Self-adhesion expansion structure adhesive tape for automobile and preparation method thereof

Abstract

The invention discloses a self-adhesion expansion structure adhesive tape for an automobile and a preparation method thereof. The self-adhesion expansion structure adhesive tape is prepared from the following raw materials in percentage by weight: 30 to 60 percent of epoxy resin, 2 to 15 percent of solid rubber, 1 to 10 percent of fiber, 10 to 30 percent of inorganic fillers, 2 to 10 percent of thixotropic agents, 1 to 20 percent of foaming agents, 1 to 10 percent of foaming accelerators, 1 to 10 percent of curing agents and 0.5 to 5 percent of accelerants. After the raw materials are uniformly mixed, the materials are extruded and shaped by a rubber extrusion machine according to the required width and thickness dimension; then, a PE film and release paper are vertically pasted; the self-adhesion expansion structure adhesive tape can be obtained. The self-adhesion expansion structure adhesive tape has the advantages that the use is convenient; after the removal of the release paper, the self-adhesion expansion structure adhesive tape can be directly pasted onto a cold rolled steel plate. Through the raw material selection, the mechanical property of the self-adhesion expansion structure adhesive tape can be effectively improved; the damage mode of a bonding structure is improved. The self-adhesion expansion structure adhesive tape provides high-performance structure bonding for the bonding layer after the curing; the shearing intensity is greater than 9Mpa; the expansion rate is greater than 150 percent; the connection gap between metal plates can be effectively compensated.

Description

technical field [0001] The invention relates to an adhesive material, in particular to a self-adhesive expansion structural adhesive tape for automobiles and a preparation method thereof. Background technique [0002] Due to the needs of environmental protection and energy saving, the requirements for lightweight automobiles continue to increase. Modern body technology requires the use of lighter and stronger materials, and its connection technology has become particularly important. High-quality and efficient sheet metal technology that connects the body can increase body stiffness and durability, and improve vehicle noise, vibration and harshness (NVH). In recent years, more and more structural adhesives have been incorporated into new vehicle models. The fields of use of structural bonding in automotive construction include: 1. Connecting components and materials that cannot be welded or heat-sensitive; 2. Structural components that are difficult or inaccessible to weldi...

AI Technical Summary

Problems solved by technology

[0003] For the bonding parts with large gaps (gap thickness 1-10mm) of local sheet metal parts such as car side panels and roof sunroofs, traditional structural adhesives cannot be effectively bonded, and the paste adhesive is prone to slipping and falling off during construction.

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