Plastic Mounted Block Materials

plastic mounted block materialsglass filled plastic mounted blockPBT plastic mounted blocks

BLOCK CONSTRUCTION:

Blocks are first molded from a high grade of glass-filled thermoplastic polyester (PBT). The block’s spherical bore is machined for concentricity and proper fit of the insert bearing. The last step in manufacturing is machining the solid base for flatness.

MATERIALS:

BLOCKS:PBT Polyester, glass filled

MAXIMUM IN AIR:180° F

SUBMERGED IN WATER:120° F

PROPERTIES OF PBT

Properties

Unit

Test Method

Value

Mechanical

Tensile strength at yield

N/mm2

ASTM D 638

115

at break

N/mm2

ASTM D 638

-

Elongation at yield

%

ASTM D 638

3

at break

%

ASTM D 638

 

Tensile modulus

N/mm2

ASTM D 638

8000

Flexural yield strength

N/mm2

ASTM D 790

-

Flexural yield strength

N/mm2

ASTM D 790

170

Flexural modulus

N/mm2

ASTM D 790

7000

Notched impact strength Charpy

K/m2

DIN 53453

12

Notched impact strength IZOD

J/m

ASTM D 256

100

Thermal

Oxygen index*

%

ASTM D 2863

19

Flame retardancy (1/6 mm thickness)

-

UL stand 94

94HB

Heat resistance: Vicat, method B

°C

ASTM D 1525

210-215

Thermal conductivity

W/m2C

ASTM C 177

0.19

Mold shrinkage flow

%

ASTM D 1299

0.4 - 0.6

Cross flow direction

%

ASTM D 1299

0.6 - 0.8

Physical

Water absorption 24 Hours, 23°C

-

ASTM D 570

 

CHEMICAL RESISTANCE OF PBT

Chemical Media

°C

Immersion

# Days

% Retention of strength

Acids

10% Hydrochloric

23

30

89

23

90

85

23

180

82

10% Sulfuric

23

30

97

23

90

94

23

180

90

35% Sulfuric (battery)

23

30

97

23

180

96

66

30

84

66

180

35

10% Acetic

23

30

89

23

180

88

Bases

5% Potassium Hydroxide

23

30

83

23

90

10

10% Sodium Hydroxide

23

30

2

23

180

-

10% Ammonium Hydroxide

23

30

90

23

90

87

23

180

58

Organic Solvents

Ethyl Alcohol

23

30

99

23

180

94

Methyl Alcohol

23

30

91

23

180

76

Isopropyl-Alcohol

23

30

100

23

180

100

Isopropyl-Alcohol & Water (50-50)

23

30

96

23

180

93

Turpentine

23

30

92

23

180

66

Acetone

23

30

90

23

180

63

Click here to send a message or call us at 1-888-000-9999