CN113249999B - Preparation method of bamboo velvet pulp - Google Patents
Preparation method of bamboo velvet pulp Download PDFInfo
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- CN113249999B CN113249999B CN202110565386.0A CN202110565386A CN113249999B CN 113249999 B CN113249999 B CN 113249999B CN 202110565386 A CN202110565386 A CN 202110565386A CN 113249999 B CN113249999 B CN 113249999B
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- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
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- 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
- D21C7/00—Digesters
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
- D21J1/04—Pressing
-
- 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
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The application discloses a preparation method of bamboo fluff pulp, which comprises the steps of cooking bamboo; bleaching the cooked pulp to obtain bamboo pulp; and carrying out vacuum pressing treatment on the bamboo pulp to dehydrate the bamboo pulp to form a pulp board. Through the mode, the bamboo fluff pulp has better raising performance and liquid absorption performance.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a preparation method of bamboo fluff pulp.
Background
At present, the development of the bamboo pulp industry in China has achieved obvious performance, the national bamboo pulp capacity reaches 200 million tons, the development of bamboo pulp making and paper making is greatly promoted, particularly, the development in the aspect of household paper has achieved a long promotion step, and the million tons of bamboo pulp household paper is achieved. Nevertheless, bamboo pulp accounts for less than 10% of the entire pulp industry and is still a supplemental product relative to wood pulp. In addition, under the current situation, the price of wood pulp at home and abroad is equal to that of bamboo pulp, the price advantage of the bamboo pulp does not exist, but the advantage of the bamboo pulp on the papermaking performance is still captured, and whether a supplementary product can be continuously developed or not under the new situation is unknown. Therefore, the bamboo industry is developing and needs to find new application fields with high added value to truly exert its own value. Researches show that the bamboo pulp fiber is preliminarily explored in the field of fluff pulp, certain feasibility is obtained, and the bamboo pulp fiber is superior to needle blade pulp in terms of cushion layer thickness, so that a practical possibility is provided for improving the bamboo resource value, and the bamboo pulp fiber and the fluff pulp fiber have a similar way in the commercial production process. The method has the most convenient means for converting the bamboo pulp fiber into the fluff pulp fiber. The global fluff pulp demand increases at a rate of 5% per year, the annual demand of China reaches 100 million tons, and the product market is large.
The existing method for preparing bamboo fluff pulp generally adopts the addition of partial wood pulp and fiber debonding agent, and achieves the purpose of opening the bamboo pulp board by reducing the bonding between fibers. This provides conditions for its fluffing utilization. However, the negative effect of the method is that the water absorption capacity and the liquid absorption speed are affected, and the most key indexes of the bamboo pulp are that the water absorption speed is high, the water absorption capacity is high, the performance of the bamboo pulp is not changed, and the bamboo pulp does not belong to the bamboo fluff pulp in the true sense.
Disclosure of Invention
The technical problem that the application mainly solves is to provide a preparation method of bamboo fluff pulp, which can enable the bamboo fluff pulp to have better raising performance and liquid absorption performance.
In order to solve the technical problems, the invention adopts a technical scheme that: providing a preparation method of bamboo velvet pulp, wherein the preparation method of the bamboo velvet pulp comprises the steps of stewing bamboo; bleaching the cooked pulp to obtain bamboo pulp; and carrying out vacuum squeezing treatment on the bamboo pulp to dehydrate the bamboo pulp to form a pulp board.
Wherein, the vacuum pressing treatment of the bamboo pulp comprises the following steps: and (3) carrying out vacuum squeezing treatment on the bamboo pulp by using a vacuum net clamping former.
Wherein, the vacuum pressing treatment of the bamboo pulp comprises the following steps: carrying out steam heating treatment on the bamboo pulp, and simultaneously carrying out vacuum squeezing treatment on the heated bamboo pulp; and carrying out rolling and squeezing treatment on the bamboo pulp subjected to vacuum squeezing treatment to obtain the pulp board.
