In general, fixation using sewing or fixation using ultrasonic waves and high frequency was used for mask earring straps. In order to solve the problem, the method of fixing the earring straps enables bonding using heat. Sewing, ultrasonic and high-frequency methods destroy the treated surface during waterproofing and water-repellent treatment to block splashes. To solve the problem, heat-bonding is done using seam sealing tape that is waterproof and water-repellent. Sewing and fixing method using ultrasonic waves and high frequency have several stages of work. To solve the problem, attach the four sides of the mask with seam sealing tape. In general, in order to adjust the earring strap of the mask to suit the user, It was used by tying an adjustment ring or string. To solve the problem, you can adjust the earring string to the size you want by using the material of the earring string as a seam sealing tape and using heat bonding to cut or fold it to the size you want the string to be used for, and then attach it using an iron or heat sealer. have.
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