CN116145467A - Production process of low-cost high-grade special paper - Google Patents
Production process of low-cost high-grade special paper Download PDFInfo
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- CN116145467A CN116145467A CN202211731974.8A CN202211731974A CN116145467A CN 116145467 A CN116145467 A CN 116145467A CN 202211731974 A CN202211731974 A CN 202211731974A CN 116145467 A CN116145467 A CN 116145467A
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- cost high
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 26
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 18
- 238000004537 pulping Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 108090000790 Enzymes Proteins 0.000 claims abstract description 15
- 102000004190 Enzymes Human genes 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 11
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229940088598 enzyme Drugs 0.000 claims description 13
- 239000002736 nonionic surfactant Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 108010059892 Cellulase Proteins 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 6
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene Chemical compound C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 claims description 6
- 239000013067 intermediate product Substances 0.000 claims description 6
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- -1 retention aid Substances 0.000 claims description 6
- 229940106157 cellulase Drugs 0.000 claims description 4
- AOMUHOFOVNGZAN-UHFFFAOYSA-N N,N-bis(2-hydroxyethyl)dodecanamide Chemical compound CCCCCCCCCCCC(=O)N(CCO)CCO AOMUHOFOVNGZAN-UHFFFAOYSA-N 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 230000002421 anti-septic effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000010411 cooking Methods 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 229940031957 lauric acid diethanolamide Drugs 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000010893 paper waste Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 18
- 238000010009 beating Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention discloses a production process of low-cost high-grade special paper, which comprises the following steps of: preparing materials, namely selecting needle leaf pulp boards and low-price pulp boards as production raw materials, and selecting chemical auxiliary materials as auxiliary materials; the needle leaf pulp board accounts for 10-40% of the total amount of the materials; the needle leaf pulp board and the low-price pulp board are respectively crushed mechanically and mixed with water for pulp dispersion treatment to obtain needle leaf pulp and low-price pulp; respectively carrying out enzyme treatment on the two paper pulps; respectively performing free pulping on the paper pulp treated by the two enzymes; mixing the two pulps after free pulping; blending the mixed paper pulp, and adding chemical auxiliary materials; papermaking, squeezing, dewatering and drying to obtain paper. The beneficial effects are as follows: the manufacturing cost is low, the raw materials are saved, the process is reasonable, the quality of the produced high-grade special paper is high, the yield is high, and the requirement of mass industrialized production of the special paper can be met.
Description
Technical Field
The invention relates to the field of papermaking, in particular to a production process of low-cost high-grade special paper.
Background
The high-grade special paper is mainly used for manufacturing gift boxes, hanging tags and the like aiming at the high-end consumer product industry, and along with the improvement of life quality of people, the demand of high-end packaging is increased by 4% -5% in the future, especially, the demand of partial subdivision varieties is increased by more than 10% in the demand, and the demands of customers on the market of the high-grade special paper are increased increasingly.
The invention and the spread of the Chinese paper making technology make great contribution to the promotion of the development of human civilization. The production of paper and paperboard is the second world in the large country of pulping and papermaking industry, but the average possession is quite backward, and in the subdivision field of papermaking industry, especially high-grade special paper, the problems of raw material shortage, large resource and energy consumption, serious pollution, backward technology and the like exist. The existence of these problems seriously hampers the development of the paper industry in China. How to continuously develop the paper industry is a real problem faced by the pulping and papermaking industry on the premise of reasonably utilizing limited resources, reducing energy consumption and controlling environmental pollution.
Disclosure of Invention
The invention aims to provide the production process of the low-cost high-grade special paper, which has the advantages of low manufacturing cost, raw material saving, reasonable process, high quality of the produced high-grade special paper, high yield and capability of meeting the requirement of mass industrialized production of the special paper.
The invention is realized by the following technical scheme:
the invention relates to a production process of low-cost high-grade special paper, which comprises the following steps:
preparing materials, namely selecting needle leaf pulp boards and low-price pulp boards as production raw materials, and selecting chemical auxiliary materials as auxiliary materials; the needle leaf pulp board accounts for 10-40% of the total amount of the materials;
the needle leaf pulp board and the low-price pulp board are respectively crushed mechanically and mixed with water for pulp dispersion treatment to obtain needle leaf pulp and low-price pulp;
respectively carrying out enzyme treatment on the two paper pulps;
respectively performing free pulping on the paper pulp treated by the two enzymes;
mixing the two pulps after free pulping;
blending the mixed paper pulp, and adding chemical auxiliary materials;
papermaking, squeezing, dewatering and drying to obtain paper.
