Amodel® PPAfor Cooling & Heating Systems

Am

odel®

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Proven Performance Amodel® polyphthalamide (PPA) has replaced die-cast aluminum in engine cooling systems for over 20 years and is routinely used in under-the-hood applications where heat, humidity and chemical resistance are major considerations.

Similar to polyphenylene sulfide (PPS), Amodel® PPA offers excellent dimensional stability in corrosive, high-temperature environments along with better fatigue and impact resistance, superior strength at 130 °C (266 °F) after prolonged exposure to engine coolants, and faster molding cycle times.

Undercut DesignsAmodel AS grades are unique among high-performance plastics in their ability to mold undercut designs. Simplified mold designs can reduce tooling costs associated with parting lines.

Glycol-resistant Amodel® PPA grades

Amodel® A-1933 HSL 33 % glass fiber, glycol resistant, heat stabilized, lubricated

Amodel® AS-1933 HS 33 % glass fiber, for thick-wall parts (> 3 mm), glycol resistant, heat stabilized, undercut molding

Amodel® AS-1945 HS 45 % glass fiber, for thick-wall parts (> 3 mm), glycol resistant, heat stabilized, undercut molding

Tensile elongation at 130 °C (266 °F)

Ten

sile

elo

ngat

ion

[%]

12

10

8

6

4

2

0Amodel® PPAAS-1945 HS

Amodel® PPAAS-1933 HS

PPS40 % glass �ber

8.7 %

3.0 %

9.8 %

Fatigue resistance at 32 Hz and 170 °C (338 °F)

Fle

xura

l str

ess

[ MP

a ]

Cycles to failure

80

70

60

50

40

301.00E + 071.00E + 061.00E + 05

Amodel® A-1933 HSLPPS 40 % GFPA 6,6 33 % GF

Tensile strength after prolonged exposure to long-life coolant

Ten

sile

str

eng

th [

MP

a ]

Exposure [ hours ]Exposure at 120 °C in 50/50 Dex-Cool® LLC/water

250

200

150

100

50

05,0002,500500 1,0000

Amodel® AS-1945 HSPPS 40 % GFAmodel® AS-1933 HSPA 6,6 33 % GF

Weld line strength after prolonged exposure to long-life coolant

Wel

d li

ne s

tren

gth

[ M

Pa

]

Exposure [ hours ]Exposure at 120 °C in 50/50 Dex-Cool® LLC/water

120

100

80

60

40

20

05,0002,500500 1,0000

Amodel® AS-1945 HSAmodel® AS-1933 HSPPS 40 % GFPA 6,6 33 % GF