CN103205014A - Polypropylene foamed filtering ball for filtration and preparation method thereof - Google Patents
Polypropylene foamed filtering ball for filtration and preparation method thereof Download PDFInfo
- Publication number
- CN103205014A CN103205014A CN2013101293378A CN201310129337A CN103205014A CN 103205014 A CN103205014 A CN 103205014A CN 2013101293378 A CN2013101293378 A CN 2013101293378A CN 201310129337 A CN201310129337 A CN 201310129337A CN 103205014 A CN103205014 A CN 103205014A
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- Prior art keywords
- polypropylene
- filtration
- preparation
- forcing machine
- filter pearl
- 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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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 56
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 56
- -1 Polypropylene Polymers 0.000 title claims abstract description 53
- 238000001914 filtration Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000005187 foaming Methods 0.000 claims description 15
- 235000011089 carbon dioxide Nutrition 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 4
- 239000001569 carbon dioxide Substances 0.000 abstract 4
- 239000002667 nucleating agent Substances 0.000 abstract 2
- 239000004088 foaming agent Substances 0.000 abstract 1
- 239000002861 polymer material Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 description 30
- 239000011049 pearl Substances 0.000 description 23
- 238000000746 purification Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229920000620 organic polymer Polymers 0.000 description 7
- 239000010865 sewage Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000013618 particulate matter Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010000269 abscess Diseases 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention belongs to the field of high polymer material or filtration technology, and relates to a preparation method of polypropylene foamed filtering ball for filtration. The polypropylene foamed filtering ball for filtration is prepared by the following steps of: selecting polypropylene as a base material; using supercritical carbon dioxide as a foaming agent; installing a foamed filtering ball handpiece on a supercritical carbon dioxide/polypropylene foamed extruder; adding polypropylene and a nucleating agent, and mixing with the extruder injecting carbon dioxide; preparing carbon dioxide, polypropylene and nucleating agent into uniform solution under mixing and plastifying of an upper extruder and a lower extruder; extruding after being stabilized, thus obtaining a polypropylene foamed tube which has aperture ratio on side wall being more than 90%, a through hole in the centre, full of pores in the side wall and is used for filtration; and cooling by an air natural cooling or wind cooling device and dicing by a special dicing cutter to obtain the polypropylene foamed filtering ball for filtration. The preparation method has the advantages that the prepared product has high temperature resistance, washing resistance, low plugging ratio and long service life, and is applied to the filter material under the low and high temperature.
Description
Technical field
The invention belongs to macromolecular material or filtration art, refer in particular to a kind of filtration with polypropylene expanded filter pearl and preparation method thereof.
Background technology
Along with industrial expansion, the pollution of atmosphere and water resources is more and more serious, causes resource more and more deficienter.In order to alleviate environmental pollution, must after meeting discharging standards behind the filtration, purification, could discharge for contaminated empty G﹠W.The pollutent of some industrial enterprises and sanitary sewage all must be handled by filtration, purification.In the filtration, purification treatment process, what processing power and operating performance were played a crucial role is exactly filtrate.The filtrate that is used for the filtration, purification treatment process can be divided into inorganic filtrate and organic polymer filtrate; According to filtrate density difference, can be divided into floating filtrate and sinking filtrate; Inorganic filtrate is generally the sinking filtrate, and the organic polymer filtrate is generally the floating filtrate.Common inorganic filtrate has haydite, coke, quartz sand, gac and expansion silico-aluminate etc., and the organic polymer filtrate has polystyrene, polyvinyl chloride, polyethylene and polypropylene and some foaming filter pearls etc.
In sewage treatment process, mainly contain filtration, purification and three kinds of technologies of BAF.In these three kinds of technologies, filter with the employed filtrate of purification process and mainly use open cell porous material, rely on open porous filter and purify waste water in suspended substance or small-particle, wherein, inorganic filtrate has, porous ceramic grain, coke, gac and expansion silico-aluminate; Organic filtrate mainly contains open cell type foaming filter pearl.Biological aerated filter process is mainly used in secondary or the three grades of water technologies, and inorganic filtrate and organic polymer filtrate commonly used all can use.
