Food packaging paper and cultural paper method

Food packaging paper and cultural paper method

Application number: CN200410050681.9 Publication number: CN1600989

Application Date: 2004.10.26 Public Day: 2005.03.30

Applicant: Tian Xin, Luo Shaochu

The invention belongs to the papermaking technology, and in particular relates to a method for producing food packaging paper and culture paper by using a corn stalk to produce completely chlorine-free bleached pulp. Corn stalks or dehulled corn stalks are used as raw materials and are cut, dusted, pre-soaked, steamed, and bleached. The cooking agent is mainly ammonium sulfite, potassium sulfite or sodium sulfite, sulfur or sulfur urine as auxiliary, urea and sodium hydroxide as buffers. The bleaching process utilizes oxygen and alkali-enhanced two-stage or multi-stage bleaching to protect the fibers with urea or thiourea and activate hydrogen peroxide. The whole chlorine-free process produces corn stalks or de-puddered corn stalk pulp, and produces chlorine-free bleached food packaging paper and board, cultural paper and paperboard that are in direct or indirect contact with foods and humans. The product does not contain organic chlorides, such as highly toxic dioxin-like carcinogens. Bleached waste liquids do not contain chloride ions and can enter alkali recovery. Waste water can be recycled, energy-saving and water-saving. The environmental protection benefits are outstanding.


Source: Southwest Paper

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