CN112501942A - Medical dialyzing paper and production method thereof - Google Patents
Medical dialyzing paper and production method thereof Download PDFInfo
- Publication number
- CN112501942A CN112501942A CN202011261818.0A CN202011261818A CN112501942A CN 112501942 A CN112501942 A CN 112501942A CN 202011261818 A CN202011261818 A CN 202011261818A CN 112501942 A CN112501942 A CN 112501942A
- Authority
- CN
- China
- Prior art keywords
- paper
- pulp
- medical dialyzing
- dialyzing paper
- medical
- 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
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
- D21H27/10—Packing paper
-
- 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
Landscapes
- Paper (AREA)
Abstract
The application discloses medical dialyzing paper and a production method thereof. The production method of the medical dialyzing paper comprises the steps of mixing pulp, namely mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion to obtain mixed pulp; and manufacturing the mixed paper pulp to form the medical dialyzing paper. This application carries out the medical dialyzing paper of making the obtaining through the mixed paper pulp that uses certain proportion's softwood pulp, chitosan fiber and bamboo fibre, when guaranteeing paper intensity, also makes the paper have better fungus resistance nature, is showing to promote the quality of domestic medical dialyzing paper, reduces because of the emergence of the medical malpractice that medical dialyzing paper quality leads to, reduces the manufacturing cost of medical dialyzing paper.
Description
Technical Field
The application relates to the field of special paper for medical packaging, in particular to medical dialyzing paper and a production method thereof.
Background
The medical instrument sterilization package (medical package for short) refers to a packaging system applied to medical instruments needing sterilization, can perform sterilization after packaging and provides bacteria-blocking protection for the medical instruments before use, and relates to a scene that a disposable sterile medical instrument production enterprise performs sterilization after packaging products, and a hospital sterilization supply center performs sterilization storage for next use after packaging, sealing and sealing the reusable medical instruments. Compared with the traditional mode of repackaging after sterilization, the terminal sterilization mode strengthens the control of the sterilization sufficiency of the medical apparatus and the contamination risk in the whole flow of transportation, storage and use, and the use safety is obviously improved.
Medical device sterilization packages are divided into protective packages and Sterile Barrier Systems (SBS), wherein the sterile barrier systems are key components of sterilization packages and are a major concern in the sterilization packaging industry. The sterile barrier system is constructed depending on the selection and processing of the appropriate dialysis packaging material. Compared with non-woven fabrics, the medical dialyzing paper has the characteristics of low price, convenient use and the like, can be subjected to heat sealing or glue sealing with film materials such as PE polyethylene, PP polypropylene and the like, and is often used as a sterilization packaging material for medical instruments in the medical packaging industry. With the development of paper making technology, medical dialyzing paper and the like are widely applied to a sterile barrier system.
The medical dialyzing paper has higher requirements on certain performances, such as specific requirements on paper strength, bacteria resistance, air permeability and the like, the performance of domestic paper is difficult to reach the standard, and the price of foreign imported paper is high, so that the high-grade medical dialyzing paper is in the condition of short supply and short demand.
Disclosure of Invention
The application mainly provides medical dialyzing paper and a production method thereof, and aims to solve the problems that the existing domestic paper cannot meet the special performance requirements of the medical dialyzing paper easily, and the production cost of the medical dialyzing paper is high.
In order to solve the technical problem, the application adopts a technical scheme that: a production method of medical dialyzing paper is provided, which comprises the following steps: mixing pulp, namely mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion to obtain mixed pulp; and manufacturing the mixed paper pulp to form the medical dialyzing paper.
Wherein, mix the thick liquid, mix the softwood pulp of certain proportion, chitosan fiber and bamboo fiber and obtain mixed paper pulp, include: mixing 50-70% of softwood pulp, 10-20% of chitosan fiber and 20-30% of bamboo fiber by mass percent to obtain mixed paper pulp.
Wherein, carry out the paper making to mixed paper pulp and form medical dialyzing paper, include: and forming, dewatering, pre-drying, surface sizing, post-drying and calendaring the mixed paper pulp to obtain the medical dialyzing paper.
Wherein the amount of the sizing agent adopted for surface sizing is 2-4 g/m2The sizing agent is a mixture of starch and PVA polyvinyl alcohol, wherein the mass percent of the starch is 60-80%, and the mass percent of the PVA polyvinyl alcohol is 20-40%.
Wherein, mix the thick liquid, mix the softwood pulp of certain proportion, chitosan fiber and bamboo fiber and obtain mixed paper pulp, still include: adding a chemical auxiliary agent into the mixed paper pulp; the chemical auxiliary agent is at least one of internal sizing agent, wet strength agent and reinforcing agent.
Wherein, the internal sizing agent is at least one of AKD alkyl ketene dimer and ASA alkenyl succinic anhydride, the wet strength agent is PAE polyamide polyepichlorohydrin resin, and the reinforcing agent is filled starch.
