| 摘要 |
<p>A pad of paper sheets is constructed so that individual sheets may be removed from the pad without the individual sheets having any aggressively tacky or repositionably tacky coatings on exposed surfaces of the sheets after removal. There is no need for padding compounds or coatings on exterior edges or sides of the pads. A process for forming such a pad of sheets which can be separated into individual sheets having no aggressively or repositionably tacky surfaces comprising the steps of: (a) applying a coating of adhesive to a surface of a first sheet of paper, causing a first bond strength between said adhesive and said surface, and leaving an unbonded surface of adhesive exposed away from said paper, (b) for a measurable period of time allowing said adhesive to alter its physical properties so that its tackiness on its unbonded surface decreases, (c) contacting a second sheet of paper to said unbonded surface to bond said unbonded surface to said second sheet of paper, the bond between said second sheet of paper and the adhesive having a bond strength which is at least 10 % lower than the bond strength between said adhesive and said first sheet of paper, (d) repeating steps (a), (b) and (c) on said second sheet of paper to create a stack of sheets which are individually separable from each other.</p> |
