JPS6256254B2 - - Google Patents
Info
- Publication number
- JPS6256254B2 JPS6256254B2 JP56186336A JP18633681A JPS6256254B2 JP S6256254 B2 JPS6256254 B2 JP S6256254B2 JP 56186336 A JP56186336 A JP 56186336A JP 18633681 A JP18633681 A JP 18633681A JP S6256254 B2 JPS6256254 B2 JP S6256254B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- barrier
- injection port
- speed water
- nonwoven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 230000004888 barrier function Effects 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 21
- 239000004745 nonwoven fabric Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000011176 pooling Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
Description
本発明は、支持体に導いた繊維ウエブにノズル
の噴出口を対向させ、該噴射口から噴射される高
速水流を該繊維ウエブに衝突させて該繊維ウエブ
の繊維を交絡させることにより不織布を製造する
ために用いる該ノズル構造の改良に関する。
本発明者らは、高速水流処理により不織布を製
造するに際して、繊維ウエブの繊維の交絡処理の
安定性、効率を高め、不織布の生産性を向上させ
るための諸種の技術的課題およびそれらの極めて
有効な解決策を特願昭54―87085号、同55―
114151号において既に提案したが、それらの解決
策のほかに、次のことも重要な要素であることが
判明した。すなわち、高速水流処理により不織布
を製造する場合のノズルの機能は、高圧ポンプに
より得られた高圧水（静的エネルギー）をノズル
の噴射口から噴出させて高速水流（動的エネルギ
ー）となし、これを繊維ウエブに効率よく作用さ
せることにあるが、かく高圧水を静的エネルギー
から動的エネルギーに変換する場合、圧力損失を
最小限にするとともに、効率を低下させることな
く該噴射口からの水量をコントロールするために
は、とくに前記特願昭55―114151号においても既
に提案したとおり、ノズルとしては、垂直断面形
が噴射口に向つて漸次小径になつた部分６と直状
になつた部分７からなり、該直状小径になつた部
分７の長さをＬとし、直径をＤとすると、その比
率Ｌ／Ｄが4/1以下である噴射孔８を有するもの
が好ましく、なおまた該噴射口の径が0.05〜0.2
mm、該噴射口のピツチが0.5〜10mmのものを用い
ることも好ましいが、それらの条件のほかに、該
噴射口から噴射された水流の該噴射口近傍におけ
る挙動が悪影響を与えるため、これを該噴射口の
外側部の構造を改良することにより最小限にする
ことが好ましいことが判明した。
この悪影響について第１図ないし第３図を参照
して説明する。第１図は水不透過性ロール状支持
体１と、下面に所定ピツチで穿設した噴射口（矢
印ａ部分）が支持体１の頂面と所定の距離（高
さ）をおいて位置するように支持体１の長手方向
に沿つて配置した長尺ノズル２とからなる交絡処
理部に繊維ウエブ３を導いてその繊維の交絡処理
を行う状態を示す概略斜視図、第２図、第３図は
同上の垂直方向の部分拡大断面図である。矢印ｂ
の方向へ回転する支持体１上に載置されて矢印ｃ
方向へ移動する繊維ウエブ３に噴射口４から高速
水流５を噴出させ、これを繊維ウエブ３に衝突さ
せることによりその繊維の交絡処理を行うとき、
これが第２図に示す低速処理である場合も第３図
に示す高速処理である場合も、それらの図に符号
５ａで示すように噴射口４と繊維ウエブ３との間
に排水の溜まり現象が発生し、その溜り現象５ａ
は高速処理の場合ほど大きくなる。かかる溜り現
象５ａは、高速水流５による繊維ウエブ３の繊維
の交絡処理の効率を低下させる。またかかる溜り
現象５ａは、噴射口４と支持体１との距離を大き
くすれば緩和されるが、逆に高速水流５中に空気
を巻き込み、繊維ウエブ３の地合を乱す現象が発
生する。
そこで、本発明者らは、上述のような欠点を排
除するための有効なノズルを得ることを目的とし
て種々検討を重ねた結果、噴射口の両側に連続し
て位置し、かつ該噴射口の仮想中心綿と並行する
内側面を有する障壁を有するノズルが最も好まし
いものであることを見出し、本発明に到達した。
第４図は本発明の実施態様にかかるノズルの垂
直方向の部分拡大断面図、第５図は同上ノズルの
下部を上部に向けた部分拡大斜視図、第６図は同
上のノズルを支持体上に配置した状態のそれらの
垂直方向の部分拡大断面図、第７図は本発明の他
の実施態様にかかるノズルの垂直方向の部分拡大
断面図、第８図は同上のノズルの下部を上部に向
けた部分拡大斜視図である。
第４図ないし第５図に示すノズル２は、その本
体が第１図ないし第３図に示したものと同じであ
つて、噴射口４の両側には、ノズル２の表材の一
部を突出させることにより長手方向に連続し相対
向する障壁９，９を設けてある。障壁９，９は、
第７図、第８図に示すように噴射口４が位置する
ノズル２の下面に凹溝を形成することにより設け
てあつてもよく、さらに障壁９，９は、耐水性、
耐衝撃性を有するものであれば、金属、ゴム、プ
ラスチツクスの単独または複合体であつても、ま
たノズル２とは別体に形成してこれをノズル２に
取付けたものであつてもよいが、第３図に示すよ
うに障壁９，９の内側面と噴射口４の仮想中心線
１０との距離Ｗは、５mm以下であることが好まし
く、さらには３mm以下であることが好ましく、か
つ障壁９，９の高さＨは、２〜20mmであることが
好ましく、さらには３〜15mmであることが好まし
い。前記距離Ｗが前記上限値以上であると、障壁
９，９を設けた効果がなく、また前記高さＨが前
記下限値以下であると、障壁９，９を設けた効果
がなく、かつ前記高さＨが前記上限値以上である
と、噴射口４と繊維ウエブ３との距離が大きくな
り、噴射口４からの高速水流５が障壁９，９の内
側面に当り、繊維ウエブ３の繊維の交絡処理効果
が減少する。ちなみに、前記距離Ｗの下限は、噴
射口４からの高速水流５が障壁９，９の内側面に
当らない値になされる。
かかる構成を有するノズル２は、第５図に示す
ように水不透過性ロール状支持体１上に、その頂
面と噴射口４との距離を好ましくは50mm以下に保
つた状態で、しかもその頂面に噴射口が対向する
ように支持体１の長手方向に沿つて配置される。
第５図において矢印ｂの方向へ回転する支持体１
上に載置されて矢印ｃの方向へ移動する繊維ウエ
ブ３に噴射口４から噴出される高速水流５を衝突
させて繊維ウエブ３の繊維の交絡処理を行うと
き、ノズル２の下面と繊維ウエブ３との間に、場
合により、僅かな排水の溜り現象５ａが発生する
ことがあるが、第１図ないし第３図に示すノズル
２のように障壁９，９を設けない場合に比較し
て、該発生を著しく減少させることができる。な
お、前記距離が50mm以上であれば、高速水流５中
に空気を巻き込み、繊維ウエブ３の地合を乱す現
象が発生し、かつその距離の下限は、障壁９，９
の高さＨと繊維ウエブ３の厚さとの合計値により
規制されることは、繊維ウエブ３の移動を可能な
らしめる必要上いうまでもない。
実施例
1.4d×51mmのポリエステル繊維からなる目付40
