KR100490515B1 - High-tenacity high-modulus drainage filter and preparation thereof - Google Patents
High-tenacity high-modulus drainage filter and preparation thereof Download PDFInfo
- Publication number
- KR100490515B1 KR100490515B1 KR10-2002-0065108A KR20020065108A KR100490515B1 KR 100490515 B1 KR100490515 B1 KR 100490515B1 KR 20020065108 A KR20020065108 A KR 20020065108A KR 100490515 B1 KR100490515 B1 KR 100490515B1
- Authority
- KR
- South Korea
- Prior art keywords
- filter material
- strength
- fiber
- fibers
- high strength
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
- B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
-
- 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
- D04H1/48—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 in combination with at least one other method of consolidation
- D04H1/485—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 in combination with at least one other method of consolidation in combination with weld-bonding
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/558—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 by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0618—Non-woven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0659—The layers being joined by needling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0668—The layers being joined by heat or melt-bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/04—Filters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Materials (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
본 발명은 고강도 고강성 배수필터재 및 그 제조방법으로서, 기존의 단섬유로 형성된 부직포에 비하여 우수한 인장강도, 인열강도 및 파열강도 등의 기계적 특성과 내화학성을 가지는 장섬유로 형성된 부직포 등의 물성과 동등한 물성을 나타내면서도 장섬유의 카딩시 발생하는 엉킴현상 등이 발생하지 않아 우수한 공정효율을 가지며 제조원가가 저렴할 뿐만 아니라, 초음파봉제시 봉제효과가 우수한 단섬유로 형성된 고강도, 고강성인 배수필터재 및 그 제조방법에 관한 것이다. The present invention is a high-strength, high-stiffness drainage filter material and a method of manufacturing the same, and a non-woven fabric made of long fiber having mechanical properties and chemical resistance, such as excellent tensile strength, tear strength, and bursting strength, compared to a conventional non-woven fabric made of short fibers. High-strength, high-stiffness drainage filter material formed of short fibers that have excellent process efficiency and low manufacturing cost as well as excellent sewing efficiency due to no entanglement that occurs during carding of long fibers while showing the same physical properties. And to a method for producing the same.
Description
본 발명은 연약지반에 사용되는 배수필터재 및 그 제조방법에 관한 것으로서 단섬유로 형성된 고강도 고강성 배수필터재에 관한 것이다. The present invention relates to a drain filter material used in the soft ground and a manufacturing method thereof, and to a high strength high rigid drain filter material formed of short fibers.
연약지반 배수필터재는 골이 파여 있는 플라스틱 코아를 필터재로 감싸 놓은 2층구조로 구성되어 있으며 이를 연약지반 내에 수직으로 설치하면 지반내의 과잉간극수가 삼투압의 작용으로 필터재를 통과하고 내부 플라스틱 코아의 배수구를 통해 상부로 배출하게 된다. 필터재는 연약지반의 압밀과정중에서 합성수지 판체사이로 들어가지 않도록 젖은 상태에서 팽팽한 본래의 강도와 강성을 유지해야 하며, 흙입자에 의한 막힘현상(clogging)이 없으면서 충분한 투수성이 필요하다. The soft ground drainage filter material is composed of a two-layer structure that wraps the corrugated plastic core with the filter material. When it is installed vertically in the soft ground, the excess pore water in the ground passes through the filter material due to the osmotic pressure and the internal plastic core It is discharged upward through the drain. The filter material must maintain its original strength and rigidity in the wet state so as not to enter between the synthetic resin plates during the consolidation process of the soft ground, and sufficient water permeability without clogging caused by soil particles.
종래에는 단섬유에 의한 열융착 부직포 또는 바인더수지가 함유된 부직포등이 사용되어 왔으나 이러한 단섬유 부직포는 강도 및 강성을 포함한 역학특성이나 과대한 기공크기로 인한 흙입자의 막힘현상, 불량한 투수성으로 인해 필터재로는 부적합하여 현재는 사용하지 않고 있다. 따라서 현재는 100% 폴리프로필렌 장섬유 스펀본드 부직포가 필터재로 널리 사용되고 있다. Conventionally, a heat-sealed nonwoven fabric made of short fibers or a nonwoven fabric containing a binder resin has been used, but such a short fiber nonwoven fabric has a mechanical property including strength and rigidity, clogging of soil particles due to excessive pore size, and poor water permeability. Therefore, it is not suitable as a filter material and is not currently used. Therefore, 100% polypropylene long fiber spunbond nonwoven fabric is now widely used as a filter material.
