Description of the Cap
MaxiCrown is suitable
for bottles with both European and American standard crown neck
finish; it is available in 3 sizes: 26 mm (for standard crown neck
finish), 33mm, and 38 mm (for widemouth).
MaxiCrown is a three-piece
cap consisting of a shell (made from semi-soft aluminum), a liner
(made from low density polyethylene), and a ring (made from high
density polyethylene). The design allows an economic utilization
of materials with a minimum waste, thus providing optimal material
costs. (See below)
The Cap Shell.
The shell is punched and scored from pre-printed sheets of aluminum.
Carefully arranged layout enables maximum use of the sheets. Waste
becomes negligible. The shell is manufactured from aluminum in two
thicknesses: 0,21 and 0.24 mm. The 0,21 mm material is giving optimal
sealing performance in Europe, while 0,24 mm is required in tropical
climates. The score lines are designed to give optimal opening.
Sealing to the bottle neck is made with a low density polyethylene
(LDPE) molded liner, on request with scavenger effect added. The
liner is shaped and applied to the cap by using a molding process
which is standard as well for crown cork. The liner in Maxi Crown
has a profile which provides a double sealing effect. It seals both
the outside and inside or top of the bottle neck.
The pull ring is made from high density polyethylene (HDPE). The
utilization of materials is 100 percent. The ring is formed and
jointed to the shell in a high speed molding machine that is especially
designed for MaxiCrown. The strong joint can withstand a pulling
force of at least 8 kp. The max force required to open the cap is
approximately 3 kp. The ring is designed to fit closely to the bottle
Maxi Crown is punched from sheets of aluminum with standard offset
printing. The same method has been used for aluminum screw caps
for a long time. The printing can in principle comprise any number
of colors, but is normally limited to four. The printing on aluminum
allows very detailed décor with high finish.