Modified PET polyester as well as preparation method and application thereof

Abstract

The invention relates to modified PET (Polyethylene terephthalate) polyester as well as a preparation method and application thereof, and belongs to the field of modified polyester. The modified PET polyester comprises aerogel particles and polyethylene terephthalate; the aerogel particles are dispersed between the molecular chains of the polyethylene terephthalate uniformly; the particle size of the aerogel particles is 2 to 3 microns; the content of the aerogel particles in the modified PET polyester is 1 to 10 percent by weight. Modified PET is prepared by the steps of adding the aerogel powder into glycol, putting into a grinding machine, grinding to prepare mixed slurry, mixing the mixed slurry and terephthalic acid, and performing esterification reaction and polymerization reaction. Modified PET fiber is prepared by slicing the modified PET, metering, spinning, cooling, applying oil, stretching, performing heat setting and performing winding formation. The aerogel particles are introduced before polymerization of the PET polyester, so the prepared PET has high spinnability, can produce modified PET fibers with various thickness, has wide application range and can meet the production requirement of various fabrics.

Description

technical field [0001] The invention belongs to the field of modified polyester, and in particular relates to an airgel modified PET polyester, a preparation method and application thereof. Background technique [0002] Polyester (PET fiber) is the world's largest and most widely used synthetic fiber variety, and polyester accounts for more than 60% of the world's synthetic fiber production. It is widely used in textiles such as clothing, bedding, various decorative fabrics, special fabrics for national defense and other industrial fiber products, such as filter materials, insulating materials, tire cords, conveyor belts, etc. With the sustained and rapid growth of the domestic economy and the continuous improvement of the consumption capacity of domestic residents, the demand for polyester staple fibers in the domestic region is also increasing. The production capacity of polyester series products in China is growing at an alarming rate, and the rapid growth of polyester f...

AI Technical Summary

Problems solved by technology

However, when directly mixing airgel powder and polymer resin, there will be problems of uneven mixing, and the problem of lower tensile strength will occur in subsequent spinning, and it is easy to break and fluff. Usually only thicker fibers can be produced. Limits large-scale application

[0006] The Chinese invention patent application with the publication number CN102557577A provides a preparation and method of a silica airgel composite material, using tetraethyl orthosilicate as a silicon source, and industrially produced glass fiber or fiber cotton material as a reinforcement. The prepared silica airgel composite has the characteristics of high porosity, high specific surface area, low density, low dielectric constant and low thermal conductivity, and has good formability, but tetraethyl orthosilicate is toxic and expensive , silicon alkoxide is suitable for industrial production as a silicon source