장섬유 필터재의 제조방법으로는 방사된 폴리프로필렌 필라멘트를 가열로울러에 의해 연신하고 코로나 방전장치에 의해 필라멘트를 강제로 대전시켜 웹을 성형한 다음, 캘린더 로울러가 장치된 스팀챔버(steam chamber)내에서 융착시켜 스펀본드 부직포를 제조하는 방법이 있는데, 100% 폴리프로필렌 장섬유 스펀본드 부직포의 특성은 인장강도, 인열강도, 파열강도를 포함한 역학적특성과 내화학적특성, 박테리아와 미생물에 대한 저항성이 우수하다. 또한, 큰 압축력에 대해서도 크리프가 적으며 기공크기도 적절히 조절 가능한 장점을 가지고 있다. 그러나 상기 부직포는 장섬유를 사용하기 때문에 코로나 방전장치가 아닌 일반 카드기의 사용시에는 카드기의 침포에 섬유가 얽혀 웹을 형성할 수가 없으며 최종제품의 가격이 비싼 단점이 있다.In the manufacturing method of the long fiber filter material, the spun polypropylene filament is stretched by a heating roller, the filament is forcibly charged by a corona discharge device, and a web is formed, and then in a steam chamber equipped with a calender roller. There is a method of manufacturing a spunbond nonwoven fabric by fusion bonding. The 100% polypropylene long fiber spunbond nonwoven fabric has excellent mechanical and chemical properties including tensile strength, tear strength, and tear strength, and excellent resistance to bacteria and microorganisms. Do. In addition, there is little creep even for a large compressive force and the pore size can be properly adjusted. However, since the non-woven fabric uses long fibers, when the general card machine is used instead of the corona discharge device, the web is not entangled with fibers in the card cloth, and the end product is expensive.
따라서 본 발명은 상기한 바와 같은 선행기술의 제반 문제점을 해소할 수 있는 단섬유로 형성된 고강도 고강성 배수필터재를 제공하는 것을 기술적 과제로 한다.Therefore, the present invention is to provide a high-strength, high rigidity drain filter material formed of short fibers that can solve all the problems of the prior art as described above.
상기한 과제를 해결하기 위하여 본 발명자는 기존의 장섬유를 사용하지 않고 섬유장이 짧은 합성섬유를 사용하면 원료의 선택폭이 넓어질 뿐만 아니라 일반 카딩기에서도 웹을 효율적으로 제공할 수 있어 공정효율 및 원가절감에 큰 효과를 얻을 수 있으며, 사용되는 섬유의 길이와 크림프수 , 니들펀칭의 펀칭밀도 및 열융착온도를 조절하면 단섬유부직포의 단점을 극복하고 장섬유부직포의 물성과 동등하면서도 보다 높은 밀도를 가진 판상형태의 우수한 물성의 배수필터재를 제조할 수 있다는 것을 알게 되어 본 발명을 완성하게 된 것이다. In order to solve the above problems, the inventors of the present invention use a synthetic fiber having a short fiber length without using the existing long fiber, thereby increasing the selection of raw materials and efficiently providing a web even in a general carding machine. It is possible to obtain a great effect on cost reduction, and by controlling the length of fiber used, the number of crimps, the punching density of the needle punching and the heat fusion temperature, it overcomes the shortcomings of short fiber nonwovens and is higher than the physical properties of long fiber nonwovens. The present invention has been completed by knowing that it is possible to manufacture a drainage filter material having excellent physical properties in the form of a plate.
