CN113136742A - High-permeability dialysis paper and preparation method thereof - Google Patents

High-permeability dialysis paper and preparation method thereof Download PDF

Info

Publication number
CN113136742A
CN113136742A CN202110281227.8A CN202110281227A CN113136742A CN 113136742 A CN113136742 A CN 113136742A CN 202110281227 A CN202110281227 A CN 202110281227A CN 113136742 A CN113136742 A CN 113136742A
Authority
CN
China
Prior art keywords
paper
base paper
pulp
permeability
dialysis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110281227.8A
Other languages
Chinese (zh)
Other versions
CN113136742B (en
Inventor
姚华
马龙虎
陆佩静
郭晓峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Winbon Special Paper Co ltd
Huabang Gulou New Material Co ltd
Original Assignee
Zhejiang Winbon Special Paper Co ltd
Huabang Gulou New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Winbon Special Paper Co ltd, Huabang Gulou New Material Co ltd filed Critical Zhejiang Winbon Special Paper Co ltd
Priority to CN202110281227.8A priority Critical patent/CN113136742B/en
Publication of CN113136742A publication Critical patent/CN113136742A/en
Application granted granted Critical
Publication of CN113136742B publication Critical patent/CN113136742B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/08—Synthetic cellulose fibres from regenerated cellulose
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/005—Microorganisms or enzymes
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/09—Sulfur-containing compounds
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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
    • D21H21/16—Sizing or water-repelling agents
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Abstract

The invention discloses high-permeability dialysis paper and a preparation method thereof, belonging to the technical field of medical dialysis paper, and comprising base paper containing modified viscose fibers, wherein the content of the modified viscose fibers in the base paper is 15-25wt%, and the modified viscose fibers are acrylamide grafted viscose fibers; the preparation method of the high-permeability dialyzing paper comprises the steps of mixing the pulped wood pulp with modified viscose fibers after enzymolysis treatment by using an enzymolysis agent to obtain paper pulp; and mixing the paper pulp with a wet strength agent, an additive and AKD to prepare the high-permeability dialyzing paper. The base paper obtained by the invention has good bursting property and the bursting index is 6.0 kPa.m2More than g; the base paper has good air permeability, and the air permeability is 5.0 mu m (Pa.s)‑1The above; the high permeability dialysis paper has good permeability, and the permeability is 4.3 μm (Pa.s)‑1The above; the air permeability retention rate of the high-air permeability dialysis paper is 85% or more.