And carrying out vacuum squeezing treatment on the bamboo pulp by adopting a gradient pressurization mode, wherein the pressurization pressure of the first stage is 0-0.05 MPa, the pressurization pressure of the second stage is 0.05-0.10 MPa, and the pressurization pressure of the third stage is 0.10-0.30 MPa.
Wherein, the vacuum pressing treatment of the bamboo pulp comprises the following steps: the squeezing dryness of the bamboo pulp after the vacuum squeezing treatment is 30-55%.
Wherein, after the bamboo pulp is processed by vacuum pressing, the method comprises the following steps: and drying the pulp board by using a hot air heating, infrared heating or microwave heating mode, wherein the moisture content of the dried pulp board is 6-12%.
Wherein, the bamboo material is steamed and boiled and processed by the following steps: the bamboo wood is subjected to cooking treatment by adopting a replacement cooking mode, the amount of alkali used for cooking is 12-20%, the vulcanization degree is 16-25%, the addition amount of a cooking auxiliary agent is 0.02-0.1%, the temperature of the first stage of cooking is 90-140 ℃, the temperature preservation time is 30-240 minutes, the temperature of the second stage of cooking is 145-165 ℃, and the temperature preservation time is 0-120 minutes.
Wherein, the bamboo material is steamed and boiled and processed by the following steps: adding cooking alkali into the cooking slurry in batches, wherein the alkali dosage in the first heat preservation stage is 10-17%, and the alkali dosage in the second heat preservation stage is 3-10%.
Wherein, the bamboo wood is steamed and boiled and processed to include: the kappa number of the cooked slurry is 12-34, and the cleanliness of white liquor is less than or equal to 40 ppm.
Wherein, the bleaching treatment of the bamboo wood comprises the following steps: carrying out one-stage bleaching treatment under the conditions that the concentration of the slurry is 10-12%, the using amount of chlorine dioxide is 0.5-1.5%, the reaction temperature is 40-80 ℃, and the reaction pH is 3-4; carrying out two-stage bleaching treatment under the conditions that the concentration of the slurry is 10-12%, the dosage of alkali is 0.2-3%, the dosage of hydrogen peroxide is 0.3-0.5%, the oxygen pressure is 1-3 kg, and the reaction temperature is 60-95 ℃; the three-stage bleaching treatment is carried out under the conditions that the concentration of the slurry is 10-12%, the dosage of chlorine dioxide is 0.2-0.8%, the reaction temperature is 40-80 ℃, and the reaction pH is 4-5.
Wherein, the bamboo wood comprises the following steps before being bleached: performing oxygen delignification treatment on the bamboo pulp, wherein the consumption of magnesium sulfate for the oxygen delignification treatment is 0.5-1.0%, the consumption of hydrogen peroxide is 0.5-2.0%, the concentration of the pulp is 10-12%, and the reaction temperature is 80-100 ℃.
The invention has the beneficial effects that: the preparation method of the bamboo fluff pulp is characterized in that the bamboo fluff pulp is prepared by changing a bamboo pulping process, strengthening vacuum dehydration and vacuum squeezing technologies, adjusting the longitudinal and transverse distribution of fibers during pulp board forming and using no debonding agent, so that the product has better fluff raising performance and liquid absorption performance.
Furthermore, the raising performance of the bamboo pulp board is improved by adopting a physical method, the raising energy consumption of downstream sanitary enterprises is reduced, and the negative effects of the reduction of the water absorption and the reduction of the fluffy degree of the fibers caused by using a debonding agent are avoided.
The absorption performance of the obtained bamboo pulp fiber is obviously changed, and the product index reaches the national standard requirement of the existing fluff pulp and is close to that of imported products.
The obtained bamboo pulp fiber has high single fiber strength and good elasticity, and the later stage pulp board is easy to disperse due to napping and is not easy to be torn off by a napper.
The process of the existing papermaking pulp is little modified, and the investment is saved.
