CN108685512A - A kind of paper handkerchief and its manufacturing method and application - Google Patents
A kind of paper handkerchief and its manufacturing method and application Download PDFInfo
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- CN108685512A CN108685512A CN201810520521.8A CN201810520521A CN108685512A CN 108685512 A CN108685512 A CN 108685512A CN 201810520521 A CN201810520521 A CN 201810520521A CN 108685512 A CN108685512 A CN 108685512A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/16—Paper towels; Toilet paper; Holders therefor
-
- 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
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Paper (AREA)
Abstract
The present invention is a kind of paper handkerchief and its manufacturing method and application, and paper handkerchief wet strength provided by the present invention is high, is easy to degrade, environmental-friendly, the ingredient of the paper handkerchief includes:Long fiber content is 75-85wt%, and the content of short fibre content 14.5-24wt%, wet strength agent are 0.5-1wt%, wherein long stapled length is 1.5-3.5mm, and staple length is less than 1mm;The paper handkerchief of the application is added a small amount of environmentally friendly wet strength agent, paper handkerchief can be made to obtain higher wet strength, and be easy to degrade by the length range and proportioning of control paper pulp medium-length fibre and staple fiber.
Description
Technical field
The present invention relates to daily necessities fields, and in particular to a kind of preparation method of paper handkerchief and paper handkerchief.
Background technology
With the development of society, the improvement of people's living standards, the quantity and kind of various paper for daily uses in global range
It greatly increases, a various paper used for sexual life emerge one after another, and in particular for the paper of women, children and old man, kind is more
It is abundant.Tissue is increasingly entering in the daily life of the people, panoramic boxed facial napkin paper, paper handkerchief,
Napkin paper, pocket paper etc. greatly facilitate everybody life.Tissue is a kind of paper for daily use, it is at the fine and smooth, soft of paper
Soft, hygienic etc. requirement is than general toilet paper higher.
Common tissue meets insufficient strength after water on the market, easily festers and is slurried, and slurry group and paper end are left at the place of wiping, to making
User brings inconvenience and puzzlement, it is also difficult to meet the different demands of different crowd.Currently, in the prior art in order to improve paper
The intensity of towel met after water, improves the wet strength of paper handkerchief, it is common practice to be resolved by the way of wet strength agent is added.It is wet
Group interreaction, crosslinking of the strong agent by itself, resulting chemical crosslinking can will produce one staggeredly in fiber peripheral
Network structure, this chemical crossbond is difficult to be hydrolyzed by water again, to prevent the water suction of hemicellulose in paper, cellulose
Expansion reduces the intensity damage of paper under wet conditions, meanwhile, wet strength agent forms chemical bond (covalently with fibrin reaction
Key or ionic bond), while hydrogen bond existing for its inside being made to enhance.What is formed between wet strength agent reactive group and cellulose hydroxyl group is total to
Valence link will not be broken due to soaking for paper.Cationic polymer wet strength agent, also with the anion shape of cellulose surface
At ionic bond, these keys are all enough to prevent the interaction of fiber and water in terms of quantity and intensity, to produce wet strength.
Currently, domestic paper plant is to improve paper wet strength, it is common to use wet strength agent be resinae wet strength agent, for example, urea
Urea formaldehyde (UF), polyamide-epoxy chloropropane resin (PAF).Using PAE resin, paper obtains the mechanism of wet strength:1. being selfed
Online reason, water-soluble PAE resin form crosslinked reticular structure by fibers adsorption and when paper is dried.When paper and water connect
When touching, the reticular structure of the resin limits the rehydration of fiber and swelling;2. fiber and PAE resin are handed over by covalent bond
Connection, can provide corresponding wet strength.
Although the wet potent fruit of this resinoid is good, not degradable after solidification, broken reuse is more difficult, it is necessary to strong
The speed that could be completed repulping under conditions of alkali and strong oxidizer, and solve in a natural environment is also relative to relatively slow.Separately
Outside, content of organic chloride is high in polyamide-epoxy chloropropane resin, is unfavorable for environmental protection;Additionally its cost performance is not high.
