NUCREL™ resins were obtained when ethylene is copolymerized with acrylic (AA) or methacrylic acid (MAA) to obtain an acid copolymer (EAA and/or EMAA respectively), in which the acid content may vary from 2 – 19 wt.%.
Those acid groups bring NUCREL™ resins a variety of special characteristics among which stand
- Excellent adhesion to metal
- Good oil, and chemical resistance
- Good hot tack strength
- Low seal initiation temperatures (SIT)
- Excellent seal through contamination
All these aspects make NUCREL™ a material of choice in extrusion coating, as well as a tie layer for bonding PE onto aluminum foil or metalized films and as a sealant for packaging films and coatings in applications like
- sauces, condiments, dressings, packaging
- and, for pharmaceutical and healthcare products packaging.
The acid groups and long-chain branches along with the structures of NUCREL™ resins allow these products to be used in several conversion processes such as
- Blown and cast films
- Extrusion coatings
The most popular NUCREL™ grades are
- NUCREL™ 0910HS and/or NUCREL™ 0609HS in extrusion coating and lamination and for bonding PE sealant onto aluminum foils and excellent chemical resistance to acids in aseptic bricks and stand-up pouches (SUP).
- NUCREL™ 3990 and/or NUCREL™ 30907 in extrusion coating and lamination to protect the aluminum foil from more aggressive acids, and as a sealant in a single dosing sachet like ketchup, mustard, and others.
- NUCREL™ 30707 in extrusion lamination to improve metal adhesion and protect the foil from the toothpaste components in toothpaste tubes.
- NUCREL™ EA was designed for blending into LDPE to increase the adhesion onto foil or metalized films, in cases where coextrusion is unavailable or in applications where the chemical resistance is not a priority.