Plastic bottle and base cup for a pressurized dispensing system

Abstract

A container for a pressurized dispensing system. The container includes a plastic bottle and a base cup bonded to a rounded bottom of the plastic bottle with a hot melt adhesive. The base cup has a bottom surface that allows the container to stand upright. A method of forming the container is also provided wherein hot melt adhesive is deposited in a recessed region in a top wall of a pedestal of the base cup, and a center region of the rounded bottom of the plastic bottle is pressed against the hot melt adhesive such that the adhesive spreads out over the recessed region and the rest of the top wall of the pedestal. After the hot melt adhesive cools, the bottle is securely bonded to the base cup.

1 . A container for a pressurized dispensing system, the container comprising:
 a bottle including an opening at a top end and a rounded bottom at a bottom end, the bottle being molded from a plastic material; and   a base cup positioned adjacent to the rounded bottom of the bottle, the base cup including (i) a bottom surface that allows the container to stand upright and (ii) a pedestal provided around a center area of the rounded bottom of the bottle, the pedestal including a top wall having a first surface and a continuously curved second surface adjacent to the first surface, wherein a hot melt adhesive provided on the the first surface attaches the base cup to the bottle,   wherein the center area of the rounded bottom of the bottle is spaced from the second surface of the base cup, and   wherein a center axis of the bottle passes through the second surface of the base cup.   
     
     
         2 . The container according to  claim 1 , wherein the adhesive is spread over the second surface of the base cup and the rest of the top wall of the pedestal of the base cup. 
     
     
         3 . A container for a pressurized dispensing system, the container comprising:
 a bottle including an opening at a top end and a rounded bottom at a bottom end, the bottle being molded from a plastic material; and   a base cup positioned adjacent to the rounded bottom of the bottle, the base cup including a bottom surface that allows the container to stand upright and a pedestal provided around a center area of the rounded bottom of the bottle, the pedestal including a top wall, with a recessed area being formed in the top wall, wherein a hot melt adhesive provided on the top wall attaches the base cup to the bottle, with the hot melt adhesive including an acrylic component,   wherein the center area of the rounded bottom of the bottle is spaced from the recessed area of the base cup.   
     
     
         4 . The container according to  claim 3 , wherein the hot melt adhesive includes ethylene-vinyl acetate and the acrylic component. 
     
     
         5 . The container according to  claim 1 , wherein the bottle is formed from polyethylene terephthalate. 
     
     
         6 . The container according to  claim 1 , wherein the base cup is formed from a resin selected from the group consisting of polyethylene terephthalate, polypropylene, and polyester. 
     
     
         7 . The container according to  claim 1 , wherein a plurality of apertures is provided in the bottom surface of the base cup. 
     
     
         8 . A method of forming a pressurized dispensing system, the method comprising:
 heating a hot melt adhesive such that the hot melt adhesive is in a molten state;   applying a plurality of deposits of the molten hot melt adhesive to a pedestal of a base cup;   positioning a rounded bottom of a plastic bottle adjacent to the base cup such that the rounded bottom of the bottle contacts the molten hot melt adhesive and a center area of the rounded bottom of the bottle is spaced from an adjacent continuously curved surface of the pedestal, with a center axis of the bottle passing through the continuously curved surface; and   cooling the molten hot melt adhesive to thereby attach the base cup to the plastic bottle in an area of a top wall of the pedestal that is adjacent to the continuously curved surface of the pedestal.   
     
     
         9 . The method according to  claim 8 , wherein the molten hot melt adhesive forms a layer between the rounded bottom of the bottle and the pedestal of the base cup such that the rounded bottom of the bottle does not contact the pedestal. 
     
     
         10 . The method according to  claim 8 , wherein the hot melt adhesive has a viscosity of 2,500 cps to 5,000 cps when it is applied to the pedestal of the base cup. 
     
     
         11 . The method according to  claim 8 , wherein the hot melt adhesive is heated to a temperature of about 225° F. to about 400° F. when it is applied to the pedestal of the base cup. 
     
     
         12 . The method according to  claim 8 , wherein the hot melt adhesive includes an acrylic component. 
     
     
         13 . The method according to  claim 12 , wherein the hot melt adhesive includes ethylene-vinyl acetate and the acrylic component. 
     
     
         14 . An aerosol dispensing system comprising:
 a bottle including an opening at a top end and a rounded bottom at a bottom end, the bottle being molded from a plastic material, and the bottle containing an aerosol product under pressure;   a spray mechanism attached to the top end of the bottle, the spray mechanism including a nozzle through which the aerosol product can be discharged; and   a base cup positioned adjacent to the rounded bottom of the bottle, the base cup including (i) a bottom surface that allows the container to stand upright and (ii) a pedestal provided around a center area of the rounded bottom of the bottle, the pedestal including a top wall having a first surface and a continuously curved second surface adjacent to the first surface, wherein a hot melt adhesive provided on the the first surface attaches the base cup to the bottle,   wherein the center area of the rounded bottom of the bottle is spaced from the second surface of the base cup, and   wherein a center axis of the bottle passes through the second surface of the base cup.   
     
     
         15 . The system according to  claim 14 , wherein the adhesive is spread on the second surface of the base cup and the rest of the top wall of the pedestal of the base cup. 
     
     
         16 . The system according to  claim 14 , wherein the hot melt adhesive includes an acrylic component. 
     
     
         17 . The system according to  claim 16 , wherein the hot melt adhesive includes ethylene-vinyl acetate and the acrylic component. 
     
     
         18 . The system according to  claim 14 , wherein the bottle is formed from polyethylene terephthalate. 
     
     
         19 . The system according to  claim 14 , wherein the base cup is formed from a resin selected from the group consisting of polyethylene terephthalate, polypropylene, and polyester. 
     
     
         20 . The system according to  claim 14 , wherein a plurality of apertures is provided in the bottom surface of the base cup.