그러므로 본 발명에 의하면 배수필터재를 제조하는 방법에 있어서, 섬유장 40∼65mm, 크림프수 5∼7개/cm, 섬도 4∼8데니어의 합성섬유를 카딩하고 적층한 후, 상기 적층된 섬유층을 펀칭밀도 200∼500 PPSC로 니들펀칭하고 열융착온도 100∼130℃에서 열융착하는 공정을 포함하는 것을 특징으로 하는 고강도 고강성 배수필터재의 제조방법이 제공된다.Therefore, according to the present invention, in the method for producing a drainage filter material, the laminated fiber layer is formed after carding and laminating synthetic fibers having a fiber length of 40 to 65 mm, a crimp number of 5 to 7 pieces / cm, and a fineness of 4 to 8 deniers. There is provided a method for producing a high strength, high rigidity drainage filter material comprising needle punching at a punching density of 200 to 500 PPSC and thermally fusion at a heat fusion temperature of 100 to 130 ° C.
또한 상기 제조방법에 의하면 단섬유의 합성섬유를 적층, 결합하여 형성된 시트로서 다음의 특성을 포함하는 것을 특징으로 하는 고강도 고강성 배수필터재가 제공된다.In addition, according to the manufacturing method is provided a high-strength, high rigidity drain filter material characterized in that the sheet formed by laminating and bonding the synthetic fibers of the short fibers comprises the following characteristics.
(a)인장강도가 길이방향 950 ∼ 1100, 폭방향 930∼1100 kgf/m, (a) tensile strength in the longitudinal direction of 950 to 1100, in the width direction of 930 to 1100 kgf / m,
(b)초기강성율이 길이방향 4500∼7000, 폭방향 4000∼6000 kgf/㎠, (b) Initial stiffness is 4500 to 7000 in the longitudinal direction, 4000 to 6000 kgf / cm 2 in the width direction,
(c)밀도가 0.5∼0.8g/㎤,(c) the density is 0.5 to 0.8 g / cm 3,
(d)투수계수가 1×10-3 ∼ 9 ×10-3 cm/초 및(d) Permeability coefficient is 1 × 10 −3 to 9 × 10 −3 cm / sec and
(e)유효구멍크기(AOS)가 70∼110 ㎛.(e) Effective hole size (AOS) is 70-110 micrometers.
이하 본 발명을 보다 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail.
본 발명인 고강도 고강성 배수필터재는 섬유장이 짧은 합성섬유를 사용하여 적층하고 결합하여 제조된 것이다. The high strength high rigidity drain filter material of the present invention is manufactured by laminating and bonding using short synthetic fibers.
원료섬유는 매트릭스 섬유와 바인더 섬유로 구분되며 매트릭스섬유는 폴리프로필렌이나 폴리에스테르섬유와 같이 초기 강성율이 높고 범용적으로 사용할 수 있는 섬유가 바람직하다. 바인더섬유는 고강도·고강성의 기능 및 이로 인한 형태안정성을 추구하기 위해서 단일형 열융착섬유보다 복합형 열융착섬유의 선택이 바람직하다. The raw material fibers are classified into matrix fibers and binder fibers, and the matrix fibers are preferably fibers which have high initial stiffness and can be used universally, such as polypropylene or polyester fibers. For the binder fiber, in order to pursue high strength and high rigidity and thereby form stability, it is preferable to select a composite type of heat-sealed fiber rather than a single type of heat-sealed fiber.
