CN113445364B - Flame-retardant air filter paper and preparation method thereof - Google Patents
Flame-retardant air filter paper and preparation method thereof Download PDFInfo
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- CN113445364B CN113445364B CN202010222548.6A CN202010222548A CN113445364B CN 113445364 B CN113445364 B CN 113445364B CN 202010222548 A CN202010222548 A CN 202010222548A CN 113445364 B CN113445364 B CN 113445364B
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 67
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 66
- 239000003365 glass fiber Substances 0.000 claims abstract description 18
- 229920000742 Cotton Polymers 0.000 claims abstract description 15
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 14
- 229920006282 Phenolic fiber Polymers 0.000 claims abstract description 14
- 239000004642 Polyimide Substances 0.000 claims abstract description 14
- 239000003513 alkali Substances 0.000 claims abstract description 14
- 229920001721 polyimide Polymers 0.000 claims abstract description 14
- YCGKJPVUGMBDDS-UHFFFAOYSA-N 3-(6-azabicyclo[3.1.1]hepta-1(7),2,4-triene-6-carbonyl)benzamide Chemical compound NC(=O)C1=CC=CC(C(=O)N2C=3C=C2C=CC=3)=C1 YCGKJPVUGMBDDS-UHFFFAOYSA-N 0.000 claims abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 30
- 238000001914 filtration Methods 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 229920000297 Rayon Polymers 0.000 claims description 7
- 229920001131 Pulp (paper) Polymers 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000013055 pulp slurry Substances 0.000 claims description 6
- 238000007761 roller coating Methods 0.000 claims description 6
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims description 5
- 229940083037 simethicone Drugs 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 90
- 239000002585 base Substances 0.000 description 8
- 239000000839 emulsion Substances 0.000 description 8
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 8
- 230000009172 bursting Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 5
- 238000011002 quantification Methods 0.000 description 5
- 229920002545 silicone oil Polymers 0.000 description 5
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 4
- 238000007865 diluting Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 229920000889 poly(m-phenylene isophthalamide) Polymers 0.000 description 4
- -1 polyisophthaloyl Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- 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
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2003—Glass or glassy material
- B01D39/2017—Glass or glassy material the material being filamentary or fibrous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/02—Synthetic cellulose fibres
- D21H13/08—Synthetic cellulose fibres from regenerated cellulose
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/22—Condensation polymers of aldehydes or ketones
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/13—Silicon-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/34—Ignifugeants
Abstract
The invention relates to the technical field of filter materials, and discloses flame-retardant air filter paper and a preparation method thereof, wherein the flame-retardant air filter paper comprises the following components in parts by weight: 30-60 parts of cotton linter pulp treated by alkali, 30-50 parts of glass fiber, 10-15 parts of melamine formaldehyde resin fiber, 10-15 parts of poly m-phenylene isophthalamide fiber, 5-15 parts of phenolic fiber and 5-15 parts of polyimide fiber.
Description
Technical Field
The invention relates to the technical field of filter materials, in particular to flame-retardant air filter paper and a preparation method thereof.
Background
The flame-retardant air filter paper is special paper for manufacturing a paper filter element in an automobile air filter, is used for filtering air entering an internal combustion engine, provides clean combustion air for the internal combustion engine, and can raise the temperature of the air filter paper for combustion due to high temperature of a cylinder, hot air backflow and the like, so that the air filter paper is required to have high-level flame retardance while the high-filtering-efficiency high-precision filtering performance is maintained, the currently used flame-retardant air filter paper cannot achieve the double standards of high-filtering performance and high flame retardance at the same time, the service life of the flame-retardant air filter paper is short, and the flame-retardant air filter paper is replaced more frequently, for example, chinese patent application publication number: CN105672045a, publication date 2016, month 15, the invention is named as flame-retardant air filter paper and preparation method, the preparation method is: (1) Diluting the water-based impregnated flame retardant with water to obtain a flame retardant solution; (2) Diluting the aqueous styrene-acrylic emulsion with water to obtain a styrene-acrylic emulsion for impregnation; (3) Mixing mercerized pulp, polyester fiber and softwood pulp, fluffing, and making air filter paper base paper; (4) Immersing the air filter paper base paper into the flame retardant solution, taking out, removing superfluous flame retardant solution on the surface, and solidifying to obtain flame retardant base paper; (5) Immersing the flame-retardant base paper into the styrene-acrylic emulsion for impregnation, taking out, removing the excessive styrene-acrylic emulsion for impregnation on the surface, and solidifying to obtain the flame-retardant air filter paper, wherein the flame-retardant air filter paper has the defects that the filter performance of the filter paper can reach higher standards, but the strength, the toughness and the bursting strength are insufficient, the filter paper is easy to damage and reduce the filtering effect when in use, the flame-retardant performance of the air filter paper is endowed by adopting an impregnation mechanism, the flame-retardant performance of the filter paper is obviously reduced after long-term use, and the service life of the filter paper is shorter.
Disclosure of Invention
The invention provides the flame-retardant air filter paper with high filtering performance, high flame retardance, high strength, good toughness and long service life and the preparation method thereof, which are used for solving the defects that the flame-retardant air filter paper in the prior art cannot achieve the double standards of high filtering performance and high flame retardance at the same time, and the flame retardance of the filter paper is fast in failure, low in strength, poor in toughness and short in service life.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the flame-retardant air filter paper comprises the following components in parts by weight: 30-60 parts of alkali-treated cotton linter pulp, 10-30 parts of glass fiber, 10-15 parts of melamine formaldehyde resin fiber, 10-15 parts of poly m-phenylene isophthalamide fiber, 5-15 parts of phenolic fiber and 5-15 parts of polyimide fiber.
The flame-retardant air filter paper prepared by adopting the preparation method has the main performance indexes of 42 mu m average pore diameter, 55 mu m maximum pore diameter, 380+/-10 kPa dry burst and 98+/-5L/square meter S. In the component proportion, the cotton linter pulp and the glass fiber which are treated by alkali form the main components of the flame-retardant air filter paper, wherein the cotton linter pulp is used as basic pulp for supporting, the glass fiber has higher heat resistance and mechanical strength, the strength and toughness of the filter paper are improved, the basic flame-retardant performance is realized, the melamine formaldehyde resin fiber, the poly-m-phenylene isophthalamide fiber, the phenolic fiber and the polyimide fiber are used as functional parts, the flame-retardant performance of the filter paper is improved, and the air filter paper made of the fibers has better filtering performance, and has higher flexibility, bursting strength and flame-retardant performance than the common flame-retardant air filter paper.
Preferably, the glass fibers have a particle size of no greater than 100nm. The glass fiber with smaller grain diameter is beneficial to interweaving and forming of the fiber, so that the filter paper with good strength is obtained.
Preferably, the quantification of the flame-retardant air filter paper is 180+/-5 g/m < 2 >. Proper quantification is determined to balance the relationship among strength, filtration effect and rate, too high quantification can lead to too thick filter paper and reduced filtration rate, while too low quantification can lead to insufficient strength and filtration effect.
Preferably, the flame-retardant air filter paper also comprises 10-20 parts of viscose fiber in parts by weight. The viscose fiber improves the bonding force among the fibers and enhances the strength and toughness of the filter paper.
The preparation method of the flame-retardant air filter paper is characterized by comprising the following steps of:
a) Taking 30-60 parts of alkali-treated cotton linter pulp, fluffing by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with the pulp degree of 15-17 DEG SR;
b) Taking 10-30 parts of glass fibers, carrying out fluffing by using a fiber fluffer, and carrying out online polishing by using a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry obtained in the step a) and the step b), adding 10-15 parts of untwined melamine formaldehyde resin fibers, 10-15 parts of poly m-phenylene isophthalamide fibers, 5-15 parts of phenolic fibers and 5-15 parts of polyimide fibers, and uniformly stirring to obtain target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing 20-40 parts of methanol, 10-20 parts of polyacrylamide, 2-5 parts of simethicone, 2-5 parts of polyvinyl alcohol and 5-10 parts of PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for not less than 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
e) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
The flame-retardant air filter paper and the preparation method thereof have the following advantages: high filtering performance, high flame retardance, high strength, good toughness and long service life.
Drawings
FIG. 1 is a table of technical parameters of flame retardant air filter paper.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
Comparative example
A flame retardant air filter paper product made by the steps of:
(1) Diluting the water-based impregnated flame retardant to 1% -15% by using water to obtain a flame retardant solution;
(2) Diluting the aqueous styrene-acrylic emulsion with water to a solid content of 1% -10% to obtain a styrene-acrylic emulsion for impregnation;
(3) Mixing mercerized pulp, polyester fiber and softwood pulp according to the mass ratio of 20% -60%, 20% -50% and 20% -60%, fluffing, and making air filter paper base paper;
(4) Immersing the air filter paper base paper into the flame retardant solution for 10-60 s, taking out, removing superfluous flame retardant solution on the surface, and curing for 10-60 s at 50-120 ℃ to obtain flame retardant base paper;
(5) Immersing the flame-retardant base paper into the styrene-acrylic emulsion for 10-60 s, taking out, removing the superfluous styrene-acrylic emulsion on the surface, and solidifying for 10-60 s at 50-120 ℃ to obtain the flame-retardant air filter paper.
The main performance indexes comprise the air permeability 130L per square meter.S, the tensile strength 23.1N.m/g, the burst index 2.42kPa per square meter/g, the maximum pore diameter 37.1 mu m and the carbonization length 4mm.
Example 1
The flame-retardant air filter paper is prepared from the following components in parts by weight: 30 parts of alkali-treated cotton linter pulp, 10 parts of glass fiber, 10 parts of melamine formaldehyde resin fiber, 10 parts of poly (m-phenylene isophthalamide) fiber, 5 parts of phenolic fiber, 5 parts of polyimide fiber, 10 parts of viscose fiber, 20 parts of methanol, 10 parts of polyacrylamide, 2 parts of dimethyl silicone oil, 2 parts of polyvinyl alcohol and 5 parts of PAE resin.
The target flame-retardant air filter paper is prepared according to the following steps:
a) Fluffing the alkali-treated cotton linter pulp by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with a pulp degree of 15-17 DEG SR;
b) The glass fiber is fluffed by a fiber fluffer, and then is subjected to on-line polishing by a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry prepared in the step a) and the step b), adding the fluffed melamine formaldehyde resin fiber, the polyisophthaloyl metaphenylene diamine fiber, the phenolic fiber and the polyimide fiber, and uniformly stirring to prepare target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing the obtained methanol, polyacrylamide, dimethyl silicone oil, polyvinyl alcohol and PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for at least 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
e) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
Example 2
The flame-retardant air filter paper is prepared from the following components in parts by weight: 40 parts of alkali-treated cotton linter pulp, 17 parts of glass fiber, 12 parts of melamine formaldehyde resin fiber, 12 parts of poly (m-phenylene isophthalamide) fiber, 8 parts of phenolic fiber, 8 parts of polyimide fiber, 13 parts of viscose fiber, 25 parts of methanol, 13 parts of polyacrylamide, 3 parts of simethicone, 3 parts of polyvinyl alcohol and 7 parts of PAE resin.
The target flame-retardant air filter paper is prepared according to the following steps:
a) Fluffing the alkali-treated cotton linter pulp by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with a pulp degree of 15-17 DEG SR;
b) The glass fiber is fluffed by a fiber fluffer, and then is subjected to on-line polishing by a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry prepared in the step a) and the step b), adding the fluffed melamine formaldehyde resin fiber, the polyisophthaloyl metaphenylene diamine fiber, the phenolic fiber and the polyimide fiber, and uniformly stirring to prepare target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing the obtained methanol, polyacrylamide, dimethyl silicone oil, polyvinyl alcohol and PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for at least 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
e) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
Example 3
The flame-retardant air filter paper is prepared from the following components in parts by weight: 50 parts of alkali-treated cotton linter pulp, 24 parts of glass fiber, 14 parts of melamine formaldehyde resin fiber, 14 parts of poly (m-phenylene isophthalamide) fiber, 12 parts of phenolic fiber, 12 parts of polyimide fiber, 17 parts of viscose fiber, 33 parts of methanol, 16 parts of polyacrylamide, 4 parts of simethicone, 4 parts of polyvinyl alcohol and 9 parts of PAE resin.
The target flame-retardant air filter paper is prepared according to the following steps:
a) Fluffing the alkali-treated cotton linter pulp by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with a pulp degree of 15-17 DEG SR;
b) The glass fiber is fluffed by a fiber fluffer, and then is subjected to on-line polishing by a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry prepared in the step a) and the step b), adding the fluffed melamine formaldehyde resin fiber, the polyisophthaloyl metaphenylene diamine fiber, the phenolic fiber and the polyimide fiber, and uniformly stirring to prepare target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing the obtained methanol, polyacrylamide, dimethyl silicone oil, polyvinyl alcohol and PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for at least 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
e) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
Example 4
The flame-retardant air filter paper is prepared from the following components in parts by weight: 60 parts of alkali-treated cotton linter pulp, 30 parts of glass fiber, 15 parts of melamine formaldehyde resin fiber, 15 parts of poly (m-phenylene isophthalamide) fiber, 15 parts of phenolic fiber, 15 parts of polyimide fiber, 20 parts of viscose fiber, 40 parts of methanol, 20 parts of polyacrylamide, 5 parts of simethicone, 5 parts of polyvinyl alcohol and 10 parts of PAE resin.
The target flame-retardant air filter paper is prepared according to the following steps:
a) Fluffing the alkali-treated cotton linter pulp by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with a pulp degree of 15-17 DEG SR;
b) The glass fiber is fluffed by a fiber fluffer, and then is subjected to on-line polishing by a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry prepared in the step a) and the step b), adding the fluffed melamine formaldehyde resin fiber, the polyisophthaloyl metaphenylene diamine fiber, the phenolic fiber and the polyimide fiber, and uniformly stirring to prepare target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing the obtained methanol, polyacrylamide, dimethyl silicone oil, polyvinyl alcohol and PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for at least 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
e) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
The performance of the flame-retardant air filter paper prepared in comparative examples and examples 1-4 is tested, and the test results are shown in Table 1, wherein the quantitative test adopts a side-fixing method of GB/T451.2-2002 paper and paperboard quantification; thickness measurements were performed as specified in GB/T451.3; the tensile strength is measured by using GB/T31110-2014 paper and paperboard Z-direction tensile strength; determination of air permeability as specified in GB/TGB/T-1997; the measurement of the bursting strength is according to the specification of GB/T454-2002, and the testing direction is that the bursting is carried out from the inflow surface to the outflow surface of the fluid when the filter paper is used; flame retardant rating the second part of the filter paper for the filter of the JB/T12651.2-2016 internal combustion engine: the detection method is performed.
As can be seen from the contents of Table 1, the flame-retardant air filter paper obtained by the invention has higher strength, toughness, air permeability, bursting strength and flame retardant grade, and the air permeability and bursting strength are not obviously reduced after flame retardant test.
The raw materials and facilities used in the present invention are common raw materials and facilities used in the art unless otherwise specified, and the methods used in the present invention are common methods used in the art unless otherwise specified.
The flame-retardant air filter paper and the preparation method thereof have the beneficial effects of high filtering performance, high flame retardance, high strength, good toughness and long service life.
Claims (4)
1. The flame-retardant air filter paper is characterized by comprising the following components in parts by weight:
30-60 parts of alkali-treated cotton linter pulp;
10-30 parts of glass fiber;
10-15 parts of melamine formaldehyde resin fiber;
10-15 parts of poly m-phenylene isophthalamide fiber;
5-15 parts of phenolic fibers;
5-15 parts of polyimide fiber;
10-20 parts of viscose fiber.
2. A flame retardant air filter paper according to claim 1, wherein the glass fibers have a particle size of no more than 100nm.
3. A fire-retardant air filter paper according to claim 1, characterized in that the ration of the fire-retardant air filter paper is 180+ -5 g/m 2 。
4. A method of preparing a flame retardant air filter paper according to any one of claims 1 to 3, comprising the steps of:
a) Taking 30-60 parts of alkali-treated cotton linter pulp, fluffing by a fiber fluffer, and carrying out online grinding by a double-disc refiner to obtain pulp with the pulp degree of 15-17 DEG SR;
b) Taking 10-30 parts of glass fibers, carrying out fluffing by using a fiber fluffer, and carrying out online polishing by using a double-disc refiner to obtain pulp slurry with the slurry degree of 2-5 DEG SR;
c) Mixing the slurry obtained in the step a) and the step b), adding 10-15 parts of untwined melamine formaldehyde resin fibers, 10-15 parts of poly m-phenylene isophthalamide fibers, 5-15 parts of phenolic fibers and 5-15 parts of polyimide fibers, and uniformly stirring to obtain target paper pulp;
d) Forming the target slurry prepared in the step c) in an inclined wire paper machine or a flow measuring cylinder paper machine;
e) Preparing an impregnant, namely placing 20-40 parts of methanol, 10-20 parts of polyacrylamide, 2-5 parts of simethicone, 2-5 parts of polyvinyl alcohol and 5-10 parts of PAE resin into a reaction kettle, fully stirring at 50-80 ℃ for not less than 2 hours, cooling to room temperature, and filtering by using gauze with 60-100 meshes to obtain the target impregnant;
f) Immersing the formed paper manufactured in the step d) in the target impregnant manufactured in the step e) for at least 6 hours, wherein an immersing mode adopts a roller coating method of a gravure screen surface;
g) Drying and solidifying the impregnated paper through a drying cylinder to obtain the target flame-retardant air filter paper.
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