CN104494248A - Low-flame-spread composite damping plate - Google Patents

Low-flame-spread composite damping plate Download PDF

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Publication number
CN104494248A
CN104494248A CN201410713508.6A CN201410713508A CN104494248A CN 104494248 A CN104494248 A CN 104494248A CN 201410713508 A CN201410713508 A CN 201410713508A CN 104494248 A CN104494248 A CN 104494248A
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Prior art keywords
damping
component
cream
mass percent
carbon black
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CN201410713508.6A
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Chinese (zh)
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CN104494248B (en
Inventor
李楚雄
曹学波
彭泽胜
刘华忠
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HUBEI HAIFENG NEW MATERIALS Co Ltd
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HUBEI HAIFENG NEW MATERIALS Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C08L75/08—Polyurethanes from polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2313/00—Elements other than metals
    • B32B2313/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/02—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/10—Mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2371/00—Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a low-flame-spread composite damping plate which is composed of a damping paste and a damping plate, wherein the damping paste is attached to a substrate, and the damping plate is attached to the damping paste; and the damping paste is prepared by mixing and stirring a component A and a component B. The component A is synthesized by reacting polyether 2000, polyether 3050 and TDI (toluene diisocyanate). The component B is composed of modified alumina hydrate, mica powder, carbon black, silicon oil, ethylene glycol, dibutyl ester and Moca. The damping plate is prepared by compounding a noise reduction adhesive, white sand powder, modified alumina hydrate, carbon black, triethylamine, dibutyl ester and a vulcanizing agent. The low-flame-spread composite damping plate has the functions of damping and noise reduction, has the advantages of high composite loss factor, wide damping temperature range, normal-temperature reaction curing, uniform and adjustable thickness, high adhesive force, no cracking and no shedding, and is convenient for construction.

Description

A kind of low flame spread composite damping board
Technical field
The invention provides a kind of low flame spread material, be specifically related to a kind of composite damping board with excellent damping vibration attenuation sound insulation, sealing, the combination property such as heat insulation, belong to mechanical articles for use field.
Background technology
In the running, because a lot of position all can produce friction, friction can bring noise and heat to machine, not only can produce noise pollution, and the heat produced also can make wear and tear in machines.The sheet material that market produces does material mainly with pitch and plastic cement, and with Instant cement or brothers are good etc. does alite paste, at high temperature or in construction have different odor, elastic modelling quantity is little, and heat-resisting, resistance to profit is poor, pastes not in placely easily to come off; And existing market is more and more stricter to the performance requirement of composite damping sheet material, require its odorlessness, solvent-free, elastic modelling quantity is large, and damping temp field width, density is little, different curve firm pasting.The lower damping of high-frequency vibration is obvious.And current composite damping sheet material cannot reach above-mentioned condition.
Fire proofing material is the surface for flammable substrates, can reduce by the combustibility being coated with material surface, the rapid spread of retardance fire, in order to improve by a kind of special material of the fire endurance being coated with material, fire proofing material is coated in substrate surface, except having fire retardation, also have antirust, waterproof, anticorrosion, wear-resisting, heat-resisting and coating toughness, coloring, adhesiveness, easily dryness and have the performances such as certain gloss, it is widely used.
Boats and ships are as the flowing building on ocean and inland river, and the fire safety demands of its ship is very high, need to make uniform requirement to the fire safety performance of operation boats and ships, and the low flame spread performance of finishing material peculiar to vessel need meet the requirement of each regulation and pact.
Not yet occur that both there is low flame spread performance in the art, there is again the damping material of noise reduction damping performance, if therefore provide a kind of low flame spread composite damping board simultaneously with above-mentioned functions, be so inherently widely used.
Summary of the invention
The invention provides a kind of composite damping board with excellent low flame spread performance.This material solves the problem in background technology, has the advantage of vibration damping, noise reduction and low flame spread.
Realizing the technical scheme that above-mentioned purpose of the present invention adopts is:
A kind of low flame spread composite damping board, be made up of damping cream and damping sheet, wherein damping cream is attached on base material, and damping sheet is attached on damping cream, and wherein the thickness of damping cream is 1 ~ 2mm, and the thickness of damping sheet is 2 ~ 8mm,
Described damping cream is mixed together according to the mass ratio of 1:1.2 ~ 1.8 by component A and B component; Described component A is by following material through Reactive Synthesis, and each material and mass percent thereof are:
Polyethers 2,000 40% ~ 45%, polyethers 3,050 40% ~ 45%, TDI 15% ~ 20%;
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 25% ~ 35%, mica powder 25% ~ 35%, carbon black 8% ~ 12%, silicone oil 1% ~ 2%, ethylene glycol 1% ~ 2%, dibutyl ester 14% ~ 22%, does not block 7% ~ 11%;
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 15% ~ 25%, white sand powder 15% ~ 25%, modification hydrated alumina 35% ~ 45%, carbon black 1.5% ~ 2.5%, triethylamine 1.5% ~ 2.5%, dibutyl ester 8% ~ 12%, vulcanizing agent 4% ~ 8%.
Described component A is made up of following material, and each material and the mass percent shared by component A thereof are:
Polyethers 2,000 41.2%, polyethers 3,050 41.2%, TDI 17.6%.
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 30%, mica powder 30%, carbon black 10%, silicone oil 1.5%, ethylene glycol 1.5%, dibutyl ester 18%, does not block 9%.
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 20%, white sand powder 20%, modification hydrated alumina 40%, carbon black 2%, triethylamine 2%, dibutyl ester 10%, vulcanizing agent 6%.
The noise reducing damping cream of described noise reduction glue for providing in the application number patent that is 201310313671.9.
The low flame spread composite damping board provided in the present invention, be made up of damping sheet and damping cream, wherein damping cream is attached on base material, damping sheet is attached on damping cream, wherein the damping and amortization of damping cream is exactly in fact high polymer mechanical loss under given conditions, the one side or the two sides that damping cream are coated in substrate layer form free damping cream structure, when base material vibration during flexural deformation, there is the macromolecular material damping cream of viscoplasticity and high internal resistance, produce compression with base material and extend and distortion, vibrational energy is changed into heat energy loss and falls by it, effectively vibration & noise is controlled from (sound) source that shakes, namely there is mechanical loss, reach the damping function of damping noise reduction.
When damping cream and damping plates are combined with each other use, this compound damping material due to damping plates different from the elastic modelling quantity of damping cream after solidification, when system or base material produce vibration, damping cream and damping plates also vibrate thereupon, not only produce stretcher strain, and generation detrusion, become heat energy loss to fall the changes mechanical energy of vibration, thus reduce the noise of vibration generation.
Low flame spread composite damping board provided by the present invention also has normal-temperature reaction solidification, and easy construction, can be used for various bent beans flour noodle, and construction thickness is adjustable, solvent-free, nontoxic, and good flame resistance, strong adhesion, does not ftracture, do not come off, good with various priming paint matching.
Detailed description of the invention
Below in conjunction with specific embodiment, detailed specific description is done to the present invention, but protection scope of the present invention is not limited to following examples:
Embodiment 1
A kind of low flame spread composite damping board that the present embodiment provides, be made up of damping cream and damping sheet, wherein damping cream is attached on base material, and damping sheet is attached on damping cream, and wherein the thickness of damping cream is 1.5mm, and the thickness of damping sheet is 6mm,
Described damping cream is mixed together according to the mass ratio of 1:1.5 by component A and B component; Described component A is by following material through Reactive Synthesis, and each material and mass percent thereof are:
Polyethers 2,000 41.2%, polyethers 3,050 41.2%, TDI 17.6%.
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 30%, mica powder 30%, carbon black 10%, silicone oil 1.5%, ethylene glycol 1.5%, dibutyl ester 18%, does not block 9%.
In use, after component A and B component being mixed, can spread upon on base material, after testing, its performance parameter is as follows for above-mentioned damping cream obtained in the present embodiment:
Project Index
Damping temperature domain (DEG C) -40～160
Material self damping factor (tan δ) ≥0.2
Elastic modelling quantity (dyne/cm 2) ≥1×10 8
Hardening time (h/25 DEG C) Surface drying :≤10 to do solid work≤20
Anti-flammability (oxygen index (OI) v/v%) ≥32
Density (g/cm 3) ≤1.2
Adhesive force (cross-hatching) 100％
Toxicity test Meet GJB3881-1999
Sea water resistance/resistance to diesel oil (6 months) Coating is unchanged
Acid and alkali-resistance Meet GB 1763-79
Salt spray resistance (h) Meet GB 1771-79
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 20%, white sand powder 20%, modification hydrated alumina 40%, carbon black 2%, triethylamine 2%, dibutyl ester 10%, vulcanizing agent 6%.
Through detecting after damping sheet mixing and molding prepared in the present embodiment, its performance parameter is as follows:
Project Index
Damping temperature domain (DEG C) -40～160
Material self damping factor (tan δ) ≥0.2
Elastic modelling quantity (dyne/cm 2) ≥1×10 8
Anti-flammability (oxygen index (OI) v/v%) ≥32
Density (g/cm 3) ≤1.7
Toxicity test Meet GJB3881-1999
Sea water resistance/resistance to diesel oil (25 DEG C/month) > is unchanged for June
Tensile strength (Mpa) ≥1.6
Acid and alkali-resistance Meet GB 1763-79
Salt spray resistance (h) Meet GB 1771-79
Low flame spread composite damping board prepared in the present embodiment has been carried out the experiment of surfacing combustibility according to the relevant requirements of 2010FTP rule annex 1 Part V, and experimental result is as follows:
Note: critical heat flux when CFE=stops working
Qsb=sustained combustion heat
Qt=Thermal release total amount
Qp=HRR peak value
Experimental result shows, the low flame spread composite damping board that the present embodiment provides meets the floor covering material with low flame spread that SOLAS pact II-2 chapter requires.
Embodiment 2
A kind of low flame spread composite damping board that the present embodiment provides, be made up of damping cream and damping sheet, wherein damping cream is attached on base material, and damping sheet is attached on damping cream, and wherein the thickness of damping cream is 1mm, and the thickness of damping sheet is 3mm,
Described damping cream is mixed together according to the mass ratio of 1:1.3 by component A and B component; Described component A is by following material through Reactive Synthesis, and each material and mass percent thereof are:
Polyethers 2,000 42.5%, polyethers 3,050 42.5%, TDI 15%.
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 26%, mica powder 34%, carbon black 8%, silicone oil 2%, ethylene glycol 2%, dibutyl ester 21%, does not block 7%.
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 16%, white sand powder 24%, modification hydrated alumina 36%, carbon black 2.5%, triethylamine 2.5%, dibutyl ester 11.5%, vulcanizing agent 7.5%.
Embodiment 3
A kind of low flame spread composite damping board that the present embodiment provides, be made up of damping cream and damping sheet, wherein damping cream is attached on base material, and damping sheet is attached on damping cream, and wherein the thickness of damping cream is 2mm, and the thickness of damping sheet is 8mm,
Described damping cream is mixed together according to the mass ratio of 1:1.8 by component A and B component; Described component A is by following material through Reactive Synthesis, and each material and mass percent thereof are:
Polyethers 2,000 40%, polyethers 3,050 40%, TDI 20%.
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 34%, mica powder 26%, carbon black 12%, silicone oil 1%, ethylene glycol 1%, dibutyl ester 15%, does not block 11%.
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 24%, white sand powder 16%, modification hydrated alumina 44%, carbon black 1.5%, triethylamine 1.5%, dibutyl ester 8.5%, vulcanizing agent 4.5%.

