Preparation method of flame-retardant PET fiber

Abstract

The invention relates to a preparation method of flame-retardant PET fiber. The preparation method comprises the following steps: first, wrapping a magnesium hydroxide coated carbon microsphere flame retardant with a PET layer to obtain an encapsulated magnesium hydroxide coated carbon microsphere flame retardant, so as to effectively improve the dispersity and the compatibility of the flame retardant in a polymer substrate, and improve the spinnability of a material; second, adding 1 wt% of the encapsulated magnesium hydroxide coated carbon microsphere flame retardant in the preparation process of PET fiber, carrying out melt blending and spinning to prepare magnesium hydroxide coated carbon microsphere / polyethylene glycol terephthalate fiber, and adjusting the melt blending and spinning technology reasonably to further improve the spinnability of the flame-retardant PET fiber. The flame-retardant PET fiber prepared according to the preparation method has the advantages that not only is the flame retardant property improved, but also the own physical and chemical properties of fiber are prevented from being damaged; the limited oxygen index of the obtained fiber can reach up to 30 percent or higher; the molten drop quantity and the smoke quantity are greatly reduced; the mechanical property and the hygroscopicity are favorable; requirements of environmental protection and practical use are met.

Description

Technical field [0001] The invention belongs to the technical field of functional fiber preparation, and relates to a preparation method of flame-retardant polyethylene terephthalate fiber. Background technique [0002] According to foreign sources, half of the fires are caused by textiles. [0003] Polyethylene terephthalate fiber, referred to as PET fiber, commonly known as polyester, has the advantages of excellent mechanical properties, non-toxic and odorless, good hygiene and safety, oil resistance, gas barrier, etc., and it is the most widely used chemical fiber at present. one. However, PET has a low limiting oxygen index and is a flammable fiber, making it a huge safety hazard in its application. [0004] At present, all parts of the world are competing to develop PET flame-retardant products, but the existing flame-retardant PET often has the following problems in practical applications: some flame-retardant PET will produce dense smoke and toxic and harmful gases when bur...

AI Technical Summary

Problems solved by technology

However, PET has a low limiting oxygen index and is a flammable fiber, which makes it a huge safety hazard in its application.

[0004] At present, all parts of the world are competing to develop PET flame-retardant products, but the existing flame-retardant PETs often have the following problems in practical applications: some flame-retardant PETs will produce thick smoke and toxic and harmful gases when burned; some flame-retardant PETs have Excellent flame retardant and smoke suppression functions, but the mechanical properties of the material itself have dropped too much, and it is difficult to form fibers, which is difficult to meet the actual use requirements

However, the flame retardant also has the problem that the spinnability of the fiber will be deteriorated and the mechanical properties of the spun fiber will be reduced.

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