HIPS
(high impact polystyrene)
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Download Product Brochure (40kb - pdf)
Download MSDS (36kb - pdf)
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HIPS is a low cost plastic material that is easy to machine and fabricate. HIPS is often specified for
low strength structural applications when impact resistance, machinability, and low cost are
required. It is frequently used machining pre-production prototypes since it has excellent
dimensional stability and is easy to fabricate, paint and glue. Natural (translucent white) HIPS is
FDA compliant for use in food processing applications.
The following physical property information is based on typical values of the base high impact
polystyrene resin.
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| Mechanical Properties |
| Property |
Units |
Test |
Result |
| Flexural Modulus |
psi |
ASTM D790 |
277,000 |
| Flexural Strength @yield |
psi |
ASTM D790 |
6,200 |
| Hardness–Rockwell |
- |
ASTM D785 |
R95, L60 |
| Gardener Impact @ 73°F |
in•lb |
ASTM D3029 |
160 |
| Izod Impact Strength Notched @ 73°F |
ft•lbs/in |
ASTM D256 |
2.1 |
| Izod Impact Strength Notched @ 0°F |
ft•lbs/in |
ASTM D256 |
1.2 |
| Tensile Elongation @break |
% |
ASTM D638 |
52.0 |
| Tensile Modulus |
psi |
ASTM D638 |
239,000 |
| Tensile Strength @break |
psi |
ASTM D638 |
3,500 |
| Tensile Strength @yield |
psi |
ASTM D638 |
2,800 |
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| Other Properties |
| Property |
Units |
Test |
Result |
| Specific Gravity |
- |
ASTM D792 |
1.04 |
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| Thermal Properties |
| Property |
Units |
Test |
Result |
| Coefficient of Thermal Expansion |
in/in/°F |
ASTM D696 |
5.0x105 |
| Flammability Rating–UL94 @.058” |
- |
- |
HB |
| Heat Deflection Temp @66 psi |
°F |
ASTM D648 |
189 |
| Heat Deflection Temp @264 psi |
°F |
ASTM D648 |
165 |
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| Applications Include: |
| Machined prototypes |
| Low-strength structural components |
| Housings |
| Covers |
| Advantages of HIPS: |
| Good impact resistance |
| Excellent machinability |
| Good dimensional stability |
| Excellent aesthetic qualities |
| Easy to paint and glue |
| Low cost |
| FDA compliant |
| Manufacturing Capabilities: |
| Rod: 1/4” to 8” diameter |
| Sheet: 1/8” to 4” thick |
| Color/Grades: |
| Translucent white. |
| (custom colors available) |
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*In addition to our standard capabilities, Westlake also
has the ability to process custom resins in various sizes
and colors with some exceptions.
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