Method of making spun bond web from multicomponent filaments

Abstract

A spun bond mat, after collection on a perforated surface is consolidated by high velocity water jets and then subjected to heat treatment to crinkle or crimp the bicomponent or other multicomponent synthetic resin filaments.

I claim:  
     
         1 . A method of making a filament web, comprising the st ps of: 
 (a) extruding multicomponent filaments consisting of at least two synthetic-resin components;    (b) depositing said multicomponent filaments in a mat upon a support;    (c) consolidating the mat of multicomponent filaments to a web by subjecting said mat to a water jet treatment; and    (d) heat treating said web to effect crinkling of the filam nts thereof and bulking of the web.    
     
     
         2 . The method defined in  claim 1  wherein the multicomponent filaments produced in step (a) are bicomponent filam nts.  
     
     
         3 . The method defined in  claim 2  wherein said multicomponent filaments have the components thereof in side-by-side relationship.  
     
     
         4 . The method defined in  claim 3  wherein said h at tr ating of said web in step (d) is a treatment of said web with hot air.  
     
     
         5 . The method defined in  claim 1  wherein said multicomponent filaments have the components thereof in side-by-side relationship.  
     
     
         6 . The method defined in  claim 5  wherein said heat treating of said web in step (d) is a treatment of said web with hot air.  
     
     
         7 . The method defined in  claim 1  wherein said heat treating of said web in step (d) is a treatment of said web with hot air.