CN1288203C - Method for preparing organic polymer/inorganic mineral composite foamed sound-absorbing material - Google Patents
Method for preparing organic polymer/inorganic mineral composite foamed sound-absorbing material Download PDFInfo
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- CN1288203C CN1288203C CN 200510042906 CN200510042906A CN1288203C CN 1288203 C CN1288203 C CN 1288203C CN 200510042906 CN200510042906 CN 200510042906 CN 200510042906 A CN200510042906 A CN 200510042906A CN 1288203 C CN1288203 C CN 1288203C
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Abstract
The present invention relates to a preparation method for an organic polymer/inorganic mineral composite foamed sound absorbing material. First, 20 to 50% of resin, 0 to 50% of rubber, 20 to 60% of inorganic mineral, 3 to 5% of foaming agent, 0.5 to 3% of flame retardant and 1 to 4% of stabilizer are stirred and uniformly mixed according to mass percentages; second, the mixture is mixed for 5 to 20 minutes by a mixing roll at the temperature of 90 to 140 DEG C to be made into a required blank body; finally, the made blank body is chemically foamed in a baking oven for 5 to 15 minutes at the temperature of 150 to 220 DEG C. The preparation method improves sound absorbing performance within the ranges of medium and low frequencies according to the principle that different polymers and different inorganic matter have different responses to sound frequencies by adopting the blending method of multicomponent polymers and inorganic matter and the advantages of organic and inorganic materials.
Description
Technical field
The present invention relates to a kind of preparation method of sound-absorbing material, particularly a kind of preparation method that can obviously improve the organic polymer/inorganic mineral composite foamed sound-absorbing material of medium and low frequency sound absorbing capabilities.
Background technology
Sound pollution is polluted with atmospheric pollution, water, has become contemporary world three overall situation public hazards.The control sound pollution has become the environmental problem of being badly in need of solution, and utilizes sound-absorbing porous material sound absorption, noise reduction to become present major technology means.
Present sound-absorbing material mainly contains three major types, i.e. inorganic porous material such as micropore glass cloth, foamed metal, mineral wool etc., organic foam polymkeric substance such as porous plastics, sponge etc., and organic/inorganic composite porous material.Yet, though the inorganic porous material mechanical property is better, its low frequency absorption performance ideal, but sound absorbing capabilities is not ideal enough in the high frequency scope, be difficult for construction, and inorganic fibre class sound-absorbing material easily is scattered, and human body and environment are caused certain harm, is not suitable for being applied to environment and health conditions requiring than higher place.Sound absorbing capabilities is good in the synthetic organic foam polymkeric substance centering high-frequency range, and range of application is wider, but acoustically effective is not obvious in this class material low-frequency range, and mechanical property is also not ideal enough.And the organic/inorganic composite sound-absorbing material is the novel sound-absorbing material of a class, it is the new research direction of sound-absorbing material, have the advantage of inorganic sound-absorbing material and organic foam sound-absorbing material concurrently, the two compound acquisition to all being arranged in high frequency, intermediate frequency and the low-frequency range, the high-strength material of efficient sound absorbing capabilities is become main goal in research to satisfy actual application requiring.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material, sound-absorbing material according to preparation method's preparation of the present invention is the foamed sound-absorbing material of the controlled three-dimensional net structure of a kind of porosity, pore size and distribution thereof and ventilate rate, has suitable wide frequency range, the characteristics that the medium and low frequency sound absorption coefficient is high.
For achieving the above object, the technical solution used in the present invention is: at first by mass percentage 20～50% resin, 0～50% rubber, 20～60% inorganic mineral, 3～5% whipping agent, 0.5～3% fire retardant and 1～4% stablizer are mixed; Above-mentioned mixture was being made required base substrate in mixing 8～20 minutes under 90～130 ℃ of temperature on the mixing roll; With the base substrate made in baking oven under 160～205 ℃ of temperature chemical foaming got final product in 5～12 minutes.
Resin of the present invention is polyvinyl chloride, polypropylene, polyethylene or polystyrene; Rubber is ethylene-propylene rubber(EPR), paracril or isoprene-isobutylene rubber; Inorganic mineral is rock wool, pearlstone, mineral wool or glass wool; Whipping agent is Cellmic C 121, N, N-dinitroso five methyne tetramines or 4,4 one bis oxide benzol sulfohydrazides; Fire retardant is magnesium hydroxide, aluminium hydroxide or triphenylphosphate; Stablizer is dibutyl tin laurate, thiol-butyl tin, mercaptan antimony composite thermal stabilizer or L518 serial rare-earth multifunctional heating stablizer.
