CN109232855A - A kind of preparation method of the compound porous sound-absorbing material of glass fibre - Google Patents
A kind of preparation method of the compound porous sound-absorbing material of glass fibre Download PDFInfo
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- CN109232855A CN109232855A CN201810748084.5A CN201810748084A CN109232855A CN 109232855 A CN109232855 A CN 109232855A CN 201810748084 A CN201810748084 A CN 201810748084A CN 109232855 A CN109232855 A CN 109232855A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Abstract
The present invention provides a kind of preparation methods of the compound porous sound-absorbing material of glass fibre, comprising the following steps: by glass marble heating melting, flows out through nickel-cadmium bushing, forms glass fibre；It is stretched through rubber roller, using second melting, division and drawing-off, forms secondary glass fiber, cut into glass fibre grain；Heating Explosion Sugarcane Bagasse lignin powder, polyethylene glycol 400, glycerine and sulfuric acid heating stirring are reacted；Stop reaction, adjusts pH value of solution, obtain product A；It takes polyether polyol to be added in reaction vessel, sequentially adds triethylenediamine solution, acid dibutyl tin, silicone oil, 1,1- bis- chloro- 1- fluoroethane, diphenylmethylene diisocyanate and water stirring；Product A and the stirring of glass fibre grain is added；It pours into mold and foams；It is put into baking oven and cures to obtain the final product.Material prepared by this law has fine mechanical property, and compression strength is high, is a kind of efficient sound-absorbing material with average sound absorption coefficient height.
Description
Technical field
The present invention relates to a kind of preparation methods of the compound porous sound-absorbing material of glass fibre.
Background technique
There is various sound in our living environment, such as voice, musical sound and vehicle gallop at all speed sound, have
A little sound are our needs, some are that we are unwanted, will affect our life and work.Come from physiological angle
It says, these we unwanted or sound not pleasant sound we term it noises.In the modern life, noise is
It is that audible unavoidably mainly has traffic noise, man-made noise and construction noise pollution etc. everywhere.The harm of noise it is more and
Greatly, its low, Hearing that can make one mood, or even cardiovascular system and digestive system are endangered, working efficiency is reduced, is influenced just
Often life, harm health.And with the development of society, noise problem is increasingly severe, therefore, reduce the harm of noise also by
It has been included in an important content of environmental protection.Reducing noise can mainly be eliminated the noise and two methods of Active Absorption by active,
Middle Active Absorption refers to be controlled from noise transmission approach and receptor, mainly using sound-absorbing material or acoustic material etc. come
Absorption sound energy changes sound wave direction, reduces noise level, is the most effective and most common method of noise control.Therefore, constantly
The good sound-absorbing material of sound absorption effect is researched and developed in pairs in human health, improves the quality of living all and has great importance.
Summary of the invention
Technical problems to be solved: providing a kind of preparation method of compound porous sound-absorbing material of glass fibre, prepared
The compound porous sound-absorbing material of glass fibre has fine mechanical property, and compression strength is up to 23.8MPa, while in frequency 300-
The average sound absorption coefficient of 6500Hz range is all larger than 0.56, is a kind of efficient sound-absorbing material.