Description

High-permeability dialysis paper and preparation method thereof
Technical Field
The invention belongs to the technical field of medical dialyzing paper, and particularly relates to high-air-permeability dialyzing paper and a preparation method thereof.
Background
The medical dialysis base paper is a base paper of dialysis paper used in medical industry, the dialysis paper is mainly used for sterilization of medical surgical instruments, one surface of the dialysis paper is high-density polyethylene, and the other surface of the dialysis paper is dialysis paper. In the application process, the dialyzing paper is usually coated and printed to form a bag, namely, the dialyzing paper is used as the base paper of the paper-plastic bag.
With the rapid development of the medical industry, the production cost of medical instruments repeatedly operated and used by a disinfection supply center is increased dramatically due to the continuous increase of the cotton cloth materials and the cleaning cost. In addition, the storage quality of the sterile product is influenced by multiple factors, the use and management difficulty of the all-cotton cloth is increased, and a plurality of medical institutions use paper plastic bags, all-cotton cloth and non-woven cloth in the sterilization package of medical articles. Compared with a full-plastic packaging bag, the paper bag made of the medical dialyzing paper has two advantages: firstly, the environment is protected; secondly, safety and sanitation. The paper-plastic packaging bag can realize sterilization after the packaging of the instruments, reduces intermediate links in direct contact with the instruments, and can not be realized by full-plastic packaging, so that the paper-plastic packaging is safer for patients, and medical personnel can not be infringed by disinfectant possibly remaining in the bag after the instruments are unpacked.
In recent years, with the continuous development and progress of the medical industry and the increasing importance of people on health, the quality requirement of the market on the dialyzing paper is higher, and the requirements of various aspects such as physical indexes, performance and the like of the dialyzing paper are higher than those of medical packaging base paper of 4- (2-aminoethyl) benzenesulfonamide, such as strength, pore diameter, air permeability, elasticity and the like; meanwhile, the requirements on air permeability, stripping effect and the like are higher.
Disclosure of Invention
The invention aims to provide a base paper which has large equivalent pore diameter and good bursting resistance and can be used for dialyzing paper.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a base paper comprising: the base paper contains modified viscose fiber, and the content of the modified viscose fiber in the base paper is 15-25 wt%.
Preferably, the modified viscose is an acrylamide grafted viscose. The modified viscose fiber forms a loose structure in the prepared base paper due to the smooth fiber surface and the grafted fiber structure, so that the air permeability of the base paper is improved.
Preferably, the modified viscose is distributed in the base paper.
Preferably, the raw paper contains an inactivating zymolytic agent.
More preferably, the inactivated enzymatic agent comprises at least one of inactivated cellulase, beta-glucosidase, and glucoamylase.
Preferably, the base paper contains a wet strength agent.
More preferably, the wet strength agent comprises at least one of PAE, WSA.
Preferably, the base paper contains additives.
More preferably, the additive comprises at least one of starch, glycidyl versatate.
Preferably, the raw paper contains AKD.
The invention discloses application of the base paper in preparation of dialyzing paper.
The invention aims to provide a preparation method of dialysis paper with good air permeability and high retention rate of air permeability after sizing.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a preparation method of high-permeability dialysis paper comprises the following steps:
and (3) coating the surface sizing agent on the base paper, and drying to obtain the high-permeability dialyzing paper.
Preferably, the preparation method of the high-permeability dialysis paper comprises base paper preparation.
Preferably, the surface sizing agent comprises starch, polyvinyl alcohol and an adjuvant.
More preferably, the base paper preparation comprises pulping treatment, modified viscose fiber preparation, paper pulp preparation and base paper preparation.
Preferably, in the pulping treatment, the hardwood pulp is soaked for 2-5h to obtain hardwood pulp, the hardwood pulp is defibered for 15-60min, and the hardwood pulp is obtained after pulping to 20-30 DEG SR.
More preferably, the hardwood pulp has a hardwood pulp board content of 5-15 wt%.
Preferably, in the pulping treatment, the softwood pulp is soaked for 2-5h to obtain softwood pulp, the softwood pulp is defibered for 15-60min, and the softwood pulp is obtained after pulping to 20-30 DEG SR.
More preferably, the softwood pulp has a softwood pulp content of 5 to 15 wt%.
More preferably, hardwood pulp and softwood pulp obtained after pulping treatment are mixed, fluffed for 15-60min to obtain a wood pulp mixed solution, and the wood pulp mixed solution is stirred for 5-30min and then uniformly mixed to obtain mixed wood pulp.
Still further preferably, hardwood pulp and softwood pulp are mixed in a mass ratio of 1: mixing at a ratio of 0.1-1.
Preferably, in the preparation of the modified viscose fiber, the viscose fiber is immersed in a potassium permanganate solution, the reaction is carried out for 5-30min in a water bath at 30-70 ℃, the solution is taken out and washed to be colorless, the dried pretreated viscose fiber is added into an acrylamide monomer solution with the pH value of 5-6, the reaction is carried out for 1-4h in the water bath at 30-70 ℃, impurities are removed from washing liquor, and the modified viscose fiber is obtained after centrifugal dehydration and drying.
More preferably, the potassium permanganate solution contains 0.001 to 0.01wt% potassium permanganate.
More preferably, the acrylamide monomer solution contains 4 to 12wt% of acrylamide monomer.
More preferably, the pre-treated viscose is used in an amount of 5-30wt% of the acrylamide monomer solution and the washing solution is 10-50wt% of an ethanol solution.
Preferably, in the preparation of the paper pulp, the pH value of the mixed wood pulp is adjusted to 5-7, an enzymolysis agent is added, the mixed wood pulp is subjected to oscillation enzymolysis for 0.5-5h at the water bath temperature of 40-60 ℃, and the modified viscose fiber is added into the mixed wood pulp after the enzymolysis after the enzyme deactivation to obtain the paper pulp. And (3) carrying out enzymolysis treatment to remove micro fibers or surface hydroxyl groups on the pulp fibers, thereby improving the performance of the prepared base paper.
