High-damping reinforcing rubber sheet and preparation method thereof

Abstract

The invention discloses a high-damping reinforcing rubber sheet and a preparation method of the high-damping reinforcing rubber sheet. The rubber sheet is formed by compounding a bonding layer and a fiberglass reinforcing layer, wherein the bonding layer is prepared from the following raw materials in terms of mass percent: 10 percent to 15 percent of flexible epoxy resin, 5 percent to 8 percent of liquid epoxy resin, 10 percent to 30 percent of nonpolar rubber, 0.5 percent to 2 percent of curing agent, 2 percent to 6 percent of rubber auxiliary and 50 percent to 65 percent of functional filler. The preparation method comprises the following steps of firstly mixing the nonpolar rubber in a kneading machine for 5 to 10 min; then adding the rest raw materials into the kneading machine, and mixing for 15 to 30 min so as to obtain a bonding layer matrix composition; putting the bonding layer matrix composition into a rubber extruder for extruding the composition into a rubber sheet with a thickness of 2.0 to 2.5 mm; coating the rubber sheet with the fiberglass reinforcing layer, and pressing the rubber sheet 4 to 5 times in a reciprocating manner through a roller so as to obtain the high-damping reinforcing rubber sheet. The high-damping reinforcing rubber sheet has the advantages that damping is combined with reinforcement, so that the effects of high strength, good construction effect, low density, light weight, obvious reinforcement effect, high damping coefficient and strong ageing resistance are achieved, the weight of an automobile body can be reduced, the vibration and noise in an automobile can be reduced while the automobile body is reinforced, and the riding comfortableness is improved.

Description

technical field [0001] The invention belongs to the field of reinforcing films for thin steel plates of automobile bodies, and in particular relates to a film capable of both damping and shock absorption and reinforcing and a preparation method thereof. Background technique [0002] With the continuous improvement of people's awareness of environmental protection and energy saving, under the premise of ensuring safety, automobile lightweight has become the trend of the world's automobile development. At present, there are two main ways for automobile lightweight: [0003] 1) Use light and high-strength materials, such as aluminum alloy, magnesium alloy, high-strength steel, etc.; [0004] 2) Improve the structure of the car and reduce the amount of materials used, such as thinning the outer panel and hollowing the structural parts. [0005] But reducing the amount of materials will also bring a series of problems: [0006] 1) If the steel plate becomes thinner, the local r...

AI Technical Summary

Problems solved by technology

[0006] 1) If the steel plate becomes thinner, the local rigidity of the car body will decrease, and the impact energy absorption will be small in the event of an accidental collision, which will cause great safety hazards to the occupants of the car;

[0007] 2) The thinning of the outer panel makes large-area sheet metal parts such as doors, top covers, and side panels prone to greater vibration during driving, resulting in greater noise radiation

[0008] Chinese patent publication CN1433453A has described a kind of reinforcing film with oil-impregnated metal surface improvement, and it has the adhesive layer prepared by epoxy resin and rubber, and this film has poor damping effect under the condition of the same thickness 2.0mm; Chinese patent publication CN104962213A describes a kind of reinforcing film with better low-temperature oil-impregnated metal surface, which has better reinforcing effect, but the damping effect of the film is not good under the same thickness of 2.0mm; other patents all consider the damping and shock absorption of the reinforcing film