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KUNSUN 40ft full container loading of TPU Resin S-190AL to Vietnam
Jun 25 , 2021
Today, KUNSUN 40ft full container loading of Thermoplastic Polyurethane TPU Resin S-190AL to Vietnam. In this shipment, 40ft full container loaded with 20 pallets and 25 tons TPU granule.Thermoplastic polyurethane S-190AL is polyester based transparent TPU plastic particles with density of1.21±0.02 g/cm3, tensile strength of 300 kgf/cm2, elongation at break of 550%, hardness of 91A±2 A.S-190AL is ...
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Classification and application of TPU over-moulding
Jul 07 , 2021
TPU over-moulding mainly divided into bond with metal and bond with plastic.TPU bond with metal is to encapsulate a layer of soft plastic on the metal surface. It make the surface of the metal features with anti-slip, shock-absorbing, anti-corrosion. There are generally four over-moulding methods in TPU overmoulding metal.1. Block over-mouldingTPU block over-moulding has defect of poor bonding and...
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Causes and solutions of dents in injection molded parts
Jul 16 , 2021
Dents in injection molded parts are all defects caused by insufficient melt replenishment when the thicker parts are cooled. The shrinkage of plastic parts (surface shrinkage and internal shrinkage) The main reasons for such defects are improper control of molding conditions, mold defects, raw materials that do not meet the molding requirements, and unreasonable design of the shape of the plastic ...
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What is bio-based TPU
Jul 23 , 2021
Bio-based materials refer to biomass materials made from renewable natural resources (such as corn, cassava, wheat, potato, cellulose, palm oil, etc.) bio-based compounds, bioplastics, wood-plastic composite materials which made by biological, chemical, and physical methods are environmentally friendly, renewable and biodegradable. Bio-based material is widely used to produce shoes, bags, clothing...
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What causes cracking in TPU plastic injection molded parts and how to fix it
Jul 30 , 2021
Cracks are a fatal defect of TPU products, it usually happens to be hairy cracks on the surface of the product. It easily happened in the sharp edges and corners. It is harmful for products usage when the invisible cracks occur in the injection parts,The main reasons that cause cracks during production are as follows: 1 Difficult to demold 2 Overfilling 3 Mold temperature is too low 4 Defects in p...
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Causes and treatment methods of warpage in Plastic Injection Molding
Aug 13 , 2021
Warpage is the injection product defects that parts deviates from the shape accuracy requirements of the part. It is one of the common and difficult solved defects in injection mold design and injection production.Causes of warpageWarpage is caused by uneven stress and shrinkage during the products injection process. Die Adhesion, insufficient cooling, inadequate shape and strength of the part, po...
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Sticking problems in thermoplastic elastomer TPE TPR TPU TPV materials injection molding
Aug 20 , 2021
Sticking is a common problem in the injection molding process of thermoplastic elastomer TPE/TPR/TPU/TPV. Sticking problem is quite common when the hardness is relatively low, such as TPE/TPR/TPU is lower than 60A and TPV is lower than 40A. There are two main parts that occur mold sticking problem. 1. Thermoplastic elastomer TPE/TPR/TPU/TPV sticking in the main runnerBecause the pressure in the ma...
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How to deal with the slippage of the screw barrel in TPU injection molding process
Aug 27 , 2021
There are many reasons that cause the slippage of the screw barrel. For example, the abrasion of the screw and barrel. The compression ratio of the injection molding machine screw, if the feeding section is too short and the compression ratio is too small will led to the conveying capacity decrease and the screw slip. The one-way valve (check valve) malfunction can also lead the screw slip. In add...
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The processing technic of TPU tube and TPU cushion extrusion procession
Sep 03 , 2021
1. The Pre-Processing of TPU granules If the humidity of the TPU material is too high, it will cause small bubbles or silver streaks in the TPU products and the surface of the TPU extrusion products is unsmooth and brightness. We recommend that the humidity of the pellet material should be under 005% to ensure trouble-free surface molding products. The TPU granules will absorbed the moisture from ...
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