CN114573901B - Sound insulation material composition and sound insulation sheet - Google Patents
Sound insulation material composition and sound insulation sheet Download PDFInfo
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- CN114573901B CN114573901B CN202011374941.3A CN202011374941A CN114573901B CN 114573901 B CN114573901 B CN 114573901B CN 202011374941 A CN202011374941 A CN 202011374941A CN 114573901 B CN114573901 B CN 114573901B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The present invention relates to a sound insulating material composition and a sound insulating sheet. The soundproof material composition includes: 15-25 parts by weight of polyolefin elastomer, 70-80 parts by weight of inorganic filler; the polyolefin elastomer comprises a first polyolefin elastomer and a second polyolefin elastomer, wherein the melting point of the first polyolefin elastomer is higher than 90 ℃, the melting point of the second polyolefin elastomer is lower than 90 ℃, the melt index of the second polyolefin elastomer is lower than 1g/10min, and the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is (2-3): 1. The sound-insulating sheet material prepared from the sound-insulating material composition has high-temperature resistance and low-temperature resistance, and has high density, meets the sound-insulating performance requirement of the sound-insulating sheet material, and has good sound-insulating performance.
Description
Technical Field
The invention relates to the field of sound insulation materials, in particular to a sound insulation material composition and a sound insulation sheet.
Background
In the field of sound insulation materials, it is generally required that sound insulation sheets are subjected to high-temperature baking at about 180-200 ℃ for plastic suction molding, and at the same time, the shape of the product can be kept stable at 90 ℃. However, the sound insulation material in the prior art is difficult to achieve the balance between high temperature resistance and low temperature resistance. In addition, the high density soundproof material requires the addition of a large amount of filler to obtain a high density, and the presence of a large amount of filler deteriorates the low temperature performance, and the soundproof material is easily brittle at a temperature of-20 ℃.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a sound insulation material composition and a sound insulation sheet, wherein the sound insulation sheet prepared from the sound insulation material composition has high density, meets the sound insulation performance requirement of the sound insulation sheet, and has good sound insulation performance.
A first aspect of the present invention provides a soundproofing material composition comprising: 15-25 parts by weight of polyolefin elastomer, 70-80 parts by weight of inorganic filler; the polyolefin elastomer comprises a first polyolefin elastomer and a second polyolefin elastomer, wherein the melting point of the first polyolefin elastomer is higher than 90 ℃, the melting point of the second polyolefin elastomer is lower than 90 ℃, the melt index of the second polyolefin elastomer is lower than 1g/10min, and the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is (2-3): 1.
Preferably, the melt index of the first polyolefin elastomer is from 1 to 3g/10min.
Preferably, the inorganic filler includes at least one of mica, barium sulfate, aluminum hydroxide, and calcium carbonate.
Preferably, the inorganic filler includes 5 to 10 parts by weight of mica, 0 to 50 parts by weight of barium sulfate, 0 to 30 parts by weight of aluminum hydroxide, and 0 to 40 parts by weight of calcium carbonate.
Preferably, the soundproofing material composition further includes at least one of a plasticizer, a coupling agent, and a lubricant, wherein the plasticizer is 1 to 5 parts by weight, the coupling agent is 0.1 to 2 parts by weight, and the lubricant is 0.1 to 2 parts by weight.
Preferably, the plasticizer includes at least one of paraffin oil, epoxidized oil, and liquid polyester. Preferably, the coupling agent includes at least one of a titanate coupling agent, an aluminate coupling agent, and a silane coupling agent.
Preferably, the lubricant includes at least one of metal stearates, amides, and polyethylene waxes.
A second aspect of the present invention provides a sound-insulating sheet obtained by banburying, extruding and tabletting the aforementioned sound-insulating material composition.
Preferably, the conditions of the banburying include: the banburying temperature is 130-180 ℃ and the banburying time is 15-60min; the extrusion temperature is 100-160 ℃.