The implementation technology is easy to implement on the existing common pulping process flow, and is easy for industrial popularization and large-scale production.
Detailed Description
In order to make the purpose, technical solution and effect of the present application clearer and clearer, the present application is further described in detail by referring to the following embodiments.
The application provides a preparation method of bamboo fluff pulp, through changing the bamboo timber pulping technology, reinforce vacuum dehydration and vacuum squeezing technique, through the distribution of moving about freely and quickly of fibre when adjusting the pulp board shaping, do not use the debonding agent, make the product have better raising performance and imbibition performance, reach current market import bleaching needle-leaved wood fluff pulp level.
The preparation method of the bamboo fluff pulp specifically comprises the following steps:
s1: bamboo is provided.
The bamboo materials used for preparing the bamboo fluff pulp are Sasa albo-marginata, Mianzhu, Juhuang bamboo and Siji bamboo, the bamboo fiber cavities of the several types of bamboo are large, the length-width ratio is large, the impurity cells are less than other bamboo types, and the liquid absorption property and the napping property are good. The age of bamboo is selected from more than 2 years, preferably 2-4 years, more preferably 2-3 years.
S2: and (5) cooking the bamboo wood.
The bamboo can be cooked by replacement cooking.
Specifically, the bamboo is cooked by two-stage technology, wherein one-stage low-temperature cooking is firstly carried out, and then the temperature is increased to carry out one-stage high-temperature cooking.
Adding cooking alkali into the slurry in the cooking process, wherein the effective alkali dosage in the low-temperature stage is 10-17%, and the effective alkali dosage in the high-temperature stage is 3-10%; the total effective alkali consumption for cooking is 12-20%, preferably the effective alkali consumption is 12-18%, and more preferably the effective alkali consumption is 12-15%.
And adding a cooking aid in the cooking temperature rise stage, wherein the addition amount of the cooking aid is 0.02-0.1%, preferably the addition amount of the cooking aid is 0.05-0.1%, and more preferably the addition amount of the cooking aid is 0.05-0.1%. Wherein, the addition amount of the cooking auxiliary agent is relative to the weight portion of the oven-dried bamboo wood. The cooking assistant is a common assistant without anthraquinone in the field of bamboo pulping.
The degree of cure of the cooking is 16-25%, preferably 16-22%.
The cooking adopts a sulfate method, and the white liquor cleanliness requirement is less than or equal to 40 ppm.
The low-temperature (first-stage) heat preservation temperature of the cooking is 90-140 ℃, the heat preservation time is 30-240 minutes, the high-temperature (second-stage) heat preservation temperature of the cooking is 145-165 ℃, and the heat preservation time is 0-120 minutes. Preferably, the low-temperature heat preservation temperature of the cooking is 100-140 ℃, the heat preservation time is 30-220 minutes, the high-temperature heat preservation temperature of the cooking is 148-160 ℃, and the heat preservation time is 0-90 minutes. More preferably, the low-temperature heat preservation temperature of the cooking is 105-135 ℃, the heat preservation time is 60-200 minutes, the high-temperature heat preservation temperature of the cooking is 150-160 ℃, and the heat preservation time is 30-60 minutes.
The kappa number of the cooked slurry is 12-34.
S3: and bleaching the cooked pulp to obtain the bamboo pulp.
Wherein, the boiled bamboo pulp is cleaned by pulp washing equipment, and impurities and non-digestion products are screened out by screening equipment to obtain the unbleached bamboo pulp cellulose dissociated into single fibers. The resulting pulp may be subjected to oxygen delignification and bleaching.
The dosage of magnesium sulfate used for oxygen delignification is 0.5 to 1.0 percent, the dosage of hydrogen peroxide is 0.5 to 2 percent, the dosage of hydrogen peroxide is preferably 0.5 to 1.5 percent, the dosage of hydrogen peroxide is more preferably 0.5 to 1.0 percent, the concentration of slurry is 10 to 12 percent, the reaction temperature is 80 to 100 ℃, the reaction temperature is preferably 90 to 100 ℃, the reaction temperature is more preferably 95 to 100 ℃, and the reaction time is 30 to 60 minutes.
The bleaching adopts chlorine dioxide bleaching, the chlorine dioxide bleaching adopts a bleaching mode of protective strength, and the general process flow is D O -E OP -D 1 。
D O Segment bleaching parameters: the concentration of the slurry is 10-12%, ClO 2 The amount of ClO is 0.5-1.5% (calculated by available chlorine), preferably ClO 2 The amount of the catalyst is 0.8-1.3%, and ClO is more preferable 2 The using amount is 0.8-1.2%, the reaction temperature is 40-80 ℃, the preferable reaction temperature is 45-80 ℃, the more preferable reaction temperature is 45-65 ℃, the reaction pH is 3-4, and the reaction time is 1-3 hours.
E OP Segment bleaching parameters: the concentration of the slurry is 10-12%, the using amount of NaOH is 0.2-3%, the preferable using amount of NaOH is 0.2-2%, the more preferable using amount of NaOH is 0.5-1.5%, the using amount of hydrogen peroxide is 0.3-0.5%, the oxygen pressure is 1-3 kg, the reaction temperature is 60-95 ℃, the reaction time is 1-3 hours, the preferable reaction time is 1.5-2.5 hours, and the more preferable reaction time is 1.5-2 hours.
D 1 Segment bleaching parameters: the concentration of the slurry is 10-12%, ClO 2 The amount of ClO is 0.2-0.8% (calculated by available chlorine), preferably ClO 2 The amount of the catalyst is 0.2-0.6%, and ClO is more preferable 2 The using amount is 0.3-0.5%, the reaction temperature is 40-80 ℃, the preferable reaction temperature is 40-70 ℃, the more preferable reaction temperature is 45-65 ℃, the initial pH of the reaction is 4-5, and the reaction time is 2-6 hours.
Wherein the pulp is treated before the oxygen delignification treatment or after the bleaching.
Specifically, sodium hydroxide, potassium hydroxide or other alkaline hydroxides or alkaline salts can be used as the treatment chemicals, the alkali dosage is 2-8% (based on the weight of the oven dry pulp), the pulp concentration is 10-20%, the treatment temperature is 40-95 ℃, and the treatment time is 1-4 hours.
In one embodiment, the pulp is further purified before the pulp sheet is manufactured, and non-fiber cells such as stone cells and parenchyma cells in the pulp are removed to increase the ratio of fiber cells.
S4: and carrying out squeezing treatment on the bamboo pulp to dehydrate the bamboo pulp to form a pulp board.
Wherein the pulp can be pressed by using a vacuum pressing technology.
Preferably, the vacuum wire clamping former is used for squeezing treatment, and wire clamping dehydration forming is adopted through the wire part, so that the dryness of the wire part dehydration slurry can be improved. More preferably vacuum compound pressing. Further adopting a vacuum net clamping forming matched steam box, a vacuum composite pressing and big roller pressing dehydration process before the drying part, emphasizing vacuum dehydration, heating a wet pulp plate to improve the dehydration effect and reduce linear pressure dehydration; the dehydration is improved through the steam box heating, promotes the net part dehydration thick liquids quality. The speed ratio of the pulp screen can be adjusted, the transverse arrangement of the pulp on the screen table is increased, and the press dryness is controlled to be 30-55%.
In one embodiment, the bamboo pulp may be subjected to vacuum pressing by gradient pressing, and the pressing is performed first by light pressing and then by heavy pressing. The pressurizing pressure of the first pressing pneumatic tire is 0-0.05 MPa, the pressurizing pressure of the second pressing is 0.05-0.10 MPa, and the pressurizing pressure of the third pressing is 0.10-0.30 MPa.
S5: and drying the pulp board.
Can have one section preheating process before advancing the drying cabinet for promote and squeeze the back pulp board temperature, preheating device can adopt hot-blast, infrared heating, microwave heating or other can rapid heating pulp board's industrial equipment, its aim at make the inside hydrone of pulp board get into the evaporation condition in advance.
The final moisture of the pulp board can be controlled to be 6-12% by adopting an air cushion type drying box in the formal drying process.
S6: and (5) reeling, slitting and rewinding.
The finished product and package can be finished by adopting a special high-gram-weight coiling device and a slitting and rewinding device. In the above embodiment, by changing the bamboo pulping process, strengthening the vacuum dehydration and vacuum squeezing technology, and adjusting the longitudinal and transverse distribution of the fibers during the forming of the pulp sheet, the product has better raising performance and liquid absorption performance without using a debonding agent.
Furthermore, the raising performance of the bamboo pulp board is improved by adopting a physical method, the raising energy consumption of downstream sanitary enterprises is reduced, and the negative effects of the reduction of the water absorption and the reduction of the fluffy degree of the fibers caused by using a debonding agent are avoided.
The absorption performance of the obtained bamboo pulp fiber is obviously changed, and the product index reaches the national standard requirement of the existing fluff pulp and is close to that of imported products.
The obtained bamboo pulp fiber has high single fiber strength, good elasticity, easy dispersion of later stage pulp board, and difficult fiber breakage by a fluff raising device.
The process of the existing papermaking pulp is little modified, and the investment is saved.
The implementation technology is easy to implement on the existing common pulping process flow, and is easy for industrial popularization and large-scale production.
The performance of the product prepared by the preparation method of the congratulatory fluff pulp is detected and compared with the existing bamboo fluff pulp product, and the details are shown in table 1.
TABLE 1 bamboo fluff pulp Properties parameters
The data show that the main technical indexes of the obtained product meet the requirements of imported products, and the absorptivity of the product is obviously superior to that of papermaking bamboo pulp.
The above description is only for the purpose of illustrating embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the claims and their equivalents, and all modifications that can be made by the use of the structures and equivalent processes of the present invention or applied to other related fields, directly or indirectly, are intended to be covered by the scope of the present invention.
Claims (6)
1. The preparation method of the bamboo velvet pulp is characterized by comprising the following steps:
cooking the bamboo;
bleaching the cooked pulp to obtain bamboo pulp;
carrying out vacuum squeezing treatment on the bamboo pulp to dehydrate the bamboo pulp to form a pulp board;
the vacuum squeezing treatment of the bamboo pulp comprises the following steps: carrying out vacuum squeezing treatment on the bamboo pulp by using a vacuum net clamping former, or,
carrying out steam heating treatment on the bamboo pulp, and simultaneously carrying out vacuum squeezing treatment on the heated bamboo pulp;
carrying out rolling and squeezing treatment on the bamboo pulp subjected to vacuum squeezing treatment to obtain a pulp board;
and the number of the first and second groups,
the vacuum squeezing treatment of the bamboo pulp comprises the following steps:
carrying out vacuum squeezing treatment on the bamboo pulp by adopting a gradient pressurization mode, wherein the pressurization pressure of the first stage is 0-0.05 MPa, the pressurization pressure of the second stage is 0.05-0.10 MPa, and the pressurization pressure of the third stage is 0.10-0.30 MPa;
the bamboo wood is subjected to cooking treatment by adopting a replacement cooking mode, the amount of alkali used for cooking is 12-20%, the vulcanization degree is 16-25%, the addition amount of a cooking auxiliary agent is 0.02-0.1%, the first-stage heat preservation temperature for cooking is 90-140 ℃, the heat preservation time is 30-240 minutes, the second-stage heat preservation temperature for cooking is 145-165 ℃, the heat preservation time is 0-120 minutes, and the cooking auxiliary agent does not contain anthraquinone auxiliary agent.
2. The method for preparing bamboo fluff pulp according to claim 1, wherein the vacuum pressing treatment of the bamboo pulp comprises:
the squeezing dryness of the bamboo pulp after the vacuum squeezing treatment is 30-55%.
3. The method for preparing bamboo fluff pulp as claimed in claim 1, wherein the vacuum pressing treatment of the bamboo pulp comprises:
and drying the pulp board by using a hot air heating, infrared heating or microwave heating mode, wherein the moisture content of the dried pulp board is 6-12%.
4. The method for preparing bamboo fluff pulp according to claim 1, wherein the cooking of bamboo comprises:
adding cooking alkali into the cooking slurry in batches, wherein the alkali dosage in the first heat preservation stage is 10-17%, and the alkali dosage in the second heat preservation stage is 3-10%;
the kappa number of the cooked slurry is 12-34, and the cleanliness of white liquor is less than or equal to 40 ppm.
5. The method for preparing bamboo fluff pulp according to claim 1, wherein the bleaching treatment of bamboo wood comprises:
carrying out one-stage bleaching treatment under the conditions that the concentration of the slurry is 10-12%, the using amount of chlorine dioxide is 0.5-1.5%, the reaction temperature is 40-80 ℃, and the reaction pH is 3-4;
carrying out two-stage bleaching treatment under the conditions that the concentration of the slurry is 10-12%, the dosage of alkali is 0.2-3%, the dosage of hydrogen peroxide is 0.3-0.5%, the oxygen pressure is 1-3 kg, and the reaction temperature is 60-95 ℃;
the three-stage bleaching treatment is carried out under the conditions that the concentration of the slurry is 10-12%, the dosage of chlorine dioxide is 0.2-0.8%, the reaction temperature is 40-80 ℃, and the reaction pH is 4-5.
6. The method for preparing bamboo fluff pulp according to claim 1, wherein the step of bleaching bamboo wood comprises:
and carrying out oxygen delignification treatment on the bamboo pulp, wherein the consumption of magnesium sulfate for the oxygen delignification treatment is 0.5-1.0%, the consumption of hydrogen peroxide is 0.5-2.0%, the pulp concentration is 10-12%, and the reaction temperature is 80-100 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114687234B (en) * | 2022-03-31 | 2023-06-16 | 华南理工大学 | Method for preparing fluff pulp by utilizing bamboo and fluff pulp prepared by same |
| CN114855496B (en) * | 2022-04-15 | 2023-10-20 | 泰盛科技（集团）股份有限公司 | Bamboo fluff pulp preparation process and product thereof |
| CN114960250B (en) * | 2022-05-27 | 2023-03-14 | 泰盛科技（集团）股份有限公司 | Fluff pulp preparation method and fluff pulp |
| CN116411470A (en) * | 2023-04-18 | 2023-07-11 | 泰盛科技（集团）股份有限公司 | Bamboo fluff pulp preparation method and bamboo fluff pulp |
| CN116623457B (en) * | 2023-05-26 | 2024-04-02 | 天津科技大学 | Natural color bamboo fiber fluff pulp board and preparation method thereof |
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| CN1103124A (en) * | 1994-06-17 | 1995-05-31 | 重庆西泉造纸厂 | Bamboo material fibre fluff pulp and making method |
| CN101148836A (en) * | 2007-11-12 | 2008-03-26 | 宜宾长毅浆粕有限责任公司 | Paper-making-stage bamboo wood pulp plate denaturalization producing technique |
| CN105625076A (en) * | 2016-03-25 | 2016-06-01 | 安徽格义循环经济产业园有限公司 | Environment-friendly unbleached paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103124A (en) * | 1994-06-17 | 1995-05-31 | 重庆西泉造纸厂 | Bamboo material fibre fluff pulp and making method |
| CN101148836A (en) * | 2007-11-12 | 2008-03-26 | 宜宾长毅浆粕有限责任公司 | Paper-making-stage bamboo wood pulp plate denaturalization producing technique |
| CN105625076A (en) * | 2016-03-25 | 2016-06-01 | 安徽格义循环经济产业园有限公司 | Environment-friendly unbleached paper |
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