A method and system for testing the shedding rate of knitted imitation wool fabrics based on an electronic strength meter

Abstract

This invention provides a method and system for testing the shedding rate of knitted wool-like fabrics based on an electronic tensile strength meter, aiming to solve the problems of existing shedding test methods, such as high subjectivity, poor repeatability, and inability to realistically simulate the shedding process during fabric use. This method simulates the process of fibers being pulled out of the base fabric through a standardized tensile test, and quantitatively measures the shedding rate and related mechanical properties by combining mechanical data and weight changes. Specific steps include sample pretreatment, setting up the electronic tensile strength meter, recording force values ​​during the test, and collecting and weighing the detached fibers. When calculating the shedding rate, the relationship between the total weight of the detached fibers and the number of tests, combined with the weight of a single fiber measured in the pre-experiment and the target number of fibers, yields accurate shedding rate data. Compared with traditional visual rating or simple friction tests, this invention has higher objectivity and accuracy, can realistically reproduce the shedding situation during fabric use, and the test results are reliable and highly repeatable.

Description

Technical Field

[0001] This invention relates to the field of textile testing technology, and more specifically to a method and system for testing the shedding rate of knitted wool-like fabrics based on an electronic strength meter. Background Technology

[0002] With the widespread application of knitted wool-like fabrics in clothing, home textiles, and other fields, their shedding performance has become one of the important indicators for evaluating fabric quality. Traditional shedding performance testing methods mainly rely on subjective evaluation, such as visual rating after rubbing or simple physical methods (e.g., weighing after rubbing). These methods have significant drawbacks. First, subjective evaluation depends on the experience of the inspectors and is easily influenced by personal judgment, leading to differences in test results between different personnel or laboratories, lacking comparability. Second, traditional testing methods fail to effectively simulate the use of fabrics during actual wear, especially the shedding process of lint, making it difficult to accurately reflect the true shedding performance of the fabric. In addition, existing testing methods are mostly qualitative assessments or only perform simple quantitative analyses, unable to accurately quantify the severity of shedding, thus failing to provide effective data support for fabric production and process improvement.

[0003] Currently, although some physical methods have been proposed, such as friction or tensile tests to evaluate shedding performance, these methods typically fail to consider the various external forces acting on the fibers during fabric use, particularly the effect of tensile force on fiber shedding. Therefore, they cannot realistically simulate the mechanical process of fiber shedding, leading to insufficient scientific rigor and reliability of the test results. In summary, existing technologies have significant limitations in testing the shedding performance of knitted imitation wool fabrics, and a more objective, accurate, and realistically simulated shedding mechanism is urgently needed. Summary of the Invention

[0004] This invention provides a method and system for testing the shedding rate of knitted imitation wool fabrics based on an electronic strength tester. By using an electronic strength tester for tensile testing, the mechanical process of wool shedding is simulated, which not only solves the shortcomings of existing methods, but also greatly improves the accuracy, repeatability and comparability of test results between laboratories.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for testing the shedding rate of knitted imitation wool fabric based on an electronic strength tester includes the following steps:

[0007] S1. Sample preparation: Cut a sample from the fabric to be tested, and pre-treat it to separate the target test fibers from the adjacent fibers to ensure that the test is concentrated on a single fiber.

[0008] S2. Instrument settings: Using an electronic strength tester, set the interval length and tensile speed;

[0009] S3. Clamping step: Fix one end of the sample to the upper clamp and clamp the pretreated fluffy end to the lower clamp to ensure that the sample is clamped firmly and centered.

[0010] S4. Test procedure: Start the electronic strength tester to perform a tensile test, record the maximum force value when the target test fibers break or come off, and collect all fibers that fall off during the test.

[0011] S5. Calculate the shedding rate of the knitted imitation wool fabric based on the collected weight of pulled-out fibers using the following formula:

[0012] Hair shedding rate (%) = (△G / △N) / (G0N0) × 100%

[0013] in,

[0014] △G is the total weight (g) of the removed fluff;

[0015] △N represents the number of effective pull-out tests;

[0016] G0 is the average weight (g) of a single hair.

[0017] N0 represents the number of target villi present on the sample.

[0018] In a specific embodiment, for warp-knitted fabrics, the pile yarn fixed by a single warp yarn is sorted out along the warp direction as the target test pile, and the pile on the adjacent warp yarns is cut off.

[0019] For weft-knitted fabrics, corresponding treatment is carried out along the weft direction to effectively separate the target pile from the adjacent pile.

