What Should Be Noted When Using EAA Emulsion?

EAA emulsion (ethylene-acrylic acid copolymer) has good adhesion to polar materials such as metal and glass, and also has good adhesion to PE, polyurethane, and nylon, and has certain heat sealing properties, and can be used in water-based heat sealing adhesives.

Ethylene acrylic acid (EAA) is abbreviated as EAA. The melting point, rigidity and yield tensile strength of EAA emulsion are lower than those of polyethylene, and decrease with the increase of AA content, while the air permeability and environmental stress cracking resistance increase with the increase of AA content; it has good transparency, wear resistance, low temperature resistance, adhesion and colorability.

EAA emulsion is formed by free radical polymerization of ethylene and acrylic acid under high pressure and high temperature. It is used as film packaging and coating, and can also be used as a film adhesive for bonding rubber, plastic, metal and glass.

Application areas of EAA emulsion:

Used as composite film, toothpaste tube, wire and cable sheath, protective clothing, large antenna, explosion-proof glass, carpet lining, etc.

EAA emulsion is a polymer with high thermoplasticity and adhesion. Due to the presence of carboxyl groups and the effect of hydrogen bonds, the crystallization of the polymer is suppressed and the linearity of the main chain is destroyed, thereby improving the transparency and toughness of EAA and reducing the melting point and softening point. When the MI is the same, as the AA content increases, the transparency, toughness, adhesion and environmental stress cracking resistance of the EAA emulsion will increase; on the contrary, its rigidity, moisture permeability, creep resistance and chemical resistance will be better. When the AA content is the same, as the MI increases, the adhesion and processing properties of EAA will be better; on the contrary, its toughness and environmental stress cracking resistance will increase.

EAA emulsion has good compatibility with a variety of fillers, pigments, dyes, etc. However, when blended or co-extruded with amines, epoxides and metal hydroxides, oxides, carbonates, etc. If these substances decompose, it will cause problems such as polymer cross-linking, and you need to pay attention when using it.