CN114808525A - Soft, easily degradable and flushable plant fiber facial cleansing towel and preparation method and application thereof - Google Patents
Soft, easily degradable and flushable plant fiber facial cleansing towel and preparation method and application thereof Download PDFInfo
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- CN114808525A CN114808525A CN202210579656.8A CN202210579656A CN114808525A CN 114808525 A CN114808525 A CN 114808525A CN 202210579656 A CN202210579656 A CN 202210579656A CN 114808525 A CN114808525 A CN 114808525A
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- 238000004140 cleaning Methods 0.000 claims abstract description 66
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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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/16—Paper towels; Toilet paper; Holders therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
-
- 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
- D21F5/18—Drying webs by hot air
- D21F5/181—Drying webs by hot air on Yankee cylinder
-
- 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
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
Abstract
The invention relates to a soft, easily degradable and flushable plant fiber facial cleaning towel and a preparation method and application thereof. The method comprises the following steps: diluting bleached hardwood pulp, pulping, and pulping to obtain short fiber pulp with the beating degree of 18-20 DEG SR; mixing and diluting bleached softwood pulp and bleached hardwood pulp, and then pulping and grinding to obtain long-fiber pulp with the beating degree of 22-24 DEG SR; mixing the short fiber pulp and the long fiber pulp, adding 10-25 wt% of regenerated cellulose fiber, a softening agent and a wet strength agent, preparing the mixed pulp into a wet paper web, performing extrusion dehydration, spunlace reinforcement treatment, press dehydration, hot air through drying and scraper wrinkling on the wet paper web to obtain base paper, and finally spraying a care cleaning solution on the surface of the base paper to obtain the plant fiber facial cleaning towel. The plant fiber facial cleaning towel prepared by the invention has good wet strength, water absorption performance, tensile property and dispersibility.
Description
Technical Field
The invention relates to the field of household paper, in particular to a soft, easily degradable and dispersible plant fiber facial cleaning towel and a preparation method and application thereof.
Background
The facial cleaning towel is a new product in the markets at home and abroad in recent years, the problem that the knitted towel is difficult to dry and sterilize and the common toilet paper cannot be reused due to insufficient wet strength is solved, and the dual requirements of consumers on the portability and the cleaning capability of the household paper are basically met.
The non-woven fabric facial cleaning towel products sold in the market at present are mainly prepared by reinforcing natural cellulose fibers such as cotton fibers and fibrilia or regenerated cellulose fibers such as viscose fibers, lyocell fibers, polylactic acid fibers and cellulose acetate fibers through mechanical web formation or air web formation and a spunlace method. The non-woven fabric facial cleaning towel is mature in manufacturing process, but still has the problems of general water absorption, poor comfort, easiness in slag falling and hair falling and the like. Meanwhile, with the continuous advancement of national environmental protection and the continuous improvement of environmental awareness of consumers, people pay more attention to the post-treatment problem of disposable products such as non-woven fabrics.
The prior non-woven fabric facial cleaning towel product has poor flushability and degradability and is difficult to be dispersed and naturally degraded in a sewer. With the hot sale of non-woven fabric products, a new white pollution problem is easily caused when the product treatment mode after use is improper. The paper pulp fiber has wide raw material source, low cost, market price of about 30 percent of that of viscose fiber, easy dispersion and degradation of finished paper and good hydrophilicity, and is an excellent raw material for replacing non-woven fabrics. However, the entanglement among fibers is not enough after the paper pulp raw material is formed into paper, and the hydrogen bonding is not strong.
The spunlace method is the most widely used fiber web reinforcement process in the production process of the non-woven fabric at present, the high-pressure water needles puncture the fiber web and cause fiber movement and displacement, and then fibers are rearranged and intertwined with each other, and finally the mechanical strength of the fiber web is improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a preparation method of a soft, easily degradable and dispersible plant fiber facial cleaning towel.
The invention also aims to provide the soft easily-degradable flushable plant fiber facial cleaning towel prepared by the method.