According to the sound insulation material composition, the high-temperature resistance and the low-temperature resistance of the sound insulation sheet prepared from the sound insulation material composition are achieved through controlling the synergistic effect between the high-melting-point first polyolefin elastomer and the low-melting-point second polyolefin elastomer in a specific weight ratio, the density is high, the sound insulation performance requirement of the sound insulation sheet is met, and the sound insulation performance is good.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The present invention provides a soundproof material composition comprising: 15-25 parts by weight of polyolefin elastomer, 70-80 parts by weight of inorganic filler; the polyolefin elastomer comprises a first polyolefin elastomer and a second polyolefin elastomer, wherein the melting point of the first polyolefin elastomer is higher than 90 ℃, the melting point of the second polyolefin elastomer is lower than 90 ℃, the melt index of the second polyolefin elastomer is lower than 1g/10min (190 ℃,2.16 kg), and the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is (2-3): 1.
According to the sound insulation material composition, the high-temperature resistance and the low-temperature resistance of the sound insulation sheet prepared from the sound insulation material composition are achieved through controlling the synergistic effect between the high-melting-point first polyolefin elastomer and the low-melting-point second polyolefin elastomer in a specific weight ratio, the density is high, the sound insulation performance requirement of the sound insulation sheet is met, and the sound insulation performance is good. If the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is not within the range of (2-3): 1, i.e., the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer exceeds 3:1, the low temperature resistance of the product may be lowered; if the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is less than 2:1, the high temperature resistance of the product is lowered. If the melt index of the second polyolefin elastomer is more than 1g/10min, it may result in a decrease in low temperature resistance of the product.
In some embodiments, to further improve the processability of the sound barrier material composition, it is preferred that the first polyolefin elastomer has a melt index of 1 to 3g/10min (190 ℃,2.16 kg). If the melt index of the first polyolefin elastomer is less than 1g/10min, the processing process of the soundproof material composition extruded in an internal mixer may be deteriorated; if the melt index of the first polyolefin elastomer is more than 3g/10min, it may result in deterioration of the deep processability in the later stage of the product.
In some embodiments, the inorganic filler includes at least one of mica, barium sulfate, aluminum hydroxide, and calcium carbonate. The inorganic filler can enhance the mechanical properties of the sound-insulating sheet material prepared from the sound-insulating material composition. Preferably, the inorganic filler includes 5 to 10 parts by weight of mica, 0 to 50 parts by weight of barium sulfate, 0 to 30 parts by weight of aluminum hydroxide, and 0 to 40 parts by weight of calcium carbonate. In order to further improve the sound-insulating effect and flame retardancy of the sound-insulating sheet made of the sound-insulating material composition, it is preferable that the inorganic filler includes 5 to 10 parts by weight of mica, 10 to 40 parts by weight of barium sulfate, 10 to 20 parts by weight of aluminum hydroxide, and 10 to 30 parts by weight of calcium carbonate.
In some embodiments, the sound barrier material composition further comprises at least one of a plasticizer, a coupling agent, and a lubricant. The plasticizer, the coupling agent and the lubricant may improve the processability of the soundproofing material composition, and the kinds and amounts of the plasticizer, the coupling agent and the lubricant are within the conventional range in the art. Preferably, the plasticizer comprises at least one of paraffin oil, epoxidized oil and liquid polyester, and the amount of the plasticizer is 1 to 5 parts by weight; the coupling agent comprises at least one of titanate coupling agent, aluminate coupling agent and silane coupling agent, and the dosage of the coupling agent is 0.1-2 parts by weight; the lubricant includes at least one of metal stearates, amides, and polyethylene waxes, for example, the metal stearates may be zinc stearate, magnesium stearate, etc., and the amides may be fatty acid amides; the lubricant is used in an amount of 0.1 to 2 parts by weight.
The invention also provides a sound-insulating sheet material, which is obtained by banburying, extruding and tabletting the sound-insulating material composition. The sound insulation sheet material has high temperature resistance and low temperature resistance, and has high density, meets the sound insulation performance requirement of the sound insulation sheet material, and has good sound insulation performance.
In some embodiments, the conditions of the banburying include: the banburying temperature is 130-180 ℃ and the banburying time is 15-60min; the extrusion temperature is 100-160 ℃.
The present invention will be described in detail by way of examples, but the present invention is not limited to the following examples.
