weight is constituted by 15~600g / m 2, the nonwoven fabric of the bonding, for example a heat embossed, It is performed by a needle punch, a water jet punch, an ultrasonic welder, or the like.
不織布の延伸装置は、通常周速の異なるローラより構
成される。なお、その際の不織布の通布方式はニップ方
式、Ｓ字掛け方式のいずれの方式でもよい。A stretching device for a nonwoven fabric is usually composed of rollers having different peripheral speeds. In this case, the passing method of the nonwoven fabric may be any of a nip method and an S-shaped hanging method.
延伸倍率は高い程望ましいが、上限を４倍としたの
は、これ以上だとウェブの延伸切れを来すようになるた
めである。The higher the draw ratio, the better, but the upper limit is set to 4 times, because if it is more than this, the web may break.
図は本方法で使用する延伸装置の一例を示すもので、
誘導加熱方式の加熱ロール１、２の送出側にはロール２
より周速の大なるロール３が設けてあり、送込み側のロ
ール４、５には通布されるウェブ６を加熱するための赤
外線ヒータ７が配置されている。８は原反のウェブが巻
取られたロールであり、９は延伸ウェブを巻取るロール
である。The figure shows an example of a stretching device used in this method,
Roll 2 is provided on the delivery side of heating rolls 1 and 2 of the induction heating method.
A roll 3 having a higher peripheral speed is provided, and an infrared heater 7 for heating a web 6 to be passed is disposed on the rolls 4 and 5 on the feeding side. Reference numeral 8 denotes a roll on which the web of raw material is wound, and 9 denotes a roll on which the stretched web is wound.
本装置によれば、ロール８より繰出されたウェブ６
は、赤外線ヒータ７、加熱ロール１、２で加熱されたの
ち、延伸部のロール２、３間で延伸され、各ロールを経
てロール９に巻取られる。According to the present apparatus, the web 6 fed from the roll 8
After being heated by the infrared heater 7 and the heating rolls 1 and 2, it is stretched between the rolls 2 and 3 of the stretching section, and wound on the roll 9 via each roll.
作用 フィラメントが縦並びになっているスパンボンド不織
布を縦方向に延伸すると、フィラメントが延伸方向に配
列するとともにウェブを構成するフィラメント自体に延
伸がかゝり、このため流れ方向（縦方向）の引張強度や
変形係数が向上する。横方向については、伸びが保持さ
れ、伸縮性に富んだウェブとなる。Action When a spunbonded nonwoven fabric in which filaments are arranged vertically is stretched in the longitudinal direction, the filaments are arranged in the stretching direction and the filaments constituting the web are stretched, so that the tensile strength in the flow direction (longitudinal direction). And the deformation coefficient are improved. In the transverse direction, elongation is maintained, and a web with high elasticity is obtained.
ここで変形係数とは、ヤング率的なもので、初期強度
を表わす係数である。Here, the deformation coefficient is a coefficient similar to Young's modulus and represents the initial strength.
実施例−１と比較例−１ 繊度２デニール（Ｄ）、目付25g/m2のポリプロピレン
製スパンボンド不織布を、図示する延伸装置を使用して
140〜160℃に加熱し、縦方向に２倍延伸した不織布を得
た。該不織布と未延伸不織布の物性をそれぞれ表の実施
例−１と比較例−１に示す。Comparative Example 1 having a fineness 2 denier as in Example 1 (D), the basis weight 25 g / m 2 polypropylene spunbond nonwoven, using a stretching device illustrated
The nonwoven fabric was heated to 140 to 160 ° C. and stretched twice in the machine direction. The physical properties of the nonwoven fabric and the unstretched nonwoven fabric are shown in Example-1 and Comparative Example-1 in the table, respectively.
実施例−２及び−３と比較例−２ 繊度４デニール（Ｄ）、目付20g/m2のポリプロピレン
製スパンボンド不織布を、図示する延伸装置を使用して
実施例−１と同様、縦方向に２倍及び３倍延伸した不織
布を得た。これら得られた不織布と未延伸不織布の物性
をそれぞれ表の実施例−２及び−３と比較例−２に示
す。Comparative Example -2 fineness 4 deniers to Example 2 and -3 (D), a polypropylene spunbonded nonwoven having a mass per unit area of 20 g / m 2, as in Example 1 using the drawing apparatus shown in the vertical direction The nonwoven fabric stretched by 2 times and 3 times was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples 2 and 3 and Comparative Example 2 in the table, respectively.
