阅读说明：本技术 一种隔音减震毡 (Sound-proof damping felt ) 是由 牟正雄 于 2020-12-03 设计创作，主要内容包括：本发明公开了一种隔音减震毡,按重量份计,制备原料包括：PVC树脂10-20份,复合橡胶30-40份,填料150-200份,阻燃剂5-10份,抑烟剂0.1-0.5份,成碳剂0.5-1份,增塑剂12-16份,分散剂0.3-0.8份,流动助剂0.1-0.5份,硬脂酸锌1-2份,稳定剂1-2份,炭黑3-8份。本发明中的隔音减震毡,其具有光泽度好、阻燃性能强、表面密度大、物理机械性能优异、耐候性能好、成本低、经济环保等特点,是一种新型的隔音减震材料。在本发明中复合橡胶的使用增加了产品的拉伸性、延展性,同时还优化了各种原材料之间的兼容性,使填料与阻燃剂等在体系中具有更好的分散,从而有效提高了产品的密度,使其具有更好的抗震、隔音、阻燃效果,扩大了产品的应用领域。(The invention discloses a sound-insulation damping felt which comprises the following preparation raw materials in parts by weight: 10-20 parts of PVC resin, 30-40 parts of composite rubber, 200 parts of filler 150-containing materials, 5-10 parts of flame retardant, 0.1-0.5 part of smoke suppressant, 0.5-1 part of carbon forming agent, 12-16 parts of plasticizer, 0.3-0.8 part of dispersing agent, 0.1-0.5 part of flow promoter, 1-2 parts of zinc stearate, 1-2 parts of stabilizer and 3-8 parts of carbon black. The sound-insulation damping felt has the characteristics of good glossiness, strong flame retardant property, large surface density, excellent physical and mechanical properties, good weather resistance, low cost, economy, environmental protection and the like, and is a novel sound-insulation damping material. The use of the composite rubber in the invention increases the stretchability and the ductility of the product, optimizes the compatibility among various raw materials, and enables the filler, the flame retardant and the like to be better dispersed in the system, thereby effectively improving the density of the product, enabling the product to have better anti-seismic, sound-insulation and flame-retardant effects, and expanding the application field of the product.)

1. The sound-insulation damping felt is characterized by comprising the following preparation raw materials in parts by weight: 10-20 parts of PVC resin, 30-40 parts of composite rubber, 200 parts of filler 150-containing materials, 5-10 parts of flame retardant, 0.1-0.5 part of smoke suppressant, 0.5-1 part of carbon forming agent, 12-16 parts of plasticizer, 0.3-0.8 part of dispersing agent, 0.1-0.5 part of flow promoter, 1-2 parts of zinc stearate, 1-2 parts of stabilizer and 3-8 parts of carbon black.

2. The sound-insulation and shock-absorption felt according to claim 1, wherein the raw materials for preparing the sound-insulation and shock-absorption felt comprise the following components in parts by weight: 15 parts of PVC resin, 35 parts of composite rubber, 175 parts of filler, 9 parts of flame retardant, 0.3 part of smoke suppressant, 0.7 part of carbon forming agent, 14 parts of plasticizer, 0.5 part of dispersant, 0.3 part of flow aid, 1.5 parts of zinc stearate, 1.5 parts of stabilizer and 5 parts of carbon black.

3. The sound-insulation shock-absorption felt according to claim 1 or 2, wherein the composite rubber is at least two of ethylene propylene rubber, ethylene propylene diene rubber, chlorosulfonated polyethylene rubber and chlorinated polyethylene rubber.

4. The sound-insulating and shock-absorbing felt according to claim 1 or 2, wherein the filler is at least one of barium sulfate, iron powder, magnesium sulfate, light calcium, talc and kaolin.

5. The sound-proofing and shock-absorbing felt according to claim 1 or 2, wherein the flame retardant is at least one of antimony trioxide, silica, magnesium oxide, magnesium hydroxide and aluminum hydroxide.

