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What Are the Types of Clean Room Injection Materials?


Ⅰ. Medical Device Injection Molding


Our medical-grade plastic materials for medical device injection molding have high molecular weight, chemical resistance and heat resistance. Each type of thermoplastic used for medical molding also has different advantages and qualities, which need to be reviewed before selecting materials for injection molding applications.


Ⅱ. Types of injection molding materials


1. Polycarbonate


Natural and transparent, it is often used for medical tubing. This medical-grade plastic has high tensile, shear and bending strength. It also has high heat resistance, low moisture absorption, and is stronger than acrylic.


Advantages of polycarbonate:


① Impact resistance: no scratches or dents under impact;


② Anti-ultraviolet rays: no corrosion or discolouration under ultraviolet rays;


③ Transparency: can be made into windows and spectacle lenses;


④ Chemical resistance: will not be corroded by chemicals;


⑤ Rigidity: suitable for good glasses and window applications.


2. PEEK


A peculiar medical-grade plastic resin with high chemical resistance, crack resistance and fatigue resistance, and can be sterilized by an autoclave. It has been approved by the FDA for food contact and has a UL 94 V-0 flammability rating.


3. Ultem™


Used for medical equipment and sterilized by autoclave. It can resist environmental stress and cracking, provides excellent dimensional stability, and has excellent strength and stiffness.


We also provide a variety of professional medical-grade plastics with built-in resins and fillers, such as glass fibre carbon fibre, talcum powder or custom colour compounds. This provides certain mechanical advantages or other unique features for the application.


4. Polyetherimide (PEI)


Polyetherimide, also known as Ultem, is an amorphous material with extremely high heat resistance compared to other plastics. Due to its rigidity and high thermal properties, polyetherimide is most commonly used in clean room injection molding, electronic products, and industrial plastic parts.


The advantages of polyetherimide are:


① Rigidity: Hard plastics can be used in high-impact industrial applications;


② Heat resistance: Will not melt or warp at high temperature;


③ High tensile strength: resistant to cracking or fracture under harsh environmental conditions;


④ Flame retardancy: non-flammable and produces low smoke.


5. Polyoxymethylene (POM)


Polyoxymethylene, also known as acetal, is a semi-crystalline polymer with a very hard and natural shiny surface, making it a useful material for various industries. Acetal is most commonly found in automotive applications, household appliances, and electronics.


The advantages of polyoxymethylene are:


① Rigidity: keep firm and not easy to bend;


② Impact resistance: strong and stable enough to resist strong impact;


③ Solvent resistance: will not corrode or rust due to chemicals and solvents;


④ Glossy: smooth and reflective.



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