Abstract: A hybrid cord, comprising (a) a core yarn consisting of meta-aromatic polyamide fibers, and (b) at least one wrapping yarn consisting of para-aromatic polyamide fibers that warps around the core yarn at a helical angle, wherein (i) the core yarn makes up 20-60% by weight and the wrapping yarn makes up 40-80% by weight of the hybrid cord, based on the total weight of the hybrid cord, (ii) the twist multiplier of the core yarn is 0-0.5, the twist multiplier of the hybrid cord is 4.5-12; and the twist per meter (tpm) ratio between the at least one wrapping yarn and the hybrid cord ranges from 0.8 to 1.2, and (iii) the helical angle of the wrapping yarn is 10-60 degrees.

Abstract: The present patent discloses a kind of laminated composite material, wherein it comprises at least a layer of elastomer and a layer of textile of aromatic polyamide fiber, and the surface of said textile of aromatic polyamide fiber is processed by silane. It also discloses the preparation method of said laminated composite material as well as its application in making the windshield connecting rail cars as well as the application in making rubber pipeline.