Resin expansion glue and preparation method thereof

Abstract

The invention relates to a resin expansion glue and a preparation method thereof. The resin expansion glue comprises multiple layers of resin expansion glues, wherein the resin expansion glues comprises outer layer expansion glues located on the two sides and a middle layer expansion glue arranged between the two outer layer expansion glues, the outer layer is made of a vinyl elastomer foaming material, and has good adhesion with a vehicle body metal plate so as to ensure the plugging property of a metal plate cavity, the middle layer is made of a polyethylene expansion glue, and the polyethylene expansion glue is high in rigidity and convenient to install so as to eliminate framework materials. According to the invention, the preparation method is achieved through a three-layer co-extrusion technology and a cutting technology, so that the structure is simple, the number of production procedures is small, operation is easy and convenient, production efficiency is high, and the utilization efficiency of the expansion glue is high.

Description

technical field [0001] The invention relates to the technical field of vehicle body expansion glue, in particular to a resin expansion glue and a preparation method thereof. Background technique [0002] The function of the body expansion rubber is to block the noise and vibration outside the body by filling the cavity of the body sheet metal, so as to ensure the comfort of the ride. At present, resin expansion rubber products usually use a single raw material to form by injection molding or extrusion. In the actual production process, injection molding usually produces a large amount of leftovers in the gate and runner, which affects the utilization rate of the expansion rubber. In addition, in order to facilitate the installation of the expansion rubber on the sheet metal, the expansion rubber is usually injected Wrapped on the skeleton material, this not only increases the weight of the vehicle body but also increases the production cost of the expansion rubber product. ...