The criterion for testing water soluble film

by:POLYVA     2021-02-03

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; 25Mpa。 < br / > 2, elongation at break & gt; 180%. < br / > 3, right Angle tearing force & gt; 80 kn / m。 < br / > 5, water-soluble can: begin to dissolve & lt; 25 seconds. < 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. 】

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