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  1. TechQA

    PMMA Defects

    Dear all, Recently, i am compounding some transparent colored PMMA for my customer. The application use is for optical lens, the molded part is very simple with rectangular in shape. However, during my QC checks, the powder(fines) content is controled at very little %, black spot too. However...
  2. TechQA

    EVA processing help

    Dear all, My customer is facing some streaking problems with injection moulding of this EVA material for a shoe sole. The molded part is somewhat curvy and with thick and thin areas, this part is used for medical purposes to help flat footed people. The EVA used is from Taiwan Formosa Taisox...
  3. TechQA

    Composition of Purge Compound

    Hi all, Anyone have any idea what's the composition of purging compounds used to purge extrusion and injection machines that can effectively remove the carbon and dirt within the screw ? As you know, these purge compounds are quite expensive and i'm trying to find out the concept of this...

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