What factors should be considered when selecting materials for medical plastic packaging?

Release Date:

2026-01-20

The selection of materials for medical plastic packaging must center on three core objectives: product safety, compatibility with sterilization processes, and stability during distribution, while comprehensively considering the following key factors: Sterilization Process Compatibility Different medical products require different sterilization methods, such as high-temperature steam, ethylene oxide, and gamma irradiation; therefore, the packaging material must be able to withstand the corresponding sterilization conditions. For example, polypropylene (PP) can endure 121°C steam sterilization and is suitable for instruments that undergo steam sterilization; polyester (PET) exhibits excellent radiation resistance and is well-suited for implantable products that are sterilized with gamma rays; polyethylene (PE), on the other hand, is compatible with ethylene oxide sterilization and is commonly used for packaging general consumables. Aseptic Barrier Performance The material must provide outstanding barrier properties to prevent the ingress of external microorganisms, moisture, oxygen, and other contaminants, thereby maintaining the sterility of the product. For instance, polyamide (PA) composite films offer strong barrier performance and are ideal for precision surgical instruments; high-density polyethylene (HDPE) is puncture-resistant and helps prevent package damage and microbial contamination during transportation. Biocompatibility The material must meet medical-grade standards, being non-toxic and non-sensitizing, and must not release harmful substances during sterilization or storage. For example, polyvinyl chloride (PVC) is increasingly being replaced by non-PVC materials in applications where it comes into direct contact with pharmaceutical solutions, such as infusion bags, due to the risk of plasticizer migration. Product Suitability The material must match the form and characteristics of the packaged product: liquid medications require chemically resistant materials; sharp instruments need materials with high puncture resistance; and implantable devices demand long-term stable, high-barrier packaging. Distribution and Storage Requirements Considerations include the mechanical strength required for warehousing stacking and logistics transportation, as well as compatibility with the product’s storage environment—for example, reagents stored at low temperatures should be packaged in materials that are cold-resistant and less prone to embrittlement. Compliance and Cost-Effectiveness The material must comply with international standards such as ISO 11607 and the regulatory requirements of various countries, while balancing performance with cost to achieve the most cost-effective material solution.

The selection of materials for medical plastic packaging must center on three core objectives—product safety, compatibility with sterilization processes, and stability during distribution—and comprehensively consider the following key factors:
Sterilization Process Compatibility
Different medical devices require different sterilization methods, such as high-temperature steam, ethylene oxide, and gamma irradiation, and the materials must be able to withstand the corresponding sterilization conditions. For example, polypropylene (PP) is resistant to 121°C steam sterilization and is suitable for instruments that are sterilized by steam; polyester (PET) exhibits excellent radiation resistance and is well suited for implantable products that are sterilized with gamma rays; while polyethylene (PE) is compatible with ethylene oxide sterilization and is commonly used for packaging general consumables.
Sterile barrier performance
The material must exhibit excellent barrier properties to prevent the ingress of external microorganisms, moisture, oxygen, and other contaminants, thereby maintaining the sterility of the product. For example, polyamide (PA) composite films offer strong barrier performance and are well suited for precision surgical instruments, while high-density polyethylene (HDPE) is highly puncture-resistant, helping to prevent package damage and microbial contamination during transportation.
Biosafety
They must meet medical-grade standards, be non-toxic and non-sensitizing, and not release harmful substances during sterilization or storage. For example, polyvinyl chloride (PVC), due to the risk of plasticizer migration, is increasingly being replaced by non-PVC materials in applications where the material comes into direct contact with pharmaceutical solutions, such as infusion bags.
Product Compatibility
The form and characteristics of the packaged product must be matched: liquid pharmaceuticals require chemically resistant materials; sharp instruments necessitate materials with high puncture resistance; and implantable devices demand long-term stable, high-barrier packaging.
Distribution and Storage Requirements
Consider the requirements for mechanical strength in warehouse stacking and logistics transportation, while also ensuring compatibility with the product’s storage environment; for example, reagents intended for low-temperature storage should be packaged in materials that are resistant to low temperatures and less prone to embrittlement and cracking.
Compliance and Cost-effectiveness
It is necessary to comply with international standards such as ISO 11607 and the regulatory requirements of various countries, while balancing cost and performance to select the material solution that offers the best value.

Return to list