Innovation by Chemistry

TORELINA™ polyphenylene sulfide (PPS) polymers offer a unique balance of thermal resistance and chemical resistance that exceed the performance of engineering thermoplastics.  TORELINA™ PPS is available as both linear and branched, with various filler packages, and as optimized blends.  These polymers are suitable for industrial water management components, thermal management including electrical applications, heavy truck, and automotive, as well as food service and other industrial applications.

Key Benefits & Comparative Performance Data for TORELINA™ PPS

If long-term performance under high heat and harsh environments is what you need from your polymer solution, you should consider TORELINA™ polyphenylene sulfide (PPS).

TORELINA™ polyphenylene sulfide (PPS) can bring a unique balance of chemical and thermal resistance for your applications and can outperform other engineering thermoplastics like nylon (PA), polyphthalamide (PPA), polysulfone (PSU), polyphenylsulfone (PPSU), and even polyetherimide (PEI). UL94V-0, NSF61 or FDA-approved TORELINA PPS grades offer excellent dimensional stability and exceptional mechanical properties.

Discover the difference

Request a technical discussion with the Toray PPS experts to gain access to additional technical data on the right TORELINA™ PPS grade to meet your performance requirements.

High thermal stability and low warpage - even at extreme temperatures

TORELINA™ polyphenylene sulfide exhibits excellent long-term heat resistance with a melt point of 280°C and Deflection Temperature under Load (DTUL) of >260°C. Typical compounds meet UL temperature index of 200-260°C in continuous use and can handle short term temperature spikes up to 350°C.

TORELINA™ PPS outperforms competitive materials such as polyphthalamide (PPA) in terms of:

Better heat aging resistance
Excellent warpage resistance
Low water absorption

Better heat aging resistance with TORELINA™ polyphenylene sulfide (PPS)
The figures below show comparative data to demonstrate the better long-term heat aging resistance of general purpose TORELINA™ PPS as well as specialty grades of TORELINA™ PPS versus PPA (polyphthalamide).

Heat aging resistance

General Purpose TORELINA™ outperforms PPA when exposed to heat aging up to 250°C:
  • only a negligible change in tensile strength
  • remains stable in flexural modulus
Polyphthalamide (PPA) shows a dramatic drop
  • in retention of tensile strength and flexural modulus.

Specialty grades of TORELINA™ PPS A504X90B and A310MX04B demonstrate better retention of properties versus polyphthalamide (PPA) which suffers from a significant drop in tensile strength as soon as 200 hours of exposure at 250°C.

Download additional comparative data for specialty grades of TORELINA™ PPS versus PPA (polyphthalamide).

Increase Heat Cycle Resistance up to 200 cycles with specialty grades of TORELINA™ PPS
Toray's specialty TORELINA™ PPS grades A675GS1B and A575W20B resist up to 180 and 200 heat cycles vs only 110 cycles for general purpose PPS as shown in this bar chart below.

Increase Heat Cycle Resistance up to 200 cycles with specialty grades of TORELINA™ PPS

Excellent Warpage Resistance of TORELINA™ PPS - better than competitive PPS
TORELINA™ PPS A575W20B was specifically designed for low warpage and excellent overall dimensional stability. This high flow grade offers excellent processing characteristics and heat cycle resistance. Good heat cycle resistance and warpage resistance are critical performance parameters for structural components.

Warpage resistance

TORELINA™ PPS A575W20B has excellent resistance to warpage compared to ordinary general-purpose PPS

Excellent Hot Water Resistance & Dimensional Stability

TORELINA™ PPS offers excellent dimensional stability even when used under high-temperature, high-humidity conditions such as in industrial water management applications.

TORELINA™ Polyphenylene Sulfide exhibits:
Low mold shrinkage
Low linear thermal expansion
Low water absorption properties

The spider chart below shows a comparison of properties of TORELINA™ PPS versus other high temperature materials including PEI (Polyetherimide), SPS (Syndiotactic Polystyrene), and PBT (Polybutylene Terephthalate).

Physical properties

TORELINA™ PPS can be used in thin-wall molding allowing complex parts with tight tolerances and low warpage.
The high modulus, high HDT, extremely low creep behavior, and wide-ranging chemical resistance of TORELINA™ PPS ensure that parts will retain their dimensional integrity.

Lower water absorption properties with TORELINA™ PPS
Because of its high crystallinity and its chemical structure having very little affinity for water, TORELINA™ PPS exhibits minimal water absorption. TORELINA™ PPS A604WR outperforms PPSU, PPA, and PPE (Polyphenylene Ether) and has the following certifications:
Water regulations: NSF61, WRAS, KTW/W270, ACS
Food regulations: FDA, EU10/2011

Very Low Mold Shrinkage and Lower Water Absorption than PA66 and PPA

Two key parameters are important for processing: dimensional stability and service in high humidity and water based chemical environments. TORELINA™ PPS exhibits very low water absorption compared to other polymers (PA and PPA). And its very low mold shrinkage provides significant dimensional stability advantages.

Physical properties and mold shrnkage comparison

Comparative Water Absorption Rates PPS PA66 PPA

Excellent Chemical Resistance - equivalent to fluoropolymer resins

If you need a polymer that is reliable in harsh chemical environments, TORELINA™ polyphenylene sulfide (PPS) offers excellent chemical resistance that exceeds the performance of PA6, PA66 and PPA, and is equivalent to that of fluoropolymer resins.

Chemical Resistance data for PPS vs PTFE, PFA, and FEP Download Chemical Resistance data for PPS vs PTFE, PFA, and FEP.
See how TORELINA™ PPS compares in retention of weight and strength versus fluoropolymers after 200 hours of exposure to 10% sulfuric acid and 10% NaOH.

TORELINA™ PPS is resistant at both ambient or elevated temperatures to:
Long-life coolants
Hydraulic fluids

Toray's TORELINA polyphenylene sulfide has limited solubility at temperatures below about 200°C (392°F). Very few chemical agents can attack PPS such as sulfuric, hydrochloric, or nitric acid at elevated temperature/concentration.

Acetic Acid Resistance

TORELINA™ PPS outperforms PPA showing no significant loss of tensile strength after 500 hours exposure to acetic acid.

Long-Life Coolant Resistance of TORELINA™ PPS - better than PPA
TORELINA™ PPS has better long-life coolant resistance vs. polyphthalamide PPA as shown in the figure below. TORELINA™ PPS shows a higher retention of tensile strength and other physical and mechanical properties when exposed to coolants for more than 5000 hours.

Coolant resistance

Maintains Mechanical Properties - a strong, tough polymer

TORELINA™ PPS offers high strength, high rigidity, and low degradation characteristics even in high temperature conditions. It also shows excellent fatigue endurance and creep resistance. TORELINA CX1B series are designed for enhanced coolant resistant applications, exceeding the performance of competitive PPS.

Mechanical properties

Electrical Performance and Flame Retardant - without use of additives

TORELINA™ PPS passes the UL94V-0 standard without adding flame retardants (UL File No. E41797). Other competitive engineering plastics require flame retardant additives to be classified as UL 94 V-0. Flame retardant additives reduce the mechanical and electrical properties of a plastic. Further, the thermal degradation of flame retardant additives can produce toxic, corrosive off-gasses.

Since TORELINA™ PPS compounds require no flame-retardant additives, its regrind is as flame resistant as the virgin material, and there are no alterations of the safety and properties of the material.

Physical Resistance Comparison TORELINA™ Specialty PPS for Electronics Applications with no additional flame retardants
Download Physical Property Comparison of specialty PPS grades
with no additional flame retardants. Includes grades for standard, high strength, low warpage, and dimensional stability.

Excellent electrical properties even in high temperatures

TORELINA™ PPS has excellent electric properties even in high-temperature, high-humidity, and high-frequency conditions. Physical property data in the table below compares 40% glass-filled TORELINA™ PPS A504X90 with 20% glass-filled PEI (Polyetherimide), and 30% glass-filled SPS (Syndiotactic Polystyrene).

Toray's TORELINA™ PPS has a higher dielectric constant and a lower dissipation factor versus competing materials PEI and SPS.


Case Studies from TORELINA™ Polyphenylene Sulfide Engineering Polymers

Enhance performance of polymers with NANOALLOY Technology by Toray

Case study features performance comparison and application examples for three polymer alloys:

PBT/PC, PA6, and PPS. NANOALLOY® technology is an innovative microstructure control technology developed by Toray. This technology can bring about dramatic improvement in characteristics compared to existing materials by minutely dispersing multiple polymers on a nano-metric scale.


Laser Welding Thermoplastics Replace Standard PBT in Sensitive Electronics Components

See how sensitive electronic components can benefit from TORAYCON™ PBT 4151G30HLSG2, the latest generation PBT grade designed by Toray to easily mold and easily laser weld complex designs and intricate electronics parts. For extreme temperature applications above 185°C, TORELINA™ PPS A602LX01 is also suitable for laser welding.


Manage Heat in Industrial and Automotive Applications with TORELINA™ PPS

Thermal management systems for vehicles require light-weight, strong materials with excellent resistance to coolants and high temperatures.

Coolant system parts such as water pumps, water pump impellers, thermostats, and housings for on-road and off-road vehicles need to withstand high temperatures and long hours of harsh coolant exposure.

Design strong, light-weight parts with excellent resistance to coolants and dimensional stability in fluctuating system temperatures with a new generation of PPS from Toray.


TORELINA™ PPS replaces Brass in Hot Water Management - Saves Weight and Cost

Hot water management systems require light-weight, strong materials with excellent resistance to harsh environments. See performance and regulatory approvals for TORELINA™ PPS and comparison of weight and cost savings when converting brass fitting components to TORELINA™ PPS.



Downloads from TORELINA™ Polyphenylene Sulfide Engineering Polymers

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