More preferably, the enzymolysis agent is at least one of cellulase, beta-glucosidase and glucoamylase.
More preferably, the amount of the enzymolysis agent is 0.01-0.2 wt%.
More preferably, the modified viscose is added in an amount of 3-9wt% of the mixed wood pulp.
More preferably, the enzymatic agent is a mixture of two enzymes, wherein the two enzymes are present in a ratio of 1: mixing at a mass ratio of 0.1-10.
More preferably, the enzymatic hydrolysate is a mixture of three enzymes, wherein the three enzymes in the enzymatic hydrolysate are mixed in a ratio of 1: 0.1-10: mixing at a mass ratio of 0.1-10.
Preferably, in the preparation of the base paper, the wet strength agent is added into the paper pulp, the mixture is stirred and mixed uniformly, then the additive is added, the mixture is stirred and mixed uniformly, the AKD is added for defibering, the wet base paper is obtained through sheet forming, and the base paper is obtained through pressing and drying.
More preferably, the wet strength agent is PAE and the wet strength agent is added in an amount of 0.1-2wt% of the pulp.
More preferably, the additive is starch, which is added in an amount of 0.2-0.8wt% of the pulp.
More preferably, the additives are starch and glycidyl versatate, the addition amount of starch is 0.2-0.8wt% of the pulp, and the addition amount of glycidyl versatate is 0.1-0.9wt% of the pulp. The starch and the tertiary carbonic acid glycidyl ester are added into paper pulp when the base paper is prepared, are uniformly dispersed into the paper pulp through mixing, and are mutually adhered with wood pulp fibers and modified viscose fibers in the paper pulp in the preparation of the base paper, so that the air permeability of the base paper is improved.
More preferably, AKD is added in an amount of 1-5wt% of the pulp.
Preferably, in the preparation of the surface sizing agent, the starch and the polyvinyl alcohol are added into the solvent and uniformly mixed at the temperature of 80-90 ℃, then the auxiliary agent is added, and the surface sizing agent is obtained by uniformly mixing.
More preferably, the solvent is an aqueous solution containing 1-6wt% polysorbate-80.
More preferably, the starch is added in an amount of 3-9wt% of the solvent.
More preferably, the polyvinyl alcohol is added in an amount of 10-30wt% of the starch.
More preferably, the auxiliary agent is 4- (2-aminoethyl) benzenesulfonamide, and the addition amount of the 4- (2-aminoethyl) benzenesulfonamide is 0.5-2wt% of the solvent. The 4- (2-aminoethyl) benzene sulfonamide interacts with fibers in the base paper in the surface sizing agent to connect the base paper with the surface sizing layer, so that the surface sizing layer is loose and porous, and the problem that the air permeability of the base paper is greatly reduced due to sizing is solved.
More preferably, the auxiliary agent is 4- (2-aminoethyl) benzenesulfonamide and 3-aminopropylmethyldimethoxysilane, the amount of 4- (2-aminoethyl) benzenesulfonamide added is 0.5-2wt% of the solvent, and the amount of 3-aminopropylmethyldimethoxysilane added is 0.3-1.2wt% of distilled water. When the 4- (2-aminoethyl) benzenesulfonamide and the 3-aminopropyl methyl dimethoxysilane are used together, the 4- (2-aminoethyl) benzenesulfonamide and the 3-aminopropyl methyl dimethoxysilane are used together on the base paper and the sizing layer, so that the air permeability of the dialysis paper is further improved.
Preferably, in the surface sizing, the surface sizing agent is applied to the base paper and then dried to obtain the high-permeability dialyzing paper; the glue application amount is 1-5 wt%.
The invention discloses high-permeability dialysis paper prepared by the method.
The invention adopts the paper pulp containing the modified viscose fiber, the wet strength agent, the additive and the AKD to prepare the base paper, and further adopts the paper pulp containing the 4- (2-aminoethyl) benzene sulfonamide and the 3-aminopropyl methyl dimethoxy silane to carry out surface sizing to prepare the high-permeability dialyzing paper, thereby having the following beneficial effects: the maximum equivalent pore diameter of the base paper is more than 12.0 μm, the base paper has good bursting resistance, and the bursting index is 6.0 kPa.m2More than g; the base paper has good air permeability, and the air permeability is 5.0 mu m (Pa.s)-1The above; the high permeability dialysis paper has good permeability, and the permeability is 4.3 μm (Pa.s)-1The above; the air permeability retention rate of the high-air permeability dialysis paper is 85% or more. Therefore, the preparation method of the dialysis paper is good in air permeability and high in air permeability retention rate after sizing.
Drawings
FIG. 1 is a diagram of the maximum equivalent pore size of base paper;
FIG. 2 is a graph of the burst index of base paper;
FIG. 3 is a graph of air permeability before and after sizing of highly air permeable dialyzing paper;
fig. 4 is a graph showing the retention of air permeability of highly air permeable dialysis paper.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
a method for preparing high-permeability dialysis paper,
pulping treatment: soaking the hardwood pulp board for 3h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 3h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 21-degree SR to obtain the softwood pulp; mixing the hardwood pulp and softwood pulp obtained after pulping treatment, fluffing for 20min to obtain a wood pulp mixed solution, stirring for 10min, and uniformly mixing to obtain mixed wood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixing at a ratio of 0.3.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Modified viscose fiber: soaking the viscose fiber in a potassium permanganate solution, reacting in a water bath at 50 ℃ for 10min, taking out distilled water, washing until the solution is colorless, adding the dried pretreated viscose fiber into an acrylamide monomer solution with the pH value of 5.5, reacting in the water bath at 50 ℃ for 2h, removing impurities from the washing solution, centrifugally dewatering, and drying to obtain the modified viscose fiber. The potassium permanganate solution contains 0.006wt% of potassium permanganate, the acrylamide monomer solution contains 9wt% of acrylamide monomer, the usage amount of the pretreated viscose fiber is 20wt% of the acrylamide monomer solution, and the washing solution is 30wt% of ethanol solution.
