A preparation method based on graphene-enhanced flame-retardant recycled polyester staple fiber

Abstract

The invention provides a preparation method of a graphene based reinforced and flame-retarded recycled polyester staple fiber. The method comprises the following steps: preparing graphene master batch; preparing phosphate based halogen-free flame retardant master batch; weighing the graphene master batch and the phosphate based halogen-free flame retardant master batch, mixing with a recycled polyester raw material, drying, feeding molten dried raw materials into an impurity removal stirrer under the action of a screw extruder by a melt pump for carrying out homogenization impurity-removal treatment, feeding a homogenized and impurity-removal polyester melt into a secondary filter by the melt pump, enabling a filtered melt to pass through a mixed melt on a pipeline to enter a spinning manifold, carrying out drafting processing on a spun fiber to obtain the reinforced and flame-retarded recycled polyester fiber, cutting off bundles and packaging. The reinforced and flame-retarded recycled polyester chip has the good spinning forming property, the fiber quality is high, the using amount of a fire retardant can be effectively reduced under the synergistic effect of grapheme and the phosphate based flame retardant, the cost is reduced, the reinforcement effect can be achieved and the mechanical property of the fiber is effectively improved.

Description

technical field

[0001] The invention belongs to the field of recycled polyester fiber materials, in particular to a method for preparing graphene-based reinforced flame-retardant recycled polyester short fibers. Background technique

[0002] At present, recycled polyester fiber is strongly supported by various departments of the state and has developed rapidly due to its environmental protection, greenness, and obvious price competitive advantage (compared with virgin polyester fiber). Regenerated polyester fiber is obtained by removing bottle caps, labels and additives from polyester bottle flakes, and then using physical or chemical methods to process the bottle flakes. Polyester fiber is a kind of molten flammable fiber. It is necessary and urgent to carry out flame-retardant treatment on recycled polyester fiber to reduce its fire hazard.

[0003] The flame retardant modification methods of polyester mainly include several methods such as copolymerization, blending, and...

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