CATEGORIES

    Powder Leak Detection

    Overview Knowledge Standards Terms
    Powder leak detection involves applying colored powder to the surface being inspected. The use of airflow or pressure changes causes the powder to accumulate and become visible at leakage points, thereby locating tiny pores. It is used to test the integrity of packaging, containers, or seals, commonly found in food and pharmaceutical packaging production lines.
    Selection
    Select the powder particle size based on the material of the tested object and precision requirements; match the color development sensitivity according to leakage standards; consider the impact of environmental humidity on powder adhesion; determine the level of automation based on production line speed; and verify equipment compatibility with reference to industry standards.
    type
    Coated Film thickness
    Voltage range

    Terms

    Low-voltage spark leak detector
    Coating Pinhole Leak Detector
    Phosphine gas leak detector
    Low Voltage Electric Spark Leak Detector
    High Voltage Electric Spark Leak Detector
    Electric spark leak detector
    Coating Pinhole Leak Detector
    Paint pinhole detector
    Pinhole Leak Detector
    Coating Spark Leak Detector

    Standards

    Active GB/T 21782.4-2025
    Coating powders—Part 4：Calculation of lower explosion limit
    Active GB/T 21782.3-2025
    Coating powders—Part 3：Determination of density by liquid displacement pycnometer
    Active GB/T 21782.2-2025
    Coating powders—Part 2：Determination of density by gas comparison pycnometer （referee method）
    Active GB/T 21782.1-2025
    Coating powders—Part 1: Determination of particle size distribution by sieving
    Active GB/T 21782.10-2025
    Coating powders—Part 10：Determination of deposition efficiency
    Active GB/T 21782.8-2025
    Coating powders—Part 8： Assessment of the storage stability of thermosetting powders
    Active GB/T 16995-1997
    Determination of gel time of thermosetting powder coatings at a given temperature
    Active GB/T 31473-2015
    Halogen gas leak detector
    Active GB/T 27809-2011
    Bisphenol A epoxy resins for thermosetting powder coatings
    Active GB/T 27808-2011
    Saturated polyester resins for thermosetting powder coatings
    Active GB/T 27807-2011
    Curing agent for polyester powder coatings
    Active GB/T 21782.12-2010
    Coating powders - Part 12：Determination of compatibility
    Active GB/T 21782.11-2010
    Coating powders - Part 11: Inclined-plane flow test
    Active GB/T 21782.9-2010
    Coating powders - Part 9：Sampling
    Active GB/T 21782.14-2010
    Coating powders - Part 14: Terminology

    Articles

    High-temperature viscometer measures the flow behavior of powder coatings in the molten state.
    This article introduces the use of a high-temperature viscometer to measure the flow behavior of powder coatings in their molten state. Powder coatings need to melt and flow before curing, a process that directly affects the smoothness and performance of the coating.
    Negative pressure method leak detector for testing vacuum packaging seal integrity
    The negative pressure leak detector evaluates the seal integrity of vacuum packaging by simulating a pressure differential environment. The instrument places the sample in a testing chamber and creates a vacuum to form negative pressure. If there is a leak, air or liquid will seep into the packaging, and the result is determined by observing pressure changes or the presence of bubbles.
    Karl Fischer Moisture Analyzer Determines Moisture Content in Powder Coatings
    This article introduces the method of determining the moisture content in powder coatings using a Karl Fischer moisture analyzer. Excessive moisture content in powder coatings can affect the quality of the coating, leading to issues such as bubbles. The Karl Fischer method measures moisture through the quantitative reaction of iodine and sulfur dioxide, which is divided into volumetric and coulometric methods.