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Method for testing boiling shrinkage of high shrinkage polyester fiber

A boiling water shrinkage, filament boiling water technology, applied in textile testing, material inspection products, etc., can solve the problems of high shrinkage fiber evaluation deviation, negative impact of subsequent processed products, etc., to achieve fast evaluation speed, high accuracy, good boiling water The effect of shrinkage

Inactive Publication Date: 2005-07-20
SINOPEC YIZHENG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing two test methods are difficult to accurately characterize the shrinkage properties of high-shrinkage filaments, which will easily lead to deviations in the evaluation of high-shrinkage fibers in fabric design and fabric style, and have a relatively large negative impact on the use of subsequent processed products.

Method used

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  • Method for testing boiling shrinkage of high shrinkage polyester fiber
  • Method for testing boiling shrinkage of high shrinkage polyester fiber
  • Method for testing boiling shrinkage of high shrinkage polyester fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The high-shrinkage polyester FDY filament and the yarn containing the filament are respectively processed on the bobbin frame to make a skein, and carried out for 2 hours under the conditions of standard atmospheric pressure, 18-22 °C, and relative humidity of 62-68%. Equilibrium before heat treatment above. Measure the respective length L before boiling 0 , then put into a mesh bag. When the water temperature is 40°C, immerse the mesh bag containing the sample into the water, raise the water temperature to 100°C at a rate of 1.7°C / min, keep boiling for 30 minutes, then take out the mesh bag and boil it Blot the sample with absorbent paper, dry the sample at 50-60°C and no external tension for 60-90 minutes, and then in a relaxed state at standard atmospheric pressure, 18-22°C, relative humidity Under the condition of 62-68%, the sample is subjected to equilibrium treatment for more than 2 hours, and the length L of the sample after boiling is measured S , according ...

Embodiment 2

[0021] Use the same batch of samples as in the example, except that the temperature of the water medium when it is put into the mesh bag containing the sample is 30°C, the heating rate of the water is 4.3°C / min, and the time to maintain the boiling state is 35 minutes. Except for a change of conditions, other testing process and conditions are the same as in Example 1, and the boiling water shrinkage rate of the high-shrinkage polyester FDY filament sample is 22.3%, and the boiling water shrinkage rate of the yarn sample containing the high-shrinkage polyester FDY filament The rate is 20.5%.

Embodiment 3

[0023] With the sample of the same batch as in the embodiment, except that the aqueous alkali solution is used as the heating medium, the temperature of the water is 50°C when the mesh bag containing the sample is added, the heating rate of the water is 1.2°C / min, and the boiling state is maintained. Time is 25 minutes except that four conditions are changed, other test process and conditions are identical with embodiment one, obtain the boiling water shrinkage rate of this high-shrinkage polyester FDY filament sample 22.6%, the yarn containing this high-shrinkage polyester FDY filament The boiling water shrinkage of the sample was 20.8%.

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Abstract

In the method, the specimen is placed in neutral or basic water media befor glass transition temperature Tg and the specimen is sufficiently shrunk under the condition that the water is temperature-rised up to boiling with rate of 0.5-7 degree c / min. and to keep it in the boiling water for 25-35 minute. The shrunk specimen length is measured after heating treatment and balancing process, and then the boiling water shrinkage rate for the fibre can be calculated out after making comparison with data before shrinkage. The result obtained from the method can be used directly for design of plus material.

Description

[0001] Involved areas [0002] The invention relates to a method for testing the shrinkage in boiling water of polyester filaments, in particular to a method for testing the shrinkage in boiling water of high-shrinkage pure polyester filaments or modified polyester filaments with shrinkage greater than 15%. Background technique [0003] Boiling water shrinkage (shrinkage) is an important performance index of polyester filaments, which is defined by the International Chemical Fiber Standards Bureau as: the reduction in the length of the sample that occurs after boiling water treatment for a specified period of time, accounting for the untreated sample Expressed as a percentage of the length. In the BISFA standard promulgated by the International Chemical Fiber Standards Bureau, the shrinkage in boiling water is calculated by measuring the length of the sample before and after treatment under the specified pretension. At present, some large-scale polyester enterprises in the wo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/36
Inventor 季平严建华王芳
Owner SINOPEC YIZHENG CHEM FIBER
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