CN105568736B - The production technology of brown paper - Google Patents
The production technology of brown paper Download PDFInfo
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- CN105568736B CN105568736B CN201510952750.3A CN201510952750A CN105568736B CN 105568736 B CN105568736 B CN 105568736B CN 201510952750 A CN201510952750 A CN 201510952750A CN 105568736 B CN105568736 B CN 105568736B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
Abstract
The invention discloses a kind of production technology of brown paper, log is used for raw material, through boiling, bleaching, screening, mashing, applying glue, slagging-off, upper net forming, squeezing, drying, batch and produce body paper with press polish, it by absolute dry mass ratio is 20~40 that the mashing of the log, which is,:10~20:20~40:10~20:40~60:10~20:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is mixed after being handled respectively through mashing, obtained mixing slurry.The present invention can adjust the species, ratio and beating degree of raw paper pulp fiber, in body paper surface coating, and by changing the technological parameter of each step, to improve fibre strength, obtain more preferable pop strength, water resistance, printing performance.
Description
Technical field
The present invention relates to pulping and paper-making field.It is more particularly related to a kind of production technology of brown paper.
Background technology
Exquisite kraft paper is the renewal product of conventional kraft paper, is widely used in film packaging, medical package, archives
The fields such as bag, envelope, melon seed bag, hand carrying bag.Using micro- Exquisite kraft paper for being produced as raw material of drift sulfate wood pulp, due to color and luster compared with
Shallow, smoothness and intensity preferably, adapt to the packaging and print request of packing material, are a kind of packaging industry former materials being popular
Material, instead of common NK natural kraft in very large range, and the market demand is in the gesture of rapid growth.Therefore, in recent years we into
Work(develops this product, and product quality has reached domestically leading level, meets the demand in market.However, current brown paper
Fibrous raw material that production technology is used is relatively simple, burst index, tear index are relatively low, is also easy to produce tear phenomenon.In addition, without
The brown paper of coating, rough surface, quality are loose, smalls strong, easily immersion.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of production technology of brown paper, it can adjust raw paper pulp fiber
Species, ratio and beating degree, in body paper surface coating, and by changing the technological parameter of each step, to improve fibre strength,
Obtain more preferable pop strength, water resistance, printing performance.
In order to realize that there is provided a kind of production technology of brown paper, bag according to object of the present invention and further advantage
Include：Log is used for raw material, through boiling, bleaching, screening, mashing, applying glue, slagging-off, upper net forming, squeezing, drying, batches and presses
Light produces body paper, and it by absolute dry mass ratio is 20~40 that the mashing of the log, which is,:10~20:20~40:10~20:40~60:
10~20:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is mixed after being handled respectively through mashing, is obtained
The mixing slurry arrived, the beating consistency of Oak Tree is that 3%, beating degree is that 28 ° of SR, weight in wet base are 12g, the beating consistency 3% of birch, mashing
Degree is that 30 ° of SR, weight in wet base are 14g, and the beating consistency of Chinese fir is that 3%, beating degree is that 29 ° of SR, weight in wet base are 12g, the mashing of cinnamomum camphora tree
Concentration is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g, and the beating consistency of masson pine is that 3%, beating degree is that 29 ° of SR, weight in wet bases are
13g, the beating consistency of sago cycas is that 3%, beating degree is that 28 ° of SR, weight in wet base are 14g, and the beating consistency of bagasse is 3%, mashing
Degree is that 32 ° of SR, weight in wet base are 15g.
Preferably, the production technology of described brown paper, also includes：In the body paper surface coatings, the painting
Layer is that mass ratio is 4~6:2~3:1~1.5:0.2 methyl silicate, trim,ethylchlorosilane, the compound of methanol and agar,
Wherein, the absolute dry mass ratio of body paper and coating is 75~80:20.
Preferably, the production technology of described brown paper, the brown paper impregnates heat before applying coating by resin
Pressure processing.