The production method of the medical dialyzing paper comprises a pulp grinding process, wherein the pulp grinding process is used for grinding softwood pulp, chitosan fiber and bamboo fiber respectively before pulp mixing, so that the freeness of each pulp is 480-520 ml.
In order to solve the above technical problem, another technical solution adopted by the present application is: provides medical dialyzing paper, the fiber structure of which is the mixture of softwood pulp fiber, chitosan fiber and bamboo fiber.
Wherein, the mass percent of the softwood pulp fiber in the fiber structure is 50-70%, the mass percent of the chitosan fiber is 10-20%, and the mass percent of the bamboo fiber is 20-30%.
Wherein the aperture of the medical dialyzing paper is less than 3 microns.
The beneficial effect of this application is: being different from the situation of the prior art, the production method of the medical dialyzing paper disclosed by the application uses the mixed paper pulp of the softwood pulp, the chitosan fiber and the bamboo fiber in a certain proportion to carry out papermaking, ensures the strength of the paper, simultaneously enables the paper to have better bacteria resistance, meets the performance requirement of the medical dialyzing paper, obviously improves the quality of the domestic medical dialyzing paper, and reduces medical accidents caused by poor quality of the medical dialyzing paper. The softwood pulp provides better strength characteristics of paper, and comprises better toughness and stretchability, the chitosan fiber and the bamboo fiber have better antibacterial activity, so that the paper has better antibacterial activity, the cost of the bamboo fiber is lower, and the chitosan fiber and the bamboo fiber are mixed, so that the antibacterial activity of the paper is ensured to be good, and the production cost of the medical dialyzing paper can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:
FIG. 1 is a schematic flow chart illustrating an embodiment of a method for producing medical dialysis paper according to the present application;
FIG. 2 is a schematic flow chart diagram illustrating one embodiment of step 102 of FIG. 1;
FIG. 3 is a schematic flow chart illustrating another embodiment of a method for producing medical dialysis paper according to the present application;
fig. 4 is a schematic flow chart of a method for producing medical dialyzing paper according to another embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for producing medical dialyzing paper provided by the present application.
S101: mixing pulp, namely mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion to obtain mixed pulp.
The paper pulp is a fibrous substance prepared by using plant fibers as raw materials through different processing methods, and is a main raw material in the paper industry. The plant fibers in the pulp are mainly derived from wood, which provides 93% of the plant fibers worldwide. Pulp is classified into wood pulp and non-wood pulp, and wood pulp is further classified into hardwood pulp and softwood pulp. Common softwood pulp species are: scandinavian pine, radiata pine, southern pine, redwood, Cedar, hemlock, white pine, such as white spruce, black pine, Douglas fir, larch, balsam fir, mountain fir, etc. The softwood pulp has longer fibers and less impurities, and the paper made of the softwood pulp has good toughness, high folding strength, better tensile strength and good printing performance. Hardwood pulp has shorter fiber length and contains more impurities. Paper made from hardwood pulp is relatively weak and can be more easily damaged as medical dialysis paper, potentially increasing the risk of damage to medical dialysis paper during and after packaging and prior to sterilization, transportation and use of the device. In addition, the paper made of hardwood pulp is easy to have the situation that fine fibers fall off, and when the paper is used as a medical dialyzing paper packaging device and the like, the fibers can fall off into the products such as the device and the like, so that the normal use of the products such as the device and the like is influenced. Softwood pulp has a higher tenacity and stretchability than hardwood pulp, and may provide strength characteristics to medical dialysis paper, including paper tenacity and stretchability.
Bamboo fibers, which may also be referred to as bamboo pulp, are non-wood pulps. Non-wood pulp refers to pulp made from grasses, reeds, bamboo, and cotton and hemp, among others. The bamboo pulp is prepared from Phyllostachys pubescens, and Sagittaria sagittifolia as raw materials, and the fiber shape and length are between those of wood and grass fiber. The bamboo fiber has natural antibacterial, bacteriostatic and bactericidal effects, so that the paper has good antibacterial property and good air permeability. At present, wood resources in China are few, most of the wood resources are imported, the price is high, bamboo forest resources in China are rich, bamboo pulp is from bamboo, the bamboo is a regeneration plant, and the bamboo pulp has the characteristics of strong reproductive capacity, short growth period, excellent material quality and the like. The bamboo pulp replaces or partially replaces wood pulp, so that the use amount of the wood pulp is reduced, the cost of paper can be reduced to a certain extent, the application of the bamboo pulp can promote the economic development of bamboo forestry in China, the reduction speed of wood resources in China can be relieved, the contradiction of wood shortage in pulping and papermaking industries in China can be relieved, and the ecological environment can be protected. The average fineness of the bamboo fibers can be 2-10 dtex, specifically 2dtex, 4dtex, 6dtex, 8dtex or 10 dtex. The average strength of the bamboo fiber can be 3.0-4.0 cN/dtex, specifically 3.20cN/dtex, 3.40cN/dtex, 3.49cN/dtex, 3.60cN/dtex, 3.8cN/dtex, 4.0 cN/dtex. The average length of the bamboo fibers can be 80-110 mm, and specifically can be 80mm, 85mm, 90mm, 95mm, 100mm, 105mm or 110 mm.