The invention further aims to provide application of the soft easily-degradable flushable plant fiber facial cleaning towel.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a soft, easily degradable and dispersible plant fiber facial cleaning towel comprises the following steps:
(1) pulping by short fiber pulping: diluting and pulping bleached hardwood pulp, and then performing pulping treatment to brooming the bleached hardwood pulp to obtain short fiber pulp with the beating degree of 18-20 DEG SR;
(2) pulping the long fiber crushed pulp: mixing bleached softwood pulp and bleached hardwood pulp, diluting and pulping, and then performing pulping treatment to perform fibrillation to obtain long fiber pulp with the beating degree of 22-24 DEG SR;
(3) slurry preparation: mixing the short fiber slurry and the long fiber slurry according to the mass ratio of 1:1 to obtain mixed slurry I; then adding regenerated cellulose fibers accounting for 10-25% of the total mass of the mixed slurry I, and adding a softening agent to obtain mixed slurry II; slightly pulping the mixed pulp II until the beating degree is 24-26 DEG SR (the beating degree is higher than that of the long fiber pulp), so as to obtain mixed pulp III; adding a wet strength agent into the mixed slurry III, uniformly stirring, and screening slurry through a pressure screen to obtain mixed slurry IV;
(4) preparing base paper: forming a uniform mixed fiber web from the mixed slurry IV in a paper pulp former, carrying out slight extrusion dehydration on the mixed fiber web, carrying out spunlace reinforcement treatment, carrying out extrusion dehydration, and carrying out through-air drying to obtain a paper web with a solid content of 73-75%; continuously drying the paper web through a yankee dryer until the solid content is 92-94% to obtain a dried paper web; wrinkling the dried paper web by a scraper to obtain base paper; the spunlace reinforcement treatment is 3-8 spunlace reinforcement treatments, the acting distance of a water needle is 12-16 mm, the water pressure of the spunlace treatment is increased and then reduced, and the water pressure range is 4-10 MPa;
(5) double-sided spraying: spraying a nursing cleaning solution on one side or two sides of the base paper, and drying to obtain a soft easily degradable flushable plant fiber facial cleaning towel; wherein the nursing cleaning solution is at least one of glycerol, betaine, sodium hyaluronate, witch hazel extract, aloe extract and salvia miltiorrhiza extract.
The bleached hardwood pulp in the steps (1) and (2) is bleached hardwood pulp of different plant fiber sources, including but not limited to at least one of bleached poplar pulp, bleached eucalyptus pulp and bleached acacia pulp; preferably, the blended bleached hardwood pulp consists of 30-60 wt% of bleached poplar pulp fibers, 20-30 wt% of bleached eucalyptus pulp fibers and 20-30 wt% of bleached acacia wood pulp fibers; more preferably a blended bleached hardwood pulp consisting of 40 wt% bleached poplar pulp fibers, 20 wt% bleached eucalyptus pulp fibers and 20 wt% bleached acacia wood pulp fibers.
The pulping in the steps (1) and (2) is carried out by adopting a pulper.
The concentration of the slurry in the pulping in the steps (1) and (2) is 4-6 wt%; preferably 5 wt%.
The time for pulping in the steps (1) and (2) is 8-12 min; preferably 10 min.
The refining treatment in the steps (1) and (2) is implemented by adopting a conical refiner.
The beating degree of the short fiber slurry in the step (1) is preferably 18 DEG SR.
The bleached softwood pulp in the step (2) is pulp of different plant fiber sources, and the pulp comprises, but is not limited to, Chinese red pine pulp, larch pulp and the like.
The mass ratio of the bleached softwood pulp to the bleached hardwood pulp in the step (2) is 6-8: 2-4 (calculated by 100 percent of the total weight, containing 60-80 wt percent of bleached softwood fiber and 20-40 wt percent of bleached hardwood pulp fiber); preferably 6: 4.
The beating degree of the long fiber slurry in the step (2) is 22 DEG SR.
The addition amount of the regenerated cellulose fibers in the step (3) is preferably 15-20% of the total mass of the mixed slurry I.
The softening agent in the step (3) is an ester quaternary ammonium salt softening agent; preferably REWOQUAT WE45VEG triethanolamine esterquat softener.
The addition amount of the softening agent in the step (3) is 0.08-0.1% of the mass of the base paper (based on the weight of the dried paper web); preferably 0.1% by mass of the base paper (based on the weight of the web after drying).
And (4) slightly pulping in the step (3) by adopting a vertical refiner.
The wet strength agent in the step (3) is polyamide polyamine epichlorohydrin resin (PAE resin).
The adding amount of the wet strength agent in the step (3) is 0.3-1.0% of the mass of the base paper (based on the weight of the dried paper web); preferably 0.5% by mass of the base paper (based on the weight of the web after drying).
The pulp former in step (4) includes, but is not limited to, a slant wire former, a cylinder former, a fourdrinier former, and the like.
The basis weight of the paper obtained by the paper pulp forming (mixed fiber net) in the step (4) is 10-80 g/m 2 (ii) a Preferably 50g/m 2 。
The spunlace reinforcement treatment in the step (4) is preferably 6 spunlace reinforcement treatments; wherein the acting distance of the water jet is 16mm, and the water pressure for spunlacing reinforcement is 4MPa, 5-6 MPa, 6-8 MPa, 5-6 MPa and 4MPa respectively.
