KR19990080174A - Manufacturing method of precision filtration material - Google Patents

Manufacturing method of precision filtration material Download PDF

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Publication number
KR19990080174A
KR19990080174A KR1019980013237A KR19980013237A KR19990080174A KR 19990080174 A KR19990080174 A KR 19990080174A KR 1019980013237 A KR1019980013237 A KR 1019980013237A KR 19980013237 A KR19980013237 A KR 19980013237A KR 19990080174 A KR19990080174 A KR 19990080174A
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polyurethane foam
synthetic resin
resin
particles
filter medium
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KR1019980013237A
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Korean (ko)
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KR100271028B1 (en
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박순일
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박순일
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    • 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
    • B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
    • B01D39/1653—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin
    • B01D39/1661—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin sintered or bonded
    • 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
    • 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
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

본 발명은 발포 방법으로 제조된 다수의 견속기포를 갖는 스폰지(sponge)형 망상수지(網狀樹脂), 예를들면 연속기포를 갖는 셀룰라폴리우레탄폼(Cellular polyurethane foam)과 같은 발포수지를 소결형틀내에 미리 장입하여 폴리우레탄폼 중의 폴리우레탄 발포체의 수지 부분이 골격(骨格)을 유지하도록 하고 폴리우레탄폼의 기포 부분에 분말상 합성수지 입자가 고르게 충진되도록 하여 소결온도로 가열, 소결시켜 기공의 크기와 분포도와 균일하게 유지되도록 하는 합성수지 여과재의 제조방법에 관한 것이다.The present invention relates to a sintered mold of a foamed resin such as a sponge-type reticulated resin having a plurality of rigid bubbles, for example, a cellular polyurethane foam having a continuous bubble, prepared by the foaming method. The resin portion of the polyurethane foam in the polyurethane foam is preloaded in the inside to maintain the skeleton, and the bubble portion of the polyurethane foam is evenly filled with powdered synthetic resin particles. It relates to a method for producing a synthetic resin filter medium to be maintained uniformly with.

폴리우레탄 발포체의 수지 부분을 소결 성형시 충진입자의 압력 분산용 골격으로 이용하여 소결하여 주게되면 충진되는 입자들의 충진압력이 분산되게 되어 성형 충진체 전체가 고른 압력을 받게되므로 그러한 상태에서 소결시킨 여과체는 공극의 크기면에서나 밀도면에서 균일성을 띠게된다.When the resin part of the polyurethane foam is sintered using the pressure dispersion skeleton of the packed particles during sintering molding, the filling pressure of the filled particles is dispersed, so that the entire molding filler is subjected to an even pressure. The sieve is uniform in size and density.

Description

정밀여과재의 제조방법Manufacturing method of precision filtration material

본 발명은 분말상 합성수지를 이용하는 정밀여과재(精密濾過材)의 제조방법에 관한 것이다.The present invention relates to a method for producing a fine filter material using a powdered synthetic resin.

서로 다른 물질이 함유되어 있는 기체나 액체를 기공(氣孔)을 갖는 격벽(隔壁)에 통과시켜 액체나 기체 중에 현탁되어 있는 서로 다른 물질들의 입자를 효과적으로 분리하는 방법을 여과(filtration)이라 하는데 이때 기공을 갖는 분리 격벽으로 사용되는 물질을 여과재라 하며 공업적으로 많이 이용되고 있는 여과재로서는 그 재질에 따라 여과지(filter paper), 여과포(filter cloth), 세라믹필터(ceramic filter) 등 다양한 종류가 있는데 본 발명은 합성수지로 된 여과재의 제조방법에 관한 것이다.Filtration is a method of effectively separating particles of different substances suspended in a liquid or gas by passing a gas or liquid containing different substances through a partition wall having pores. The material used as the separating partition having a filter material is a filter material, which is widely used industrially, there are various kinds of filter paper, filter cloth, ceramic filter, etc. according to the material. Relates to a method for producing a filter medium made of synthetic resin.

여과재들은 분리해 주고저 하는 물질이나 용도에 따라 그 기공이 크기와 분포의 균일성이 요구되는 바 일반적으로 균일한 미세기공이 균일하게 분포된 여과재를 정밀여과재라 하고 이러한 정밀여과재(microfilter)를 이용하는 여과를 정밀여과(microfilteration)라 한다.Filters are required to be separated according to the material or purpose to which the pores require uniformity of size and distribution. Generally, a filter medium with uniformly uniform micropores is called a microfiltration filter. Filtration is called microfilteration.

