CN109281230B - Paper mulberry bark hairtail silk and preparation method of machine-made hairtail paper thereof - Google Patents

Paper mulberry bark hairtail silk and preparation method of machine-made hairtail paper thereof Download PDF

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CN109281230B
CN109281230B CN201811125397.1A CN201811125397A CN109281230B CN 109281230 B CN109281230 B CN 109281230B CN 201811125397 A CN201811125397 A CN 201811125397A CN 109281230 B CN109281230 B CN 109281230B
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paper
mulberry bark
fiber
dragon
silk
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CN109281230A (en
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陈杰
童树华
孟育
张求荣
詹卫民
夏新兴
徐玉清
王励稼
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Zhejiang Jinchang Specialty Paper Co ltd
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Zhejiang Jinchang Specialty Paper Co ltd
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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • 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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/53—Polyethers; Polyesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/08—Dispersing agents for fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper

Abstract

The invention relates to a paper mulberry bark hairtail silk and a preparation method of machine-made hairtail paper thereof. The method comprises the first step of preparing paper mulberry bark cellosilk by removing pectin and hemicellulose from paper mulberry bark and improving the whiteness of the paper mulberry bark by using sodium hydroxide and hydrogen peroxide and adjusting the temperature, the second step of defibering the paper mulberry bark cellosilk and adding a thickening agent, a lubricating agent, a cationic substance and a dispersing agent to prepare a suspension, the third step of diluting the suspension of the hairline silk and dehydrating the hairline silk by using a long net to transfer the hairline silk to the surface of the long net, the fourth step of defibering wood pulp, pulping the wood pulp and adding a filler, a retention aid and the like to form base paper on a paper machine, and the fifth step of compounding the formed hairline silk and the base paper in a pressurizing manner, transferring the hairline silk to the surface of the base paper, and preparing the hairline paper by pressing, drying, paper rolling and. Compared with the traditional printed matter, the appearance of the dragon playing paper is beautiful and elegant, the design is novel, and the dragon playing paper has very high artistic value.

Description

Paper mulberry bark hairtail silk and preparation method of machine-made hairtail paper thereof
Technical Field
The invention belongs to the field of special paper manufacturing, and particularly relates to a method for preparing paper mulberry bark dragon silk, transferring and forming paper mulberry bark dragon silk and preparing dragon paper by composite forming.
Background
The dragon paper is a high-grade special paper, the raw material adopts natural plant fiber, the appearance has extremely high ornamental value and artistic value, the dragon paper is a novel special material for high-grade packaging, and the dragon paper can also be processed and used for the industries of indoor decoration, building materials, clothes, handicraft articles and the like. At present, the method is used for manufacturing handicraft paper products in the market, and also used for posters, lamp shades, book binding, gift paper boxes and the like.
The dragon paper is characterized by different types, shapes, colors and textures of plant fiber filaments on the surface. Compared with the traditional printing products, the appearance is more beautiful and unsophisticated, the design is novel, and the artistic value is extremely high. Internationally, japan and korea are leading in the development of the dragon paper at present, and the development of domestic mechanism dragon paper has achieved certain results.
Disclosure of Invention
The invention provides a paper mulberry bark hairtail silk and a preparation method of machine-made hairtail paper thereof, aiming at the defects of the prior art.
The specific method of the invention is as follows:
(1) preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with width of 1-10mm and length of 5-500mm, soaking in 2-20% sodium hydroxide solution, heating to 90-150 deg.C, maintaining for 50-120min, and removing pectin and hemicellulose. Then, washing with water to be neutral, adding water to adjust the mass concentration to be 3% -15%, adding 1% -8% of sodium hydroxide and 2% -8% of hydrogen peroxide (both in mass percentage relative to the paper mulberry bark), heating to 60-120 ℃, keeping the temperature for 60-120min, washing, removing residual pectin, lignin and the like, and improving the whiteness of the paper mulberry bark to be more than 85 ℃ to obtain the paper mulberry bark cellosilk.
(2) Preparation of paper mulberry bark hairline suspension: putting paper mulberry bark fiber filaments into a defibering and filament separating device, adding water to adjust the mass concentration to be 0.1-1%, starting the defibering device to enable the fiber filaments to be loose and free from large pulp lumps to flocculate and settle, slowly stirring to keep the fiber filaments to be always in a suspended and dispersed state, and enabling the fiber filaments to be consistent with the water flow direction under the drive of the water flow. Adding 0.5-5% of thickener and lubricant A (mass percentage relative to paper mulberry bark), increasing water viscosity, promoting mutual flocculation of fiber filaments, and properly flocculating the fiber filaments by controlling agitation of fluffing equipment and controlling the speed of water flow. The fiber filaments form a certain fiber tow after being stirred. Then 0.1% -1% of cationic substance B is added, the surface of the substance has stronger cationic charges, the substance has anionic charge interaction with the surface of the fiber, the close combination in the fiber tows is promoted, and the single fiber and the fiber tows are promoted to be flocculated to form the fiber tows with stable structure. 0.5 to 5 percent of dispersant C is added, and the dispersant is uncharged, can not damage the stable structure of the fiber tows, and also can prevent the fiber tows from aggregating. With the stirring of the stirrer, the shearing force of the water flow promotes the fiber tows to be in a streamline shape and a shuttle shape, such as a water flow curve, the shape is beautiful, and the fiber tows are the "dragon yarns". The length of the hairspring can be adjusted according to the requirement, and the range can reach 5mm-100 mm.
(3) And (3) forming the dragon wire on the net: the suspension of the "floating dragon silk" is diluted to a certain concentration, the "floating dragon silk" is driven to be spread on the surface of the long net through the natural flow of water, and the "floating dragon silk" is transferred on the surface of the long net through dehydration. The "dragon wire" is driven by water flow to form beautiful curve form.
(4) Preparing base paper: the wood pulp is defibered and ground into pulp, certain papermaking additives including fillers, retention aids and the like are added, and then the pulp is formed on a net to prepare the base paper.
(5) Preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared through the working sections of squeezing, drying, paper rolling and the like.
Further, the chemical A is one or more of oxidized starch adhesive, polyvinyl alcohol adhesive or water-based polyurethane adhesive.
Furthermore, the cationic substance B is one or two of cationic polyacetamide and cationic polyphosphate.
Furthermore, the chemical C dispersing agent is one or more of stearic acid monoglyceride, polyacrylamide and derivatives thereof, and alkyl sodium naphthalene sulfonate, or is mixed according to any proportion.
Furthermore, the surface of the dragon paper fiber is provided with the 'dragon silk' structure which is compact and evenly distributed.
Furthermore, the base paper has a quantitative weight of 15-300g/m2。
The invention has the beneficial effects that: compared with the traditional printed matter, the dragon playing paper obtained by the invention is beautiful and elegant, has novel design and has very high artistic value.
Drawings
FIG. 1 is a graph of a dragon paper prepared by the method of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
Detailed Description
The principle of the method of the invention is as follows: the paper mulberry bark contains a large amount of pectin, lignin and hemicellulose, and needs to be removed by sodium hydroxide and hydrogen peroxide, cellulose components are reserved, the paper mulberry bark is subjected to defibering and silk splitting, forms an elegant streamline shape and a shuttle shape under the action of a chemical additive and water flow shearing force, is dehydrated and transferred to the surface of a long net through the long net, and is subjected to pressure compounding with the prepared base paper and the dragon silk under certain pressure to transfer the dragon silk to the surface of the base paper to form the dragon paper.
The technical scheme of the invention is as follows:
(1) preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with the width of 1-10mm and the length of 5-500mm, soaking the pieces in a sodium hydroxide solution with the mass concentration of 2-20%, heating to 90-150 ℃, preserving heat for 50-120min, removing pectin, hemicellulose and the like, washing with water to be neutral, adding water to adjust the mass concentration to 3-15%, adding 1-8% of sodium hydroxide and 2-8% of hydrogen peroxide (both in mass percentage relative to the paper mulberry bark), heating to 60-120 ℃, preserving heat for 60-120min, washing, removing residual pectin, lignin and the like, and improving the whiteness of the paper mulberry bark to 85-90 ℃ to obtain the paper mulberry bark cellosilk.
(2) Preparation of paper mulberry bark hairline suspension: putting paper mulberry bark fiber filaments into a defibering and filament separating device, adding water to adjust the mass concentration to be 0.1-1%, starting the defibering device to enable the fiber filaments to be in a loose state without lumpy pulp mass flocculation and sedimentation, slowly stirring to keep the fiber filaments to be in a suspended and dispersed state all the time, enabling the fiber filament direction to be consistent with the water flow direction under the driving of the water flow, adding 0.5-5% of thickening agent and lubricant A (mass percentage relative to the paper mulberry bark), improving the viscosity of water, promoting mutual flocculation among the fiber filaments, controlling the stirring of the defibering device, and enabling the fiber filaments to be properly flocculated by controlling the speed of the water flow. The fiber filaments form a certain fiber tow after being stirred. Then 0.1-1% of cationic substance B (mass percentage relative to paper mulberry bark) is added to interact with anionic charges on the surfaces of the fiber yarns, so as to promote the close combination inside the fiber tows and promote the flocculation of single fiber yarns and the fiber tows, thus forming the fiber tows with stable structure. 0.5 to 5 percent of dispersant C (mass percent relative to paper mulberry bark) is added, so that the fiber tows are prevented from being flocculated and agglomerated while the stable structure of the fiber tows is not damaged. Then the fiber tows are stirred by a stirrer, and the fiber tows are promoted to be in a streamline shape and a shuttle-shaped shape by the shearing force of water flow, such as a flowing water curve, and the shape is beautiful, and the fiber tows are the "dragon yarns", as shown in fig. 1 and fig. 2.
(3) And (3) forming the dragon wire on the net: the suspension of the "floating dragon silk" is diluted to a certain concentration, the "floating dragon silk" is driven to be spread on the surface of the long net through the natural flow of water, and the "floating dragon silk" is transferred on the surface of the long net through dehydration. The "dragon wire" is driven by water flow to form beautiful curve form.
(4) Preparing base paper: defibering and pulping wood pulp, adding certain papermaking additives including filler, retention aid and the like, and then forming on a net to obtain 15-300g/m2Quantitative base paper.
(5) Preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared through the working sections of squeezing, drying, paper rolling and the like.
Further, the chemical A is one or more of a polyvinyl alcohol adhesive, an oxidized starch adhesive or a water-based polyurethane adhesive.
Furthermore, the cationic substance B is one or two of cationic polyphosphate and cationic acetamide.
Furthermore, the chemical C dispersing agent is one or more of stearic acid monoglyceride, polyacrylamide and derivatives thereof, and alkyl sodium naphthalene sulfonate, or is mixed according to any proportion.
Furthermore, the surface of the dragon paper fiber is provided with the 'dragon silk' structure which is compact and evenly distributed.
Example 1
(1) Preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with width of 1mm and length of 5mm, soaking in 2% sodium hydroxide solution, heating to 90 deg.C, maintaining for 50min, and removing pectin and hemicellulose. Then, washing with water to neutrality, adding water to adjust the mass concentration to 3%, adding 1% sodium hydroxide and 2% hydrogen peroxide (both in mass percent relative to paper mulberry bark), heating to 60 ℃, keeping the temperature for 60min, washing, removing residual pectin, lignin and the like, and improving the whiteness of the paper mulberry bark to 85 ℃ to obtain the paper mulberry bark cellosilk.
(2) Preparation of paper mulberry bark hairline suspension: putting paper mulberry bark cellosilk into a defibering and splitting device, adding water to adjust the mass concentration to be 0.1%, starting the defibering device to enable the cellosilk to be in a loose state without agglomeration and sedimentation of large pulp lumps, slowly stirring to keep the cellosilk to be in a suspended and dispersed state all the time, and enabling the direction of the cellosilk to be consistent with the direction of water flow under the driving of the water flow. 0.5 percent of thickening agent and lubricant polyvinyl alcohol adhesive (mass percent relative to paper mulberry bark) is added to improve the viscosity of water and promote mutual flocculation of the fiber yarns, and the fiber yarns are properly flocculated by controlling the stirring of fluffing equipment and controlling the speed of water flow. The fiber filaments form a certain fiber tow after being stirred. Then 0.1% of cationic polyphosphate is added to interact with anionic charges on the surfaces of the fiber yarns, so that the tight combination inside the fiber tows is promoted, and the flocculation of single fiber yarns and the fiber tows is promoted to form the fiber tows with stable structures. 0.5 percent of dispersant stearic acid monoglyceride is added, so that the fiber tows are prevented from being flocculated and agglomerated while the stable structure of the fiber tows is not damaged. Then the fiber tows are stirred by a stirrer, the fiber tows are promoted to be in a streamline shape and a shuttle-shaped shape by the shearing force of water flow, the shape is beautiful like a flowing water curve, and the fiber tows are the "dragon yarn".
(3) And (3) forming the dragon wire on the net: the suspension of the "floating dragon silk" is diluted to a certain concentration, the "floating dragon silk" is driven to be spread on the surface of the long net through the natural flow of water, and the "floating dragon silk" is transferred on the surface of the long net through dehydration. The "dragon wire" is driven by water flow to form beautiful curve form.
(4) Preparing base paper: defibering and pulping wood pulp, adding certain papermaking additives including filler, retention aid and the like, and then forming on a net to obtain 15g/m2Quantitative base paper.
(5) Preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared through the working sections of squeezing, drying, paper rolling and the like.
Example 2
(1) Preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with width of 5mm and length of 200mm, soaking in 10% sodium hydroxide solution, heating to 120 deg.C, maintaining for 80min, and removing pectin and hemicellulose. Then, washing with water to neutrality, adding water to adjust the mass concentration to 12%, adding 5% sodium hydroxide and 5% hydrogen peroxide (both in mass percent relative to paper mulberry bark), heating to 100 ℃, keeping the temperature for 100min, washing, removing residual pectin, lignin and the like, and improving the whiteness of the paper mulberry bark to 88 ℃ to obtain the paper mulberry bark cellosilk.
(2) Preparation of paper mulberry bark hairline suspension: putting paper mulberry bark cellosilk into a defibering and splitting device, adding water to adjust the mass concentration to be 0.5%, starting the defibering device to enable the cellosilk to be in a loose state without agglomeration and sedimentation of large pulp lumps, slowly stirring to keep the cellosilk to be in a suspended and dispersed state all the time, and enabling the direction of the cellosilk to be consistent with the direction of water flow under the driving of the water flow. Adding 3% of thickening agent and lubricating oxidized starch adhesive (mass percentage relative to paper mulberry bark), increasing water viscosity, promoting mutual flocculation of fiber filaments, controlling stirring of fluffing equipment, and controlling the speed of water flow to enable the fiber filaments to be properly flocculated. The fiber filaments form a certain fiber tow after being stirred. Then 0.5% cationic substance cationic poly acetamide is added to interact with anionic charges on the surfaces of the fiber yarns, so as to promote the tight combination of the interior of the fiber tows and promote the flocculation of single fiber yarns and the fiber tows, thereby forming the fiber tows with stable structure. 0.5 percent of dispersant stearic acid monoglyceride is added, so that the fiber tows are prevented from being flocculated and agglomerated while the stable structure of the fiber tows is not damaged. Then the fiber tows are stirred by a stirrer, the fiber tows are promoted to be in a streamline shape and a shuttle-shaped shape by the shearing force of water flow, the shape is beautiful like a flowing water curve, and the fiber tows are the "dragon yarn".
(3) And (3) forming the dragon wire on the net: the suspension of the "floating dragon silk" is diluted to a certain concentration, the "floating dragon silk" is driven to be spread on the surface of the long net through the natural flow of water, and the "floating dragon silk" is transferred on the surface of the long net through dehydration. The "dragon wire" is driven by water flow to form beautiful curve form.
(4) Preparing base paper: defibering and pulping wood pulp, adding certain papermaking additives including filler and retention aid, and then forming on a net to obtain 150g/m2Quantitative base paper.
(5) Preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared through the working sections of squeezing, drying, paper rolling and the like.
Example 3
(1) Preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with width of 10mm and length of 500mm, soaking in 20% sodium hydroxide solution, heating to 150 deg.C, maintaining for 120min, and removing pectin and hemicellulose. Then, washing with water to be neutral, adding water to adjust the mass concentration to be 15%, adding 8% of sodium hydroxide and 8% of hydrogen peroxide (both in mass percentage relative to the paper mulberry bark), heating to 120 ℃, keeping the temperature for 120min, washing, removing residual pectin, lignin and the like, and improving the whiteness of the paper mulberry bark to 90 ℃ to obtain the paper mulberry bark cellosilk.
(2) Preparation of paper mulberry bark hairline suspension: putting paper mulberry bark cellosilk into a defibering and splitting device, adding water to adjust the mass concentration to be 1%, starting the defibering device to enable the cellosilk to be in a loose state without large pulp lumps flocculating and settling, slowly stirring to keep the cellosilk to be in a suspended and dispersed state all the time, and enabling the direction of the cellosilk to be consistent with the direction of water flow under the driving of the water flow. Adding 5% of thickener and lubricant water-based polyurethane adhesive (mass percentage relative to paper mulberry bark), increasing water viscosity, promoting mutual flocculation of fiber filaments, and properly flocculating the fiber filaments by controlling agitation of fluffing equipment and controlling the speed of water flow. The fiber filaments form a certain fiber tow after being stirred. Then adding 1% of cationic substance cationic polyphosphate and cationic acetamide mixture to interact with anionic charges on the surfaces of the fiber yarns, promoting the tight combination of the interior of the fiber tows, and promoting the flocculation of single fiber yarns and the fiber tows to form the fiber tows with stable structures. 0.5 percent of dispersant stearic acid monoglyceride is added, so that the fiber tows are prevented from being flocculated and agglomerated while the stable structure of the fiber tows is not damaged. Then the fiber tows are stirred by a stirrer, the fiber tows are promoted to be in a streamline shape and a shuttle-shaped shape by the shearing force of water flow, the shape is beautiful like a flowing water curve, and the fiber tows are the "dragon yarn".
(3) And (3) forming the dragon wire on the net: the suspension of the "floating dragon silk" is diluted to a certain concentration, the "floating dragon silk" is driven to be spread on the surface of the long net through the natural flow of water, and the "floating dragon silk" is transferred on the surface of the long net through dehydration. The "dragon wire" is driven by water flow to form beautiful curve form.
(4) Preparing base paper: wood pulp is defibered and ground into thick liquid, certain papermaking additives including filler, retention aid and the like are added, then the mixture is formed on a net, and 300g/m is prepared2Quantitative base paper.
(5) Preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared through the working sections of squeezing, drying, paper rolling and the like.