ｇ／m2のパラレルウエブを硬度100゜（JIS―
6301Hs）を有する水不透過性ロール状支持体上
に導き、直状小径になつた部分の長さが200μ、
その噴射口の直径が130μであるノズルから、噴
射圧30Kｇ／cm2、前記支持体のそれぞれにおける
幅方向平均供給量が10c.c.／sec・cmになるように
した高速水流により前記ウエブを処理し不織布を
得た。その際に用いたノズルの障壁条件、排水・
ウエブ地合状態、製品の性能を下表に示す。
The present invention produces a nonwoven fabric by arranging a nozzle jet to face a fibrous web guided to a support, and colliding a high-speed water stream jetted from the jet into the fibrous web to entangle the fibers of the fibrous web. The present invention relates to improvements in the nozzle structure used for this purpose. The present inventors have discovered various technical issues and their extremely effective methods for increasing the stability and efficiency of the fiber entanglement treatment of a fibrous web and improving the productivity of nonwoven fabrics when producing nonwoven fabrics by high-speed water treatment. Patent application No. 87085, No. 55--
In addition to the solutions already proposed in No. 114151, the following were also found to be important factors: In other words, the function of the nozzle when manufacturing nonwoven fabrics by high-speed water jet processing is to jet high-pressure water (static energy) obtained by a high-pressure pump from the nozzle nozzle and turn it into a high-speed water flow (dynamic energy). The purpose is to efficiently act on the fiber web, but when converting high-pressure water from static energy to dynamic energy, the pressure loss is minimized and the amount of water from the injection port is reduced without reducing efficiency. In order to control this, as already proposed in the above-mentioned Japanese Patent Application No. 55-114151, the nozzle should have a vertical cross section that gradually becomes smaller in diameter toward the injection port and a straight section. 7, and if the length of the portion 7 that has become a small diameter is L and the diameter is D, it is preferable to have an injection hole 8 whose ratio L/D is 4/1 or less, and The diameter of the injection port is 0.05~0.2
It is also preferable to use an injection port with a pitch of 0.5 to 10 mm, but in addition to these conditions, the behavior of the water stream injected from the injection port in the vicinity of the injection port has an adverse effect, so this is not recommended. It has been found that it is preferable to minimize this by improving the structure of the outer part of the injection orifice. This adverse effect will be explained with reference to FIGS. 1 to 3. FIG. 1 shows a water-impermeable roll-shaped support 1, and injection ports (points indicated by arrows a) drilled at a predetermined pitch on the lower surface are located at a predetermined distance (height) from the top surface of the support 1. 2 and 3 are schematic perspective views showing a state in which the fiber web 3 is guided to an entangling treatment section consisting of elongated nozzles 2 arranged along the longitudinal direction of the support 1 and the fibers are entangled. The figure is a partially enlarged vertical sectional view of the same as above. arrow b
It is placed on a support 1 rotating in the direction of arrow c.
When a high-speed water stream 5 is ejected from the injection port 4 onto the fibrous web 3 moving in the direction, and the fibers are entangled by colliding with the fibrous web 3,
