Method for testing static creep endurance quality of PET industrial yarns

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 ...

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 shrinkage, appearance, etc., and methods such as abrasion damage, aging, and fatigue life of polyester fibers used in the marine field have not been specified.

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