Strength of polyurethane froth is dictated by dropping a metallic circle on a section of froth continued a flat surface from a stature of 500 mm and discovering the tallness to which it bounce back subsequent to striking the surface of froth.
The AsianÂ ball strength analyzer for polyurethane froth comprises of a level flat stage, a vertical acrylic tube in which the circle is dropped, and a hand worked game plan to discharge the circle from a foreordained stature.
The stage on which the test example is kept likewise shapes the base of the hardware. It has four leveling screws to make it level.
The acrylic tube is held over the base with the assistance of a holding square, which can be moved vertically to alter the stature of the tube to empower test examples of distinctive thicknesses to be tried. This change is completed with the assistance of a screw so that the stature of the tube can be absolutely set.
The tube is held solidly after change so it doesn't shake amid the test.
The scale utilized for estimation of the tallness of bounce back is checked on the external surface of the acrylic tube. It extends from 10% to 90% of the dropping stature.
The metallic circle is kept in a roundabout opening in the metallic front of the acrylic tube. It can be discharge by squeezing a spring-stacked bolster, which is so outlined as to discharge the circle without conferring any beginning straight or rotational development to it.
the gear is done in blue metallic painting and splendid chrome plating to give it a consumption safe completion.
ASTM d 3574 "1986 : standard strategies for testing adaptable cell materials "sections,
reinforced and shaped urethane froth
ISO 8307 "1990 : adaptable cell polymeric materials "determination of flexibility