Cutting filament with improved composition for edge trimmers, scrub cutters, and the like

Abstract

This invention is directed to a cutting filament for a plant-cutting device such as a scrub cutter or edge trimmer. According to the invention, at least one portion of the filament is made on the basis of a mixture of polyamide 6-6 and of a softening agent. A filament with improved mechanical properties is thereby achieved.

1 . A cutting filament for a plant-cutting device such as a scrub cutter or edge trimmer, wherein at least one portion of the filament is made on the basis of polyamide 6-6 enriched with a softening agent.  
     
     
         2 . The cutting filament of  claim 1 , wherein the softening agent comprises caprolactam.  
     
     
         3 . The cutting filament of  claim 2 , wherein the softening agent essentially consists of caprolactam.  
     
     
         4 . The cutting filament of  claim 1 , wherein the filament comprises a first portion forming a body of the filament and a second portion forming at least one area for attacking plants, said first portion being made on the basis of a mixture of polyamide 6-6 and a softening agent.  
     
     
         5 . The cutting filament of  claim 4 , wherein said second portion is also made on the basis of polyamide 6-6.  
     
     
         6 . The cutting filament of  claim 5 , wherein the second portion also contains a softening agent and the first portion contains a larger proportion of softening agent than the second portion.  
     
     
         7 . The cutting filament of  claim 6 , wherein the first portion contains from 6 to 15% of caprolactam.  
     
     
         8 . The cutting filament of  claim 7 , wherein the first portion contains from 11 to 14% of caprolactam.  
     
     
         9 . The cutting filament of claimed in  claim 6 , wherein the second portion contains from 0 to 4% of caprolactam.  
     
     
         10 . The cutting filament of  claim 5 , wherein the second portion contains at least one filler product.  
     
     
         11 . A cutting filament for a plant-cutting device such as a scrub cutter or edge trimmer, comprising a first portion forming a body of the filament and a second portion forming at least one area for attacking plants, wherein said first portion is made on the basis of a mixture of polyamide 6-6 and a softening agent.  
     
     
         12 . The cutting filament of  claim 11 , wherein said second portion is also made on the basis of polyamide 6-6.  
     
     
         13 . The cutting filament of  claim 12 , wherein the second portion also contains a softening agent, and the first portion contains a larger proportion of softening agent than the second portion.  
     
     
         14 . The cutting filament of  claim 13 , wherein the first portion contains from 6 to 15% of caprolactam.  
     
     
         15 . The cutting filament of  claim 14 , wherein the first portion contains from 11 to 14% of caprolactam.  
     
     
         16 . The cutting filament of  claim 13 , wherein the second portion contains from 0 to 4% of caprolactam.  
     
     
         17 . The cutting filament of  claim 12 , wherein the second portion contains at least one filler product.  
     
     
         18 . A cutting filament for a plant-cutting device such as a scrub cutter or edge trimmer, comprising a first portion forming a body of the filament and a second portion forming at least one area for attacking plants, said first portion being made on the basis of a mixture of polyamide 6-6 and a softening agent, wherein said second portion is essentially distributed in two areas of the filament laid out sideways opposite to each other in the working position of the filament.  
     
     
         19 . The cutting filament of  claim 18 , wherein said second portion is also made on the basis of polyamide 6-6.  
     
     
         20 . A cutting filament as claimed in  claim 19 , wherein the second portion also contains a softening agent, and the first portion contains a larger proportion of softener than the second portion.  
     
     
         21 . The cutting filament of  claim 20 , wherein the first portion contains from 6 to 15% of caprolactam.  
     
     
         22 . The cutting filament of  claim 21 , wherein the first portion contains from 11 to 14% of caprolactam.  
     
     
         23 . The cutting filament of  claim 20 , wherein the second portion contains from 0 to 4% of caprolactam.  
     
     
         24 . The cutting filament of  claim 19 , wherein the second portion contains at least one filler product.