Creping adhesives for through-dried tissue

Details Creping adhesives for through-dried tissue Creping adhesives for through-dried tissue

C - Chemistry, Metallurgy

09

D

92/10, 92/2

C09D 131/04 (2006.01) D21H 17/36 (2006.01) D21H 21/14 (2006.01) C08L 29/04 (2006.01)

Patent

CA 1131958

ABSTRACT OF THE DISCLOSURE In the commercial production of tissue paper and the like a web, formed from a slurry of water and fiber, is creped while essentially (98%) dry, from a rotating cylindrical dryer. Adhesives are frequently employed to hold the web to the dryer surface and acetate-ethylene copolymer emulsions serve this function. Such adhesives are relatively soft, tend to adhere to the fabrics which carry the paper web to the dryer surface and tend to make cleaning of the carrying fabric difficult. Additionally, these adhesives tend to cause blocking of the tissue paper when in roll form and adjacent plies of the paper tend to be torn upon separation. However, it has been found that by providing an adhesive creping composition to have between about 10% to 33% by weight of a water soluble polyvinyl alcohol, based on acetate-ethylene copolymer solids present in the composition, the cleanability of the carrying fabric is improved, roll blocking is minimized and the consistency of the adhesion of the drying web to the dryer is improved. Additionally, the tendency of the polyvinyl alcohol which itself has adhesive properties, to foul the dryer with a hard uneven film of alcohol is overcome.

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