Densified tactile imaging paper

Paper making and fiber liberation – Processes and products – Multi-layer waterlaid webs or sheets

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162141, 162146, 1621574, 162149, 162129, 162130, 162132, 1563082, 156324, 1563096, 428535, 4285375, 434113, D21H 1300, D21H 1310, D21H 2732, B32B 2900

Patent

active

051183900

ABSTRACT:
There is disclosed a tactile imaging paper comprising a tactile sheet and a backing sheet laminated together. The tactile sheet is a cellulosic sheet formed from a highly dilute furnish of from 30% to 60% chemically modified high alpha pulp, 35% to 70% solftwood pulp (or a mixture of softwood pulp and hardwood pulp with the hardwood pulp comprising up to 50% of the mixture), and 0.5% to 6% polyvinyl alcohol fiber. The tactile sheet is formed from the furnish without any wet pressing of the tactile sheet. Once the tactile sheet is dry, it is dry calendered to a density of from 0.3 to 0.9 grams per cubic centimeter. Moreover, the tactile sheet has a porosity of greater than 1000 centimeters per minute. The tactile sheet has a basis weight from 75 to 200 grams per square meter and with a laminated backing sheet the tactile imaging paper has a basis weight of about 190 gsm.

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