When the material moves forward along the screw, it experiences changes in temperature, pressure, viscosity, etc. This change is not the same throughout the entire length of the screw. According to the changing characteristics of the material, the screw can be divided into a feeding section, a compression section and a homoge0nization section.

TPU has good processing properties such as injection, extrusion, calendering, blow molding, and molding. It is used in the three major shoemaking projects of soles, uppers, and fitting, and is favored by the majority of shoemakers. As can be seen from the picture below, TPU covers almost the entire range of shoe manufacturing processes.

For a twin-screw extruder, the screw is mainly divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section. Threaded components mainly include conveying, melting, shearing, material mixing, residence time control and other functions. The threaded elements of the twin-screw extruder are combined in a "building block" manner. In practice, they can be adjusted according to different production needs. Therefore, screw combination is the key to customizing the twin-screw extrusion process.

The amount of color masterbatch added to the final resin is generally 2%-5%. If the color masterbatch is mixed and added correctly, the content of the carrier resin in the final mixture will account for 1%-3% or more. This makes it the most abundant additive in the additive family, so some details should be paid attention to when selecting the carrier resin. For example, users' requirements for color, color stability, environmental requirements, and the role of masterbatch in the final product, etc., make the formulation of masterbatch increasingly complex.

White masterbatch seems strange to many people but is so familiar. Almost everyone has used it. It has bright and eye-catching color, high tinting strength, good dispersion, high concentration, good whiteness and strong hiding power. , with the characteristics of good migration resistance and heat resistance, it is widely used in injection molding, blow molding, wire drawing, casting, extrusion, film blowing, foaming, sheet, pipe, pelletizing, hollow, EVA, bottle blowing, Sheet materials, household appliances, toys, packaging materials, wires and cables, plastic bags, automobiles, building materials, sports and leisure products, packaging bags, packaging bottles and other plastic product industries.

The specific structure of plastic twin-screw extruders is based on the actual twin-screw extruders, and specially designed twin-screw extruders can be divided into meshing types and non-meshing types according to the relative positions of the two screws. Plastic twin-screw extruders can arrange and combine thread elements and barrel elements of various geometric shapes. Based on experience-theory-practice-test, the design can be optimized for different mixing requirements to adapt to the needs of different process formulas, making the co-rotating twin-screw extruder highly adaptable.

As an environmentally friendly mechanical production equipment, plastic pelletizers produce useful granular plastics, but for these plastic production machinery and equipment, necessary maintenance is still required, especially in daily life. Some maintenance before and after production can maintain the normal operation of the equipment and extend its service life, which is also very good for users.

Application Classification and Characteristics of Plastic Recycling Pelletizer Crushed material recycling and granulation production line: Film material two-stage single-screw granulation production line: Nylon waste filament and fishing net single screw recycling and pelletizing production line:

The six basic characteristics of flame retardant PP:1. Mechanical properties 2. Physical performance 3. Chemical stability 4. Thermal performance 5. Weathering resistance 6. Electrical performance

When we really want the additive to be evenly distributed throughout the polymer matrix, we would claim that we need to improve dispersion. Or we design the screw to have a distribution mixing element, but the material is easy to agglomerate and needs to be dispersed first before being distributed.