Aluminum closure sheet introduction

Aluminium closure sheet

Aluminum closure sheet's greatest qualities are drawability and lacquer adhesion, guaranteeing the highest quality printing of drawings and designs. Signi aluminium produces a range of quality alloys and tempers for a wide variety of closure applications, from liquor, spirits and soft drinks to pharmaceutical packaging.
Signi aluminum supplies aluminium closure sheet and coils for the manufacture of bottle closures. Applications range from screw caps for whiskey and other beverage bottles to aluminum closures for wine bottles. Aluminum - the ideal material for the production of bottle closures:

• is light weight
• is easily and economically recycled
• has superior barrier qualities
• has good formability
• offers a bright finish for decoration.

Dimensions
Parameter	Range	Standard	Tolerance
Thickness (mm)	0.18 — 0.25	0.18, 0.20	+0.005/-0.005
Width (mm)	50 — 1250	813, 845, 833.8,835	+0.5, -0
Length (mm)	400 — 1000	655,706	+0.5, -0
Diagonal difference for sheet (mm)	1 max	-	-
Coil sizes (mm)	OD: 1450 max ID: 75,150,300, 508	-	-
Coil density (kg/mm)	3.5 max	-	-
Offer for thickness and width outside the range may be quoted on specific request
Surface	Mill finish, color coated, chromated, varnished
Earing	Typical value: < 2 per cent for >=0.18 mm thickness

Mechanical properties
Alloy (AA)	Temper	UTS (mpa)		% E (min) (at 50 mm gauge length)
Alloy (AA)	Temper	Min	Max	% E (min) (at 50 mm gauge length)
3105	H14	150	200	1
8011	O	8.5	12	15
	H14	125	170	1
	H24	125	160	1

Chemical composition
Alloy (%)	AA 3105	AA 8011
Fe	0.70	0.6-1.0
Si	0.60	0.5-0.9
Mg	0.20- 0.80	0.05
Mn	0.3-0.8	0.20
Cu	0.30	0.10
Zn	0.25	0.10
Ti	0.10	0.08
Cr	0.10	0.05
Each (others)	0.05	0.05
Total (others)	0.15	0.15
Al	Remaining	Remaining
Single number indicates maximum content

Packing

Sheet: Aluminium closure Sheets are placed in wooden boxes on wooden skids with runners along the length of the sheet. They are wrapped in HDPE with hardboard on top and bottom of the stack. Hoop iron strapping runs along the length of the sheets. Silica gel packets are put in the boxes for moisture protection.

Alternatively, they are wrapped in a poly-laminated gunny or polythene, strapped with a hoop iron strap and clip and placed on a wooden pallet. Edge guards are used and the sheets are wrapped with protective thermocol sheets.

Coil: Coil is placed on wooden pallets in either eye-to-sky or eye-to-wall condition, wrapped in HDPE fabric and hardboard, and strapped with hoop iron. Silica gel packets are used for moisture protection.