Example 1
(1) Referring to Table 1, 12kg of a first polyolefin elastomer (LG chemical LC100 having a melting point of 96 ℃ C., a melt index of 1.2 g/10 min), 6kg of a second polyolefin elastomer (Dow chemical 8150 having a melting point of 56 ℃ C., a melt index of 0.5 g/10 min), 40kg of barium sulfate, 13kg of calcium carbonate, 5kg of mica, 20kg of aluminum hydroxide, 2kg of paraffin oil and 1kg of zinc stearate, 1kg of aluminate coupling agent were weighed and put together in an internal mixer for internal mixing at a temperature of 150 ℃ C., and for a time of 30min;
(2) And (3) placing the mixed material subjected to banburying in the step (1) in an extruder, extruding and tabletting, wherein the extruding temperature is 150 ℃, and the thickness of the obtained sound-insulating sheet A1 after extrusion and tabletting is 2mm.
Example 2
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemi LC100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 13.5 kg and the amount of the second polyolefin elastomer (dow chemi 8150, melting point 56 ℃ c., melt index 0.5 g/10 min) was 4.5kg; the sound insulation sheet A2 of example 2 was prepared, and the thickness of A2 was 2mm.
Example 3
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemi LC100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 10kg, the amount of the second polyolefin elastomer (dow chemi 8150, melting point 56 ℃ c., melt index 0.5 g/10 min) was 5kg, and the amount of calcium carbonate was 16kg; the sound insulation sheet A3 of example 3 was prepared, and the thickness of A3 was 2mm.
Example 4
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemi LC100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 16kg, the amount of the second polyolefin elastomer (dow chemi 8150, melting point 56 ℃ c., melt index 0.5 g/10 min) was 8kg, the amount of mica was 8kg, the amount of barium sulfate was 34kg, and the amount of calcium carbonate was 10kg; the sound insulation sheet A4 of example 4 was prepared with a thickness of A4 of 2mm.
Example 5
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the first polyolefin elastomer was: KF271, melting point 98℃and melt index 2.4g/10min; the sound insulation sheet A5 of example 5 was prepared with a thickness of 2mm A5.
Example 6
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the first polyolefin elastomer was: LF300, melting point of 101 ℃ and melt index of 3.0g/10min; the sound insulation sheet A6, A6 of example 6 was prepared to have a thickness of 2mm.
Example 7
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the first polyolefin elastomer was: LF090 with melting point of 95 ℃ and melt index of 0.8g/10min; the sound insulation sheet A7 of example 7 was prepared, and the thickness of A7 was 2mm.
Example 8
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the first polyolefin elastomer was: LF600, melting point of 99 ℃ and melt index of 6g/10min; the sound insulation sheet A8 of example 8 was prepared, and the thickness of A8 was 2mm.
Comparative example 1
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemi LC100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 14.4 kg and the amount of the second polyolefin elastomer (dow chemi 8150, melting point 56 ℃ c., melt index 0.5 g/10 min) was 3.6kg; the sound-insulating sheet D1 of comparative example 1 was prepared, and the thickness of D1 was 2mm.
Comparative example 2
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemlc 100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 9kg and the amount of the second polyolefin elastomer (dow chem 8150, melting point 56 ℃ c., melt index 0.5 g/10 min) was 9kg; the sound-insulating sheet D2 of comparative example 2 was prepared, and the thickness of D2 was 2mm.
Comparative example 3
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the amount of the first polyolefin elastomer (LG chemical LC100, melting point 96 ℃ c., melt index 1.2 g/10 min) was 18 kg, and the second polyolefin elastomer was not added; the sound-insulating sheet D3 of comparative example 3 was prepared, and the thickness of D3 was 2mm.
Comparative example 4
A sound-insulating sheet was produced in the same manner as in example 1 except that in step (1), the second polyolefin elastomer was: LC670 with melting point of 58 ℃ and melt index of 5.0g/10min; the sound-insulating sheet D4 of comparative example 4 was prepared, and the thickness of D4 was 2mm.
TABLE 1
Performance testing
The processing technology performance is as follows: the difficulty of extrusion molding of the product, wherein, the priority indicates no abnormal material breakage in the extrusion process and the sheet is flat; good means that the extrusion process is basically smooth, and unstable saw teeth appear at the edge; the difference indicates that sheet breakage occurred during extrusion.
Density: the formula density ρ=w1×ρ is used according to the weight of the sample in air w1 and the mass of the sample in water w2 Water and its preparation method /(w1-w2)。
High temperature processability: baking at 180deg.C for 4min, and observing whether the product is melted or broken when pulled; if the product is not melted and broken, OK; the product melts or breaks, NG.
Low temperature bending resistance: -20 ℃, holding for 2 hours and bending at 180 ℃ at the temperature to observe whether the product is brittle; if the product is not broken, OK; and (5) embrittling the product, and NG.
High temperature resistance: observing whether the product is obviously deformed or softened at 90 ℃ for 200 hours; the product is not deformed or softened, and OK is carried out; the product is deformed or softened and NG.
DMA loss modulus peak: the DMA Q800, the temperature of minus 100 ℃ to 100 ℃ and the double cantilever beam mode, the lower the temperature shown by the DMA loss modulus peak value, the better the low temperature resistance of the product.
TABLE 2
As can be seen from the results of the examples and the comparative examples in Table 2, the sound-insulating sheet material prepared from the sound-insulating material composition provided by the invention has high density, high heat resistance and low temperature resistance, meets the sound-insulating performance requirement of the sound-insulating sheet material, and has good sound-insulating performance; from the results of examples 1 and examples 7 to 8, it is understood that by further controlling the melt index of the first polyolefin elastomer, the processability of the soundproof material composition in the process of producing soundproof sheets can be further improved, and the high-temperature processability of the soundproof sheets can be improved. Compared with the examples, the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer of comparative examples 1 to 3 is not within the scope of the present application, which cannot simultaneously achieve both high temperature resistance and low temperature resistance, and the second melt index of comparative example 4 is not within the scope of the present application, which cannot simultaneously achieve both high temperature resistance and low temperature resistance.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (9)
1. A sound insulation material composition comprising: 15-25 parts by weight of polyolefin elastomer, 70-80 parts by weight of inorganic filler; the polyolefin elastomer comprises a first polyolefin elastomer and a second polyolefin elastomer, wherein the melting point of the first polyolefin elastomer is higher than 90 ℃, the melting point of the second polyolefin elastomer is lower than 90 ℃, the melt index of the second polyolefin elastomer is lower than 1g/10min, and the weight ratio of the first polyolefin elastomer to the second polyolefin elastomer is (2-3): 1; the melt index of the first polyolefin elastomer is 1-3g/10min; the melt index was measured at 190℃under 2.16kg.
2. The sound insulating material composition according to claim 1, wherein the inorganic filler comprises at least one of mica, barium sulfate, aluminum hydroxide, and calcium carbonate.
3. The soundproofing material composition according to claim 2, wherein the inorganic filler comprises 5 to 10 parts by weight of mica, 0 to 50 parts by weight of barium sulfate, 0 to 30 parts by weight of aluminum hydroxide, and 0 to 40 parts by weight of calcium carbonate.
4. The sound insulating material composition according to claim 1, further comprising at least one of a plasticizer, a coupling agent, and a lubricant, wherein the plasticizer is 1 to 5 parts by weight, the coupling agent is 0.1 to 2 parts by weight, and the lubricant is 0.1 to 2 parts by weight.
5. The sound insulating material composition according to claim 4, wherein the plasticizer comprises at least one of paraffin oil, epoxidized oil, and liquid polyester.
6. The sound insulating material composition according to claim 4, wherein the coupling agent comprises at least one of a titanate coupling agent, an aluminate coupling agent, and a silane coupling agent.
7. The sound insulating material composition according to claim 4, wherein the lubricant comprises at least one of metallic soaps of stearic acid, amides, and polyethylene wax.
8. A sound-insulating sheet obtained by banburying, extruding and tabletting the sound-insulating material composition according to any one of claims 1 to 7.
9. The sound-insulating sheet material according to claim 8, wherein the conditions of the banburying include: the banburying temperature is 130-180 ℃ and the banburying time is 15-60min; the extrusion temperature is 100-160 ℃.
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| CN104817809A (en) * | 2015-05-12 | 2015-08-05 | 上海华特汽车配件有限公司 | Elastomer granules for producing automobile sound-insulation pad surface leather and preparation method thereof |
| JP2017122138A (en) * | 2016-01-05 | 2017-07-13 | 住友化学株式会社 | Vibration energy absorption composition and article made from the same |
| CN107556687A (en) * | 2017-09-06 | 2018-01-09 | 上汽通用汽车有限公司 | The puigging and sound insulating pad and preparation method of a kind of sound insulating pad |
| CN111762108A (en) * | 2019-04-02 | 2020-10-13 | 上海汽车集团股份有限公司 | Sound insulation pad and manufacturing method thereof |
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