S57 is a vinyl chloride homopolymer resin distinguished by its low molecular weight and exceptional flow characteristics, produced through suspension polymerization. This resin is designed specifically for applications requiring efficient processing capabilities due to its low melt viscosity, making it well-suited for rigid product formulations.
Product Description
- Low Molecular Weight: Facilitates enhanced flow characteristics, making the resin easier to process and mold.
- Manufacturing Technique: Produced by suspension polymerization, a method that ensures uniform particle size and high purity of the resin.
Applications
S57 is engineered for a variety of rigid applications:
- Injection Molding: Perfect for creating pipe fittings and rigid PVC parts that require precise dimensional stability and durability.
- Sheet Extrusion: Used in the production of rigid films and sheets, both compact and foamed, applicable in various industrial and commercial uses.
Key Properties and Specifications
- K-Value: Between 56.1 and 57.8 (ASTM), indicating the resin’s flow properties and degree of polymerization.
- Inherent Viscosity: Ranges from 0.665 to 0.72 (B.F.O/ASTM D 1243.79), reflecting its molecular weight and ease of processing.
- Particle Size Distribution:
- % Retained on Mesh 40: <1E-06%, highlighting extremely fine particles.
- % Retained on Mesh 200: >=85%, demonstrating that a large proportion of the resin is fine enough for uniform melting and processing.
- Porosity: 0.05-0.2 m^2/g (DIN 53417/1), impacting the resin’s absorption and interaction with plasticizers and other additives.
- Volatile Matter (Heat Loss): Maximum <=0.4% (B.F.G), signifying low levels of impurities or moisture, crucial for maintaining processing quality and resin properties.
- Bulk Density (Apparent): 0.5-0.62 g/cc (ASTM D 1898.69), important for handling, storage, and metering during processing.
- Dark Resin Content: Less than 30 particles per 10 grams (B.F.G), indicating high purity and cleanliness of the resin, essential for aesthetic quality in end products.
Packing and Storage
- Packaging: Typically supplied in a form that supports its flow characteristics and protects it from contamination.
- Storage Recommendations: Should be stored in a cool, dry place away from direct sunlight and moisture to preserve its physical and chemical properties over time.
S57 offers manufacturers a reliable option for a vinyl chloride homopolymer resin that combines low molecular weight with high performance, particularly effective for precise and high-quality injection molding and sheet extrusion processes. This resin is tailored to meet the demands of rigid applications, ensuring high durability and optimal processing efficiency.
PVC S57
- Injection Molding
- Sheet Extrusion