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 revolve around four core dimensions: safety, protection, compatibility, and compliance. This selection should be made in comprehensive consideration of the characteristics of the medical product and its intended use scenarios, with the following specific factors to be taken into account: Biocompatibility The material must be non-toxic, non-sensitizing, and free from leachable harmful substances, and it must not undergo any chemical reactions with the drugs or devices contained within the package. It must pass biocompatibility tests such as ISO 10993 to prevent inflammation or allergic reactions upon contact with the human body. Barrier Properties Depending on the requirements of the contents, select materials with high barrier properties against oxygen, water vapor, microorganisms, ultraviolet light, and other factors. For example, lyophilized drug packaging requires materials with high moisture-barrier properties to prevent moisture absorption and subsequent loss of efficacy, while sterile device packaging requires antimicrobial materials to maintain a sterile environment. Sterilization Compatibility The material must be resistant to commonly used medical sterilization methods, such as ethylene oxide sterilization, gamma-ray irradiation, and steam sterilization. After sterilization, it must not deform or degrade, nor release toxic substances. For instance, polypropylene (PP) is compatible with steam sterilization, whereas polyester (PET) is suitable for irradiation sterilization. Mechanical Properties The material must possess sufficient tensile strength, tear resistance, and impact resistance to meet the demands of stacking and handling during transportation and storage, thereby preventing package damage that could lead to contamination of the contents. Process Compatibility The material should be easy to process and form (e.g., by blow molding or heat sealing), with heat-seal strength meeting the required standards to ensure a tight, leak-proof seal. At the same time, it should support printing, enabling clear labeling of product information, sterilization marks, expiration dates, and other traceability-related content. Compliance The material must comply with regulations issued by the National Medical Products Administration as well as international standards such as ISO 11607 “Packaging for terminally sterilized medical devices.” It must also have complete certification and full traceability. Cost and Environmental Considerations While meeting performance requirements, cost control should also be taken into account; in certain applications, recyclability or biodegradability should be considered to comply with medical waste disposal regulations.

The selection of materials for medical plastic packaging must center on four core dimensions: safety, protection, compatibility, and compliance, while taking into account the specific characteristics of the medical product and its intended use. The specific factors are as follows:
Biocompatibility
The materials must be non-toxic, non-sensitizing, and free from leachable harmful substances, and must not undergo chemical reactions with the drugs or medical devices contained in the packaging. They must also pass biocompatibility tests such as ISO 10993 to prevent inflammation or allergic reactions upon contact with the human body.
Barrier performance
Select materials with high barrier properties against oxygen, water vapor, microorganisms, ultraviolet radiation, and other factors based on the requirements of the packaged contents. For example, lyophilized pharmaceutical packaging requires materials with high moisture-barrier performance to prevent moisture absorption and subsequent loss of efficacy, while sterile medical-device packaging necessitates antimicrobial materials to maintain a sterile environment.
Sterilization Compatibility
The materials must be compatible with commonly used medical sterilization methods, such as ethylene oxide sterilization, gamma-ray irradiation, and steam sterilization. After sterilization, they should exhibit no deformation or degradation and must not release toxic substances. For example, polypropylene (PP) is resistant to steam sterilization, while polyester (PET) is suitable for radiation sterilization.
Mechanical Properties
It possesses sufficient tensile strength, tear resistance, and impact resistance to meet the stacking and handling requirements during transportation and storage, thereby preventing package damage that could lead to contamination of the contents.
Process adaptability
It should be easy to process and form (e.g., by blow molding or heat sealing), with heat-seal strength meeting specified standards to ensure a tight, leak-proof seal. At the same time, it must be suitable for printing, enabling clear labeling of product information, sterilization marks, expiration dates, and other traceability details.
Compliance
Compliant with the regulations of the National Medical Products Administration and international standards such as ISO 11607, “Packaging for Terminally Sterilized Medical Devices,” the materials must be accompanied by complete qualification documentation and full traceability.
Cost and Environmental Friendliness
While meeting performance requirements, cost control must also be taken into account; in certain applications, recyclability or biodegradability should be considered to comply with medical waste disposal regulations.

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