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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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How we help customer to solve the fogging appearance in TPU injection products
Apr 22 , 2022
Customer description: compared with the test product, the bulk products is with fogging and poor transparency problem. Technician analyse: 1.Check the temperature of cooling water. Check the mold temperature. Check if the transparency of all the products is uniform. 2.Is the TPU material been fully dried 3.Is the production process of test product and bulk products same? 4.High temperature will be...
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What TPU test pieces consist of and what are they used for
May 13 , 2022
A TPU physical properties test pieces consist of abrasion test particles, crescent, dog bone, test coupons. Different part be used to do different properties test. The main physical properties of TPU are: hardness, tensile strength, 100% modulus, elongation at break, tear strength, compression set, resilience, abrasion, melt index, yellowing resistance, high/low temperature resistance, hydrolysis,...
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Why TPU Elastomer is an environmentally friendly plastic material
May 20 , 2022
Thermoplastic polyurethane TPU Elastomer is a non-toxic and odorless material. Some TPU series have passed medical certification and FDA certification, and can be implanted into the human body and contact with food. TPU plastic is recyclable and can be used in many industries. TPU resin can decompose after a certain period of time, and will not cause pollution to the environment. TPU does not cont...
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How KUNSUN company and KOSLEN TPU can benefit to their partners and customers
May 27 , 2022
Firstly. TPU is degradable and environmental friendly plastic material, it is widely used in different industry. TPU is environment-friendly materials and can pass almost all the Environmental Test such as Reach, Rohs, Phthalates,Halogen and so on. TPU is well known for it’s excellent abrasion resistance and great physics properties. Plus TPU has also widely be used in food contact and medical pro...
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TPU thermoplastic resins used in electronic products
Jun 02 , 2022
TPU particles is more and more often used in electronic products such as consumer electronic devices electronics housing and overmoulded plastic electronic parts, electronic devices parts. TPU thermoplastic resins permit greater soft touch, flexibility, strength, abrasion resistance and non-yellowing attributes to the electronic devices which experience wear and tear everyday。 Our advanced TPU mat...
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