Preparing paper pulp: adjusting the pH value of the mixed wood pulp to 6, adding an enzymolysis agent, carrying out oscillation enzymolysis for 2 hours at the water bath temperature of 50 ℃, and adding the modified viscose fiber into the mixed wood pulp after enzymolysis after enzyme deactivation to obtain the paper pulp. The enzymolysis agent is cellulase and glucoamylase, and the mass ratio of the cellulase to the glucoamylase is 1: 0.3, and the usage amount of the zymolytic agent is 0.06 wt%; the addition amount of the modified viscose fiber is 3wt% of the mixed wood pulp.
Preparing base paper: adding a wet strength agent into paper pulp, stirring and mixing uniformly, adding an additive, stirring and mixing uniformly, adding AKD for defibering, sheet-making and forming to obtain wet base paper, and squeezing and drying to obtain the base paper. The wet strength agent is PAE, and the addition amount of the wet strength agent is 1wt% of the paper pulp; the additive is starch, and the addition amount of the starch is 0.4wt% of the pulp; AKD was added in an amount of 2wt% based on the pulp.
Quantitative determination in papermaking of 60g/m2Pressing the wet base paper under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Surface sizing agent: adding starch and polyvinyl alcohol into a solvent, uniformly mixing at the temperature of 80 ℃, adding an auxiliary agent, and uniformly mixing to obtain the surface sizing agent. The solvent is an aqueous solution containing 3wt% of polysorbate-80, the addition amount of the starch is 6wt% of the solvent, the addition amount of the polyvinyl alcohol is 20wt% of the starch, the auxiliary agent is 4- (2-aminoethyl) benzenesulfonamide, and the addition amount of the 4- (2-aminoethyl) benzenesulfonamide is 1.2wt% of the solvent.
Surface sizing: and (3) coating the surface sizing agent on the base paper, and drying to obtain the high-permeability dialyzing paper. The sizing amount was 3 wt%.
Example 2:
a method for preparing high-permeability dialysis paper,
pulping treatment: soaking the hardwood pulp board for 3h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 3h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 21-degree SR to obtain the softwood pulp; mixing the hardwood pulp and softwood pulp obtained after pulping treatment, fluffing for 20min to obtain a wood pulp mixed solution, stirring for 10min, and uniformly mixing to obtain mixed wood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixing at a ratio of 0.3.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Modified viscose fiber: soaking the viscose fiber in a potassium permanganate solution, reacting in a water bath at 50 ℃ for 10min, taking out distilled water, washing until the solution is colorless, adding the dried pretreated viscose fiber into an acrylamide monomer solution with the pH value of 5.5, reacting in the water bath at 50 ℃ for 2h, removing impurities from the washing solution, centrifugally dewatering, and drying to obtain the modified viscose fiber. The potassium permanganate solution contains 0.006wt% of potassium permanganate, the acrylamide monomer solution contains 9wt% of acrylamide monomer, the usage amount of the pretreated viscose fiber is 20wt% of the acrylamide monomer solution, and the washing solution is 30wt% of ethanol solution.
Preparing paper pulp: adjusting the pH value of the mixed wood pulp to 6, adding an enzymolysis agent, carrying out oscillation enzymolysis for 2 hours at the water bath temperature of 50 ℃, and adding the modified viscose fiber into the mixed wood pulp after enzymolysis after enzyme deactivation to obtain the paper pulp. The enzymolysis agent is cellulase and glucoamylase, and the mass ratio of the cellulase to the glucoamylase is 1: 0.3, and the usage amount of the zymolytic agent is 0.06 wt%; the addition amount of the modified viscose fiber is 3wt% of the mixed wood pulp.
Preparing base paper: adding a wet strength agent into paper pulp, stirring and mixing uniformly, adding an additive, stirring and mixing uniformly, adding AKD for defibering, sheet-making and forming to obtain wet base paper, and squeezing and drying to obtain the base paper. The wet strength agent is PAE, and the addition amount of the wet strength agent is 1wt% of the paper pulp; the additive is starch and tertiary carbonic acid glycidyl ester, the addition amount of the starch is 0.4wt% of the paper pulp, and the addition amount of the tertiary carbonic acid glycidyl ester is 0.3wt% of the paper pulp; AKD was added in an amount of 2wt% based on the pulp.
Quantitative determination in papermaking of 60g/m2Pressing the wet base paper under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Surface sizing agent: adding starch and polyvinyl alcohol into a solvent, uniformly mixing at the temperature of 80 ℃, adding an auxiliary agent, and uniformly mixing to obtain the surface sizing agent. The solvent is an aqueous solution containing 3wt% of polysorbate-80, the addition amount of the starch is 6wt% of the solvent, the addition amount of the polyvinyl alcohol is 20wt% of the starch, the auxiliary agent is 4- (2-aminoethyl) benzenesulfonamide, and the addition amount of the 4- (2-aminoethyl) benzenesulfonamide is 1.2wt% of the solvent.
Surface sizing: and (3) coating the surface sizing agent on the base paper, and drying to obtain the high-permeability dialyzing paper. The sizing amount was 3 wt%.
Example 3:
this example is different from example 2 only in that the amount of glycidyl versatate added in the additive in the base paper preparation is 0.5wt% of the pulp.
Example 4:
this example is different from example 2 only in that the amount of glycidyl versatate added in the additive in the base paper preparation is 0.8wt% of the pulp.
Example 5:
a method for preparing high-permeability dialysis paper,
pulping treatment: soaking the hardwood pulp board for 3h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 3h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 21-degree SR to obtain the softwood pulp; mixing the hardwood pulp and softwood pulp obtained after pulping treatment, fluffing for 20min to obtain a wood pulp mixed solution, stirring for 10min, and uniformly mixing to obtain mixed wood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixing at a ratio of 0.3.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Modified viscose fiber: soaking the viscose fiber in a potassium permanganate solution, reacting in a water bath at 50 ℃ for 10min, taking out distilled water, washing until the solution is colorless, adding the dried pretreated viscose fiber into an acrylamide monomer solution with the pH value of 5.5, reacting in the water bath at 50 ℃ for 2h, removing impurities from the washing solution, centrifugally dewatering, and drying to obtain the modified viscose fiber. The potassium permanganate solution contains 0.006wt% of potassium permanganate, the acrylamide monomer solution contains 9wt% of acrylamide monomer, the usage amount of the pretreated viscose fiber is 20wt% of the acrylamide monomer solution, and the washing solution is 30wt% of ethanol solution.
