JP2579658B2 - Manufacturing method of heat-resistant nonwoven fabric - Google Patents
Manufacturing method of heat-resistant nonwoven fabricInfo
- Publication number
- JP2579658B2 JP2579658B2 JP63023974A JP2397488A JP2579658B2 JP 2579658 B2 JP2579658 B2 JP 2579658B2 JP 63023974 A JP63023974 A JP 63023974A JP 2397488 A JP2397488 A JP 2397488A JP 2579658 B2 JP2579658 B2 JP 2579658B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- heat
- pores
- temperature
- pas
- 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.)
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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、ポリ（アリーレンスルフイド）からなる耐
熱性不織布の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a heat-resistant nonwoven fabric made of poly (arylene sulfide).
従来の技術 ポリ（アリーレンスルフイド）（以下、PASとい
う。）を溶融紡糸して単繊維やヤーン等にする方法は、
特公昭52−30609号、特開昭58−31112号公報、米国特許
第3895091号、同3898204号、同3921695号明細書等に記
載されているように公知である。2. Description of the Related Art A method of melt-spinning poly (arylene sulfide) (hereinafter referred to as PAS) into single fibers or yarns is as follows.
It is known as described in JP-B-52-30609, JP-A-58-31112, U.S. Pat. Nos. 3,89,509, 3,89,284, and 3,216,955.
これらの紡糸方法においては、繊維の延伸は、巻取り
或いは冷却空気で引張ることにより行なわれる。In these spinning methods, the fiber is drawn by winding or drawing by cooling air.
又、PASを溶融紡糸し、積層して不織布を形成する方
法も、特開昭57−16954号公報に記載されているが、こ
の場合紡糸されたフイラメントは、空気アスピレーター
により引張られ延伸されている。Further, a method of melt-spinning PAS and forming a non-woven fabric by lamination is also described in JP-A-57-16954. .
しかし、この方法において、空気アスピレーターは冷
却空気を用いるものであり、延伸も不充分であり、従つ
て繊維径も太く、得られる不織布は堅くて風合いも良く
なく、又強度も充分とは言えない。However, in this method, the air aspirator uses cooling air, is insufficiently stretched, and therefore has a large fiber diameter, and the resulting nonwoven fabric is hard, has a poor feel, and has insufficient strength. .
発明が解決しようとする課題 本発明は、嵩高く、風合いも良く、かつ強度も大きく
化学的に安定で、耐熱性に優れるPAS製不織布の製造方
法を提供することを目的とする。Problems to be Solved by the Invention An object of the present invention is to provide a method for producing a PAS nonwoven fabric which is bulky, has a good feel, has high strength, is chemically stable, and has excellent heat resistance.
課題を解決するための手段 上記の目的を果すためには、少なくとも繊維径を極端
に細くする必要があるが、PASは融点が高く、高温では
架橋反応を起こし、樹脂の粘度が増大し、紡糸が困難と
なる。従つて連続した極細繊維からなる不織布は実現さ
れていなかつた。Means for Solving the Problems In order to achieve the above object, it is necessary to at least extremely reduce the fiber diameter, but PAS has a high melting point, causes a crosslinking reaction at high temperatures, increases the viscosity of the resin, Becomes difficult. Therefore, a nonwoven fabric made of continuous ultrafine fibers has not been realized.
本発明者らは、鋭意研究を行つた結果、ポリプロピレ
ンやポリエステル等で極細繊維からなる不織布が製造さ
れている、いわゆるメルトブロー法によりPASを紡糸延
伸することにより、図らずも、本発明の目的を満たした
不織布が得られることを見出して、本発明を完成した。The present inventors have conducted intensive studies, and as a result, a nonwoven fabric made of ultrafine fibers of polypropylene, polyester, or the like has been manufactured. The inventors have found that a filled nonwoven fabric can be obtained and completed the present invention.
