Haomei Aluminum supplies aluminum coil and slit strip for bottle-cap and closure manufacturing. The material can be specified by alloy, temper, thickness, strip width, coil dimensions and surface condition to suit the customer's forming equipment and closure design.
An aluminum closure coil strip is a thin-gauge aluminum alloy supplied as a continuous coil or narrower slit strip. Unlike general-purpose aluminum strip, closure material needs to match the cap design, forming sequence and surface treatment. Gauge variation, strip flatness and edge condition can all affect how consistently the material runs through a cap-making line.
- Product Form
- Aluminum coil, slit coil and strip
- Alloy Options
- 8011, 3105 and other suitable grades
- Temper
- Selected according to forming and strength requirements
- Thickness
- 0.15–0.50 mm, subject to requirements
- Strip Width
- Specified according to cap dimensions and tooling
- Surface
- Mill finish, lubricated, coated or printed as agreed
For a broader overview of available material forms, see Aluminum Closure Stock for Bottle Caps .
Specifications for Aluminum Closure Coil Strip
Haomei Aluminum supplies aluminum closure coil strip in selected alloys, tempers and slit widths for bottle cap and closure production. Thickness, surface finish, edge condition and coil dimensions can be specified according to the closure design and processing requirements.
| Item | Specifications |
| Alloy | 8011 and 3105; 1050, 1060, 3004, 3104, 5182 and 5052 are also available for suitable applications, subject to product requirements. |
| Temper | Selected according to closure design, forming requirements and required mechanical properties. |
| Thickness | 0.15–0.50 mm; customized gauges and tolerances can be discussed according to production requirements. |
| Strip Width | Custom slit widths with agreed dimensional tolerances to suit tooling and coil-feeding equipment. |
| Surface Finish | Mill finish, degreased, lubricated, coated or printed, subject to the selected specification. |
| Edge Quality | Slit-edge condition, allowable burr limits and edge-damage requirements to be agreed before production. |
| Coil Configuration | Customizable inside diameter (ID), outside diameter (OD) and coil weight according to handling and processing requirements. |
| Inspection | Dimensional checks, mechanical testing and surface inspection according to agreed quality requirements. |
| Packaging | Export packaging arranged according to coil dimensions, handling requirements and shipping conditions. |
| Minimum Order Quantity | 5 tons. |
Slit Width and Edge Quality Control for Aluminum Closure Coil Strip
Slit Width and Dimensional Control
At Haomei Aluminum, slit width and dimensional tolerances are controlled against the agreed order specifications. Before slitting, we confirm the required strip width, material thickness and tolerance limits to ensure the aluminum closure coil strip matches the customer's production requirements. Width consistency is checked during processing, helping reduce dimensional variation when the strip is fed into cap stamping and closure-forming equipment.
Burr Control and Slit Edge Quality
Haomei Aluminum pays close attention to burr height, edge cracks and cut-edge uniformity during aluminum coil slitting. Excessive burrs or damaged edges can affect strip handling, die performance and subsequent forming operations. We monitor slit-edge condition and address visible cutting defects to keep the finished aluminum closure strip within the agreed quality requirements. Specific burr limits can be confirmed according to the material thickness, strip width and application.
Surface Finish for Aluminum Closure Coil Strip
We supply aluminum closure coil strip in mill-finish, lubricated, coated and printed conditions. We work with you to select a surface specification that matches your cap-forming process, finishing line and closure design.
Mill Finish
Our mill-finish strip is supplied without decorative coating or printing, making it a practical choice for manufacturers with in-house cleaning, lacquering or printing facilities. Surface appearance and finish requirements can be confirmed before ordering.
Lubricated Surface
We offer lubricated strip to help reduce friction during cap forming. The lubricant type and application level are selected according to your processing requirements, with attention to compatibility with subsequent cleaning, coating and printing operations.
Coated or Printed Strip
For closures requiring a protective finish or branded appearance, we offer coated and printed strip to agreed specifications. Available finishes may include clear lacquer, colored coatings and custom printing. We review coating adhesion, flexibility and artwork requirements with you to ensure the selected finish is suitable for the intended forming process.
Get a Quote for Your Aluminum Closure Strip
Need mill-finish, lubricated, coated or printed strip? Send us your closure specifications, surface requirements and artwork, if available. We’ll review your requirements and recommend a suitable option for your production process.
