Brush for use with a composition

Abstract

A brush suitable for use as part of a product dispensing container which includes various characteristics which provide desirable product performance during use.

1 . A brush comprising:
 a) a base, and   b) a plurality of bristles, said plurality of bristles having a distal end and a proximal end, wherein said distal end is attached to the base and said proximal end forms a skin contacting region;   c) wherein said plurality of bristles have an average length of from about 0.1 to about 2 inches;   d) wherein said plurality of bristles comprises at least one bristle having a diameter of from about 0.001 inches to about 0.01 inches;   e) wherein said plurality of bristles comprises at least one bristle comprising a material having a young's modulus of from about 0.2 GPa to about 9 GPa;   f) wherein said brush has a bristle concentration of from about 0.5 bristle per mm 2  to 25 bristles per mm 2      g) wherein said brush forms a brush head which is operably attached to a product dispensing container including a composition, and   h) wherein said brush comprises a dispensing tube in fluid communication with the product dispensing container and the brush.   
     
     
         2 . The brush of  claim 1 , further comprising a bristle concentration ratio from distal end to proximal end of from about 1:1 to about 20:1. 
     
     
         3 . The brush of  claim 2 , wherein said the cross sectional area of the plurality of bristles is not largest at the proximal end. 
     
     
         4 . The brush of  claim 1 , wherein the plurality of bristles comprises at least one crimped bristle. 
     
     
         5 . The brush of  claim 4 , wherein the at least one crimped bristle comprises a crimp depth from about 0.010 inch to about 0.020 inch. 
     
     
         6 . The brush of  claim 5 , wherein said crimped bristle has a crimp frequency of from about 3 to about 7 crimps per inch. 
     
     
         7 . The brush of  claim 1 , wherein said plurality of bristles forms a recess having a depth of from about 0.010 inch to about 1 inch. 
     
     
         8 . The brush of  claim 1 , wherein at least one of said plurality of bristles comprises a material selected from the group consisting of: nylon, a natural hair, polybutylene terephthalene, polyester, polybutylene terphthalate, and mixtures thereof. 
     
     
         9 . The brush of  claim 1 , wherein the compositions is selected from the group consisting of: cosmetics, lotions, body washes, shampoos, shave preparations, and mixtures thereof. 
     
     
         10 . The brush of  claim 1 , wherein at least one of said bristles comprises a tapered tip at the proximal end. 
     
     
         11 . The brush of  claim 1 , wherein at least one of said bristles comprises a rounded tip at the proximal end. 
     
     
         12 . A brush comprising:
 a. a base having a top surface comprising a non-flat region, and   b. a plurality of bristles, said plurality of bristles having a distal end and a proximal end, wherein said distal end is attached to the top surface of said base and said proximal end forms a skin contacting region.   
     
     
         13 . The brush of  claim 12 , wherein said non-flat region comprises a concave region, a convex region, or a combination there. 
     
     
         14 . The brush of  claim 12 , wherein the non-flat region has a depth of from about 0.5 mm to about 25 mm. 
     
     
         15 . The brush of  claim 12 , wherein said plurality of bristles comprises at least one crimped bristle. 
     
     
         16 . The brush of  claim 15 , wherein the at least one crimped bristle comprises a crimp depth from about 0.010 inch to about 0.020 inch. 
     
     
         17 . The brush of  claim 15 , wherein said crimped bristle has a crimp frequency of from about 3 to about 7 crimps per inch. 
     
     
         18 . The brush of  claim 15 , wherein said brush has a bristle concentration of from about 1 bristle per mm 2  to 25 bristles per mm 2 . 
     
     
         19 . The brush of  claim 12 , wherein said non-flat region comprises a concave region, wherein said plurality of bristles comprises at least one crimped bristle, wherein the at least one crimped bristle comprises a crimp depth from about 0.010 inch to about 0.020 inch, wherein said crimped bristle has a crimp frequency of from about 3 to about 7 crimps per inch, and wherein said brush has a bristle concentration of from about 1 bristle per mm 2  to 25 bristles per mm 2 .