Method for testing static creep endurance quality of PET industrial yarns

A technology of polyester industrial yarn and testing method, which is applied in the field of testing and can solve the problems of unspecified use of polyester fiber wear and tear, aging and fatigue life

Inactive Publication Date: 2015-09-09
ZHEJIANG UNIFULL IND FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, domestic testing methods for polyester industrial yarns are limited to routine testing of linear density, tensile properties, heat s...

Method used

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  • Method for testing static creep endurance quality of PET industrial yarns
  • Method for testing static creep endurance quality of PET industrial yarns
  • Method for testing static creep endurance quality of PET industrial yarns

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Experimental program
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Embodiment Construction

[0022] Set a force value, the tensile machine stretches the sample at the initial speed to the force value, that is, stops stretching. As the elongation of the sample changes, the tensile machine maintains the tensile force value on the sample until the sample breaks. And it can automatically record the time to maintain the force value.

[0023] The test conditions of the present invention: temperature: (20±5) ℃, humidity: (65±5)%, test gauge length: (500±1.0) mm, initial speed: 100mm / min, pre-tension: (0.05±0.005) cN / dtex.

[0024] (1) From the two batches of products, take 24 full-volume samples, and remove the transition wire (generally 400 meters) produced at the moment of switching the surface layer of each silk drum; test the breaking strength of 24 samples, and calculate the average breaking strength of the samples ;

[0025] (2) Input the 4 force values ​​of 80%, 83%, 87%, and 90% of the average breaking force into the tensile machine software system respectively, a...

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Abstract

The invention discloses a method for testing the static creep endurance quality of PET industrial yarns. The test method is characterized by comprising the following steps: (1) extracting samples from products, testing the breaking strength of the samples, and calculating the average breaking strength of the samples; (2) testing four force values, namely 80% of the average breaking strength value, 83% of the average breaking strength value, 87% of the average breaking strength value and 90% of the average breaking strength value; (3) after testing, automatically calculating the creep rupture time of the samples under each fixed force value by a tensile machine; (4) recording creep rupture time of the samples under each force value, wherein five samples are tested under each fixed force value; (5) calculating Lg (T) value of each creep rupture time; (6) mapping by taking the loading value of each dtex as the horizontal ordinate and the Lg (T) value as the vertical coordinate; (7) calculating the standard deviation s of the Lg (T) value of each creep rupture time of each sample under each force value, and then calculating the Km value; and (8) in the production process, selecting the samples, testing, calculating, and comparing with the characteristic curve, if all the measurement results are on the characteristic curve the test is qualified, and the qualified results are the characteristic coefficient values of the static creep rupture.

Description

technical field [0001] The invention relates to a method for testing the static creep durability of polyester industrial yarn, belonging to the technical field of testing. Background technique [0002] With the rapid development of deep-water oil and gas resources development, the equipment technology of offshore platforms is also developing rapidly. The research on mooring cable materials has become an urgent need for the research and design of offshore platform mooring systems. [0003] In the mooring system, as the water depth increases, the self-weight of the anchor chain will also increase rapidly, which not only increases the tension in the anchor chain, but also increases the vertical load on the platform, thereby reducing the payload capacity of the platform; In addition, as the water depth increases, the positioning ability of the anchor chain mooring system will also quickly decrease. Therefore, mooring systems on deep-water offshore platforms are more likely to ...

Claims

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Application Information

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IPC IPC(8): G01N3/28
Inventor 茅惠新胡运丽宋明根
Owner ZHEJIANG UNIFULL IND FIBER
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