High strength packing paper board by mixed fibre of bluish dogbane and sorghum stalks and preparation method thereof
A technology for sorghum straw and packaging cardboard, which is applied to non-woody plants/crop pulp, etc., can solve the problems of high cost and consumption of high-strength wood, and achieve the effects of low cost, improved strength, and beneficial to greening and environmental protection.
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[0011] The present invention is further described below with optimal embodiment: get 1 ton of whole stalk kenaf, 1 ton of sorghum stalks, cut into 20mm segments with a hay cutter, add ammonium sulfite 300~400kg, magnesium oxide 60Kg, liquid ratio 1: 2.5~3, the balance is water, put it into the steaming ball or evaporator twice, let out a small amount of gas to reach the maximum filling capacity, and put it into the air pressure of 0.4-0.5Mpa for normal production, the temperature is 160~170℃, Carry out steaming and heat preservation for 2-2.5 hours. The specific time can be determined according to the hardness of kenaf and sorghum straw. The time for small hardness is less, and the time for high hardness is longer. After cooking, decompress and deflate, and pour it under the ball In the pool, three-stage cycle washing, sieving and grinding, and papermaking are carried out.
[0012] The waste slag of the high-strength packaging cardboard produced by the invention can be used as...
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