The chitosan fiber is a biomass regenerated fiber, is produced by taking marine organisms such as shrimps, crabs and shell wastes as raw materials, and has very good antibacterial activity. The chitosan fiber surface has cation groups, has good adsorption to bacteria, and has antibacterial and bacteria reproduction inhibiting effects. Specifically, the chitosan fiber may have a linear density of 1.2 to 2.0dtex, specifically 1.2dtex, 1.4dtex, 1.6dtex, 1.8dtex, or 2.0 dtex. The breaking strength of the chitosan fiber can be 1.4-2.0 cN/dtex, specifically 1.4cN/dtex, 1.6cN/dtex, 1.8cN/dtex live 2.0 cN/dtex. The chitosan fiber with linear density and breaking strength has high rigidity and is not easy to curl.
In this embodiment, medical dialyzing paper uses the mixed paper pulp that softwood pulp, chitosan fiber and bamboo fiber mixture obtained, can guarantee that the intensity of paper is better, and tensile strength is good, and the air permeability is high, and has better fungus resistance, and the wrapping bag intensity is moulded to the paper that makes is high, carries out the mode such as high temperature steam sterilization and uses all be difficult for breaking after and the disinfection, also is difficult for breeding the bacterium.
The method comprises the following steps of mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion to obtain mixed paper pulp, and specifically mixing the softwood pulp with the mass percentage of 50% -70%, the chitosan fiber with the mass percentage of 10% -20% and the bamboo fiber with the mass percentage of 20% -30% to obtain the mixed paper pulp. The mass percentage of the softwood pulp in the mixed paper pulp is 50-70%, and specifically can be 50%, 55%, 60%, 65% and 70%. The chitosan fiber accounts for 10-20% by mass, and specifically can account for 10%, 15%, 18% and 20%. The bamboo fiber accounts for 20-30% by mass, and specifically can account for 20%, 22%, 25%, 28% and 30%. The mass percentage is the mass percentage of the total amount of the pulp fibers, or may be the mass percentage of the total amount of the pulp, and although other substances such as chemical auxiliaries may be added to the pulp, the amount added is very small relative to the total amount of the pulp, and the amount of the fibers is mainly in the total amount of the pulp. That is to say, the medical dialyzing paper produced according to the production method of the medical dialyzing paper has a fiber structure of a mixture of softwood pulp fibers, chitosan fibers and bamboo fibers, wherein the softwood pulp fibers account for 50-70% of the fiber structure by mass, the chitosan fibers account for 10-20% of the fiber structure by mass, and the bamboo fibers account for 20-30% of the fiber structure by mass. Wherein 50-70% of the softwood pulp fibers provide better strength characteristics of the paper, including better toughness, tensile strength and tensile resistance. The bamboo fiber and the chitosan have bacteriostatic effects, 10% -20% of the chitosan fiber and 20% -30% of the bamboo fiber enable the paper to be high in air permeability and provide good bacterium resistance performance for the paper, the bamboo fiber is low in cost, and the 20% -30% of the bamboo fiber partially replaces softwood pulp to be mixed with the chitosan fiber, so that the good bacteriostatic property of the paper is guaranteed, and the production cost of the medical dialyzing paper can be reduced. The paper pulp with the proportion ensures the strength of the paper, simultaneously ensures that the paper has better bacteria resistance, meets the performance requirement of medical dialyzing paper, obviously improves the quality of domestic medical dialyzing paper, and reduces medical accidents caused by poor quality of the medical dialyzing paper.
Before the mixed paper pulp is made into paper, some chemical additives can be added into the mixed paper pulp to make the paper pulp into paper better or to improve the performance of paper, such as the strength and evenness of the paper. For example, one or more of internal sizing agents, wet strength agents and reinforcing agents may be added, as well as other chemical aids, not specifically illustrated herein.
The internal sizing agent mainly comprises rosin size, ASA alkenyl succinic anhydride and AKD alkyl ketene dimer, wherein the rosin size belongs to an acid sizing agent, both the ASA and the AKD are neutral sizing agents, and the rosin size may corrode equipment to a certain extent. The addition of an internal sizing agent can enhance the moisture resistance and water resistance of the paper and also help to improve the strength of the paper. In this embodiment, the internal sizing agent may be either AKD alkyl ketene dimer or ASA alkenyl succinic anhydride, or may include both AKD alkyl ketene dimer and ASA alkenyl succinic anhydride. In one embodiment, an internal sizing agent is added into the mixed paper pulp, wherein the internal sizing agent is ASA and AKD, and the addition amount of the ASA and the AKD is 1-2 kg and 10-20 kg per ton of paper. Specifically, the addition amount of ASA may be 1.2kg, 1.5kg, 1.8kg and 2kg per ton of paper, and the addition amount of AKD may be 10kg, 12kg, 15kg, 18kg and 20kg per ton of paper. A critical value may exist in the addition volume of a kind of glue, and when the addition volume is less than the critical value, along with the increase of sizing agent volume, can increase great to paper performance, when closing on the critical value or surpassing the back, very little or probably do not have the influence to paper performance, can not strengthen the performance of paper, consequently chooses for use two kinds of glues, relevant performances such as reinforcing paper water resistance that can be better. In another specific embodiment, an internal sizing agent is added into the mixed paper pulp, wherein the internal sizing agent is ASA, and the addition amount of the internal sizing agent is 1-3 kg, specifically 2kg, per ton of paper.