Preparing paper pulp: adjusting the pH value of the mixed wood pulp to 6, adding an enzymolysis agent, carrying out oscillation enzymolysis for 2 hours at the water bath temperature of 50 ℃, and adding the modified viscose fiber into the mixed wood pulp after enzymolysis after enzyme deactivation to obtain the paper pulp. The enzymolysis agent is cellulase and glucoamylase, and the mass ratio of the cellulase to the glucoamylase is 1: 0.3, and the usage amount of the zymolytic agent is 0.06 wt%; the addition amount of the modified viscose fiber is 3wt% of the mixed wood pulp.
Preparing base paper: adding a wet strength agent into paper pulp, stirring and mixing uniformly, adding an additive, stirring and mixing uniformly, adding AKD for defibering, sheet-making and forming to obtain wet base paper, and squeezing and drying to obtain the base paper. The wet strength agent is PAE, and the addition amount of the wet strength agent is 1wt% of the paper pulp; the additive is starch and tertiary carbonic acid glycidyl ester, the addition amount of the starch is 0.4wt% of the paper pulp, and the addition amount of the tertiary carbonic acid glycidyl ester is 0.3wt% of the paper pulp; AKD was added in an amount of 2wt% based on the pulp.
Quantitative determination in papermaking of 60g/m2Pressing the wet base paper under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Surface sizing agent: adding starch and polyvinyl alcohol into a solvent, uniformly mixing at the temperature of 80 ℃, adding an auxiliary agent, and uniformly mixing to obtain the surface sizing agent. The solvent is an aqueous solution containing 3wt% of polysorbate-80, the adding amount of the starch is 6wt% of the solvent, the adding amount of the polyvinyl alcohol is 20wt% of the starch, the auxiliaries are 4- (2-aminoethyl) benzenesulfonamide and 3-aminopropylmethyldimethoxysilane, the adding amount of the 4- (2-aminoethyl) benzenesulfonamide is 1.2wt% of the solvent, and the adding amount of the 3-aminopropylmethyldimethoxysilane is 0.5wt% of the solvent.
Surface sizing: and (3) coating the surface sizing agent on the base paper, and drying to obtain the high-permeability dialyzing paper. The sizing amount was 3 wt%.
Example 6:
this example is different from example 5 only in that the amount of 3-aminopropylmethyldimethoxysilane added to the surface sizing agent is 0.9wt% based on the solvent.
Example 7:
compared with the embodiment 1, the difference of the embodiment is only that in the pulp preparation, the enzymolysis agent is beta-glucosidase and glucoamylase, and the mass ratio of the beta-glucosidase to the glucoamylase is 1: mixing at a ratio of 0.3.
Example 8:
compared with the embodiment 1, the difference of the embodiment is only that in the pulp preparation, the enzymolysis agent is cellulase, glucoamylase and beta-glucosidase, and the mass ratio of the cellulase, the glucoamylase and the beta-glucosidase is 1: 0.3: mixing at a ratio of 0.2.
Comparative example 1:
this comparative example is compared to example 4, only with the exception that no modified viscose fibres were added to the pulp preparation.
Comparative example 2:
this comparative example is compared to example 4, except that no wet strength agent and AKD were added to the base paper preparation.
Comparative example 3:
this comparative example is different from example 6 only in that the surface sizing agent was prepared without the 4- (2-aminoethyl) benzenesulfonamide in the adjuvant.
Comparative example 4:
this comparative example is different from example 6 only in that the surface sizing agent preparation does not contain 4- (2-aminoethyl) benzenesulfonamide and 3-aminopropylmethyldimethoxysilane as auxiliaries.
Test example 1:
1. maximum equivalent pore diameter
Test samples: the unsized base papers obtained in the respective examples and comparative examples were prepared.
The test method comprises the following steps: isopropanol was used as the wetting fluid and the test was performed using a 7220 filter paper pore size tester to record the pressure at which the first bubble appeared.
The maximum equivalent radius is calculated as:
D=4S/P；
wherein D is the maximum equivalent radius, mum; s is surface tension, N/m; p is the pressure difference, Pa, of the bubbles penetrating through the base paper.
The maximum equivalent radius test result of the unsized base paper is shown in figure 1, the maximum equivalent radius of the unsized base paper obtained in example 1 is 12.3 mu m, the maximum equivalent radius of the unsized base paper obtained in example 2 is 13.8 mu m, and compared with example 1, examples 2 to 4 show that the use of the glycidyl versatate improves the maximum equivalent radius of the unsized base paper, namely the pore diameter of the unsized base paper is improved; comparison of examples 2 to 4 shows that the maximum equivalent radius of the unsized base paper increases with increasing amount of glycidyl versatate used; the maximum equivalent radius of the unsized base paper obtained in example 4 is 14.5 μm, the maximum equivalent radius of the unsized base paper obtained in comparative example 1 is 10.8 μm, and the use of the modified viscose fibers is shown to improve the maximum equivalent radius of the unsized base paper in example 4 compared with comparative example 1; example 1 shows, in comparison with comparative example 1, that the maximum equivalent radius of the unsized base paper cannot be increased even with glycidyl versatate when no modified viscose fibres are added; the maximum equivalent radius of the unsized base paper obtained in comparative example 2 was 12.5 μm, and the use of wet strength agent and AKD increased the maximum equivalent radius of the unsized base paper compared to comparative example 2 in example 4, and the absence of wet strength agent and AKD when modified viscose fibres and glycidyl versatate were used in the production process compared to comparative example 2, indicating that the maximum equivalent radius of the unsized base paper could not be increased.
The maximum equivalent pore diameter of the base paper obtained by the invention is more than 12 mu m.
2. Burst index
Test samples: the unsized base papers obtained in the respective examples and comparative examples were prepared.
The test method comprises the following steps: GB/T454-2020.