すなわち、本発明の要旨は、溶融したポリ（アリーレ
ンスルフイド）を、二軸押出機を用いて多数の隣接した
細孔を有する口金の該細孔から290〜400℃の温度で押出
して繊維とすると共に、該細孔に隣接した気体吹出口か
らの上記押出温度より10〜20℃高い高温気体により該繊
維を延伸し、捕集部に捕集して、繊維径0.5〜100μｍの
ポリ（アリーレンスルフイド）製連続繊維が交絡した耐
熱性不織布を得ることを特徴とする耐熱性不織布の製造
方法にある。That is, the gist of the present invention is that a molten poly (arylene sulfide) is extruded at a temperature of 290 to 400 ° C. from the pores of a die having a number of adjacent pores using a twin-screw extruder. The fiber is drawn by a high-temperature gas 10 to 20 ° C. higher than the above-mentioned extrusion temperature from the gas outlet adjacent to the pores, and collected in a collecting section, so that a poly (0.5 to 100 μm fiber diameter) A method for producing a heat-resistant nonwoven fabric, comprising obtaining a heat-resistant nonwoven fabric in which continuous fibers made of arylene sulfide are entangled.
本発明で用いられるPASは、Ｒ−Ｓの繰り返し単
位（但し、Ｒはアリーレン基である。）からなる重合体
であり、Ｒの具体例としてはフエニレン、ビフエニレ
ン、ナフタレン、ビフエニレンエーテル基等である。
又、これらの基の任意の水素原子を炭素数１〜６個の低
級アルキル基で置換した基でもよい。The PAS used in the present invention is a polymer composed of RS repeating units (where R is an arylene group). Specific examples of R include phenylene, biphenylene, naphthalene, and biphenylene ether groups. It is.
Further, a group in which an arbitrary hydrogen atom of these groups is substituted with a lower alkyl group having 1 to 6 carbon atoms may be used.
このPASは、上記アリーレン基骨格からなる化合物の
多ハロ置換体と、アルカリ金属スルフイドとを、極性溶
媒中で反応させることにより製造することができるが、
その製造法は、例えば米国特許第3354129号明細書等に
詳細に記載されている。This PAS can be produced by reacting a polyhalo-substituted compound of the above-mentioned arylene group skeleton with an alkali metal sulfide in a polar solvent,
The production method is described in detail, for example, in US Pat. No. 3,354,129.
本発明においては、上記のPASならばいずれも使用可
能であるが、特に上記の繰り返し単位のＲがフエニレン
基であるポリ（フエニレンスルフイド）（以下、PPSと
いうことがある。）が望ましく、又300℃における溶融
粘度が50〜4,000ポイズ、好ましくは200〜1,000ポイズ
のPAS、特にPPSが望ましい。さらに熱架橋していない直
鎖状のPPSが望ましく、特に融点が280〜285℃のものが
望ましい。In the present invention, any of the above PASs can be used, but in particular, poly (phenylene sulfide) (hereinafter sometimes referred to as PPS) in which R of the above repeating unit is a phenylene group is desirable. Further, PAS having a melt viscosity at 300 ° C. of 50 to 4,000 poise, preferably 200 to 1,000 poise, particularly PPS is desirable. Further, a linear PPS that is not thermally cross-linked is desirable, and particularly, one having a melting point of 280 to 285 ° C is desirable.
本発明の不織布は、溶融したPASを多数の隣接した細
孔を有する口金の該細孔から押出して繊維とすると共
に、該細孔に隣接した気体吹出口からの高温気体により
該繊維を延伸して捕集することにより得られるが、従来
のポリプロピレンやポリエステル等のメルトブロー法に
よる不織布製造の場合に比べ、製造装置について、特に
下記の点に留意しなければならない。The nonwoven fabric of the present invention extrudes molten PAS from the pores of a die having a number of adjacent pores into fibers, and stretches the fibers by a high-temperature gas from a gas outlet adjacent to the pores. However, in comparison with the conventional nonwoven fabric production method using a melt blow method such as polypropylene or polyester, the following points must be particularly noted with respect to the production apparatus.