최근 산업이 다양화 되어 감에 따라 정밀여과재의 수요도 점차 증가되어 가고 있으며 대표적인 용도로서는 생물학적 청정실(bio-clean room) 등의 청정실(clean room), 정수기(精水器) 유류정제, 과일류, 술등의 음료정제, 환경폐수의 정수설비 및 산소공급용 공기필터 등에 많이 이용되고 있다.As the industry diversifies in recent years, the demand for precision filtration materials is gradually increasing. Typical uses include clean rooms such as bio-clean rooms, water purifiers, oil refineries, fruits, It is widely used for beverage refining such as alcohol, water purification equipment for environmental wastewater, and air filter for oxygen supply.

여과재를 여과공정에 적용함에 있어서 여과재의 품질 기준은 용도에 따른 소재(素材)의 선택도 중요하지만 일반적으로 기공의 크기와 기공 크기의 균일정도 및 기공분포도의 균일정도에 따라 좌우된다.In applying the filter medium to the filtration process, the quality criteria of the filter medium is also important to the selection of materials according to the use, but generally depends on the pore size, pore size uniformity and pore distribution uniformity.

세라믹 필터(재질이 세라믹인 필터) 또는 합성수지 필터는 일반적으로 미세입자의 분말상 세라믹 또는 합성수지를 일정형틀 내에서 가열하여 소결시키는 방법으로 제조된다.Ceramic filters (filters made of ceramic material) or synthetic resin filters are generally manufactured by sintering by heating powder ceramic or synthetic resin of fine particles in a mold.

본 발명은 균일한 크기의 미세가공이 균일하게 분포된 합성수지 여과재의 제조방법에 관한 것이다.The present invention relates to a method for producing a synthetic resin filter medium in which fine processing of uniform size is uniformly distributed.

합성수지 여과재는 분말상 수지를 일정형틀 내에서 합성수지의 연화온도(Softning point)로 가열, 소결(燒結:sintering)되도록 하여 분말상 수지입자의 접촉면에서만 부분적으로 융착이 일어나도록 하고 그 밖에 융착이 일어나지 않는 부분은 공극(연속기공)으로 유지되도록 하여 이 공극사이로 여과시키고저 하는 액체나 기체가 통과되도록 하는 제조방법이 이용되고 있다.Synthetic resin filter media allows powdered resin to be heated and sintered at a softening point of the synthetic resin within a mold to allow partial fusion to occur only at the contact surface of the powdered resin particles. A manufacturing method has been used in which a liquid or gas that passes through the voids is allowed to be held by the voids (continuous pores) and filtered.

이러한 방법으로 제조된 여과재는 공극(空隙)의 분포를 균일하게 유지할 수 없다는 문제가 따른다.The filter medium produced in this way has a problem that the distribution of voids cannot be maintained uniformly.

소결 형틀내에 합성수지 분말을 일정한 진동을 주면서 충진시키게 되면 형틀내에 충진된 합성수지 충진체는 상층부와 하층부 및 외측과 내측에서 받는 압력이 각각 다르게 되고 이에따라 위치별로 밀도가 다르게 되어 합성수지 입자들의 분포도를 균일하게 유지시켜줄 수가 없다. 따라서 이러한 밀도와 분포도가 불균일한 상태에서 소결시켜 주게 되면 여과재의 기공의 크기와 분포도도 균일하게 유지될 수 없게 된다.When the synthetic resin powder is filled in the sintering mold with constant vibration, the synthetic resin fillers filled in the mold have different pressures in the upper layer, the lower layer, and the outer and inner sides, and accordingly, the density is different for each position, thereby maintaining a uniform distribution of the synthetic resin particles. I can't let you. Therefore, if the density and distribution are sintered in a non-uniform state, the size and distribution of the pores of the filter medium also cannot be maintained uniformly.

왜냐하면, 상층부보다는 하층부가, 내측보다는 외측이 높은 밀도를 갖게 되므로 상하층과 내외측의 셀(기공)의 크기와 분포도가 당연히 다르게 되며 하층과 외측이 조밀하고 더 작은 기공을 갖게 된다.Because the lower layer rather than the upper layer has a higher density than the inner side, the size and distribution of the upper and lower layers and the inner and outer cells (pores) are naturally different, and the lower layer and the outer side have dense and smaller pores.

이러한 여과재를 여과막으로 사용하게 되면 여과효율이 떨어지게 되는 단점이 따르게 된다.If such a filter medium is used as the filtration membrane, there is a disadvantage that the filtration efficiency is lowered.

