Ryton® PPS - Engineering Properties

Overview

Detailed engineering properties are available for commonly used Ryton® PPS compounds and Ryton® PPS Alloy compounds. These feature industry standard test methods and typical end-use operating conditions. If you are unable to locate data for the test method or product required, please contact our technical experts for further assistance.

Abrasion & Friction

Thrust Washer Test

The dynamic coefficient of friction and wear rate of Ryton® PPS compounds has been determined using a Thrust Washer machine according to ASTM D 3702. In this test, a specimen having a ring-shaped test surface is rotated against a stationary steel washer at a specified speed and under a specified weight for a specified period of time, and the reduction in thickness of the test specimen is then measured. The dynamic coefficient of friction may also be determined from the torque on the rotating specimen during the test. These tests were performed dry, at 36 rpm (velocity 10 ft/min, 3.05 m/min), under a 50 pound (22.7 kg) test load (250 psi, 1.72 MPa).

Coefficient of Friction and Wear Resistance of Ryton® PPS Compounds
Ryton® PPS CompoundCountersurfaceTest DurationMaterial COFMaterial Wear RateCountersurface Wear Rate
hoursg/hrin/hrmm/hrg/hr
R-452100 Steel (Rc 60)100.501.2 x 10-22.2 x 10-35.5 x 10-27.0 x 10-3
BR42B52100 Steel (Rc 60)1000.323.8 x 10-46.2 x 10-51.6 x 10-33.0 x 10-4
R-4-200NA1018 Steel (Rc 20)200.406.2 x 10-31.0 x 10-32.6 x 10-23.6 x 10-3
R-4-220BL1018 Steel (Rc 20)200.437.4 x 10-31.3 x 10-33.3 x 10-23.9 x 10-3
BR42B1018 Steel (Rc 20)1600.393.7 x 10-46.0 x 10-51.5 x 10-32.1 x 10-4


Taber Abrasion Test

The abrasion resistance of Ryton® PPS compounds has been determined using the Taber abrasion apparatus according to ASTM D 1044. In this test, a flat plaque test specimen is mounted on a turntable in contact with a weighted abrasive wheel, and after a selected number of revolutions of the wheel at constant speed, the weight loss of the specimen is determined.

Taber Abrasion Testing of Ryton® PPS Compounds
Weight Loss (g) After Indicated Number of Revolutions
Ryton® PPS CompoundWheelLoad50010001500200010000
R-4CS-101 kg-----0.070---------------
R-4-02CS-101 kg-----0.040---------------
R-4-220NACS-101 kg-----0.054---------------
R-7-120NACS-101 kg-----0.064---------------
BR111CS-101 kg-----0.051---------------
BR42BCS-101 kg-----0.015---------------
XK2340CS-101 kg-----0.031---------------
R-4-200BLCS-171 kg-----0.057----------0.625
R-4-220BLCS-171 kg0.0400.0560.0660.077-----
R-7-120BLCS-171 kg0.0470.0790.1030.130-----
XE5030BLCS-171 kg-----0.055----------0.632
XE4050BLCS-171 kg-----0.107----------0.976


Coefficient of Friction

The coefficient of friction of 40% glass fiber reinforced PPS (Ryton® R-4 PPS) was determined using the Alpha Molykote LFW-1 friction and wear test machine. The flat block test specimens were run against a steel ring at selected speeds under a 15 pound (6.8 kg) load. There appeared to be little difference in the static and dynamic coefficient of friction.

Coefficient of Friction of 40% Glass Fiber Reinforced PPS
SpeedCOF
0 rpm (static)0 ft/min (0 m/min)0.50
100 rpm (dynamic)29 ft/min (8.8 m/min)0.55
190 rpm (dynamic)55 ft/min (16.8 m/min)0.53

Creep

Creep Charts for Ryton® PPS Compounds

XK2340 Tensile Creep

Ryton-XK2340-creep-data

XE5030BL Tensile Creep

Ryton-XE5030BL-creep-data

​XE4050BL Tensile Creep

Ryton-XE4050BL-creep-data

R-7-220BL Tensile Creep

Ryton-R7220BL-creep-data

R-4 Tensile Creep

Ryton-R4-creep-data

R-7-120BL Tensile Creep

Ryton-R7120BL-creep-data

R-4-02XT Tensile Creep

Ryton-R402XT-creep-data

R-4-200BL Tensile Creep

Ryton-R4200BL-creep-data

BR42B Tensile Creep

Ryton-BR42B-creep-data

BR111 Tensile Creep

Ryton-BR111-creep-data

Dielectric Properties

Because of the inherent thermal stability of the polyphenylene sulfide (PPS) polymer, the dielectric properties of Ryton® PPS compounds remain stable over a wide range of temperatures and frequencies. The data shown below were generated using identical test specimens in accordance with standard test methods within a controlled temperature chamber.