Therefore, it is high to obtain a kind of wet strength, is easy to degrade, environmental-friendly novel paper towel and its corresponding production technology are
Urgent problem at present.
Invention content
One of the object of the invention is to provide a kind of wet strength height, is easy to degrade, environmental-friendly novel paper towel.The present inventor
It finds in the R&D and production of paper handkerchief, by controlling the length range and proportioning of paper pulp medium-length fibre and staple fiber, is added a small amount of
Environmentally friendly wet strength agent can make paper handkerchief obtain higher wet strength, and be easy to degrade.
Specifically, wet strength provided by the present invention is high, it is easy to degrade, the ingredient of environmental-friendly novel paper towel includes:
Long fiber content is 75-85wt%, and the content of short fibre content 14.5-24wt%, wet strength agent are 0.5-1wt%, wherein
Long stapled length is 1.5-3.5mm, and staple length is less than 1mm.
Preferably, the ingredient of the paper handkerchief by forming as follows:Long fiber content is 75-85wt%, and short fibre content is
The content of 14.5-24wt%, wet strength agent are 0.5-1wt%, wherein long stapled length is 1.5-3.5mm, and staple length is small
In 1mm.More preferably, the ingredient of the paper handkerchief by forming as follows:Long fiber content is 83.5wt%, and short fibre content is
The content of 15.75wt%, wet strength agent are 0.75wt%, wherein long stapled length is 1.5-3.5mm, and staple length is less than
1mm.It is further preferred that the long stapled length is 2.5-3.0mm, staple length 0.5-0.8mm.
The wet strength agent can be dialdehyde starch, polyethyleneimine or chitosan and combinations thereof, it is preferred that the wet strength agent can
It is dialdehyde starch or chitosan and combinations thereof, it is furthermore preferred that the wet strength agent is dialdehyde starch and chitosan, its ratio be 1:
2—1:3, it is further preferred that its ratio be 1:2.
The long fibre derives from needle-leaved wood fibre or bamboo fibre and combinations thereof, it is preferred that the bamboo fibre is from big
Bamboo fibre, 50-70 parts of the ratio needle-leaved wood fibre, 20-30 parts of bamboo fibre, it is preferred that 65 parts of leaf wood-fibred, bamboo fibre 35
Part.The staple fiber is from broad-leaved wood fiber, rice-straw fibre, sugarcane fiber, corn cob fiber or precarious grass fiber and its appoints
Meaning combination, it is preferred that the staple fiber derives from broad-leaved wood fiber, rice-straw fibre and sugarcane fiber, and its ratio be leaf wood fibres
40-60 parts of dimension, 20-30 parts of rice-straw fibre, 20-30 parts of sugarcane fiber, it is preferred that the ratio is 50 parts of broad-leaved wood fiber, rice
20 parts of grass fiber, 30 parts of sugarcane fiber.
The long fibre is obtained by following steps, and by 50-70 parts of needle-leaved wood fibre, 20-30 parts of bamboo fibre is prepared into wood
Slurry is controlled fibre length in 1.5-3.5mm, it is preferred that by pulping and defibrination by 65 parts of leaf wood-fibred, 35 parts of bamboo fibre
Fibre length is controlled in 2.5-3.0mm by pulping and defibrination at wood pulp.
