Heater product, system and composition

Abstract

A heater product may have a first cavity in which a first part of a heater composition is disposed, a second cavity in which a second part of a heater composition is disposed, and a barrier between the first cavity and the second cavity, such that when the barrier is removed, the first and second parts combine to provide an exothermic reaction. A pull strip may be used to remove the barrier, and at least one reinforcing strip may be used to guide the pull strip. The first part may include calcium oxide and the second part may include water, an reaction-initiation delayer and water-release limiter.

1 . A heater product comprising: 
 a first cavity in which a first part of a heater composition is disposed, the first part comprising calcium oxide;    a second cavity in which a second part of a heater composition is disposed, the second part comprising water, an reaction-initiation delayer and water-release limiter; and    a barrier between the first cavity and the second cavity, such that when the barrier is removed, the first and second parts combine to provide an exothermic reaction.    
   
   
       2 . The heater product according to  claim 1 , wherein the reaction-initiation delayer comprises sugar.  
   
   
       3 . The heater product according to  claim 2 , wherein the sugar comprises sucrose, glucose or fructose.  
   
   
       4 . The heater product according to  claim 1 , wherein the water-release limiter comprises an absorbent, chemically-inert, thermally-resistant material.  
   
   
       5 . The heater product according to  claim 4 , wherein the water-release limiter comprises perlite.  
   
   
       6 . The heater product according to  claim 5 , wherein the reaction-initiation delayer comprises sugar.  
   
   
       7 . The heater product according to  claim 6 , wherein the ratio of water to calcium oxide, by weight, may vary between 0.15:1 and 1.25:1, the ratio of sugar to water, by weight, may vary between 0:1 and 0.05:1, and the ratio of the perlite to water, by weight, may vary between 0:1 to 0.67:1.  
   
   
       8 . The heater product according to  claim 7 , wherein the ratio of water to calcium oxide, by weight, may vary between 0.2:1 and 0.6:1, the ratio of sugar to water, by weight, may vary between 0.01:1 and 0.02:1, and the ratio of the perlite to water, by weight, may vary between 0.06:1 to 0:0.14.  
   
   
       9 . The heater product according to  claim 8 , wherein the ratio of water to calcium oxide, by weight, may vary between 0.25:1 and 0.35:1, the ratio of sugar to water, by weight, may vary between 0.01:1 and 0.02:1, and the ratio of the perlite to water, by weight, may vary between 0.06:1 to 0:0.14.  
   
   
       10 . The heater product according to  claim 8 , wherein the ratio of water to calcium oxide, by weight, is 0.3:1, the ratio of sugar to water, by weight, is 0.015:1, and the ratio of the perlite to water, by weight, is 0.083:1.  
   
   
       11 . The heater product according to  claim 10 , further comprising preservatives.  
   
   
       12 . A heater product comprising: 
 an outer pouch, the outer pouch having a wall with an inner surface that defines an outer pouch cavity and an opening therethrough;    an inner pouch disposed within the outer pouch cavity and attached to the outer pouch, the inner pouch having a wall with an inner surface that defines at least one inner pouch cavity and an outer surface;    a pull strip with a first portion secured to the outer surface of the inner pouch and a second portion disposed through the opening in the outer pouch;    at least one reinforcing strip secured to the outer surface of the inner pouch to guide a tear formed in the wall of the inner pouch when force is applied to the pull strip;    a first part of a heater composition disposed in the outer pouch cavity and a second part of a heater composition disposed in the inner pouch cavity, the first and second parts capable of an exothermic reaction when combined.    
   
   
       13 . The heater product according to  claim 12 , further comprising first and second reinforcing strips, the first and second reinforcing strips secured on either side of the pull strip.  
   
   
       14 . The heater product according to  claim 13 , wherein the first and second reinforcing strips are parallel to the pull strip substantially along the first portion.  
   
   
       15 . The heater product according to  claim 12 , wherein the first portion of the pull strip is aligned with and overlaps the at least one reinforcing strip.  
   
   
       16 . The heater product according to  claim 12 , wherein the at least one reinforcing strip comprises at least one strip of reinforced tape applied to the outer surface of the inner pouch.  
   
   
       17 . The heater product according to  claim 12 , wherein the first part comprises calcium oxide and the second part comprises water.  
   
   
       18 . The heater product according to  claim 17 , wherein the second part comprises a reaction-initiation delayer and a water-release limiter.  
   
   
       19 . The heater product according to  claim 18 , wherein the reaction-initiation delayer comprises sugar and the water-release limiter comprises perlite.  
   
   
       20 . The heater product according to  claim 12 , further comprising a sealing mechanism disposed proximate to the opening, the sealing mechanism including first and second pieces each with a slit formed therethrough and the second portion of the pull strip disposed through the slits in the first and second pieces.  
   
   
       21 . The heater product according to  claim 20 , wherein the sealing mechanism includes a third piece disposed between the first and second pieces, the third piece having a slot formed therethrough that is larger than the slits formed in the first and second pieces, the slot defining a cavity to receive material removed from the pull strip.