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A non-wood and pulp technology, applied in non-woody plant/crop pulp, raw material separation, raw material pretreatment, etc., can solve the problems of stains, dust falling off, excessively white color, etc., to reduce temperature and steam pressure, improve Cellulose content, the effect of improving appearance characteristics
Active Publication Date: 2016-07-20
ANHUI GEYI CYCLIC ECONOMY IND PARK
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In addition, in order to improve the hand feeling, various papermaking additives are added, such as talcum powder, which makes it too slippery or dust often falls off during use.
In addition, over-bleaching is performed to increase whiteness, making the color excessively white or stained
However, these methods cannot fundamentally solve the problems especially caused by herbal raw materials
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[0054] Preparation of non-wood pulp 1:
[0055] 50 tons of wheat straw is used as raw material, and the raw material is pretreated by dust removal, cutting and crushing, and then sent to the cooking tank through the conveying equipment, and steamed with about 2.0MPa steam for about 5 minutes, after cooking, multi-stage cleaning with water is carried out, and passed Precipitation is used for solid-liquid separation, the upper liquid containing hemicellulose is separated, and the solid content of the lower layer after cooking is recovered.
[0056] Next, add 4.5% aqueous sodium hydroxide solution to the obtained cooked solids, cook at about 100°C for about 1 hour, precipitate after cooking, and recover the lower layer of solids, which is the cellulose product (this Invented non-wood pulp 1).
[0057] After analysis, the obtained cellulose product is about 13 tons, and its various indicators are: concentration 28.63%, K value 5.32, percussion degree SR 26.5°, wet weight 2.93g, w...
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Abstract
The invention provides non-wood type paper pulp, which is a cellulose product prepared through three-element separation of a herbaceous plant material. The cellulose product has the properties that the concentration of total weight cellulose based on the cellulose product is 25-30 percent; a K value is below 5.5; a beating degree is 20-30 degrees SR; the wet weight is 2-3.5g; the whiteness is below 44.5 degrees; the pH value is 7-9; the cellulose content based on total solid weight is 90-97 percent. Compared with products of the same kind, the non-wood type paper pulp has higher cellulose content; prepared paper has more superior appearance features. Moreover, no chemical agent is added and bleaching treatment can be omitted when the non-wood type paper pulp is used for making paper, so that residues are avoided, and the non-wood type paper pulp is harmless to human body during use.
Description
technical field [0001] The invention relates to the field of high-efficiency and comprehensive utilization of biomass resources, in particular to non-wood pulp which is mainly a cellulose product obtained by separating three elements. Background technique [0002] The raw material for papermaking is mainly plant fibers. Coniferous or broad-leaved wood is mainly used in economically developed countries, which account for more than 95% of the total consumption. There are relatively many types of plant fiber raw materials used in China, including (1) coniferous wood, such as larch, red pine, masson pine, Yunnan pine, sylvestris pine, etc.; (2) broad-leaved tree wood, such as poplar and birch (3) Herbaceous plants, such as reed, bamboo, miscanthus, wheat straw, straw, asparagus, sorghum stalk, bagasse, etc.; (4) Bast fibers, such as flax, jute, kenaf, sandalwood Bark, mulberry bark, cotton stalk bark, etc.; (5) Wool fibers, such as cotton, cotton linters, and cotton rags. Fro...
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