Closure system with distinct breaking forces

Abstract

A closure system includes a first unit that includes a base presenting two opposite faces, a first retaining element arranged on the first face of the base, and a bonding layer arranged on the second face of the base. The closure system also includes a second unit comprising a base presenting two opposite faces, a second retaining element arranged on the first face of the base and adapted to engage the first retaining element, and a bonding layer arranged on the second face of the base. The closure system is characterized in that the bonding layer of at least one of said units comprises two bonding portions presenting distinct breaking forces.

1 . A closure system comprising:
 a first unit comprising a base presenting first and second opposite faces, a first retaining element arranged on the first face of the base, and a bonding layer arranged on the second face of the base and adapted to enable the first unit to be secured on a support surface; and   a second unit comprising a base presenting first and second opposite faces, a second retaining element arranged on the first face of the base, and a bonding layer arranged on the second face of the base and adapted to enable the second unit to be secured on a support surface;   the first and second retaining elements being configured to engage in such a manner as to make a reclosable connection;   the system being characterized in that the bonding layer of at least one of said units comprises two bonding portions, each configured to secure said units on a support surface, and presenting distinct breaking forces.   
     
     
         2 . The system according to  claim 1 , wherein the bonding layer of at least one of said units includes empty portions such that the bonding portions of said at least one unit are disjoint in full or in part. 
     
     
         3 . The system according to  claim 2 , wherein at least one of the empty portions defines a closed cavity, including a sensory marker. 
     
     
         4 . The system according to  claim 1 , wherein each unit further comprises a soleplate forming a support surface, each base being secured to a first face of the associated soleplate by means of its bonding layer. 
     
     
         5 . The system according to  claim 4 , wherein said bonding layers are made by heat-sealing said units on the soleplates. 
     
     
         6 . The system according to  claim 1 , wherein:
 for said at least one unit having two bonding portions presenting distinct breaking forces, the bonding portions define two distinct breaking forces Fr 1  and Fr 2 ; and   the retaining elements define an opening force F;   said forces being such that Fr 1 <F<Fr 2 .   
     
     
         7 . The system according to  claim 1 , wherein each of said retaining elements is formed integrally with the associated base. 
     
     
         8 . The system according to  claim 1 , wherein each of said retaining elements is formed integrally with the associated base and the associated bonding layer. 
     
     
         9 . The system according to  claim 1 , wherein said retaining elements comprise fields of retaining elements, at least one of said retaining elements comprising hooks. 
     
     
         10 . The system according to  claim 1 , wherein at least one of said retaining elements comprises a section member extending in a longitudinal direction. 
     
     
         11 . The system according to  claim 1 , wherein the first and second units are joined, forming a single unit. 
     
     
         12 . The system according to  claim 1 , wherein the bonding layer of each of said units comprises two bonding portions presenting distinct breaking forces. 
     
     
         13 . A container having two side walls defining an opening giving access to an inside volume, said container including a closure system as defined in  claim 1  arranged on its side walls so as to form a reclosable opening. 
     
     
         14 . The container according to  claim 13 , wherein each unit has an internal border and an external border, the internal border being arranged in the inside volume of the container, and the external border being arranged outside of the inside volume of the container, the bonding layer of at least one of the units comprising an inner portion and an outer portion presenting distinct breaking forces, and is configured so that its inner portion presents a breaking force that is smaller than the breaking force of its outer portion. 
     
     
         15 . The container according to  claim 13 , wherein each unit has an internal border and an external border, the internal border being arranged in the inside volume of the container, and the external border being arranged outside of the inside volume of the container, the bonding layer of at least one of the units comprises an inner portion and an outer portion presenting distinct breaking forces, and is configured in such a manner that its outer portion presents a breaking force that is smaller than the breaking force of its inner portion.