Button detection method
Buttons, as a kind of clothing accessories, not only serve as connectors in clothing, but also play a role of embellishment and decoration. The resin button made of polyester as raw material is expensive and suitable for high-end clothing; various metal buttons are light and hard to change color, and can also stamp the pattern and the mark of the garment manufacturer; the texture of the shell button is elegant and the color of light is bright. Has been welcomed by consumers; made of fabrics or fabrics near the color of the disk buckle and bag buckle, can make clothing with national style and handicraft value. In spite of this, the quality of the buttons is also uneven, which requires the inspectors to improve the accuracy and accuracy of the tests while thoroughly understanding the standards, and thus pay close attention to the quality of the buttons. The following are three reflections in the button detection work for you to share. Button basic size measurement 1. Cable Section Projector Use Cable Section Projector The projector will project the button on the projection screen at the selected magnification (usually 10 times magnification), measure the diameter of the bright eye button through the micrometer drum moving button and the return stroke of the screw. And hole spacing. The use of a cable section projector to measure the aperture and the hole pitch of the eye button is more convenient than the reading microscope and has the advantage of accurate measurement. It is also more intuitive. 2. The use of geometric methods The outer diameter of the round button is measured directly with a vernier caliper with an accuracy of 0.02 mm. If it is a non-circular polyester button, use the pen to draw the edge of the button on squared paper, find out its circumcircle with knowledge of plane geometry, and then measure the circumcircle diameter with a vernier caliper with an accuracy of 0.02mm to the nearest 0.1mm. . If it is a non-circular shellfish button or a non-circular copper button, use the pen to draw the edge of the button on the square paper, use the geometric knowledge to find the maximum diagonal distance, and then use a vernier caliper with an accuracy of 0.02mm to measure to the nearest 0.1mm. In addition, some difficult to intuitively obtain the outer diameter of non-circular buttons, in rectangular paper can be established in the rectangular coordinate system, through the knowledge of analytical geometry can also calculate the diameter of the circumcircle or the maximum diagonal distance. Eye hole pull test For the GB/T 28491-2012 "General technical requirements for buttons and testing methods of natural shells" standard specified in the eye hole pull this physical index measured 6 button, with the lowest test results as the final result. However, QB/T 3637-1999 "unsaturated polyester resin buttons" does not specify the number of eye-hole tensile measurements and the expression of the final results. Because the buttons of the same specification and specifications have great differences in physical and mechanical properties, the method of taking a certain number of buttons to average does not truly reflect the performance of the buttons. It is more desirable to take the minimum number of measurements by taking the specified number of buttons. Therefore, for the unsaturated polyester resin button's eye hole pull can also refer to the natural shellfish button eye hole pull test method to take 6 button test, take the test minimum as the final result. Button color fastness test method QB/T 3637-1999 "unsaturated polyester resin button" does not specify the number of buttons used in each color fastness, can refer to GB/T 29290-2012 "universal button common technical requirements and detection methods unsaturated polyester Resins. Three to 12 buttons were sampled from the sample as samples (18L including 18L and 12 particles; 18L and 32L including 32L and 6 particles; 32L and 32L and 3 particles). The description of the method for washing fastness of shell buttons and brass buttons in the standard is “Sew the buttons with a white thread on a 40mm×100mm multi-fiber interlining clothâ€. It was found in the test that if only the buttons were sewn A piece of 40mm×100mm multi-fiber interlining cloth cannot accurately inspect the stain of the interlining cloth, and the button is sewed between two multi-fiber cloth interlining cloths. It may be more scientific to examine the stain of the multi-fiber patch liner. SHAOXING LIDONG TRADING CO.,LTD , https://www.lidong-garment.com