Calendering

Abstract: Converting extensible papers, such as creped paper into compressible laminated paper structures having embossed protuberances adhesively joined at their distal surface to form a resulting paper structure. (1) Passing two continuous creped, or other wise extensible, paper sheets between separate embossing rolls to form identical raised patterns of discrete embossed protuberances thereon, (2) indexing and adhesively joining the distal surfaced of the protuberances so formed on the two sheets directly or with a third paper sheet interposed and (3) calendering the resulting laminated paper structure to improve its compressibility and handle. The adhesive is a 2-4 percent completely hydrolysed aqueous PVA soln.

Abstract: Process for preparing flexographic photopolymer elements by passing into the nip of a calender a photopolymer composition mass comprising elastomeric binder, monomeric compound, and photoinitiator and calendering the photopolymer composition either between (1) a support and multilayer cover element consisting essentially of a flexible cover film, optionally a flexible polymeric film, e.g., polyamide, and a layer of elastomeric composition which is photosensitive or becomes photosensitive during or after calendering, or between (2) two supports, one of which is removed prior to contact, e.g., by lamination or pressing, with the multilayer cover element. The flexographic photopolymer elements are useful for flexographic printing, e.g., dry-offset, letterpress printing.