Inks for Flexible Substrates Films

Surface tension of film Accudyne level pens or solutions are used to estimate the surface tension of treated films. A targeted range of 38-42 dynes cm is specified for most printing appHcations. The surface tension of most aqueous styrene acryhc based pigmented inks are greater than 38-42 dynes cm .  

Water resistance, 24 h, immersion at 25 °C A Crinkle test is performed. Two surfaces of ink are rubbed ink-to-ink for 10 cycles. A subjective comparison is made between a test sample and a standard. 

LDPE Low density polyethylene (i.e. fruit and vegetable produce bags) 

MDPE Medium density polyethylene (i.e. department store merchandize bags) HDPE High density polyethylene (i.e. grocery item bags) 

PP-PVDC Poly(vinylidene chloride)-coated polypropylene 

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