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US 4,166,001 AGranted
Multiple layer formation process for creped tissue
AssigneeKimberly-Clark Corporation
InventorsCharles E. Dunning, William D. Lloyd, Joseph G. Bicho
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AssigneeKimberly-Clark Corporation
InventorsCharles E. Dunning, William D. Lloyd, Joseph G. Bicho
Estimating the term…
A process for directly forming multiple layer web, and creping such webs to provide absorbent, soft and bulky, creped tissue. The process produces a laminar fibrous formation with outer layers of strongly bonded fibers separated by an intermediate central section of weakly bonded fibers, which outer layers are creped such that the crepe in one outer layer is independent of the crepe in the other outer layer. The process utilizes a multiple slice inlet with different fiber stock supplied via the inlet to form the weakly bonded central layer of the fibrous formation; the base formation is subjected to two creping operations: one side of the fibrous formation is adhered to the surface of a dryer and creped therefrom, the once-creped web is inverted, and the other side adhered to the surface of a dryer and again creped therefrom, producing finely creped, soft and bulky outer surface layers of strongly bonded fibers which are capable of delamination, each layer shearing away from the other during the creping operations because of the weakly bonded intermediate fibrous section and the final product simulating a two ply tissue in bulk and softness while having been formed as a single ply.
A process for the manufacture of creped tissue suitable for sanitary products such as facial and bathroom tissue, from papermaking fibers suspended in aqueous stock, said process comprising:
A process for the manufacture of creped tissue from aqueous stock of papermaking fibers, said creped tissue being suitable for sanitary products such as facial and bathroom tissue, comprising:
A process for the manufacture of creped tissue suitable for sanitary products such as facial and bathroom tissue, comprising:
A three layer tissue of papermaking fibers made by simultaneous formation from 3 layers of fiber stock creped on both surfaces having a dryer basis weight of between about ten and about forty lbs./2880 sq. ft. and suitable for sanitary tissue products, said tissue having a laminar construction of discrete finely creped outer surface layers of fibers partially sheared away from each other along a plane through the central section layer of fibers intermediate said outer surface layers, the fibers of said outer surface layers being bonded uniformly to each other overall with stronger interfiber bonds than between the fibers in said central section of said tissue, said stronger interfiber bonds in said outer surface layers being distributed substantially equally in every unit area thereof, the crepe in each outer layer being a fine, irregular crepe and the interfiber bonds between the fibers in said outer surface layers and in said central layer of said tissue including said shear plane consisting essentially of natural interfiber bonds with the interfiber bonds in said central layer being weaker than said stronger interfiber bonds in said outer surface layers.
Dependencies are inferred from the claim text.