본 발명은 합성수지 입자를 소결틀 내에서 소결시켜 여과재를 제조하는 방법에 있어서, 합성수지 입자가 소결틀 내에서 상층과 하층, 내측과 외측이 모두 균일한 압력을 받게하여 주므로서 기공(여과셀)의 크기와 분포도가 균일하게 유지되록 하는 합성수지 여과재의 제조방법을 제공하고저 하는 것이다.The present invention relates to a method of manufacturing a filter medium by sintering a synthetic resin particle in a sintering mold, wherein the synthetic resin particles are subjected to uniform pressure in both the upper layer and the lower layer, and the inner and outer sides of the pores (filtration cells) in the sintering mold. It is to provide a method for producing a synthetic resin filter medium to maintain a uniform size and distribution.

도면은 본 발명의 여과재의 제조공정도이다.The figure is a manufacturing process drawing of the filter medium of this invention.

본 발명은 발포 성형 방법으로 제조된 다수의 연속기포를 갖는 스폰지(sponge)형 망상수지(網狀樹脂), 예를들면 연속기포를 갖는 셀룰라폴리우레탄폼(Cellular polyurethane foam)과 같은 발포수지를 소결형틀내에 미리 장입하여 폴리우레탄폼 중의 폴리우레탄 발포체의 수지 부분이 골격(骨格)을 유지하도록 하고 폴리우레탄폼의 기포 부분에 분말상 합성수지 입자가 고르게 충진되도록 하여 소결온도로 가열, 소결시켜 기공의 크기와 분포도가 균일하게 유지되도록 하는 합성수지 여과재의 제조방법에 관한 것이다.The present invention sinters a foamed resin such as a sponge-type reticulated resin having a plurality of continuous bubbles produced by a foam molding method, for example, a cellular polyurethane foam having a continuous bubble. It is pre-loaded into the mold to maintain the resin part of the polyurethane foam in the polyurethane foam and the powdered synthetic resin particles are evenly filled in the bubble part of the polyurethane foam, and then heated and sintered at the sintering temperature to achieve the pore size and The present invention relates to a method for producing a synthetic resin filter medium to maintain a uniform distribution.

폴리우레탄 발포체를 사용하지 않고 합성수지 입자를 성형틀내에 충진시키게 되면 충진층 하부는 상층충진물의 가압작용으로 상층보다 큰 압력을 받게 되며 상층으로부터 하층 방향으로 작용하는 가압작용은 하층부가 차단되어 있는 관계로 하층방향으로 작용하는 압력은 결국 측면으로 작용하게 되므로 상층부보다는 하층부가, 중심부보다는 측면부가 더 큰 압력을 받게되며 압력이 클수록 합성수지 충진체의 밀도가 커져서 성형후 기공의 크기가 작게 되며 분산도도 밀집되게 되어 전체로서는 기공의 크기와 분산도가 불균일하게 될 수 밖에 없다.When the synthetic resin particles are filled in the mold without using polyurethane foam, the lower part of the filling layer receives a greater pressure than the upper layer due to the pressurizing action of the upper filling, and the pressing action acting in the direction from the upper layer to the lower layer is blocked. Since the pressure acting in the lower layer direction acts laterally, the lower layer than the upper layer and the side portion are more pressured than the center portion, and the greater the pressure, the greater the density of the resin filler and the smaller the pore size and the degree of dispersion. As a result, the size and dispersion of the pores are inevitably nonuniform as a whole.

그러나 본 발명에서와 같이 폴리우레탄 발포체의 수지부분이 소결 성형시 충진 입자의 압력 분산용 골격으로 활용되므로 이러한 상태에서 소결하여 주게 되면 충진되는 입자들의 충진압력이 분산되게 되어 성형 충진체 전체가 고른 압력을 받게되므로 그러한 상태에서 소결시킨 여과체는 공극의 크기면에서나 밀도면에서 균일성을 띠게되어 소정의 효과를 달성할 수 있게 된다.However, as in the present invention, since the resin portion of the polyurethane foam is used as a pressure dispersion framework for filling particles during sintering molding, when the sintering is performed in such a state, the filling pressure of the filled particles is dispersed so that the entire molding filler is uniformly pressured. Since the filter medium sintered in such a state is uniform in terms of the size and density of the pores, it is possible to achieve a predetermined effect.

이하 본 발명의 내용을 구체적으로 나타내기 위하여 실시예를 들어 설명한다.Hereinafter, the present invention will be described with reference to Examples.

