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Method for producing flat filaments from polyester chips

A technology of polyester chips and flat yarns, applied in the direction of single-component polyester rayon, melt spinning, stretch spinning, etc., can solve the problem that the woven bag is difficult to meet the tensile properties, and prevent embrittlement Fracture, reduced crystallization, simple process effect

Inactive Publication Date: 2018-06-15
常州至能土工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art also discloses many methods of producing flat yarns utilizing recycled PET, but as the invention patent of application number 201410059274.8 discloses a method of utilizing PET to produce flat yarns, it mainly adopts PET polyester chips, and toughening agent, anti- The oxygen agent and the filler are mixed and extruded by the extruder to obtain a thick sheet. After preliminary stretching, the cutting device is used to cut into initial flat filaments, and the initial flat filaments are stretched and drawn accordingly to obtain finished flat filaments. The width of the flat yarn produced by the method is 1-2mm, the thickness is 10-40um, and the maximum tensile strength of the single yarn does not exceed 500MPa. The woven bag produced by using this flat yarn is difficult to meet the needs of packaging bags in the fields of mineral powder and building materials. Requirements for higher tensile properties

Method used

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  • Method for producing flat filaments from polyester chips

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0022] Step 1: put a certain weight of polyester chip raw material, 0.5% polyester chip weight anti-aging agent and 1‰ polyester chip color masterbatch into the mixer 1, mix well and then enter the pre-crystallizer 2 Crystallization treatment, and then enter the dehumidification dryer 3 for dehumidification and drying processing to become a uniform state, and then enter the screw extruder 5 through the adsorber 4;

[0023] The second step: in the screw extruder, under the temperature condition of 250-330 ℃, the dried slices are melt-blended and then extruded;

[0024] The third step: the molten material extruded by the screw extruder enters the spinneret die device 6 and is directly obtained after being sprayed out through the nozzle hole of the spinneret. The width is 3mm-12mm, the thickness is 0.05mm-1mm, and the draw ratio is 1.5-10 initial flat wire;

[0025] Step 4: Enter the initial flat yarn obtained in the third step into the water circulation cooling device 7 for coo...

specific Embodiment 2

[0030] Step 1: Put a certain weight of polyester slice raw material, 3% polyester slice weight anti-aging agent and 3‰ polyester slice weight masterbatch into the mixer, mix and stir evenly, enter the pre-crystallizer for crystallization treatment , and then enter the dehumidification dryer for dehumidification and drying processing to become a uniform state, and then enter the screw extruder through the adsorber; then repeat the second step to the eighth step of the specific embodiment one, and finally obtain a width of 1.5-3mm and a thickness of 0.05 -0.25mm, the draw ratio is 1.5-8, the monofilament tensile strength is 150-350N, and the elongation is less than 30% finished flat yarn;

specific Embodiment 3

[0031] Step 1: Put a certain weight of polyester chip raw material, 1.5% polyester chip weight anti-aging agent and 2‰ polyester chip color masterbatch into the mixer, mix and stir evenly, enter the pre-crystallizer for crystallization treatment , and then enter the dehumidification dryer for dehumidification and drying processing to become a uniform state, and then enter the screw extruder through the adsorber; then repeat the second step to the eighth step of the specific embodiment one, and finally obtain a width of 1.5-3mm and a thickness of 0.05 -0.25mm, draw ratio of 1.5-8, monofilament tensile strength of 150-350N, elongation less than 30% finished flat yarn.

[0032] In the present invention, polyester chips are added with appropriate anti-aging agent and color masterbatch, mixed and stirred, crystallized, dried, extruded by an extruder, and then entered into a spinning die device for spinning to obtain the initial flat filament directly, without cutting by a cutting de...

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Abstract

The invention relates to the field of high-polymer material processing, in particular to a method for producing flat filaments from polyester chips. The method comprises the following steps that 1, the polyester chips, an anti-aging agent and color master batch are mixed, stirred, crystallized, dried and processed to be uniform, and then the mixture enters a screw extruder; 2, the chips are melted, blended and then extruded in the screw extruder; 3, the chips enter a spinneret die head device and are sprayed by a spinneret plate to obtain initial flat filaments; 4, after being cooled, the initial flat filaments enter an initial traction system to be stretched; 5, the initial flat filaments enter an oven and are heated and kept warm; 6, the initial flat filaments are subjected to traction and stretching again; 7, step 4, step 5 and step 6 are repeated 2-4 times, and flat filament finished products are obtained; 8, the flat filament finished products are wound and packed. The flat filaments produced through the method are high in anti-aging performance and high in tensile strength.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a method for producing flat yarns by using polyester chips. Background technique [0002] At present, the plastic woven bags produced, sold and used at home and abroad all use polypropylene resin (PP) as raw material to make flat yarn, and then weave them into woven bags for packaging items. Because polypropylene woven bags are easy to separate from the packaging and are light in weight , low cost, has been widely used in the packaging of large comprehensive products such as chemical industry, mineral powder, building materials and grain. However, due to poor weather resistance and easy oxidation of PP, the mechanical strength of the woven bag during storage, especially the impact strength is greatly reduced, which affects the packaging effect. The performance of polyester (PET) woven bags is superior to that of polypropylene woven bags, mainly in: the tensile strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/253D01D5/088D01D10/02D01D5/12D01F6/92D01F1/10
CPCD01D5/08D01D5/0885D01D5/12D01D5/253D01D10/02D01F1/10D01F6/92
Inventor 郭亚军
Owner 常州至能土工材料有限公司
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