A-A-2370 Pad, Floor Polishing Machine (Thin)This commercial item description covers two types of thin, floor maintenance pads used for polishing, buffing, scrubbing, and stripping floors. The round, thin floor pads shall be suitable for mounting on power-driven, rotary-disc type floor maintenance machines, operating in a speed range between 150 and 350 rpm. The rectangular floor pads are for mounting on the oscillating type floor maintenance machines. The floor pads are intended for heavy duty floor care maintenance machines. The floor pads are intended for heavy duty floor care maintenance and shall be suitable for use on various type floors.

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A-A-2370

All sizes of the pads shall be as specified within a tolerance of plus or minus 3.2 mm (1/8 inch).

Salient characteristics.

Design. The floor pads shall be suitably designed and fabricated for use with either rotary disc or oscillating electric floor machines. The floor pads shall be resilient so that the entire surface area of the pad contacts the floor. The pads shall be uniformly impregnated with abrasive particles within plus or minus 15 percent uniformity. Any concentrations or blotches of

Abrasive particles within the pad, when viewed toward a bright light source, shall be tested specifically for the 15 percent uniformity requirement.

Material. The materials used in the manufacture of floor maintenance pad shall not support the growth of bacteria and must be of such denier, density, strength quality, and workmanship to produce cohesive pad, uniform in structure, and reversible with equal performance on both sides. The materials shall be either nylon or a blend of nylon and polyester and suitable for the intended use in accordance with good commercial practice. Abrasive particles shall be made of either natural or synthetic abrasives. The bonding adhesives shall be such that the pads shall not disintegrate in water, detergent solutions, oil, wax, or other material normally encountered in floor maintenance operations.

Type I, nylon floor pads. Type I, nylon floor pads, shall be made of one piece unified mat. The materials of the pads shall be formed or bonded into a solid disc. Pads of spirally wound ribbons of interlocking fibers are not acceptable.

Class 1. The abrasive content for the type I, class 1 buffing and polishing pads shall be no more than 40 percent by weight. One hundred percent of the total abrasive particles shall pass through a 200 mesh screen. A minimum of 90 percent of the abrasive particles shall pass through a 270 mesh screen.

Class 2. The abrasive content for the type I, class 2 scrubbing pads shall be no more than 60 percent by weight. One hundred percent of the total abrasive particles shall pass through a 150 mesh screen. A minimum of 75 percent of the particles shall pass through a 200 mesh screen. A minimum of 95 percent of the remaining particles shall pass through a 270 mesh screen.

Class 3. The abrasive content for the type I, class 3 stripping pads shall more than 65 percent by weight. One hundred percent of the total abrasive particles shall pass through a 100 mesh screen.

A minimum of 65 percent of me particles shall pass through a 150 mesh screen. A minimum 45 percent of the remaining particles shall pass through a 150 mesh screen.