Medical injection moulding places significantly stricter demands on material, process, and documentation than industrial injection moulding. Deviations that are acceptable in other sectors can lead to product recalls or patient risk in medical applications. Medical injection moulding requires biocompatible materials that comply with standards such as ISO 10993 and, in many cases, USP Class VI. The manufacturing process must be traceable, validated, and documented in accordance with ISO 13485, the quality management standard for medical devices. Dimensional accuracy, surface quality, and material selection are directly determined by the end application: diagnostic, surgical, or implantable.<\/p>\n
Medical injection moulding differs from standard injection moulding in the regulatory requirements, material requirements, and quality assurance processes applied to each part produced.<\/p>\n
In standard industrial injection moulding<\/u><\/a> Components are assessed for dimensional accuracy, surface finish, and mechanical properties. For medical injection moulding, additional requirements apply:<\/p>\n These requirements apply regardless of whether the component is a single-use disposable product or a reusable diagnostic instrument.<\/p>\n Material selection in medical injection moulding is determined by the application, type of bodily contact, and sterilisation method. Not solely by mechanical or processing properties.<\/p>\n The materials are classified based on the duration and nature of bodily contact:<\/p>\n Medical injection moulding places specific demands on the production environment's setup, process control, and quality control. Deviation from validated process parameters is not permitted without re-certification.<\/p>\n Depending on the risk class of the final product, production takes place in an ISO 7 or ISO 8 cleanroom (formerly Class 10,000 and 100,000). This limits particulate contamination and microbiological contamination of the product.<\/p>\n The injection moulding process is fully validated before series production begins. The IQ (Installation Qualification) verifies the machine configuration. The OQ (Operational Qualification) validates the process parameters. The PQ (Performance Qualification) proves reproducible product quality under production conditions.<\/p>\n A First Article Inspection is carried out with each new mould or after modifications: a full dimensional check of the first production piece against the 2D drawing or 3D model.<\/p>\n Critical measurement characteristics are monitored via SPC. Process deviations are detected before they lead to non-conforming parts.<\/p>\n Every manufactured batch can be traced back to the raw material batch number, the machine, the mould and the production date. This is required for DHF (Device History File) and DHR (Device History Record) in accordance with 21 CFR Part 820 (FDA) and MDR 2017\/745 (Europe).<\/p>\n Medical raw materials are stored separately from industrial materials. In many cases, dedicated moulds and dedicated machines are used to avoid cross-contamination and wear risks.<\/p>\n Every change in material, mould, machine, or process parameter goes through a formal change control process. Undocumented changes are a deviation finding during regulatory inspections.<\/p>\n The production of medical plastic parts via injection moulding falls under a combination of international standards, European regulations and national legislation, depending on the risk class of the final product.<\/p>\n The most relevant frameworks:<\/p>\n The risk class classification determines the depth of required documentation and the type of conformity assessment procedure. Class I products (low risk) have fewer documentation requirements than Class IIa, IIb, or III products.<\/p>\n In medical injection moulding, conformity begins at the mould design stage. A mould that does not meet the requirements for cleanability, pressure and temperature distribution, or material control will lead to irreproducible production.<\/strong><\/p>\n\n
Welke materialen worden gebruikt bij medisch spuitgieten?<\/h2>\n
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Standard medical thermoplasts<\/h3>\n
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Advanced medical polymers<\/h3>\n
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Critical material properties<\/h3>\n
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7 process requirements that apply to medical injection moulding<\/h2>\n
1. Cleanroom or controlled manufacturing environment<\/h3>\n
2. Process Validation via IQ\/OQ\/PQ<\/h3>\n
3. First Article Inspection (FAI)<\/h3>\n
4. Statistical Process Control (SPC)<\/h3>\n
5. Traceability to raw material level<\/h3>\n
6. Material separation and dedicated tooling<\/h3>\n
7. Wijzigingsbeheersing (Change Control)<\/h3>\n
What standards and regulations apply?<\/h2>\n
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Mould and product development for medical applications<\/h2>\n