The addition of the wet strength agent can increase the wet strength of the paper. At present, the sterilization modes of sterilization packaging materials in China are mainly an ETO ethylene oxide sterilization method and a high-temperature wet-hot steam method, so that medical dialyzing paper used as sterilization packaging can be soaked, the strength of the soaked paper can be reduced, and the paper strength is reduced mainly because the hydroxyl groups of cellulose on the surface of fibers are saturated by water, so that hydrogen bonds are broken, and the fibers are combined by a water bridge. And after the medical dialyzing paper is sterilized, the medical dialyzing paper still needs better paper strength so as to avoid the failure of a sterile system caused by the damage of packages after sterilization. Therefore, a wet strength agent can be added into the mixed pulp to increase the wet strength of the paper, ensure that the medical dialyzing paper used as the sterilized package can still keep better strength after ethylene oxide sterilization or high-temperature damp-heat steam sterilization, and ensure that the sterile barrier including the medical dialyzing paper and the objects in the package is good. The wet strength is generally referred to as the tensile strength after a given period of immersion in water, and can also be expressed as the retention of tensile strength after a given period of immersion in water.
The most widely used wet strength agent at present is polyamide polyepichlorohydrin resin (PAE), the PAE is water-soluble, cationic and thermosetting resin, does not contain formaldehyde polymer, is nontoxic and tasteless, can be manufactured under the conditions of neutrality, alkalescence and acidity, and has wide pH value application range. In the embodiment, the PAE is selected as the wet strength agent, and the adding amount of the PAE can be 50-70 kg per ton of paper, and can be added during pulp mixing. In other embodiments, other wet strength agents may be used, and are not limited herein. In addition, PAE has synergistic effect on AKD, and the use of PAE can reduce the dosage of AKD. PAE also has a significant effect on the air permeability of medical dialysis paper.
By adding a reinforcing agent to the mixed pulp, the paper force can be further improved and the retention can be improved. Particularly, the strength of the paper is improved, fibers and chemicals can be adsorbed, and the retention rate is increased. For example, the enhancing agent may be a starch, such as an inner filled starch. The solid state of the starch can be left in the paper and is used as a part of fiber slurry, and the starch can adsorb fibers and chemicals, for example, the added chemical auxiliary agent can keep the fibers and the chemical auxiliary agent in a fiber layer, so that the loss of the chemical auxiliary agent is reduced, more chemical auxiliary agents can play corresponding roles in the paper, the quality of the active part of the added chemical auxiliary agent can be improved to a certain extent by the starch, and the adding amount of the chemical auxiliary agent can be indirectly reduced. The adding amount of the starch for filling can be 10-15 kg per ton of paper, specifically 10kg, 12kg, 13kg or 15kg, and the adding amount of the starch for filling of 10-15 kg per ton of paper can obviously improve the paper strength and improve the adsorption and retention amount of fibers and chemicals in the paper.
The paper pulp can also be added with a dry strength agent, so that the mechanical strength of the paper can be increased, the medical dialyzing paper has certain mechanical strength, and the damage risk of the medical dialyzing paper can be reduced before instruments and the like are packaged, sterilized after being packaged, transported and used. The dry strength agent used may be anionic, cationic starch, cationic polyacrylamide, zwitterionic polyacrylamide or graft copolymer.
The production method of the medical dialyzing paper further comprises a pulp grinding process, wherein before pulp mixing, the pulp grinding process is used for grinding the softwood pulp, the chitosan fiber and the bamboo fiber respectively to enable the freeness of each pulp to be 480-520 mL.
S102: and manufacturing the mixed paper pulp to form the medical dialyzing paper.
The mixed paper pulp is subjected to a plurality of different processing procedures such as paper making and the like, and finally medical dialyzing paper is formed. Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of step 102 in fig. 1. The method for manufacturing the medical dialyzing paper by the mixed paper pulp comprises the following steps.
S201: the mixed pulp is formed.
The mixed paper pulp is formed on the net part to form paper preliminarily.
S202: and (4) dehydrating.
The preliminarily formed paper is pressed and dewatered by a pressing part, and a roller type continuous pressing or an intermittent pressing can be adopted.
S203: and drying.
The dewatered paper is subjected to pre-drying, i.e. primary drying. Drying can be drying by a drying cylinder, drying by a hot air box or auxiliary infrared drying.
S204: and (4) surface sizing.