Technical solution: a kind of preparation method of the compound porous sound-absorbing material of glass fibre, ingredient by weight, including with
Lower step:
(1) glass marble is heated to 1300-1400 DEG C, heel row bubble removing and impurity is melted, by 200 hole nickel-cadmium bushing streams
Out, the glass fibre that diameter is 25-35mm is formed；
(2) glass fibre is stretched by the rubber roller that linear velocity is 3-6m/min, using 1400-1550 DEG C, 280-320m/s's
High temperature and high speed combustion gas stream second melting, division and drawing-off form the secondary glass fiber that diameter is 20-30mm；
It (3) is 35-45mm at length by secondary glass fiber cutting；
(4) by 12-14 parts of Heating Explosion Sugarcane Bagasse lignin powder, 4-5 parts of polyethylene glycol 400s, 1-1.5 parts of glycerine and 0.5-0.7 parts
Sulfuric acid is added in the separable flask equipped with blender, thermometer and reflux condensing tube, is heated to 100-140 DEG C, and constantly stir
Mix reaction 50-70min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 25-30 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.4-0.5 parts of triethylenediamine solution and 0.4-
0.5 part of acid dibutyl tin, 1-1.5 parts of silicone oil, 6-10 part 1, the chloro- 1- fluoroethane of 1- bis-, two isocyanide of diphenylmethylene
Acid esters and 0.2-0.4 parts of water, and constantly stirred at revolving speed 1000-1500r/min；
(7) A and 3-5 parts of glass fibre grains of 25-30 parts of products are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
Mix 30-60s；
(8) it pours into the mold of preheating, at room temperature free foaming 1-2min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
Further, the polyether polyol is polyoxypropyleneglycol and polypropylene oxide triol, and the two mass ratio is
1:1。
Further, the isocyanate index of the diphenylmethylene diisocyanate is 1.2-1.3.
Further, it is heated to 120 DEG C in the step (4), reacts 60min.
Further, revolving speed is 130r/min in the step (6).
The utility model has the advantages that
There is fine mechanical property through the compound porous sound-absorbing material of glass fibre prepared by the present invention, compression strength is reachable
23.8MPa, most of porous materials all have acoustical absorptivity, and the generally material average sound absorption coefficient greater than 0.2 is known as absorbing sound
Material, material of the average sound absorption coefficient greater than 0.56 are known as efficient sound-absorbing material, and material of the present invention is in frequency 300-6500Hz model
The average sound absorption coefficient enclosed is all larger than 0.56, is a kind of efficient sound-absorbing material.
Specific embodiment
Embodiment 1
A kind of preparation method of the compound porous sound-absorbing material of glass fibre, ingredient is by weight, comprising the following steps:
(1) glass marble is heated to 1300 DEG C, melts heel row bubble removing and impurity, flowed out by 200 hole nickel-cadmium bushings, shape
The glass fibre for being 25mm at diameter；
(2) glass fibre is stretched by the rubber roller that linear velocity is 3m/min, using 1400 DEG C, the high temperature and high speed combustion gas of 280m/s
Second melting, division and drawing-off are flowed, the secondary glass fiber that diameter is 20-30mm is formed；
It (3) is 35mm at length by secondary glass fiber cutting；
(4) 12 parts of Heating Explosion Sugarcane Bagasse lignin powder, 4 parts of polyethylene glycol 400s, 1 part of glycerine and 0.5 part of sulfuric acid addition are equipped with
In the separable flask of blender, thermometer and reflux condensing tube, 100 DEG C are heated to, and be constantly stirred to react 50min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 25 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.4 part of triethylenediamine solution and 0.4 part of dibutyl
Dilaurate tin, 1 part of silicone oil, 6 parts of chloro- 1- fluoroethanes of 1,1- bis-, diphenylmethylene diisocyanate and 0.2 part of water, not
Break and stirred at revolving speed 1000r/min, wherein the isocyanate index of diphenylmethylene diisocyanate is 1.2；
(7) 25 parts of product A and 3 parts of glass fibre grains are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
30s；
(8) it pours into the mold of preheating, at room temperature free foaming 1min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
Embodiment 2
A kind of preparation method of the compound porous sound-absorbing material of glass fibre, ingredient is by weight, comprising the following steps:
(1) glass marble is heated to 1350 DEG C, melts heel row bubble removing and impurity, flowed out by 200 hole nickel-cadmium bushings, shape
The glass fibre for being 25-35mm at diameter；