The temperature of the hot air through drying in the step (4) is 400-450 ℃; preferably 450 deg.c.
The creping conditions of the scraper in the step (4) are as follows: the angle of the wrinkling scraper is 75-90 degrees, the wrinkling speed ratio is 1.2-1.3, and the wrinkling rate is 25-75 percent; preferably: the creping doctor angle was 75 °, the creping speed ratio was 1.2 and the creping rate was 50%.
The nursing cleaning solution in the step (5) preferably comprises the following components in percentage by weight: 0.05-0.1% of glycerin, 0.1-0.2% of betaine, 0.01-0.05% of sodium hyaluronate, 0.01-0.05% of witch hazel extract, 0.01-0.05% of aloe extract, 0.01-0.03% of salvia miltiorrhiza extract and the balance of water.
The nursing cleaning solution in the step (5) further preferably comprises the following components in percentage by weight: 0.1% of glycerin, 0.2% of betaine, 0.05% of sodium hyaluronate, 0.05% of witch hazel extract, 0.05% of aloe extract, 0.03% of salvia miltiorrhiza extract and the balance of water.
The spraying in the step (5) is carried out by adopting spraying equipment; preferably, the spraying is carried out using a disk-type centrifugal spraying device.
The single-side spraying amount of the nursing cleaning solution in the step (5) is preferably 4-6 g/m 2 (ii) a More preferably 5g/m 2 。
And (5) drying by adopting cold air for quick drying.
A soft, easily degradable and flushable plant fiber facial cleaning towel is prepared by any one of the methods.
The soft, easily degradable and dispersible plant fiber facial cleaning towel is applied to the aspect of preparing paper for daily use.
Compared with the prior art, the invention has the following advantages and effects:
(1) according to the invention, the long and short fiber paper pulps with different proportions are respectively pulped and pulped, then the mixed paper pulps are slightly pulped by a refiner, the mixed paper pulps are subjected to a plurality of spunlace reinforcement treatments after forming a forming net, and are subjected to wrinkling and curling by a scraper after dehydration and drying, and then the double-sided spraying of the care essence is carried out, so that the prepared environment-friendly degradable clean facial tissue has good wet strength, water absorption performance and tensile property, and is soft, hygroscopic and not easy to break.
(2) The green degradable plant fiber facial cleaning towel prepared by the invention is breathable, soft, convenient to carry and excellent in water absorption during use, and has cleaning and moisturizing essence without being matched with other cleaning products.
(3) The raw materials used by the green degradable plant fiber facial cleaning towel prepared by the invention can be biodegraded, and the green degradable plant fiber facial cleaning towel has good dispersibility, and can be rapidly disintegrated under the action of the shearing force of water flow only by being discarded in a toilet when the use is finished, and can smoothly pass through a closestool, an urban drainage pipeline and a sewage transmission system, so that the pollution to the environment is effectively reduced.
(4) The invention adopts the hot air penetrating drying technology to improve the bulkiness and the water absorption of the paper sheet, and the hot air penetrating drying is adopted to force hot air to pass through the paper web, so that the facial cleaning tissue has higher bulk and softness, and the paper sheet fiber has better durability and water absorption.
(5) The invention combines the traditional paper making method with the non-woven fabric spunlace method, and adds a small part of regenerated cellulose fiber with longer fiber to provide a supporting framework so as to improve the strength of the finished paper.
(6) The nursing cleaning solution disclosed by the invention contains a mixed solution of glycerol, betaine, sodium hyaluronate, a witch hazel extract, an aloe extract, a salvia miltiorrhiza extract and pure water, and has the effects of sterilizing, diminishing inflammation, beautifying and moisturizing.
Drawings
Fig. 1 is an SEM image of the soft, easily degradable, flushable vegetable fiber facial cleanser made in example 1.
FIG. 2 is a graph of flushability test results; wherein (a) is the plant fiber facial cleaning towel prepared in example 1; (b) the regenerated cellulose facial tissue (c) is 100 percent of soybean protein fiber facial tissue.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto. 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 invention. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated. The test methods in the following examples, in which specific experimental conditions are not specified, are generally performed according to conventional experimental conditions or according to the experimental conditions recommended by the manufacturer.
The bleached poplar pulp fiber, the bleached eucalyptus pulp fiber, the bleached acacia wood pulp fiber, the bleached softwood pulp fiber and the regenerated cellulose fiber related to the examples and the comparative examples of the present invention were purchased from Shandong Sun paper industry, Inc.; the polyamide polyamine epichlorohydrin resin (PAE resin) is available from plastic materials Co., Ltd, Dongguan.
