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    With over 50 years of industry-leading experience, Chem-Trend has a history of delivering the highest-quality products and service. Visit us at... Read More »


  • What are the respective advantages and disadvantages of the different types of purging compounds?

    Abrasive purging compounds can be economical to utilize, and are efficient for certain situations but they can damage worm and cylinders. As... Read More »

  • Can purge compounds be reground and added to the plastic part as recycle content?

    The addition of purge compound into the regrind stream for part production is not recommended as it will affect the physical properties of the... Read More »

  • Can purge compounds be reground and reused for future purging?

    A purge compound that is contaminated with color, black specks or dissimilar materials has already been saturated or partially saturated with... Read More »

  • How do you remove material prone to thermal cracking and encrustation from equipment?

    Some polymers tend to produce more thermal cracking products and encrustations than others. Special purging compounds have been developed for... Read More »

  • Can purging compounds be used in hot runner systems?

    Not all purging compounds are safe for use in hot runner systems; however there are some purging compounds which have been developed to be hot... Read More »

  • Can machine parameters influence the cleaning result of a purge compound?

    Various factors like temperature and application time can have an influence on the cleaning result and need to be taken into consideration when... Read More »

  • Are there differences between purge compounds for extrusion and purge compounds for injection molding operation?

    Purge compounds for extrusion have a lower MFI compare to those used in injection molding. Injection molding purge compounds need to be able to... Read More »

  • Are universal purging compounds available that can work with all applications and polymers?

    Thermoplastic processing is done in many different ways with many different polymers at a wide range of temperatures. Universal purging compound... Read More »

  • What positive effects on production do purging compounds provide?

    A well-selected purging compound that matches with your process and polymer can provide extensive production benefits such as: time savings (... Read More »