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A method for extracting polyphenylene sulfide from non-woven fabric

A technology of polyphenylene sulfide and non-woven fabrics, which is applied in the field of extraction, can solve problems such as the tight supply and demand of polyphenylene sulfide, and achieve the effect of alleviating the tight supply and demand and reducing pollution

Active Publication Date: 2016-09-14
广东壹豪新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for extracting polyphenylene sulfide from non-woven fabrics used as high-temperature filter bags in view of the deficiencies of the prior art, which can reduce the environmental pollution caused by waste non-woven fabrics on the one hand And the economic losses caused, on the other hand, the extracted polyphenylene sulfide can be reused to alleviate the problem of tight supply and demand of polyphenylene sulfide

Method used

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  • A method for extracting polyphenylene sulfide from non-woven fabric

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Embodiment 1

[0026] Such as figure 1 As shown, a method for extracting polyphenylene sulfide from a non-woven fabric provided in this embodiment, the non-woven fabric includes polyphenylene sulfide, polytetrafluoroethylene and polyimide fibers, the method may further comprise the steps:

[0027] The first step, pre-treatment: collect and arrange the non-woven fabric, and remove the impurity particles on its surface; then put the finished non-woven fabric in an oven with a temperature of 85°C, and dry the non-woven fabric to reduce its moisture content. It is less than 1wt.%; and then the non-woven fabric is divided by a shearing device to form a square piece of cloth with a side length of 2cm to 3cm.

[0028] The second step is differential melting; the divided non-woven fabric is fed through a forced feeder and transported to an air-filled melting device. The melting device includes three temperature zones, and the temperature of the upstream temperature zone is 200°C, the temperature in...

Embodiment 2

[0032] Such as figure 1 As shown, a method for extracting polyphenylene sulfide from a non-woven fabric provided in this embodiment, the non-woven fabric includes polyphenylene sulfide, polytetrafluoroethylene and polyimide fibers, the method may further comprise the steps:

[0033]The first step, pre-treatment: collect and arrange the non-woven fabric, and remove the impurity particles on its surface; then put the finished non-woven fabric in an oven with a temperature of 80°C, and dry the non-woven fabric to reduce its moisture content. It is less than 1wt.%; the non-woven fabric is divided by a shearing device to form a rectangular piece of cloth with a length of 3cm-4cm and a width of 2cm-3cm.

[0034] The second step is differential melting; the divided non-woven fabric is fed through a forced feeder and transported to an air-filled melting device. The melting device includes three temperature zones, and the temperature of the upstream temperature zone is The temperature...

Embodiment 3

[0038] Such as figure 1 As shown, a method for extracting polyphenylene sulfide from a non-woven fabric provided in this embodiment, the non-woven fabric includes polyphenylene sulfide, polytetrafluoroethylene and polyimide fibers, the method may further comprise the steps:

[0039] The first step, pre-treatment: collect and arrange the non-woven fabric, and remove the impurity particles on its surface; then put the finished non-woven fabric in an oven with a temperature of 90°C, and dry the non-woven fabric to reduce its moisture content. It is less than 1wt.%; and then the non-woven fabric is divided by a shearing device to form a circular cloth piece with a diameter of 2-3cm.

[0040] The second step is differential melting; the divided non-woven fabric is fed through a forced feeder and transported to an air-filled melting device. The melting device includes two temperature zones, and the temperature of the upstream temperature zone is The temperature in the downstream te...

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Abstract

The invention belongs to the technical field of extraction methods, and particularly relates to a method for extracting polyphenylene sulfide from non-woven fabric. The non-woven fabric comprises the polyphenylene sulfide, polytetrafluoroethylene and polyimide fibers. The method comprises the following steps: pretreatment, differentiation melting, crushing treatment and separation. Compared with the prior art, the method provided by the invention has the advantages that firstly impurity removal, drying, shearing and other pretreatment are performed on the non-woven fabric used as a high-temperature filter bag, and then the differentiation melting method is adopted, so that polyimide fibers with relatively low melting points are decomposed, but the polyphenylene sulfide and polytetrafluoroethylene with relatively high melting points are not decomposed, and keep primary characteristics; the non-woven fabric subjected to melting treatment is crushed and finally, carbon granules with relatively light weight are removed through a whirlwind device, so that the mixture of polyphenylene sulfide particles and fibrous polytetrafluoroethylene is left; since the fibrous polytetrafluoroethylene has static electricity, the static electricity can be separated out through a spiral vibration electrostatic screen, and the polyphenylene sulfide is left.

Description

technical field [0001] The invention belongs to the technical field of extraction methods, in particular to a method for extracting polyphenylene sulfide from a non-woven fabric used as a high-temperature filter bag. Background technique [0002] Non-woven fabric, also known as non-woven fabric, is composed of directional or random fibers. It is a new generation of environmentally friendly materials. and many other advantages. [0003] The fibers used in the production of non-woven fabrics mainly include polypropylene (PP), polyester (PET), and nylon (PA), viscose, acrylic, polyethylene (HDPE), and polyvinyl chloride (PVC). Nonwovens are used in a wide range of applications, such as shoemaking, tanning, mattresses, decoration, automotive, printing and fixtures, etc. One of the specific uses of non-woven fabrics is as a high-temperature filter bag. At present, the main components of high-temperature filter bags include polyphenylene sulfide, fibrous polytetrafluoroethylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/06C08L81/02
CPCY02W30/62
Inventor 陈钢
Owner 广东壹豪新材料科技股份有限公司
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