6. The sound-proofing and vibration-damping felt according to claim 1 or 2, wherein said plasticizer is at least one of phthalate, dioctyl terephthalate, polyol ester and alkyl sulfonate.

7. The sound-proofing and vibration-damping felt according to claim 1 or 2, wherein said dispersing agent is at least one of barium stearate, calcium stearate, magnesium stearate, cadmium stearate and copper stearate.

8. The acoustic shock felt according to claim 1 or 2, wherein the flow aid is an ethylene-acrylate copolymer.

9. The sound-insulating and shock-absorbing felt according to claim 1 or 2, wherein the stabilizer is a compound of stearate and at least one of an antioxidant 1010, an antioxidant 168 and an antioxidant 1076.

10. A method for preparing a soundproof and shock-absorbing felt according to any one of claims 1 to 9, comprising the steps of:

s1, heating the internal mixer to 80-120 ℃, sequentially pouring 5/7 parts by weight of the compounded rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of the compounded rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, and turning, internally mixing and discharging to obtain the sound-insulation and shock-absorption felt.

Technical Field

The invention relates to the technical field of sound-insulation and shock-absorption materials, in particular to a sound-insulation and shock-absorption felt.

Background

In real life, vibration is ubiquitous, the phenomenon of vibration is not negligible and is indispensable, people are constantly dedicated to research on generation, control and elimination of vibration, vibration of all objects can generate sound, music cannot be generated if no vibration exists, and people cannot communicate with languages. However, vibration also has many adverse effects on people's life, for example, resonance can cause damage to mechanical equipment, noise generated by automobiles, high-speed trains and the like can affect the living environment of human beings, and how to minimize the adverse effects on people caused by vibration is the direction of development and pursuit of sound insulation and vibration reduction technology.

At present, the sound insulation and shock absorption materials mainly comprise asphalt shock absorption materials, rubber shock absorption materials and water-based high polymer materials. The asphalt damping material has low price and convenient use, but the material has poor environmental protection property, and particularly, the coal tar type asphalt material supplied by many suppliers not only pollutes the environment in a vehicle, but also harms human health. Rubber and polymer damping materials are expensive, and meanwhile, the materials are poor in glossiness and low in density, so that the sound insulation and shock resistance effects are low.

The invention aims to provide a novel sound-insulation damping material, in particular to a sound-insulation damping felt. Compared with the existing sound-insulation damping material, the sound-insulation damping felt has better glossiness and flame retardance, and the surface density of the sound-insulation damping felt is larger than that of the existing material, so that the sound-insulation damping effect of the sound-insulation damping felt is more excellent, and meanwhile, the sound-insulation damping felt also has the advantages of low economic cost, environmental friendliness and the like.

Disclosure of Invention

In order to solve the problems, the invention provides a sound-insulation damping felt which comprises the following raw materials in parts by weight: 10-20 parts of PVC resin, 30-40 parts of composite rubber, 200 parts of filler 150-containing materials, 5-10 parts of flame retardant, 0.1-0.5 part of smoke suppressant, 0.5-1 part of carbon forming agent, 12-16 parts of plasticizer, 0.3-0.8 part of dispersing agent, 0.1-0.5 part of flow promoter, 1-2 parts of zinc stearate, 1-2 parts of stabilizer and 3-8 parts of carbon black.

As a preferred technical scheme, the preparation raw materials comprise the following components in parts by weight: 15 parts of PVC resin, 35 parts of composite rubber, 175 parts of filler, 9 parts of flame retardant, 0.3 part of smoke suppressant, 0.7 part of carbon forming agent, 14 parts of plasticizer, 0.5 part of dispersant, 0.3 part of flow aid, 1.5 parts of zinc stearate, 1.5 parts of stabilizer and 5 parts of carbon black.

As a preferable technical scheme, the composite rubber is at least two of ethylene propylene rubber, ethylene propylene diene monomer rubber, chlorosulfonated polyethylene rubber and chlorinated polyethylene rubber.

As a preferable technical scheme, the filler is at least one of barium sulfate, iron powder, magnesium sulfate, light calcium, talcum powder and kaolin.