Whether this is the low-speed processing shown in Fig. 2 or the high-speed processing shown in Fig. 3, there is a phenomenon in which wastewater accumulates between the injection port 4 and the fiber web 3, as shown by reference numeral 5a in these figures. Occurrence and accumulation phenomenon 5a
becomes larger in the case of high-speed processing. Such pooling phenomenon 5a reduces the efficiency of the intertwining treatment of the fibers of the fibrous web 3 by the high-speed water stream 5. Further, such a pooling phenomenon 5a can be alleviated by increasing the distance between the injection port 4 and the support 1, but on the other hand, a phenomenon occurs in which air is drawn into the high-speed water flow 5 and the formation of the fiber web 3 is disturbed. Therefore, as a result of various studies aimed at obtaining an effective nozzle to eliminate the above-mentioned drawbacks, the present inventors found that a nozzle that is located continuously on both sides of the injection port and that is It has been found that a nozzle with a barrier having an inner surface parallel to the virtual center cotton is most preferred, leading to the present invention. FIG. 4 is a partially enlarged vertical sectional view of a nozzle according to an embodiment of the present invention, FIG. 5 is a partially enlarged perspective view of the same nozzle with the lower part facing upward, and FIG. FIG. 7 is a partially enlarged vertical sectional view of a nozzle according to another embodiment of the present invention, and FIG. FIG. The nozzle 2 shown in FIGS. 4 and 5 has the same main body as that shown in FIGS. Barriers 9, 9 are provided which are continuous in the longitudinal direction and oppose each other by protruding. Barriers 9, 9 are
As shown in FIGS. 7 and 8, they may be provided by forming a concave groove on the lower surface of the nozzle 2 where the injection port 4 is located, and the barriers 9, 9 may have water resistance,
As long as it has impact resistance, it may be made of metal, rubber, or plastic alone or in combination, or it may be formed separately from the nozzle 2 and attached to the nozzle 2. However, as shown in FIG. 3, the distance W between the inner surfaces of the barriers 9, 9 and the virtual center line 10 of the injection port 4 is preferably 5 mm or less, more preferably 3 mm or less, and The height H of the barriers 9, 9 is preferably 2 to 20 mm, more preferably 3 to 15 mm. If the distance W is greater than or equal to the upper limit value, there is no effect of providing the barriers 9, 9, and if the height H is less than or equal to the lower limit value, there is no effect of providing the barriers 9, 9, and When the height H is greater than or equal to the upper limit value, the distance between the injection port 4 and the fibrous web 3 becomes large, and the high-speed water flow 5 from the injection port 4 hits the inner surfaces of the barriers 9, 9, causing the fibers of the fibrous web 3 to The confounding treatment effect of is reduced. Incidentally, the lower limit of the distance W is set to a value that does not allow the high-speed water flow 5 from the injection port 4 to hit the inner surfaces of the barriers 9, 9. As shown in FIG. 5, the nozzle 2 having such a configuration is mounted on a water-impermeable roll support 1 with the distance between its top surface and the injection port 4 preferably kept at 50 mm or less, and The support body 1 is arranged along the longitudinal direction so that the injection ports face the top surface.