(2) glass fibre is stretched by the rubber roller that linear velocity is 5m/min, using 1500 DEG C, the high temperature and high speed combustion gas of 300m/s
Second melting, division and drawing-off are flowed, the secondary glass fiber that diameter is 20-30mm is formed；
It (3) is 40mm at length by secondary glass fiber cutting；
(4) 13 parts of Heating Explosion Sugarcane Bagasse lignin powder, 4.5 parts of polyethylene glycol 400s, 1.3 parts of glycerine and 0.6 part of sulfuric acid are added
In separable flask equipped with blender, thermometer and reflux condensing tube, 120 DEG C are heated to, and be constantly stirred to react 60min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 28 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.45 part of triethylenediamine solution and 0.45 part of two fourth
Base dilaurate tin, 1.3 parts of silicone oil, 8 parts of chloro- 1- fluoroethanes of 1,1- bis-, diphenylmethylene diisocyanate and 0.3 part of water,
And constantly stirred at revolving speed 1300r/min, wherein the isocyanate index of diphenylmethylene diisocyanate is 1.2；
(7) 28 parts of product A and 4 parts of glass fibre grains are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
45s；
(8) it pours into the mold of preheating, at room temperature free foaming 1.5min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
Embodiment 3
A kind of preparation method of the compound porous sound-absorbing material of glass fibre, ingredient is by weight, comprising the following steps:
(1) glass marble is heated to 1350 DEG C, melts heel row bubble removing and impurity, flowed out by 200 hole nickel-cadmium bushings, shape
The glass fibre for being 25-35mm at diameter；
(2) glass fibre is stretched by the rubber roller that linear velocity is 3-6m/min, and using 1550 DEG C, the high temperature and high speed of 310m/s fires
Air-flow second melting, division and drawing-off form the secondary glass fiber that diameter is 20-30mm；
It (3) is 40mm at length by secondary glass fiber cutting；
(4) dress is added in 13 parts of Heating Explosion Sugarcane Bagasse lignin powder, 5 parts of polyethylene glycol 400s, 1.3 parts of glycerine and 0.6 part of sulfuric acid
Have in the separable flask of blender, thermometer and reflux condensing tube, is heated to 130 DEG C, and be constantly stirred to react 65min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 29 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.45 part of triethylenediamine solution and 0.45 part of two fourth
Base dilaurate tin, 1.4 parts of silicone oil, 9 parts of chloro- 1- fluoroethanes of 1,1- bis-, diphenylmethylene diisocyanate and 0.3 part of water,
And it is constantly stirred at revolving speed 1400r/min；
(7) 28 parts of product A and 4 parts of glass fibre grains are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
50s；
(8) it pours into the mold of preheating, at room temperature free foaming 1.5min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
Embodiment 4
A kind of preparation method of the compound porous sound-absorbing material of glass fibre, ingredient is by weight, comprising the following steps:
(1) glass marble is heated to 1400 DEG C, melts heel row bubble removing and impurity, flowed out by 200 hole nickel-cadmium bushings, shape
The glass fibre for being 25-35mm at diameter；
(2) glass fibre is stretched by the rubber roller that linear velocity is 6m/min, using 1550 DEG C, the high temperature and high speed combustion gas of 320m/s
Second melting, division and drawing-off are flowed, the secondary glass fiber that diameter is 20-30mm is formed；
It (3) is 45mm at length by secondary glass fiber cutting；
(4) dress is added in 14 parts of Heating Explosion Sugarcane Bagasse lignin powder, 5 parts of polyethylene glycol 400s, 1.5 parts of glycerine and 0.7 part of sulfuric acid
Have in the separable flask of blender, thermometer and reflux condensing tube, is heated to 140 DEG C, and be constantly stirred to react 70min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 30 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.5 part of triethylenediamine solution and 0.5 part of dibutyl
Dilaurate tin, 1.5 parts of silicone oil, 10 parts of chloro- 1- fluoroethanes of 1,1- bis-, diphenylmethylene diisocyanate and 0.4 part of water, and
It is constantly stirred at revolving speed 1500r/min, wherein the isocyanate index of diphenylmethylene diisocyanate is 1.3；
(7) 30 parts of product A and 5 parts of glass fibre grains are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
60s；
(8) it pours into the mold of preheating, at room temperature free foaming 2min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
Prepare having a size of 100mm × 100mm × 10mm(long × width x thickness) sample, using universal testing machine measurement material
Compression strength.