The sodium hyaluronate, betaine, glycerin and aloe extract referred to in the examples and comparative examples of the present invention were purchased from Shanghai Michelin Co., Ltd; the hamamelis extract and the salvia miltiorrhiza extract are purchased from Sendy Biotech limited, Shenzhen.
The esterquat softener involved in the examples and comparative examples of the present invention was REWOQUAT WE45VEG triethanolamine esterquat softener available from Shanghai Brilliant chemical Co., Ltd.
Example 1
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper (SL-L1, Shandong gold duplex environmental protection equipment Co., Ltd.) to be diluted to 5 wt% and pulped for 10min, and then devillicate brooming by a cone refiner (xrd-1254, Shandong Asahi Ridong machinery Co., Ltd.) until the degree of beating is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 80 wt% of bleached softwood pulp fibers and 20 wt% of bleached hardwood pulp fibers, wherein the bleached hardwood pulp fibers contain 60 wt% of bleached poplar pulp fibers, 20 wt% of bleached eucalyptus pulp fibers and 20 wt% of bleached acacia wood pulp fibers) into a D-type hydrapulper (SL-L1, Shandong gold duplex environmental protection equipment Co., Ltd.) to be diluted to 5 wt% and pulped for 10min, and then devillicate-fibrillating the bleached mixed wood pulp by a cone refiner (xrd-1254 Shandong Asahi Ridong mechanical Co., Ltd.) until the beating degree is 24 DEG SR;
(3) preparing long and short fiber pulp: pumping the long and short fiber pulp into a pulp mixing pool according to the absolute dry mass ratio of 1:1, and uniformly mixing to obtain mixed pulp I; then adding 20 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing to obtain mixed pulp II;
(4) fine pulp treatment: slightly pulping the mixed slurry II by using a vertical refiner (BHHB-11, Shandong Bohui environmental protection engineering Co., Ltd.) until the pulping degree is 26 DEG SR to obtain mixed slurry III;
(5) screening pulp: pumping the mixed slurry III to a slurry forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the weight of the mixed slurry III relative to the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and then screening the slurry through a pressure screen (the slurry inlet pressure is 0.15mPa) to obtain mixed slurry IV;
(6) pulp forming: the mixed slurry IV is passed through a pulp distributor to form a uniform mixed fiber web with a basis weight of 50g/m in a pulp former 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 6MPa, 8MPa, 6MPa and 4 MPa;
(8) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through-drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(9) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: the paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device (HS-1, Haisen environmental protection science and technology Limited company in Guangzhou city) to carry out double-sided spraying of the nursing cleaning solution on the paper web, wherein the spraying amount is 5g/m of single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(11) coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use. The SEM image of the plant fiber facial tissue is shown in fig. 1.
Example 2
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 50 wt% of bleached poplar pulp fiber, 25 wt% of bleached eucalyptus pulp fiber and 25 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming by a conical refiner until the beating degree is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 70 wt% of bleached softwood pulp fiber and 30 wt% of bleached hardwood pulp fiber, wherein the bleached hardwood pulp fiber contains 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicate and fibrillating by a conical refiner until the pulping degree is 23 DEG SR;
(3) preparing long and short fiber pulp: pumping the long and short fiber slurry into a slurry preparation pool according to the mass ratio of 1:1, and uniformly mixing to obtain mixed slurry I; then adding 15 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing to obtain mixed pulp II;
(4) fine pulp treatment: slightly pulping the mixed pulp II by using a vertical refiner until the pulping degree is 25 DEG SR to obtain mixed pulp III;
(5) screening pulp: pumping the mixed slurry III to a slurry forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the weight of the mixed slurry III relative to the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and then screening the slurry through a pressure screen (the slurry inlet pressure is 0.15mPa) to obtain mixed slurry IV;
(6) pulp forming: the mixed slurry IV is passed through a pulp distributor to form a uniform mixed fiber web with a basis weight of 50g/m in a pulp former 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 5MPa, 7MPa, 5MPa and 4 MPa;
(8) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(9) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided nursing cleaning solution spraying on the paper web, and the spraying amount is 5g/m of single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(11) coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Example 3
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 40 wt% of bleached poplar pulp fiber, 30 wt% of bleached eucalyptus pulp fiber and 30 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming by a conical refiner until the beating degree is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 60 wt% of bleached softwood pulp fiber and 40 wt% of bleached hardwood pulp fiber, wherein the bleached hardwood pulp fiber contains 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and fibrillating by a conical refiner until the pulping degree is 22 DEG SR;
