The core of PPSU particles is a granular material made of polyphenylene sulfone (PPSU), which belongs to the category of high-performance thermoplastic engineering plastics. PPSU particles can be processed into various products through injection molding, extrusion and other processes. PPSU particles rely on the core advantages of “high temperature resistance, safety, and strong toughness” and focus on high-performance plastic raw materials for mid-to-high-end safety and industrial scenarios.

What is PPSU

PPSU (scientific name: polyarylene sulfone, also known as polysulfone) is an amorphous, high-performance thermoplastic. Compared with PSU and PEI, it has better impact resistance and chemical resistance. Tests through high-pressure steam sterilization failure experiments have proven that PPSU has excellent hydrolysis resistance, surpassing other amorphous thermoplastics.

In fact, PPSU can be placed in a steam sterilization environment an unlimited number of times, and high-pressure steam is widely used as a sterilization method for medical components, making PPSU a good material choice for medical equipment. Its synthesis process is similar to that of PSU, with the monomer being 4,4′-biphenol. Its molecular chain contains a large number of biphenyl groups, so its thermal performance is better than that of PSU, with a Tg of about 220°C, and it can be used for a long time in an environment of 180°C.

PPSU color code

color black Natural color light blue Dark blue green yellow grey red White
Color BL001 N000 BB09 DB0099 GR350 Y159 GG6126 R8040 W002
Example

Features & Advantages of PPSU

Polyphenylsulfone (PPSU) is a high-performance thermoplastic featuring outstanding toughness, hydrolysis resistance, and repeated steam sterilization capability, widely used in medical, food-contact and safety-critical applications.

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High Temperature

Continuous service up to 180℃; maintains stability under high heat exposure.

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High Impact Strength

Exceptional toughness and drop resistance, suitable for demanding applications.

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Transparency

High clarity, making it ideal for baby bottles, food trays, and medical devices.

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Hydrolysis Resistance

Withstands thousands of steam sterilization cycles without degradation.

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Radiation Resistance

Excellent resistance to γ-rays and X-rays; suitable for medical sterilization.

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Chemical Resistance

Good compatibility with detergents, disinfectants, and many chemicals.

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Dimensional Stability

Retains mechanical strength and shape under thermal and mechanical stress.

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Electrical Properties

Excellent insulation and dielectric properties over a wide temperature range.

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Food & Medical Safety

Complies with FDA and food-contact standards; widely used in baby care products.

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Easy Processing

Supports injection molding, extrusion, machining, and complex part fabrication.

PPSU Performance Table

Typical values for uncolored products at 23°C

project Test Method unit Typical values
Mechanical properties
tensile strength ISO 527-1/-2 MPa 70
Tensile modulus ISO 527-1/-2 MPa 2270
Yield elongation ISO 527-1/-2 % 7.8
Bending strength ISO 178 MPa 105
flexural modulus ISO 178 MPa 2400
Izod notched impact strength ISO 180/A kJ/m² 68
Thermal performance
Heat deformation temperature HDT/A @1.8MPa ISO 75-1/-2 ℃ 196
Glass transition temperature (DSC, 10℃/min) ISO 11357-1/-2 ℃ 220
Linear expansion coefficient@23℃ ISO 11359-1/-2 E -6 /K 55
flame retardancy
Thickness 1.5 mm UL94 Class V-0
Electrical properties
Volume resistivity 100 V IEC 60093 Ω·m >1E13
Surface resistivity 100 V IEC 60093 Ω >1E15
Relative dielectric constant@100 Hz IEC 60250 3.8
Relative dielectric constant@1 MHz IEC 60250 3.7
Dielectric loss factor @100 Hz IEC 60250 E -4 15
Dielectric loss factor @1 MHz IEC 60250 E -4 86
Dielectric strength K20/K20 (60×60×1 mm³) IEC 60243-1 kV/mm 44
Comparative tracking index IEC 60112 150
General and processing properties
density ISO 1183 g/cm³ 1.29
Saturated water absorption @23℃/50% relative humidity ISO 62 % 0.6
Molding shrinkage (parallel) ISO 2577, 294-4 % 0.9
Molding shrinkage (vertical) ISO 2577, 294-4 % 1
Melt index MFR @365℃/5 kg ISO 1133 g/10 min 28–38
Melt temperature range (injection molding/extrusion molding) ℃ 350–390
Mold temperature range (injection molding/extrusion molding) ℃ 140–180
Note: Typical values ​​should not be interpreted as specifications.