Support 1 rotating in the direction of arrow b in FIG.
When the fibers of the fibrous web 3 are intertwined by colliding with the fibrous web 3 placed on top of the fibrous web 3 and moving in the direction of the arrow c, a high-speed water stream 5 ejected from the injection port 4 collides with the fibrous web 3. 3, a slight accumulation phenomenon 5a of wastewater may occur depending on the case, but compared to the case where barriers 9, 9 are not provided as in the nozzle 2 shown in FIGS. 1 to 3, , the occurrence can be significantly reduced. Note that if the distance is 50 mm or more, air will be drawn into the high-speed water flow 5 and the formation of the fiber web 3 will be disturbed.
Needless to say, it is regulated by the total value of the height H of the fiber web 3 and the thickness of the fiber web 3 because it is necessary to enable the movement of the fiber web 3. Example: Fabric weight 40 made of 1.4d x 51mm polyester fiber
g/ m2 parallel web with hardness of 100° (JIS-
6301H s ) on a water-impermeable roll-shaped support, the length of the straight small diameter part is 200μ,
The web is sprayed from a nozzle with a diameter of 130 μm at a jet pressure of 30 kg/cm 2 and an average supply amount in the width direction of each of the supports at a speed of 10 c.c./sec.cm. A nonwoven fabric was obtained by processing. Barrier conditions of the nozzle used at that time, drainage and
The web formation condition and product performance are shown in the table below.
【表】
上述のごとく本発明のノズルによれば、高速水
流処理による不織布の製造に当り、噴射口の両側
に障壁を設けてないノズルを用いる場合に生ずる
排水の溜り現象の発生をなくすことができ、した
がつて繊維ウエブの繊維の交絡処理の安定性、効
率を高め、生産性を向上させることができるなど
の効果があり、実用に供しきわめて有益である。[Table] As described above, according to the nozzle of the present invention, it is possible to eliminate the phenomenon of pooling of waste water that occurs when a nozzle without barriers on both sides of the injection port is used in the production of nonwoven fabric by high-speed water treatment. Therefore, it has the effect of increasing the stability and efficiency of the fiber entanglement treatment of the fiber web and improving productivity, and is extremely useful in practical use.
第１図は障壁を設けてないノズルを支持体上に
配置した状態の斜視図、第２図、第３図は同上の
垂直方向の部分拡大断面図、第４図は本発明の実
施態様にかかるノズルの垂直方向の部分拡大断面
図、第５図は同上ノズルの下部を上部に向けた部
分拡大斜視図、第６図は同上のノズルを支持体上
に配置した状態のそれらの垂直方向の部分拡大断
面図、第７図は本発明の他の実施態様にかかるノ
ズルの垂直方向の部分拡大断面図、第８図は同上
のノズルの下部を上部に向けた部分拡大斜視図で
ある。
１……支持体、２……ノズル、３……繊維ウエ
ブ、４……噴射口、５……高速水流、５ａ……排
水の溜り現象、９……障壁、１０……仮想中心
線。
FIG. 1 is a perspective view of a nozzle without a barrier placed on a support, FIGS. 2 and 3 are vertical partial enlarged sectional views of the same, and FIG. 4 is an embodiment of the present invention. FIG. 5 is a partially enlarged vertical sectional view of such a nozzle, FIG. 5 is a partially enlarged perspective view of the same nozzle with the lower part facing upward, and FIG. FIG. 7 is a partially enlarged vertical sectional view of a nozzle according to another embodiment of the present invention, and FIG. 8 is a partially enlarged perspective view of the same nozzle with the lower part facing upward. DESCRIPTION OF SYMBOLS 1... Support body, 2... Nozzle, 3... Fibrous web, 4... Injection port, 5... High-speed water flow, 5a... Drainage accumulation phenomenon, 9... Barrier, 10... Virtual center line.
