Hydex® 4101

PBT-Polybuthylene Terephthalate

Hydex® 4101 is manufactured from Polybuthylene Terephthalate polyester (PBT-P) resin. It is a semi-crystalline thermoplastic. Hydex® 4101 offers excellent mechanical properties combined with good chemical resistance. PBT-P has a good impact resistance and toughness, low coefficient of friction and wear, and does not need lubrication. It also is resistant to chemicals, chlorine, water, and steam. It is available in FDA-approved white and non-FDA black colors.

Hydex® 4101L is an enhanced grade that is internally-lubricated with TFE fillers which are designed for use in higher wear resistance, PV range and lower coefficient of friction applications.

Both Hydex® 4101 and 4101L are approved for direct food contact (FDA, USDA, and 3A Dairy compliant).

Benefits:

No Center Line Porosity
Superior Chemical Resistance
Low Coefficient of Friction
Good Impact Strength
Good Ductility
Hard and Durable Surface
FDA, USDA, 3A Dairy Approved
Replaces Brass, Aluminum, Steel, UHMW, and Acetal

Typical Applications

Food Piston Pumps
Valves and Valve Bodies
Feeder Blocks
Timing Screws
Gears
Cams
Bushings/Bearings
Wear Strips
Fuel Systems

Hydex® 4101 PBT-P Properties
Property					ASTM or UL Test	Hydex® 4101	Hydex® 4101L
Water Absorption (24hrs)				(%)	D-570	0.07	0.07
Density				(lb/in³)	D-792	0.047	0.049
Density				(g/cm³)	D-792	1.31	1.36
IZOD Notched Impact				(ft-lb/in)	D-256	0.7	0.7
Tensile Strength				(psi)	D-638	9,400	7,200
Tensile Modulus				(psi)	D-638	425,000	380,000
Tensile Elongation at Break				(%)	D-638	50	40
Hardness				(Rockwell R)	D-785	R120	R110
Compressive Strength				(psi)	D-695	11,000	11,000
Compressive Modulus				(psi)	D-695	-	-
Flexural Strength				(psi)	D-790	11,600	10,600
Flexural Modulus				(psi)	D-790	420,000	390,000
Thermal Conductivity				(BTU-in/ft²-hr-°F)	C-177	-	-
Thermal Conductivity				(x 10⁴ cal/cm-sec-°C)	C-177	-	-
Heat Deflection Temp at 264 psi				(°F / °C)	D-648	200 / 93	195 / 89
Coefficient of Linear Thermal Expansion				(x 10^-5 in./in./°F)	D-696	4.5	5.0
Flammability Rating					UL-94	H-B	H-B
Melting Temperature				(°F / °C)	D-3418	420 / 215	420 / 215
Max Operating Temp				(°F / °C)	-	221 / 105	221 / 105
Dialectric Strength, 1/8" thick				(V/mil)	D-149	410	-
Dialectric Constant at 60 Hz					D-150	3.3	-
Dissipation Factor at 60 Hz					D-150	0.002	-
Volume Resistivity at 50% RH				(ohm-cm)	D-257	4.5 x 10¹⁶	-
Physical	Mechanical	Thermal	Electrical