溶融PASを口金に供給し、口金から押し出すには通常
押出機が用いられるが、該押出機としてスクリュー部、
フイード部を改良した単軸押出機や二軸押出機を用い
て、樹脂の吐出量の安定化を計る必要があり、本発明で
は二軸押出機を用いる。An extruder is usually used to supply the molten PAS to the die and extrude from the die.
It is necessary to use a single-screw extruder or a twin-screw extruder with an improved feed section to stabilize the resin discharge amount. In the present invention, a twin-screw extruder is used.
又、溶融樹脂温度が290〜400℃の高温になるために、
耐熱、断熱、熱膨張等の高温に対する対策を講じた構造
のものにする必要がある。In addition, because the molten resin temperature is as high as 290-400 ° C,
It is necessary to adopt a structure that takes measures against high temperatures such as heat resistance, heat insulation, and thermal expansion.
口金の細孔の口径は0.05〜1.0mm、望ましくは0.1〜0.
5mmである。The diameter of the pores of the base is 0.05 to 1.0 mm, preferably 0.1 to 0.
5 mm.
溶融PASの押出温度は、290〜400℃、望ましくは310〜
350℃である。又、口金からの溶融PASの吐出量は、１細
孔当り0.2〜2.0g/分、望ましくは0.4〜0.6g/分である。The extrusion temperature of the molten PAS is 290-400 ° C., preferably 310-400 ° C.
350 ° C. Further, the discharge amount of the molten PAS from the die is 0.2 to 2.0 g / min, preferably 0.4 to 0.6 g / min per one pore.
口金から押出され繊維状に形成された樹脂を誘引し、
延伸するための高温気体は、通常空気が用いられるが、
必要に応じて窒素ガス等の不活性ガスも用いることがで
きる。該気体の温度は該溶融PASの押出温度よりも10〜2
0℃高温にするのが望ましく、その噴出量は溶融PAS1kg
当り10〜100m3、望ましくは25〜60m3である。Attract the resin extruded from the die and formed into a fibrous form,
Air is usually used as the hot gas for stretching,
If necessary, an inert gas such as a nitrogen gas can be used. The temperature of the gas is 10 to 2 times higher than the extrusion temperature of the molten PAS.
It is desirable to raise the temperature to 0 ° C.
Per 10 to 100 m 3, preferably is 25~60m 3.
上記のようにして紡糸され、高温気体により延伸され
たPASからなる極細繊維は、交絡して捕集部で捕集され
てPAS不織布が形成される。The ultrafine fibers made of PAS spun as described above and drawn by the high-temperature gas are entangled and collected by the collection unit to form a PAS nonwoven fabric.
捕集部は移動するベルト状や回転するドラム状のもの
が通常使用される。捕集板の構造は、特に限定されない
が、金網状のものが望ましい。又、必要に応じて、極細
繊維が捕集される補修板の面の反対側から、吹付けられ
る気体を吸引することもできる。As the collecting unit, a moving belt or a rotating drum is generally used. The structure of the collecting plate is not particularly limited, but is preferably a wire netting. Further, if necessary, the blown gas can be sucked from the side opposite to the surface of the repair plate on which the ultrafine fibers are collected.
上記のようにして得られる該不織布は、繊維径が0.5
〜100μｍ、好ましくは１〜30μｍのPASの極細繊維の長
繊維がランダムに交絡したものであり、その目付重量は
任意であるが、通常は10〜1,000g/m2である。The nonwoven fabric obtained as described above has a fiber diameter of 0.5
Ultrafine fibers of PAS having a size of 100100 μm, preferably 1-30 μm are randomly entangled, and the basis weight is arbitrary, but is usually 10-1,000 g / m 2 .
発明の効果 本発明に係る不織布は、耐熱性に優れ、化学的に安定
である上に、0.5〜100μｍという極細繊維が交絡したも
のであることから、嵩高く、通気性及び風合いもよく、
又該繊維は高度に延伸されていることから引張強度も5k
g/5cm以上と大である。Effect of the Invention The nonwoven fabric according to the present invention is excellent in heat resistance, is chemically stable, and in addition to being entangled with ultrafine fibers of 0.5 to 100 μm, it is bulky, has good air permeability and texture,
Also, since the fiber is highly drawn, the tensile strength is 5k.