Preferably, the production technology of described brown paper, the resin is cyanurotriamide modified diallyl phthalate
Propyl ester, azodiisobutyronitrile are that initiator, ethanol are solvent, and dipping heat pressing process is：120 DEG C of hot pressing temperature, pressure 0.2MPa,
Time 25min.
Preferably, the production technology of described brown paper, the temperature of boiling step is 135 DEG C.
Preferably, the production technology of described brown paper, blanching step includes passing sequentially through dense oxonium base delignification, mistake
Three bleaching processes of hydrogen oxide, hydroquinones, the slurry concentration of dense oxonium base delignification process is that 6%, temperature is 65 DEG C, oxygen
Press as 250kPa, the slurry concentration of Alkali Hydrogen Peroxide System is that 6%, bleaching pH value is 10, the slurry of hydroquinones bleaching process
It is 3% to expect concentration, and wherein solvent is the magnetized water that 3h was soaked through cocoanut shell.
Preferably, to be also by mass fraction at 40 DEG C after the production technology of described brown paper, blanching step
10% dilute hydrochloric acid solution rinsing.
Preferably, the production technology of described brown paper, squeezing step is using answering that the nip of four-roller three and malleation are squeezed
Combined pressure is squeezed, and the line pressure in each area is：One nip 5.5MPa, two nip 6.5MPa, three nip 5MPa, four nip 6MPa.
Preferably, the production technology of described brown paper, calendaring step uses soft calender.
The present invention at least includes following beneficial effect：
Firstth, the present invention preferably Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is used as pulp fiber
Source, improves the relatively simple softwood pulp production problem caused of raw material, effectively using processing remaining sides plate, saved into
This, control beating consistency, beating degree and weight in wet base technological parameter keep fibre length, balance high-air-permeability, low tightness with it is smooth
Degree, strengthens the combination between pulp fiber, improves physical strength and formation of sheet, significantly improve outward appearance；
Secondth, in body paper surface coatings, to increase water resistance and printing performance, coating selection methyl silicate,
Trim,ethylchlorosilane, methanol, the compound of agar, agar cause surface construction special construction so that the static state of coating and water
Contact angle reaches 110 °, and easy gel, hydrophobic effect is best；Using cyanurotriamide modified diallyl phthalate resin table
Face impregnates, and water-resistance and grease resistance significantly improve under the hot pressing temperature, pressure, time, is that applying coating is improved well
Basis；
3rd, reduction boiling temperature is to 135 DEG C so that different fibrous raw materials are steaming mixed uniform, Kappa number amplitude of variation
It is small, basis is provided using the yellow value of hydrogen peroxide bleaching raising slurry for after, the impurity such as bark, crude fibre is reduced, reduces paper
Dust material and coarse fiber bundle in；Blanching step uses dense oxonium base delignification, hydrogen peroxide, hydroquinones successively,
Hydroquinones bleaching is controlled according to the Kappa number of slurry now, makes slurry form and aspect stabilization, reach quality requirement, cocoanut shell immersion
The magnetized water crossed, it is to avoid slurry form and aspect fluctuation, improves into paper form and aspect stability；The calcium salt base of watery hydrochloric acid rinsing dissolving remaining, keeps away
Exempt from during visual angle with free rosin acid anion formation rosin acid calcium Chen Ding, it is to avoid the scale deposition in equipment；Four-roller
Three nips and the unipress of malleation squeezing so that the gas permeability and tightness of paper increase the same of rapid growth with squeeze pressure
When, balance the physical strength of paper；Soft calender improves the smoothness of paper, is easy to applying coating.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Embodiment
With reference to embodiment, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or many
The presence or addition of individual other elements or its combination.
It should be noted that experimental method described in following embodiments, unless otherwise specified, is conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained.
