Что такое алюминиевая фольга медицинского назначения?

В сфере фармацевтической упаковки, алюминиевая фольга медицинского назначения is far more than a simple upgrade from ordinary aluminium foil. It is a functional packaging material developed through precise material selection, meticulous rolling, and special surface treatment, based on the stringent safety and usage requirements of the pharmaceutical industry. As a technician with extensive experience in pharmaceutical aluminum foil production, I firmly believe that understanding the core value of medical grade aluminum foil requires first clarifying its fundamental differences from industrial and food grade aluminum foil—its core mission is to construct a “барьер” that combines barrier protection, safety compatibility, and usability throughout the entire lifecycle of drug storage and transportation.

From a material overview perspective, the substrate of medical grade aluminium foil is mainly composed of aluminum alloys such as 1235 а также 8011. These aluminum materials possess excellent ductility and purity. А 1235 grade aluminum content is no less than 99.35%, and the total content of impurity elements such as iron and silicon is controlled below 0.6%. This low-impurity characteristic prevents chemical reactions with pharmaceuticals. А 8011 оценка, through the addition of trace amounts of manganese, enhances the mechanical strength of the aluminum foil, making it suitable for the cutting and forming requirements of high-speed packaging production lines. Unlike ordinary aluminum foil, which focuses on cost control, the production of Фармацевтическая алюминиевая фольга requires multiple purification processes to ensure that the residual levels of heavy metals (вести, кадмий, Меркурий, мышьяк) in the substrate are all below 0.001%, which is a fundamental prerequisite for ensuring drug safety.

In terms of specification selection, the thickness range of medical grade aluminum foil is not arbitrarily set, but rather deeply bound to the application scenario. Based on years of production and customer adaptation experience, the mainstream thickness of алюминиевая фольга is currently concentrated between 0.018mm and 0.025mm, with 0.020mm-0.022mm being the most common specification. This thickness range ensures ≥99.9% gas barrier properties (oxygen and water vapor permeability ≤0.1cm³/(м² · 24h · 0,1 МПа) and ≤0.1g/(м² · 24 часа) соответственно) while meeting the heat-sealing strength requirements for blister packaging (peel strength after heat sealing ≥1.5N/15mm). For antibiotics and lyophilized preparations requiring long-term storage, we recommend the 0.025mm thicker specification, which increases the puncture strength to ≥3.0N, providing better resistance to external impacts during transportation. For lightweight packaging of small tablets and capsules, the 0.018mm specification can reduce packaging costs and material consumption while maintaining protection.

The quality requirements for medical grade aluminium foil are key to distinguishing its quality and represent the most stringent aspect of our production process. Besides the material purity mentioned earlier, surface quality and heat-sealing compatibility are particularly important. The surface must meet the “three no’s” стандартный: нет проколов, никаких царапин, and no oil stains.

Pinhole control is the core challenge—we use imported high-precision rolling equipment to control the number of pinholes per square meter of aluminum foil to ≤3 (pinhole diameter ≤0.03mm). This indicator is far higher than the ≤10 pinholes/㎡ standard for food grade aluminum foil, because even a tiny pinhole can allow oxygen and water vapor to penetrate, causing drug deterioration.

Regarding the heat-sealing layer, medical grade aluminum foil needs to be coated with a specialized pharmaceutical-grade heat-sealing adhesive. The adhesive layer thickness should be controlled at 2-3 мкм, and it must pass standard compatibility tests to ensure no harmful substances migrate during the heat-sealing process. Одновременно, the heat-sealing temperature range must be adaptable to different packaging equipment, typically controlled between 120-160℃, to ensure a balance between heat-sealing efficiency and sealing performance.

В практических приложениях, the adaptability of medical grade aluminium foil directly determines the feasibility of the packaging solution. В настоящее время, its core applications fall into two categories:

Первый, blister pack caps, combined with substrates such as PVC, ПВДХ, and cold-stamped aluminum, are used for packaging solid dosage forms such as tablets, капсулы, и гранулы. Their excellent barrier properties extend the shelf life of medicines, while also offering good printability, allowing for clear printing of drug information and anti-counterfeiting labels.

второй, composite layers for pharmaceutical bags, combined with materials such as polyester and polyethylene to create infusion bags and powder injection packaging bags. The light-blocking properties of aluminum foil (≥99.5% light blocking rate for wavelengths of 200-800nm) protect photosensitive drugs.

The core competitiveness of алюминиевая фольга медицинского назначения stems from its precise matching with the needs of the pharmaceutical industry; every parameter setting is based on a dual consideration of safety and practicality. As production technicians, we always prioritize drug safety and are guided by customer needs. Through continuous technological iteration and optimization of production processes, we ensure that medical-grade aluminum foil not only serves as a packaging material but also as a “guardian” of drug quality.