As a preferable technical scheme, the flame retardant is at least one of antimony trioxide, silicon dioxide, magnesium oxide, magnesium hydroxide and aluminum hydroxide.

As a preferable technical scheme, the plasticizer is at least one of phthalate, dioctyl terephthalate, polyol ester and alkyl sulfonate.

As a preferable technical solution, the dispersant is at least one of barium stearate, calcium stearate, magnesium stearate, cadmium stearate, and copper stearate.

As a preferred technical scheme, the flow auxiliary agent is ethylene-acrylate copolymer.

As a preferable technical scheme, the stabilizing agent is a compound of at least one of an antioxidant 1010, an antioxidant 168 and an antioxidant 1076 and stearate.

The second aspect of the present invention also provides a method for preparing the soundproof and damping felt, comprising the steps of:

s1, heating the internal mixer to 80-120 ℃, sequentially pouring 5/7 parts by weight of the compounded rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of the compounded rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, and turning, internally mixing and discharging to obtain the sound-insulation and shock-absorption felt.

Advantageous effects

The sound-insulation damping felt has the characteristics of good glossiness, strong flame retardant property, large surface density, excellent physical and mechanical properties, good weather resistance, low cost, economy, environmental protection and the like, and is a novel sound-insulation damping material. The use of the composite rubber in the invention increases the stretchability and the ductility of the product, optimizes the compatibility among various raw materials, and enables the filler, the flame retardant and the like to be better dispersed in the system, thereby effectively improving the density of the product, enabling the product to have better anti-seismic, sound-insulation and flame-retardant effects, and expanding the application field of the product.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

In order to solve the problems, the invention provides a sound-insulation damping felt, which comprises the following raw materials in parts by weight: 10-20 parts of PVC resin, 30-40 parts of composite rubber, 200 parts of filler 150-containing materials, 5-10 parts of flame retardant, 0.1-0.5 part of smoke suppressant, 0.5-1 part of carbon forming agent, 12-16 parts of plasticizer, 0.3-0.8 part of dispersing agent, 0.1-0.5 part of flow promoter, 1-2 parts of zinc stearate, 1-2 parts of stabilizer and 3-8 parts of carbon black.

In some preferred embodiments, the preparation of the starting materials comprises, in parts by weight: 15 parts of PVC resin, 35 parts of composite rubber, 175 parts of filler, 9 parts of flame retardant, 0.3 part of smoke suppressant, 0.7 part of carbon forming agent, 14 parts of plasticizer, 0.5 part of dispersant, 0.3 part of flow aid, 1.5 parts of zinc stearate, 1.5 parts of stabilizer and 5 parts of carbon black.

PVC resin

In some preferred embodiments, the PVC resin has a viscosity number of 107 to 117ml/g and an average degree of polymerization of 1000 to 1150.

The inventor finds that when the viscosity number of the PVC resin is 107-117 ml/g, on one hand, the physical and mechanical properties and the processing performance of the material can be ensured, and on the other hand, the PVC resin with the viscosity number in the range of 107-117 ml/g and the ethylene-ethyl acrylate copolymer can act together to improve the dispersibility of the filler in a system. The average degree of polymerization is selected to be 1000 to 1150 because PVC resin is an amorphous linear polymer compound, and the greater the relative degree of polymerization, the better the strength, rigidity, toughness, heat resistance, and low temperature resistance of the material, but the poorer the molding processability. When the average polymerization degree is 1000-1150, the strength, rigidity, toughness, heat resistance, low temperature resistance and molding processability of the material can be balanced and are all in a better value.

Compounded rubber

In some preferred embodiments, the compounded rubber is at least two of ethylene propylene rubber, ethylene propylene diene monomer rubber, chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber.

In some more preferred embodiments, the composite rubber is ethylene propylene diene monomer rubber and chlorosulfonated polyethylene rubber.

In some more preferred embodiments, the ethylene propylene diene monomer rubber and chlorosulfonated polyethylene rubber are 45% by mass: and 55 percent.

