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.

Inactive Publication Date: 2005-01-05
刘海博
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AI Technical Summary

Problems solved by technology

This kind of wrapping paper mainly has high cost and consumes a lot of high-strength wood.

Method used

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Embodiment Construction

[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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Abstract

The invention belongs to a packing paperboard, specially relating to a bluish dogbane- sorghum stalk mixed fiber high-strength packaging paperboard and its preparing method, adopting the following raw materials in weight share: full-stalk bluish dogbane 1 share, sorghum stalks 1 shares, ammonium sulfite 0.3-0.4 share, magnesium oxide 0.03 share, where the liquor ratio is 1 : 2.5-3, and the rest water, cutting the full-stalk bluish dogbane and sorghum stalks into 20 mm-long segments, adding in water for predipping, placing in an evaporating ball or device at twice, deflating to a small extent to achieve the maximum filling quantity, cooking at 0.4Mpa-0.5Mpa at temperature 160-170 deg.C, where the cooking and heat-preserving time is 2-2.5 hours, reducing pressure and deflating, pouring in a bottom tank, making three-stage circulating wash, screening and milling, making paper, and the paperboard strength is largely improved, it can save large amount of timber, and beneficial to greening and environmental protection.

Description

technical field [0001] The invention belongs to packaging cardboard, in particular to a high-strength packaging cardboard with kenaf and sorghum straw mixed fibers and a preparation method thereof. technical background [0002] At present, the packaging cardboard produced in my country uses high-strength wood as the main raw material, such as coniferous pine. This wrapping paper mainly has high cost and consumes a large amount of high-strength wood. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, and provide a low-cost, high-quality wood-saving, high-strength packaging cardboard with mixed fibers of kenaf and sorghum straw and a preparation method thereof. [0004] The technical solution adopted by the present invention to solve the technical problem is: the raw materials used in the high-strength packaging cardboard and their proportions (by weight): 1 part of whole stalk kenaf, 1 part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12
Inventor 刘宁王秋玲罗耀
Owner 刘海博
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