One of the key components of packaging—especially in the beverage and pharmaceutical industries—is the sealing system. Tamper-evident ROPP (Roll-On Pilfer-Proof) caps play a crucial role in maintaining product integrity, safety, and freshness.

8011 and 3105 Aluminum Alloys for ROPP Caps

These ROPP caps are made from aluminum to ensure optimal drawability and paint adhesion. The most commonly used alloy for ROPP caps is 8011 aluminum, known for its good formability, high earing ratio, and excellent flatness—making it especially suitable for deep-drawing long caps used in wine bottles and other beverage containers.

Compared with 8011 deep-drawn aluminum sheet, 3105 aluminum closure sheet is suitable for bottle cap applications that require higher pressure resistance, such as spirits, anti-counterfeiting screw caps and carbonated beverage bottle caps, due to its higher strength and corrosion resistance.

Why Use Aluminum Sheets for ROPP Caps?

Aluminum is the preferred material for ROPP caps due to its inherent properties tailored for packaging:

Excellent barrier properties protect contents from light, moisture, and other quality-degrading external factors.

Lightweight yet strong, aluminum is ideal for efficient transport and handling.

Product Specifications

Advantages of Aluminum Sheets for ROPP Caps

• Tamper-Evident: Difficult to remove without visible damage, ensuring product security.

• Secure Seal: Excellent sealing performance keeps contents fresh—ideal for long-shelf-life items like drinks and medicines.

• Durability: Made of robust aluminum, reducing the risk of leaks and contamination.

• Aesthetic Appeal: Fully customizable designs, colors, and finishes enhance shelf presence.

• Recyclability: 100% recyclable, aluminum supports sustainability and appeals to eco-conscious consumers.

• Versatility: Compatible with a wide range of bottle types and sizes—applicable across food, pharma, and cosmetics industries.

• Cost-Effectiveness: While initial costs may be higher, durability and tamper-proof benefits reduce losses, offering a premium packaging solution.

Thickness Selection for Deep-Drawing ROPP Caps

When choosing deep-drawn aluminum sheets for ROPP bottle caps, you need to choose the appropriate specifications and thickness according to actual needs. Generally speaking, the thickness of aluminum sheets for bottle caps is between 0.15 and 0.27 mm, and the width is between 330 and 1000 mm.

Pay attention to the quality and performance of the aluminum sheet to ensure that it can meet the requirements of long-term use. The thickness, quality and performance of aluminum sheets for ROPP bottle caps are very important factors when manufacturing bottle caps.

As a professional aluminum alloy bottle cap manufacturer, MC Aluminum produces 8011 aluminum foil caps, 3105 aluminum closures, 1070/1060 aluminum strips, 5052 can caps, 5182 pull rings and other products for customers to choose from. The surface of the product is clean and smooth without black silk, marks, burrs, etc. The production capacity is huge, samples can be provided, and it is exported to many countries and regions overseas. The price is cheap, so you can order with confidence.