BMC (Bulk molding compound) material for high-speed rails and production method thereof

Abstract

The invention discloses a BMC (Bulk molding compound) material for high-speed rails. The BMC material is prepared from resin, aluminum hydroxide, curing agents, release agents, glass fibers and anti-cracking agents, wherein the resin is a mixture of unsaturated resin and low shrink resin; the anti-cracking agents are PE (Polyethylene), NBR (Nitrile-butadiene rubber), PS (Polystyrene), PVAC (Polyvinyl acetate) or EVA (Ethylene-vinyl acetate copolymer). The invention further discloses a production method of the BMC material for the high-speed rails. According to the BMC material disclosed by theinvention, by adding the anti-cracking agents into the BMC material, when the BMC material is moulded, the anti-cracking agents can infiltrate into micro-cracks of the resin to fill the cracks, and abonding effect is achieved, so that the shrinkage of a resin material can be lowered, and the surface flatness of the material is improved, thereby reducing vibration during the use of a product; inaddition, the anti-cracking agents can improve the stability and fatigue resistance of the resin material under vibration and prolong the service life of the product.

Description

technical field [0001] The invention belongs to the technical field of high-speed rail materials, and in particular relates to a BMC material for high-speed rail and a manufacturing method thereof. Background technique [0002] China's high-speed rail export is of great significance, not just the "going out" of a single industry, but the "going out" of the entire industrial chain. Although the current market size is small, once it is recognized by overseas markets, it will reshape the global brand image of Made in China and drive the development of upstream and downstream segments of the industrial chain. For high-speed railways, higher requirements are put forward for the strength, fatigue resistance, lightweight, and manufacturability of new materials. The application of new materials is mainly in the structural parts of high-speed railway cars. [0003] Composite materials have already begun to be used in vehicles, and the amount is increasing, representing the future de...

AI Technical Summary

Problems solved by technology

However, the dispersion effect of aromatic phosphate in polyphenylene sulfide is not ideal, and it is easy to form a wrapping phenomenon in the pellets during production under the general process level, which directly affects the high-temperature mechanical properties

[0006] Chinese patent application 98809596.3 provides a method for manufacturing polyphenylene sulfide (PPS) composite materials modified by blending zinc oxide whiskers and glass fibers or carbon fibers with polyphenylene sulfide (PPS) resins, the purpose of which is to use zinc oxide As a corrosion inhibitor to improve the corrosion of metals, it can eliminate the adverse effects on mechanical and physical properties; but after adding zinc oxide, the tensile strength and elongation at break of the polyphenylene sulfide (PPS) composite injection molding made The rate is reduced, and its impact strength is also reduced

Images