CN102995498B - A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof - Google Patents
A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof Download PDFInfo
- Publication number
- CN102995498B CN102995498B CN201210426988.9A CN201210426988A CN102995498B CN 102995498 B CN102995498 B CN 102995498B CN 201210426988 A CN201210426988 A CN 201210426988A CN 102995498 B CN102995498 B CN 102995498B
- Authority
- CN
- China
- Prior art keywords
- modified
- corrosion
- preparation
- filter
- poly
- 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.)
- Expired - Fee Related
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000839 emulsion Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000003365 glass fiber Substances 0.000 claims abstract description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 241000609240 Ambelania acida Species 0.000 claims abstract description 12
- 229920000742 Cotton Polymers 0.000 claims abstract description 12
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010905 bagasse Substances 0.000 claims abstract description 12
- 239000010902 straw Substances 0.000 claims abstract description 12
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 12
- 239000012188 paraffin wax Substances 0.000 claims abstract description 9
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims abstract description 6
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920001732 Lignosulfonate Polymers 0.000 claims abstract description 6
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 6
- 239000001923 methylcellulose Substances 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 239000001993 wax Substances 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011268 mixed slurry Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof, the weight portion of its constitutive material is: bagasse pulp 70-80, glass fibre 20-25, cotton synthetic fibre fiber 10-20, modified straw powder 4-6, modified acrylic acid emulsion 0.8-1.2, MTMS 1-3, ATBC 0.7-1.0, smoke sheet rubber 1.5-2.5, antimony trioxide powder 1.0-1.5, paraffin wax emulsions 0.8-1.5, oxidized polyethlene wax 1-3, poly-4-methyl-1-pentene 0.7-0.9, poly-methylcellulose 1-2, lignosulfonates 0.8-1.2, modified soluble nano silicone colloidal sol 2-4.The present invention adopts bagasse pulp, glass fibre and cotton synthetic fibre fiber simultaneously as main material, environmental protection science, composition of raw materials is reasonable, and each group partition inter-capacitive is good, and intensity, toughness, corrosion resistance improve, surface gloss is good, under normal temperature and worst hot case, there are stable performance indications, there is good resistance to gentle filter effect, its maximum diameter of hole 48-53 μm, average pore size 34-36 μm, becomes paper air permeability at 82-87L/m
2.S between.
Description
Technical field
The present invention relates to automobile filter field, specifically a kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof.
Background technology
Cleaner is the important spare part of engine, it act as filtering and enters the particulate such as dust and mechanical admixture in the air of engine, diesel oil, machine oil, to reduce the wearing and tearing of Cylinder Liner Piston Ring in Engine, crankshaft link rod motion pair and high-pressure oil pump plunger matching parts, optimize the combustion process of engine, reduce the discharge of the organic pollutions such as carbon monoxide.
As the effective filter medium of one, filter paper is widely used in every field.Different according to the kinds of fibers of composition filter paper, performance, the purposes of filter paper are also different, have the ordinary filter paper for general occasion, under high temperature glass fiber filter paper, also have ultra-clean polypropylene filter paper etc.According to filter paper whether impregnation, two large classes can be divided into, i.e. impregnation filter paper and non-impregnation filter paper.Impregnation filter paper is divided into again solidification filter paper and uncured filter paper.
Along with improving constantly of filtering requirement, any requirement be all more and more difficult to by the fibrous filter paper of single on satisfied use, so arisen at the historic moment by the filter paper of multiple fiber combinations, the fiber that filter paper is commonly used in producing has wood fibre, chemical fibre, glass fibre etc.
Summary of the invention
The object of the present invention is to provide a kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof, the present invention adopts bagasse pulp, glass fibre and cotton synthetic fibre fiber simultaneously as main material, environmental protection science, composition of raw materials is reasonable, each group partition inter-capacitive is good, intensity, toughness, corrosion resistance improve, surface gloss is good, stable performance indications are had under normal temperature and worst hot case, there is good resistance to gentle filter effect, its maximum diameter of hole 48-53 μm, average pore size 34-36 μm, become paper air permeability at 82-87L/m
2.S between.
The present invention adopts following technical scheme to achieve these goals:
Corrosion-and high-temp-resistant filter paper of filter, the weight portion of its constitutive material is: bagasse pulp 70-80, glass fibre 20-25, cotton synthetic fibre fiber 10-20, modified straw powder 4-6, modified acrylic acid emulsion 0.8-1.2, MTMS 1-3, ATBC 0.7-1.0, smoke sheet rubber 1.5-2.5, antimony trioxide powder 1.0-1.5, paraffin wax emulsions 0.8-1.5, oxidized polyethlene wax 1-3, poly-4-methyl-1-pentene 0.7-0.9, poly-methylcellulose 1-2, lignosulfonates 0.8-1.2, modified soluble nano silicone colloidal sol 2-4.