Furthermore, the above stock material also selects regenerated pulp as production raw material, and the regenerated pulp is directly treated by free pulping and then is mixed with needle pulp and low-price pulp.
Further, the needle pulp and the low-cost pulp obtained after the above-mentioned dispersion have a pulp concentration of 10%.
Further, the enzyme treatment comprises the steps of:
adjusting the pH value of the paper pulp to 5.0;
heating the pulp to 55 ℃ in a water bath;
adding cellulase enzyme solution, stirring uniformly, maintaining 55 ℃, stirring and mixing pulp once every 15min, and lasting for 90min;
high-temperature cooking is carried out on the paper pulp to inactivate the cellulase;
and (5) returning to room temperature, and finishing enzyme treatment.
Further, the chemical auxiliary materials comprise calcium carbonate, AKD emulsion, antiseptic bactericide, retention aid, bentonite and degasifier.
Further, the preparation of the regenerated pulp comprises the following steps:
pulping, adding water into waste paper, and crushing by mechanical equipment;
curing, and keeping the temperature at 55 ℃ for 30min;
diluting with water, and simultaneously adding nonionic surfactant and NaSiO 3 And NaOH;
and (3) floating for 8min at the temperature of 45 ℃ to obtain regenerated pulp.
Further, the temperature of the crushed pulp is 50 ℃ and lasts for 30min; the addition amount of the nonionic surfactant is 0.3%; naSiO (NaSiO) 3 The addition amount of (2) is 3%; the NaOH addition was 1%.
Further, the preparation of the nonionic surfactant comprises the following steps:
taking isophorone diisocyanate, and heating to 55 ℃ in a water bath;
slowly dropwise adding lauric acid diethanolamide and dibenzothiophene into isophorone diisocyanate, simultaneously adding chloroform, stirring and preserving heat for 2 hours to obtain an intermediate product;
and (3) quickly dripping acrylic ester into the intermediate product, heating to 75 ℃, stirring, and reacting for 2.5h at a constant temperature to obtain the nonionic surfactant.
The invention has the beneficial effects that: the manufacturing cost is low, the raw materials are saved, the process is reasonable, the quality of the produced high-grade special paper is high, the yield is high, and the requirement of mass industrialized production of the special paper can be met.
Drawings
Fig. 1: the process flow chart of the invention;
Detailed Description
The invention is further described with reference to the drawings and detailed description which follow:
examples: as shown in fig. 1, a production process of low-cost high-grade special paper comprises the following steps:
preparing materials, namely selecting needle leaf pulp boards and low-price pulp boards as production raw materials, and selecting chemical auxiliary materials as auxiliary materials; the chemical auxiliary materials comprise calcium carbonate, AKD emulsion, antiseptic bactericide, retention aid, bentonite and degasifying agent; the needle leaf pulp board accounts for 10-40% of the total amount of the materials;
the needle leaf pulp board and the low-price pulp board are respectively crushed mechanically and mixed with water for pulp dispersion treatment to obtain needle leaf pulp and low-price pulp; the concentration of the needle pulp and the low-price pulp obtained after the pulp dispersion is 10 percent;
respectively carrying out enzyme treatment on the two paper pulps; the enzyme treatment comprises the following steps: adjusting the pH value of the paper pulp to 5.0; heating the pulp to 55 ℃ in a water bath; adding cellulase enzyme solution, stirring uniformly, maintaining 55 ℃, stirring and mixing pulp once every 15min, and lasting for 90min; high-temperature cooking is carried out on the paper pulp to inactivate the cellulase; returning to room temperature to finish enzyme treatment;
respectively performing free pulping on the paper pulp treated by the two enzymes; compared with pulp which is not pretreated by cellulase, the pulp beating degree, tearing index and fracture length all show rising trend along with the increase of beating revolution, the whiteness is slightly reduced, but the reduction amplitude is not great. When the beating revolution exceeds 25000r, the beating degree rises slowly, and each strength is reduced. The beating degree of the enzyme-treated pulp can be improved by about 2 DEG SR at 25000r beating revolution, the tearing index is improved by 5%, the breaking length is improved by 4.2%, the burst index is improved by 12%, and the water retention value is improved by 5.14%. The cellulose is pretreated and pulped, the average length of the fiber is obviously increased, and the length weighted length and the quality weighted length of the fiber are synchronously increased. The width of the fiber becomes narrow, the content of the fine fiber is reduced, and the average kink index and the average curl index of the fiber are increased.