The staple fiber is obtained by following steps, 40-60 parts of broad-leaved wood fiber, 20-30 parts of rice-straw fibre, sugarcane fiber
20-30 parts are prepared into wood pulp, by pulping and defibrination, fibre length are controlled less than 1mm, it is preferred that by broad-leaved wood fiber
50 parts, 20 parts of rice-straw fibre, 30 parts of sugarcane fiber be prepared into wood pulp, by pulping and defibrination, fibre length is controlled in 0.5-
0.75mm。
The two of the object of the invention are to provide a kind of wet strength height, are easy to degrade, the preparation side of environmental-friendly novel paper towel
Method is as follows:
(1) by 50-70 parts of needle-leaved wood fibre, 20-30 parts of bamboo fibre prepares long fibers wood pulp, by broad-leaved wood fiber 40-
60 parts, 20-30 parts of rice-straw fibre, 20-30 parts of sugarcane fiber be prepared into staple fiber wood pulp;
(2) water in long fibre wood pulp pulper, will be added to adjust a concentration of 4.0-6.0wt% of wood pulp, size degradation is after 8-15 minutes,
It by substance after gained pulping after defiberizing machine discongests fiber, is beaten by beater, by fibre cutting, sub-wire broom
Change, rear long fibre wood pulp must be kowtowed, the beating degree is 25 ° of SR-45 ° of SR, described to kowtow the long stapled length control of rear long fibre wood pulp
System is in 1.5-3.5mm;
(3) water in staple fiber wood pulp pulper, will be added to adjust a concentration of 6.0-8.0wt% of wood pulp, size degradation is after 8-20 minutes,
It by substance after gained pulping after defiberizing machine discongests fiber, is beaten by beater, by fibre cutting, sub-wire broom
Change, rear long fibre wood pulp must be kowtowed, the beating degree is 25 ° of SR-45 ° of SR, described to kowtow the long stapled length control of rear staple fiber wood pulp
System is less than 1mm;
(4) long fibre wood pulp and staple fiber wood pulp are pumped into blending chest by weight, are added and are added and is a certain amount of wet strong
Agent obtains mixing slurry, and the component ratio of the mixing slurry is:Long fibre wood pulp content is 75-85wt%, long fibre wood pulp content
Content for 14.5-24wt%, wet strength agent is 0.5-1wt%, and the wet strength agent is dialdehyde starch and chitosan, and its ratio be 1:
2;Mixing slurry water use regulation is slurried (5) and will be diluted to a concentration of 0.4-1wt% through fan pump at a concentration of 2.5~3.0%,
Into paper machine, by forming, squeezing and drying, product is finally made.
Third object of the present invention is to provide a kind of wet strength height, are easy to degrade, the use of environmental-friendly novel paper towel
On the way, can be used for preparing paper extraction, face tissue, oil-Absorbing Sheets, paper for kitchen.
Compared with prior art, the present invention has the following advantages:
1, the application by adjusting long fibre and staple fiber ratio and length, it is only necessary to a small amount of wet strength agent the case where
Under, you can so that face tissue obtains higher wet strength.
2, the application by adjusting long fibre and staple fiber ratio and length, without using other additives such as softening agent
In the case of, you can so that face tissue obtains higher pliability.
3, the wet strength agent that the application uses is environmentally friendly wet strength agent, by suitable for dialdehyde starch and chitosan
Proportioning can make paper handkerchief obtain higher wet strength in the case of a small amount of addition.
4. the paper handkerchief of the application not only has higher wet strength, but also is easy to degrade, different market is not only met
Demand, and be conducive to environmental protection.
Specific implementation mode
For a better understanding of the technical solution of the present invention, technology provided by the invention is described in detail with reference to embodiment
Scheme.
1 wet strength of embodiment is high, is easy to degrade, the preparation process of environmental-friendly novel paper towel
(1) by 65 parts of leaf wood-fibred, 35 parts of bamboo fibre prepares long fibers wood pulp, and 50 parts of broad-leaved wood fiber, straw is fine
20 parts of dimension, 30 parts of sugarcane fiber are prepared into staple fiber wood pulp;
(2) in long fibre wood pulp pulper, will add water adjust a concentration of 6.0wt% of wood pulp, size degradation after ten minutes, by gained
Substance is beaten after defiberizing machine discongests fiber by beater after pulping, and fibre cutting, wire-dividing broom purification must kowtow
Long fibre wood pulp afterwards, the beating degree are 35 ° of SR, described to kowtow the long stapled length control of rear long fibre wood pulp in 1.5-2mm;
(3) in staple fiber wood pulp pulper, will add water adjust a concentration of 6.0wt% of wood pulp, size degradation after ten minutes, by gained
Substance is beaten after defiberizing machine discongests fiber by beater after pulping, and fibre cutting, wire-dividing broom purification must kowtow
Long fibre wood pulp afterwards, the beating degree are 35 ° of SR, described to kowtow the long stapled length control of rear staple fiber wood pulp in 0.75-1mm;
(4) long fibre wood pulp and staple fiber wood pulp are pumped into blending chest by weight, are added and are added and is a certain amount of wet strong
Agent obtains mixing slurry, and the component ratio of the mixing slurry is:Long fibre wood pulp content is 80wt%, and long fibre wood pulp content is
The content of 19wt%, wet strength agent are 1wt%, and wherein wet strength agent is dialdehyde starch and chitosan, and its ratio be 1:2;By mixing slurry
Water use regulation is slurried at a concentration of 2.7%
(5) a concentration of 0.5wt% will be diluted to through fan pump, into paper machine, by forming, squeezing and drying, finally
Product is made.