In atmospheric treatment technology, mainly be to filter and purification process.In order to remove contaminated airborne dust or particulate matter, selected filtrate is the open cell type porous material.Under the effect of pressure, air is when the open cell type porous material, and the hole of material can be adsorbed in very little particulate matter in material surface and the hole and play the effect that purifies air.Therefore, used porous material generally must be poromerics and be open cell type, particularly to the filtration of the particulate matter of PM2.5 with purify more obvious.Present employed filtrate mainly contains, and the macromolecule foaming filter pearl in the gac in the inorganic filtrate and the organic filtrate mainly is EPS foaming filter pearl.
At present, in purifying, sewage disposal and air filtration has a lot of shortcomings in the selected material.Inorganic filtrate belongs to the sinking filtrate, very easily produces wearing and tearing under flushing and pressure effect, so the life-span is shorter, generally in 2～3 years.In addition, though the porous material in the inorganic filtrate is the perforate material,, generally with the sintering process preparation, thereby cause abscess bigger, range of application is very limited.Inorganic filtrate is difficult for reclaiming, and easily environment is caused secondary pollution in process for processing and in using.
What the use at present of organic polymer filtrate was more is EPS foaming filter pearl, the extruded material with holes that does not foam and hollow obturator-type expanded polypropylene.Because technology and material, EPS foaming filter pearl is generally pure obturator-type structure, and the fusing point of EPS is lower, and only 80 ℃ of general heatproofs are also lower than the boiling point of water, can't be used for the occasion of high temperature.Owing to belong to the obturator-type structure, filter with purification process in operational efficiency low and cost is relative very high.The use of the extruded material with holes that does not foam and hollow obturator-type expanded polypropylene also can be limited greatly, because production technique, the hole all is very large, generally more than 1mm, also can't be used for whole technologies that sewage disposal and air filtration purify fully.
An important indicator weighing the media performance in sewage disposal and the air filtration purification is specific surface area, present organic polymer filtrate or be the obturator-type structured material, be to make the hollow type structure in order to increase specific surface area, but the increase of its specific surface area is all not as pure open cell type foam material.Present organic polymer filtrate is compared with the inorganic filtrate of multi-hole type, and its specific surface area is littler.
Summary of the invention
The filtration that the purpose of this invention is to provide a kind of hollow opening pass is with polypropylene expanded filter pearl and preparation method thereof.
The object of the present invention is achieved like this:
Filter the preparation method with polypropylene expanded filter pearl; select for use heatproof o'clock more than 130 ℃; fusing point is base-material at the polypropylene more than 150 ℃; with supercritical co as whipping agent; at supercritical co/polypropylene expanded forcing machine the polypropylene expanded filter pearl head of hollow opening pass is installed; add polypropylene; nucleator is after forcing machine is mixing; inject a certain amount of carbonic acid gas; then in last rank forcing machine and the mixing of rank forcing machine down; plasticate down; with carbonic acid gas; polypropylene and nucleator raw material form uniform solution; the technological temperature of the last rank forcing machine of this moment is set at and is higher than 25～35 ℃ of polypropylene fusing points; gas injection section temperature is higher than 15～30 ℃ of the technological temperatures of rank forcing machine; the technological temperature of following rank forcing machine and extruder head temperature are set at and are higher than 10～15 ℃ of selected polypropylene fusing points; after treating stable extruding; can obtain the side-wall hole rate more than 90%; there is a through hole centre; sidewall is covered with the polypropylene expanded pipe of filtration of micropore; after air naturally cooling or air cooling equipment cooling, can prepare the polypropylene expanded filter pearl of filtering usefulness with special-purpose dicing machine pelletizing.
The outline of above-mentioned foaming filter pearl is the figure that circle or ellipse or Polygons or line segment and camber line combine.
The aperture of the sidewall pores of above-mentioned foaming pipe is 100～300 μ m.
The change of the processing condition of above-mentioned extruder head and preparation, the aperture of the through hole of the centre of feasible foaming pipe is adjustable.
With filtering the polypropylene expanded filter pearl of producing with the polypropylene expanded preparation method who filters pearl.
The present invention's outstanding and beneficial technical effects compared to existing technology is:
The polypropylene material that adopts when 1, preparation method of the present invention produces product is a kind of environmentally friendly material, so, in whole processing and use, be environmental protection.
