Buttons as a clothing accessories, not only has its practical value - to connect clothing, but also has the function of embellishing beautification of clothing. There are hundreds of types of buttons and there are tens of thousands of button types, but the quality of the buttons is uneven. This requires the inspection personnel to accurately grasp the quality standards of various buttons, improve the accuracy and accuracy of detection, and ensure good quality. The following are some of the button detection methods to share to everyone. Basic measurement of button size 1. Use of cable section projectors The cable section projector projects the button at the selected magnification (usually 10 times magnification) on the projection screen, and measures the aperture and hole distance of the bright eye button through the back movement of the screw through the button of the micrometer drum. 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 a pen to trace the edge of the button on squared paper, find out its circumcircle with knowledge of plane geometry, and then measure the circumscribed circle diameter with vernier caliper with an accuracy of 0.02mm. 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 geometry knowledge to find the maximum diagonal distance, and then measure with a vernier caliper with an accuracy of 0.02mm. Accurate to 0.1mm. In addition, some difficult to obtain the outer diameter of non-circular buttons through intuitive methods, in the square 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 physical index of the eye-opening force specified in the GB/T 28491-2012 "General technical requirements for buttons and testing methods of natural shells" standard, 6 buttons were measured and the lowest test result was the final result. 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 the average value of a certain number of buttons does not truly reflect the performance of the buttons. The lowest number of buttons is used to measure the specified number of buttons. The method is more desirable, so for the unsaturated polyester resin buttons eyelet pull can also refer to the natural shellfish buttonhole pull test method to take six button test, take the test minimum as the final result. Button color fastness test method QB/T 3637-1999 "unsaturated polyester resin buttons" does not specify the number of buttons used in each color fastness, can refer to GB/T 29290-2012 "button common technical requirements and testing methods are not Saturated polyester resins." 3 to 12 buttons were sampled from the sample as a sample (18L or less includes 18L and 12 particles; 18L or more and 32L or less includes 32L and 6 particles; 32L or more include 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 cloth†and found in the test that if only Buttons sewn on a 40mm x 100mm multi-fiber interlining cloth cannot accurately inspect the color of the interlining cloth, and the buttons are sewed between two multi-fiber interlining cloths. It may be more scientific to examine the stain of multi-fiber stickers. . Detection of heavy metals and degradable aromatic amine dyes Although some of China's current clothing standards include provisions for heavy metal content and decomposable aromatic amine dyes, for example, FZ/T 81014-2008 "Infant and toddler clothes", GB/T 21295-2007 "Technical requirements for physical and chemical properties of garments," etc. The standard limits the content of ten or so heavy metals, and bans the use of decomposable aromatic amines. However, the standard of the button does not regulate the content of heavy metals and decomposable aromatic amines, and there is no extractable heavy metal in the buttons. The content and the test method of decomposable aromatic amines are introduced. Therefore, the national standards for buttons need to limit the content of extractable heavy metals and decomposable aromatic amines. Researchers must also conduct research on the extractable heavy metal content of buttons and the detection method of decomposable aromatic amines to improve the corresponding standards. . Quality is the foundation of the company's operation. The quality of the brand, the integrity of casting the future. Laser Lint Fabric,Shiny Lint Embroider Fabric,Shiny Laser Fabric,Velvet Laser Fabric Shaoxing Chengao Textile Co.,Ltd , https://www.chengaotextile.com
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