CN106541593A - A kind of production technology for harmful substance sewage filter net in absorption effluent - Google Patents
A kind of production technology for harmful substance sewage filter net in absorption effluent Download PDFInfo
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- CN106541593A CN106541593A CN201610952342.2A CN201610952342A CN106541593A CN 106541593 A CN106541593 A CN 106541593A CN 201610952342 A CN201610952342 A CN 201610952342A CN 106541593 A CN106541593 A CN 106541593A
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- China
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- parts
- exchange resin
- production technology
- harmful substance
- filter net
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- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D28/00—Producing nets or the like, e.g. meshes, lattices
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- 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
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
-
- 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
Abstract
The invention discloses a kind of production technology for harmful substance sewage filter net in absorption effluent, comprises the following steps：Prepare net raw material processed；Polyester slice with high viscosity and polyurethane fiber are heated at high temperature, nanometer glass fiber and auxiliary agent is added, stir to obtain blend glue stuff A；By adsorbent resin, ion exchange resin and active carbon nanoparticles heated and stirred at high temperature, stir to obtain blend glue stuff B；Blend glue stuff A and blend glue stuff B is obtained into industrial filament C and industrial filament D by the spinning of melt spinning machine respectively；Industrial filament C and industrial filament D are made into composite filament, drainage screen are woven using composite filament.Production technology proposed by the present invention, simple to operate, low production cost, the sewage filter net of preparation, with good acid and alkali-resistance, ageing-resistant performance, heat-resisting quantity is good, and long service life, adsorptivity are strong, harmful substance in the effective absorption effluent of energy, plays isolation of purified effect, and easy cleaning is worthy to be popularized.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to it is a kind of for harmful substance sewage mistake in absorption effluent
The production technology of filter screen.
Background technology
Paper industry is the industry for manufacturing various types of other paper products, and closely bound up with the national economic development, it is related to woods
Multiple industries such as industry, agricultural, machine-building, chemical industry, electric automatization, transportation, environmental protection.Paper industry uses timber, rice
Grass, phragmites communiss, rag etc. be raw material, the steaming and decocting of Jing High Temperature High Pressure and isolate cellulose, make paper pulp.In paper making process,
Many paper wastes can be produced, which is very harmful, serious polluted source brings serious to ecological environment and human health
Threaten.
Polyester (PET）Belong to macromolecular compound.Fiber polyester chip is used to manufacture terylene short fiber peacekeeping polyester filament,
The raw material of polyster fibre enterprise processing fiber and Related product is supplied with, terylene is occupied as the maximum kind of yield in chemical fibre
The market share of chemical fibre industry nearly 80%, therefore, the turn of the market of polyester series and development trend are the weights of chemical fibre industry concern
Point.As developing rapidly for China's economic, the domestic Apparent con- sumption to polyester slice increase rapidly, the polyester production capacity of China is fast
Speed development.Polyester has tension intensity big, and resistance to ag(e)ing is strong, and resistant of high or low temperature is good, and hardness is good, and easily braiding, weaving molding etc. is excellent
Point, existing polyester-type paper grade (stock) net in the market, with high temperature resistant, the activity beneficial of remaining unchanged for a long period of time property under high temperature action,
But papermaking baking operation is only used for, is acted on single.Based on above statement, the present invention proposes a kind of for being harmful in absorption effluent
The production technology of material sewage filter net.
The content of the invention
The invention aims to shortcoming present in prior art is solved, and the one kind for proposing is used in absorption effluent
The production technology of harmful substance sewage filter net.
A kind of production technology for harmful substance sewage filter net in absorption effluent, comprises the following steps：
S1, preparation net raw material processed, including following components：30～60 parts of polyester slice with high viscosity, polyurethane fiber 30～40
Part, 18～30 parts of adsorbent resin, 10～15 parts of ion exchange resin, 15～25 parts of active carbon nanoparticles, nanometer glass fiber 3～8
Part, 3～8 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 2 at 270～300 DEG C of high temperature
～6h, after dissolving completely, insulated and stirred sequentially adds the nanometer glass fiber of proportion described in step S1 while stirring and helps
Agent, mixing speed are 100～300r/min, to the blend glue stuff A that stirs to obtain；
S3, by the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles in 170～220 DEG C of high temperature
Under carry out heated and stirred, mixing speed is 300～500r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 10～500 mesh.