2, the preparation method of the present invention foaming filter pearl of producing has effectively increased specific surface area, and there is a through hole centre, effectively overcome the phenomenon that in use results in blockage, polypropylene expanded filter pearl can not caused wearing and tearing in processes such as back flushing, life-span prolongs greatly, can be for 10～15 years.
3, the heatproof height of the product produced of preparation method of the present invention more than 130 ℃, is applicable to that the environment of low temperature and high temperature is done the filtration filter material.
Embodiment
With specific embodiment the present invention is further described below:
Filter the preparation method with polypropylene expanded filter pearl; it is characterized in that: select for use heatproof o'clock more than 130 ℃; fusing point is base-material at the polypropylene more than 150 ℃; with supercritical co as whipping agent; at supercritical co/polypropylene expanded forcing machine the polypropylene expanded filter pearl head of hollow opening pass is installed; add polypropylene; nucleator is after forcing machine is mixing; inject a certain amount of carbonic acid gas; then in last rank forcing machine and the mixing of rank forcing machine down; plasticate down; with carbonic acid gas (account for gross weight 0.12%～0.16%); polypropylene (account for gross weight 97.5%～98%) and nucleator (account for gross weight 2%～2.5%) raw material forms uniform solution; the technological temperature of the last rank forcing machine of this moment is set at and is higher than 25～35 ℃ of polypropylene fusing points; gas injection section temperature is higher than 15～30 ℃ of the technological temperatures of rank forcing machine; the technological temperature of following rank forcing machine and extruder head temperature are set at and are higher than 10～15 ℃ of selected polypropylene fusing points; after treating stable extruding; can obtain the side-wall hole rate more than 90%; there is a through hole centre; sidewall is covered with the polypropylene expanded pipe of filtration of micropore; after air naturally cooling or air cooling equipment cooling, can prepare the polypropylene expanded filter pearl of filtering usefulness with special-purpose dicing machine pelletizing.
The outline of above-mentioned foaming filter pearl is the figure that circle or ellipse or Polygons or line segment and camber line combine.
The aperture of the sidewall pores of above-mentioned foaming pipe or title abscess is 100～300 μ m.
The change of the processing condition of above-mentioned extruder head and preparation, the aperture of the through hole of the centre of feasible foaming pipe is adjustable.
With filtering the polypropylene expanded filter pearl of producing with the polypropylene expanded preparation method who filters pearl.
Above-described embodiment is preferred embodiment of the present invention only, is not to limit protection scope of the present invention according to this, so: all equivalences of doing according to structure of the present invention, shape, principle change, and all should be covered by within protection scope of the present invention.
Claims (5)
1. filter the preparation method with polypropylene expanded filter pearl; it is characterized in that: select for use heatproof o'clock more than 130 ℃; fusing point is base-material at the polypropylene more than 150 ℃; with supercritical co as whipping agent; at supercritical co/polypropylene expanded forcing machine the polypropylene expanded filter pearl head of hollow opening pass is installed; add polypropylene; nucleator is after forcing machine is mixing; inject a certain amount of carbonic acid gas; then in last rank forcing machine and the mixing of rank forcing machine down; plasticate down; with carbonic acid gas; polypropylene and nucleator raw material form uniform solution; the technological temperature of the last rank forcing machine of this moment is set at and is higher than 25～35 ℃ of polypropylene fusing points; gas injection section temperature is higher than 15～30 ℃ of the technological temperatures of rank forcing machine; the technological temperature of following rank forcing machine and extruder head temperature are set at and are higher than 10～15 ℃ of selected polypropylene fusing points; after treating stable extruding; can obtain the side-wall hole rate more than 90%; there is a through hole centre; sidewall is covered with the polypropylene expanded pipe of filtration of micropore; after air naturally cooling or air cooling equipment cooling, can prepare the polypropylene expanded filter pearl of filtering usefulness with special-purpose dicing machine pelletizing.
2. filtration according to claim 1 is characterized in that with the preparation method of polypropylene expanded filter pearl: the outline of described foaming filter pearl is the figure that circle or ellipse or Polygons or line segment and camber line combine.
