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صفحه اصلی
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بیست و نهمین کنفرانس شیمی آلی ایران
Preparation of yankee drying release in an cheap Method for use in tissue making
نویسندگان :
Zahra Chenani ( دانشگاه کردستان )
کلید واژه ها :
release،sylinder،yankee،tissue making
چکیده مقاله :
Tissue products such as facial tissue and paper towels have been playing a crucial role in promoting hygiene and maintaining good health, since they are commonly available and widely used nowadays. The production of low-density tissue paper typically involves a key creping process that contains pressing and adhering the wet web onto a high-speed Yankee cylinder, followed by releasing the creped sheet with a stationary creping blade to form periodic micro-folds within the tissue structure. This paper discusses and reviews the mechanisms of tissue creping technology, as well as the factors that impact the creping process and tissue properties. These factors primarily include the dryness of the tissue web, creping rate, properties of the pulp raw material, Yankee coating, crepe doctor blade, and tissue drying machines. It is indicated that the creping process, as a multifaceted and integrated treatment for tissue production, can be significantly enhanced through the concerted efforts of the aforementioned factors to achieve greater creping efficiency.[1] At the interface between the Yankee dryer surface and the tissue web resides a thin film comprising an agglomeration of materials we call a Yankee coating. The Yankee coating is composed of chemical additives applied to facilitate development of specific film properties(e.g. adhesion and release) and “natural” components from the wet end, process water along with cellulosic material from the sheet. For a coating to provide “Best Practice” results it must be able to protect the Yankee surface and be optimized to deliver the proper level of uniform adhesion for commercial creping operations.[2]
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