1235-O Feuille d'aluminium pour emballage flexible

1235 O aluminum foil belongs to the 1000-series industrial pure aluminum category, with an aluminum content of ≥99.35%. Following a full recrystallization annealing process, it exhibits excellent plasticity and a high-quality, surface lisse, making it one of the most widely used barrier substrates for flexible composite films. Haomei Aluminum optimizes its production parameters specifically to meet the requirements of the flexible packaging industry—including lamination, impression, and bag-making processes. Haomei 1235-o flexible packaging aluminum foil are utilized across various sectors, comme la nourriture, médicaments, and personal care/household chemicals, and are consistently supplied to flexible packaging manufacturers in over 30 pays du monde entier.

Manufactured from high-purity aluminum with strictly controlled impurity levels, 1235 feuille d'aluminium d'emballage souple meet all technical requirements for flexible packaging lamination:

– Alloy/Temper: 1235-la (fully annealed/soft temper); total Si+Fe content ≤ 0.65%; individual impurities (such as Cu, mn, etc.) ≤ 0.05%.

– Thickness Range: 6μm–50μm (common specifications for flexible packaging include 7μm, 9um, 12um, and 15μm), with a thickness tolerance controlled within ±2%.

– Width Range: 100mm–1650mm; customizable based on the roller width of the client’s laminating or slitting machinery (standard stock widths: 1000mm, 1250mm).

– Coil Specifications: Maximum coil weight of 2.5 metric tons; standard core inner diameters of 76mm or 152mm available; compatible with high-speed, continuous lamination production lines.

– Compliance Standards: Meets international standards such as ASTM B479 and EN 546; food-grade variants are certified under FDA 21 CFR and EU Regulation 1935/2004.

Key Performance Advantages for Flexible Packaging

1. High-Purity Surface Ensures Superior Lamination Adhesion

le 1235 alloy features low impurity content, resulting in a clean, uniform surface after annealing—free from pitting or color variations caused by alloy precipitates. Through our low-residual-oil rolling process, the surface residual oil content is kept at ≤ 3mg/m², with a stable wetting tension of 34–38 mN/m. This ensures excellent bonding strength with polyurethane or acrylate-based adhesives, achieving a peel strength of ≥ 2.0 N/15mm after lamination. While assisting a food packaging client in Southeast Asia with production line commissioning, we encountered an issue with localized delamination following the lamination process. Root-cause analysis revealed that fluctuations in residual surface oil were to blame. By optimizing the rolling oil filtration cycle and the temperature in the drying section, we narrowed the residual oil variance to within ±0.5 mg/m², resulting in a stable lamination yield of over 98.5% for the client.

2. Reliable Barrier Performance Through Minimal Pinholes

Our aluminum foil features a dense structure that provides a 100% barrier against light and gases. Through a three-stage ceramic filtration and in-line degassing process, we ensure high material purity, achieving a pinhole count of ≤20/m² for 9μm foil and ≤5/m² for foil 12μm or thicker. The finished product offers a water vapor transmission rate (WVTR) of ≤0.3 g/(m² · 24h) and an oxygen transmission rate (OTR) of ≤0.5 cm³/(m² · 24h · 0,1 MPa). When laminated, it extends the shelf life of contents by 3–10 times, making it ideal for long-duration cross-border logistics and storage.

3. Excellent Formability for Diverse Processing Methods

In the O-temper (entièrement recuit), la 8021 aluminum foil exhibits a tensile strength of 60–90 MPa and an elongation at break of ≥20%. Its soft, pliable nature ensures a tight fit and prevents cracking or spring-back during processes such as bag making, twisting, or lidding/stamping. For candy twist-wrapping, it maintains a secure twist without springing back or unraveling, while offering a high-gloss finish. When used for lidding on uniquely shaped containers, it ensures clean-cut edges and a broad heat-sealing temperature range, making it well-suited for high-speed filling lines.

Mainstream Flexible Packaging Applications:

– Emballage alimentaire: 7–12μm aluminum-plastic composite pouches for snacks, café, powdered milk, and seasonings; provides protection against light, humidité, and loss of aroma.

– Emballage pharmaceutique: 9–20μm aluminum-plastic pouches for medicinal granules, ointments, and medical devices; offers a barrier against moisture and oxidation.

– Personal Care & Household Product Packaging: 12–20μm aluminum-plastic pouches for facial masks, hair conditioners, and skincare products; resistant to corrosion from contents and effective at preserving the activity of active ingredients.

– Lidding Films: 15–30μm heat-sealable lidding films for yogurt, gelée, and sauces; designed for easy, residue-free peeling with consistent seal strength.

Haomei Aluminum operate a dedicated production line for 1235 aluminum foil with an annual capacity of 20,000 tonnes. Standard specifications can be delivered within 15–20 days; we also support small-batch sampling and customized parameter adjustments. Products intended for export are packaged using a five-layer vacuum, moisture-proof system, ensuring they are well-suited for long-distance ocean transport and fully protected against oxidation and moisture. Please contact our technical sales team to request detailed technical specifications or free samples.