Question

. Bottles containing beverages shall be placed in porous containers containing water at hot edges. What significance does this have for drinks?

Answer 1

For this type of carton, the packaging
material is supplied from a reel and passed
up to a bending roller and shaped into a
tube with longitudinal made at the ends of
the carton giving the tetrahedral shape.
The process is continuous and results in a
chain of filled packages. As the seals are
made under the liquid surface, the packages
have no headspace. The transverse seals
are produced by heat and pressure. First,
the jaws compress the tube of material thus
excluding liquid from the sealing surface.
Secondly, induction heat is supplied,
melting and fusing the plastic. Pressure is
maintained while cooling the seal. The
outer plastic cooling is then heated with a
short pulse to ensure that when opening the
jaws, they do not stick to the packaging
material and possibly pull the seam apart.