FIELD: pulp-and-paper industry, in particular, paper including wide elongated impermeable member, and method for manufacture of such paper, and documents produced thereon.
SUBSTANCE: method involves the stages involving introducing elongated flexible impermeable member into contact with two groups of portions which are raised from substrate surface relative to adjacent zones. First group of raised portions have width transverse to feeding direction of machine which is smaller than width of elongated member, and second group of raised portions have width at least equal to width of elongated member. Method further involves depositing filaments onto substrate for producing of paper, with endes of elongated member resting upon second group of raised portions during manufacturing of paper. Method allows paper to be manufactured, said paper including wide impermeable protective member with isolated transparent or semi-transparent windows, said windows having strictly delimited edges and being uniformly defined.
EFFECT: increased extent of protection of documents produced from this paper.
12 cl, 6 dwg, 5 ex