본 발명에서 사용되는 매트릭스 섬유는 배수필터재로서 요구되는 투수계수와 유효구멍크기(AOS)를 만족하기 위해서 단섬유의 크림프수와 섬유장 섬유직경을 신중히 선택해야 한다. 단섬유의 크림프수는 5∼7개/cm가 바람직한데 크림프수가 너무 적으면 카딩공정이 불안정하며, 크림프수가 너무 많으면 얻어지는 웹이 벌키(bulky)하고 투수계수와 유효구멍크기가 작게 되고 형태안정성이 좋지 않다. 또한 섬유장(fiber length)은 40∼65mm 정도가 가장 바람직한데 40mm미만의 섬유장을 가진 섬유는 카딩기에서 부유섬유로 거동하여 웹의 불균일현상 및 손실율이 높아지며, 65mm를 초과하는 섬유는 카딩기의 침포사이에 얽히거나 절단되는 현상이 발생하여 카딩공정이 불안정하게 되며 유효구멍크기도 너무 크게되어 투수효과는 높아지나 구멍으로 흙이나 부유물이 침투하여 결국에는 배수작용을 할 수 없게 된다. 본 발명인 배수필터재로 사용하는 단섬유 직경은 4∼6데니어 범위가 바람직 한데 이보다 큰 섬도, 예를 들어 10데니어인 경우는 섬유웹의 균제도가 떨어지고 섬유웹의 표면이 거칠게 되는 단점이 있으며 반대로, 이보다 작은 섬도의 섬유웹은 강도가 부족한 단점이 있다. In order to satisfy the permeability coefficient and effective hole size (AOS) required as the drain filter material, the matrix fiber used in the present invention should carefully select the crimp number and the fiber length of the short fiber. The crimp number of short fibers is preferably 5-7 pieces / cm. If the number of crimps is too small, the carding process is unstable. If the number of crimps is too large, the web obtained is bulky, the coefficient of permeability and the effective hole size are small, and the shape stability Not good. In addition, the fiber length is most preferably about 40 to 65 mm. Fibers having a fiber length of less than 40 mm behave as floating fibers in the carding machine, resulting in high unevenness and loss rate of the web. The carding process becomes unstable due to entanglement or cutting between the needles, and the effective hole size becomes too large, so that the permeation effect is high, but soil or floating matter penetrates into the hole and eventually cannot drain. The short fiber diameter used as the drain filter material of the present invention is preferably in the range of 4 to 6 denier, but larger fineness, for example, 10 denier, has a disadvantage in that the uniformity of the fiber web is reduced and the surface of the fiber web is rough. The smaller fine fiber web has a disadvantage of insufficient strength.
본 발명에서는 상기 준비된 섬유를 배열하여 웹을 형성하는데 그 방법으로는 건식법(aerodynamic method) 뿐만 아니라 일반 카딩기를 사용하여도 섬유웹을 형성할 수 있다.In the present invention, the prepared fibers are arranged to form a web. As a method, a fiber web may be formed using a general carding machine as well as an aerodynamic method.
상기 성형된 섬유웹은 복합웹 결합공정인 니들펀칭공정을 통해 강도를 1차로 향상시키는데 니들펀칭기의 분당 스트록(stroke)은 섬유웹 중량과 제조속도를 고려하여 선택한다. 펀칭밀도는 PPSC(punching per square centimeter) 단위를 적용하는 경우가 많은데 본 발명에서는 섬유웹 중량이 150∼300g/㎡인 경우에서는 200∼500 PPSC 정도가 바람직하다. 섬유웹 중량이 적은 경우는 섬유웹 구성섬유의 절단을 방지하기 위해 펀칭밀도를 적게 하는 것이 바람직하다. 가장 중요한 점은 섬유웹이 펀칭공정을 통해 인장강도를 최대한 향상시킬 수 있도록 펀칭밀도를 선정하는 것이 중요한데 특히 200g/㎡정도에서는 400 PPSC가 바람직하다. 이러한 니들펀칭은 하방향 스트로크(down-stroke), 상방향 스트로크 (up-stroke) 및 양방향 스트로크(double-stroke) 등 어떤 경우를 사용하여도 무방하다. 니들보드의 상하운동거리는 35∼40mm로 정하는 것이 좋은데 이는 단섬유가 약간씩 흩어지는 것을 최대한 방지하여 주기 때문이다. 또한, 예비펀칭을 하는 것도 좋은 방법인데 예비펀칭은 균일한 인장강도를 유지하기 위해서도 필요하다.The molded fibrous web is primarily improved in strength through a needle punching process, which is a composite web bonding process. The stroke per minute of the needle punching machine is selected in consideration of the fiber web weight and manufacturing speed. The punching density is often applied to the PPSC (punching per square centimeter) unit in the present invention is preferably about 200 to 500 PPSC when the fiber web weight is 150 to 300g / ㎡. When the weight of the fiber web is small, it is preferable to reduce the punching density in order to prevent cutting of the fiber web constituent fibers. Most importantly, it is important to select the punching density so that the fibrous web can improve the tensile strength as much as possible through the punching process, especially 400 PPSC at 200g / m2. Such needle punching may be used in any case, such as a down stroke, an up stroke, and a double stroke. The up and down movement distance of the needle board should be set to 35 to 40mm because it prevents the short fibers from being scattered slightly. In addition, preliminary punching is also a good method, which is necessary to maintain uniform tensile strength.
