GPPS 1028
| Product Name | General Purpose Polystyrene / Crystal PS (GPPS 1028) |
|---|---|
| Product Group / Family | General Purpose Polystyrene — Extrusion & Injection Molding Grade |
| Melt Flow Index (MFI) | 2.4 g/10min (@ 200°C / 5.0 kg) |
| Vicat Softening Point | 102 °C (@ 120°C/h, 1.0 kg / 10 N) |
| Flexural Modulus | 3200 MPa |
| Key Characteristics | High Heat Resistance | High Melt Strength | Ultra-High Molecular Weight | Food-Grade Certified |
| Physical Appearance | Transparent Cylindrical Granules / Pellets |
| HS Code | 39031910 — General Purpose Polystyrene (GPPS) |
| Packaging Type | 25 kg Bags, Shrink-Wrapped Wooden Pallets (55 Bags / 1,375 kg Net Weight) |
| Manufacturer | Petro Pak Petrochemical Company |
| Supplier | MizanPetroGas Company |
| Contact | 09155118932 (Direct WhatsApp Contact) |
- Description
Description
General Purpose Polystyrene / Crystal PS (GPPS 1028)
High-molecular-weight extrusion grade | Glass-like transparency | Superior thermal resistance | Food-Contact Approved — Producer: Petro Pak Petrochemical | Supplier: MizanPetroGas Company
Product Introduction
General Purpose Polystyrene Grade GPPS 1028 (commercially known as Crystal Polystyrene) is an amorphous thermoplastic resin manufactured via continuous bulk (mass) polymerization of high-purity styrene monomer. Specifically engineered for sheet and profile extrusion as well as high-precision injection molding, GPPS 1028 features an exceptional balance of mechanical rigidity and thermal endurance, marked by a Vicat Softening Point of 102°C, a Flexural Modulus of 3200 MPa, and a Melt Flow Index (MFI) of 2.4 g/10min.
Supplied as high-purity clear cylindrical pellets, GPPS 1028 is distributed by MizanPetroGas Company under HS Code 39031910, adhering to rigorous international quality benchmarks and comprehensive food-contact safety standards.
MizanPetroGas | 09155118932 | sell@mizanpetrogas.com
Pricing and Purchasing GPPS 1028
Commercial pricing for Crystal Polystyrene GPPS 1028 fluctuates in response to international styrene monomer (SM) benchmarks, crude oil movements, currency adjustments, and regional petrochemical capacity. Freight logistics, packaging configurations, and export schedules are customized per client requirements. For official spot quotations, technical datasheets, and direct contract supply, contact the commercial department at MizanPetroGas.
Technical Profile and Structural Properties
General Purpose Polystyrene (GPPS) is an amorphous, hard, and transparent polymer. Grade 1028’s controlled Melt Flow Index (2.4 g/10min @ 200°C/5kg) places it in the high-viscosity, high-molecular-weight class, providing exceptional melt strength essential for stabilizing heavy sheet extrusion webs without sag or caliper variation.
The resin’s elevated Vicat Softening Point (102°C) classifies it as a High-Heat Grade, maintaining dimensional accuracy and structural rigidity when exposed to elevated processing or operating temperatures. Furthermore, GPPS 1028 complies with international food-contact safety frameworks, ensuring zero hazardous substance migration in disposable food packaging.
Key Features
- High Molecular Weight & Melt Elasticity
- High-Heat Thermal Resistance (Vicat 102°C)
- High Melt Strength for Sheet Extrusion
- Glass-Like Optical Transparency (>90% Light Transmission)
- High Structural Rigidity (Flexural Modulus 3200 MPa)
- Controlled Melt Rheology for Extrusion & Injection
- Food-Grade Certified (FDA 21 CFR & EU 10/2011)
- Superior Dimensional Stability & Low Mold Shrinkage
- Excellent Printability and Color Masterbatch Dispersion
- Fast Cycle Times & Easy Processing
- High Economic Cost-to-Performance Ratio
- Compatible with UV Stabilizers & Anti-Static Additives
Key Advantages
Glass-Like Clarity
Light transmittance exceeding 90% with low haze, delivering high-end aesthetic appeal for transparent consumer goods and display packaging.
