General Purpose Polystyrene (GPPS)

General Purpose Polystyrene (GPPS) is a transparent, rigid, and high-performance thermoplastic polymer widely used in various industrial and consumer applications due to its excellent clarity, dimensional stability, electrical insulation properties, and easy processing characteristics. GPPS is produced from styrene monomer through a polymerization process, where styrene molecules are chemically linked to form polystyrene chains. The production process is carefully controlled to achieve different molecular weights, flow properties, and mechanical characteristics required for specific applications. After polymerization, the material is processed into uniform pellets or granules that can be easily used in injection molding, extrusion, and thermoforming operations.

General Purpose Polystyrene grades include injection molding grades, extrusion grades, and high-clarity grades, each designed for specific industrial requirements. Injection molding GPPS grades are commonly used for rigid transparent products such as disposable containers, laboratory equipment, household items, and packaging components, while extrusion grades are suitable for sheets, films, and thermoformed products. High transparency GPPS grades are preferred for applications requiring excellent optical appearance, including display products, food packaging, and consumer goods. GPPS offers outstanding surface gloss, low moisture absorption, good electrical resistance, lightweight structure, and excellent processability, making it a cost-effective choice for manufacturers.

The product is widely used in packaging, electronics, construction, medical, household, and industrial sectors. Its advantages include high transparency, rigidity, precise molding performance, chemical resistance, and stable quality during processing. GPPS granules are available in different melt flow rates (MFR), viscosity levels, and specifications to meet various production technologies and end-use applications, providing manufacturers with a reliable polymer solution for high-quality finished products.

Technical Specification of General Purpose Polystyrene (GPPS)

Specification	Typical Value
Product Name	General Purpose Polystyrene (GPPS)
Polymer Type	Thermoplastic Polystyrene
Appearance	Transparent White Pellets
Production Process	Styrene Polymerization
Density	1.04 – 1.06 g/cm³
Melt Flow Rate (MFR)	1 – 20 g/10 min (Depending on Grade)
Tensile Strength	35 – 55 MPa
Flexural Strength	70 – 100 MPa
Vicat Softening Temperature	85 – 105 °C
Transparency	High Optical Clarity
Processing Methods	Injection Molding, Extrusion, Thermoforming
Packaging	25 kg Bags, Jumbo Bags, Bulk Shipment

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FAQ General Purpose Polystyrene (GPPS)

GPPS is produced through the polymerization of styrene monomer under controlled chemical conditions. The process creates polystyrene chains with specific molecular characteristics, followed by pelletizing and quality control to provide consistent granules for industrial processing.

General Purpose Polystyrene is widely used for transparent packaging, disposable food containers, laboratory products, electronic components, household goods, display items, and thermoformed sheets due to its clarity, rigidity, and easy processing properties.

Commercial GPPS grades include injection molding grades for rigid molded products, extrusion grades for sheets and profiles, and high-clarity grades for applications requiring excellent transparency and surface appearance.

GPPS provides excellent transparency, high rigidity, dimensional stability, electrical insulation, low moisture absorption, good surface finish, and cost-effective processing performance compared with many other thermoplastics.

GPPS granules are commonly supplied in 25 kg polyethylene bags, palletized bags, jumbo bags, or bulk containers depending on customer requirements, transportation conditions, and export specifications.

Through Irancorps, international buyers can connect with evaluated Iranian manufacturers and exporters of GPPS and receive support for finding reliable suppliers, comparing offers, checking product specifications, and managing business communication with trusted Iranian producers.