8011 aluminum foil and 8021 aluminum foil are both popular types of aluminum foils used for various applications, but they have some differences in their chemical composition and properties. Here’s a comparison based on key factors:

Thành phần hợp kim:

8011 Giấy nhôm: It is a typical alloy of the 8xxx series and contains aluminum as its primary element with small amounts of other elements like iron, silic, và đồng.
8021 Giấy nhôm: It also belongs to the 8xxx series and is an alloy that consists of aluminum as the primary element, with additional elements such as iron, silic, and other trace elements.

Ứng dụng:

8011 Giấy nhôm: This type of foil is commonly used in various packaging applications, such as for food packaging, bao bì dược phẩm, and household foil.
8021 Giấy nhôm: It is specifically used for blister packaging in the pharmaceutical industry due to its excellent barrier properties against moisture, oxygen, and light.

Tính chất cơ học:

8011 Giấy nhôm: It has good mechanical properties, making it suitable for general-purpose packaging requirements.
8021 Giấy nhôm: This foil has higher tensile strength and elongation compared to 8011 foil, which is crucial for blister packaging that requires easy formation and sealing.

Barrier Properties:

8011 Giấy nhôm: It provides a moderate barrier to moisture, light, and gases, making it suitable for standard packaging needs.
8021 Giấy nhôm: Due to its enhanced barrier properties, it is an excellent choice for pharmaceutical blister packaging, protecting drugs from external elements.

Softness:

8011 Giấy nhôm: It has a relatively softer structure, making it easy to bend and fold for various packaging applications.
8021 Giấy nhôm: This foil is slightly harder than 8011, but it remains pliable enough to be formed into blister packs without compromising the barrier properties.

Trị giá:

8011 Giấy nhôm: It is generally more cost-effective compared to 8021 foil, making it preferable for cost-sensitive applications like household foil.
8021 Giấy nhôm: Being specialized for pharmaceutical blister packaging, it may be more expensive than 8011 foil due to its unique properties.