<Embodiment 1>
A kind of production technology of brown paper, including：Log is used for raw material, through boiling, bleaching, screening, mashing, applying glue,
Slagging-off, upper net forming, squeezing, drying, batch and produce body paper with press polish, it by absolute dry mass ratio is 20 that the mashing of the log, which is,:
10:20:10:40:10:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is handled respectively through mashing
After mix, obtained mixing slurry, the beating consistency of Oak Tree is that 3%, beating degree is that 28 ° of SR, weight in wet base are 12g, and the mashing of birch is dense
Degree 3%, beating degree are that 30 ° of SR, weight in wet base are 14g, and the beating consistency of Chinese fir is that 3%, beating degree is that 29 ° of SR, weight in wet base are 12g, fragrant
The beating consistency of camphor tree is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g, and the beating consistency of masson pine is that 3%, beating degree is 29 °
SR, weight in wet base are 13g, and the beating consistency of sago cycas is that 3%, beating degree is that 28 ° of SR, weight in wet base are 14g, and the beating consistency of bagasse is
3%th, beating degree is that 32 ° of SR, weight in wet base are 15g.
Wherein, the production technology of described brown paper, also includes：In the body paper surface coatings, the coating is
Mass ratio is 4:2:1:0.2 methyl silicate, trim,ethylchlorosilane, the compound of methanol and agar, wherein, body paper and coating
Absolute dry mass ratio be 75:20.
Wherein, the production technology of described brown paper, the brown paper is impregnated at hot pressing before applying coating by resin
Reason.
Wherein, the production technology of described brown paper, the resin be cyanurotriamide modified diallyl phthalate,
Azodiisobutyronitrile is that initiator, ethanol are solvent, and dipping heat pressing process is：120 DEG C of hot pressing temperature, pressure 0.2MPa, time
25min。
Wherein, the production technology of described brown paper, the temperature of boiling step is 135 DEG C.
Wherein, the production technology of described brown paper, blanching step includes passing sequentially through dense oxonium base delignification, peroxidating
Three bleaching processes of hydrogen, hydroquinones, the slurry concentration of dense oxonium base delignification process be 6%, temperature be 65 DEG C, oxygen pressure be
250kPa, the slurry concentration of Alkali Hydrogen Peroxide System is that 6%, bleaching pH value is 10, and the slurry of hydroquinones bleaching process is dense
Spend for 3%, wherein solvent is the magnetized water that 3h was soaked through cocoanut shell.
Wherein, by mass fraction to be also 10% at 40 DEG C after the production technology of described brown paper, blanching step
Dilute hydrochloric acid solution is rinsed.
Wherein, the production technology of described brown paper, the compound pressure that squeezing step is squeezed using the nip of four-roller three and malleation
Squeeze, the line pressure in each area is：One nip 5.5MPa, two nip 6.5MPa, three nip 5MPa, four nip 6MPa.
Wherein, the production technology of described brown paper, calendaring step uses soft calender.
After testing, the brown paper print gloss that embodiment 1 is produced is high, lead content (in terms of Pb) 0.33mg/kg, arsenic content
(in terms of As) ＜ 0.2mg/kg, fluorescent substance 254nm and 365nm and Decolorant Test (water, n-hexane) are feminine gender, per 100g
Large intestine bacterium colony ＜ 30, pathogenic bacteria are not detected.
<Embodiment 2>
A kind of production technology of brown paper, including：Log is used for raw material, through boiling, bleaching, screening, mashing, applying glue,
Slagging-off, upper net forming, squeezing, drying, batch and produce body paper with press polish, it by absolute dry mass ratio is 40 that the mashing of the log, which is,:
20:40:20:60:20:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is handled respectively through mashing
After mix, obtained mixing slurry, the beating consistency of Oak Tree is that 3%, beating degree is that 28 ° of SR, weight in wet base are 12g, and the mashing of birch is dense
Degree 3%, beating degree are that 30 ° of SR, weight in wet base are 14g, and the beating consistency of Chinese fir is that 3%, beating degree is that 29 ° of SR, weight in wet base are 12g, fragrant
The beating consistency of camphor tree is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g, and the beating consistency of masson pine is that 3%, beating degree is 29 °
SR, weight in wet base are 13g, and the beating consistency of sago cycas is that 3%, beating degree is that 28 ° of SR, weight in wet base are 14g, and the beating consistency of bagasse is
3%th, beating degree is that 32 ° of SR, weight in wet base are 15g.
