Body support articles comprising viscoelastic foams and pyrethroids and/or support members and pyrethroids

Abstract

A body support article, wherein the body support article comprises a top face, a bottom face opposed to the top face, a left side face, a right side face opposed to the left side face, a head side face, and a foot side face opposed to the head side face, the body support article comprising a viscoelastic foam layer; and a pyrethroid, wherein the pyrethroid is disposed in a first zone of the body support article, wherein the first zone consists of a volume of the body support article having an upper first zonal face. Methods of making body support articles comprising a pyrethroid.

What is claimed is: 
     
         1 . A body support article, wherein the body support article comprises a top face, a bottom face opposed to the top face, a left side face, a right side face opposed to the left side face, a head side face, and a foot side face opposed to the head side face, the body support article comprising:
 a viscoelastic foam layer; and   a pyrethroid, wherein the pyrethroid is disposed in a first zone of the body support article, wherein the first zone consists of a volume of the body support article having an upper first zonal face.   
     
     
         2 . The body support article of  claim 1 , wherein the pyrethroid is selected from the group consisting of allethrin; bifenthrin; cyfluthrin; cypermethrin; cyphenothrin; deltamethrin; esfenvalerate; etofenprox; fenpropathrin; fenvalerate; flucythrinate; flumethrin; imiprothrin; λ-cyhalothrin; metofluthrin; permethrin; prallethrin; resmethrin; silafluofen; sumithrin; τ-fluvalinate; tefluthrin; tetramethrin; tralomethrin; and transfluthrin. 
     
     
         3 . The body support article of  claim 1 , wherein the pyrethroid is permethrin. 
     
     
         4 . The body support article of  claim 3 , wherein the permethrin is present in the first zone in a concentration from 1 weight part per trillion weight parts of the first zone to 1 weight part per thousand weight parts of the first zone. 
     
     
         5 . The body support article of  claim 1 , further comprising a support member, and wherein the first zone is coincident with a member encasing the support member. 
     
     
         6 . The body support article of  claim 1 , wherein the first zone further comprises a lower first zonal face, wherein the lower first zonal face is more than 0.25 inches (0.64 cm) and less than 6 inches (15 cm) from the upper first zonal face. 
     
     
         7 . The body support article of  claim 1 , wherein the viscoelastic foam layer has an upper foam face, wherein the upper foam face is coincident with the top face of the body support article. 
     
     
         8 . The body support article of  claim 7 , wherein the viscoelastic foam layer has a lower foam face, wherein the lower foam face is more than 0.25 inches (0.64 cm) and less than 6 inches (15 cm) from the upper foam face. 
     
     
         9 . The body support article of  claim 7 , wherein the viscoelastic foam layer has a lower foam face, wherein the lower foam face is coincident with the bottom face of the body support article. 
     
     
         10 . The body support article of  claim 1 , wherein the pyrethroid is further disposed in a second zone of the body support article, wherein the second zone comprises a second zonal face. 
     
     
         11 . The body support article of  claim 10 , wherein every point on the second zonal face is coincident with a point on one of the bottom face, the left side face, the right side face, the head side face, and the foot side face. 
     
     
         12 . The body support article of  claim 1 , further comprising a secondary insecticide. 
     
     
         13 . The body support article of  claim 12 , wherein the secondary insecticide is selected from the group consisting of dimethyl sulfoxide (DMSO), chlorfenapyr, imidacloprid, fipronil, indoxacarb, abamectin, hydroprene, benzyl benzoate, ivermectin, antibiotic miticides, carbamate miticides, formamidine miticides, organochlorine, organophosphate miticides, diatomaceous earth, and dicofol. 
     
     
         14 . The body support article of  claim 1 , wherein the body support article is a mattress, a mattress topper, a pillow, or a cushion. 
     
     
         15 . A method, comprising:
 combining at least one polyol and a pyrethroid, to yield a first zone precursor composition;   foaming the first zone precursor composition with at least one isocyanate, to form a first zone comprising a viscoelastic foam and the pyrethroid, and   forming a body support article comprising the first zone, wherein the body support article comprises a top face, a bottom face opposed to the top face, a left side face, a right side face opposed to the left side face, a head side face, and a foot side face opposed to the head side face.   
     
     
         16 . The method of  claim 15 , wherein the pyrethroid is selected from the group consisting of allethrin; bifenthrin; cyfluthrin; cypermethrin; cyphenothrin; deltamethrin; esfenvalerate; etofenprox; fenpropathrin; fenvalerate; flucythrinate; flumethrin; imiprothrin; λ-cyhalothrin; metofluthrin; permethrin; prallethrin; resmethrin; silafluofen; sumithrin; τ-fluvalinate; tefluthrin; tetramethrin; tralomethrin; and transfluthrin. 
     
     
         17 . The method of  claim 15 , wherein the pyrethroid is permethrin. 
     
     
         18 . The method of  claim 17 , wherein the permethrin is present in the first zone in a concentration from 1 weight part per trillion weight parts of the first zone to 1 weight part per thousand weight parts of the first zone. 
     
     
         19 . The method of  claim 15 , wherein the first zone comprises an upper first zonal face. 
     
     
         20 . The method of  claim 15 , further comprising:
 incorporating a support member into the body support article, and   encasing the support member with an encasing member comprising the first zone.   
     
     
         21 . The method of  claim 15 , wherein the first zone further comprises a lower first zonal face, wherein the lower first zonal face is more than 0.25 inches (0.64 cm) and less than 6 inches (15 cm) from the upper first zonal face. 
     
     
         22 . The method of  claim 15 , further comprising:
 forming a second zone comprising a second viscoelastic foam and the pyrethroid, wherein the second zone comprises a second zonal face;   wherein forming the body support article further comprises including the second zone in the body support article.   
     
     
         23 . The method of  claim 22 , wherein the second zone is formed such that every point on the second zonal face is coincident with a point on one of the bottom face, the left side face, the right side face, the head side face, and the foot side face. 
     
     
         24 . The method of  claim 15 , further comprising including a secondary insecticide in the body support article. 
     
     
         25 . The method of  claim 24 , wherein the secondary insecticide is selected from the group consisting of dimethyl sulfoxide (DMSO), chlorfenapyr, imidacloprid, fipronil, indoxacarb, abamectin, hydroprene, benzyl benzoate, ivermectin, antibiotic miticides, carbamate miticides, formamidine miticides, organochlorine, organophosphate miticides, diatomaceous earth, and dicofol. 
     
     
         26 . The method of  claim 15 , wherein the body support article is a mattress, a mattress topper, a pillow, or a cushion. 
     
     
         27 . A system, comprising:
 a processing controller configured to control a body support article manufacturing system; and   the body support article manufacturing system, wherein the body support article manufacturing system is configured to:   combine at least one polyol and a pyrethroid, to yield a first zone precursor composition;   foam the first zone precursor composition with at least one isocyanate, to form a first zone comprising a viscoelastic foam and the pyrethroid, and   form a body support article comprising the first zone, wherein the body support article comprises a top face, a bottom face opposed to the top face, a left side face, a right side face opposed to the left side face, a head side face, and a foot side face opposed to the head side face.