A test method for pigment content in dope dyed polyester

A technology of stock solution coloring and testing method, which is applied in the field of quantitative analysis of stock solution colored polyester, and can solve the problems of inability to directly and accurately measure the content of pigments, high residual rate of thermal weight loss, etc.

Active Publication Date: 2020-09-25
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high benzene ring content of the polyester molecular chain, the thermogravimetric analysis in an inert gas has a high mass residual rate of thermogravimetric analysis, and its thermogravimetric mass residual rate is affected by the size of the test sample, the flow rate of the inert gas and oxygen. The influence of factors such as content
Therefore, thermogravimetric analysis cannot directly and accurately measure the pigment content in the dope dyed polyester

Method used

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  • A test method for pigment content in dope dyed polyester
  • A test method for pigment content in dope dyed polyester
  • A test method for pigment content in dope dyed polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Dry the stock solution-colored polyethylene terephthalate black fiber sample at a temperature of 130° C. to a constant weight to obtain a stock solution-colored polyethylene terephthalate black fiber sample after drying;

[0061] (2) taking by weighing the stock solution dyed polyethylene terephthalate black fiber sample after the drying treatment of 5.0004g and adding methanol with a weight of 20.0006g into a reaction tube with a weight of 528.2615g;

[0062] (3) After the reaction tube is sealed with a sealing device, it is put into a heating device and heated to 330° C. to make the stock solution colored polyethylene terephthalate black fiber undergo alcoholysis and depolymerization reaction in methanol reaching a supercritical state, and the reaction time is 30min;

[0063] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0064] (5) The reaction tube is place...

Embodiment 2

[0071] (1) Dried the stock solution colored polybutylene terephthalate red film sample at a temperature of 50° C. to a constant weight to obtain a stock solution colored polybutylene terephthalate red film sample after the drying treatment;

[0072] (2) taking by weighing the stock solution dyed polybutylene terephthalate red film sample after the drying treatment of 1.0005g and adding methanol with a weight of 20.0003g into a reaction tube with a weight of 528.2615g;

[0073] (3) After the reaction tube is sealed with a sealing device, put it into a heating device and heat it to 240° C. to make the stock solution colored polybutylene terephthalate red film undergo alcoholysis and depolymerization reaction in methanol reaching a supercritical state. The reaction time is 120min;

[0074] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0075] (5) The reaction tube is placed ...

Embodiment 3

[0082] (1) drying the stock solution colored polytrimethylene terephthalate blue fiber sample at a temperature of 80° C. to a constant weight to obtain the stock solution colored polytrimethylene terephthalate blue fiber sample after the drying treatment;

[0083] (2) Weighing the dry-treated stock solution dyed polytrimethylene terephthalate blue fiber sample with a weight of 6.0002 g and adding methanol with a weight of 18.0002 g into a reaction tube with a weight of 528.2615 g;

[0084](3) After the reaction tube is sealed with a sealing device, put it into a heating device and heat it to 350° C. to make the dope-colored polytrimethylene terephthalate blue fiber undergo alcoholysis and depolymerization reaction in methanol reaching a supercritical state, and the reaction time is 120 minutes;

[0085] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0086] (5) The reaction...

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Abstract

The invention belongs to the field of quantitative analysis of stock solution pigmented polyester, and particularly relates to a test method for pigment content of stock solution pigmented polyester.The test method comprises the following specific steps: depolymerizing the stock solution pigmented polyester into dimethyl terephthalate, diol and pigments by a supercritical methanol depolymerization method; then, testing the thermal weight loss mass residue rate of a supercritical methanol depolymerized stock solution pigmented polyester product in a heating temperature segment of 284 to 400 DEG C by a thermal gravimetric analyzer; and finally, calculating the pigment content of the stock solution pigmented polyester according to the thermal weight loss mass residue rate. Through adoption of the test method, the pigment content of the stock solution pigmented polyester can be accurately measured, and the problem that the existing methods cannot accurately measure the pigment content ofthe stock solution pigmented polyester is solved. Moreover, the test method provided by the invention has the advantages of easiness in operation, no need for complicated instruments and equipment, accurate and reliable results and high reproducibility.

Description

technical field [0001] The invention belongs to the field of quantitative analysis of stock solution colored polyester, in particular to a method for testing pigment content in stock solution colored polyester. Background technique [0002] Dope dyed polyester fiber refers to the colored polyester fiber obtained by adding a colorant to the spinning melt through the spinning process, also known as non-dyed polyester fiber or pre-spun dyed polyester fiber. Dope dyed polyester fiber is directly processed into textiles, which can save the printing and dyeing process, avoid a large amount of printing and dyeing wastewater, and reduce COD emissions. It is an effective method to control pollution at the source, and has outstanding environmental friendly features. At present, there is no uniform test method and standard for the pigment content in liquid-dyed polyester products in my country or even in the world. [0003] Thermogravimetric analysis refers to a thermal analysis techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 邱志成李鑫金剑钟淑芳国凤敏
Owner CHINESE TEXTILE ACAD
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