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Sound-insulating composite material for rail traffic as well as preparation method thereof

A composite material and rail transportation technology, applied in the field of rail transportation, can solve the problems of poor damping and vibration reduction performance, high smoke density and smoke toxicity, which cannot meet the requirements of rail transportation, and achieve excellent vibration reduction and sound insulation performance, easy to operate, The effect of sound insulation optimization

Active Publication Date: 2019-01-18
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material needs to add a large amount of plasticizer, which leads to poor environmental protection. In addition, because polyvinyl chloride releases a large amount of hydrogen chloride gas when it is burned, its smoke density and smoke toxicity are very high, which limits the large-scale application of this material.
The second type is composed of ethylene-vinyl acetate copolymer, polyolefin elastomer, EPDM rubber and other environmentally friendly thermoplastic resins, inorganic fillers and additives, and is widely used in the fields of automobiles, home appliances and electrical equipment. It can be filled with more fillers, so the cost is lower and it has good sound insulation performance, but its flame retardancy is generally not good, especially the damping and vibration reduction performance is not good, and it cannot meet the applications in rail transportation and other fields

Method used

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  • Sound-insulating composite material for rail traffic as well as preparation method thereof
  • Sound-insulating composite material for rail traffic as well as preparation method thereof
  • Sound-insulating composite material for rail traffic as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A sound-insulating composite material for rail transit, comprising the following components in parts by weight: 15 parts of ethylene-vinyl acetate copolymer, 10 parts of styrene-ethylene branched polydiene-styrene triblock copolymer, barium sulfate 75 parts, 2 parts of naphthenic oil, 1 part of stearic acid, 0.5 part of antioxidant, 0.5 part of coupling agent, and 1 part of dispersant. Wherein, the temperature of the peak of the loss factor tanδ of the styrene-ethylene branched polydiene-styrene triblock copolymer is 20° C., and the peak value is 1.2.

[0030] The preparation method of above-mentioned composite material comprises the following steps:

[0031] (1) Internal mixing: weigh each component according to the proportion and put it into an internal mixer preheated to 120-150°C, mix the materials and plasticize them evenly;

[0032] (2) Extrusion: Transport the plasticized material to the feed port of the extruder while it is hot and feed it through the conical t...

Embodiment 2

[0035] A sound-insulating composite material for rail transit, comprising the following components in parts by weight: 15 parts of ethylene-vinyl acetate copolymer, 10 parts of styrene-ethylene branched polydiene-styrene triblock copolymer, inorganic expansion 35 parts of flame retardant, 40 parts of barium sulfate, 2 parts of naphthenic oil, 1 part of stearic acid, 0.5 part of antioxidant, 0.5 part of coupling agent, and 1 part of dispersant. Among them, the temperature of the loss factor tanδ peak of styrene-ethylene branched polydiene-styrene triblock copolymer is 20°C, the peak value is 1.2, and the inorganic intumescent flame retardants are piperazine pyrophosphate and polymelamine phosphate according to The ratio relationship is a mixture of 2:1 combination.

[0036] The preparation method of the composite material in this embodiment is the same as that in Embodiment 1, and the thickness is 1mm.

Embodiment 3

[0038] A sound-insulating composite material for rail transit, comprising the following components in parts by weight: 15 parts of ethylene-vinyl acetate copolymer, 10 parts of styrene-ethylene branched polydiene-styrene triblock copolymer, inorganic expansion 35 parts of flame retardant, 40 parts of barium sulfate, 2 parts of naphthenic oil, 1 part of stearic acid, 0.5 part of antioxidant, 0.5 part of coupling agent, and 1 part of dispersant. Among them, the temperature of the loss factor tanδ peak of styrene-ethylene branched polydiene-styrene triblock copolymer is -5°C, the peak value is 0.7, and the inorganic intumescent flame retardants are piperazine pyrophosphate and polymelamine phosphate The mixture is combined 2:1.

[0039] The preparation method of the composite material in this embodiment is the same as that in Embodiment 1, and the thickness is 1 mm.

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Abstract

The invention discloses a sound-insulating composite material for rail traffic. The sound-insulating composite material for rail traffic comprises the following components in parts by weight: 10 to 20parts of thermoplastic resin, 5 to 15 parts of a segmented copolymer, 30 to 80 parts of inorganic filler and 3 to 5 parts of an aid, wherein the segmented copolymer is a styrene-ethylene branched polydiene-styrene triblock copolymer. The invention correspondingly provides a preparation method of the composite material. The styrene-ethylene branched polydiene-styrene triblock copolymer is added into a matrix, namely thermoplastic resin, so that the material is endowed with excellent vibration-reducing and sound-insulating properties, particularly that low-frequency vibration and noise are effectively reduced, and the riding comfortability can be greatly improved when the sound-insulating composite material is applied to rail traffic. In addition, all the components of the sound-insulatingcomposite material are green and environmentally-friendly materials, so that the finally prepared composite material has the property advantages of environmental friendliness, excellent damping property and sound-insulating property and the like.

Description

technical field [0001] The invention belongs to the field of rail traffic, and in particular relates to a vibration-damping and sound-insulating material for rail traffic and a preparation method thereof. Background technique [0002] Sound insulation materials can greatly attenuate the transmission of noise, so they are widely used in construction, automobile, rail transit, petrochemical, electric power and other fields. [0003] There are mainly two schemes for the existing polymer sound insulation materials. The first one is composed of polyvinyl chloride resin, flame retardant, plasticizer and inorganic filler, etc. It is used in rail transit, construction, petrochemical pipelines, etc. It has better vibration and noise reduction effect. However, this material requires the addition of a large amount of plasticizer, resulting in poor environmental protection. In addition, because polyvinyl chloride releases a large amount of hydrogen chloride gas when it is burned, its s...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L53/00C08K3/30C08K5/3492C08K5/3462
CPCC08L23/0853C08L53/00C08L2201/02C08K3/30C08K5/34928C08K5/3462
Inventor 颜渊巍熊昌义高玮胡钊黄自华
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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