実施例−４及び−５と比較例−３ 繊度４デニール（Ｄ）、目付40g/m2のポリプロピレン
製スパンボンド不織布を、図示する延伸装置を使用して
実施例−１と同様、縦方向に２倍及び３倍延伸した不織
布を得た。これら得られた不織布と未延伸不織布の物性
をそれぞれ表の実施例−４及び−５と比較例−３に示
す。Comparative Example -3 fineness 4 deniers to Example 4 and -5 (D), a polypropylene spunbonded nonwoven having a mass per unit area of 40 g / m 2, as in Example 1 using the drawing apparatus shown in the vertical direction The nonwoven fabric stretched by 2 times and 3 times was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples-4 and -5 and Comparative Example-3 in the table, respectively.
実施例−６及び−７と比較例−４ 繊度８デニール（Ｄ）、目付40g/m2のポリプロピレン
製スパンボンド不織布を、図示する延伸装置を使用して
実施例−１と同様、縦方向に２倍及び３倍延伸した不織
布を得た。これら得られた不織布と未延伸不織布の物性
をそれぞれ表の実施例−６及び−７と比較例−４に示
す。Comparative Example -4 fineness 8 denier as in Example 6 and -7 (D), a polypropylene spunbonded nonwoven having a mass per unit area of 40 g / m 2, as in Example 1 using the drawing apparatus shown in the vertical direction The nonwoven fabric stretched by 2 times and 3 times was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples -6 and -7 and Comparative Example-4 in the table, respectively.
実施例−８及び−９と比較例−５ 繊度15デニール（Ｄ）、目付40g/m2のポリプロピレン
製スパンボンド不織布を、図示する延伸装置を使用して
実施例−１と同様、縦方向に２倍及び３倍延伸した不織
布を得た。これら得られた不織布と未延伸不織布の物性
をそれぞれ表の実施例−８及び−９と比較例−５に示
す。Comparative Example -5 fineness 15 denier as in Example 8 and -9 (D), a polypropylene spunbonded nonwoven having a mass per unit area of 40 g / m 2, as in Example 1 using the drawing apparatus shown in the vertical direction The nonwoven fabric stretched by 2 times and 3 times was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples -8 and -9 and Comparative Example -5 in the table, respectively.
実施例−10、−11及び−12と比較例−６ 繊度４デニール（Ｄ）、目付130g/m2のポリプロピレ
ン製スパンボンド不織布を、図示する延伸装置を使用し
て実施例−１と同様、縦方向に２倍、３倍及び４倍延伸
した不織布を得た。これら得られた不織布と未延伸不織
布の物性をそれぞれ表の実施例−10、−11及び−12と比
較例−４に示す。Examples -10, -11 and -12 and Comparative Example -6 A polypropylene spunbonded nonwoven fabric having a fineness of 4 denier (D) and a basis weight of 130 g / m 2 was prepared in the same manner as in Example 1 using the illustrated stretching apparatus. A nonwoven fabric stretched two, three and four times in the machine direction was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples -10, -11 and -12 and Comparative Example-4 in the table, respectively.
実施例−13、−14及び−15と比較例−７ 繊度６デニール（Ｄ）、目付200g/m2のポリプロピレ
ン製スパンボンド不織布を、図示する延伸装置を使用し
て実施例−１と同様、縦方向に２倍、３倍及び４倍延伸
した不織布を得た。これら得られた不織布と未延伸不織
布の物性をそれぞれ表の実施例−13、−14及び−15と比
較例−７に示す。Examples -13, -14 and -15 and Comparative Example -7 A polypropylene spunbonded nonwoven fabric having a fineness of 6 denier (D) and a basis weight of 200 g / m 2 was prepared in the same manner as in Example 1 using the illustrated stretching apparatus. A nonwoven fabric stretched two, three and four times in the machine direction was obtained. The physical properties of the obtained nonwoven fabric and unstretched nonwoven fabric are shown in Examples-13, -14 and -15 and Comparative Example-7 in the table, respectively.