Claims (1)
持体上の繊維ウエブに対向するように長尺ノズル
を配置し、該噴射口から噴射される高速水流によ
り該繊維ウエブの繊維を交絡させて不織布を製造
するための該ノズルにおいて、前記噴射口の両側
に連続し相対向して位置し、かつ該噴射口の仮想
中心線と並行する内側面を有する障壁を前記ノズ
ルに設けてあることを特徴とする高速水流処理に
よる不織布製造に用いるためのノズル構造。 ２ ノズルの障壁は、該障壁の内側面と噴射口の
仮想中心線との距離が５mm以下であり、かつ該障
壁の高さが２〜20mmであるように設けてあるとこ
ろの特許請求の範囲第１項記載の、高速水流処理
による不織布製造に用いるためのノズル構造。 ３ ノズルの障壁は、該ノズルの素材の一部を突
出させて設けてあるところの特許請求の範囲第１
項記載の、高速水流処理による不織布製造に用い
るためのノズル構造。 ４ ノズルの障壁は、該ノズルとは別体に形成し
た障壁を該ノズルに取付けてあるところの特許請
求の範囲第１項記載の、高速水流処理による不織
布製造に用いるためのノズル構造。[Scope of Claims] 1. A long nozzle is disposed such that jet ports formed at intervals in the longitudinal direction face the fiber web on a support, and the fibers are sprayed by a high-speed water stream jetted from the jet ports. In the nozzle for manufacturing a nonwoven fabric by intertwining fibers of a web, a barrier is provided on both sides of the injection port and has an inner surface parallel to the imaginary center line of the injection port. A nozzle structure for use in manufacturing nonwoven fabric by high-speed water treatment, characterized by being provided in a nozzle. 2. Claims that the barrier of the nozzle is provided such that the distance between the inner surface of the barrier and the virtual center line of the injection port is 5 mm or less, and the height of the barrier is 2 to 20 mm. 2. A nozzle structure for use in manufacturing a nonwoven fabric by high-speed water treatment, as described in item 1. 3. The barrier of the nozzle is provided by protruding a part of the material of the nozzle.
A nozzle structure for use in producing nonwoven fabrics by high-speed water treatment as described in 2. 4. A nozzle structure for use in manufacturing a nonwoven fabric by high-speed water treatment according to claim 1, wherein the barrier of the nozzle is a barrier formed separately from the nozzle and attached to the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56186336A JPS5887352A (en) | 1981-11-20 | 1981-11-20 | Nozzle structure used in producing nonwoven fabric due to high speed water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56186336A JPS5887352A (en) | 1981-11-20 | 1981-11-20 | Nozzle structure used in producing nonwoven fabric due to high speed water treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5887352A JPS5887352A (en) | 1983-05-25 |
| JPS6256254B2 true JPS6256254B2 (en) | 1987-11-25 |
Family
ID=16186559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56186336A Granted JPS5887352A (en) | 1981-11-20 | 1981-11-20 | Nozzle structure used in producing nonwoven fabric due to high speed water treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5887352A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202014101647U1 (en) * | 2014-04-08 | 2015-07-09 | Autefa Solutions Germany Gmbh | nozzle beam |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3403862A (en) * | 1967-01-06 | 1968-10-01 | Du Pont | Apparatus for preparing tanglelaced non-woven fabrics by liquid stream jets |
| US3485706A (en) * | 1968-01-18 | 1969-12-23 | Du Pont | Textile-like patterned nonwoven fabrics and their production |
-
1981
- 1981-11-20 JP JP56186336A patent/JPS5887352A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3403862A (en) * | 1967-01-06 | 1968-10-01 | Du Pont | Apparatus for preparing tanglelaced non-woven fabrics by liquid stream jets |
| US3485706A (en) * | 1968-01-18 | 1969-12-23 | Du Pont | Textile-like patterned nonwoven fabrics and their production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5887352A (en) | 1983-05-25 |
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