Water Based Polyurethane Waterproof Coating

Water based polyurethane waterproof coating

test item

 index

 test method

 Original coating

  appearance

   viscous liquid

        visual inspection

   paint film appearance

Neat and smooth, no obvious concave-convex, seediness, color change, trace of scratching 

         visual inspection

        adhesive force

 No coming off of the film of coatings

no obvious fall off by finger scratch on the broken surface caused by cutting after being hit by 50KG twice 

           hardness

        ≥3H

3 H pencil hardness

      acid resistance

No abnormalities

boiled in 12% HCL solution for 12  minutes

  boiling water resistance

No coming off of the film of coatings

adhesive force test after being boiled for 100 hours

    corrosion resistance

                No fall off

boiled for 100 hours at 90℃ in 5% saline

    anti-sticking property

                      fine

No burned or stick (when cooking the rice, keep the temperature at 105 ℃ for 10 minutes, the rice can be poured out easily and the inner pot is clean and non-stick )

         heat resistance

No coming off of the film of coatings

observed in normal temperature after being heated in 260℃ oven for 100 hours

  abrasive resistance

Test object: electric cooker inner  with R bottom

≥500 times, no obvious coating fall off or worn-out(less than two 1mm grinding cracks )

Coating wear-resisting equipment, 3M 7447B scouring pad and 3KG weight are adopted for test. Back and forth counted as a time. Turn over the object every 500 times

abrasive resistance

Test object: aluminum alloy plate

≥1000 times, no obvious coating fall off or worn-out(less than two 1mm grinding cracks )

Coating wear-resisting equipment, 3M 7447B scouring pad and 3KG weight are adopted for test. Back and forth counted as a time. Turn over the object every 500 times

      hygienic index

      international standard

Approved by ROHS,FDA,REACH