Preparation method for spinning flame retardation polyester filament using flask return

A technology of flame-retardant polyester and bottle flakes, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the melting of filament raw materials, and melt spinning, which can solve the problems of no reports of flame-retardant polyester filaments and achieve good flame-retardant properties , high safety effect

Inactive Publication Date: 2017-10-27
仪征市仲兴环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there is no report about spinning flame-retardant polyester filament (POY176dtex / 96f) with recycled bottle flakes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A method for preparing flame retardant polyester filaments (POY176dtex / 96f) with bottle flakes returned from the present invention is to dry the recycled polyester bottle flakes, and then send the dried polyester bottle flakes back through the pipeline into the extruder. It is melted and extruded in the machine, spun through a spinneret, and the tow is cooled and oiled by air blowing, and then wound by a winding head to obtain bottle flake recycled flame-retardant polyester filament (POY176dtex / 96f). Specifically include the following steps:

[0017] Step 1. Pre-crystallize the material. The material is polyester bottle flakes; specifically, dry hot air is used for pre-crystallization; Temperature The temperature is 170-178°C, the air dew point is less than or equal to -70°C, the moisture content of the material is 40ppm, and the drying time is 4-8 hours.

[0018] Step 2. Screw feeding of materials: firstly dry the polyester bottle flakes with hot air, and then feed th...

Embodiment 1

[0025] A method for preparing flame-retardant polyester filament (POY176dtex / 96f) spun from bottle flakes, comprising the following steps:

[0026] Step 1. Pre-crystallize the material. The material is polyester bottle flakes; specifically, dry hot air is used for pre-crystallization; when the material is pre-crystallized, the pre-crystallization temperature is 170°C, and the temperature of the dry hot air

[0027] The temperature is 172°C, the air dew point is -70°C, the moisture content of the material is 40ppm, and the drying time is 6 hours.

[0028] Step 2. Screw feeding of materials: firstly dry the polyester bottle flakes with hot air, and then feed the dried polyester bottle flakes back into the screw extruder through the pipeline; when the materials are screw fed, the Materials

[0029] Recycling for PET (polyethylene terephthalate) bottle flakes.

[0030] Step 3: The flame-retardant masterbatch is added quantitatively. After the flame-retardant masterbatch is dried...

Embodiment 2

[0039] A method for preparing flame-retardant polyester filament (POY176dtex / 96f) spun from bottle flakes, comprising the following steps:

[0040] Step 1. Pre-crystallize the material. The material is polyester bottle flakes; specifically, dry hot air is used for pre-crystallization; when the material is pre-crystallized, the pre-crystallization temperature is 172 ° C, and the temperature of the dry hot air is

[0041] The temperature is 174°C, the air dew point is -60°C, the moisture content of the material is 40ppm, and the drying time is 5 hours.

[0042] Step 2. Material feeding by screw: first dry the polyester bottle flakes with hot air, and then dry the dried

[0043] The polyester bottle flakes are fed back into the screw extruder through the pipeline; when the material is fed into the screw, the material is

[0044] PET (polyethylene terephthalate) bottle flakes return.

[0045] Step 3: The flame-retardant masterbatch is added quantitatively. After the flame-retard...

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Abstract

The invention discloses a method for preparing flame-retardant polyester filaments spun from recycled bottle flakes. It includes the following steps: Step 1. Pre-crystallize the material, which is polyester bottle flakes; use dry hot air for pre-crystallization; Step 2, feed the material by screw: the polyester bottle flakes are dried and passed through the pipeline Feed in the screw extruder; step 3 add the flame retardant masterbatch quantitatively, remove the moisture after the flame retardant masterbatch is dried, and quantitatively add it to the screw feed port; step 4, filter, and melt the The material enters the reaction kettle for viscosification and then filters to ensure the continuous production of spinning and the constant pressure of the melt; step 5, spinning, the mixture from the filter enters the spinning assembly, and passes through the spinning assembly from The spinneret is sprayed out, cooled by side blowing, oiled, and then coiled and formed. The filament filaments prepared by the invention have good flame retardancy, high safety, high strength, good durability and dimensional stability.

Description

technical field [0001] The invention belongs to the technical field of fiber preparation, in particular to a method for preparing flame-retardant polyester filament (POY176dtex / 96f) spun from bottle flakes. Background technique [0002] Flame-retardant polyester filament yarn (POY176dtex / 96f) spun from bottle flakes is specifically: [0003] 1. The safety performance is good, the fabric will not spontaneously ignite, and it will automatically extinguish when it leaves the fire source, without irritating smell. [0004] 2. Stable strength: Flame-retardant polyester filament (POY176dtex / 96f) spun from bottle flakes has good tow strength, reaching 2.2CN / dtex. Higher strength can ensure higher stress of filaments, which is suitable for later use . [0005] 3. Dimensional stability: the filament has good dimensional stability and will not affect the size of the product due to time changes [0006] In the prior art, there is no report about spinning flame-retardant polyester fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/04D01D5/08D01F6/92D01F1/07
CPCD01D1/04D01D5/08D01F1/07D01F6/92
Inventor 窦宝盛胡晓龙邹后林万宏斌马达飞周天一
Owner 仪征市仲兴环保科技有限公司
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