CN112211016A - Processing technology of natural color toilet paper - Google Patents
Processing technology of natural color toilet paper Download PDFInfo
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- CN112211016A CN112211016A CN202011105197.7A CN202011105197A CN112211016A CN 112211016 A CN112211016 A CN 112211016A CN 202011105197 A CN202011105197 A CN 202011105197A CN 112211016 A CN112211016 A CN 112211016A
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- 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
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
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- 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
- 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
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- 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
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Sanitary Thin Papers (AREA)
Abstract
The invention discloses a processing technology of natural-color toilet paper, which comprises the following steps: s1, preparing needle leaf pulp; s2, preparing broad-leaved pulp; s3, preparing bamboo pulp; s4, mixing the pulp; s5, grinding into thick liquid; s6, blending; and S7, manufacturing paper. The bamboo pulp has high tearing strength and bulk, and can be mixed with wood pulp for use, so that the tearing strength of the toilet paper can be improved, the problem that the existing paper is easy to break is solved, the bamboo material and wood are separately cooked, the utilization rate of raw materials is improved, the bamboo pulp is added into the wood pulp, the cost of the paper is reduced, different cooking liquids are adopted when the bamboo material is cooked, the removal rate of lignin is improved, a wet strength agent and a papermaking dispersing agent are added, the bulk and the wet strength of the toilet paper are improved, the prepared toilet paper has good softness and good water absorption, and the color of the paper can be uniform.
Description
Technical Field
The invention belongs to the technical field of toilet paper production, and particularly relates to a processing technology of natural-color toilet paper.
Background
The existing raw wood pulp toilet paper generally adopts bleached white wood pulp as a raw material, and the bleached white wood pulp is bleached by chlorine or non-chlorine medicines, so that not only are bleaching chemicals consumed, but also the environment is influenced by waste water in the production process. Along with the enhancement of environmental protection and health consciousness of people, the natural color toilet paper is produced for meeting the requirements, and is generally made of pure wood pulp at present, so that the manufacturing cost is higher, the paper is not beneficial to long-term use of people, the tearing strength and the bulk of the paper are low, and the trouble of using the toilet paper tape is brought to people.
Disclosure of Invention
The invention aims to provide a processing technology of natural color toilet paper, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the processing technology of the natural color toilet paper has the structural key points that: the method comprises the following steps:
s1, needle blade pulp preparation: selecting 8-12 years old needle leaf wood, peeling, cutting into needle leaf slices, crushing the needle leaf slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain needle leaf pulp;
s2, preparing broad-leaved pulp: selecting 7-10 years of broad-leaved wood, peeling, cutting into broad-leaved slices, crushing the broad-leaved slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain broad-leaved pulp;
s3, preparing bamboo pulp: selecting 2-5 years bamboo, cutting into bamboo chips, putting the bamboo chips into cooking equipment, wherein the mass ratio of cooking liquor added into the cooking equipment to oven-dried bamboo chips is 2: 5, crushing, stirring and filtering the bamboo chips to obtain bamboo pulp;
s4, mixing pulp: weighing the needle leaf pulp in the step S1, the broad leaf pulp in the step S2 and the bamboo pulp in the step S3, adding a certain amount of water to stir and filter the mixed pulp, removing impurities in the mixed pulp, then adding the mixed pulp into a pulper, pulping the pulped pulp, and simultaneously adding a certain amount of reactant;
s5, grinding: grinding the pulp crushed in the step S4 into pulp, and washing the pulp after grinding;
s6, batching: adding 0.8-1.1% of wet strength agent and 0.1-0.2% of dispersing agent into the slurry washed in the step S5, and stirring;
s7, papermaking: and (5) spraying the slurry obtained in the step (S6) on a forming mesh to form a paper web, and then sequentially dewatering, drying, stripping, collecting, slitting, rolling and packaging the paper web to obtain a finished product.
Preferably, the needle blade slice in step S1 has a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
Preferably, the broadleaf slices in step S2 have a length of 5-10mm, a thickness of 3-5mm and a width of 6-10 mm.
Preferably, the bamboo chips in step S3 have a length of 5-10mm, a thickness of 3-5mm and a width of 6-10 mm.
Preferably, the cooking liquor in step S3 is composed of sodium hydroxide, sodium sulfite, sodium borohydride, alkylpolyglucoside, and water.
Preferably, in step S4, the mass ratio of the needle blade pulp to the broad blade pulp to the bamboo pulp is 1: 1-2: 2-4.
