Surface Energy Of Acrylic Sheet

Spreading a b c where.

Surface energy of acrylic sheet.

Some sources quote the critical surface tension in units of mn m which is equivalent to surface energy. Although the tensile strength of acrylite ff sheet is 10 000 psi 69 mpa at room temperature astm d 638 stress crazing can be caused by continuous loads below this value. 300 lse low surface energy acrylic 300 f bonds well to lse surfaces outstanding adhesion to low surface energy plastics powder coated paints and lightly oiled metals good chemical and humidity resistance. For glazing applications continuously imposed design loads should not exceed 750 psi 5 2 mpa at 73 f 23 c.

Different forms of surface preparation can increase the surface energy which increases wetting. Acrylic acid content increases the surface energy threshold adhesion energy and adhesion hysteresis of psa lns. Historically low surface energy plastics required some type of surface treatment such as abrasion flame corona plasma chemical treatment or primers prior to bonding. Surface energy values usually have the units of mj m 2.

Acrylic acid aa was co polymerized with 2 ethyl hexyl acrylate 2 eha and 1 6 hexane diol diacrylate hdda to create psa lns. The first table shows values for low and high surface energy solid materials whilst the second table. The dynamics of wetting watch video are described below. The surface energy of the plastic either allows or prevents wetting the surface.

If the material surface energy is too high then the paint ink or coating may bleed or be difficult to control. The surface energy values of some typical materials are shown in the two tables.