High-strength carbon fiber reinforced halogen-free flame-retardant PA6 (Polyamide) composite material and preparation method thereof

Abstract

The invention relates to a high-strength carbon fiber reinforced halogen-free flame-retardant PA6 (Polyamide) composite material and a preparation method thereof. The composite material is composed of the following components by weight percent: 47.1-64.1% of PA6, 15-20% of halogen-free flame retardant, 3-5% of expansive type synergist, 10-30% of carbon fiber, 2-4% of graft type toughening modifier, 0.3% of couping agent, 0.4% of antioxidant and 0.2-0.5% of lubricating dispersant. The invention also relates to the preparation method of the high-strength carbon fiber reinforced halogen-free flame-retardant PA6 composite material. The nylon composite material provided by the invention is high in strength, high in rigidity, good in electric conductivity, halogen-free and flame-retardant, good in appearance and excellent in combination properties; the high-strength carbon fiber reinforced halogen-free flame-retardant PA6 composite material is a functionally integrated material and can be potentially used for substituting for the aluminium and magnesium metal materials used by the shells of electrical and electronic parts at present, and thus makes up for the gap in the field of similar products.

Description

technical field [0001] The invention relates to a nylon composite material, in particular to a high-strength carbon fiber reinforced halogen-free flame-retardant PA6 composite material and a preparation method thereof. Background technique [0002] Polyamide has good mechanical strength and rigidity, good wear resistance and other advantages, and is widely used in automotive parts, mechanical parts, electrical and electronic fields, etc. It is the first of the five major engineering plastics, replacing traditional metal materials in many applications . The flame retardant grade of pure nylon fiber-added material is HB grade, which needs to be modified to be applied to the field of flame retardant requirements. The traditional bromine antimony system has high flame retardant efficiency and good performance retention rate, but it is easy to form secondary pollution and gradually eliminated. The concept of environmental protection of modern humans is getting stronger and stro...

AI Technical Summary

Problems solved by technology

Although red phosphorus reinforced nylon has good flame retardant efficiency, it may cause the risk of corrosion damage to the product due to the precipitation of flame retardants. Foreign halogen-free flame retardants have good overall performance but are too expensive, which limits their use.

[0003] In terms of antistatic modification of nylon materials, adding a low molecular weight antistatic agent is the most common antistatic measure. This modified material mainly uses the moisture adsorbed by the antistatic agent on the surface of the material to reduce the surface resistivity, so the durability is poor, and it is not durable. Washing is highly dependent on the humidity of the environment. Some foreign scholars compound a certain amount of metal salt sol in the polymer containing ether bonds, and the metal ions cooperate with the ether bonds of the polyether block to form an ion-conducting network inside. Improve the electrical conductivity and enhance the electrical conductivity of the polymer. These two methods have different degrees of decline in the heat-resistant temperature and surface properties of the material, and are not suitable for reinforcing reinforced materials.

However, polymers modified by carbon black and metal fillers can obtain relatively good permanent antistatic properties, but they are often added in large amounts, resulting in large performance damage and difficult processing.