Polyester material recovery and surface mechanical etching method

A polyester material and mechanical technology, which is applied in the field of polyester material recycling and surface mechanical etching, can solve the problems of poor physical properties of fibers and high recycling energy consumption, and achieve the effect of reducing energy consumption

Active Publication Date: 2018-06-01
福建赛隆科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] For this reason, it is necessary to provide a method for recycling waste polyester materials, which is used to solve the problems of high energy consumption in the recycling of waste polyester materials and poor physical properties of the fibers produced in the prior art

Method used

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  • Polyester material recovery and surface mechanical etching method
  • Polyester material recovery and surface mechanical etching method
  • Polyester material recovery and surface mechanical etching method

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Embodiment 1

[0043] A method for polyester material recovery and surface mechanical etching, comprising the following steps:

[0044] Alcoholysis: Put 100g of waste polyester, 180g of EG, and 2.7g of potassium carbonate into the alcoholysis kettle, replace the air with nitrogen, heat up to 200°C, and alcoholyze for 3.0hr.

[0045] Removal of impurities: the above-mentioned alcoholyzate is cooled to 170°C, and filtered through a 100-mesh filter to remove solid impurities. The solid impurities are washed with 90g of hot EG at 170°C, and the washed EG is returned to the alcoholysis tank for alcoholysis of the next batch of waste polyester.

[0046] Exchange reaction: add 180 g of methanol and 2.7 g of potassium carbonate to the above alcoholyzate, keep the temperature at 75° C., and the reaction time is 1.0 hr.

[0047] Crude extraction: the temperature of the above-mentioned transesterification product is lowered to 40°C, and DMT crystallizes out. A crude DMT filter cake was obtained by va...

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Abstract

The invention relates to the technical field of polymer processing and provides a polyester material recovery and surface mechanical etching method. The method comprises steps as follows: alcoholysis:a recovered polyester material and EG (ethylene glycol) are added to an alcoholysis kettle in a weight ratio of the polyester material to EG being 1:(1.0-2.0) for alcoholysis; impurity removal: an alcoholysis product is filtered by a filter; exchange reaction: methanol is added to the filtered alcoholysis product for an ester exchange reaction, and an ester exchange product is obtained; extraction of DMT; spinning: purified DMT is prepared into graphene / polyester fiber with a composite spinning technology; mechanical etching: fine holes are etched in the surface of the prepared graphene / polyester fiber. Energy consumption for polyester recovery can be reduced, more functional ingredients can be exposed on the surface of the graphene / polyester fiber, and the functional ingredients in the graphene / polyester fiber can better perform the performance.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to a polyester material recycling and surface mechanical etching method. Background technique [0002] Polyester (polyethylene terephthalate, PET) is the synthetic fiber material with the largest output, which is widely used in fibers, textile fabrics, clothing, polyester bottles, films, sheets and other products. Based on the enhancement of environmental awareness, resource conservation and sustainability needs, how to deal with the scraps produced in the manufacture of polyester products and the waste after use of polyester products has become an urgent problem to be solved, and the recycling of waste and old polymers has become the development direction of green textiles. . [0003] At present, the recycling methods of waste polyester mainly include physical recycling and chemical recycling. Physical recycling methods are relatively simple and economical, but the per...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D02J3/02
CPCC08G63/183D01F1/10D01F6/92D02J3/02Y02P70/62
Inventor 方华玉王国德杨元坤托马斯·沃尔特施密特朱恩斌李天源杨元荣鲍领翔徐明辉
Owner 福建赛隆科技有限公司
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