2 wet strength of embodiment is high, is easy to degrade, and the preparation technology parameter of environmental-friendly novel paper towel adjusts (1) by leaf
65 parts of wood-fibred, 35 parts of bamboo fibre prepare long fibers wood pulp, by 50 parts of broad-leaved wood fiber, 20 parts of rice-straw fibre, sugarcane fiber
30 parts are prepared into staple fiber wood pulp;
(2) in long fibre wood pulp pulper, will add water adjust a concentration of 6.0wt% of wood pulp, size degradation after ten minutes, by gained
Substance is beaten after defiberizing machine discongests fiber by beater after pulping, and fibre cutting, wire-dividing broom purification must kowtow
Long fibre wood pulp afterwards, the beating degree are 35 ° of SR, described to kowtow the long stapled length control of rear long fibre wood pulp in 2.5-3.0mm;
(3) in staple fiber wood pulp pulper, will add water adjust a concentration of 6.0wt% of wood pulp, size degradation after ten minutes, by gained
Substance is beaten after defiberizing machine discongests fiber by beater after pulping, and fibre cutting, wire-dividing broom purification must kowtow
Long fibre wood pulp afterwards, the beating degree are 35 ° of SR, described to kowtow the long stapled length control of rear staple fiber wood pulp in 0.5-
0.75mm;
(4) long fibre wood pulp and staple fiber wood pulp are pumped into blending chest by weight, are added and are added and is a certain amount of wet strong
Agent obtains mixing slurry, and the component ratio of the mixing slurry is:Long fibre wood pulp content is 85wt%, and long fibre wood pulp content is
The content of 14wt%, wet strength agent are 1wt%;Mixing slurry water use regulation is slurried at a concentration of 2.7%
(5) a concentration of 0.5wt% will be diluted to through fan pump, into paper machine, by forming, squeezing and drying, finally
Product is made.
3 wet strength of embodiment is high, is easy to degrade, the preparation technology parameter adjustment of environmental-friendly novel paper towel
Using the preparation method of embodiment 1, wherein the component ratio of mixing slurry is adjusted to:Long fibre wood pulp content
83.5wt%, staple fiber wood pulp content are 15.75wt%, and the content of wet strength agent is 0.75wt%, and wherein wet strength agent forms sediment for dialdehyde
Powder and chitosan, its ratio be 1:2, wherein long stapled length control exists for 2.5-3.0mm, the control of section staple length
0.5-0.75mm.
4 wet strength of embodiment is high, is easy to degrade, the preparation technology parameter adjustment of environmental-friendly novel paper towel
Using the preparation method of embodiment 1, wherein the component ratio of mixing slurry is adjusted to:Long fibre wood pulp content
75wt%, staple fiber wood pulp content are 24.5wt%, and the content of wet strength agent is 0.5wt%, wherein wet strength agent be dialdehyde starch and
Chitosan, its ratio be 1:2, wherein the control of long stapled length be 2-2.5mm, the control of section staple length is in 0.1-
0.5mm.