In the embodiment, the amount of the sizing agent used for surface sizing is 2-4 g/m2The sizing agent is a mixture of starch and PVA polyvinyl alcohol, wherein the mass percent of the starch is 60-80%, and the mass percent of the PVA polyvinyl alcohol is 20-40%.
The surface sizing has important influence on the air permeability of the medical dialyzing paper, the aperture of the paper can be reduced, and bacteria can be prevented from permeating. And the surface sizing can improve the internal bonding strength and the surface performance of the paper, so that the medical dialyzing paper has no paper wool when the sterilized packaging product is opened, the peeling structure is continuous and uniform, and the medical dialyzing paper does not pollute medical instruments after the sterilized packaging product is opened. The PVA polyvinyl alcohol has good film forming property, can improve the paper sealing property, reduce the paper aperture, reduce the microorganism transmittance and enable the paper to have the bacteria resistance. The starch is subjected to surface sizing, so that the strength can be improved, the phenomena of paper surface hair falling and powder falling can be reduced, instruments in a package are prevented from being polluted, the smoothness of the paper can be improved, and the paper surface is finer and smoother. The starch is low in price, the starch and the PVA are used as the surface sizing agent, the aperture of the paper is reduced while the performance of the paper is ensured, the penetration of microorganisms is reduced, and the production cost of the paper can be reduced.
S205: and then drying.
The surface sized paper is subjected to a second drying, i.e. post-drying. The post-drying can be drying by a drying cylinder, drying by a hot air box or auxiliary infrared drying.
S206: and calendaring to obtain the medical dialyzing paper.
And calendaring the paper subjected to secondary drying by a calendar to obtain the medical dialyzing paper. The calendering is divided into soft calendering and hard calendering, in the embodiment, the calendering is the hard calendering, and the pressure range can be 50-80 kg/cm2. In other embodiments, soft calendering may be used. The calendering can promote the surface property of paper, reduces paper thickness, reduces the paper aperture, reduces the gas permeability of dialysis paper to separation bacterium and dust, but allow ethylene oxide gas or steam to permeate through, thereby can disinfect and can prevent that the microorganism from passing the dialysis paper that disinfects.
After being calendered, the medical dialyzing paper is formed, and is rolled and packaged, so that the medical dialyzing paper is convenient to transport and further process and use.
The medical dialyzing paper produced by the production method of the medical dialyzing paper in the embodiment detects the paper performance of the medical dialyzing paper, and meets the performance requirement of the medical dialyzing paper. The detection specifically comprises pore size, tensile strength, wet strength ratio, agar contact attack test and the like. The medical dialyzing paper produced by the production method has the average pore diameter of less than 3 mu m, the tensile strength of more than 8Kgf/15mm and the wet strength ratio of more than 20 percent, and the medical dialyzing paper accords with an agar contact attack test. Wherein, the pore diameter can be the maximum pore diameter or the average pore diameter. The average pore size can be detected by selecting a paper sample with a certain size, such as 5cm by 5cm, and automatically acquiring the average pore size of the paper sample through a pore size detector, wherein the average pore size of the paper sample is equivalent to the average pore size of the medical dialysis paper. In order to improve the detection accuracy, a plurality of paper patterns can be selected, the average pore diameter of the plurality of paper patterns is detected, and the average value is obtained, wherein the average value is the average pore diameter of the medical dialyzing paper. The aperture is less than 3 μm, which can not only prevent most bacteria from entering, but also keep good air permeability of the paper. The bacteria entering the micropores can not be propagated and grown under the action of the chitosan fibers and the bamboo fibers, so that the paper has good bacteria resistance.
The tensile strength was measured by a tensile strength tester to test the stretchability of a material such as paper. Tensile strength is also referred to as tensile strength or tear strength. The tensile strength referred to in this application is greater than 8Kgf/15mm, where the unit of tensile strength is Kgf/15mm, where Kgf is kilogram-force (kilogram-force), or kilogram force, is a common unit of force. 1 kilogram force refers to the gravitational force experienced by a 1 kilogram object. 15mm is the width of the selected test sheet, i.e. a 15mm wide sheet is used for tensile strength testing. The tensile strength of the paper sheet is measured at 8, where the tensile strength is specifically the machine direction tensile strength.
The wet strength ratio is the ratio of the tensile strength of the paper after soaking to the normal tensile strength of the dry paper, which indicates the retention rate of the tensile strength of the paper after soaking, and indicates the wet strength of the paper to a certain extent. The medical dialyzing paper has high wet strength, can ensure better strength in the sterilization process and after sterilization, reduces the damage probability of sterilization package, and reduces the probability of sterile failure and repeated sterilization.
The procedure of the agar contact challenge test can be referred to DIN58953-6:2016, and the specific procedures can be as follows: the sterilized sample was transferred to a sterile plate, and the staphylococcus aureus suspension was dropped on the outer surface of the sample and dried at 19-25 ℃ for 16 hours. Completely paving the inner and outer surfaces of the bacterial-contaminated sample wafer on the surface of a blood agar plate, culturing the blood agar plate at 37 ℃ for 24h, and observing the growth condition of bacteria; if the bacteria-free colonies grow on the blood agar plate, the antibacterial property of the sample is good.
