A kind of uncolored poplar wood pulp and its production process

A natural and wood pulp technology, applied in post-treatment modification of cellulose pulp, washing/replacing pulp treatment liquid, papermaking, etc., can solve the problem of not having a natural and retro style, non-recyclable black liquor, and difficult to obtain bulk. Improve and other problems to achieve the effect of inhibiting peeling reaction, protecting fibers, and feeling soft

Active Publication Date: 2020-11-17
山东光华纸业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The process is complex and the production cost is high;
[0008] 2. The wood pulp prepared by the prior art generally has high whiteness and large fluctuations up and down, the upper and lower limits of whiteness are unstable, and it does not have a natural and retro style;
[0009] 3. In the prior art pulping process, the black liquor produced cannot be recycled, causing waste and environmental pollution;
[0010] 4. In the prior art, it has not been found that poplar is used as a raw material to prepare natural wood pulp with high bulk. The main reason is that the natural color pulp in the prior art has not been processed, and the bulk is difficult to improve

Method used

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  • A kind of uncolored poplar wood pulp and its production process
  • A kind of uncolored poplar wood pulp and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 A kind of production technology of uncolored poplar wood pulp

[0054] Include the following steps:

[0055] The second invention purpose of the present invention is to provide a kind of production technology of uncolored poplar wood pulp, specifically comprises the following steps:

[0056] (1) Cooking: Transport the poplar slices to the screw conveyor by dragging, and add the prepared lye and cooking aids in the middle of the screw conveyor; the poplar slices are mixed with lye and cooking aids in the screw conveyor After mixing evenly, put the mixed poplar slices into steaming balls through a baller for steaming;

[0057] The poplar wood slices meet the following criteria: moisture content 22%, thickness between 0.8 mm, no impurities and bark, no black rot.

[0058] The temperature of the lye added to the screw conveyor is 80°C;

[0059] Wherein, the throwing amount (air-dried) of poplar slices in the steamed ball is 8.5t / ball;

[0060] The amount of...

Embodiment 2

[0081] Embodiment 2 A kind of production technology of uncolored poplar wood pulp

[0082] Include the following steps:

[0083] (1) Cooking: Transport the poplar slices to the screw conveyor by dragging, and add the prepared lye and cooking aids in the middle of the screw conveyor; the poplar slices are mixed with the lye and cooking aids in the screw conveyor After mixing evenly, put the mixed poplar slices into steaming balls through a ball loader, and cook; the poplar slices meet the indicators: moisture 18%, thickness 1.2-1.5mm, no impurities and bark, no black rot; The temperature of the lye added to the screw conveyor is 100°C; the amount of poplar slices in the steamed ball (air-dried) is 9.0t / ball; the amount of alkali used for cooking is 22%; the ratio of cooking liquid is 1:3;

[0084] The consumption of the cooking aid is 7.5kg / ball; the cooking agent is a new type of anthraquinone, preferably produced by Henan Hongruide New Material Technology Co., Ltd; %, effec...

Embodiment 3

[0091] Embodiment 3 A kind of production technology of uncolored poplar wood pulp

[0092] Include the following steps:

[0093] (1) Cooking: Transport the poplar slices to the screw conveyor by dragging, and add the prepared lye and cooking aids in the middle of the screw conveyor; the poplar slices are mixed with the lye and cooking aids in the screw conveyor After mixing evenly, put the mixed poplar slices into steaming balls through a baller for steaming;

[0094] The indicators that the poplar slices meet: moisture 23%, thickness between 1.0-1.4mm, no impurities and bark, no black rot; the temperature of the lye added to the screw conveyor is 100°C; the poplar slices in the steaming ball The amount of balls thrown (air-dried) is 8.5t / ball; the amount of alkali used for cooking is 20%; the ratio of cooking liquid is 1:2;

[0095] The consumption of the cooking aid is 8.0kg / ball; the new type of anthraquinone as the cooking agent is preferably produced by Henan Hongruide ...

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Abstract

The invention provides natural color poplar pulp. The poplar pulp whiteness is 28-30%, the poplar thickness is 1.60-1.95cm<3> / g and the hardness is 15-25K. The invention also provides a preparation technology for the natural color poplar pulp. The preparation technology comprises a heat preservation step which includes the steps of deflating; and injecting black liquor into a spherical boiler whenthe spherical boiler is deflated till the pressure is 0 in the step of deflating, wherein the volume of the black liquor injected into the spherical boiler is 3-8 square / boiler. According to the invention, the characteristic of low whiteness of the natural color poplar pulp is utilized, the steamed black liquor is reusable, the whole-process zero emission of the black liquor is realized, the uniformity of the prepared different batches of poplar pulps and the quality of the end product are further improved. The natural color poplar pulp prepared by the invention has the advantages of high tensile index, low tearing index, suitability for production and manufacturing of paper for daily use, natural color and style of the wood, soft hand feel and natural texture.

Description

technical field [0001] The invention relates to a wood pulp and its production process, in particular to a natural color poplar wood pulp and its production process. Background technique [0002] At present, wood pulp paper is generally seen in the market for household paper. Wood pulp paper generally refers to paper made of wood as raw material through beating, cooking, bleaching and other processes. The paper is fine, soft, smooth and white. However, because the waste water produced in the production process is very serious to the environment, the organic chloride in the waste water is the most toxic substance among the known organic compounds, which will cause three effects on all organisms, namely carcinogenic and mutagenic , Teratogenicity. [0003] Unbleached poplar pulp is a kind of unbleached chemical poplar pulp only through cooking, without adding any chemical bleaching agent, so it is an environmentally friendly and hygienic original ecological unbleached pulp. U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21H11/20D21C9/02D21F9/00D21D5/02
CPCD21C5/00D21C9/02D21D5/02D21F9/00D21H11/20
Inventor 臧雷郑万伦张安军吕兴巧赵文超
Owner 山东光华纸业集团有限公司
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