본 발명의 방법에서 이용될 수 있는 수지로서는 분자량 250∼400만의 초고중합폴리에틸렌(Ultrahigh molecular polyethylene), 분자량 25∼35만의 고밀도 폴리에틸렌, 나이론수지, 폴리카보네이트수지가 이용될 수 있으며 합성수지 입자의 입도의 크기에 따라 연속기공의 구경이 0.2∼10㎛ 범위의 여과재를 제조할 수 있다.As the resin that can be used in the method of the present invention, ultrahigh molecular polyethylene (Ultrahigh molecular polyethylene), high density polyethylene of 25 to 350,000 molecular weight, nylon resin, polycarbonate resin can be used and the size of the particle size of synthetic resin particles Depending on the size of the continuous pores can be produced a filter medium of 0.2 to 10㎛ range.

이때 여과재의 평균 공극의 크기는 합성수지 입자의 평균 크기와 충진시 진동정도에 따라 결정되며 여과재의 강도 또한 진동 정도에 따라 결정된다.In this case, the average pore size of the filter medium is determined according to the average size of the synthetic resin particles and the degree of vibration during filling, and the strength of the filter medium is also determined by the degree of vibration.

실시예 1.Example 1.

cm당 4∼10개 정도의 연속기포(連續器泡)를 갖는 셀룰라폴리우레탄발포체(1)를 소결통(2)내에 장입시키기 알맞게 재단하여 소결통 내에 장입한다. 그 위에 분자량 350만이고 평균입자 크기가 10㎛인 폴리에틸렌 수지분말(독일 획스트사 제품 상품명 GUR 212, 연화점 220℃) 소결통에 약간의 진동(300회/분)을 주면서 고르게 분산되도록 충진시킨다.The cellular polyurethane foamed body 1 having about 4 to 10 continuous bubbles per cm is cut into a sintering cylinder 2 so as to fit in the sintering cylinder 2. On top of that, a polyethylene resin powder having a molecular weight of 3.5 million and an average particle size of 10 μm (GUR 212, a product of Gestst, Germany, softening point 220 ° C.) was filled in a sintering tank to be dispersed evenly with slight vibration (300 times / minute).

폴리에틸렌 입자가 폴리우레탄 발포체의 연속 기공중에 고르게 분산되어 충진되어 있는 상태에서 소결통을 오븐(oven)에 넣고 200∼250℃에서 3시간 가열 소결한다. 폴리에틸렌 입자가 분산된 상태에서 소결을 완료하고 냉각, 인출후 필요한 용도에 따라 원통형 또는 쉬트상으로 재단하면 원하는 형태의 여과재를 얻을 수 있다. 이렇게 얻어진 연속기공의 평균구경은 10㎛정도이었다.In the state where the polyethylene particles are uniformly dispersed and filled in the continuous pores of the polyurethane foam, the sintering cylinder is placed in an oven and heated and sintered at 200 to 250 ° C. for 3 hours. After the sintering is completed in the dispersed state of the polyethylene particles, and cooled or taken out, cutting into a cylindrical or sheet shape depending on the required use can provide a filter material of a desired shape. The average diameter of the continuous pores thus obtained was about 10 mu m.

실시예 2.Example 2.

연속기공의 크기가 cm당 4∼10 정도인 다공성 폴리우레탄폼을 사용하고 소결시키고저 하는 수지는 분자량 30만, 평균입도 70메쉬의 고밀도 폴리에틸렌을 사용하였다. 이때 소결조건은 온도 130∼170℃였으며 약 3시간 정도 소결하였다.As a resin using a porous polyurethane foam having a continuous pore size of about 4 to 10 per cm and sintering, a high-density polyethylene having a molecular weight of 300,000 and an average particle size of 70 mesh was used. At this time, the sintering temperature was 130 ~ 170 ℃ and sintered about 3 hours.

이와같이 제조된 여과재는 균일하게 분포된 미세한 셀을 갖고 있으므로 정수, 공기정화(Clean room 및 bio-clean room용), 우유등 음료수의 정제, 유/수(油/水)분리, 폐수처리장치, 공기주입장치 등의 여과재로 사용될 수 있다.The filter media prepared in this way have fine cells evenly distributed so that water purification, air purification (for clean room and bio-clean room), purification of beverages such as milk, separation of oil / water, wastewater treatment device, air It can be used as a filter medium of the injection device.

본 발명의 방법은 분말소결 방법으로는 제조할 수 없었던 "균일한 크기의 미세기공을 균일하게 분포시킨 여과재"의 제조가 가능하게 되었다는 효과가 있을 뿐아니라 합성수지 입자들의 부분 융착에 의한 연속기포구조와 골격유지용으로 사용된 발포폴리우레탄이 갖는 연속기포구조의 2중 구조를 갖고 있어 유연성과 강도가 우수하여 여과재를 발포폴리우레탄폼이 없이 합성수지 입자들만으로 성형시킨 것은 쉽게 균열을 일으켜 평판(平板)으로 스카이빙(skiving)할 때 일정두께 이하로 얇게 스카이빙하는 것이 곤란하였으나 본 발명의 제품은 큰 단성과 인장력이 큰 폴리우레탄폼과 함께 2중의 구조로 되어 있어 얇게 스카이빙 하기가 훨씬 좋으며 원하는 형태로 가공시 가공성이 우수하다는 효과가 있다.The method of the present invention has the effect of being able to produce a "filter material with uniformly distributed micropores of uniform size," which could not be produced by the powder sintering method, as well as a continuous bubble structure by partial fusion of synthetic resin particles It has a double structure of continuous foam structure of foamed polyurethane used for skeletal maintenance. It is excellent in flexibility and strength. It is easy to crack the filter media by molding only synthetic resin particles without foamed polyurethane foam. It was difficult to skive thinly below a certain thickness when skiving, but the product of the present invention has a double structure with polyurethane foam having a large stiffness and a high tensile force. When processing, there is an effect that the workability is excellent.

Claims (2)

분말상 합성수지 입자를 소결형틀에 충진시키고 합성수지의 융착온도로 가열, 합성수지 입자가 소결되도록 하여 여과재를 제조하는 방법에 있어서, 소결형틀내에 연속기포를 갖는 셀룰라폴리우레탄 발포체를 미리 장입하고, 상기 폴리우레탄 발포체의 공극 부분에 합성수지 입자가 균일하게 충진되도록 한 후 가열 소결하여 정밀여과재를 제조하는 방법.A method of manufacturing a filter medium by filling powdered synthetic resin particles in a sintered mold, heating the fusion temperature of the synthetic resin, and sintering the synthetic resin particles, wherein the cellular polyurethane foam having continuous bubbles is pre-loaded in the sintered mold, and the polyurethane foam Method of preparing a fine filter material by heating and sintering the synthetic resin particles uniformly filled in the void portion of the. 제1항에 있어서, 다공성 폴리우레탄 발포체의 공극의 크기가 cm당 4∼10개 정도인 것이고 합성수지가 분자량 25만∼400만의 폴리에틸렌인 방법.The method according to claim 1, wherein the pore size of the porous polyurethane foam is about 4 to 10 per cm and the synthetic resin is a polyethylene having a molecular weight of 250,000 to 4 million.
KR1019980013237A 1998-04-14 1998-04-14 Manufacturing method of microfiltering material KR100271028B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006062294A1 (en) * 2004-11-29 2006-06-15 Kaya Ama Inc. Method for producing filter used in gas generating apparatus of car airbag
CN100436203C (en) * 2004-11-29 2008-11-26 伽倻尖端素材技术株式会社 Method for producing filter used in gas generating apparatus of car airbag
CN109331563A (en) * 2018-09-17 2019-02-15 贵州火焰山电器股份有限公司 A kind of air purifier active carbon filter screen
KR102592356B1 (en) * 2022-12-20 2023-10-20 (주) 디아이엔바이로 Porous plate filter with irregular pore structure that is easy to block larvae and its manufacturing method
KR102687752B1 (en) * 2023-08-09 2024-07-23 (주) 디아이엔바이로 Carbon-reducing porous filter media support plates for lower catchment and manufacturing methods the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407996B1 (en) * 1989-07-12 1994-12-14 Teijin Limited Process for the production of composite molded articles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006062294A1 (en) * 2004-11-29 2006-06-15 Kaya Ama Inc. Method for producing filter used in gas generating apparatus of car airbag
CN100436203C (en) * 2004-11-29 2008-11-26 伽倻尖端素材技术株式会社 Method for producing filter used in gas generating apparatus of car airbag
CN109331563A (en) * 2018-09-17 2019-02-15 贵州火焰山电器股份有限公司 A kind of air purifier active carbon filter screen
KR102592356B1 (en) * 2022-12-20 2023-10-20 (주) 디아이엔바이로 Porous plate filter with irregular pore structure that is easy to block larvae and its manufacturing method
KR102687752B1 (en) * 2023-08-09 2024-07-23 (주) 디아이엔바이로 Carbon-reducing porous filter media support plates for lower catchment and manufacturing methods the same

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