(3) preparing long and short fiber pulp: pumping the long and short fiber slurry into a slurry preparation pool according to the mass ratio of 1:1, and uniformly mixing to obtain mixed slurry I; then adding 15 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing to obtain mixed pulp II;
(4) fine pulp treatment: slightly pulping the mixed pulp II by using a vertical refiner until the pulping degree is 24-degree SR to obtain mixed pulp III;
(5) screening pulp: pumping the mixed slurry III to a slurry forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the weight of the mixed slurry III relative to the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and then screening the slurry through a pressure screen (the slurry inlet pressure is 0.15mPa) to obtain mixed slurry IV;
(6) pulp forming: the mixed slurry IV is passed through a pulp distributor to form a uniform mixed fiber web with a basis weight of 50g/m in a pulp former 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 5MPa, 6MPa, 5MPa and 4 MPa;
(8) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(9) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided cleaning solution spraying on the paper web, and the spraying amount is 5g/m per single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(11) coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Comparative example 1
(1) Pulping: putting the mixed pulp (containing 30 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber, 20 wt% of bleached acacia wood fiber and 30 wt% of bleached softwood pulp) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming through a conical refiner until the beating degree is 22 DEG SR;
(2) slurry preparation: pumping the mixed slurry into a slurry preparation tank, adding 15 wt% of regenerated cellulose fiber compared with the mixed slurry and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (7)) and uniformly mixing;
(3) screening pulp: pumping the uniformly mixed pulp obtained in the step (2) to a pulp forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the paper forming (namely the paper web dried in the step (7)), uniformly stirring, and screening pulp by a pressure screen (pulp inlet pressure is 0.15 mPa);
(4) fine pulp treatment: slightly pulping the mixed pulp obtained in the step (3) by using a vertical refiner until the beating degree is 24 degrees SR;
(5) pulp forming: forming a uniform mixed fiber net in the pulp former by the pulp obtained in the step (4) through a pulp distributor, and fixingThe amount is 50g/m 2 ；
(6) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 5MPa, 6MPa, 5MPa and 4 MPa;
(7) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(8) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(9) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided nursing cleaning solution spraying on the paper web, and the spraying amount is 5g/m of single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(10) coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Comparative example 2
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 40 wt% of bleached poplar pulp fiber, 30 wt% of bleached eucalyptus pulp fiber and 30 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming by a conical refiner until the beating degree is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 60 wt% of bleached softwood pulp fiber and 40 wt% of bleached hardwood pulp fiber, wherein the bleached hardwood pulp fiber contains 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicate and fibrillating by a conical refiner until the beating degree is 22 DEG SR;
(3) slurry preparation: pumping the long and short fiber pulp into a pulp mixing tank according to the mass ratio of 1:1, uniformly mixing, adding 5 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing;
(4) screening pulp: pumping the uniformly mixed pulp obtained in the step (3) to a pulp forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and screening pulp by a pressure screen (pulp inlet pressure is 0.15 mPa);
(5) fine pulp treatment: slightly pulping the mixed pulp obtained in the step (4) by using a vertical refiner until the beating degree is 24 degrees SR;
(6) pulp forming: forming the slurry obtained in the step (5) into a uniform mixed fiber web in a pulp former through a pulp distributor, wherein the quantitative amount is 50g/m 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 5MPa, 6MPa, 5MPa and 4 MPa;
(8) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(9) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided cleaning solution spraying on the paper web, and the spraying amount is 5g/m per single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100 percent)％)；
(11) Coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Comparative example 3
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 40 wt% of bleached poplar pulp fiber, 30 wt% of bleached eucalyptus pulp fiber and 30 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming by a conical refiner until the beating degree is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 60 wt% of bleached softwood pulp fiber and 40 wt% of bleached hardwood pulp fiber, wherein the bleached hardwood pulp fiber contains 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicate and fibrillating by a conical refiner until the beating degree is 22 DEG SR;