The results of the burst index test of the unsized base paper are shown in FIG. 2, and the burst index of the unsized base paper obtained in example 1 was 6.4 kPa · m2Perg, the bursting index of the unsized base paper obtained in example 2 was 7.3 kPa · m2(g), examples 2-4 compare example 1, showing that the use of glycidyl versatate increases the burst index, i.e. the burst strength, of the unsized base paper; the comparison between examples 2 to 4 shows that the bursting index of the unsized base paper is increased with the increase of the use amount of the tertiary carboxylic acid glycidyl ester, namely, the bursting strength of the unsized base paper is improved; the bursting index of the unsized base paper obtained in example 4 was 8.3 kPa · m2In g, the bursting index of the unsized base paper obtained in comparative example 1 was 5.7 kPa m2Example 4 compared to comparative example 1, shows that the use of modified viscose increases the burst index, i.e. the burst strength, of the unsized base paper; example 1 shows, in comparison with comparative example 1, that the burst index, i.e. the burst strength, of unsized base paper cannot be increased without the addition of modified viscose fibers, even with glycidyl versatate; comparative example 2 the bursting index of the unsized base paper obtained was 6.6 kPa · m2Example 4 shows that the use of a wet strength agent and AKD increases the burst index, i.e. the burst strength, of the unsized base paper compared to comparative example 2, and example 1 shows that the use of a wet strength agent and AKD does not increase the burst index, i.e. the burst strength, of the unsized base paper when modified viscose fibres and glycidyl versatate are used in the production process compared to comparative example 2.
The base paper obtained by the invention has a burst index of 6 kPa m2More than g.
Test example 3:
1. air permeability test
Test samples: the unsized base papers obtained in the examples and comparative examples and the dialyzed papers obtained after sizing were prepared.
The test method comprises the following steps: GB/T458-2008.
The retention of air permeability before and after sizing was calculated as follows:
performance retention = dialysis paper air permeability/unsized base paper air permeability × 100%.
The results of the air permeability test are shown in FIG. 3, and the air permeability of the unsized base paper obtained in example 1 was 5.1. mu.m. (Pa. s)-1The air permeability of the unsized base paper obtained in example 2 was 5.7. mu.m. (Pa. s)-1Examples 2-4 compared to example 1, show that the use of glycidyl versatate increases the air permeability of the unsized base paper; comparison of examples 2-4 shows that as the amount of glycidyl versatate used increases, the air permeability of the unsized base paper increases; the air permeability of the unsized dialyzed paper obtained in examples 5 to 6 and comparative examples 3 to 4 was the same as that of the unsized dialyzed paper obtained in example 4; the air permeability of the unsized base paper obtained in example 4 was 6.8. mu.m. (Pa. s)-1Comparative example 1 the unsized base paper obtained had an air permeability of 4.6. mu.m. (Pa. s)-1Example 4 compared to comparative example 1, shows that the use of modified viscose increases the air permeability of the unsized base paper; example 1 shows, in comparison with comparative example 1, that the air permeability of the unsized base paper cannot be increased even with glycidyl versatate when no modified viscose fibers are added; comparative example 2 the unsized base paper obtained had an air permeability of 5.3. mu.m. (Pa. s)-1Example 4 shows that the use of wet strength agent and AKD increases the air permeability of the unsized base paper compared to comparative example 2, and example 1 shows that the air permeability of unsized base paper cannot be increased without the use of wet strength agent and AKD when modified viscose fibers and glycidyl versatate are used in the manufacturing process compared to comparative example 2. The air permeability of the sized dialyzing paper is reduced.
Base paper obtained by the inventionHas an air permeability of 5.0 μm (Pa. s)-1The above; the air permeability of the high-permeability dialyzing paper is 4.3 mu m (Pa.s)-1The above.
The air permeability retention rate of the dialysis paper is maintained, and as shown in fig. 4, the air permeability retention rate of the dialysis paper obtained in example 1 is 88.24%, the air permeability retention rate of the dialysis paper obtained in example 2 is 89.47%, and examples 2 to 4 show that the air permeability retention rate of the dialysis paper is improved by using glycidyl versatate compared with example 1; comparison between examples 2 to 4 shows that the air permeability retention rate of the dialyzing paper is increased along with the increase of the using amount of the tertiary carbonic acid glycidyl ester; the air permeability retention rate of the dialysis paper obtained in example 4 is 91.18%, the air permeability retention rate of the dialysis paper obtained in comparative example 1 is 89.13%, and compared with comparative example 1, the air permeability retention rate of the dialysis paper is improved by using the modified viscose fibers shown in example 4; example 1 shows that the retention of air permeability of the dialysis paper cannot be improved even with glycidyl versatate when no modified viscose fiber is added, compared to comparative example 1; the air permeability retention rate of the dialysis paper obtained in the comparative example 2 is 88.68%, compared with the comparative example 2, the air permeability retention rate of the dialysis paper is improved by using the wet strength agent and AKD (alkyl ketene dimer), compared with the comparative example 2, the air permeability retention rate of the dialysis paper is not improved by using the wet strength agent and AKD when the modified viscose fiber and the glycidyl versatate are adopted in the preparation process, as shown in the example 1, compared with the comparative example 2; the air permeability retention rate of the dialysis paper obtained in the embodiment 5 is 92.65%, the air permeability retention rate of the dialysis paper obtained in the embodiment 6 is 94.12%, and compared with the embodiment 4, the air permeability retention rate of the dialysis paper is further improved by using 3-aminopropylmethyldimethoxysilane in the embodiments 5-6; the air permeability retention rate of the dialysis paper obtained in the comparative example 3 is 86.76%, the air permeability retention rate of the dialysis paper obtained in the comparative example 4 is 86.76%, and the comparison between the example 6 and the comparative examples 3-4 shows that when 4- (2-aminoethyl) benzenesulfonamide is not used, the use of 3-aminopropylmethyldimethoxysilane has no influence on the air permeability retention rate of the dialysis paper, and simultaneously shows that when 4- (2-aminoethyl) benzenesulfonamide and 3-aminopropylmethyldimethoxysilane are used together, the better effect is achieved.
The air permeability retention rate of the high-air permeability dialysis paper obtained by the invention is more than 85%.
The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (10)

