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Finisher nozzle and finisher assembly including the same

A technology for finishers and nozzles, applied in the field of finisher nozzles and finisher components including said finisher nozzles, capable of solving problems such as deterioration, expensive labor, and density

Active Publication Date: 2014-11-05
INVISTA TEXTILES (U K) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the polymer melt (e.g., polymer fluid) from the flasher contains a considerable amount of moisture as water vapor, finishing to a higher temperature than by Relatively high viscosities (e.g., 50%) that can be obtained at water vapor equilibrium are large and relatively high viscosities are expensive and labor intensive operations
The increased time required to produce high viscosity polymer from the steam-laden mixed stream of steam and polymer fluid from the flasher often results in gelled or otherwise degraded polymer

Method used

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  • Finisher nozzle and finisher assembly including the same
  • Finisher nozzle and finisher assembly including the same
  • Finisher nozzle and finisher assembly including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1 - Finisher assembly having a finisher nozzle with a tapered barrel.

[0059] In a continuous nylon 6,6 manufacturing process, adipic acid and hexamethylenediamine are mixed in approximately equimolar ratios in water in a salt bath to form an aqueous mixture containing nylon 6,6 salt with about 50% water by weight . The brine solution was delivered to the evaporator at about 105 L / min. The evaporator heats the brine solution to about 125-135°C (130°C) and removes water from the heated brine solution such that the water concentration reaches about 30% by weight. The evaporated salt mixture was delivered to the reactor at about 75 L / min. The reactor brings the evaporated salt mixture to a temperature of about 218-250°C (235°C), thereby allowing the reactor to further remove water from the heated evaporated salt mixture, bring the water concentration to about 10% by weight, and allow the salt to further polymerization. The reacted mixture was transferred to ...

Embodiment 2

[0063] Example 2 - Finisher Assembly with Finisher Nozzle with Constant Inner Perimeter Barrel.

[0064] The continuous nylon 6,6 manufacturing process of Example 1 was carried out, but using a finisher nozzle, which was 5 m long and had a cylindrical barrel with a constant barrel inner circumference of 0.3 m between the nozzle inlet port and the nozzle outlet port, to Such that the entire length of the opposing walls of the cylindrical barrel between the nozzle inlet port and the nozzle outlet port form an angle of 0 degrees between each other. A separator spirals within the finisher nozzle and is spaced from the constant barrel inner perimeter. The finisher nozzle separates water vapor from the polymer fluid as it is delivered to the melt pool within the finisher vessel. The finisher vessel was inspected after 10 days of operation. There is evidence of reduced splashing of polymer fluid along the inner vessel wall of the finisher vessel on the shoreline of the melt pool ...

Embodiment 3

[0068] Example 3 - Finisher Nozzle with Separator Helix Connected Along the Inner Perimeter of the Barrel at a First Frequency cleanliness.

[0069] The continuous nylon 6,6 manufacturing process of Example 1 was carried out, but using a finisher nozzle with a finisher nozzle separator helix having 10 helical segments along the A line extending along the inside of the barrel and parallel to the axis of the helix is ​​spot welded to the inner periphery of the barrel. The finisher nozzle, including the separator helix and each helix segment, was heated to a cleaning temperature of 350°C during the cleaning process. Inspection of the separator helix revealed warping of the helix segments and separator helix such that each segment not spot welded to the barrel was out of alignment with the original axis of the helix by 0.5-3 degrees.

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Abstract

A polymer finisher assembly having a finisher nozzle includes a vessel including an outlet orifice and an inlet orifice. The finisher nozzle extends through the inlet orifice of the vessel. The finisher nozzle includes an isometric barrel extending between a nozzle inlet port and a nozzle outlet port. A separator helix is within the isometric barrel. The separator helix separates a mixed flow of steam and polymer fluid and directs steam toward a barrel inner perimeter and directs the polymer fluid separated from the steam toward a helix axis and the nozzle outlet port. The isometric barrel and the separator helix cooperate to confine spattering of polymer fluid separated from steam to the melt pool and isolate an inner vessel wall of the vessel from spattering.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 61 / 818,345, filed May 1, 2013, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a finisher nozzle and a finisher assembly comprising the same. Background technique [0004] Commercial preparation of linear polycondensates typically involves heating monomeric starting materials to allow gradual condensation of the polymer. In one example, the process is carried out in several stages with intermediate formation of a low molecular weight, low viscosity polymeric fluid, such as in a flasher, by removal of volatiles. The low molecular weight, low viscosity polymerization fluid then passes through a finishing zone controlled with multiple vacuums and dwell times and temperatures to allow the polymer to reach the desired final molecular weight and visco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/26B01J4/00B05B1/26
CPCB01F7/245C08G69/02B01J2219/00094B01J4/002B01J19/20C08F6/00B01D1/00B01D1/0082B01D3/06C08G69/28
Inventor 查尔斯·R·克尔曼托马斯·A·米茨卡约翰·P·普安萨蒂加里·R·韦斯特
Owner INVISTA TEXTILES (U K) LTD
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