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Kvlar Fibre Advantages And Disadvantages

985 Words4 Pages

Introduction: Due to increasing need for innovation and high performance of engineering products, new advanced materials are being developed. One of the outcomes is the combination of the available materials to give better properties which the other material doesn’t have. From the first invention of composite by Egyptians to create mud and straw for strong building to till now many composite materials have come up to meet the human’s needs. In this study, we will concentrate on Kevlar fiber reinforced plastic composite. The first Kevlar was developed by Stephanie Kwolek at DuPont in 1965. From then, many industries have started to produce Kevlar because of its low density and high strength.
Kevlar properties, manufacture and application: Kevlar is an aramid (organic) fiber first developed at Dupont. Due to high aligned rod like polymeric molecules, it has high strength and stiffness …show more content…

Kevlar fiber may be in any one of the following forms like roving, veil mat, chopped strands or woven fabrics. The orientation also affects the properties a lot. They can be manufactured by any one of the process/methods listed below depending on the form of Kevlar fiber.

These Kevlar reinforced composites have advantage over other polymer based composite in low density and high tensile strength and thus high specific strength. Kevlar fiber has high grip to the polymer matrix and fiber pull out take large amount of energy. This makes them promising materials for aerospace and automobile materials.
The fiber matrix interfacial adhesion is increased by the following:
 Increasing the wettability of fiber surface
 Removing weak boundaries
 Allowing physical entanglement or mechanical interlocking of fiber and matrix
 Increasing the active sites on fiber for chemical bonding
 Applying thin layer of coupling agent on

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