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Molding Materials

     Choosing the right material for your custom plastic injection molding project is an important decision. Before choosing a material, you have multiple items to consider: Part function, application, durability, flexibility and color. Plastic molding materials look and behave differently, so your material choice affects your part’s performance and characteristics. 
     Even the material’s shrink rate needs to be considered. If the plastic injection parts are molded out of one material for the initial production, changing material for future production runs may affect the part’s dimensions. That’s because a different material may have a different shrink rate.
     A list of the most commonly used injection molding materials is given in the table below.


Material

Description

Benefits

Applications

ABS

Common thermoplastic with good impact resistance and toughness.

  • Good impact resistance with toughness and rigidity
  • Metal coatings have excellent adhesion to ABS
  • Excellent processability and appearance
  • Computer housings
  • Musical instruments (recorders & plastic clarinets)
  • Telecom devices
  • Small appliances (enclosures)
  • Automotive (interior trim, wheel covers, emblems)
  • Medical components

Polypropylene

Thermoplastic polymer used for a wide number of applications.

  • Excellent moisture resistance
  • Food grades available
  • Mold–in hinge possible
  • Good impact strength
  • Packaging
  • Industrial components for fluid processing
  • Household goods
  • Automotive
  • Electrical hardware

Polyoxymethylene (POM)

Dimensionally stable thermoplastic with high stiffness and low friction.

  • High tensile strength with rigidity and toughness
  • Good impact and solvent resistance
  • Glossy molded surface
  • Low static and dynamic coefficients of friction (slippery)
  • Many grades have FDA and NSF approvals on food and water contact
  • Replace die-cast metal components
  • Mechanical automotive
  • Business machines
  • Household appliance
  • Gears
  • Bushings
  • Door handles
  • Seat belt parts

Polycarbonate

Thermoplastic material with good temperature resistance and impact strength.

  • High impact resistance
  • Clarity
  • Dimensional stability
  • Chemical resistance (PC blends)
  • Automotive headlights
  • Business machines
  • Consumer products
  • Telecommunications
  • Medical products
  • Mechanical goods

Polycarbonate / ABS

Blend of PC and ABS that creates strong parts for a variety of applications.

  • Good impact resistance with toughness and rigidity
  • Metal coatings have excellent adhesion to ABS
  • Very good indoor UV light color stability
  • Excellent processability and appearance
  • Automotive exterior and interior components
  • Medical hardware
  • Electrical housings
  • Computers
  • Monitors
  • Business equipment housings
  • Enclosures

PVC

PVC is a polymer with good insulation properties, high hardness, and good mechanical properties.

  • Wide range of flexibility
  • Flame retardant
  • Dimensional stability
  • Low cost
  • Medical/healthcare products
  • Automotive applications
  • Household items
  • Electronic extruded wire covering

Nylon

Polymer material that is durable with high elongation and good abrasion resistance.

  • Temperature capability 600°-700° for short term
  • Excellent chemical resistance
  • High resistance to abrasion
  • Tough and withstands repeated impact
  • Automotive components
  • Bearings
  • Electronic connectors
  • Gears
  • Consumer products
  • Industrial products

Acrylic (PMMA)

Material with resistance to breakage often used for transparent applications.

  • Excellent optical clarity
  • Excellent weatherability and resistance to sunlight
  • Rigid with good impact resistance
  • Good light transmission
  • Automotive transparent items such as head/tail lenses and trim
  • Household light fixtures and decorative items
  • Safety equipment and shields

Polystyrene

Light weight material popular for its high impact strength and toughness.

  • Optical clarity
  • High gloss
  • FDA grades available
  • Low cost
  • Good dimensional stability
  • Good rigidity
  • Household goods
  • Containers
  • Furniture
  • Housings
  • Packaging

Polyetherimide (PEI)

Thermoplastic with high heat resistance and excellent mechanical properties.

  • High heat resistance
  • Exceptional strength and impact modulus
  • High dielectric strength
  • Broad chemical resistance
  • Biocompatible
  • Excellent machinability and finishing characteristic
  • Outstanding processability on conventional molding equipment
  • Flame resistance with low smoke evolution
  • Commercial aircraft interiors
  • Healthcare products
  • Cooking utensils
  • Fiber optics
  • Electrical products
  • Electronic parts










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  • +86-755 2488 1120
  • +86-755 2321 1435
  • [email protected]

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