A-A-2546C
2.3 Adhesive coating. Each sheet of paper in the pad
shall have a coating of repositionable, pressure-sensitive adhesive located on
the back side of the sheet. The adhesive coating shall be applied flush to one
horizontal edge of the sheet, shall extend the entire width of the sheet, and
shall have a minimum width of 6.4 mm (1/4 inch). It shall not be possible to
easily rub any adhesive from the back of the sheet with a finger.
2.4 Construction. A minimum average of 100 sheets of paper shall be
assembled in the form of a pad. No individual pad shall contain less than 97
sheets. The pad paper and a backing sheet shall be securely fastened together
by means of the repositionable, pressure-sensitive adhesive coating.
2.5 Performance.
2.5.1 The sheets of pad paper shall not exhibit feathering, spreading,
skipping, beading, visible discontinuities or fading of ink when written on
with a felt tip, permanent marker or ball point pen. The sheets of pad paper
shall release easily from the pad without leaving any trace of adhesive on the
underlying sheet.
2.5.2 Fiber pull. The sheets of pad paper, when adhered to a sheet of bond or
xerographic dual purpose paper shall not pull paper fibers from the bond paper
when tested as specified in the following method. Place a sheet of bond or
xerographic dual purpose paper on a hard, flat surface. Randomly select two
sheets. Separately place the two test sheets of the pad paper on the paper and
adhere each by rolling once in their lengthwise direction (i.e., once back and
once forth) using the roller described in ASTM D 3330. On one of the test
sheets, write over the adhesive strip area with a sharp No. 2 pencil using
enough pressure to indent the paper. Remove each test sheet from the bond
paper. Evidence of paper fibers on the adhesive strip shall be considered as
failure to meet the requirement.
2.5.3 Initial flagging. The sheets of pad paper, when adhered to a sheet of
bond or Xerographic dual purpose paper shall remain attached to the bond paper
when tested as specified in the following method. Adhere a sheet of the pad
paper to the bond paper using the method described in 2.5.2. Hold the edges of
the specimen so they do not lift off the paper before the timer is started.
Roll the combined sample around a cylindrical object 5.1 cm (2 inches) in
diameter with the horizontal edge of the sheet perpendicular to the axis of the
cylinder. See Figure 1. Mark the points at which the specimen separates from
the paper after thirty seconds have elapsed. The sheet of the pad paper shall
not show a total flagging length in excess of 25% of the length of the
horizontal edge, thirty seconds after the combined sample is mounted on the
cylindrical object. Flagging is defined as the length, if any, of the adhesive
end of the sheet which peels away from the bond paper due to stresses from
being rolled up. Total flagging is the sum of flagging at both ends. See Table
II.
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