Smiths Metal Centres Polypropylene PP-ELS

Identification & Functionality

Chemical Family

Polyolefins,

Polypropylenes (PP)

Polymer Name

Polypropylene Homopolymer (HPP)

Technologies

Plastics

Product Families

Plastics — Parts, Shapes & Films

Features & Benefits

Labeling Claims

Food Contact Acceptable

Materials Features

Chemical Resistant,

Electrically Conductive,

Excellent Surface Hardness,

Food Contact Acceptable,

General Purpose,

Good Machinability,

High Tensile Strength,

Low Moisture Absorption,

Low Residual Stress

Features & Benefits

Product Attributes	Customer Benefits
Range of grades available Good tensile strength and high surface hardness Excellent chemical resistance Resists stress cracking. Natural product may be used in contact with foodstuffs PP-H may be hot air welded Low density – compared with other engineering plastics. Minimal absorption of moisture. Diameter (PP-H) Product sourced from longstanding manufacturer with ISO accreditation	Correct grade selection for application is optimized Very good all-round product for diverse engineering applications Low cost assembly Easy handling, low inertia, energy saving Aids dimensional stability Huge components are possible Consistent quality ensures uniform characteristics in machining & performance

Applications & Uses

Markets

Electrical & Electronics

Applications

Electrical & Electronics — Other Electrical & Electronics Applications

Typical Applications

PP-ELS - For applications that require high electrical conductivity.

Machinability

The machining of polypropylene is uncomplicated, provided the component tolerances allow for polypropylene’s relatively high co-efficient of thermal expansion and tensile elongation values. Full machining instructions can be supplied on request.

Properties

Flame Rating

UL 94 HB

Physical Form

Bars,

Rods,

Sheets

Mechanical Properties

	Value	Units	Test Method / Conditions
Density (20°C)	0.95	g/cm^³	-
Tensile Strength at Yield	38.0	MPa	-
Elongation at Yield	4.0	%	-
Elongation at Break	No break	%	-
Tensile Modulus of Elasticity	2200.0	MPa	-
Impact Strength	No break	kJ/m^²	-
Notched Impact Strength	No break	kJ/m^²	-
Hardness	80.0	Shore D	-

Thermal Properties

	Value	Units	Test Method / Conditions
Service Temperatures without High Mech. Load - Upper Limit	100.0	ºC	-
Service Temperatures without High Mech. Load - Lower Limit	5.0	ºC	-

Typical Properties

	Value	Units	Test Method / Conditions
Moisture Absorption	0.1	%	ISO 62

Electrical Properties

	Value	Units	Test Method / Conditions
Volume Resistivity	max. 10^⁶	ohm-cm	-
Surface Resistivity	max. 10^⁶	ohm	-

Flammability

	Value	Units	Test Method / Conditions
Flammability	HB	-	UL94

Regulatory & Compliance

Certifications & Compliance

FDA Compliant,

UL 94

Physiological Safety

The FDA (US Food & Drug Administration) has approved the raw materials used for the PP-H grade to allow its use in contact with food – check for any specific limitations required by the FDA.

Technical Details & Test Data

Technical Description

Grade	Modification	Purpose
PP- LS	With addition of carbon. Black color.	Electrically conductive. Black also has better UV resistance.

 

Chemical Resistance

PP-H has extremely good resistance to acids, alkalis and alcohol, salts in aqueous solutions and many solvents. Slight swelling may be caused by permanent contact with grease, oil and wax, but generally not enough to limit the use of the material. Aromatics and halogenated hydrocarbons will cause a reduction in useful working life. The material has no resistance to strong oxidizing agents such as nitric or chromic acids, and halogens.

Packaging & Availability

Product Availability

Extruded round bar PP-ELS

20mm to 100mm in black.

* Sizes not stocked are available on relatively short delivery time. 1, 2 or 3m lengths supplied or cut to customer requirements.