Elevated Thermal Endurance
A Vicat point of 102°C guarantees thermal stability during secondary thermoforming and prevents warping when in contact with warm foods.
Robust Melt Strength
High molecular weight delivers exceptional web stability during sheet extrusion, reducing sheet breakage and gauge variance on high-speed lines.
Mechanical Hardness & Rigidity
Flexural modulus of 3200 MPa provides high load-bearing capacity and stiffness, allowing wall-thickness down-gauging in molded parts.
Certified Food Safety
Fully compliant with international food hygiene regulations for single-use serviceware, dairy containers, and food presentation trays.
Cost-Effective Processing
Low raw-material density and broad thermal processing windows ensure rapid cycle times, lower power draw, and high economic margins.
Applications and Target Industries
Sheet & Film Extrusion
Extruded XPS Insulation Sheets
Primary feedstock for extruded polystyrene (XPS) foam boards with uniform closed-cell structure and superior thermal insulation.
Embossed & Textured Sheets
Extrusion of textured and patterned sheets for shower screens, interior partitions, ceiling diffusers, and luxury box packaging.
Clear Thermoforming Sheets
Extrusion of rigid transparent rollstock for blister packaging, clamshell containers, and secondary display lids.
Food Packaging & Disposable Serviceware
Disposable Food Containers
Manufacturing of hygienic, crystal-clear drinking cups, salad bowls, portion pots, and takeaway container lids.
Crystal Cutlery & Utensils
High-rigidity single-use forks, spoons, knives, and drink stirrers with clean snap resistance and brilliant shine.
Dairy & Deli Packaging
Transparent tubs and display containers for yogurt, spreadable cheeses, confectionery, and fresh deli products.
Precision Injection Molding & Consumer Goods
Transparent Technical Moldings
Production of high-clarity industrial components, instrument covers, display bezels, and laboratory Petri dishes.
Home Appliances & Housewares
Refrigerator crisper trays, transparent drawers, blender measurement cups, and stationary organization accessories.
Decorative & Display Items
Point-of-sale display stands, cosmetic compact housings, photo frames, and artificial crystal decorative items.
Target Customer Segments
XPS Foam Board Manufacturers
Producers of rigid extruded polystyrene thermal insulation panels for construction and cold-storage facilities.
Rigid Packaging & Thermoformers
Converters producing thermoformed food containers, transparent clamshells, and blister packaging webs.
Injection Molding Plants
Facilities manufacturing consumer housewares, clear appliance components, and single-use food serviceware.
Commercial Sheet Extruders
Manufacturers of flat, embossed, and prismatic polystyrene sheets for architectural glazing and lighting panels.
Cosmetic & Luxury Packaging Brands
Molders producing thick-walled, glass-mimicking cosmetic jars, caps, and perfume secondary packaging.
Polymer Distributors & Traders
Wholesale distribution networks supplying general-purpose and technical polystyrene resins to regional plastics processors.
Optical Purity & Color Formulations
GPPS 1028 offers natural glass-like clarity with light transmittance exceeding 90% and minimal haze. This intrinsic optical transmission makes it a competitive alternative to higher-cost transparent polymers (such as PMMA and PC) in applications where impact exposure is moderate.
Processing Benefit: The natural optical base readily accepts transparent color tints, fluorescent dyes, and opaque masterbatches with excellent dispersion and zero color streaking.
High-Heat Thermal Resistance Profile
With a Vicat softening temperature of 102°C, GPPS 1028 withstands operational heat without undergoing premature relaxation or warpage. This characteristic ensures wide safety margins during high-temperature post-extrusion cooling and makes the grade suitable for containers used with warm foodstuffs.
⚠️ Flammability Notice: Standard unmodified polystyrene is a combustible polymer. For building insulation or specialized electronic housings requiring regulatory fire compliance, appropriate flame-retardant (FR) masterbatches must be incorporated during extrusion, or flame-retardant HIPS grades should be selected.