In some preferred embodiments, the method for preparing the compounded rubber comprises the following steps:

s1, adding 45 mass percent of ethylene propylene diene monomer rubber and 55 mass percent of chlorosulfonated polyethylene rubber into an internal mixer, adding 0.03 mass percent of BIPB of the total mass of the rubber into the internal mixer for internal mixing, and carrying out internal mixing for 6-8 minutes at 120-130 ℃; then transferring the mixture into an open mill for open milling, and carrying out open milling for 1-2 minutes at the temperature of 20-30 ℃; and then baking the semi-crosslinked rubber in an oven, crosslinking for 5-6 minutes at 125 ℃, extruding, granulating and mixing to obtain the composite rubber.

The invention discovers that when the ethylene propylene diene monomer rubber and the chlorosulfonated polyethylene rubber are mixed by mass percent as 45%: when 55 percent of the rubber is mixed, the stretchability and the ductility of the obtained composite rubber and the compatibility of the rest fillers are obviously improved. Ethylene propylene diene rubber is a terpolymer of ethylene, propylene and non-conjugated diene, diene has a special structure and can be copolymerized only by one of two bonds, and unsaturated double bonds are mainly used as crosslinking sites. The other unsaturation will not be a polymer backbone but will be a side chain. The main polymer chain of ethylene propylene diene is fully saturated, and the characteristic enables ethylene propylene diene to have good heat resistance and oxidation resistance. But ethylene propylene diene is nonpolar and has resistance to polar solution, when the ethylene propylene diene is blended with chlorosulfonated polyethylene rubber, the physical and mechanical properties of vulcanized rubber can be improved, and the wrapping property of the chlorosulfonated polyethylene rubber on fillers can be improved due to the presence of the ethylene propylene diene rubber, so that the ethylene propylene diene rubber and the chlorosulfonated polyethylene rubber are blended to generate a synergistic effect.

Filler material

In some preferred embodiments, the filler is at least one of barium sulfate, iron powder, magnesium sulfate, light calcium, talc, kaolin.

In some more preferred embodiments, the filler is a mixture of barium sulfate and iron powder.

In some more preferred embodiments, the weight ratio of barium sulfate to iron powder is 6: 1.

in some more preferred embodiments, the particle size of the barium sulfate is 1250 mesh and the particle size of the iron powder is 1000 mesh.

The invention discovers that when barium sulfate and iron powder are compounded for use, the density of the product can be effectively improved, and the shock resistance, sound insulation and noise reduction performance of the product are improved, particularly the weight ratio of the barium sulfate to the iron powder is 6: 1, the effect is best when the composition is carried out. The existence of a small amount of iron powder not only increases the density of the product, but also improves the glossiness of the product. Particularly, when the particle size of the barium sulfate is 1250 meshes and the particle size of the iron powder is 1000 meshes, the effect is better, because the barium sulfate and the iron powder are compounded by selecting different particle sizes, the compatibility of the mixture in rubber and PVC resin systems can be ensured, and the agglomeration phenomenon caused by too small particle sizes can be prevented, so that the dispersibility of the mixture in the systems is further influenced.

Flame retardant

In some preferred embodiments, the flame retardant is at least one of antimony trioxide, silica, magnesium oxide, magnesium hydroxide, aluminum hydroxide.

In a more preferred embodiment, the flame retardant is a mixture of antimony trioxide, silica and magnesium oxide.

In a more preferred embodiment, the weight ratio of antimony trioxide, silica and magnesium oxide is 5: 9: 4.

the invention discovers that when the antimony trioxide, the silicon dioxide and the magnesium oxide are compounded for use, the flame retardant property of the product can be obviously improved, and the application range of the product is expanded. However, when the three components are compounded and used, the inventor finds that the mixture has poor dispersibility in the system, probably because antimony trioxide, silicon dioxide and magnesium oxide are easy to generate negative charges during mixing and easily generate mutual repulsion with rubber, so that the mixture has poor dispersibility in the rubber; if dioctyl terephthalate is added into the system, the excellent compatibility of the dioctyl terephthalate can improve the dispersing force of the flame retardant in the system.

