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Method of producing flat fibers for plastic woven bags and flexible freight containers by using waste PET (polyethylene terephthalate) bottles

A polyester bottle and plastic woven bag technology, which is applied in the fields of flat yarn, flat yarn for container bags, and plastic woven bags produced from waste polyester bottles, which can solve the problems of flat yarn becoming hard, easy to deform, and low elongation at break. Problems, to avoid easy broken wire, long service life, good anti-aging effects

Inactive Publication Date: 2016-05-04
QINGDAO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for producing flat yarns for plastic woven bags and container bags from waste polyester bottles, and overcome the stretching of flat yarns for PET woven bags and container bags in the prior art. Insufficient strength, low elongation at break, easy deformation after stretching, and hard flat wire, using the above production methods can achieve the following goals:

Method used

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  • Method of producing flat fibers for plastic woven bags and flexible freight containers by using waste PET (polyethylene terephthalate) bottles
  • Method of producing flat fibers for plastic woven bags and flexible freight containers by using waste PET (polyethylene terephthalate) bottles
  • Method of producing flat fibers for plastic woven bags and flexible freight containers by using waste PET (polyethylene terephthalate) bottles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, a kind of waste and old polyester bottle produces the method for high-intensity, high-toughness plastic woven bag, container bag flat wire, comprises the following steps:

[0039] (1) Crushing and cleaning steps: cutting and crushing waste polyester plastic bottles and bottle caps into bottle flakes with a diameter of 12mm-14mm, among which the intrinsic viscosity of the polyester bottle flakes is 0.60-0.68dL / g, through a fully automatic ultrasonic cleaning machine, After ultrasonic cleaning in sequence, the ultrasonic frequency is 20kHz, the ultrasonic treatment time is 3 minutes, high-pressure spray cleaning, hot water rinsing at 85°C, air bubbling tap water cleaning, and clean bottle flakes are obtained;

[0040] (2) Crystallization drying: Send the crushed flakes into the vacuum drum device for heating and drying through the feeder, heat to 140°C with heat conduction oil, and dry the crystallization for 6 hours, and use a vacuum pump to continuously eva...

Embodiment 2

[0046] Embodiment 2, a kind of waste and old polyester bottle produces the method for high-intensity, high-toughness plastic woven bag, container bag flat wire, comprises the following steps:

[0047] (1) Crushing and cleaning steps: cutting and crushing waste polyester plastic bottles and bottle caps into bottle flakes with a diameter of 12mm-14mm, among which the intrinsic viscosity of the polyester bottle flakes is 0.60-0.68dL / g, through a fully automatic ultrasonic cleaning machine, After ultrasonic cleaning in sequence, the ultrasonic frequency is 40kHz, the ultrasonic treatment time is 2 minutes, high-pressure spray cleaning, hot water rinsing at 95°C, air bubbling tap water cleaning, and clean bottle flakes are obtained;

[0048] (2) Crystallization drying: Send the crushed flakes into the vacuum drum device for heating and drying through the feeder, heat to 160°C with heat transfer oil, and dry the crystallization for 4 hours, and use a vacuum pump to continuously vacuum ...

Embodiment 3

[0053] Embodiment 3, a kind of waste and old polyester bottle produces the method for high-intensity, high-toughness plastic woven bag, container bag flat wire, comprises the following steps:

[0054] (1) Crushing and cleaning steps: cutting and crushing waste polyester plastic bottles and bottle caps into bottle flakes with a diameter of 12mm-14mm, among which the intrinsic viscosity of the polyester bottle flakes is 0.60-0.68dL / g, through a fully automatic ultrasonic cleaning machine, After ultrasonic cleaning in sequence, the ultrasonic frequency is 50kHz, the ultrasonic treatment time is 1 minute, high-pressure spray cleaning, hot water rinsing at 90°C, air bubbling tap water cleaning, and clean bottle flakes are obtained;

[0055] (2) Crystallization drying: Send the crushed flakes into the vacuum drum device for heating and drying through the feeder, heat to 180°C with heat transfer oil, and dry the crystallization for 3 hours. The negative pressure generated in the dryi...

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Abstract

The invention relates to a method of producing flat fibers for plastic woven bags and flexible freight containers by using waste PET (polyethylene terephthalate) bottles. The method is characterized by comprising the following steps of: mixing the waste PET bottles which are dried or crystalized in advance with a compatibilizer, an antioxidant, a tackifier, a filling agent, a color masterbatch, a lanthanide series metallic compound and additives, then adding the mixture to an extruder, carrying out extrusion, filtering and measurement in sequence, carrying out tape casting by using a die head, and cooling on a cooling roller to obtain films. The relative pulling strength (N / tex) of the flat fibers is greater than or equal to 0.58; the elongation rate (%) of the flat fibers is 16.5-21.4; the oxygen index of the flat fibers is above 26; the linear density (tex) of the flat fibers reaches 71.6-153.7; the tensile strength retention rate of the flat fibers is 93.3%-93.8% when the flat fibers are placed for 144 hours; the strength retention rate of the flat fibers is 97.1%-97.5% when the flat fibers are placed for 144 hours at the temperature of minus 35 DEG C; when being placed for 2 hours at the temperature of 140 DEG C, the shrinkage rate of the 10 cm flat fiber is 0; and the ink layer combination firmness of the flat fibers is 92%-99%.

Description

technical field [0001] The invention relates to a flat yarn, in particular to a method for producing flat yarn for plastic woven bags and container bags from waste polyester bottles, and belongs to the technical field of polymer material processing. Background technique [0002] At present, plastic woven bags and container bags are mainly made of polypropylene (PP) or polyethylene (PE), which are extruded and stretched into flat wires, and then woven and bagged. They are widely used in food, grain For the transportation packaging of grain, medicine, chemical industry, mineral products and other powdery, granular and massive items, container bags are widely used in developed countries as packaging products for transportation and storage. [0003] At present, PP or PE plastic woven bags or flat wires for container bags have poor tensile strength and poor anti-aging performance. The drawing unit of this plastic flat wire cannot use other resin plastic raw materials to produce f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29B17/00D01D5/12D01D10/02
CPCY02W30/62B29B17/00B29B2017/0015B29C48/08D01D5/12D01D10/02
Inventor 张居正刘忠民
Owner QINGDAO UNIV
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