Mixing the two pulps after free pulping;
blending the mixed paper pulp, and adding chemical auxiliary materials;
papermaking, squeezing, dewatering and drying to obtain paper.
Furthermore, the preparation material also selects regenerated pulp as a production raw material, and the regenerated pulp is directly subjected to free pulping treatment and then is mixed with needle pulp and low-price pulp; the preparation of the regenerated pulp comprises the following steps: pulping, namely adding water into waste paper, crushing by mechanical equipment, wherein the pulping temperature is 50 ℃ and the pulping time lasts for 30min; curing, and keeping the temperature at 55 ℃ for 30min; diluting with water, and simultaneously adding nonionic surfactant and NaSiO 3 And NaOH; flotation at 45 DEG CAnd 8min, obtaining regenerated pulp. Wherein, the adding amount of the nonionic surfactant is 0.3%; naSiO (NaSiO) 3 The addition amount of (2) is 3%; the NaOH addition was 1%.
The preparation of the nonionic surfactant comprises the following steps:
taking isophorone diisocyanate, and heating to 55 ℃ in a water bath;
slowly dropwise adding lauric acid diethanolamide and dibenzothiophene into isophorone diisocyanate, simultaneously adding chloroform, stirring and preserving heat for 2 hours to obtain an intermediate product;
and (3) quickly dripping acrylic ester into the intermediate product, heating to 75 ℃, stirring, and reacting for 2.5h at a constant temperature to obtain the nonionic surfactant.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. The production process of the low-cost high-grade special paper is characterized by comprising the following steps of:
preparing materials, namely selecting needle leaf pulp boards and low-price pulp boards as production raw materials, and selecting chemical auxiliary materials as auxiliary materials; the needle leaf pulp board accounts for 10-40% of the total material;
the needle leaf pulp board and the low-price pulp board are respectively crushed mechanically and mixed with water for pulp dispersion treatment to obtain needle leaf pulp and low-price pulp;
respectively carrying out enzyme treatment on the two paper pulps;
respectively performing free pulping on the paper pulp treated by the two enzymes;
mixing the two pulps after free pulping;
blending the mixed paper pulp, and adding chemical auxiliary materials;
papermaking, squeezing, dewatering and drying to obtain paper.
2. The process for producing the low-cost high-grade special paper according to claim 1, which is characterized in that: the preparation material also selects regenerated pulp as a production raw material, and the regenerated pulp is directly subjected to free pulping treatment and then is mixed with needle pulp and low-price pulp.
3. The process for producing the low-cost high-grade special paper according to claim 1, which is characterized in that: the concentration of the needle pulp and the low-price pulp obtained after the pulp dispersion is 10 percent.
4. The process for producing a low-cost high-grade specialty paper according to claim 1, wherein said enzyme treatment comprises the steps of:
adjusting the pH value of the paper pulp to 5.0;
heating the pulp to 55 ℃ in a water bath;
adding cellulase enzyme solution, stirring uniformly, maintaining 55 ℃, stirring and mixing pulp once every 15min, and lasting for 90min;
high-temperature cooking is carried out on the paper pulp to inactivate the cellulase;
and (5) returning to room temperature, and finishing enzyme treatment.
5. The process for producing the low-cost high-grade special paper according to claim 1, which is characterized in that: the chemical auxiliary materials comprise calcium carbonate, AKD emulsion, antiseptic bactericide, retention aid, bentonite and degasifier.
6. The process for producing a low-cost high-grade specialty paper according to claim 2, wherein said regenerated pulp is prepared by the steps of:
pulping, adding water into waste paper, and crushing by mechanical equipment;
curing, and keeping the temperature at 55 ℃ for 30min;
diluting with water, and simultaneously adding nonionic surfactant and NaSiO 3 And NaOH;
and (3) floating for 8min at the temperature of 45 ℃ to obtain regenerated pulp.