Smoke suppressant

In some preferred embodiments, the smoke suppressant is magnesium hydroxide.

Carbon forming agent

In some preferred embodiments, the carbonific is FR 501A.

Plasticizer

In some preferred embodiments, the plasticizer is at least one of phthalate, dioctyl terephthalate, polyol esters, alkyl sulfonates.

In some more preferred embodiments, the plasticizer is dioctyl terephthalate.

Dispersing agent

In some preferred embodiments, the dispersant is at least one of barium stearate, calcium stearate, magnesium stearate, cadmium stearate, copper stearate.

Flow aid

In some preferred embodiments, the flow aid is an ethylene-acrylate copolymer.

In some more preferred embodiments, the flow aid is an ethylene ethyl acrylate copolymer.

In some more preferred embodiments, the ethylene ethyl acrylate copolymer has a melt index of 70 to 200g/10 min.

More preferably, the ethylene-ethyl acrylate copolymer has a melt index of 200g/10 min.

The inventor finds that when the flow additive is selected from ethylene-ethyl acrylate copolymer, the melt index of the flow additive is 70-200g/10min, on one hand, the flow additive can be acted with PVC resin together to improve the processing performance of the material; on one hand, the material can be acted together with a stabilizer to improve the environmental resistance, impact resistance and bending fatigue resistance of the material, and on the other hand, the material has excellent compatibility with a system and can be mixed with a filler without becoming brittle.

Stabilizer

In some preferred embodiments, the stabilizer is a complex of at least one of antioxidant 1010, antioxidant 168, antioxidant 1076 and a stearate.

In some preferred embodiments, the stabilizer is a complex of at least one of antioxidant 1010, antioxidant 168, antioxidant 1076 and sodium stearate.

Carbon black

In some preferred embodiments, the carbon black is N550.

The second aspect of the present invention also provides a method for preparing the soundproof and damping felt, comprising the steps of:

s1, heating the internal mixer to 80-120 ℃, sequentially pouring 5/7 parts by weight of the compounded rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of the compounded rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, heating the internal mixer again, respectively turning at 120 ℃, 140 ℃, 150 ℃, 155 ℃, tilting for 30 degrees for two times, turning for 6 times, and carrying out internal mixing at 160 ℃ for 15-20min, and discharging to obtain the sound-insulation and shock-absorption felt.

Examples

The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples. Unless otherwise specified, all the raw materials in the present invention are commercially available.

Example 1

The embodiment 1 provides a sound-insulation damping felt, which comprises the following preparation raw materials in parts by weight: 10 parts of PVC resin, 30 parts of composite rubber, 150 parts of filler, 5 parts of flame retardant, 0.1 part of smoke suppressant, 0.5 part of carbon forming agent, 12 parts of plasticizer, 0.3 part of dispersant, 0.1 part of flow assistant, 1 part of zinc stearate, 1 part of stabilizer and 3 parts of carbon black.

The viscosity number of the PVC resin is 107-117 ml/g, and the average polymerization degree is 1000-1150 (purchased from Ortemet plastic raw material trade shop of Dongguan, brand: Junzhen, model: SG-5).

The composite rubber is ethylene propylene diene monomer rubber and chlorosulfonated polyethylene rubber, and the mass percentage of the ethylene propylene diene monomer rubber to the chlorosulfonated polyethylene rubber is 45%: 55% (both from Zhongshan Hongbei high molecular materials Co., Ltd.).

The preparation method of the composite rubber comprises the following steps:

s1, adding the ethylene propylene diene monomer rubber and the chlorosulfonated polyethylene rubber in the mass percentage into an internal mixer, adding BIPB accounting for 0.03 percent of the total mass of the rubber, and internally mixing for 8 minutes at 120 ℃; then transferring the mixture into an open mill for open milling, and carrying out open milling at 20 ℃ for 2 minutes; and then baking the semi-crosslinked rubber in an oven, crosslinking for 5 minutes at 125 ℃, extruding, granulating, and mixing to obtain the composite rubber.

