Polyester fiber and false twisted yarn made thereof
A technology of polyester fiber and false twist deformation, which is applied in the field of false twist textured yarn
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Embodiment 1
[0181] Add the mixture of 100 parts (by mass) dimethyl terephthalate and 70 parts (by mass) ethylene glycol to the stainless steel reactor capable of reacting under pressure, then add 0.009 parts (by mass) by mass) tetra-n-butyl titanate. The resulting reaction mixture was subjected to transesterification under a pressure of 0.07 MPa while heating to 140°C to 240°C. After the reaction was completed, 0.035 parts of triethyl phosphonoacetate was mixed into the reaction product.
[0182] The reaction product containing diethyl terephthalate is placed in a polycondensation reactor, and heated to 290°C under high vacuum 26.67Pa or lower to carry out polycondensation reaction of diethyl terephthalate, preparation characteristics A polyester polymer with a viscosity of 0.60 and a diethylene glycol content of 1.5%. The polyester polymer is molded into chips. Phosphorous element M of polyester polymer P The value is 30, titanium element M Ti Value is 5, M P / M Ti The ratio is 6,...
Embodiment 2
[0198] Catalyst preparation
[0199] 919 g of ethylene glycol was stirred and mixed with 10 g of acetic acid. The resulting mixture was mixed with 71 g of tetrabutoxytitanium to provide a clear solution of the titanium compound in ethylene glycol. Separately, 34.5 g of monolauryl phosphate was mixed into 656 g of ethylene glycol while heating to 100° C. and stirring to provide a clear solution.
[0200] The above two transparent solutions were mixed with each other at 100° C., and the resulting mixture was stirred for 1 hour to give a white cloudy liquid. In this reaction, the mixing ratio of the two transparent solutions was controlled so that the amount of phosphorus atoms in the transparent titanium compound solution was 2.0 moles per mole of titanium atoms in the transparent phosphorus compound solution. The resulting white deposit was collected by filtration, washed with water and dried. The dried product was used as a catalyst, called TPI-2.0 catalyst.
[0201] Polye...
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