発明の効果 本発明は以上のように、縦横の引張強度比が0.8〜５
であるポリプロピレン製スパンボンド不織布を延伸倍率
２〜４倍で縦方向に延伸して縦横の引張強度比を延伸前
の強度比に対して２〜15倍にしてなるもので、引張強度
の縦横比が特定範囲のものを特定倍率で延伸するという
シンプルな方法により縦横の引張強度比を上げて縦方向
の引張強度を最高３倍程度、変形係数を最高14倍程度ま
で向上することができ、しかも横方向にも伸びを保持し
て伸縮性に富み、縦裂けを防いで取扱いに優れた不織布
が得られ、このため土木資材、ことに盛土の補強や排水
材のように一方向の強度のみが要求される分野に使用す
るのに好適である。 Effect of the Invention As described above, the present invention has a tensile strength ratio of 0.8 to 5
The spunbond nonwoven fabric made of polypropylene is stretched in the machine direction at a draw ratio of 2 to 4 times to make the tensile strength ratio in the longitudinal and transverse directions 2 to 15 times the strength ratio before stretching. By using a simple method of stretching a specific range at a specific magnification, the tensile strength ratio in the vertical and horizontal directions can be increased to improve the tensile strength in the vertical direction up to about 3 times and the deformation coefficient up to about 14 times. A non-woven fabric that retains elongation in the horizontal direction and has excellent elasticity, prevents vertical tearing, and is excellent in handling is obtained.Therefore, only one-directional strength such as civil engineering materials, especially embankment reinforcement and drainage material is obtained. Suitable for use in required fields.
第１図は本発明方法で使用される延伸装置のフロー図で
ある。 １、２……加熱ロール、３、４、５、８、９、……ロー
ル ６……ウェブ、７……赤外線ヒータFIG. 1 is a flow chart of a stretching apparatus used in the method of the present invention. 1, 2, heating roll, 3, 4, 5, 8, 9, roll 6, web 7, infrared heater
Claims (1)
ロピレン製スパンボンド不織布を延伸装置により延伸倍
率２〜４倍で縦方向に延伸して縦横の引張強度比を延伸
前の強度比に対して２〜15倍にすることを特徴とする不
織布の製造方法。1. A polypropylene spunbonded nonwoven fabric having a tensile strength ratio of 0.8 to 5 in the longitudinal direction is stretched in a longitudinal direction at a stretching ratio of 2 to 4 times by a stretching device, and the tensile strength ratio in the longitudinal and transverse directions is reduced to the strength ratio before stretching. A method for producing a nonwoven fabric, which is 2 to 15 times as large as the nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157440A JP2587461B2 (en) | 1988-06-24 | 1988-06-24 | Nonwoven fabric manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157440A JP2587461B2 (en) | 1988-06-24 | 1988-06-24 | Nonwoven fabric manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01321962A JPH01321962A (en) | 1989-12-27 |
| JP2587461B2 true JP2587461B2 (en) | 1997-03-05 |
Family
ID=15649695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63157440A Expired - Lifetime JP2587461B2 (en) | 1988-06-24 | 1988-06-24 | Nonwoven fabric manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2587461B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000046023A2 (en) * | 1999-02-02 | 2000-08-10 | The Procter & Gamble Company | Elastic laminate and disposable article including spunbonded nonwoven of polypropylene/polyethylene copolymer |
| JP4662342B2 (en) * | 2005-02-24 | 2011-03-30 | 食肉生産技術研究組合 | Loin and Rose Bone Deboning Device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942772A (en) * | 1972-08-30 | 1974-04-22 | ||
| US4088731A (en) * | 1976-07-28 | 1978-05-09 | Clupak, Inc. | Method of softening nonwoven fabrics |
| JPS6025541B2 (en) * | 1976-09-22 | 1985-06-19 | 日本バイリ−ン株式会社 | High-strength nonwoven fabric made of fine fibers and method for producing the same |
| DE2900888A1 (en) * | 1979-01-11 | 1980-07-24 | Lentia Gmbh | Spun filament felting - is constructed to have a higher shear resistance in one direction |
| JPS6034661A (en) * | 1983-08-02 | 1985-02-22 | 旭化成株式会社 | Production of polypropylene nonwoven fabric |
| JPH01148861A (en) * | 1987-07-14 | 1989-06-12 | Polymer Processing Res Inst | Production of stretched orthogonal nonwoven fabric |
-
1988
- 1988-06-24 JP JP63157440A patent/JP2587461B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01321962A (en) | 1989-12-27 |
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