Monthly Archives: February 2019

  • Why You Should Refrigerate Solder Paste

    Solder paste is a vital material used in the manufacturing
    of printed circuit boards. It connects surface mount components to pads on the
    board through its sticky consistency once heated and forms a bond and an
    electrical connection. Inside the paste, there are ingredients that serve as
    activators that essentially remove oxides from the surface being soldered and
    the powdered solder alloy itself once heated.

    As the paste ages, however, its physical characteristics and overall effectiveness will change. Most solder pastes typically have a shelf life of around 3-6 months when refrigerated. This makes refrigeration the best and most effective way to get the longest use out of your solder paste. Once your paste reaches room temperature or higher, the six month shelf life can shorten to as little as 24 hours. Generally speaking, the ideal temperature for most pastes is between 0 and 10 degrees Celsius. Temperatures warmer than this could separate the flux medium from the body of the paste, possibly causing printing defects and errors.

    Kester EP256 Solder Paste

    While it is not recommended to leave solder paste in warm environments, freezing solder paste is also not recommended. Placing solder paste in too low of temperatures could result in the precipitation of the activators. There are many different solder paste options, but whichever paste you buy should be stored immediately as soon as it arrives.

    Think of your solder paste as a carton of milk. You wouldn’t want to leave the milk sitting out in your car for hours before you finally arrive home from the grocery store. Solder paste generally comes in a package that has insulating materials or ice packs, but it is still recommended that you choose next day shipping and move it to a refrigerated environment as soon as possible.

    Solder paste is designed to have quick reactions at higher temperatures but remain fairly dormant at lower temperatures. This is why it is extremely important to keep the paste at the aforementioned temperature range until removing for use. GoKimco offers a wide variety of different solder pastes, but each product includes details on the recommended handling and shelf life.  

    Kester R276 Solder Paste, 35gr Syringe

  • Product Feature: Loctite EQ CL32 LED Spot System

    One of the most recent products added to the GoKimco website is the Loctite EQ CL32 LED Spot 405nm. With new light intensities of up to 3 w/cm2, this system is three times greater than its predecessor and revolutionizes portable LED curing methods for all industries that need to achieve immediate operating strength on a variety of materials.

    Loctite EQ CL32

    This lightweight LED light source is small enough to be used in crowded and hard-to-reach areas while minimizing operator fatigue, yet powerful enough to take care of all the curing needs your industry might require. Depending on your project and preferences, you can either power the system through a wall outlet if you wish to use it as a mount or you can take advantage of its 3-hour battery life if you wish to use it as a handheld unit.

    Besides being small and powerful, the Loctite EQ CL32 also boasts a number of other benefits. For starters, its instant on/off makes the system easy and quick to use. Its long focus length allows the user to direct precisely into small joints or crowded areas with fast curing speeds. It also consumes little power and releases no IR emissions, which reduces the chance for thermal damage and warp.

    How does this light work? Click here for a visual explanation on how to use the LED spot system, but for now, we’ll go over the basics. For common applications, just apply a light cure instant adhesive to the parts that you wish to be mated, potted or sealed. GoKimco also offers a number of light cure adhesives, all of which are formulated for rapid light cure.

    You can still adjust parts once the adhesive is applied without breaking the initial bond since the adhesive will not become activated until the light source is used. This allows you to ensure that your parts are in the desired place before using the using the Loctite EQ CL32 to adhere them together. Then use the instant on button and either the 365nm or 405nm LED heads to complete the curing process.

    It’s that simple! The Loctite EQ CL32 is perfect for prototyping, scale up, or full production environments so you won’t want to miss out on this newly featured product.

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