High-electrical-performance halogen-free flame-retardant reinforcement nylon composite material

Abstract

The invention discloses a high-electrical-performance halogen-free flame-retardant reinforcement nylon composite material. The material is prepared from, by weight, 40-60 parts of nylon resin, 25-35 parts of glass fibers, 4-10 parts of phosphorus-based flame retardant, 6-10 parts of polytetrafluoroethylene, 1-5 parts of nucleating agent, 2-5 parts of flexibilizer, 0.5-2 parts of flowing agent and0.5-5 parts of color masterbatch. High-viscosity nylon is matched with the nucleating agent, the flowing agent, polytetrafluoroethylene and the organic wrapping-type micro-adhesive red phosphorus flame retardant for use, the obtained material has excellent strength, rigidity, wear resistance, water resistance, heat stability and flame retardance, the forming efficiency is high, the surface finishdegree is high, and the defects such as color change or fiber emergence cannot be caused.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to a halogen-free flame-retardant reinforced nylon composite material with high electrical performance. Background technique [0002] Nylon main chain contains more polar amide groups, strong intermolecular hydrogen bonding, high crystallinity and excellent comprehensive performance, so it is widely used in automobiles, electronics, transportation, machine manufacturing, communications and daily necessities, especially nylon 6 and nylon 66 have the largest market share. One type of glass fiber reinforced nylon material has high mechanical strength, good heat resistance and fatigue resistance, and low molding shrinkage, so it has attracted much attention and has a very broad market prospect. [0003] At present, the use of glass fiber reinforced nylon still has many technical bottlenecks that limit its application. On the one hand, there is a "candle wick effect" in nylon...

AI Technical Summary

Problems solved by technology

The existing technology mostly uses microencapsulated red phosphorus masterbatch, and the secondary processing will reduce the performance of flame retardant and nylon. In addition, the fluidity of nylon is not good. In particular, some applications need to add a large amount of pigments and fillers, resulting in melt The viscosity is higher, and the red phosphorus coating layer is easily damaged under the action of high temperature and strong shear of the screw, and some fillers have high polarity and large specific surface area, which will further increase the water absorption rate, which is not conducive to the safe use of materials

On the other hand, ordinary short glass fibers affect the impact properties. In order to overcome this disadvantage, the usual method is to add toughening agents, but the improvement of impact strength by simply adding toughening agents is limited, but the tensile strength and rigidity are significantly improved. decline

In addition, glass fiber reinforced nylon composites are prone to defects such as discoloration and floating fibers during subsequent processing, so processing modification is required

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