CN111549554B - High-air-permeability light medical protection special paper and manufacturing method thereof - Google Patents
High-air-permeability light medical protection special paper and manufacturing method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/02—Head boxes of Fourdrinier machines
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- 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
- D21H17/07—Nitrogen-containing compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/64—Alkaline compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
Abstract
The invention discloses a high-permeability light medical protection special paper and a manufacturing method thereof, the method takes special wood fiber, bleached chemical cotton pulp and bleached sulfate softwood chemical pulp as fiber raw materials to prepare, and the product is prepared by homogenizing, screening, seasoning, pulp washing, desanding, sizing, fine screening, net part dehydration forming, squeezing, pre-drying, surface sizing, post-drying, press polishing, reeling and packaging; wherein the weight percentage of each pulp is 45-55 parts of special wood fiber, 15-25 parts of bleached chemical cotton pulp and 25-35 parts of bleached sulfate coniferous wood chemical pulp; the high-air-permeability light medical protection special paper is soft, bulky and air-permeable, overcomes the technical defects of non-sweat permeability, easy allergy and difficult degradation of a chemical fiber non-woven fabric as a base material of a traditional medical protection article, and has the characteristics of environmental protection, bacteria and virus prevention, ventilation and air permeability, sweat absorption and oil absorption, convenience and comfort.
Description
Technical Field
The invention relates to special paper for medical protection, which is a basic raw material of protective articles in the medical health industry and the health industry and belongs to disposable mass consumer goods. In particular to high-air permeability light medical protection special paper and a manufacturing method thereof.
Background
The high-air permeability light medical protection special paper is mainly used for manufacturing disposable medical protection articles, and the protection articles belong to shielding fabrics for medical use and mainly emphasize the barrier property. Barrier properties include the ability to prevent the penetration of liquids and microorganisms. Medical care personnel inevitably contact blood and body fluid of patients in medical care, and the blood and body fluid of the patients can carry various pathogens such as HBV (hepatitis B virus), HCV (hepatitis C virus), HIV (acquired immune deficiency syndrome virus), SARS (coronavirus), SARS-CoV-2 (novel coronavirus) and the like.
With the emphasis on medical safety, the workload and the work risk of medical staff are gradually increased. When a medical staff attends to a patient, necessary medical protective articles are needed in order to protect the staff from infection. The traditional medical protective articles are not protected in place, and the life safety and the body health of medical care personnel cannot be effectively protected. Because the population cardinality in China is large, the number of patients is far larger than that of medical care personnel, and the medical care personnel need to carry out high-intensity work, so that the perspiration, ventilation and safety of the protective clothing are challenged.
Along with the improvement of living standard of people, the demand of people on health is increased day by day, in the fields of medical treatment and health industry and health, the consumption of disposable medical protective articles is huge, once meeting an emergent public health event, the demand is more 'blowout', and the market prospect is wide. The traditional medical protective articles are mainly made of chemical fiber non-woven fabrics, have the technical defects of difficult degradation, no sweat absorption, allergy, lack of comfort and the like, can cause environmental pollution when being used in large quantities, and are flaccid from people to good life. Therefore, the market calls for a new material which is degradable, anti-allergic, easy to absorb sweat and highly breathable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide high-air-permeability light medical protection special paper and a manufacturing method thereof so as to solve the problems in the technical background.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high air permeability light medical protection special paper is made by using plant fiber as raw material and chemical products as auxiliary material; the plant fiber comprises the following raw materials in parts by weight: 25-35 parts of bleached sulfate softwood fiber, 15-25 parts of bleached chemical cotton fiber and 45-55 parts of special wood fiber.
In the technical scheme, the special wood fiber comprises poplar and chemicals; the chemical comprises the following components in percentage by mass relative to the absolute dry weight of the poplar: 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA.
In the technical scheme, the special wood fiber is prepared by adopting a poplar alkaline hydrogen peroxide mechanical treatment process, and the obtained special wood fiber has the following technical indexes: the yield is more than or equal to 90 percent, the bulk is more than or equal to 2.5cm3/g, the whiteness is 75-80 percent, and the ash content is less than or equal to 1.5 percent.
In the technical scheme, the poplar alkaline hydrogen peroxide mechanical treatment process adopted by the special wood fiber comprises the following steps: is prepared by peeling poplar, chipping, screening, washing, tearing, dipping, rubbing, diluting, screening, latency elimination and other processes, and adding chemicals into the processes;
during the tearing process, a single-screw tearing machine is used for tearing the wood chips for the first time, then a double-screw tearing machine is used for tearing the wood chips for the second time and the third time, 1/3 sodium hydroxide and sodium silicate are added during the second tearing process, and the rest 2/3 sodium hydroxide and sodium silicate are added during the third tearing process, so that the fibers are thoroughly split and then impregnated;
in the dipping step, 1/3 of a mixed solution of hydrogen peroxide and EDTA was added to the dipping apparatus and then subjected to grinding;
in the rubbing and grinding process, two sections of high-concentration mills with high efficiency integration are adopted to ensure that the fibers are fully and uniformly bleached and are thoroughly fibrillated, 1/3 of hydrogen peroxide and EDTA mixed solution is added into the first section of high-concentration mill, and the rest 1/3 of hydrogen peroxide and EDTA mixed solution is added into the second section of high-concentration mill;
finally, the special wood fiber is obtained by diluting, screening and latency elimination of the slurry treated by the rubbing process, and the fiber technical parameters of the obtained special wood fiber are as follows: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 28-38 DEG SR, and the wet weight is 1.5-2.5 g.
In the technical scheme, the bleached chemical cotton fiber is prepared by adopting commercial chemical cotton pulp through the working procedures of disintegration, deslagging and pulping, and the following technical parameters are achieved: the concentration is 3.0-4.0%, the beating degree is 30-40 DEG SR, and the wet weight is 5-8 g.
In the technical scheme, the bleached sulfate softwood fiber adopts commercial chemical softwood pulp to achieve the following technical parameters through the procedures of disintegration, slag removal and pulping: the concentration is 3.5-4.5%, the beating degree is 30-40 DEG SR, and the wet weight is 4-6 g.
In the technical scheme, the chemical product comprises 0.3-0.8% of amino polysiloxane (softening agent), 0.3-0.6% of ASA (sizing agent), 0.8-1.2% of PVA (reinforcing agent) and 0.05-0.08% of CPA-209 (bactericide) in terms of absolute dry weight of plant fibers.
In the technical scheme, the high-air permeability light medical protection special paper has the following quality technical indexes: air permeability is not less than
0.5 um/pas, a softness of 100-200 mN, a bulk of not less than 1.5cm3G, tearing strength is more than or equal to 600mN, bursting strength is more than or equal to 200kPa, and water absorption value is 30-50 g/m2。
In the technical scheme, the high-air-permeability light medical protection special paper is used for manufacturing disposable medical protection articles.
A manufacturing method of high-air-permeability light medical protection special paper mainly comprises the following steps:
(1) manufacturing special wood fiber: the special wood fiber is specifically prepared by processing poplar through procedures of peeling, chipping, screening, washing, tearing, dipping, rubbing, diluting, screening, latency elimination and the like, and adding chemicals into the procedures; wherein the chemical comprises 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA (ethylene diamine tetraacetic acid) in terms of absolute dry weight of poplar;
during the tearing process, firstly, a single-screw tearing machine is adopted to tear the wood chips for the first time, and then a double-screw tearing machine is adopted to tear the wood chips for the second time and the third time; wherein 1/3 sodium hydroxide and sodium silicate are added during the second tearing, and the rest 2/3 sodium hydroxide and sodium silicate are added during the third tearing, so that the fiber is thoroughly split and then impregnated;
in the dipping procedure, 1/3 of hydrogen peroxide and EDTA mixed solution is added into a dipping device for full dipping and then the mixture is rubbed and ground;
in the rubbing process, two sections of high-concentration grinding which are integrated efficiently are adopted, so that the fibers are fully and uniformly bleached and are thoroughly refined; wherein 1/3 mixed solution of hydrogen peroxide and EDTA is added in the first-stage high-concentration mill, and the rest 1/3 mixed solution of hydrogen peroxide and EDTA is added in the second-stage high-concentration mill;
finally, the special wood fiber is obtained after the pulp treated by the rubbing process is diluted, screened and latency-eliminated, and the fiber technical parameters of the obtained special wood fiber are as follows: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 28-38 DEG SR, and the wet weight is 1.5-2.5 g;
(2) treating bleached sulfate softwood fiber: the bleached sulfate softwood fiber is obtained by processing commercial chemical softwood pulp through procedures of disintegration, slag removal and pulping, and the technical parameters of the obtained bleached sulfate softwood fiber are as follows: the concentration is 3.5-4.5%, the beating degree is 30-40 DEG SR, and the wet weight is 4-6 g;
(3) treating bleached chemical cotton fiber: the bleached chemical cotton fiber is obtained by adopting commercial chemical cotton pulp through the processes of disintegration, deslagging and pulping, and the technical parameters of the obtained bleached chemical cotton fiber are as follows: the concentration is 3.0-4.0%, the beating degree is 30-40 DEG SR, and the wet weight is 5-8 g;
(4) the process of mixing, homogenizing and preparing the slurry comprises the following steps:
(4-1) pumping the special wood fibers, the bleached sulfate softwood fibers and the bleached chemical cotton fibers obtained in the steps (1) to (3) into a pulp mixing tank for fully mixing, wherein the special wood fibers, the bleached sulfate softwood fibers and the bleached chemical cotton fibers are required to be uniformly mixed;
25-35 parts of bleached sulfate softwood fiber, 15-25 parts of bleached chemical cotton fiber and 45-55 parts of special wood fiber;
(4-2) feeding the slurry mixed in the step (4-1) into a fluffer for homogenizing, so that the following technical parameters are achieved: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 30-40 DEG SR, and the wet weight is 3-5 g;
(4-3) carrying out pH value blending on the homogenized slurry obtained in the step (4-2) in a slurry blending pool, adding PVA, and feeding the slurry into a pre-papermaking pool;
(5) paper making process
(5-1) sending the pulp in the fore-pit into an inlet of a first-stage desanding pump by a sizing pump, carrying out primary white water pulp washing by using an external white water tank, then carrying out secondary white water pulp washing by using the external white water tank (shared with the primary pulp washing) through an inlet of a pulp washing pump after passing through a conical desander, and then entering a head box through a pressure screen; wherein, ASA with 0.3-0.6% of sizing agent is added at the inlet of the fan pump; adding 0.3-0.8% of amino polysiloxane at an inlet of a first-stage sand removal pump;
(5-2) enabling the pulp obtained in the step (5-1) to enter a fourdrinier wire part for forming through a pulp flowing box at the concentration of 0.3-0.6%, dehydrating to 18-22% of dryness, then entering a pressing part, then efficiently dehydrating to 45-50% of dryness in the pressing part by adopting low-linear-pressure high-efficiency dehydration equipment, then entering a front drying part for drying, then after drying in the front drying part, controlling the sizing concentration to 6-10% by using a surface sizing machine according to the condition of paper, finally entering a rear drying part for drying, and using a calender according to the condition of the paper;
(5-3) winding and packaging the paper manufactured in the step (5-1) and the step (5-2) to obtain the high-air-permeability light medical protection special paper, wherein the quality technical indexes of the paper are as follows: the longitudinal breaking length is more than or equal to 5000m, the tearing strength is more than or equal to 600mN, the burst strength is more than or equal to 200kPa, the softness is 100-200 mN, the air permeability is more than or equal to 0.5 um/Pa.s, and the bulk is more than or equal to 1.5cm3A water absorption value of 30 to 50g/m2。
The invention aims to solve the technical defects that the chemical fiber non-woven fabric which is the base material of the existing medical protective product is easy to be allergic, does not absorb sweat and causes static electricity, and the invention takes plant fiber as the main raw material, is nontoxic, harmless, non-allergic and non-irritating to the skin; controlling the water absorption value to be 30-50 g/m2Can ensure to be fixedWater (sweat) absorption properties of; the water content is controlled to be 6-8%, and a static electricity removing eliminator is arranged in the papermaking process to remove static electricity.
In the invention, in order to pursue the high bulk and high air permeability of medical protective articles, 45-55% of special wood fiber is blended, an alkaline hydrogen peroxide hot grinding mechanical treatment process is adopted, the beating degree is 30-40 DEG SR, and the bulk can reach 2.5cm3More than g; 15-25% of chemical cotton pulp, adopting a devillicate brooming process for the pulp, controlling the beating degree to be 30-40 DEG SR after beating degree, adopting low-linear-pressure high-efficiency dehydration equipment for squeezing, and controlling the loose thickness of paper to be 1.5cm3The air permeability is controlled to be more than 0.5 um/Pa.s.
In order to ensure that the material has good strength and is not easy to tear, 15-25 parts of bleached chemical cotton pulp and 25-35 parts of bleached sulfate softwood chemical pulp are used as main raw materials, the pulp treatment is mainly carried out by devillicating broomstick, 0.8-1.2% of PVA is added, and the tearing strength is more than or equal to 600mN and the burst strength is more than or equal to 200 kPa.
In order to improve the softness of paper and ensure that the paper is softer and has good appearance and hand feeling, 15-25 parts of bleached chemical cotton pulp and 25-35 parts of bleached sulfate softwood chemical pulp are used as main raw materials, and 0.3-0.8% of amino polysiloxane is added.
In order to improve the evenness of paper and improve the fineness and the tissue density, anti-bacteria and anti-bacteria performance, the special wood fiber is prepared by adopting an alkaline hydrogen peroxide bleaching and hot grinding mechanical treatment process, 5-6% of sodium hydroxide and 2.5-3.5% of sodium silicate are added, the fiber is softened and made to be soft and exquisite, the beating degree is controlled to be 30-40 DEG SR, and the wet weight is 2-3 g; the pulping concentration of the bleached chemical cotton pulp is 3.5-4.5%, the pulping degree is 30-40 DEG SR, and the wet weight is 6-9 g; the pulping concentration of bleached sulfate softwood pulp is 4-5%, the pulping degree is 30-40 DEG SR, and the wet weight is 5-8 g; the technical indexes of the mixed and homogenized mixture of various plant fibers (special wood fibers, bleached chemical cotton pulp and bleached sulfate softwood pulp) are that the content of fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 30-40 DEG SR, the wet weight is 3-5 g, an upper wire forming device is configured, and the net part of a paper machine is controlled to slowly dehydrate so as to improve the uniformity of paper.
In order to ensure that the paper is natural and pure white, has soft color tone, no carcinogen and no harmful substances, the special wood fiber is bleached by hydrogen peroxide, the whiteness of the pulp is 75-78% ISO, and the treatment process is chlorine-free and sulfur-free; the whiteness of the bleached chemical cotton pulp and the bleached sulfate softwood chemical pulp is 88-90% ISO, no toner is added, and the addition of a fluorescent whitening agent is forbidden.
The main parameters of the product prepared by the invention are quantitative 60-120g/m2In order to ensure the ecological environment protection and the use effect of the paper, the paper is pure white in color, and the whiteness is 75-85% ISO; the longitudinal breaking length is more than or equal to 5000m, the tearing strength is more than or equal to 600mN, the burst strength is more than or equal to 200kPa, the softness is 100-200 mN, the air permeability is more than or equal to 0.5 um/Pa.s, and the bulk is 1.5cm3A water absorption value of 30 to 50g/m2。
Preferably, in order to reduce the use cost of customers, the special wood fibers of 45-55 parts are blended to ensure light weight of the product, so that the product is suitable for large-scale use at one time, and is relatively high in quality and low in price.
Compared with the prior art, the invention has the beneficial effects that:
1. the existing disposable medical protective articles are mainly made of chemical fiber non-woven fabrics as basic raw materials through processing; in order to avoid the technical defects of difficult degradation, no sweat absorption, easy allergy and less comfort of the traditional medical protective articles, the invention adopts plant fiber as a main raw material and is supplemented with chemical articles with special functions, and the medical protective articles are manufactured by a paper machine through special process treatment. The invention provides a novel material of a safe, environment-friendly, breathable and comfortable medical protective article, namely high-breathability light medical protective special paper.
2. The invention aims to overcome the defects that the chemical fiber non-woven fabric which is the base material of the existing medical protective product is difficult to degrade and is not environment-friendly, plant fibers are used as main raw materials, no chemical pulping is used in the production process, no heavy-load pollution source is used in the treatment process, chlorine, sulfur and other chemical elements are not used in the process treatment, the degradation is easy, the energy can be recycled, the weight is light, the consumption of wood raw materials is reduced, and the environment-friendly, low-carbon and ecological effects are achieved.
3. The medical protection special paper provided by the invention is easy to degrade, can be recycled, has the characteristics of environmental protection, bacteria prevention, high air permeability, sweat absorption, comfort and light weight, has the characteristics of light weight and light weight, can reduce the purchasing cost for customers, can save forest resources for China, and embodies the sustainable development concept of green ecology.
The main innovation points of the invention are as follows: 45-55 parts of special wood fiber is adopted, so that the paper is more bulky; in order to improve the evenness and the fineness of paper, the bleached chemical cotton pulp and the bleached sulfate softwood fiber are controlled to be pulped by a conical mill at the concentration of 3.5-4.5% and at the concentration of 4.0-5.0% respectively so as to strengthen the devillicate fibrillation of the fiber; meanwhile, the special wood fiber is softer and finer, and is different from other domestic APMP manufacturers; various pulps are mixed and then are subjected to homogenizing treatment, so that the mixing effect can be enhanced, the pulp quality is improved, and the fiber pulp is proportioned according to the following weight parts: 45-55 parts of special wood fiber, 15-25 parts of bleached chemical cotton pulp and 25-35 parts of bleached sulfate softwood fiber.
Drawings
FIG. 1 is a process flow chart of the high-air permeability light medical protective special paper.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
A high-air permeability light medical protection special paper is made by taking plant fiber as a raw material and chemical products as auxiliary materials; the plant fiber comprises the following raw materials in parts by weight: 25-35 parts of bleached sulfate softwood fiber, 15-25 parts of bleached chemical cotton fiber and 45-55 parts of special wood fiber.
In the invention, the special wood fiber comprises poplar and chemicals, and the chemicals comprise the following components in a absolute dry weight ratio relative to the poplar: 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA. When the hydrogen peroxide is less than or equal to 5.5 percent, the sodium hydroxide is more than or equal to 6 percent, the sodium silicate is more than or equal to 3.5 percent and the EDTA is less than or equal to 0.2 percent, the bulk and the whiteness of the paper pulp are obviously reduced and the strength indexes such as the fracture length, the tearing strength and the like are slightly increased by adjusting according to the dosage trend; and regulating the dosage trend when the hydrogen peroxide is more than or equal to 6.5 percent, the sodium hydroxide is less than or equal to 7 percent, the sodium silicate is less than or equal to 4 percent and the EDTA is more than or equal to 0.3 percent, so that the whiteness of the paper pulp is difficult to improve when reaching 80 percent, the bulk is not obviously increased, and the strength index is obviously reduced.
By adjusting the dosage, the dosage of the hydrogen peroxide has direct influence on the whiteness, the dosage of the EDTA has an auxiliary effect on the whiteness, and the dosages of the sodium hydroxide and the sodium silicate directly influence the strength of the fiber and the bulk of the paper pulp.
In the invention, the special wood fiber is prepared by a poplar alkaline hydrogen peroxide mechanical treatment process, and the obtained special wood fiber has the following technical indexes: the yield is more than or equal to 90 percent, and the bulk is more than or equal to 2.5cm3The whiteness is 75-80%, and the ash content is less than or equal to 1.5%.
The special wood fiber adopts poplar alkaline hydrogen peroxide mechanical treatment process, which comprises the following steps of peeling poplar, chipping, screening, washing, tearing, dipping, rubbing, diluting, screening, latency elimination and the like, and adding chemicals into the poplar to process the poplar into the poplar;
during the tearing process, a single-screw tearing machine is used for tearing the wood chips for the first time, then a double-screw tearing machine is used for tearing the wood chips for the second time and the third time, 1/3 sodium hydroxide and sodium silicate are added during the second tearing process, and the rest 2/3 sodium hydroxide and sodium silicate are added during the third tearing process, so that the fibers are thoroughly split and then impregnated;
in the dipping step, 1/3 of a mixed solution of hydrogen peroxide and EDTA was added to the dipping apparatus and then subjected to grinding;
in the rubbing and grinding process, two sections of high-concentration mills with high efficiency integration are adopted to ensure that the fibers are fully and uniformly bleached and are thoroughly fibrillated, 1/3 of hydrogen peroxide and EDTA mixed solution is added into the first section of high-concentration mill, and the rest 1/3 of hydrogen peroxide and EDTA mixed solution is added into the second section of high-concentration mill;
finally, the special wood fiber is obtained by diluting, screening and latency elimination of the slurry treated by the rubbing process, and the fiber technical parameters of the obtained special wood fiber are as follows: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration (the concentration refers to the concentration of the fibers in the obtained pulp) is 3.5-4.5 percent, the beating degree is 28-38 DEG SR, and the wet weight is 1.5-2.5 g.
In the invention, the bleached chemical cotton fiber is prepared by adopting commercial chemical cotton pulp through the working procedures of disintegration, deslagging and pulping, and the following technical parameters are achieved: the concentration (the concentration refers to the concentration of fibers in the obtained pulp) is 3.0-4.0%, the beating degree is 30-40 DEG SR, and the wet weight is 5-8 g.
In the invention, the bleached sulfate softwood fiber is prepared by carrying out the procedures of disintegration, deslagging and pulping on commercial chemical softwood pulp to achieve the following technical parameters: the concentration (the concentration refers to the concentration of fibers in the obtained pulp) is 3.5-4.5%, the beating degree is 30-40 DEG SR, and the wet weight is 4-6 g.
In the invention, the chemical product comprises 0.3-0.8% of amino polysiloxane (softening agent), 0.3-0.6% of ASA (sizing agent), 0.8-1.2% of PVA (reinforcing agent) and 0.05-0.08% of CPA-209 (bactericide) in terms of absolute dry weight of plant fibers.
In the invention, the high-air permeability light medical protection special paper has the following quality technical indexes: the air permeability is more than or equal to 0.5 um/Pa.s, the softness is 100-200 mN, and the bulk is more than or equal to 1.5cm3G, tearing strength is more than or equal to 600mN, bursting strength is more than or equal to 200kPa, and water absorption value is 30-50 g/m2。
In the invention, the high-air permeability light medical protection special paper is used for manufacturing disposable medical protection articles.
Referring to fig. 1, a method for manufacturing a high-permeability light medical protection special paper mainly comprises the following processes:
(1) manufacturing special wood fiber: the special wood fiber is specifically prepared by sequentially carrying out processes of peeling, chipping, screening, washing, tearing, dipping, rubbing, diluting, screening, latency elimination and the like on poplar, and adding chemicals into the processes for processing; the chemical comprises 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA (ethylene diamine tetraacetic acid) in terms of absolute dry weight of poplar;
during the tearing process, firstly, a single-screw tearing machine is adopted to tear the wood chips for the first time, and then a double-screw tearing machine is adopted to tear the wood chips for the second time and the third time; wherein 1/3 sodium hydroxide and sodium silicate are added during the second tearing, and the rest 2/3 sodium hydroxide and sodium silicate are added during the third tearing, so that the fiber is thoroughly split and then impregnated;
in the dipping procedure, 1/3 of hydrogen peroxide and EDTA mixed solution is added into a dipping device for full dipping (for example, dipping for 5 to 10 minutes), and then the mixture is rubbed and ground;
in the rubbing process, two sections of high-concentration grinding which are integrated efficiently are adopted, so that the fibers are fully and uniformly bleached and are thoroughly refined; wherein 1/3 mixed solution of hydrogen peroxide and EDTA is added in the first-stage high-concentration mill, and the rest 1/3 mixed solution of hydrogen peroxide and EDTA is added in the second-stage high-concentration mill;
finally, the special wood fiber is obtained after the pulp treated by the rubbing process is diluted, screened and latency-eliminated, and the fiber technical parameters of the obtained special wood fiber are as follows: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 28-38 DEG SR, and the wet weight is 1.5-2.5 g;
(2) treating bleached sulfate softwood fiber: the bleached sulfate softwood fiber is obtained by processing commercial chemical softwood pulp through procedures of disintegration, slag removal and pulping, and the technical parameters of the obtained bleached sulfate softwood fiber are as follows: the concentration is 3.5-4.5%, the beating degree is 30-40 DEG SR, and the wet weight is 4-6 g;
(3) treating bleached chemical cotton fiber: the bleached chemical cotton fiber is obtained by adopting commercial chemical cotton pulp through the processes of disintegration, deslagging and pulping, and the technical parameters of the obtained bleached chemical cotton fiber are as follows: the concentration is 3.0-4.0%, the beating degree is 30-40 DEG SR, and the wet weight is 5-8 g;
(4) the process of mixing, homogenizing and preparing the slurry comprises the following steps:
(4-1) pumping the special wood fibers, the bleached sulfate softwood fibers and the bleached chemical cotton fibers obtained in the steps (1) to (3) into a pulp mixing pool for fully mixing; wherein, the bleached sulfate softwood fiber comprises 25-35 parts by weight of bleached sulfate softwood fiber, 15-25 parts by weight of bleached chemical cotton fiber and 45-55 parts by weight of special wood fiber;
(4-2) feeding the slurry mixed in the step (4-1) into a fluffer for homogenizing, so that the following technical parameters are achieved: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 30-40 DEG SR, and the wet weight is 3-5 g;
(4-3) homogenizing the slurry obtained in the step (4-2), blending pH value in a slurry blending pool, adding PVA, and feeding into a pre-papermaking pool;
(5) paper making process
(5-1) sending the slurry of the fore-pit into an inlet of a first-stage desanding pump by a sizing pump, carrying out primary white water flushing by using an external white water tank, then carrying out secondary white water flushing by using the external white water tank (shared with primary flushing) through an inlet of a fan pump after passing through a conical desander, and then entering a head box through a pressure screen; in order to control the appropriate COBB value (30-50 g/m) of the paper2) The invention adopts advanced neutral sizing agent ASA, and the addition point is at the inlet of the fan pump; in order to improve the softness of paper, 0.3-0.8% of amino polysiloxane is added at an inlet of a first-stage sand removal pump;
and (5-2) feeding the pulp obtained in the step (5-1) into a fourdrinier wire part for forming through a pulp flowing box at the concentration of 0.3-0.6%, dehydrating to the dryness of 18-22%, feeding into a squeezing part, specifically, uniformly feeding the pulp into a net through a lip of the pulp flowing box at the concentration of 0.3-0.6%, controlling a water line to be on a net feeding former, and adjusting an inversion box and vacuum parameters of the net feeding former to ensure the uniformity of paper. Further, controlling the high vacuum of the net part to be 0.025-0.035 MPa, adjusting the low vacuum of the vacuum couch roll to be 0.045-0.055 MPa and the high vacuum to be 0.05-0.06 MPa, and fully dehydrating until the dryness is 18-22%;
the squeezing part adopts low linear pressure high efficiency dewatering equipment, and high efficiency dehydration is to dryness factor 45 ~ 50%, avoids reducing paper bulk and air permeability as far as possible. Then, the paper enters a front drying part for drying, after the front drying part is dried, a surface sizing machine is used according to the paper condition, the sizing concentration is controlled to be 6-10%, then the paper enters a rear drying part for drying, and a calender (the use is avoided as much as possible) is used according to the paper condition; further, in order to solve the static problem of the paper in the production process, the following measures are taken: on the premise of ensuring the quality of the medical protection special paper, the water content of the paper is improved as much as possible, and the water content is controlled to be 6-8%; properly reducing the line pressure of the calender; eliminating static electricity by using a static eliminator; the front drying part and the rear drying part need to be controlled to have proper drying curves, and the drying parameters of the front drying part and the rear drying part in the prior art can be specifically referred to prevent the paper from being dried quickly.
(5-3) winding and packaging the paper manufactured in the step (5-1) and the step (5-2) to obtain the high-air-permeability light medical protection special paper, and properly adjusting process parameters according to QCS (quaternary ammonium chloride system) and finished product test indexes to ensure that the quality technical indexes of the high-air-permeability light medical protection special paper are as follows: the longitudinal breaking length is more than or equal to 5000m, the tearing strength is more than or equal to 600mN, the burst strength is more than or equal to 200kPa, the softness is 100-200 mN, the air permeability is more than or equal to 0.5 um/Pa.s, and the bulk is more than or equal to 1.5cm3Water absorption value of 30-50 g/m2。
In order to ensure the normal operation of the system, CPA-209 with a certain amount (such as 0.05-0.08%) is added into containers such as a pulp mixing pool, an external white water tank, a broke pool and the like for sterilization and corrosion prevention.
Example 1
The medical protection special paper obtained in the embodiment adopts the manufacturing method of the high-air-permeability light medical protection special paper provided by the invention, and in the medical protection special paper, the plant fibers comprise the following raw materials in parts by weight: 30 parts of bleached sulfate softwood fiber, 20 parts of bleached chemical cotton fiber and 50 parts of special wood fiber.
The chemical product comprises 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
Example 2
The medical protection special paper obtained in the embodiment adopts the manufacturing method of the high-air-permeability light medical protection special paper provided by the invention, and in the medical protection special paper, the plant fibers comprise the following raw materials in parts by weight: 30 parts of bleached sulfate softwood fiber, 15 parts of bleached chemical cotton fiber and 55 parts of special wood fiber; the chemical product comprises 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
Example 3
The medical protection special paper obtained in the embodiment adopts the manufacturing method of the high-air-permeability light medical protection special paper provided by the invention, and in the medical protection special paper, the plant fibers comprise the following raw materials in parts by weight: 30 parts of bleached sulfate softwood fiber, 25 parts of bleached chemical cotton fiber and 45 parts of special wood fiber; the chemical product comprises 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
Comparative example 1
The medical protection special paper obtained in the embodiment adopts the manufacturing method of the high-air-permeability light medical protection special paper provided by the invention, and in the medical protection special paper, the plant fibers comprise the following raw materials in parts by weight: 30 parts of bleached sulfate softwood fiber, 10 parts of bleached chemical cotton fiber and 60 parts of special wood fiber.
The chemical product comprises 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
Comparative example 2
The medical protection special paper obtained in the embodiment adopts the manufacturing method of the high-air-permeability light medical protection special paper provided by the invention, and in the medical protection special paper, the plant fibers comprise the following raw materials in parts by weight: 30 parts of bleached sulfate softwood fiber, 30 parts of bleached chemical cotton fiber and 40 parts of special wood fiber.
The chemical product comprises 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
Test example 1
The medical special paper for the protective clothing obtained in example 1, example 2, example 3, comparative example 1 and comparative example 2 was subjected to a test performance test, and the statistics of the results are shown in table 1:
TABLE 1 Properties of medical special paper obtained in example 1, example 2, example 3, comparative example 1 and comparative example 2
As can be seen from table 1, the change of the fiber components affects the changes of the main indexes of air permeability, bulk, blood barrier property and virus barrier property of the medical protection special paper, thereby affecting the use performance and use effect of the medical protection special paper, and if the expensive cotton fiber is added, the market competitiveness of the medical protection special paper will be reduced.
Test example 2
Comparing the medical protection special paper provided by the example 1 with the prior art of the rolled toilet paper and the refined kraft paper, the statistical results are shown in the table 2,
TABLE 2 comparison table of medical protection special paper, toilet roll paper and refined kraft paper
| Index name | Unit of | Medical protective paper | Roll toilet paper | Refined kraft paper | Inspection method |
| Breaking length (longitudinal) | km | ≥4.5 | ≤3.0 | ≥4.5 | GB/T12914 |
| Degree of air permeability | um/Pa.s | ≥0.5 | Is not required to | ≥0.3 | GB/T458 |
| Bulk thickness | cm3/g | ≥1.5 | 1.1～1.2 | 1.0～1.2 | QB/T3704 |
| Softness | mN | 100～200 | 100～200 | ≥500 | GB/T8942-2002 |
| Burst strength | kPa | ≥200 | ≤100 | ≥250 | GB/T454 |
| Tearability (longitudinal/horizontal) | mN | ≥600 | ≤100 | ≥600 | GB/T455.2 |
| COBB value | g/m2 | 30～50 | Is not controlled | ≤30 | GB/T1540 |
By comparing the data in table 2, it can be seen that: the medical protection special paper obtained in the embodiment 1 has high air permeability and bulk, embodies the characteristics of high air permeability, light weight and light weight, has the softness comparable to that of roll toilet paper, has no difference with strength (fracture length, bursting strength and tearing strength) of refined kraft paper, has certain water (sweat) absorption performance, and has good service performance.
Test example 3
The medical protective paper provided in example 1 was compared with the conventional chemical fiber nonwoven fabric used for medical protective articles, and the statistical results are shown in table 3:
TABLE 3 comparison table of the properties of the medical protective paper and the chemical fiber nonwoven fabrics used in the traditional medical protective articles
| Index name | Unit of | Medical protection special paper | Chemical fiber non-woven fabric | Inspection method |
| Quantification of | g/m2 | 60～120 | 35～45 | |
| Breaking length (longitudinal) | km | ≥4.5 | ≤3.0 | GB/T12914 |
| Degree of air permeability | um/Pa.s | ≥0.5 | ≥0.5 | GB/T458 |
| Bulk thickness | cm3/g | ≥1.5 | Is not required to | QB/T3704 |
| Softness | mN | 100～200 | ≥200 | GB/T8942-20 |
| Burst strength | kPa | ≥200 | ≤100 | GB/T454 |
| Tearability (longitudinal/horizontal) | mN | ≥600 | ≤400 | GB/T455.2 |
| COBB value | g/m2 | 30～50 | ≤10 | GB/T1540 |
As can be seen from table 3, the medical protection special paper overcomes the disadvantages of difficult water (sweat) absorption and poor strength of the chemical fiber nonwoven fabric while maintaining the advantages of the chemical fiber nonwoven fabric.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A manufacturing method of high-air-permeability light medical protection special paper is characterized by comprising the following steps:
(1) manufacturing special wood fiber: the special wood fiber is specifically prepared by sequentially carrying out peeling, chipping, screening, washing, tearing, dipping, rubbing, diluting, screening and latency elimination on poplar, and adding chemicals into the processes to process the poplar; wherein the chemical comprises 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA (ethylene diamine tetraacetic acid) in terms of absolute dry weight of poplar;
during the tearing process, firstly, a single-screw tearing machine is adopted to tear the wood chips for the first time, and then a double-screw tearing machine is adopted to tear the wood chips for the second time and the third time; wherein 1/3 sodium hydroxide and sodium silicate are added during the second tearing, and the rest 2/3 sodium hydroxide and sodium silicate are added during the third tearing, so that the fiber is thoroughly split and then impregnated;
in the dipping procedure, 1/3 of hydrogen peroxide and EDTA mixed solution is added into a dipping device for full dipping and then the mixture is rubbed and ground;
in the rubbing process, two sections of high-concentration grinding which are integrated efficiently are adopted, so that the fibers are fully and uniformly bleached and are thoroughly refined; wherein 1/3 mixed solution of hydrogen peroxide and EDTA is added in the first-stage high-concentration mill, and the rest 1/3 mixed solution of hydrogen peroxide and EDTA is added in the second-stage high-concentration mill;
finally, the special wood fiber is obtained after the pulp treated by the rubbing process is diluted, screened and latency-eliminated, and the fiber technical parameters of the obtained special wood fiber are as follows: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 28-38 DEG SR, and the wet weight is 1.5-2.5 g;
(2) treating bleached sulfate softwood fiber: the bleached sulfate softwood fiber is obtained by processing commercial chemical softwood pulp through procedures of disintegration, slag removal and pulping, and the technical parameters of the obtained bleached sulfate softwood fiber are as follows: the concentration is 3.5-4.5%, the beating degree is 30-40 DEG SR, and the wet weight is 4-6 g;
(3) treating bleached chemical cotton fiber: the bleached chemical cotton fiber is obtained by adopting commercial chemical cotton pulp through the processes of disintegration, deslagging and pulping, and the technical parameters of the obtained bleached chemical cotton fiber are as follows: the concentration is 3.0-4.0%, the beating degree is 30-40 DEG SR, and the wet weight is 5-8 g;
(4) mixing, homogenizing and preparing slurry, which specifically comprises the following steps:
(4-1) pumping the special wood fibers, the bleached sulfate softwood fibers and the bleached chemical cotton fibers obtained in the steps (1) to (3) into a pulp mixing tank for fully mixing, wherein the bleached sulfate softwood fibers comprise 25-35 parts by weight of bleached sulfate softwood fibers, 15-25 parts by weight of bleached chemical cotton fibers and 45-55 parts by weight of special wood fibers;
(4-2) feeding the slurry mixed in the step (4-1) into a fluffer for homogenizing, so that the following technical parameters are achieved: the content of the fiber bundles is less than or equal to 0.5 percent, the concentration is 3.5-4.5 percent, the beating degree is 30-40 DEG SR, and the wet weight is 3-5 g;
(4-3) carrying out pH value blending on the homogenized slurry obtained in the step (4-2) in a slurry blending pool, adding PVA, and feeding the slurry into a pre-papermaking pool;
(5) paper making
(5-1) sending the slurry of the fore-pit into an inlet of a first-stage desanding pump by a sizing pump, carrying out primary white water flushing by using an external white water tank, then carrying out secondary white water flushing by using the external white water tank at the inlet of a sluicing pump after passing through a conical desander, and then entering a head box through a pressure screen; wherein 0.3-0.6% of sizing agent ASA is added at the inlet of the fan pump; adding 0.3-0.8% of amino polysiloxane at an inlet of a first-stage sand removal pump;
(5-2) enabling the pulp obtained in the step (5-1) to enter a fourdrinier wire part for forming through a pulp flowing box at the concentration of 0.3-0.6%, dehydrating to 18-22% of dryness, then entering a pressing part, then efficiently dehydrating to 45-50% of dryness in the pressing part by adopting low-linear-pressure high-efficiency dehydration equipment, then entering a front drying part for drying, then after drying in the front drying part, controlling the sizing concentration to 6-10% by using a surface sizing machine according to the condition of paper, finally entering a rear drying part for drying, and using a calender according to the condition of the paper;
(5-3) winding and packaging the paper manufactured in the step (5-1) and the step (5-2), namely the high-air-permeability light medical protection special paper, wherein the quality technical indexes of the paper are as follows: the longitudinal breaking length is more than or equal to 5000m, the tearing strength is more than or equal to 600mN, the burst strength is more than or equal to 200kPa, the softness is 100-200 mN, the air permeability is more than or equal to 0.5 um/Pa.s, and the bulk is more than or equal to 1.5cm3A water absorption value of 30 to 50g/m2。
2. The high-air-permeability light medical protection special paper prepared by the method of claim 1 is characterized in that the paper is made from plant fibers as a raw material and chemical products as auxiliary materials; the plant fiber comprises the following raw materials in parts by weight: 25-35 parts of bleached sulfate softwood fiber, 15-25 parts of bleached chemical cotton fiber and 45-55 parts of special wood fiber; the special wood fiber comprises poplar and chemicals; the chemical comprises the following components in percentage by mass relative to the absolute dry weight of the poplar: 5-6% of sodium hydroxide, 2.5-3.5% of sodium silicate, 5.5-6.5% of hydrogen peroxide and 0.2-0.3% of EDTA.
3. The high-permeability light medical protection special paper as claimed in claim 2, wherein the special wood fiber is prepared by a poplar alkaline hydrogen peroxide mechanical treatment process, and the obtained special wood fiber has the following technical indexes: the yield is more than or equal to 90 percent, and the bulk is more than or equal to 2.5cm3The whiteness is 75-80%, and the ash content is less than or equal to 1.5%.
4. The high-air-permeability light medical protection special paper as claimed in claim 2, wherein the chemical products comprise 0.3-0.8% of amino polysiloxane, 0.3-0.6% of ASA, 0.8-1.2% of PVA and 0.08% of CPA-2090.05 by absolute dry weight of plant fibers.
5. The high-permeability light medical protection special paper as claimed in claim 4, wherein the quality technical indexes of the high-permeability light medical protection special paper are as follows: the air permeability is more than or equal to 0.5 um/Pa.s, the softness is 100-200 mN, and the bulk is more than or equal to 1.5cm3G, tearing strength is more than or equal to 600mN, bursting strength is more than or equal to 200kPa, and water absorption value is 30-50 g/m2。
6. The high-air-permeability light medical protection special paper as claimed in any one of claims 2 to 5, wherein the high-air-permeability light medical protection special paper is used for manufacturing disposable medical protection articles.
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