1. A base paper comprising: the base paper contains modified viscose fibers, wherein the content of the modified viscose fibers in the base paper is 15-25 wt%.
2. The base paper of claim 1, wherein: the modified viscose fiber is acrylamide grafted viscose fiber.
3. The base paper of claim 1, wherein: the modified viscose fiber is distributed in the base paper.
4. The base paper of claim 1, wherein: the base paper contains starch and glycidyl versatate.
5. The base paper of claim 1, wherein: the raw paper contains an inactivation enzymolysis agent.
6. Use of the base paper of any of claims 1 to 5 for the preparation of dialysis paper.
7. A preparation method of high-permeability dialysis paper comprises the following steps:
the surface sizing agent is applied to the base paper of claim 1 and then dried to obtain the highly air permeable dialyzing paper.
8. The method for preparing high permeability dialysis paper as claimed in claim 7, wherein: the preparation method of the high-permeability dialysis paper comprises the step of manufacturing base paper.
9. The method for preparing high permeability dialysis paper as claimed in claim 7, wherein: the surface sizing agent comprises starch, polyvinyl alcohol and an auxiliary agent.
10. A highly breathable dialysis paper prepared by the method of any one of claims 7 to 9.
CN202110281227.8A 2021-03-16 2021-03-16 High-permeability dialysis paper and preparation method thereof Active CN113136742B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110281227.8A CN113136742B (en) 2021-03-16 2021-03-16 High-permeability dialysis paper and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110281227.8A CN113136742B (en) 2021-03-16 2021-03-16 High-permeability dialysis paper and preparation method thereof