(3) preparing long and short fiber pulp: pumping the long and short fiber pulp into a pulp mixing pool according to the mass ratio of 1:1, adding 15 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing;
(4) screening pulp: pumping the uniformly mixed pulp obtained in the step (3) to a pulp forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and screening pulp by a pressure screen (pulp inlet pressure is 0.15 mPa);
(5) fine pulp treatment: slightly pulping the mixed pulp obtained in the step (4) by using a vertical refiner until the beating degree is 24 degrees SR;
(6) pulp forming: forming the slurry obtained in the step (5) into a uniform mixed fiber web in a pulp former through a pulp distributor, wherein the quantitative amount is 50g/m 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is 1MPa, 2MPa, 3MPa, 2MPa and 1MPa respectively;
(8) vacuum dehydration treatment: carrying out vacuum dehydration on the mixed fiber web, and then carrying out hot air through drying at 450 ℃ to obtain a dry paper web, wherein the solid content of the paper web is controlled to be 73-75%;
(9) wrinkling and coiling: continuously drying the dried paper web by a yankee dryer until the solid content is 92-94%, then wrinkling by a 75-degree scraper, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided nursing cleaning solution spraying on the paper web, and the spraying amount is 5g/m of single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(11) coiling for standby: and (3) quickly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Comparative example 4
(1) Pulping by short fiber pulping: putting bleached hardwood pulp (containing 40 wt% of bleached poplar pulp fiber, 30 wt% of bleached eucalyptus pulp fiber and 30 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicating and brooming by a conical refiner until the beating degree is 18 DEG SR;
(2) pulping the long fiber crushed pulp: putting bleached mixed wood pulp (containing 60 wt% of bleached softwood pulp fiber and 40 wt% of bleached hardwood pulp fiber, wherein the bleached hardwood pulp fiber contains 60 wt% of bleached poplar pulp fiber, 20 wt% of bleached eucalyptus pulp fiber and 20 wt% of bleached acacia wood pulp fiber) into a D-type hydrapulper, diluting to 5 wt% and pulping for 10min, and then devillicate and fibrillating by a conical refiner until the beating degree is 22 DEG SR;
(3) preparing long and short fiber pulp: pumping the long and short fiber pulp into a pulp mixing pool according to the mass ratio of 1:1, adding 15 wt% of regenerated cellulose fiber compared with the mixed pulp and 0.1 wt% of ester quaternary ammonium salt softening agent relative to finished paper (namely the paper web dried in the step (8)) and uniformly mixing;
(4) screening pulp: pumping the uniformly mixed pulp obtained in the step (3) to a pulp forming pool, adding polyamide polyamine epichlorohydrin resin (PAE resin) which is 0.5 wt% of the paper forming (namely the paper web dried in the step (8)), uniformly stirring, and screening pulp by a pressure screen (pulp inlet pressure is 0.15 mPa);
(5) fine pulp treatment: slightly pulping the mixed pulp obtained in the step (4) by using a vertical refiner until the beating degree is 24 degrees SR;
(6) pulp forming: forming the slurry obtained in the step (5) into a uniform mixed fiber web in a pulp former through a pulp distributor, wherein the quantitative amount is 50g/m 2 ；
(7) And (3) spunlace reinforcement treatment: carrying out 6 times of spunlace reinforcement treatment after the mixed fiber web is subjected to mild extrusion dehydration, wherein the action distance of a water needle is 16mm, and the water pressure of spunlace reinforcement is respectively 4MPa, 5MPa, 6MPa, 5MPa and 4 MPa;
(8) squeezing and drying: carrying out multi-group drying by a drying cylinder after squeezing and dewatering the mixed fiber web, wherein the drying temperature is 160 ℃, and the solid content of the paper web is controlled to be 92-94%;
(9) wrinkling and coiling: wrinkling the dried paper web by a 75-degree scraper of a drying cylinder, wherein the wrinkling speed ratio is 1.2, the wrinkling rate is 50%, and winding the wrinkled paper web to a paper roll for later use;
(10) double-sided spraying: paper web on the paper roll is conveyed to pass through a disc type centrifugal spraying device to carry out double-sided nursing cleaning solution spraying on the paper web, and the spraying amount is 5g/m of single side 2 (ii) a Wherein the nursing cleaning solution is a mixed solution of glycerol (0.1 wt%), betaine (0.2 wt%), sodium hyaluronate (0.05 wt%), witch hazel extract (0.05 wt%), aloe extract (0.05 wt%), salvia miltiorrhiza extract (0.03 wt%) and pure water (the total mass fraction of the raw materials is 100%);
(11) coiling for standby: and (3) rapidly drying the paper web sprayed by the nursing cleaning solution by cold air, and then winding the paper web to a winding roller to obtain the soft easily degradable flushable plant fiber facial cleaning towel for later use.
Effects of the embodiment
(1) The sheets obtained in examples 1-3 and comparative examples 1-4 were tested for bulk according to GB/T24328.2-2020 and softness according to GB/T8942-2016, and the results are shown in Table 1.
