Since its establishment, Simingrui has been dedicated to the production of EPP foam (Expanded Polypropylene) and EPP automotive components. Guided by the principles of “honesty as the foundation and service as the priority,” we have earned an excellent reputation in Qingdao, China. We warmly welcome you to contact us for more information.
EPP packaging materials have revolutionized sound insulation in modern buildings. Buildings located beside busy crossroads or commercial areas can now provide a quiet indoor environment, greatly benefiting people’s daily life and study. The key lies in using polypropylene - foamed EPP as the building material. Thanks to its low thermal conductivity, low water vapor permeability, high energy absorption, and compressibility, EPP is ideal for filling the gaps of uneven surfaces. It can be used as fillers in the expansion joints of roofs, walls, concrete slabs, and roads, as well as sealant retainers and weather strips. The board also promotes concrete solidification by reducing heat and moisture loss. Its low thermal conductivity makes it a perfect roofing cushion material for ordinary buildings, effectively reducing sound transmission in multi - storey structures.
Our research on polypropylene foaming dates back to 2007. After about eight years of in-depth exploration, we have studied various methods to enhance the melt strength of polypropylene, explored the chemical mechanisms involved, and successfully developed an effective, industrially viable, and stable method. As a new-generation foaming material that has emerged in recent years, EPP boasts excellent heat resistance, mechanical strength, biodegradability, and environmental adaptability.
The flow curves of EPP foamed composites maintain a similar shape at different temperatures. When the temperature rises from 160°C to 170°C at the same shear rate, the apparent viscosity of EPP material changes slightly. However, beyond 170°C, the apparent viscosity decreases significantly as the temperature increases. This is because higher temperatures enhance molecular mobility and improve the material’s flowability. Additionally, the non-Newtonian index of the material increases with temperature. At lower temperatures, molecular chains have limited mobility and entanglement-unraveling ability, resulting in a strong dependence of apparent viscosity on shear rate. As the temperature rises, the movement of macromolecular segments becomes easier, and the free volume within the composite increases, reducing the dependence of apparent viscosity on shear rate at high temperatures. Therefore, during mixing, we recommend starting with low-temperature and low-speed conditions and gradually increasing the temperature, which can prevent melt fracture caused by excessive shear rate during low - temperature processing and allow for a wider shear rate range during high - temperature processing to optimize rheological properties.
Simingrui is committed to providing high-quality EPP products and professional services. We look forward to working with you to create a better future.
Since its establishment, Simingrui has been dedicated to the production of EPP foam (Expanded Polypropylene) and EPP automotive components. Guided by the principles of “honesty as the foundation and service as the priority,” we have earned an excellent reputation in Qingdao, China. We warmly welcome you to contact us for more information.
EPP packaging materials have revolutionized sound insulation in modern buildings. Buildings located beside busy crossroads or commercial areas can now provide a quiet indoor environment, greatly benefiting people’s daily life and study. The key lies in using polypropylene - foamed EPP as the building material. Thanks to its low thermal conductivity, low water vapor permeability, high energy absorption, and compressibility, EPP is ideal for filling the gaps of uneven surfaces. It can be used as fillers in the expansion joints of roofs, walls, concrete slabs, and roads, as well as sealant retainers and weather strips. The board also promotes concrete solidification by reducing heat and moisture loss. Its low thermal conductivity makes it a perfect roofing cushion material for ordinary buildings, effectively reducing sound transmission in multi - storey structures.
Our research on polypropylene foaming dates back to 2007. After about eight years of in-depth exploration, we have studied various methods to enhance the melt strength of polypropylene, explored the chemical mechanisms involved, and successfully developed an effective, industrially viable, and stable method. As a new-generation foaming material that has emerged in recent years, EPP boasts excellent heat resistance, mechanical strength, biodegradability, and environmental adaptability.
The flow curves of EPP foamed composites maintain a similar shape at different temperatures. When the temperature rises from 160°C to 170°C at the same shear rate, the apparent viscosity of EPP material changes slightly. However, beyond 170°C, the apparent viscosity decreases significantly as the temperature increases. This is because higher temperatures enhance molecular mobility and improve the material’s flowability. Additionally, the non-Newtonian index of the material increases with temperature. At lower temperatures, molecular chains have limited mobility and entanglement-unraveling ability, resulting in a strong dependence of apparent viscosity on shear rate. As the temperature rises, the movement of macromolecular segments becomes easier, and the free volume within the composite increases, reducing the dependence of apparent viscosity on shear rate at high temperatures. Therefore, during mixing, we recommend starting with low-temperature and low-speed conditions and gradually increasing the temperature, which can prevent melt fracture caused by excessive shear rate during low - temperature processing and allow for a wider shear rate range during high - temperature processing to optimize rheological properties.
Simingrui is committed to providing high-quality EPP products and professional services. We look forward to working with you to create a better future.
