Elaborate brown paper and producing method thereof

A production method and technology of kraft paper, applied in the direction of vegetable parchment/imitation parchment, pulp bleaching, chemical/chemical mechanical pulp, etc., can solve the problems of environmental pollution, high production cost, single fiber raw material, etc., to reduce production cost, Improved appearance and high physical strength

Inactive Publication Date: 2008-01-09
YONGZHOU XIANGJIANG PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The scheme disclosed in Chinese Patent Application No. 93109932 uses larch as raw material, adopts hypochlorite bleaching, and has the disadvantage of producing organic chlorides that are not easy to biodegrade in the bleaching process and pollutes the environment; the scheme of Chinese Patent Application No. 98106862 uses 100 %Russian bleached softwood pulp is used as raw material, which has the disadvantages of high production cost and high dependence on foreign countries; Chinese patent application number 200610047147 proposes a method for producing refined kraft paper using American waste paper,
[0007] The refined kraft paper produced according to the above cannot meet the quality requirements of the Ministry of Health for food packaging base paper, and its use is restricted to a certain extent.
And the fiber raw materials used are relatively simple, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The production method of embodiment 1 is as follows:

[0012] Masson pine with an absolute dry mass ratio of 60%, 15% Chinese fir, and 25% various broad-leaved wood fiber raw materials are used to prepare raw materials, kraft cooking, washing and screening, and produce kraft natural color wood pulp. In the pulping process, it can Mixing or separate pulping; natural color wood pulp is mixed to produce micro-bleached wood pulp through oxygen delignification and hydrogen peroxide bleaching, oxygen delignification pulp concentration is 7%, temperature is 70°C, oxygen pressure is 310Kpa, time is 40 minutes, bleaching The pulp concentration is 10%, the amount of hydrogen peroxide is 1% (to the absolute dry pulp weight ratio), the pH value of bleaching is 10.5; the whiteness of micro-bleached wood pulp is 24%, the pulp is beaten at a beating concentration of 3.5%, and the beating degree is 28°SR , Wet weight: 12.5g. After beating, the slurry is desanded, seasoned, pressure sie...

Embodiment 2

[0014] The production method of embodiment 2 is as follows:

[0015] Masson pine with an absolute dry mass ratio of 80%, 5% Chinese fir, and 15% various broad-leaved wood fiber raw materials are used to prepare raw materials, kraft cooking, washing and screening, and produce kraft natural color wood pulp. In the pulping process, it can be Mixing or separate pulping; natural wood pulp is mixed to produce micro-bleached wood pulp through oxygen delignification and hydrogen peroxide bleaching, oxygen delignification pulp concentration 12%, temperature 90 ° C, oxygen pressure 500Kpa, time 60 minutes, bleaching The pulp concentration is 12%, the amount of hydrogen peroxide is 12% (to the absolute dry pulp weight ratio), the pH value of bleaching is 11; the whiteness of micro-bleached wood pulp is 34%, the pulp is beaten at a beating concentration of 4%, and the beating degree is 32°SR , Wet weight: 15g. After beating, the slurry is desanded, seasoned, pressure sieved and finely scr...

Embodiment 3

[0017] The production method of embodiment 3 is as follows:

[0018] Masson pine with a dry weight ratio of 60% and various broad-leaved wood fiber raw materials with a dry mass ratio of 60% and 40% are prepared, kraft cooked, washed and screened to produce kraft natural color wood pulp, which can be mixed or individually pulped during the pulping process ;Oxygen delignification and hydrogen peroxide bleaching are used to produce micro-bleached wood pulp after natural color wood pulp is mixed. The oxygen delignification pulp concentration is 10%, the temperature is 80°C, the oxygen pressure is 400Kpa, the time is 55 minutes, and the bleaching pulp concentration is 11%. , Hydrogen peroxide consumption 11% (to absolute dry pulp weight ratio), bleaching PH value 10.8; Slightly bleached wood pulp brightness 30%, pulp beating under beating concentration 3.8%, beating degree 30 ° SR, wet weight: 12g , The pulp after beating is desanded, seasoned, pressure sieved and finely screened,...

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Abstract

The invention relates to elaborate works brown paper and its manufacturing method. It includes the following steps: using more than 60% masson pine, less than 15% cedar, less than 40% various broadleaf wood as material; steam boiling; washing screening; oxidizing delignify; bleaching to form sulfate micro drift wood pulp of which slurry brightness is 24-34%; pulping concentration is 3.5-4.0%; pumping degree is 26-34 degree SR; green weight is 10-15g; de-sanding; fixing; fine screening; forming; pressing; drying; coiling; recoiling; packing. The invention has the advantages of wide material source, low cost, satisfying the demands for cleaning production and food base paper quality.

Description

Technical field: [0001] The present invention relates to a kind of paper and its production method, especially relates to a kind of high-quality kraft paper and its production method. Background technique: [0002] Fine kraft paper is an updated product of ordinary kraft paper. In addition to the high strength of ordinary kraft paper, it also needs to have better appearance quality and certain printing performance to meet the needs of the growing paper packaging industry. In recent years, related research has emerged literature: [0003] Chinese Patent Application No. 93109932 discloses a refined kraft paper manufacturing process, which includes a pre-order process consisting of peeling, flaking, cooking, washing and slag removal, followed by beating, netting, pressing, light pressing, drying, calendering, The subsequent process of crimping and rewinding is characterized in that the moisture content is less than 35%, the cold water extract is less than 2.21%, the hot water ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/06D21H11/04D21H11/06D21C9/16
Inventor 王福纪朱杰苏德良桂来争刘便初赵桂林杨爱平刘玉石杨蓉
Owner YONGZHOU XIANGJIANG PAPER CO LTD
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