Effect of Temperature and Frequency on Dielectric Properties of Ryton® PPS Compounds

 

R-4-200BL

R-4-230NA

R-7-120NA

 

 

Dielectric
Constant

Dissipation
Factor

Dielectric
Constant

Dissipation
Factor

Dielectric
Constant

Dissipation
Factor

23°C

10 Hz

4.17

0.0020

4.19

0.0023

4.00

0.0013

23°C

10 kHz

4.15

0.0017

4.15

0.0026

3.93

0.0015

23°C

10 MHz

4.04

0.0021

4.09

0.0023

3.81

0.0017

100°C

10 Hz

4.33

0.0038

4.26

0.0028

4.10

0.0018

100°C

10 kHz

4.24

0.0047

4.21

0.0029

4.07

0.0024

100°C

10 MHz

4.23

0.0049

4.20

0.0035

3.92

0.0028

200°C

10 Hz

4.40

0.0034

4.34

0.0037

4.17

0.0027

200°C

10 kHz

4.38

0.0039

4.26

0.0040

4.09

0.0031

200°C

10 MHz

4.34

0.0042

4.24

0.0041

4.01

0.0035

Test Method: ASTM D 150


Effect of Temperature on Insulating Properties of Ryton® R-4 PPS

 

Specimen

23°C

100°C

150°C

200°C

 

Thickness

73°F

212°F

302°F

392°F

Dielectric Strength*

V/mil

3.2 mm

450

330

320

-----

kV/mm

3.2 mm

18

13

12

-----

Dielectric Strength*

V/mil

1.6 mm

-----

570

490

-----

kV/mm

1.6 mm

-----

22

19

-----

Volume Resistivity**

ohm·cm

1.6 mm

1.0 X 1016

8 x 1015

1.4 x 1014

1.2 X 1012

* Test Method: ASTM D 149

** Test Method: ASTM D 257

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Fatigue

S / N Curves for Ryton® PPS Compounds

BR111 Flexural Fatigue

Ryton-BR111-flexural-fatigue

BR111 Tensile Fatigue

Ryton-BR111-tensile-fatigue

BR42B Flexural Fatigue

Ryton-BR42B-flexural-fatigue

R-4 Tensile Fatigue

Ryton-R4-tensile-fatigue

R-4-02XT Tensile Fatigue

Ryton-R402XT-tensile-fatigue

R-4-200BL Tensile Fatigue

Ryton-R4200BL-tensile-fatigue

R-7-120BL Tensile Fatigue

Ryton-R7120BL-tensile-fatigue

Mechanical Properties

Mechanical Properties of Ryton® PPS Compounds at Various Temperatures


Tensile Strength

Nominal Tensile Strength of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

MPa

195

180

160

140

105

65

45

kpsi

28

26

23

20

15

9.5

6.5

R-4-220BL

MPa

190

175

160

145

110

65

50

kpsi

28

25

23

21

16

9.5

7.5

R-4-230BL

MPa

135

130

130

130

110

70

45

kpsi

20

19

19

19

16

10

6.5

R-4-240BL

MPa

195

165

150

130

100

60

45

kpsi

28

24

22

19

15

8.5

6.5

R-7-120BL

MPa

175

135

120

120

100

70

50

kpsi

25

20

17

17

15

10

7.5

R-7-220BL

MPa

185

160

150

140

115

80

60

kpsi

27

23

22

20

17

12

8.5

BR111BL

MPa

180

155

140

125

110

70

45

kpsi

26

23

20

18

16

10

6.5

BR42B

MPa

220

190

165

155

120

75

55

kpsi

32

28

24

23

17

11

8.0

XE5030BL

MPa

160

130

110

95

75

45

35

kpsi

23

19

16

14

11

6.5

5.0

XE4050BL

MPa

175

130

110

95

75

50

40

kpsi

25

19

16

14

11

7.5

6.0

XK2340

MPa

205

195

165

140

120

90

75

kpsi

30

28

24

20

17

13

11

Test Method: ISO 527

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Tensile Modulus

Nominal Tensile Modulus of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

GPa

16

14

14

14

12

7.0

5.0

Mpsi

2.4

2.1

2.1

2.1

1.8

1.0

0.7

R-4-220BL

GPa

15

14

14

14

11

6.0

5.5

Mpsi

2.2

2.1

2.1

2.1

1.6

0.9

0.8

R-4-230BL

GPa

16

14

15

14

11

7.0

5.5

Mpsi

2.4

2.1

2.2

2.1

1.6

1.0

0.8

R-4-240BL

GPa

13

13

13

13

10

5.0

4.0

Mpsi

1.9

1.9

1.9

1.9

1.5

0.7

0.6

R-7-120BL

GPa

21

19

18

17

16

7.0

6.5

Mpsi

3.1

2.8

2.6

2.5

2.4

1.0

1.0

R-7-220BL

GPa

17

17

16

16

12

8.0

7.0

Mpsi

2.5

2.5

2.4

2.4

1.8

1.2

1.0

BR111BL

GPa

20

21

20

20

15

8.5

7.5

Mpsi

2.9

3.1

2.9

2.9

2.2

1.2

1.1

BR42B

GPa

17

16

16

15

12

7.5

6.0

Mpsi

2.5

2.4

2.4

2.2

1.8

1.1

0.9

XE5030BL

GPa

10

10

10

10

7.0

4.0

3.5

Mpsi

1.5

1.5

1.5

1.5

1.0

0.6

0.5

XE4050BL

GPa

12

11

11

10

7.5

4.0

3.5

Mpsi

1.8

1.6

1.6

1.5

1.1

0.6

0.5

XK2340

GPa

18

15

12

11

9.5

7.5

7.0

Mpsi

2.6

2.2

1.8

1.6

1.4

1.1

1.0

Test Method: ISO 527

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Unnotched Izod Impact Strength

Nominal Unnotched Izod Impact Strength of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

kJ/m²

33

35

36

37

31

30

27

R-4-220BL

kJ/m²

28

30

---

---

---

28

---

R-4-230BL

kJ/m²

20

16

18

19

16

17

20

R-4-240BL

kJ/m²

43

42

43

43

43

37

35

R-7-120BL

kJ/m²

15

15

14

15

15

14

15

R-7-220BL

kJ/m²

20

20

---

---

---

22

---

BR111BL

kJ/m²

22

20

20

21

19

20

18

BR42B

kJ/m²

37

40

39

35

36

35

30

XE5030BL

kJ/m²

50

45

45

43

43

37

34

XE4050BL

kJ/m²

41

35

32

33

33

30

27

XK2340

kJ/m²

26

35

31

26

27

28

27

Test Method: ISO 180/U

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Elongation

Applications
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

%

1.4

1.5

1.4

1.4

1.9

3.4

3.0

R-4-220BL

%

1.4

1.4

1.4

1.4

2.0

3.3

3.0

R-4-230BL

%

1.0

1.0

1.0

1.2

1.9

2.7

2.2

R-4-240BL

%

1.9

1.8

1.7

1.7

2.3

4.2

4.3

R-7-120BL

%

1.0

0.8

0.8

0.9

1.4

2.7

3.0

R-7-220BL

%

1.1

1.0

1.1

1.1

1.4

2.3

2.2

BR111BL

%

1.0

1.0

0.9

0.9

1.6

2.5

2.3

BR42B

%

1.8

1.7

1.6

1.8

2.5

3.5

3.8

XE5030BL

%

2.0

2.0

1.8

1.8

3.3

4.4

3.8

XE4050BL

%

1.9

1.9

1.8

1.7

3.1

5.3

4.9

XK2340

%

1.4

1.8

2.1

2.3

2.8

3.4

3.9

Test Method: ISO 527

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Flexural Strength

Nominal Flexural Strength of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

MPa

300

280

265

245

190

110

80

kpsi

44

41

39

36

28

16

12

R-4-220BL

MPa

270

250

240

225

180

110

85

kpsi

39

36

35

33

26

16

12

R-4-230BL

MPa

210

180

195

200

165

100

75

kpsi

31

26

28

29

24

14

11

R-4-240BL

MPa

295

255

235

210

150

85

60

kpsi

43

37

34

31

22

12

9.0

R-7-120BL

MPa

240

210

200

200

175

110

80

kpsi

35

31

29

29

25

16

12

R-7-220BL

MPa

265

240

210

205

175

115

90

kpsi

39

35

31

30

25

17

13

BR111BL

MPa

250

230

210

195

165

100

75

kpsi

36

33

31

28

24

14

11

BR42B

MPa

310

275

250

230

180

120

85

kpsi

45

40

36

33

26

17

12

XE5030BL

MPa

240

195

175

165

120

75

55

kpsi

35

28

25

24

17

11

8.0

XE4050BL

MPa

255

190

170

150

115

75

55

kpsi

37

28

25

22

17

11

8.0

XK2340

MPa

275

265

220

195

175

135

110

kpsi

40

39

32

28

25

20

16

Test Method: ISO 178

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Flexural Modulus

Nominal Flexural Modulus of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

GPa

15

14

16

15

11

6.0

5.0

Mpsi

2.2

2.1

2.4

2.2

1.6

0.9

0.7

R-4-220BL

GPa

14

14

14

13

10

6.0

5.0

Mpsi

2.1

2.1

2.1

1.9

1.5

0.9

0.7

R-4-230BL

GPa

14

14

14

13

10

6.0

5.0

Mpsi

2.1

2.1

2.1

1.9

1.5

0.9

0.7

R-4-240BL

GPa

13

13

13

13

10

5.0

4.0

Mpsi

1.9

1.9

1.9

1.9

1.5

0.7

0.6

R-7-120BL

GPa

19

19

18

17

---

7.0

6.5

Mpsi

2.8

2.8

2.6

2.5

---

1.0

1.0

R-7-220BL

GPa

19

19

18

18

14

8.5

7.5

Mpsi

2.8

2.8

2.6

2.6

2.1

1.2

1.1

BR111BL

GPa

19

19

18

18

14

7.5

6.5

Mpsi

2.8

2.8

2.6

2.6

2.1

1.1

1.0

BR42B

GPa

14

14

13

13

10

6.5

5.5

Mpsi

2.1

2.1

1.9

1.9

1.5

1.0

0.8

XE5030BL

GPa

10

9.0

9.0

8.5

6.0

3.5

2.0

Mpsi

1.5

1.3

1.3

1.2

0.9

0.5

0.3

XE4050BL

GPa

10

9.5

8.5

8.5

6.5

3.5

2.5

Mpsi

1.5

1.4

1.2

1.2

1.0

0.5

0.4

XK2340

GPa

14

12

10

9.0

7.5

6.0

5.5

Mpsi

2.1

1.8

1.5

1.3

1.1

0.9

0.8

Test Method: ISO 178

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Notched Izod Impact Strength

Nominal Notched Izod Impact Strength of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

kJ/m²

7.8

8.0

8.0

8.2

8.0

9.5

13

R-4-220BL

kJ/m²

7.9

7.5

---

---

---

9.7

---

R-4-230BL

kJ/m²

9.5

8.8

8.5

7.5

7.2

7.6

9.9

R-4-240BL

kJ/m²

8.6

8.7

9.0

8.8

9.6

14

18

R-7-120BL

kJ/m²

5.6

5.5

5.7

6.8

5.7

6.7

6.2

R-7-220BL

kJ/m²

9.9

8.0

---

---

---

7.5

---

BR111BL

kJ/m²

8.1

6.5

5.8

8.8

4.9

7.6

6.2

BR42B

kJ/m²

11

9.5

9.1

10

10

14

13

XE5030BL

kJ/m²

7.4

9.5

10

11

12

15

17

XE4050BL

kJ/m²

6.2

8.0

8.6

8.7

9.0

11

12

XK2340

kJ/m²

9.7

8.5

9.3

10

10

13

20

Test Method: ISO 180/A

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Compressive Strength

Nominal Compressive Strength of Ryton® PPS Compounds from -40°C to 200°C
Ryton® PPS Compound

 

-40°C

-40°F

23°C

73°F

50°C

122°F

75°C

167°F

100°C

212°F

150°C

302°F

200°C

392°F

R-4-200BL

MPa

340

275

270

240

195

90

70

kpsi

49

40

39

35

28

13

10

R-7-120BL

MPa

---

260

250

275

195

110

70

kpsi

---

38

36

40

28

16

10

BR111BL

MPa

350

295

270

275

215

125

80

kpsi

51

43

39

40

31

18

12

BR42B

MPa

---

255

240

240

160

90

65

kpsi

---

37

35

35

23

13

9.5

XE5030BL

MPa

275

205

---

---

110

55

---

kpsi

40

30

---

---

16

8.0

---

XE4050BL

MPa

275

190

---

---

105

55

---

kpsi

40

28

---

---

15

8.0

---

XK2340

MPa

320

255

---

---

140

95

---

kpsi

47

37

---

---

20

14

---

Test Method: ASTM D 695

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Properties at Cryogenic Temperatures

The physical properties of Ryton® R-4 40% glass fiber reinforced PPS have been determined at cryogenic temperatures in liquid nitrogen (77 K) and in liquid helium (4.2 K). The mechanical properties of the material were not reduced even at these extremely low temperatures. From additional studies, it appeared that 40% glass fiber reinforced PPS also retained its excellent electrical properties at cryogenic temperatures. Other Ryton® PPS compounds would be expected to show similar retention of properties at cryogenic temperatures.

Effect of Cryogenic Temperatures on 40% Glass Fiber Reinforced PPS

23°C

73°F

-196°C

-321°F

-269°C

-452°F

Flexural Strength

kpsi

28.0

38.5

40.5

MPa

195

265

280

Modulus of Elasticity

Mpsi

2.2

2.0

2.1

GPa

15

14

14

Shore D Hardness

 

91

94

-----

Thermal Contraction from 23°C (73°F)

-----

0.296 %

0.340 %

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Stress/Strain

Stress / Strain Curves for Ryton® PPS Compounds

R-4-200BL Tensile Stress/Strain Curves

Ryton-R4200BL-tensile-stress-strain

R-7-120BL Tensile Stress/Strain Curves

Ryton-R7120BL-tensile-stress-strain

BR42B Tensile Stress/Strain Curves

Ryton-BR42B-tensile-stress-strain

R-4-220BL Tensile Stress/Strain Curves

Ryton-R4220BL-tensile-stress-strain

R-7-220BL Tensile Stress/Strain Curves

Ryton-R7220BL-tensile-stress-strain

BR111BL Tensile Stress/Strain Curves

Ryton-BR111BL-tensile-stress-strain

XE4050BL Tensile Stress/Strain Curves

Ryton-XE4050BL-tensile-stress-strain

XE5030BL Tensile Stress/Strain Curves

Ryton-XE5030BL-tensile-stress-strain

​XK2340 Tensile Stress/Strain Curves

Ryton-XK2340-tensile-stress-strain

​R-4-230BL Tensile Stress/Strain Curves

Ryton-R4230BL-tensile-stress-strain

R-4-240BL Tensile Stress/Strain Curves

Ryton-R4240BL-tensile-stress-strain

Weld Lines

Weld Line Strength

Weld lines are formed during the molding process when the melt flow front divides and then flows back together. Typically, the weld line interface is resin rich because the glass fibers tend not to cross the interface. The lack of glass fiber reinforcement across the interface results in lower mechanical strength along the weld line. Gate location and fill patterns should be planned so that weld lines will be eliminated or located in areas of minimal stress whenever possible. 

If weld lines must bear stress, the part design should compensate for the typical weld line strengths indicated below. Weld line strength is highly dependent on molding conditions, so the part and tool design should allow for rapid injection, a hot flow front, and thorough packing. Gas entrapment is very detrimental to weld line strength, so molds must be designed to avoid back filling and should be adequately vented in areas where weld lines form.

Nominal Weld Line Tensile Strength of Ryton® PPS Compounds
BR111 and BR111BL45 MPa6.5 kpsi
BR42B55 MPa8.0 kpsi
R-4 and R-4-0240 MPa6.0 kpsi
R-4-200NA and R-4-200BL60 MPa8.5 kpsi
R-4-220NA and R-4-220BL55 MPa8.0 kpsi
R-4-230NA and R-4-230BL40 MPa6.0 kpsi
R-4-240NA and R-4-240BL80 MPa11.5 kpsi
R-4XT and R-4-02XT55 MPa8.0 kpsi
R-7-120NA and R-7-120BL45 MPa6.5 kpsi
R-7-121NA and R-7-121BL40 MPa6.0 kpsi
R-7-220BL45 MPa6.5 kpsi
XE4050BL45 MPa6.5 kpsi
XE5030BL50 MPa7.5 kpsi
XE5515BL65 MPa9.5 kpsi
XK234060 MPa8.5 kpsi

Test Method: ISO 527, double end gated specimens

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)
THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.