상기 니들펀칭이 끝난 후 섬유웹을 열풍공정이나 열캘린더공정을 통해 바인더섬유와 매트릭스섬유를 융착시켜 2차로 강도와 강성을 보강하게 된다. 현재 범용으로 사용하고 있는 저융점폴리에틸렌테레프탈레이트(LMPET)/폴리에틸렌테레프탈레이트(PET), 폴리에틸렌(PE)/폴리에틸렌테레프탈레이트(PET) 및 폴리에틸렌(PE)/폴리프로필렌(PP) 등은 본발명에서 열캘린더공정의 처리온도를 100∼130℃ 범위에서 선정하는 것이 바람직하다. 열풍공정에서는 섬유에 직접 열을 가하지 않기 때문에 상기 열캘린더공정보다 10℃이상 고온에서 처리하는 것이 바람직하다. 매트릭스섬유로 폴리프로필렌(PP) 섬유를 사용한 경우, 처리온도를 130℃ 이상으로 하면 매트릭스섬유의 열수축이 크게 일어나며 황변현상이 심하게 나타나 필터재 제품 외관이 좋지 못하며, 110℃ 이하에서는 바인더섬유의 융착성이 부족하여 요구되는 인장강도가 떨어지는 단점이 있다. After the needle punching is finished, the fiber web is fused by the binder fiber and the matrix fiber through a hot air process or a hot calendar process, thereby reinforcing the strength and rigidity secondarily. Low melting point polyethylene terephthalate (LMPET) / polyethylene terephthalate (PET), polyethylene (PE) / polyethylene terephthalate (PET) and polyethylene (PE) / polypropylene (PP), etc. currently used in general It is preferable to select the processing temperature of a calendering process in 100-130 degreeC. In the hot air process, heat is not directly applied to the fiber, and therefore, it is preferable to treat the fiber at a temperature higher than 10 ° C. above the heat calendar process. When polypropylene (PP) fiber is used as matrix fiber, when the treatment temperature is over 130 ℃, thermal shrinkage of matrix fiber is greatly occurred and yellowing phenomenon is severe, so the appearance of filter material is not good. There is a disadvantage in that the lack of required tensile strength.
배수필터재는 종이와 같이 두께가 얇아야 하기 때문에 본 발명에서의 열캘린더에서의 상하 로울러간의 닙포인트(nip point) 간격은 0.1∼0.3mm가 바람직하다. 상기 닙포인트 간격은 열풍처리시 일반 로울러에 대한 닙포인트 간격에서도 동일하게 적용된다.Since the drain filter material should be thin like paper, the nip point spacing between the upper and lower rollers in the thermal calendar of the present invention is preferably 0.1 to 0.3 mm. The nip point spacing is equally applied to the nip point spacing for a general roller during hot air treatment.
본 발명에서는 상기와 같은 제조방법에 의하여 다음과 같은 배수필터재를 얻을 수 있다. 배수필터재에 있어서, 단섬유의 합성섬유를 적층, 결합하여 형성된 시트로서 다음의 특성을 포함하는 것을 특징으로 하는 고강도 고강성 배수필터재;In the present invention, it is possible to obtain the following waste filter material by the manufacturing method as described above. A drain filter material comprising: a high strength, high stiffness drain filter material comprising: a sheet formed by stacking and bonding synthetic fibers of short fibers;
(a)인장강도가 길이방향 950 ∼ 1100, 폭방향 930∼1100 kgf/m, (a) tensile strength in the longitudinal direction of 950 to 1100, in the width direction of 930 to 1100 kgf / m,
(b)초기강성율이 길이방향 4500∼7000, 폭방향 4000∼6000 kgf/㎠, (b) Initial stiffness is 4500 to 7000 in the longitudinal direction, 4000 to 6000 kgf / cm 2 in the width direction,
(c)밀도가 0.5∼0.8 g/㎤,(c) the density is 0.5 to 0.8 g / cm 3,
(d)투수계수가 1×10-3 ∼ 9×10 -3cm/초 및(d) Permeability coefficient is 1 × 10 -3 to 9 × 10 -3 cm / sec and
(e)유효구멍크기(AOS)가 70∼110 ㎛.(e) Effective hole size (AOS) is 70-110 micrometers.