The production method of the medical dialyzing paper comprises a pulp grinding process, wherein before pulp mixing, the pulp grinding process is used for grinding softwood pulp, chitosan fiber and bamboo fiber respectively to enable the freeness of each pulp to be 480-520 mL. The freeness has important influence on the air permeability of the medical dialyzing paper, and the proper freeness can enable the air permeability to be in a proper range, allow ethylene oxide gas or steam to permeate through, and block bacteria and dust. The freeness is controlled to be 480-520 mL, and the openness and air permeability of the paper can be improved.
Referring to fig. 3, fig. 3 is a schematic flow chart of another embodiment of a method for producing medical dialyzing paper according to the present application.
S301: and (3) pulping the softwood pulp, the chitosan fiber and the bamboo fiber pulp respectively, and controlling the freeness of each pulp to be 480-520 mL through pulping.
S302: 60 parts of softwood pulp, 10 parts of chitosan fiber and 30 parts of bamboo fiber are mixed in a bulk pulp barrel to obtain mixed paper pulp.
S303: adding chemical additives into the mixed paper pulp, wherein 10kg of filling starch, 2kg of ASA, 10kg of AKD and 50kg of PAE are added into each ton of paper.
S304: the mixed pulp is formed, dewatered and dried before being processed.
S305: the front and back sides of the paper were surface sized using 80% starch and 20% PVA as surface sizing agents.
S306: and drying and calendaring to obtain the medical dialyzing paper.
The obtained medical dialyzing paper is detected, the average pore diameter is 2.5 mu m (less than 3 mu m), the tensile strength is 8.5Kgf/15mm (more than 8Kgf/15mm), the wet strength ratio is 22 percent (more than 20 percent), and the medical dialyzing paper accords with the agar contact attack test and can meet the performance requirement of the medical dialyzing paper.
Referring to fig. 4, fig. 4 is a schematic flow chart of a method for producing medical dialyzing paper according to another embodiment of the present application.
S401: and (3) pulping the softwood pulp, the chitosan fiber and the bamboo fiber pulp respectively, and controlling the freeness of each pulp to be 480-520 mL through pulping.
S402: 60 parts of needle leaf pulp, 20 parts of chitosan fiber and 20 parts of bamboo fiber are mixed in a pulp dispersing barrel to obtain mixed paper pulp.
S403: adding chemical additives into the mixed paper pulp, wherein 10kg of filling starch, 2kg of ASA, 10kg of AKD and 70kg of PAE are added into each ton of paper.
S404: the mixed pulp is formed, dewatered and dried before being processed.
S405: the front and back sides of the paper were surface sized using 60% starch and 40% PVA as surface sizing agents.
S406: and drying and calendaring to obtain the medical dialyzing paper.
The obtained medical dialyzing paper is detected, the average pore diameter is 2.0 mu m (less than 3 mu m), the tensile strength is 9.5Kgf/15mm (more than 8Kgf/15mm), the wet strength ratio is 26 percent (more than 20 percent), and the medical dialyzing paper meets the performance requirement of the medical dialyzing paper in agar contact attack test.
This application is through using high strength and antibiotic thick liquids, cooperation chemical auxiliary agent and surface sizing prescription, very big promotion paper intensity and hinder the bacterial nature, show the quality that promotes domestic medical dialyzing paper, reduce the medical accident because of medical dialyzing paper quality is not good and lead to.
The application also provides medical dialyzing paper, and the fiber structure of the medical dialyzing paper is the mixture of softwood pulp fibers, chitosan fibers and bamboo fibers. Specifically, in the fiber structure of the medical dialyzing paper, the mass percent of the softwood pulp fibers is 50-70%, the mass percent of the chitosan fibers is 10-20%, the mass percent of the bamboo fibers is 20-30%, and the aperture of the medical dialyzing paper is smaller than 3 microns. The medical dialyzing paper has better paper strength and bacterium resistance, meets the performance requirement of the medical dialyzing paper, and has lower cost.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (10)
1. A method for producing medical dialyzing paper is characterized by comprising the following steps:
mixing pulp, namely mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion to obtain mixed pulp;
and manufacturing the mixed paper pulp to form the medical dialyzing paper.
2. The method for producing medical dialyzing paper according to claim 1, wherein the mixing pulp is obtained by mixing softwood pulp, chitosan fiber and bamboo fiber in a certain proportion, and comprises the following steps:
mixing 50-70% of softwood pulp, 10-20% of chitosan fiber and 20-30% of bamboo fiber by mass percent to obtain the mixed paper pulp.
3. The method for producing medical dialyzing paper according to claim 1, wherein the papermaking of the mixed pulp to form the medical dialyzing paper comprises:
and forming, dehydrating, drying, applying glue on the surface, drying, and calendaring the mixed paper pulp to obtain the medical dialyzing paper.