Wherein, the production technology of described brown paper, also includes：In the body paper surface coatings, the coating is
Mass ratio is 6:3:1.5:0.2 methyl silicate, trim,ethylchlorosilane, the compound of methanol and agar, wherein, body paper and painting
The absolute dry mass ratio of layer is 80:20.
Wherein, the production technology of described brown paper, the brown paper is impregnated at hot pressing before applying coating by resin
Reason.
Wherein, the production technology of described brown paper, the resin be cyanurotriamide modified diallyl phthalate,
Azodiisobutyronitrile is that initiator, ethanol are solvent, and dipping heat pressing process is：120 DEG C of hot pressing temperature, pressure 0.2MPa, time
25min。
Wherein, the production technology of described brown paper, the temperature of boiling step is 135 DEG C.
Wherein, the production technology of described brown paper, blanching step includes passing sequentially through dense oxonium base delignification, peroxidating
Three bleaching processes of hydrogen, hydroquinones, the slurry concentration of dense oxonium base delignification process be 6%, temperature be 65 DEG C, oxygen pressure be
250kPa, the slurry concentration of Alkali Hydrogen Peroxide System is that 6%, bleaching pH value is 10, and the slurry of hydroquinones bleaching process is dense
Spend for 3%, wherein solvent is the magnetized water that 3h was soaked through cocoanut shell.
Wherein, by mass fraction to be also 10% at 40 DEG C after the production technology of described brown paper, blanching step
Dilute hydrochloric acid solution is rinsed.
Wherein, the production technology of described brown paper, the compound pressure that squeezing step is squeezed using the nip of four-roller three and malleation
Squeeze, the line pressure in each area is：One nip 5.5MPa, two nip 6.5MPa, three nip 5MPa, four nip 6MPa.
Wherein, the production technology of described brown paper, calendaring step uses soft calender.
After testing, the brown paper print gloss that embodiment 2 is produced is high, lead content (in terms of Pb) 0.31mg/kg, arsenic content
(in terms of As) ＜ 0.2mg/kg, fluorescent substance 254nm and 365nm and Decolorant Test (water, n-hexane) are feminine gender, per 100g
Large intestine bacterium colony ＜ 30, pathogenic bacteria are not detected.
<Embodiment 3>
A kind of production technology of brown paper, including：Log is used for raw material, through boiling, bleaching, screening, mashing, applying glue,
Slagging-off, upper net forming, squeezing, drying, batch and produce body paper with press polish, it by absolute dry mass ratio is 30 that the mashing of the log, which is,:
15:30:15:50:15:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, masson pine, sago cycas and bagasse is handled respectively through mashing
After mix, obtained mixing slurry, the beating consistency of Oak Tree is that 3%, beating degree is that 28 ° of SR, weight in wet base are 12g, and the mashing of birch is dense
Degree 3%, beating degree are that 30 ° of SR, weight in wet base are 14g, and the beating consistency of Chinese fir is that 3%, beating degree is that 29 ° of SR, weight in wet base are 12g, fragrant
The beating consistency of camphor tree is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g, and the beating consistency of masson pine is that 3%, beating degree is 29 °
SR, weight in wet base are 13g, and the beating consistency of sago cycas is that 3%, beating degree is that 28 ° of SR, weight in wet base are 14g, and the beating consistency of bagasse is
3%th, beating degree is that 32 ° of SR, weight in wet base are 15g.