연약지반에 사용되는 배수필터재는 두께가 얇아야 하고 연약지반에 타입하는 경우 이에 견딜수 있는 인장강도가 필요하며 연약지반의 압밀과정중에서 합성수지 판재사이로 흙 또는 부유물이 들어가지 않도록 젖은 상태에서도 팽팽한 본래의 강도와 강성을 유지해야 한다. 특히 초기강성율은 커야 이 상태를 그대로 유지할 수 있으며 투수성도 좋기 때문에 배수필터재로서는 이 초기강성율이 중요한 인자이다. 배수필터재의 밀도가 0.5g/㎤미만이 되는 경우에는 압력에 의해 배수재가 파손되어 충분한 배수필터역할을 할 수 없게 된다. 또한 유효구멍크기(AOS)가 110㎛를 초과하는 경우에는 흙입자가 배수필터재를 통과하여 막힘현상이 발생하므로 최대한 작게 하는 것이 바람직하나 웹의 구성상 한계로 인해 70㎛미만의 유효구멍크기(AOS)에서는 투수성이 현저히 떨어지는 단점이 있다. 따라서, 배수필터재는 투수계수를 보유함과 동시에 인장강도가 적어도 800kgf/m이상, 초기강성률이 3,500kgf/㎠이상이 요구되며 필터재의 막힘현상도 없어야 한다.Drainage filter material used in soft ground should be thin and in case of soft ground type, it needs tensile strength to withstand it, and its original strength is tight even when wet so that no soil or floating material enters between synthetic resin plates during the consolidation process of soft ground. And rigidity must be maintained. In particular, the initial stiffness is large enough to maintain this state and the water permeability is good, so this initial stiffness is an important factor for the drain filter material. When the density of the drain filter material is less than 0.5 g / cm 3, the drain material is broken by the pressure, and thus it is impossible to serve as a sufficient drain filter. In addition, when the effective hole size (AOS) exceeds 110㎛, it is preferable to minimize the dust particles as they pass through the drain filter material, so that the smallest possible size is required. AOS) has a disadvantage in that the permeability is significantly lower. Therefore, the drainage filter material must have a permeability coefficient and at least 800kgf / m tensile strength and at least 3,500kgf / cm 2 initial stiffness, and there should be no clogging of the filter material.
이하 다음의 실시예에서는 본 발명인 고강도 고강성 배수필터재를 제조하는 비한정적인 예시를 하고 있다.The following examples are given as non-limiting examples of producing the high strength, high rigidity drain filter material of the present invention.
[실시예 1]Example 1
바인더섬유로는 저융점 폴리에틸렌테레프탈레이트(LMPET)/폴리에틸렌테레프탈레이트(PET)의 복합섬유를 사용하였으며 매트릭스섬유로는 폴리프로필렌(PP)섬유를 사용하여 혼합하였다. 바인더섬유와 매트릭스섬유의 섬도와 섬유장은 6데니어, 64mm이다. 웹성형공정은 건식법(aerodynamic method)에 의한 랜덤웹을 제조하였으며 원료섬유(매트릭스섬유/바인더섬유)의 구성비는 15/85이다. 웹결합공정은 니들펀칭공정과 열융착공정의 복합공정을 사용하였으며 이때 웹중량은 190g/㎡을 선정하였다. 펀칭밀도는 약 400 PPSC이며 열융착공정에서 열캘린더 온도와 권취속도는 각각 110℃와 1.5m/min로 하여 배수필터재를 제조하였다. As binder fibers, low melting polyethylene terephthalate (LMPET) / polyethylene terephthalate (PET) composite fibers were used, and matrix fibers were mixed using polypropylene (PP) fibers. Fineness and fiber length of binder fiber and matrix fiber are 6 denier and 64mm. The web forming process produced a random web by the aerodynamic method and the composition ratio of the raw fiber (matrix fiber / binder fiber) was 15/85. The web bonding process used a combination of a needle punching process and a thermal fusion process. The web weight was 190g / ㎡. The punching density was about 400 PPSC, and the heat filter temperature and winding speed were 110 ° C. and 1.5 m / min, respectively, in the heat fusion process to prepare drainage filter material.