Corrosion-and high-temp-resistant filter paper of filter, the weight portion of its constitutive material is: bagasse pulp 75, glass fibre 22, cotton synthetic fibre fiber 15, modified straw powder 5, modified acrylic acid emulsion 1, MTMS 2, ATBC 0.85, smoke sheet rubber 2, antimony trioxide powder 1.2, paraffin wax emulsions 1.2, oxidized polyethlene wax 2, poly-4-methyl-1-pentene 0.8, poly-methylcellulose 1.5, lignosulfonates 1, modified soluble nano silicone colloidal sol 3.
The preparation method of corrosion-and high-temp-resistant filter paper of filter, comprises the following steps:
(1) take each raw material by the weight portion of constitutive material, put into pulper size degradation after bagasse pulp, glass fibre and cotton synthetic fibre fiber being mixed, obtain the slurry that solid content is 4-6%, obtain mixed slurry;
(2) in the mixed slurry of step (1), add other raw materials of residue by the weight portion of constitutive material, be heated to 70-80 DEG C; After fluffer is discongested, then defibrination, after defibrination, gained slurry is sized mixing through adding water, conveniently paper technology copy paper to solid content 2-3%, shaping squeezing, is drying to obtain.
Described modified straw powder, preparation method thereof is for adding the immersion of 10-15% sodium hydroxide solution after 3-4 hour by powder of straw, pull out, dry at 40-45 DEG C of temperature to moisture 2-3%, adding 3-4% chlorinated paraffin wax immediately mixes, and granulation obtains.
Described modified acrylic acid emulsion preparation method, for add 4-5% magnetic, 3-5% aluminium oxide in acrylic emulsion, is mixed and heated to 70-80 DEG C, cools and get final product after 30-40 minute.
The preparation method of described modified soluble nano silicone colloidal sol, for water-soluble nanoscale silica sol is added 4-5% nano-carbon powder, 3-5% iron oxide, is mixed and heated to 70-80 DEG C, and after 30-40 minute, cooling obtains.
Beneficial effect of the present invention:
The present invention adopts bagasse pulp, glass fibre and cotton synthetic fibre fiber simultaneously as main material, environmental protection science, composition of raw materials is reasonable, and each group partition inter-capacitive is good, and intensity, toughness, corrosion resistance improve, surface gloss is good, under normal temperature and worst hot case, there are stable performance indications, there is good resistance to gentle filter effect, its maximum diameter of hole 48-53 μm, average pore size 34-36 μm, becomes paper air permeability at 82-87L/m
2.S between.
Detailed description of the invention
Embodiment 1: corrosion-and high-temp-resistant filter paper of filter, the weight portion of its constitutive material is: bagasse pulp 75, glass fibre 22, cotton synthetic fibre fiber 15, modified straw powder 5, modified acrylic acid emulsion 1, MTMS 2, ATBC 0.85, smoke sheet rubber 2, antimony trioxide powder 1.2, paraffin wax emulsions 1.2, oxidized polyethlene wax 2, poly-4-methyl-1-pentene 0.8, poly-methylcellulose 1.5, lignosulfonates 1, modified soluble nano silicone colloidal sol 3.
The preparation method of corrosion-and high-temp-resistant filter paper of filter, comprises the following steps:
(1) take each raw material by the weight portion of constitutive material, put into pulper size degradation after bagasse pulp, glass fibre and cotton synthetic fibre fiber being mixed, obtain the slurry that solid content is 4-6%, obtain mixed slurry;
(2) in the mixed slurry of step (1), add other raw materials of residue by the weight portion of constitutive material, be heated to 70-80 DEG C; After fluffer is discongested, then defibrination, after defibrination, gained slurry is sized mixing through adding water, conveniently paper technology copy paper to solid content 2-3%, shaping squeezing, is drying to obtain.
Described modified straw powder, preparation method thereof is for adding the immersion of 10-15% sodium hydroxide solution after 3-4 hour by powder of straw, pull out, dry at 40-45 DEG C of temperature to moisture 2-3%, adding 3-4% chlorinated paraffin wax immediately mixes, and granulation obtains.
Described modified acrylic acid emulsion preparation method, for add 4-5% magnetic, 3-5% aluminium oxide in acrylic emulsion, is mixed and heated to 70-80 DEG C, cools and get final product after 30-40 minute.
