This article explains the common causes of hollow plastic pellets during the extrusion and pelletizing process, including high moisture content, improper temperature control, poor venting, and excessive cooling. It provides practical solutions such as proper raw material drying, optimized processing parameters, effective vacuum degassing, and regular equipment maintenance to improve pellet density and overall product quality.

This article discusses how to increase the output of a twin-screw extruder by optimizing the screw configuration. It explains how improvements in feeding efficiency, melting performance, side feeding design, mixing quality, and pressure build-up can enhance extrusion productivity. By adjusting the screw elements, such as conveying and kneading blocks, manufacturers can achieve higher throughput, better material dispersion, and more stable processing without changing the extruder size.

Breathable film masterbatch, produced mainly with polyethylene and additives through extrusion processes, is widely used in medical, packaging, and construction fields. With excellent breathability, stable quality, and bright colors, it plays a key role in manufacturing breathable films. Its production involves raw material mixing, melt blending, hot-melt extrusion, and cooling. As demand grows, factories are focusing on technological innovation, eco-friendly materials, and market expansion to enhance competitiveness.

This article explains why a universal screw design for plastic extrusion does not exist. Different polymers, such as HDPE and HIPS, have unique thermal, viscoelastic, density, and friction properties that directly affect melting, conveying, and throughput. These variations make it impossible for one screw geometry to efficiently process all materials, highlighting the need for polymer-specific screw designs to ensure optimal extrusion performance.

This article discusses how different TPE pelletizing methods, such as cold cutting and hot cutting, influence product quality. It highlights key extrusion parameters including melt temperature, pressure, and conveying speed, which directly affect pellet consistency and final product performance. Common pellet quality issues—such as black spots, discoloration, poor plasticization, or excess moisture—are analyzed with corresponding solutions to ensure stable extrusion, improved material properties, and higher product reliability.

This article analyzes the challenges of carbon black dispersion in black masterbatch production using twin screw extruders. Issues such as brittle or broken strands, hopper bridging, and uneven feeding are discussed. Key factors include dispersant ratio, temperature control, screw speed, and hopper design. Practical solutions—such as adjusting EVA wax content, optimizing temperature and screw configuration, adding vibration devices, and improving pre-dispersion of pigments—are proposed to enhance extrusion efficiency and ensure uniform masterbatch quality.

Glass fiber reinforced thermoplastic polyurethane (GF-TPU) combines TPU’s elasticity with the rigidity of short glass fibers, resulting in improved modulus, tensile strength, tear resistance, heat resistance, and dimensional stability while retaining flexibility. Research shows that fiber type, length, and content significantly influence dispersion, anisotropy, wear performance, and impact resistance. Optimal designs balance stiffness and toughness for specific applications. GF-TPU composites—processible by injection molding, extrusion, and calendering—are already used in automotive and industrial parts, with aramid fiber variants offering alternative reinforcement options.

This article explores the blending modification of TPU and PVC to improve material performance and reduce costs. PVC/TPU blends show excellent oil resistance and enhanced flame retardancy, although higher TPU content can reduce solvent resistance. Adding chlorinated polyethylene (CPE) as a third component further improves tear strength, thermal stability, and processability while helping maintain TPU’s flexibility at low temperatures. The blending ratio significantly affects mechanical and shape memory properties, with ratios like TPU/PVC 90/10 offering optimal performance. Combining TPU, PVC, and copolyester (COP) can also produce melt-processable rubber that combines toughness, cost efficiency, and low-temperature flexibility.

This article explores the blend modification of thermoplastic polyurethane (TPU) with polyvinyl chloride (PVC) to reduce costs and enhance performance. Blending TPU with PVC improves flame retardancy, hardness, processability, and weather resistance while lowering production expenses. Compatibility between TPU and PVC is driven by their similar polarity and molecular interactions, especially hydrogen bonding. Polyester-based TPU shows better compatibility than polyether-based TPU. Optimal TPU/PVC ratios balance tensile strength, tear strength, and hardness, with a 90/10 blend ratio often delivering the best mechanical properties. Overall, TPU/PVC blends combine cost-effectiveness with improved functional performance, making them suitable for applications like synthetic leather and flexible plastic products.

This article explains how blending SBS (styrene–butadiene–styrene) with PE (polyethylene) or PS (polystyrene) improves its properties. Adding PE enhances SBS’s abrasion resistance, hardness, weatherability, and tear strength, while maintaining good tensile strength and elongation. Blending with PS increases hardness and melt flow rate but may reduce tensile strength and elongation due to phase separation at higher PS content. Proper oil extension and using grafted compatibilizers can further improve processing and compatibility. These blending techniques help produce TPE/TPR materials and impact modifiers suitable for footwear, automotive parts, and plastic toughening applications.