4. The method for producing medical dialyzing paper according to claim 3, wherein the amount of the sizing agent used for surface sizing is 2 to 4g/m2The sizing agent is a mixture of starch and PVA (polyvinyl alcohol), wherein the mass percent of the starch is 60-80%, and the mass percent of the PVA polyvinyl alcohol is 20-40%.
5. The method for producing medical dialyzing paper according to claim 1, wherein the mixed pulp is obtained by mixing softwood pulp, chitosan fiber and bamboo fiber in a certain ratio, and further comprises:
adding a chemical auxiliary agent to the mixed pulp; the chemical auxiliary agent is at least one of internal sizing agent, wet strength agent and reinforcing agent.
6. The method for producing medical dialyzing paper according to claim 5, characterized in that the internal sizing agent is at least one of AKD alkyl ketene dimer and ASA alkenyl succinic anhydride, the wet strength agent is PAE polyamide polyepichlorohydrin resin, and the reinforcing agent is filled starch.
7. The method for producing medical dialyzing paper according to claim 1, characterized by comprising a refining step of refining the softwood pulp, the chitosan fiber and the bamboo fiber before the pulp mixing step, so that the freeness of each pulp is 480 to 520 ml.
8. The medical dialyzing paper is characterized in that the fiber structure of the medical dialyzing paper is the mixture of softwood pulp fibers, chitosan fibers and bamboo fibers.
9. The medical dialyzing paper according to claim 8, wherein the fiber structure comprises 50 to 70 mass percent of softwood pulp fibers, 10 to 20 mass percent of chitosan fibers and 20 to 30 mass percent of bamboo fibers.
10. The medical dialysis paper of claim 8, wherein the medical dialysis paper has a pore size of less than 3 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011261818.0A CN112501942B (en) | 2020-11-12 | 2020-11-12 | Medical dialyzing paper and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011261818.0A CN112501942B (en) | 2020-11-12 | 2020-11-12 | Medical dialyzing paper and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112501942A true CN112501942A (en) | 2021-03-16 |
| CN112501942B CN112501942B (en) | 2022-11-11 |
Family
ID=74957169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011261818.0A Active CN112501942B (en) | 2020-11-12 | 2020-11-12 | Medical dialyzing paper and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112501942B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089380A (en) * | 2021-03-26 | 2021-07-09 | 浙江科技学院 | Heat-sealing self-adhesive high-strength medical dialyzing paper and processing method thereof |
| CN114622436A (en) * | 2022-04-25 | 2022-06-14 | 浙江科技学院 | Method for enhancing mechanical properties of nano dialysis paper for high-resistance bacteria medical protection in environment-friendly manner |
| CN114875717A (en) * | 2022-04-25 | 2022-08-09 | 浙江科技学院 | Preparation method of degradable high-bacterium-resistance nano dialysis paper for medical protection |
| CN116876257A (en) * | 2023-08-10 | 2023-10-13 | 华邦古楼新材料有限公司 | Heat-sealing self-adhesive high-strength medical dialysis paper and processing method thereof |
| US11840806B2 (en) | 2022-04-25 | 2023-12-12 | Zhejiang University Of Science And Technology | Environmentally-friendly method for enhancing mechanical properties of high antibacterial nano dialysis paper for medical protection |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828283A (en) * | 2012-09-10 | 2012-12-19 | 东华大学 | Method for preparing chitosan and cellulose complex fibers by binary solvent system |
| CN105970719A (en) * | 2016-05-26 | 2016-09-28 | 福建希源纸业有限公司 | Medical dialyzing paper |
| CN107789659A (en) * | 2017-11-16 | 2018-03-13 | 安徽斯麦特医学技术开发有限公司 | A kind of medical protection pad |
| CN108660859A (en) * | 2018-04-23 | 2018-10-16 | 华邦古楼新材料有限公司 | Medical package dialyzing paper and its manufacturing method |
| CN109235105A (en) * | 2018-07-23 | 2019-01-18 | 华南理工大学 | A method of chitin fiber paper base material is prepared based on wet papermaking technology |
| CN109853297A (en) * | 2019-03-11 | 2019-06-07 | 南京林业大学 | Medical dialysis body paper and its production method |
| CN110670243A (en) * | 2019-10-28 | 2020-01-10 | 福建恒安集团有限公司 | Preparation method of bamboo fiber reinforced non-woven fabric and application of bamboo fiber reinforced non-woven fabric in maternity towel |
-
2020
- 2020-11-12 CN CN202011261818.0A patent/CN112501942B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828283A (en) * | 2012-09-10 | 2012-12-19 | 东华大学 | Method for preparing chitosan and cellulose complex fibers by binary solvent system |
| CN105970719A (en) * | 2016-05-26 | 2016-09-28 | 福建希源纸业有限公司 | Medical dialyzing paper |
| CN107789659A (en) * | 2017-11-16 | 2018-03-13 | 安徽斯麦特医学技术开发有限公司 | A kind of medical protection pad |
| CN108660859A (en) * | 2018-04-23 | 2018-10-16 | 华邦古楼新材料有限公司 | Medical package dialyzing paper and its manufacturing method |