The preparation method of described modified soluble nano silicone colloidal sol, for water-soluble nanoscale silica sol is added 4-5% nano-carbon powder, 3-5% iron oxide, is mixed and heated to 70-80 DEG C, and after 30-40 minute, cooling obtains.
The performance detection data of the corrosion-and high-temp-resistant filter paper of filter obtained by above-mentioned method is as follows:
Grammes per square metre: 126g/cm
2; Bursting strength: 305Kpa; Air permeability: 488ml/10cm
2min; Its maximum diameter of hole 48-53 μm, average pore size 34-36 μm, become paper air permeability at 82-87L/m
2.S between.
Claims (2)
1. a corrosion-and high-temp-resistant filter paper of filter, is characterized in that the weight portion of its constitutive material is: bagasse pulp 70-80, glass fibre 20-25, cotton synthetic fibre fiber 10-20, modified straw powder 4-6, modified acrylic acid emulsion 0.8-1.2, MTMS 1-3, ATBC 0.7-1.0, smoke sheet rubber 1.5-2.5, antimony trioxide powder 1.0-1.5, paraffin wax emulsions 0.8-1.5, oxidized polyethlene wax 1-3, poly-4-methyl-1-pentene 0.7-0.9, poly-methylcellulose 1-2, lignosulfonates 0.8-1.2, modified soluble nano silicone colloidal sol 2-4;
The preparation method of described corrosion-and high-temp-resistant filter paper of filter, comprises the following steps:
(1) take each raw material by the weight portion of constitutive material, put into pulper size degradation after bagasse pulp, glass fibre and cotton synthetic fibre fiber being mixed, obtain the slurry that solid content is 4-6%, obtain mixed slurry;
(2) in the mixed slurry of step (1), add other raw materials of residue by the weight portion of constitutive material, be heated to 70-80 DEG C; After fluffer is discongested, then defibrination, after defibrination, gained slurry is sized mixing through adding water, conveniently paper technology copy paper to solid content 2-3%, shaping squeezing, is drying to obtain;
Described modified straw powder, preparation method thereof is for adding the immersion of 10-15% sodium hydroxide solution after 3-4 hour by powder of straw, pull out, dry at 40-45 DEG C of temperature to moisture 2-3%, adding 3-4% chlorinated paraffin wax immediately mixes, and granulation obtains;
Described modified acrylic acid emulsion preparation method, for add 4-5% magnetic, 3-5% aluminium oxide in acrylic emulsion, is mixed and heated to 70-80 DEG C, cools and get final product after 30-40 minute;
The preparation method of described modified soluble nano silicone colloidal sol, for water-soluble nanoscale silica sol is added 4-5% nano-carbon powder, 3-5% iron oxide, is mixed and heated to 70-80 DEG C, and after 30-40 minute, cooling obtains.
2. corrosion-and high-temp-resistant filter paper of filter according to claim 1, is characterized in that the weight portion of its constitutive material is: bagasse pulp 75, glass fibre 22, cotton synthetic fibre fiber 15, modified straw powder 5, modified acrylic acid emulsion 1, MTMS 2, ATBC 0.85, smoke sheet rubber 2, antimony trioxide powder 1.2, paraffin wax emulsions 1.2, oxidized polyethlene wax 2, poly-4-methyl-1-pentene 0.8, poly-methylcellulose 1.5, lignosulfonates 1, modified soluble nano silicone colloidal sol 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426988.9A CN102995498B (en) | 2012-10-31 | 2012-10-31 | A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426988.9A CN102995498B (en) | 2012-10-31 | 2012-10-31 | A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102995498A CN102995498A (en) | 2013-03-27 |
| CN102995498B true CN102995498B (en) | 2015-10-07 |
Family
ID=47924555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210426988.9A Expired - Fee Related CN102995498B (en) | 2012-10-31 | 2012-10-31 | A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102995498B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334342A (en) * | 2013-05-30 | 2013-10-02 | 蚌埠首创滤清器有限公司 | Corrosion resistance filter paper and preparation method thereof |
| CN103993509B (en) * | 2014-04-25 | 2016-05-18 | 蚌埠德美过滤技术有限公司 | Automobile air filter paper of a kind of stay-in-grade loaded zirconia and preparation method thereof |
| CN114075801A (en) * | 2020-08-18 | 2022-02-22 | 杭州特种纸业有限公司 | Nanometer bypass filter paper and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556120A (en) * | 2003-12-31 | 2004-12-22 | 中国化工建设总公司常州涂料化工研究 | Composite nano material modified emulsion and its preparation method |
