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How to solve the dark specks and spots on TPU extrudate or TPU injection products
Jun 25 , 2023
What cause dark specks and spots on TPU extrudate or TPU injection products ① Contamination in the raw material: TPU is sensitive to contamination from impurities present in the raw material. This can lead to dark specks and spots in the extruded or injection-molded product. ② Screw and barrel contamination: If the screw and barrel are not cleaned properly, leftover resin from previous r...
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What defect caused by the long molding cycle time of soft TPU and how to avoid it
Aug 25 , 2023
The molding cycle time refers to the total time it takes for a complete injection molding cycle, including the stages of filling, cooling, and ejection. The molding cycle time of TPU (Thermoplastic Polyurethane) can have an influence on the properties of the final injection products. A long molding cycle time for soft TPU (Thermoplastic Polyurethane) products can potentially cause various defects....
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Why the lower TPU hardness the lower processing temperature
Sep 08 , 2023
The processing temperature of TPU is influenced by several factors, including its hardness. Generally, lower hardness TPU grades have a lower processing temperature compared to higher hardness grades. This relationship can be attributed to the following reasons: Molecular Structure: The hardness of TPU is determined by the ratio of rigid segments (hard segments) to flexible segments (soft segments...
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What is GRS certification
Oct 13 , 2023
GRS (Global Recycled Standard) is a globally recognized certification and labeling system for products made from recycled materials. The purpose of GRS is to promote the use of recycled materials, reduce the environmental impact of production, and provide transparency and assurance to consumers. By using products certified under the Global Recycled Standard, consumers can make more informed choice...
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The proportion of MDI influence the embrittlement performance of TPU at low temperatures
Nov 03 , 2023
MDI is one of the key components used in the production of TPUs. It serves as the isocyanate component, reacting with polyols to form the polyurethane segments of TPU. The selection of MDI type and the ratio of MDI to polyols can affect the physical properties and performance characteristics of the TPU, including its low-temperature behavior. TPU formulated with a higher proportion of MDI generall...
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How to packing E-TPU (Expanded Thermoplastic Polyurethane) granules can maximize the space utilization of container
Mar 01 , 2024
To maximize the space utilization and load as much E-TPU granule as possible in a 40" container, you can consider the following packing method: Use bulk bags (also known as FIBCs or super sacks): These large, flexible bags are commonly used for storing and transporting granular materials. Opt for high-capacity bulk bags that can hold a significant amount of E-TPU granule. Optimize bag size: Choose...
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why stable MFI is matter for TPU process
Mar 29 , 2024
Stable MFI or MI (Melt Flow Index) is an important factor in TPU (Thermoplastic Polyurethane) processing for several reasons: Process Consistency: MFI represents the flowability of the TPU material during processing. Stable MFI ensures consistent and predictable flow behavior, which is crucial for achieving uniform product quality and avoiding defects or variations in the final product. Ease of Pr...
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The influence factor of TPU process temperature
Apr 10 , 2024
The process temperature or extrusion temperature of TPU (Thermoplastic Polyurethane) can be influenced by several factors. Here are some key factors that can impact the TPU process temperature or extrusion temperature: TPU Grade: Different grades of TPU may have varying recommended process temperatures. Different grades may with distinct different thermodynamic characteristics. It is important to ...
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What is the key factors impacting the process pressure of TPU extrusion
Jun 17 , 2024
Some of the key factors impacting the process pressure of TPU extrusion are: Material Properties: The viscosity of the TPU material affects the extrusion pressure. Higher viscosity materials require higher pressure to extrude effectively. Factors like TPU grade, molecular weight, and additives can affect the material's melt viscosity and flow characteristics, thus influencing the extrusion pressur...
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