Paper making and fiber liberation – Processes and products – Pore forming in situ
Patent
1991-01-15
1993-01-12
Chin, Peter
Paper making and fiber liberation
Processes and products
Pore forming in situ
162112, 162129, 162130, D21H 2738
Patent
active
051787296
ABSTRACT:
A foam-formed nonlaminated stratified paper tissue and method of making the same includes a first zone of foam-formed paper tissue formed from a furnish of hardwood fiber. A second zone of foam-formed paper tissue is formed from a furnish of softwood fiber. The second zone is formed unitary and entangled with the first zone to form a nonlaminated stratified paper tissue. A high softness integument is defined adjacent to an outer surface of the first zone and a substratum is defined adjacent to a surface of the second zone spaced away from the integument. The integument on the outer surface of the first zone includes an enriched region having a substantial purity of hardwood fiber and the substratum on the surface of the second zone includes an enriched region having a substantial purity of softwood fiber. The enriched region of substantially pure hardwood fiber provides an extremely soft and smooth surface detectable by human somatic sensibility.
REFERENCES:
patent: 4477313 (1984-10-01), Andersson
patent: 4488932 (1984-12-01), Eber et al.
patent: 5102501 (1992-04-01), Eber et al.
"Fiber Analysis of Paper and Paperboard", T 401 om-88, approved by the Physical Properties Committee of the Process and Product Quality Div., TAPPI.
"Enhancement Of Paper Properties and Fibre Economics Through Web Stratification" by Robert E. Page et al.
Chin Peter
James River Corporation of Virginia
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