5 wet strength of embodiment is high, is easy to degrade, the preparation technology parameter adjustment of environmental-friendly novel paper towel
Using the preparation method of embodiment 1, wherein the component ratio of mixing slurry is adjusted to:Long fibre wood pulp content
82.5wt%, staple fiber wood pulp content are 16.8wt%, and the content of wet strength agent is 0.7wt%, and wherein wet strength agent is dialdehyde starch
And chitosan, its ratio be 1:2, wherein long stapled length control exists for 2.5-3.0mm, the control of section staple length
0.5-0.75mm。
6 embodiment 1-5 of embodiment prepares the wet strength measurement of paper handkerchief
Tensile strength is to pass through F according to the assay method of standard GB/T 12914-2008 paper and cardboard tensile strength
RANK-PTI tensile strength testers detect.The detection of wet tensile (strength) is to soak paper slip central part, keeps both ends drying,
It is detected using FRANK-PTI tensile strength testers.Pliability measurement is adopted with the conventional methods in the field.1 institute of testing result table
Show.
1 embodiment 1-5 of table prepares the wet strength measurement result of paper handkerchief
As can be seen that the prepared paper handkerchief of the application is either in wet strength still in pliability from the result of table 1
The upper paper handkerchief that there is good effect, especially embodiment 3 to prepare, the paper handkerchief medium-length fibre content are 83.5wt%, staple fiber
Content is 15.75wt%, and the content of wet strength agent is 0.75wt%, wherein long stapled length is 2.5-3.0mm, staple fiber is long
Degree is 0.5-0.8mm, can reach the excellent effect that 5min wet strengths are 35.42%.
Embodiment 7:The degradation property that embodiment 1-5 prepares paper handkerchief measures
Ratio using the cellulase of 1000U/ml concentration, hemicellulase, Filter paperlyase, three kinds of enzymes is 2:2:0.5, it takes
50ml enzyme solutions are added in the enzymolysis buffer solution of 100ml, are digested to the paper slip for being cut into 15mm wide at 25 DEG C, hydrolysis result
As shown in table 2 below.
2 embodiment 1-5 of table prepares the degradation time comparison of paper handkerchief
| The time (h) of scraps of paper degradation | |
| Embodiment 1 | 6 |
| Embodiment 2 | 5.5 |
| Embodiment 3 | 4.5 |
| Embodiment 4 | 6 |
| Embodiment 5 | 5 |
As can be seen from the above table, paper of the invention has good degradation property, is conducive to environmental protection.
Above the present invention is described in detail with a general description of the specific embodiments, but in the present invention
On the basis of, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, not
These modifications or improvements on the basis of deviation spirit of that invention, belong to the scope of protection of present invention.
Claims (10)
1. a kind of paper handkerchief, which is characterized in that the ingredient of the paper handkerchief includes:Long fiber content is 75-85wt%, and staple fiber contains
Amount is 14.5-24wt%, and the content of wet strength agent is 0.5-1wt%, wherein long stapled length is 1.5-3.5mm, and staple fiber is long
Degree is less than 1mm.
2. paper handkerchief described in claim 1, which is characterized in that the ingredient of the paper handkerchief is by following material composition:Long fiber content
Content for 75-85wt%, short fibre content 14.5-24wt%, wet strength agent is 0.5-1wt%, wherein long stapled length
Degree is 1.5-3.5mm, and staple length is less than 1mm.
3. the paper handkerchief described in claim 1-2 any one, which is characterized in that the ingredient of the paper handkerchief is by following material composition:
Long fiber content is 83.5wt%, and the content of short fibre content 15.75wt%, wet strength agent are 0.75wt%, the long fibre
Length be 2.5-3.0mm, staple length 0.5-0.75mm.
4. the paper handkerchief described in claim 1-2 any one, which is characterized in that the wet strength agent be dialdehyde starch and chitosan,
Its ratio be 1:2—1:3.
5. the paper handkerchief described in claim 1-2 any one, which is characterized in that the wet strength agent be dialdehyde starch and chitosan,
Its ratio be 1:2.
6. the paper handkerchief described in claim 4, which is characterized in that the long fibre is from needle-leaved wood fibre or bamboo fibre and its group
It closes;The staple fiber derives from broad-leaved wood fiber, rice-straw fibre, sugarcane fiber, corn cob fiber or precarious grass fiber and its group
It closes.
