초록 ▼

A laminate structure (e.g., hot or cold wrap) formed from outer substrates that are bonded together to form at least one pocket is provided. The pocket is separated by an inner substrate such that the pocket defines an upper pocket region and a lower pocket region, each of which contains a reactant

A laminate structure (e.g., hot or cold wrap) formed from outer substrates that are bonded together to form at least one pocket is provided. The pocket is separated by an inner substrate such that the pocket defines an upper pocket region and a lower pocket region, each of which contains a reactant. Due to the presence of the inner substrate, the reactants do not intermix prior to activation of the laminate structure. To activate the laminate structure, a tension force is exerted so that the inner substrate ruptures, thereby allowing the reactants to freely intermix and produce the desired result. For example, in some instances, the reactants undergo and exothermic or endothermic reaction so that the laminate structure may be utilized as a hot or cold wrap.

대표청구항 ▼

What is claimed is: 1. A laminate structure comprising: an inner substrate that ruptures upon the application of a tensile force in a longitudinal direction; extensible first and second outer substrates, wherein said inner substrate is positioned between and bonded to said first and said second ou

What is claimed is: 1. A laminate structure comprising: an inner substrate that ruptures upon the application of a tensile force in a longitudinal direction; extensible first and second outer substrates, wherein said inner substrate is positioned between and bonded to said first and said second outer substrates to define at least one pocket having an upper pocket region formed from the first outer substrate and a lower pocket region formed from the second outer substrate, wherein said tensile force does not cause said first and said second substrates to substantially rupture; a first reactant contained within said upper pocket region; and a second reactant contained within said lower pocket region, wherein said first reactant and said second reactant are intermixed when said inner substrate is ruptured, said intermixing causing said reactants to undergo an endothermic or exothermic reaction. 2. A laminate structure as defined in claim 1, wherein said first and said second outer substrates are selected from the group consisting of nonwoven webs, films, woven fabrics, knitted fabrics and combinations thereof. 3. A laminate structure as defined in claim 1, wherein at least one of said outer substrates contains a film. 4. A laminate structure as defined in claim 1, wherein at least one of said outer substrates contains a nonwoven web. 5. A laminate structure as defined in claim 1, wherein at least one of said extensible outer substrates contains an elastomeric material. 6. A laminate structure as defined in claim 1, wherein at least one of said extensible outer substrates has a length greater than the length of said inner substrate. 7. A laminate structure as defined in claim 6, wherein at least one of said extensible outer substrates is folded. 8. A laminate structure as defined in claim 1, wherein said outer substrates are capable of extending at least about 30% in said longitudinal direction. 9. A laminate structure as defined in claim 1, wherein said outer substrates are capable of extending at least about 50% in said longitudinal direction. 10. A laminate structure as defined in claim 1, wherein said outer substrates are capable of extending at least about 75% in said longitudinal direction. 11. A laminate structure as defined in claim 1, wherein said inner substrate is selected from the group consisting of nonwoven webs, films, woven fabrics, knitted fabrics and combinations thereof. 12. A laminate structure as defined in claim 1, wherein said inner substrate contains a film. 13. A laminate structure as defined in claim 12, wherein said film is prestretched and contains a filler. 14. A laminate structure as defined in claim 1, wherein said inner substrate is impermeable to said first reactant and said second reactant. 15. A laminate structure as defined in claim 1, wherein two longitudinal edges and one transverse edge of said first substrate and said second substrate are bonded together. 16. A laminate structure as defined in claim 15, wherein said inner substrate is also bonded to said two longitudinal edges and said transverse edge of said first and said second outer substrates. 17. A laminate structure as defined in claim 16, wherein said inner substrate remained unbonded to an additional transverse edge of said first and said second outer substrates. 18. A laminate structure as defined in claim 16, wherein said bonds between said outer substrates and between said outer substrates and said inner substrate do not break upon application of said tensile force. 19. A laminate structure as defined in claim 1, wherein said laminate structure comprises multiple pockets. 20. A laminate structure as defined in claim 1, wherein at least a portion of said multiple pockets are aligned in series. 21. A wrap comprising: an inner substrate that ruptures upon the application of a tensile force in a longitudinal direction; a first and second outer substrate that extend at least about 30% in said longitudinal direction upon application of said tensile force without substantially rupturing, wherein said inner substrate is positioned between and bonded to said first and said second outer substrates to define multiple pockets aligned in series, wherein each of said pockets has an upper pocket region formed from the first outer substrate and a lower pocket region from the second outer substrate; a first reactant contained within said upper pocket region of at least a portion of said pockets; and a second reactant contained within said lower pocket region of said pockets that also contain said first reactant, wherein said first reactant and said second reactant are intermixed when said inner substrate is ruptured, said intermixing causing said reactants to undergo an endothermic or exothermic reaction. 22. A wrap as defined in claim 21, wherein said outer substrates contain a film, a nonwoven web, or combinations thereof. 23. A wrap as defined in claim 21, wherein at least one of said outer substrates contains an elastomeric material. 24. A wrap as defined in claim 21, wherein at least one of said outer substrates is folded. 25. A wrap as defined in claim 21, wherein said outer substrates are capable of extending at least about 50% in said longitudinal direction upon application of said tensile force. 26. A wrap as defined in claim 21, wherein said outer substrates are capable of extending at least about 75% in said longitudinal direction upon application of said tensile force. 27. A wrap as defined in claim 21, wherein said inner substrate contains a film. 28. A wrap as defined in claim 21, wherein two longitudinal edges and one transverse edge of said first substrate and said second substrate are bonded together. 29. A wrap as defined in claim 28, wherein said inner substrate is also bonded to said two longitudinal edges of said first and said second outer substrates. 30. A wrap as defined in claim 29, wherein said inner substrate remained unbonded to an additional transverse edge of said first and said second outer substrates. 31. A laminate structure as defined in claim 1, wherein said intermixing causes said reactants to undergo an exothermic reaction. 32. A laminate structure as defined in claim 1, wherein said intermixing causes said reactants to undergo an endothermic reaction. 33. A wrap as defined in claim 21, wherein said intermixing causes said reactants to undergo an exothermic reaction. 34. A wrap as defined in claim 21, wherein said intermixing causes said reactants to undergo an endothermic reaction.