The filler is a mixture of barium sulfate and iron powder, and the weight ratio of the barium sulfate to the iron powder is 6: 1.

the particle size of the barium sulfate is 1250 meshes (purchased from Shuangma chemical Co., Ltd., corridor City), and the particle size of the iron powder is 1000 meshes (Tuolin mineral processing factory, Ling county).

The flame retardant is a mixture of antimony trioxide (purchased from Jinying Tai chemical Co., Ltd., Jinan), silicon dioxide (purchased from Zhonghang nanotechnology development Co., Ltd.), and magnesium oxide (purchased from Zhonghang nanotechnology development Co., Ltd., He), wherein the weight ratio of the antimony trioxide to the silicon dioxide to the magnesium oxide is 5: 9: 4.

the smoke suppressant is magnesium hydroxide (purchased from Jinying Tai chemical Co., Ltd., Jinan).

The carbon forming agent is FR501A (available from the new flame-retardant material of denna).

The plasticizer is dioctyl terephthalate (CAS number: 6422-86-2).

The dispersant is calcium stearate (CAS number: 1592-23-0).

The flow assistant is an ethylene-ethyl acrylate copolymer, and the melt index of the ethylene-ethyl acrylate copolymer is 70g/10min (purchased from Keyin chemical industry, brand: French Dokema, model: 7500).

The stabilizer is a compound of antioxidant 1010 and sodium stearate, and the mass ratio of the antioxidant 1010 to the sodium stearate is 0.5: 0.7.

the carbon black is N550 (purchased from Tianjin Yibo Rui chemical Co., Ltd., model number: carbon black N550).

The embodiment also provides a preparation method of the sound-insulation and shock-absorption felt, which comprises the following steps:

s1, heating the internal mixer to 90 ℃, sequentially pouring 5/7 parts by weight of the compounded rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of the compounded rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, heating the internal mixer again, turning at 120 ℃, 140 ℃, 150 ℃, 155 ℃, tilting for 30 degrees twice, turning for 30 degrees, turning for 6 times, internally mixing at 160 ℃ for 15-20min, and discharging to obtain the sound-insulation and shock-absorption felt.

Example 2

Embodiment 2 provides a sound-proof and shock-absorbing felt, which comprises the following preparation raw materials in parts by weight: 20 parts of PVC resin, 40 parts of composite rubber, 200 parts of filler, 10 parts of flame retardant, 0.5 part of smoke suppressant, 1 part of carbon forming agent, 16 parts of plasticizer, 0.8 part of dispersant, 0.5 part of flow aid, 2 parts of zinc stearate, 2 parts of stabilizer and 8 parts of carbon black.

The viscosity number of the PVC resin is 107-117 ml/g, and the average polymerization degree is 1000-1150 (purchased from Ortemet plastic raw material trade shop of Dongguan, brand: Junzhen, model: SG-5).

The composite rubber is ethylene propylene diene monomer rubber and chlorosulfonated polyethylene rubber, and the mass percentage of the ethylene propylene diene monomer rubber to the chlorosulfonated polyethylene rubber is 45%: 55% (both from Zhongshan Hongbei high molecular materials Co., Ltd.).

The preparation method of the composite rubber comprises the following steps:

s1, adding the ethylene propylene diene monomer rubber and the chlorosulfonated polyethylene rubber in the mass percentage into an internal mixer, adding BIPB accounting for 0.03 percent of the total mass of the rubber, and internally mixing for 6 minutes at 130 ℃; then transferring the mixture into an open mill for open milling, and carrying out open milling at 30 ℃ for 1 minute; and then baking the semi-crosslinked rubber in an oven, crosslinking for 6 minutes at 125 ℃, extruding, granulating, and mixing to obtain the composite rubber.

The filler is a mixture of barium sulfate and iron powder, and the weight ratio of the barium sulfate to the iron powder is 6: 1.

the particle size of the barium sulfate is 1250 meshes (purchased from Shuangma chemical Co., Ltd., corridor City), and the particle size of the iron powder is 1000 meshes (Tuolin mineral processing factory, Ling county).

