The criterion for testing water soluble film
fast dissolving type water-soluble plastic film is in accordance with the following standard test: < br /> a: appearance: basic appearance smooth level off, without obvious concave and convex marks, bubbles, impurities, corrugated, defects such as cracks.
Among them: < br /> 1, impurities, 0 or less in diameter.
Number 8 mm, 25 or less per square metre.
< br /> 2, bubble, diameter of 1 or less.
0 mm, number 25 or less per square metre.
< br /> 3, wrinkles, allowing a small amount.
< br /> 4, transverse uniformity, 2 mm or less.
< br /> 2, size deviation: + / - 5 mm width, thickness of plus or minus 0.
005 mm, plus or minus 1 m in length.
< br /> 3, of the same film joints: 1/100 m or less.
Four, technical indicators: < br /> < br /> 1, the tensile strength & gt;
< br /> 2, elongation at break & gt;
< br /> 3, right Angle tearing force & gt;
80 kn / m。
< br /> 5, water-soluble can: begin to dissolve & lt;
< br /> completely dissolved & lt;
After 20 minutes of completely dissolved without filiform flake impurities (
Measure the water temperature is 25 ℃ 6 cm x 6 cm sheet test)
< br /> 6, storage period: 2 years.
Storage of the goods does not be affected with damp be affected with damp circumstances)
【 Note: because of the humidity and temperature variations caused by water soluble film hardness change belongs to the normal situation, the manufacturer not take the quality exception handling. 】