It is as large as g / 5cm or more.
従つて、このような性質を要求される分野、例えば耐
熱性フイルター材、耐熱性保温材、高温断熱遮へい材等
に用いることができる。Therefore, it can be used in fields requiring such properties, for example, a heat-resistant filter material, a heat-resistant heat insulating material, a high-temperature insulating and shielding material, and the like.
実施例 以下、本発明を実施例により詳細に説明する。Examples Hereinafter, the present invention will be described in detail with reference to examples.
実施例１ 300℃における溶融粘度が300ポイズの未架橋型ポリ
（フエニレンスルフイド）樹脂（PPS）〔（株）トープ
レン製、MP281℃〕を、出口温度が330℃の二軸押出機か
ら0.30mmφの細孔を（一列に）多数持つ口金に180g/分
で供給し、該口金温度を330℃にして、一細孔当り0.5g/
分の割合で押出して繊維状にすると共に、該細孔に隣接
した気体吹出口から8m3/分の割合で340℃の空気を高速
で吹出して該繊維を延伸し、該口金から20cm離れた回転
するドラムからなる捕集部に該繊維群を捕集して本発明
の不織布を形成した。Example 1 An uncrosslinked poly (phenylene sulfide) resin (PPS) (manufactured by Topren Co., Ltd., MP281 ° C) having a melt viscosity at 300 ° C of 300 poise was supplied from a twin-screw extruder having an outlet temperature of 330 ° C. 180g / min is supplied to a die having a large number of 0.30mmφ pores (in a line) at a temperature of 330 ° C, and 0.5g /
And extruded at a rate of 8 m 3 / min from the gas outlet adjacent to the pores at a high speed at a rate of 340 ° C. to stretch the fibers, and separated from the die by 20 cm. The group of fibers was collected in a collecting section composed of a rotating drum to form a nonwoven fabric of the present invention.
この不織布は、繊維径が２〜11μｍの連続極細繊維が
ランダムに交絡しており、目付重量は98.8g/m2であつ
た。又、通気度は30.0cc/cm2/秒、（試験法:JIS L 101
8）、引張強度5.90kg/50mm（試験法:JIS L 1018）、引
張伸度12.8％（試験法:JIS L 1018）であつた。In this nonwoven fabric, continuous ultrafine fibers having a fiber diameter of 2 to 11 μm were randomly entangled, and the basis weight was 98.8 g / m 2 . The air permeability is 30.0 cc / cm 2 / sec. (Test method: JIS L 101
8), the tensile strength was 5.90 kg / 50 mm (test method: JIS L 1018), and the tensile elongation was 12.8% (test method: JIS L 1018).
比較例 実施例１で用いたPPSを0.7mmφの細孔を20個持つ口金
から、330℃で、一細孔当り0.3g/分の割合で押出して繊
維状とし、口金下方60cmに取付けられた空気アスピレー
ターに供給した。該アスピレーターは空気速度が平均7,
000m/分の流れを形成しており、この中に該繊維状体を
誘導することにより、該繊維状体は約1,700m/分の速度
で該アスピレーターから噴出した。Comparative Example The PPS used in Example 1 was extruded from a die having 20 pores of 0.7 mmφ at a rate of 0.3 g / min per pore at 330 ° C. into a fibrous form and attached to a position 60 cm below the die. It was supplied to an air aspirator. The aspirator has an average air speed of 7,
A flow of 000 m / min was formed, into which the fibrous material was ejected from the aspirator at a speed of about 1,700 m / min.
この際、該アスピレーター直上に電極を設置し、コロ
ナ放電により、該繊維状体に負の帯電を行つた。At this time, an electrode was placed immediately above the aspirator, and the fibrous body was negatively charged by corona discharge.