Preferably, the reactant in the step S4 is composed of potassium hydroxide, pulping enzyme and an enhancer, and the mass ratio of the potassium hydroxide, the pulping enzyme and the enhancer is 4: 5: 1.
preferably, the wet strength agent in step S6 is one or more of modified chitosan, melamine-formaldehyde resin, urea formaldehyde resin and polyacrylamide-glyoxal resin.
Preferably, the dispersing agent in step S6 is one or more of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate and sodium polyacrylate.
Compared with the prior art, the bamboo pulp has high tearing strength and bulk, and can be mixed with wood pulp for use, so that the tearing strength of the toilet paper can be improved, the problem that the existing paper is easy to break is solved, the bamboo material and wood are separately cooked, the utilization rate of raw materials is improved, the bamboo pulp is added into the wood pulp, the cost of the paper is reduced, different cooking liquids are adopted when the bamboo material is cooked, the lignin removal rate of the bamboo material is improved, a wet strength agent and a papermaking dispersing agent are added, the bulk and the wet strength of the toilet paper are improved, the prepared toilet paper has good softness and good water absorption, and meanwhile, the color of the paper can be uniform.
Drawings
FIG. 1 is a flow chart of the production process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides a technical solution, a process for processing natural color toilet paper, comprising the following steps:
s1, needle blade pulp preparation: selecting 8-12 years old needle leaf wood, peeling, cutting into needle leaf slices, crushing the needle leaf slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain needle leaf pulp;
s2, preparing broad-leaved pulp: selecting 7-10 years of broad-leaved wood, peeling, cutting into broad-leaved slices, crushing the broad-leaved slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain broad-leaved pulp;
s3, preparing bamboo pulp: selecting 2-5 years bamboo, cutting into bamboo chips, putting the bamboo chips into cooking equipment, wherein the mass ratio of cooking liquor added into the cooking equipment to oven-dried bamboo chips is 2: 5, crushing, stirring and filtering the bamboo chips to obtain bamboo pulp;
s4, mixing pulp: weighing the needle leaf pulp in the step S1, the broad leaf pulp in the step S2 and the bamboo pulp in the step S3, adding a certain amount of water to stir and filter the mixed pulp, removing impurities in the mixed pulp, then adding the mixed pulp into a pulper, pulping the pulped pulp, and simultaneously adding a certain amount of reactant;
s5, grinding: grinding the pulp crushed in the step S4 into pulp, and washing the pulp after grinding;
s6, batching: adding 0.8% of wet strength agent and 0.1% of dispersing agent into the slurry washed in the step S5, and stirring;
s7, papermaking: and (5) spraying the slurry obtained in the step (S6) on a forming mesh to form a paper web, and then sequentially dewatering, drying, stripping, collecting, slitting, rolling and packaging the paper web to obtain a finished product.
In this embodiment, the length of the conifer section in step S1 is 5-10mm, the thickness is 3-5mm, and the width is 6-10 mm.
In this embodiment, the broadleaf slices in step S2 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the bamboo strips in step S3 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the cooking solution in step S3 is composed of sodium hydroxide, sodium sulfite, sodium borohydride, alkyl polyglucoside and water.
In this embodiment, in step S4, the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 1: 2.
in this embodiment, the reactant in step S4 is composed of potassium hydroxide, a pulping enzyme, and an enhancer, and the mass ratio of the potassium hydroxide, the pulping enzyme, and the enhancer is 4: 5: 1.
in this embodiment, the wet strength agent in step S6 is one or more of modified chitosan, melamine-formaldehyde resin, urea-formaldehyde resin, and polyacrylamide-glyoxal resin.
In this embodiment, the dispersant in step S6 is one or a combination of more of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate, and sodium polyacrylate.
