Fortron 1140L4 PPS: Premium High-Strength Material for Durable Injection-Molded Parts

When designing a part for injection molding, it might be daunting to navigate the hundreds of plastic materials available. Our Materials Science blog series aims to make the decision making process a little easier by highlighting some key materials available in each of our manufacturing processes.

In narrowing down material selection, materials properties, manufacturability characteristics, cosmetic appearance, and cost will help guide your choice. Depending on the application, some of these considerations will be more important than others. When material properties and performance are key, the Polyphenylene Sulfide Fortron 1140L4’s strength, resistance, and durability make it a great option.

Product developers often use glass-filled materials, such as Fortron 1140L4, to increase the strength of their parts.

Fortron 1140L4 Properties and Applications

Fortron 1140L4 is a 40% glass-reinforced plastic grade that is the strongest and toughest material in its category. The Polyphenylene Sulfide (PPS) plastic provides excellent heat and chemical resistance, good electrical properties, and is flame-retardant. It offers high hardness and rigidity at elevated temperatures, allowing good load bearing performance as well. The modest filler level provides good weldability properties.

Because of its strong chemical and heat resistance, ultra-high toughness, and good electrical properties outlined above, ideal applications for this grade plastic include automotive and electrical or electronic parts. In the auto industry, Fortron is a great for components requiring high strength and resistance to aggressive chemicals, such as heaters, pumps, valves, and fuel rails. Other common applications include bobbins, lamp housings, brush holders, microwave oven rings, and distillation column packings.

Fortron 1140L4 Specifications

If you are designing a part intended for Fortron injection molding, you will likely be looking for some more specifics on the material such as shrinkage rate, tensile strength, and impact resistance. We’ve outlined some of these properties in the tables below, and you can find more detailed information on Fortron 1140L4 in the material data sheet from the Celanese Corporation published by UL Prospector.

Mechanical	Nominal Value (English)	Nominal Value (SI)	Test Method
Tensile Strength-Break 73F/23C Tensile Strength-Break	29000 psi 28300 psi	200 MPa 195 MPa	ASTM D638 ISO 527-2/1A/5
Tensile Strength-Break 73F/23C Tensile Strength-Break	1.7% 1.9%	1.7% 1.9%	ASTM D638 ISO 527-2/1A/5
Flextural Modulus 73F/23C	2.10E+6 psi	14500 MPa	ISO 178
Flextural Stress	41300 psi	285 MPa	ISO 178

 

 

Impact	Nominal Value (English)	Nominal Value (SI)	Test Method
Charpy Notched Impact Strength -22F, -30C; 73F, 23C	4.8 ft lb/in²	10 kJ/m²	ISO 179/1eA
Charpy Unnotched Impact Strength -22F, -30C; 73F, 23C	25 ft lb/in²	53 kJ/m²	ISO 179/1eA
Notched Izod Impact Strength -22F, -30C; 73F, 23C	4.8 ft lb/in²	10 kJ/m²	ISO 180/1A
Unnotched Izod Impact Strength 73F, 23C	16 ft lb/in²	34 kJ/m²	ISO 180/1U

Fortron 1140L4 has a hardness rating of 100 on the Rockwell Hardness M-Scale, a melting temperature of 536F or 280C, and shrinkage of 0.13 in. or 3.18mm. Its electrical surface resistivity is >1.0E + 15 ohms, and its electrical strength is 710V/mil or 38kV/mm. The material has a flame rating of V-0 at 0.015in (0.38mm) and 0.06 in. (1.5mm) and a rating of 5VA at 0.12in (3.0mm).

For more information on our manufacturing materials, visit our material comparison guide, and check out our alternative materials guide, a great resource in times of supply shortages.