D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/28 (2006.01) C08B 30/12 (2006.01) C09J 103/02 (2006.01) D21H 21/16 (2006.01) D21H 23/18 (2006.01)
Patent
CA 2225447
A wet end additive composition which is used as a sizing agent in a papemtaking process, the composition comprising a two phase suspension of swollen starch having a dry substance from about 0.5 to about 30% by weight, a cooked swollen volume from about 1.6 ml./gram to about 100 ml./gram and cooked solubles from about 0.5 R6 to about 50% by weight. The composition is preparated starching with a starch slurry having a relatively low concentration (dry substance) of starch. The slurry is subjected to carefully controlled swelling conditions (temperature and pH) which can vary depending upon the type of starch employed. The dry substance of the slurry also may vary depending upon whether a continuous or batch process is employed. The composition is used in a papermaking process by adding it to the furnish after the refining stage.
Composition additive finale humide utilisée comme agent d'encollage dans un processus de fabrication du papier et comprenant une suspension biphasique d'amidon gonflé contenant une substance sèche en une quantité comprise entre environ 0,5 et environ 30 % en poids, un volume gonflé cuit compris entre environ 1,6 ml/g et environ 100 ml/g et des solubles cuits en une quantité comprise entre 0,5 % et 50 % en poids. Cette composition est préparée à partir d'une boue d'amidon à concentration relativement faible (substance sèche) d'amidon. La boue est soumise à des conditions de gonflement soigneusement contrôlées (température et pH) qui peuvent varier en fonction du type d'amidon utilisé. La substance sèche de la boue peut également varier selon le mode de traitement utilisé, soit continu, soit par lot. La composition est utilisé dans un procédé de fabrication du papier et est ajoutée à la composition de fabrication après l'étape de raffinage.
Mentzer Merle J.
Piazza Eduardo A.
Corn Products International Inc.
Cpc International Inc.
Ridout & Maybee Llp
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