Preferably, the net processed in step S1 is included with raw material：32～57 parts of polyester slice with high viscosity, polyurethane are fine
32～38 parts of dimension, 21.6～28 parts of adsorbent resin, 12～14 parts of ion exchange resin, 18～22 part, nanometer glass of active carbon nanoparticles
4～6 parts of glass fiber, 4～6 parts of auxiliary agent.
Preferably, the net processed in step S1 is included with raw material：50 parts of polyester slice with high viscosity, polyurethane fiber 35
Part, 24 parts of adsorbent resin, 12 parts of ion exchange resin, 20 parts of active carbon nanoparticles, 5 parts of nanometer glass fiber, 5 parts of auxiliary agent.
Preferably, the mass ratio of the polyester slice with high viscosity and polyurethane fiber in step S1 is 1～1.5:1.
Preferably, the mass ratio of the adsorbent resin and ion exchange resin in step S1 is 1.8～2:1.
Preferably, the ion exchange resin in step S1 is macroporous ion-exchange resin, including anion exchange resin and sun
Ion exchange resin, wherein, the weight ratio of anion exchange resin and cation exchange resin is 0.8～1：1～2.
Preferably, the auxiliary agent in step S1 includes surface conditioning agent, lubricant and coupling agent, wherein, each component
Percentage by weight be surface conditioning agent 10～40%, lubricant 20～50%, balance of coupling agent.
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, using nanometer glass
Glass fiber adding assistant is modified rear spinning to polyester and polyurethane fiber, using adsorbent resin, ion exchange resin and nanometer
Spinning after activity melting, two kinds of long filaments is made by way of doubling twisting and weave drainage screen after composite filament, simple to operate, raw
Low cost is produced, modified polyester has stronger tension intensity and hardness, and acid and alkali-resistance, high temperature resistant, ageing-resistant performance are carried
Height, using adsorbent resin and the synergism of ion exchange resin, greatly strengthen adsorption activity, sewage mistake prepared by the present invention
Filter screen, with good acid and alkali-resistance, ageing-resistant performance, heat-resisting quantity is good, long service life, and which also has stronger adsorptivity,
Harmful substance in the effective absorption effluent of energy, so as to play a part of isolation of purified, easy cleaning can be widely applied to papermaking and give up
The process of water and other industrial wastewaters, is worthy to be popularized.
Specific embodiment
The present invention is further explained with reference to specific embodiment.
Embodiment one
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, comprises the following steps：
S1, preparation net raw material processed, including following components：50 parts of polyester slice with high viscosity, 38 parts of polyurethane fiber, absorption tree
20 parts of fat, 11 parts of ion exchange resin, 18 parts of active carbon nanoparticles, 4 parts of nanometer glass fiber, 5 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 6h at 270 DEG C of high temperature, treated
After dissolving entirely, insulated and stirred sequentially adds the nanometer glass fiber and auxiliary agent of proportion described in step S1, stirring speed while stirring
Spend for 150r/min, to the blend glue stuff A that stirs to obtain；
S3, the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles are carried out at 190 DEG C of high temperature
Heated and stirred, mixing speed are 400r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 200 mesh.
Embodiment two
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, comprises the following steps：
S1, preparation net raw material processed, including following components：45 parts of polyester slice with high viscosity, 32 parts of polyurethane fiber, absorption tree
22 parts of fat, 13 parts of ion exchange resin, 20 parts of active carbon nanoparticles, 5 parts of nanometer glass fiber, 6 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 2h at 300 DEG C of high temperature, treated
After dissolving entirely, insulated and stirred sequentially adds the nanometer glass fiber and auxiliary agent of proportion described in step S1, stirring speed while stirring
Spend for 300r/min, to the blend glue stuff A that stirs to obtain；
S3, the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles are carried out at 170 DEG C of high temperature
Heated and stirred, mixing speed are 350r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 200 mesh.
