Laboratory extruders are compact, high-precision extrusion machines designed for material research, small-batch production, and educational use. Compared to industrial extruders, they feature flexible modular design, precise control systems, and lower throughput, making them ideal for polymer modification, masterbatch development, reactive extrusion, and pilot-scale testing. With screw diameters typically ranging from 12 to 45 mm and output capacities of 0.25–150 kg/h, lab extruders provide critical data for process optimization, scale-up validation, and innovative material development across plastics, pharmaceuticals, and food industries.

This article explains how to choose suitable carrier resins for color masterbatches in TPE (thermoplastic elastomer) pelletizing based on application scenarios. It emphasizes key selection criteria such as compatibility, processing temperature, performance impact, and cost-efficiency. Specific carriers like LDPE, PP, PS, EVA, and SEBS are recommended for different TPE uses—ranging from toys and automotive parts to medical tubing and food-grade products. It also highlights considerations for pigment-carrier matching, masterbatch concentration, and processing optimization.

This article outlines four key considerations when selecting plastic additives. First, the compatibility between additives and polymers is crucial to ensure uniform mixing and long-term stability. Second, additives must withstand the processing conditions, especially high temperatures. Third, the synergy or antagonism between multiple additives can significantly impact performance. Finally, the intended use of the plastic product—such as food packaging or medical applications—places strict requirements on the toxicity and extractability of the additives.

This article provides a comprehensive overview of screw maintenance for extruders. It covers key topics such as screw cleaning methods, including the use of purging compounds and HDPE as a cost-effective alternative, as well as the causes and effects of screw wear. It also explains the procedures for removing screws, the materials used in screw manufacturing, and how to select the right materials based on processing needs. Additionally, a Q&A section addresses common concerns, such as increasing production output, screw design, and wear prevention. This guide is valuable for anyone involved in plastic extrusion or recycling operations.

This article explains the structure and function of extruder screws, which are divided into three main zones: the feeding zone, where solid resin is transported and preheated; the compression zone, where the resin melts through external heating and shear heat; and the metering zone, which ensures uniform extrusion. Additionally, the article discusses darmage(a mixing section), screw elements used in twin-screw extruders, the compression ratio affecting resin flow and pressure, and the barrel, which houses the screw and facilitates heat transfer. Proper screw design is essential for optimizing resin plasticization, mixing, and extrusion efficiency.

Poor discharge or blockage in a plastic pelletizer machine head may be caused by foreign materials, heater malfunctions, or improper temperature settings. Solutions include inspecting and replacing the heater, cleaning the extrusion system, and adjusting temperature settings as needed.

This article outlines 12 common shoe sole materials, comparing their durability, flexibility, breathability, and resistance to wear, water, and temperature. Each material has unique advantages suited for different shoe types and uses.

This article discusses the selection principles and specific applications of plastic additives. Additives should be chosen based on the intended purpose, ensuring they can fully perform their functions and meet the required standards and performance specifications. Various types of additives and their applications are listed, including toughening, reinforcing, flame retardant, antistatic, conductive, magnetic, thermal conductivity, heat resistance, transparency, wear resistance, insulation, and barrier properties. The selectivity of additives for different resins is also addressed, highlighting the effectiveness of red phosphorus, nitrogen-based flame retardants, nucleating agents, and glass fiber heat resistance modifiers for specific resins. For example, red phosphorus is effective for PA, PBT, and PET, while nucleating agents work well for copolymer polypropylene.

When TPE strands are cut into pellets, the problem of the extruder die head breaking as soon as it is pulled out can be located and solved from the following four aspects:1. Adjust the plasticizing temperature 2. Adjustment of oil filling amount 3. Filler adjustment 4. SEBS content adjustment

Process parameters affecting internal mixer mixing 1. Mixing procedure and order of adding materials 2. Mixing temperature 3. Mixing time 4. Rotor speed