[0020] In a specific embodiment, the spacing length is set to 200mm ± 1mm, and the stretching speed is set to 100mm / min.

[0021] In one specific embodiment, the sample has a width of 50 mm and a length of 250 mm.

[0022] In a specific embodiment, the following determination step is included after the testing step:

[0023] If there is no lint residue on the lower clamp, the test is deemed invalid and the test data is discarded. The test is then repeated using a spare sample.

[0024] A system for testing the shedding rate of knitted imitation wool fabrics based on an electronic strength meter includes:

[0025] An electronic tensile tester is configured to stretch a specimen at a constant speed and record the applied tensile force.

[0026] A sample pretreatment device is used to prepare target test fibers to ensure effective separation of target fibers from adjacent fibers.

[0027] A collection device for collecting the lint pulled out during the test;

[0028] A data calculation unit is used to receive the force value data from the electronic strength meter, calculate the shedding rate based on the collected down weight, and generate a shedding rate report.

[0029] In a specific embodiment, the electronic strength tester is a CRE type electronic strength tester with a spacing length of 200mm±1mm and a tensile speed of 100mm / min.

[0030] The beneficial effect of this technical solution lies in its ability to provide an objective, accurate, and highly repeatable testing method for the shedding performance of knitted imitation wool fabrics. Compared with traditional subjective evaluation methods or simple physical testing methods, this invention, by simulating the mechanical process of wool shedding during actual use, can more realistically reproduce the shedding situation that the fabric may encounter during wear, thereby improving the reliability and scientific validity of the test results. The use of an electronic tensile strength meter for tensile testing allows for precise quantification of mechanical data during the testing process, avoiding interference from human factors and significantly improving the accuracy of the test and the comparability between laboratories. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Testing the shedding rate of warp-knitted fabrics

[0033] S1. Sampling and Humidity Conditioning:

[0034] Take a piece of knitted imitation wool warp-knitted fabric and adjust its humidity according to GB / T6529 standard. Perform humidity balancing under Class II standard atmosphere to ensure stable fabric moisture content, thereby avoiding interference from humidity on the shedding rate test results.

[0035] S2. Sample preparation:

[0036] Cut six samples along the warp direction from the fabric to be tested (five for testing, one as a spare). Each sample is 50 mm wide and approximately 250 mm long. Using precision tweezers, at a distance greater than 20 mm from the selvage, separate the pile yarns fixed by a single warp yarn, ensuring the target pile is fully exposed. Then, use a precision shearing machine to completely remove the pile from all adjacent warp yarns, ensuring that only a single pile is involved in the test and is not affected by other piles.

[0037] S3. Instrument Preparation:

[0038] Calibrate the electronic tensile tester to ensure it meets the requirements of GB / T3923.1 standard. Set the instrument parameters: interval length of 200mm ± 1mm, and tensile speed of 100mm / min. These parameters ensure that the tensile process accurately simulates the mechanical process of fluff shedding.

[0039] S4. Test Execution:

[0040] Clamp the unshorn end of the sample (i.e., the base fabric end) into the upper clamp of the electronic tensile strength tester, and clamp the lower end of the single tuft of fibers into the lower clamp, ensuring a secure and centered clamp. Start the electronic tensile strength tester to begin the tensile test and observe the process until the fibers are completely broken or detached from the base fabric. During the test, record the peak force displayed by the instrument (i.e., breaking strength or pull-out strength). After the test, collect all fibers that have fallen from the lower clamp. If no fibers remain in the lower clamp (i.e., clamping failure or complete fiber slippage), discard the test data and retest using a spare sample.

[0041] S5. Data Processing:

[0042] For 5 sets of valid data, calculate the average pull-out strength. Assume the calculated average pull-out strength is 8.5 N. Collect all pulled-out fibers from the 5 tests and weigh them using a precision electronic balance; the total weight ΔG is 0.015 g. Using microscopic counting and weighing, the average weight G0 of a single fiber in the fabric was pre-measured as 0.0002 g, and the target number of fibers N0 on a 50 mm wide sample was 1200. According to the formula:

[0043] Hair shedding rate (%) = (△G / △N) / (G0N0) × 100%

[0044] in,

[0045] △G is the total weight (g) of the removed fluff;

[0046] △N represents the number of effective pull-out tests;

[0047] G0 is the average weight (g) of a single hair.

[0048] N0 represents the number of target villi present on the sample.