Example 2
Referring to fig. 1, the present invention provides a technical solution, a process for processing natural color toilet paper, comprising the following steps:
s1, needle blade pulp preparation: selecting 8-12 years old needle leaf wood, peeling, cutting into needle leaf slices, crushing the needle leaf slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain needle leaf pulp;
s2, preparing broad-leaved pulp: selecting 7-10 years of broad-leaved wood, peeling, cutting into broad-leaved slices, crushing the broad-leaved slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain broad-leaved pulp;
s3, preparing bamboo pulp: selecting 2-5 years bamboo, cutting into bamboo chips, putting the bamboo chips into cooking equipment, wherein the mass ratio of cooking liquor added into the cooking equipment to oven-dried bamboo chips is 2: 5, crushing, stirring and filtering the bamboo chips to obtain bamboo pulp;
s4, mixing pulp: weighing the needle leaf pulp in the step S1, the broad leaf pulp in the step S2 and the bamboo pulp in the step S3, adding a certain amount of water to stir and filter the mixed pulp, removing impurities in the mixed pulp, then adding the mixed pulp into a pulper, pulping the pulped pulp, and simultaneously adding a certain amount of reactant;
s5, grinding: grinding the pulp crushed in the step S4 into pulp, and washing the pulp after grinding;
s6, batching: adding 1.0% of wet strength agent and 0.2% of dispersing agent into the slurry washed in the step S5, and stirring;
s7, papermaking: and (5) spraying the slurry obtained in the step (S6) on a forming mesh to form a paper web, and then sequentially dewatering, drying, stripping, collecting, slitting, rolling and packaging the paper web to obtain a finished product.
In this embodiment, the length of the conifer section in step S1 is 5-10mm, the thickness is 3-5mm, and the width is 6-10 mm.
In this embodiment, the broadleaf slices in step S2 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the bamboo strips in step S3 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the cooking solution in step S3 is composed of sodium hydroxide, sodium sulfite, sodium borohydride, alkyl polyglucoside and water.
In this embodiment, in step S4, the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 2: 3.
in this embodiment, the reactant in step S4 is composed of potassium hydroxide, a pulping enzyme, and an enhancer, and the mass ratio of the potassium hydroxide, the pulping enzyme, and the enhancer is 4: 5: 1.
in this embodiment, the wet strength agent in step S6 is one or more of modified chitosan, melamine-formaldehyde resin, urea-formaldehyde resin, and polyacrylamide-glyoxal resin.
In this embodiment, the dispersant in step S6 is one or a combination of more of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate, and sodium polyacrylate.
Example 3
Referring to fig. 1, the present invention provides a technical solution, a process for processing natural color toilet paper, comprising the following steps:
s1, needle blade pulp preparation: selecting 8-12 years old needle leaf wood, peeling, cutting into needle leaf slices, crushing the needle leaf slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain needle leaf pulp;
s2, preparing broad-leaved pulp: selecting 7-10 years of broad-leaved wood, peeling, cutting into broad-leaved slices, crushing the broad-leaved slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain broad-leaved pulp;
s3, preparing bamboo pulp: selecting 2-5 years bamboo, cutting into bamboo chips, putting the bamboo chips into cooking equipment, wherein the mass ratio of cooking liquor added into the cooking equipment to oven-dried bamboo chips is 2: 5, crushing, stirring and filtering the bamboo chips to obtain bamboo pulp;
s4, mixing pulp: weighing the needle leaf pulp in the step S1, the broad leaf pulp in the step S2 and the bamboo pulp in the step S3, adding a certain amount of water to stir and filter the mixed pulp, removing impurities in the mixed pulp, then adding the mixed pulp into a pulper, pulping the pulped pulp, and simultaneously adding a certain amount of reactant;
s5, grinding: grinding the pulp crushed in the step S4 into pulp, and washing the pulp after grinding;
s6, batching: adding 1.1% of wet strength agent and 0.2% of dispersing agent into the slurry washed in the step S5, and stirring;
s7, papermaking: and (5) spraying the slurry obtained in the step (S6) on a forming mesh to form a paper web, and then sequentially dewatering, drying, stripping, collecting, slitting, rolling and packaging the paper web to obtain a finished product.
In this embodiment, the length of the conifer section in step S1 is 5-10mm, the thickness is 3-5mm, and the width is 6-10 mm.
In this embodiment, the broadleaf slices in step S2 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the bamboo strips in step S3 have a length of 5-10mm, a thickness of 3-5mm, and a width of 6-10 mm.
In this embodiment, the cooking solution in step S3 is composed of sodium hydroxide, sodium sulfite, sodium borohydride, alkyl polyglucoside and water.
In this embodiment, in step S4, the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 2: 4.
in this embodiment, the reactant in step S4 is composed of potassium hydroxide, a pulping enzyme, and an enhancer, and the mass ratio of the potassium hydroxide, the pulping enzyme, and the enhancer is 4: 5: 1.
in this embodiment, the wet strength agent in step S6 is one or more of modified chitosan, melamine-formaldehyde resin, urea-formaldehyde resin, and polyacrylamide-glyoxal resin.
