8011 Heat Sealing Aluminium Foil For PP/PS Yogurt Cup Lid

8011 aluminum foil is suitable for making heat sealing PP/PS yogurt cup lids. 8011 aluminum foil is typically in the O temper (annealed state), possessing good ductility and flexibility, making it easy to process and shape. It exhibits excellent heat sealing performance, bonding tightly to heat sealing materials such as PP and PS at high temperatures of 150-200℃ to form an airtight seal and prevent leakage. Simultaneously, 8011 aluminum foil also possesses good barrier properties, effectively blocking oxygen, moisture, and ultraviolet rays, preventing yogurt spoilage. It also meets national food safety standards, is non-toxic and odorless, and does not chemically react with the contents. These characteristics make it ideal for heat sealing PP/PS yogurt cup lids.

Core performance advantages of 8011 aluminum foil for for PP/PS yogurt cup lid:

– Excellent heat sealing performance

8011 aluminum foil can bond tightly to plastic materials such as PP (polypropylene) and PS (polystyrene) at high temperatures, forming a high-strength sealing layer. Its heat-sealing strength is typically controlled within the range of 6–15 N/15mm, ensuring both reliable sealing and ease of opening for consumers.

Aluminum foil’s high-temperature resistance (withstanding 121℃–125℃ cooking) is highly compatible with the heat-sealing process, preventing deformation or leakage at the seal due to high temperatures.

– Excellent barrier properties:

Aluminum foil offers near 100% barrier properties against oxygen and moisture, effectively preventing spoilage of yogurt due to oxidation and moisture absorption, thus extending its shelf life. Compared to pure plastic packaging, aluminum foil composite films offer superior sealing, resisting external contamination and ensuring food safety.

– Stable mechanical properties:

8011 aluminum foil possesses high puncture and tear resistance, withstanding straw punctures and impacts during transportation, preventing packaging damage. Its smooth, oil-free surface facilitates lamination with plastic layers, reducing sealing defects.

– Safety and environmental friendliness:

8011 aluminum foil is a food-grade material, non-toxic and odorless, meeting national environmental and food safety standards. It is recyclable, reducing the environmental impact of packaging waste.

Process compatibility of 8011 aluminum foil with PP/PS yogurt cups:

– Material compatibility:

The heat-sealing layer of 8011 aluminum foil (such as PE, EVA) has similar chemical properties to PP/PS materials, resulting in strong intermolecular forces during heat fusion bonding and a secure seal. The interfacial bonding between the aluminum foil and the plastic can be further enhanced by applying a special adhesive or using a co-extrusion process.

– Heat sealing parameter controllability:

Heat sealing temperature: 8011 aluminum foil has a wide applicable temperature range (typically 120℃–180℃), which can match the heat distortion temperature of PP/PS, preventing over-melting of the plastic or oxidation of the aluminum foil.

Heat sealing time: Sealing can be completed in as little as 0.5 seconds, meeting the needs of high-speed filling lines.

Pressure adjustment: The seal thickness and flatness can be precisely controlled via a pneumatic or electric pressurization system (0.1–0.8 MPa).

– Composite structure flexibility

8011 aluminum foil can be combined with PP/PS through dry lamination, extrusion lamination, or co-extrusion processes to form multilayer films, creating structures such as “PET/AL/PE,” balancing barrier properties, heat-sealing properties, and printability.

The composite film thickness is typically between 0.08–0.15 mm, meeting the lightweight requirements of yogurt cup foil lids.

Application cases of aluminium foil for PP/PS yogurt cup lid:

8011 aluminum foil is widely used in yogurt cup lids from major brands, covering room-temperature yogurt, refrigerated yogurt, and fermented dairy products. In addition to yogurt, this material is also used in food packaging requiring high barrier properties, such as juice and milk powder.

Performance test data:

Heat sealing strength: Under conditions of 130℃, 0.5 seconds, and 0.3 MPa, the heat-sealing strength of the 8011 aluminum foil and PP composite film can reach 12 N/15 mm, far exceeding the industry standard (≥6 N/15 mm).

Barrier properties: Oxygen permeability <0.1 cm³/(m²·24h·0.1MPa), moisture permeability <0.5 g/(m²·24h), ensuring a shelf life of over 6 months at room temperature for yogurt.

Puncture resistance: When punctured by a 3mm diameter straw with a force of 50 N, the aluminum foil layer shows no breakage, and the overall strength retention rate of the composite film is >90%.

8011 aluminum foil, with its excellent heat-sealing properties, barrier properties, mechanical properties, and environmental friendliness, is an ideal choice for PP/PS yogurt cup lids. Its high compatibility with plastic materials allows it to meet various packaging needs through composite processes, and its reliability has been proven in practical applications. For yogurt brands seeking high quality, long shelf life, and environmental friendliness, 8011 aluminum foil is one of the best solutions currently available on the market.