Embodiment three
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, comprises the following steps：
S1, preparation net raw material processed, including following components：45 parts of polyester slice with high viscosity, 30 parts of polyurethane fiber, absorption tree
18 parts of fat, 10 parts of ion exchange resin, 25 parts of active carbon nanoparticles, 8 parts of nanometer glass fiber, 3 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 4h at 280 DEG C of high temperature, treated
After dissolving entirely, insulated and stirred sequentially adds the nanometer glass fiber and auxiliary agent of proportion described in step S1, stirring speed while stirring
Spend for 100r/min, to the blend glue stuff A that stirs to obtain；
S3, the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles are carried out at 200 DEG C of high temperature
Heated and stirred, mixing speed are 500r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 200 mesh.
Example IV
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, comprises the following steps：
S1, preparation net raw material processed, including following components：50 parts of polyester slice with high viscosity, 36 parts of polyurethane fiber, absorption tree
25 parts of fat, 15 parts of ion exchange resin, 22 parts of active carbon nanoparticles, 3 parts of nanometer glass fiber, 8 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 3h at 290 DEG C of high temperature, treated
After dissolving entirely, insulated and stirred sequentially adds the nanometer glass fiber and auxiliary agent of proportion described in step S1, stirring speed while stirring
Spend for 250r/min, to the blend glue stuff A that stirs to obtain；
S3, the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles are carried out at 220 DEG C of high temperature
Heated and stirred, mixing speed are 300r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 200 mesh.
Embodiment five
A kind of production technology for harmful substance sewage filter net in absorption effluent proposed by the present invention, comprises the following steps：
S1, preparation net raw material processed, including following components：40 parts of polyester slice with high viscosity, 40 parts of polyurethane fiber, absorption tree
20 parts of fat, 12 parts of ion exchange resin, 15 parts of active carbon nanoparticles, 6 parts of nanometer glass fiber, 4 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 5h at 280 DEG C of high temperature, treated
After dissolving entirely, insulated and stirred sequentially adds the nanometer glass fiber and auxiliary agent of proportion described in step S1, stirring speed while stirring
Spend for 200r/min, to the blend glue stuff A that stirs to obtain；
S3, the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles are carried out at 180 DEG C of high temperature
Heated and stirred, mixing speed are 450r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 200 mesh.
Drainage screen in embodiment proposed by the present invention～five is used to filter dustiness identical paper waste, Jing is surveyed
Water quality situation after filter screen filtration is as a result as follows：
| COD clearances（%） | SS clearances（%） | |
| Embodiment one | 36.4 | 85.7 |
| Embodiment two | 37.9 | 87.5 |
| Embodiment three | 37.3 | 87.1 |
| Example IV | 38.2 | 89.9 |
| Embodiment five | 36.1 | 85.3 |
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its invention
Design in addition equivalent or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of production technology for harmful substance sewage filter net in absorption effluent, it is characterised in that comprise the following steps：
S1, preparation net raw material processed, including following components：30～60 parts of polyester slice with high viscosity, polyurethane fiber 30～40
Part, 18～30 parts of adsorbent resin, 10～15 parts of ion exchange resin, 15～25 parts of active carbon nanoparticles, nanometer glass fiber 3～8
Part, 3～8 parts of auxiliary agent；
S2, the polyester slice with high viscosity and polyurethane fiber of proportion described in step S1 are heated into 2 at 270～300 DEG C of high temperature
～6h, after dissolving completely, insulated and stirred sequentially adds the nanometer glass fiber of proportion described in step S1 while stirring and helps
Agent, mixing speed are 100～300r/min, to the blend glue stuff A that stirs to obtain；
S3, by the adsorbent resin of proportion described in step S1, ion exchange resin and active carbon nanoparticles in 170～220 DEG C of high temperature
Under carry out heated and stirred, mixing speed is 300～500r/min, to the blend glue stuff B that stirs to obtain；
S4, the blend glue stuff A of gained in step S2 is obtained into industrial filament C by the spinning of melt spinning machine, by institute in step S3
The blend glue stuff B for obtaining is obtained industrial filament D by the spinning of melt spinning machine；
S5, by step S4 gained industrial filament C and industrial filament D composite filament is made by doubling twisting, using composite filament
Braiding is obtained the drainage screen that mesh number is 10～500 mesh.
2. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the net processed in step S1 is included with raw material：32～57 parts of polyester slice with high viscosity, polyurethane fiber 32～38
Part, 21.6～28 parts of adsorbent resin, 12～14 parts of ion exchange resin, 18～22 parts of active carbon nanoparticles, nanometer glass fiber 4～
6 parts, 4～6 parts of auxiliary agent.
3. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the net processed in step S1 is included with raw material：50 parts of polyester slice with high viscosity, 35 parts of polyurethane fiber, absorption
24 parts of resin, 12 parts of ion exchange resin, 20 parts of active carbon nanoparticles, 5 parts of nanometer glass fiber, 5 parts of auxiliary agent.
4. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the mass ratio of polyester slice with high viscosity and polyurethane fiber in step S1 is 1～1.5:1.
5. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the mass ratio of adsorbent resin and ion exchange resin in step S1 is 1.8～2:1.
6. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the ion exchange resin in step S1 is macroporous ion-exchange resin, including anion exchange resin and cation exchange
Resin, wherein, the weight ratio of anion exchange resin and cation exchange resin is 0.8～1：1～2.
7. a kind of production technology for harmful substance sewage filter net in absorption effluent according to claim 1, which is special
Levy and be, the auxiliary agent in step S1 includes surface conditioning agent, lubricant and coupling agent, wherein, the weight percent of each component
Than for surface conditioning agent 10～40%, lubricant 20～50%, balance of coupling agent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952342.2A CN106541593B (en) | 2016-11-03 | 2016-11-03 | A kind of production technology for harmful substance sewage filter net in absorption effluent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952342.2A CN106541593B (en) | 2016-11-03 | 2016-11-03 | A kind of production technology for harmful substance sewage filter net in absorption effluent |
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| Publication Number | Publication Date |
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| CN106541593A true CN106541593A (en) | 2017-03-29 |
| CN106541593B CN106541593B (en) | 2019-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051000A (en) * | 2017-04-21 | 2017-08-18 | 徐州工程学院 | A kind of water proof material and its manufacture method and application |
| CN108404519A (en) * | 2018-04-02 | 2018-08-17 | 苏州清荷坊环保科技有限公司 | A kind of sewage filter net for adsorbing harmful substance |
| CN113737312A (en) * | 2021-08-24 | 2021-12-03 | 南通强生石墨烯科技有限公司 | Graphene high-filterability fiber and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6167422A (en) * | 1984-09-11 | 1986-04-07 | 東レ株式会社 | Laver net |
| CN102704325A (en) * | 2012-06-06 | 2012-10-03 | 云南瑞升烟草技术（集团）有限公司 | Selective absorbing dry method paper filter material for cigarette filter tip rod and preparation method thereof |
-
2016
- 2016-11-03 CN CN201610952342.2A patent/CN106541593B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6167422A (en) * | 1984-09-11 | 1986-04-07 | 東レ株式会社 | Laver net |
| CN102704325A (en) * | 2012-06-06 | 2012-10-03 | 云南瑞升烟草技术（集团）有限公司 | Selective absorbing dry method paper filter material for cigarette filter tip rod and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051000A (en) * | 2017-04-21 | 2017-08-18 | 徐州工程学院 | A kind of water proof material and its manufacture method and application |
| CN108404519A (en) * | 2018-04-02 | 2018-08-17 | 苏州清荷坊环保科技有限公司 | A kind of sewage filter net for adsorbing harmful substance |
| CN113737312A (en) * | 2021-08-24 | 2021-12-03 | 南通强生石墨烯科技有限公司 | Graphene high-filterability fiber and preparation method thereof |
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| CN106541593B (en) | 2019-06-04 |
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