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Polyester melt direct spinning method and system with online addition of functional modifier

A polyester melt and functional technology, applied in the field of synthetic fiber production, can solve the problems of low uniformity of fiber products, complicated implementation process and high processing cost, and achieve the effects of reducing processing cost, low energy consumption and improving effectiveness

Active Publication Date: 2016-05-25
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The shortcomings of the above-mentioned technology are high processing cost, high energy consumption, high consumption, and the uniformity of the final fiber product is lower than that of conventional polyester staple fiber, and the implementation process is relatively complicated. Therefore, the functional polyester modified by this technology Polyester staple fiber has not yet become a growth point for the benefits of synthetic fiber enterprises

Method used

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  • Polyester melt direct spinning method and system with online addition of functional modifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Adding the polyester melt direct spinning system of functional modifier on-line

[0020] The polyester melt direct spinning system with online addition of functional modifiers includes polyester melt main line and melt branch line;

[0021] Described polyester melt main line comprises polyester melt main line 1 and static mixer 7;

[0022] The melt branch pipeline includes a melt branch pipe stop valve 2, a metering pump 3, a dynamic twin-screw mixer 4, a discharge metering pump 5, and a functional melt stop valve 6 connected in sequence. The cut-off valve 2 is connected to the main line of polyester melt, and the connection position is located after the outlet of the polyester final polymerization tank. After the functional melt stop valve 6 is connected to the main line of polyester melt 1, it is connected to the static mixer 7 The position where the functional melt stop valve 6 is connected to the polyester melt main line 1 is located after the position wh...

Embodiment 2

[0023] Embodiment 2 The polyester melt direct spinning method of adding functional modifier on-line produces anti-ultraviolet polyester staple fiber

[0024] The intrinsic viscosity IV of the melt at the exit of the polyester final polymerization kettle is 0.670dl / g, the content of the anti-ultraviolet additive in the target polyester staple fiber is 3.0wt%, and quasi-nanometer rutile type (RutilR type) titanium dioxide is used, with an average particle size of 200nm.

[0025] The melt delivery volume of the polyester melt main line 1 is 100 tons / day, the melt temperature is 288°C, the melt pipe pressure is 10MPa, the melt branch pipe stop valve 2 is opened, the inlet pressure of the metering pump 3 is 9.8MPa, and the discharge The amount is 8 tons / day, the heating temperature (electric heating) of the dynamic twin-screw mixer 4 is 286°C, the injection amount of the additive metering device 8 with a syringe is 3 tons / day, the injection pressure is 10MPa, and the output metering...

Embodiment 3

[0035] The steps and the amount of raw materials added in this embodiment are consistent with those in Example 2, the difference being that the output of the metering pump 3 is 5 tons / day, the injection amount of additives is 2.5 tons / day, and the finally measured defect content is 0.3mg / 100g .

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Abstract

The invention provides a polyester melt direct spinning method by online adding functional modifiers. The melt with 5%-10%wt of conveying capacity is taken out on a melt main pipeline and enters a dynamic mixer, the functional modifiers are added, a functional melt is generated and returns to the melt main pipeline, and the functional melt and other melts on the main pipeline enter an efficient static mixer on the melt main pipeline and are mixed again to obtain the functional melt for spinning. The invention further discloses a polyester melt direct spinning system by online adding the functional modifiers. The melt with 5%-10% of the conveying capacity is taken out on the polyester melt main pipeline, so that production of the functional melt and production of polyester are relatively independent, the basic performance of the melt is consistent with that of a melt produced by large-scale polyester, the problem of poor uniformity of the functional melt is solved by mixing twice, a re-cooling and pelleting process of the melt is omitted, machining cost is greatly reduced, the heating capacity of the melt entering the dynamic mixer is reduced, and energy consumption is low.

Description

technical field [0001] The invention relates to a polyester melt direct spinning method and system with online addition of a functional modifier, and belongs to the technical field of synthetic fiber production. Background technique [0002] PET polyester production technology has developed rapidly since the 1990s. The polymerization scale of conventional direct spinning to produce short fibers has reached 900 tons per day, which can supply 4 to 5 direct spinning production lines respectively. The scale effect is obvious and the product quality is stable. The processing costs of polymerization and spinning are low. [0003] Entering the 21st century, there is a serious imbalance between supply and demand in the synthetic fiber textile processing chain worldwide, and the market competitiveness of conventional polyester staple fibers has seriously declined. [0004] During the same period, the research and development of functional polyester fibers achieved effective results....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01F1/02D01D1/00D01D13/00
CPCD01D1/00D01D5/08D01D13/00D01F1/02D10B2331/04
Inventor 陶国平浦金龙
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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