Material Selection

Plastic molding material selection can affect the performance of the plastic part in terms of tensile strength, temperature resistance, appearance, life-span, reliability and production cost.

With the use of plastics for precision optics increasingly prevalent in today’s optical markets, customers are also opting for lighter and tougher materials for their optical components. Apart from optical properties such as clarity and refractive index, other properties such as abrasion resistance, impact strength and flexural modulus are equally important factors for consideration.

Here at Unisteel, we support a wide range of materials and can help customers in selecting the ideal materials to get the most out of your products.

Material ABS (Acrylanitrile
Butadiene Styrene)
PMMA (Polymethylmethacrylate) POM (Polyoxymethylene)

Features & Benefits

  • Amorphous copolymer
  • Good impact strength and appearance
  • Commonly used in computer housings, small appliances, automotive interior trim and medical components
  • Amorphous polymer with superb clarity
  • Excellent weather durability for outdoor applications
  • Ideal for use in optical applications
  • Semi-crystalline polymer with excellent lubricity
  • Good resistance against chemical and fatigue
  • Suitable for demanding industrial applications

Physical Properties

Tensile strength (PSI)

Flexural modulus (103 PSI)

Impact strength (ft-lb/in)

Maximum temperature (°C)

Chemical resistance

 

5,000 - 7,500

270 - 380

3.0 - 7.5

85

Poor to fair

 

6,000 - 11,000

200 - 600

0.2- 4.0

77

Excellent

 

6,000 - 22,000

380 - 450

0.8 - 2.0

82

Excellent

 

Material LCP
(Liquid Crystal Polymer)
PC (Polycarbonate) PPS (Polyphenylene
Sulphide)

Features & Benefits

  • Aromatic polyester-based chemistry
  • Tensile strength and modulus are close to aluminium
  • Amorphous material with superb clarity
  • Excellent impact strength and mechanical properties
  • Ideal for use in optical applications

 

  • Semi-crystalline material with good mechanical properties
  • Excellent chemical resistance at elevated temperatures
  • Excellent processibility

Physical Properties

Tensile strength (PSI)

Flexural modulus (103 PSI)

Impact strength (ft-lb/in)

Maximum temperature (°C)

Chemical resistance

 

12,000 - 32,000

1,300 - 4,600

1.1 - 11.0

221

Good to excellent

 

9,000 - 23,000

340 - 1,400

2.0 - 18.0

120

Poor to fair

 

14,000 - 28,000

550 - 2,900

0.5 - 6.0

232

Good to excellent

 

Material PA (Polyamide) PBT (Polybutylene
Terepthalate)
Polysulfone

Features & Benefits

  • Semi-crystalline polymer
  • Reinforced to offer better impact strength, flexibility and dimensional stab ility
  • Semi-crystalline polymer with versatility
  • Superior resistance against abrasion, temperature and moisture
  • Excellent electrical properties with superb impact strength

 

  • Temperature-resistant amorphous material
  • High Tg (195° C)
  • Excellent biocompatibility

Physical Properties

Tensile strength (PSI)

Flexural modulus (103 PSI)

Impact strength (ft-lb/in)

Maximum temperature (°C)

Chemical resistance

 

8,000 - 17,000

170 - 1,200

2.0

82

Good to excellent

 

6,000 - 13,000

300 - 1,200

1.0

121

Fair to good

 

9,500 - 18,000

390 - 1,500

0.7 - 7.0

149

Fair to good


The information presented above is of a general nature and shall not be relied upon other than for preliminary material identification purposes only. Other materials are available upon request.