Low-density, flexible polymer-based foamed sound insulation material and preparation method thereof

A technology of flexible polymer and sound insulation materials, applied in flexible polymer-based foamed sound insulation materials and their preparation, in the field of low density, it can solve the problems of low density and polymer-based sound insulation materials cannot have both, and achieve low density. Density, good flexibility, the effect of improving sound insulation performance

Active Publication Date: 2020-04-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a polymer-based foamed sound-insulating material and its preparation method in view of the current state of the preparation of the existing polymer-based sound-insulating materials, so as to solve the problem that the existing polymer-based sound-insulating materials cannot have both low density and low density. The problem of flexibility and high sound insulation performance

Method used

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  • Low-density, flexible polymer-based foamed sound insulation material and preparation method thereof
  • Low-density, flexible polymer-based foamed sound insulation material and preparation method thereof
  • Low-density, flexible polymer-based foamed sound insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix polyvinyl chloride (100 parts) with stabilizer (4.5 parts), plasticizer (60 parts), processing aid (4 parts), azodicarbonamide blowing agent (1%), mica (10%) Mix in a high-speed mixer at 90°C for 20 minutes, so that the plasticizer is completely absorbed to obtain a polyvinyl chloride dry mix. The dry blend was mixed and plasticized on a two-roll mill at 140°C for 10 minutes. Fill the mold with a thickness of 2 mm with the obtained mixed plastic compound, and foam molding in a pressure molding machine for 10 minutes at a temperature of 180 ° C and a pressure of 10 MPa.

[0026] The low-density, flexible foam sound insulation material that present embodiment prepares, density is 0.45g / cm 3 , expansion ratio 2.8, cell density 1.1×10 7 piece / cm 3 , the average cell size is 60 μm, the hardness is 35, and the average sound insulation of the material is 32 dB.

Embodiment 2

[0028] Roll the EPDM rubber (100 parts) on a two-roll mill to form a sheet, and then successively add zinc oxide (5 parts), stearic acid (0.5 parts), vulcanizing agent peroxidation and cumene (1 part ), expanded microspheres (5%), reinforcing carbon black (20 parts), and boron nitride (5%) were added to the rubber, and the fillers, additives and rubber matrix were mixed evenly by packing and tumbling, and mixed for 20 After 10 minutes, the mixed rubber is thinly passed out of the sheet, and the temperature of the two-roller mill is 90°C. Fill the mold with a thickness of 2 mm with the mixed rubber, and vulcanize and foam in a flat vulcanizer for 10 minutes at a temperature of 160°C and a pressure of 15 MPa.

[0029] The low-density, flexible foam sound insulation material prepared in this example has a density of 0.32 g / cm 3 , expansion ratio 3.3, cell density 1.5×10 7 piece / cm 3, the average cell size is 50 μm, the hardness is 30, and the average sound insulation of the ma...

Embodiment 3

[0031] Mix polyvinyl chloride (100 parts) with stabilizer (4.5 parts), plasticizer (50 parts), processing aid (4 parts), azodicarbonamide blowing agent (2%), mica (5%) , Boron nitride (5%) was mixed in a high-speed mixer at 90°C for 20 minutes, so that the plasticizer was completely absorbed, and a polyvinyl chloride dry mix was obtained. The dry blend was mixed and plasticized on a two-roll mill at 140°C for 10 minutes. The obtained mixed plastic material is pelletized and put into a single-screw extruder for extrusion and foaming. The temperature of each section of the extruder is: 120°C, 140°C, 180°C, 180°C, and the die is 170°C. °C.

[0032] The foamed sound insulation material prepared in this example has a density of 0.30 g / cm 3 , expansion ratio 4.1, cell density 8.5×10 6 piece / cm 3 , the average cell size is 90 μm, the hardness is 38, and the average sound insulation is 34 dB.

[0033] In order to show more clearly that the present invention utilizes the special s...

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Abstract

The invention discloses a low-density and flexible polymer-based foaming and sound insulating material and a preparation method thereof. The preparation method comprises the following steps: firstly mixing and plastifying a polymer matrix, auxiliaries, inorganic filler in lamellar morphology and a foaming agent, and then preparing into a foaming sheet material. The low-density and flexible polymer-based foaming and sound insulating material has relatively high foaming ratio, so that density of the material is extremely low; and the polymer matrix with low glass transition temperature is selected, so that the material has excellent flexibility. The material is obviously characterized in that lamellar filler is oriented and arranged along tangential direction of a cell wall in a foaming process, and one sound wave propagation barrier is formed, so that sound insulation property is improved. The low-density and flexible polymer-based foaming and sound insulating material disclosed by theinvention can be well improved in the sound insulation property by adding less filler, has extremely low density and good flexibility compared with the traditional polymer-based sound insulating material and is applicable to noise control in the fields of traffic, buildings and aerospace.

Description

technical field [0001] The invention belongs to the field of polymer-based foamed composite material preparation, and in particular relates to a low-density, flexible polymer-based foamed sound insulation material and a preparation method thereof. Background technique [0002] The rapid development of the transportation industry and the construction industry has brought great convenience to people, but it has also brought serious noise pollution. The design and development of sound-insulating materials has received extensive attention in the field of noise control. In consideration of environmental protection, energy saving and adapting to different usage occasions, sound insulation materials with light weight and softness are more popular. Due to the advantages of low cost, easy molding and processing, and light weight, polymer materials have gradually replaced traditional sound insulation materials such as metals and inorganic non-metals, and have become a research hotspo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K3/34C08L23/16C08K13/02C08K3/22C08K5/09C08K5/14C08K3/04C08K3/38C08J9/10C08J9/32
CPCC08J9/103C08J9/32C08J2203/04C08J2323/16C08J2327/06C08K3/04C08K3/22C08K3/34C08K3/38C08K5/09C08K5/14C08K13/02C08K2003/2296C08K2003/385C08L2203/14C08L27/06C08L23/16
Inventor 郭少云熊英韩腾
Owner SICHUAN UNIV
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