High-speed spinning oil used for polyester pre-oriented yarn (POY)

Abstract

The invention relates to high-speed spinning oil used for polyester pre-oriented yarns (POY). The high-speed spinning oil used for the POY comprises a main part which contains more than twenty polyether type compounds of multiple components and multiple structures and accounts for 70-92% of the total mass, and the rest part is additive. A molecular structure of the polyether type compounds is RO[(EO)x / (PO)y]R', wherein end groups R and R' are H, or C1-C18 alkane, aryl, acyl or acylamino, or inorganic acid radical; [(EO)x / (PO)y] is a polyether chain segment composed of oxoethylene group and / or isopropoxy. The high-speed spinning oil used for the POY is applicable to polyester pre-oriented high-speed spinning and a subsequent textured yarn production technology and can give good smoothness and bundling property, overall viscosity-temperature-concentration characteristic and excellent thermal property to fibers, fewer broken filaments of the fibers are produced in the next drafting process, evenness and dyeing are uniform, little smoke is produced by a processing hot box, little white powder and coke are produced, a cleaning period is long, and product quality and stability are good.

Description

technical field [0001] The invention relates to an oil agent used in the spinning process of synthetic fibers, in particular to an oil agent used for polyester POY high-speed spinning. Background technique [0002] In my country, the trade name of PET polyester (polyethylene terephthalate) silk fabrics is called polyester. Polyester spinning generally adopts high-speed spinning-drawing and twisting process in China, that is, pre-oriented yarn or partially oriented yarn (POY, Pre-Oriented Yarn or Partially Oriented Yarn) and stretched textured yarn (DTY, Draw Texturing Yarn). Step combination, referred to as POY-DTY process. In order to make polyester POY have a higher degree of orientation and crystallinity, the spinning speed is usually in the range of 3000~4600 m / min. The faster the spinning speed, the higher the production efficiency. Polyester POY high-speed spinning requires that the spinning oil used should have good smoothness, bunching and antistatic properties, so...

AI Technical Summary

Problems solved by technology

[0004] At present, the common problems of polyester POY high-speed spinning oils are: the viscosity-temperature-viscosity characteristics of many polyether monomers are not ideal. Low viscosity, the oil on the fiber will splash on the hot roller under the action of centrifugal force. Long-term heating will easily lead to the formation of coke, which will affect the heat conduction efficiency of the heater and cause uneven stretching of the tow. The increase of fluff and broken ends affects production

However, monomers with smaller molecular weights generally have viscosity jumps, resulting in excessive viscosity fluctuations in the high-speed spinning process, which will also cause uneven oiling, and a large amount of coking on the hot plate will affect the quality of the silk.

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