CN1236419C - High-efficiency paper base sound-absorbing material and preparation thereof - Google Patents
High-efficiency paper base sound-absorbing material and preparation thereof Download PDFInfo
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- CN1236419C CN1236419C CN 03128220 CN03128220A CN1236419C CN 1236419 C CN1236419 C CN 1236419C CN 03128220 CN03128220 CN 03128220 CN 03128220 A CN03128220 A CN 03128220A CN 1236419 C CN1236419 C CN 1236419C
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Abstract
The present invention relates to a high-efficiency paper base sound-absorbing material and a preparation thereof. The sound-absorbing material is composed of a paper made multihole base material and a coating of waterproof type foaming cement slurry. The triangle or polygon cavities formed by inserting paper to each other can capture sound waves and light aggregate cement slurry body covered on the material surface of the paper base can carry on diffuse reflection and further absorption. The cement slurry body has a protective action on the paper base material due to the waterproof measure. The sound-absorbing material firstly captures the sound wave into independent cavities and then uses hole seams of different sizes and fibre distributed on the mutihole cement and the light aggregate to absorb the sound wave and consume sound energy. Thus, the present invention has higher sound absorbing effect in the frequency range of 100 to 2000Hz and the average sound absorption coefficient can reach more than 0.6. The raw material source for preparing the sound-absorbing material is wide and cheap, and the preparation process of the sound-absorbing material is simple and easy in use, and favorable to popularize and application.
Description
Technical field
The present invention relates to a kind of novel building functional material, particularly can obviously improve the paper substrate acoustic absorbant and the manufacture craft of low, the intermediate frequency sound absorption characteristics of acoustic absorbant.
Background technology
Along with developing rapidly of industries such as industry, transportation, building industry, the harm of noise on human class is also increasing.At present, the same air pollution of noise pollution, water pollute together, are acknowledged as contemporary world three overall situation public hazards.Normal order of work of noise effect and work efficiency also influence daily life and physical and mental health.Estimate that according to the World Health Organization (WHO) only the loss that is brought by noise in U.S. every year is 4,000,000,000 dollars nearby.As seen, the control noise has become the human task of top priority, and the research of sound absorption and noise reduction material has been become one of important research direction of countries in the world scientific worker.
Several stages has been experienced in the development of acoustic absorbant: the phase one is to utilize natural organics such as cotton, fiber crops as acoustic absorbant, but owing to this class material is not prevented fires, factor such as non-moistureproof, perishable has limited their application; Subordinate phase is the stage that inorganic material has replaced above-mentioned organic material, and is crisp because of their property again, be difficult for construction, human body skin is had pungency etc. as expanded perlite building block, rock wool etc., fails to be used widely.But the cost of the inorganic acoustic absorbant of this class is low; Three phases is to utilize synthesized polymer material to produce new acoustic absorbant for base stock.Therefore, occurred various types of acoustic absorbants on the market, table 1 has been listed the kind of main acoustic absorbant.
The sound absorption qualities of all kinds of acoustical materials has selection to sound frequency as can be seen from Table 1, be that China's acoustic absorbant is unbalanced at the acoustical absorption coefficient of basic, normal, high frequency, some acoustic absorbant is not obvious for the Low Medium Frequency acoustically effective, and obvious for the medium-high frequency acoustically effective.Therefore, the acoustical material that Chang Fuhe is different in the practical application and attachedly satisfy efficient absorption to each frequency range with sound absorption structure.
In the existing acoustic absorbant quite a few being arranged is high-molecular organic material, and the cost of these high-molecular organic materials is higher, brings hidden fire-fighting danger to dependency structure simultaneously.Also have quite a few acoustic absorbant intensity lower, perhaps fragility height, the transportation of these problems affect acoustic absorbants, installation and serviceable life.
Therefore, based on above factors, invent that a kind of acoustically effective is good, manufacture craft is simple, cost is low, the durable acoustic absorbant of safety is people's hope.
Summary of the invention
The objective of the invention is to improve acoustic absorbant to assimilation effect low, medium frequency section sound wave, so as to based in, the traffic noise of low frequency reaches the purpose of efficient absorption.Simultaneously,, reduce production costs, this acoustic absorbant is used widely by selecting low-cost starting material and simple technology of preparing for use.
The technology path of realizing the object of the invention is, a kind of porous preforming paper substrate acoustic absorbant, form by porous substrate made of paper and water proof type foam cement slurry overlayer, the external diameter of a circle in the hole of described porous substrate made of paper is 1mm to 50mm, described water proof type foam cement slurry overlayer is a porous light-weight aggregate cement slurry overlayer, its porous light-weight aggregate cement slurry overlayer is by portland cement, expanded perlite, the propyl benzene emulsion, mekralon, gas-development agent, water-proofing agent and water are formed, and each composition was counted by weight during it was formed: 100 parts of portland cements, 1～10 part of expanded perlite, 5～10 parts of propyl benzene emulsions, 0.1～0.5 part of mekralon, 1～2 part of gas-development agent, 1～5 part of water-proofing agent, 40～60 parts in water.
Described porous substrate made of paper is the triangle of mutual scraps of paper formation of pegging graft or the material of polygon through hole array cavity structure, and its triangle or polygonal circumscribed circle diameter are 1mm to 50mm, and the best is 5mm to 15mm.
The preparation method of acoustic absorbant of the present invention, its preparation process is as follows:
1) the paper substrate porous substrate is the preparation of Paper base hollow cavity plate, and with yellow plate paper sheet grafting triangularity or polygon through hole array, its triangle or polygonal circumscribed circle diameter are 1mm to 50mm, and the best is 5mm to 15mm,
2) with portland cement, expanded perlite, propyl benzene emulsion, mekralon, gas-development agent, water-proofing agent and water, join in the stirring machine in the ratio of setting, stirred 1～5 minute, to make good fluidity a large amount of evenly slurries of bubble are arranged,
3) the Paper base hollow cavity plate slurry that places step (2) to be prepared that will select size floods, and make cement slurry wrap cardboard fully, but do not seal the hole of refill material,
4) the Paper base hollow cavity plate that flooded cement slurry vertically is placed on the flat board by hole, allow the part slurry under action of gravity, flow to the bottom, make the hole sealing of porous plate bottom or semiclosed, original like this through hole refill material becomes blind hole or half-blindness orifice plate
5) maintenance under normal temperature, 50%～80% relative humidity of step (4) gained paper substrate cement slurry compound substance was promptly got spendable paper substrate acoustic absorbant more than 20 days.
The used gas-development agent of the present invention is a common rosin acid sodium, and water-proofing agent is common inorganic aluminate class water-proofing agent.
Discover that this cavity resonance sound absorption structure makes the inner both macro and micro structure that forms certain aperture ranges of porosint, promptly cellular macropore combines with micropore.Form the micropore in different apertures at the macropore inside surface, increased absorptive character, make product good assimilation effect all be arranged the noise of low frequency, intermediate frequency and high frequency to various different frequency sound.Simultaneously, the acoustic absorbant of one deck porous is arranged in cavity body, make sound that diffuse reflection take place in cavity body, cause the vibration heating of air in the cavity, thereby reach catabiotic purpose., also have part sound to enter the porous structure of material internal herein, reach the effect of sound absorption at material internal generation physical action.
The waterproof and dampproof layer design of paper substrate acoustic absorbant: have two kinds of methods to be applied in this layer design, a kind of method is a benzene emulsion, is about to the porous paper sill and floods in water and benzene emulsion are the emulsion of 1: 1 ratio earlier; Other method is to flood in the waterproof slurry, and the waterproof slurry is made up of cement, water-proofing agent etc.The used waterproof slurry of the present invention is made up of portland cement, expanded perlite, propyl benzene emulsion, mekralon, gas-development agent, water-proofing agent and water,
Strength of materials design: prepare the foamed cement mortar of different denseness by different water cement ratio, this sand-cement slurry is formed and is comprised expanded perlite, portland cement, gas-development agent etc., and preparation technology as shown in Figure 1.And measure their 3d, 7d, 28d intensity respectively, and can see increase from Fig. 2 and Fig. 3 along with water cement ratio, resistance to compression and rupture strength present the trend of successively decreasing.
The acoustical absorption coefficient design: with the foam mortar cast paper substrate porous plate of different match ratios, by the degree of uniformity of the covering of foam slurry on refill, the intensity that refers again to each different mixture ratio is determined best match ratio.The measurement of acoustic absorbant acoustical absorption coefficient has two kinds of Reverberation room method and standing-wave-tube methods usually.The present invention adopts standing-wave-tube method, promptly measures the acoustical absorption coefficient α of sound wave when the material surface vertical direction is propagated.Acoustical absorption coefficient under two water cement ratio shown in Figure 4 can be seen the acoustical absorption coefficient equilibrium under different frequency from table, the acoustical absorption coefficient under each frequency is all greater than 0.45, and wherein the average sound absorption coefficient under 0.55 water cement ratio reaches more than 0.6.
The invention has the beneficial effects as follows, improve the acoustically effective of low, the intermediate frequency range of acoustic absorbant, also can improve assimilation effect simultaneously, make material obvious for each frequency acoustically effective of noise to high frequency sound wave.Simultaneously, utilize prefabricated porous cardboard to prepare acoustic absorbant, acoustic absorbant preparation technology is simplified.
Description of drawings
Fig. 1 is foamed cement mortar preparation technology figure of the present invention
Fig. 2 is the water cement ratio and anti-folding graph of a relation of micropore sand-cement slurry of the present invention
Fig. 3 is the water cement ratio and the resistance to compression graph of a relation of micropore sand-cement slurry of the present invention
Fig. 4 is the acoustical absorption coefficient curve map under two water cement ratio of the present invention
Fig. 5 paper substrate sound-absorbing porous material photo in kind
Fig. 6 paper substrate porosint structural representation.
The preparation technology of foamed cement mortar shown in Figure 1 is in the setting weight ratio, and common 42.5 portland cements, expanded perlite, fiber, additive are joined in the leaflet low-speed mixer and stir, and the foaming mixed serum that stirs flows into mould molding.
Embodiment
Adopt following starting material, by aforesaid preparation method, the preparation water cement ratio is 0.50 and 0.55 paper substrate acoustic absorbant:
Starting material: 1, prefabricated porous paper substrate;
2, benzene emulsion and water-proofing agent;
3, expanded perlite and portland cement;
4, mekralon.
The above-mentioned raw material preparing water cement ratio of embodiment 1 usefulness is that 0.50 paper substrate acoustic absorbant is formed and The performance test results is listed in table 2
The above-mentioned raw material preparing water cement ratio of embodiment 2 usefulness is that 0.55 paper substrate acoustic absorbant is formed and The performance test results is listed in table 3
The kind of the main acoustic absorbant of table 1
| Title | Example | Main sound absorption characteristics |
| Porosint | Mineral wool, glass wool, polyfoam, felt | The medium-high frequency sound-absorbing is good, and the chamber of leaving a blank behind can also absorb low frequency |
| Board-like material | Scale board, eternit, plasterboard, hard fiber board | Low frequency absorbs better |
| Perforated plate | Gummed, eternit, gypsum, the sheet metal of perforation | Intermediate frequency absorbs better |
| Absorbing ceiling | Abatvoixs such as mineral wool, glass cotton, soft fibre | Ventilative same porosint, air-locked same sheet material |
| Film material | Plastic sheeting, canvas, leatheret | Absorb medium and low frequency |
| Flexible material | Sponge, latex piece | Pore is not communicated with, and shaking by it absorbs intermediate frequency selectively |
The paper substrate acoustic absorbant of table 2 water cement ratio 0.50 is formed and The performance test results
| Foam mortar is formed | Performance test | ||||
| Resistance to compression (MPa) | Anti-folding (MPa) | Average sound absorption coefficient α | |||
| Cement | Water | Perlite | 17.4 | 4.52 | 0.583 |
| 1∶0.5∶0.05 | |||||
The paper substrate acoustic absorbant of table 3 water cement ratio 0.55 is formed and The performance test results
| Foam mortar is formed | Performance test | ||||
| Resistance to compression (MPa) | Anti-folding (MPa) | Average sound absorption coefficient α | |||
| Cement | Water | Perlite | 20.0 | 4.44 | 0.601 |
| 1∶0.55∶0.075 | |||||
Claims (3)
1, a kind of porous preforming paper substrate acoustic absorbant, it is characterized in that this material is made up of porous substrate made of paper and water proof type foam cement slurry overlayer, the external diameter of a circle in the hole of described porous substrate made of paper is 1mm to 50mm, described water proof type foam cement slurry overlayer is a porous light-weight aggregate cement slurry overlayer, by portland cement, expanded perlite, the propyl benzene emulsion, mekralon, gas-development agent, water-proofing agent and water are formed, and each composition was counted by weight during it was formed: 100 parts of portland cements, 1～10 part of expanded perlite, 5～10 parts of propyl benzene emulsions, 0.1～0.5 part of mekralon, 1～2 part of gas-development agent, 1～5 part of water-proofing agent, 40～60 parts in water.
2, acoustic absorbant as claimed in claim 1 is characterized in that described porous substrate made of paper is the triangle of the scraps of paper formation of grafting mutually or the material of polygon through hole array cavity structure, and the external diameter of a circle of its triangle or polygon is 5mm to 15mm.
3, the preparation method of the described paper substrate acoustic absorbant of claim 1 is characterized in that preparation process is as follows:
1) the paper substrate porous substrate is the preparation of Paper base hollow cavity plate, and with yellow plate paper sheet grafting triangularity or polygon through hole array, its triangle or polygonal circumscribed circle diameter are 1mm to 50mm,
2) with portland cement, expanded perlite, propyl benzene emulsion, mekralon, gas-development agent, water-proofing agent and water, join in the stirring machine in the ratio of setting, stirred 1～5 minute, to make good fluidity a large amount of evenly slurries of bubble are arranged,
3) the Paper base hollow cavity plate slurry that places step (2) to be prepared that will select size floods, and make cement slurry wrap cardboard fully, but do not seal the hole of refill material,
4) the Paper base hollow cavity plate that flooded cement slurry vertically is placed on the flat board by hole, allow the part slurry under action of gravity, flow to the bottom, make the hole sealing of porous plate bottom or semiclosed, original like this through hole refill material becomes blind hole or half-blindness orifice plate
5) maintenance under normal temperature, 50%～80% relative humidity of step (4) gained paper substrate cement slurry compound substance was promptly got spendable paper substrate acoustic absorbant more than 20 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128220 CN1236419C (en) | 2003-06-27 | 2003-06-27 | High-efficiency paper base sound-absorbing material and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128220 CN1236419C (en) | 2003-06-27 | 2003-06-27 | High-efficiency paper base sound-absorbing material and preparation thereof |
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| Publication Number | Publication Date |
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| CN1472725A CN1472725A (en) | 2004-02-04 |
| CN1236419C true CN1236419C (en) | 2006-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03128220 Expired - Fee Related CN1236419C (en) | 2003-06-27 | 2003-06-27 | High-efficiency paper base sound-absorbing material and preparation thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103147520A (en) * | 2013-03-13 | 2013-06-12 | 南昌航空大学 | Method for fabricating light sound absorption and insulation core board with waste slag powder modified micro-foam grains |
| CN104994461B (en) | 2015-07-03 | 2019-07-05 | 歌尔股份有限公司 | Sound-absorbing particle and its processing method and loudspeaker mould group and its packaging method |
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