Claims (4)

1. a low flame spread composite damping board, it is characterized in that being made up of damping cream and damping sheet, wherein damping cream is attached on base material, and damping sheet is attached on damping cream, and wherein the thickness of damping cream is 1 ~ 2mm, and the thickness of damping sheet is 2 ~ 8mm,
Described damping cream is mixed together according to the mass ratio of 1:1.2 ~ 1.8 by component A and B component; Described component A is by following material through Reactive Synthesis, and each material and mass percent thereof are:
Polyethers 2,000 40% ~ 45%, polyethers 3,050 40% ~ 45%, TDI 15% ~ 20%;
Described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 25% ~ 35%, mica powder 25% ~ 35%, carbon black 8% ~ 12%, silicone oil 1% ~ 2%, ethylene glycol 1% ~ 2%, dibutyl ester 14% ~ 22%, does not block 7% ~ 11%;
Described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 15% ~ 25%, white sand powder 15% ~ 25%, modification hydrated alumina 35% ~ 45%, carbon black 1.5% ~ 2.5%, triethylamine 1.5% ~ 2.5%, dibutyl ester 8% ~ 12%, vulcanizing agent 4% ~ 8%.
2. low flame spread composite damping board according to claim 1, is characterized in that: described component A is made up of following material, and each material and the mass percent shared by component A thereof are:
Polyethers 2,000 41.2%, polyethers 3,050 41.2%, TDI 17.6%.
3. low flame spread composite damping board according to claim 1, is characterized in that: described B component is made up of following material, and each material and the mass percent shared by B component thereof are:
Modification hydrated alumina 30%, mica powder 30%, carbon black 10%, silicone oil 1.5%, ethylene glycol 1.5%, dibutyl ester 18%, does not block 9%.
4. low flame spread composite damping board according to claim 1, is characterized in that: described damping sheet is made up of following material, and each material and mass percent shared wherein thereof are:
Noise reduction glue 20%, white sand powder 20%, modification hydrated alumina 40%, carbon black 2%, triethylamine 2%, dibutyl ester 10%, vulcanizing agent 6%.
CN201410713508.6A 2014-11-29 2014-11-29 A kind of low flame spread composite damping board Expired - Fee Related CN104494248B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108439894A (en) * 2018-02-06 2018-08-24 安徽科耀环保科技有限公司 The material and manufacturing method of novel noise reduction sound insulation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100323194A1 (en) * 2007-02-09 2010-12-23 Yoshifumi Matsuda Vibration damper and vibration damping structure
CN103351492A (en) * 2013-07-29 2013-10-16 青岛爱尔家佳新材料有限公司 Damping rubber plate and preparation method thereof
CN103360938A (en) * 2013-07-24 2013-10-23 麻城市海风降噪材料有限责任公司 Noise reduction damping paste and preparation method thereof
CN103756167A (en) * 2013-12-13 2014-04-30 苗玄 Composite damping sound insulation material and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100323194A1 (en) * 2007-02-09 2010-12-23 Yoshifumi Matsuda Vibration damper and vibration damping structure
CN103360938A (en) * 2013-07-24 2013-10-23 麻城市海风降噪材料有限责任公司 Noise reduction damping paste and preparation method thereof
CN103351492A (en) * 2013-07-29 2013-10-16 青岛爱尔家佳新材料有限公司 Damping rubber plate and preparation method thereof
CN103756167A (en) * 2013-12-13 2014-04-30 苗玄 Composite damping sound insulation material and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108439894A (en) * 2018-02-06 2018-08-24 安徽科耀环保科技有限公司 The material and manufacturing method of novel noise reduction sound insulation

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