HS121 is a high-performance expandable polystyrene (EPS) grade from Tabriz Petrochemical Company, formulated specifically for applications that do not require fire-retardant properties. This product is part of the TPC Performance expandable polystyrene products range and is distinguished by its ability to be pre-expanded and molded into low-density foam blocks used predominantly for insulation and packaging applications.
 
Product Description
Type: Expandable Polystyrene (EPS)
Features: HS121 consists of spherical polystyrene beads that contain pentane as the expansion agent, enabling effective pre-expansion.
Formulation: This grade is specially formulated to achieve high strength, low-density foam without lumps during the pre-expansion process.
 
Typical Applications
Thermal Insulation Boards for Construction: Used in construction applications where flame resistance is not a requirement.
Packaging Blanks: Ideal for creating packaging materials that require cushioning properties and lightweight.
 
Key Properties
Density: Typically around 14 kg/m^3, but can vary based on application and equipment (SUNPOR 7.2.6).
Bead Size: 1.8-2.5 mm, ensuring uniformity and consistency in product application (SUNPOR 7.2.5).
K-Value: Indicates the thermal conductivity of the material, crucial for insulation applications.
Pentane Content: 5.2%, which acts as a blowing agent to help expand the beads during processing (SUNPOR 7.2.2).
Residual Monomer Level: Up to 500 ppm, indicating the purity of the material and its safety in terms of chemical content (SUNPOR 7.2.1).
 
Processing and Handling
Packaging and Storage: HS121 is shipped in octabins that are not weather- or waterproof, hence they must be stored indoors and not be exposed to outdoor conditions. The material should be stored below 20°C and processed within one month to maintain optimal properties.
Pre-expansion: Can be achieved using discontinuously operating pre-expanders to reach densities of approximately 14 kg/m^3. Lower densities can be achieved through double pre-expansion or optimized machines.
Molding: Can be processed in industry-standard molding machines. Adjustments in steaming settings might be required to achieve desired properties. If a regenerative agent is used, its density should closely match the pre-expansion density to prevent segregation during production.
 
Summary
HS121 from Tabriz Petrochemical is engineered to provide excellent structural properties and ease of processing for applications requiring thermal insulation and protective packaging. Its ability to form low-density, high-strength foam makes it an ideal choice for a wide range of industrial applications. The specific requirements for handling, storage, and processing ensure that HS121 maintains its quality and performance from production to application.