In this embodiment, the dispersant in step S6 is one or a combination of more of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate, and sodium polyacrylate.
According to the quality detection index comparison after the papermaking of different pulp proportions (example 1: the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 1: 2; example 2: the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 2: 3; and example 3: the mass ratio of the needle blade pulp, the broad blade pulp and the bamboo pulp is 1: 2: 4).
The bamboo pulp has high tearing strength and bulk, and can be mixed with wood pulp for use, so that the tearing strength of the toilet paper can be improved, the problem that the existing paper is easy to break is solved, the bamboo material and wood are separately cooked, the utilization rate of raw materials is improved, the bamboo pulp is added into the wood pulp, the cost of the paper is reduced, different cooking liquids are adopted when the bamboo material is cooked, the removal rate of lignin is improved, a wet strength agent and a papermaking dispersing agent are added, the bulk and the wet strength of the toilet paper are improved, the prepared toilet paper has good softness and good water absorption, and the color of the paper can be uniform.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A processing technology of natural color toilet paper is characterized in that: the method comprises the following steps:
s1, needle blade pulp preparation: selecting 8-12 years old needle leaf wood, peeling, cutting into needle leaf slices, crushing the needle leaf slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain needle leaf pulp;
s2, preparing broad-leaved pulp: selecting 7-10 years of broad-leaved wood, peeling, cutting into broad-leaved slices, crushing the broad-leaved slices, and performing cooking treatment, stirring, screening and filtering on the crushed raw materials to obtain broad-leaved pulp;
s3, preparing bamboo pulp: selecting 2-5 years bamboo, cutting into bamboo chips, putting the bamboo chips into cooking equipment, wherein the mass ratio of cooking liquor added into the cooking equipment to oven-dried bamboo chips is 2: 5, crushing, stirring and filtering the bamboo chips to obtain bamboo pulp;
s4, mixing pulp: weighing the needle leaf pulp in the step S1, the broad leaf pulp in the step S2 and the bamboo pulp in the step S3, adding a certain amount of water to stir and filter the mixed pulp, removing impurities in the mixed pulp, then adding the mixed pulp into a pulper, pulping the pulped pulp, and simultaneously adding a certain amount of reactant;
s5, grinding: grinding the pulp crushed in the step S4 into pulp, and washing the pulp after grinding;
s6, batching: adding 0.8-1.1% of wet strength agent and 0.1-0.2% of dispersing agent into the slurry washed in the step S5, and stirring;
s7, papermaking: and (5) spraying the slurry obtained in the step (S6) on a forming mesh to form a paper web, and then sequentially dewatering, drying, stripping, collecting, slitting, rolling and packaging the paper web to obtain a finished product.
2. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the length of the needle leaf slice in the step S1 is 5-10mm, the thickness is 3-5mm, and the width is 6-10 mm.
3. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the length of the broadleaf slices in the step S2 is 5-10mm, the thickness is 3-5mm, and the width is 6-10 mm.
4. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the bamboo chips in the step S3 have the length of 5-10mm, the thickness of 3-5mm and the width of 6-10 mm.
5. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the cooking solution in step S3 is composed of sodium hydroxide, sodium sulfite, sodium borohydride, alkyl polyglucoside and water.
6. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: in the step S4, the mass ratio of the needle blade pulp to the broad blade pulp to the bamboo pulp is 1: 1-2: 2-4.
7. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the reactant in the step S4 is composed of potassium hydroxide, pulping enzyme and reinforcing agent, and the mass ratio of the potassium hydroxide to the pulping enzyme to the reinforcing agent is 4: 5: 1.
8. the processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the wet strength agent in the step S6 is one or a combination of modified chitosan, melamine-formaldehyde resin, urea formaldehyde resin and polyacrylamide-glyoxal resin.
9. The processing technology of the natural-color toilet paper as claimed in claim 1, characterized in that: the dispersing agent in the step S6 is one or a combination of a plurality of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate and sodium polyacrylate.
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| CN202011105197.7A CN112211016A (en) | 2020-10-15 | 2020-10-15 | Processing technology of natural color toilet paper |
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| CN202011105197.7A CN112211016A (en) | 2020-10-15 | 2020-10-15 | Processing technology of natural color toilet paper |
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Cited By (1)
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|---|---|---|---|---|
| CN113338075A (en) * | 2021-05-17 | 2021-09-03 | 广东比伦生活用纸有限公司 | Antibacterial soft toilet paper and preparation method thereof |
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