Wherein, the production technology of described brown paper, also includes：In the body paper surface coatings, the coating is
Mass ratio is 5:2.5:1:0.2 methyl silicate, trim,ethylchlorosilane, the compound of methanol and agar, wherein, body paper and painting
The absolute dry mass ratio of layer is 78:20.
Wherein, the production technology of described brown paper, the brown paper is impregnated at hot pressing before applying coating by resin
Reason.
Wherein, the production technology of described brown paper, the resin be cyanurotriamide modified diallyl phthalate,
Azodiisobutyronitrile is that initiator, ethanol are solvent, and dipping heat pressing process is：120 DEG C of hot pressing temperature, pressure 0.2MPa, time
25min。
Wherein, the production technology of described brown paper, the temperature of boiling step is 135 DEG C.
Wherein, the production technology of described brown paper, blanching step includes passing sequentially through dense oxonium base delignification, peroxidating
Three bleaching processes of hydrogen, hydroquinones, the slurry concentration of dense oxonium base delignification process be 6%, temperature be 65 DEG C, oxygen pressure be
250kPa, the slurry concentration of Alkali Hydrogen Peroxide System is that 6%, bleaching pH value is 10, and the slurry of hydroquinones bleaching process is dense
Spend for 3%, wherein solvent is the magnetized water that 3h was soaked through cocoanut shell.
Wherein, by mass fraction to be also 10% at 40 DEG C after the production technology of described brown paper, blanching step
Dilute hydrochloric acid solution is rinsed.
Wherein, the production technology of described brown paper, the compound pressure that squeezing step is squeezed using the nip of four-roller three and malleation
Squeeze, the line pressure in each area is：One nip 5.5MPa, two nip 6.5MPa, three nip 5MPa, four nip 6MPa.
Wherein, the production technology of described brown paper, calendaring step uses soft calender.
After testing, the brown paper print gloss that embodiment 3 is produced is high, lead content (in terms of Pb) 0.3mg/kg, arsenic content (with
As is counted) ＜ 0.2mg/kg, fluorescent substance 254nm and 365nm and Decolorant Test (water, n-hexane) are feminine gender, big per 100g
Intestines bacterium colony ＜ 30, pathogenic bacteria are not detected.
Indices detection is carried out to the brown paper that embodiment 1~3 is produced, testing result is as shown in table 1.
Table 1
| Index name and unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Quality index |
| Quantitative/(gm-2) | 80 | 80 | 80 | (40-120) ± 5% |
| Burst index/(kPam-2·g-1) | 3.45 | 3.66 | 3.75 | ≥3 |
| Tear index (longitudinal direction)/(mNm-2·g-1) | 9.2 | 9.4 | 10.4 | ≥8.5 |
| Whiteness/% | 23 | 24 | 24 | 22~26 |
| Smoothness (front)/% | 17.5 | 16.7 | 18.5 | ≥8 |
| Deliver goods moisture/% | 8.4 | 7.9 | 8.9 | 9±2 |
| Water absorbent surface/(gm-2) | 22 | 24 | 20 | ≤40 |
Number of devices and treatment scale described herein are the explanations for simplifying the present invention.To brown paper of the present invention
The application of production technology, modifications and variations will be readily apparent to persons skilled in the art.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the embodiment with description.