Request a QuoteApplications of Aluminum Closure Coil Strip
Aluminum closure coil strip is used to manufacture bottle caps and vial-seal components. Material selection depends on the closure design, forming process and finish required. For continuous-feed production, strip width, thickness tolerance and coil dimensions also need to suit the equipment.
ROPP Caps
Roll-on pilfer-proof caps are used on wine, spirits and other beverage bottles. When selecting aluminum for ROPP caps, match the alloy, temper and thickness to the cap-forming process and tamper-evident band design. The formed cap must also accommodate thread rolling during application to the bottle.
Wine Screw Caps
Wine screw caps require a balance of formability and surface quality, particularly for long-skirt designs and decorated finishes. The specification for aluminum for wine screw caps should account for cap depth, printing or coating requirements and compatibility with the chosen liner system.
Pharmaceutical Vial Seals
Aluminum strip can be formed into the metal components of vial seals, including selected flip-off and crimp-seal designs. For applications using 1060 aluminum for vial seals, confirm the temper, thickness and surface condition against the component drawing. Cleanliness, coating and documentation requirements should be agreed upon for the intended pharmaceutical packaging application.
If your production line uses flat stock instead of coil-fed strip, explore aluminum closure sheets. Choose the supply format that fits your blanking layout, feeding equipment and material-handling setup.
Aluminum Closure Coil Processing Equipment
At Haomei Aluminum, aluminum coil and strip processing involves several stages, including slitting, coating, material handling and recoiling. The equipment shown here illustrates how aluminum closure stock is processed and prepared for applications such as beverage caps, bottle closures and easy-open ends.
Quality Control for Aluminum Closure Coil and Strip
At Haomei Aluminum, we check aluminum closure coil and strip against the specifications confirmed for each order. Inspection covers material identification, slit-edge quality, surface condition and, where applicable, coating requirements for cap production.
Material and Dimension Checks
Before processing, we verify the alloy and temper records, measure thickness and width, and check coil dimensions against the order requirements. We also inspect the exposed surface and packaging for visible damage and confirm that coil labels match the material records. Measuring methods and sampling frequency follow the agreed inspection plan.
Slit Width, Edge Quality and Winding
After slitting, we check strip width, edge burrs, edge damage, camber and edge wave. Winding checks cover loose wraps, uneven coil edges and other visible irregularities that may affect handling or feeding on cap-making equipment. Acceptance limits follow the tolerances agreed for the order.
Surface and Coating Inspection
We inspect the surface for scratches, dents, stains and other visible defects. For coated closure stock, checks also cover the specified coating side, color and finish. Adhesion and any additional coating tests are carried out where required, using methods suited to the coating system and the intended closure application.
FAQ – Aluminum Closure Coil Strip
What is aluminum closure coil strip?
Aluminum closure coil strip is rolled aluminum supplied in coil or narrow-strip form for conversion into bottle caps, closures and selected sealing components. The appropriate specification depends on the application, alloy, temper and downstream forming equipment.
What is the difference between aluminum coil and slit strip?
Aluminum coil refers to the wound form of the material, while slit aluminum strip is produced by cutting a wider master coil into narrower widths. When ordering from Haomei Aluminum, specify whether you require master coils or slit coils with defined strip widths.
Which alloys are used for bottle-cap aluminum coil strip?
Alloys 8011 and 3105 are options for selected bottle-cap and closure applications. The suitable alloy and temper depend on the closure design, required mechanical properties, forming process, surface treatment and applicable material specification.
What thicknesses and slit widths are available?
Available thicknesses and slit widths depend on the selected alloy, temper, application and production requirements. Specify the nominal thickness, target strip width and allowable tolerances so Haomei Aluminum can assess the required material configuration.
What tolerances should be specified for slit aluminum strip?
Specify thickness and width tolerances, together with requirements for edge burrs, camber, edge condition and winding quality. Acceptable tolerances should be confirmed against the alloy, thickness, strip width, applicable standards and production capabilities.
Can aluminum closure coil strip be supplied with coating or printing?
Coated or printed aluminum coil strip may be available depending on the required finish and processing route. Confirm the coating system, treated side, printing requirements and compatibility with subsequent forming operations before ordering.
What information is needed for an aluminum closure coil strip quotation?
Provide the alloy, temper, thickness, slit width, coil inside and outside diameters, target coil weight, order quantity, surface treatment, dimensional tolerances and export packaging requirements. Drawings or an existing material specification can also help Haomei Aluminum evaluate the requirements for your application.