Waterproof zipper

Abstract

A waterproof zipper having a back surface of each fastener strip is permeated with solvent-based PU adhesive contains solid contents 34˜36% toluene or methyl-ethyl-ketone 64˜66% with a viscosity 60,000˜90,000 cps at 25° C. and hardener contains butyl-acetate 23˜27%, polyisocyanate 73˜77%; 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 permeating into the fastener strips and an outer layer at an outer side of the fastener strips.

1 . 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 solvent-based PU adhesive contains solid contents 34˜36% toluene or methyl-ethyl-ketone 64˜66% with a viscosity 60,000˜90,000 cps at 25° C. and hardener contains butyl-acetate 23˜27%, polyisocyanate 73˜77%; 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 permeating into the fastener strips and an outer layer at an outer side of the fastener strips.  
   
   
       2 . The nylon waterproof zipper as claimed in  claim 1 , wherein the waterproof layer is formed with textures.  
   
   
       3 . The nylon waterproof zipper as claimed in  claim 1 , wherein the waterproof layer is formed with printing patterns.  
   
   
       4 . The nylon waterproof zipper as claimed in  claim 1 , wherein a thickness of the inner layer is over one third of each fastener strip.  
   
   
       5 . The nylon waterproof zipper as claimed in  claim 1 , wherein a thickness of the inner layer is over one half of each fastener strip.