The present invention adopts multicomponent polymeric, inorganics blend method according to different polymkeric substance, the inorganics principle different to the response of sound frequency, has improved sound absorbing capabilities in the medium and low frequency scope thereby have advantage organic, inorganic materials concurrently.This sound-absorbing material is the novel foam sound-absorbing material of the controlled three-dimensional net structure of a kind of porosity, pore size and distribution thereof and ventilate rate, has suitable wide frequency range, medium and low frequency sound absorption coefficient height, excellent flame, thermal insulation, humidity resistance, wholesomeness, cost is low and processability good, but and secondary processing advantages such as (as cutting out), can be widely used in place or environment that arenas, meeting room, music hall, recording studio, gymnasium, motorway etc. need sqouynd absorption lowering noise.
Description of drawings
Fig. 1 be adopt sound-absorbing material that preparation method of the present invention makes when different thickness to the influence of sound absorption coefficient, wherein X-coordinate is a frequency noise, ordinate zou is a sound absorption coefficient;
Fig. 2 adopts that rubber consumption is to the influence of foam sound absorbing capabilities in the sound-absorbing material that preparation method of the present invention makes, and wherein X-coordinate is a frequency noise, and ordinate zou is a sound absorption coefficient;
Fig. 3 adopts that inorganic mineral content is to the influence of sound absorption coefficient in the sound-absorbing material that preparation method of the present invention makes, and wherein X-coordinate is a frequency noise, and ordinate zou is a sound absorption coefficient.
Embodiment
Embodiment 1: at first by mass percentage the ethylene-propylene rubber(EPR) (EPR) of 20% polyvinyl chloride (PVC) and 50%, 23% rock wool, 3% Cellmic C 121,0.5% magnesium hydroxide and 3.5% dibutyl tin laurate are mixed; Above-mentioned mixture was being made required base substrate in mixing 20 minutes under 90 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 200 ℃ of temperature chemical foamings in baking oven in 5 minutes.
Embodiment 2: at first by mass percentage with 50% polypropylene (PP) and 40% pearlstone, 5% N, N-dinitroso five methyne tetramines, 1% aluminium hydroxide and 4% thiol-butyl tin mix; Above-mentioned mixture was being made required base substrate in mixing 15 minutes under 130 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 205 ℃ of temperature chemical foamings in baking oven in 10 minutes.
Embodiment 3: at first by mass percentage the isoprene-isobutylene rubber (IIR) of 30% polyethylene (PE) and 5%, 60% mineral wool, 3% 4,4 one bis oxide benzol sulfohydrazides, 1% triphenylphosphate and 1% mercaptan antimony composite thermal stabilizer are mixed; Above-mentioned mixture was being made required base substrate in mixing 15 minutes under 110 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 160 ℃ of temperature chemical foamings in baking oven in 10 minutes.
Embodiment 4: at first by mass percentage the ethylene-propylene rubber(EPR) (EPR) of 40% polystyrene (PS) and 32%, 20% glass wool, 4% Cellmic C 121,2% magnesium hydroxide and 2% L518 serial rare-earth multifunctional heating stablizer are mixed; Above-mentioned mixture was being made required base substrate in mixing 8 minutes under 130 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 200 ℃ of temperature chemical foamings in baking oven in 9 minutes.
Embodiment 5: at first by mass percentage with 25% polyvinyl chloride (PVC) and 19% paracril (NBR), 47% rock wool, 3% N, N-dinitroso five methyne tetramines, 3% aluminium hydroxide and 3% dibutyl tin laurate mix; Above-mentioned mixture was being made required base substrate in mixing 12 minutes under 130 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 205 ℃ of temperature chemical foamings in baking oven in 8 minutes.
Embodiment 6: at first by mass percentage the isoprene-isobutylene rubber (IIR) of 35% polystyrene (PS) and 27%, 30% glass wool, 4% 4,4 one bis oxide benzol sulfohydrazides, 2% triphenylphosphate and 2% thiol-butyl tin are mixed; Above-mentioned mixture was being made required base substrate in mixing 13 minutes under 110 ℃ of temperature on the mixing roll; The base substrate of making was got final product at 160 ℃ of temperature chemical foamings in baking oven in 12 minutes.