3. filtration according to claim 1 is with the preparation method of polypropylene expanded filter pearl, and it is characterized in that: the aperture of the sidewall pores of described foaming pipe is 100～300 μ m.
4. filtration according to claim 1 is characterized in that with the preparation method of polypropylene expanded filter pearl: the change of the processing condition of described extruder head and preparation makes the foam aperture of through hole of centre of pipe adjustable.
5. the polypropylene expanded filter pearl of producing with the preparation method of polypropylene expanded filter pearl with the described filtration of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129337.8A CN103205014B (en) | 2013-04-12 | 2013-04-12 | Polypropylene foamed filtering ball for filtration and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129337.8A CN103205014B (en) | 2013-04-12 | 2013-04-12 | Polypropylene foamed filtering ball for filtration and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103205014A true CN103205014A (en) | 2013-07-17 |
| CN103205014B CN103205014B (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310129337.8A Expired - Fee Related CN103205014B (en) | 2013-04-12 | 2013-04-12 | Polypropylene foamed filtering ball for filtration and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103205014B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731214A (en) * | 2016-11-19 | 2017-05-31 | 合肥创新轻质材料有限公司 | A kind of lightweight material for water treatment and preparation method thereof |
| CN111004438A (en) * | 2019-12-06 | 2020-04-14 | 云南中烟工业有限责任公司 | Foamed polymer filter stick material for cigarettes and preparation method thereof |
| CN113772808A (en) * | 2021-10-11 | 2021-12-10 | 合肥学院 | Method for hanging EPP filler on membrane in biological trickling filter |
| CN115531978A (en) * | 2022-09-14 | 2022-12-30 | 江苏永冠给排水设备有限公司 | Preparation method and application of novel suspended lightweight filter material for drinking water treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100837106B1 (en) * | 2007-04-10 | 2008-06-12 | (주)한우포옴 | A method for manufacturing of non-crosslinked polypropylene foam sheet |
| CN101538387A (en) * | 2008-03-17 | 2009-09-23 | 中国科学院宁波材料技术与工程研究所 | Polypropylene foaming material and production method thereof |
-
2013
- 2013-04-12 CN CN201310129337.8A patent/CN103205014B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100837106B1 (en) * | 2007-04-10 | 2008-06-12 | (주)한우포옴 | A method for manufacturing of non-crosslinked polypropylene foam sheet |
| CN101538387A (en) * | 2008-03-17 | 2009-09-23 | 中国科学院宁波材料技术与工程研究所 | Polypropylene foaming material and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731214A (en) * | 2016-11-19 | 2017-05-31 | 合肥创新轻质材料有限公司 | A kind of lightweight material for water treatment and preparation method thereof |
| CN111004438A (en) * | 2019-12-06 | 2020-04-14 | 云南中烟工业有限责任公司 | Foamed polymer filter stick material for cigarettes and preparation method thereof |
| CN113772808A (en) * | 2021-10-11 | 2021-12-10 | 合肥学院 | Method for hanging EPP filler on membrane in biological trickling filter |
| CN115531978A (en) * | 2022-09-14 | 2022-12-30 | 江苏永冠给排水设备有限公司 | Preparation method and application of novel suspended lightweight filter material for drinking water treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103205014B (en) | 2015-02-18 |
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| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANTAI CHENGYI NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: TIANTAI FULI INDUSTRIAL CLOTH FACTORY Effective date: 20150313 |
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Effective date of registration: 20150313 Address after: 317200, Tiantai County, Zhejiang province Baihe Town under the road Patentee after: The sincere new material Co., Ltd of balcony Address before: 317200, Zhejiang City, Taizhou province Tiantai County Baihe Town under the road Patentee before: Tiantai County Fuli Industrial Cloth Factory |
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Effective date of registration: 20171123 Address after: 6, No. 28, building 2, building 1, 1 West Avenue, Qingyang District, Sichuan, Chengdu, 610000 Patentee after: Liu Ke Address before: 317200, Tiantai County, Zhejiang province Baihe Town under the road Patentee before: The sincere new material Co., Ltd of balcony |
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Granted publication date: 20150218 Termination date: 20210412 |
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