該アスピレーターから噴出された繊維群を実施例１と
同様にして捕集部に捕集して、平均繊維径13μｍ、目付
重量100.2g/m2の不織布を形成した。The fibers ejected from the aspirator were collected in the collecting section in the same manner as in Example 1 to form a nonwoven fabric having an average fiber diameter of 13 μm and a basis weight of 100.2 g / m 2 .
このようにして得られた不織布は、繊維間の絡み合い
がないため強度が弱く、その機械的強度の測定は不可能
であつた。The nonwoven fabric thus obtained had low strength because there was no entanglement between the fibers, and its mechanical strength could not be measured.
次いで、この不織布にニードルパンチ機で、針密度10
0本/cm2の条件で交絡処理を行つた後、140℃で２分間熱
処理を行つた。このものの引張強度は2.5kg/50mmであつ
た。Next, a needle density of 10 was applied to the nonwoven fabric using a needle punch machine.
After performing the confounding treatment under the condition of 0 filaments / cm 2, a heat treatment was performed at 140 ° C. for 2 minutes. Its tensile strength was 2.5 kg / 50 mm.
Claims (1)
を、二軸押出機を用いて多数の隣接した細孔を有する口
金の該細孔から290〜400℃の温度で押出して繊維とする
と共に、該細孔に隣接した気体吹出口からの上記押出温
度より10〜20℃高い高温気体により該繊維を延伸し、捕
集部に捕集して、繊維径0.5〜100μｍのポリ（アリーレ
ンスルフイド）製連続繊維が交絡した耐熱性不織布を得
ることを特徴とする耐熱性不織布の製造方法。1. A molten poly (arylene sulfide)
Is extruded at a temperature of 290 to 400 ° C. from the pores of a die having a large number of adjacent pores using a twin-screw extruder into fibers, and the above-described extrusion from a gas outlet adjacent to the pores is performed. The fiber is drawn by a high-temperature gas 10 to 20 ° C. higher than the temperature and collected in a collecting portion to obtain a heat-resistant nonwoven fabric in which continuous fibers of poly (arylene sulfide) having a fiber diameter of 0.5 to 100 μm are entangled. A method for producing a heat-resistant nonwoven fabric, comprising the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63023974A JP2579658B2 (en) | 1988-02-05 | 1988-02-05 | Manufacturing method of heat-resistant nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63023974A JP2579658B2 (en) | 1988-02-05 | 1988-02-05 | Manufacturing method of heat-resistant nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01201565A JPH01201565A (en) | 1989-08-14 |
| JP2579658B2 true JP2579658B2 (en) | 1997-02-05 |
Family
ID=12125524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63023974A Expired - Lifetime JP2579658B2 (en) | 1988-02-05 | 1988-02-05 | Manufacturing method of heat-resistant nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2579658B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016166431A (en) * | 2015-03-09 | 2016-09-15 | Dic株式会社 | Polyarylene sulfide resin fiber assembly and method for producing the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0280651A (en) * | 1988-09-16 | 1990-03-20 | Teijin Ltd | Web composed of ultrafine fiber of polyphenylene sulfide and production of the same web |
| JP2004348984A (en) * | 2003-05-20 | 2004-12-09 | Tapyrus Co Ltd | Melt blow unwoven fabric made of polyphenylene sulfide, its manufacturing method and separator made of the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716954A (en) * | 1980-06-27 | 1982-01-28 | Toray Industries | Long fiber nonwoven fabric comprising aromatic sulfide polymer fiber and method |
| JPS58152051A (en) * | 1982-03-03 | 1983-09-09 | Sumitomo Electric Ind Ltd | Polyphenylene sulfide resin composition |
| JPH0814058B2 (en) * | 1987-06-16 | 1996-02-14 | 東レ株式会社 | Polyphenylene sulfide meltblown nonwoven fabric and method for producing the same |
-
1988
- 1988-02-05 JP JP63023974A patent/JP2579658B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016166431A (en) * | 2015-03-09 | 2016-09-15 | Dic株式会社 | Polyarylene sulfide resin fiber assembly and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01201565A (en) | 1989-08-14 |
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