7. The process for producing the low-cost high-grade special paper according to claim 6, which is characterized in that: the temperature of the crushed pulp is 50 ℃ and lasts for 30min; the addition amount of the nonionic surfactant is 0.3%; naSiO (NaSiO) 3 The addition amount of (2) is 3%; the NaOH addition was 1%.
8. The process for producing low-cost high-grade specialty paper according to claim 6, wherein said nonionic surfactant is prepared by the steps of:
taking isophorone diisocyanate, and heating to 55 ℃ in a water bath;
slowly dropwise adding lauric acid diethanolamide and dibenzothiophene into isophorone diisocyanate, simultaneously adding chloroform, stirring and preserving heat for 2 hours to obtain an intermediate product;
and (3) quickly dripping acrylic ester into the intermediate product, heating to 75 ℃, stirring, and reacting for 2.5h at a constant temperature to obtain the nonionic surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211731974.8A CN116145467A (en) | 2022-12-30 | 2022-12-30 | Production process of low-cost high-grade special paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211731974.8A CN116145467A (en) | 2022-12-30 | 2022-12-30 | Production process of low-cost high-grade special paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116145467A true CN116145467A (en) | 2023-05-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211731974.8A Pending CN116145467A (en) | 2022-12-30 | 2022-12-30 | Production process of low-cost high-grade special paper |
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| Country | Link |
|---|---|
| CN (1) | CN116145467A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07145584A (en) * | 1993-11-18 | 1995-06-06 | Lion Corp | Deinking agent and method for deinking waste paper |
| JPH07279078A (en) * | 1994-04-05 | 1995-10-24 | Honshu Paper Co Ltd | Preparation of bleached kraft pulp and paper produced from the pulp |
| CN102926267A (en) * | 2012-11-08 | 2013-02-13 | 山东晨鸣纸业集团股份有限公司 | Archival paper and manufacturing method thereof |
| CN104693880A (en) * | 2015-02-10 | 2015-06-10 | 江门职业技术学院 | Waste paper deinking agent with excellent performance and deinking method using same |
| CN105131700A (en) * | 2015-07-30 | 2015-12-09 | 陕西科技大学 | LIP type nonionic surfactant, preparation method and applications thereof |
| CN114150532A (en) * | 2021-12-01 | 2022-03-08 | 中冶美利云产业投资股份有限公司 | Pearlescent embossed base paper and preparation method thereof |
-
2022
- 2022-12-30 CN CN202211731974.8A patent/CN116145467A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07145584A (en) * | 1993-11-18 | 1995-06-06 | Lion Corp | Deinking agent and method for deinking waste paper |
| JPH07279078A (en) * | 1994-04-05 | 1995-10-24 | Honshu Paper Co Ltd | Preparation of bleached kraft pulp and paper produced from the pulp |
| CN102926267A (en) * | 2012-11-08 | 2013-02-13 | 山东晨鸣纸业集团股份有限公司 | Archival paper and manufacturing method thereof |
| CN104693880A (en) * | 2015-02-10 | 2015-06-10 | 江门职业技术学院 | Waste paper deinking agent with excellent performance and deinking method using same |
| CN105131700A (en) * | 2015-07-30 | 2015-12-09 | 陕西科技大学 | LIP type nonionic surfactant, preparation method and applications thereof |
| CN114150532A (en) * | 2021-12-01 | 2022-03-08 | 中冶美利云产业投资股份有限公司 | Pearlescent embossed base paper and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 孙萍萍;秦梦华;傅英娟;苗庆显;: "打浆前后酶处理对针叶木浆性能的影响", 造纸科学与技术, no. 01, pages 37 - 39 * |
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Effective date of registration: 20230728 Address after: 755099 301, Shimiao Village, Rouyuan Town, Shapotou District, Zhongwei, Ningxia (No. 286, Rouyuan Street) Applicant after: Ningxia Xinghe New Material Technology Co.,Ltd. Address before: 755000 Rouyuan Town, Shapotou District, Zhongwei City, Ningxia Hui Autonomous Region Applicant before: MCC MEILI CLOUD COMPUTING INDUSTRY INVESTMENT CO.,LTD. |