The flame retardant is a mixture of antimony trioxide (purchased from Jinying Tai chemical Co., Ltd., Jinan), silicon dioxide (purchased from Zhonghang nanotechnology development Co., Ltd.), and magnesium oxide (purchased from Zhonghang nanotechnology development Co., Ltd., He), wherein the weight ratio of the antimony trioxide to the silicon dioxide to the magnesium oxide is 5: 9: 4.

the smoke suppressant is magnesium hydroxide (purchased from Jinying Tai chemical Co., Ltd., Jinan).

The carbon forming agent is FR501A (available from the new flame-retardant material of denna).

The plasticizer is dioctyl terephthalate (CAS number: 6422-86-2).

The dispersing agent is magnesium stearate (CAS number: 557-04-0).

The flow assistant is an ethylene-ethyl acrylate copolymer, and the melt index of the ethylene-ethyl acrylate copolymer is 200g/10min (purchased from Keyin chemical industry, brand: French Archimedes, model: 8200).

The stabilizer is a compound of antioxidant 168 and sodium stearate, and the mass ratio of the antioxidant 168 to the sodium stearate is 0.5: 0.5.

the carbon black is N550 (purchased from Tianjin Yibo Rui chemical Co., Ltd., model number: carbon black N550).

The embodiment also provides a preparation method of the sound-insulation and shock-absorption felt, which comprises the following steps:

s1, heating the internal mixer to 110 ℃, sequentially pouring 5/7 parts by weight of the compounded rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of the compounded rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, heating the internal mixer again, turning at 120 ℃, 140 ℃, 150 ℃, 155 ℃, tilting for 30 ℃ twice, turning for 30 ℃ for 6 times, internally mixing at 160 ℃ for 15-20min after totally turning for 6 times, and discharging to obtain the sound-insulation and shock-absorption felt.

Example 3

Embodiment 3 provides a sound-proof and shock-absorbing felt, which comprises the following preparation raw materials in parts by weight: 15 parts of PVC resin, 35 parts of composite rubber, 175 parts of filler, 9 parts of flame retardant, 0.3 part of smoke suppressant, 0.7 part of carbon forming agent, 14 parts of plasticizer, 0.5 part of dispersant, 0.3 part of flow aid, 1.5 parts of zinc stearate, 1.5 parts of stabilizer and 5 parts of carbon black.

The viscosity number of the PVC resin is 107-117 ml/g, and the average polymerization degree is 1000-1150 (purchased from Ortemet plastic raw material trade shop of Dongguan, brand: Junzhen, model: SG-5).

The composite rubber is ethylene propylene diene monomer rubber and chlorosulfonated polyethylene rubber, and the mass percentage of the ethylene propylene diene monomer rubber to the chlorosulfonated polyethylene rubber is 45%: 55% (both from Zhongshan Hongbei high molecular materials Co., Ltd.).

The preparation method of the composite rubber comprises the following steps:

s1, adding the ethylene propylene diene monomer rubber and the chlorosulfonated polyethylene rubber in the mass percentage into an internal mixer, adding BIPB accounting for 0.03 percent of the total mass of the rubber, and internally mixing for 7 minutes at 125 ℃; then transferring the mixture into an open mill for open milling, and carrying out open milling at 25 ℃ for 2 minutes; and then baking the semi-crosslinked rubber in an oven, crosslinking for 5 minutes at 125 ℃, extruding, granulating, and mixing to obtain the composite rubber.

The filler is a mixture of barium sulfate and iron powder, and the weight ratio of the barium sulfate to the iron powder is 6: 1.

the particle size of the barium sulfate is 1250 meshes (purchased from Shuangma chemical Co., Ltd., corridor City), and the particle size of the iron powder is 1000 meshes (Tuolin mineral processing factory, Ling county).