[실시예 2]Example 2
원료섬유(매트릭스섬유/바인더섬유)의 구성비, 웹중량 및 열융착공정을 표1과 같이 변경하는 것을 제외하고는 실시예1의 방법과 동일하게 배수필터재를 제조하였다.A drain filter material was manufactured in the same manner as in Example 1 except for changing the composition ratio, web weight, and heat fusion process of the raw material fibers (matrix fiber / binder fiber) as shown in Table 1.
[비교예][Comparative Example]
용융방사된 폴리프로필렌 필라멘트 장섬유를 가열로울러에 의해 연신하고 코로나 방전장치에 의해 필라멘트를 강제로 대전시켜 웹을 성형한 다음, 캘린더 로울러가 장치된 스팀챔버(steam chamber)내에서 융착시켜 스펀본드 시트를 제조하였다.The spunbonded sheet is formed by stretching the melt-spun polypropylene filament filament with a heating roller and forcibly charging the filament by a corona discharge device to form a web, and then fusion in a steam chamber equipped with a calender roller. Was prepared.
상기 실시예 및 비교예에 의하여 얻어지는 배수필터재의 기계적 특성을 측정하여 표2에 표시하였다.The mechanical properties of the drain filter material obtained by the above Examples and Comparative Examples were measured and shown in Table 2.
이상 설명한 바와 같이 본 발명에 의한 배수재는 고강도 ·고강성이며 얇고 딱딱한 종이와 같은 촉감을 나타내는 시트로서 기존에 사용된 단순 열융착공정 또는 바인더수지에 의해 접착된 단섬유 부직포 필터재와는 다른 새로운 특성을 나타내고 있으며 연약지반 압밀과정중에서 투수효과를 내면서도 합성수지 판재사이로 흙 또는 부유물이 들어가지 않도록 젖은 상태에서도 팽팽한 본래의 강도와 강성을 유지할 수 있으며 제조공정중에서도 웹의 형성이 원활하여 공정효율을 증대시키는 장점이 있다.As described above, the drainage material according to the present invention is a high-strength, high-strength, thin and hard paper-like sheet, and has a new characteristic different from the conventional single fiber nonwoven filter material bonded by a simple heat welding process or a binder resin. It can maintain its original strength and stiffness even when wet, so that soil or suspended matter does not enter between synthetic resin boards while providing a permeability effect during the soft ground consolidation process. There is an advantage.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0065108A KR100490515B1 (en) | 2002-10-24 | 2002-10-24 | High-tenacity high-modulus drainage filter and preparation thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0065108A KR100490515B1 (en) | 2002-10-24 | 2002-10-24 | High-tenacity high-modulus drainage filter and preparation thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20040036774A KR20040036774A (en) | 2004-05-03 |
KR100490515B1 true KR100490515B1 (en) | 2005-05-17 |
Family
ID=37335415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-2002-0065108A KR100490515B1 (en) | 2002-10-24 | 2002-10-24 | High-tenacity high-modulus drainage filter and preparation thereof |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100490515B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100846300B1 (en) | 2005-11-29 | 2008-07-14 | 주식회사 코오롱 | A braid-reinforced composite hollow fiber membrane |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102602839B1 (en) * | 2021-12-09 | 2023-11-15 | 임창희 | Apparatus for Fixing Vegetated Soil Bag |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59141620A (en) * | 1983-02-02 | 1984-08-14 | Kanai Hiroyuki | Manufacture of water supply and draining material for civil engineering works |
JPH08121094A (en) * | 1994-10-27 | 1996-05-14 | Unitika Ltd | Sheet for discharging spring water in tunnel |
KR19980064854A (en) * | 1998-03-05 | 1998-10-07 | 이정우 | Nonwoven fabric with tensile strength and reinforcement method |
JP2000265453A (en) * | 1999-03-19 | 2000-09-26 | Toray Ind Inc | Civil engineering sheet |
JP2001098526A (en) * | 1999-09-30 | 2001-04-10 | Drain Kogyo Kk | Semi-permeable civil engineering sheet and dike reinforcing construction method |