| CN101255299A (en) * | 2007-12-28 | 2008-09-03 | 马鞍山钢铁股份有限公司 | An environmentally friendly heat-resistant acrylic resin insulating coating |
| CN101898059A (en) * | 2010-07-28 | 2010-12-01 | 江苏菲特滤料有限公司 | Corrosion-resisting and heat-resisting compound filter material and preparation method thereof |
| CN102444054A (en) * | 2011-11-15 | 2012-05-09 | 苏州新业造纸有限公司 | Filter paper for cooling system of wire cutting processing and production method thereof |
| CN102500158A (en) * | 2011-11-29 | 2012-06-20 | 无锡格瑞普尔膜科技有限公司 | Preparation method for high-efficiency filter medium with adion exchanging function and membrane filtering function |
-
2012
- 2012-10-31 CN CN201210426988.9A patent/CN102995498B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556120A (en) * | 2003-12-31 | 2004-12-22 | 中国化工建设总公司常州涂料化工研究 | Composite nano material modified emulsion and its preparation method |
| CN101255299A (en) * | 2007-12-28 | 2008-09-03 | 马鞍山钢铁股份有限公司 | An environmentally friendly heat-resistant acrylic resin insulating coating |
| CN101898059A (en) * | 2010-07-28 | 2010-12-01 | 江苏菲特滤料有限公司 | Corrosion-resisting and heat-resisting compound filter material and preparation method thereof |
| CN102444054A (en) * | 2011-11-15 | 2012-05-09 | 苏州新业造纸有限公司 | Filter paper for cooling system of wire cutting processing and production method thereof |
| CN102500158A (en) * | 2011-11-29 | 2012-06-20 | 无锡格瑞普尔膜科技有限公司 | Preparation method for high-efficiency filter medium with adion exchanging function and membrane filtering function |
Non-Patent Citations (2)
| Title |
|---|
| 秸秆纤维复合材料的发展概况;杨军等;《材料导报》;19991231;第13卷(第6期);50-51页 * |
| 纳米粒子改性丙烯酸聚合物的研究进展;胥昌纯等;《化工进展》;20111231;第30卷;432-436 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102995498A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102979004B (en) | Zirconia-loaded filter paper for filter and preparation method thereof | |
| CN102995495B (en) | Modified attapulgite-containing filter paper and preparation method thereof | |
| CN102995494B (en) | Active carbon-loading filter paper and preparation method thereof | |
| CN102872652B (en) | Filter paper containing modified dickite powder | |
| CN102995496B (en) | Filter paper for gasoline filter and preparation method of filter paper | |
| CN102877373B (en) | A kind of preparation method of the fuel filter filter paper containing modified pearl potter's clay | |
| CN103981770B (en) | A kind of gasoline filter filter paper and preparation method thereof | |
| CN102877375B (en) | A kind of preparation method of the filter paper for air filter containing modified kaolin | |
| CN102912677A (en) | Air-filtration paper for automobile engine filter and preparation method of air-filtration paper | |
| CN102995497B (en) | Filter paper for air filter and preparation method of filter paper | |
| CN102912684B (en) | Preparation technology of filter paper for air filter | |
| CN102877372A (en) | High temperature-resisting filter paper for automobile filter | |
| CN102995499B (en) | A kind of filter paper of filter containing smectite powder and preparation method thereof | |
| CN102995498B (en) | A kind of corrosion-and high-temp-resistant filter paper of filter and preparation method thereof | |
| CN103382687A (en) | Heat-resistance filter paper and preparation method thereof | |
| CN102995493B (en) | Filter paper for elevator filter and preparation method of filter paper | |
| CN102979005B (en) | High temperature-resistant flame-retardant filter paper and preparation method thereof | |
| CN104005272A (en) | Glass fiber-containing highly waterproof air filter paper and making method thereof | |
| CN102877377B (en) | Preparation process for glass fiber-containing filter paper | |
| CN102979006B (en) | Modified nanometer titanium dioxide-containing filter paper for filter and preparation method thereof | |
| CN103756402A (en) | Preparation method of biomass-based deinking agent | |
| CN103334343A (en) | Thermal resistance filter paper and preparation method thereof | |
| CN103966916B (en) | A kind of energy saving and environment friendly cleaner filter paper and preparation method thereof | |
| CN104005276A (en) | Copper oxide-containing composite air filter paper and making method thereof | |
| CN103966918B (en) | Filter paper of filter of a kind of corrosion-and high-temp-resistant and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20181031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |