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PACTomite®
Large composite Rings and Cones
LPC’s extensive knowledge of epoxy chemistry and advanced modelling techniques enable us to develop a composite Ring that exceeds our customer’s demanding expectations. Our modern winding technology, advanced machining processes, and sophisticated inspection tools allow us to build thick-walled, composite structures with exacting precision. 
Thick walled composite Rings can be manufactured by filament winding with E-glass roving, Broad cloth convolute winding and / or a combination of the two systems.
 

measurement
mm

Outer Diameter

3500

Wall Thickness

455

Length

8000

 

 

Glass Transition Temperature,Tg 
ASTM 1640/ITS 851848

185℃

Mpa﹡

Flexural Strength
ISO 178

970

Flexural Modulus,
ISO 178

33,000

Compression Strength Radial, 
ISO 604

116

Compression Strength Tangential.
ISO 604

190

﹡Typical values for the PACT RING ER1000Z epoxy composite system
 

Composite Systems

 

1003.0

1005.0

1000Z

1015.0

Compression strength,KPSI
ASTM Test D348

21.0

25.0

25.5(85.6*)

22.5

Compression Modulus,MPSI
ASTM Test D348

3.1

3.1

3.3

2.9

Compression strain@failure,%
ASTM Test D348

0.91

0.98

0.96

0.89

Flexural strength@23℃KPSI
ASTM Test D970

20.9

22.9

23.4(141*)

21.3

Flexural modulus@23℃,MPSI
ASTM Test D970

3.0

3.0

3.0
(4.7*)

2.8

Flexural strain@failure23℃,%
ASTM
Test D970

1.1

1.4

1.4

1.2

Flexural strength@155℃,KPSI
ASTM Test D970

9.3

9.3

9.5(85.6*)

**

Flexural modulus@155℃,MPSI
ASTM Test D970

1.1

1.1

1.3(3.8*)

**

Flexural strain@failure155℃,%
ASTM Test D970

2.4

2.4

2.4

**

Compression creep@1,000hrs,110℃,
300PSI, axial direction
ASTM Test D621

0.15

0.15

0.14

0.18

Compression

creep@1,000hrs,
155℃,% 5,000PSI
,
ASTM Test D621

1.60

1.60

1.50

**

Compression

creep@1,000hrs,
155℃,% 10,000PSI
,
ASTM
  Test D621

1.88

1.88

1.70

**

 

Tg by DMA,℃
ASTM Test E1640

160+

170+

185+

140.0

AC Dielectric, V/mil
ASTM Test D229

320

320

350

380

Dissipation Factor,
ConditionA,60Hz,2KV AC,%
ASTM Test D150

0.28

0.28

0.24

0.22

Note:
All TEST DATA BASED ON A 55°from Axis Filament Wound Tube   
*Hoop wind,90°from Axis. 
** Material glass transition temperature (Tg)too low for 155℃ testing. 

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