GMN Automotive’s new scuff resistant coatings

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By Richard Smylie | Dec 18, 2017
GMN10 scuff-resistant coatings

To maintain the beauty and functional integrity of your metal automotive trim ornamentation, including sill plates, liftgates, center stacks, steering wheel badges and/or door trim, it is essential to use coatings and/or screen printing inks having superior scuff resistance.

Currently, there are many scratch, mar, and scuff tests that are known throughout the industry and are employed by accredited testing laboratories. While these tests accurately gauge some real world environmental forces to which your ornamentation application will be subjected, they fall short of capturing the effects of one significant key real world destructive force: scuffing.

Therefore, to ensure that our customer’s products could maintain their beauty and functionality throughout their life cycle, GMN Automotive’s in-house chemists decided to formulate a proprietary anti-scuff family of custom coatings and inks identified as GMN10. Coatings and inks infused with GMN10 will withstand the real-world harmful scuffing forces that automotive trim components encounter regularly throughout their lifetime to preserve the original aesthetic and functional needs of the component for a prolonged period. GMN10 underwent a variety of qualitative and quantitative tests, such as subjecting GMN10 coatings/inks to testing protocols that use steel wool as the abrasive media at selected weights, in order to prove the superior scuff-resistant properties of this additive.

GMN Automotive’s new GMN10 scuff-resistant coatings are a significant improvement to our existing coating chemistry. Adding GMN10 to coatings and inks has no effect on the solvent resistance, stain resistance, or formability of your construction. This breakthrough coating technology can be applied to either aluminum or stainless steel constructions with low to high gloss without having any aesthetic effects, while maintaining its performance benefits in a wide variety of severe environments, from high heat to extreme cold. Our test results attained above using the above-mentioned steel wool test method showed that the average product will scuff when subjected to two to three double rubs of 000 steel wool pads when under a downward pressure of 3000 grams. Whereas coatings and inks with GMN’s new GMN10 additive could exceed 100 double rubs under the same conditions.

During our battery of tests, we were able to validate that the GMN10 meets the industry standard specifications for the following:

  • Has no detectable effect on accelerated xenon-arc exposure, which helps to predict the fading of color or gloss level over time.
  • Adhesion:

            - Humidity resistance (GM4465P) – a test where the sample is exposed to 100% relative humidity at 38°C (100.4°F) for 
               a specified time.

            - Impact cross-hatch tape pull (ASTM D-3281) – a one-pound ball or cone is dropped at a specified vertical distance to 
               an area that had been cut with a knife or crosshatch tool. The sample is tested with adhesive tape for any coating 

  • Scratch and mar:

            - Taber abrasion (ASTM D4060-1) – test samples are placed on a Taber rotating plate with a grit wheel of a specified 
               grade and are abraded for a number of cycle turns with a given weight applied on each grinding wheel. The samples 
               are graded by number of cycles for wear through point of the coating.

            - A new type of scratch and mar test using steel wool – this test uses 000 steel wool that is rubbed back and forth with 
               the weight of 3,000 grams applied. The end point is measured by the number of “double rubs” the sample could 
               sustain before the coating began to wear through.

  • Solvent resistance (GM 9509P) – this is usually tested by using a solvent that is specified by the paint supplier (commonly MEK). A soft solvent-saturated cloth is rubbed back and forth on the sample a number of times using the firm downward pressure of a gloved finger. The number of “double rubs” specified for a “pass” varies, but it typically ranges from 10 to 50 rubs.
  • Improved film properties including:

            - High durability in all environments of radiation and moisture
            - Increased resistance to abrasion, scratching, and marring
            - Improved adhesion and film flexibility
            - Better impact resistance  

GMN Automotive has been supplying decorative metal trim ornamentation to the automotive industry for decades, which provided GMN with the insights, knowledge, and experience necessary to develop our GMN10 chemistry. GMN10 prolongs the integrity of your coating or ink, enabling your trim applications to visually maintain a mar-free appearance for a significantly longer period of time, and in doings so it prolongs the ornament’s functional life span as well.

If you are interested in learning more about our new improved scuff resistant coatings, please contact us here.