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Continuous operating
temperature, dry heat
• Polyamide - 200°F (94°C)
• Polypropylene - 200°F (94°C)
• Polyester - 270°F (132°C)
• Acrylic copolymer - 248°F (120°C)
• Homopolymer acrylic - 260°F (125°C)
• *PPS - 375°F (190°C)
• Aramid - 400°F (204°C)
• Polyimide - 500°F (260°C)
• *PTFE - 500°F (260°C)
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Water vapor saturated
environment, moist heat
• Polyamide - 200°F (94°C)
• Polypropylene - 200°F (94°C)
• Polyester - 200°F (94°C)
• Acrylic copolymer - 230°F (110°C)
• Homopolymer acrylic - 260°F (125°C)
• PPS - 375°F (190°C)
• Aramid - 350°F (177°C)
• Polyimide - 383°F (195°C)
• PTFE - 500°F (260°C)
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Specific gravity (g/cm³)
• Polyamide - 1.14
• Polypropylene - 0.9
• Polyester - 1.38
• Acrylic copolymer - 1.16
• Homopolymer acrylic - 1.17
• PPS - 1.38
• Aramid - 1.38
• Polyimide - 1.41
• PTFE - 2.3
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Relative moisture regain (%)
@ 68º F & 85% moisture
• Polyamide - 4.0 to 4.5
• Polypropylene - 0.1
• Polyesther - 0.4
• Acrylic copolymer - 1.0
• Homopolymer acrylic - 1.0
• PPS - 0.6
• Aramid - 4.5
• Polyimide - 3.0
• PTFE - 0
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Supports combustion
• Polyamide - Yes
• Polypropylene - Yes
• Polyesther - Yes
• Acrylic copolymer - No
• Homopolymer acrylic - Yes
• PPS - No
• Aramid - No
• Polyimide - No
• PTFE - No
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Microbial resistance
• Polyamide - No effect
• Polypropylene - Excellent
• Polyesther - No effect
• Acrylic copolymer - Very good
• Homopolymer acrylic - Very good
• PPS - No effect
• Aramid - No effect
• Polyimide - No effect
• PTFE - no effect
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Alkalies
• Polyamide - Good
• Polypropylene - Excellent
• Polyesther - Fair
• Acrylic copolymer - Fair
• Homopolymer acrylic - Fair
• PPS - Excellent
• Aramid - Good
• Polyimide - Excellent
• PTFE - Excellent
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Mineral acids
• Polyamide - Poor
• Polypropylene - Excellent
• Polyesther - Fair
• Acrylic copolymer - Good
• Homopolymer acrylic - Very good
• PPS - Excellent
• Aramid - Fair
• Polyimide - Very good
• PTFE - Excellent
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Organic acids
• Polyamide - Poor
• Polypropylene - Excellent
• Polyesther - Fair
• Acrylic copolymer - Good
• Homopolymer acrylic - Excellent
• PPS - Excellent
• Aramid - Fair
• Polyimide - Very good
• PTFE - Excellent
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Oxidizing agents
• Polyamide - Fair
• Polypropylene - Good
• Polyesther - Good
• Acrylic copolymer - Good
• Homopolymer acrylic - Good
• PPS - Excellent
• Aramid - Poor
• Polyimide - Very good
• PTFE - Excellent
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Organic Solvents
• Polyamide - Very good
• Polypropylene - Excellent
• Polyesther - Good
• Acrylic copolymer - Very good
• Homopolymer acrylic -Very good
• PPS - Excellent
• Aramid - Very good
• Polyimide - Excellent
• PTFE - Excellent
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Some trade names
for polymers cited
• Aramid (Nomex®)
• Polyimide (P84®)
• *PPS is polyphenylene sulfide (Ryton®)
• *PTFE is polytetrafluoroethylene (Teflon®)
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