Typical Technical Specifications (Typical Properties)
| No. | Property | Typical Value | Unit | Test Method |
|---|---|---|---|---|
| 1 | Melt Flow Index (MFI @ 200°C, 5 kg) | 2.4 | g/10min | ASTM D1238 |
| 2 | Vicat Softening Temperature (120°C/h, 10 N) | 102 | °C | ASTM D1525 / ISO 306 |
| 3 | Flexural Modulus | 3200 | MPa | ASTM D790 / ISO 178 |
| 4 | Tensile Strength @ Yield | 48 – 52 | MPa | ASTM D638 / ISO 527-2 |
| 5 | Tensile Elongation @ Break | 2 – 3 | % | ASTM D638 / ISO 527-2 |
| 6 | Density @ 23°C | 1.04 | g/cm³ | ASTM D792 / ISO 1183 |
| 7 | Izod Impact Strength (Notched @ 23°C) | 18 – 22 | J/m | ASTM D256 / ISO 180 |
| 8 | Glass Transition Temperature (Tg) | 95 – 100 | °C | DSC (ISO 11357-2) |
| 9 | Light Transmittance | 88 – 92 | % | ASTM D1003 |
| 10 | Injection Processing Melt Temperature | 180 – 260 | °C | — |
| 11 | Extrusion Processing Melt Temperature | 200 – 230 | °C | — |
| 12 | Physical Form / Appearance | Clear Cylindrical Pellets | — | Visual |
Technical Property Interpretations
- MFI 2.4 g/10min: Controlled flow rate providing high melt cohesion and draw stability for sheet lines.
- Vicat Point 102°C: High-heat resistance mitigating distortion in hot-fill packaging and warm thermoforming cycles.
- Flexural Modulus 3200 MPa: Outstanding structural stiffness preventing part deflection under mechanical load.
- Density 1.04 g/cm³: Favorable volumetric yield compared to PET (1.38 g/cm³) and PC (1.20 g/cm³).
- Light Transmittance 88–92%: Crystal clarity suitable for high-visibility transparent packaging.
- Food-Contact Approval: Certified compliance with FDA 21 CFR 177.1640 and EU No 10/2011 standards.
Performance Profile Rating
| Optical Transparency & Clarity | Excellent | |
| Thermal Resistance (Vicat) | Very Good | |
| Extrusion Melt Strength | Excellent | |
| Rigidity & Flexural Modulus | Very Good | |
| Extrusion Processability | Very Good | |
| Dimensional Stability | Excellent | |
| Impact Resistance | Moderate (HIPS needed for high impact) | |
| Base Flame Retardancy | Base Resin (Requires FR Additives) | |
| Economic Efficiency | Very High | |
| XPS Foam Suitability | Highly Suitable | |
| Food Packaging Suitability | Ideal (Food-Grade) | |
| Recyclability | 100% Recyclable |
Processing Guidelines — Extrusion & Injection
- Pre-Drying: Recommended drying at 70–80°C for 2 hours (residual moisture $\leq$ 0.1%) to prevent surface splay marks.
- Extruder Temperature Profile: 200°C to 230°C from feed throat to sheet die, adjusted for screw compression ratio.
- Injection Cylinder Temperature: 180°C to 260°C; maintain mold temperature at 20–60°C for optical gloss and rapid solidification.
- Injection Pressure: 60 to 120 MPa based on wall thickness and runner configuration.
- Screw Speed (RPM): Moderate backpressure and controlled screw RPM prevent shear degradation and air entrapment.
- Masterbatch Addition: Colorants, anti-static agents, and UV stabilizers disperse effectively at 1–4% dosage rates.
Packaging, Storage & Handling
- Packaging: 25 kg multi-layer polyethylene bags; shrink-wrapped on standard pallets (55 bags / 1,375 kg net weight).
- Physical Form: Transparent cylindrical pellets (HS Code: 39031910).
- Storage Conditions: Store in a cool, clean, and dry indoor warehouse away from direct sunlight, rain, and ambient moisture.
- Storage Temperature: Maintain ambient warehouse temperature below 40°C to prevent pellet blocking.
- Safety & Fire Protection: Keep isolated from ignition sources, hot surfaces, and strong oxidizing materials.
- Shelf Life: 24 months from production date when maintained in original sealed packaging.
Order GPPS 1028 — Request Official Quotation
Contact MizanPetroGas for current spot pricing, inventory status, technical datasheets, and direct factory supply.
09155118932 — Direct WhatsApp Contact
Sales Email: sell@mizanpetrogas.com | Ex-Warehouse Delivery + Nationwide & Export Shipping
