METHOD FOR MANUFACTURING DEGRADABLE PAPER MULCHES USING COTTON LINTERS

摘要

A method for manufacturing degradable paper mulches using cotton linters, comprising the following steps: (1) feeding cotton linters and additives to a twin-screw pulping machine for kneading and fiber separation, the additives being KOH and sodium tripolyphosphate; (2) conveying the pulp obtained by means of kneading and fiber separation to a holdup tank, standing for a reaction of 65-70 min, and then performing digestion, washing, residue removal, and beating; and (3) conveying the pulp treated in step (2) to a papermaking machine, so as to make paper mulches, 120-130 kg of cornstarch, 15-20 kg of a paper wet-strength agent, and 10-12 kg of a paper water-proofing and damp-proofing agent being added to pulp during papermaking per ton. High papermaking efficiency of 90-95% can be achieved; wastewater produced in the system has a high b/c ratio and is easy to biodegrade; the manufactured paper mulches contain a large amount of phosphorus and potassium, and therefore can provide nutrients for the growth of cotton after being degraded; as compared with conventional plastic mulches, 1/3 of the costs can be saved.