Using the acoustic absorptivity of AWA8551T type transmission function acoustic absorptivity test system and test composite material.
The partial properties index of the compound porous sound-absorbing material of 1 glass fibre of table
There is fine mechanical property through the compound porous sound-absorbing material of glass fibre prepared by the present invention, compression strength is reachable
23.8MPa, most of porous materials all have acoustical absorptivity, and the generally material average sound absorption coefficient greater than 0.2 is known as absorbing sound
Material, material of the average sound absorption coefficient greater than 0.56 are known as efficient sound-absorbing material, and material of the present invention is in frequency 300-6500Hz model
The average sound absorption coefficient enclosed is all larger than 0.56, is a kind of efficient sound-absorbing material.
Claims (5)
1. a kind of preparation method of the compound porous sound-absorbing material of glass fibre, it is characterised in that: ingredient by weight, including with
Lower step:
(1) glass marble is heated to 1300-1400 DEG C, heel row bubble removing and impurity is melted, by 200 hole nickel-cadmium bushing streams
Out, the glass fibre that diameter is 25-35mm is formed；
(2) glass fibre is stretched by the rubber roller that linear velocity is 3-6m/min, using 1400-1550 DEG C, 280-320m/s's
High temperature and high speed combustion gas stream second melting, division and drawing-off form the secondary glass fiber that diameter is 20-30mm；
(3) it is 35-45mm at length by secondary glass fiber cutting, obtains glass fibre grain；
(4) by 12-14 parts of Heating Explosion Sugarcane Bagasse lignin powder, 4-5 parts of polyethylene glycol 400s, 1-1.5 parts of glycerine and 0.5-0.7 parts
Sulfuric acid is added in the separable flask equipped with blender, thermometer and reflux condensing tube, is heated to 100-140 DEG C, and constantly stir
Mix reaction 50-70min；
(5) after reaction, cooled down immediately with ice water and stop reaction, with sodium hydrate regulator solution pH value to 7, obtain product A；
(6) it takes 25-30 parts of polyether polyol to be added in reaction vessel, sequentially adds 0.4-0.5 parts of triethylenediamine solution and 0.4-
0.5 part of acid dibutyl tin, 1-1.5 parts of silicone oil, 6-10 part 1, the chloro- 1- fluoroethane of 1- bis-, two isocyanide of diphenylmethylene
Acid esters and 0.2-0.4 parts of water, and constantly stirred at revolving speed 1000-1500r/min；
(7) A and 3-5 parts of glass fibre grains of 25-30 parts of products are added, are quickly stirred under the electric mixer of revolving speed 3000r/min
Mix 30-60s；
(8) it pours into the mold of preheating, at room temperature free foaming 1-2min；
(9) it after foam stops growing, is put into 65 DEG C of baking ovens and cures for 24 hours up to the compound porous sound-absorbing material of glass fibre.
2. a kind of preparation method of the compound porous sound-absorbing material of glass fibre according to claim 1, it is characterised in that: institute
Stating polyether polyol is polyoxypropyleneglycol and polypropylene oxide triol, and the two mass ratio is 1:1.
3. a kind of preparation method of the compound porous sound-absorbing material of glass fibre according to claim 1, it is characterised in that: institute
The isocyanate index for stating diphenylmethylene diisocyanate is 1.2-1.3.
4. a kind of preparation method of the compound porous sound-absorbing material of glass fibre according to claim 1, it is characterised in that: institute
It states and is heated to 120 DEG C in step (4), react 60min.
5. a kind of preparation method of the compound porous sound-absorbing material of glass fibre according to claim 1, it is characterised in that: institute
Stating revolving speed in step (6) is 130r/min.
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| CN105233569A (en) * | 2015-10-22 | 2016-01-13 | 南京航空航天大学 | Preparation method for glass fiber filtering material |
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