Claims (6)
1. a kind of production technology of brown paper, including：Log is used for raw material, through boiling, bleaches, screen, be beaten, be glued, remove
Slag, upper net forming, squeezing, drying, batch and produce body paper with press polish, it is characterised in that the mashing of the log is by over dry matter
Amount is than being 20~40:10~20:20~40:10~20:40~60:10~20:25 Oak Tree, birch, Chinese fir, cinnamomum camphora tree, horse
Tail pine, sago cycas and bagasse are mixed after being handled respectively through mashing, obtained mixing slurry, and the beating consistency of Oak Tree is 3%, is beaten
Degree is that 28 ° of SR, weight in wet base are 12g, and the beating consistency 3% of birch, beating degree are that 30 ° of SR, weight in wet base are 14g, the beating consistency of Chinese fir
It is that 29 ° of SR, weight in wet base are 12g for 3%, beating degree, the beating consistency of cinnamomum camphora tree is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g,
The beating consistency of masson pine is that 3%, beating degree is that 29 ° of SR, weight in wet base are 13g, and the beating consistency of sago cycas is that 3%, beating degree is 28 °
SR, weight in wet base are 14g, and the beating consistency of bagasse is that 3%, beating degree is that 32 ° of SR, weight in wet base are 15g；
Also include：In the body paper surface coatings, the coating is that mass ratio is 4~6:2~3:1~1.5:0.2 just
Methyl silicate, trim,ethylchlorosilane, the compound of methanol and agar, wherein, the absolute dry mass ratio of body paper and coating is 75~80:
20；
The brown paper impregnates hot-pressing processing before applying coating by resin；
The resin is that cyanurotriamide modified diallyl phthalate, azodiisobutyronitrile are that initiator, ethanol are solvent,
Impregnating heat pressing process is：120 DEG C of hot pressing temperature, pressure 0.2MPa, time 25min.
2. the production technology of brown paper as claimed in claim 1, it is characterised in that the temperature of boiling step is 135 DEG C.
3. the production technology of brown paper as claimed in claim 1, it is characterised in that blanching step includes passing sequentially through dense oxonium base
Delignification, hydrogen peroxide, three bleaching processes of hydroquinones, the slurry concentration of dense oxonium base delignification process is 6%, temperature
Degree is 65 DEG C, oxygen pressure is 250kPa, and the slurry concentration of Alkali Hydrogen Peroxide System is that 6%, bleaching pH value is 10, hydroquinones drift
The slurry concentration of white process is 3%, and wherein solvent is the magnetized water that 3h was soaked through cocoanut shell.
4. the production technology of brown paper as claimed in claim 3, it is characterised in that also to pass through matter at 40 DEG C after blanching step
Fraction is measured to rinse for 10% dilute hydrochloric acid solution.
5. the production technology of brown paper as claimed in claim 1, it is characterised in that squeezing step is using the nip of four-roller three and just
The unipress of squeezing, the line pressure in each area is：One nip 5.5MPa, two nip 6.5MPa, three nip 5MPa, four nips
6MPa。
6. the production technology of brown paper as claimed in claim 1, it is characterised in that calendaring step uses soft calender.
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| CN108086046A (en) * | 2017-12-12 | 2018-05-29 | 义乌市义南纸业有限公司 | A kind of high-effective water-proof brown paper and preparation method thereof |
| CN112431060B (en) * | 2020-11-13 | 2022-10-21 | 福建省青山纸业股份有限公司 | Production method of environment-friendly craft paper |
| CN113062146A (en) * | 2021-04-19 | 2021-07-02 | 岳阳林纸股份有限公司 | Antibacterial cultural paper and manufacturing method thereof |
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| CN86103060A (en) * | 1986-04-27 | 1987-04-22 | 刘能振 | The bleaching agent of forming by permanganate and reducing substances |
| CN101100829A (en) * | 2007-06-26 | 2008-01-09 | 永州湘江纸业有限责任公司 | Elaborate brown paper and producing method thereof |
| US8524374B2 (en) * | 2011-09-21 | 2013-09-03 | Kimberly-Clark Worldwide, Inc. | Tissue Product comprising bamboo |
| CN103422386B (en) * | 2012-05-25 | 2015-02-18 | 金东纸业（江苏）股份有限公司 | Kraft paper and making method thereof |
| CN104499342B (en) * | 2014-11-25 | 2017-07-14 | 南通新世纪机电有限公司 | The manufacturing process of water resistance brown paper |
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