Eco-Friendly Medical Grade TPU Film/TPU Hot Melt Adhesive Film/tpu Static Window Film
Two-way stretch polypropylene film is formed by polypropylene granules by co-extrusion sheets, then through vertical and horizontal directions of stretching.Because the tensile molecular orientation, so the film physical stability, mechanical strength, good air tightness, high transparency and gloss, tough wear-resisting, is currently the most widely used printing film.Generally use thickness is 20 ~ 40 microns, and the most widely used for 20 microns.Its main drawback is that poor heat sealing, so generally used as the outer membrane of composite membrane, such as with polyethylene film composite after moisture resistance, transparency, strength, stiffness and printing are ideal, suitable for holding food drying.As a result of the two-way stretch polypropylene film surface for non-polar, high crystallinity, surface free energy is low, therefore, the printing performance is poorer, to the poor adhesion of inks and adhesives, the need for surface treatment before printing and composite.
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