Polystyrene (PS) Injection Molding

Polystyrene (PS) injection molding produces parts with good insulation properties and high optic clarity
 
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Polystyrene is an amorphous thermoplastic that offers transparency and heat resistance. It’s commonly used in medical applications, packaging and containers, and appliances. The resin is also food contact compliant.

We offer two grades of polystyrene through our injection molding service:

  • Styron 666D is a common material for medical applications and offers high clarity and medium heat resistance.
  • Styron 498 is a high impact and high gloss version of polystyrene. It’s often used in appliances, consumer electronics, and medical applications.
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Injection Molded Polystyrene (PS) Material Properties

Tensile Modulus
Tensile Strength
(Break)

Tensile Elongation 
(Break)

Melt Mass-Flow RateHardness
(Rockwell)		Data Sheet
Styron 666D460,000 psi6,240 psi3%8.0 g/10 min107 
Styron 498319,000 psi4,350 psi45%3.5114 
Tensile Modulus
Tensile Strength
(Break)

Tensile Elongation 
(Break)

Melt Mass-Flow RateHardness
(Rockwell)		Data Sheet
Styron 666D3,170 MPa43.0 MPa3%8.0 g/10 min107 
Styron 4982,200 MPa30 MPa45%3.5114 
Cnc machining design guide

Material Alternatives for Injection Molding

Navigating supply chain issues is a constant challenge, especially in times of material shortages. To help, we created a detailed guide to resin substitutes for commonly molded thermoplastics.

Scientific molding consistently delivering quality parts

Polystyrene (PS) Injection Molding Applications

PS is an economical resin choice for a wide variety of industries spanning medical, consumer, and packing applications.

PS is often used for the following parts:

  • Medical devices and components
  • Lab equipment
  • Appliances
  • Food storage

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