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Master Bond adhesives
Covestro DUREFLEX® A4700 TPU
Categories: Polymer; Thermoplastic; Polyurethane, TP

Material Notes: Characterization: Dureflex A4700 is a self-priming, polyether based, low modulus aliphatic thermoplastic polyurethane film/sheet product.

Properties / Applications: Dureflex A4700 was developed as part of a series of optical grade adhesive films. Dureflex A4700 was specifically developed for the lamination of optically transparent glass-clad polycarbonate. Dureflex A4700 is also used in acrylic composites CAB and other compatible thermoplastics. Dureflex A4700 can be supplied from 15 mils to 50 mils (.38 to 1.27 mm) with a specially developed film finish to allow for evacuation of trapped air during press or autoclave bonding. Dureflex A4700 is supplied with a protective polyethylene interleaf to prevent film-to-film roll blocking, and should be incorporated where a “primerless ” lamination is required. As with any product, use of Dureflex A4700 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.

Information provided by Covestro

Available Properties
  • Specific Gravity, ASTM D792
  • Hardness, Shore A, ASTM D2240
  • Tensile Strength, Ultimate, ASTM D882, MD/CD Ave
  • 100% Modulus, ASTM D882, MD/CD Ave
  • 300% Modulus, ASTM D882, MD/CD Ave
  • Tear Strength, ASTM D1004, MD/CD Ave
  • Softening Point, ASTM E2347-004
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Manufacturer Notes:
Covestro Deutschland AG, Bayer MaterialScience

Category Notes

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