Claims (2)

1. A method for preparing machine-made dragon paper based on paper mulberry bark dragon silk is characterized by comprising the following steps:
step one, preparing paper mulberry bark fiber: splitting paper mulberry bark into pieces with the width of 1-10mm and the length of 5-500mm, soaking the pieces in a sodium hydroxide solution with the mass concentration of 2-20%, heating to 90-150 ℃, preserving heat for 50-120min, removing pectin and hemicellulose, washing with water to be neutral, adding water to adjust the mass concentration to 3-15%, adding sodium hydroxide with the mass percentage of 1-8% relative to the paper mulberry bark and hydrogen peroxide with the mass percentage of 2-8% relative to the paper mulberry bark, heating to 60-120 ℃, preserving heat for 60-120min, washing, removing residual pectin and lignin, and increasing the whiteness of the paper mulberry bark to 85-90 ℃ to obtain paper mulberry bark cellosilk;
secondly, preparing paper mulberry bark free filament suspension: putting paper mulberry bark fiber filaments into defibering and filament separating equipment, adding water to adjust the mass concentration to be 0.1-1%, starting the defibering equipment to enable the fiber filaments to be in a loose state without lumpy pulp mass flocculation and sedimentation, slowly stirring to keep the fiber filaments to be in a suspended and dispersed state all the time, enabling the direction of the fiber filaments to be consistent with the direction of water flow under the driving of the water flow, adding a thickening lubricant A accounting for 0.5-5% of the paper mulberry bark in mass percentage, improving the viscosity of water, promoting mutual flocculation among the fiber filaments, and enabling the fiber filaments to be properly flocculated by controlling the stirring of the defibering equipment and the speed of the water flow;
the fiber filaments form a certain fiber tow after being stirred; then adding a cationic substance B accounting for 0.1-1% of the mass percent of the paper mulberry bark, enabling the cationic substance B to interact with anionic charges on the surfaces of the fiber yarns, promoting the tight combination of the interior of the fiber tows, and promoting the flocculation of single fiber yarns and the fiber tows to form the fiber tows with stable structures;
adding 0.5-5% of dispersant C by mass percent relative to the paper mulberry bark, and preventing the fiber tows from aggregating while not damaging the stable structure of the fiber tows; then stirring by a stirrer, and promoting the fiber tows to be in a streamline shape and a shuttle shape by the shearing force of water flow, wherein the fiber tows are the floating yarns;
thirdly, the hairspring is formed on the net: diluting the suspension of the "dragon silk" to a certain concentration, driving the "dragon silk" to be flatly laid on the surface of the long net through natural flow of water, and transferring the "dragon silk" to the surface of the long net through dehydration;
fourthly, preparing base paper: defibering and pulping wood pulp, adding certain papermaking additives including filler and retention aid, and then forming on a net to obtain 15-300g/m2A quantitative base paper;
fifthly, preparing the dragon paper by composite forming: the formed "dragon silk" is compounded with base paper, after a certain pressure compounding, the dragon silk is transferred to the surface of the base paper, and then the dragon paper is prepared by squeezing, drying and paper rolling.
2. The method for preparing machine-made dragon paper based on Broussonetia papyrifera filaments according to claim 1, wherein the thickening lubricant A is one or more of polyvinyl alcohol adhesive, oxidized starch adhesive or water-based polyurethane adhesive, the cationic substance B is one or two of cationic polyphosphate and cationic acetamide, and the dispersant C is one or more of glyceryl monostearate, polyacrylamide and derivatives thereof and sodium alkyl naphthalene sulfonate.
CN201811125397.1A 2018-09-26 2018-09-26 Paper mulberry bark hairtail silk and preparation method of machine-made hairtail paper thereof Active CN109281230B (en)

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