What factors affect TPE material transparency? TPE transparent material because want to high light transmittance, inevitable requirement strict material surface quality of the products, can not have any markings, porosity, white fog, dizzy, defects such as poor black spots, color and luster, thus in the injection molding process of TPE raw materials, equipment, tooling, and even the design of the product, will be very attention and strict even special request.

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　　We analyze the main points of TPE transparent material molding from raw material preparation, equipment requirements, injection molding process and product raw material processing：
First,Preparation and drying of TPE raw materials

　　As any impurity in TPE material may affect the transparency of the product, it is necessary to pay attention to the sealing in the process of storage, transportation and feeding to ensure that the TPE material is clean. Especially TPE raw materials contain water, heating will cause deterioration of raw materials, so must be dry. Dry hopper must be used when injection molding. Also note that in the drying process, the input of the best air should be filtered, dehumidification, in order to ensure that will not pollute the raw materials.
　　Second,Cleaning of barrel, screw and accessories

　　In order to prevent the contamination of TPE raw materials and the existence of old materials or impurities in the concave part of screw rod and accessories, especially the materials with poor thermal stability, screw rod cleaning agent should be used to clean each piece before use and after shutdown so that no impurities can be stuck to it.

　　Third,Note on injection molding process (including injection molding machine requirements)

　　In order to reduce the internal stress and surface quality defects, injection molding process should pay attention to the following aspects.
　　1.Special screw, with a separate temperature control nozzle injection molding machine should be selected;
　　2.The injection temperature should be higher if the material does not decompose;
　　3.Injection pressure: generally higher, to overcome the melt viscosity of the defect, but too high pressure will produce internal stress caused by demoulding difficult and deformation;
　　4.Injection speed: in the case of filling the mold, generally low, it is best to use a slow - slow - slow multistage injection;
　　5.Pressure holding time and molding cycle: under the condition that the product can be filled without any sag or air bubble; Should be as short as possible to minimize the molten material in the barrel of the residence time;
　　6.Screw speed and back pressure: under the premise of satisfying plasticizing quality, should be as low as possible to prevent the possibility of solution drop;
　　7.Die temperature: the cooling of products, the quality of the great impact, so the mold temperature must be able to accurately control the process, if possible, the mold temperature should be higher;
　　Fourth,Other aspects

　　As a result of the deterioration of the quality of the upper surface to prevent, general injection should be used as little as possible release agent; No more than 20% when using TPE feeding.