Damping type high-magnification rubber expansion film for vehicle and preparation method of film

Abstract

The invention relates to a damping type high-magnification rubber expansion film for vehicles and a preparation method of the film. The damping type high-magnification rubber expansion film comprises the following components by weight: 38-42 parts of rubber, 55-57 parts of a damping filler, 2 parts of a vulcanizing agent, 0.2 part of an accelerator, and the balance of one or more foaming agents. A certain proportion of the damping filler and the specific foaming agent are added into an original system, so that the problems that an expansion film has no damping function and is low in rate in the automobile production process are solved, the film has damping performance and high expansion rate on the basis of sound absorption and insulation, the damping vibration attenuation performance is improved, and the thickness of the film is reduced when a same cavity gap is blocked, so that the cost can be reduced to a certain extent.

Description

technical field [0001] The invention relates to the technical field of reinforced films, in particular to a damping type high-magnification rubber expansion film for vehicles and a preparation method thereof. Background technique [0002] The damping rubber expansion film for automobiles is based on damping rubber, combined with foaming agent and vulcanizing agent to prepare a film with foam structure and damping performance after foaming. It is mainly used in parts with cavity structures such as doors, roof beams, and A / B / C pillars around the car body. After the electrophoresis process, it is vulcanized and foamed and bonded to the steel plate to seal the cavity structure and play a role in damping and reducing vibration. The function of sound insulation and noise reduction can improve the NVH performance of the whole vehicle. At present, the rubber expansion film has the following disadvantages in the application process: first, the rubber expansion film material generall...

AI Technical Summary

Problems solved by technology

At present, the rubber expansion film has the following disadvantages in the application process: first, the rubber expansion film material generally has no damping function, and only plays a role of sound insulation, without damping and vibration reduction; second, the expansion ratio is generally low, and the cavity cannot be effectively blocked , when the cavity needs to be sealed, the thickness of the expansion film needs to be increased, which will lead to an increase in cost

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