KR20030097575A (en) * | 2002-06-20 | 2003-12-31 | 주식회사 삼양사 | Very durable geotextile after construction and method for preparing the same |
-
2002
- 2002-10-24 KR KR10-2002-0065108A patent/KR100490515B1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59141620A (en) * | 1983-02-02 | 1984-08-14 | Kanai Hiroyuki | Manufacture of water supply and draining material for civil engineering works |
JPH08121094A (en) * | 1994-10-27 | 1996-05-14 | Unitika Ltd | Sheet for discharging spring water in tunnel |
KR19980064854A (en) * | 1998-03-05 | 1998-10-07 | 이정우 | Nonwoven fabric with tensile strength and reinforcement method |
JP2000265453A (en) * | 1999-03-19 | 2000-09-26 | Toray Ind Inc | Civil engineering sheet |
JP2001098526A (en) * | 1999-09-30 | 2001-04-10 | Drain Kogyo Kk | Semi-permeable civil engineering sheet and dike reinforcing construction method |
KR20030097575A (en) * | 2002-06-20 | 2003-12-31 | 주식회사 삼양사 | Very durable geotextile after construction and method for preparing the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100846300B1 (en) | 2005-11-29 | 2008-07-14 | 주식회사 코오롱 | A braid-reinforced composite hollow fiber membrane |
Also Published As
Publication number | Publication date |
---|---|
KR20040036774A (en) | 2004-05-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5600106B2 (en) | Filter cloth for dust collector | |
RU2596099C2 (en) | Method for production of hydraulically bound non-woven material | |
CN107385683B (en) | Non-woven filter medium and preparation method and application thereof | |
US10252201B2 (en) | Multilayer filter medium for filter, method for producing the same, and air filter | |
JP5609334B2 (en) | Spunbond nonwoven fabric and filter using the same | |
JP5607748B2 (en) | Multilayer filter media and filters | |
EP2142693B1 (en) | Needlepunched nanoweb structures | |
KR19990071608A (en) | High precision filter | |
JP4623833B2 (en) | Tufted carpet | |
US5336556A (en) | Heat resistant nonwoven fabric and process for producing same | |
US6539596B1 (en) | Nonwovens from polytrimethylene terephthalate based staple fibers | |
KR101252341B1 (en) | Polypropylene needle-punching non-woven fabric for an oil-absorber having excellent mechanical strength and manufacturing method thereof | |
KR100490515B1 (en) | High-tenacity high-modulus drainage filter and preparation thereof | |
JPWO2006011453A1 (en) | Solid knitted fabric, core material and laminate | |
KR100477859B1 (en) | Membrane Support of Polyester Nonwoven Fabric | |
JP4026279B2 (en) | Split type composite fiber and fiber molded body using the same | |
US11090901B2 (en) | Multilayer sheet structure | |
KR20070031414A (en) | Three-Dimensional Knit Fabric, Interlining Material and Complex Fabric | |
CN112680882B (en) | Manufacturing method of high-precision vertical filter felt | |
US20210086116A1 (en) | High burst strength wet-laid nonwoven filtration media and process for producing same | |
JPH08109567A (en) | Laminated nonwoven structure and its production | |
JPS6322187Y2 (en) | ||
KR20040012353A (en) | Hybrid nonwoven fabric and method for preparing the same | |
JPH08172946A (en) | Water supply sheet | |
CS213168B1 (en) | Highly effective stabbed textile for filtration of liquids |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20110512 Year of fee payment: 9 |
|
FPAY | Annual fee payment |
Payment date: 20140421 Year of fee payment: 10 |
|
FPAY | Annual fee payment |
Payment date: 20150422 Year of fee payment: 11 |