| CN109235105A (en) * | 2018-07-23 | 2019-01-18 | 华南理工大学 | A method of chitin fiber paper base material is prepared based on wet papermaking technology |
| CN109853297A (en) * | 2019-03-11 | 2019-06-07 | 南京林业大学 | Medical dialysis body paper and its production method |
| CN110670243A (en) * | 2019-10-28 | 2020-01-10 | 福建恒安集团有限公司 | Preparation method of bamboo fiber reinforced non-woven fabric and application of bamboo fiber reinforced non-woven fabric in maternity towel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089380A (en) * | 2021-03-26 | 2021-07-09 | 浙江科技学院 | Heat-sealing self-adhesive high-strength medical dialyzing paper and processing method thereof |
| CN114622436A (en) * | 2022-04-25 | 2022-06-14 | 浙江科技学院 | Method for enhancing mechanical properties of nano dialysis paper for high-resistance bacteria medical protection in environment-friendly manner |
| CN114875717A (en) * | 2022-04-25 | 2022-08-09 | 浙江科技学院 | Preparation method of degradable high-bacterium-resistance nano dialysis paper for medical protection |
| WO2023207377A1 (en) * | 2022-04-25 | 2023-11-02 | 浙江科技学院 | Environment-friendly method for enhancing mechanical properties of high-bacterial-resistance nano-dialysis paper for medical protection |
| US11840806B2 (en) | 2022-04-25 | 2023-12-12 | Zhejiang University Of Science And Technology | Environmentally-friendly method for enhancing mechanical properties of high antibacterial nano dialysis paper for medical protection |
| CN116876257A (en) * | 2023-08-10 | 2023-10-13 | 华邦古楼新材料有限公司 | Heat-sealing self-adhesive high-strength medical dialysis paper and processing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112501942B (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112501942B (en) | Medical dialyzing paper and production method thereof | |
| US6156677A (en) | Cellulose-Based medical packaging material sterilizable by oxidizing gas plasma | |
| EP0752028B1 (en) | Cellulosic products using high-bulk cellulosic fibers | |
| RU2428535C2 (en) | Method to produce paper product | |
| US3325345A (en) | Process of forming water-laid products from cellulosic pulp containing polymeric thermoplastic particles | |
| CN110792003B (en) | Hydrophobic oil-resistant food packaging paper and preparation method thereof | |
| US5906894A (en) | Multi-ply cellulosic products using high-bulk cellulosic fibers | |
| US20020096287A1 (en) | Multi-ply cellulosic products using high-bulk cellulosic fibers | |
| CN103154366A (en) | A paper or paperboard product and a process for production of a paper or paperboard product | |
| US8764939B2 (en) | Method for improving the removal of water | |
| Ashori et al. | Utilization of sugarcane molasses as a dry-strength additive for old corrugated container recycled paper | |
| CN112575618A (en) | Multilayer paperboard | |
| Kasmani et al. | Effect of nano-cellulose on the improvement of the properties of paper newspaper produced from chemi-mechanical pulping | |
| FI94272B (en) | Method of manufacturing a flat, fibrous, flexible, highly tear-resistant substrate and the obtained substrate | |
| US11976420B2 (en) | Reinforced paper for packaging of medical devices | |
| Liang et al. | The use of a PAE/bentonite binary system to improve the wet strength of paper | |
| CN113815290B (en) | Medical packaging paper with high bacterium resistance and preparation method thereof | |
| Braga et al. | Cellulose nanostructured films from pretreated açaí mesocarp fibers: physical, barrier, and tensile performance | |
| CN114901464B (en) | Compostable lid for sealing beverage capsules or beverage powder sachets and capsules and powder sachets sealed therewith | |
| Said Saleh | Modified cellulose synthesized by different deep eutectic solvents as an additive in paper making process | |
| WO2024133774A1 (en) | Cellulose-based 3d-shaped substrate comprising cellulosic fibres and non-fibrous cellulosic material, methods for preparing the same, and uses of the same | |
| WO2024133772A1 (en) | Recyclable cellulose-based substrate comprising cellulosic fibres and non-fibrous cellulosic material | |
| CN105421136B (en) | A kind of papery news media | |
| Lin et al. | The impact of lignin content on paper physical strength of CTMP | |
| BR112021010318A2 (en) | Method for producing holocellulose fibers, use of said fibers, method for producing a strength agent for paper, process for producing paper, paper, use thereof |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220629 Address after: 212132, No. 8 Tung Hing East Road, Dagang, Jiangsu, Zhenjiang Applicant after: Goldeast Paper (Jiangsu) Co.,Ltd. Address before: 215126 No.2 Jinsheng Road, Shengpu Town, Suzhou Industrial Park, Suzhou City, Jiangsu Province Applicant before: GOLD HUASHENG PAPER (SUZHOU INDUSTRIAL PARK) Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |