Cleanroom Injection Moulding

Cleanroom injection moulding is the manufacture of plastic or silicone components in a controlled environment where airborne particles, temperature, humidity and pressure are tightly regulated. Unlike conventional production, cleanroom environments are classified according to ISO 14644-1, defining the maximum allowable particle concentration in the air.

three members of staff in Medical solutions Cleanroom Manufacturing at Rosti

This level of control is essential for medical, diagnostic and pharmaceutical products where contamination can compromise safety, performance or compliance.

Rosti operates ISO Class 7 and ISO Class 8 cleanrooms and applies cleanroom principles throughout tooling, moulding, handling and assembly.

Our Cleanroom Capabilities

Cleanroom injection moulding is the manufacture of plastic or silicone components in a controlled environment where airborne particles, temperature, humidity and pressure are tightly regulated. Unlike conventional production, cleanroom environments are classified according to ISO 14644-1, defining the maximum allowable particle concentration in the air.

This level of control is essential for medical, diagnostic and pharmaceutical products where contamination can compromise safety, performance or compliance.

For a deeper technical explanation, see our in-depth article:

What is Clean Room Injection Moulding?

Cleanroom staff in white checking gear.
A map of the Cleanrooms within Rosti Group
The Global map of Rosti’s Cleanroom Sites.

In Poland, Rosti operates ISO Class 7 and Class 8 cleanrooms, including a recently expanded 360 m² Class 8 facility. In China, a new 500 m² Class 8 cleanroom includes a dedicated 300 m² precision moulding area. In the United States, new ISO Class 8 cleanrooms are being established in Wisconsin and Germantown, with over 3,000 square feet under construction to support medical and life sciences production, alongside additional Class 8 capacity in Utah. Rosti also maintains cleanroom manufacturing capability in Turkey.


This global network allows customers to align production with market requirements while maintaining consistent quality and compliance standards.

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Regulatory Compliance and Validation

Rosti’s cleanroom manufacturing operates within a robust regulatory framework designed for medical and regulated industries. Our medical manufacturing facilities are ISO 13485 certified, and our cleanrooms are certified in accordance with ISO 14644-1 for air cleanliness. We support and collaborate with our customer’s classification processes.

Two staff covered and working in Cleanroom 8

Why customers choose Rosti

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  • Global cleanroom manufacturing footprint with equal standards across multiple sites
  • Integrated tooling, moulding and assembly 
  • Full automation assembly or packaging capabilities
  • Regulatory support 
  • Regional production and dual sourcing options
  • Technical supports from design stage
  • Big enough to cope, small enough to care

Case studies and posts within Cleanroom production

person in white medical suit

Tailored Manufacturing at Global Scale: A New Standard for Medical and Pharmaceutical Production

In the medical and pharmaceutical sectors, manufacturing partners are expected to deliver far more than production capacity alone. Today’s customers require flexibility, regulatory consistency, scalability, and the confidence that their…

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Expanding global Cleanroom capabilities

Rosti is making significant investments in medical plastic injection moulding and cleanroom production capabilities across Europe, Asia, and North America. The medical device industry is evolving rapidly, with manufacturers under…

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Producing over 50 million nutritional feeding set components through injection moulding each year

Nutritional Feeding sets are essential in modern healthcare, supporting the safe and efficient delivery of fluids, medicines, and nutrients to patients. These devices consist of several precisely engineered components, all…

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medical production staff looking at machine

Rosti North America Expands Medical Manufacturing Capabilities with New ISO Class 8 Cleanrooms in Wisconsin and Utah

New cleanroom investments strengthen Rosti’s support for regulated medical and life sciences customers and position the company for continued growth. We are delighted to announce the upcoming opening of new…

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Case studies and posts within Cleanroom production

FAQ

How do you determine the correct clean room class (e.g., ISO 7 or ISO 8) for my product?

The required clean room classification is determined by your product’s intended use, risk profile, and regulatory requirements. High-risk, implantable, or critical-path medical components typically require an ISO Class 7 environment, while lower-risk or non-patient-contact components may be suitable for ISO Class 8.

To define the correct classification, we assess your product’s clean room injection moulding requirements, including material selection, exposure risk, downstream sterilisation, and applicable regulatory standards. This ensures the clean room environment is appropriate without introducing unnecessary complexity or cost.

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