TABLE 1
From examples 1-3 it can be seen that: the hardwood pulp fibers are short and thick, and the increase of the proportion can loosen the structure of the paper sheet and improve the bulk and the softness of the paper sheet.
As can be seen from example 3 and comparative example 4: under the same ration, the paper sheet after the hot air penetration drying has higher bulk and softness, which is beneficial to reducing the fiber consumption and the cost.
(2) The sheets obtained in examples 1 to 3 and comparative examples 1 to 4 were tested for their water absorption capacity in a constant temperature and humidity room according to GB/T24328.6-2020, and the results are shown in Table 2.
TABLE 2
From examples 1-3 it can be seen that: hardwood pulp has better absorbency than long fiber pulp such as softwood.
As can be seen from example 3 and comparative example 4: compared with hot air through drying, the drying of the yankee dryer enables the paper sheet structure to be more compact, and the improvement of the water absorption capacity of the paper sheet is not facilitated.
(3) The sheets obtained in examples 1-3 and comparative examples 1-4 were taken and tested for wet tensile strength and elongation at break according to GB/T24328.4-2020 and GB/T24328.3-2020 and the results are shown in Table 3.
TABLE 3
As can be seen from example 3 and comparative example 1: the long and short fibers are separately pulped to different degrees, so that the pulp can be more uniformly dispersed, the short fibers are protected from being excessively cut off and devillicate and broomed, and the wet tensile strength and the elongation at break of the paper sheet are improved.
As can be seen from example 3 and comparative example 2: the addition of a proper amount of regenerated cellulose fibers can improve the long fiber ratio in the paper pulp and improve the flexibility, the wet tensile strength and the elongation at break of paper sheets.
As can be seen from example 3 and comparative example 3: the hydroentangling process can further raise the binding force between fibers and further raise the wet tensile strength and elongation at break of paper sheet.
(4) Dispersibility test:
paper sheets obtained in examples 1-3 and comparative examples 1-6 were tested for dispersibility according to GB/T40181-2021, and the results are shown in Table 4.
TABLE 4
As can be seen from Table 4, the sheets obtained in examples 1 to 3 and comparative examples 1 to 4 all had a decomposition rate of more than 95% in the shaking box decomposition test, and had good dispersibility.
② taking the paper sheet prepared in the example 3 and cutting the paper sheet into the size of 150mm multiplied by 200mm, adding 1L of tap water into an L12-102A Jiuyang high-speed wall breaking machine, rotating the paper sheet for 15s at 1000r/min to test the flushability of the paper sheet, and taking the commercial conventional 100 percent regenerated cellulose facial tissue (the fixed quantity is 60 g/m) 2 250 μm thick, available from Huamei non-woven fabrics Co., Ltd, Henan province) and soy protein fiber facial tissue (basis weight 50 g/m) 2 220 μm thick, available from Huamei non-woven fabric Co., Ltd, Henan province) under the same conditions, and the results are shown in FIG. 2.
As can be seen from fig. 2: the tissue obtained in example 3 was broken and separated after 15 seconds of agitation, whereas the conventional 100% regenerated cellulose fiber tissue and the soy protein fiber tissue on the market did not change significantly, and the paper structure remained intact, indicating that the dispersibility of the two products was not as good as that of the tissue prepared in the present invention.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (10)
1. A preparation method of a soft, easily degradable and dispersible plant fiber facial cleaning towel is characterized by comprising the following steps:
(1) pulping by short fiber pulping: diluting and pulping bleached hardwood pulp, and then performing pulping treatment to brooming the bleached hardwood pulp to obtain short fiber pulp with the beating degree of 18-20 DEG SR;
(2) pulping the long fiber crushed pulp: mixing bleached softwood pulp and bleached hardwood pulp, diluting and pulping, and then performing pulping treatment to perform fibrillation to obtain long fiber pulp with the beating degree of 22-24 DEG SR;
(3) slurry preparation: mixing the short fiber slurry and the long fiber slurry according to the mass ratio of 1:1 to obtain mixed slurry I; then adding regenerated cellulose fibers accounting for 10-25% of the total mass of the mixed slurry I, and adding a softening agent to obtain mixed slurry II; slightly pulping the mixed slurry II until the pulping degree is 24-26 DEG SR to obtain mixed slurry III; adding a wet strength agent into the mixed slurry III, uniformly stirring, and screening slurry through a pressure screen to obtain mixed slurry IV;
(4) preparing base paper: forming a uniform mixed fiber web from the mixed slurry IV in a paper pulp former, carrying out slight extrusion dehydration on the mixed fiber web, carrying out spunlace reinforcement treatment, carrying out extrusion dehydration, and carrying out through-air drying to obtain a paper web with a solid content of 73-75%; continuously drying the paper web through a yankee dryer until the solid content is 92-94% to obtain a dried paper web; wrinkling the dried paper web by a scraper to obtain base paper; the spunlace reinforcement treatment is 3-8 spunlace reinforcement treatments, the acting distance of a water needle is 12-16 mm, the water pressure of the spunlace treatment is increased and then reduced, and the water pressure range is 4-10 MPa;
(5) double-sided spraying: spraying a nursing cleaning solution on one side or two sides of the base paper, and drying to obtain a soft easily degradable flushable plant fiber facial cleaning towel; wherein the nursing cleaning solution is at least one of glycerol, betaine, sodium hyaluronate, witch hazel extract, aloe extract and salvia miltiorrhiza extract.