Publications (2)

Publication Number Publication Date
CN113136742A true CN113136742A (en) 2021-07-20
CN113136742B CN113136742B (en) 2022-08-05

Family

ID=76811115

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110281227.8A Active CN113136742B (en) 2021-03-16 2021-03-16 High-permeability dialysis paper and preparation method thereof

Country Status (1)

Country Link
CN (1) CN113136742B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113914124A (en) * 2021-11-08 2022-01-11 华邦特西诺采新材料股份有限公司 Modified nano-cellulose and application thereof in preparation of base paper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王淑花等: "丙烯酰胺对粘胶纤维的表面接枝改性研究", 《第五届两岸纺织科技研讨会》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113914124A (en) * 2021-11-08 2022-01-11 华邦特西诺采新材料股份有限公司 Modified nano-cellulose and application thereof in preparation of base paper

Also Published As

Publication number Publication date
CN113136742B (en) 2022-08-05

Similar Documents

Publication Publication Date Title
EP0752028B1 (en) Cellulosic products using high-bulk cellulosic fibers
CN110088220B (en) Corrugated board comprising a binder containing starch and finely fibrillated cellulose
US6911114B2 (en) Tissue with semi-synthetic cationic polymer
EP1581692B1 (en) Amino-functionalized pulp fibers
MX2007003844A (en) Absorbent articles comprising thermosplastic resin pretreated fibers.
JPH07107234B2 (en) Method for treating papermaking pulp with an enzyme formulation
US20020088582A1 (en) Method for adding an adsorbable chemical additive to pulp during the pulp processing and products made by said method
WO2012098296A2 (en) Method for improving strength and retention, and paper product
KR101741385B1 (en) Tissue having reduced hydrogen bonding
SE1651026A1 (en) Process for creating foam in a process for making a paper orboard product
CN114622436B (en) Method for enhancing mechanical properties of nano dialysis paper for high-resistance bacteria medical protection in environment-friendly manner
CN113136742B (en) High-permeability dialysis paper and preparation method thereof
CN115075058A (en) Degradable oil-proof barrier paper and preparation process thereof
JP2021522380A (en) Methods for Producing Adhesives Containing Starch and Microfibrillated Cellulose, Corrugated Cardboard, and Adhesives
CA2335466C (en) Paper towel
CN1332818A (en) Kraft wood fibers for carboxyalkyl cellulose
EP3728421A1 (en) Films of microfibrillated cellulose
JP2012162814A (en) Cellulose fiber sheet
CA3121192A1 (en) Tissue paper with reduced fiber and methods of manufacture
SE543116C2 (en) A method for preparing a film of crosslinked microfibrillated cellulose
JPS6233874A (en) Production of modified cellulose fiber
US20210277265A1 (en) Cross-linkable cellulose as 3d printing material
WO2022219519A1 (en) A multilayered moulded product and method for the preparation thereof
CN116813807A (en) Super strong nanocellulose-based wet strength agent for papermaking and preparation method thereof
JP2004285529A (en) Formed product of water-resistant/oil-resistant cellulose and method for producing the formed product

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant