CN113832762A - Method for manufacturing degradable membrane material by bamboo pulp thick black liquor - Google Patents
Method for manufacturing degradable membrane material by bamboo pulp thick black liquor Download PDFInfo
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- CN113832762A CN113832762A CN202111035930.7A CN202111035930A CN113832762A CN 113832762 A CN113832762 A CN 113832762A CN 202111035930 A CN202111035930 A CN 202111035930A CN 113832762 A CN113832762 A CN 113832762A
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- 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
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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
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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Abstract
The invention discloses a method for manufacturing degradable membrane material by bamboo pulp thick black liquor, which comprises the steps of crushing, pulping, concentrating, degrading, proportioning, net surfing molding, squeezing, drying and packaging, and is characterized in that the raw material adopts bamboo fiber pulp, net surfing molding is carried out after 20-30% high-concentration pulping, net surfing concentration can be adjusted to 0.12-0.32%, pH value is 6.3-7.1, the molded raw material needs to be subjected to compression roller operation, and the squeezing degree is ensured to be 50-53%, and the method comprises the following steps: (1) crushing: selecting raw materials, and delivering the raw materials to crushing equipment for crushing treatment; (2) pulping: screening raw materials, injecting a raw material solution, steaming and boiling at high temperature, washing bamboo pulp, screening the bamboo pulp and manufacturing the bamboo pulp; (3) concentration: and (5) concentrating the bamboo pulp by using a vacuum concentrator. The invention takes the bamboo fiber as the raw material, not only expands the raw material source of the membrane material and relieves the situation of tension supply of wood pulp, but also improves the performance of the mulching paper to a certain extent and provides a new production process for the pulping industry.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking, in particular to a method for manufacturing a degradable membrane material by using thick black liquor of bamboo pulp.
Background
The mulching cultivation is an excellent agricultural yield-increasing technology, and can effectively control the temperature and humidity of soil, reduce the loss of water and nutrients, and prevent and control weed production, so that a favorable local growth environment can be created for crops. However, the conventional mulching film generally adopts polymer materials and is difficult to degrade in soil by itself. In response to this problem, researchers in the prior art have developed various degradable mulching films, one of which is a paper mulching film (also referred to as mulching film paper or plant fiber mulching film). The mulching film paper takes plant fiber as a raw material, microorganisms in soil can decompose the plant fiber, and the decomposition product can be used as organic fertilizer to improve the soil fertility and is widely accepted by the market. However, the raw materials of the current mulching paper are mainly wood fibers or grass fibers, which not only have limited raw material sources, but also have high requirements on paper pulp and complex process. In addition, the mulching film paper prepared by the conventional process needs to be improved in the aspects of air permeability, heat sealability, light resistance and the like.
China has abundant non-wood resources. The bamboos are mainly distributed in Fujian, Sichuan, Guangxi, Guangdong, Guizhou, Yunnan, Zhejiang and other provinces in south, and have obvious regionality and territoriality. Bamboo belongs to a long medium fiber raw material, has large length-width ratio, high cellulose content and low ash content (higher than wood), and is an excellent papermaking fiber raw material.
The fiber cells of the bamboo raw material generally account for 60-70% of the total area of the cells, and are slightly lower than wood and higher than common grass. The bamboo fiber form is different from wood, the wood fiber has grain holes, the bamboo fiber has little and very small grain holes, the bamboo fiber property is similar to broad leaf wood, and is better than general grass, and the bamboo fiber form is not much different among various types and genera. The bamboo fiber has the comprehensive morphological characteristics that: the fiber is slender, the wall thickness cavity is small, the density is high, the fiber is stiffer, and the transparency is high. The bamboo fiber has strong ultraviolet resistance, the ultraviolet transmittance of the bamboo fiber is less than 5% in a 200-400 nm region, and the bamboo fiber has antibacterial property, good usability and environmental protection property, and is a natural environment-friendly green fiber. In this case, if degradable mulching film paper can be produced using bamboo pulp as a raw material, it is expected to expand the source of the raw material and improve the product performance.
Disclosure of Invention
The invention aims to provide a method for manufacturing a degradable membrane material by using thick black liquor of bamboo pulp, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for preparing degradable membrane material from thick black liquor of bamboo pulp includes such steps as breaking, pulping, concentrating, degrading, proportioning, shaping by passing through net, squeezing, drying and packing, and features that the bamboo fibre pulp is used as raw material, and after 20-30% pulping, the bamboo fibre pulp is passed through net to obtain the membrane material with adjustable net concentration of 0.12-0.32% and pH value of 6.3-7.1, and the raw material is pressed by roller to obtain 50-53% of squeezing degree.
2. The method for manufacturing the degradable membrane material by using the bamboo pulp thick black liquor as claimed in claim 1, which is characterized by comprising the following steps:
(1) crushing: selecting raw materials, and delivering the raw materials to crushing equipment for crushing treatment;
(2) pulping: screening raw materials, injecting a raw material solution, steaming and boiling at high temperature, washing bamboo pulp, screening the bamboo pulp and manufacturing the bamboo pulp;
(3) concentration: concentrating the bamboo pulp by using a vacuum concentrator;
(4) and (3) degradation: pouring the bamboo pulp into a degradation cabin, adjusting the temperature and air pressure change in the degradation cabin, and uniformly stirring the bamboo pulp for 30 minutes;
(5) proportioning: injecting reaction stock solution into the degradation cabin to accelerate the degradation rate of the bamboo pulp;
(6) and (3) net surfing molding: the concentration of the upper net can be adjusted to 0.12-0.32%, the pH value is 6.3-7.1, and the dryness after forming is 24-28%;
(7) squeezing: the molded raw materials need to be subjected to compression roller operation, and the degree of compression is ensured to be 50-53%;
(8) and (3) drying: placing the paper in a drying device to facilitate the drying rate;
(9) packaging: the paper is accomodate and is deposited, carries out the transportation simultaneously and stands up.
As a further scheme of the invention, in the pulp screening step, a pressure screen is used for screening the bamboo pulp, impurities in the bamboo pulp are separated and used for purifying the bamboo pulp, and the later-stage quality of paper is ensured.
As a further scheme of the invention, the raw materials of the bamboo are selected from moso bamboo, green bamboo or sympodial bamboo in the material selection step.
As a further scheme of the invention, the paper is pressed for three times in the pressing step, and the three pressing values are respectively 50kn/m, 80kn/m and 120 kn/m.
Compared with the prior art, the invention has the beneficial effects that:
the invention improves the traditional pulping process, changes the raw material from wood pulp into bamboo pulp, widens the source of the paper pulp raw material and solves the situation of the shortage of wood pulp supply. Meanwhile, the characteristics of the chlamydomonas moth bamboo pulp and the improvement of the pulping process are changed, the air permeability of the produced film material is greatly improved, and the film material has good heat sealability, light resistance, heat resistance and unique aroma retention of the bamboo. The manufactured paper has smooth and beautiful appearance and overflows fragrance. Accords with the national concept of green ecological economic development and is beneficial to the coordinated development of ecological environmental protection and market economy.
Detailed Description
The method for manufacturing the degradable membrane material by using the bamboo pulp thick black liquor comprises the steps of crushing, pulping, concentrating, degrading, proportioning, net surfing molding, squeezing, drying and packaging, and is characterized in that the bamboo fiber pulp is used as a raw material, net surfing molding is carried out after 20-30% high-concentration pulping, the net surfing concentration can be adjusted to 0.12-0.32%, the pH value is 6.3-7.1, and the molded raw material needs to be subjected to compression roller operation, so that the squeezing degree is 50-53%.
2. The method for manufacturing the degradable membrane material by using the bamboo pulp thick black liquor as claimed in claim 1, which is characterized by comprising the following steps:
(1) crushing: selecting raw materials, and delivering the raw materials to crushing equipment for crushing treatment;
(2) pulping: screening raw materials, injecting a raw material solution, steaming and boiling at high temperature, washing bamboo pulp, screening the bamboo pulp and manufacturing the bamboo pulp;
(3) concentration: concentrating the bamboo pulp by using a vacuum concentrator;
(4) and (3) degradation: pouring the bamboo pulp into a degradation cabin, adjusting the temperature and air pressure change in the degradation cabin, and uniformly stirring the bamboo pulp for 30 minutes;
(5) proportioning: injecting reaction stock solution into the degradation cabin to accelerate the degradation rate of the bamboo pulp;
(6) and (3) net surfing molding: the concentration of the upper net can be adjusted to 0.12-0.32%, the pH value is 6.3-7.1, and the dryness after forming is 24-28%;
(7) squeezing: the molded raw materials need to be subjected to compression roller operation, and the degree of compression is ensured to be 50-53%;
(8) and (3) drying: placing the paper in a drying device to facilitate the drying rate;
(9) packaging: the paper is accomodate and is deposited, carries out the transportation simultaneously and stands up.
According to the scheme, in the pulp screening step, a pressure screen is used for screening the bamboo pulp, impurities in the bamboo pulp are separated and used for purifying the bamboo pulp and ensuring the later-stage quality of paper, moso bamboo, green bamboo or sympodial bamboo is selected as a raw material in the material selecting step, the paper is squeezed for three times in the squeezing step, and the squeezing values for the three times are respectively 50kn/m, 80kn/m and 120 kn/m.
The working principle is as follows: crushing: selecting raw materials, and delivering the raw materials to crushing equipment for crushing treatment; pulping: screening raw materials, injecting a raw material solution, steaming and boiling at high temperature, washing bamboo pulp, screening the bamboo pulp and manufacturing the bamboo pulp; concentration: concentrating the bamboo pulp by using a vacuum concentrator; and (3) degradation: pouring the bamboo pulp into a degradation cabin, adjusting the temperature and air pressure change in the degradation cabin, and uniformly stirring the bamboo pulp for 30 minutes; proportioning: injecting reaction stock solution into the degradation cabin to accelerate the degradation rate of the bamboo pulp; and (3) net surfing molding: the concentration of the upper net can be adjusted to 0.12-0.32%, the pH value is 6.3-7.1, and the dryness after forming is 24-28%; squeezing: the molded raw materials need to be subjected to compression roller operation, and the degree of compression is ensured to be 50-53%; and (3) drying: placing the paper in a drying device to facilitate the drying rate; packaging: paper is stored and is deposited, transports simultaneously and stands up
In summary, the following steps: the invention improves the traditional pulping process, changes the raw material from wood pulp into bamboo pulp, widens the source of the paper pulp raw material and solves the situation of the shortage of wood pulp supply. Meanwhile, the characteristics of the chlamydomonas moth bamboo pulp and the improvement of the pulping process are changed, the air permeability of the produced film material is greatly improved, and the film material has good heat sealability, light resistance, heat resistance and unique aroma retention of the bamboo. The manufactured paper has smooth and beautiful appearance and overflows fragrance. Accords with the national concept of green ecological economic development and is beneficial to the coordinated development of ecological environmental protection and market economy.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A method for preparing degradable membrane material from thick black liquor of bamboo pulp includes such steps as breaking, pulping, concentrating, degrading, proportioning, shaping by passing through net, squeezing, drying and packing, and features that the bamboo fibre pulp is used as raw material, and after 20-30% pulping, the bamboo fibre pulp is passed through net to obtain the membrane material with adjustable net concentration of 0.12-0.32% and pH value of 6.3-7.1, and the raw material is pressed by roller to obtain 50-53% of squeezing degree.
2. The method for manufacturing the degradable membrane material by using the bamboo pulp thick black liquor as claimed in claim 1, which is characterized by comprising the following steps:
(1) crushing: selecting raw materials, and delivering the raw materials to crushing equipment for crushing treatment;
(2) pulping: screening raw materials, injecting a raw material solution, steaming and boiling at high temperature, washing bamboo pulp, screening the bamboo pulp and manufacturing the bamboo pulp;
(3) concentration: concentrating the bamboo pulp by using a vacuum concentrator;
(4) and (3) degradation: pouring the bamboo pulp into a degradation cabin, adjusting the temperature and air pressure change in the degradation cabin, and uniformly stirring the bamboo pulp for 30 minutes;
(5) proportioning: injecting reaction stock solution into the degradation cabin to accelerate the degradation rate of the bamboo pulp;
(6) and (3) net surfing molding: the concentration of the upper net can be adjusted to 0.12-0.32%, the pH value is 6.3-7.1, and the dryness after forming is 24-28%;
(7) squeezing: the molded raw materials need to be subjected to compression roller operation, and the degree of compression is ensured to be 50-53%;
(8) and (3) drying: placing the paper in a drying device to facilitate the drying rate;
(9) packaging: the paper is accomodate and is deposited, carries out the transportation simultaneously and stands up.
3. The method for manufacturing the degradable membrane material by using the thick black liquor of the bamboo pulp as claimed in claim 1, wherein the step of screening the bamboo pulp is to use a pressure screen to screen the bamboo pulp, and to separate impurities in the bamboo pulp for purifying the bamboo pulp and ensuring the later quality of paper.
4. The method for manufacturing the degradable membrane material by using the thick black liquor of bamboo pulp according to claim 1, wherein the material selection step selects moso bamboos, green bamboos or sympodial bamboos as raw materials.
5. The method for manufacturing the degradable membrane material by using the bamboo pulp thick black liquor as claimed in claim 1, wherein the paper is subjected to three times of pressing operation in the pressing step, and the three times of pressing operation are respectively 50kn/m, 80kn/m and 120 kn/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111035930.7A CN113832762A (en) | 2021-09-06 | 2021-09-06 | Method for manufacturing degradable membrane material by bamboo pulp thick black liquor |
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| CN202111035930.7A CN113832762A (en) | 2021-09-06 | 2021-09-06 | Method for manufacturing degradable membrane material by bamboo pulp thick black liquor |
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| CN202111035930.7A Pending CN113832762A (en) | 2021-09-06 | 2021-09-06 | Method for manufacturing degradable membrane material by bamboo pulp thick black liquor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343743A (en) * | 2000-09-21 | 2002-04-10 | 徐华 | Degradable plant fibre film for agriculture purpose |
| CN108277673A (en) * | 2018-01-30 | 2018-07-13 | 江西鼎宏生物科技有限公司 | The method of straw microbial degradation slurrying |
| CN112442922A (en) * | 2020-11-04 | 2021-03-05 | 江西中竹生物质科技有限公司 | Method for producing degradable mulching film paper by using bamboo pulp |
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2021
- 2021-09-06 CN CN202111035930.7A patent/CN113832762A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343743A (en) * | 2000-09-21 | 2002-04-10 | 徐华 | Degradable plant fibre film for agriculture purpose |
| CN108277673A (en) * | 2018-01-30 | 2018-07-13 | 江西鼎宏生物科技有限公司 | The method of straw microbial degradation slurrying |
| CN112442922A (en) * | 2020-11-04 | 2021-03-05 | 江西中竹生物质科技有限公司 | Method for producing degradable mulching film paper by using bamboo pulp |
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Application publication date: 20211224 |