[0049] Substituting the values ​​into the calculation, the shedding rate is found to be 1.25%. The calculation process is as follows:

[0050]

[0051] S6. Results Report:

[0052] The test report should include detailed information on the tests conducted using this standard method, such as sample information, average pull strength (e.g., 8.5 N), shedding rate (e.g., 1.25%), and any deviations from the standard method. The report should also specify the exact conditions and test data for each test to ensure traceability and transparency of the results.

[0053] Example 2: Testing the shedding rate of weft-knitted fabrics

[0054] S1. Sampling and Humidity Conditioning:

[0055] Similar to Example 1, a piece of knitted imitation wool weft-knitted fabric was taken and conditioned according to GB / T6529 standard. The conditioned fabric was conditioned under secondary standard atmosphere to ensure that the moisture content of the fabric reached a stable state before the test.

[0056] S2. Sample preparation:

[0057] For weft-knitted fabrics, cut 6 samples along the weft direction from the fabric to be tested (5 for testing, 1 for backup). Each sample is 50mm wide and approximately 250mm long. Carefully arrange the pile yarns fixed by a single weft yarn on the sample, and cut off the pile on adjacent weft yarns to ensure that the target pile is effectively separated from the adjacent pile to ensure the accuracy of the test.

[0058] S3. Instrument Preparation:

[0059] Same as in Example 1, using an electronic strength tester conforming to GB / T3923.1, with a spacing length of 200mm±1mm and a tensile speed of 100mm / min.

[0060] S4. Test Execution:

[0061] Secure the unshorn end of the sample to the upper clamp, and the pre-treated fluffy end to the lower clamp, ensuring a firm and centered grip. Start the electronic tensile tester to begin the tensile test until the fluff is completely broken or detached from the base fabric. Record the maximum tensile force and collect the fluff that has fallen from the lower jaws.

[0062] S5. Data Processing and Computation:

[0063] Similar to Example 1, all pulled-out fibers were collected and weighed, and the shedding rate was calculated. The validity of each test was ensured, and the shedding rate was calculated according to the formula.

[0064] S6. Results Report:

[0065] Based on the test results, a detailed test report is generated, which includes sample information, test parameters, shedding rate, and pull strength data to ensure the results are traceable.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for testing the pilling of a knitted wool-like fabric based on an electronic strength meter, characterized in that, The method comprises the following steps: S1. Sample preparation, cutting a sample from the fabric to be tested, and separating the target test pile from the adjacent pile through pretreatment to ensure that the test is focused on a single pile; S2. Instrument setting, using an electronic tensile tester, setting the gauge length and the stretching speed; S3. Clamping step, fixing one end of the sample to the upper clamp and clamping the pretreated pile end to the lower clamp to ensure that the sample is clamped firmly and centered; S4. Test step, starting the electronic tensile tester for tensile testing, recording the maximum force value when the target test pile is pulled off or broken, and collecting all the pile that falls off during the test; S5. Calculation, based on the collected weight of the pulled-off pile, using the following formula to calculate the pilling rate of the knitted wool-like fabric: Pilling rate (%) = (△G / △N) / (G0N0) × 100% Wherein, △G is the total weight of the pulled-off pile (g); △N is the number of effective pulling-off tests; G0 is the average weight of a single pile (g); N0 is the number of target piles contained in the sample.

2. The method of claim 1, wherein, The sample pretreatment step comprises: For warp-knitted fabrics, arrange the pile surface yarn fixed by a single warp yarn in the warp direction as the target test pile, and cut off the pile on the adjacent warp yarn; For weft-knitted fabrics, perform corresponding processing in the weft direction to effectively separate the target pile from the adjacent pile.

3. The method according to claim 1 or 2, characterized in that, The gauge length is set to 200mm±1mm, and the stretching speed is set to 100mm / min.

4. The method of claim 1, wherein, The width of the sample is 50mm, and the length is 250mm.

5. The method of claim 1, wherein, The test step further comprises the following determination step: If there is no pile left on the lower clamp, the test is determined to be invalid and the test data is discarded, and a backup sample is used for retesting.

6. A test system for implementing the method of any of claims 1-5, characterized by It comprises: An electronic tensile tester configured to stretch the sample at a constant speed and record the applied tensile force; A sample pretreatment device for preparing the target test pile to ensure that the target pile is effectively separated from the adjacent pile; A collection device for collecting the pulled-off pile during the test; A data calculation unit for receiving the force value data of the electronic tensile tester and calculating the pilling rate according to the collected pile weight to generate a pilling rate report.

7. The test system of claim 6, wherein, The electronic tensile tester is a CRE-type electronic tensile tester with a gauge length of 200mm±1mm and a stretching speed of 100mm / min.

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