The flame retardant is a mixture of antimony trioxide (purchased from Jinying Tai chemical Co., Ltd., Jinan), silicon dioxide (purchased from Zhonghang nanotechnology development Co., Ltd.), and magnesium oxide (purchased from Zhonghang nanotechnology development Co., Ltd., He), wherein the weight ratio of the antimony trioxide to the silicon dioxide to the magnesium oxide is 5: 9: 4.

the smoke suppressant is magnesium hydroxide (purchased from Jinying Tai chemical Co., Ltd., Jinan).

The carbon forming agent is FR501A (available from the new flame-retardant material of denna).

The plasticizer is dioctyl terephthalate (CAS number: 6422-86-2).

The dispersant is calcium stearate (CAS number: 1592-23-0).

The flow assistant is an ethylene-ethyl acrylate copolymer, and the melt index of the ethylene-ethyl acrylate copolymer is 200g/10min (purchased from Keyin chemical industry, brand: French Archimedes, model: 8200).

The stabilizer is a compound of an antioxidant 1076 and sodium stearate, and the mass ratio of the antioxidant to the sodium stearate is 0.5: 0.7.

the carbon black is N550 (purchased from Tianjin Yibo Rui chemical Co., Ltd., model number: carbon black N550).

The embodiment also provides a preparation method of the sound-insulation and shock-absorption felt, which comprises the following steps:

s1, heating an internal mixer to 100 ℃, sequentially pouring 5/7 parts by weight of compound rubber, 1/3 parts by weight of barium sulfate, a mixture of PVC resin, a flame retardant, a smoke suppressant and a carbon forming agent, 1/3 parts by weight of barium sulfate, iron powder, DOPT, the rest parts by weight of compound rubber, a dispersing agent, a flow aid, zinc stearate, a stabilizer, carbon black and the rest parts by weight of barium sulfate into the internal mixer, heating the internal mixer again, turning at 120 ℃, 140 ℃, 150 ℃, 155 ℃, tilting for 30 ℃ twice, turning for 30 ℃ for 6 times, internally mixing at 160 ℃ for 15-20min after totally turning for 6 times, and discharging to obtain the sound-insulation and shock-absorption felt.

Comparative example 1

The same as in example 3, except that the viscosity number of the PVC resin was changed to 73 to 86ml/g, and the average degree of polymerization was changed to 650 to 740 (type: SG-8).

Comparative example 2

The viscosity number of the PVC resin was changed to 144 to 156ml/g, and the average degree of polymerization was 1536 to 1785 (model: SG-1), as in example 3.

Comparative example 3

The compounded rubber was changed to a single ethylene propylene diene monomer rubber (available from hong shan shellfish Polymer materials Co., Ltd.) and the remainder was the same as in example 3.

Comparative example 4

The compounded rubber was changed to a single chlorosulfonated polyethylene rubber (available from hong shan shellfish Polymer materials, Inc.), and the remainder was the same as in example 3.

Comparative example 5

The filler was changed to barium sulfate alone, as in example 3.

Comparative example 6

The same as in example 3, except that the particle size of barium sulfate was 800 mesh (purchased from Shuangma chemical Co., Ltd., Gallery), and the particle size of iron powder was 1200 mesh (Tuolin mineral processing plant, Ling county).

Comparative example 7

The melt index of the ethylene-ethyl acrylate copolymer was 20g/10min (available from Kane chemical, brand: French Acomata, model: 5500), as in example 3.

Performance testing

1. Appearance evaluation: observing whether the surfaces of the sound-insulation damping felts obtained in the examples 1-3 and the comparative examples 1-7 are flat and neat or not, and whether impurities exist or not; the appearance of the material was evaluated by 10 persons who had 5 years of work experience in the field of sound and vibration deadening felt, and the results are shown in table 1.

2. And (3) testing the density: the densities of the sound-insulating and shock-absorbing felts of examples 1 to 3 and comparative examples 1 to 7 were measured by a gravimeter method, and are shown in table 1.

3. Tensile strength: the tensile strength of the soundproof and vibration damping blankets obtained in examples 1 to 3 and comparative examples 1 to 7 was measured using a microcomputer-controlled electronic universal tester, and is shown in table 1.

TABLE 1

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.