Referring to Fig. 1, among the figure ▲, ●, the sound absorbing capabilities of ■ organic polymer/inorganic mineral matrix material when representative thickness is 8mm, 10mm and 12mm respectively.As can be seen from Figure 1, when thickness hour, sound absorption coefficient is higher during high frequency, and sound absorption coefficient is lower during low frequency, along with the increase of thickness, sound absorption coefficient descends and the low frequency absorption coefficient rises gradually gradually during high frequency.It mainly is to cause the cause that specific acoustic resistance is different because thickness is different.
Referring to Fig. 2, ■ among the figure, ●, ▲, to represent rubber (as EPR) consumption respectively be 0%, 5%, 10% and the sound absorbing capabilities of 15% o'clock organic polymer/inorganic mineral matrix material to .As shown in Figure 2, increase along with rubber consumption, 1000Hz is increase tendency with the acoustical absorption factor at lower frequency place, and 1000Hz compares with the foam materials that does not add rubber with the acoustical absorption factor at the upper frequency place variation tendency that tapers off, EPR can make the comprehensive sound absorbing capabilities (representing with average acoustical absorption factor) of foam materials improve, its reason is: 1. at normal temperatures, EPR is in elastomeric state, when acoustic wave action, elastic deformation can take place in itself, thereby consumes some acoustic wave energies; 2. segment on the rubber macromolecule chain and side group produce motion under acoustic wave action, and this motion is bigger at intramolecularly and/or intermolecular friction resistance, and is remarkable to the consumption of acoustic wave energy.Therefore, rubber helps the raising of the comprehensive sound absorbing capabilities of material.Because the second-order transition temperature of rubber is well below PVC, the energy that causes the motion of rubber deformation and molecule segment thereof is relatively low, therefore, and within the specific limits, the increase of rubber consumption in the matrix material makes the acoustical absorption factor at relatively low frequency place improve comparatively obvious.But be not that rubber consumption is big more, the comprehensive sound absorbing capabilities of material is good more, because when the EPR consumption is too big, can cause in the foaming process system viscosity too small, quick decomposition along with whipping agent, foamed gas increases rapidly, and the abscess growth is steeped also attenuation rapidly of wall rapidly, cause adjacent abscess to take place and the bubble phenomenon, foam structure worsens, and causes porosity to descend, and the material sound absorbing capabilities also decreases.When and steep and also can cause abscess to subside when serious, cause the porosity of material sharply to descend, have a strong impact on the sound absorbing capabilities of material.
Referring to Fig. 3, ■, ●, ▲ to represent inorganic mineral (as rock wool) consumption respectively be the sound absorbing capabilities of 35%, 45%, 55% o'clock organic polymer/inorganic mineral matrix material.As shown in Figure 3, rock wool is that 45% comprehensive sound absorbing capabilities is better; With the increase of rock wool consumption, in the scope below 800Hz, sound absorption coefficient is increases the trend that afterwards reduces earlier, increases progressively trend and be substantially in the scope more than the 800Hz.This is that the effect of rock wool in this system has two kinds: one, because itself has good sound absorbing capabilities, its adding can bring the raising of sound absorbing capabilities undoubtedly by the decision of the character of rock wool; Two, rock wool is again an inorganic fibre, it add the increase that affiliation brings foaming melt viscosity and hardness, making foaming be difficult to carry out, moreover it is difficult for homogenizing when mixing, make phase interface contact variation, this not only can make gas that whipping agent decomposes along the rock wool fibers goods of overflowing, and causes voidage to reduce, thereby causes the decline of sound absorbing capabilities, and the bigger bubble of easy formation, cause goods to subside, surface irregularity influences apparent mass.Therefore, rock wool mainly is to see that above-mentioned this occupy an leading position to that side in the contradiction to the influence of material sound absorbing capabilities.The possibility of result is the result of the different voidage brought of different rock wool consumptions among Fig. 3.
Table 1 is the contrast of sound absorbing capabilities and the foam of polymers and the mineral sound absorbing capabilities of organic polymer/inorganic mineral composite sound-absorbing material
| Title material | Thickness/cm | Sound absorption coefficient under each frequency (Hz) | Average sound absorption coefficient | ||||
| 250 | 500 | 1000 | 2000 | 4000 | |||
| A phenol formaldehyde foam polyurethane foam | 2 2 2.5 | 0.15 0.1 0.07 | 0.52 0.26 0.11 | 0.6 0.55 0.16 | 0.78 0.52 0.31 | 0.81 0.62 0.83 | 0.572 0.41 0.296 |
| Rock wool C polyethers vinyl foam | 2.5 1 1 | 0.09 0.08 0.04 | 0.24 0.13 0.06 | 0.57 0.23 0.08 | 0.93 0.44 0.18 | 0.97 0.75 0.29 | 0.56 0.326 0.13 |
A, C are the organic polymer/inorganic mineral composite sound-absorbing material that utilizes the present invention to prepare
In order to check the quality of gained material sound absorbing capabilities of the present invention, the sound absorbing capabilities of itself and some other sound-absorbing material is compared, as shown in table 1.As can be seen from Table 1, the sound absorbing capabilities of gained materials A of the present invention, C is better than other foamed polymer materials and inorganic mineral rock wool when same thickness, particularly the medium and low frequency sound absorbing capabilities is very high: in 250～500Hz scope, sound absorption coefficient almost is 2 times of other materials.Under the same terms, its sound absorption average sound absorption coefficient is also much higher than other materials.As seen, gained sound-absorbing material of the present invention is a kind of sound absorption coefficient height, the good novel sound-absorbing material of sound absorbing capabilities.
Pore size and distribution, porosity and the open pore rate of the sound-absorbing material that makes according to preparation method of the present invention are controlled easily, and density is low, less than 600Kg/m3, the organic and inorganic combination has the high acoustic absorption performance in wide frequency range, have higher acoustically effective in 100～2000Hz scope, and average sound absorption coefficient reaches more than 0.5, improves more than 40% than general foamed plastics, and is especially better in the low and medium frequency scope; Have higher mechanical property, compression strength is greater than 5MPa; Moulding processability is good, can be made into the goods of various complicated shapes, and cost is low, and suitability for secondary processing is good, easily cutting, constructability; Fire-retardantly, anti-go mouldy, ageing-resistant and heat resistance is good.
Claims (6)
1, a kind of preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material is characterized in that:
1) at first by mass percentage 20～50% resin, 0～50% rubber, 20～60% inorganic mineral, 3～5% whipping agent, 0.5～3% fire retardant and 1～4% stablizer are mixed;
Said inorganic mineral is rock wool, pearlstone, mineral wool or glass wool;
2) above-mentioned mixture was being made required base substrate in mixing 8～20 minutes on the mixing roll under 90～130 ℃ of temperature;
3) with the base substrate made in baking oven under 160～205 ℃ of temperature chemical foaming got final product in 5～12 minutes.
2, the preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material according to claim 1 is characterized in that: said resin is polyvinyl chloride, polypropylene, polyethylene or polystyrene.
3, the preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material according to claim 1 is characterized in that: said rubber is ethylene-propylene rubber(EPR), paracril or isoprene-isobutylene rubber.
4, the preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material according to claim 1 is characterized in that: said whipping agent is Cellmic C 121, N, N-dinitroso five methyne tetramines or 4,4 one bis oxide benzol sulfohydrazides.
5, the preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material according to claim 1 is characterized in that: said fire retardant is magnesium hydroxide, aluminium hydroxide or triphenylphosphate.
6, the preparation method of organic polymer/inorganic mineral composite foamed sound-absorbing material according to claim 1 is characterized in that: said stablizer is dibutyl tin laurate, thiol-butyl tin, mercaptan antimony composite thermal stabilizer or L518 serial rare-earth multifunctional heating stablizer.
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| US10632936B2 (en) | 2017-05-11 | 2020-04-28 | Ford Global Technologies, Llc | Extrusion grade perlite reinforced polypropylene polymer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10632936B2 (en) | 2017-05-11 | 2020-04-28 | Ford Global Technologies, Llc | Extrusion grade perlite reinforced polypropylene polymer |
| US11465570B2 (en) | 2017-05-11 | 2022-10-11 | Ford Global Technologies, Llc | Extrusion grade perlite reinforced polypropylene polymer |
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