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Production process of blending type regeneration polyester flame retardant staple fiber

A recycled polyester and production process technology, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the melting of single-component polyester artificial filaments, and filament raw materials, can solve the problems of complex process operations and high production costs, and achieve production Simple process, low production cost and good spinnability

Active Publication Date: 2013-06-26
浙江安顺化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production methods of the flame-retardant polyester fiber products of the above-mentioned companies are to add reactive phosphate ester polymers during polyester polymerization, and graft phosphorus molecules on the molecular chains of polyester to modify them to obtain flame-retardant effects. , is a flame-retardant polyester fiber of the copolymerization type. The disadvantages are: the process operation is relatively complicated and the production cost is high.
[0004] The invention of CN101104963A discloses a production method of phosphorus-based polyester flame-retardant fibers. Polyester and phosphorus-based flame-retardants are copolymerized to form phosphorus-based polyester flame-retardant fibers. The disadvantages are: the process operation is relatively complicated, high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put 100kg of white recycled polyester bottle flakes into a drum for drying at 140°C, and at the same time put 5kg of phosphorus-based flame retardant in a constant temperature vacuum drying oven to dry at 80°C. When the moisture content of the fuel is below 50ppm, mix the recycled polyester bottle flakes with the phosphorus flame retardant evenly.

[0032] (2) Feed the mixture of recycled polyester bottle flakes and phosphorus-based flame retardant into the screw extruder of the spinning production line, heat and melt to form a melt, the melt passes through a filter, and is metered by a spinning pump at 8Mpa The pressure is ejected through the spinneret holes, and the speed at which the filaments are ejected from the spinneret holes is 1100-1400m / min (1100m / min in this embodiment), and the primary fibers are formed after cooling and solidification; the screw rods of the screw extruder are seven The heating temperatures of the zones are: 270-275°C, 275-280°C, 280-285...

Embodiment 2

[0038] (1) Put 100kg of white regenerated polyester bottle flakes into a drum for drying at 145°C, and at the same time put 12kg of phosphorus-based flame retardants into a constant temperature vacuum oven to dry at 85°C. When the moisture content of the fuel is below 50ppm, mix the recycled polyester bottle flakes with the phosphorus flame retardant evenly.

[0039] (2) Feed the mixture of recycled polyester bottle flakes and phosphorus-based flame retardant into the screw extruder of the spinning production line, heat and melt to form a melt, the melt passes through a filter, and is metered by a spinning pump at 10Mpa The pressure is ejected through the spinneret holes, and the speed at which the filaments are ejected from the spinneret holes is 1100-1400m / min (1400m / min in this embodiment), and the primary fibers are formed after cooling and solidification; the screw rods of the screw extruder are seven The heating temperatures of the zones are: 270-275°C, 275-280°C, 280-28...

Embodiment 3

[0045] (1) Put 100kg of white recycled polyester bottle flakes into a drum for drying at 142°C, and at the same time put 8kg of phosphorus-based flame retardant in a constant temperature vacuum drying oven to dry at 82°C. When the moisture content of the fuel is below 50ppm, mix the recycled polyester bottle flakes with the phosphorus flame retardant evenly.

[0046] (2) Feed the mixture of recycled polyester bottle flakes and phosphorus-based flame retardant into the screw extruder of the spinning production line, heat and melt to form a melt, the melt passes through a filter, and is metered by a spinning pump at 9Mpa The pressure is ejected through the spinneret holes, and the speed at which the filaments are ejected from the spinneret holes is 1100-1400m / min (1200m / min in this embodiment), and the primary fibers are formed after cooling and solidification; the screw rods of the screw extruder are seven The heating temperatures of the zones are: 270-275°C, 275-280°C, 280-285...

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Abstract

The invention relates to the technical field of staple fiber production and provides a production process of a blending type regeneration polyester flame retardant staple fiber. The production process comprises the following steps of: respectively drying a regeneration polyester bottle chip and a phosphorus based flame retardant; uniformly mixing the regeneration polyester bottle chip with the phosphorus based flame retardant when the moisture contents of the regeneration polyester bottle chip and the phosphorus based flame retardant are both less than 50ppm (parts per million), feeding the mixture into a screw extruder of a spinning production line, heating for fusing to a melt, spraying by a spinneret hole, cooling and solidifying to form nascent fiber; applying oil on the nascent fiber, winding and feeding the nascent fiber to a silk flock cylinder to form nascent silk flock; drafting the nascent silk flock after being collected to 10-13 million deniers as the total drafting times is 3.2-3.4 times, curling the silk flock for molding after preheating the silk flock, spraying by a flame retardant fiber oil agent, carrying out heat setting in a relaxation heat setting oven, cutting and packing in a packing machine to form a finished product. The production process is environmentally-friendly, energy-saving, low in production cost and simple.

Description

technical field [0001] The invention relates to the technical field of short fiber production, in particular to a production process of blended recycled polyester flame-retardant short fibers. Background technique [0002] Polyester staple fibers are widely used in various industries. However, the limiting oxygen index of polyester fiber is only about 21 when it is heated and burned, which does not meet the requirements of flame retardant standards. If it can be made into flame-retardant fiber, then the processed fabric, especially the decorative material bedding whose consumption continues to increase, can effectively prevent fire accidents or reduce fire losses. [0003] Since the early 1970s, people began to pay attention to the research and development of flame-retardant polyester fibers. There are many flame retardants that endow polyester fibers with flame retardant properties. According to the classification of flame retardant elements, they can be divided into two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/07D01D1/04D01D5/08D01D5/14D01D10/02
Inventor 张丽敏方国平
Owner 浙江安顺化纤有限公司