AA8011 H14 Aluminium Sheet for ROPP Caps
AA8011 H14 Aluminium Sheet for bottle closure is rolled to very fine tolerances to yield more closure per tonne of stock and to allow uninterrupted operation of high-speed, multiple-cavity presses. Such closure sheet its strength, high formability, low Earring and printable surfaces make it ideal for pilfer-proof caps and vial seals.
The broad categories of ROPP closures can be defined as Plain Printed Caps, Top Embossed Caps, Knurl Embossed Chamfered Caps, Side Embossed Chamfered Caps, Deep Drawn Caps, Extra Deep Drawn Side dry offset printed caps etc.
| Aluminum Cap sheet 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 |
| Earing |
| Typical value: < 2 per cent for > =0.18 mm thickness |
| Aluminum Cap Sheet Mechanical properties |
| Alloy (AA) |
Temper |
UTS (mpa) |
% E (min)
(at 50 mm gauge length) |
| Min |
Max |
| 3105 |
H14 |
150 |
200 |
1 |
| 8011 |
O |
8.5 |
12 |
15 |
| H14 |
125 |
170 |
1 |
| H24 |
125 |
160 |
1 |
| Aluminum Cap Sheet 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 |
| Aluminum Cap Sheet Packing |
| Sheet: 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. |
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