Fluid-impervious slide fastener, manufacturing method thereof and product having same

A fluid-impervious slide fastener, including:

• a pair of support tapes each having a top surface, a bottom surface and an inner side edge, wherein a bottom inner edge of each of said bottom surfaces is disposed with a plurality of continuous coupling elements arranged in a row manner, a gap filling member composed of a high polymer elastomer member is disposed in a plurality of adjacent gaps of said plurality of continuous coupling elements, said gap filling member is longitudinally extended and adhered to a corresponding said bottom inner edge and a corresponding said inner side edge, and a slit covering member is transversally formed above said plurality of continuous coupling elements;
• said slit covering member has a left covering member having a left cutting end surface and a right covering member having a right cutting end surface, and a central slit has a width after said slider fastener is coupled;
• said top surface of one said support tape at a left side and said left covering member are transversally adhered with a waterproof layer, said top surface of another said support tape at a right side and said right covering member are transversally adhered with another waterproof layer, and a covering layer extended from each of said waterproof layers is able to longitudinally cover at least one portion of said left cutting end surface and at least one portion of said right cutting end surface, so that, when said plurality of continuous coupling elements are in an uncoupled status, a first covering body having a first length is jointly defined by said left covering member and said covering layer, and a second covering body having a second length is jointly defined by said right covering member and said covering layer;
• when said plurality of continuous coupling elements are in a coupled status, a sum of said first length and said second length is greater than said width of said central slit, so that said first covering body and said second covering body are able to elastically abut against each other so as to form a tightening deformation, and a covering abutting member having a fluid-impervious function to a fluid is formed in said central slit.