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Classification of TPU air cushion and precautions in the production process
Dec 17 , 2021
At present, the most commonly plastic materials used for air cushions are polyurethane (PU), polyvinyl chloride (PVC), and thermoplastic polyurethane (TPU). The following mainly introduces the thermoplastic polyurethane stretch tube air cushion and the thermoplastic polyurethane oil-gas cushion. Thermoplastic polyurethane is a polymer material that has both rubber elastic properties and plastic pl...
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The function and production process of TPU air cushion shoe sole
Dec 31 , 2021
Air-cushioned shoes refer to an air storage cavity between the upper part of the sole and the lower part of the sole. The air storage cavity and the air inlet and outlet channels ventilate each other. The air inlet pores is vertically set at the rear end of the shoe. The air outlet pores are horizontally set on the upper part of the shoe sole. The main difference between air cushion shoes and ordi...
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How to set the production temperature of TPU injection products
Jan 07 , 2022
TPU thermoplastic is melted and flowed by heating then cooled to form a certain shape products. Sufficient pressure and good control of the flow state are the keys to produce uniform and excellent physical properties TPU injection products. Compared with PVC and ABS, TPU has a strict processing temperature range. If the temperature is too high, the viscosity will decrease, the resin melt will flow...
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TPU film used in medical, textile and shoe materials
Jan 14 , 2022
TPU films are mainly processed by extrusion, calendering and blow molding. TPU films with thicknesses ranging from several microns to several millimeters. TPU is a block copolymer consisting of alternating soft and hard segment sequences. It can adjust the ratio of soft and hard segments to achieve various hardness and elasticity changing. Therefore, polyurethane film has excellent tension strengt...
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2021 TPU price analysis and 2022 TPU price trending
Feb 18 , 2022
2021 will be an extraordinary year for the TPU industry. The TPU market price greatly raised as the skyrocketing price of raw materials and reaching the highest level in recent years. As below TPU market price chart of 2019-2021 show, the price fluctuation of TPU in 2021 is much larger than that in 2019 and 2020. At the beginning of 2021, with the large-scale implementation of the plastic restrict...
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what causes delamination in injection molding of tpu tpe compound
Feb 25 , 2022
Delamination is a injection products defect with the surface layers of a molded part peeled off which is also appear as fish-scaling. It may also be called lamination or layering. There are several reasons that cause the problem. It may be caused by material, processing, equipment and tooling. From a material standpoint, TPU material tend to be hygroscopic and moisture can hydrolyze TPU resins and...
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What can polyester polyol influence on physical properties of TPU
Mar 04 , 2022
Polyurethane is a general term for macromolecular compounds containing repeating carbamate groups (-NHCOO-) on the main chain. It is a polymer made from many kind of raw materials. By changing the type of polyurethane resin raw materials and the composition of the formula, the polyurethane resin properties can be greatly changed. The upstream raw materials of polyurethane include isoflurane (such ...
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Tips for defect-free injection molding of TPU
Mar 11 , 2022
Defect Remdedies Weld lines 1. Increase injection pressure 2. Increasement temperature or nozzle temperature 3. Increase sprue cross-sections or change it’s position 4. Optimize mold venting Fractures 1. Melt temperature is too low or too high 2. Reduce the proportion of recycled materials 3. Check material drying 4. Increase spruecross-s...
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Tips for defect-free extrusion of TPU
Mar 18 , 2022
Tips for defect-free extrusion of TPU Defect Remdedies Wrinkling 1. Increase die temperature and processing temperature 2. Reduce cooling water temperature 3. Check damage or impurities in the die weld lines 1. Increase Processing temperature 2. Increase Inner pressure of die head 3. Adjust Machine head position and temperature 4. Fully dry material Poor&nbs...
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