Floating fiber-free flame-retardant PC/ABS composite material

Abstract

The invention provides a floating fiber-free PC / ABS composite material. The floating fiber-free PC / ABS composite material comprises the following components: 50-80 parts of PC; 20-50 parts of ABS; 10-30 parts of glass fibers; 2-10 parts of a flow modifier; 1-10 parts of a flame retardant; 0-0.5 part of an antioxidant; and 0-0.5 part of a weather-resistant agent; the flowing property, flame retardant property and mechanical property of the obtained PC / ABS composite material are improved, and no floating fiber exists on the surface of the material.

Description

technical field [0001] The invention relates to a flame-retardant material, in particular to a flame-retardant PC / ABS composite material without floating fibers. Background technique [0002] Polycarbonate (PC) is a thermoplastic engineering plastic with excellent comprehensive properties. It has outstanding impact resistance, excellent mechanical properties and flame retardancy, but it also has the following disadvantages: high melt viscosity and poor processing fluidity , and sensitive to notch, poor dimensional stability, poor solvent resistance. [0003] ABS resin is a copolymer of three monomers of acrylonitrile (A), butadiene (B) and styrene (S). ABS resin maintains the excellent electrical properties and easy processability of styrene, and increases elasticity, Strength (characteristics of butadiene), heat resistance and corrosion resistance (excellent performance of acrylonitrile), and high surface hardness, good chemical resistance, and by changing the ratio of the...

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Problems solved by technology

[0002] Polycarbonate (PC) is a kind of thermoplastic engineering plastic with excellent comprehensive performance, which has the characteristics of outstanding impact resistance, excellent mechanical properties and flame retardancy , but there are also the following disadvantages: high melt viscosity, poor processing fluidity, and sensitivity to notches, poor dimensional stability, and poor solvent resistance

[0008]However, in the above schemes, a large amount of flame retardants and various additives are added, the compatibility between the flame retardants and the matrix is ​​not good, and the dispersion is not uniform. Moreover, the addition of various additives will inevitably affect the flow properties of composite materials.

[0009] Moreover, glass fibers are often added to PC / ABS composite materials, which can greatly improve its mechanical strength, dimensional stability and long-term service temperature while reducing costs. At the same time, it greatly reduces its sensitivity to notch, thereby expanding its scope of application, and can replace wood and metal in many fields. However, due to the uneven dispersion of glass fibers, and in the process of plastic melt flow, glass fibers and resins The fluidity is different, and the mass density is also different, so that the two have a tendency to separate. The glass fiber with low density floats to the surface, and the resin with high density sinks into the inside, thus forming the phenomenon of glass fiber exposure, which limits its appearance. use of software

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