Spa cover

Abstract

A spa cover includes an internal heat insulation material having an outer covering which is impermeable to water and water vapor. It absorbs very little water significantly increasing the life of the spa cover. The outer cover is created from a poly halogenated vinyl polymer designed to significantly decrease pore size and water vapor permeability. The outer cover is also laminated from several layers of the poly halogenated vinyl polymer each having a ‘grain’. The grains are angularly offset to further reduce water vapor permeability.

1 . An improved spa cover comprising:
 a) a core insulating material; and   b) an outer cover that surrounds the entire core insulating material, wherein the outer cover includes at least two laminate layers each having a ‘grain’ and the grains of the laminated layers having an angular offset with respect to each other.   
   
   
       2 . The improved spa cover of  claim 1  wherein at least one of the laminate layers is made from poly-halogenated vinyl monomers. 
   
   
       3 . The improved spa cover of  claim 1  wherein at least one of the laminate layers is made from poly-vinylidene chloride (PVDC) resin. 
   
   
       4 . The improved spa cover of  claim 1  wherein at least one of the laminate layers is made from a high density polyethylene (HDPE) resin. 
   
   
       5 . The improved spa cover of  claim 1  wherein the outer cover exhibits a water vapor permeability of less than 0.09 gm (100 in 2 -day). 
   
   
       6 . The improved spa cover of  claim 1  wherein the angular offset between the grains of at least two of the laminate layers have angular offsets of up to 90 degrees. 
   
   
       7 . The improved spa cover of  claim 1  wherein the angular offset between the grains of at least two of the laminate layers have angular offsets of approximately 45 degrees. 
   
   
       8 . The improved spa cover of  claim 1  wherein said cover is a one-piece cover. 
   
   
       9 . The improved spa cover of  claim 1  wherein said spa cover does not include a hinge. 
   
   
       10 . The improved spa cover of  claim 1  wherein the laminated layers are of the same material. 
   
   
       11 . The improved spa cover of  claim 1  wherein the laminated layers are of a different material. 
   
   
       12 . A method of creating an improved spa cover comprising the steps of:
 a) providing a core insulating material;   b) creating an outer cover having at least two laminate layers each having a ‘grain’ and the grains of the laminated layers having an angular offset with respect to each other; and   c) covering the entire core insulating material with the outer cover material to create a waterproof and air-tight spa cover.   
   
   
       13 . The method of creating an improved spa cover of  claim 12  wherein the step of creating an outer cover includes using laminate layers made from a poly-halogenated vinyl monomers. 
   
   
       14 . The method of creating an improved spa cover of  claim 12  wherein the step of creating an outer cover includes using laminate layers made from poly-vinylidene chloride (PVDC) resin. 
   
   
       15 . The method of creating an improved spa cover of  claim 12  wherein the step of creating an outer cover includes using laminate layers having grains offset up to 45 degrees. 
   
   
       16 . The method of creating an improved spa cover of  claim 12  wherein the cover is a one-piece cover. 
   
   
       17 . The method of creating an improved spa cover of  claim 12  wherein the cover does not include a hinge. 
   
   
       18 . The method of creating an improved spa cover of  claim 12  wherein the step of creating an outer cover includes using laminate layers that are the same material. 
   
   
       19 . The method of creating an improved spa cover of  claim 12  wherein the step of creating an outer cover includes using laminate layers that are different materials.