Applicable Base Polymer Properties
The amorphous polyolefin based hot melts are widely used in such areas as packaging, non-wovens, and product assembly. They are suitable for adhering paper or foil to a variety of substrates. The products are tailored copolymers of ethylene, propylene or 1-butene and exhibit a range of melt viscosities, needle penetrations and softening points, surface tackiness, and open times. Incorporation of 1-butene gives copolymer products long open times and low softening points of around 107°C.
The tensile strength varies proportionally with the softness of the polymers. The compatibility of blends with tackifiers and waxes is directly related to the chemical nature of the copolymer and its molecular weight.