Method for manufacturing waterproof zipper and the device manufactured from the same

Abstract

A method for manufacturing a waterproof zipper comprises steps of: feeding a nylon zipper to a feeding device; passing the nylon zipper to a gluing device and coating PU gel on backsides of the fastener strips of the nylon zipper; adhering a PU film with PU gel on backsides of the fastener strips by using rollers to press the PU film so as to be formed as a waterproof layer; wherein the PU film is adhered on a release paper; heating the PU film and PU gel to be formed as a waterproof layer; cutting the waterproof layer along a center of the waterproof layer so as to form with two waterproof layers are located at the two fastener strips. Thus a waterproof zipper is formed. Finally, the waterproof zipper is guided out. A nylon waterproof zipper is made by using method.

What is claimed is:  
     
         1 . A method for manufacturing a waterproof zipper comprising steps of: 
 (a) feeding a nylon zipper to a feeding device;    (b) passing the nylon zipper to a gluing device and coating PU gel on backsides of the fastener strips of the nylon zipper;    (c) adhering a PU film with PU gel on backsides of the fastener strips by using rollers to press the PU film so as to be formed as a waterproof layer; wherein the PU film is adhered on a release paper;    (d) heating the PU film and PU gel to be formed as a waterproof layer;    (e) cutting the waterproof layer along a center of the waterproof layer so as to be formed with two waterproof layers which are located at the two fastener strips; and thus a waterproof zipper being formed and    (f) guiding the waterproof zipper out.    
     
     
         2 . The method of  claim 1 , wherein after step (c), further comprising a step (c1) of pressing the PU gel into the fastener strips by rollers.  
     
     
         3 . The method of  claim 2 , wherein the steps of (c) and (c1) are repeated through predetermined times.  
     
     
         4 . The method of  claim 2 , wherein after step (c1), a step (c2) is performed for drying the fastener strips.  
     
     
         5 . The method of  claim 1 , wherein after the step (d), a step (d1) is performed for compressing the PU film, PU gel and fastener strips from two sides thereof.  
     
     
         6 . The method of  claim 1 , wherein between step (b) and (c) further comprising a step (b1) of printing pattern on the PU film.  
     
     
         7 . The method of  claim 1 , between step (b) and (c) further comprising a step (b1) of forming textures on the PU film.  
     
     
         8 . The method of  claim 1 , wherein before step (c), the PU film is pressed at two sides.  
     
     
         9 . A method for manufacturing a waterproof zipper comprising a step of: 
 (a) feeding a nylon zipper to a feeding device;    (b) passing the nylon zipper to a gluing device and coating PU gel on backsides of the fastener strips of the nylon zipper;    (c) pressing the PU gel into the fastener strips by using capillary effect;    (d) vaporizing solvent in the PU gel in a drying box;    (e) adhering a PU film with PU gel on backsides of the fastener strips by using rollers to press the PU film so as to be formed as a waterproof layer; wherein the PU film is adhered on a release paper;    (f) heating the PU film and PU gel to be formed as a waterproof layer;    (g) cutting the waterproof layer along a center of the waterproof layer so as to be formed with two waterproof layers which are located at the two fastener strips; and thus a waterproof zipper being formed and    (h) guiding the waterproof zipper out.    
     
     
         10 . The method of  claim 9 , wherein after heating step, further comprising a step of extruding the PU film, PU gel and fastener strips so as to firmly combine the PU film, PU gel and fastener strips.  
     
     
         11 . The method of  claim 9 , wherein after heating step, further comprising a step of extruding the PU film, PU gel and fastener strips so as to firmly combine the PU film, PU gel and fastener strips.  
     
     
         12 . The method of  claim 9 , wherein between steps (d) and (e) further comprising a step (d1) of printing patterns on the PU film.  
     
     
         13 . The method of  claim 9 , between steps (d) and (e) further comprising a step (d1) of forming textures on the PU film.  
     
     
         14 . The method of  claim 9 , between step (d) and (e), further comprising steps of: 
 output the nylon zipper by a guide device;    feeding a nylon zipper to a feeding device;    
     
     
         15 . The method of  claim 14 , wherein after heating step, further comprising a step of compressing the PU film, PU gel and fastener strips at two sides so as to firmly combine the PU film, PU gel and fastener strips.  
     
     
         16 . A nylon waterproof zipper comprising two symmetric fastener strips; each fastener strip has a front surface and a back surface; an inner side of the front surface of each fastener strip having a cord thread protruded from the surface; two chains being mounted along the cord threads, respectively; the cord threads being fixed to the fastener strips, respectively; the two chains being engaged by a coupling slider; a back surface of each fastener strip being combined with a thin waterproof layer; characterized in that: 
 a back surface of each fastener strip is permeated with PU gel; and then a PU film is adhered to the back surface by thermal plastic stage so as to be formed as a waterproof layer which includes an inner layer of the PU gel permeating into the fastener strips and an outer layer at an outer side of the fastener strips.    
     
     
         17 . The nylon waterproof zipper as claimed in  claim 1 , wherein the waterproof layer is formed with textures.  
     
     
         18 . The nylon waterproof zipper as claimed in  claim 1 , wherein a thickness of the inner layer is over one third of each fastener strip.  
     
     
         19 . The nylon waterproof zipper as claimed in  claim 1 , wherein a thickness of the inner layer is over one half of each fastener strip.