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A sound-insulating material composition and a sound-insulating sheet for vehicles

A technology of sound insulation material and composition, applied in the field of auto parts, can solve the problem that the sound insulation effect cannot meet the requirements, etc., and achieve the effects of good damping performance, improved sound absorption, and improved damping performance

Active Publication Date: 2019-06-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, PVC and EVA resins are generally used as base materials for vehicle sound insulation sheets, and the vehicle sound insulation sheets are prepared by adding a single sheet-like filler and ordinary inorganic fillers. The sound insulation effect of this type of material cannot meet the needs of current electric vehicles. Requirements for sound insulation materials generated by low-frequency or ultra-high-frequency noise

Method used

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  • A sound-insulating material composition and a sound-insulating sheet for vehicles
  • A sound-insulating material composition and a sound-insulating sheet for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 8kg of dolomite (the average particle size of dolomite is 200 mesh), 60kg of barium sulfate, and 0.5kg of silane coupling agent, and mix them in a mixer at 110°C for 5 minutes;

[0024] (2) Weigh 10kg of mica powder (the average particle size of mica powder is 325 mesh), 3kg of paraffin oil and mix them evenly in a plastic container;

[0025] (3) Weigh 20kg of EPDM rubber, 1kg of maleic anhydride grafted EPDM, 20kg of flame retardant (6kg of zinc borate, 12kg of aluminum hydroxide, 1.8kg of red phosphorus, 0.2kg of ammonium octamolybdate), 1kg of carbon black, vulcanizing agent (BIBP96 ) 1kg, cross-linking agent (tripropylene cyanurate) 0.5kg and 3.8kg of stearic acid, zinc stearate, zinc oxide, calcium oxide, anti-aging agent (anti-aging agent 4010) mixing, and step ( 1) and the mixture obtained in the step (2) are placed together in a banbury mixer, and the temperature in the banbury mixer is set to be 120°C, and the banbury mixer time is 15min;

[0026] (4...

Embodiment 2

[0029] Adopt the method identical with embodiment 1 to prepare sound insulation sheet, difference is that the average particle diameter of the dolomite that adopts in step (1) is 600 orders, and in step (2), the average particle diameter of the mica powder that adopts is 600 mesh; the vehicle sound-insulating sheet A2 of Example 2 was prepared.

Embodiment 3

[0031] Adopt the method identical with embodiment 1 to prepare sound insulation sheet, difference is, the average particle diameter of the dolomite that adopts in step (1) is 200 orders, and in step (2), the average particle diameter of the mica powder that adopts is 600 mesh; the vehicle sound-insulating sheet A3 of Example 3 was prepared.

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Abstract

The application proposes a sound-insulating material composition and a sound-insulating sheet for vehicles, the sound-insulating material composition comprising 50-300 parts by weight of EPDM rubber, 10-300 parts by weight of mica powder, and 10-300 parts by weight of dolomite , 2-15 parts by weight of vulcanizing agent, 3-60 parts by weight of compatibilizer, 30-300 parts by weight of flame retardant, 0.2-3 parts by weight of crosslinking agent, 10-80 parts by weight of plasticizer, 100‑500 parts by weight of barium sulfate; the application further proposes a sound-insulating sheet for vehicles; the application can improve the sound-insulation by a certain weight ratio of flake mica powder and massive dolomite in the sound-insulation base material The processing performance of the material composition improves the vibration-absorbing and sound-insulating effects of the sound-insulating sheet for vehicles.

Description

technical field [0001] The invention belongs to the field of auto parts, in particular to a sound-insulating material composition and a sound-insulating sheet for vehicles. Background technique [0002] At present, due to the limited fossil energy resources and the environmental problems caused by automobile exhaust, electric vehicles and hybrid vehicles will become a new development direction. Therefore, the sound-generating components such as motors and electronic controls used in electric vehicles put forward higher requirements for the improvement of the NVH performance of the whole vehicle. Especially the noise in the high-frequency part is more prominent, so higher requirements are put forward for the noise-reducing materials. [0003] In the prior art, PVC and EVA resins are generally used as base materials for vehicle sound insulation sheets, and the vehicle sound insulation sheets are prepared by adding a single sheet-like filler and ordinary inorganic fillers. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L91/06C08L51/04C08K13/06C08K9/06C08K3/26C08K3/34C08K3/30
CPCC08L23/16C08L2201/02C08L2205/03C08L2205/08C08L91/06C08L51/04C08K13/06C08K9/06C08K2003/267C08K3/34C08K2003/3045C08L51/003C08K3/30B60R13/08C08K2003/385C08K5/0066C08L23/06C08L51/06C08L91/00C08K3/04C08K5/0025C08K13/02C08K3/26C08K3/12C08K3/06C08K3/22C08K5/3492C08L2205/025
Inventor 张敏林信平孙亚轩周明双周雄
Owner BYD CO LTD