About Hardware diamond buttons off problem

Button said something a little harder when you hit some metal diamond buttons on clothes fell down, how could this happen? The wonder l. This problem occurs with the product, to fight the fight and die fabrics are likely to have a relationship. This phenomenon has occurred before we see the next product itself quality problems, first check whether the firm appearance buttons, twist the product to see whether there will be loose buttons to view the distribution of the staple leg length is long enough by hand, enough hard, etc., if the hardware buttons is nothing wrong then we will see whether the play mode with product support, as well as the vertical distance between the mold and other mold is appropriate, if the product is no problem with the play mode, then we have to check under the cloth to play , the fabric thickness, elasticity etc. will also cause the button off (especially thin fabrics with stretch and can easily lead to off button).