7. the preparation method of paper handkerchief described in claim 1-6 any one, which is characterized in that the specific steps of the preparation method
For:It is as follows:
(1) by 50-70 parts of needle-leaved wood fibre, 20-30 parts of bamboo fibre prepares long fibers wood pulp, by 40-60 parts of broad-leaved wood fiber,
20-30 parts of rice-straw fibre, 20-30 parts of sugarcane fiber are prepared into staple fiber wood pulp;
(2) water in long fibre wood pulp pulper, will be added to adjust a concentration of 4.0-6.0wt% of wood pulp, size degradation is after 8-15 minutes, by institute
Substance is beaten by beater after defiberizing machine discongests fiber, fibre cutting, wire-dividing broom purification obtains after obtaining pulping
Kowtow rear long fibre wood pulp, the beating degree is 25 ° of SR-45 ° of SR, described to kowtow the long stapled length control of rear long fibre wood pulp and exist
1.5-3.5mm;
(3) water in staple fiber wood pulp pulper, will be added to adjust a concentration of 6.0-8.0wt% of wood pulp, size degradation is after 8-20 minutes, by institute
Substance is beaten by beater after defiberizing machine discongests fiber, fibre cutting, wire-dividing broom purification obtains after obtaining pulping
Rear long fibre wood pulp is kowtowed, the beating degree is 25 ° of SR-45 ° of SR, described to kowtow the long stapled length control of rear staple fiber wood pulp small
In 1mm;
(4) long fibre wood pulp and staple fiber wood pulp are pumped into blending chest by weight, are added and a certain amount of wet strength agent is added and obtains
Mixing slurry is obtained, the component ratio of the mixing slurry is:Long fibre wood pulp content is 75-85wt%, and staple fiber wood pulp content is
The content of 14.5-24wt%, wet strength agent are 0.5-1wt%, and the wet strength agent is dialdehyde starch and chitosan, and its ratio be 1:2;
Mixing slurry water use regulation is slurried at a concentration of 2.5~3.0%
(5) it will be diluted to a concentration of 0.4-1wt% through fan pump, finally made by forming, squeezing and drying into paper machine
Obtain product.
8. purposes of the paper handkerchief in preparing face tissue described in claim 1-6 any one.
9. purposes according to any one of claims 8, which is characterized in that the face-cloth is paper extraction.
10. purposes of the paper handkerchief described in claim 1-6 any one in preparing kitchen oil-Absorbing Sheets.
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| CN201810520521.8A CN108685512B (en) | 2018-05-25 | 2018-05-25 | Paper towel and manufacturing method and application thereof |
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| CN201810520521.8A CN108685512B (en) | 2018-05-25 | 2018-05-25 | Paper towel and manufacturing method and application thereof |
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| CN110699999A (en) * | 2019-10-18 | 2020-01-17 | 重庆理文卫生用纸制造有限公司 | Toilet paper performance improving method for processing commercial pulp based on different fiber characteristics |
| CN110820421A (en) * | 2019-11-13 | 2020-02-21 | 衢州龙游双熊猫纸业有限公司 | Production method of paper towel or kitchen paper and preparation method of paper |
| CN110904735A (en) * | 2019-12-11 | 2020-03-24 | 泰盛科技（集团）股份有限公司 | Method for making bamboo pulp household paper and household paper |
| CN111593610A (en) * | 2020-05-28 | 2020-08-28 | 龙游旭荣纸业有限公司 | Production process and production equipment of soft and smooth facial tissue |
| CN111979839A (en) * | 2020-07-30 | 2020-11-24 | 安徽瑞莱尔仪表有限公司 | Medical tissue and preparation method thereof |
| CN112911977A (en) * | 2018-11-30 | 2021-06-04 | 大王制纸株式会社 | Toilet paper |
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| CN114922001A (en) * | 2022-03-30 | 2022-08-19 | 金红叶纸业(南通)有限公司 | Household paper preparation method and pulp preparation system |
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