This article provides a practical guide to solving common problems in plastic pelletizing, including long pellets, fused pellets, black spots, and discoloration. It explains the root causes of each issue—such as unstable strand feeding, insufficient cooling, equipment contamination, improper temperature control, and poor mixing. The article also offers effective solutions, including optimizing cooling systems, maintaining cutter blades, improving material handling, thoroughly cleaning equipment, and adjusting extrusion temperatures and screw configurations. By controlling every step from raw material to finished pellets, manufacturers can enhance pellet quality, reduce waste, and improve production efficiency.

Whether fillers in TPE pelletizing require surface modification depends on their activity, surface area, and loading level. High-activity or high-surface-area fillers (like nano silica or fine calcium carbonate) and high-performance or high-filling applications must be pre-treated with coupling agents to improve compatibility and prevent agglomeration. For low-activity fillers, low filling ratios, or low-cost applications, pre-modification is usually unnecessary and can be compensated by compatibilizers and lubricants. Proper modification ensures better dispersion, stability, and product quality in TPE processing.

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.

Masterbatch is a concentrated blend of colorants, special effect pigments, and functional additives dispersed in a carrier resin. Supplied mainly as pellets, it’s added during plastic manufacturing to provide consistent color, unique finishes, and improved material properties. Masterbatch is widely used in processes like injection molding, extrusion, and blow molding across industries from packaging to automotive. It offers benefits over liquid colors and powders by ensuring cleaner production, precise dosing, and reduced waste. It can also be tailored for recycled polymers and combined with additives like UV stabilizers for enhanced performance. The production process involves blending, extrusion, cooling, and pelletizing to create ready-to-use masterbatch pellets.

This article explains how plastics processors can improve purging efficiency by combining high-quality purging compounds with well-managed processes. It highlights common mistakes—like using cheap virgin resin, choosing purging compounds only by price, and ignoring supplier instructions—that often reduce cleaning effectiveness. The article also emphasizes the importance of consistent training, process monitoring, and choosing the right supplier to reduce downtime, extend equipment life, and improve profitability in extrusion and injection molding operations.

Although recycled plastics are seen as a key solution to pollution and circular economy goals, they face limited adoption due to high costs, weak policies, technical bottlenecks, market resistance, and low consumer acceptance. Breaking through requires stronger regulations, technological innovation, supply chain coordination, and consumer incentives to shift from "concept popularity" to real market demand.

This article explains the advantages of side vacuum exhaust systems in plastic extrusion. Unlike traditional top-mounted systems, side vacuum systems prevent material overflow by positioning the vacuum port laterally, improving process stability and reducing maintenance. It also clarifies that a stable negative pressure—not higher vacuum strength—is key to effective degassing. Factors such as temperature control, screw speed, and screw design also significantly impact performance. The side vacuum system is especially suitable for high-volatility materials where reliability is critical.

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in order to meet the needs of different uses, chemical or physical methods are used to change some properties of plastic products to achieve the intended purpose, which is plastic modification.

Q1.The length is larger than the normal pelletA: Cause of occurrence:The main reasons are: starting the machine, pulling or breaking the strip, the direction of the strip is not straight, the strip is not properly soaked in water, and the cutting tool of the granulator is worn or has gaps.Main solut