[0016] The present invention will be further described below with reference to the drawings and specific examples.
[0017] The basic structure of the test device used is as follows figure 1 As shown, it includes an abrasive loader 2 and a sample loader 1 with a disc installed above the abrasive loader 2. An abrasive is fixed on the upper surface of the abrasive loader 2. Two annular grooves 4 are provided on the circular disk of the sample loader 1 in the circumferential direction. The upper end of the test sample is compressed and fixed in the annular groove 4 through the elastic ring 3.
[0018] The abrasive may be a fabric abrasive: it is the same as the fabric at the mouth end or edge portion of the garment cuff. It can also be other soft abrasives.
[0019] The underside of the abrasive can be lined with a foam pad. The foam padding weighs about 270g/m 2 , The thickness is about 8mm, and the diameter of the sample gasket is in line with the size of the abrasive loader.
[0020] In order to speed up the test, a nylon brush can be used as the abrasive. The diameter of the nylon wire is 0.3mm; the rigidity of the nylon wire must be uniform. The diameter of the planting wire is 4.5mm, and each hole is 150 nylon wires. The hole distance is 7mm; the brush surface is required to be flush and the brush is installed. There is an adjusting plate, which can adjust the effective height of the nylon wire, so as to control the wear effect of the nylon brush.
[0021] The trajectory of the friction between the sample and the abrasive is a circle, the relative moving speed is (60±1)r/min, and the diameter of the sample loader is (85±0.5)mm. The instrument has a device for setting the number of exercises and an auto-stop switch when the exercise reaches the set number of times.
[0022] Here is an example of testing.
[0023] (1) Sample preparation
[0024] 1). Five samples are randomly cut from the garment cuff fabric, and there should be no defects on the samples that affect the test results.
[0025] 2) The length of the sample is ≤27mm, and the width meets the requirements of test loading.
[0026] 3). Cut the cut sample into suitable size and fold it symmetrically, and iron the folds flat with an electric iron heated to a suitable temperature.
[0027] 4). Expose the sample to the test standard atmosphere for more than 16h.
[0028] 5). If it is a garment inspection, you can cut off the cuffs directly, remove the excess part, clamp the sample loader, and cut the abrasive from other parts.
[0029] (2) Test steps and procedures
[0030] 1). The instrument should be kept level before the test, and the abrasive should be kept clean. If the instrument is used every day, clean it at least once a week. Clean the brush with a suitable solvent (such as acetone), remove the short lint with a hand brush, and clip the protruding nylon filament with a clip.
[0031] 2) Surround the folded and ironed sample on the sample loader, and then use two elastic rings to press and fix the sample in two annular grooves respectively. The lower plane of the loader is 8mm away from the plane of the abrasive loader, and the sample protrudes 10mm from the lower plane of the loader.
[0032] 3). Set the number of friction revolutions according to Table 1. For other fabric garment cuffs, you can refer to the similar fabric garment cuffs mentioned in the table or separately select test parameters and abrasives for testing.
[0033] Table 1
[0034] Sample type Abrasive friction times Brush friction times Cotton fabric garment cuffs, pocket openings, hem edges, etc. 1200 600 Chemical fiber silk knitted garment cuffs, pocket openings, hem edges, etc. 1500 750 Chemical fiber woven fabric garment cuffs, pocket openings, hem edges, etc. 500 250 Military uniforms (combed blended) cuffs, pocket openings, hem edges, etc. 3000 1500 Combed wool fabric garment cuffs, pocket openings, hem edges, etc. 1000 500 Carded wool fabric garment cuffs, pocket openings, hem edges, etc. 1000 500
[0035] 4). After reaching the set number of revolutions, the instrument will take off the sample after it stops, and finish other samples in sequence. In the judgment environment, according to the wear state on the sample, the length of the sample is 10mm from each side of the sample without judgment, and the nearest 0.5 grade is used to evaluate the wear level of each sample. When the abrasion condition of the sample is abnormal, it shall be comprehensively evaluated and explained according to the degree of its influence on the appearance.
[0036] (3) Assessment of wear
[0037] The rating box should be placed in a dark room.
[0038] In the middle of the sample plate of the grading box, a tested sample and an untested control sample are placed side by side along the fabric. If necessary, use PVC tape to fix it in the correct position. The tested sample is placed on the left, and the untested sample is placed on the right. If the test sample is pre-treated before the pilling test, the control sample should also be a pre-treated sample. If the test sample has not been pre-treated before the test, the control sample should be a sample that has not been pre-treated.
[0039] Result evaluation: a five-level system.
[0040] Level 1-Slightly hairy no pilling, Level 2-Slight pilling, Level 3-Intermediate pilling, Level 4-Disconnection, Level 5-Hole.
[0041] Judging environment: Provide lighting to compare samples. There are 2 18WD65 lamps on the top, and the vertical distance from the light source to the sample is 30cm. Standard atmosphere for test: The general test is in accordance with the three-level standard in GB6529, namely temperature (20±2)℃ and relative humidity (65±5)%. During the arbitration test, follow the secondary standard in GB6529, that is, temperature (20±2)℃ and relative humidity (65±3)%. The sample must be humidified, cut and tested in the standard atmosphere for the test.
[0042] To prevent looking directly at the light, observe each sample directly from the front of the sample at the edge of the grading box.
[0043] Due to the subjective factors of the assessment, it is recommended that multiple people conduct the assessment.
[0044] Grade each sample according to the grades listed in Table 2. If the condition of pilling is between two levels, record half level.
[0045] The test result of a single person is the average of the 5 test sample levels tested. The test results of the laboratory samples are the average of the test results of all testers.
[0046] With the consent of the relevant parties, a sample photo rating method can be used to support the evaluation result of the descriptive method.
[0047] The second evaluation method can be used, that is, exercise the sample until the observed pilling is more serious. This assessment can provide data in extreme cases. For example, the pilling situation observed along the plane of the sample surface.
[0048] Record any other conditions of surface changes.
[0049] Table 2 Visual description rating
[0050] series status description 5 No change. 4 The surface is slightly fluffy or slightly pilled. 3 The surface is moderately fluffed or moderately pilled. Balls of different sizes and densities cover the specimen Part of the surface of