2. The method of claim 1, wherein:
the bleached hardwood pulp in steps (1) and (2) is at least one of bleached poplar pulp, bleached eucalyptus pulp and bleached acacia pulp;
the mass ratio of the bleached softwood pulp to the bleached hardwood pulp in the step (2) is 6-8: 2-4;
the addition amount of the regenerated cellulose fibers in the step (3) accounts for 15-20% of the total mass of the mixed slurry I.
3. The method of claim 2, wherein:
the bleached hardwood pulp in the steps (1) and (2) is mixed bleached hardwood pulp consisting of 30-60 wt% of bleached poplar pulp fibers, 20-30 wt% of bleached eucalyptus pulp fibers and 20-30 wt% of bleached acacia wood pulp fibers;
the mass ratio of the bleached softwood pulp to the bleached hardwood pulp in the step (2) is 6: 4.
4. the method of claim 1, wherein:
the softening agent in the step (3) is an ester quaternary ammonium salt softening agent;
the wet strength agent in the step (3) is polyamide polyamine epichlorohydrin resin;
the nursing cleaning solution in the step (5) contains the following components in percentage by weight: 0.05-0.1% of glycerin, 0.1-0.2% of betaine, 0.01-0.05% of sodium hyaluronate, 0.01-0.05% of witch hazel extract, 0.01-0.05% of aloe extract, 0.01-0.03% of salvia miltiorrhiza extract and the balance of water.
5. The method of claim 4, wherein:
the softening agent in the step (3) is REWOQUAT WE45VEG triethanolamine ester based quaternary ammonium salt softening agent;
the nursing cleaning solution in the step (5) contains the following components in percentage by weight: 0.1% of glycerin, 0.2% of betaine, 0.05% of sodium hyaluronate, 0.05% of witch hazel extract, 0.05% of aloe extract, 0.03% of salvia miltiorrhiza extract and the balance of water.
6. The method of claim 1, wherein:
the spunlace reinforcement treatment in the step (4) is 6 spunlace reinforcement treatments; wherein the acting distance of the water jet is 16mm, and the water pressure of the spunlace reinforcement is 4MPa, 5-6 MPa, 6-8 MPa, 5-6 MPa and 4MPa respectively;
the temperature of the hot air through drying in the step (4) is 400-450 ℃;
the creping conditions of the scraper in the step (4) are as follows: the angle of the wrinkling scraper is 75-90 degrees, the wrinkling speed ratio is 1.2-1.3, and the wrinkling rate is 25-75%.
7. The method of claim 6, wherein:
the temperature of the hot air penetration drying in the step (4) is 450 ℃;
the creping conditions of the scraper in the step (4) are as follows: the creping doctor angle was 75 °, the creping speed ratio was 1.2 and the creping rate was 50%.
8. The method of claim 1, wherein:
the concentration of the slurry in the pulping in the steps (1) and (2) is 4-6 wt%;
the time for pulping in the steps (1) and (2) is 8-12 min;
the beating degree of the short fiber slurry in the step (1) is 18 DEG SR;
the beating degree of the long fiber slurry in the step (2) is 22 DEG SR;
the addition amount of the softening agent in the step (3) accounts for 0.08-0.1% of the mass of the base paper;
the wet strength agent in the step (3) accounts for 0.3-1.0% of the mass of the base paper;
the basis weight of the paper obtained by the paper pulp forming in the step (4) is 10-80 g/m 2 ；
The single-side spraying amount of the nursing cleaning solution in the step (5) is 4-6 g/m 2 。
9. A soft, easily degradable and dispersible plant fiber facial cleaning towel is characterized in that: prepared by the method of any one of claims 1 to 8.
10. Use of a soft, readily degradable, flushable plant fiber facial cleanser according to claim 9 for the preparation of tissue for daily use.
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