KR102122571B1 - Method of manufacturing dry type aramid non-woven fabric - Google Patents
Method of manufacturing dry type aramid non-woven fabric Download PDFInfo
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- KR102122571B1 KR102122571B1 KR1020150089542A KR20150089542A KR102122571B1 KR 102122571 B1 KR102122571 B1 KR 102122571B1 KR 1020150089542 A KR1020150089542 A KR 1020150089542A KR 20150089542 A KR20150089542 A KR 20150089542A KR 102122571 B1 KR102122571 B1 KR 102122571B1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4334—Polyamides
- D04H1/4342—Aromatic polyamides
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/724—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged forming webs during fibre formation, e.g. flash-spinning
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
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- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
본 발명은 -CN기가 치환된 방향족기를 포함하는 아라미드 공중합체가 용해되어 있는 중합용매를 방사구금을 통해 필라멘트 형태로 방사한 후 방사되어 응고 전인 필라멘트들에 공기를 분사하여 상기 필라멘트들을 분산 및 교차시켜 필라멘트 웹을 형성한 다음, 상기 필라멘트 웹(Web)을 고온에서 건식 건조하여 필라멘트내 용매를 제거하여 건식 아라미드 부직포를 제조한다.
본 발명은 농황산에 의한 설비부식 없이도 아라미드 필라멘트들로 구성된 부직포를 제조할 수 있다. 또한 본 발명은 종래 아라미드 단섬유 제조공정과 비교시 공정이 간소화되고, 제조원가가 저렴해지고 생산성도 향상된다.
본 발명으로 제조된 건식 아라미드 부직포는 이를 구성하는 아라미드 필라멘트가 무기염을 함유하여 극성을 갖기 때문에 미세먼지 제거용 정전 필터 소재로 특히 적합하며, 상기 아라미드 필라멘트에 크레이터(crater)가 형성되어 비표면적이 증가되기 때문에 각종 필터용 소재로도 유용하다.In the present invention, a polymerization solvent in which an aramid copolymer containing an aromatic group substituted with -CN group is dissolved is spun into a filament form through a spinneret, and then spun to disperse and cross the filaments by spraying air to filaments that are spun before being solidified. After forming the filament web, the filament web is dry dried at a high temperature to remove the solvent in the filament to prepare a dry aramid nonwoven fabric.
The present invention can produce a nonwoven fabric composed of aramid filaments without corrosion of facilities by concentrated sulfuric acid. In addition, the present invention simplifies the process compared to the conventional aramid short fiber manufacturing process, lowers the manufacturing cost and improves productivity.
The dry aramid non-woven fabric produced by the present invention is particularly suitable as an electrostatic filter material for removing fine dust because the aramid filaments constituting it have an inorganic salt and have a polarity, and a specific surface area is formed by craters formed on the aramid filaments. As it increases, it is also useful as a material for various filters.
Description
본 발명은 건식 아라미드 부직포의 제조방법에 관한 것으로서, 보다 구체적으로는 아라미드 필라멘트들로 구성된 부직포를 간소화된 공정과 높은 생산성으로 제조할 수 있는 건식 아라미드 부직포의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a dry aramid nonwoven fabric, and more particularly, to a method for manufacturing a dry aramid nonwoven fabric capable of manufacturing a nonwoven fabric composed of aramid filaments with a simplified process and high productivity.
이하, 본 발명에서는 아라미드 필라멘트들이 서로 얽히면서 교차점에서 서로 접착된 구조인 스펀본드(Spunbond)타입 또는 멜트브로운(Meltbrown)타입의 아라미드 부직포를 통칭하여 "아라미드 부직포"라고 한다.Hereinafter, in the present invention, aramid filaments are entangled with each other, and a structure called Spunbond type or Meltbrown type aramid nonwoven fabric, which is bonded to each other at a crossing point, is collectively referred to as "aramid nonwoven fabric".
아라미드 단섬유들로 구성된 아라미드 단섬유 부직포는 내열성 및 내약품성이 뛰어나 고온 등의 극한 환경에서 사용되는 필터 소재 등으로 사용된다.The aramid short fiber nonwoven fabric composed of aramid short fibers is excellent in heat resistance and chemical resistance and is used as a filter material used in extreme environments such as high temperature.
아라미드 단섬유 부직포를 제조하는 종래기술로는 미국등록특허 제3,869,428호 등에 기재된 바와 같이 파라페닐렌디아민(방향족 디아민)이 용해되어 있는 유기용매 내에 테레프탈로일디클로라이드(방향족 디에시드 할라이드)를 상기 파라페닐렌디아민과 동일한 몰량(Molar amount)으로 첨가, 중합하여 아라미드 중합체를 제조한 다음, 제조된 아라미드 중합체를 농황산에 녹여 방사용액을 제조한 다음, 제조된 방사용액을 방사구금을 통해 필라멘트상으로 방사, 응고, 수세 및 건조하여 아라미드 필라멘트를 제조한 다음, 제조된 아라미드 필라멘트를 절단하여 아라미드 단섬유(Staple)를 제조한 다음, 상기 아라미드 단섬유들을 카딩기에서 공급, 처리하여 아라미드 단섬유 웹을 제조한 다음, 제조된 상기 아라미드 단섬유 웹을 니들펀칭하여 아라미드 단섬유 부직포를 제조하는 방법이 사용되어 왔다.As a conventional technique for producing aramid short fiber nonwoven fabric, as described in U.S. Patent No. 3,869,428, paraphenylenediamine (aromatic diamine) is dissolved in an organic solvent in which terephthaloyl dichloride (aromatic diecide halide) is paraphenyl. Aramid polymer is prepared by adding and polymerizing in the same molar amount as rendamine, and then dissolving the prepared aramid polymer in concentrated sulfuric acid to prepare a spinning solution, and then spinning the prepared spinning solution into a filament through spinneret, Coagulation, washing and drying to produce aramid filaments, and then cutting the prepared aramid filaments to produce aramid short fibers (Staple), and then supplying and processing the aramid short fibers in a carding machine to produce aramid short fiber webs Next, a method of manufacturing an aramid short fiber nonwoven fabric by needle punching the prepared aramid short fiber web has been used.
상기 종래방법은 아라미드 단섬유 웹을 제조하는 공정이 너무 복잡하여 생산성이 떨어지는 문제점이 있었다.The conventional method has a problem in that the process of manufacturing an aramid short fiber web is too complicated and productivity is reduced.
상기 종래방법을 사용하는 방사용액에는 농황산이 포함되어 생산설비의 부식이 심하게 발생되었고, 농황산의 회수설비도 복잡해지는 문제가 있었다.The spinning solution using the conventional method contained concentrated sulfuric acid, which caused severe corrosion of production facilities, and the recovery facility of concentrated sulfuric acid was also complicated.
그로인해, 상기 종래방법으로는 아라미드 단섬유 부직포를 생산할 수 있으나, 아라미드 장섬유(필라멘트)들이 서로 얽히면서 접착된 스펀본드 타입 또는 멜트브로운 타입의 아라미드 부직포를 제조하기 어려운 문제점이 있었다.Therefore, although the aramid short-fiber nonwoven fabric can be produced by the conventional method, there is a problem in that it is difficult to manufacture aramid nonwoven fabrics of spunbond type or melt blown type in which aramid long fibers (filaments) are entangled with each other.
본 발명의 과제는 아라미드 필라멘트들로 구성되고, 극성을 구비하여 정전 필터용 소재로 적합하고, 상기 아라미드 필라멘트에 크레이터(crater)가 형성되어 비표면적이 증가되기 때문에 각종 필터용 소재로도 유용한 건식 아라미드 부직포를 보다 간소한 공정 및 높은 생산성으로 제조할 수 있는 방법을 제공하는 것이다.The subject of the present invention is composed of aramid filaments, and is suitable as an electrostatic filter material having a polarity, and since a crater is formed on the aramid filament, a specific surface area is increased, and thus a dry aramid useful as a material for various filters. It is to provide a method for manufacturing a non-woven fabric with a simpler process and higher productivity.
이와같은 과제를 달성하기 위해서, 본 발명에서는 -CN기가 치환된 방향족기를 포함하는 아라미드 공중합체가 용해되어 있는 중합용매를 방사구금을 통해 필라멘트 형태로 방사한 후 방사되어 응고 전인 필라멘트들에 공기를 분사하여 상기 필라멘트들을 분산 및 교차시켜 필라멘트 웹을 형성한 다음, 상기 필라멘트 웹(Web)을 고온에서 건식 건조하여 필라멘트내 용매를 제거하여 건식 아라미드 부직포를 제조한다.In order to achieve the above object, in the present invention, a polymerization solvent in which an aramid copolymer containing an aromatic group substituted with -CN is dissolved is spun in a filament form through a spinneret, and then spun to spray air onto filaments before solidification. By dispersing and crossing the filaments to form a filament web, dry drying the filament web at a high temperature to remove the solvent in the filament to produce a dry aramid nonwoven fabric.
본 발명은 농황산에 의한 설비부식 없이도 아라미드 필라멘트들로 구성된 부직포를 제조할 수 있다. 또한 본 발명은 종래 아라미드 단섬유 제조공정과 비교시 공정이 간소화되고, 제조원가가 저렴해지고 생산성도 향상된다.The present invention can produce a nonwoven fabric composed of aramid filaments without corrosion of facilities by concentrated sulfuric acid. In addition, the present invention simplifies the process compared to the conventional aramid short fiber manufacturing process, lowers the manufacturing cost and improves productivity.
본 발명으로 제조된 건식 아라미드 부직포는 이를 구성하는 아라미드 필라멘트가 무기염을 함유하여 극성을 갖기 때문에 미세먼지 제거용 정전 필터 소재로 특히 적합하며, 상기 아라미드 필라멘트에 크레이터(crater)가 형성되어 비표면적이 증가되기 때문에 각종 필터용 소재로도 유용하다.The dry aramid non-woven fabric produced by the present invention is particularly suitable as an electrostatic filter material for removing fine dust because the aramid filaments constituting it have an inorganic salt and have a polarity, and a specific surface area is formed by craters formed on the aramid filaments. As it increases, it is also useful as a material for various filters.
이하, 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail.
본 발명은 먼저, -CN 기를 포함하는 방향족 디아민이 용해되어 있는 유기용매에 테레프탈로일 디클로라이드를 첨가, 반응시켜 -CN기가 치환된 방향족기를 포함하는 아라미드 공중합체가 용해되어 있는 중합용액을 제조한다.In the present invention, terephthaloyl dichloride is first added to an organic solvent in which an aromatic diamine containing a -CN group is dissolved and reacted to prepare a polymerization solution in which an aramid copolymer containing an aromatic group substituted with a -CN group is dissolved. .
구현일례로서, -CN기를 포함하는 방향족 디아민으로 시아노-파라-페닐렌 디아민을 단독으로 유기용매에 용해시킬 수 있다.As an example of implementation, cyano-para-phenylene diamine alone may be dissolved in an organic solvent as an aromatic diamine containing a -CN group.
또 다른 구현일례로서, -CN기를 포함하는 방향족 디아민으로 시아노-파라-페닐렌 디아민과 파라페닐렌 디아민을 1:9~9:1의 몰비로 유기용매에 용해 시킬 수도 있다.As another example of implementation, cyano-para-phenylene diamine and paraphenylene diamine may be dissolved in an organic solvent at a molar ratio of 1:9 to 9:1 as an aromatic diamine containing a -CN group.
구체적으로 먼저, 유기용매에 무기염을 용해시킨 다음 여기에 시아노기(-CN)를 포함하는 방향족 디아민을 첨가하여 용해시킨다.Specifically, first, an inorganic salt is dissolved in an organic solvent, and then an aromatic diamine containing a cyano group (-CN) is added thereto to dissolve it.
이때 사이노기(-CN)를 포함하는 방향족 디아민으로 파라페닐렌디아민과 시아노-파라-페닐렌디아민을 1:9~9:1의 몰비로 용해할 수도 있고, 시아노-파라-페닐렌디아민을 단독으로 용해할 수도 있다.In this case, paraphenylenediamine and cyano-para-phenylenediamine may be dissolved in a molar ratio of 1:9 to 9:1 as an aromatic diamine containing a cyno group (-CN), and cyano-para-phenylenediamine Can be dissolved alone.
상기 유기용매의 구체적인 예로는 N-메틸-2-피롤리돈(NMP), N,N-디메틸아세트아미드(DMAc), 헥사메틸포스포아미드(HMPA), N,N,N',N'-테트라메틸 우레아(TMU), N,N-디메틸포름아미드(DMF), 또는 이들의 혼합물을 들 수 있고, N-메틸-2-피롤리돈(NMP)인 것이 보다 바람직하다.Specific examples of the organic solvent include N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), hexamethylphosphoamide (HMPA), N,N,N',N'- Tetramethyl urea (TMU), N,N-dimethylformamide (DMF), or mixtures thereof, and more preferably N-methyl-2-pyrrolidone (NMP).
상기 무기염은 방향족 폴리아미드의 중합도를 증가시키기 위하여 첨가하는 것으로서, 그 구체적인 예로는 CaCl2, LiCl, NaCl, KCl, LiBr 및 KBr 등과 같은 할로겐화 알칼리 금속염 또는 할로겐화 알칼리 토금속염을 들 수 있다. 이들 무기염은 단독으로 또는 2종 이상의 혼합물의 형태로 첨가될 수 있다. The inorganic salt is added to increase the degree of polymerization of the aromatic polyamide, and specific examples thereof include a halogenated alkali metal salt or a halogenated alkaline earth metal salt such as CaCl 2 , LiCl, NaCl, KCl, LiBr and KBr. These inorganic salts may be added alone or in the form of a mixture of two or more.
상기 무기염의 첨가량은 유기용매 중량 대비 2~5중량% 정도인 것이 바람직하다.It is preferable that the addition amount of the inorganic salt is about 2 to 5% by weight based on the weight of the organic solvent.
다음으로는, 상기와 같이 -CN기를 포함하는 방향족 디아민이 첨가, 용해된 유기용매에 테레프탈로일 디클로라이드를 상기 방향족 디아민 성분과 동일한 몰량(Molar amount)으로 첨가하여 공중합 아라미드 중합체를 포함하는 중합용매를 제조한다.Next, as described above, an aromatic diamine containing a -CN group is added and terephthaloyl dichloride is added to the dissolved organic solvent in the same molar amount as the aromatic diamine component, and a polymerization solvent containing a copolymerized aramid polymer. To prepare.
다음 공정으로는, 상기 중합용액을 방사구금을 통해 필라멘트상으로 방사한 후, 방사되어 응고 전인 필라멘트들에 공기를 분사하여 상기 필라멘트들을 분산 및 교차시켜 필라멘트 웹(Web)을 제조한다.In the next step, the polymerized solution is spun into a filament through a spinneret, and then spun and coagulates the filaments by spraying air on the filaments before coagulation to prepare a filament web.
이때, 방사되어 응고 전인 필라멘트에 공기를 분사함과 동시에 정전기를 부여하여 상기 필라멘트들을 웹(Web) 형태로 분산 및 교차시켜 스펀본드(Spunbond) 타입의 부직포를 제조하거나, 또 다른 구현예로서 방사구금 직하 위치에서 방사되어 응고 전인 필라멘트에 고압의 공기를 분사하여 상기 필라멘트들을 연신시킴과 동시에 웹(Web) 형태로 분산/교차시켜 멜트브로운(Meltbrown) 타입의 부직포를 제조한다.At this time, the spunbond type nonwoven fabric is produced by dispersing and crossing the filaments in the form of a web by simultaneously applying static electricity while simultaneously spraying air to the filament that is spun and solidifying, or as another embodiment, spinneret Melt-brown type non-woven fabric is manufactured by dispensing/crossing the filaments at the same time as stretching the filaments by spraying high-pressure air to the filaments that are spun from the direct position before solidification.
다음 공정으로는, 상기 필라멘트 웹(Web)을 고온에서 건식 건조하여 필라멘트내 용매를 제거하여 본 발명에 따른 건식 아라미드 부직포를 제조한다.In the next step, the dried filament web is dried at a high temperature to remove the solvent in the filament to prepare a dry aramid nonwoven fabric according to the present invention.
이때, 구현일례로서 상기 필라멘트 웹(Web)을 150~300℃의 열풍 건조기 내로 통과시키면서 건조하여 필라멘트 내 용매를 제거한다.At this time, as an example of implementation, the filament web is dried while passing through the hot air dryer at 150 to 300°C to remove the solvent in the filament.
본 발명에서는 상기 필라멘트 웹(Web)을 건식 건조방식으로 처리하여 필라멘트 내에 남아있는 용매를 제거하기 때문에 필라멘트 표면에 다수개의 크레이터(crater)들이 발생되어, 비표면적이 증가되며, 또한 필라멘트 내에 무기염이 그대로 잔존하게 되어 극성을 구비하게 된다.In the present invention, by treating the filament web (dry) in a dry manner to remove the solvent remaining in the filament, a number of craters are generated on the surface of the filament, and the specific surface area is increased. It remains as it is and has a polarity.
본 발명은 농황산에 의한 설비부식 없이도 아라미드 필라멘트들로 구성된 부직포를 제조할 수 있다. 또한 본 발명은 종래 아라미드 단섬유 제조공정과 비교시 공정이 간소화되고, 제조원가가 저렴해지고 생산성도 향상된다.The present invention can produce a nonwoven fabric composed of aramid filaments without corrosion of facilities by concentrated sulfuric acid. In addition, the present invention simplifies the process compared to the conventional aramid short fiber manufacturing process, lowers the manufacturing cost and improves productivity.
본 발명으로 제조된 건식 아라미드 부직포는 이를 구성하는 아라미드 필라멘트가 무기염을 함유하여 극성을 갖기 때문에 미세먼지 제거용 정전 필터 소재로 특히 적합하며, 상기 아라미드 필라멘트에 크레이터(crater)가 형성되어 비표면적이 증가되기 때문에 각종 필터용 소재로도 유용하다.The dry aramid nonwoven fabric produced by the present invention is particularly suitable as an electrostatic filter material for removing fine dust because the aramid filaments constituting it have an inorganic salt and have a polarity, and a specific surface area is formed by craters formed on the aramid filaments. As it increases, it is useful as a material for various filters.
이하, 실시예를 통하여 본 발명을 구체적으로 살펴본다.Hereinafter, the present invention will be described in detail through examples.
그러나, 하기 실시예는 본 발명의 바람직한 구현일례일뿐, 본 발명의 보호범위를 한정하는 것으로 해석되어서는 안된다.However, the following examples are only exemplary embodiments of the present invention and should not be construed as limiting the protection scope of the present invention.
실시예 1Example 1
3중량%의 CaCl2를 포함하는 N-메틸-2-피롤리돈(NMP) 유기용매를 질소 분위기 하에서 반응기 내에 넣고, 파라-페닐렌디아민(p-phenylenediamine) 50 몰%와 시아노-파라-페닐렌디아민(cyano-p-phenylenediamine) 50 몰%를 상기 반응기에 넣고 녹여서 혼합용액을 제조하였다.An N-methyl-2-pyrrolidone (NMP) organic solvent containing 3% by weight of CaCl 2 was placed in a reactor under a nitrogen atmosphere, and 50 mol% of para-phenylenediamine and cyano-para- 50 mol% of phenylenediamine (cyano-p-phenylenediamine) was added to the reactor and dissolved to prepare a mixed solution.
이어서 상기 혼합용액이 담긴 반응기에 테레프탈로일 디클로라이드 100몰%를 첨가하여 공중합 아라미드 중합체를 포함하는 중합용액을 제조하였다.Subsequently, 100 mol% of terephthaloyl dichloride was added to the reactor containing the mixed solution to prepare a polymerization solution comprising a copolymerized aramid polymer.
이어서, 상기 중합용액을 방사구금을 통해 필라멘트 상으로 압출한 후 방사되어 응고 전인 상기 필라멘트들에 공기를 분사하면서 정전기를 부여하여 상기 필라멘트들을 분산 및 교차시켜 필라멘트 웹(Web)을 제조하였다.Subsequently, the polymerized solution was extruded onto a filament through a spinneret and then spun to discharge static electricity while spraying air to the filaments before coagulation to disperse and cross the filaments to prepare a filament web.
상기와 같이 제조된 필라멘트 웹(Web) 내에서 서로 교차하는 필라멘트 간의 교차점에서는 필라멘트들이 본딩(bonding)되어 있었다.In the filament web manufactured as described above, the filaments were bonded at the intersection between the filaments intersecting each other.
다음으로는, 상기와 같이 제조된 웹(Web)을 200℃의 열풍 건조기 내로 통과시켜 필라멘트 내에 남아있는 용매를 제거하여 스펀본드(Spunbond) 타입의 건식 부직포를 제조하였다.Next, the web (Web) prepared as described above was passed through a hot air dryer at 200° C. to remove the solvent remaining in the filament to prepare a spunbond type dry nonwoven fabric.
실시예 2Example 2
3중량%의 CaCl2를 포함하는 N-메틸-2-피롤리돈(NMP) 유기용매를 질소 분위기 하에서 반응기 내에 넣고, 시아노-파라-페닐렌디아민(cyano-p-phenylenediamine) 100 몰%를 상기 반응기에 넣고 녹여서 혼합용액을 제조하였다.An N-methyl-2-pyrrolidone (NMP) organic solvent containing 3% by weight of CaCl 2 was placed in a reactor under a nitrogen atmosphere, and 100 mol% of cyano-p-phenylenediamine was added. It was put in the reactor and melted to prepare a mixed solution.
이어서 상기 혼합용액이 담긴 반응기에 테레프탈로일 디클로라이드 100몰%를 첨가하여 공중합 아라미드 중합체를 포함하는 중합용액을 제조하였다.Subsequently, 100 mol% of terephthaloyl dichloride was added to the reactor containing the mixed solution to prepare a polymerization solution comprising a copolymerized aramid polymer.
이어서, 상기 중합용액을 방사구금을 통해 필라멘트 상으로 압출한 후 방사구금 직하의 위치에서 방사되어 응고 전인 상기 필라멘트들에 공기를 분사하여 상기 필라멘트들을 연신 및 분산시켜 필라멘트 웹(Web)을 제조하였다.Subsequently, the polymerized solution was extruded onto a filament through a spinneret, and then spun at a location directly under the spinneret to spray air on the filaments before solidification to stretch and disperse the filaments to prepare a filament web.
상기와 같이 제조된 필라멘트 웹(Web) 내에서 서로 교차하는 필라멘트 간의 교차점에서는 필라멘트들이 본딩(bonding)되어 있었다.In the filament web manufactured as described above, the filaments were bonded at the intersection between the filaments intersecting each other.
다음으로는, 상기와 같이 제조된 웹(Web)을 180℃의 열풍 건조기 내로 통과시켜 필라멘트들 내에 남아있는 용매를 제거하여 멜트브로운(Meltblown) 타입의 건식 부직포를 제조하였다.Next, a web prepared as described above was passed through a hot air dryer at 180° C. to remove the solvent remaining in the filaments to prepare a meltblown type dry nonwoven fabric.
Claims (8)
(ⅱ) 상기 중합용액을 방사구금을 통해 필라멘트상으로 방사한 후, 방사되어 응고 전인 필라멘트들에 공기를 분사함과 동시에 정전기를 부여하여 상기 필라멘트들을 분산 및 교차시켜 필라멘트 웹(Web)을 제조하거나 혹은 방사되어 응고 전인 필라멘트들에 방사구금 직하 위치에서 공기를 분사하여 상기 필라멘트들을 분산과 동시에 연신시켜 웹을 제조하는 공정;
(ⅲ) 상기 필라멘트 웹(Web)을 고온에서 건식 건조하여 필라멘트내 용매를 제거하는 공정; 을 포함하는 것을 특징으로 하는 정전필터용 건식 아라미드 부직포의 제조방법.(Iii) terephthaloyl dichloride is added to the organic solvent in which the aromatic diamine containing -CN group is dissolved and reacted to prepare a polymerization solution in which an aramid copolymer containing an aromatic group substituted with -CN group is dissolved, and Adding 2 to 5% by weight of an inorganic salt to the polymerization solution based on the weight of the organic solvent;
(Ii) After spinning the polymerization solution into a filament through a spinneret, it is spun and sprays air on the filaments before solidification, and at the same time gives static electricity to disperse and cross the filaments to produce a filament web (Web) or Or a process of producing a web by simultaneously stretching and stretching the filaments by spraying air at a location directly under the spinneret to the filaments that are spun and solidified;
(Iii) drying the filament web at a high temperature to remove the solvent in the filament; Method for producing a dry aramid non-woven fabric for an electrostatic filter comprising a.
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